9.6v 18Ah Lifepo4 Battery

In addition to custom lithium battery pack being popular, manganese-based cathode materials are ushering in the second wave of peaks. Manganese-based batteries were first promoted during the heyday of the Nissan Leaf. As a second-generation product of manganese-based materials, lithium iron manganese phosphate has entered the early stages of mass production and has attracted much attention from the industry.

Companies such as AVIC lithium battery, Guoxuan Hi-Tech, and REPT have all mentioned some progress in iron manganese super phosphate lithium batteries.For example, from 2023 to 2024, the energy density of REPT’s lithium iron manganese phosphate will reach 500Wh/L, supporting a battery life of 800 kilometers for pure electric vehicles; AVIC Lithium Battery will reduce lithium consumption by 15% through lithium iron manganese phosphate batteries. In addition to the above-mentioned companies, many power battery manufacturers such as CATL, BYD, and EVE Lithium Energy among the top ten power battery companies have also begun to carry out related research and development and layout of iron manganese phosphate lithium batteries.

Among them, the lithium iron manganese phosphate produced by many companies has passed battery pilot tests in the first half of this year and is sending samples to car companies for testing. CATL will mass-produce M3P batteries in the second half of the year. Another potential product, lithium-rich manganese-based batteries, is still in the development stage. At present, the lithium-rich manganese-based material has reached 400mAh/g in the laboratory stage, and is expected to reach 400mAh/g in mass production. The battery energy density can reach 400Wh/kg.

Lithium iron manganese phosphate has obvious advantages and disadvantages

The application of manganese in custom lithium battery pack cathode materials is currently mainly lithium manganate and lithium nickel cobalt manganate (ternary materials). With the advancement of material modification technology, manganese-based cathode materials lithium iron manganese phosphate and lithium-rich manganese-based technology have developed rapidly.

Lithium iron manganese phosphate has become a transition product between lithium iron phosphate and ternary batteries. It is characterized by higher energy density than lithium iron phosphate and lower cost than ternary lithium batteries.

12V 300Ah Lifepo4 Custom Lithium Battery Pack

Lithium iron manganese phosphate has the same olivine structure as lithium iron phosphate, and the structure is more stable during charge and discharge. Even if all lithium ions are embedded during charging, the structure will not collapse, making it safer. Specifically, you will find that the advantages and disadvantages of lithium iron manganese phosphate are very obvious.

First, the energy density is better. The voltage platform of lithium iron manganese phosphate is as high as 4.1V, which is higher than the 3.4V of lithium iron phosphate. The high voltage brings an increase in energy density. The theoretical energy density is 15%-20% higher than that of lithium iron phosphate, and can basically reach the level of ternary battery NCM523.

Second, the low temperature performance is better. Lithium iron manganese phosphate has better low-temperature performance than lithium iron phosphate, and the capacity retention rate at -20°C can reach about 75%. Third, it has the characteristics of lithium iron phosphate batteries and is safer than ternary batteries. Lithium iron manganese phosphate has an olivine structure and has better safety and cycle stability than ternary.

Fourth, manganese ore resources are abundant and the cost is low. The cost of lithium iron manganese phosphate is only about 5%-10% higher than that of lithium iron phosphate. Taking into account the improvement in the energy density of lithium iron-manganese phosphate, in terms of battery installed cost, the cost per watt-hour of lithium iron-manganese phosphate is slightly lower than that of custom lithium battery pack , and significantly lower than that of ternary batteries.

The disadvantage of lithium iron manganese phosphate battery is that its conductivity and lithium ion diffusion speed are low, which will make it difficult to fully utilize its capacity advantage and poor rate performance. However, in the opinion of Guoxuan Hi-Tech personnel, lithium iron manganese phosphate is basically an insulator. “Japan’s Sony Corporation has calculated that the band gap of general lithium iron phosphate materials is about 0.3eV, which is a semiconductor, but lithium iron manganese phosphate is 2eV, which is basically an insulator and does not conduct electricity.”

Improvement plan for lithium iron manganese phosphate materials

Compared with custom lithium battery pack , due to the addition of manganese, the dissolution of manganese will cause its cycle life to be reduced. In view of the above reasons, when manganese is used as a single active material, doping, carbon coating, nanotechnology modification and other methods are often used to improve the performance of lithium iron manganese phosphate materials.

This conductive network cannot be formed if it is not on the nanoscale. But once nanosized, it is not easy to combine the slurry and the coating is not easy to apply. It is difficult to use as a lithium iron manganese phosphate battery alone, and many problems need to be solved. Zhongchuang Aviation’s solution is to consider how to gradient design the manganese element. The inside and outside are not necessarily uniform, there may be a gradient design. It can be more on the outside and less on the inside, so that the entire conductive path will be smoother.

Secondly, it is doped with many other transition metal elements to give it a better balance of energy and conductivity. Then there is a problem on the interface, and coating the interface will solve the conductive problem of the interface on the one hand. On the other hand, it also effectively solves the problem of life decay caused by the phase change of the lithium manganese material itself.

REPT, one of China’s top ten lithium marine battery manufacturers, also mentioned lithium iron manganese phosphate. Their goal is to achieve an energy density of 500Wh/L for lithium iron manganese phosphate batteries and a driving range of 800 kilometers in 2023-2024. In addition to the above-mentioned companies, CATL’s M3P batteries are also iron manganese phosphate lithium batteries, which are called phosphate-based ternary batteries. CATL will invest in Lithitech in November 2021, holding 60% of the shares. Among them, Lithitech’s main business is lithium iron manganese phosphate materials, with a production capacity of 2,000 tons/year.

The direction given by researchers from China Electronics Technology Group for the application of lithium iron manganese phosphate is that it can be mixed with ternary materials to improve the safety of ternary material batteries; or mixed with lithium iron phosphate to increase the energy density of custom lithium battery pack.

The past and future of manganese-based batteries

The currently hotly debated lithium iron manganese phosphate is a second-generation manganese-based battery, a transitional product through material modification. The first generation of manganese-based batteries were lithium manganate batteries. Lithium manganate cathode material was invented 20 years ago and was used in the first generation of new energy vehicles in Japan and South Korea.

Lithium manganese oxide batteries in Japan and South Korea mainly use single crystal particle doping. Among them, the master was the Japanese battery company AESC at the time. Early model Nissan Leafs were known for their battery safety. But the shortcomings are also obvious. Due to low energy density, the driving range is only 200 kilometers. However, at present, AESC still takes ternary batteries as the mainstream development direction.

Lithium iron manganese phosphate is not a new direction either. As early as 2013, BYD considered lithium iron manganese phosphate as an upgrade route for lithium iron phosphate and began to apply for relevant patents. However, due to the subsidy policy tilting towards ternary materials with higher energy density, and BYD’s failure to solve the problems of low cycle life and excessive internal resistance of lithium iron manganese phosphate batteries, this route has not become mainstream. BYD once stopped phosphoric acid Iron, manganese and lithium exploration.

However, starting in 2020, BYD has begun to have relevant patent application records. Guoxuan Hi-Tech is also an early company that developed iron manganese phosphate lithium batteries. According to Xu Xingwu, Guoxuan Hi-Tech was also developing lithium iron manganese phosphate batteries in 2013, and obtained new product certificates for lithium iron manganese phosphate batteries in 2014 and 2017 respectively. As early as 2014, AVIC Aluminum began to try and explore on the road to high manganese.

Lifepo4 Cells 6.4V Custom Lithium Battery Pack

In 2014, AVIC lithium battery has adopted lithium iron manganese phosphate and ternary batteries as composite material systems and has achieved mass production. At that time, it was a station wagon, and the shipments were actually quite large. Starting in 2021, raw material prices will skyrocket. Against this background, lithium iron manganese phosphate batteries have once again attracted the attention of enterprises, and reports on related layouts have also continued to increase.

The next highly anticipated cathode material is lithium-rich manganese-based material. Lithium-rich manganese-based materials have high specific capacity, low cost and good safety. Lithium-rich manganese-based cathode materials can be considered to be composed of two components, Li2MnO3 and LiMO2, which are uniformly compounded on the atomic scale to form lithium-rich manganese-based materials.

Lithium-rich manganese-based materials are mainly composed of cheaper manganese elements and contain less precious metals. Compared with commonly used lithium cobalt oxide and nickel cobalt manganese ternary cathode materials, they are not only lower in cost, but also safer. The advantages are outstanding, but there are also many disadvantages. Lithium-rich manganese-based materials have shortcomings such as initial irreversible capacity loss, poor rate performance, and voltage attenuation during cycling.

For manganese-rich lithium-based materials, there are great advantages and great difficulties. It can achieve 400mAh/g, but there is a problem of voltage attenuation. There is no better way to lose oxygen during the circulation process, and the challenge is still relatively large. Professionals believe that lithium-rich manganese-based material batteries can reach the level of 300mAh/g after mass production, and can achieve 400Wh/kg batteries when paired with silicon carbon.

At present, we see many companies making arrangements in the field of lithium-rich manganese-based materials. According to relevant company announcements, cathode material companies such as Rongbai Technology and Dangsheng Technology have planned the research and development of lithium-rich manganese-based materials in advance.

It has now entered the small trial stage and is actively cooperating with relevant customers to carry out product performance optimization and process amplification experiments on the company’s existing production lines.

In addition, Zhenhua New Materials, Zhongwei, Kungong Technology, Tianyuan Group, DFD and other companies have also carried out research and development projects on lithium-rich manganese-based materials (precursors) and are currently actively exploring the feasibility of their commercialization.

final thoughts

New manganese-based cathode materials are rapidly emerging, and their improved permeability is expected to increase the use of manganese in the custom lithium battery pack industry by more than 10 times between 2021 and 2035, and is expected to become one of the main cathode materials for power batteries.


If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
12V 300Ah Lifepo4 Battery

HIMAX has been engaged in li ion customized battery manufacturing for over 12 years. And we would like to share with our customer about the knowledge of AGM replacement battery and lead-acid battery.

Traditional lead-acid battery will cause great pollution to the environment after being discarded, and lead vapor will appear. Lead is not easily excreted from the body and can also cause metabolic, reproductive and neurological diseases in the human body. Once the lead content in the human body exceeds the standard, it will cause mental decline, fetal malformations, easily induce malignant tumors in children, and even lead to death.

AGM Replacement Battery

Compared with lead-acid battery, lithium-ion battery has huge advantages in environmental protection. The materials used in lithium-ion battery contain harmful heavy metals such as cadmium, lead, and mercury. No pollutants appear during the processing and use of lithium-ion battery, which protects human health. The problem of contaminating water sources and soil during the recycling process of waste battery is also easily solved.

AGM replacement battery does not contain any heavy metals or rare metals. It is non-toxic and pollution-free in both processing and use. It complies with European RoHS regulations and is a green battery.

In addition, the advantages of lithium-ion battery is large specific energy, long cycle life, low self-discharge rate, and no memory effect. Lithium-ion battery has high storage energy density, currently reaching 460-600Wh/kg, which is about 6-7 times that of lead-acid battery; the service life of lithium iron phosphate battery can reach 6 years or more than 5,000 cycles.

That’s why lithium-ion battery now is a better AGM replacement battery.

Lithium-ion has developed rapidly in the past decade and will continue to expand and occupy the vast majority of the battery industry’s market share in the future.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

With the development of science and technology, batteries have become an indispensable part of our daily life. Among them, 18650 Li-ion battery pack, as a kind of high energy density and long life battery, is widely used in electronic equipment, electric vehicles, aviation and other fields. This article will introduce the principle, characteristics, applications and safety precautions of 18650 lithium-ion battery pack.

First, the working principle of 18650 lithium-ion battery packs

18650 lithium-ion battery pack is composed of positive pole, negative pole, diaphragm, electrolyte and shell. Its working principle is: when the external circuit through the current, the lithium atoms on the positive electrode is transferred to the negative electrode, forming lithium ions, thus realizing the mutual conversion of electric energy and chemical energy. This process is controlled by the interaction between the lithium ions and the electrolyte, and the lithium ions migrate between the positive and negative electrodes, thus maintaining the voltage balance of the battery.

Second, the characteristics of 18650 lithium-ion battery packs

18650 lithium-ion battery pack has the advantages of high energy density, long life and no memory effect. Its energy density is more than three times that of traditional lead-acid batteries, so it can provide higher power in a smaller volume. Meanwhile, due to its no memory effect, users can charge it anywhere and anytime, which is convenient. In addition, it also has the advantages of good high temperature performance, light weight, easy mass production.

18650 Lithium Ion Battery Pack

Third, 18650 lithium-ion battery pack application areas

18650 battery pack has a wide range of applications, including electronic equipment, electric vehicles, aviation and so on. In terms of electronic equipment, it is widely used in camcorders, digital cameras, tablet PCs and other fields to provide reliable energy security. In the field of electric vehicles, it replaces lead-acid batteries and improves the range and performance of electric vehicles. In the field of aviation, it is widely used in airplanes, providing reliable energy security for airplanes.

Fourth, safety precautions

Although 18650 lithium-ion battery packs have many advantages, it is still necessary to pay attention to safety in the process of use. First, use lithium-ion battery packs produced by regular manufacturers, avoid using low-quality or counterfeit products. Secondly, please do not put the battery in a high temperature environment when charging, high temperature will damage the battery performance. In addition, please do not disassemble, invert or shake the battery during charging to avoid arcing or short-circuiting. Using 18650 Li-ion battery packs in high temperature and high humidity environments may cause safety problems, so it is recommended to use them in a moderate temperature environment.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
Lifepo4 12v 150Ah

With the continuous advancement of technology, energy storage technology is also developing rapidly, among which 12V lead acid replacement battery is gradually gaining popularity as an environmentally friendly and efficient energy storage battery. This article will elaborate on its characteristics, technology, application scenarios, and market prospects.

12V lead acid replacement battery is a type of lead-acid battery designed to meet the specific energy storage requirements of various applications. Compared with traditional lead-acid batteries, lead acid replacement battery features higher energy density, longer service life, and more environmental friendliness.

The manufacturing process of 12V lead acid replacement battery mainly involves several steps: first, smelting lead and lead dioxide, then manufacturing glass fiber grids, injecting lead and lead dioxide mixture into the grids for solidification, charging, and finally packaging. The negative electrode material of this battery is lead, while the positive electrode material is lead dioxide, and the electrolyte is sulfuric acid.

Lead acid replacement battery has been widely used in various fields. In the power industry, it is used to store renewable energy such as solar energy and wind energy for use during power shortages. In the automotive industry, it serves as a starter battery for vehicles and a storage battery for onboard use. Additionally, in standby power sources, communication, and security fields, 12V Lead Acid Replacement Battery has also been widely applied. Its high energy storage density, fast charging speed, and long service life make it highly cost-effective and practical in energy storage applications.

12v Lead Acid Replacement Battery

In the market, lead Acid Replacement Battery has occupied a certain market share. Some well-known brands such as Panasonic, Samsung, and LG are producing and selling this type of battery. These brands have their own advantages in manufacturing processes, performance, and quality, so they are also highly favored by consumers. At the same time, with the continuous advancement of technology and expanding application scenarios, the market demand for this battery is also increasing.

Overall, lead acid replacement battery, as an environmentally friendly and efficient energy storage battery, has high application value and market prospects. Its high energy storage density, fast charging speed, and long service life can meet the energy storage requirements of various application scenarios. At the same time, with the continuous advancement of technology and expanding market, the production cost of this battery is also gradually decreasing, making it more widely used and popularized in the field of energy storage. We believe that in the near future, 12V lead acid replacement battery will become an important choice for environmental energy storage, bringing more convenience and benefits to our lives and production.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

Inconsistencies in custom lithium battery pack parameters mainly refer to inconsistencies in capacity, internal resistance, and open circuit voltage. Inconsistencies in cell performance are formed during the production process and deepen during use. Today, the editor will take you to understand the issue of consistency of lithium battery packs.

1.Definition of co-nsistency

The consistency of custom lithium battery pack refers to the convergence of a group of important characteristic parameters of lithium batteries. It is a relative concept. There is no most consistent, only more consistent. For multiple strings of cells in the same battery pack, it is best for each parameter to be within a smaller range for better consistency.

Adding the time dimension, consistency refers to the consistency of all characteristic parameters of all cells in the battery pack throughout their life cycle, taking into account inconsistencies in capacity attenuation, internal resistance growth, and aging rates. The life of the entire battery pack is our ultimate focus on consistency.

The purpose of pursuing consistency is not only to maximize the capabilities of the custom lithium battery pack (including maximum power, maximum current, and maximum available capacity) in the current state, but also to maintain such capabilities for as long as possible.

2.The concept of inconsistency

Inconsistencies in custom lithium battery pack parameters mainly refer to inconsistencies in capacity, internal resistance, and open circuit voltage. The voltage is the initial voltage of the battery when assembled. The internal resistance is the AC internal resistance when fully charged, and the capacity is the discharge capacity of the battery cell after it is fully charged.

Accumulation occurs with the continuous charge and discharge cycles of the battery during use, resulting in greater differences in the status (SOC, voltage, etc.) of each individual battery;

The usage environment in the lithium battery pack also affects every single cell. This leads to the inconsistency of single cells gradually amplifying during use, which in some cases accelerates the degradation of the performance of some single cells, and ultimately causes premature failure of the lithium battery pack.

Supplement: SOC is used to describe the remaining power of the battery and is one of the important parameters during battery use. SOC estimation is the basis for judging whether the battery is overcharged or discharged.

The open circuit voltage of lithium batteries has a clear and monotonic correspondence with the battery’s charge. As long as the accurate open circuit voltage is obtained, the battery’s charge can be calculated.

Custom Lithium Battery Pack

3).Causes of inconsistency

The inconsistency of the custom lithium battery pack is a continuous accumulation process. The longer the time, the greater the difference between the single cells; and the custom lithium battery pack will also be affected by the use environment, and the single cells will be inconsistent in the future use process. The characteristics will be gradually amplified, causing the performance of some individual batteries to decline at an accelerated rate, and ultimately causing the battery to become useless.

The inconsistency of lithium battery packs is mainly affected by time. The reasons mainly include two aspects:

  1. First of all, there are process problems and uneven materials in the manufacturing process, which make the materials and materials of lithium batteries slightly different. After the lithium battery pack is put into use, the electrolyte density of each battery in the battery pack will have a difference. and temperature and ventilation conditions, self-discharge degree charging and discharging processes, etc.as well, there may be differences in capacity and internal resistance of batteries of the same model shipped from the same batch.
  2. When used in a vehicle, the electrolyte density, temperature and ventilation conditions, self-discharge degree and charging and discharging process of each battery in the lithium battery pack are affected by differences.

4). Scope of consistency evaluation

Personally, I understand that the consistency of all cells used as power, regardless of series or parallel relationship. Give a simple example.

Parallel connection situation

The battery cell with low discharge capacity (code B) is connected in parallel with other normal battery cells to form a parallel module D. For example, this module has 10 batteries connected in parallel. Each parallel module must provide the same current, such as 100A, to discharge the system. For other normal parallel modules, each battery discharges 10A; B can only discharge a maximum current of 1A, and the other 9 batteries each need to discharge 11A. Generally speaking, these cells will age faster than other parallel modules due to long-term overloading. One day, this parallel module’s overall maximum discharge capacity cannot reach the designed maximum capacity. This parallel battery pack has become a bottleneck in the discharge capacity of the entire battery pack.

Series connection

According to the general situation, the series connection relationship is mainly between modules. Continuing the previous plot of the parallel connection situation, there is a battery pack D that is more aged than other battery packs in the entire battery pack. D has a small capacity and a large internal resistance. Reflected on the curve between SOC and open circuit voltage, the open circuit voltage corresponding to the same SOC has a higher voltage at D terminal. When the entire battery pack is charged, D reaches the charging cut-off voltage first, and the battery pack stops charging. The other modules haven’t eaten enough, and he is already about to burst his belly, because it is getting smaller with age.

Therefore, cell consistency is not a matter within a module that is welded together, but is a requirement for all power batteries.

What hazards and problems will occur if the lithium battery pack is inconsistent?

Poor consistency may lead to uneven real-time voltage distribution of each battery cell during charging and discharging, causing overvoltage charging or undervoltage discharging, causing safety issues.

details as follows:

① Capacity loss. The cells form a custom lithium battery pack. The capacity conforms to the “barrel principle”. The capacity of the worst cell determines the capacity of the entire battery pack.

② Loss of life. If a small-capacity battery is fully discharged every time and the output is too strong, it is likely to reach the end of its life first. When the life of the battery core ends, a group of battery cores welded together will also end their life.

③The internal resistance increases. With different internal resistances, the same current flows, and the battery core with large internal resistance generates relatively more heat. If the battery temperature is too high, the degradation rate will be accelerated, and the internal resistance will further increase. Internal resistance and temperature rise form a pair of negative feedback, which accelerates the degradation of high internal resistance cells.

Lithium batteries use protective circuit systems during use to ensure safety. The intuitive performance of the consistency of lithium batteries during use is the difference in voltage consistency (voltage difference), and the detection of the protection system is based on voltage monitoring. When the voltage of one of the single cells reaches the protection condition, the battery circuit will be cut off, regardless of whether the other single cells are fully charged or discharged. After continuous charging and discharging, this difference will become larger and larger until the battery pack loses its use value. Safety issues can occur when combined with factors such as individual protection system failures or failures.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

18650 lithium ion battery pack 3S8P 11.1V 20Ah for petroleum exploration equipment

Petroleum exploration equipment is a portable field exploration equipment for petroleum geology and petroleum reserve sources. It can detect relevant geological layers at the surface level. Through advanced nuclear magnetic resonance core analysis, it uses the hydrogen nuclei of oil and water to have resonance in the magnetic field and Generate signal characteristics to detect rock physical properties to discover underground related petroleum sources and determine the content of petroleum reserves. Traditional outdoor power supply devices all use lead-acid batteries. Their shortcomings such as low energy density, large volume, and high quality add burden to explorers’ outdoor work. New 18650 lithium ion battery pack for petroleum exploration equipment have high energy ratio, light weight, small volume, and High cycle life, high safety, high voltage, good consistency and other advantages.


18650 battery pack 3S8P 11.1V 20Ah for field water quality monitor

The field water quality monitor is a portable water quality testing equipment that can conduct quality inspection of water resources and detect the degree of pollution of water quality. The main components of the instrument are small electric water pumps, mixers, heating devices, sensing parts, display parts, etc. The instantaneous current requirement for equipment startup is relatively large, with the peak current reaching 20A and the normal operating current being 4~5A. The requirements for continuous working time of the battery are relatively high. For this reason, our company uses imported batteries, which have high energy ratio, light weight, and With the advantages of small size, high cycle life, high safety, and high voltage consistency, the lithium battery pack is designed to output an overcurrent protection value of 30A, a continuous operating current of 7A, and a charge capacity of 20Ah, which fully meets the power needs of the instrument.

18650 Lithium Ion Battery Pack 14.8V


Custom lithium battery pack 32700 4S2P 25.6V 11Ah for track detection instrument

The exquisite aluminum alloy shell is designed according to customer requirements, and meets waterproof and shockproof requirements, as well as good heat dissipation requirements under high current operation.


Himax focus on 18650 lithium ion battery pack and 18650 Lithium Ion battery pack manufacturing for over 12 years. We can provide all kinds of custom lithium battery pack for customers. Please get in touch with us if you have demands.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

Introduction: The consistency of self-discharge is an important part of the influencing factors. Batteries with inconsistent self-discharge will have large SOC differences after being stored for a period of time, which will greatly affect its capacity and safety. Studying it will help improve the overall level of our custom lithium battery pack products, obtain a higher lifespan, and reduce the defective rate of products.

A battery containing a certain amount of electricity will lose part of its capacity after being stored at a certain temperature for a period of time. This is called self-discharge. To simply understand, self-discharge is the loss of battery capacity when it is not in use, such as the negative electrode’s power returning to the positive electrode or the battery’s power being lost through side reactions.

The importance of self-discharge

Custom lithium battery pack is currently used more and more widely in various digital devices such as notebooks, digital cameras, and digital camcorders. In addition, they also have broad prospects in automobiles, mobile base stations, energy storage power stations, etc. In this case, the use of batteries no longer appears individually as in mobile phones, but more in the form of battery packs connected in series or parallel.

The capacity and life of the battery pack are not only related to each individual battery, but also to the consistency between each battery. Poor consistency will greatly drag down the performance of the battery pack.

The consistency of self-discharge is an important part of the influencing factors. Custom lithium battery pack with inconsistent self-discharge will have large differences in SOC after being stored for a period of time, which will greatly affect its capacity and safety. Studying it will help improve the overall level of our battery packs, obtain a higher lifespan, and reduce the defective rate of products.

Make Custom Lithium Battery Pack



Self-discharge mechanism

The lithium cobalt graphite battery electrode reaction is as follows:

When the battery is open circuit, the above reaction does not occur, but the power will still decrease. This is mainly due to the self-discharge of the battery. The main causes of self-discharge are:

a. Internal electron leakage caused by local electron conduction in the electrolyte or other internal short circuits.

b. External electronic leakage caused by poor insulation of the battery seal or gasket or insufficient resistance between the external lead cases (external conductors, humidity).

c. Electrode/electrolyte reaction, such as corrosion of the anode or reduction of the cathode due to electrolyte and impurities.

d. Local decomposition of electrode active material.

e. Passivation of the electrode due to decomposition products (insoluble matter and adsorbed gas).

f. The electrode is mechanically worn or the resistance between the electrode and the current collector increases.

The self-discharge of metal impurities causes the aperture of the separator to be blocked, or even pierces the separator to cause a local short circuit, endangering the safety of the battery.

Self-discharge causes the SOC difference between batteries to increase and the battery pack capacity to decrease.

Due to the inconsistent self-discharge of the custom lithium battery pack, the SOC of the batteries in the battery pack will differ after storage, and the battery performance will decrease. Customers often find performance degradation after receiving a battery pack that has been stored for a period of time. When the SOC difference reaches about 20%, only 60% to 70% of the capacity of the combined battery remains.

Large differences in SOC can easily lead to overcharge and overdischarge of the battery.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
Lifepo4 Battery 12V

As technology becomes increasingly advanced, the demand for reliable and long-lasting battery power has also escalated. AGM replacement battery provides a cost-effective and efficient solution for devices that are experiencing poor battery performance or have become outdated due to technology advancements.

What is an AGM battery?

AGM (Absorbent Glass Mat) battery is a type of lead-acid battery that utilizes a unique separator technology. The separator is a fiberglass mat that is placed between the positive and negative plates of the battery. This mat absorbs the electrolyte solution, which allows for a thinner separator and more efficient energy storage.

AGM batteries are known for their high-cycle life, robustness, and ability to maintain their performance in adverse conditions. They are commonly used in applications that require reliable backup power, such as uninterruptible power supplies (UPS) and medical devices.

Why replace the battery?

There are several reasons why replacing an AGM battery is beneficial:

  1. Improved performance: AGM replacement battery typically offers improved performance over the original battery. They can provide higher capacities, longer runtimes, and faster charging capabilities.
  2. Extended lifecycle: AGMs are designed to last longer than standard lead-acid batteries. They can withstand a higher number of charge/discharge cycles, resulting in fewer battery replacements.
  3. Saving money: In some cases, replacing an AGM battery can be less expensive than purchasing a new device or upgrading to a higher-capacity battery.
  4. Environmentally friendly: AGMs are recyclable and contain no harmful substances, making them an environmentally responsible choice.
  5. Peace of mind: Knowing that your critical devices are backed up by a reliable power source can provide peace of mind during unexpected power outages or equipment failures.

12Volt 200Ah AGM Replacement Battery

How to choose an AGM replacement battery

When choosing an AGM replacement battery, it’s important to consider the following factors:

  1. Application: Determine the intended use of the battery and choose a model that meets the specific requirements. For example, a UPS may require a higher capacity and faster charging capability than a medical device.
  2. Voltage and capacity: Compare the voltage and capacity requirements of the device with the specifications of the replacement battery. Ensure that the new battery provides sufficient power for the device’s needs.
  3. Physical dimensions: Check the physical dimensions and mounting requirements of the device to ensure that the new battery can be installed and fit into the designated space without problems. Sometimes customized batteries or adapters may be required due to differences in size or specifications.
  4. Warranty: Consider the length and terms of the warranty offered by the manufacturer. A long warranty period can provide peace of mind in the event of battery failure.
  5. Price: Factor in the cost of the battery, including any additional features or services offered by the manufacturer, when making your decision. Cost-effectiveness is an important factor, but don’t compromise on quality and performance.

6.Reliable Manufacturer:Choose a reputable manufacturer with a track record of quality products and customer satisfaction. Check online reviews and research different brands before making your selection.

  1. Longevity: Choose a battery with a long expected lifespan to ensure that it will serve you for a considerable amount of time without requiring frequent replacements.
  2. Environmentally friendly: If environmental concerns are important to you, choose a battery that is recyclable and made from sustainable materials. This will help reduce waste and protect the planet.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

As the world transitions to a more sustainable and renewable energy future, the need for reliable and high-performing batteries has never been greater. Custom lithium battery pack is at the forefront of this emerging trend, providing a tailored solution for the diverse needs of the global energy market.

Custom lithium battery pack stands out from traditional battery technologies with its exceptional combination of power and longevity. Lithium-ion technology allows for smaller, more powerful battery cells that can store and release energy quickly while maintaining a long lifespan. This technology represents a significant advancement over traditional battery options, particularly in high-performance applications such as electric vehicles and grid-scale energy storage systems.

Custom lithium battery pack’s customizability is another key factor that sets it apart from the competition. With the ability to tailor battery packs to specific customer requirements, custom lithium battery packs can deliver the exact performance, capacity, and safety characteristics needed for a given application. This level of customization flexibility allows companies to innovate and iterate quickly, technology trends.

Custom Lithium Battery Pack

Moreover, custom lithium battery pack’s commitment to sustainability and environmental responsibility is another key factor distinguishing it in the market. The use of recyclable materials and closed-loop manufacturing processes minimizes the environmental impact of battery production while optimizing resource utilization. This not only reduces the carbon footprint of energy storage but also contributes to a more sustainable planet.

Looking ahead, custom lithium battery pack’s game-changing technology and customization capabilities position it well to support the global shift towards renewable energy. As the demand for electric vehicles and energy storage solutions continues to grow, Custom Lithium Battery Pack’s advanced technology and tailored solutions will play a critical role in meeting the world’s energy needs.

Custom lithium battery pack’s success is a testament to the company’s focus on innovation and customer satisfaction. With its commitment to excellence and a forward-thinking approach, custom lithium battery pack is poised to shape the future of energy storage and beyond.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com

The “EU Batteries and Waste Battery Regulations”(hereinafter referred to as the “New Battery Law”) officially came into effect on August 17. The new regulations will have a profound impact on all aspects of the entire life cycle of the battery industry chain including custom lithium battery pack design, production, and recycling in the EU.

Among them, the release of battery passport information has particularly attracted industry attention. According to the battery passport concept proof released by the Global Battery Alliance (GBA), product information has four important components: battery information (Battery), material information (Material), environmental social responsibility and corporate governance information (ESG), data source information (Data).

So, will the information required to be released by the battery passport bring intellectual property protection challenges to custom lithium battery pack design?

Extending to the impact on battery design, the application of battery passport will put forward new requirements for battery design; Will the battery cell design configuration in the European market tend to be diversified or more single; What changes can companies make on the R&D side to cope with this? Meet new challenges and seize new opportunities.

At the same time, the battery passport contains information about some manufacturing segments, which poses more challenges or opportunities for battery production; how equipment companies should help battery companies improve their carbon footprint is currently a hot topic in the industry.

Recently, Hu Ke, general manager of Elacode Europe, had an in-depth discussion and communication with Li Zhe, associate professor and doctoral supervisor of Tsinghua University, and Yang Rukun, chairman of Jiyang Intelligent, on the application of battery passports in the new battery law in the field of custom lithium battery pack design and battery manufacturing. This helps the industry gain a deeper understanding of the impact of battery passports on the industry and how companies can respond to future opportunities and challenges.

The impact of new battery law on battery design

Will the information required to be published in the battery passport bring intellectual property protection challenges to battery design?

According to several Pilot (verification) cases on battery passports given by GBA (Global Battery Alliance, International Battery Alliance), some information related to the design of battery packs and battery cells is indeed announced, such as the design of the entire battery pack. Energy grade, the quality of key metals used in them, etc.

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However, judging from the current three Pilot (verification) cases, the published information is relatively information that needs to be disclosed in the process of supplying battery cells or custom lithium battery pack to vehicle companies. The GBA Battery Passport does not require manufacturers to publish confidential information, such as trace amounts of metal doping, unique processes used in battery design and manufacturing, etc. Therefore, the current scope of battery passport disclosure will not affect the intellectual property protection of battery companies.

The Pilot sample of Battery Passport contains some battery performance information, such as cycle life, but some companies choose not to publish it. What are the reasons? Can share the latest research results of forward R&D and simulation-driven design in battery life prediction and failure analysis?

The issue of battery cycle life is a topic of great concern. In the case of the Battery Passport Pilot, Tesla is one of the few companies to announce battery cycle life. However, the cycle life figures it publishes are relatively low, even more so compared with the battery life figures claimed by some domestic vehicle companies. Much lower than the figures for energy storage batteries.

In fact, judging from the actual life of power batteries and energy storage batteries, the distribution range of cycle life is quite wide. A typical private car is charged and discharged twice a week, and its service life is about 10 years. In this case, the power battery is not required to have a cycle life of more than 5,000 times.

In contrast, energy storage batteries are required to have a cycle life of close to 7,000 to 12,000 times within a 10- or even 20-year warranty period. This wide range of life is mainly affected by the construction of the battery, the materials used, and key processes.However, many companies face specific pressures in practical applications, especially in energy storage batteries.

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The fiercely competitive energy storage market forces companies to seek breakthroughs in low-cost, long-life batteries. This has led to some high cycle life figures on the market, sometimes as high as 14,000 to 12,000 cycles. However, many companies have found that under laboratory conditions, There is a gap between observed longevity and user expectations.

As for why some companies choose not to publish performance information such as cycle life, firstly, there are currently no mandatory regulations. Secondly, it may depend on the promotion of battery passports among companies. To solve this problem, some solutions have emerged in the long-life battery design and manufacturing field.

Regarding the basic materials and formulas of batteries, there are already formulation solutions for long-life energy storage batteries. These solutions help increase the cycle life from two or three thousand times to the expected five or six thousand cycles of iron lithium. In addition, some new electrolytes, additives, lithium salts, and other solutions also provide more possibilities for custom lithium battery pack design and manufacturing. These solutions mainly involve using new additives, material selection, and process improvements.

In this process, modeling and simulation methods play an essential role in developing long-life batteries. Modern battery models can already simulate the internal aging mechanism of the battery so that the impact of materials, formulations, design, and manufacturing characteristics on life can be predicted from a mechanistic perspective.

In addition, reasonable modeling methods can reduce the need for long-life multiple-cycle experiments and accelerate the battery development process oriented to life indicators, thus significantly shortening the development cycle.

In short, the issue of battery cycle life involves the broad application of power and energy storage batteries, which differs from a single application requirement, making the cycle life distribution range wider. When enterprises face competition and market pressure, seeking long-life, low-cost battery solutions is critical. Modeling and simulation methods play an essential role in this process, accelerating the process of battery research and development.

What new requirements will the application of battery passport bring to battery design?

Battery passport requires disclosing battery materials, energy, life, and other information, which poses many challenges during the custom lithium battery pack design stage. To achieve goals such as vehicle driving range, it is necessary to increase the energy density of batteries under the constraints of quality and capacity, which is also the focus of enterprises. At the same time, the use of environmentally friendly materials and cost reduction are also design considerations, among which cobalt-free technology has become a representative innovation in the industry.

The European Battery Act has attracted widespread attention and requires the local recycling of battery materials, highlighting the importance of battery sustainability. This impacts battery material selection and manufacturing processes, requiring sustainability considerations to be considered throughout the entire life cycle. Batteries have a long life cycle, and sustainability needs to be viewed from design and manufacturing to multiple uses, disassembly, and recycling. For example, the welding and glue inside the battery are not friendly to disassembly, so design solutions for easy recycling will bring about design changes.

In addition to performance and cost, today’s businesses must consider sustainability an important metric. Launching the battery passport will increase the transparency of battery cell design and promote cooperation and experience sharing within the industry, thereby comprehensively considering energy efficiency, environmental impact, material sources, and life cycle management in the design and achieving a more sustainable battery design.

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Will the battery cell design configurations in the European market tend to be diversified or more uniform?

There has long been a structural controversy in the battery field, especially in large-scale batteries. People often hear discussions about the Unified Cell (unified cell) or 46 system. The area of energy storage batteries is relatively harmonious, with most batteries adopting a square winding hard shell system, especially the 71173 standard.

However, the diversity of structures is even more significant when it comes to power batteries. The structures of power batteries include square rolls, soft bags, blades cylinders, etc., with different shapes. Although the square roll configuration is still the mainstream, the other three structures also have their advantages. Especially for large cylindrical structures, such as the 46 series, the specifications continue to expand from 80, 95, 120, etc., and the capacity of a single battery develops from 3Ah to more than 30Ah or even higher. This structure is famous in the European market, and some OEMs support related power battery companies to create large cylindrical configurations.

The reason why the sizeable cylindrical configuration is popular is mainly reflected in two aspects: first, it continues the high efficiency of the winding production method; Secondly, when using the twisted cylindrical structure, it can better control the silicon content, The influence of factors such as high volume expansion materials on internal stress.

On the market, various configurations go hand in hand. Although some European and American companies have invested in Chinese power battery companies in the early stages, such as Volkswagen and Mercedes-Benz, there has yet to be a clear winner. Some companies have chosen soft-pack configurations, while others are moving towards large cylinders. Some companies have even proposed the concept of Unified Cell, which has the same appearance but different internal structure. This approach can reduce production diversity, such as coil production, casings, mechanical parts, etc.

To sum up, the choice of battery structure is still changing dynamically, and there is no clear winner yet. Similar to the situation in the Chinese market, this “let the bullets fly for a while” problem also exists in the European market. European and American companies’ investment and development strategies in Chinese battery companies and structure selection show that the market has not yet formed a clear consensus.

What changes can companies make on the R&D side to cope with new challenges and seize new opportunities?

The future development of the power battery industry will mainly focus on the two themes of reducing costs and improving efficiency. This is not a simple relationship from zero to one, but a process from one to one hundred about how to do better and faster based on the existing foundation. China is at the forefront in this regard, and the battery industry has entered a stage of high-quality development with an absolute size, slowing relative growth, but still full of vitality.

This also means the battery industry will maintain solid growth for some time. At this stage, accelerated development and cost reduction are crucial to the fate of the enterprise.

Among them, intelligent technology will bring revolutionary changes in the battery design and manufacturing field. Traditional battery design methods usually involve diverse sample preparation and testing processes, which wastes battery materials, staffing, and time.

Is there a new battery design method and corresponding design tools that can significantly shorten the design cycle from the traditional one year or even two years to a few weeks or months? A similar situation exists in battery manufacturing. Various wastes in the manufacturing process, such as yield issues, energy consumption, emissions, etc., must be addressed. Even when exploring new configurations, such as tab welding for large cylindrical batteries, long pole blades, etc., these problems still need to be faced.

Therefore, intelligent new design and manufacturing technologies will be the key to solving these challenges. From a design perspective, innovative technology can significantly shorten the design cycle and reduce waste. On the manufacturing side, intelligent technology can optimize factory management, improve production efficiency, reduce energy consumption and emissions, and even move towards the goal of green and zero-carbon factories.

In short, as China’s battery industry is about to enter a stage of high-quality development, intelligent technology will be a powerful tool to help companies accelerate growth and reduce costs. The introduction of this technology will have a positive impact in the field of battery design and manufacturing, pushing the industry towards a more efficient and sustainable direction.

The impact of the new battery law on battery manufacturing

The battery passport contains information about some manufacturing segments. Does it pose more challenges or opportunities for battery production?

The newly promulgated battery passport regulations, involving battery labels and manufacturing information, provide a situation where opportunities and challenges coexist. Implementing a battery passport will help standardize the entire battery manufacturing, use, and recycling process and improve the regulation and efficiency of battery use. This will help monitor various parameters during custom lithium battery pack use, improving battery quality. This will have positive significance for regulating and developing the entire industry.

Are there any obvious differences in carbon emission performance between the front, middle and back stages of battery production?

Carbon emissions are relatively evenly distributed among the front, middle, and rear sections. The energy consumption involved in the entire manufacturing process, such as heating, cooling, chemical formation, or liquid injection, consumes energy. The continuity of the battery manufacturing process, from material design to manufacturing process, requires the control of energy consumption. Therefore, achieving improvements in carbon footprint requires a concerted effort from both battery materials and manufacturing technologies.

Technical approaches to improve carbon footprint

Manufacturing technology has a significant impact on carbon footprint, especially in terms of improvements in manufacturing processes and processes. In a short time, energy consumption can be reduced by improving manufacturing processes and processes. At the same time, in the long term, it is necessary to optimize the entire manufacturing process, starting from the battery design and material system. For example, changing and optimizing the battery material system can reduce the energy consumption of the manufacturing process and thereby improve the carbon footprint.

The help and role of lithium battery equipment companies

From the perspective of custom lithium battery pack equipment manufacturers, equipment plays a vital role as executors and controllers in battery manufacturing. By establishing digital control and data systems, the equipment can help manufacturers optimize the manufacturing process and improve quality while also helping to solve the challenges of the new battery passport regulations.

If you have any question, please feel free to contact us:

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com