Four major application scenarios of PPS in the field of new energy vehicles

Himax - car charge Decorative pictures

As we all know, some new energy vehicles needs to be equipped with custom lithium battery pack. Let me introduce four major application scenarios of PPS in the field of new energy vehicles.

Polyphenylene sulfide (PPS) is an aromatic semi-crystalline special polymer. According to Market.US estimates, the global PPS market will exceed US$1.4 billion in 2022, of which automotive applications will account for more than 34%. By 2032 , the market size is predicted to reach US$3.3 billion, with the Asia-Pacific market share accounting for over 40% of the global market.

PPS has good thermal oxygen aging resistance and can ensure the stability of mechanical strength at extremely high temperatures. Parts made with PPS can work for a long time in harsh temperature environments without failure. It is an important polymer material in the field of new energy vehicles.The application scenarios of PPS in the area of new energy vehicles include explosion-proof custom lithium battery pack covers, busbars and terminal connectors in motor electric drive devices, electronic water pumps, electronic oil pumps, etc.

PPS special material application scenario 1: pole gasket on explosion-proof battery cover

The custom lithium battery pack explosion-proof cover has two functions. The first is to ensure stable charging and discharging – the resistance value is stable within the operating temperature range. In addition, safety needs to be ensured – the battery will fail due to high temperature, the custom lithium battery pack cover will rupture, and the pressure will be released to prevent explosion. PPS material is mainly used for plastic sheets on the positive and negative electrodes of custom lithium battery pack explosion-proof covers.

Custom Lithium Battery Pack 12V

Explosion-proof battery cover has overall requirements for pole gaskets:

  1. Excellent chemical resistance, especially corrosion resistance from battery pack fluid.
  2. Good bonding force between plastic and metal – the bonding force between aluminum pole and plastic is strong and stable;
  3. The thermal expansion coefficients of aluminum poles and plastics are close to each other.

Considering the above factors, PPS is the most suitable material for pole gaskets.

Positive post gasket (conductive PPS) functional requirements:

  • The resistance value is 10-10000 ohms. The smaller the resistance value fluctuation range, the better.
  • The pole will not sink during the laser welding process. The surface of the product does not bulge or collapse.
  • High and low temperature tests, the product does not crack.

Negative pole gasket (conductive PPS) functional requirements:

  • Withstand voltage value>1500V.
  • The pole will not sink during the laser welding process. The surface of the product does not bulge or collapse.
  • High and low temperature tests, the product does not crack.

PPS special material application scenario 2: electric drive system

The drive motor converts the battery’s electrical energy into mechanical energy and is the direct source of vehicle power. It mainly consists of a stator, a rotor, a casing, a connector, a resolver, etc. The key points of motor technology are the stator and the rotor.

Among them, connectors, stators, rotors and other components are the “specialties” of PPS modified plastics. In addition, the most critical core module of the inverter in the electronic control system: IGBT (Insulated Gate Bipolar Transistor) will also use PPS materials.

PPS has excellent comprehensive properties such as high mechanical strength, high temperature resistance, high flame retardancy, strong chemical resistance, flame retardancy, high crystallinity, good thermal stability, high mechanical strength, and excellent electrical properties, so many components can Saw PPS.

Specific application scenarios: copper busbar, BUSBAR, etc.

Specific application scenarios:

  • AC/DC bus
  • Motor terminal connector

Specific application scenario: IGBT module housing

Due to the long verification cycle and high technical and reliability requirements for automotive-grade IGBT modules, selecting appropriate IGBT module materials is also a critical step.

The electronic water pump consists of a pump casing, an impeller, a sealing ring, a motor casing, an electrical plug, a motor assembly, a bearing, a rotor, a controller, a controller base, a back cover, and fixing bolts.

The water pump casing is required to have strong bonding strength with metal, antifreeze resistance, high strength, high welding line strength (to avoid product cracking during storage), hydrolysis resistance, and the use of PPS material to meet its material requirements, injection molding, easy processing, and structural stability. Strong and not easily deformed.

The water pump impeller is made of PPS injection molding, which is characterized by high strength, flame retardant and high temperature resistance, high toughness, dimensional stability, and long service life. The water pump rotor is molded by PPS injection molding, which has the characteristics of high wear resistance and high strength.

Specific applications: electronic water pump housing, electronic water pump waterproof sleeve, electronic water pump impeller

Electronic water pump housing

The electronic water pump housing is constantly exposed to coolant and thermal circulation, so to ensure excellent strength, its material must have low moisture absorption and heat resistance.

Electronic water pump waterproof sleeve

Strict dimensional control and excellent surface appearance are the most important features of electronic water pump waterproof sleeves. These properties allow the baffle to withstand mechanical stress and exposure to glycol.

Electronic water pump impeller

Electronic water pump impellers must have excellent dimensional control accuracy, low moisture absorption and high mechanical strength to be continuously exposed to 140°C coolant for up to 2,000 hours.

As the core product of new energy vehicle electric drive technology, electronic oil pumps are mainly used for cooling the drive motor system to meet the more precise temperature control needs of hybrid vehicles and pure electric vehicles.

Special PPS material solutions for electronic oil pumps need to meet the performance requirements of electronic oil pumps such as high and low temperature resistance, chemical corrosion resistance, hydrolysis resistance, and high dimensional stability.

Summarize

In summary, PPS is widely used as a structural polymer material due to its excellent high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, excellent dimensional stability and excellent electrical properties. It has been successfully applied in new energy vehicles and other fields.

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

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
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18650 lithium-ion battery pack production process

18650-Li-Ion-Battery-4000mah

Let me introduce 18650 lithium-ion battery pack production process

(1) Bake

  • Baking for 12 hours under constant temperature and vacuum degree of -0.09MPa, the important purpose is to dry the moisture of the battery.

 

(2) Liquid injection

  • The battery cell after vacuum baking is injected into the glove box filled with Ar gas, the amount of liquid injection is different according to the design of the 18650 lithium ion battery pack. The battery should be weighed before and after injection, the weight difference is the amount of liquid injection, so as to judge whether the amount of liquid injection is appropriate.

 

(3) Welding pole lug

  • The positive pole lug (aluminum bar) and negative pole lug (nickel bar) are respectively welded in the scraping position of the positive and negative pole plates by ultrasonic welding machine. Pay attention to prevent welding deviation, welding dislocation, virtual welding.

 

(4) Bottom welding

  • First put the insulation gasket into the steel shell, then put the wound core into the steel shell, and weld the negative lug to the bottom of the steel shell with a spot welding machine. Check the outer surface of the bottom of the steel shell, pick out the bad appearance of yellow, black, defects, and fire, and try to pull the pole ear. Pick the 18650 lithium ion battery pack that is not well welded, such as fire, virtual welding, and de-welding.

18650 7.4v 2s1p 2600mah li ion lithium kc

(5) Seal

  • The steel shell and cap of the 18650 lithium ion battery pack are spot-welded with a spot welding machine, and then the laser welding machine is used for continuous laser welding. Laser welding should ensure that the positioning is accurate, the welding part is clean. It is strictly prohibited to cause deformation or damage to the battery, after welding inspection, welding holes, fire and other bad batteries.

 

(6) Winding

  • The ion exchange film is placed on the winding needle horizontally, and the end of the winding needle is extended 2-5mm. The four corners of the pole film cannot be creased, the pole film cannot drop material, the adhesive tape is slanted, the single-sided adhesive tape is too long, the double-sided adhesive tape is misaligned, the adhesive tape is not covered by the solder joint and other defects. The positive electrode material must hold the negative electrode material, the pole film cannot be rolled off, and the front end of the pole film must be inserted to the top.

 

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

Name: Dawn Zeng (Director)

E-mail address: sales@himaxelectronics.com

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Lithium battery for fire protection facilities

18650 Li ion Battery 4400mah 10.8v

Li ion customized battery packs have the advantages of high voltage, large specific energy, repeated charge and discharge, no memory effect, and no pollution, so they are more suitable for use as backup power sources in fire-fighting equipment.

Fire power supply is an important part of fire equipment. For a fire protection system, if there is no reliable fire power supply, the fire protection equipment cannot be started, the fire shutters and fire doors in the fire protection zone cannot be in place, the smoke exhaust system, fire elevators, fire lighting, etc. cannot work properly. Therefore, reliable fire power supply is the guarantee for the normal operation of fire protection equipment and provides power for the operation of all fire protection facilities in the building.

Li Ion Customized Battery Packs

Usually, we will first choose 18650 lithium ion battery pack and 26650 li ion battery pack, also LiFePO4 32700 battery pack to make fire power supplies. Because these custom lithium battery pack have a wide range of capacity options and are small in size, they can be easily made into battery packs of different sizes to adapt to different fire-fighting facilities.

We have already manufactured different kind of li ion customized battery packs for our customer, like 18650 battery pack 14.8V 17.5Ah, LiFePO4 12.8V 18Ah battery.

HIMAX can make all kinds of custom lithium battery pack and 12v Lead Acid Replacement Battery for our customers. We have full of confidence to meet your quality level. Looking forward to build a long term business with you and we wait for your kind respond

Contact Himax now to unlock your exclusive battery customization options, Himax offers a wide range of options and flexible customization services to meet the needs of different users.

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

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
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Li Ion Customized Battery Packs: Built for Individual Needs

LFP 6.4V

Li ion customized battery packs are designed to meet the needs of many devices whose battery packs have become a key component in the evolution of technology. Not only does it provide excellent performance, but it is also highly customizable, giving your device a whole new lease of life.

Customized to meet individual needs

The li ion customized battery packs are characterized by their highly personalized design. No matter how much power your device needs and how long it lasts, we can provide a battery pack that meets your needs. From miniature devices to large appliances, from smartphones to game consoles, our battery packs are easily adaptable. In addition, we also provide a variety of specifications of battery packs for you to choose, to meet your different needs.

High performance, long life

Li ion customized battery packs are made of high quality lithium-ion batteries with excellent energy density and long life. Our custom lithium battery pack undergo strict quality control and testing to ensure stable performance, safety and reliability. In addition, we offer an intelligent charge management system that can effectively extend battery life and reduce the risk of battery damage.

4S 14.8V Li Ion Customized Battery Packs

Safe design, worry-free use

Safety is the primary consideration of our products. Li ion customized battery pack is designed with fireproof materials and overheating protection to ensure that it will not cause any damage to the equipment in case of accidents. In addition, our battery packs are protected against overcharge, overdischarge and overcurrent to ensure the safety of the battery and equipment.

Fourth, fast delivery, quality service

We promise to deliver the battery pack to you in the shortest possible time. No matter where you are, as long as you need, we will be happy to serve you. In addition, we also provide high quality after-sales service, if you encounter any problems in the process of using, we will solve them as soon as possible.

All in all, li ion customized battery pack is a highly personalized battery pack that can meet your different usage needs, providing excellent performance and long life. Whether you are a professional or a regular user, we will provide you with the best service and product experience. Customize your own battery pack today and give your device a new lease of life!

 

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

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
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What is the main safety concern with lithium-ion batteries?

Himax Decorative Pictures - battery test

Are lithium batteries safe? Generally speaking, the problems of whether lithium batteries are safe are manifested as burning or even explosion. The root cause of these problems is the thermal runaway inside the battery. In addition, some external factors may also affect li ion customized battery packs and cause concerns about whether lithium batteries are safe, such as overcharging, fire, extrusion, puncture, short circuit, etc.

According to statistics, 68% of electric vehicle li ion customized battery packs fire accidents over the years were caused by internal or external short circuits, 15% were caused by charging and discharging, 7% were caused by accidental startup of equipment, and other reasons caused 10%.

From the perspective of the cause of the fire, electrical faults, and spontaneous combustion are the leading causes of fires in electric vehicles, while overcharging, battery cell failures, and short circuits in electrical circuits are the root causes of fires and bring the concern that our lithium batteries are safe.

48V Li Ion Customized Battery Packs

 

Which battery is the safest?

So, are li ion customized battery packs safe? The safety performance of lithium iron phosphate batteries will be higher than that of ternary lithium batteries. This is mainly because the heat resistance of lithium iron phosphate batteries is relatively good, and the thermal runaway temperature can reach more than 800℃.

The battery catches fire primarily due to factors such as short circuits, impact, and overcharging, which drives the concern of whether lithium batteries are safe. When the current passes through, a large amount of heat will appear in the overpotential and ohmic polarization, which will locally heat the battery to the temperature of the thermal decomposition of the cathode. The heat caused the battery to explode and catch fire.

The ignition point of the ternary lithium battery is only 200℃, and the ignition point of the lithium iron phosphate battery is 800℃. After an accident, the collision extrusion temperature can easily exceed the critical value.

In other words, lithium iron phosphate batteries will not spontaneously ignite if they do not reach 800℃. The ternary lithium battery is different. The thermal runaway temperature is basically around 200℃. Looking at the spontaneous combustion incidents of new energy vehicles, most of them are ternary lithium batteries. Therefore, for areas of hot weather, the risk of spontaneous combustion of ternary lithium batteries will be higher.

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

  • Name: Dawn Zeng (Director)
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Lithium battery electrode additive industry research

Custom lithium battery pack is mainly composed of electrolyte, separator, positive electrode material and negative electrode material. As one of the four key materials in lithium battery manufacturing, electrolyte is the medium for lithium ion migration and charge transfer, and is known as the “blood” of lithium batteries.

As an important component of custom lithium battery pack, electrolyte additives have a direct and significant impact on the performance of lithium batteries. Therefore, improving the functional role of electrolyte additives in lithium batteries is an important way to improve the performance of lithium batteries. 1. Electrolyte additive VC This additive has the characteristics of small dosage and significant effect. It can significantly improve the performance of lithium batteries without increasing production costs and changing the production process. In high-energy-density lithium iron phosphate batteries, electrolyte additives are used as auxiliary materials. They were previously added in small amounts and accounted for less than 8% of the electrolyte additive cost structure. The average market price of VC electrolyte additives fell.

The sharp increase in VC prices at the end of 2021 is due to the imbalance of supply and demand and the sudden increase in customer demand. As the capacity utilization rate of VC manufacturers increases, the supply side has increased. VC manufacturers may have stocked up before, but now they have shipped, so the price has dropped.

Electrolyte additive DTD

  • Introduction to DTD (vinyl sulfate)

DTD (vinyl sulfate) is a film-forming additive for SEI. The addition ratio of iron lithium is less than 1%, and the ternary addition ratio is less than 3%. At present, the preparation of DTD mainly uses sulfoxide chloride and ethylene glycol as raw materials.

  • Market size

Ternary batteries have higher energy density, but the disadvantage is poor thermal stability. DTD can improve the high-temperature cycle and high-temperature storage performance of the battery, and reduce battery expansion after being placed at high temperatures. Therefore, the research report believes that a higher proportion of DTD needs to be added to ternary batteries. DTD is a relatively new additive, mainly added to ternary lithium, but the proportion of lithium iron phosphate has exceeded that of ternary lithium. Therefore, the compound annual growth rate of DTD is still conservatively estimated at 20%.

  • DTD market price

Since 2018, the market supply of vinyl sulfate has increased, so the price of vinyl sulfate has dropped accordingly. The current unit price is about 230,000 yuan/ton.

The study predicts unit prices will fall by 10% annually. The price of ethylene sulfate continues to decline from 2019 to 2021. The main reasons are:

Improve the vinyl sulfate production process and reduce costs.

The top five battery electrolyte companies continue to deploy upstream raw materials, driving the price of ethylene sulfate downward.

The price of ethylene sulfate rebounded from January to March 2022. The price increased mainly due to the boom in the downstream electric vehicle industry and the tight supply and demand of upstream raw materials.

14.8V Custom Lithium Battery Pack

 

Scale of electrolyte additive industry

Industry development status quo

The development of global electrolyte additives is deeply affected by the development of the custom lithium battery pack industry. Major lithium battery producing countries have been affected to varying degrees, resulting in a slowdown in the growth rate of lithium battery production, which in turn affects the market demand for electrolyte additives.

Power batteries are the largest downstream application area for electrolyte additives. Benefiting from the development of the electric vehicle industry, my country’s demand for power batteries continues to grow, driving the development of lithium battery electrolytes.

China’s lithium battery electrolyte market continues to grow. The market size of electrolyte is proportionally related to the production of lithium batteries. The increase in demand for lithium batteries has driven the market size of electrolyte additives to continue to rise.

With the continuous expansion of the scale of the lithium battery industry and electric vehicles and the improvement of battery safety, cycle life and energy density requirements, more requirements have been put forward for electrolyte additives. Charge protection, improved low-temperature performance, etc. will gradually be enhanced.

Supply side

The global output of electrolyte additives is growing steadily, and Chinese companies are the absolute main force in the additive industry. In the future, new additive production capacity will largely depend on the expansion of Chinese companies. Among battery companies, Guangzhou Tyker Energy is a professional lithium battery seller.

Electrolyte additives replace risk factors

① Hydrogen battery

A hydrogen fuel cell is a battery that uses hydrogen element to store energy. Its basic principle is the reverse reaction of water electrolysis. Compared with lithium batteries, hydrogen fuel cells have the following advantages: low energy conversion consumption.

The hydrogenation speed is faster than the charging speed, which is more in line with the needs of long-term efficient transportation. It has no pollution to the environment and basically achieves zero carbon emissions.

However, hydrogen fuel cells are still in the early stages of industrialization, and there are still many problems to be solved:

  • The industrial chain is not yet mature and the cost is high.
  • It is difficult to build hydrogen refueling stations.
  • The construction cost of a hydrogen refueling station is generally more than three times that of a gas station, and is also higher than the construction cost of a charging station.
  • Hydrogen is a dangerous, flammable and explosive gas. Early construction, safety management and later maintenance are difficult. It may also pose certain threats to vehicle safety during use.

Hydrogen fuel cells have the advantages of long cruising range and short charging time. It is one of the directions for the industrialization development of automobile companies.

It is expected that after the industrialization of hydrogen fuel cells in 2030, hydrogen fuel cells will coexist with other batteries, and a combination of hydrogen fuel cells and lithium batteries may occur.

②Solid-state lithium-ion battery

A solid-state lithium-ion battery is a battery that uses solid electrodes and solid electrolytes. Compared with lithium batteries, solid-state lithium-ion batteries have the following advantages:

  • high energy density

Solid-state batteries directly use lithium metal as the negative electrode, which is light in weight and has high energy density, ensuring the durability of the vehicle.

  • small size

Solid electrolyte additives replace the separator and electrolyte additives of traditional lithium batteries, making the battery thin, small, and light.

  • High flexibility

The flexibility of solid-state batteries will also be significantly improved after thinning, ensuring that their performance does not decrease.

  • High safety factor

Solid electrolyte additives are non-flammable and moisture-proof, and the battery safety factor is higher than traditional lithium batteries. As the core component of electric vehicles, the energy density and scale of batteries directly determine the cruising range of electric vehicles.

High energy density solid-state lithium batteries have broad application prospects, but solid-state lithium batteries still have the following development resistance:

  • Low ionic conductivity

This blocks the movement of lithium ions between the positive and negative electrodes of the battery, resulting in reduced lithium ion transport speed and efficiency.

  • Poor interface contact

The contact area between the solid electrolyte additive and the positive and negative electrodes is small, the interface impedance is large, and the battery cycle life and rate performance are poor, resulting in slow charging speed.

  • expensive

Without a complete industrial chain to support commercialization, it is impossible to prepare large quantities of materials. Development is still relatively slow.

To sum up, hydrogen fuel cells and solid-state lithium-ion batteries have certain technical advantages. The world’s top 10 custom lithium battery pack companies and well-known car companies have made arrangements, and the development prospects are good. But it is limited by technical and cost pain points.

In the future, the battery industry is more likely to see technological parallelization. Consumer trends require future cars to be economical, safe and environmentally friendly. Both lithium batteries and fuel cells are deficient in their current supply. A combination of the two can complement each other.

14.8V Custom Lithium Battery Pack

Conclusion

Taken together, it is expected that the future market structure will be that liquid lithium-ion batteries coexist with other batteries, and each battery has its own application fields.

Liquid lithium-ion batteries are less likely to be replaced. Moreover, they are likely to maintain a considerable market space in the short term, and the market space for electrolyte additives such as VC and FEC will not be significantly compressed.

source:

https://www.tycorun.com/blogs/news/electrolyte-additive

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  • Name: Dawn Zeng (Director)
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Custom Lithium Battery Pack: Revolutionizing the Way We Store and Distribute Energy

Himax - 12v-8ah-Lithium-Ion

In today’s world, the demand for clean, efficient, and reliable energy sources is greater than ever. As the shift towards sustainable energy continues to gain momentum, new technologies are emerging that promise to revolutionize the way we store and distribute energy. One such technology is custom lithium battery pack.

Custom lithium battery pack, also known as CLBP, is at the forefront of a new generation of advanced lithium-ion battery technologies. CLBP’s unique design and materials make it one of the most promising energy storage solutions available today.

CLBP’s advanced lithium-ion technology provides unparalleled performance advantages over traditional battery solutions. These include a higher energy density, faster charging capabilities, and a longer lifespan. The ability to charge faster means that energy can be delivered more efficiently, while the longer lifespan reduces the frequency of battery replacements and associated waste.

CLBP’s customization capabilities are another key factor that sets it apart from other battery technologies. The ability to tailor battery packs to specific applications and devices means that CLBP can meet the unique requirements of a wide range of energy storage applications. This flexibility allows for a greater degree of innovation and creativity in the design and development of new energy storage solutions.
Custom Lithium Battery Pack 48V 300Ah 600Ah

CLBP’s impact on the energy storage market goes beyond its performance advantages. The technology’s ability to support the integration of renewable energy sources, such as solar and wind power, is revolutionizing the way we think about sustainable energy solutions. By providing a reliable and efficient means of storing energy generated from renewable sources, CLBP plays a crucial role in decarbonizing our energy system and achieving carbon neutrality.

CLBP’s development has been supported by significant research and development investment, which has enabled the technology to achieve commercial viability. The company’s commitment to innovation and continuous improvement has led to the development of a product that is reliable, efficient, and cost-effective.

As the world moves towards a more sustainable and renewable energy future, CLBP’s game-changing technology is poised to shape the future of energy storage and beyond. With its advanced lithium-ion technology, customization capabilities, and support for renewable energy integration, CLBP has the potential to revolutionize the way we store and distribute energy for decades to come.

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

  • Name: Dawn Zeng (Director)
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Li Ion Customized Battery Packs: Meeting Your Individual Needs

Himax - Solar street light battery

With the development of technology, our devices become more and more dependent on batteries. And the type and quality of batteries have a direct impact on our life and work. Li ion customized battery packs have been widely recognized as a company that focuses on customized battery pack solutions. Today, let’s learn more about this product.

Customized Design

Li ion customized battery packs provide customized battery pack solutions that can be tailored to the specific needs of our customers, with parameters such as battery type, capacity, and charging speed. We not only provide standardized products, but also welcome customers to put forward special requirements, and we will customize the design according to the needs to meet a variety of use scenarios.

High performance and long life

Li ion’s battery packs are made of high-quality lithium-ion batteries with high energy density, fast charging, and long life. The batteries we use undergo strict quality control and testing to ensure their stability and reliability in various environments and usage conditions. Meanwhile, our Battery Management System (BMS) can monitor the battery status in real time to ensure battery safety and extend battery life.

18650 3.7V 45Ah Li Ion Customized Battery Packs

Safety

Safety is the core element of li ion battery packs. We use an advanced battery management system to monitor the battery status in real time, predict the battery life, provide timely warning and take appropriate measures to prevent accidents. In addition, our products have gone through a number of safety tests, including overcharging, over-discharging, short-circuit and other extreme conditions to ensure product safety.

Environmentally Friendly Concept

Li ion customized battery packs are committed to the concept of environmental protection, and all of our products meet environmental standards. We use recyclable materials to manufacture our products and actively promote the circular economy. We also encourage our customers to recycle their batteries after use to minimize the impact of waste batteries on the environment.

Convenient after-sales service

Li ion customized battery packs provide a full range of after-sales services, including product consultation, technical support, maintenance and so on. Our customer service team is always ready to answer customers’ questions and provide professional advice. In addition, we also provide rapid response after-sales service to ensure that problems encountered by customers in the course of use can be resolved in a timely manner.

Summary:

Li ion customized battery pack is a battery pack solution that meets your individual needs. It offers customized design, high performance and long life lithium-ion batteries, comprehensive safety, environmental protection and convenient after-sales service. By choosing Li Ion, you will get a battery pack that is efficient, safe, environmentally friendly and customized to your needs.

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

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

Uses and advantages of 18650 lithium battery

18650-Li-Ion-Battery-4000mah

Theoretically, the 18650 lithium-ion battery can be recharged a thousand times. 18650 battery pack is widely used in various electronic fields, such as mobile power supplies, medical equipment, industrial instruments, various portable devices, and wireless data transmitters.

The reason why 18650 lithium ion battery pack is widely used in major electronic fields is due to its many advantages, such as the following:

1. large capacity.

in the same size, other types of battery capacity is basically about 800mAh, and 18650 lithium-ion battery capacity can reach 1200mAh to 3600mAh, if combined into a 18650 lithium-ion battery pack, then its capacity can exceed 5000mAh.

2. Long life.

The 18650 lithium-ion battery can be cycled a thousand times, then it can be used normally more than five hundred times, more than twice the service life of ordinary batteries.

3. High safety.

18650 lithium-ion battery has high safety performance, environmental protection and pollution-free, non-toxic, very good high temperature resistance, and will not burn or explode as easily as inferior batteries.

18650 Battery Pack 4400mAh 10.8V

4. The voltage.

The voltage of 18650 lithium-ion battery is relatively high compared with other types of batteries, and 18650 lithium-ion battery has no memory effect, so there is no need to charge and then charge after the charge, which can be used as it goes, which is very convenient.

5. The internal resistance.

The internal resistance of 18650 lithium-ion battery is very small, so the self-consumption of the battery is greatly reduced, so our equipment can extend the standby time.

 

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 need a power solution to your device.

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

  • Name: Dawn Zeng (Director)
  • E-mail address: sales@himaxelectronics.com
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The impact of low temperature on batteries and solutions

3.7 volt 5000mah li-ion battery

The use of li ion customized battery packs in low battery temperature environments is limited. In addition to the serious decline in discharge capacity, lithium batteries cannot be charged at low battery temperature. When charging at low battery temperature, the intercalation and lithium plating reactions of lithium ions on the graphite electrode of the battery exist simultaneously and compete with each other.

The diffusion of lithium ions in graphite is inhibited under low battery temperature conditions, and the conductivity of the electrolyte decreases, resulting in a decrease in the intercalation rate and the lithium plating reaction is more likely to occur on the graphite surface. The main reasons for the decline in the life of lithium-ion batteries when they are used at low battery temperature are the increase in internal impedance and the loss of capacity due to the precipitation of lithium ions.

1.Effect of low battery temperature on battery discharge capacity

Capacity is one of the most important parameters of lithium batteries, and its size varies with temperature. For AGM replacement battery, the charge end voltage is 3.65±0.05V, and the discharge end voltage is 2±0.05V. The two curves are the temperature capacity curves obtained by discharging the battery at different temperatures at 0.1C and 0.3C respectively.

2.Effect of low battery temperature on battery internal resistance

The relationship between li ion customized battery packs temperature and resistance is shown in the figure below. Different curves represent different charge levels of the battery itself. Under any charge, the internal resistance of the battery increases significantly as the temperature decreases. The lower the charge, the greater the internal resistance, and this trend remains unchanged as the temperature changes.

At low battery temperature, in the cathode and anode materials, the diffusion and movement ability of charged ions becomes poor, and it becomes difficult to pass through the passivation film between the electrode and the electrolyte. The speed of transfer in the electrolyte is also reduced, and a lot of heat is additionally generated during the transfer.

After lithium ions reach the anode, the diffusion inside the anode material also becomes unsmooth. During the whole process, the movement of charged ions becomes very difficult. From the outside, it means that the internal resistance of the battery cell has increased.

3. Effect of low battery temperature on battery charge and discharge efficiency

The lower curve is the curve of charging efficiency changing with temperature. We can observe that the charging efficiency at -20°C is only 65% of that at 15°C.

The low battery temperature brings about the changes in the various electrochemical performances described above, and the internal resistance increases significantly. During the discharge process, a large amount of electric energy is consumed on the internal resistance to generate heat.

Li Ion Customized Battery Packs

4. Internal side reactions of lithium-ion batteries at low battery temperatures

The performance of li ion customized battery packs degrades severely at low battery temperatures, and some side reactions will occur during the charging and discharging process of lithium-ion batteries. These side reactions are mainly the irreversible reaction between lithium ions and the electrolyte, which will cause the capacity of the lithium battery to decline and further deteriorate the battery performance.

The consumption of conductive active material causes capacity fading. Considering the potentials of the cathode and anode in the battery, these side reactions are more likely to occur on the anode side than the cathode side. Because the potential of the anode material is much lower than that of the cathode material, the deposits of side reactions of ions and electrolyte solvents are deposited on the electrode surface, forming an SEI film. The impedance of the SEI film is one of the factors that cause the overpotential of the anode reaction.

When the battery is further cycled and aged, due to the continuous insertion and extraction of lithium ions on the anode during continuous cycles, the expansion and contraction of the electrode caused by the continuous cycle will cause the SEI film to rupture. The cracks after the rupture of the SEI film provide a direct contact channel between the electrolyte and the electrode, thereby forming a new SEI film to fill the crack and increase the thickness of the SEI film.

These reaction processes are constantly repeated as the battery is continuously charged and discharged, so that lithium ions are continuously reduced in the reaction, resulting in a decline in the discharge capacity of the lithium-ion battery.

During charging, deposits form on the surface of the active material, increasing the electrical resistance. The effective surface area of the active particles is reduced and the ionic resistance is increased. The usable capacity and energy of lithium batteries decline simultaneously. Lithium batteries are more prone to side reactions during charging.

At the beginning of lithium battery charging, lithium ions move to the anode through the electrolyte, so the potential difference between the electrode and the electrolyte decreases, making it easier for lithium ions to undergo irreversible side reactions with the substances in the electrolyte. The different electrode materials of lithium-ion batteries have different relationship curves between the potential and the lithium intercalation concentration fraction of the electrode material.

18650 7.4V 2S1P 2600mAh Li Ion Customized Battery Packs

Lithium battery low temperature preheating technology

Faced with the limited use of lithium batteries at low battery temperature, the technicians found a countermeasure to charge and preheat. Although it is an expedient measure, it has a significant effect on improving the discharge capacity and long-term life of lithium batteries.

Before charging or using a lithium battery in a low battery temperature environment, the battery must be preheated. The way the battery management system (BMS) heats the battery can be roughly divided into two categories: external heating and internal heating.

Compared with external heating methods, internal heating avoids long-path heat conduction and the formation of local hot spots close to the heating device. Therefore, internal heating can heat the battery more uniformly for better heating with higher efficiency and is easier to implement.

At present, most of the research on the internal AC preheating scheme focuses on the heating speed and efficiency, and there is little clear consideration of the heating strategy to prevent the occurrence of side reactions such as lithium deposition.

In order to prevent the generation of lithium deposition during the preheating process, it is necessary for the BMS to estimate and control the conditions of lithium deposition in real time. A model-based controlled battery heating technique at low battery temperature is required to achieve the above functions.

With the development of new energy, the use of power li ion customized battery packs is also increasing day by day. The use of lithium batteries at low battery temperature urgently needs to solve the problem of battery warm-up. This is a field that is very close to practical applications. In addition, AC heating, mobilizing electrochemical substances to generate movement, and the impact on battery life have not yet been seen. It is also a problem worthy of continuous attention.

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

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