A team of engineers, chemists and materials scientists at Stanford University, has found that applying short duration voltage to some types of anodes in Li–Si batteries, can restore some of their capacity. In their paper published in the journal Science, the group describes how they experimented with batteries by applying an electrical charge to several types of silicon anodes.
Chengbin Jin and Xinyong Tao, both with Zhejiang University of Technology, in China, have published a Perspective piece in the same journal issue outlining the work done by the team.
It is common knowledge that lithium-ion batteries do not last very long. After multiple charge/recharge cycles, the batteries begin to hold less and less charge until they become of little use and replacement becomes necessary. Because of that, some battery makers have begun to look into the possibility of using silicon anodes.
This idea may grow in popularity since the team at Stanford has found that for some types of Li-ion batteries, giving them a five-minute burst of electricity directly to the anode can restore some capacity.
Batteries that have a silicon anode have a higher density than those made using other materials, which increases their capacity. Unfortunately, upon use, some of the silicon begins to fragment, which reduces capacity. This is because the fragmenting creates isolated chunks of silicon that are partly filled with lithium—they are like little islands, unusable for holding charge.
In this new study, the research team found that applying electricity directly to the anode pulled some of the isolated chunks back to the anode, making them able to hold a charge again. After testing anode charging, the researchers tested batteries that had pure silicon anodes. Applying electricity directly to their anodes led to some degree of restored capacity.
During their experiments, the researchers found that the more electricity they applied, the more capacity was restored, but there was a limit. Too much electricity led to degradation of the electrolyte. They also found that varying the length of time that voltage was applied had an impact on restoration of capacity. Eventually, they found that applying four volts for five minutes gave the best result—a 30% increase in capacity.
More information: Yufei Yang et al, Capacity recovery by transient voltage pulse in silicon-anode batteries, Science (2024). DOI: 10.1126/science.adn1749
Chengbin Jin et al, Electric pulses rejuvenate batteries, Science (2024). DOI: 10.1126/science.ads9691
Rechargeable aqueous zinc-iodine batteries get a lot of attention because they are safe, do not cost much, and have a high theoretical capacity. Zinc has a high theoretical capacity (820 mAh g-1) and iodine is found in large amounts in the Earth’s crust. However, the limited cycle life of zinc-iodine batteries remains a significant challenge for their market viability.
The thermodynamic instability of the zinc electrode in an aqueous electrolyte always leads to the release of hydrogen, which causes the battery to swell and eventually fail. In addition, in aqueous electrolytes, reversible redox reactions often occur at the iodine cathode, involving triiodide, iodide, and polyiodide (I3-/I-/I5-). The ZnO and Zn(OH)42- passivation layers may further interact with triiodide and exacerbate the adverse effects on the zinc anode. Therefore, mitigating these parasitic side reactions on the zinc surface is essential to achieve a long-life rechargeable ZnI2 battery.
The researchers reported a new class of fluorinated block copolymers as solid electrolytes for the development of all-solid-state ZnI2 batteries with extended lifespan. The results of the study suggest that the zinc metal anode circulating in this solid electrolyte forms a stable fluoride-rich SEI layer, which promotes the deposition of zinc in the horizontal direction and prevents the growth of harmful zinc dendrites that can damage the separator and cause battery failure.
In addition, this solid electrolyte effectively relieves the I3- shuttle problem extending the battery lifetime. Symmetrical cells assembled with this solid electrolyte are stably plated and stripped for about 5,000 hours at 0.2 mA cm-2. The complete ZnI2 battery has a longer rating of 0.5 C, impressive rate performance, and nearly 100% coulombic efficiency for more than 7,000 cycles (over 10,000 hours). The electrolyte exhibits excellent rate performance, delivering a reversible capacity of 79.8 mAh g-1 even at ultra-high current densities of 20 C.
These results highlight the great commercial potential of this all-solid-state battery. This study opens a new avenue for the design of fluorosolid-state polymer electrolytes for next-generation ZnI2 batteries with dendricity-free Zn metal anodes and ultra-long battery life.
Future research will explore more practical application scenarios of this battery while controlling costs. This solid-state ZnI2 battery featuring the solid perfluoropolyether (PFPE)-based polymer electrolyte demonstrates the formation of a solid electrolyte interphase (SEI) layer on zinc, promoting horizontal zinc growth, mitigating dendrite penetration, and enhancing battery cycle life.
Moreover, the solid electrolyte hinders the iodine ion shuttle effect, reducing zinc foil corrosion. Symmetric batteries employing this electrolyte demonstrate excellent cycle performance, maintaining stability for approximately 5,000 hours at room temperature, while solid-state ZnI2 batteries exhibit over 7,000 cycles with a capacity retention exceeding 72.2%.
This work offers a promising pathway to achieving reliable energy storage in solid-state ZnI2 batteries and introduces innovative concepts for flexible and wearable zinc batteries.
The research is published in the journal Materials Futures.
More information: Yongxin Huang et al, Enhancing Performance and Longevity of Solid-State Zinc-Iodine Batteries with Fluorine-Rich Solid Electrolyte Interphase, Materials Futures (2024). DOI: 10.1088/2752-5724/ad50f1
Provided by Songshan Lake Materials Laboratory
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There may be differences between primary and secondary batteries, so let’s introduce what primary and secondary batteries are
What is a primary battery?
As the name suggests, it is a battery that can only be used once. The battery converts chemical energy into electrical energy to provide power. The electrical energy cannot be replenished by charging or other means. Therefore, it cannot be used again after being fully discharged. The electrochemical reaction is irreversible.
Common carbon-zinc batteries, alkaline batteries, mercury batteries, etc. are all disposable batteries. Different disposable batteries have different uses, but they are all limited to single use. In manufacturing, the raw materials of many disposable batteries are polluting and have a considerable impact on the environment and human body.
What is a secondary battery?
Secondary batteries are reusable batteries that can be charged and discharged continuously. Secondary batteries are also converted from chemical energy to electrical energy. But they can be charged to convert electrical energy back into chemical energy, so that the battery can be used again. The number of times this type of battery is used is determined by the raw materials.
Common secondary batteries include lead-acid batteries, colloidal batteries, nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, lithium-ion polymer batteries, lithium iron phosphate batteries, etc. Different types of secondary batteries are used in different fields due to their rated voltage, rated capacity, operating temperature and safety.
We’re a professional battery pack manufacturer with 12 years of experience, major in lithium-ion battery pack, LiFePO4 battery pack, and Ni-MH battery pack. Our batteries are mainly sold to Europe, North America, Asia and Oceania. Our products have obtained various certifications such as CE, UL, CB, KC, IEC, UN38.3, etc. We can design different battery solutions according to customer needs.
After 12 years of continuous study and exploration, HIMAX has become a global-oriented multinational company integrating R&D and production, providing specialized and customized products. We are looking forward to be your battery partner. OEM & ODM are welcome.
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Your phone is about to go dead—again—and you can’t find a place to plug it in. Your laptop is getting hot…is the battery about to catch on fire? How far from home should you drive your electric vehicle? As scenarios like these become increasingly common, it’s clear that we need batteries that store more, last longer, and are safer to use. Fortunately, new battery technologies are coming our way.
Let’s take a look at a few:
1. NanoBolt lithium tungsten batteries
Working on battery anode materials, researchers at N1 Technologies, Inc. added tungsten and carbon multi-layered nanotubes that bond to the copper anode substrate and build up a web-like nano structure. That forms a huge surface for more ions to attach to during recharge and discharge cycles. That makes recharging the NanoBolt lithium tungsten battery faster, and it also stores more energy.
Nanotubes are ready to be cut to size for use in any Lithium Battery design.
Source: http://nanoboltbattery.com/
2. Zinc-manganese oxide batteries
How does a battery actually work? Investigating conventional assumptions, a team based at DOE’s Pacific Northwest National Laboratory found an unexpected chemical conversion reaction in a zinc-manganese oxide battery. If that process can be controlled, it can increase energy density in conventional batteries without increasing cost. That makes the zinc-manganese oxide battery a possible alternative to lithium-ion and lead-acid batteries, especially for large-scale energy storage to support the nation’s electricity grid.
Source: www.pnnl.gov
3. Organosilicon electrolyte batteries
A problem with lithium batteries is the danger of the electrolyte catching fire or exploding. Searching for something safer than the carbonate based solvent system in Li-ion batteries, University of Wisconson-Madison chemistry professors Robert Hamers and Robert West developed organosilicon (OS) based liquid solvents. The resulting electrolytes can be engineered at the molecular level for industrial, military, and consumer Li-ion battery markets.
Source: http://silatronix.com
4. Gold nanowire gel electrolyte batteries
Also seeking a better electrolyte for lithium ion batteries, researchers at the University of California, Irvine experimented with gels, which are not as combustible as liquids. They tried coating gold nanowires with manganese dioxide, then covering them with electrolyte gel. While nanowires are usually too delicate to use in batteries, these had become resilient. When the researchers charged the resulting electrode, they discovered that it went through 200,000 cycles without losing its ability to hold a charge. That compares to 6,000 cycles in a conventional battery.
Source: computerworld.com
5. TankTwo String Cell™ batteries
A barrier to the use of electric vehicles (EVs) is the slow recharging process. Seeking a way to turn hours into minutes, TankTwo looked at modularizing a battery. Their String Cell™ battery contains a collection of small independent self-organizing cells. Each string cell consists of plastic enclosure, covered with a conductive material that allows it to quickly and easily form contacts with others. An internal processing unit controls the connections in the electrochemical cell. To facilitate quick charging of an EV, the little balls contained in the battery are sucked out and swapped for recharged cells at the service station. At the station, the cells can be recharged at off-peak hours.
Source: http://www.tanktwo.com
For now, we may have to put up with phones going cold, laptops getting hot, and EVs not ranging far from home. Solutions seem to be on the horizon, however, so a better battery-powered future is within sight.
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With President Joe Biden in the White House, ink drying on a spate of new climate-focused executive orders and an extension of the federal Investment Tax Credit on the books, the immediate future looks relatively rosy for solar.
The U.S. Energy Information Administration anticipates that renewables will be the fastest-growing source of electricity through midcentury. While solar accounted for about 15 percent of renewable electricity generation in the U.S. in 2020, according to EIA, that will increase to nearly 50 percent by 2050. And solar will be the cheapest form of electricity across the United States by 2030, according to a recently released Wood Mackenzie report. The consultancy expects solar costs to decline 15 to 25 percent over the next ten years.
In a recent series for Squared, I cataloged some of the technological innovations that could define the next decade for solar. Here, I’ll dig into the macro trends Wood Mackenzie analysts expect to drive the resource’s next decade.
Costs will continue falling through 2030
In 2011, the Department of Energy launched its SunShot initiative, modeled after the moonshot effort of the mid-twentieth century, to “reduce the costs of solar energy and reestablish U.S. global leadership” in solar. A decade later, the U.S. has accomplished at least one of those goals; three years before DOE had targeted, SunShot successfully lowered utility-scale solar prices to its goal of $1 per watt.
Cost declines have been the most integral tool in allowing large-scale solar to grow. Worldwide, solar system prices fell by more than 80 percent from 2000 to 2010, according to WoodMac’s analysis.
Meanwhile, installations grew.
Although SunShot floundered under President Trump, prices kept falling in the U.S. Overall, prices for the engineering, procurement and construction of large-scale solar systems fell by more than 30 percent during Trump’s presidency, according to WoodMac.
That happened amid uncertain policy; the Biden administration’s support should provide more stability to the industry. WoodMac expects that costs will continue dropping. Solar is already competitive in a swath of the West and much of the Southeast. That trend will make its way into more of the Northeast by 2021 and the Mountain West by 2022. It will come for the frigid northern Midwest by mid-decade.
By 2030, solar will be the lowest-cost source of generation across the entire U.S.
Corporate purchases
Solar power’s downward price trajectory has caught the eye of corporate buyers. That’s a big market for renewables: Commercial and industrial electricity consumption accounted for more than 60 percent of electricity sales in 2019. And large companies have already become some of the most significant buyers of renewable electricity. In Q4 of 2020, these buyers accounted for 20 percent of the contracted pipeline for large-scale solar. In 2019, commercial solar installations grew 10 percent over the previous year, according to tracking from the Solar Energy Industries Association.
Analysts expect continued declines in the levelized cost of solar energy to strengthen that demand, which in turn has significant potential to reshape energy markets. After signing onto a growing slate of contracts tied to renewables projects, many companies are now looking for even more control of their electricity supply. A recent statement spearheaded by the Renewable Energy Buyers Alliance, a group with members including Facebook and General Motors, lays out the energy policies corporations hope to see advanced under the Biden-Harris administration. Their asks include expanding wholesale electricity markets to smooth the trading of electrons across regions. Some companies, such as Google, have already joined regional transmission organizations to gain more leverage in determining how those markets function.
The ability for solar to compete on price alone means that more merchant-centric projects could also be on the horizon, according to WoodMac. Most solar projects in the United States have relied on long-term, contracted revenue streams that last for at least a couple of decades. But as investors have become increasingly comfortable — perhaps too comfortable, some might say — with the structure of solar deals and the returns associated with the projects, shorter contracts have become more common.
“There’s definitely a lot of buzz in the market about the prospects of having merchant-based projects. But in the truest sense of the word, I don’t think there is a single [merchant solar] project yet,” said Ravi Manghani, WoodMac’s head of solar research. “Developers would need to come up with the right sort of hedging tools, whether these are physical tools like potentially storage, or financial tools, like hedges or insurance products. Those will have to become more commonplace as these projects start to be truly merchant.”
The role of storage and transmission
Cost declines have helped solar gain momentum. But overall, solar provided only about 2 percent of U.S. electricity in 2019. And if the resource is to grow significantly enough to meet clean energy mandates and climate goals set out by states and countries, it needs more support.
Energy storage is already being added to more utility-scale projects, and more projects are being designed to allow for its later addition, to help extend the hours in which solar projects can deliver electricity. Developers and asset owners such as Capital Dynamics have said storage is a consideration, if not the default, for every project.
“In the long run, as solar washes over the United States, storage follows along behind,” John Breckenridge, Capital Dynamics’ head of clean energy infrastructure, told Greentech Media this fall.
While storage will help balance uneven solar production, transmission is needed to carry it from where it’s most cost-effectively generated to where it’s most in demand.
Lack of transmission capacity has major potential to constrain solar growth, stymieing decarbonization efforts like those set out by the Biden-Harris administration. Already, experts and wonks are asking the new administration to confront that challenge. Clean energy groups supported by numerous past members of the Federal Energy Regulatory Commission highlighted that need in a report released this week.
“There is no climate plan that is serious if it does not anticipate a significant regional transmission upgrade,” said Pat Wood III, who served as FERC chair from 2001 to 2005, in an event spotlighting the report.
The administration appears to be paying attention to these issues already. An order President Biden signed this week urges the acceleration of federal permitting for transmission. And in a Wednesday Senate hearing on her nomination to head the Department of Energy, former Michigan Governor Jennifer Granholm named building out transmission to transport clean electricity as a “high priority” if she is confirmed.
“I’m very eager to work with FERC to get transmission lines established ASAP,” Granholm said Wednesday. “I feel like this is a conversation that’s been had for years, about having the right transmission lines in place to take power…(clean power especially) from places that are generating to the power and load centers.”
Aside from storage and transmission, which will make solar easier to use in more places and at more times of day, solar itself is becoming more efficient.
Bifacial solar, which allows for the absorption of sunlight on both sides of a panel, is perhaps the most significant solar technology improvement in recent years, or at least the one to become most mainstream. It’s already the default choice for numerous developers in the U.S.
The Section 201 exclusion that bifacial solar enjoyed for a time aided that development, though the exclusion was ultimately reversed by the Trump administration (solar groups are challenging the verdict).
Despite the policy confusion surrounding tariffs, analysts at Wood Mackenzie name bifacial among just a few technological innovations that are likely to boost solar production and help cut costs in the coming years. (Others are larger panels and wafer sizes, as I cover here, as well as improvements in solar trackers). Commercial bifacial solar modules offer production gains of 7 to 8 percent while costing not much more than single-sided panels. Analysts expect “the next decade will be marked by steady technological improvement along the entire solar value chain.”
“Every little improvement in generation or production means the capacity factor continues to go up, and that has direct implications in terms of the levelized cost,” said WoodMac’s Manghani.
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In today’s mobile world, standard lithium-ion batteries are used in a myriad of situations, and battery life comes to be precious. It can be especially annoying when a mobile device has to be charged in a public place with only one available outlet.
There are many reports on how to save battery power, but what can we do to extend battery life? Here are a few ways that Himax has you covered.
Keep the battery at room temperature
Store the battery between 20 to 25℃. During the charging process, the temperature of the battery will increase due to the electric current. Therefore, do not leave your battery in the car or charge it if the temperature inside the car is too high. Heat is the biggest factor in shortening the life of a lithium battery.
Consider purchasing a high-capacity rectangle lithium battery
Standard rectangular rechargeable batteries will degrade over time regardless of whether they are used or not. As a result, spare batteries will not last longer than batteries in use. When purchasing a battery, be sure to ask about the latest manufacturing date of the product.
Avoid completely discharging the lithium battery
If the discharge voltage of each cell of astandard lithium-ion battery falls below 2.5V, the safety circuit built into the battery will break, and the battery will appear to be depleted. For safety reasons, do not charge an over-discharged lithium-ion battery if it has been stored under these conditions.
If you are storing the lithium batteries for an extended period of time, store them at a storage charge in a cool place. Only by storing the battery properly can excessive power consumption be minimized and the life of the battery extended.
Stay tuned for more battery technology or visit Grepow’s Website now: https://www.grepow.com/
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Low-Temperature LiFePO4 Battery: Why It’s Best For RV
Like humans, batteries could function their best at room temperature. Low-temperature batteries like Lithium Iron Phosphate, like the LifePO4 Battery manufactured by Grepow, could be useful for RVs. These good batteries can work well in a temperature range of about –40℃ to 50℃. That’s why these batteries are ideal for RV application because these are specially-made, low-temperature batteries that are ideal for longer use in, particularly cold environments.
Perhaps you want to know deeper about what LiFePO4 Battery has to offer. In this article, you will understand how the low-temperature LifePO4 batteries work, and why it is ideal for any RVs. You will also know its features to help you understand this product.
Benefits of Using Low-Temperature LiFePO4 Batteries
When it comes to powering your RV, perhaps you want to consider Grepow’s Low-temperature LiFePO4 Batteries. Here are the benefits when you opt to use these kinds of batteries.
LiFePO4 batteries are safer and even more practical for low-temperature
It can be charged at temperature down to 0℃
It features proprietary technology which draws excellent power from the charger itself
The process of charging and heating is seamless for users
Internal heating and monitoring system are easy to process
Environmentally friendly and proven safe for use in any system
Customizable (Voltage, Capacity, Size, BMS)
Provides your RV a high energy density
The cycle life could reach thousands of cycles
LiFePO4 battery Features
Understanding your battery’s features is essential to know if it’s compatible with your RV. Check out the Grepow’s Low-Temperature LiFePO4 features to know how it delivers more power and longer life.
0.2C discharge at -20 to -40 degree temperature
Very good temperature resistance; the range of operating temperature is from -40℃to 50℃.
The discharge current at 0.2C is over 85% of initial capacity at -20℃, 85% at -30℃, around 55% at -40℃.
Has a higher capacity than other similar-sized lead-acid batteries.
A good drop-in replacement for lead-acid batteries
It comes with a longer life cycle compared to other lithium-ion batteries.
Can reach up to 2000 times life cycle
LiFePO4 battery Applications
One good thing about the Grepow’s LiFePO4 battery is that it can be used or applied to various equipment. It’s widely used in fields that require low-temperature applications like:
Medical Equipment
Drones/UAVs
Remote Controls for Passion and Hobbies
Industrial Applications
Powersports
Energy Storage (Home Solar, Outdoor, Marine)
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A nickel metal hydride (Ni-MH) battery is similar to a nickel cadmium (NiCd) battery, but it has higher capacity, less memory effect, and lower environmental pollution (or more simply, it doesn’t have the toxic cadmium) than the NiCd battery. Its recycling efficiency is better than that of lithium-ion batteries, and it is known as the most environmentally friendly battery.
The discharge performance of NiMH batteries can also meet the needs of most electronic products, and it is particularly suitable for products that require stable voltage over long discharge times.
High C-rate
Typically, high C-rate Ni-MH batteries can be charged at 1C and be fully charged in just over an hour. When discharged with a current of 5C, the median voltage of the battery can reach more than 1.24V and still discharge over 90% of its capacity.
Ni-MH batteries are efficient in their fast charging and high current-discharge performance, which makes them especially suitable for the high current discharge of electrical appliances, such as power tools, large toys (car toys, remote control aircraft) and so on.
Charging efficiency
The charging efficiency is the ratio of the capacity of a battery discharged under certain discharge conditions up to a certain cut-off voltage to the capacity of the battery input, which can be calculated according to the following formula:
the battery’s charging efficiency formula
Because the input energy is partially consumed in the side reaction to produce oxygen, the charging efficiency is affected by the charging rate and the environmental temperature. The charging current must be within a certain range when charging: if the current is too small or too large, the charging efficiency will be low.
High charge rate
A Ni-MH cell has many similar characteristics to its NiCd counterpart, and it also follows a similar discharge curve to that of the NiCd. However, the Ni-MH battery is intolerant of overcharging, which can result in reduced capacity.
In order to ensure the best battery life, 1C charging is the recommended charging rate. After fast charging, it is recommended to use 0.03-0.05C trickle charging to compensate for self-discharge and maintain battery capacity.
High discharge rate
Himax’s Ni-MH batteries can offer up to 2 times the C-rate of similarly sized, standard NiCd batteries. Due to their higher discharge rate and energy density characteristics, users can use Himax’s Ni-MH batteries in more powerful devices and applications.
The following picture is the discharge curve of :
UP43SC2000-15C Performance Measurement Data Plots
Here are some specifications of Himax Ni-MH battery:
There are three different series for Himax’s Ni-MH batteries that correspond to thor different discharge rates:
LP series, which stands for low power, means that the medium discharge rate is within a 5C rating. HP series stands for high power, and it has a discharge rating of 10C. Finally, the UP series, standing for ultra high power, has a discharge rate of 15C or more.
The above information comes from Himax, the manufacturer of Ni-MH, LiPO, and LiFe batteries. For more information, please further explore our blog or contact us at sales@himaxelectronics.com.
Batteries play a vital role in our lives. They are used to store electricity and power various electrical appliances. Especially lithium-ion batteries, they are used in a wide range and are often used in some small portable appliances, such as mobile phones. The battery is a consumable material, and it is often charged and discharged. No matter the battery is the best, it has a certain lifespan, and the price of lithium-ion batteries is higher than other batteries, so try to choose good quality lithium-ion batteries when buying, and the service life can be longer , Then how do we detect the quality of lithium-ion batteries?
How to detect the quality of lithium-ion batteries:
1. The fastest inspection method is to test the internal resistance and maximum discharge current. A good quality lithium ion battery has very small internal resistance and large maximum discharge current. Use a multimeter with a 20A range to directly short-circuit the two electrodes of the lithium-ion battery. The current should generally be about 10A, or even higher, and it can be maintained for a period of time. A relatively stable battery is a good battery.
2. Look at the appearance. The fullness of the appearance, such as a lithium-ion battery of about 2000mAh, is relatively large. The workmanship is fine or the packaging is fullness.
3. Look at the hardness. The middle part of the lithium-ion battery can be squeezed gently or moderately by hand. The hardness is moderate, and there is no soft squeezing feeling, which proves that the lithium battery is a relatively high-quality battery.
4. Look at the weight. Remove the outer packaging and feel whether the weight of the battery is heavy. If it is heavy, it is a high-quality battery.
5. During the live working process of the lithium-ion battery, if the two poles of the battery are not hot after continuous discharge for about 10 minutes, it proves that the battery protection board system is perfect. Generally, the quality of lithium-ion batteries with high-quality protection boards is better than ordinary lithium-ion batteries.
The service life of a good-quality lithium-ion battery is about two or three years. The non-durable performance of a lithium-ion battery is that the power consumption is very fast, and the charging time is reduced accordingly. In order to ensure the long-lasting use of lithium-ion batteries, pay attention to the protection of lithium-ion batteries, such as new batteries. Generally, the first three charges must be charged for 12 hours to activate the battery. Normally, you should also pay attention to it. There will always be a blind spot, which is to charge the mobile phone when it is completely dead. This idea is wrong. In order to protect the lithium-ion battery, try to charge the battery with half of the battery.
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Most energy storage systems, like UPS and solar energy storage, use lead-acid batteries, but more and more people are coming to use lithium iron phosphate batteries (LiFePO4) instead.
How does LiFePO4 replace Lead-acid batteries?
LiFePO4 batteries are compatible with lead-acid-battery equipment all the while having a higher discharge platform, volumetric specific capacity, and cycle life.
12.8V 7Ah Lead-acid battery
The nominal voltage of each cell of a lead-acid battery is 2.1V while the LiFePO4 is 3.2V.
To connect cells in series to form a 12V battery pack, lithium iron phosphate only needs 4 cells (3.2V x 4 = 12.8V) compared to the 6 cells of a lead-acid battery (2.1V x 6 = 12.6V). Already based on this knowledge, it is clear that lithium iron phosphate batteries are more advantageous than lead-acid batteries in terms of energy ratio, weight, and volume.
12.8V 7Ah Himax LiFePO4 modular battery
Each LiFePO4 Modular 12.8V battery can be set up in parallel or series in order to meet the needs of your current set up. For example, for a 48V setup, 4 cells of 12V should be hooked up in series. Simply remove the Lead-Acid Batteries and replace them with the Lithium iron phosphate Batteries and attach cables and secure the holding bracket.
Limitation of Lead-acid batteries
The charging efficiency of Lead-acid batteries is relatively low at 70% whereas the charging efficiency of LiFePo4 batteries can exceed 80% or even 90%. A lead-acid battery needs more energy for recharging, so a lot of energy is lost during the charging process.
Some other features of lead-acid batteries are as follows:
Fast or partial charges ruin a lead-acid battery
Charging times are long from 6 to 8 hours
An incorrect charger or setting reduces battery life
Poor maintenance will also reduce battery life
Other benefits of Lead-acid replacement batteries
Consistent voltage for a longer time
No more flickering lights or spotty performance. Lead-acid batteries can be unreliable for powering accessories at 50% or lower whereas Himax 12.8V LiFePO4 Lead-acid replacement batteries provide a constant output of energy all the way down to as little as 5% of its power.
Fast Charging
Lithium-ion batteries can be “fast” charged to 100% of their capacity. Normally, the LiFePo4 battery can be charged to 50% of its capacity in only 30 minutes. However, the Grepow lithium batteries with fast-charging technology can reach 100% of its capacity within 30 minutes; the maximum charging efficiency can go up to 3C for the charging rate.
Smart and Multi-connected battery
LiFePO4 batteries are equipped with a Battery Management System (BMS) board, and you can check on the State of Charge (SOC). More importantly, the 12.8V modular LiFePo4 battery allows for multiple connections, so you can connect batteries in series and parallel without an external BMS (max 4S10P; the maximum parameter is 51.2V and 70Ah). You can also assemble the battery into different structures and shapes to fit it into the available space of your device.
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