LFP Battery Cell Advantage
LFP Battery Cell, also known as Lithium Iron Phosphate (LiFePo4), is an excellent and safe battery cell with a few advantages:
- Long cycle life: capable of more than 5000 cycles with a shelf life of more than 10 years.
- Environmentally friendly: free of toxic substances such as lead and other heavy metals.
- High safety: LFP cells will not cause fire or explosion due to over-charging and over-discharging.
- Lightweight: LFP cells are 1/3 of the weight of lead-acid batteries.
What Is LFP Battery Cell?
Keheng is an LFP Battery Cell manufacturer that produces Lithium Iron Phosphate (LiFePO4) batteries as an alternative to lead acid batteries.
Keheng, as an LPF Battery Cell manufacturer, produces the safest Lithium Iron Phosphate (LiFePo4) battery packs, which is the optimal solution for energy storage, power, medical, industrial, and commercial applications with its high safety, long cycle life, and no memory effect. We provide 18650, 21700, and 32650 LFP battery cell customized to meet your specific needs, and also can customize voltage, capacity, shell or round, prismatic cells.
Contact keheng for the latest information about LFP battery Cells!
Lifepo4 Cylindrical battery cells
Keheng’s 14500 3.7v 800mah cylindrical lithium-ion rechargeable battery cell.
Keheng customizes LFP battery cells for different usage scenarios according to customers’ needs to give you a wider range of choices.
Best price rechargeable 3.2v 3400mah、4000mah、5000mah 26550 Battery for flashlight
We customize different voltage cells for golf carts including 12V, 24V, and 36V to meet specific needs.
Keheng as a LFP battery cell manufacturer produces different capacity cells including 50Ah, 200Ah, 300Ah, 500Ah and so on.
Used in all kinds of remote areas for UPS backup power, including remote sea base stations, no man’s land, cameras, etc.
Lifepo4 Prismatic Battery Cells
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3.2v 100ah lifepo4 battery cells -
3.2v 230ah lifepo4 prismatic cells -
3.2v 304ah lifepo4 battery cell -
3.2v 280ah lifepo4 battery cell -
3.2v 50ah lifepo4 battery cell -
3.2v 60ah lifepo4 battery cells -
3.2v 80ah lifepo4 battery cell -
3.2v 180ah lifepo4 cell
Lithium iron phosphate battery characteristic curve
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Rate discharge curve -
Temperature discharge curve -
Charge state curve -
Cycle life curve -
Self-discharge curve
Why Choose Keheng Customized LFP battery Cell?
Requirements are determined based on the customer’s needs to understand the desired usage scenarios.
Match the required cell materials to the needs to improve performance.
Match the cell mix to the material to reduce cost.
Match cells to customer’s needs to meet final requirements
Keheng Is Committed To Transforming LFP Battery Cells
As a lithium battery manufacturer, we have been committed to researching and manufacturing high-quality cells. Meanwhile, keheng provides round 14500, 18650, 21700, 26650, 32650 (32700) cells and prismatic cells for customers to choose from for different needs to meet the final standard. Meanwhile, we have more than 15 years of experience in providing battery packs composed of LFP cells for various industries such as industrial and commercial energy storage, home energy storage, power batteries, etc. to ensure that the battery packs can meet your needs. Meanwhile, our products are certified by MSDS, UN38.3, CE, UL, KC, BIS, CB, and ISO9001:2015.
Let keheng protect your products!
Benefits Of Our LFP Battery Pack Customization
When you need to use lithium batteries in the production of your products then lithium batteries made up of LFP cells will be your best choice, we are one of the suppliers of LFP battery cells because we provide them to our customers:
1. Professional designers: professional designers customize the battery lines, cells, etc. through customer needs.
2. Professional quality inspectors: products are tested to ensure that they meet the ideal needs of customers.
3. Professional after-sales team: We provide 7*24 hours after-sales service for our customers and also support 10 years warranty.
There are four main materials used in the production of lithium iron phosphate batteries: positive electrode materials, negative electrode materials, electrolytes, and diaphragm.
1. Among the cathode materials, the most commonly used materials are lithium cobaltate, lithium manganate, lithium iron phosphate, and ternary materials (nickel-cobalt-manganese polymer). Positive electrode materials occupy a large proportion (the mass ratio of positive and negative electrode materials is 3:1~4:1), because the performance of positive electrode materials directly affects the performance of lithium battery packs, and its cost directly determines the cost of the battery.
2. Among the anode materials, the current anode materials are mainly based on natural graphite and artificial graphite. As one of the four main materials of lithium iron phosphate battery pack, negative electrode material plays an important role in improving the capacity and cycle performance of the battery and is in the core link of the middle reaches of the lithium battery industry.
3. Marketed diaphragm materials are mainly polyolefin diaphragms mainly made of polyethylene and polypropylene. In the structure of a lithium battery, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure of the battery, internal resistance, etc., which directly affects the capacity of lithium battery packs, cycle and safety performance, and other characteristics, excellent performance of the diaphragm improves the overall performance of the battery has an important role.
4. Electrolyte is generally made of high-purity organic solvents, electrolyte lithium salt, the necessary additives, and other raw materials, under certain conditions, according to a certain proportion of the preparation. Electrolytes in lithium batteries between the positive and negative electrodes play a role in conducting ions, is the lithium iron phosphate battery obtains high voltage, high specific energy, and other advantages of the guarantee.
Pros:
- High safety: compared with other lithium-ion batteries, lithium iron phosphate batteries are safer and less likely to explode and catch fire. This is because the chemical properties of lithium iron phosphate cathode materials are stable and not prone to chemical reactions.
- Long life: Lithium-iron phosphate batteries have a long cycle life and can be charged and discharged thousands of times for a longer service life.
- Can withstand high temperature: lithium iron phosphate batteries perform better than other lithium-ion batteries in high-temperature environments, and are less likely to be damaged and degraded.
Cons:
- Lower energy density: lithium iron phosphate batteries have a lower energy density than other lithium-ion batteries, meaning that they can store less power at the same weight and volume.
- Slow charging speed: Lithium Iron Phosphate batteries are slower to charge compared to other lithium-ion batteries, requiring longer charging times.
Because lithium iron phosphate positive material discharges at about 3.3V, and graphite forms the negative electrode, then after assembling into a battery, the nominal voltage of the battery is 3.2V, the float voltage is 3.65V, and the cut-off voltage is 2.5V.
If lithium precipitation occurs in the battery, there is a high probability that the design has caused redundancy.
When a LiFePO4 battery is fully charged, all the lithium ions are shifted to the negative electrode, and will not cause overcharging during a long float charge. Therefore, it is very likely that the redundancy is caused by the usual power battery design being made according to the 1C capacity, which is likely to cause the negative electrode redundancy to be insufficient, and then in the long-term float charging conditions, all the capacity of LiFePO4 will be released, resulting in overcharging.
| Lithium Iron Phosphate | Lithium Manganate | |
|---|---|---|
| Cycle Life | 2000 | 1000 |
| Voltage | 3.2V | 3.7V |
| 18650pcs | 2ah | 3.3ah |
| Working Voltage | 2.5~3.65V | 2.75~4.2V |
| Advantage | Better safety, good high temperature performance, non-toxic and non-polluting | Low cost, no pollution, higher safety, good multiplier performance |
| Disadvantages | Not cheap, poor low-temperature performance | Poor temperature performance, low cycle life is relatively short; less stable material |
Due to the weak power storage capacity of lithium manganese acid battery cores lithium titanate battery cores and flammable and explosive lithium cobalt acid battery cores are gradually abandoned over time, ternary lithium and lithium iron phosphate occupy the big head of outdoor energy storage.
Lithium iron phosphate by a higher melting point than lithium ternary, lithium iron phosphate core security is better.
- The cycle life of lithium iron phosphate reaches about 5,000 times, twice as long as lithium ternary.
- At a temperature of -20 ℃, the capacity of lithium iron phosphate can also maintain 60% of the power, due to the general outdoor power supply at ultra-low temperatures.
- Electricity Xiaoyi (Jackery), Zhenghao Technology (Ecoflow), and Platinum Lu Di (BLUETTI) using lithium ternary battery cells, in terms of safety and user experience have made great improvements, but the number of charge and discharge cycles is about 800 times.
- With the lithium iron phosphate batteries more and more recognized by consumers, Yubo, Ningde Times, millet, Keheng, and other technology companies have entered this track, launching lithium iron phosphate battery outdoor power. Lithium iron phosphate batteries play an indispensable role in terms of safety and cycle life.
Lithium iron phosphate (lfp) cells have an open-circuit voltage plateau period in the 15%-95% SOC interval, i.e., in this interval, the open-circuit voltage (OCV) varies less with SOC. The battery consistency is usually based on the voltage difference for active or passive equalization. lfp in the platform period, even if the SOC of the two series-connected batteries has a large difference, the voltage difference is not obvious, and it can not trigger the active/passive equalization, coupled with the cumulative error of the ampere-time integral estimation of the SOC, which ultimately leads to the poor consistency of the SOC of the series-connected lfp.
The role of capacitorization process:
Capacity separation of cells can better facilitate the stabilization of SEI film, and at the same time reduce energy consumption and increase production capacity. The main purpose of capacitance separation is to categorize the products, so that cells with the same internal resistance and capacity can be combined to form a battery pack, and only those with similar performance can form a battery pack.
Impact of Capacity on Battery Consistency:
Capacitation can pick out the capacity inconsistency cell, to prevent the impact of inconsistency after the output is assembled. To prevent overcharging and over-discharging of the battery, the logic of the battery management system is set up in this way: when discharging, when the lowest cell voltage reaches the discharge cut-off voltage, the whole battery pack stops discharging; when charging, when the highest cell voltage touches the charging cut-off voltage, charging stops.
For example, two batteries with a battery capacity of C, the other capacity of 0.9C, through the series connection of battery packs, the charging of 0.9C of the first full of batteries to reach the charging cut-off conditions, then stop charging for a long time, the discharge is the same principle, 0.9C end of the discharge, the end of the battery pack discharged. In this way, the small capacity of the battery cell is always full discharge, but the large capacity of the battery cell has been using part of the capacity. There is always a part of the capacity of the whole battery pack in an idle state.
On the iron phosphate hammer why there are still cases of spontaneous combustion, spontaneous combustion needs to be met at the same time (combustible + to reach the ignition point + combustion aids) lithium iron phosphate battery materials are inert, while the ignition point of lithium iron phosphate is higher, so lithium iron phosphate batteries flammability is minimal.
The ignition point of lithium iron phosphate is 500 ℃, if you need to replace the lithium iron phosphate battery then you need to choose the solid-state battery, A solid-state battery reduces combustibles, from the fundamental mountain to solve the battery combustibles, the electrolyte will be switched to a non-combustible, chemically stable and high solid-state electrolyte.
Solid state electrolyte is mainly divided into polymer solid-state electrolytes, oxygenate solid-state electrolytes and sulfide solid-state electrolytes. Whether it is that kind of solid-state battery, there is still a need to improve the conductivity, to solve the interface impedance of these two materials’ performance-related core problems, are still a long time before they can be used in practice.
The reason should be that the battery is not activated, each cycle is equivalent to activation, so the capacity will become larger and larger.