Wide operating temperature range, from -40℃ to 55℃; (3) Can be charged at low temperatureLithium iron phosphate batteryat -20 ℃ according to the discharge cycle test curve of 0.2C, after 300 cycles, there is still a rate capacity retention of more than 93%.
(1) Low current charging and discharging
The use in this case is mainly used in 3C electronic products. In this field, iron phosphate is used for lithium batteries. are used normally, if they are from a relatively strong battery brand manufacturer and are of good quality, they will basically have a lifespan of more than 2,000 times; small, low-grade lithium battery manufacturers will also have a lifespan of more than 1,000; times.
(2) Use of high-rate stable charge and discharge
Most high-rate discharge applicationsébit are electric type lithium batteries, and most of them are used in applications that power motors, such as new energy vehicles, electric vehicles, electromechanical power supplies for fishing boats, etc. Since most lithium iron phosphate batteries operate under high load conditions, the decomposition time of the battery material is accelerated.
The lifespan of the cycle has decreased significantly. A poor quality battery can only last about 500 cycles; a strong lithium iron phosphate battery manufacturer will be better in terms of equipment technology and material application. will be better, but the lifespan will only be about 800 times.
I think the lithium iron phosphate battery used in this case will have a shorter lifespan and will be almost useless after about 300 times. Unstable discharge during useBattery usage, sometimes high and sometimes low, will have a greater effect on battery degradation.
How does the low temperature environment impact batteries?
According to expert research: using lithium batteries in low temperature environments for a short time, or when the temperature is not low enough, will only temporarily affect the capacity lithium-ion batteries, but will not cause permanent damage. However, if used for a long time in a low temperature environment or in an ultra-low temperature environment of -40°C, the lithium-ion battery may be "frozen" and cause permanent damage.
In addition, charging lithium-ion batteries at low temperatures will precipitate metallic lithium on the surface of the battery anode, and this process is irreversible. This will cause permanent damage to thebattery and would reduce battery safety. Therefore, many lithium battery equipment has protection devices that prevent charging at low temperatures.
For reference.
Will the battery be damaged by freezing?
Of all environmental factors, temperature has the greatest impact on battery charging and discharging performance. The electrochemical reaction at the electrode/electrolyte interface is linked to the ambient temperature. like a lithium battery core.
If the temperature decreases, the reaction speed of the electrode also decreases. Assuming the battery voltage remains constant and the discharge current decreases, the battery output power will also decrease. If the temperature increases, the opposite is true, that is, the battery output power will increase and the temperature also affects the transmission speed of the battery.ectrolyte. As the temperature increases, it will speed up and the transmission temperature will decrease. the transmission will slow down., the charging and discharging performance of lithium batteries will also be affected.
But if the temperature is too high, it will destroy the chemical balance of the battery and cause side reactions. The discharge efficiency of nickel-cadmium, nickel-metal hydride and lithium batteries will be significantly reduced at low temperatures (e.g. below -15, the lye reaches the freezing point and the battery charging speed will also be considerably). reduced.
Charging at low temperatures below 0 will increase the internal pressure of the battery and possibly open the safety valve. In order to charge effectively, the ambient temperature range should be between 0 degrees and 28 degrees. Generally, the charging efficiency increases with the increaseation the temperature, but when the temperature exceeds 45, the performance of the rechargeable lithium battery materials is high. temperatures will worsen and battery life will also be significantly shortened.
The battery will be damaged by freezing.
A low temperature environment will affect the capacity of the mobile power supply but will not cause permanent damage. This is intended for situations where it is not used in a low temperature environment for a long time, or the temperature is not high. Quite low. If used for a long time in a low temperature environment or in an ultra-low temperature environment of -40°C, the mobile power supply will be "frozen" and cause permanent damage.
Theoretically, lithium-ion batteries cannot be charged in an environment where the temperature is below 0°C. Although this has notIf there is no short-term effect, lithium batteries will always precipitate metallic lithium on the surface of the anode. And this process is irreversible. Therefore, repeated charging at low temperatures will damage the battery and reduce its safety, especially when compressed and impacted by the outside world.
If you want to avoid this phenomenon, you can only avoid using mobile power at extremely low temperatures and reduce the use time of mobile power in low temperature environments .
Detailed information:
The phenomenon of automatic shutdown due to low temperature is related to the cell phone battery problem It is related to the working principle. To measure the power of a cell phone, you need to measure voltage and current. The cell phone battery is a chemical battery that requires certaincertain temperature conditions for chemical reactions. If the temperature is too low, the chemical reaction will slow down or even stop, and power cannot be supplied. The phone will naturally indicate that it is low on battery.
The reason why the mobile phone turns off automatically when the temperature is high is because its line alarm system is activated. In the mobile phone line security protection system, temperature measurement detection is one of the protection methods. Whether it is charging, consumption, failure or high temperature caused by the external environment, the battery will terminate its operation.
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Baidu Encyclopedia-Battery