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What are the common temperature ranges for 100Ah LiFePO4 Powerwall low temperature batteries
Categories: 48V 100Ah LiFePO4 battery Powerwall news
Categories: Industry news
Time of issue:2022-12-02 17:58
The 100Ah LiFePO4 Powerwall low-temperature batteries can generally work below -30 degrees Celsius, and can generally maintain more than 80% capacity at -40 degrees Celsius. A particularly good battery can maintain its original capacity at -40 degrees.
Excellent temperature resistance of soft-pack low-temperature lithium iron phosphate batteries: when discharged at 0.5C at -40°C, the discharge capacity exceeds 65% of the initial capacity; when discharged at 0.3C at -35°C, the discharge capacity exceeds 75% of the initial capacity %;
Wide operating temperature range, -40°C to 55°C; can be charged at -20°C; 100Ah LiFePO4 Powerwall low-temperature lithium iron phosphate lithium-ion battery is discharged at -20°C at 0.2c cycle test curve, after one cycle, still There is a capacity retention rate of over 93%.
The 100Ah LiFePO4 Powerwall's low-temperature iron-lithium-ion battery with a steel shell can discharge at about 60% at a low temperature above -20°C. If the iron-lithium-ion battery manufacturer is strong, it can discharge about 70% of its capacity.
Because the electrolyte used in the 100Ah LiFePO4 Powerwall's steel-cased iron-lithium-ion battery is liquid, its low-temperature resistance has certain disadvantages. Because at low temperatures, the liquid is easily frozen into a solid state. If the temperature is -25°C and below, the discharge capacity will drop sharply, and even the battery will fail to discharge power directly.
Lithium batteries cannot be charged at low temperatures. The electrolyte used in lithium batteries is an organic liquid, like grease, which will become viscous or even condense at low temperatures. At this time, the activity of the conductive lithium salt in it is greatly restricted, so the charging efficiency is very low, which will cause the lithium battery to be charged slowly at low temperature, not fully charged, and the same is true for discharging.
The same is true for lithium polymer batteries. At least one of the positive and negative electrodes and electrolyte of lithium polymer batteries uses polymer materials, and the electrolyte can use solid or colloidal polymer electrolytes. Therefore, the low temperature environment also has an impact on lithium polymer batteries.
Keyword:100Ah LiFePO4 Powerwall
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