With the arrival of the recent continuous cold wave, the lithium battery test of various products has also followed. The winter life of lithium batteries has been controversial. For example: 1. Lithium battery life is seriously reduced; 2. The discharge of lithium battery is not linear; 3 Cannot charge or charge slowly. However, it is not impossible for lithium batteries to ensure applications at low temperatures. The low-temperature application of lithium batteries can be achieved in a variety of ways. The following is mainly about the low temperature environment, through the BMS pre-heating to heat the lithium battery, so that the lithium battery temperature rises to more than 0 degrees, to ensure the active lithium battery.
BMS pre-heating method:
1. Heating sheet heating: Paste the corresponding heating sheet on the side of the battery cell, and then perform intelligent control through BMS. When the temperature is below 0 degrees, the sensor will send a low temperature signal, the BMS will control the heating of the electric heating sheet, the heat on the electric heating sheet is transferred to the lithium battery cell, as the temperature rises, the battery will gradually return to the active state, so as to achieve the effect of intelligent temperature control.
2. Battery preheating mode: In the design of the battery itself, some electrical energy is reserved for the battery to heat itself. When the temperature is below 0 degrees, the external sensor sends a low temperature signal, and the BMS controls the battery for self-heating. This heating mode saves space while improving heating efficiency.

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