The low-temperature heating principle of Lithium Battery

When the lithium-ion battery is in the temperature range of 15-45 ℃, its charging and discharging performance is the best and its service life is the longest. When the battery is in a low-temperature environment, there may be lithium deposition at the negative electrode during charging of lithium-ion batteries, which can cause serious lifespan degradation and even safety issues. Negative lithium deposition: Lithium ion batteries cannot be charged in environments with temperatures below 0 ℃ Although it will display normal charging, there will be lithium metal precipitation on the anode surface This process is irreversible If charged repeatedly at low temperatures, it can cause damage to the battery and reduce its safety, especially when subjected to external pressure and impact.

So we do not recommend customers to charge at low temperatures( below 0°). Better using a heating device to raise the temperature before charging. For customers in extremely cold regions, we must pay attention to this issue.

The heating function of lithium batteries is currently mostly achieved through the use of heating membranes and resistance heating methods in our technology. There will be some temperature collection points on the surface of the battery (which can be used as temperature sensors). When low temperature is detected, the BMS will turn off the charging circuit, turn on the heating function, and stop heating and charging when the temperature reaches a certain value. This low-temperature collection point and temperature limit can be set.The heating function is only used during the charging process.

The standard settings:the BMS switch on the heating automaticly below 0°C, once it reach 5°C will stop heating and do the charge process.