What is Battery Thermal Management?
A battery is similar to a human being in that it can neither tolerate too much heat nor like too much cold, with the optimum operating temperature being between 10-30°C. And cars work in a very wide range of environments, -20-50°C is common, so what to do? Then equip the battery with an air conditioner to fulfil 3 functions of thermal management.
Heat dissipation: when the temperature is too high, the battery will lose its life (capacity decay) and the risk of violent death (thermal runaway) increases. Therefore, when the temperature is too high, heat dissipation is required.
Heating: When the temperature is too low, the battery will lose its life (capacity decay), weaken (performance decay), and if charged at this time, it will also lay the risk of violent death (internal short circuit caused by lithium precipitation has the risk of thermal runaway). Therefore, when the temperature is too low, it needs to be heated (or kept warm).
Temperature uniformity: power cells also need to minimise spatial variability in temperature.
