Battery cabinet temperature is too low to preheat

The ultimate goal of battery preheating is to recover battery performance as quickly as possible at low temperatures while considering battery friendliness, temperature difference, cost, safety and reliability. A systematical review of low temperature preheating techniques for lithium-ion batteries is presented in this paper.

It could preheat the whole battery module to an operating temperature above 0°C within a short period in a very low-temperature environment (–40°C). Based on the volume average temperature, the preheating rate reached 6.7 °C/min with low energy consumption.

Charging at low temperature will induce lithium deposition, and in severe cases, it may even penetrate the separator and cause internal short, resulting in an explosion. Therefore, battery preheating techniques are key means to improve the performance and lifetime of lithium-ion batteries in cold climates.

Battery performance and potential risks under low temperature. Preheating techniques are key means to effectively mitigate battery performance degradation at low temperatures and stop safety problems from occurring . During preheating, there are two modes of heat transfer path, convection and conduction.

In summary, an efficient and evenly preheating of the battery at low temperatures can be achieved by selecting the appropriate AC parameters. However, the impact of quantified AC on battery health remains unclear.

By applying rectangular pulse waveform at 10 A and 30 Hz, the proposed strategy could heat batteries from −24 °C to 25.6 °C within 600 s. Besides, the pulsed self-heating strategy at low temperatures also ensured fast and safe preheating performance..