Method and analysis of rapid heating of lithium-ion battery pack in low-temperature environment

This paper summarizes the rapid heating methods, including internal and external heating methods, and analyzes the feasibility, benefits and drawbacks of these methods. Internal heating method through internal impedance, has the advantages of fast heating speed, high utilization rate of energy and good temperature uniformity, but there are problems of complex control mechanism and low safety. The external heating method uses the heat source outside the battery pack. Although the structure is complex, high energy consumption and uneven temperature distribution, the safety is high.