A Review of AC Heating Technique for Lithium-Ion Batteries

The lithium-ion battery needs to be heated to restore the charging/discharging performance under a low-temperature environment. The Alternating Current (AC) heating technique can heat the battery quickly and uniformly, and has advantages in terms of energy consumption, efficiency, and additional components. This paper presents a systematical review of the state-of-art AC heating technique for lithium-ion batteries. The heating effect of various AC waveforms under low-temperature environments is presented. Then, the factors affecting the AC heating effect are analyzed, including frequency, amplitude, ambient temperature, and current waveforms. Moreover, the implementations of AC heaters are summarized and compared. Finally, future trends in AC heating techniques are discussed.