The mass adoption of electric vehicles is hindered by the inadequate extreme fast charging (XFC) performance of commercial high-specific-energy lithium-ion batteries (LIBs). This paper proposes regulating the battery's self-generated heat via active thermal switching to enable XFC. Retaining heat during XFC boosts cell kinetics, while dissipating heat afterward reduces detrimental reactions. The approach enables reliable battery operation with <15 min charge and 1 h discharge, meeting US Department of Energy XFC targets, without modifying cell materials or structures. The feasibility of integrating this approach into a commercial battery thermal management system is also demonstrated.

Yuqiang Zeng, Buyi Zhang, Yanbao Fu, Fengyu Shen, Qiye Zheng, Divya Chalise, Ruijiao Miao, Sumanjeet Kaur, Sean D. Lubner, Michael C. Tucker, Vincent Battaglia, Chris Dames, Ravi S. Prasher