公开(公告)号：US10297881B2

公开(公告)日：2019-05-21

申请号：US15384206

申请日：2016-12-19

Applicant: BYD COMPANY LIMITED

Inventor： Xi Shen ,  Wenfeng Jiang ,  Jin Liu ,  Xiaohui Jia

IPC: H01M10/615 ,  H01M10/42 ,  H01M10/625 ,  H01M10/6571 ,  B60H1/00 ,  H01M10/44 ,  H01M10/48 ,  B60L58/26 ,  B60L58/27 ,  B60K1/00

Abstract: Embodiments of the present disclosure provide a battery heating system, a battery assembly and an electric vehicle. The battery heating system includes: a battery group having a positive terminal and a negative terminal; a switch having a first end connected with the positive terminal; a large-current discharge module, and a controller connected to the switch and configured to control the switch according to a temperature of the battery group. A first end of the large-current discharge module is connected to a second end of the switch, and a second end of the large-current discharge module is connected to the negative terminal. When the switch is turned on, the battery group discharges via the large-current discharge module and the battery group is heated due to an internal resistance thereof.