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1. (WO2017148124) BATTERY PROTECTING DEVICE AND POWER ASSEMBLY

Pub. No.:    WO/2017/148124    International Application No.:    PCT/CN2016/097967
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: H02H 7/18
Applicants: BYD COMPANY LIMITED
比亚迪股份有限公司
Inventors: ZHOU, Yanfei
周燕飞
Title: BATTERY PROTECTING DEVICE AND POWER ASSEMBLY
Abstract:
A battery protecting device (20) and a power assembly. The battery protecting device (20) is used for protecting a battery pack which comprises N batteries that are connected in series. The device (20) comprises: a positive output terminal (201) and a negative output terminal (202); M fuses, connected in series with the N batteries; P thermistors, attached to the peripheries of the battery pack, and used for measuring the temperature of the battery pack; a first switch assembly (203) which comprises a controlled terminal (203a), a first terminal (203b), and a second terminal (203c), wherein the first terminal (203b) is connected to the positive electrode of the battery pack by at least one fuse of the M fuses, and the second terminal (203c) is connected to the negative electrode of the battery pack; and a first control module (204), connected to the thermistors, connected to the controlled terminal (203a) of the first switch assembly (203), and used for obtaining the temperature of the battery pack, and controlling, when the temperature satisfies a preset temperature protection condition, the first switch assembly (203) to be turned on, such that the battery pack is shorted.