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1. (WO2018076816) INSULATION RESISTANCE DETECTION CIRCUIT AND METHOD

Pub. No.:    WO/2018/076816    International Application No.:    PCT/CN2017/093208
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Tue Jul 18 01:59:59 CEST 2017
IPC: G01R 27/02
Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
宁德时代新能源科技股份有限公司
Inventors: QIAO, Hongbing
乔宏冰
JIA, Hui
贾慧
HUA, Yanjie
华炎杰
Title: INSULATION RESISTANCE DETECTION CIRCUIT AND METHOD
Abstract:
An insulation resistance detection circuit and method. The insulation resistance detection circuit comprises: a battery (1), a first branch (2), a second branch (3), a third branch (4), and a fourth branch (5); a possible electrode of the battery (1) is connected to a first end of the first branch (2); the first branch (2) is provided with a first voltage output point (21); a first switch (31) is provided in the second branch (3), and a first end of the second branch (3) is connected to the first end of the first branch (2); a second end of the first branch (2) and a second end of the second branch (3) are both grounded; a negative electrode of the battery (1) is connected to a first end of the third branch (4); the third branch (4) is provided with a second voltage output point (41); a second switch (51) is provided in the fourth branch (5), and a first end of the fourth branch (5) is connected to the first end of the third branch (4); and a second end of the third branch (4) and a second end of the fourth branch (5) are both grounded. According to the insulation resistance detection circuit, the detection range of insulation resistance is expanded, and the detection efficiency of insulation resistance is improved.