US 11,927,639 B2
High-voltage interlocking device and method for detecting the high-voltage interlocking device
Weiqiang Li, Ningde (CN); Yanhui Fu, Ningde (CN); Xingchang Wang, Ningde (CN); and Changjian Liu, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on Sep. 30, 2021, as Appl. No. 17/490,055.
Application 17/490,055 is a continuation of application No. PCT/CN2021/081310, filed on Mar. 17, 2021.
Claims priority of application No. 202010538310.4 (CN), filed on Jun. 12, 2020.
Prior Publication US 2022/0018905 A1, Jan. 20, 2022
Int. Cl. G01R 31/00 (2006.01); B60R 16/03 (2006.01); G01R 31/36 (2020.01); G01R 31/52 (2020.01)
CPC G01R 31/36 (2013.01) [B60R 16/03 (2013.01); G01R 31/006 (2013.01); G01R 31/52 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A high-voltage interlocking device, comprising:
a first resistance module, an end of the first resistance module being connected to a first connection end of a first switch module, a first connection end of a high-voltage component under detection, and an end of a second resistance module, respectively, and another end of the first resistance module being connected to a first power terminal;
the first switch module, a second connection end of the first switch module being connected to a first reference potential through a third resistance module, and a control terminal of the first switch module being configured to receive a first driving signal to enable the first switch module to be turned on or off according to the first driving signal;
the second resistance module, another end of the second resistance module being connected to a second reference potential;
a fourth resistance module, an end of the fourth resistance module being connected to a second connection end of the high-voltage component under detection and a first connection end of a second switch module, and another end of the fourth resistance module being connected to a second power terminal;
the second switch module, a second connection end of the second switch module being connected to a third reference potential through a fifth resistance module, and a control terminal of the second switch module being configured to receive a second driving signal to enable the second switch module to be turned on or off according to the second driving signal;
a fault detection module, configured to determine a fault of the high-voltage component under detection according to a first detection signal obtained from the first connection end of the high-voltage component under detection, wherein the fault of the high-voltage component under detection comprises a short power supply fault, an open-circuit fault or a short-ground fault,
wherein an on-off state of the first switch module is opposite to an on-off state of the second switch module, when the first switch module is turned on, power of the high-voltage interlocking device is supplied by the second power terminal, and when the second switch module is turned on, the power of the high-voltage interlocking device is supplied by the first power terminal.