公开(公告)号：US20200064410A1

公开(公告)日：2020-02-27

申请号：US16673666

申请日：2019-11-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wenping TONG ,  Kui ZHOU ,  Wencheng WANG

IPC: G01R31/389 ,  G01R31/385 ,  G01R31/36

Abstract: An insulation resistance detection circuit, detection method, and detection apparatus are provided. The circuit includes an alternating-current signal source, a resonant cavity, a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch, and a second switch. The alternating-current signal source is sequentially connected to the first resistor, the resonant cavity, the first switch, the second resistor, and the third resistor in series to form a loop. The first resistor is connected to a positive electrode of the alternating-current signal source, and the third resistor is connected to a negative electrode of the alternating-current signal source. One end of the second switch is connected to a negative electrode of a to-be-detected battery, the other end of the second switch is connected to the fourth resistor, and the other end of the fourth resistor is connected to ground.