公开(公告)号：US20200011929A1

公开(公告)日：2020-01-09

申请号：US16576368

申请日：2019-09-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wencheng Wang ,  Yang Lv ,  Ting Gao

IPC: G01R31/327 ,  B60L3/00 ,  G01R19/10

Abstract: A detection circuit includes a switch conversion unit and a collection control unit. The switch conversion unit is configured to: enable a first end of the switch conversion unit to connect to a third end of the switch conversion unit within first duration, and enable a second end of the switch conversion unit to connect to the third end of the switch conversion unit within second duration. The collection control unit is configured to: collect a voltage (V1) between a first end of a relay and a second end of a battery pack within the first duration, collect a voltage (V2) between a second end of the relay and the second end of the battery pack within the second duration, and determine, based on V1 and V2, whether the relay is faulty.

公开(公告)号：US11313908B2

公开(公告)日：2022-04-26

申请号：US16576368

申请日：2019-09-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wencheng Wang ,  Yang Lv ,  Ting Gao

IPC: G01R31/327 ,  B60L3/00 ,  G01R19/10

Abstract: A detection circuit includes a switch conversion unit and a collection control unit. The switch conversion unit is configured to: enable a first end of the switch conversion unit to connect to a third end of the switch conversion unit within first duration, and enable a second end of the switch conversion unit to connect to the third end of the switch conversion unit within second duration. The collection control unit is configured to: collect a voltage (V1) between a first end of a relay and a second end of a battery pack within the first duration, collect a voltage (V2) between a second end of the relay and the second end of the battery pack within the second duration, and determine, based on V1 and V2, whether the relay is faulty.