公开(公告)号：US20190317153A1

公开(公告)日：2019-10-17

申请号：US16455714

申请日：2019-06-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Denghai PAN ,  Zejie LV ,  Yuanzhong WU

IPC: G01R31/3835 ,  G01R31/36 ,  G01R31/396 ,  H02J7/00

Abstract: A sampling circuit, an equalization circuit, and a system for a single cell in a series battery pack are provided. In the sampling circuit provided in this disclosure, the single cell is isolated from a voltage divider resistor in the bleeder circuit by using the first isolation sampling switch, so as to prevent a drain current of the single cell. In addition, sampling errors in sampling voltages collected by the sampling circuit may be offset during differential calculation.