公开(公告)号：US11360150B2

公开(公告)日：2022-06-14

申请号：US17229640

申请日：2021-04-13

申请人： O2 Micro, Inc.

发明人： Guoxing Li

IPC分类号： G01R31/371 ,  H01M10/48 ,  G01R31/396 ,  H02J7/00 ,  H01M10/42

摘要： A battery management system includes multiple sensors, status detection circuitry, and fault detection circuitry. The sensors sense statuses of a battery pack. The status detection circuitry detects whether the battery pack is in a normal condition based on the statuses to generate a detection result. The fault detection circuitry detects whether a fault is present in the battery pack. The sensors include a current sensor that senses a battery current of the battery pack. The fault detection circuitry includes a detection circuit that monitors a rate of change of a voltage at a terminal of the battery pack, and detects whether a fault is present in the current sensor based on a result of a comparison between the rate of change and a threshold and based on the detection result.

公开(公告)号：US11009553B2

公开(公告)日：2021-05-18

申请号：US16058218

申请日：2018-08-08

申请人： O2 Micro, Inc.

发明人： Guoxing Li

IPC分类号： G01R31/36 ,  G01R31/371 ,  H01M10/48 ,  H02J7/00 ,  G01R31/396 ,  H01M10/42

摘要： A battery management system includes multiple sensors, status detection circuitry, and fault detection circuitry. The sensors sense statuses of a battery pack. The status detection circuitry detects whether the battery pack is in a normal condition based on the statuses to generate a detection result. The fault detection circuitry detects whether a fault is present in the battery pack. The sensors include a current sensor that senses a battery current of the battery pack. The fault detection circuitry includes a detection circuit that monitors a rate of change of a voltage at a terminal of the battery pack, and detects whether a fault is present in the current sensor based on a result of a comparison between the rate of change and a threshold and based on the detection result.