公开(公告)号：US20220224128A1

公开(公告)日：2022-07-14

申请号：US17144807

申请日：2021-01-08

Applicant: GOOGLE LLC

Inventor： James Robert Lim ,  Haoxing Zhang ,  David Wang ,  Dietrich Shing-Quan Ho ,  Yuanyuan Song

IPC: H02J7/00

Abstract: This application is directed to an electronic device powered by one or more rechargeable battery cells. The electronic device includes a first negative temperature coefficient (NTC) thermistor proximate to the battery cells, and an open capacitor coupled in parallel with the NTC thermistor. The open capacitor has an open area and two electrodes that are at least partially exposed via the open area and electrically isolated. The electronic device further includes a control circuit coupled to the NTC thermistor and the open capacitor. The control circuit is configured to detect a voltage drop across the NTC thermistor and the open capacitor if conductive liquid enters the open area of the capacitor and electrically connects the two electrodes that are at least partially exposed via the open area.

公开(公告)号：US20210376623A1

公开(公告)日：2021-12-02

申请号：US17228872

申请日：2021-04-13

Applicant: Google LLC

Inventor： Haoxing Zhang ,  David Wang ,  James Robert Lim ,  Dietrich Shing-Quan Ho

IPC: H02J7/00

Abstract: This application is directed to protecting a battery or battery by a battery protection system including two distinct protection integrated circuits (PICs). The two PICs are configured to determine whether a drive current of the battery is at fault and generate distinct switching signals indicating whether the drive current of the battery is at fault. The two PICs are interchangeable with each other. The battery protection system further includes control logic and two switching components. The control logic is configured to combine the switching signals provided by the two PICs to provide a combined switching signal. Each switching component is coupled to the control logic and configured to control a current path of charging and discharging the battery based on the combined switching signal.