公开(公告)号：US20220209551A1

公开(公告)日：2022-06-30

申请号：US17695474

申请日：2022-03-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Mingwei ZHANG ,  Ruichao TANG ,  Lihou MA ,  Hui WANG

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/42 ,  G01R31/3842

Abstract: This application provides an electronic device, a charging method, and a charging system for charging two batteries connected in series. The charging integrated circuit controls, based on a target voltage corresponding to each preset period, a charging mode for charging the two batteries. As a charging process is prolonged, the voltages of the two batteries gradually increase, and the target voltage obtained varies with each period. A turning point of switching from constant current charging to constant voltage charging is determined based on the target voltage, and the target voltage is related to the minimum voltage value of the two batteries in each preset period. The charging mode is adjusted based on the target voltage corresponding to each preset period instead of a fixed target voltage. This reduces a probability of battery overcharging and improves battery charging reliability.

公开(公告)号：US20220255333A1

公开(公告)日：2022-08-11

申请号：US17724923

申请日：2022-04-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Mingwei ZHANG ,  Ruichao TANG ,  Yao YUAN ,  Lihou MA

IPC: H02J7/00 ,  G01R31/3835 ,  G01R31/374

Abstract: A battery capacity tracking method and apparatus, and a device are provided. For two batteries connected in series, a first remaining capacity change value corresponding to a first battery when the first battery is switched between a fully charged state and a fully discharged state is obtained; a second remaining capacity change value corresponding to the second battery when the second battery is switched between a fully charged state and a fully discharged state is obtained; and after a remaining capacity change value corresponding to a battery when the battery is switched from one state to another state is obtained, a full charge capacity of the first battery is determined based on the first remaining capacity change value, the second remaining capacity change value, and a full charge capacity of the second battery.