US 11,735,943 B2
Charging system, method, apparatus and terminal device
Jie Fan, Beijing (CN)
Assigned to BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed by BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed on Dec. 23, 2020, as Appl. No. 17/133,548.
Claims priority of application No. 202010463412.4 (CN), filed on May 27, 2020.
Prior Publication US 2021/0376645 A1, Dec. 2, 2021
Int. Cl. H02J 7/04 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/007182 (2020.01) [H02J 7/0013 (2013.01)] 20 Claims
 
1. A charging system, comprising:
a first battery;
a second battery having a capacity smaller than that of the first battery, wherein the second battery comprises a cell and a switch device connected to the cell;
a charging component connected to the first battery and connected to the second battery via the switch device, wherein the charging component is configured to output a charging current to the first battery and the second battery; and
a control component connected to the first battery and the second battery, wherein the control component is configured to detect electric quantity of the first battery and the second battery during a charging process, and control the switch device to turn on or turn off based on the electric quantity.