US 12,308,675 B2
Power supply system and method for terminal device, chip, and terminal device
Ni Sun, Shenzhen (CN); Chunjiang Zhao, Shenzhen (CN); Chengxu Zhang, Shenzhen (CN); and Jianwei Zhu, Shenzhen (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Appl. No. 17/627,483
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
PCT Filed Jul. 16, 2020, PCT No. PCT/CN2020/102266
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/008572, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 201910651651.X (CN), filed on Jul. 18, 2019.
Prior Publication US 2022/0263324 A1, Aug. 18, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0024 (2013.01) [H02J 7/0016 (2013.01); H02J 7/0048 (2020.01); H02J 7/007182 (2020.01); H02J 7/007194 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A power supply system, comprising a battery pack, a bypass circuit, a voltage step-down circuit, and a controller, the battery pack comprising at least two batteries;
wherein an output end of the battery pack is connected to an input end of the voltage step-down circuit, an output end of the voltage step-down circuit is connected to a power consumption element of a terminal device, one end of the bypass circuit is connected to the input end of the voltage step-down circuit, and the other end of the bypass circuit is connected to the output end of the voltage step-down circuit; and
wherein the controller is configured to:
when determining to switch the at least two batteries in the battery pack to operate in a series mode, control the voltage step-down circuit to operate and control the bypass circuit to stop operating, to switch the at least two batteries in the battery pack to operate in the series mode, and when determining to switch the at least two batteries in the battery pack to operate in a parallel mode, control the bypass circuit to operate and control the voltage step-down circuit to stop operating, to switch the at least two batteries in the battery pack to operate in the parallel mode; and
wherein the controller is configured to determine to switch the at least two batteries in the battery pack to operate in the series mode when the controller determines that an output voltage of the battery pack is greater than or equal to a first preset threshold voltage.