US 12,420,671 B2
Power source switching system, power supply circuit switching method, and electric vehicle
Jun Zhang, Shanghai (CN)
Assigned to SHARKGULF TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai (CN)
Appl. No. 17/777,387
Filed by SHARKGULF TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai (CN)
PCT Filed Oct. 19, 2020, PCT No. PCT/CN2020/121763
§ 371(c)(1), (2) Date May 17, 2022,
PCT Pub. No. WO2021/093517, PCT Pub. Date May 20, 2021.
Claims priority of application No. 201911123867.5 (CN), filed on Nov. 17, 2019.
Prior Publication US 2022/0402401 A1, Dec. 22, 2022
Int. Cl. H02J 7/00 (2006.01); B60L 53/30 (2019.01); B60L 58/19 (2019.01); H02J 7/36 (2006.01)
CPC B60L 58/19 (2019.02) [B60L 53/305 (2019.02); H02J 7/0024 (2013.01); H02J 7/36 (2013.01); B60Y 2200/91 (2013.01); H02J 2310/48 (2020.01)] 5 Claims
OG exemplary drawing
 
1. A power source switching system, comprising: a first power source unit, a second power source unit, and a system switching control unit, the system switching control unit being electrically connected to the first power source unit and the second power source unit, wherein the system switching control unit controls the first power source unit and the second power source unit to be connected in series or in parallel, and controls switching between the series connection of the first power source unit and the second power source unit and the parallel connection of the first power source unit and the second power source unit, thereby implementing a charging and discharging process of the first power source unit and the second power source unit; wherein the first power source unit comprises a first power source management system, a first switch, and a first power source, the first power source management system comprises a first power source control unit, the first power source control unit is electrically connected to the system switching control unit, and the system switching control unit controls the first switch to be turned on/off via the first power source control unit;
and the second power source unit comprises a second power source management system, a second switch, and a second power source, the second power source management system comprises a second power source control unit, the second power source control unit is electrically connected to the system switching control unit, and the system switching control unit controls the second switch to be turned on/off via the second power source control unit;
wherein the power source switching system further comprises a third switch, a fourth switch, and a fifth switch, wherein the third switch, the fourth switch, and the fifth switch each are electrically connected to the system switching control unit; and
wherein the third switch is provided on a common terminal of positive terminals of the first power source unit and the second power source unit, the fifth switch is provided on a common terminal of negative terminals of the first power source unit and the second power source unit, one terminal of the fourth switch is connected to the common terminal of the positive terminals of the first power source and the second power source, and the other terminal of the fourth switch is connected to the common terminal of the negative terminals of the first power source unit and the second power source unit;
when the first switch and the third switch are both closed, and the second switch, the fourth switch, and the fifth switch are all open, the first power source unit enters an operating mode of single-power-source charging and discharging;
when the second switch and the third switch are both closed, and the first switch, the fourth switch, and the fifth switch are all open, the second power source unit enters an operating mode of single-power-source charging and discharging;
when the first switch, the second switch, the third switch, and the fifth switch are closed, and the fourth switch is open, the first power source unit and the second power source unit enter a parallel charging and discharging mode; and
when the first switch, the second switch, and the fourth switch are closed, and the third switch and the fifth switch are open, the first power source unit and the second power source unit enter a series charging and discharging mode.