US 12,485,783 B2
Converter and power conversion system for converting power of auxiliary battery using OBC
In Yong Yeo, Bucheon-si (KR); Youn Sik Lee, Suwon-si (KR); and Se Wan Choi, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Kia Corporation, Seoul (KR); Hyundai Motor Company, Seoul (KR); and Foundation for Research and Business, Seoul National University of Science and Technology, Seoul (KR)
Filed on Nov. 11, 2022, as Appl. No. 18/054,759.
Claims priority of application No. 10-2022-0099368 (KR), filed on Aug. 9, 2022.
Prior Publication US 2024/0051411 A1, Feb. 15, 2024
Int. Cl. B60L 53/20 (2019.01); B60L 58/18 (2019.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01); H02J 7/34 (2006.01); H02M 3/158 (2006.01)
CPC B60L 53/20 (2019.02) [B60L 58/18 (2019.02); H01M 10/425 (2013.01); H01M 10/44 (2013.01); H02J 7/342 (2020.01); H02M 3/158 (2013.01); B60L 2210/12 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A power conversion system comprising:
an on-board charger;
a main battery configured to be recharged with power and to supply the recharged power to a motor, thereby supplying rotation force to a wheel of a vehicle;
an auxiliary battery configured to recharge the main battery or to assist a power supply function of the main battery; and
a power converter connected to the auxiliary battery, the power converter comprising a bypass circuit and a buck switch,
wherein a part of the on-board charger and the power converter constitute a DC-DC converter, and
wherein the buck switch is configured to be repeatedly switched on and off when a voltage of the auxiliary battery is higher than a voltage of the main battery, and does not operate when the voltage of the auxiliary battery is not higher than the voltage of the main battery.