US 12,139,029 B2
Vehicle battery charging system and charging method using the same
Young Jin Jang, Seoul (KR); Sung Hwan Kim, Gyeonggi-do (KR); Won Yong Sung, Gyeonggi-do (KR); Dong Jun Lee, Gyeonggi-do (KR); and Hye Seung Kim, Gyeonggi-do (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Oct. 25, 2021, as Appl. No. 17/509,737.
Claims priority of application No. 10-2020-0182467 (KR), filed on Dec. 23, 2020.
Prior Publication US 2022/0194238 A1, Jun. 23, 2022
Int. Cl. B60L 53/22 (2019.01); B60L 8/00 (2006.01); B60L 50/60 (2019.01)
CPC B60L 53/22 (2019.02) [B60L 8/003 (2013.01); B60L 50/60 (2019.02)] 18 Claims
OG exemplary drawing
 
1. A system for charging a vehicle battery, the system comprising:
a main battery;
an auxiliary battery;
an integrated converter including a high voltage charging device configured to supply power to the main battery and a low voltage charging device configured to supply power to the auxiliary battery;
a solar cell configured to convert sunlight into electrical energy;
a solar cell converter configured to convert an output of the solar cell into a voltage corresponding to a voltage of the auxiliary battery and output the converted voltage to the auxiliary battery; and
a switching device configured to switch between the integrated converter and external power and the integrated converter and the solar cell,
wherein the switching device connects the integrated converter and the solar cell in a solar cell only charging mode in which the auxiliary battery is charged by the solar cell,
wherein a current, which is caused by a charging voltage of a link capacitor in the integrated converter generated when the auxiliary battery is charged by the high voltage charging device, flows to the auxiliary battery through the solar cell converter when the switching device connects the integrated converter and the solar cell.