US 12,403,784 B2
Vehicle battery charging system using motor driving system
Myung Ho Kim, Incheon (KR); Young Seul Lim, Seoul (KR); Sang Cheol Shin, Suwon-Si (KR); and Kang Ho Jeong, Hwaseong-Si (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 Sep. 16, 2022, as Appl. No. 17/946,829.
Claims priority of application No. 10-2022-0015595 (KR), filed on Feb. 7, 2022.
Prior Publication US 2023/0249566 A1, Aug. 10, 2023
Int. Cl. H02J 7/00 (2006.01); B60L 7/10 (2006.01); B60L 50/60 (2019.01); B60L 53/24 (2019.01); B60L 53/62 (2019.01); H02J 7/02 (2016.01); H02J 7/14 (2006.01); H02M 1/08 (2006.01); H02M 7/5387 (2007.01)
CPC B60L 53/24 (2019.02) [B60L 7/10 (2013.01); B60L 50/60 (2019.02); B60L 53/62 (2019.02); H02J 7/02 (2013.01); H02J 7/14 (2013.01); H02M 1/08 (2013.01); H02M 7/5387 (2013.01); B60L 2210/14 (2013.01); B60L 2210/40 (2013.01); H02J 2207/20 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A battery charging system for charging a battery using a motor driving system for driving a motor including a plurality of windings corresponding to a plurality of phases, respectively, the battery charging system comprising:
a first inverter including a plurality of first switching elements and including a direct current (DC) terminal connected to the battery and an alternative current (AC) terminal connected to a first end of the plurality of windings;
a second inverter including a plurality of second switching elements and including a DC terminal connected to the battery and an AC terminal connected to a second end of the plurality of windings;
a plurality of third switching elements each including a first end connected to the second end of the plurality of windings and a second end connected to each other;
a charging capacitor provided between the second end of the plurality of third switching elements and a negative terminal of the battery, and to which a DC charging voltage is applied in a charging mode for charging the battery;
a fourth switching element connected in series with the charging capacitor between the second end of the plurality of third switching elements and the negative terminal of the battery; and
a controller configured to turn on the fourth switching element in the charging mode and to control open/short-circuited states of the plurality of first switching elements, the plurality of second switching elements, and the plurality of third switching elements based on a magnitude of the DC charging voltage and a magnitude of a voltage of the battery.