US 11,691,525 B2
System and method of controlling charge of vehicle battery
Dae Woo Lee, Incheon (KR); Jae Eun Cha, Gwangmyeong-si (KR); Byung Gu Kang, Daegu (KR); and Tae Jong Ha, Seoul (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 Nov. 29, 2021, as Appl. No. 17/537,047.
Application 17/537,047 is a division of application No. 16/746,082, filed on Jan. 17, 2020, granted, now 11,214,158.
Claims priority of application No. 10-2019-0083879 (KR), filed on Jul. 11, 2019.
Prior Publication US 2022/0080846 A1, Mar. 17, 2022
Int. Cl. B60L 53/22 (2019.01); H02M 3/335 (2006.01); H02J 7/00 (2006.01)
CPC B60L 53/22 (2019.02) [H02J 7/0013 (2013.01); H02M 3/33576 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); H02J 2207/20 (2020.01)] 3 Claims
OG exemplary drawing
 
1. A method of controlling charge of a vehicle battery, the method comprising:
determining, by a control unit, whether a high voltage battery and a low voltage battery are charged in a first charging mode, a second charging mode, or a third charging mode;
charging at least one of the high voltage battery or the low voltage battery by controlling a first full-bridge circuit unit, a second full-bridge circuit unit, and a low voltage direct current (DC) converter unit based on the determined first, second or third charging mode;
when the first charging mode is determined, controlling, by the control unit, a switching frequency of first to eighth switching elements;
activating, by the control unit, the first to eighth switching elements to charge the high voltage battery; and
charging the low voltage battery by turning on a ninth switching element to smooth a voltage which is full-wave rectified by a rectifying unit through a second capacitor and controlling a switching frequency of a tenth switching element to vary the smoothed voltage.