US 12,233,721 B2
Power supply system for autonomous vehicle and control method thereof
Sang Wook Park, Hwaseong-si (KR); Je Hyun Kim, Seoul (KR); Young Ho Kim, Seoul (KR); Kuk Hyeon Yoo, Seoul (KR); and Oh Kab Kwon, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); Kia Corporation, Seoul (KR); and THN Corporation, Daegu (KR)
Filed by Hyundai Motor Company, Seoul (KR); Kia Corporation, Seoul (KR); and THN Corporation, Daegu (KR)
Filed on Jun. 23, 2023, as Appl. No. 18/213,637.
Claims priority of application No. 10-2022-0156580 (KR), filed on Nov. 21, 2022.
Prior Publication US 2024/0166054 A1, May 23, 2024
Int. Cl. B60L 3/04 (2006.01); B60L 3/00 (2019.01); B60L 58/12 (2019.01); B60L 58/22 (2019.01)
CPC B60L 3/04 (2013.01) [B60L 3/0046 (2013.01); B60L 58/12 (2019.02); B60L 58/22 (2019.02); B60L 2210/10 (2013.01); B60L 2240/547 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power supply system for a vehicle, the power supply system comprising:
a low voltage DC/DC converter (LDC) configured to convert a high voltage into a low voltage;
a main battery configured to be charged by the LDC and to supply power to a junction block divided into an essential load part and a general load part;
a control block comprising a first power switch configured to control power between the LDC and the junction block, a second power switch configured to control power between the main battery and the junction block, and a load switch configured to selectively cut off the power to the general load part;
an auxiliary battery configured to selectively supply power to an auxiliary junction block; and
an auxiliary control block configured to supply the power from the auxiliary battery to the auxiliary junction block, wherein the auxiliary control block is configured to:
control power from the auxiliary battery to the main battery in response to a short in the LDC,
compare a voltage of the main battery and a voltage of the auxiliary battery; and
selectively control a current to flow in a forward direction or a reverse direction using a converter disposed therein.