US 12,456,918 B2
Bi-directional high voltage DC-DC converter capable of detecting and avoiding bypass and operating method thereof
Jeehoon Kim, Gyeonggi-do (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
Filed on May 19, 2023, as Appl. No. 18/199,368.
Claims priority of application No. 10-2023-0012771 (KR), filed on Jan. 31, 2023.
Prior Publication US 2024/0258907 A1, Aug. 1, 2024
Int. Cl. H02M 1/32 (2007.01); B60L 3/00 (2019.01); B60L 53/22 (2019.01); B60L 58/30 (2019.01); B60L 50/75 (2019.01)
CPC H02M 1/32 (2013.01) [B60L 3/0023 (2013.01); B60L 53/22 (2019.02); B60L 58/30 (2019.02); B60L 50/75 (2019.02); B60L 2210/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A bi-directional high voltage DC-DC converter to be connected to a fuel cell control unit installed in a fuel cell electric vehicle, the bi-directional high voltage DC-DC converter comprising:
a control circuit configured to detect whether a bypass in the bi-directional high voltage DC-DC converter has occurred, based on an input voltage and an output voltage of the bi-directional high voltage DC-DC converter; and
a conversion circuit configured to convert a voltage according to control of the control circuit,
wherein the bypass comprises a case in which current control of the bi-directional high voltage DC-DC converter is unavailable or overcurrent occurs in the bi-directional high voltage DC-DC converter, and
wherein when occurrence of the bypass is detected, the control circuit is configured to, using a bypass avoidance value based on a first command for limiting a current received from the fuel cell control unit, obtain a second command for limiting the current by adding the bypass avoidance value to the first command for limiting the current, and control an operation of the conversion circuit based on the second current limiting command.