US 12,034,191 B2
Fuel cell power control system and method
Byung Jun Sung, Anyang-si (KR); and Sang Pil Jang, Anyang-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 Jul. 27, 2022, as Appl. No. 17/815,262.
Claims priority of application No. 10-2021-0164714 (KR), filed on Nov. 25, 2021.
Prior Publication US 2023/0163332 A1, May 25, 2023
Int. Cl. H01M 8/04858 (2016.01); B60L 7/18 (2006.01); B60L 58/40 (2019.01); H01M 8/04537 (2016.01)
CPC H01M 8/04888 (2013.01) [H01M 8/04567 (2013.01); H01M 8/04873 (2013.01); B60L 7/18 (2013.01); B60L 58/40 (2019.02); B60L 2210/10 (2013.01); H01M 2220/20 (2013.01); H01M 2250/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fuel cell power control system comprising:
a fuel cell generating electric power;
a load unit electrically connected to the fuel cell;
a DC/DC converter disposed between the fuel cell and the load unit and configured to convert the electric power between a low side of the DC/DC converter electrically connected to the fuel cell and a high side of the DC/DC converter electrically connected to the load unit;
a battery electrically connected to the high side of the DC/DC converter to be parallel to the load unit; and
a controller monitoring a voltage of the load unit, the battery, or the high side of the DC/DC converter, and controlling the electric power input to the load unit or output from the load unit in accordance with the monitored voltage,
wherein the load unit comprises a regenerative motor, and the controller controls regenerative braking power of the load unit in accordance with the monitored voltage, and
wherein, when the monitored voltage is equal to or higher than a first predetermined voltage lower than the maximum allowable voltage of the DC/DC converter, the controller increases the electric power input to the load unit or reduces the electric power output from the load unit so as to reduce the electric power charged in the battery.