US 12,407,006 B2
Fuel cell system and control method thereof
Min Gu Park, 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 Aug. 23, 2022, as Appl. No. 17/894,035.
Claims priority of application No. 10-2022-0034920 (KR), filed on Mar. 21, 2022.
Prior Publication US 2023/0299313 A1, Sep. 21, 2023
Int. Cl. H01M 8/04 (2016.01); H01M 8/04082 (2016.01); H01M 8/04089 (2016.01); H01M 8/04302 (2016.01); H01M 8/04537 (2016.01); H01M 8/04791 (2016.01)
CPC H01M 8/04097 (2013.01) [H01M 8/04201 (2013.01); H01M 8/04302 (2016.02); H01M 8/04604 (2013.01); H01M 8/04798 (2013.01); H01M 2250/20 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A fuel cell system comprising:
an air supply line to supply air to a fuel cell stack and an air exhaust line to discharge air after reaction to an outside;
an air recirculation line having one side branched from the air exhaust line and the other side connected to the air supply line to recirculate the air after reaction;
an air recirculation valve provided in the air recirculation line to control a degree of recirculation of the air after reaction;
a controller to control an opening degree of the air recirculation valve when recirculation of the air after reaction is required; and
an air supply valve provided in the air supply line to supply the air to the fuel cell stack and having a bypass line connected to the air exhaust line therein,
wherein the controller controls the opening degree of the air supply valve and at the same time controls the opening degree of the air recirculation valve when the recirculation of the air after reaction is required.