US 11,791,481 B2
Fuel cell system
Ryoji Sakai, Wako (JP); Takuto Nakagawa, Wako (JP); Sho Akabori, Wako (JP); and Tomoyuki Inoue, Wako (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 10, 2022, as Appl. No. 17/571,853.
Claims priority of application No. 2021-004172 (JP), filed on Jan. 14, 2021.
Prior Publication US 2022/0223883 A1, Jul. 14, 2022
Int. Cl. H01M 8/04119 (2016.01); H01M 8/04746 (2016.01); H01M 8/0432 (2016.01); H01M 8/04537 (2016.01); H01M 8/04228 (2016.01); H01M 8/04223 (2016.01)
CPC H01M 8/04134 (2013.01) [H01M 8/04228 (2016.02); H01M 8/04253 (2013.01); H01M 8/04358 (2013.01); H01M 8/04619 (2013.01); H01M 8/04768 (2013.01); H01M 8/04783 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A fuel cell system provided in a moving body, the fuel cell system comprising:
a fuel cell stack;
a cathode supply path configured to supply cathode gas to the fuel cell stack;
a cathode discharge path through which cathode off-gas is discharged from the fuel cell stack;
a bypass passage connecting the cathode supply path and the cathode discharge path so as to bypass the fuel cell stack; and
an air pump configured to supply the cathode gas to the cathode supply path;
one or more stop valves provided between a connection point of the bypass passage on the cathode supply path or the cathode discharge path and the fuel cell stack;
a bypass valve provided in the bypass passage; and
a control device configured to control operations of the air pump, the one or more stop valves, and the bypass valve,
wherein the control device is configured to:
acquire temperature information related to a temperature of the fuel cell stack, from a temperature detection unit provided in the fuel cell system;
determine whether or not the acquired temperature information exceeds a predetermined temperature value when a signal related to stoppage of power generation of the fuel cell stack is received during operation of the moving body;
perform a first control of stopping power generation of the fuel cell stack by closing the one or more stop valves and opening the bypass valve, if it is determined that the temperature information exceeds the predetermined temperature value; and
perform a second control of generating, with the fuel cell stack, electric power smaller than electric power consumed by the air pump, by operating the air pump, if it is determined that the temperature information is equal to or lower than the predetermined temperature value.