US 11,799,108 B2
Fuel cell system
Masaaki Matsusue, Mishima (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Mar. 3, 2022, as Appl. No. 17/653,348.
Claims priority of application No. 2021-034290 (JP), filed on Mar. 4, 2021.
Prior Publication US 2022/0285711 A1, Sep. 8, 2022
Int. Cl. H01M 8/04746 (2016.01); H01M 8/0438 (2016.01); H01M 8/0444 (2016.01); H01M 8/04664 (2016.01); H01M 8/04313 (2016.01); H01M 8/043 (2016.01); H01M 8/04791 (2016.01)
CPC H01M 8/04753 (2013.01) [H01M 8/04395 (2013.01); H01M 8/043 (2016.02); H01M 8/04313 (2013.01); H01M 8/04388 (2013.01); H01M 8/04447 (2013.01); H01M 8/04671 (2013.01); H01M 8/04679 (2013.01); H01M 8/04798 (2013.01); H01M 2220/20 (2013.01); H01M 2250/10 (2013.01); H01M 2250/20 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A fuel cell system,
wherein the fuel cell system comprises:
a fuel cell,
a fuel gas supplier for supplying hydrogen-containing fuel gas to the fuel cell,
a fuel gas supply flow path connecting a fuel gas inlet of the fuel cell and the fuel gas supplier,
a pressure sensor disposed in the fuel gas supply flow path,
a fuel off-gas discharge flow path for discharging, to an outside of the fuel cell system, a fuel off-gas discharged from a fuel gas outlet of the fuel cell,
a vent and discharge valve disposed in the fuel off-gas discharge flow path, and
a controller,
wherein the controller is preliminarily programmed to store a data group indicating a relationship between, when a predetermined amount of hydrogen gas is supplied from the fuel gas supplier, an amount of supplied hydrogen gas and a hydrogen pressure increase rate;
wherein the controller calculates a fuel gas pressure increase rate from a pressure change detected by the pressure sensor when the hydrogen-containing fuel gas is supplied to the fuel cell;
wherein the controller is programmed to determine whether or not the fuel gas pressure increase rate is smaller than the hydrogen pressure increase rate; and
wherein, when the controller determines that the fuel gas pressure increase rate is smaller than the hydrogen pressure increase rate, the controller is programmed to prohibit power generation of the fuel cell.