US 12,288,915 B2
Fuel battery stack
Satoshi Kawabe, Ichinomiya (JP)
Assigned to TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-ken (JP)
Appl. No. 17/636,306
Filed by TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-ken (JP)
PCT Filed Nov. 27, 2020, PCT No. PCT/JP2020/044281
§ 371(c)(1), (2) Date Feb. 17, 2022,
PCT Pub. No. WO2021/124836, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-226250 (JP), filed on Dec. 16, 2019.
Prior Publication US 2022/0285719 A1, Sep. 8, 2022
Int. Cl. H01M 8/2483 (2016.01)
CPC H01M 8/2483 (2016.02) [H01M 2250/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fuel cell stack, comprising:
a cell stack body including single cells stacked together;
a terminal plate that is disposed to be adjacent to the cell stack body in a stacking direction and is configured to collect power; and
an end plate disposed on a side of the terminal plate that is opposite to the cell stack body, wherein
the terminal plate and the end plate have a through-hole that discharges reactant gas from the cell stack body,
the fuel cell stack further comprises a passage portion that covers an inner peripheral surface of the through-hole and forms a discharge passage for the reactant gas, and
the passage portion includes:
a peripheral wall that is formed of a plastic having an electrical insulation property; and
a hydrophilic portion disposed on an inner peripheral surface of the peripheral wall and made of a plastic having a hydrophilicity higher than that of the plastic forming the peripheral wall.