Patent ID: 11870107
Assignee: LG CHEM, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A fuel cell stack comprising:
a plurality of fuel cells,
wherein each of the plurality of fuel cells comprises:
a membrane-electrode assembly comprising an anode electrode and a cathode electrode;
first and second gas diffusion layers on opposing sides of the membrane-electrode assembly, respectively;
a first separating plate comprising a first surface facing the anode electrode and contacting the first gas diffusion layer and a second surface opposite to the first surface of the first separating plate; and
a second separating plate comprising a first surface facing the cathode electrode and contacting the second gas diffusion layer and a second surface opposite to the first surface of the second separating plate,
wherein at least one of the second surface of the first separating plate and the second surface of the second separating plate comprises one or more protrusions protruding therefrom,
the plurality of fuel cells comprises a first fuel cell and a second fuel cell that is stacked on the first fuel cell and is adjacent to the first fuel cell,
the second surface of the first separating plate of the first fuel cell and the second surface of the second separating plate of the second fuel cell face each other,
the second surface of the first separating plate of the first fuel cell and the second surface of the second separating plate of the second fuel cell are spaced apart from each other by the one or more protrusions such that a space for a flow of cooling water is defined therebetween,
the second fuel cell further comprises a reaction zone on the first surface of the second separating plate of the second fuel cell, and the reaction zone comprises a porous body comprising a plurality of holes for a flow of oxidizing gas,
the porous body is bonded onto a bonding portion of the first surface of the second separating plate of the second fuel cell, and the bonding portion is a flat surface,
the first surface of the first separating plate of the first fuel cell comprises a second reaction zone comprising a plurality of first channels for a flow of a fuel gas, and the second surface of the first separating plate of the first fuel cell comprises a second channel between two adjacent ones of the plurality of first channels for the flow of the cooling water, and
wherein the second surface of the second separating plate comprises a first portion and a second portion, the first portion of the second surface of the second separating plate comprises the one or more protrusions when the second surface of the second separating plate comprises the one or more protrusions, and the second portion of the second surface of the second separating plate faces the first separating plate opposite the second reaction zone, and
an entirety of the second portion of the second surface of the second separating plate is flat and is devoid of protrusions and channels.