Fuel cell separator and single fuel cell

Abstract

A fuel cell separator and a single fuel cell are disclosed. The fuel cell separator includes ribs. The fuel cell separator has a plurality of gas flow paths separated from each other by the ribs. Thefuel cell separator has, on a surface of the ribs on the gas flow path side, a liquid water flow path provided separately from the gas flow paths along the gas flow paths. The liquid water flow path has an expanded region in which a cross-sectional area of the liquid water flow path in a direction perpendicular to a flow direction of the liquid water flow path is larger than a cross-sectional areaof the liquid water flow path in the direction perpendicular to the flow direction in a remaining region of the liquid water flow path.

Description

technical field [0001] The present disclosure relates to a separator for a fuel cell and a single cell for a fuel cell. Background technique [0002] As a structure of a single cell for a fuel cell, a structure in which a membrane electrode assembly, a gas diffusion layer, and a separator are laminated is known. Here, the separator has a gas flow path through which the reaction gas, ie, the cathode gas or the anode gas, flows into the single fuel cell. [0003] In the single cell for fuel cell having the above-mentioned structure, liquid water such as produced water formed by the cell reaction enters the gas flow path, thereby clogging the gas flow path, whereby gas flows into the single cell for fuel cell. Reduced efficiency, reduced power generation efficiency, and / or potential for flooding, etc. [0004] In response to such a possibility, in order to efficiently discharge liquid water from the inside of a fuel cell cell, optimization of the shape of the gas flow path, t...

AI Technical Summary

Problems solved by technology

[0012] However, it is also required to suppress the decrease in power generation efficiency and the generation of flooding of the single cells for fuel cells

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