Fuel cell

Abstract

To prevent inflow of liquid water into a power generating portion even if the liquid water remains in a manifold, and to enable size reduction by making constant the contact or surface pressure. According to the present invention, in a fuel cell comprising a power generating section including an electrolyte membrane joined between an anode and a cathode, and a manifold to cause inflow and outflow of an hydrogen containing gas and an oxygen containing gas separately from each other to the anode and cathode; the manifold is formed with an inflow preventing portion to prevent inflow of a liquid water remaining in the manifold, into the power generating portion.

Description

technical field [0001] The present invention relates to a fuel cell having a manifold for flowing out or flowing in a hydrogen-containing gas or an oxygen-containing gas. Background technique [0002] As such a fuel cell, Patent Document 1 discloses a structure named "fuel cell system". [0003] In the fuel cell system described in Patent Document 1, the internal manifold of the anode outlet is formed such that its volume expands in a region below the vertically lower side of the reaction region of the battery cell structure (Japanese: cell structure), Accompanying with this, the lower profile of the electrolyte membrane of each separator and battery cell structure is in the shape of partially protruding downward in the vertical direction, and the volume-enlarged part of the internal manifold of the anode outlet constitutes a channel for collecting the self-anode gas. A pool of condensed water discharged from the outlet of the flow path. [0004] Patent Document 1: Japanes...

AI Technical Summary

Problems solved by technology

[0005] However, in the fuel cell system described in the aforementioned Patent Document 1, since the water reservoir portion in which the volume of the anode outlet internal manifold is enlarged is located on the lower side in the vertical direction than the gas flow path, the battery cell structure A part of it bulges out and tends to increase in size, and the assembly structure (Japanese: スタッキング structure) also becomes complicated

[0006] Moreover, since a part of the battery cell structure bulges, it tends to become a main cause of uneven surface pressure. As a result, the performance is lowered and the sealing performance is deteriorated, and the rectangular shape including the bulged part also becomes a wasteful area, which cannot be achieved. Avoid oversizing

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