Gaskets for fuel cells

A fuel cell and gasket technology, which is applied in the field of fuel cell gaskets, and can solve problems such as excessive compression of the gasket body 21

Active Publication Date: 2020-05-05
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While using the above image 3 In the case of the fuel cell gasket 11, the lip-shaped contact portion 23 of the first gasket main body 21 and the planar contact portion 33 of the second gasket main body 31 are formed to sandwich the intermediate member 54 when the battery cells are joined. However, as the intermediate member 54, when the joint load of the GDL56 arranged together with the MEA55 is small, the gasket main bodies 21 and 31 may be excessively compressed.

Method used

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  • Gaskets for fuel cells
  • Gaskets for fuel cells
  • Gaskets for fuel cells

Examples

Experimental program
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Effect test

Embodiment

[0035] Hereinafter, embodiments of the present invention will be described based on the drawings.

no. 1 example

[0037] like figure 1 As shown, the fuel cell gasket 11 according to this embodiment includes an intermediate member 54 including an MEA (membrane electrode assembly) 55 and a GDL (gas diffusion layer) 56 mounted between a pair of separators 52 and 53 . A gasket for the fuel cell 51 having a structure including a gasket main body (first gasket main body) 21 held on one separator 52 of a pair of separators 52 and 53, and a gasket held on the other The spacer main body (second spacer main body) 31 on the separator 53 is in contact with the MEA 55 of the intermediate member 54 at positions where the two spacer main bodies 21 and 31 overlap on a plane, respectively. The pad main bodies 21 and 31 are each molded from a predetermined rubber-like elastic body or the like.

[0038] exist figure 1 The first pad main body 21 on the lower side includes a flat pad base 22 and a lip-shaped contact portion 23 with a mountain-shaped cross-section. Lip-shaped contact portion 23 . Further...

no. 2 example

[0043] Next, in the fuel cell gasket 11 according to the second embodiment, in addition to the structure similar to that of the above-described first embodiment, the respective separators 52 and 53 are provided with convex portions 57 and 58, The protruding portions 57 and 58 support the respective standard dimension fixing embankment portions 24 and 34 . For example, the protrusions 57 and 58 are formed into a hollow three-dimensional shape by punching a part of the metal separators 52 and 53 , and all or a part (all in the figure) are embedded in the standard size fixing embankments 24 and 34 .

[0044] Accordingly, according to this configuration, the embankments 24 and 34 for fixing the standard size of a relatively soft material are supported by the convex parts 57 and 58 of a relatively hard material, so that the embankment parts 24 and 34 for fixing the standard size can be prevented from collapsing.

[0045] For the thickness (height) dimension t of the convex portion...

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PUM

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Abstract

The present invention provides a fuel cell gasket capable of suppressing excessive compression of the gasket body in a structure in which contact portions of the gasket body are compressed so as to sandwich an intermediate member when battery cells are joined. In order to achieve this object, the fuel cell gasket is included in a fuel cell unit in which an intermediate member including an MEA is mounted between a pair of separators, and the fuel cell gasket is configured to be held by one of the pair of separators. The spacer main body on the separator and the spacer main body held on the other spacer are in contact with the intermediate member at positions where they overlap on a plane, and are characterized in that they are integrated on both sides or one side of the width direction of the two spacer bodies. There is a standard size fixed dike part based on the thickness of the pad. In addition, it is characterized in that the dike portion for fixing the standard size is supported by a convex portion provided on the partition plate.

Description

technical field [0001] The present invention relates to a gasket for a fuel cell constituting a sealing portion in a fuel cell. Background technique [0002] In the fuel cell gasket there are membrane face seals for sealing the ion exchange membrane and coolant seals for sealing the cooling side. As a method of assembling the gasket, there are the following methods: the gasket is integrally formed on battery cell components such as separators, MEAs, and GDLs; the gasket is integrally formed on a resin reinforcement with an adhesive material, and the gasket is attached to the separator. on battery cell components such as plates; and separately forming and assembling gaskets on battery cell components. As a method of joining a cell stack, there are a method of joining with a certain size (thickness dimension) and a method of joining according to a certain load. Among them, as the latter, in the method of joining according to a certain load, it is necessary to consider the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0271H01M8/0276H01M8/1004H01M50/77
CPCH01M8/10H01M8/0271H01M8/0254H01M8/0276Y02E60/50H01M8/1004H01M2008/1095
Inventor 堀本隆之由井元
Owner NOK CORP
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