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Separator for fuel batteries and fuel batteries

A technology of fuel cells and separators, which is applied in the direction of fuel cells, fuel cell groups, fuel cell components, etc. It can solve the problems of overlapping molded products 120, inability to arrange molded products, and poor positioning accuracy.

Inactive Publication Date: 2011-06-08
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when Figure 25B When the resin burrs are generated in a direction approximately parallel to one surface 120A of the molded product 120 as shown, the positioning accuracy deteriorates, and there is a problem that the molded products 120 cannot be superimposed with high precision.
[0017] In addition, the above-mentioned resin burrs are generated not only in the outer peripheral part of the molded product, but also in the through hole in the surface of the molded product, etc.
Therefore, similar to the above, there is a problem that the molded products cannot be placed in sufficient contact with or close to each other due to the resin burr formed in the through hole portion.
[0018] In addition, in order to remove these resin burrs, a complicated burr removal process is required

Method used

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  • Separator for fuel batteries and fuel batteries
  • Separator for fuel batteries and fuel batteries
  • Separator for fuel batteries and fuel batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0077] figure 1 as well as figure 2 It is a plan view and a rear view schematically showing the structure of the fuel cell separator according to Embodiment 1 of the present invention, image 3 yes figure 1 as well as figure 2 A schematic sectional view of line III-III. Figure 4 is enlarged image 3 A schematic cross-sectional view of area Q1 in . Figure 5 Zoom in Figure 4 A schematic cross-sectional view of the flash in area Q2.

[0078] refer to Figure 1 ~ Figure 3 , the fuel cell separator 1 has a rectangular planar shape, and has one surface 1A and the other surface 1B opposed to each other. The fuel cell separator 1 has holes 2 a and 2 b for manifolds penetrating between one surface 1A and the other surface 1B. In addition, flow paths 3 for gas or the like are formed on the one surface 1A and the other surface 1B so as to communicate with the holes 2 a and 2 b.

[0079] On one surface 1A, flashes 4 , 4 a protruding in a direction intersecting one surface...

Embodiment approach 2

[0115] Figure 10 It is a partially broken cross-sectional view schematically showing the structure of a fuel cell separator according to Embodiment 2 of the present invention. Figure 11 It means overlapping Figure 10 A schematic cross-sectional view of the state of the fuel cell separator shown. Figure 12 is enlarged Figure 11 A schematic cross-sectional view of the area Q5 in .

[0116] The fuel cell separator 1 according to the present embodiment differs from the structure of the first embodiment in the shape of the groove portion. refer to Figure 10 ~ Figure 12 The groove portion 5b formed on the outer peripheral edge portion of the separator 1 in this embodiment is such that the width of the fuel cell separator 1 becomes smaller from the one surface 1A side of the separator 1 toward the other surface 1B side. conical notches. Thus, if Figure 10 As shown, the width W2 of the other surface 1B side of the separator 1 is smaller than the width W1 of the one surfa...

Embodiment approach 3

[0128] Figure 14 In the structure of the fuel cell separator according to Embodiment 3 of the present invention, and image 3 A schematic cross-sectional view of the part corresponding to the region Q1. Figure 15 Indicates overlapping Figure 14 A schematic cross-sectional view of the state of the fuel cell separator shown, Figure 16 Zoom in Figure 15 A schematic cross-sectional view of the area Q6 in .

[0129] The fuel cell separator 1 according to the present embodiment has a shape of the groove portion which is different from the structure of the groove portion in the first embodiment. refer to Figure 14 ~ Figure 16 The groove portion 5c in this embodiment is a notch formed to have a radius of curvature R at the corners of the outer peripheral portion of the fuel cell separator 1 and the peripheral portions of the holes 2a, 2b. Such as Figure 14 As shown, the curvature radius R of the groove portion 5 c is made larger than the curvature radius r of the flash 4...

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Abstract

A fuel cell bipolar plate (1) has a front surface (1A) and a rear surface (1B) opposite to each other, and flash (4) and a receding portion (5a). The flash (4) is provided on the front surface (1A) atA fuel cell bipolar plate (1) has a front surface (1A) and a rear surface (1B) opposite to each other, and flash (4) and a receding portion (5a). The flash (4) is provided on the front surface (1A) atan outer peripheral portion of the bipolar plate (1) and projects in a direction crossing the front surface (1A). The receding portion (5a) is provided on the rear surface (1B) at an outer peripheral an outer peripheral portion of the bipolar plate (1) and projects in a direction crossing the front surface (1A). The receding portion (5a) is provided on the rear surface (1B) at an outer peripheral portion of the bipolar plate (I) in a geometry capable of accommodating flash (4).portion of the bipolar plate (I) in a geometry capable of accommodating flash (4).

Description

technical field [0001] The invention relates to a fuel cell separator and a fuel cell. Background technique [0002] Among fuel cells that obtain electric power through the electrochemical reaction of hydrogen and oxygen, the applicability to various applications such as portable devices and automobiles has been studied in recent years. A fuel cell generally has a structure in which tens to hundreds of single cells are stacked in series, and the unit cell is a basic structural unit composed of an electrolyte membrane, electrodes, and separators. In a general method of manufacturing a fuel cell, an electrolyte membrane and electrodes are formed in advance as an electrolyte membrane / electrode assembly (MEA: Membrane Electrode Assembly), and a separator is disposed on the electrolyte membrane / electrode assembly. As the separator, at least one surface thereof has flow paths for supplying fuel such as hydrogen, an oxidizing agent composed of air or oxygen, and refrigerant for co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/24H01M8/02H01M50/77
CPCY02E60/50H01M8/1011Y02E60/523H01M8/242H01M2008/1095H01M8/0297H01M8/086H01M8/026H01M8/02H01M4/86H01M8/10H01M8/0263H01M8/0267H01M8/0258H01M8/2483H01M8/241
Inventor 蒋建业原田哲哉
Owner DIC CORP