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Cell stack of fuel cells and method for fastening cell stack of fuel cells

A fuel cell and cell stack technology, which is applied in the field of fuel cell stacks and the fastening of fuel cell stacks, can solve the problems of increasing the size of fuel cells, and achieve the effects of no damage to performance and miniaturized surface area.

Active Publication Date: 2011-08-31
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the fastening structure using the above fastening rods (bolts and nuts), there is a problem that the size of the fuel cell becomes large because the heads, front ends, and nuts of the bolts protrude from the surface of the end plate.

Method used

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  • Cell stack of fuel cells and method for fastening cell stack of fuel cells
  • Cell stack of fuel cells and method for fastening cell stack of fuel cells
  • Cell stack of fuel cells and method for fastening cell stack of fuel cells

Examples

Experimental program
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Effect test

Embodiment approach 1

[0053] [Structure of cell stack of fuel cell]

[0054] figure 1 is a perspective view schematically showing a schematic structure of a fuel cell stack according to Embodiment 1 of the present invention, figure 2 will be figure 1 An exploded schematic view of the cell stack of the fuel cell shown. In addition, in figure 1 and figure 2 In , the up-down direction in the cell stack of the fuel cell is represented as the up-down direction in the figure.

[0055] Such as figure 1 and figure 2 As shown, the fuel cell stack 100 according to Embodiment 1 of the present invention includes a cuboid stack body 50 , a U-shaped first band member 60 and a U-shaped second band member 70 for fastening. Belt 80 and a pair of dowel pins 90,90. The first belt member 60 and the second belt member 70 are arranged to cover the upper surface (upper end surface), lower surface (lower end surface) and a pair of opposite side surfaces of the battery stack body 50 and extend around the battery...

Embodiment approach 2

[0099] Figure 5 It is a perspective view schematically showing a schematic structure of a fuel cell stack according to Embodiment 2 of the present invention. Figure 6 will be Figure 5 Schematic diagram of an exploded cell stack for the fuel cell shown. In addition, in Figure 5 and Figure 6 In , the up-down direction in the cell stack of the fuel cell is represented as the up-down direction in the figure.

[0100] Such as Figure 5 and Figure 6 As shown, the fuel cell stack 100 according to the second embodiment of the present invention has the same basic structure as the fuel cell stack 100 according to the first embodiment. The structure of the component joint 72 is different.

[0101] Specifically, in the fuel cell stack 100 according to Embodiment 2, the elastic member 33 is formed of a compression spring. Moreover, the 1st belt member joining part 61 - the 4th belt member joining part 72 have a plurality (here, seven pieces) of joining units 66, 76 formed in ...

Embodiment approach 3

[0105] Figure 7 It is a perspective view schematically showing a schematic structure of a fuel cell stack according to Embodiment 3 of the present invention. Figure 8 It is a pattern that expresses the composition Figure 7 It is a perspective view showing a schematic structure of a first belt member and a second belt member of a cell stack of the fuel cell shown. In addition, in Figure 7 In the figure, the up-down direction in the cell stack of the fuel cell is represented as the up-down direction in the figure, and in Figure 8 , the vertical direction among the first belt member and the second belt member is shown as the vertical direction in the figure.

[0106] Such as Figure 7 and Figure 8 As shown, the fuel cell stack 100 according to Embodiment 3 of the present invention has the same basic structure as the fuel cell stack 100 according to Embodiment 1. 72 is different in that it is not constituted by the joining forming portions 63 and 73 but is constituted ...

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Abstract

A cell stack of fuel cells is provided with: a cell stack body (50) having a stack of cells (20), an elastic member (33) arranged at the end of a cell (10) of the stack of cells (20) in the stacking direction, and a pair of end plates (34, 34) which sandwich the stack of cells (20) and the elastic member (33); and with a fastening band (80) which has a first band engaging section (68) and a second band engaging section (78) on both end sections and which extends around the cell stack body (50) so as to cover the pair of side surfaces facing the pair of entire end surfaces of the cell stack body (50). The cell stack body (50) is fastened by means of the fastening band (80) by direct or indirect engagement of the first band engaging section (68) and the second band engaging section (78).

Description

technical field [0001] The present invention relates to a fuel cell stack and a fastening method for the fuel cell stack, and relates to a fuel cell stack and a fastening method for fastening a fuel cell stack main body using a fastening belt. Background technique [0002] Generally, the battery stack of a fuel cell is provided with a collector plate, an insulating plate, and an end plate in sequence at both ends of a battery stack in which a plurality of cells (single cells) are stacked, and is tightened in the stacking direction by fastening rods (bolts and nuts). The above-mentioned laminated body is fastened and constituted (for example, refer patent document 1). In the fastening structure using the above-mentioned fastening rods (bolts and nuts), there is a problem that the size of the fuel cell increases because the heads, front ends, and nuts of the bolts protrude from the surface of the end plate. [0003] Therefore, various developments have been made to downsize t...

Claims

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Application Information

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IPC IPC(8): H01M8/24H01M8/10
CPCH01M2008/1095H01M8/2475H01M8/248Y02E60/50
Inventor 柴田础一日下部弘树鹈木重幸长尾善辉川畑德彦池岛裕介
Owner PANASONIC CORP
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