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Polymer electrolyte fuel cell and fuel cell stack including same

A polymer electrolyte and fuel cell technology, which is applied to fuel cell parts, fuel cells, battery electrodes, etc., can solve problems such as increasing inhomogeneity and increasing inhomogeneity of power generation.

Active Publication Date: 2016-01-27
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the non-uniformity of the water content in the local part of the electrode becomes large, and as a result, the non-uniformity of the power generation amount in the local part becomes large.

Method used

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  • Polymer electrolyte fuel cell and fuel cell stack including same
  • Polymer electrolyte fuel cell and fuel cell stack including same
  • Polymer electrolyte fuel cell and fuel cell stack including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0159] [Structure of fuel cell stack]

[0160] figure 1 It is a perspective view schematically showing a schematic configuration of the fuel cell stack according to Embodiment 1 of the present invention. Also, in figure 1 In , the up-down direction of the fuel cell stack is shown as the up-down direction in the figure.

[0161] like figure 1As shown, the fuel cell stack 61 according to Embodiment 1 of the present invention includes a unitary structure in which polymer electrolyte fuel cells (hereinafter simply referred to as fuel cells) 100 having a plate-like overall shape are stacked in the thickness direction. The cell stack 62 , the first and second end plates 63 and 64 arranged at both ends of the unit cell stack 62 , and the unit cell stack 62 and the first and second end plates are fastened in the stacking direction of the fuel cell 100 63,64 are not shown fastening joints. In addition, a collector plate and an insulating plate are respectively provided on the f...

Embodiment approach 2

[0217] Figure 9 It is a schematic view showing a cathode electrode superimposed on a cathode separator of a fuel cell stack according to Embodiment 2 of the present invention and viewed from the thickness direction of the cathode separator. Figure 10 It is a schematic diagram showing the schematic structure of the inner surface of the anode separator of the fuel cell stack according to Embodiment 2 of the present invention. Figure 11 It is a schematic diagram showing a schematic configuration of a fuel cell according to Embodiment 2 of the present invention. Also, in Figure 9 In , the up-down direction on the cathode separator is represented as the up-down direction in the figure, and in Figure 10 In , the up-down direction on the anode separator is shown as the up-down direction in the figure. Also, in Figure 9 as well as Figure 10 In , the coolant supply manifold hole and the coolant discharge manifold hole are omitted. In addition, in Figure 11 In , only a pa...

Embodiment approach 3

[0225] Figure 12 It is a schematic view showing a cathode electrode superimposed on a cathode separator of a fuel cell stack according to Embodiment 3 of the present invention and viewed from the thickness direction of the cathode separator. Figure 13 It is a schematic diagram showing the schematic structure of the inner surface of the anode separator of the fuel cell stack according to Embodiment 3 of the present invention. Figure 14 It is a schematic diagram showing a schematic configuration of a fuel cell according to Embodiment 3 of the present invention. Also, in Figure 12 In , the up-down direction on the cathode separator is represented as the up-down direction in the figure, and in Figure 13 In , the up-down direction on the anode separator is shown as the up-down direction in the figure. In addition, in Figure 12 as well as Figure 13 In , the coolant supply manifold hole and the coolant discharge manifold hole are omitted. In addition, in Figure 14 In ,...

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PUM

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Abstract

The polymer electrolyte fuel cell according to the present invention comprises a membrane electrode assembly (5), a first separator (6a), and a second separator (6b); between the first separator (6a) and the first electrode (4a ) is in contact with a main surface with a plurality of linear first ribs (11) in parallel to form a groove-like first reaction gas flow channel (8); on the second electrode (4b) and the first A groove-shaped second reaction gas flow channel (9) is formed on one main surface of the contacting one of the separators (6b) in parallel with a plurality of linear second ribs (12); the first reaction gas flow The ratio of the first reactant gas flow path width to the second rib (12) at least in the upstream portion (18b) of the path (8) is greater than 0 and not greater than 1.

Description

technical field [0001] The present invention relates to the structure of a polymer electrolyte fuel cell and a fuel cell stack including the same, and particularly relates to the structure of a separator and a gas diffusion electrode of a polymer electrolyte fuel cell. Background technique [0002] In recent years, fuel cells have been widely concerned as a clean energy source. Examples of fuel cells include polymer electrolyte fuel cells. A polymer electrolyte fuel cell (hereinafter referred to as PEFC) includes a membrane-electrode assembly, an anode separator and a cathode separator arranged to sandwich the membrane-electrode assembly and to be in contact with an anode and a cathode, respectively. The membrane-electrode assembly includes an anode and a cathode each composed of a gas diffusion layer and a catalyst layer (these are referred to as electrodes). In the gas diffusion layer, there are fine pores serving as passages for the reaction gas to flow. A fuel gas flo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1004H01M8/0258H01M8/026H01M8/0265
CPCH01M4/8605H01M8/0258H01M8/026H01M8/0265H01M8/1004H01M8/241H01M2008/1095H01M8/2483H01M8/2484Y02E60/50
Inventor 冈西岳太小足直嗣辻庸一郎
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD