Fuel cell system

A fuel cell system and fuel cell technology, applied in the direction of fuel cells, fuel cell additives, fuel cell grouping, etc., can solve problems such as uneven concentration and reduced power generation performance of battery stacks

Inactive Publication Date: 2011-08-03
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the configuration of Patent Document 1, there is a problem that the concentration of the reaction gas or the replacement gas in each unit cell in the cell stack becomes non-uniform, thereby reducing the power generation performance of the entire cell stack.

Method used

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  • Fuel cell system
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Examples

Experimental program
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Effect test

no. 2 Embodiment approach

[0172] Figure 6 It is a partial block diagram showing components for supplying fuel gas in the fuel cell system 200 of the present embodiment. Figure 7 is expressed in Figure 6 A diagram showing the flow direction of the fuel gas in the fuel gas supply manifold 106 , which is a component of the fuel cell system 200 . Figure 8 It is a partial block diagram showing components for supplying an oxidant gas in the fuel cell system 200 of the present embodiment. Figure 9 is expressed in Figure 8 The flow direction of the oxidant gas in the oxidant gas supply manifold 108 , which is a constituent element of the fuel cell system 200 , is shown. exist Figure 6 as well as Figure 8 in, for with figure 2 as well as Figure 4 The same or corresponding parts are marked with the same symbols, and their explanations are omitted.

[0173] In the fuel cell system 200 of this embodiment, instead of figure 2 The T-shaped pipe joint 224, the A-side fuel gas supply valve 225A, an...

Embodiment 1

[0212] As an example of the present invention, a fuel cell system 100 including a fuel cell 101 shown below and having the configuration shown in the first embodiment (including switching of the flow direction of the reactant gas) is manufactured.

[0213]Here, only the specific configuration of the fuel cell 101 is shown. A polymer electrolyte fuel cell is used as the fuel cell 101 . Other components of the fuel cell system 100 are configured in a well-known form.

[0214] First, methods for producing the anode and the cathode will be described.

[0215] Acetylene carbon black powder with a particle diameter of 35 nm [Nichiden Denka Industries: DENKA BLACK (registered trademark)] and an aqueous dispersion of PTFE (DAIKIN: D-1) were mixed and prepared to contain a dry weight of 20 Mixture of wt% PTFE. Then, the mixed solution was coated on carbon paper (manufactured by TORAY: TGPH060H) and impregnated, and heat-treated at 300° C. using a hot air dryer to form a gas diffusio...

Embodiment 2

[0227] A fuel cell system 200 having the configuration (including switching of the flow direction of the reactant gas) shown in the second embodiment was fabricated using the same cell stack as the single cell stack shown in the above-mentioned Example 1. As for other operating conditions, it is all the same as the above-mentioned embodiment 1.

[0228] Then, using power generation and stop as a cycle, set the power generation time to 1 hour, set the stop time to 1 hour, and repeat the operation for 1000 cycles. Then, the voltage of each unit cell was measured, and this was used as the basis for evaluating the power generation performance. The measured value of the voltage of each cell is expressed in Figure 19 middle. In addition, the average cell voltage and its standard deviation of all the cells are shown in Table 1.

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Abstract

The present invention relates to a fuel cell system (100) comprising a fuel cell (101), which is provided with a first fuel gas inlet (121A) communicating with one end of a fuel gas supply manifold (106) and a second fuel gas inlet (121B) communicating with the other end of the fuel gas supply manifold (106), while having a structure for generating electricity by reacting a fuel gas and an oxidant gas, a fuel gas supply device (120) for supplying the fuel gas, and a fuel gas inlet selecting device (211) for selectively supplying the fuel gas from the fuel gas supply device (120) to the first fuel gas inlet (121A) or the second fuel gas inlet (121B).

Description

technical field [0001] The present invention relates to a fuel cell system for a household cogeneration system or a power source for automobiles that repeatedly generates and stops power generation, and particularly relates to a fuel cell system using a polymer electrolyte fuel cell. Background technique [0002] A typical fuel cell includes a polymer electrolyte fuel cell. In this polymer electrolyte fuel cell, an anode and a cathode are disposed with a polymer electrolyte membrane interposed therebetween. A hydrogen-containing fuel gas and an oxygen-containing oxidizing gas such as air are supplied to the anode and the cathode, respectively (hereinafter, the fuel gas and the oxidizing gas may be collectively referred to as reaction gas). Furthermore, by electrochemically reacting the fuel gas and the oxidant gas, electricity and heat are simultaneously generated. [0003] Specifically, a polymer electrolyte fuel cell includes a polymer electrolyte membrane that selective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04H01M8/10H01M8/24
CPCY02E60/50H01M8/2465H01M8/04223Y02T90/32H01M2250/20H01M2008/1095H01M8/04201H01M8/04231Y02T90/40H01M8/241H01M8/04303H01M8/04302H01M8/04228H01M8/04225
Inventor 森田纯司菅原靖柴田础一
Owner PANASONIC CORP
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