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Fuel cell

A fuel cell and porous material technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as inability to uniformly squeeze out generated water, and achieve the effect of improving gas supply

Inactive Publication Date: 2005-09-07
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, the cathode flow is composed of mountains (peaks) and valleys (valleys), so the permeation of the produced water is different in the parts of the mountains and valleys, and the produced water cannot be squeezed out uniformly.

Method used

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Embodiment 6

[0091] Embodiment 6 of the present invention, such as Figure 9 ( figure 2 A-A profile), Figure 10 ( figure 2 As shown in the B-B section of the porous part 32, at least one of the gas flow path (in the Figure 9 , 10 The center is the flow path on both sides), which is composed of grooves formed between the mountain portions 46, and only the mountain portion (the part from the groove bottom to the tip side) 46 in the porous portion 32 is set to be smaller than the porous portion 32. Other portions of portion 32 (parts other than mountain portion 46 , that is, the portion between the groove bottom of reactant gas flow path 28 (or 27 ) and the groove bottom of cooling gas flow path 33 ) have large pore diameters and porosity. Figure 9 Indicates that the pore diameter and porosity of the mountain portion 46 of the reaction gas flow path 28 (or 27) are larger than those of other portions, Figure 10 It shows that the hole diameter and porosity of the mountain portion 46 ...

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PUM

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Abstract

In a fuel cell, a porous portion (32) is formed in a separator. At a surface of the porous portion opposite to a surface where a reactant gas passage is formed, a cooling gas passage (33) is formed. The cooling gas passage (33) may be fluidly connected to a reactant gas supply passage for supplying reactant gas to the fuel cell. The cooling gas passage (33) is controllable in flow amount. The porous portion (32) is formed only in a separator portion where a downstream portion of the reactant gas passage (27, 28) is located. At a separator portion where an upstream portion of the reactant gas passage (27, 28) is located, a coolant passage (26) is formed. A rib and a rib-bottom portion have a great porosity. A groove may be filled with porous material (49). The porous portion may be replaced by a water exchange portion (32'). A portion of the separator other than the region of the porous portion may be made by porous material (51). Due to these, a fuel cell can be obtained where removal of product water is improved, product water can be utilized for humidifying gas, and product water can be uniformly removed.

Description

technical field [0001] The present invention relates to a fuel cell, and more particularly, to a solid polymer electrolyte fuel cell capable of discharging generated water well. Background technique [0002] A solid polymer electrolyte fuel cell is composed of a laminate of a membrane-electrode assembly (MEA: Membrane-Electrode Assembly) and a separator. The membrane-electrode assembly includes an electrolyte membrane composed of an ion exchange membrane, an electrode (anode) composed of a catalyst layer disposed on one side of the electrolyte membrane, and an electrode composed of a catalyst layer disposed on the other side of the electrolyte membrane ( cathode). A fuel gas flow path for supplying fuel gas (hydrogen gas) to the anode, or an oxidizing gas flow path for supplying an oxidizing gas (oxygen, usually air) to the cathode, and / or flow cooling are formed on the separator. Refrigerant (usually cooling water) refrigerant flow path. Between the membrane-electrode as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0228H01M8/023H01M8/0258H01M8/0267H01M8/04014H01M8/04089H01M8/04119
CPCY02E60/521Y02E60/50
Inventor 佐野诚治荒木康
Owner TOYOTA JIDOSHA KK