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Full-through-hole metal fiber sintered body fuel cell bipolar plate and fuel cell stack

A metal fiber, fuel cell technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems of easy tearing, increase the difficulty of the stack, low yield, etc., to increase the reaction area, improve volume power, and assembly difficulty. low effect

Active Publication Date: 2021-05-25
WESTERN METAL MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this wavy structure is easy to tear when the mold is stamped, and the yield is low; in addition, this kind of electrodeless plate fuel cell divides the oxidant and fuel through the wavy membrane electrode. It is adjacent to the positive pole, and the negative pole is adjacent to the negative pole. It needs special wires to be misplaced and connected in series, which increases the difficulty of stack assembly.

Method used

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  • Full-through-hole metal fiber sintered body fuel cell bipolar plate and fuel cell stack
  • Full-through-hole metal fiber sintered body fuel cell bipolar plate and fuel cell stack
  • Full-through-hole metal fiber sintered body fuel cell bipolar plate and fuel cell stack

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Embodiment 1

[0033]This example provides a full-hole metal fiber sintered body fuel cell bipolar plate, such asFigure 1-2 As shown, including the conductive partition plate 1 and the flow field plate 2, the flow field plate 2 is provided on one or both sides of the conductive partition plate 1, and the flow field plate 2 is provided when the conductive partition plate 1 is constituted. Unipolar board, two monopole plates are bipolar plates (such asfigure 1 As shown in, the conductive partition plate 1 constitutes a bipolar panel when the flow field plate 2 is provided on both sides.figure 2 Designed, the flow field plate 2 is a metal fiber flake plate made of a metal fiber sintered body, and the flow field plate 2 is integrated with the conductive partition plate 1 integrated sintering or welded connection or rubber connection.

[0034]In this embodiment, the flow field plate 2 and the conductive partition plate 1 can be directly connected or indirectly connected, and the direct connection includes...

Embodiment 2

[0041]This embodiment provides a fuel cell stack including a series body of a single battery, a battery stack, a cooling layer between a series single cell, and a single battery, a cooling layer, a sealing gasket between the end plates. It also includes a bolt hole and a corresponding bolt reserved for assembly; wherein the single battery is composed of a total-through-hole metal fiber flask fuel cell, and a membrane electrode and a sealing ring; the cooling layer is made of metal. The fiber mat is composed, the cooling layer is 0.1 mm to 5 mm, and the metal fiber mat constituting the cooling layer is a stainless steel fiber felt or titanium fiber felt or titanium alloy fiber felt or copper alloy fiber felt; a metal fiber felt constituting a cooling layer in a fuel cell stack The arrangement is determined according to the cooling effect, and a certain number of unit cells are arranged in a single battery, and the cooling water is turbulence in a metal fiber felt three-dimensional me...

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Abstract

The invention discloses a full-through-hole metal fiber sintered body fuel cell bipolar plate and a fuel cell stack, the full-through-hole metal fiber sintered body fuel cell bipolar plate comprises a conductive partition plate and a flow field plate, the flow field plate is arranged on one side or two sides of the conductive partition plate, and the flow field plate is made of a metal fiber sintered body; the flow field plate and the conductive partition plate are in integrated sintering connection, welding connection or cementing connection. According to the all-through-hole metal fiber sintered body fuel cell bipolar plate and the fuel cell stack provided by the invention, the metal fiber sintered body is adopted as the flow field plate, so that fluid diffusion is uniform, the effective reaction area of gas is doubled, and the power density of the cell is improved; the metal fiber felt serves as a cooling channel of the cell stack, so that the cooling efficiency is improved; the cell stack volume is reduced; and the cell stack volume power is improved.

Description

Technical field[0001]The present invention relates to the field of fuel cell technology, and more particularly to a full-through-hole metal fiber sintered body fuel cell bipolar plate and a fuel cell stack.Background technique[0002]The proton exchange membrane fuel cell (PEMFC) is an apparatus for converting chemical energy, high conversion efficiency, zero emissions such as hydrogen or purifying recombeid gas. Being an important development direction that solves the energy crisis. Typical PEMFC is composed of a film electrode assembly (MEA), a bipolar plate (BP) end plate, fastener, and sealing element, and the like. The membrane electrode assembly includes a gas diffusion layer, a proton exchange membrane, and a catalytic layer. The bipolar plate functional structure includes a flow field plate and a current collecting plate, wherein the flow field is a flow field passage of the fuel and an oxidant, and the collector collecting electrons is a current passage between the electrode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0232H01M8/0245H01M8/1004H01M8/2465
CPCH01M8/0245H01M8/0232H01M8/1004H01M8/2465Y02E60/50
Inventor 葛鹏高建平卢广轩王晓哲张欢
Owner WESTERN METAL MATERIAL
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