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Proton exchange membrane fuel cell stack

A fuel cell stack and proton exchange membrane technology, applied in solid electrolyte fuel cells, fuel cell grouping, etc., can solve problems such as increased contact resistance, inconsistent degree of tightness, uneven contact between unipolar plates and current collectors, and achieve The effect of small contact resistance

Active Publication Date: 2008-02-13
咸宁京楚机械能源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires good contact between the unipolar plate and the current collector. However, the existing fuel cell stack achieves the purpose of pressing the end plate to fix the entire fuel cell stack by tightening the nuts on the connecting rods. The tightness of the nuts on the connecting rods is different, and the temperature of each part of the fuel cell stack is different during operation, resulting in inconsistent tightness of each part on the section of the fuel cell stack, resulting in uneven contact between the unipolar plate and the current collector, resulting in two The contact resistance between them increases and affects the output of the current

Method used

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  • Proton exchange membrane fuel cell stack
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Embodiment Construction

[0018] Below by accompanying drawing and embodiment the present invention will be further described:

[0019] As shown in Figures 1-4, a proton exchange membrane fuel cell stack according to the present invention includes a single cell group 1, a current collector 2, a gas collector plate 3, an end plate 4, and a connecting rod 5 and nuts 6, the single battery pack 1 includes unipolar plates 7 located at both ends thereof, on the outside of the unipolar plates 7, current collectors 2, gas collector plates 3 and end plates 4 are stacked in sequence, and the connecting rods 5 pass through through holes on the end plates 4 on both sides, and fasten the parts by tightening the nuts 6 on the connecting rods; The reaction gas through hole 72 around the electric area 71, the current collector 2 includes a metal plate 21 and a current lead-out terminal 22 located on the metal plate 21, and a concave cavity is provided on the side of the gas collector plate 3 opposite to the current co...

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Abstract

The present invention discloses a hydrion exchange membrane fuel cell pile. Fuel cell pile current collector includes a piece of metal flat plate and current leading out terminal, gaseous afflux plate set with one cavity, cavity bottom set with one through hole, gas passage set with gaseous afflux plate edge, monopole plate, elastic packing set between metal flat plate and gaseous afflux plate cavity lower wall to distribute uniformly the end plate pressure to current collector and monopole plate, thereby making both minimal contact resistance.

Description

1. Technical field [0001] The invention relates to a fuel cell stack, in particular to a proton exchange membrane fuel cell stack. 2. Background technology [0002] A proton exchange membrane fuel cell stack is a device that generates electricity through the electrochemical reaction of fuel and oxidant. The core component of the device is the membrane electrode (Membrane Electrode Assembly, referred to as MEA), which consists of two porous gas diffusion layers and a proton exchange membrane sandwiched between them. An electrochemical catalyst is attached on the interface of the proton exchange membrane and the gas diffusion layer (such as carbon paper). [0003] Another important part of the proton exchange membrane fuel cell stack is the guide plate. Both sides of the guide plate are connected to the membrane electrode, and the anode and cathode reactions occur simultaneously on both sides, which is called a bipolar plate. One side is close to the diversion plate of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/24H01M8/10
CPCY02E60/521Y02E60/50
Inventor 乔永进沈建跃曲平康新
Owner 咸宁京楚机械能源科技有限责任公司
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