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Fuel Cell Sealing Device

A fuel cell and sealing device technology, which is applied to fuel cells, circuits, electrical components, etc., can solve problems such as sealing failure and high working pressure, and achieve the effects of improving sealing performance, ensuring structural stability, and improving safety in use

Active Publication Date: 2022-03-11
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But at present, the only limitation to increase the working pressure of the battery is the structure of the fuel cell. The above-mentioned conventional sealing structure cannot withstand high working pressure, and the problem of sealing failure is prone to occur.

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] Please see attached figure 1 to attach Figure 4 , a sealing device for a fuel cell, comprising an oxygen flow field plate 12, a membrane electrode 13 and a hydrogen flow field plate 14, the oxygen flow field plate 12 and the hydrogen flow field plate 14 are all provided with a sealing groove 11, and the sealing groove 11 is provided with There is a sealing strip 7, and the oxygen flow field plate 12 is connected to the hydrogen flow field plate 14 through the membrane electrode 13 through the sealing strip 7 to form the main body of the fuel cell; both the oxygen flow field plate 12 and the hydrogen flow field plate 14 are provided with oxygen / air inlets 1. Oxygen / air outlet 2, coolant inlet 3, coolant outlet 4, hydrogen inlet 5 and hydrogen outlet 6, the oxygen / air inlet 1 and oxygen / air outlet 2 of the oxygen flow field plate 12 are ...

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Abstract

The invention discloses a fuel cell sealing device, which comprises an oxygen flow field plate (12), a membrane electrode (13) and a hydrogen flow field plate (14). The oxygen flow field plate and the hydrogen flow field plate are provided with sealing grooves (11 ), a sealing strip (7) is provided in the sealing groove, oxygen / air inlet (1), oxygen / air outlet (2), coolant inlet (3), and coolant outlet are arranged on the oxygen flow field plate and the hydrogen flow field plate (4), hydrogen inlet (5) and hydrogen outlet (6); there is a reaction channel (8) between the oxygen / air inlet and oxygen / air outlet of the oxygen flow field plate, and the hydrogen inlet and hydrogen outlet of the hydrogen flow field plate There is a reaction flow channel between them; a gas channel (9) is buried deep in the sealing groove, the gas channel is separated from the sealing groove by a partition and is not connected, and the partition is pressed on the sealing strip (7), so that the sealing strip is pressed against the membrane electrode superior. The invention realizes the self-tight sealing of the oxygen flow field plate, the membrane electrode and the hydrogen flow field plate by extruding the sealing strip by the high-pressure gas.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a fuel cell sealing device. Background technique [0002] The sealing design of the proton exchange membrane fuel cell (PEMFC) is one of the keys to the fuel cell design, and it is especially important for the sealing of the reaction gas. On the one hand, it can reduce gas leakage and improve fuel utilization; on the other hand, it can reduce hydrogen leakage. , to avoid hydrogen safety issues. [0003] The working pressure of the fuel cell directly affects the performance. Increasing the working pressure of the battery will lead to an increase in the gas concentration at the reaction interface, and the exchange current density will also increase. Based on the Nernst equation, it can be known that the battery potential increases, which is conducive to improving the battery work. efficiency. For high-pressure sealing design, commonly used methods can be divided into the following categories: [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0258H01M8/0276H01M8/0271
CPCH01M8/0258H01M8/0271H01M8/0276Y02E60/50
Inventor 蒋永伟唐子威靳宏建李名剑
Owner SAIC MOTOR
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