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Bipolar plate for hydrogen fuel cell

A fuel cell and bipolar plate technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve problems affecting the initial working efficiency of bipolar plates, high expansion rate of graphite plates, and damage to proton membranes, etc., to achieve improved Effects of initial work efficiency, enhanced shockproof performance, and guaranteed accuracy

Pending Publication Date: 2021-09-28
瑞达新能源(广州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the working process, the graphite plate is easy to absorb the moisture contained in the gas, resulting in a high expansion rate, which greatly affects the initial working efficiency of the bipolar plate and increases the probability of destroying the proton membrane.

Method used

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  • Bipolar plate for hydrogen fuel cell
  • Bipolar plate for hydrogen fuel cell
  • Bipolar plate for hydrogen fuel cell

Examples

Experimental program
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Effect test

Embodiment

[0040] Please refer to Figure 1-Figure 7, this embodiment provides a hydrogen fuel cell bipolar plate, which includes an anode plate 110 and a cathode plate 120 . The gap between the porous graphite plates of the anode plate 110 and the cathode plate 120 is filled with fluorine gap filler (not shown in the figure). The above-mentioned fluorine caulking material can make the bipolar pole hydrophobic, so that the bipolar plate does not absorb water, reduces the expansion rate, prevents the graphite plate from being broken due to excessive expansion pressure in the confined space, and ensures the accuracy. Because the moisture contained in the gas is not absorbed by the bipolar plate during the initial work, it greatly improves the initial work efficiency and protects the battery from thirst and damage to the proton membrane during the initial work. In addition, the above-mentioned fluorine-based caulking material can withstand a temperature range of minus 35°C-260°C, which can...

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Abstract

The invention discloses a bipolar plate for a hydrogen fuel cell and relates to the technical field of hydrogen fuel cell design and manufacturing. The bipolar plate for the hydrogen fuel cell comprises an anode plate and a cathode plate, a gap between porous graphite plates of the anode plate and the cathode plate is filled with a fluorine joint filling material; the back surface of the anode plate and the back surface of the cathode plate are coupled to form a cooling flow field; when the back surfaces of the anode plate and the cathode plate are coupled, a first anode branch port and a second anode branch port form a first connecting line, a first cathode branch port and a second cathode branch port form a second connecting line, and the first connecting line and the second connecting line are arranged in a crossed manner; the groove of an anode flow field and the groove of a cooling flow field are arranged in an offset manner; and the groove of the cathode flow field and the groove of the cooling flow field are arranged in an offset manner. According to the bipolar plate for the hydrogen fuel cell, the gap of the porous graphite plates are filled with the fluorine gap filling material, so that the moisture absorption of the graphite plates is reduced, the expansion rate is reduced, the graphite plates are prevented from being broken due to overlarge expansion pressure in a limited space, the initial working efficiency is improved to a great extent, and a proton membrane is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of hydrogen fuel cells, in particular to a bipolar plate for hydrogen fuel cells. Background technique [0002] A hydrogen fuel cell is an environmentally friendly battery with controllable output power that uses hydrogen and oxygen to react chemically with a catalyst to generate electricity and water. The basic principle is the reverse reaction of electrolyzed water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the catalyst, negative electrons are released to reach the cathode through the external load. As a new type of power source, hydrogen fuel cells have the characteristics of high efficiency, no pollution, no noise, and continuous operation that ordinary fuel cells have, and have the advantages of high power density, low operating temperature, fast start-up, and long service life. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0243H01M8/0234H01M8/0239H01M8/026H01M8/1004
CPCH01M8/0243H01M8/0234H01M8/0239H01M8/026H01M8/1004Y02E60/50Y02P70/50
Inventor 叶士海何海平刘映红邹海平
Owner 瑞达新能源(广州)有限公司
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