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A fuel cell metal bipolar plate assembly with enhanced fluid uniformity

A metal bipolar plate and fuel cell technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of fuel cell mass power density that is difficult to further improve, uneven concentration distribution, and increase the weight of bipolar plates. Achieve the effects of novel structural design, compensation concentration reduction, and pressure loss reduction

Active Publication Date: 2019-07-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the metal bipolar plate of this invention is composed of four metal thin plates, which increases the weight of the bipolar plate and makes it difficult to further improve the mass power density of the fuel cell.
To sum up, the existing inventions do not take into account the uneven concentration distribution caused by the consumption of reaction gases or their improved methods are not suitable for mass and rapid manufacturing of metal bipolar plates

Method used

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  • A fuel cell metal bipolar plate assembly with enhanced fluid uniformity
  • A fuel cell metal bipolar plate assembly with enhanced fluid uniformity
  • A fuel cell metal bipolar plate assembly with enhanced fluid uniformity

Examples

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Embodiment

[0042] like Figure 1-5 As shown, a fuel cell metal bipolar plate assembly that enhances fluid uniformity includes a cathode single plate 1, an anode single plate 3, and a seal 2 assembled on the outside of the cathode single plate 1 and the anode single plate 3, respectively. The cavity between the anode single plate 3 and the cathode single plate 1 forms a coolant flow field, and the outer sides of the cathode single plate 1 and the anode single plate 3 respectively form a cathode flow field and an anode flow field. The cathode veneer 1 and the anode veneer 3 are obtained by stamping, punching and trimming a stainless steel sheet with a thickness of 0.1 mm. The cathode veneer 1 and the anode veneer 3 are identical and can be manufactured by the same mold. After the two single plates are assembled and bonded, they are laser welded to form a bipolar plate.

[0043] Among them, the cathode flow field includes a cathode inlet main pipeline 101, a cathode inlet direct connectio...

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Abstract

The invention relates to a fuel cell metal dual pole plate assembly for enhancing the fluid uniformity. The assembly is formed by connecting a single negative plate and a single positive plate, wherein the single negative plate and the single positive plate are prepared from metal sheets and have runners with different heights. After connection, sealing members are installed in sealing grooves on two sides of the two pole plates. Cathode gas, anode gas, and coolant can enter into / exit from corresponding flow fields from respective main pipelines through a direct connection channel. The heights of runners in the cathode and anode flow field reaction zones both decrease along the flowing direction of the cathode gas and anode gas. Compared with the prior art, the provided assembly can compensate the gas loss so as to avoid uneven gas distribution; the electrochemical reaction activity in a fuel cell is improved therefore, and moreover, the flowing speed of reaction gas in the flow field outlet area is accelerated so that the generated liquid water in the air runner can be discharged in time when the fuel cell is in a high current density state.

Description

technical field [0001] The invention belongs to the technical field of fuel cells and relates to a fuel cell metal bipolar plate assembly for enhancing fluid uniformity. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a power generation device that directly converts the chemical energy in hydrogen into electrical energy, and its power generation efficiency can reach more than 50%. The only product during the operation of the proton exchange membrane fuel cell is water, which is very friendly to the environment. At the same time, it has the characteristics of fast start-up, low operating temperature, and low noise. It is an ideal power source for future cars and drones. Proton exchange membrane fuel cells are mainly composed of bipolar plates, membrane electrode assemblies and sealing elements. As the core component of the fuel cell, the bipolar plate accounts for a large part of the mass and cost of the battery pack. A typical bipolar plate has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86
CPCH01M4/86Y02E60/50
Inventor 彭林法邵恒徐一凡易培云来新民
Owner SHANGHAI JIAOTONG UNIV
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