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A high-efficiency full-screen flow field bipolar plate for fuel cell and its cell stack

A fuel cell and bipolar plate technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of low effective area ratio and large area ratio of the power generation part, so as to enhance design flexibility, improve production efficiency, and improve Effect of effective area ratio

Active Publication Date: 2020-12-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional bipolar plate design, the fuel, air and coolant inlet and outlet frames are generally designed in the plane of the bipolar plate, and the sealing needs to be designed around these inlet and outlet frames, and the flow field of the effective part of power generation is located in these designed places. Surrounded by the interior, which makes the traditional bipolar plate inlet and outlet and its sealing area account for a large proportion, and the effective area ratio of the power generation part is low

Method used

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  • A high-efficiency full-screen flow field bipolar plate for fuel cell and its cell stack
  • A high-efficiency full-screen flow field bipolar plate for fuel cell and its cell stack
  • A high-efficiency full-screen flow field bipolar plate for fuel cell and its cell stack

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Embodiment 1

[0028] A kind of high-efficiency full-screen flow field bipolar plate for fuel cells, such as figure 1 As shown, it consists of a single-stage plate on the anode side 100 and a single-stage plate on the cathode side 200 bonded back to back. The single-stage plate on the anode side 100 and the single-stage plate on the cathode side 200 are composed of substrates with the same outer contour. The substrate can be graphite Plate, composite graphite plate or metal plate and other conductive plates, the upper and lower sides and left and right sides of the substrate are provided with protrusions 103 protruding from the side of the substrate. In this embodiment, the middle of each side of the upper and lower sides There are two protruding parts 103 spaced apart by a certain distance, and one protruding part 103 is provided on the upper and lower ends of each side on the left and right sides. The protruding portion 103 is preferably an isosceles trapezoid, the side of the protruding p...

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Abstract

The invention relates to an efficient full-screen flow field bipolar plate for a fuel cell and a battery stack thereof. Through arrangement of the bipolar plate and the battery stack, the flow field and the sealing design can be achieved in the plane of the entire bipolar plate to reduce a traditional bipolar plate anode and cathode gas and coolant inlet and outlet frame and the seal design thereof. The outer frame seal design of the bipolar plate and a battery stack metal outer end design achieve the gas and coolant inlet and outlet functions; and the battery stack assembling employs box-typeseal assembling, and a screw beam fastening assembling design is employed to ensure the whole seal and long-term anti-vibration fastening of the battery stack. The bipolar plate and the battery stackhave high effective area rate, save the bipolar plate base material, reduce the bipolar plate processing difficulty, simplify the membrane electrode assembly outer frame preparation and have high volume ratio power of the battery stack and long-time stability and fastening of the battery stack compared to the traditional bipolar plate design.

Description

technical field [0001] The invention relates to the technical field of bipolar plate flow field and cell stack assembly design for a proton exchange membrane fuel cell, in particular to a full-screen flow field bipolar plate for a fuel cell and a cell stack thereof. Background technique [0002] At present, environmentally friendly and zero-emission new energy vehicles are developing rapidly around the world, and many developed countries in the world have formulated a timetable for the retirement of traditional gasoline vehicles. Among new energy vehicles, fuel cell electric vehicles driven by fuel cells as power sources, and fuel hydrogen instead of traditional gasoline as energy sources, are considered to be alternative new energy vehicles that are comparable in performance to traditional gasoline vehicles in all aspects. Many famous automobile manufacturers in the world have launched commercial fuel cell vehicles. [0003] The bipolar plate is one of the key components o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0258H01M8/0267H01M8/0273H01M8/241H01M8/2465
CPCY02E60/50Y02P70/50
Inventor 王树博谢晓峰陈靖
Owner TSINGHUA UNIV
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