Sealing structure for enhancing stability of fuel cell stack

A fuel cell stack and sealing structure technology, which is applied to fuel cell parts, fuel cells, sealing/supporting devices, etc., can solve the problem of unsuitability for mass production, complex sealing methods, and inability to improve the stability of stack assembly In order to achieve the effect of stable and reliable sealing structure, strong durability, and not easy to deform

Active Publication Date: 2018-09-28
SHANGHAI ZHIZHEN NEW ENERGY EQUIP CO LTD
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the above analysis, the existing fuel cell plate sealing structure cannot improve the stability of stack assembly, and the sealing method is relatively complicated, which is not suitable for mass production.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sealing structure for enhancing stability of fuel cell stack
  • Sealing structure for enhancing stability of fuel cell stack
  • Sealing structure for enhancing stability of fuel cell stack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] see figure 1 Each bipolar plate 2 is formed by stacking the cathode plate and the anode plate of the fuel cell, and the cathode plate is on the anode plate. Both sides of the bipolar plate 2 are provided with positioning holes.

[0020] The process of forming the plastic-coated structure 3 and the sealing structure 4 on the bipolar plate 2 is as follows: put the bipolar plate 2 into the injection mold, and the positioning holes on the bipolar plate 2 cooperate with the positioning pins on the injection mold to realize alignment of the bipolar plate 2. The positioning of the pole plate 2, the sealing cavity of the injection mold covers the edge of the bipolar plate 2, injects the hot melt material into the injection mold until it fills the mold cavity, then cools and solidifies, takes out the mold, and the injection molding material is placed on the bipolar plate 2 The overmolding structure 3 and the sealing structure 4 are formed by the last injection molding, and the ...

Embodiment 2

[0024] see figure 2 Each bipolar plate 2 is formed by stacking the cathode plate and the anode plate of the fuel cell, and the cathode plate is on the anode plate. Both sides of the bipolar plate 2 are provided with positioning holes, and the bipolar plate 2 is also provided with a communication hole 7 passing through the cathode side and the anode side.

[0025] The process of forming the plastic-coated structure 3 and the sealing structure 4 on the bipolar plate 2 is as follows: put the bipolar plate 2 into the injection mold, and the positioning holes on the bipolar plate 2 cooperate with the positioning pins on the injection mold to realize alignment of the bipolar plate 2. The positioning of the pole plate 2, the sealing cavity of the injection mold covers the edge of the bipolar plate 2, injects the hot melt material into the injection mold until it fills the mold cavity, then cools and solidifies, takes out the mold, and the injection molding material is placed on the ...

Embodiment 3

[0029] see image 3 Each bipolar plate 2 is formed by stacking the cathode plate and the anode plate of the fuel cell, and the cathode plate is on the anode plate. Both sides of the bipolar plate 2 are provided with positioning holes.

[0030]The process of forming the plastic-coated structure 3 and the sealing structure 4 on the bipolar plate 2 is as follows: put the bipolar plate 2 into the injection mold, and the positioning holes on the bipolar plate 2 cooperate with the positioning pins on the injection mold to realize alignment of the bipolar plate 2. The positioning of the polar plate 2, the sealed cavity of the injection mold covers the edge of the bipolar plate 2, injects the hot melt material into the injection mold until it fills the cavity, then cools and solidifies, takes out the mold, and injection molds the overmolded structure 3 The edge of the bipolar plate 2 is overmolded with the material to form the overmolded structure 3 . In the above two embodiments, t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a sealing structure for enhancing the stability of a fuel cell stack, comprising a bipolar plate and a membrane electrode assembly, which are alternately stacked, wherein the edge of the bipolar plate is injection molded with a plastic-covered structure; the two side surfaces of the bipolar plate are each injection molded with a sealing structure; and the sealing structureis bonded to a frame of the membrane electrode assembly on the side where the sealing structure is by compression so as to achieve a sealing effect. The plastic-covered structure plays the role of positioning and limiting in the assembly process of the electric stack, which improves the assembly robustness, prevents the polar plate from overvoltage, also functions to connect the bipolar plate andreduces the deformation caused in the connection process. The injection molded sealing structure has good stability and does not cause problems such as slippage failure and the like. The use of a multichannel raised sealing design improves the sealing reliability. The sealing structure for enhancing the stability of the fuel cell stack in the invention can improve the service life of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a sealing structure for enhancing the stability of fuel cell stacks. Background technique [0002] A fuel cell is an energy device that directly converts chemical energy into electrical energy. It is mainly composed of bipolar plates, membrane electrodes and other components through stacked assembly. The bipolar plate mainly plays the role of distributing the reaction gas, collecting electrons, supporting the membrane electrode, and discharging the water generated by the reaction. It is one of the key components in the fuel cell. [0003] In order to prevent gas leakage in fuel cells, especially the cross-channeling of cathode and anode reaction gases, sealing elements must be designed on the surface of bipolar plates. The existing technology is to prefabricate a sealing ring or a sealing gasket, and then fix it on both sides of the bipolar plate with glue to form a sealing c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M8/0276H01M8/0284H01M8/0286
CPCH01M8/0276H01M8/0284H01M8/0286Y02E60/50
Inventor 徐一凡姜天豪毕飞飞蓝树槐
Owner SHANGHAI ZHIZHEN NEW ENERGY EQUIP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap