Bionic lightweight sandwich structure of bipolar plate of fuel cell

A sandwich structure and fuel cell technology, applied to fuel cell parts, collectors/separators, etc., can solve problems such as heavy weight and violation of the lightweight concept, and achieve improved electrical conductivity, good electrical conductivity, and improved distribution effect of density

Pending Publication Date: 2022-06-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fuel cell bipolar plate bionic lightweight sandwich structure to solve the problem that the fuel cell is heavy and violates the concept of lightweight in the field of aerospace

Method used

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  • Bionic lightweight sandwich structure of bipolar plate of fuel cell
  • Bionic lightweight sandwich structure of bipolar plate of fuel cell
  • Bionic lightweight sandwich structure of bipolar plate of fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 , a bionic lightweight sandwich structure of a fuel cell bipolar plate, comprising an upper panel 1, a lower panel 2 and a special-shaped honeycomb sandwich structure 3 between the upper panel 1 and the lower panel 2; the upper panel 1 and the lower panel The length, width and height of 2 are 70mm, 70mm and 1.5mm, and the four corners are rounded with a radius of 2mm respectively. figure 2 is the top view of the sandwich structure; image 3 It is a partial enlarged schematic diagram of the sandwich structure, wherein the special-shaped honeycomb sandwich structure 3 includes a fractal thin-walled structure and a traditional honeycomb thin-walled structure stacked in sequence from top to bottom; the height of the special-shaped honeycomb sandwich structure 3 is 2 mm, Including the height of the traditional honeycomb thin-walled structure is 1mm, and the height of the fractal thin-walled structure is 1mm. The special-shaped honeycomb sandwich structure 3 ...

Embodiment 2

[0035] like Figure 5 , a bionic lightweight sandwich structure of a fuel cell bipolar plate, comprising an upper panel 1, a lower panel 2 and a special-shaped honeycomb sandwich structure 3 between the upper panel 1 and the lower panel 2; the upper panel 1 and the lower panel The length, width and height of 2 are 70mm, 70mm and 1.5mm, and the four corners are rounded with a radius of 2mm respectively. Image 6 is the top view of the sandwich structure; Figure 7 is a partially enlarged schematic diagram of the sandwich structure, in which,

[0036] The special-shaped honeycomb sandwich structure 3 includes a fractal thin-walled structure and a traditional honeycomb thin-walled structure stacked in sequence from top to bottom; the height of the special-shaped honeycomb sandwich structure 3 is 2 mm, including the traditional The thin-walled structure has a height of 1mm.

[0037] The special-shaped honeycomb sandwich structure 3 is formed by connecting several side walls, an...

Embodiment 3

[0040] like Figure 9, a bionic lightweight sandwich structure of a fuel cell bipolar plate, comprising an upper panel 1, a lower panel 2 and a special-shaped honeycomb sandwich structure 3 between the upper panel 1 and the lower panel 2; the upper panel 1 and the lower panel The length, width and height of 2 are 70mm, 70mm and 1.5mm, and the four corners are rounded with a radius of 2mm respectively. Figure 10 is the top view of the sandwich structure; Figure 11 is a partially enlarged schematic diagram of the sandwich structure, in which,

[0041] The special-shaped honeycomb sandwich structure 3 includes a fractal thin-walled structure and a traditional honeycomb thin-walled structure stacked in sequence from top to bottom; the height of the special-shaped honeycomb sandwich structure 3 is 2mm, including the traditional The thin-walled structure has a height of 1mm.

[0042] The special-shaped honeycomb sandwich structure 3 is formed by connecting several side walls, a...

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Abstract

The invention discloses a bionic lightweight sandwich structure of a bipolar plate of a fuel cell. The bionic lightweight sandwich structure comprises an upper panel, a lower panel and a special-shaped honeycomb sandwich structure positioned between the upper panel and the lower panel, the special-shaped honeycomb sandwich structure comprises a fractal thin-wall structure and a traditional honeycomb thin-wall structure which are sequentially stacked from top to bottom. The special-shaped honeycomb sandwich structure is formed by connecting a plurality of side walls, and the sandwich structure is divided into a plurality of regular hexagonal unit cells; each unit cell is provided with six side walls, two thin walls are formed on each side wall towards the two sides in a fractal mode, and the included angles between the thin walls on the two sides and the thin wall in the middle are equal after the side walls are fractured. According to the bionics principle, the structural design inspiration comes from a deep sea power generation organism'electric ray ', and the lightweight structural design of the bipolar plate conforms to the trend of the fuel cell for aerospace application; meanwhile, due to the structural characteristics of the multiple outer side faces of the special-shaped honeycomb, the special-shaped honeycomb can dispersedly bear external force from all directions.

Description

technical field [0001] The invention relates to the technical field of bionic structure engineering, in particular to a lightweight sandwich structure of a fuel cell bipolar plate. Background technique [0002] With the progress of the times and the development of science and technology, problems such as energy shortage and global warming are problems that all mankind should face together. As an advanced energy storage technology, fuel cells not only make a significant contribution to the problem of energy shortages, but also take a crucial step in mitigating global warming. In addition, the application of fuel cells in the aerospace field is currently the focus of experts. Research boom. Lightweight is an important trend of fuel cells for aerospace applications. Among them, bipolar plates are an important part of fuel cells. Bipolar plates are divided into graphite bipolar plates, metal bipolar plates and composite bipolar plates according to different material properties....

Claims

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Application Information

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IPC IPC(8): H01M8/0202H01M8/023
CPCH01M8/0202H01M8/023Y02E60/50
Inventor 林开杰顾冬冬许勇张万里陕俊豪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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