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Bipolar plate structure capable of being used for fuel cell, fuel cell and fuel cell vehicle

A fuel cell and bipolar plate technology, which is applied in fuel cells, power system fuel cells, circuits, etc., can solve the problems of increasing the overall weight of the battery stack, reducing power density, and insufficient, and improving the reaction uniformity and the stack. Power density, effect of increasing flow rate and activity, reducing process cost

Active Publication Date: 2021-01-19
FTXT ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) In the proton exchange membrane fuel cell stack, the stamping channel of the bipolar plate flow field needs to be developed according to the size of the channel. If the shapes of the fuel channel, air channel and coolant channel are different, then the Multiple sets of molds need to be developed, and the cost of mold development is extremely high, thus greatly increasing the cost of fuel cells;
[0007] 2) The metal bipolar plate stamping process is affected by the physical properties of the metal itself and the process technology. The bipolar plate needs to ensure that the substrate thickness is about 0.3mm, which increases the weight of the bipolar plate and the overall weight of the battery stack, reducing power density;
[0008] 3) It is difficult to overcome the insufficient reaction in the flow channel of the bipolar plate flow field, such as low current density and difficulty in eliminating the generated water;
[0009] 4) The utilization rate of the reaction area of ​​the bipolar plate flow field flow channel is low, and the area of ​​the support surface is too large, which limits the reaction efficiency of the fuel cell

Method used

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  • Bipolar plate structure capable of being used for fuel cell, fuel cell and fuel cell vehicle
  • Bipolar plate structure capable of being used for fuel cell, fuel cell and fuel cell vehicle
  • Bipolar plate structure capable of being used for fuel cell, fuel cell and fuel cell vehicle

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no. 1 example

[0046] figure 1 A bipolar plate structure 10 applicable to a fuel cell according to an embodiment of the present disclosure is shown. Such as figure 1 As shown, the bipolar plate structure 10 includes a substrate 11 ( figure 1 The middle part shows the substrate 11) and the mesh structure 13. There are multiple flow regions for fluids on the substrate 11 , including but not limited to an inlet region 111 , a transition region 112 and a reaction region 113 . Mesh structure 13 has a mesh, the size of the length direction of the mesh is greater than the size of the width direction (described in detail below), the mesh structure 13 is arranged on the base, forming at least one of the plurality of flow areas , for example forming the inlet zone 111 , the transition zone 112 and the reaction zone 113 . Described in detail below.

[0047] figure 2 The structure of the substrate 11 is shown. The base 11 is, for example, a metal substrate. Metal substrates have obvious advanta...

no. 2 example

[0060] The second embodiment of the present disclosure relates to a method 200 for preparing a bipolar plate structure that can be used in fuel cells, the following reference Figure 7 describe.

[0061] Such as Figure 7 As shown, method 200 includes:

[0062] In step S201, a substrate is provided or prepared. The substrate, such as the substrate 11 described above in the first embodiment section, has a plurality of flow regions for fluids thereon, including but not limited to inlet regions, transition regions and reaction regions.

[0063] In step S202, a network structure is provided or prepared. The mesh structure is, for example, the mesh structure 13 described in the first embodiment above, which has mesh holes, and the size of the mesh holes in the length direction is larger than the size in the width direction.

[0064] In step S203, the mesh structure is disposed on the substrate to form at least one of the plurality of flow regions, thereby forming a bipolar plat...

no. 3 example

[0071] The third embodiment of the present disclosure also relates to a bipolar plate structure applicable to a fuel cell. The third embodiment is a modification of the first embodiment, so for the sake of clarity, the same components in the third embodiment and the first embodiment are denoted by the same reference numerals, for example, the bipolar plate structure is still denoted by 10 , the base is still represented by 11.

[0072]The bipolar plate structure 10 of the third embodiment of the present disclosure includes a base 11 and a network structure 13', and the base 11 has a plurality of flow areas for fluids, such as including but not limited to an inlet area, a transition area, and a reaction area. . The base is the same as the base 11 of the first embodiment, and will not be repeated here. Emphatically describe the network structure 13' below.

[0073] Figure 8 A microscopic view of the length direction of the network structure 13' is shown; Figure 9 A micros...

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Abstract

The present disclosure relates to a bipolar plate structure usable for a fuel cell, comprising: a substrate having a plurality of flow regions for a fluid thereon; a mesh structure having mesh holes,wherein the mesh structure is provided on the substrate and forms at least one of the plurality of flow regions, and protrusions are provided at connection portions of the mesh holes to increase flowresistance transverse to a direction of the protrusions.

Description

technical field [0001] The present disclosure relates to the technical field of fuel cells, and in particular to a bipolar plate structure applicable to fuel cells, a fuel cell including the bipolar plate structure, and a fuel cell vehicle. Background technique [0002] The fuel cell uses hydrogen as fuel, does not need to go through the combustion process, and directly converts the chemical energy in the fuel and oxidant into electrical energy in the form of electrochemical reaction, without going through the heat engine process, so it is not limited by the Carnot cycle. The actual energy The conversion efficiency is as high as 50% to 80%, so it is a high-efficiency energy conversion power generation device. Proton exchange membrane fuel cells are the fifth generation of fuel cells, developed after alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells and solid oxide fuel cells, which have several advantages, including operating temperature Low, shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0254
CPCH01M8/0254H01M2250/20Y02E60/50
Inventor 刘栋栋王鹏龚正伟靳少辉韩亚民翟海朋
Owner FTXT ENERGY TECH CO LTD
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