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A cathode plate with protrusions and depressions, a bipolar plate, and a fuel cell

A cathode plate and metal plate technology, applied in the direction of fuel cells, fuel cell components, circuits, etc., can solve problems that no researchers have studied

Active Publication Date: 2020-11-27
擎能动力科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the shapes of half-drop-shaped protrusions and half-drop-shaped depressions also have an impact in essence, and these effects have not yet been studied by researchers.
[0006] At the same time, no researchers have studied how to achieve half-drop-shaped protrusions and half-drop-shaped depressions on the cathode plate.

Method used

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  • A cathode plate with protrusions and depressions, a bipolar plate, and a fuel cell
  • A cathode plate with protrusions and depressions, a bipolar plate, and a fuel cell
  • A cathode plate with protrusions and depressions, a bipolar plate, and a fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, a semi-droplet-shaped projection of a fuel cell flow field structure, the three-dimensional shape of the semi-droplet-shaped projection includes: a tail and a head, the tail 3-1 and the head 3-2 The intersection surface 3-3 is a semicircular surface;

[0060] The tail is a semi-ellipsoid (semi-ellipsoid), and along the direction of the tail to the head, its cross-sectional area gradually increases until the intersection surface 3-3 (the surface perpendicular to the cathode plate) reaches the maximum; along the tail In the direction of the head, the cross-sectional area of ​​the head 3-2 gradually decreases.

[0061]The direction that the tail points to the head is the X direction, the direction perpendicular to the X direction and on the cathode plate surface is the Y direction, and the direction perpendicular to the cathode plate surface is the Z direction, and the X direction, Y direction, and Z direction form a three-dimensional right angle coordinate ...

Embodiment 2

[0081] Embodiment 2: The subject of Embodiment 2 is to study: how to arrange protrusions and depressions.

[0082] From attached figure 1 It can be seen that the design of the half-water droplet convex array on the cathode plate (half-water droplet concave array on the cathode plate) is also related to its arrangement design in addition to the shape of a single protrusion (depression).

[0083] In order to meet the maximization of protrusion and depression, such as Figure 9 As shown, the shape of the protrusion and the depression is the same, no matter what its shape is, the distance Sx=L of the protrusion (depression) along the X direction;

[0084] The length from the first vertex to the second vertex is L.

[0085] As for Sy, Sy≤2×r2, but its exact solution is difficult to be expressed by formula.

[0086] Based on the analysis of the first embodiment, it can be seen that when r1=r2, the tail is a hemisphere, and the corresponding effect is the best. In particular, the...

Embodiment 3

[0088] Cathode plate semi-water drop projection (cathode plate half water drop concave array) is applied to the cathode plate in the fuel cell bipolar plate;

[0089] Such as figure 1 As shown, the cathode plate 1 (using a rectangular metal plate) is provided with an air inlet 8 and an air outlet 9, and the air inlet 8 and the air outlet 9 are arranged at the corners of the cathode plate 1, and the air inlet 8 and the air outlet 9 are Diagonal arrangement; a flow field structure is arranged in the middle of the cathode plate 1;

[0090] The flow field structure includes: a half-droplet-shaped projection array on the cathode plate, and a half-droplet-shaped concave array on the cathode plate;

[0091] The cathode plate half-drop-shaped projection array includes: several cathode plate half-drop-shaped projections, and the cathode plate half-drop-shaped projections are arranged in a quincunx shape;

[0092] The array of semi-drop-shaped recesses on the cathode plate includes: s...

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Abstract

The invention discloses a cathode plate with bulges and recesses, a bipolar plate and a fuel cell. The invention belongs to the technical field of new energy automobile fuel cells. According to the technical scheme, the cathode plate provided with the bulges and the recesses is a rectangular metal plate, and comprises at least one air inlet and at least one air outlet, the air inlets and the air outlets are formed in the two sides of the cathode plate, and a flow field structure formed by the bulges and recesses is formed in the middle of the cathode plate. The bulges are identical semi-drop-shaped budges and the recesses are identical semi-drop-shaped recesses. In the X direction, the identical and the recesses are alternately arranged; the shapes of the semi-water-drop-shaped recesses are the same as those of the semi-water-drop-shaped identical, and the orientation directions of the semi-water-drop-shaped identical and the semi-water-drop-shaped recesses are opposite, that is, the direction from the tail portions of the semi-water-drop-shaped recesses to the head portions of the semi-water-drop-shaped recesses is the X reverse direction.

Description

technical field [0001] The invention relates to the technical field of fuel cells for new energy vehicles, in particular to a cathode plate with protrusions and depressions, a bipolar plate and a fuel cell. Background technique [0002] The flow channel of the cathode plate of the fuel cell is relatively narrow. After the air enters the flow field after humidification, the water vapor in it is easy to condense on the wall of the flow field, which will cause the flow field to be blocked and reduce the performance of the fuel cell. [0003] Different from the previous solutions, such as: installing waterproof coating on the wall of the flow channel, setting raised points in the flow channel of the fuel cell, changing the shape of the serpentine flow channel, etc., the applicant stated in the patent literature: "Fuel cell flow field Structure, cathode plate, fuel cell bipolar plate, fuel cell” proposes a flow field structure composed of semi-droplet-shaped protrusions and semi-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0258H01M8/026
CPCH01M8/0258H01M8/026Y02E60/50
Inventor 尹丛勃宋和国陈雷裴满许仁涛任军华何明宇黄德永
Owner 擎能动力科技(苏州)有限公司
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