CN212967767U - Hot-press formed graphite bipolar plate for hydrogen fuel cell - Google Patents
Hot-press formed graphite bipolar plate for hydrogen fuel cell Download PDFInfo
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- CN212967767U CN212967767U CN202021942582.2U CN202021942582U CN212967767U CN 212967767 U CN212967767 U CN 212967767U CN 202021942582 U CN202021942582 U CN 202021942582U CN 212967767 U CN212967767 U CN 212967767U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model discloses a hot-press molding hydrogen fuel cell graphite bipolar plate, which comprises a bipolar plate body, wherein the bipolar plate body is provided with a hydrogen inlet, a hydrogen outlet, a water inlet, a water outlet and a water channel area; the water channel area is provided with a plurality of water channel ridges, a water channel is formed between every two adjacent water channel ridges and comprises a straight-through channel I, a snake-shaped channel and a straight-through channel II, the straight-through channel I and the straight-through channel II are arranged in parallel, and the water inlet, the straight-through channel I, the snake-shaped channel, the straight-through channel II and the water outlet are sequentially communicated at one time. The utility model discloses simple structure, it is nimble convenient to use, and the commonality is good, and the electric conductivity is strong. The design that the straight-through flow channel is combined with the serpentine flow channel is adopted, so that the phenomenon of uneven flow velocity of the fluid at the rear section caused by the straight-through flow channel is avoided, and the phenomenon of overlarge pressure drop caused by overlong serpentine flow channel is also avoided.
Description
Technical Field
The utility model relates to a fuel cell spare part technical field especially relates to a hot briquetting hydrogen fuel cell graphite bipolar plate.
Background
The hydrogen fuel cell is a power generation device which directly converts chemical energy of hydrogen and oxygen into electric energy, has the advantages of no pollution to the environment, quiet running, high energy conversion efficiency and the like, and is favored in the aerospace and automobile industries.
The bipolar plate (also called separator) has the functions of providing a gas flow channel, preventing the hydrogen and oxygen in the cell gas chamber from communicating with each other, and establishing a current path between the anode and the cathode which are connected in series. The thickness of the bipolar plate should be as thin as possible while maintaining a certain mechanical strength and good gas barrier effect to reduce the conductive resistance to current and heat.
The existing bipolar plate flow channels have problems: the pressure drop of the straight-through flow field is small, but the fuel flow is easily distributed unevenly, so that the fuel utilization rate is low; too long serpentine flow channels result in poor drainage.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned defects, the present invention aims to provide a thermal compression molding hydrogen fuel cell graphite bipolar plate which has high stability, high work efficiency and simultaneously takes into account the reaction gas utilization rate and the water discharge capacity.
In order to achieve the above object, the utility model discloses a following technical scheme realizes: a hot-press formed graphite bipolar plate for a hydrogen fuel cell comprises a bipolar plate body, wherein a hydrogen inlet, a hydrogen outlet, a water inlet, a water outlet and a water channel area are formed in the bipolar plate body; the shape of the hydrogen inlet is the same as that of the hydrogen outlet, and the two mirror image parts are arranged on the hydrogen inlet; the water channel area is provided with a plurality of water channel ridges, a water channel is formed between every two adjacent water channel ridges and comprises a straight-through channel I, a serpentine channel and a straight-through channel II, the straight-through channel I and the straight-through channel II are arranged in parallel, the inlet end of the straight-through channel I is communicated with a water inlet, the outlet end of the straight-through channel I is communicated with the inlet end of the serpentine channel, the outlet end of the serpentine channel is communicated with the inlet end of the straight-through channel II, and the outlet end of the straight-through channel II is communicated with a water outlet.
Furthermore, the straight-through type flow channel I and the straight-through type flow channel II are provided with a plurality of straight-through type flow channel units which are arranged side by side.
Furthermore, the number of the straight-through flow channel units of the straight-through flow channel I is the same as that of the straight-through flow channel units of the straight-through flow channel II.
Furthermore, the snake-shaped flow channel is provided with a plurality of snake-shaped flow channel units which are arranged side by side.
Furthermore, the number of the arc-shaped inflection points of the serpentine flow channel unit is 5-10.
The utility model has the advantages that: simple structure, flexible and convenient use, good universality and strong conductive capability. The design that the straight-through flow channel is combined with the serpentine flow channel is adopted, so that the phenomenon of uneven flow velocity of the fluid at the rear section caused by the straight-through flow channel is avoided, and the phenomenon of overlarge pressure drop caused by overlong serpentine flow channel is also avoided. Therefore, the utility model has the advantages that the flow field of the hot-press molding hydrogen cell graphite bipolar plate is uniform and stable, and the heat dissipation is smooth; the mechanical property and the conductivity of the traditional bipolar plate material are improved.
Drawings
Fig. 1 is a schematic structural diagram of the graphite bipolar plate for a pressure-formed hydrogen fuel cell of the present invention.
Wherein: 1. the bipolar plate comprises a bipolar plate body, 2, a hydrogen inlet, 3, a hydrogen outlet, 4, a water inlet, 5, a water outlet, 6, a water channel area, 7, straight-through type flow channels I and 8, a snake-shaped flow channel, 9 and a straight-through type flow channel II.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
As shown in fig. 1, a hot-press formed graphite bipolar plate for a hydrogen fuel cell comprises a bipolar plate body 1, wherein the bipolar plate body 1 is provided with a hydrogen inlet 2, a hydrogen outlet 3, a water inlet 4, a water outlet 5 and a water channel area 6. The hydrogen inlet 2 has the same shape as the hydrogen outlet 3 and is a mirror image of the two, and the water inlet 4 has the same shape as the water outlet 5 and is a mirror image of the two.
The water channel area 6 is provided with a plurality of water channel ridges, a water channel is formed between every two adjacent water channel ridges and comprises a straight-through channel I7, a snake-shaped channel 8 and a straight-through channel II 9, and the straight-through channel I7 and the straight-through channel II 9 are arranged in parallel. The utility model discloses an adopt the design that through type runner and snakelike runner combine, avoided the inhomogeneous phenomenon of back end fluid flow velocity that through type runner leads to, also avoided the too big phenomenon of pressure drop that snakelike runner overlength produced simultaneously.
The inlet end of the straight-through flow channel I7 is communicated with the water inlet 4, the outlet end of the straight-through flow channel I7 is communicated with the inlet end of the snake-shaped flow channel 8, the outlet end of the snake-shaped flow channel 8 is communicated with the inlet end of the straight-through flow channel II 9, and the outlet end of the straight-through flow channel II 9 is communicated with the water outlet 5. The straight-through type flow channel I7 and the straight-through type flow channel II 9 are provided with a plurality of straight-through type flow channel units which are arranged side by side. The number of the straight-through flow channel units of the straight-through flow channel I7 is the same as that of the straight-through flow channel II 9. The serpentine flow passage 8 is provided with a plurality of serpentine flow passage 8 units arranged side by side. The number of the arc-shaped inflection points of the serpentine flow channel 8 unit is 5-10.
This novel simple structure, it is nimble convenient to use, and the commonality is good, and the conducting capacity is strong. The design that the straight-through flow channel is combined with the serpentine flow channel is adopted, so that the phenomenon of uneven flow velocity of the fluid at the rear section caused by the straight-through flow channel is avoided, and the phenomenon of overlarge pressure drop caused by overlong serpentine flow channel is also avoided. Therefore, the utility model has the advantages that the flow field of the hot-press molding hydrogen cell graphite bipolar plate is uniform and stable, and the heat dissipation is smooth; the mechanical property and the conductivity of the traditional bipolar plate material are improved.
Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and description have been made only for the purpose of illustrating the principles of the invention. The present invention can be further modified and improved without departing from the spirit and scope of the present invention. Such changes and modifications are intended to be within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The hot-press forming hydrogen fuel cell graphite bipolar plate is characterized in that: the bipolar plate comprises a bipolar plate body, wherein a hydrogen inlet, a hydrogen outlet, a water inlet, a water outlet and a water channel area are formed in the bipolar plate body; the shape of the hydrogen inlet is the same as that of the hydrogen outlet, and the two mirror image parts are arranged on the hydrogen inlet; the water channel area is provided with a plurality of water channel ridges, a water channel is formed between every two adjacent water channel ridges and comprises a straight-through channel I, a serpentine channel and a straight-through channel II, the straight-through channel I and the straight-through channel II are arranged in parallel, the inlet end of the straight-through channel I is communicated with a water inlet, the outlet end of the straight-through channel I is communicated with the inlet end of the serpentine channel, the outlet end of the serpentine channel is communicated with the inlet end of the straight-through channel II, and the outlet end of the straight-through channel II is communicated with a water outlet.
2. The graphite bipolar plate for a hydrogen fuel cell according to claim 1, wherein: the straight-through type flow channel I and the straight-through type flow channel II are provided with a plurality of straight-through type flow channel units which are arranged side by side.
3. The hot-press formed hydrogen fuel cell graphite bipolar plate of claim 2, wherein: the number of the straight-through flow channel units of the straight-through flow channel I is the same as that of the straight-through flow channel units of the straight-through flow channel II.
4. The graphite bipolar plate for a hydrogen fuel cell according to claim 1, wherein: the snakelike runner is provided with a plurality of snakelike runner units which are arranged side by side.
5. The hot-press formed hydrogen fuel cell graphite bipolar plate of claim 4, wherein: the number of the arc-shaped inflection points of the snake-shaped flow passage unit is 5-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021942582.2U CN212967767U (en) | 2020-09-08 | 2020-09-08 | Hot-press formed graphite bipolar plate for hydrogen fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021942582.2U CN212967767U (en) | 2020-09-08 | 2020-09-08 | Hot-press formed graphite bipolar plate for hydrogen fuel cell |
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| CN212967767U true CN212967767U (en) | 2021-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759208A (en) * | 2022-05-09 | 2022-07-15 | 中国第一汽车股份有限公司 | Fuel cell bipolar plate and fuel cell with same |
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2020
- 2020-09-08 CN CN202021942582.2U patent/CN212967767U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759208A (en) * | 2022-05-09 | 2022-07-15 | 中国第一汽车股份有限公司 | Fuel cell bipolar plate and fuel cell with same |
| CN114759208B (en) * | 2022-05-09 | 2024-03-19 | 中国第一汽车股份有限公司 | Fuel cell bipolar plate and fuel cell with same |
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