CN214152942U - Metal stamping bipolar plate of proton exchange membrane fuel cell - Google Patents
Metal stamping bipolar plate of proton exchange membrane fuel cell Download PDFInfo
- Publication number
- CN214152942U CN214152942U CN202023261181.3U CN202023261181U CN214152942U CN 214152942 U CN214152942 U CN 214152942U CN 202023261181 U CN202023261181 U CN 202023261181U CN 214152942 U CN214152942 U CN 214152942U
- Authority
- CN
- China
- Prior art keywords
- cooling water
- flow
- flow channel
- channel
- bipolar plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model relates to a proton exchange membrane fuel cell's metal punching press bipolar plate belongs to bipolar plate technical field. The bipolar plate comprises a cathode plate and an anode plate which are made of metal plates, wherein the reverse sides of the cathode plate and the anode plate are mutually matched and form a cooling water flow field flow channel by welding; the two ends of the cooling water flow field flow channel are respectively communicated with a cooling water inlet and a cooling water outlet through a cooling water distribution flow channel, and the cooling water distribution flow channel comprises parallel flow channels arranged at the upper side and the lower side and a vertical flow channel communicated with the parallel flow channels; the parallel flow channel is parallel to the cooling water flow field flow channel, and the vertical flow channel is vertically communicated with the cooling water flow field flow channel; the tail ends of the parallel flow channels are provided with sealing elements, and cooling water enters the vertical flow channels through the parallel flow channels. The utility model discloses be provided with the sealing member respectively at the end of cooling water distribution runner to change the torrent direction of cooling water, make the cooling water distribution more even.
Description
Technical Field
The utility model relates to a fuel cell technical field specifically provides a proton exchange membrane fuel cell's metal punching press bipolar plate.
Background
A proton exchange membrane hydrogen fuel cell (PEMFC) is a fuel cell, and is equivalent to a reverse device for water electrolysis in principle. The single cell consists of anode, cathode and proton exchange membrane, the anode is the place where hydrogen fuel is oxidized, the cathode is the place where oxidant is reduced, both electrodes contain catalyst for accelerating electrochemical reaction of the electrodes, and the proton exchange membrane is used as electrolyte. When working, the power supply is equivalent to a direct current power supply, the anode of the power supply is the negative pole of the power supply, and the cathode of the power supply is the positive pole of the power supply.
The reactions of the two electrodes of the hydrogen fuel cell are respectively as follows: anode (negative electrode): 2H2–4e＝4H+(ii) a Cathode (positive electrode): o is2+4e+4H+＝2H2And O. Since the proton exchange membrane can only conduct protons, hydrogen protons can pass directly through the proton exchange membrane to the cathode, while electrons can only reach the cathode through an external circuit. Direct current is generated when electrons flow through an external circuit to the cathode. When the anode is taken as a reference, the cathode potential is 1.23V. That is, the theoretical upper limit of the generated voltage of each unit cell is 1.23V. The output voltage depends on the output current density when the load is connected, and is usually between 0.5 and 1V. A fuel cell stack having an output voltage that meets the actual load requirement can be formed by stacking and combining a plurality of single cells.
The fuel cell is a device for generating electricity by directly utilizing hydrogen energy, chemical energy generated by the reaction of hydrogen and oxygen is converted into usable electric energy, and therefore, reaction gases, namely hydrogen and air, are introduced into flow fields on two sides of the bipolar plate. Because the reaction is exothermic, cooling water needs to be introduced into the bipolar plate for cooling, so that heat generated by the reaction is removed, and the stability of the overall temperature of the galvanic pile is maintained.
The bipolar plate mainly plays a role in supporting, air blocking, current collecting and electric conduction. Bipolar plates are widely used: graphite plates and metal plates. Graphite bipolar plates suffer from the following disadvantages: 1. graphite is fragile and easily damaged during assembly. 2. The graphite bipolar plate has the advantages of long cutting processing period, high precision requirement and high cost. 3. The graphitization temperature of the graphite bipolar plate is often higher than 2500 ℃, and the temperature rise procedure is very strict so as to avoid the deformation problems of shrinkage, bending and the like of the graphite bipolar plate, so that the time is long and the cost is high.
The metal bipolar plate has the advantages of excellent electric conductivity, heat conductivity, machinability, compactness, high strength, good gas barrier property and the like, can provide good power density and low-temperature (-40 ℃) start guarantee for automobile application, and is suitable for mass low-cost production. In consideration of the problem of vehicle space limitation, the metal bipolar plate is expected by domestic and foreign vehicle enterprises, especially passenger vehicle enterprises.
However, in the existing metal bipolar plate design, the flow field distribution area of the cooling water is overlapped with the gas flow field distribution area, and the stamping design and the processing are inconvenient.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model provides a proton exchange membrane fuel cell's metal punching press bipolar plate, the utility model discloses be provided with the sealing member respectively at the end of cooling water distribution runner, make cooling water flow field runner and the perpendicular intercommunication of cooling water distribution runner cut the cooling water of walking from both sides originally to change the torrent direction of cooling water, make the cooling water distribution more even, separate gas flow field runner and cooling water flow field runner simultaneously, make processing more convenient.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
the utility model provides a metal stamping bipolar plate of proton exchange membrane fuel cell, including negative plate and the anode plate made by the metal sheet, the unsmooth slot in middle part of negative plate and anode plate has constituted the runner, the runner includes the flow field runner of middle part, the distribution runner at flow field runner both ends and the import and export passageway that the distribution runner communicates, one end and the flow field runner intercommunication of distribution runner, the other end communicates hydrogen import and export passageway, air import and export passageway and cooling water import and export passageway respectively; the concave-convex groove on the front surface of the negative plate forms an air flow field channel, the concave-convex groove on the front surface of the positive plate forms a hydrogen flow field channel, and the negative plate are mutually matched and welded to form a cooling water flow field channel; the two ends of the cooling water flow field flow channel are respectively communicated with a cooling water inlet and a cooling water outlet through a cooling water distribution flow channel, and the cooling water distribution flow channel comprises parallel flow channels arranged at the upper side and the lower side and a vertical flow channel communicated with the parallel flow channels; the parallel flow channel is parallel to the cooling water flow field flow channel, and the vertical flow channel is vertically communicated with the cooling water flow field flow channel; and the tail ends of the parallel flow channels are provided with sealing elements, and cooling water enters the vertical flow channels through the parallel flow channels.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses well flow field layout of cooling water is more reasonable: the cooling water is firstly taken from two sides and is cut off through the sealing piece, so that the turbulence direction of the cooling water main body is changed, and meanwhile, the width and the shape of a flow passage at the position can be changed according to different flow rates, so that the cooling water is distributed more uniformly. The water inlet structure is simple as a whole and convenient to process;
the utility model discloses a flow field separately designs, mutually noninterfere: the middle parts of the gas distribution flow channels of the air flow field flow channel and the hydrogen flow field flow channel are jointed together, and cooling water does not flow through the area, so that the design of the air flow field and the hydrogen flow field gas distribution flow channel does not need to consider the influence of a water flow field too much, the design of the gas distribution area is more convenient, the joint of the middle parts can also ensure that the structure strength of the bipolar plate is higher, and the processing is simpler;
the utility model discloses better structural advantage has: compared with the cooling water on the market which passes through the middle part of the distribution area of the airflow, the design has higher structural strength, simple processing and lower cost; compared with the design that the opening of cooling water is arranged on the side surface in the market, the design can reduce the width of the galvanic pile, and has lighter weight and higher volume density; meanwhile, compared with the graphite bipolar plate, the cost is lower.
Drawings
FIG. 1 is an exploded view of a metal bipolar plate of a PEM fuel cell according to the present invention;
FIG. 2 is a schematic diagram of a metal bipolar plate of a PEMFC according to the present invention after welding;
FIG. 3 is a schematic diagram of the distribution of cooling water on the bipolar plate in the PEM fuel cell of the present invention;
FIG. 4 is a schematic diagram of the front structure of the cathode plate of the proton exchange membrane fuel cell of the present invention;
fig. 5 is a schematic front structural view of the anode plate of the proton exchange membrane fuel cell of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-5, the utility model provides a metal stamping bipolar plate of proton exchange membrane fuel cell, including negative plate 1 and anode plate 2 made by the metal sheet, the concave-convex groove in the middle part of negative plate 1 and anode plate 2 has constituted the runner, the runner includes the inlet and outlet channel that the flow field runner 3 of mid portion, the distribution runner 4 and the distribution runner 4 at the flow field runner 3 both ends communicate, one end of distribution runner 4 communicates with flow field runner 3, the other end communicates hydrogen inlet and outlet channel 5, air inlet and outlet channel 6 and cooling water inlet and outlet channel 7 respectively; an air flow field channel 3-1 is formed by a concave-convex groove on the front side of the negative plate 1, a hydrogen flow field channel 3-2 is formed by a concave-convex groove on the front side of the positive plate 2, and a cooling water flow field channel 3-3 is formed by mutually matching the negative plate 1 and the negative plate 2 and welding; two ends of the cooling water flow field flow channel 3-3 are respectively communicated with a cooling water inlet 7-1 and a cooling water outlet 7-2 through a cooling water distribution flow channel 4-3, and the cooling water distribution flow channel 4-3 comprises parallel flow channels 8 arranged at the upper side and the lower side and a vertical flow channel 9 communicated with the parallel flow channels 8; the parallel flow channel 8 is parallel to the cooling water flow field flow channel 3-3, and the vertical flow channel 9 is vertically communicated with the cooling water flow field flow channel 3-3; the end of the parallel flow passage 8 is provided with a sealing member 10, and the cooling water enters the vertical flow passage 9 through the parallel flow passage 8.
The utility model discloses a terminal at cooling water distribution runner is provided with the sealing member for cooling water flow field runner communicates with the cooling water distribution runner is perpendicular, thereby makes original cooling horizontal flow change the torrent into, makes more even of cooling water distribution.
Furthermore, two ends of the air flow field channel 3-1 are respectively communicated with the air inlet 11-1 and the air outlet 11-2 through the air distribution channel 4-1. Two ends of the hydrogen flow field flow passage 3-2 are respectively communicated with the hydrogen inlet 12-1 and the hydrogen outlet 12-2 through the hydrogen distribution flow passage 4-2. The hydrogen inlet 12-1 and the hydrogen outlet 12-2 are respectively arranged at the diagonal positions of the bipolar plate; the air inlet 11-1 and the air outlet 11-2 are positioned at the other pair of diagonal positions of the bipolar plate, the cooling water inlet and the cooling water outlet are positioned at the middle positions of the two ends of the bipolar plate, the cooling water inlet 7-1, the air outlet 11-2 and the hydrogen outlet 12-2 are positioned at the same end of the bipolar plate, and the cooling water outlet 7-2, the air inlet 11-1 and the hydrogen inlet 12-1 are positioned at the other end of the bipolar plate. It can be seen from the figure that the middle parts of the distribution flow channels of the air flow field flow channel and the hydrogen flow field flow channel are jointed together, cooling water does not flow through the area, and the distribution flow channels of the air flow field flow channel and the hydrogen flow field flow channel can be designed without considering the influence of the water flow field too much, so that the gas distribution flow channel is more convenient to design, the joint of the middle parts can also enable the structure strength of the bipolar plate to be higher, and the processing to be simpler.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A metal stamping bipolar plate of a proton exchange membrane fuel cell comprises a cathode plate and an anode plate which are made of metal plates, wherein concave-convex grooves in the middle of the cathode plate and the anode plate form a flow channel, the flow channel comprises a flow field flow channel in the middle, distribution flow channels at two ends of the flow field flow channel and inlet and outlet channels communicated with the distribution flow channels, one end of the distribution flow channel is communicated with the flow field flow channel, and the other end of the distribution flow channel is respectively communicated with a hydrogen inlet and outlet channel, an air inlet and outlet channel and a cooling water inlet and outlet channel; the hydrogen cooling water flow field is characterized in that an air flow field channel is formed by concave-convex grooves on the front surface of the negative plate, a hydrogen flow field channel is formed by concave-convex grooves on the front surface of the positive plate, and a cooling water flow field channel is formed by mutually matching and welding the back surfaces of the negative plate and the positive plate; the two ends of the cooling water flow field flow channel are respectively communicated with a cooling water inlet and a cooling water outlet through a cooling water distribution flow channel, and the cooling water distribution flow channel comprises parallel flow channels arranged at the upper side and the lower side and a vertical flow channel communicated with the parallel flow channels; the parallel flow channel is parallel to the cooling water flow field flow channel, and the vertical flow channel is vertically communicated with the cooling water flow field flow channel; and the tail ends of the parallel flow channels are provided with sealing elements, and cooling water enters the vertical flow channels through the parallel flow channels.
2. The metal stamped bipolar plate of a pem fuel cell of claim 1 wherein said air flow field channels are connected at both ends to an air inlet and an air outlet by air distribution channels, respectively.
3. The metal stamped bipolar plate of a pem fuel cell according to claim 2 wherein the two ends of the flow channels of the hydrogen flow field are respectively connected to the hydrogen inlet and the hydrogen outlet through hydrogen distribution flow channels.
4. The metal stamped bipolar plate of a pem fuel cell of claim 3 wherein said hydrogen inlet and hydrogen outlet are respectively disposed at opposite corners of the bipolar plate; the air inlet and air outlet are located at another pair of diagonal positions of the bipolar plate.
5. The stamped metal bipolar plate of a pem fuel cell of claim 4 wherein said cooling water inlet and outlet are located at the middle of the two ends of the bipolar plate, and the cooling water inlet and air outlet and hydrogen outlet are located at the same end of the bipolar plate, and the cooling water outlet and air inlet and hydrogen inlet are located at the other end of the bipolar plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261181.3U CN214152942U (en) | 2020-12-30 | 2020-12-30 | Metal stamping bipolar plate of proton exchange membrane fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023261181.3U CN214152942U (en) | 2020-12-30 | 2020-12-30 | Metal stamping bipolar plate of proton exchange membrane fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214152942U true CN214152942U (en) | 2021-09-07 |
Family
ID=77543999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023261181.3U Active CN214152942U (en) | 2020-12-30 | 2020-12-30 | Metal stamping bipolar plate of proton exchange membrane fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214152942U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657583A (en) * | 2022-04-11 | 2022-06-24 | 佛山仙湖实验室 | Bipolar plate and water electrolytic tank |
| CN117488325A (en) * | 2023-09-18 | 2024-02-02 | 绿氢动力科技(深圳)有限公司 | Proton membrane water electrolysis hydrogen production device with cooling water channel |
-
2020
- 2020-12-30 CN CN202023261181.3U patent/CN214152942U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657583A (en) * | 2022-04-11 | 2022-06-24 | 佛山仙湖实验室 | Bipolar plate and water electrolytic tank |
| CN114657583B (en) * | 2022-04-11 | 2023-12-05 | 佛山仙湖实验室 | Bipolar plate and water electrolysis tank |
| CN117488325A (en) * | 2023-09-18 | 2024-02-02 | 绿氢动力科技(深圳)有限公司 | Proton membrane water electrolysis hydrogen production device with cooling water channel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108172857B (en) | Fuel cell stack flow field plate supporting high-current-density discharge | |
| CN110380077A (en) | A kind of combined type runner fuel battery double plates | |
| CN214152942U (en) | Metal stamping bipolar plate of proton exchange membrane fuel cell | |
| CN111477906A (en) | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack | |
| CN111477907A (en) | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack | |
| CN115064722B (en) | Heat dissipation metal stamping bipolar plate of air-cooled proton exchange membrane fuel cell | |
| CN111509256A (en) | Flow field of fork-shaped leaf vein-shaped interdigitated proton exchange membrane fuel cell bipolar plate | |
| CN111048801A (en) | Air-cooled hydrogen fuel cell based on single metal polar plate and electric pile | |
| CN100550500C (en) | A kind of fuel battery | |
| CN210866380U (en) | Proton exchange membrane fuel cell monomer and proton exchange membrane fuel cell stack | |
| CN111864241A (en) | Small proton exchange film fuel cell | |
| CN210576257U (en) | Air cooling fuel cell with elasticity and thermal-insulated end plate mechanism | |
| CN209344232U (en) | Closed air-cooled fuel cell | |
| CN216528962U (en) | Battery polar plate and bipolar plate | |
| CN109904481A (en) | The cathode of solid oxide fuel cell metal foam runner optimizes structure | |
| CN212695190U (en) | Fuel cell unipolar plate and fuel cell stack thereof | |
| CN212085140U (en) | Novel metal bipolar plate of hydrogen fuel cell | |
| CN211829033U (en) | Improved solid oxide fuel cell device | |
| CN210015916U (en) | Metal bipolar plate of proton exchange membrane fuel cell | |
| CN112968189A (en) | Air cooling type fuel cell anode plate | |
| CN111477909A (en) | Air-permeable bipolar plate suitable for fuel cell stack and fuel cell stack | |
| CN218069922U (en) | Hydrogen-oxygen fuel cell, temperature control system and mobile power supply | |
| CN215266396U (en) | Large-capacity direct methanol fuel cell stack | |
| CN111326763A (en) | Metal bipolar plate of honeycomb-like flow field | |
| CN212517258U (en) | Air-cooled fuel cell unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |