CN216850002U - Metal bipolar plate of fuel cell - Google Patents
Metal bipolar plate of fuel cell Download PDFInfo
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- CN216850002U CN216850002U CN202221146185.3U CN202221146185U CN216850002U CN 216850002 U CN216850002 U CN 216850002U CN 202221146185 U CN202221146185 U CN 202221146185U CN 216850002 U CN216850002 U CN 216850002U
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Abstract
The utility model discloses a fuel cell metal bipolar plate, include: an anode plate, a cathode plate and a cooling liquid flow channel formed between the anode plate and the cathode plate; the front and back surfaces of the anode plate and the cathode plate are provided with a first inlet and outlet area, a first guide area, a reaction area, a second guide area and a second inlet and outlet area; the first inlet and outlet area and the second guide area respectively comprise a plurality of through openings arranged along the width direction of the anode plate or the cathode plate; the first guide area and the second guide area respectively comprise a plurality of guide flow passages and guide bulges; a plurality of parallel grooves are formed on the front surface and the back surface of the reaction area, and each groove forms a straight flow channel; a communicating groove is formed between adjacent grooves on the front surface of the reaction area, so that gas between adjacent straight flow channels is communicated, the uniform distribution of the gas is ensured, and the moisture generated by the reaction flows towards the gravity direction under the action of gravity, thereby being beneficial to drainage; the reverse sides of the adjacent anode plates are connected with the reverse sides of the cathode plates.
Description
Technical Field
The utility model relates to a hydrogen fuel cell technical field especially relates to a fuel cell metal bipolar plate.
Background
Bipolar plates are important performance elements in fuel cell stacks and are responsible for distributing the anode and cathode gases to the surfaces of the two electrodes, carrying the heat generated by the reaction out of the stack, while separating the fuel from the oxidant, preventing gas permeation.
The metal bipolar plate in the prior art has the following problems: 1. the anode gas inlet and the anode gas outlet are symmetrically arranged, so that the resistance of gas passing in the fuel cell is increased, and the reaction rate of the cell is reduced; 2. the inter-flow channel gases in the anode plate and the cathode plate are difficult to communicate with each other and the water discharge is difficult, resulting in a reduction in the output performance of the fuel cell.
Therefore, there is a need for an improvement of the metal bipolar plate in the prior art to solve the above problems.
Disclosure of Invention
The utility model overcomes prior art's is not enough, provides a fuel cell metal bipolar plate, aims at solving the problem of gaseous resistance grow that passes through among the prior art fuel cell to and gaseous intercommunication, and the difficult problem of drainage between the runner in anode plate and the negative plate.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a fuel cell metal bipolar plate comprising: the cooling liquid flow channel is formed between the anode plate and the cathode plate;
a first inlet and outlet area, a first guide area, a reaction area, a second guide area and a second inlet and outlet area are formed on the front and back surfaces of the anode plate and the cathode plate;
the first inlet and outlet area and the second guide area respectively comprise a plurality of through openings arranged along the width direction of the anode plate or the cathode plate; the through hole on one edge of the anode plate and the cathode plate in the width direction comprises an anode gas inlet, a cooling liquid inlet and a cathode gas outlet, and the through hole on the other edge comprises a cathode gas inlet, a cooling liquid outlet and an anode gas outlet; the anode gas inlet and the anode gas outlet are diagonally arranged, and the cathode gas inlet and the cathode gas outlet are diagonally arranged;
the first guide area and the second guide area respectively comprise a plurality of guide flow channels and guide bulges; a plurality of parallel grooves are formed in the front side and the back side of the reaction area, each groove forms a straight flow channel, and the straight flow channels are parallel to the length direction of the anode plate or the cathode plate; a communicating groove is formed between the adjacent grooves on the front surface of the reaction area and is used for communicating the adjacent straight flow channels on the front surface of the reaction area;
the reverse side of the adjacent anode plate is connected with the reverse side of the cathode plate, and the combination of the straight flow channels on the reverse sides of the anode plate and the cathode plate forms the cooling liquid flow channel.
In a preferred embodiment of the present invention, the communication grooves are arranged in an array.
In a preferred embodiment of the present invention, the thickness of the anode plate and the cathode plate is the same as the depth of the straight flow channel.
In a preferred embodiment of the present invention, the thickness of the anode plate and the cathode plate is 0.07-0.1 mm.
In a preferred embodiment of the present invention, the cathode gas inlet is larger than the anode gas inlet.
In a preferred embodiment of the present invention, the anode plate or the cathode plate located in the first guiding region and the second guiding region is a trapezoid structure, and the upper base and the two sides of the trapezoid structure are respectively connected to the through hole.
In a preferred embodiment of the present invention, the cross-section of the anode plate and the cathode plate located in the reaction region is one of saw-tooth shape and wave shape.
In a preferred embodiment of the present invention, the depth of a plurality of the straight flow channels is equal.
In a preferred embodiment of the present invention, a plurality of positioning holes are disposed at the top corners of the anode plate and the cathode plate.
The utility model provides a defect that exists among the background art, the utility model discloses possess following beneficial effect:
(1) the utility model provides a fuel cell metal bipolar plate is provided with a plurality of intercommunication grooves through a plurality of direct current way surfaces positive at anode plate and negative plate for gas between the adjacent direct current way can the intercommunication, guarantees that gaseous distribution is even, and the moisture that the reaction generated flows to the gravity direction under the action of gravity, is favorable to the drainage.
(2) In the utility model, the anode gas inlet and the anode gas outlet are arranged diagonally, and the cathode gas inlet and the cathode gas outlet are arranged diagonally; compared with the symmetrical arrangement mode in the prior art, the diagonal design enables the resistance of gas to be introduced or discharged to be reduced, and the reaction rate of the fuel cell is improved.
(3) The utility model discloses in through the guide runner in first guide area and the second guide area protruding with the guide for cathode gas, anode gas and coolant liquid diffuse more evenly in bipolar plate's reaction area, and the circulation is more smooth and easy, and it is higher to realize cathode gas and anode gas efficiency in membrane electrode reaction, and it is better to realize that the coolant liquid dispels the heat in membrane electrode reaction.
(4) The utility model discloses make 0.07 ~ 0.1 mm's thickness with anode plate and negative plate, improve bipolar plate's high thermal conductivity ability and heat dispersion, reduced the volume of pile for the power density grow of pile.
(5) The utility model discloses according to the difference of anode gas and cathode gas on diffusion rate and demand, the cathode gas entry is greater than the anode gas entry for cathode gas and anode gas distribute evenly and the reaction is abundant, and then improve the output capacity of battery.
Drawings
The present invention will be further explained with reference to the drawings and examples;
fig. 1 is a schematic structural view of an anode plate of a preferred embodiment of the present invention;
fig. 2 is a schematic structural view of a cathode plate according to a preferred embodiment of the present invention;
FIG. 3 is a schematic structural view of the reaction zone of the anode or cathode plate of the preferred embodiment of the invention;
in the figure: 1. an anode plate; 2. a cathode plate; 3. a first access area; 31. an anode gas inlet; 32. a coolant inlet; 33. a cathode gas outlet; 4. a first guide area; 41. a guide flow passage; 42. a guide projection; 5. a reaction zone; 51. a straight flow channel; 52. a communicating groove; 6. a second guide area; 7. a second access area; 71. a cathode gas inlet; 72. a coolant outlet; 73. an anode gas outlet; 8. a coolant flow passage; 9. and (7) positioning the holes.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and illustrate, by way of illustration only, the basic structure of the invention, and which therefore show only the constituents relevant to the invention.
The utility model provides a fuel cell metal bipolar plate. The metallic bipolar plate is not limited to stainless steel, titanium, aluminum, copper, or silver materials. The bipolar plate includes: an anode plate 1, a cathode plate 2, and a coolant flow channel 8 formed between the anode plate 1 and the cathode plate 2.
As shown in fig. 1 and 2, schematic structural views of an anode plate 1 and a cathode plate 2 are shown. The anode plate 1 and the cathode plate 2 are both rectangular structures. The positive and negative surfaces of the anode plate 1 and the cathode plate 2 are formed with a first inlet and outlet area 3, a first guide area 4, a reaction area 5, a second guide area 6 and a second inlet and outlet area 7.
The first inlet and outlet area 3 and the second guide area 6 both include a plurality of through holes arranged along the width direction of the anode plate 1 or the cathode plate 2, and the through holes are used for introducing or discharging anode gas, cathode gas or cooling water. Preferably, the through-holes of one edge in the width direction of the anode plate 1 and the cathode plate 2 include an anode gas inlet 31, a coolant inlet 32 and a cathode gas outlet 33, and the through-holes of the other edge include a cathode gas inlet 71, a coolant outlet 72 and an anode gas outlet 73; the anode gas inlet 31 and the anode gas outlet 73 are diagonally disposed, and the cathode gas inlet 71 and the cathode gas outlet 33 are diagonally disposed.
The utility model discloses according to anode gas and cathode gas difference on diffusion rate and demand, cathode gas entry 71 is greater than anode gas entry 31 for cathode gas and anode gas distribute evenly and the reaction is abundant, and then improve the output capacity of battery.
The first guide area 4 and the second guide area 6 both comprise a plurality of guide flow channels 41 and guide protrusions 42, so that cathode gas, anode gas and cooling liquid are diffused more uniformly in the reaction area 5 of the bipolar plate and circulate more smoothly, the efficiency of the cathode gas and the anode gas in membrane electrode reaction is higher, and the cooling liquid is better radiated in the membrane electrode reaction.
The utility model discloses well be located first guide area 4 and second guide area 6 anode plate 1 or negative plate 2 and be the trapezium structure, the last base and the both sides limit of trapezium structure communicate respectively and run through the mouth. This structure allows each through opening to be diffused or discharged in the direction indicated by the first guide area 4 or the second guide area 6.
The front and back of the reaction area 5 are formed with a plurality of parallel grooves, each groove forms a straight flow channel 51, and the straight flow channel is parallel to the length direction of the anode plate or the cathode plate.
The reverse sides of the adjacent anode plate 1 and the cathode plate 2 are connected, and the combination of a plurality of straight flow channels 51 on the reverse sides of the anode plate 1 and the cathode plate 2 forms a cooling liquid flow channel 8. Through inciting somebody to action the utility model discloses an anode plate 1 and negative plate 2 series connection, bipolar plate set up in the both sides of membrane electrode, and anode plate 1, negative plate 2 and membrane electrode form a fuel cell's unit. And the direct current passages 51 of the opposite surface of the anode plate 1 and the opposite surface of the cathode plate 2 between each adjacent unit form the coolant flow passage 8 for each unit so that the coolant is on the surface of each fuel cell.
The cross-section of the anode plate 1 and the cathode plate 2 in the reaction area 5 of the utility model is zigzag or wave. Preferably, the reaction regions 5 of the anode plate 1 and the cathode plate 2 are selected to have a zigzag shape as shown in fig. 3, and the depths of the straight flow channels 51 in the zigzag anode plate 1 and the zigzag cathode plate 2 are equal. The zigzag shape is formed by means of punching, and the front and back surfaces of the reaction regions 5 of the anode plate 1 and the cathode plate 2 are formed with straight flow channels 51 of uniform depth. The structure enables the thickness of the anode plate 1 and the cathode plate 2 to be consistent with the depth of the direct current channel 51, the thickness of the anode plate 1 and the thickness of the cathode plate 2 are both 0.07-0.1 mm, the thickness of the anode plate 1 or the cathode plate 2 is further reduced, the high heat conductivity performance and the heat dissipation performance of the bipolar plate are improved, the size of the electric pile is reduced, and the power density of the electric pile is increased.
In the utility model, a communicating groove 52 is formed between adjacent grooves on the front surface of the reaction area 5 and is used for communicating adjacent straight flow channels 51 on the front surface of the reaction area 5; the communicating grooves 52 are arranged in an array, so that the gas between the adjacent straight flow channels 51 can be communicated, the uniform distribution of the gas is ensured, and the moisture generated by the reaction flows towards the gravity direction under the action of gravity, which is beneficial to drainage.
The utility model discloses well adjacent intercommunication groove 52 forms the runner, and this runner makes water distribute more evenly in direct current way 51, and under the certain circumstances of anode gas outlet gas pressure loss, and loss of pressure gradient grow realizes quick drainage, avoids the water logging that the reaction produced not to have the condition of electrode.
The utility model discloses well anode plate 1 and negative plate 2's apex angle department is provided with a plurality of locating holes 9, and this kind of structure makes anode plate 1 and negative plate 2 fix a position more accurately.
When the utility model is used, anode gas flows to the flow channel in the anode plate 1 through the anode gas inlet 31; after entering the flow channel, the anode gas diffuses towards the direct current channel 51 of the reaction area 5 of the anode plate 1 along the direction indicated by the first guide area 4, and the anode gas passes through the guide flow channel 41 and the guide protrusion 42, so that the diffusion of the anode gas in the reaction area 5 is more uniform, and the highest reaction efficiency of the anode gas in the membrane electrode is achieved; the reacted anode gas is discharged from the anode gas outlet 73 through the second guide region 6 in a direction indicated.
Meanwhile, the cathode gas flows to the flow channel in the cathode plate 2 through the cathode gas inlet 71; after entering the flow channel, the cathode gas diffuses toward the direct current channel 51 of the reaction area 5 inside the cathode plate 2 along the direction indicated by the second guide area 6; the cathode gas passes through the guide flow channel 41 and the guide protrusion 42, so that the cathode gas is diffused more uniformly in the reaction region 5, and the reaction efficiency of the cathode gas in the membrane electrode is highest; the reacted cathode gas is discharged from the anode gas outlet 73 through the first guide region 4 in the indicated direction; the water produced after the fuel cell reaction is more easily discharged through the direct flow path 51. Meanwhile, the coolant flows into the cooling flow channel through the coolant inlet 32; the cooling liquid is uniformly diffused through the structures of the guide flow channel 41 and the guide protrusion 42, and the plurality of communication grooves 52 are formed between the adjacent straight flow channels 51 on the front surfaces of the anode plate 1 and the cathode plate 2, so that the gas between the adjacent straight flow channels 51 can be communicated, the uniform distribution of the gas is ensured, and the water generated by the reaction flows in the gravity direction under the action of gravity, thereby being beneficial to drainage.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A fuel cell metal bipolar plate comprising: an anode plate, a cathode plate, and a coolant flow channel formed between the anode plate and the cathode plate,
a first inlet and outlet area, a first guide area, a reaction area, a second guide area and a second inlet and outlet area are formed on the front and back surfaces of the anode plate and the cathode plate;
the first inlet and outlet area and the second guide area respectively comprise a plurality of through openings arranged along the width direction of the anode plate or the cathode plate; the through hole on one edge of the anode plate and the cathode plate in the width direction comprises an anode gas inlet, a cooling liquid inlet and a cathode gas outlet, and the through hole on the other edge comprises a cathode gas inlet, a cooling liquid outlet and an anode gas outlet; the anode gas inlet and the anode gas outlet are diagonally arranged, and the cathode gas inlet and the cathode gas outlet are diagonally arranged;
the first guide area and the second guide area respectively comprise a plurality of guide flow channels and guide bulges; a plurality of parallel grooves are formed in the front side and the back side of the reaction area, each groove forms a straight flow channel, and the straight flow channels are parallel to the length direction of the anode plate or the cathode plate; a communicating groove is formed between the adjacent grooves on the front surface of the reaction area and is used for communicating the adjacent straight flow channels on the front surface of the reaction area;
the reverse side of the adjacent anode plate is connected with the reverse side of the cathode plate, and the combination of the straight flow channels on the reverse sides of the anode plate and the cathode plate forms the cooling liquid flow channel.
2. A fuel cell metallic bipolar plate as in claim 1, wherein: the cathode gas inlet is larger than the anode gas inlet.
3. A fuel cell metallic bipolar plate as in claim 1, wherein: the communication grooves are arranged in an array.
4. A fuel cell metallic bipolar plate as in claim 1, wherein: the thickness of the anode plate and the cathode plate is consistent with the depth of the straight flow channel.
5. A fuel cell metallic bipolar plate as in claim 1, wherein: the thickness of the anode plate and the thickness of the cathode plate are both 0.07-0.1 mm.
6. A fuel cell metallic bipolar plate as in claim 1, wherein: the anode plate or the cathode plate positioned in the first guide area and the second guide area is of a trapezoid structure, and the upper bottom edge and the two side edges of the trapezoid structure are respectively communicated with the through hole.
7. A fuel cell metallic bipolar plate as in claim 1, wherein: the cross section of the anode plate and the cathode plate positioned in the reaction area is in one of sawtooth shapes or wave shapes.
8. A fuel cell metallic bipolar plate as in claim 1, wherein: the depths of the straight flow channels are equal.
9. A fuel cell metallic bipolar plate as in claim 1, wherein: and a plurality of positioning holes are formed in the vertex angles of the anode plate and the cathode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221146185.3U CN216850002U (en) | 2022-05-13 | 2022-05-13 | Metal bipolar plate of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221146185.3U CN216850002U (en) | 2022-05-13 | 2022-05-13 | Metal bipolar plate of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216850002U true CN216850002U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221146185.3U Active CN216850002U (en) | 2022-05-13 | 2022-05-13 | Metal bipolar plate of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216850002U (en) |
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- 2022-05-13 CN CN202221146185.3U patent/CN216850002U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221019 Address after: 237000 Meishanhu Road, Jinzhai Economic Development Zone (Modern Industrial Park), Lu'an City, Anhui Province Patentee after: Anhui Helian Technology Co.,Ltd. Address before: 215000 101, building 5, 78 Keling Road, science and Technology City, high tech Zone, Suzhou City, Jiangsu Province Patentee before: Suzhou hydrogen LAN Technology Co.,Ltd. |