Metal polar plate and bipolar plate

Abstract

The invention provides a metal polar plate and a bipolar plate, and relates to the technical field of fuel cells. The metal polar plate comprises a polar plate body and a flow distribution structure, the polar plate body is provided with a first flow distribution part, a flow field part and a second flow distribution part, the flow field part is respectively stamped on a first plate surface and a second plate surface of the polar plate body to form a plurality of first flow field runners and a plurality of second flow field runners, and the first flow distribution part and the second flow distribution part are stamped on the first plate surface to form first convex structures; a first concave structure is formed on the first plate surface and the second plate surface; the two flow distribution structures are arranged on the first flow distribution part and the second flow distribution part correspondingly, each flow distribution structure is provided with a plurality of second protruding structures formed on the first plate face of the metal plate body in a stamping mode, a plurality of second concave structures are formed on the second plate face of the metal plate body, the second protruding structures form a plurality of first flow channels, the first concave structures form second flow channels, and the second concave structures form second flow channels. The plurality of second recessed structures are arranged in the second flow channel.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cells, and in particular to a metal polar plate and a bipolar plate. Background Art

[0002] With the improvement of environmental awareness, clean energy technology has attracted much attention. Fuel cells convert hydrogen and oxygen into electricity through electrochemical reactions, producing only water. They are highly efficient, pollution-free and low-noise. They are widely used in transportation, fixed power generation and heating, and are considered to be one of the key technologies for future energy solutions.

[0003] A fuel cell stack consists of bipolar plates, membrane electrodes, current collectors, insulating plates and end plates. Bipolar plates play a vital role in distributing hydrogen and oxygen, removing water and heat generated by the reaction, and providing electron conduction paths and structural support. Common bipolar plate materials include graphite, metal and composite materials, each of which is adapted to different application requirements.

[0004] However, the traditional bipolar plate design has defects and it is difficult to balance the flow resistance between the air cavity, hydrogen cavity and cooling cavity. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a metal plate and a bipolar plate to solve the problem that the traditional bipolar plate design has defects and it is difficult to balance the flow resistance between the air cavity, the hydrogen cavity and the cooling cavity.

[0006] To solve the above technical problems, the embodiments of the present disclosure provide the following technical solutions:

[0007] The first aspect of the present disclosure provides a metal plate, comprising:

[0008] The plate body comprises a first flow distribution part, a flow field part and a second flow distribution part, which are arranged in sequence along the length direction of the plate body. The flow field part is respectively stamped on the first plate surface and the second plate surface of the plate body to form a plurality of first flow field flow channels and a plurality of second flow field flow channels. The first flow distribution part and the second flow distribution part are both stamped on the first plate surface to form a first convex structure, and form a first concave structure with the second plate surface;

[0009] A flow distribution structure, wherein the two flow distribution structures are respectively arranged at the first flow distribution part and the second flow distribution part, the flow distribution structure has a plurality of second convex structures stamped on the first plate surface of the metal plate body, and a plurality of second concave structures are formed on the second plate surface, the plurality of second convex structures constitute a plurality of first flow channels, the first concave structures constitute a second flow channel, and the plurality of second concave structures are arranged in the second flow channel;

[0010] The air inlet and the air outlet of the plate body are both connected to the multiple first flow field flow channels through the multiple first flow channels, and the cooling inlet and the cooling outlet of the plate body are both connected to the multiple second flow field structures through the second flow channels.

[0011] Furthermore, the flow distribution structure includes:

[0012] A plurality of first protrusion groups, each of which is provided with a plurality of second protrusion structures arranged at intervals along the length direction of the second protrusion structure, and the plurality of first protrusion groups are arranged at intervals along the length direction perpendicular to the second protrusion structure;

[0013] Multiple second protrusion groups, each second protrusion group is provided with multiple second protrusion structures arranged at intervals along the length direction of the second protrusion structure, the second protrusion group is arranged between two adjacent first protrusion groups, and the gap area between two adjacent second protrusion structures along the length direction of the second protrusion structure is located between two adjacent second protrusion structures along the direction perpendicular to the length direction of the second protrusion structure.

[0014] Furthermore, the flow distribution structure also includes:

[0015] Inner grooves, multiple inner grooves are stamped and formed on the first plate surface to form raised columns on the second plate surface, and the multiple inner grooves are respectively arranged in multiple gap areas, and the depth of the inner grooves is equal to the sum of the heights of the first raised structure and the second raised structure.

[0016] Furthermore, the air inlet is located on one side of the cooling inlet along the width direction of the electrode body, and the plurality of first flow channels of the first flow distribution part are inclined so that the plurality of first flow channels of the first flow distribution part can communicate with the inlets of the plurality of first flow field flow channels;

[0017] The air outlet is located on one side of the cooling outlet along the width direction of the electrode body and away from the air inlet direction. The multiple first flow channels of the second distribution part are inclined so that the multiple first flow channels of the second distribution part can connect to the outlets of the multiple first flow field flow channels.

[0018] Furthermore, the first distribution part has a first area and a second area on the first plate surface, the first area is located between the air inlet and the second area, and from the first area to the second area, a plurality of first flow channels are bent toward the coolant inlet along the other side of the plate body;

[0019] The second distribution part has a third area and a fourth area on the first plate surface, the third area is located between the air outlet and the fourth area, and multiple first flow channels from the third area to the fourth area are bent toward the cooling inlet along the other side of the plate body.

[0020] Furthermore, the metal plate also includes:

[0021] A first communication port, the first communication port is arranged between the first protruding structure of the first distribution part and the air inlet, and the air inlet is connected with the inlet of the first flow channel through the first communication port;

[0022] The second communicating port is arranged between the first protruding structure of the second flow distribution part and the air outlet, and the air outlet is communicated with the outlet of the first flow channel through the second communicating port.

[0023] Furthermore, the metal plate also includes:

[0024] A third recessed structure is formed by stamping on the second plate surface and is located at a side of the first flow distribution portion away from the flow field area, and the cooling inlet is connected to the second flow channel inlet through the third recessed structure;

[0025] The fourth recessed structure is formed by stamping on the second plate surface and is located on a side of the second distribution portion away from the flow field area. The cooling inlet is connected to the second flow channel outlet through the fourth recessed structure.

[0026] Furthermore, the height of the first protruding structure is 0.05-0.15 mm.

[0027] Furthermore, the second protruding structure is 0.15-0.35 mm higher than the first protruding structure.

[0028] A second aspect of the present disclosure provides a bipolar plate, which includes the metal plate provided by the first aspect of the present disclosure.

[0029] A bipolar plate provided in the second aspect of the present disclosure can directly use a metal plate provided in the first aspect. The specific implementation structure can refer to the relevant content described in the first aspect, which will not be repeated here.

[0030] The first aspect of the present disclosure provides a metal electrode plate, which is provided with an electrode body and a distribution structure; the electrode body is provided with a first distribution part, a flow field part and a second distribution part, and the three are arranged in sequence along the length direction of the electrode body, and the flow field part is respectively stamped on the first plate surface and the second plate surface of the electrode body to form a plurality of first process flow channels and a plurality of second flow field flow channels, and the first distribution part and the second distribution part are both stamped on the first plate surface to form a first convex structure, and form a first concave structure on the first plate surface; two distribution structures are respectively arranged on the first distribution part and the second distribution part, and the distribution structure has a plurality of second convex structures stamped on the first plate surface of the metal plate body, and a plurality of second concave structures are formed on the second plate surface, and the plurality of second convex structures constitute a plurality of first flow channels, and the first concave structure constitutes a second flow channel. When the fluid flows through multiple second protrusion structures, it can be diverted by the second protrusion structures, so that the first flow channel formed by the multiple second protrusion structures can effectively balance the flow resistance inside the first distribution part and the second distribution part of the first plate surface of the metal plate, and the second recessed structure is formed together with the second protrusion structure after stamping, and its arrangement corresponds to the second protrusion structure, so the second flow channel provided with multiple second recessed structures can balance the flow resistance of the second flow channel and the second distribution part of the second plate surface where the first distribution part and the second distribution part are respectively located. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0032] Figure 1 The schematic diagram of the structure of the first plate surface of the anode plate is schematically shown;

[0033] Figure 2 A partial enlarged view of the first plate surface N of the anode plate is schematically shown;

[0034] Figure 3 A partial enlarged view of the first plate surface O of the anode plate is schematically shown;

[0035] Figure 4 The schematic diagram of the structure of the second plate surface of the anode plate is schematically shown;

[0036] Figure 5 A partial enlarged view of the second plate surface P of the anode plate is schematically shown;

[0037] Figure 6 The schematic diagram of the structure of the first plate surface of the cathode plate is shown schematically;

[0038] Figure 7 A partial enlarged view of the first plate surface Q portion of the cathode plate is schematically shown;

[0039] Figure 8 The structural diagram of the bipolar plate is schematically shown.

[0040] Description of Figure Numbers:

[0041] 1. Plate body; 101. First flow distribution part; 102. Second flow distribution part; 103. Flow field part; 1031. First flow field flow channel; 1032. Second flow field flow channel; 103. First convex structure; 104. First concave structure;

[0042] 2. flow distribution structure; 201. second protruding structure; 202. second concave structure; 203. first flow channel; 204. inner groove; 205. protruding column;

[0043] 3. First connecting port; 4. Second connecting port; 5. Fuel air inlet; 6. Fuel air outlet; 7. Combustion air inlet; 8. Combustion air outlet; 9. Cooling inlet; 10. Cooling outlet; 11. Third recessed structure; 12. Fourth recessed structure; 13. Anode plate; 14. Cathode plate;

[0044] A, first protrusion group; B, second protrusion group; C, first plate surface; D, second plate surface; E, gap area; F, first area; G, second area; H, third area; I, fourth area; J, first preset angle; K, second preset angle; L, third preset angle; M, fourth preset angle. DETAILED DESCRIPTION

[0045] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0046] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0047] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0048] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0049] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0050] Embodiment 1

[0051] like Figure 1-7As shown. A metal electrode provided in Example 1 of the first aspect of the present disclosure comprises: an electrode body 1 and a distribution structure 2; the electrode body 1 comprises a first distribution part 101, a flow field part 103 and a second distribution part 102, which are arranged in sequence along the length direction of the electrode body 1, the flow field part 103 is respectively stamped on the first plate surface C and the second plate surface D of the electrode body 1 to form a plurality of first flow field channels 1031 and a plurality of second flow field channels 1032, the first distribution part 101 and the second distribution part 102 are both stamped on the first plate surface C to form a first convex structure 103, and form a first concave structure 104 on the second plate surface D; the two distribution structures 2 are divided into They are respectively arranged in the first distribution part 101 and the second distribution part 102, the distribution structure 2 has a plurality of second convex structures 201 stamped on the first plate surface C of the metal plate body, and a plurality of second concave structures 202 are formed on the second plate surface D, the plurality of second convex structures 201 constitute a plurality of first flow channels 203, the first concave structures 104 constitute a second flow channel, and the plurality of second concave structures 202 are arranged in the second flow channel; the air inlet and the air outlet of the plate body 1 are connected with the plurality of first flow field channels 1031 through the plurality of first flow channels 203, and the cooling inlet 9 and the cooling outlet 10 of the plate body 1 are connected with the plurality of second flow field structures through the second flow channels.

[0052] Specifically, the plate body 1 can be a standard metal plate body 1 in the prior art, and is not specifically limited. The plate body 1 is provided with an air inlet and an air outlet at both ends along the length direction, and the cooling inlet 9 and the cooling outlet 10 are also provided on both sides of the plate body 1 along the length direction. The air inlet mainly includes a fuel air inlet 5 and a combustion-supporting air inlet 7. The air outlet mainly includes a fuel air outlet 6 and a combustion-supporting air outlet 8, and the specific position of each port is not limited.

[0053] In this embodiment, the fuel air inlet 5 and the combustion air inlet 7 are respectively arranged on both sides of the cooling inlet 9 along the width direction of the plate body 1, and the fuel air outlet 6 and the combustion air outlet 8 are respectively arranged on both sides of the cooling outlet 10 along the width direction of the plate body 1, and the fuel air outlet 6 is directly opposite to the combustion air inlet 7, and the combustion air outlet 8 is directly opposite to the fuel air inlet 5. When the distribution structure 2 of the first distribution part 101 is connected with the fuel air inlet 5, and the distribution structure 2 of the second distribution part 102 is connected with the fuel air outlet 6, the metal plate is the anode plate 13, and when the distribution structure 2 of the first distribution part 101 is connected with the combustion air inlet 7, and the distribution structure 2 of the second distribution part 102 is connected with the combustion air outlet 8, the metal plate is the anode plate 13.

[0054] The middle part of the electrode body 1 is the flow field part 103, and the two sides of the flow field part 103 are respectively the first distribution part 101 and the second distribution part 102. The first distribution part 101 is provided with an air inlet and a cooling inlet 9 on the side away from the flow field part 103, and the second distribution part 102 is provided with an air inlet and a cooling outlet 10 on the side away from the process part. The distribution structure 2 is arranged on the first distribution part 101 and the second distribution part 102. The first distribution part 101 and the second distribution part 102 are respectively stamped on the first plate surface C on both sides of the flow field part 103 along the length direction of the electrode plate to form two first convex structures 103, so as to form a first recessed structure 104 on the second plate surface D. The first recessed structure 104 constitutes a second channel to connect the cooling inlet 9 and multiple second flow field channels 1032. The two distribution structures 2 are respectively arranged on the first plate surface C and the second plate surface D. It can be understood that the two distribution structures 2 are respectively arranged on the two first convex structures 103. The first convex structure 103 and the second convex structure 201 can be columnar convexities or long strip convexities, which can be selected according to actual needs. The specific arrangement of the multiple second convex structures 201 is not limited and can be selected according to specific needs. When the inflowing fluid passes through the second protruding structure 201, it will be divided by the second protruding structure 201 to divide the inflowing fluid into multiple parts and distribute them to the first flow field flow channel 1031. Since the second concave structure 202 is formed together with the second protruding structure 201 during stamping, the first distribution part 101 and the second distribution part 102 are provided with blocking parts on the peripheral sides of the first plate surface C and the second plate surface D to prevent the fluid from flowing through the first distribution part 101 and the second distribution part 102 and flowing to other parts.

[0055] The first aspect of the present disclosure provides a metal plate, which is provided with a plate body 1 and a distribution structure 2; the plate body 1 is provided with a first distribution part 101, a flow field part 103 and a second distribution part 102, which are arranged in sequence along the length direction of the plate body 1, and the flow field part 103 and the first plate surface C and the second plate surface D of the plate body 1 are respectively stamped to form a plurality of first process flow channels and a plurality of second flow field flow channels 1032, and the first distribution part 101 and the second distribution part 102 are both connected to the first A first protruding structure 103 is stamped on the plate surface C, and a first recessed structure 104 is formed on the first plate surface C; two distribution structures 2 are respectively arranged on the first distribution part 101 and the second distribution part 102, and the distribution structure 2 has a plurality of second protruding structures 201 stamped on the first plate surface C of the metal plate body, and a plurality of second recessed structures 202 are formed on the second plate surface D, the plurality of second protruding structures 201 constitute a plurality of first flow channels 203, and the first recessed structures 104 constitute a second flow channel. When the fluid flows through the multiple second protrusion structures 201, it can be diverted by the second protrusion structures 201, so that the first flow channel 203 formed by the multiple second protrusion structures 201 can effectively balance the flow resistance inside the first distribution part 101 and the second distribution part 102 of the first plate surface C of the metal plate, and the second recessed structure 202 is formed together with the second protrusion structure 201 after stamping, and its arrangement corresponds to the second protrusion structure 201, so the second flow channel provided with multiple second recessed structures 202 can balance the flow resistance of the second flow channel and the second distribution part 102 formed by the second plate surface D where the first distribution part 101 and the second distribution part 102 are respectively located.

[0056] like Figure 2 , 3 As shown, in some embodiments, the distribution structure 2 includes: a plurality of first protrusion groups A and a plurality of second protrusion groups B; each first protrusion group A is provided with a plurality of second protrusion structures 201 arranged at intervals along the length direction of the second protrusion structure 201, and the plurality of first protrusion groups A are arranged at intervals along the length direction perpendicular to the second protrusion structure 201; each second protrusion group B is provided with a plurality of second protrusion structures 201 arranged at intervals along the length direction of the second protrusion structure 201, the second protrusion group B is arranged between two adjacent first protrusion groups A, and a gap area E between two adjacent second protrusion structures 201 along the length direction of the second protrusion structure 201 is located between two adjacent second protrusion structures 201 along the length direction perpendicular to the second protrusion structure 201.

[0057] Specifically, the second protrusion structure 201 can be in the shape of a long strip, and the extension direction of the length of the second protrusion structure 201 is not specifically limited, and can be at a preset angle to the width direction of the electrode body 1. Multiple first protrusion groups A extend in a diffused manner toward the flow field part 103, and can be specifically arranged according to the positions of the air inlet and the air outlet. It is necessary to ensure that the gas flowing out of the air inlet can be distributed to the first flow field channel 1031 through the multiple second protrusion structures 201 and the first protrusion structure 103 arranged in the first distribution part 101, and the gas flowing out of the first flow channel 203 can be distributed to the second flow field channel 1032 through the multiple second protrusion structures 201 arranged in the second distribution part 102.

[0058] The length direction of the plurality of second protrusion structures 201 in the plurality of second protrusion groups B may be parallel to the length direction of the second protrusion structures 201 in the plurality of first protrusion groups A. The gap region E between two adjacent second protrusion structures 201 along the length direction of the second protrusion structures 201 is located between two adjacent second protrusion structures 201 along the length direction perpendicular to the second protrusion structures 201. It can be understood that along the length direction perpendicular to the second protrusion structures 201, the gap region between the two second protrusion structures 201 is alternately arranged with the second protrusion structures 201. The plurality of first protrusion groups A and the second protrusion groups B are arranged to form a plurality of first flow channels 203, and the correspondingly formed second recessed structures 202 form a second flow channel. When the fluid flows to the multiple second protrusion structures 201 and the spacing area, the fluid is divided into multiple parts, so that the fluid flowing into the distribution structure 2 is divided into multiple parts and distributed to the first flow field flow channel 1031, or the fluid flows out of the first flow field flow channel 1031 and is distributed to the air outlet, so that the fluid distribution can be more uniform and the fluid flow resistance can be reduced. Similarly, the multiple second recessed structures 202 can divide the coolant into multiple parts, so that the coolant distribution can be more uniform and the coolant flow resistance can be reduced.

[0059] like Figure 2 , 3 As shown in Figures 5 and 7, in some embodiments, the distribution structure 2 also includes: an inner groove 204, a plurality of inner grooves 204 are stamped and formed on the first plate surface C to form a protruding column 205 on the second plate surface D, and the plurality of inner grooves 204 are respectively arranged in a plurality of gap areas E, and the depth of the inner groove 204 is equal to the sum of the heights of the first protruding structure 103 and the second protruding structure 201.

[0060] Specifically, during the use of the metal plate, after the two second plate surfaces D of the cathode plate 14 and the anode plate 13 are buckled correspondingly, the second flow channels set on the second plate surfaces D of the cathode plate 14 and the anode plate 13 are buckled together to form a flow space for the flow of the coolant, so that the coolant can flow into the multiple second flow field channels 1032 through the flow space formed by the second channel, or flow out from the second flow field channels 1032 to the cooling outlet 10. The inner groove 204 set on the first plate surface C can form a plurality of raised columns 205 on the second plate surface D, and the plurality of raised columns 205 can provide effective support for the flow space formed after the cathode plate 14 and the anode plate 13 are buckled, so as to improve the overall strength of the bipolar plate composed thereof. At the same time, the inner groove 204 and the raised columns 205 can effectively increase the flow distribution effect.

[0061] like Figure 1-7 As shown, in some embodiments, the air inlet is located on one side of the cooling inlet 9 along the width direction of the electrode body 1, and the multiple first flow channels 203 of the first distribution part 101 are inclined so that the multiple first flow channels 203 in the first distribution part 101 can connect to the inlets of the multiple first flow field channels 1031; the air outlet is located on the cooling outlet 10 along the width direction of the electrode body 1 and away from the air inlet direction. The multiple first flow channels 203 of the second distribution part 102 are inclined so that the multiple first flow channels 203 in the second distribution part 102 can connect to the outlets of the multiple first flow field channels 1031.

[0062] When the metal plate is the anode plate 13, the air inlet is the fuel air inlet 5, the air outlet is the fuel air outlet 6, and the fuel air inlet 5 and the fuel air outlet 6 are staggered along the width direction of the metal plate. Arranging the multiple first flow channels 203 located in the first distribution part 101 in an inclined shape can effectively distribute the fuel from the air inlet located on the side of the cooling inlet 9 to all the first flow field flow channels 1031. Similarly, arranging the first flow channel 203 of the second distribution part 102 in an inclined shape can allow the fuel to flow from the outlet of the first distribution flow channel through the flow channel arranged in the second distribution part 102 to the air outlet through a smaller flow resistance. Specifically, the inclination angle of the first distribution flow channel can be selected according to the actual situation such as the width of the first distribution part 101 and the second distribution part 102 along the metal plate, and the width and quantity of the first distribution flow channel and the first flow channel 203.

[0063] When the metal electrode plate is the cathode plate 14, the air inlet is the combustion-supporting air inlet 7, and the air outlet is the combustion-supporting air outlet 8. The combustion-supporting air inlet 7 is arranged on the side of the cooling inlet 9 away from the fuel air inlet 5, and the combustion-supporting air outlet 8 is arranged on the side of the cooling outlet 10 away from the fuel air outlet 6. The configuration and effect of the first flow channel 203 are similar to those of the anode plate 13 and will not be repeated here.

[0064] like Figure 2 , 3 As shown in Figures 5 and 7, in some embodiments, the first distribution portion 101 has a first area F and a second area G on the first plate surface C, the first area F is located between the air inlet and the second area G, and from the first area F to the second area G, multiple first flow channels 203 are bent toward the other side of the plate body 1 close to the cooling liquid inlet; the second distribution portion 102 has a third area H and a fourth area I on the first plate surface C, the third area H is located between the air outlet and the fourth area I, and from the third area H to the fourth area I, multiple first flow channels 203 are bent toward the other side of the plate body 1 close to the cooling outlet 10.

[0065] Specifically, the air inlet is located at one side of the cooling inlet 9 , and the air outlet is located at one side of the cooling outlet 10 , and is staggered with the air inlet. If it is necessary to set a plurality of inclined first flow channels 203 in the first distribution part 101 so that all the first flow field flow channels 1031 can be connected to the air inlet, and it is necessary to set a plurality of inclined first flow channels 203 in the second distribution part 102 so that all the first process flow channels can be connected to the air outlet, then the electrode body 1 needs to have a certain width, and from the first area F to the second area G, the plurality of first flow channels 203 are bent toward the other side of the electrode body 1 close to the coolant inlet. It can be understood that the length direction of the second protruding structure 201 in the first area F has a first preset angle J with the length direction of the electrode body 1, and the length direction of the second protruding structure 201 in the second area G has a second preset angle K with the length direction of the electrode body 1, and the first preset angle J is smaller than the second preset angle K, so that the plurality of first flow channels 203 set with the first distribution part 101 are bent toward the direction close to the cold zone inlet at the junction of the first area F and the second area G. Similarly, in the third region H, the length direction of the second protruding structure 201 has a third preset angle L with the length direction of the electrode body 1, and in the fourth region I, the length direction of the second protruding structure 201 has a fourth preset angle M with the length direction of the electrode body 1, and the third preset angle L is smaller than the fourth preset angle M, so that the multiple first flow channels 203 arranged with the second distribution part 102 are bent in the direction close to the cold zone outlet at the intersection of the third region H and the fourth region I.

[0066] like Figure 2 , 3 As shown, in some embodiments, the metal electrode plate also includes: a first connecting port 3 and a second connecting port 4; the first connecting port 3 is arranged between the first protruding structure 103 of the first distribution part 101 and the air inlet, and the air inlet is connected to the inlet of the first flow channel 203 through the first connecting port 3; the second connecting port 4 is arranged between the first protruding structure 103 of the second distribution part 102 and the air outlet, and the air outlet is connected to the outlet of the first flow channel 203 through the second connecting port 4.

[0067] Specifically, the connection method between the first connecting port 3 and the air inlet is not limited, and the connection can be achieved by setting a small hole, and it is not specifically limited. The connection method between the second connecting port 4 and the air outlet can be the same as the connection method between the first connecting port 3 and the air inlet, and it is not specifically limited. The first connecting port 3 is arranged between the first protruding structure 103 of the first distribution part 101 and the air inlet, that is, the first connecting port 3 and the first protruding structure 103 have a height difference, and the gas released from the air inlet accumulates at the first connecting port 3, and then moves to the first protruding structure 103 in the direction away from the first plate surface C, so that it can effectively provide a buffer for the gas, better guide the gas, and reduce the flow resistance. The relationship between the second connecting port 4 and the first protruding structure 103 located in the second distribution part 102 is similar to the relationship between the first connecting port 3 and the first protruding structure 103 located in the first distribution part 101, and will not be repeated here.

[0068] like Figure 2 , 3 As shown in Figures 5 and 7, in some embodiments, the metal electrode plate further includes: a third recessed structure 11 and a fourth recessed structure 12; the third recessed structure 11 is stamped on the second plate surface D and is located on the side of the first distribution part 101 away from the flow field area, and the cooling inlet 9 is connected to the second flow channel inlet through the third recessed structure 11; the fourth recessed structure 12 is stamped on the second plate surface D and is located on the side of the second distribution part 102 away from the flow field area, and the cooling inlet 9 is connected to the second flow channel outlet through the fourth recessed structure 12.

[0069] Specifically, the protrusions formed by the third recessed structure 11 and the fourth recessed structure 12 on the first plate surface C have the same height as the second protruding structure 201, and the third recessed structure 11 and the fourth recessed structure 12 form a coolant buffer space on the second plate surface D, so that the cooling inlet 9 and the cooling outlet 10 enter the second flow channel through the two coolant buffer spaces respectively. When the cathode plate 14 and the anode plate 13 are attached together in this way, the distribution of the coolant can be more uniform.

[0070] In some embodiments, the height of the first protruding structure 103 is 0.05-0.15 mm. The second protruding structure 201 is higher than the first protruding structure 103 by 0.15-0.35 mm.

[0071] Specifically, when the flow rate of the gas and the coolant is large, the height of the first protruding structure 103 can be set to 0.15 mm, and when the flow rate of the gas and the coolant is small, the height of the first protruding structure 103 can be set to 0.05 mm. The height of the second protruding structure 201 can also be selected according to the flow rate of the gas and the cold zone liquid, and can also be selected according to the strength requirements of the metal plate constituting the bipolar plate. When the flow rate is small, 0.15 mm can be selected, and when the flow rate is large, 0.35 mm can be selected, without limiting the specific size.

[0072] Embodiment 2

[0073] like Figure 8 As shown, embodiment 2 of the second aspect of the present disclosure provides a bipolar plate, which includes two metal plates provided in the first aspect of the present disclosure.

[0074] Specifically, the two metal plates are the cathode plate 14 and the anode plate 13. Taking the first plate surface C of the formal metal plate as an example, at one end of the length direction of the anode plate 13, a fuel air inlet 5, a cooling inlet 9 and a combustion-supporting air inlet 7 are sequentially arranged along the width direction of the anode plate 13, and at the other end of the length direction of the anode plate 13, a combustion-supporting air outlet 8, a cooling outlet 10 and a fuel air outlet 6 are sequentially arranged along the width direction of the anode plate 13. At one end of the length direction of the cathode plate 14, a combustion-supporting air inlet 7, a cooling inlet 9 and a fuel air inlet 5 are sequentially arranged along the width direction of the cathode plate 14, and at the other end of the length direction of the cathode plate 14, a fuel air outlet 6, a cooling inlet 9 and a combustion-supporting air outlet 8 are sequentially arranged along the width direction of the cathode plate 14. During the installation process of the bipolar plate, the air inlet, air outlet, cooling inlet 9 and outlet of the cathode plate 14 correspond one by one to those of the anode plate 13, and the cathode plate 14 and the anode plate 13 are bonded.

[0075] The metal plate described in the second embodiment can directly use the metal plate provided in the first embodiment. The specific implementation structure can refer to the relevant content described in the first embodiment, which will not be repeated here.

[0076] The bipolar plate provided in the second aspect of the present disclosure includes the metal plate provided in the first aspect of the disclosure. Since the distribution structure 2 of the metal plate has a plurality of second protruding structures 201 formed by stamping on the first plate surface C of the metal plate body, and a plurality of second recessed structures 202 are formed on the second plate surface D, the plurality of second protruding structures 201 constitute a plurality of first flow channels 203, and the plurality of second recessed structures 202 constitute a plurality of second flow channels. When the fluid flows through the plurality of second protruding structures 201, it can be diverted by the second protruding structures 201, so that the first flow channel 203 formed by the plurality of second protruding structures 201 and the first protruding structures 103 can effectively balance the flow resistance inside the first distribution part 101 and the second distribution part 102 of the first plate surface C of the metal plate. At the same time, the plurality of second flow channels provided by the cathode plate 14 and the anode plate 13 are used to balance the flow resistance of the coolant.

[0077] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

[0078] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0079] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

Claims

1. A metal plate, characterized in that: include: A plate body (1), the plate body (1) comprising a first flow distribution part (101), a flow field part (103) and a second flow distribution part (102), the three being arranged in sequence along the length direction of the plate body (1), the flow field part (103) being respectively stamped on a first plate surface (C) and a second plate surface (D) of the plate body (1) to form a plurality of first flow field channels (1031) and a plurality of second flow field channels (1032), the first flow distribution part (101) and the second flow distribution part (102) being both stamped on the first plate surface (C) to form a first convex structure (103), and forming a first concave structure (104) with the second plate surface (D); A flow distribution structure (2), wherein the two flow distribution structures (2) are respectively arranged on the first flow distribution part (101) and the second flow distribution part (102), the flow distribution structure (2) has a plurality of second protruding structures (201) formed by stamping on the first plate surface (C) of the metal plate body, and a plurality of second recessed structures (202) are formed on the second plate surface (D), the plurality of the second protruding structures (201) constitute a plurality of first flow channels (203), the first recessed structures (104) constitute the second flow channels, and the plurality of the second recessed structures (202) are arranged in the second flow channels; The air inlet and the air outlet of the electrode body (1) are both connected to the plurality of first flow field flow channels (1031) through the plurality of first flow channels (203), and the cooling inlet (9) and the cooling outlet (10) of the electrode body (1) are both connected to the plurality of second flow field structures through the second flow channels.

2. The metal plate according to claim 1, characterized in that: The flow distribution structure (2) comprises: A plurality of first protrusion groups (A), each of the first protrusion groups (A) being provided with a plurality of second protrusion structures (201) arranged at intervals along the length direction of the second protrusion structure (201), and the plurality of first protrusion groups (A) being arranged at intervals along the length direction perpendicular to the second protrusion structure (201); A plurality of second protrusion groups (B), each of the second protrusion groups (B) being provided with a plurality of second protrusion structures (201) spaced apart along the length direction of the second protrusion structure (201), the second protrusion group (B) being provided between two adjacent first protrusion groups (A), and a gap region (E) between two adjacent second protrusion structures (201) along the length direction of the second protrusion structure (201) being located between two adjacent second protrusion structures (201) along the length direction perpendicular to the second protrusion structure (201).

3. The metal plate according to claim 2, characterized in that: The flow distribution structure (2) further includes: An inner groove (204), a plurality of the inner grooves (204) are stamped and formed on the first plate surface (C) to form a raised column (205) on the second plate surface (D), the plurality of the inner grooves (204) are respectively arranged in a plurality of the gap areas (E), and the depth of the inner groove (204) is equal to the sum of the heights of the first raised structure (103) and the second raised structure (201).

4. The metal electrode plate according to claim 2 or 3, characterized in that: The air inlet is located on one side of the cooling inlet (9) along the width direction of the electrode body (1); the plurality of first flow channels (203) of the first flow distribution part (101) are inclined so that the plurality of first flow channels (203) of the first flow distribution part (101) can communicate with the inlets of the plurality of first flow field flow channels (1031); The air outlet is located on the side of the cooling outlet (10) along the width direction of the electrode body (1) and away from the air inlet direction, and the plurality of the first flow channels (203) of the second distribution part (102) are inclined so that the plurality of the first flow channels (203) of the second distribution part (102) can be connected to the outlets of the plurality of the first flow field flow channels (1031).

5. The metal plate according to claim 4, characterized in that: The first flow distribution part (101) has a first area (F) and a second area (G) on the first plate surface (C), the first area (F) is located between the air inlet and the second area (G), and from the first area (F) to the second area (G), the plurality of first flow channels (203) are bent toward the coolant inlet along the other side of the plate body (1); The second distribution portion (102) has a third area (H) and a fourth area (I) on the first plate surface (C), and the third area (H) is located between the air outlet and the fourth area (I). The plurality of first flow channels (203) from the third area (H) to the fourth area (I) are bent toward the cooling inlet (9) along the other side of the electrode body (1).

6. The metal plate according to claim 3, characterized in that: Also includes: a first communication port (3), the first communication port (3) being arranged between the first protruding structure (103) of the first flow distribution portion (101) and the air inlet, the air inlet being connected to the inlet of the first flow channel (203) through the first communication port (3); A second communication port (4), wherein the second communication port (4) is arranged between the first protruding structure (103) of the second distribution portion (102) and the air outlet, and the air outlet is connected to the outlet of the first flow channel (203) through the second communication port (4).

7. The metal plate according to claim 1, characterized in that: Also includes: a third recessed structure (11), the third recessed structure (11) being formed by stamping on the second plate surface (D) and being located on a side of the first flow distribution portion (101) away from the flow field area, the cooling inlet (9) being connected to the second flow channel inlet through the third recessed structure (11); A fourth recessed structure (12), wherein the fourth recessed structure (12) is formed by stamping on the second plate surface (D) and is located on a side of the second distribution portion (102) away from the flow field area, and the cooling inlet (9) is connected to the second flow channel outlet through the fourth recessed structure (12).

8. The metal plate according to claim 1, characterized in that: The height of the first protruding structure (103) is 0.05-0.15 mm.

9. The metal plate according to claim 3, characterized in that: The second protruding structure (201) is 0.15-0.35 mm higher than the first protruding structure (103).

10. A bipolar plate, characterized in that: The bipolar plate comprises two metal plates according to any one of claims 1 to 9.

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