Bipolar plate structure and fuel cell

Abstract

The utility model discloses a bipolar plate structure and a fuel cell, both ends of the bipolar plate structure in the length direction are provided with inlet and outlet areas and distribution areas, a reaction area is formed between the distribution areas on both sides, and the inlet and outlet areas and the distribution areas on the corresponding sides share the same area of the bipolar plate structure in the length direction. According to the bipolar plate structure disclosed by the utility model, the inlet / outlet region and the distribution region on the corresponding side share the same region of the bipolar plate structure in the length direction, and the space occupied by the inlet / outlet region and the distribution region on the same side can be reduced in the length direction of the bipolar plate structure, so that a larger setting space can be reserved for a reaction region; therefore, the area proportion of the reaction region in the bipolar plate structure is increased, and the performance and power density of the fuel cell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a bipolar plate structure and a fuel cell. Background Art

[0002] With the world's increasing attention to clean energy and environmental protection, the market demand for fuel cells, as a pollution-free and efficient energy conversion technology, is growing rapidly. In particular, in the fields of transportation, energy, and distributed power generation, fuel cells have broad application prospects. Among them, the plate structure of the fuel cell plays the role of supporting the membrane electrode, distributing the reaction gas, and transmitting the current, making the plate, as the core component of the fuel cell, play a vital role in the performance of the fuel cell. However, the inlet and outlet areas and distribution areas of gas and coolant in the related technology are usually arranged along the length direction of the plate. The inlet and outlet areas and distribution areas of gas and coolant occupy too much space in the length direction of the plate, resulting in a reduction in the space reserved for the reaction zone and the cooling zone, which directly affects the performance and power density of the fuel cell. Therefore, there is room for improvement. Utility Model Content

[0003] In a first aspect, the present invention proposes a bipolar plate structure, which can increase the area ratio of the reaction region to the bipolar plate structure, thereby improving the performance and power density of the fuel cell.

[0004] According to the bipolar plate structure of the embodiment of the first aspect of the present utility model, the bipolar plate structure is formed with inlet and outlet areas and distribution areas at both ends in the length direction, and a reaction area is formed between the distribution areas on both sides. The inlet and outlet areas and the distribution areas on the corresponding sides share the same area of ​​the bipolar plate structure in the length direction.

[0005] According to the bipolar plate structure of the embodiment of the first aspect of the present invention, the inlet and outlet areas and the distribution areas on the corresponding sides share the same area of ​​the bipolar plate structure in the length direction. In the length direction of the bipolar plate structure, the space occupied by the inlet and outlet areas and the distribution areas on the same side can be reduced, so that a larger setting space can be reserved for the reaction area to increase the area ratio of the bipolar plate structure occupied by the reaction area, which is beneficial to improving the performance and power density of the fuel cell.

[0006] According to some embodiments of the present invention, the inlet and outlet areas are formed with an anode gas port, a cathode gas port and a coolant port, the coolant port is located between the anode gas and the cathode gas ports in the width direction of the bipolar plate structure, and in the length direction of the bipolar plate structure, the distance between the coolant port and the reaction area is greater than the distance between the anode gas port and the cathode gas port and the reaction area, the anode gas port, the cathode gas port and the coolant port jointly define an arrangement area for arranging the distribution area, and the end of the distribution area close to the reaction area does not exceed the edge of the arrangement area close to the reaction area.

[0007] According to some embodiments of the present invention, the side of the anode gas port adjacent to the arrangement area is the first side, and the side of the cathode gas port adjacent to the arrangement area is the second side. In the direction toward the reaction area, the first side and the second side extend obliquely away from each other.

[0008] According to some embodiments of the present invention, the anode gas port is formed at the angle between the wide side of the bipolar plate structure and one of the long sides, and the cathode gas port is formed at the angle between the wide side of the bipolar plate structure and the other long side. The projections of the anode gas port and the cathode gas port on the reference plane are both triangular, and the reference plane is perpendicular to the thickness direction of the bipolar plate structure.

[0009] According to some embodiments of the present invention, the anode gas port includes a first right-angled side, a second right-angled side and the first side, and the cathode gas port includes a third right-angled side, a fourth right-angled side and the second side, the first right-angled side is perpendicular to the second right-angled side, the third right-angled side is perpendicular to the fourth right-angled side, the first right-angled side and the third right-angled side extend along the length direction of the bipolar plate structure, and the second right-angled side and the fourth right-angled side extend along the width direction of the bipolar plate structure.

[0010] According to some embodiments of the present invention, both the first side and the second side are arc-shaped.

[0011] According to some embodiments of the present invention, the two anode gas ports are respectively an anode gas inlet and an anode gas outlet, the two cathode gas ports are respectively a cathode gas inlet and a cathode gas outlet, the two coolant ports are respectively a coolant inlet and a coolant outlet, the two layout areas are respectively a first layout area and a second layout area, the two distribution areas are respectively a first distribution area and a second distribution area, the anode gas inlet, the cathode gas outlet and the coolant inlet jointly define the first layout area, and the first distribution area is located within the first layout area, the anode gas outlet, the cathode gas inlet and the coolant outlet jointly define the second layout area, and the second distribution area is located within the second layout area.

[0012] According to some embodiments of the present invention, the projection of the coolant port on the reference surface is triangular, and the three sides of the coolant port are respectively a third side, a fourth side and a fifth side connected end to end in sequence, the first side, the second side, the third side and the fourth side jointly define the layout area, and the fifth side extends along the width direction of the bipolar plate structure.

[0013] According to some embodiments of the present invention, the angle between the third side and the fourth side is an obtuse angle.

[0014] A second aspect of the present invention provides a fuel cell.

[0015] A fuel cell according to an embodiment of the second aspect of the present invention includes: the above-mentioned bipolar plate structure.

[0016] According to the fuel cell of the embodiment of the second aspect of the present invention, the inlet and outlet areas and the distribution areas on the corresponding side share the same area of ​​the bipolar plate structure in the length direction. In the length direction of the bipolar plate structure, the space occupied by the inlet and outlet areas and the distribution areas on the same side can be reduced, so that a larger setting space can be reserved for the reaction area to increase the area ratio of the bipolar plate structure occupied by the reaction area, which is beneficial to improving the performance and power density of the fuel cell.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the anode reaction area side of the bipolar plate structure according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of the cathode reaction area side of the bipolar plate structure according to an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of a cooling zone side of a bipolar plate structure according to an embodiment of the present invention;

[0021] Figure 4 It is a partial enlarged view of the cooling liquid port of the bipolar plate structure according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] 100. Bipolar plate structure; 10. Inlet and outlet areas; 11. Anode gas port; 11a. Anode gas inlet; 11b. Anode gas outlet; 111. First side; 112. First right-angled side; 113. Second right-angled side; 12. Cathode gas port; 12a. Cathode gas inlet; 12b. Cathode gas outlet; 121. Second side; 122. Third right-angled side; 123. Fourth right-angled side; 13. Coolant port; 13a. Coolant inlet; 13b. Coolant outlet; 131. Third side; 132. Fourth side; 133. Fifth side; 14. Layout area; 20. Distribution area; 30. Reaction area. DETAILED DESCRIPTION

[0024] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0026] The bipolar plate structure 100 according to an embodiment of the first aspect of the present invention will be described below with reference to the accompanying drawings.

[0027] like Figures 1 to 4As shown, according to the bipolar plate structure 100 of the embodiment of the first aspect of the present invention, the bipolar plate structure 100 is formed with an inlet and outlet area 10 and a distribution area 20 at both ends in the length direction, and a reaction area 30 is formed between the distribution areas 20 on both sides. The inlet and outlet areas 10 and the distribution areas 20 on the corresponding side share the same area of ​​the bipolar plate structure 100 in the length direction.

[0028] That is to say, the reaction area 30 is provided with an inlet and outlet area 10 and a reaction area 30 on both sides of the bipolar plate structure 100 in the length direction. Gases such as fuel gas or oxidant gas and coolant can enter the bipolar plate structure 100 through the inlet and outlet area 10 on one side, and then proceed to the reaction area 30 after being distributed through the distribution area 20 on the corresponding side. They are then gathered to the inlet and outlet area 10 on the other side under the distribution of the distribution area 20 on the other side to be discharged from the bipolar plate structure 100, thereby realizing the circulation of gas and coolant in the bipolar plate structure 100.

[0029] The inlet / outlet region 10 and the distribution region 20 located on the same side of the reaction region 30 share the same area along the length of the bipolar plate structure 100. That is, the area occupied by the inlet / outlet region 10 along the length of the bipolar plate structure 100 overlaps with the area occupied by the distribution region 20 on the same side of the bipolar plate structure 100. Therefore, along the length of the bipolar plate structure 100, the space occupied by the inlet / outlet region 10 and the distribution region 20 on the same side can be reduced, thereby reserving more space for the reaction region 30 and increasing the active area of ​​the reaction region 30, thereby improving the performance and power density of the fuel cell.

[0030] According to the bipolar plate structure 100 of the embodiment of the first aspect of the present invention, the inlet and outlet areas 10 and the distribution area 20 on the corresponding side share the same area of ​​the bipolar plate structure 100 in the length direction. In the length direction of the bipolar plate structure 100, the space occupied by the inlet and outlet areas 10 and the distribution area 20 on the same side can be reduced, so that a larger setting space can be reserved for the reaction area 30, so as to increase the area ratio of the reaction area 30 occupied by the bipolar plate structure 100, which is beneficial to improving the performance and power density of the fuel cell.

[0031] According to some embodiments of the present invention, the inlet and outlet area 10 is formed with an anode gas port 11, a cathode gas port 12 and a coolant port 13. The coolant port 13 is located between the anode gas and cathode gas ports 12 in the width direction of the bipolar plate structure 100. In the length direction of the bipolar plate structure 100, the distance between the coolant port 13 and the reaction area 30 is greater than the distance between the anode gas port 11 and the cathode gas port 12 and the reaction area 30. The anode gas port 11, the cathode gas port 12 and the coolant port 13 jointly define an arrangement area 14 in which the distribution area 20 is arranged. The end of the distribution area 20 close to the reaction area 30 does not exceed the edge of the arrangement area 14 close to the reaction area 30.

[0032] That is to say, the layout area 14 defined by the anode gas port 11, the cathode gas port 12 and the coolant port 13 is in a "concave" shape open toward the reaction area 30. The above-mentioned "edge of the layout area 14 close to the reaction area 30" means that, in the length direction of the bipolar plate structure 100, the line connecting the end point of the anode gas port 11 close to the reaction area 30 and the end point of the cathode gas port 12 close to the reaction area 30 constitutes the boundary line of the layout area 14 adjacent to the reaction area 30, and the edge of the distribution area 20 on the side close to the reaction area 30 does not exceed the boundary line, that is, the distribution area 20 is completely located within the layout area 14. Therefore, the distribution area 20 can make full use of the space of the layout area 14 defined by the anode gas port 11, the cathode gas port 12 and the coolant port 13, so that the space occupied by the anode gas port 11, the cathode gas port 12 and the coolant port 13 and the distribution area 20 on the same side can be reduced in the length direction of the bipolar plate structure 100, so that the reaction area 30 can have a larger area for reaction, the area utilization rate on the bipolar plate structure 100 is high, and it is beneficial to improve the performance and power density of the fuel cell.

[0033] According to some embodiments of the present invention, the side of the anode gas port 11 adjacent to the layout area 14 is a first side 111, and the side of the cathode gas port 12 adjacent to the layout area 14 is a second side 121. The first side 111 and the second side 121 extend obliquely away from each other in a direction toward the reaction area 30. In other words, in the width direction of the bipolar plate structure 100, the edge of the layout area 14 near the anode gas port 11 and the edge of the layout area 14 near the cathode gas port 12 move away from each other in a direction toward the reaction area 30, thereby creating a flared structure in which the layout area 14 gradually opens toward the reaction area 30.

[0034] Therefore, the end of the arrangement area 14 close to the reaction area 30 can have a larger size in the width direction of the bipolar plate structure 100, which is convenient for the arrangement of the distribution area 20, so that in the width direction of the dual-substrate structure, the end of the distribution area 20 close to the reaction area 30 can have the same width size as the reaction area 30, so that the distribution area 20 can better cover the reaction area 30, such as ensuring that the distribution area 20 on one side can distribute the gas or liquid evenly to the reaction area 30, while ensuring that the reaction area 30 on the other side can cover the gas or liquid discharged from the receiving reaction area 30, so as to improve the uniformity of the distribution of gas and liquid in the reaction area 30.

[0035] Furthermore, it is understood that the anode gas enters the distribution area 20 from the anode gas port 11 at the first side 111, or enters the anode gas port 11 from the distribution area 20, and the cathode gas enters the distribution area 20 from the cathode gas port 12 at the second side 121, or enters the cathode gas port 12 from the batch area. Therefore, by setting the first side 111 and the second side 121 as beveled edges, the lengths of the first side 111 and the second side 121 can be increased, thereby providing a larger flow area for the inflow and outflow of the anode gas and the cathode gas, thereby improving the uniformity of the anode gas and the cathode gas entering the distribution area 20, and reducing the pressure loss of the anode gas between the anode gas port 11 and the distribution area 20, and the pressure loss of the cathode gas between the cathode gas port 12 and the distribution area 20. At the same time, the inclined first side 111 and the second side 121 reduce the deflection angle of the gas and liquid in the distribution area 20 when entering the reaction area 30, as well as the deflection angle of the gas and liquid in the reaction area 30 when entering the distribution area 20, thereby reducing the resistance to the flow of gas and liquid in the bipolar plate structure 100.

[0036] According to some embodiments of the present invention, the anode gas port 11 is formed at the angle between the wide side and one of the long sides of the bipolar plate structure 100, and the cathode gas port 12 is formed at the angle between the wide side and the other long side of the bipolar plate structure 100. The projections of the anode gas port 11 and the cathode gas port 12 on a reference plane are both triangular, and the reference plane is perpendicular to the thickness direction of the bipolar plate structure 100. The wide side here refers to the wide side on the same side of the bipolar plate structure 100 in the longitudinal direction. In other words, the anode gas port 11 and the cathode gas port 12 are respectively formed in two corner regions at one end of the bipolar plate structure 100 in the longitudinal direction. Furthermore, because the projections of the anode gas port 11 and the cathode gas port 12 on the reference plane are both triangular, the anode gas port 11 and the cathode gas port 12 can be smaller, thereby defining a larger layout area 14, facilitating the layout of the distribution area 20.

[0037] According to some embodiments of the present invention, the anode gas port 11 includes a first right-angled side 112, a second right-angled side 113 and a first side 111, and the cathode gas port 12 includes a third right-angled side 122, a fourth right-angled side 123 and a second side 121. The first right-angled side 112 is perpendicular to the second right-angled side 113, and the third right-angled side 122 is perpendicular to the fourth right-angled side 123. The first right-angled side 112 and the third right-angled side 122 extend along the length direction of the bipolar plate structure 100, and the second right-angled side 113 and the fourth right-angled side 123 extend along the width direction of the bipolar plate structure 100.

[0038] That is to say, the first right-angled side 112, the second right-angled side 113 and the first side 111 are connected end to end in sequence to form the anode gas port 11, the third right-angled side 122, the fourth right-angled side 123 and the second side 121 are connected end to end in sequence to form the cathode gas port 12, the parts of the wide side of the bipolar plate structure 100 close to the long sides on both sides constitute the second right-angled side 113 and the fourth right-angled side 123 respectively, and the parts of the long sides on both sides of the bipolar plate structure 100 close to the upper wide side constitute the first right-angled side 112 and the third right-angled side 122 respectively, and the two ends of the first side 111 and the second side 121 are respectively connected to the width and the long side of the corresponding side. It can be understood that, on the basis of the fixed dimensions of the anode gas port 11 in the width direction and the length direction of the bipolar plate structure 100, that is, on the basis of the fixed dimensions of the first right-angled side 112 and the second right-angled side 113, the length of the line segment passing through the end away from each other of the first right-angled side 112 and the second right-angled side 113 is the longest. Similarly, the length of the line segment passing through the end away from each other of the third right-angled side 122 and the fourth right-angled side 123 is the longest.

[0039] Therefore, the lengths of the first side 111 and the second side 121 can be increased, thereby providing a larger flow channel for the anode gas in the direction of the first side 111 and a larger flow channel for the cathode gas in the direction of the second side 121, thereby reducing the pressure loss during the inflow and outflow of the anode and cathode gases. Furthermore, while ensuring that the anode and cathode gas ports 11 and 12 are triangular, the space at the two corners on the wide side of the bipolar plate structure 100 can be fully utilized to increase the area of ​​the anode and cathode gas ports 11 and 12, thereby increasing the flow of the anode and cathode gases.

[0040] According to some embodiments of the present invention, both the first side 111 and the second side 121 are formed into an arc shape. It is understood that the two ends of the first side 111 are respectively connected to the mutually distal endpoints of the first right-angled side 112 and the second right-angled side 113, and the two ends of the second side 121 are respectively connected to the mutually distal endpoints of the third right-angled side 122 and the fourth right-angled side 123. When the distance between the mutually distal endpoints of the first right-angled side 112 and the second right-angled side 113 and the distance between the mutually distal endpoints of the third right-angled side 122 and the fourth right-angled side 123 remain unchanged, the first side 111 and the second side 121 are formed into an arc shape, which can increase the length of the first side 111 and the second side 121. This allows for a larger flow channel for the anode gas in the direction of the first side 111 and a larger flow channel for the cathode gas in the direction of the second side 121. This can reduce the pressure loss of the anode gas and the cathode gas during the inflow and outflow processes, while improving the uniformity of the distribution of the anode gas and the cathode gas.

[0041] It should be noted that the first side 111 and the second side 121 may be arc-shaped and convex toward the distribution area 20 , or may be arc-shaped and convex toward a direction away from the distribution area 20 , and there is no specific limitation here.

[0042] According to some embodiments of the present invention, the two anode gas ports 11 are respectively an anode gas inlet 11a and an anode gas outlet 11b, the two cathode gas ports 12 are respectively a cathode gas inlet 12a and a cathode gas outlet 12b, the two coolant ports 13 are respectively a coolant inlet 13a and a coolant outlet 13b, the two layout areas 14 are respectively a first layout area and a second layout area, the two distribution areas 20 are respectively a first distribution area and a second distribution area, the anode gas inlet 11a, the cathode gas outlet 12b and the coolant inlet 13a jointly define the first layout area, and the first distribution area is located in the first layout area, the anode gas outlet 11b, the cathode gas inlet 12a and the coolant outlet 13b jointly define the second layout area, and the second distribution area is located in the second layout area.

[0043] Therefore, in the length direction of the bipolar plate structure 100, the anode gas inlet 11a, the cathode gas outlet 12b and the coolant inlet 13a can share the same area on one side of the reaction area 30 with the first distribution area, and the anode gas outlet 11b, the cathode gas inlet 12a and the coolant outlet 13b can share the same area on the other side of the reaction area 30 with the second distribution area, thereby reducing the area occupied by the structures on both sides of the reaction area 30 to increase the area of ​​the reaction area 30.

[0044] Specifically, the bipolar plate structure 100 includes an anode plate and a cathode plate, the reaction area 30 includes an anode reaction area formed on the side of the anode plate facing away from the cathode plate, a cathode reaction area formed on the side of the cathode plate facing away from the anode plate, and a cooling area located between the anode plate and the cathode plate, the first distribution area includes an anode gas inlet distribution area formed on the side of the anode plate facing away from the cathode plate, a cathode gas outlet distribution area formed on the side of the cathode plate facing away from the anode plate, and a coolant outlet distribution area located between the anode plate and the cathode plate, the anode gas inlet distribution area, the cathode gas outlet distribution area, and the coolant outlet distribution area They are all located in the first arrangement area jointly defined by the anode gas inlet 11a, the cathode gas outlet 12b and the coolant outlet 13b; the second distribution area includes the anode gas outlet distribution area formed on the side of the anode plate facing away from the cathode plate, the cathode gas inlet distribution area formed on the side of the cathode plate facing away from the anode plate, and the coolant inlet distribution area located between the anode plate and the cathode plate. The anode gas outlet distribution area, the cathode gas inlet distribution area and the coolant inlet distribution area are all located in the second arrangement area jointly defined by the anode gas outlet 11b, the cathode gas inlet 12a and the coolant inlet 13a.

[0045] Specifically, the anode gas inlet 11a, the anode gas inlet distribution area, the anode reaction area, the anode gas outlet distribution area and the anode gas outlet 11b are connected in sequence to form an anode gas flow channel, so that the fuel gas such as hydrogen can flow along the anode gas to participate in the reaction of the fuel cell; the cathode gas inlet 12a, the cathode gas inlet distribution area, the cathode reaction area, the cathode gas outlet distribution area and the cathode gas outlet 12b are connected in sequence to form a cathode gas flow channel, so that the oxidant gas such as oxygen can flow along the imprinted gas flow channel to participate in the reaction of the fuel cell, and the coolant inlet 13a, the coolant inlet distribution area, the cooling area, the coolant outlet distribution area and the coolant outlet 13b are connected in sequence to form a coolant flow channel, so that the coolant can flow along the coolant flow channel to cool the bipolar plate structure 100.

[0046] According to some embodiments of the present invention, the projection of the coolant port 13 on the reference plane is triangular, and the three sides of the coolant port 13 are respectively a third side 131, a fourth side 132 and a fifth side 133 connected end to end in sequence. The first side 111, the second side 121, the third side 131 and the fourth side 132 jointly define the arrangement area 14, and the fifth side 133 extends along the width direction of the bipolar plate structure 100. That is to say, the third side 131 and the fourth side 132 of the cooling liquid port 13 are adjacent to the distribution area 20. Therefore, the communication channel between the cooling liquid and the distribution area 20 can be set along the third side 131 and the fourth side 132. Moreover, since the sum of any two sides of the triangle is greater than the length of the third side, that is, the length of the third side 131 and the fourth side 132 is greater than the length of the fifth side 133, the communication position and area between the cooling liquid port 13 and the distribution area 20 can be better increased, the pressure loss of the cooling liquid flow can be reduced, and the flow rate of the cooling liquid in the bipolar plate structure 100 can be increased, so as to enhance the cooling effect of the cooling liquid on the bipolar plate structure 100.

[0047] Furthermore, the effective flow length of the arrangement area 14 defined by the first side 111, the second side 121, the third side 131, and the fourth side 132 is longer. Specifically, the sum of the lengths of the first side 111, the second side 121, the third side 131, and the fourth side 132 is greater than the width of the bipolar plate structure 100. This provides more space for the gas and coolant flow channels, facilitates uniform distribution of the gas and coolant, and reduces pressure loss during the flow of the gas and coolant. In one specific example, the sum of the lengths of the first side 111, the second side 121, the third side 131, and the fourth side 132 is 1.3 times that of the bipolar plate structure 100.

[0048] According to some embodiments of the present invention, the angle between the third side 131 and the fourth side 132 is an obtuse angle. It is understood that when the length of the fifth side 133 is fixed, if the angle between the third side 131 and the fourth side 132 is too small, the coolant port 13 occupies more space along the length of the bipolar plate structure 100, and the space reserved for the distribution area 20 is reduced. Therefore, by setting the angle between the third side 131 and the fourth side 132 to an obtuse angle, the flow area between the coolant port 13 and the distribution area 20 is increased while ensuring that the distribution area 20 has sufficient space for installation, thereby avoiding pressure loss caused by excessive flow channel deflection angles or excessive deflection times in the distribution area 20.

[0049] A fuel cell according to an embodiment of the second aspect of the present invention will be described below with reference to the accompanying drawings.

[0050] The fuel cell according to the second embodiment of the present invention includes: the above-mentioned bipolar plate structure 100 .

[0051] According to the fuel cell of the embodiment of the second aspect of the present invention, the inlet and outlet areas 10 and the distribution area 20 on the corresponding side share the same area of ​​the bipolar plate structure 100 in the length direction. In the length direction of the bipolar plate structure 100, the space occupied by the inlet and outlet areas 10 and the distribution area 20 on the same side can be reduced, so that a larger setting space can be reserved for the reaction area 30, so as to increase the area ratio of the reaction area 30 occupied by the bipolar plate structure 100, which is beneficial to improving the performance and power density of the fuel cell.

[0052] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bipolar plate structure, characterized in that: The bipolar plate structure is formed with inlet and outlet areas and distribution areas at both ends in the length direction, and a reaction area is formed between the distribution areas on both sides. The inlet and outlet areas and the distribution areas on the corresponding sides share the same area of ​​the bipolar plate structure in the length direction.

2. The bipolar plate structure according to claim 1, characterized in that: The inlet and outlet areas are formed with an anode gas port, a cathode gas port and a coolant port. The coolant port is located between the anode gas and cathode gas ports in the width direction of the bipolar plate structure. In the length direction of the bipolar plate structure, the distance between the coolant port and the reaction area is greater than the distance between the anode gas port and the cathode gas port and the reaction area. The anode gas port, the cathode gas port and the coolant port jointly define an arrangement area in which the distribution area is arranged. An end of the distribution area close to the reaction area does not exceed an edge of the arrangement area close to the reaction area.

3. The bipolar plate structure according to claim 2, characterized in that: The side of the anode gas port adjacent to the arrangement area is a first side, and the side of the cathode gas port adjacent to the arrangement area is a second side. In the direction toward the reaction area, the first side and the second side extend obliquely away from each other.

4. The bipolar plate structure according to claim 3, characterized in that: The anode gas port is formed at the angle between the wide side of the bipolar plate structure and one of the long sides, and the cathode gas port is formed at the angle between the wide side of the bipolar plate structure and the other long side. The projections of the anode gas port and the cathode gas port on the reference plane are both triangular, and the reference plane is perpendicular to the thickness direction of the bipolar plate structure.

5. The bipolar plate structure according to claim 4, characterized in that: The anode gas port includes a first right-angled side, a second right-angled side and the first side, and the cathode gas port includes a third right-angled side, a fourth right-angled side and the second side, the first right-angled side is perpendicular to the second right-angled side, the third right-angled side is perpendicular to the fourth right-angled side, the first right-angled side and the third right-angled side extend along the length direction of the bipolar plate structure, and the second right-angled side and the fourth right-angled side extend along the width direction of the bipolar plate structure.

6. The bipolar plate structure according to claim 3, characterized in that: The first side and the second side are both formed in an arc shape.

7. The bipolar plate structure according to claim 2, characterized in that: The two anode gas ports are respectively an anode gas inlet and an anode gas outlet, the two cathode gas ports are respectively a cathode gas inlet and a cathode gas outlet, the two coolant ports are respectively a coolant inlet and a coolant outlet, the two layout areas are respectively a first layout area and a second layout area, the two distribution areas are respectively a first distribution area and a second distribution area, the anode gas inlet, the cathode gas outlet and the coolant inlet jointly define the first layout area, and the first distribution area is located in the first layout area, the anode gas outlet, the cathode gas inlet and the coolant outlet jointly define the second layout area, and the second distribution area is located in the second layout area.

8. The bipolar plate structure according to claim 3, characterized in that: The projection of the coolant port on the reference surface is triangular, and the three sides of the coolant port are a third side, a fourth side and a fifth side connected end to end in sequence. The first side, the second side, the third side and the fourth side jointly define the layout area, and the fifth side extends along the width direction of the bipolar plate structure.

9. The bipolar plate structure according to claim 8, characterized in that: An angle between the third side and the fourth side is an obtuse angle.

10. A fuel cell, characterized in that: include: The bipolar plate structure according to any one of claims 1 to 9.

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