Bipolar plate structure and fuel cell

Abstract

The utility model discloses a bipolar plate structure and a fuel cell. The bipolar plate structure comprises a first polar plate and a second polar plate, the first polar plate is provided with a first flow field area, and the first flow field area is provided with a plurality of first gas flow channels; the second polar plate is provided with a second flow field area, the second flow field area is provided with a plurality of second gas flow channels, a sealing cavity is defined between the first flow field area and the second flow field area, the first gas flow channels are located on the side, away from the sealing cavity, of the first polar plate, and the second flow field area is located on the side, away from the sealing cavity, of the second gas flow channels; wherein the two edges, extending in the first direction, of the flow field area are each provided with a plurality of turbulent flow protrusions, so that gas turbulent flow channels and liquid turbulent flow channels are defined among the multiple turbulent flow protrusions, the gas turbulent flow channels are located on the sides, away from the sealing cavity, of the polar plates, and the liquid turbulent flow channels communicate with the sealing cavity. The bipolar plate structure can improve the reaction efficiency of the fuel cell.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a bipolar plate structure and a fuel cell. Background Art

[0002] The bipolar plate structure of a fuel cell is generally composed of several areas, such as a sealing area and a flow field area. Among them, the flow field area is the reaction area of ​​the bipolar plate structure. In traditional bipolar plates, at the edge of the flow field area (that is, the junction of the flow field area and the sealing area), the gas or coolant flows out of the bipolar plate without passing through the core reaction area of ​​the flow field area. This will cause the gas to be unable to diffuse into the core reaction area of ​​the flow field area for reaction, resulting in insufficient gas reaction, and then reducing the reaction efficiency of the fuel cell. At the same time, it will also cause less coolant to enter the core reaction area, resulting in the inability to timely remove the heat energy generated by the electrochemical reaction, thereby reducing the reaction efficiency of the fuel cell. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide a bipolar plate structure that can improve the reaction efficiency of fuel cells.

[0004] The present application also provides a fuel cell.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] According to an embodiment of the first aspect of the present application, a bipolar plate structure includes: a first electrode plate, the first electrode plate having a first flow field area, the first flow field area having a plurality of first gas flow channels extending along a first direction; a second electrode plate, the second electrode plate having a second flow field area, the second flow field area having a plurality of second gas flow channels extending along the first direction, an edge of the first electrode plate corresponding to the first flow field area and an edge of the second electrode plate corresponding to the second flow field area being sealed to define a sealed cavity between the first flow field area and the second flow field area, the first gas flow channel being located on a side of the first electrode plate away from the sealed cavity, and the second flow field area being located on a side of the second gas flow channel away from the sealed cavity; wherein, a plurality of flow-disturbing protrusions facing away from the sealed cavity are provided at both edges of the flow field area extending along the first direction, each flow-disturbing protrusion extending along the second direction to define a gas flow-disturbing flow channel and a liquid flow-disturbing flow channel between the plurality of flow-disturbing protrusions, the gas flow-disturbing flow channel being located on a side of the electrode plate away from the sealed cavity, the liquid flow-disturbing flow channel being connected to the sealed cavity, and the first direction and the second direction being arranged at an angle.

[0007] The bipolar plate structure of the present application has the following advantages:

[0008] In the bipolar plate structure of the present application, the connection between the first electrode plate and the second electrode plate is achieved by sealing the edge of the first electrode plate corresponding to the first flow field area with the edge of the second electrode plate corresponding to the second flow field area to form a bipolar plate structure. At the same time, a sealed cavity can be formed between the first flow field area and the second flow field area for coolant to flow through. The coolant can cool the first flow field area and the second flow field area to take away the heat of the first flow field area and the second flow field area, thereby improving the service life of the fuel cell. Since the two edges of the flow field area extending along the first direction are provided with gas turbulence channels, when the gas flows through the edge of the flow field area, the gas can be disturbed by the gas bypass channel to The flow path of the gas at the edge of the flow field area is extended, and the speed of the gas flowing at the edge of the flow field area along the first direction is reduced, so that the gas at the edge of the flow field area can diffuse more to the middle of the flow field area, thereby improving the reaction efficiency of the fuel cell. At the same time, since the two edges extending in the first direction of the sealed cavity are provided with liquid turbulence flow channels, when the coolant flows through the edge of the sealed cavity, the liquid can be disturbed by the coolant bypass channel to extend the flow path of the coolant at the edge of the sealed cavity and reduce the speed of the coolant flowing at the edge of the sealed cavity along the first direction, the cooling effect on the edge of the flow field area can be improved, thereby further improving the reaction efficiency of the fuel cell.

[0009] According to the bipolar plate structure of the embodiment of the first aspect of the present application, a plurality of first protrusions extending along the first direction and spaced apart along the second direction are provided on the first polar plate, and each of the first protrusions protrudes in a direction away from the second polar plate to define a plurality of first gas flow channels extending along the first direction between the plurality of first protrusions, and each of the first gas flow channels is located within the first flow field area.

[0010] According to the bipolar plate structure of the embodiment of the first aspect of the present application, a plurality of second protrusions extending along the first direction and spaced apart along the second direction are provided on the second polar plate, and each of the second protrusions protrudes in a direction away from the first polar plate to define a plurality of second gas flow channels extending along the first direction between the plurality of second protrusions, and each of the second gas flow channels is located within the second flow field area.

[0011] According to the bipolar plate structure of the embodiment of the first aspect of the present application, the side of each first protrusion close to the second pole plate is spaced apart from the side of a second protrusion close to the first pole plate, so as to define a liquid flow channel extending along the first direction between the first protrusion and the second protrusion, and the side of each first gas flow channel close to the second pole plate is fitted with the side of a second gas flow channel close to the first pole plate, so that any two adjacent liquid flow channels are spaced apart, and each liquid flow channel is part of the sealed cavity.

[0012] According to the bipolar plate structure of the embodiment of the first aspect of the present application, the first protrusion and the second protrusion are both extended in a broken line shape along the first direction.

[0013] According to the bipolar plate structure of the embodiment of the first aspect of the present application, the zigzag-line protrusion has multiple zigzag-line periods, each of the zigzag-line periods corresponds to multiple spoiler protrusions arranged at intervals along the first direction, and in the second direction, the length of the spoiler protrusion located at the edge of each zigzag-line period is smaller than the length of the spoiler protrusion located in the middle of each zigzag-line period.

[0014] According to the bipolar plate structure of the embodiment of the first aspect of the present application, the first protrusion and the second protrusion are both extended in a straight line along the first direction.

[0015] According to the bipolar plate structure of the embodiment of the first aspect of the present application, the plurality of spoiler protrusions are arranged at intervals along the first direction, and the length of each of the spoiler protrusions along the second direction is equal.

[0016] According to the bipolar plate structure of the embodiment of the first aspect of the present application, on the first electrode plate, one end of each of the flow-disturbing protrusions along the second direction is connected to the first protrusion at the outermost edge, and the recesses between any two of the flow-disturbing protrusions are connected to form the gas flow-disturbing channel;

[0017] On the second electrode plate, one end of each of the flow-disturbing protrusions along the second direction is connected to the second protrusion at the outermost edge, and the recesses between any two of the flow-disturbing protrusions are connected to form the gas flow-disturbing channel;

[0018] The side of the flow-disturbing protrusion on the first electrode plate close to the second electrode plate is connected to the side of the flow-disturbing protrusion on the second electrode plate close to the first electrode plate to form the liquid flow-disturbing channel.

[0019] A fuel cell according to an embodiment of the second aspect of the present application includes: the bipolar plate structure as described above.

[0020] The fuel cell of the present application has the following advantages:

[0021] In the fuel cell of the present application, since the bipolar plate structure of the present application can improve the reaction efficiency of the fuel cell, the fuel cell of the present application can have a higher reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The schematic diagram of the bipolar plate structure of Example 1 of the present application is shown Figure 1 ;

[0024] Figure 2 Shown Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 3 Shown Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 4 The schematic diagram of the bipolar plate structure of Example 1 of the present application is shown Figure 2 ;

[0027] Figure 5 Shown Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 6 Shown Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0029] Figure 7 A schematic cross-sectional view of the bipolar plate structure of Example 1 of the present application is shown;

[0030] Figure 8 Shown Figure 7 Schematic diagram of the enlarged structure at E in the middle.

[0031] Description of main component symbols:

[0032] 100 - first electrode plate; 110 - first flow field area; 111 - first gas flow channel; 112 - first gas inlet; 113 - first gas distribution channel; 114 - first gas outlet; 120 - first protrusion;

[0033] 200 - second electrode plate; 210 - second flow field area; 211 - second gas flow channel; 212 - second gas inlet; 213 - second gas distribution channel; 214 - second gas outlet; 220 - second protrusion;

[0034] 300-sealed cavity; 310-liquid flow channel;

[0035] 400- flow-disturbing protrusion; 410- gas flow-disturbing channel; 420- liquid flow-disturbing channel. DETAILED DESCRIPTION

[0036] The following describes in detail embodiments of the present application. 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 only used to explain the present application and are not to be construed as limiting the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0040] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] Reference Figure 1 、 Figure 4 、 Figure 7 as well as Figure 8 As shown, the bipolar plate structure involved in the embodiment of the present application includes: a first electrode plate 100 and a second electrode plate 200.

[0042] Specifically, the first electrode plate 100 is provided with a first flow field area 110, and the first flow field area 110 is provided with a plurality of first gas flow channels 111 extending along the first direction; the second electrode plate 200 is provided with a second flow field area 210, and the second flow field area 210 is provided with a plurality of second gas flow channels 211 extending along the first direction, and the edge of the first electrode plate 100 corresponding to the first flow field area 110 is sealed to the edge of the second electrode plate 200 corresponding to the second flow field area 210 to define a sealed cavity 300 between the first flow field area 110 and the second flow field area 210, and the first gas flow channels 111 are located in the first flow field area 110. The electrode 100 is on a side away from the sealed cavity 300, and the second flow field area 210 is located on a side of the second gas flow channel 211 away from the sealed cavity 300; wherein, a plurality of flow spoiler protrusions 400 protruding toward and away from the sealed cavity 300 are provided at the two edges of the flow field area extending along the first direction, and each flow spoiler protrusion 400 is extended along the second direction to define a gas flow spoiler channel 410 and a liquid flow spoiler channel 420 between the plurality of flow spoiler protrusions 400, the gas flow spoiler channel 410 is located on the side of the electrode away from the sealed cavity 300, and the liquid flow spoiler channel 420 is connected to the sealed cavity 300.

[0043] It should be noted that the first electrode plate 100 is a cathode plate, hydrogen flows through the first gas flow channel 111 of the first flow field area 110, the second electrode plate 200 is an anode plate, and oxygen flows through the second gas flow channel 211 of the second flow field area 210. In the fuel cell, multiple bipolar plate structures are stacked, and there is a diaphragm between any two bipolar plate structures. In this way, the hydrogen and oxygen of any adjacent bipolar plate structures pass through the diaphragm to form a current loop, thereby realizing power generation of the fuel cell. In this process, both the first flow field area 110 and the second flow field area 210 will generate heat.

[0044] It should be noted that the first direction is Figure 1The direction indicated by x is the length direction of the bipolar plate structure, and the second direction is Figure 1 The direction indicated by y is the width direction of the bipolar plate structure.

[0045] In the bipolar plate structure of the present application, the edge of the first electrode 100 corresponding to the first flow field area 110 is sealed with the edge of the second electrode 200 corresponding to the second flow field area 210 to achieve the connection between the first electrode 100 and the second electrode 200 to form a bipolar plate structure. At the same time, a sealed cavity 300 can be formed between the first flow field area 110 and the second flow field area 210 for the coolant to flow through. The coolant can cool the first flow field area 110 and the second flow field area 210 to take away the heat of the first flow field area 110 and the second flow field area 210, thereby improving the service life of the fuel cell. Since the two edges of the flow field area extending along the first direction are provided with gas turbulence channels, when the gas flows through the edge of the flow field area, it can be bypassed by the gas. The flow channel disturbs the gas to extend the flow path of the gas at the edge of the flow field area and reduce the speed of the gas flowing in the first direction at the edge of the flow field area, so that the gas at the edge of the flow field area can diffuse more to the middle of the flow field area, thereby improving the reaction efficiency of the fuel cell. At the same time, since the two edges extending in the first direction of the sealed cavity 300 are provided with liquid disturbance flow channels 420, when the coolant flows through the edge of the sealed cavity 300, the liquid can be disturbed by the coolant bypass channel to extend the flow path of the coolant at the edge of the sealed cavity 300 and reduce the speed of the coolant flowing in the first direction at the edge of the sealed cavity 300, thereby improving the cooling effect on the edge of the flow field area, thereby further improving the reaction efficiency of the fuel cell.

[0046] Reference Figure 2 、 Figure 3 as well as Figure 8 As shown, a plurality of first protrusions 120 extending along the first direction and spaced apart along the second direction are provided on the first electrode plate 100, and each first protrusion 120 protrudes in a direction away from the second electrode plate 200 to define a plurality of first gas flow channels 111 extending along the first direction between the plurality of first protrusions 120, and each first gas flow channel 111 is located in the first flow field area 110.

[0047] In this embodiment, since the first electrode plate 100 is provided with a plurality of first protrusions 120 extending along the first direction and spaced apart along the second direction, each first protrusion 120 protrudes in a direction away from the second electrode plate 200. In this way, a groove extending along the first direction can be defined between any two first protrusions 120, and the opening of the groove is set toward the side away from the sealed cavity 300. The groove is the first gas flow channel 111, and hydrogen can flow through the first flow field area 110 in the plurality of first gas flow channels 111. In this way, the flow of hydrogen can be guided by the plurality of first gas flow channels 111, so that hydrogen can flow from one side of the first flow field area 110 to the other side of the first flow field area 110, so that hydrogen can fully react with oxygen on the second electrode plate 200 to improve the reaction efficiency of the fuel cell.

[0048] Reference Figure 5 、 Figure 6 as well as Figure 8 As shown, the second electrode plate 200 is provided with a plurality of second protrusions 220 extending along the first direction and spaced apart along the second direction, each second protrusion 220 protrudes in a direction away from the first electrode plate 100 to define a plurality of second gas flow channels 211 extending along the first direction between the plurality of second protrusions 220, and each second gas flow channel 211 is located in the second flow field area 210.

[0049] In this embodiment, since the second electrode plate 200 is provided with a plurality of second protrusions 220 extending along the first direction and spaced apart along the second direction, each second protrusion 220 protrudes in a direction away from the second electrode plate 200. In this way, a groove extending along the first direction can be defined between any two second protrusions 220, and the opening of the groove is set toward the side away from the sealed cavity 300. The groove is the second gas flow channel 211, and oxygen can flow through the second flow field area 210 in the plurality of second gas flow channels 211. In this way, the flow of oxygen can be guided by the plurality of second gas flow channels 211, so that oxygen can flow from one side of the second flow field area 210 to the other side of the second flow field area 210, so that oxygen can fully react with the hydrogen on the first electrode plate 100 to improve the reaction efficiency of the fuel cell.

[0050] Reference Figure 8As shown, the side of each first protrusion 120 close to the second electrode plate 200 is spaced apart from the side of a second protrusion 220 close to the first electrode plate 100, so as to define a liquid flow channel 310 extending along the first direction between the first protrusion 120 and the second protrusion 220, and the side of each first gas flow channel 111 close to the second electrode plate 200 is fitted with the side of a second gas flow channel 211 close to the first electrode plate 100, so that any two adjacent liquid flow channels 310 are spaced apart, and each liquid flow channel 310 is a part of the sealed cavity 300.

[0051] In this embodiment, since the side of each first protrusion 120 close to the second electrode plate 200 is spaced apart from the side of a second protrusion 220 close to the first electrode plate 100, a liquid flow channel 310 extending along the first direction can be defined between the first protrusion 120 and the second protrusion 220, so that the coolant can flow along the first direction in the liquid flow channel 310. Since the side of each first gas flow channel 111 close to the second electrode plate 200 is aligned with the side of a second gas flow channel 211 close to the first electrode plate 100, any two adjacent liquid flow channels 310 can be spaced apart, so that the coolant flowing through the sealed cavity 300 can be distributed to various parts of the sealed cavity 300 by the multiple spaced liquid flow channels 310, so that coolant can flow through various parts of the first flow field area 110 and the second flow field area 210, thereby improving the cooling effect on the first flow field area 110 and the second flow field area 210, thereby further improving the reaction efficiency of the fuel cell.

[0052] Example 1

[0053] Reference Figure 2 as well as Figure 5 As shown, in embodiment 1, the first protrusion 120 and the second protrusion 220 are both extended in a broken line shape along the first direction.

[0054] In this embodiment, since the first protrusion 120 and the second protrusion 220 are both arranged to extend in a broken line shape along the first direction, the flow path of the gas in the first gas flow channel 111 and the second gas flow channel 211 can be extended, thereby reducing the flow velocity of the gas in the first gas flow channel 111 and the second gas flow channel 211, so that the hydrogen and oxygen between any two adjacent bipolar plate structures can react more fully, thereby improving the reaction efficiency of the fuel cell. Similarly, the flow path of the coolant in the liquid flow channel 310 can also be extended, thereby reducing the flow velocity of the coolant in the liquid flow channel 310, thereby improving the cooling effect on the first flow field area 110 and the second flow field area 210, and further improving the reaction efficiency of the fuel cell.

[0055] Continue to refer to Figure 2 as well as Figure 5 As shown, in Example 1, the broken line protrusion has multiple broken line periods, each broken line period corresponds to a plurality of spoiler protrusions 400 arranged at intervals along the first direction, and in the second direction, the length of the spoiler protrusion 400 located at the edge of each broken line period is less than the length of the spoiler protrusion 400 located in the middle of each broken line period.

[0056] Specifically, in this embodiment, each fold line period is composed of two straight protrusions set at an angle. Within each fold line period, the two edge endpoints of the fold line period are set close to the interior of the flow field area along the second direction, and the middle endpoint of the fold line period is set away from the interior of the flow field area along the second direction.

[0057] In this embodiment, in the second direction, since the length of the spoiler protrusion 400 located at the edge of each fold line period is smaller than the length of the spoiler protrusion 400 located in the middle of each fold line period, the spoiler protrusion 400 located in the middle of the fold line period can cause greater disturbance to the gas flow, thereby enhancing the ability of the gas flowing through the middle of the fold line period to diffuse into the flow field area, so that the gas flowing through the edge of the flow field area can diffuse into the flow field area, so that the core reaction area of ​​the flow field area has more reaction gas, thereby improving the utilization rate of the reaction gas, thereby improving the reaction efficiency of the fuel cell.

[0058] Example 2

[0059] In the second embodiment, the first protrusion 120 and the second protrusion 220 are both extended linearly along the first direction.

[0060] In this embodiment, since the first protrusion 120 and the second protrusion 220 are both arranged to extend linearly along the first direction, when the bipolar plate is stamped, the stamping mold manufacturing process of the bipolar plate can be simplified, and the stamping accuracy of the bipolar plate can be improved, thereby improving the product yield of the bipolar plate.

[0061] In embodiment 2, a plurality of spoiler protrusions 400 are arranged at intervals along the first direction, and the length of each spoiler protrusion 400 along the second direction is equal.

[0062] In this embodiment, since the first protrusion 120 and the second protrusion 220 are both extended in a straight line along the first direction, it is only necessary for each spoiler protrusion 400 to have the same length along the second direction, so that the gas flowing through the edge of the flow field area can be disturbed by the spoiler protrusion 400, so that the gas at the edge of the flow field area can diffuse into the interior of the flow field area, so that the core reaction area of ​​the flow field area has more reaction gas, thereby improving the utilization rate of the reaction gas, thereby improving the reaction efficiency of the fuel cell. At the same time, it can reduce the difficulty of making the spoiler protrusion 400, and improve the production efficiency and product yield of the bipolar plate.

[0063] Reference Figure 8 As shown, on the basis of Example 1 and Example 2, on the first electrode 100, one end of each spoiler protrusion 400 along the second direction is connected to the first protrusion 120 at the outermost edge, and the recesses between any two spoiler protrusions 400 are connected to form a gas spoiler flow channel 410; on the second electrode 200, one end of each spoiler protrusion 400 along the second direction is connected to the second protrusion 220 at the outermost edge, and the recesses between any two spoiler protrusions 400 are connected to form a gas spoiler flow channel 410; the side of the spoiler protrusion 400 on the first electrode 100 close to the second electrode 200 is connected to the side of the spoiler protrusion 400 on the second electrode 200 close to the first electrode 100 to form a liquid spoiler flow channel 420.

[0064] Specifically, the liquid disrupting flow channel 420 is communicated with the liquid flow channel 310 at the outermost edge along the second direction.

[0065] In this embodiment, on the first electrode plate 100, since the recesses between any two flow-disturbing protrusions 400 are connected to form a gas flow-disturbing channel 410, a curved gas flow channel extending along the first direction can be formed by the plurality of flow-disturbing protrusions 400, so that the gas can flow in a non-linear state when flowing through the edge of the first flow field area 110, thereby achieving the purpose of disturbing the gas, so as to extend the flow path of the gas at the edge of the first flow field area 110, and reduce the gas in the first flow field area 110. The speed of the edge flowing along the first direction is increased, so that the gas at the edge of the first flow field area 110 can be more diffused to the middle of the flow field area. Similarly, on the second electrode 200, since the recesses between any two flow-disturbing protrusions 400 are connected to form a gas flow-disturbing channel 410, a curved gas flow channel extending along the first direction can be formed by multiple flow-disturbing protrusions 400, so that the gas can flow in a non-linear state when flowing through the edge of the second flow field area 210, thereby achieving the purpose of disturbing the gas. In order to extend the flow path of the gas at the edge of the second flow field area 210, reduce the speed of the gas flowing in the first direction at the edge of the second flow field area 210, so that the gas at the edge of the second flow field area 210 can diffuse more to the middle of the flow field area, thereby improving the reaction efficiency of the fuel cell; in addition, since the side of the spoiler protrusion 400 on the first electrode plate 100 close to the second electrode plate 200 is connected with the side of the spoiler protrusion 400 on the second electrode plate 200 close to the first electrode plate 100 to form a liquid spoiler flow channel 420, and the liquid spoiler flow channel 420 is connected with the liquid flow channel 310 at the edge along the second direction, the coolant can flow in a non-linear state in the liquid bypass flow channel, thereby achieving the purpose of disturbing the coolant, so as to extend the flow path of the coolant in the liquid flow channel 310 at the edge, reduce the speed of the coolant flowing in the liquid flow channel 310 at the edge along the first direction, and improve the cooling effect on the edge of the flow field area, thereby further improving the reaction efficiency of the fuel cell.

[0066] Specifically, refer to Figure 8 As shown, the first flow field area 110 is provided with a plurality of first air inlets 112 at the edge of one end along the first direction, and is also provided with a plurality of first distribution air channels 113. The first flow field area 110 is provided with a plurality of first air outlets 114 at the edge of the other end along the first direction. One end of each first distribution air channel 113 is connected to a first air inlet 112, and the other end of each first distribution air channel 113 is connected to one end of a first gas flow channel 111 along the first direction to distribute the gas to each first gas flow channel 111. The other end of the first gas flow channel 111 along the first direction is connected to a first air outlet 114 to realize the circulation of the gas in the first flow field area 110.

[0067] Specifically, refer to Figure 8 As shown, the second flow field area 210 is provided with a plurality of second air inlets 212 at the edge of one end along the first direction, and is also provided with a plurality of second distribution air channels 213. The second flow field area 210 is provided with a plurality of second air outlets 214 at the edge of the other end along the first direction. One end of each second distribution air channel 213 is connected to a second air inlet 212, and the other end of each second distribution air channel 213 is connected to one end of a second gas flow channel 211 along the first direction to distribute the gas to each second gas flow channel 211. The other end of the second gas flow channel 211 along the first direction is connected to a second air outlet 214 to realize the circulation of the gas in the second flow field area 210.

[0068] The fuel cell involved in the embodiments of the present application includes: the above-mentioned bipolar plate structure.

[0069] In the fuel cell of the present application, since the bipolar plate structure of the present application can improve the reaction efficiency of the fuel cell, the fuel cell of the present application can have a higher reaction efficiency.

[0070] 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 application. 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.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A bipolar plate structure, characterized in that: include: a first electrode plate, wherein the first electrode plate is provided with a first flow field region, wherein the first flow field region is provided with a plurality of first gas flow channels extending along a first direction; a second electrode plate, wherein the second electrode plate is provided with a second flow field region, and the second flow field region is provided with a plurality of second gas flow channels extending along the first direction, an edge of the first electrode plate corresponding to the first flow field region is sealedly connected to an edge of the second electrode plate corresponding to the second flow field region to define a sealed cavity between the first flow field region and the second flow field region, the first gas flow channel is located on a side of the first electrode plate away from the sealed cavity, and the second flow field region is located on a side of the second gas flow channel away from the sealed cavity; In which, a plurality of flow-disturbing protrusions facing away from the sealing cavity are provided at the two edges of the flow field area extending along the first direction, and each flow-disturbing protrusion is extended along the second direction to define a gas flow-disturbing flow channel and a liquid flow-disturbing flow channel between the plurality of flow-disturbing protrusions. The gas flow-disturbing flow channel is located on the side of the electrode away from the sealing cavity, and the liquid flow-disturbing flow channel is connected to the sealing cavity. The first direction and the second direction are set at an angle.

2. The bipolar plate structure according to claim 1, characterized in that: The first electrode plate is provided with a plurality of first protrusions extending along the first direction and spaced apart along the second direction, each of the first protrusions protruding in a direction away from the second electrode plate to define a plurality of first gas flow channels extending along the first direction between the plurality of first protrusions, and each of the first gas flow channels is located within the first flow field area.

3. The bipolar plate structure according to claim 2, characterized in that: The second electrode plate is provided with a plurality of second protrusions extending along the first direction and spaced apart along the second direction, each of the second protrusions protruding in a direction away from the first electrode plate to define a plurality of second gas flow channels extending along the first direction between the plurality of second protrusions, and each of the second gas flow channels is located in the second flow field area.

4. The bipolar plate structure according to claim 3, characterized in that: The side of each first protrusion close to the second electrode plate is spaced apart from the side of a second protrusion close to the first electrode plate, so as to define a liquid flow channel extending along the first direction between the first protrusion and the second protrusion, and the side of each first gas flow channel close to the second electrode plate is fitted with the side of a second gas flow channel close to the first electrode plate, so that any two adjacent liquid flow channels are spaced apart, and each liquid flow channel is part of the sealed cavity.

5. The bipolar plate structure according to claim 3, characterized in that: The first protrusion and the second protrusion are both extended in a broken line shape along the first direction.

6. The bipolar plate structure according to claim 5, characterized in that: The fold line-shaped protrusion has multiple fold line periods, each of the fold line periods corresponds to multiple spoiler protrusions arranged at intervals along the first direction, and in the second direction, the length of the spoiler protrusion located at the edge of each fold line period is smaller than the length of the spoiler protrusion located in the middle of each fold line period.

7. The bipolar plate structure according to claim 3, characterized in that: The first protrusion and the second protrusion are both extended linearly along the first direction.

8. The bipolar plate structure according to claim 7, characterized in that: The plurality of spoiler protrusions are arranged at intervals along the first direction, and the length of each spoiler protrusion along the second direction is equal.

9. The bipolar plate structure according to any one of claims 3 to 8, characterized in that: On the first electrode plate, one end of each of the flow-disturbing protrusions along the second direction is connected to the first protrusion at the outermost edge, and the recesses between any two of the flow-disturbing protrusions are connected to form the gas flow-disturbing channel; On the second electrode plate, one end of each of the flow-disturbing protrusions along the second direction is connected to the second protrusion at the outermost edge, and the recesses between any two of the flow-disturbing protrusions are connected to form the gas flow-disturbing channel; The side of the flow-disturbing protrusion on the first electrode plate close to the second electrode plate is connected to the side of the flow-disturbing protrusion on the second electrode plate close to the first electrode plate to form the liquid flow-disturbing channel.

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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