Fuel cell bipolar plate and fuel cell

Abstract

The invention relates to a fuel cell bipolar plate and a fuel cell. The fuel cell bipolar plate comprises a bipolar plate body. A plurality of ridge parts are distributed on the surface of the bipolar plate body and are arranged at intervals, any ridge part and the adjacent ridge part are provided with opposite side walls, an air flow channel is formed between the side walls of the adjacent ridge parts, and meanwhile, grooves are formed in the side walls, used for forming the air flow channels, of the ridge parts. And the gas flow channel formed between the side walls of the adjacent ridges can provide a circulation path for gas, so that the smoothness of transmission of substances in the fuel cell is ensured, and the electrochemical reaction can be continuously and efficiently carried out. The grooves formed in the side wall, used for forming the gas flow channel, of the ridge portion can increase the contact area between the gas flow and the side wall of the ridge portion, uniform distribution of reaction gas in the channel is promoted, and the utilization rate of the gas is increased.

Description

Technical Field

[0001] This application relates to the field of fuel cell technology, and in particular to a fuel cell bipolar plate and a fuel cell. Background Technology

[0002] With the development of fuel cell technology, bipolar plates, as the core component of fuel cells, undertake crucial functions such as separating fuel and oxidant, conducting current, distributing reactant gases, and dissipating heat. Their structural design directly affects the overall performance of the fuel cell. In related technologies, the ridges of fuel cell bipolar plates are typically designed with smooth sidewalls, forming airflow channels between adjacent ridges. However, this structure limits the effective flow area of ​​the airflow channels, resulting in high gas flow resistance and low transmission efficiency of reactant gases (especially air as the oxidant). This makes it difficult to meet the gas supply requirements of the electrochemical reaction, thus affecting the output performance and reaction efficiency of the fuel cell, becoming a prominent technical problem restricting the improvement of fuel cell performance. Summary of the Invention

[0003] Therefore, it is necessary to provide a fuel cell bipolar plate and a fuel cell to address the problem of high airflow resistance in fuel cell bipolar plates.

[0004] A fuel cell bipolar plate includes:

[0005] The bipolar plate body has several ridges arranged on its surface;

[0006] Several ridges are spaced apart, and each ridge has a corresponding sidewall to its adjacent ridge;

[0007] An airflow channel is formed between the sidewalls of adjacent ridges, and grooves are formed on the surface of the ridges;

[0008] The grooves are created on the side walls of the ridge.

[0009] In one embodiment, grooves are correspondingly formed on the sidewalls of adjacent ridges.

[0010] In one embodiment, the ridges are all disposed on one side surface of the bipolar plate body.

[0011] In one embodiment, each sidewall of the ridge has at least two grooves.

[0012] In one embodiment, the bipolar plate body is made of one of the following materials: graphite, titanium, titanium alloy, aluminum, aluminum alloy, stainless steel, copper, nickel, and nickel alloy.

[0013] In one embodiment, the grooves are all uniformly opened along the length direction of the ridge;

[0014] And / or, the grooves are opened in an uneven shape along the length of the ridge.

[0015] In one embodiment, the trench is configured as one of a rectangular, trapezoidal, triangular, semi-circular, or irregular shape.

[0016] In one embodiment, several ridges are evenly distributed among each other.

[0017] In one embodiment, an assembly positioning part is provided along the edge of the bipolar plate body.

[0018] A fuel cell having a fuel cell bipolar plate as described in any of the above claims.

[0019] The aforementioned fuel cell bipolar plate includes a bipolar plate body. Several ridges are arranged on the surface of the bipolar plate body, spaced apart, and each ridge has a corresponding sidewall. An airflow channel is formed between the sidewalls of adjacent ridges. Grooves are formed on the sidewalls of the ridges that form the airflow channel. The airflow channel formed between the sidewalls of adjacent ridges provides a path for reactant gases (such as hydrogen and oxygen) or cooling media, ensuring smooth material transport within the fuel cell and ensuring the continuous and efficient electrochemical reaction. The grooves on the sidewalls of the ridges that form the airflow channel increase the contact area between the airflow and the ridge sidewall, promoting uniform distribution of reactant gases within the channel and improving gas utilization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the fuel cell bipolar plate provided in an embodiment of this application.

[0021] Figure 2 This is a magnified view of a partial structure of the fuel cell bipolar plate provided in an embodiment of this application.

[0022] Figure 3 This is a magnified view of a portion of the fuel cell bipolar plate provided in an embodiment of this application, viewed from the side.

[0023] Figure 4 This is a stack performance diagram of a grooveless fuel cell bipolar plate.

[0024] Figure 5 This is a stack performance diagram of a fuel cell bipolar plate with grooves.

[0025] Icon labels:

[0026] 1000, Bipolar plate body; 1001, Assembly and positioning part; 2000, Ridge; 3000, Airflow channel; 4000, Groove. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the fuel cell bipolar plate provided in the embodiments of this application. Figure 2 This is an enlarged view of a partial structure of the fuel cell bipolar plate provided in an embodiment of this application. Figure 3This is a partial enlarged view of the fuel cell bipolar plate provided in the embodiments of this application, viewed from the side. The fuel cell bipolar plate shown includes a bipolar plate body 1000. Several ridges 2000 are arranged on the surface of the bipolar plate body 1000, spaced apart. Each ridge 2000 and its adjacent ridges 2000 have opposing sidewalls. An airflow channel 3000 is formed between the sidewalls of adjacent ridges 2000. Grooves 4000 are formed on the sidewalls of the ridges 2000 that form the airflow channel 3000. The airflow channel 3000 formed between the sidewalls of adjacent ridges 2000 provides a flow path for reactant gases (such as hydrogen and oxygen) or cooling media, ensuring smooth material transport within the fuel cell and ensuring the continuous and efficient electrochemical reaction. The ridge 2000 forms grooves 4000 on the sidewall of the gas flow channel 3000, which increases the contact area between the gas flow and the sidewall of the ridge 2000, promotes the uniform distribution of the reactant gas in the flow channel, reduces the dead volume during gas transport, and improves gas utilization. Dead volume refers to the space occupied by certain areas (e.g., corners with extremely low or even stagnant flow rates, gaps not fully covered by gas) within the gas flow channel 3000 formed between the sidewalls of adjacent ridges 2000 when the reactant gas cannot undergo effective electrochemical reactions with the bipolar plate surface or electrodes, nor can it be discharged from the flow channel in a timely manner.

[0034] The ridges 2000 are spaced apart, and each ridge 2000 has a corresponding sidewall to its adjacent ridge 2000. Specifically, each ridge 2000 has a sidewall, and each ridge 2000 has at least one sidewall that is opposite to the sidewall of its adjacent ridge 2000. The purpose is to form airflow channels 3000 at least between the sidewalls, and grooves 4000 are correspondingly formed on these sidewalls.

[0035] Meanwhile, the trenches 4000 also enhance the disturbance effect on airflow, break the boundary layer that may form during gas flow, and strengthen the heat and mass transfer effect between the gas and the bipolar plate surface, thereby improving the overall performance and operational stability of the fuel cell. Furthermore, this structural design, while ensuring the mechanical strength of the bipolar plates, optimizes the gas flow channel layout by making reasonable use of the ridge space 2000, which is conducive to the miniaturization and integration design of the fuel cell. The gas flow channel refers to the channel structure formed between the opposing sidewalls of adjacent ridges 2000. Its function is to allow reactant gases (such as oxygen or air on the cathode side and hydrogen on the anode side) to flow on the bipolar plate surface, so as to realize the transmission, distribution, and contact of gas within the fuel cell with the electrodes, providing the necessary reactants for the electrochemical reaction.

[0036] The bipolar plate body 1000, as the basic carrier of the entire structure, requires precision machining to ensure the stable arrangement of several ridges 2000. The ridges 2000 and the bipolar plate body 1000 must form a robust integral structure, which can be achieved through one-piece molding to prevent detachment or deformation during long-term use. The spacing of the ridges 2000 on the surface of the bipolar plate body 1000 must follow a specific pattern. The spacing between adjacent ridges 2000 should be consistent or exhibit a specific gradient pattern according to design requirements to ensure that the formed airflow channel 3000 has a uniform or expected width, avoiding airflow imbalance due to uneven spacing. The relative sidewalls of any ridge 2000 and its adjacent ridges 2000 must be flat and parallel to each other or at a specific angle. The flatness of the sidewalls must be controlled within a certain range to prevent excessive airflow disturbance or the formation of additional dead volume due to uneven surfaces. If it is an inclined sidewall, its inclination angle must be precisely calculated to optimize the airflow state within the channel. The cross-sectional shape of the airflow channel 3000 formed between the sidewalls of adjacent ridges 2000 is determined by the shape of both sidewalls. It can be designed as a regular shape such as rectangle, trapezoid, or triangle, or a specific irregular shape. The length of the channel must match the size of the bipolar plate body 1000 to ensure that the reaction gas or cooling medium can cover the entire effective reaction area of ​​the bipolar plate. At the same time, the inlet and outlet positions of the airflow channel 3000 must be precisely connected to the gas supply system and exhaust system of the fuel cell to ensure that the fluid can enter and exit smoothly. The grooves 4000 formed on the sidewall of the ridge 2000 to form the airflow channel 3000 should be evenly distributed or densely arranged in specific areas according to the flow characteristics within the airflow channel 3000. The extension direction of the grooves 4000 can be consistent with the length direction of the ridge 2000 or at a certain angle. If set at an angle, the angle needs to be verified by fluid dynamics simulation to achieve the best airflow disturbance effect. The number of grooves 4000 should be reasonably determined according to the length and width of the ridge 2000. Too few grooves will not fail to increase the contact area and reduce the dead volume, while too many grooves will reduce the structural strength of the ridge 2000. In addition, the edges of the grooves 4000 should be rounded to avoid sharp corners, prevent excessive local vortices during airflow, which would increase pressure loss, and reduce stress concentration at the grooves 4000, thus extending the service life of the ridge 2000. These precise structural constraints enable the bipolar plate body 1000, ridge 2000, airflow channel 3000, and groove 4000 to form an organic whole that cooperates and works together, ensuring that each part can perform its function as designed and providing a reliable structural foundation for the efficient and stable operation of the fuel cell.

[0037] In some embodiments of this application, in adjacent ridges 2000, the groove 4000 formed on the sidewall of one ridge 2000 corresponds in position to the groove 4000 formed on the opposite sidewall of the other adjacent ridge 2000; that is, the groove 4000 on the sidewall of one ridge 2000 has a corresponding groove 4000 on the sidewall of the other adjacent ridge 2000. This corresponding arrangement allows the airflow to flow more regularly within the airflow channel 3000, enhances the symmetry and uniformity of airflow disturbance, further promotes the mixing and distribution of reactant gases within the channel, reduces local dead volume, and improves the contact efficiency between the gas and the bipolar plate surface, thereby improving the reaction efficiency and operational stability of the fuel cell.

[0038] In some embodiments of this application, all the ridges 2000 are arranged only on one side surface of the bipolar plate body 1000. The single-surface airflow channel 3000 structure can be flexibly designed according to the assembly requirements and working scenarios of the fuel cell, simplifying the processing technology of the bipolar plate and reducing manufacturing costs. At the same time, it can better adapt to the installation of other components in the fuel cell, facilitate the fitting of the bipolar plate with adjacent components, reduce assembly gaps, and contribute to the compactness of the overall structure.

[0039] For example, in an open-cathode fuel cell, all the ridges 2000 are arranged on the cathode-side surface of the bipolar plate body 1000, that is, on the side surface of the bipolar plate body 1000 that contacts the cathode-side electrode of the fuel cell. The gas flow channels 3000 formed between the opposite sidewalls of adjacent ridges 2000 serve as the reaction gas channels on the cathode side, used to transport the reaction gas (such as oxygen or air) on the cathode side. The cathode side is the region where oxygen (or air) participates in the electrochemical reaction, and high requirements are placed on the uniformity of gas distribution and mass transfer efficiency. By placing the ridges 2000 on the cathode side, the flow state of the cathode reaction gas can be optimized through the ridges 2000 and the grooves 4000 on the sidewalls, enhancing gas turbulence, improving the contact efficiency between oxygen and the cathode electrode, and promoting the full occurrence of the electrochemical reaction.

[0040] In some embodiments of this application, each ridge 2000 is used to form at least two grooves 4000 on each sidewall of the airflow channel 3000. Multiple grooves 4000 can further increase the contact area between the airflow and the sidewall of the ridge 2000, enhance the disturbance effect on the airflow, more effectively break the boundary layer of the airflow, promote the uniform distribution of reactant gases and the mass and heat transfer process, reduce dead volume, and improve the performance of the fuel cell; at the same time, the arrangement of multiple grooves 4000 can also enhance the structural strength of the ridge 2000 to a certain extent.

[0041] The width of the groove 4000 is set between 0.05mm and 1mm, and the depth is set between 0.1mm and 0.8mm. The groove 4000 is processed by wire cutting, machining, or chemical etching. Setting the groove 4000 within the range of 0.05mm-1mm in width and 0.1mm-0.8mm in depth ensures that the groove 4000 effectively disturbs the airflow and increases the contact area, while avoiding the situation where the ridge 2000 structure is weakened due to excessive size, or difficult to process and affecting the stability of airflow due to insufficient size. A balance is achieved between structural strength and mass transfer efficiency. Wire cutting, machining, and chemical etching each have their advantages. Wire cutting can achieve high-precision machining, ensuring the accuracy of the dimensions of the 4000 groove. Machining is suitable for a variety of materials, and the process is mature and efficient. Chemical etching can be used to process complex-shaped 4000 grooves, and is especially suitable for mass production. These processing methods can meet the processing requirements of the 4000 groove under different material and structural needs, ensuring the forming quality and consistency of the 4000 groove, thereby ensuring the overall performance of the fuel cell bipolar plate.

[0042] In some embodiments of this application, the bipolar plate body 1000 is made of one of the following materials: graphite, titanium, titanium alloy, aluminum, aluminum alloy, stainless steel, copper, nickel, and nickel alloy.

[0043] The material selection for the bipolar plate body 1000 needs to be determined based on the fuel cell's operating environment, performance requirements, and cost control objectives, choosing one from graphite, titanium, titanium alloys, aluminum, aluminum alloys, stainless steel, copper, nickel, and nickel alloys. For example, if high conductivity and corrosion resistance are required and weight is not a concern, graphite can be used; if high strength and impact resistance are desired, titanium alloys can be used; if cost and basic performance need to be balanced, aluminum alloys or stainless steel can be selected.

[0044] In some embodiments of this application, the trenches 4000 can be regularly spaced along the length of the ridge 2000 at equal intervals; or, the trenches 4000 can be irregularly spaced at unequal intervals or with different shapes along the length of the ridge 2000; or some trenches 4000 can be uniformly spaced while others are irregularly shaped. Uniformly spaced trenches 4000 ensure that airflow disturbances and contact areas are evenly distributed along the length of the ridge 2000, guaranteeing reaction stability; irregularly shaped trenches 4000 can be specifically designed according to the gas flow characteristics at different locations within the flow channel, enhancing disturbances or increasing contact area in specific regions to optimize local mass transfer. Combining these two approaches allows for more flexible adaptation to different reaction requirements, improving the overall efficiency of the fuel cell.

[0045] In some embodiments of this application, the cross-sectional shape of the trench 4000 is selected from rectangular, trapezoidal, triangular, semi-circular, and irregular shapes. Different shapes of trenches 4000 have different effects on airflow disturbance and contact area. For example, rectangular trenches 4000 can provide a larger contact area, while semi-circular trenches 4000 facilitate smooth airflow. The appropriate shape of the trench 4000 can be selected according to the requirements of the fuel cell for gas flow characteristics, mass transfer efficiency, etc., to optimize the reaction conditions within the airflow channel 3000 and improve fuel cell performance.

[0046] In some embodiments of this application, multiple ridges 2000 are regularly arranged at equal intervals on the surface of the bipolar plate body 1000. This ensures that the width of the airflow channels 3000 formed between adjacent ridges 2000 is consistent, guaranteeing the uniform distribution of reactant gas in each channel and avoiding uneven gas flow caused by differences in channel width. This results in more uniform reactions in each region of the fuel cell, improving overall operational stability and efficiency.

[0047] In some embodiments of this application, structures for assembly positioning, such as positioning holes, positioning protrusions, and positioning grooves, are provided at the edge of the bipolar plate body 1000. The assembly positioning part 1001 can quickly and accurately position and assemble the bipolar plate with other components during the fuel cell assembly process, ensuring the relative positional accuracy between components, reducing assembly errors, improving assembly efficiency, and also helping to enhance the stability and sealing of the overall fuel cell structure.

[0048] In a comparative test experiment, two 15-cell short stacks with an active area of ​​37.4 cm² were used for testing and comparison. One stack used a 4000-cell fuel cell bipolar plate without grooves, while the other used a 4000-cell fuel cell bipolar plate with grooves. All other parameters of the assembled short stacks remained unchanged. The following stack performance comparison chart was obtained under the condition that the tests on the two short stacks were consistent. (Reference) Figure 4 The image shows the stack performance of a 4000 grooveless fuel cell bipolar plate. Figure 5 The image shows the performance of a fuel cell stack with a bipolar plate featuring a 4000-groove configuration. It is evident that the power output of the fuel cell with the 4000-groove configuration is significantly increased.

[0049] A fuel cell is equipped with the aforementioned fuel cell bipolar plate and adopts the aforementioned fuel cell bipolar plate with optimized structure. This fuel cell can possess the various advantages brought by the bipolar plate, such as more uniform distribution of reactant gases, better mass and heat transfer effect, higher gas utilization rate, and more stable structure, thereby improving the overall working performance, operating stability and service life of the fuel cell, while also facilitating the miniaturization, integration and low cost development of the fuel cell.

[0050] In the aforementioned structural design of the fuel cell bipolar plate, from the perspective of improving air intake flow rate and heat exchange efficiency to enhance fuel cell performance, the airflow channel 3000 formed between the sidewalls of adjacent ridges 2000 provides a flow path for reactant gases such as air. The grooves 4000 on the sidewalls of the ridges 2000 positively promote the increase in air intake flow rate. Normally, when gas flows within the channel, its flow state is relatively stable due to the restriction of the ridges 2000 sidewalls, but localized low flow velocities can easily occur, limiting the intake flow rate to some extent. The presence of the grooves 4000 breaks this singular flow pattern. When air flows through the grooves 4000, localized vortices and disturbances are formed within them. These disturbances allow the airflow to pass more smoothly through the airflow channel 3000, reducing flow loss caused by poor gas flow and thus increasing the air intake flow rate.

[0051] Meanwhile, the increased air intake provides more oxygen for the electrochemical reactions inside the fuel cell, allowing the reactions to proceed more fully and thus improving the fuel cell's output power. The trench 4000 also plays a crucial role in heat exchange efficiency. Fuel cells generate a significant amount of heat during operation; if this heat cannot be dissipated in time, it will cause the cell temperature to rise, affecting its performance and lifespan. The trench 4000 increases the contact area between the airflow and the sidewalls of the ridge 2000. When air flows within the airflow channel 3000, it has more sufficient contact with the sidewalls of the ridge 2000, carrying away more heat. Furthermore, the enhanced airflow disturbance of the trench 4000 breaks down the boundary layer formed during gas flow, allowing heat to be transferred more quickly from the bipolar plate surface to the airflow, significantly improving heat exchange efficiency. By increasing the air intake flow and heat exchange efficiency, this bipolar plate structural design effectively improves the overall performance of the fuel cell, enabling it to maintain stable and efficient operation under various working conditions.

[0052] Subtractive processing of the ridges in the airflow field to form grooves can further reduce the weight of the electrode. From an analytical perspective, the ridges 2000 on the bipolar plate body 1000 are crucial structures constituting the airflow channel 3000. Traditionally, the ridges 2000 are solid structures, which, while ensuring a certain level of mechanical strength, also increase the overall weight of the electrode. However, by forming grooves 4000 on the ridges 2000 in the airflow field through subtractive processing, some excess material is removed without affecting the main function and mechanical strength of the ridges 2000, thus achieving a reduction in electrode weight.

[0053] Reducing the weight of the bipolar plates is crucial for fuel cell applications, especially in fields with stringent weight requirements, such as automotive and aerospace. Lighter plates reduce the overall weight of the fuel cell, contributing to increased energy density and range. Simultaneously, weight reduction decreases the load on the fuel cell during installation and operation, reducing wear and tear on related components and energy consumption, thus improving equipment reliability and lifespan. Furthermore, this weight reduction method, achieved through subtractive processing to create the 4000 grooves, does not negatively impact other bipolar plate performance characteristics. The 4000 groove design itself optimizes airflow and heat / mass transfer, enhancing fuel cell performance while simultaneously reducing weight.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fuel cell bipolar plate, characterized in that, The fuel cell bipolar plate includes: A bipolar plate body (1000) has several ridges (2000) arranged on its surface. The ridges (2000) are spaced apart, and each ridge (2000) and its adjacent ridge (2000) have opposing sidewalls; An airflow channel (3000) is formed between the sidewalls of adjacent ridges (2000), and a groove (4000) is formed on the surface of the ridge (2000). The groove (4000) is formed on the side wall of the ridge (2000).

2. The fuel cell bipolar plate according to claim 1, characterized in that, The grooves (4000) on the sidewalls of the adjacent ridges (2000) are correspondingly formed.

3. The fuel cell bipolar plate according to claim 1, characterized in that, The ridges (2000) are all disposed on one side surface of the bipolar plate body (1000).

4. The fuel cell bipolar plate according to claim 1, characterized in that, At least two grooves (4000) are formed on each sidewall of the ridge (2000).

5. The fuel cell bipolar plate according to claim 1, characterized in that, The material of the bipolar plate body (1000) is set to one of graphite, titanium, titanium alloy, aluminum, aluminum alloy, stainless steel, copper, nickel, and nickel alloy.

6. The fuel cell bipolar plate according to claim 1, characterized in that, The grooves (4000) are all uniformly opened along the length direction of the ridge (2000); And / or, the grooves (4000) are all opened in an uneven shape along the length direction of the ridge (2000).

7. The fuel cell bipolar plate according to claim 1, characterized in that, The groove (4000) is configured as one of the following shapes: rectangular, trapezoidal, triangular, semi-circular, and irregular.

8. The fuel cell bipolar plate according to claim 1, characterized in that, The ridges (2000) are evenly distributed among the ridges.

9. The fuel cell bipolar plate according to claim 1, characterized in that, The edge of the bipolar plate body (1000) is provided with an assembly positioning part (1001).

10. A fuel cell, characterized in that, The fuel cell bipolar plate has any one of the claims 1-9.

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