Battery cell, fuel cell stack, and vehicle

Abstract

The present application relates to the technical field of fuel cells, and discloses a battery cell, a fuel cell stack, and a vehicle. The battery cell comprises: a negative electrode sheet and a positive electrode sheet arranged in parallel; and a membrane electrode arranged between the negative electrode sheet and the positive electrode sheet, and at least partially arranged obliquely with respect to the negative electrode sheet and the positive electrode sheet, so that the flow areas of reaction medium cavities formed between the membrane electrode and the negative electrode sheet and between the membrane electrode and the positive electrode sheet decrease in the flow direction of reaction media.

Description

Battery cell, fuel cell stack and vehicle

[0001] Cross-reference to related applications

[0002] The embodiments of the present application are based on and claim priority to Chinese Patent Application No. 202410878838.4, filed on July 2, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of fuel cells, and particularly relates to a battery cell, a fuel cell stack and a vehicle. BACKGROUND

[0004] In existing hydrogen fuel cells, the oxygen reaction activity on the cathode side is low. A common method is to add some tapered structures in the existing flow channels to promote the flow of oxygen towards the membrane electrode, so that more oxygen contacts the membrane electrode to react. However, this inevitably leads to an increase in pressure loss of gas and cooling liquid, increases the load of the air compressor, increases the risk of water flooding, and the complex structure increases the cost in subsequent simulation and processing. SUMMARY

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery cell, a fuel cell stack and a vehicle, which not only improves the reaction rate, but also has small flow channel pressure loss, small air compressor load, convenient drainage, simple structure and low processing cost.

[0006] In a first aspect, the present application provides a battery cell, comprising:

[0007] parallelly arranged cathode plates and anode plates;

[0008] a membrane electrode arranged between the cathode plates and the anode plates, and at least partially arranged obliquely relative to the cathode plates and the anode plates, so that the flow area of a reaction medium cavity formed between the membrane electrode, the cathode plates and the anode plates presents a decreasing trend along the flow direction of the reaction medium.

[0009] In a second aspect, the present application provides a fuel cell stack, comprising the battery cell of any one of the technical solutions in the first aspect.

[0010] In a third aspect, the present application provides a vehicle, comprising the fuel cell stack of any one of the technical solutions in the second aspect, and the fuel cell stack is used to provide electric energy for the vehicle.

[0011] According to the vehicle of the present application, the reaction rate of the fuel cell stack is higher, and the flow channel pressure loss is small, the air compressor load is small, the drainage is convenient, the structure is simple, the processing cost is low, the vehicle endurance and durability are improved, and the vehicle production cost is reduced.

[0012] Additional aspects and advantages of the present application will be in part apparent and in part pointed out below in the description. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0014] Fig. 1 is a schematic structural view of a battery cell according to an embodiment of the present application;

[0015] Fig. 2 is a schematic partial cross-sectional structural view of a battery cell according to an embodiment of the present application;

[0016] Fig. 3 is a schematic structural view of a battery cell according to an embodiment of the present application;

[0017] Fig. 4 is a schematic partial cross-sectional structural view of a battery cell according to an embodiment of the present application;

[0018] Fig. 5 is a schematic cross-sectional view of a sealing ring according to an embodiment of the present application.

[0019] REFERENCE NUMERALS

[0020] 1, battery cell; 11, cathode plate; 12, anode plate; 101, manifold port region; 102, active region; 13, membrane electrode; 14, cathode sealing ring; 15, anode sealing ring. Embodiments of the present application

[0021] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters are used throughout the figures to denote the same or like components. The embodiments described below are exemplary, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0022] A battery cell according to an embodiment of the present application is described below with reference to Figs. 1-5.

[0023] Referring to Figs. 1, 2, 3, and 4, a battery cell 1 according to an embodiment of the present application includes cathode plates 11 and anode plates 12 arranged in parallel, and a membrane electrode 13.

[0024] The cathode plates 11 and the anode plates 12 are arranged in parallel and spaced apart from each other, and the membrane electrode 13 is arranged obliquely between the cathode plates 11 and the anode plates 12, so that the flow area of a reaction medium cavity formed between the membrane electrode 13 and the cathode plates 11 and the anode plates 12 decreases in the flow direction of the reaction medium.

[0025] By setting the membrane electrode 13 to be inclined relative to the cathode plate 11 and the anode plate 12, so that the membrane electrode 13 forms an included angle with the cathode plate 11 and the anode plate 12, and the reaction medium can include air and hydrogen, the membrane electrode 13 forms an air cavity with the cathode plate 11 and a hydrogen cavity with the anode plate 12, the flow area of the oxygen cavity decreases along the flow direction of the oxygen, so that the oxygen has a tendency to approach the membrane electrode 13 during the flow, thereby improving the reaction efficiency of the oxygen. It can be understood that the flow direction of the hydrogen in the hydrogen cavity is opposite to the flow direction of the oxygen, so that the flow area of the hydrogen cavity also decreases along the flow direction of the hydrogen, so that the hydrogen has a tendency to approach the membrane electrode 13 during the flow, thereby improving the reaction efficiency of the hydrogen.

[0026] In addition, the membrane electrode 13, the cathode plate 11 and the anode plate 12 are all set to be planar at the parts corresponding to the active area 102, so that the walls of the hydrogen cavity and the oxygen cavity are straight flow channels. Compared with setting protrusions or bosses in the flow channels or setting the flow channels as turbulence structures, the flow channels in the embodiment have small pressure loss, thereby reducing the load of the air compressor, and the flow channels have no protrusions and other structures, so that the drainage efficiency is higher and the structure is simple and the processing cost is low.

[0027] According to the battery cell 1 provided in the embodiment, by setting the membrane electrode 13 to be inclined relative to the cathode plate 11 and the anode plate 12, more reaction medium can enter the membrane electrode 13 to react, the reaction rate is improved, the flow channel has small pressure loss, the load of the air compressor is small, the drainage is convenient, the structure is simple and the processing cost is low.

[0028] The embodiment will be described in detail from two different implementation angles.

[0029] I. The cathode plate 11 and the anode plate 12 are set to be inclined:

[0030] Please refer to FIG. 1 and FIG. 2. In some embodiments, the cathode plate 11 and the anode plate 12 can be provided with two total pipe port areas 101, which can be symmetrically distributed at both ends of the length direction of the cathode plate 11 and the anode plate 12. The active area 102 of the cathode plate and the active area 102 of the anode plate are arranged in the area surrounded by the two total pipe port areas 101. The membrane electrode 13 can be parallel to the total pipe port area 101 of the cathode plate and the total pipe port area 101 of the anode plate. The active area 102 of the cathode plate and the active area 102 of the anode plate can be arranged at an included angle with the total pipe port area 101.

[0031] The cathode plate 11 can be provided with two total port areas 101, in which the inlets and outlets of the reaction medium and the cooling medium are arranged, for example, one of the two total port areas 101 can be provided with a hydrogen inlet, an oxygen outlet and a cooling medium inlet; the other can be provided with a hydrogen outlet, an oxygen inlet and a cooling medium outlet. It can be understood that the two total port areas 101 on the anode plate 12 are arranged correspondingly to the cathode plate 11. The active area 102 is arranged in the area enclosed by the two total port areas 101, so that the reaction medium and the cooling medium flow through the active area 102 to react.

[0032] In the embodiment, the two total port areas 101 of the cathode plate 11 are arranged in parallel, and the two ends of the active area 102 of the cathode plate are arranged at an angle with the two total port areas 101; the two total port areas 101 of the anode plate 12 are also arranged in parallel, and the two ends of the active area 102 of the anode plate are arranged at an angle with the two total port areas 101. It can be understood that the total port areas 101 of the cathode plate 11 and the anode plate are arranged in parallel correspondingly, and the active areas 102 of the cathode plate 11 and the anode plate are arranged in parallel correspondingly.

[0033] In the embodiment, the two total port areas 101 of the cathode plate 11 are arranged in parallel, and the two ends of the active area 102 of the cathode plate are arranged at an angle with the two total port areas 101; the two total port areas 101 of the anode plate 12 are also arranged in parallel, and the two ends of the active area 102 of the anode plate are arranged at an angle with the two total port areas 101. It can be understood that the total port areas 101 of the cathode plate 11 and the anode plate are arranged in parallel correspondingly, and the active areas 102 of the cathode plate 11 and the anode plate are arranged in parallel correspondingly.

[0034] II. Inclined arrangement of the membrane electrode 13:

[0035] Please refer to FIG. 3 and FIG. 4, in some other embodiments, the cathode plate 11 and the anode plate 12 are both provided with two total port areas 101, which are symmetrically distributed at the two ends of the length direction of the cathode plate 11 and the anode plate 12, the active area 102 of the cathode plate and the active area 102 of the anode plate are arranged in the area enclosed by the two total port areas 101, and the corresponding part of the membrane electrode 13 and the active area 102 of the cathode plate and the anode plate and the corresponding part of the membrane electrode 13 and the total port area 101 of the cathode plate and the total port area 101 of the anode plate are arranged at an angle.

[0036] The cathode plate 11 can be provided with two total port areas 101, and the total port areas 101 are provided with the inlets and outlets of the reaction medium and the inlets and outlets of the cooling medium. For example, one of the two total port areas 101 can be provided with a hydrogen inlet, an oxygen outlet and a cooling medium inlet; and the other one can be provided with a hydrogen outlet, an oxygen inlet and a cooling medium outlet. It can be understood that the two total port areas 101 on the anode plate 12 are correspondingly arranged on the cathode plate 11. The active area 102 is arranged in the area enclosed by the two total port areas 101, so that the reaction medium and the cooling medium flow through the active area 102 to react.

[0037] The cathode plate 11 and the anode plate 12 are both arranged in a plane, and the part of the membrane electrode 13 corresponding to the total port area 101 is parallel to the cathode plate 11 and the anode plate 12. The part of the membrane electrode 13 corresponding to the active area 102 and the part of the membrane electrode 13 corresponding to the total port area 101 are relatively inclined, so that the part of the membrane electrode 13 corresponding to the active area 102 is relatively inclined to the cathode plate 11 and the anode plate 12, thereby changing the flow area of the active area 102 and improving the reaction efficiency.

[0038] Please refer to FIG. 1 and FIG. 3, according to some embodiments of the present application, a cathode sealing ring 14 is arranged between the membrane electrode 13 and the cathode plate 11, and the thickness of the cathode sealing ring 14 decreases along the flow direction of the reaction medium, so that the flow area of the reaction medium cavity formed between the membrane electrode 13 and the cathode plate 11 decreases along the flow direction.

[0039] The cathode sealing ring 14 can seal the air cavity formed between the membrane electrode 13 and the cathode plate 11, and the cathode sealing ring 14 also supports the membrane electrode 13 and the cathode plate 11, and the air cavity is formed by the thickness of the cathode sealing ring 14. By setting the thickness of the cathode sealing ring 14 to decrease along the flow direction of the reaction medium, the gap between the membrane electrode 13 and the cathode plate 11 decreases along the flow direction of the air, and at least part of the membrane electrode 13 is relatively inclined to the cathode plate 11 and the anode plate 12.

[0040] The thickness of the part of the cathode sealing ring 14 corresponding to the total port area 101 of the cathode plate can remain unchanged, and the thickness of the part of the cathode sealing ring 14 corresponding to the active area 102 of the cathode plate gradually decreases along the flow direction of the air, so that the part of the membrane electrode 13 corresponding to the active area 102 of the cathode plate is relatively inclined to the cathode plate 11.

[0041] An anode sealing ring 15 is arranged between the membrane electrode 13 and the anode plate 12, and the thickness of the anode sealing ring 15 decreases along the flow direction of the reaction medium, so that the flow area of the reaction medium cavity formed between the membrane electrode 13 and the anode plate 12 decreases along the flow direction.

[0042] The anode sealing ring 15 can seal the hydrogen cavity formed between the membrane electrode 13 and the anode plate 12, and the anode sealing ring 15 also supports the membrane electrode 13 and the anode plate 12, and the thickness of the anode sealing ring 15 separates the membrane electrode 13 and the anode plate 12 to form the hydrogen cavity. The thickness of the anode sealing ring 15 is arranged to decrease along the flow direction of the reaction medium, so that the gap between the membrane electrode 13 and the anode plate 12 decreases along the flow direction of the hydrogen, and at least part of the membrane electrode 13 is inclined relative to the anode plate 12.

[0043] The thickness of the part of the anode sealing ring 15 corresponding to the total port area 101 of the anode plate can remain unchanged, and the thickness of the part of the anode sealing ring 15 corresponding to the active area 102 of the anode plate gradually decreases along the flow direction of the hydrogen, so that the part of the membrane electrode 13 corresponding to the active area 102 of the anode plate is inclined relative to the anode plate 12.

[0044] According to some embodiments of the present application, the cross-sectional area of the cathode sealing ring 14 at different positions is the same, and the cross-sectional area of the anode sealing ring 15 at different positions is the same.

[0045] The inclined space between the cathode plate 11 and the membrane electrode 13 is supported by the cathode sealing ring 14. In order to ensure the consistency of the angle of each plate or membrane electrode 13 after stacking, the cross-sectional area of the cathode sealing ring 14 at different positions needs to be the same, so that the support force provided by the cathode sealing ring 14 at different positions is the same.

[0046] The inclined space between the anode plate 12 and the membrane electrode 13 is supported by the anode sealing ring 15. In order to ensure the consistency of the angle of each plate or membrane electrode 13 after stacking, the cross-sectional area of the anode sealing ring 15 at different positions needs to be the same, so that the support force provided by the anode sealing ring 15 at different positions is the same.

[0047] Please refer to FIG. 5, in some embodiments, the cross section of the cathode sealing ring 14 and the anode sealing ring 15 can be a convex shape, by changing the height direction of the convex shape, that is, the thickness direction of the cathode sealing ring 14 and the anode sealing ring 15, by changing the height and width of the convex shape, the cross-sectional shape of the cathode sealing ring 14 and the anode sealing ring 15 at different positions is changed, so as to provide the same support force and sealing effect under different height changes.

[0048] For example, the cathode sealing ring 14, the left cathode sealing ring 14' in Figure 5 is a cross-sectional view of the cathode sealing ring 14 close to the total pipe port area 101 on the side of the cathode plate 11 provided with the air inlet port, and the right cathode sealing ring 14" is a cross-sectional view of the cathode sealing ring 14 close to the total pipe port area 101 on the side of the cathode plate 11 provided with the air outlet port.

[0049] According to some embodiments of the present application, the angle between at least part of the membrane electrode 13 and the cathode plate 11 is 4°-10°; the angle between at least part of the membrane electrode 13 and the anode plate 12 is 4°-10°.

[0050] By limiting the angle range between the membrane electrode 13 and the cathode plate 11 and the anode plate 12 support, the relative inclination angle between the membrane electrode 13 and the cathode plate 11 is avoided to be too small, the disturbance effect on the reaction medium is improved; and the relative inclination angle between the membrane electrode 13 and the cathode plate 11 is avoided to be too large, the overall volume of the stack is controlled, the volume power is improved, and the probability of fluid blockage at the outlet of the reaction medium cavity is reduced.

[0051] In the formula, the angle between at least part of the membrane electrode 13 and the cathode plate 11 is in the range of [4°, 10°], and exemplarily, the angle between at least part of the membrane electrode 13 and the cathode plate 11 can be 4°, 5°, 6°, 7°, 8°, 9°, 10° or other angles between 4°-10°, and in a preferred embodiment, the angle between at least part of the membrane electrode 13 and the cathode plate 11 can be in the range of [5°, 8°].

[0052] It can be understood that, because the anode plate 12 is parallel to the cathode plate 11, the angle between the membrane electrode 13 and the anode plate 12 is also the angle between the membrane electrode 13 and the cathode plate 11, which is not described here.

[0053] According to some embodiments of the present application, the battery cell 1 can include a bipolar plate and a membrane electrode 13, and the bipolar plate is formed by welding the cathode plate 11 and the anode plate 13.

[0054] In the case where the active area 102 in the bipolar plate is arranged at an angle with the total pipe port area 101, the sealing ring for sealing the membrane electrode 13 and the bipolar plate is injection molded on the membrane electrode 13.

[0055] In the case where the active area 102 of the bipolar plate is arranged at an angle with the total pipe port area 101, the active area 102 of the bipolar plate is inclined, and the membrane electrode 13 is arranged in a plane, and the sealing ring is integrally injection molded on the membrane electrode 13 to reduce the process difficulty and improve the molding quality.

[0056] Alternatively, in the case where the membrane electrode 13 and the active area 102 of the bipolar plate and the manifold port area 101 of the bipolar plate are arranged at an angle, the sealing ring for sealing the membrane electrode 13 and the bipolar plate is injection molded on the bipolar plate.

[0057] In the case where the membrane electrode 13 and the active area 102 of the bipolar plate and the manifold port area 101 of the bipolar plate are arranged at an angle, at least part of the membrane electrode 13 is arranged in an inclined manner, and the bipolar plate is arranged in a planar manner, the sealing ring is integrally injection molded on the bipolar plate, so as to reduce the process difficulty and improve the molding quality.

[0058] According to some embodiments of the present application, the cathode plate 11, the membrane electrode 13 and the anode plate 12 can be connected into a single cell by the integrally injection molded sealing ring.

[0059] The single cell is formed by integrally injection molding the sealing according to the stacking order of the cathode plate 11, the membrane electrode 13 and the anode plate 12. This facilitates the testing and optimization of the performance of each part, and also facilitates the maintenance and replacement. In addition, the single cell is more compact, which helps to reduce the volume and weight of the entire fuel cell system.

[0060] According to some embodiments of the present application, in the case where the active area 102 and the manifold port area 101 of the cathode plate 11 and the anode plate 12 are arranged at an angle, the sealing ring for sealing the membrane electrode 13 and the cathode plate 11 and the anode plate 12 is injection molded on the membrane electrode 13, so as to reduce the process difficulty and improve the molding quality.

[0061] Alternatively, in the case where the membrane electrode 13 and the active area 102 of the cathode plate and the active area 102 of the anode plate and the membrane electrode 13 and the manifold port area 101 of the cathode plate and the manifold port area 101 of the anode plate correspond to the parts arranged at an angle, the sealing ring for sealing the membrane electrode 13 and the cathode plate 11 and the anode plate 12 is injection molded on the cathode plate 11 and the anode plate 12, so as to reduce the process difficulty and improve the molding quality.

[0062] The embodiments of the present application also provide a fuel cell stack, which comprises the cell unit 1 according to any one of the technical solutions described above.

[0063] It can be understood that, because the fuel cell stack according to the embodiments of the present application comprises the cell unit 1 according to any one of the technical solutions described above, the fuel cell stack has the technical features and effects of the cell unit 1 according to any one of the technical solutions described above, which will not be described herein.

[0064] According to the fuel cell stack of the embodiments of the present application, the reaction rate of the cell unit 1 is higher, thereby improving the reaction rate of the entire fuel cell stack, the flow channel pressure loss is small, the air compressor load is small, the drainage is convenient, and the structure is simple and the processing cost is low.

[0065] According to some embodiments of the present application, the cathode plate 11 and the anode plate 12 can each be provided with two total pipe port areas 101, which are symmetrically distributed at both ends of the length direction of the cathode plate 11 and the anode plate 12, and in the case that the active area 102 of the cathode plate and the active area 102 of the anode plate are arranged at an angle with the total pipe port area 101 of the cathode plate and the total pipe port area 101 of the anode plate being parallel to the membrane electrode 13, the fuel cell further comprises two profiled parts, and a plurality of cell units 1 are arranged between the two profiled parts.

[0066] Because the active area 102 of the cathode plate and the active area 102 of the anode plate are arranged at an angle with the total pipe port area 101, so that after the plurality of cell units 1 are stacked, the two ends of the length direction of the cathode plate 11 and the anode plate 12 located at the end form a drop, which causes the fuel cell stack to be not well packaged. By arranging the two profiled parts at both ends in the stacking direction of the stack, the profiled parts support and flatten the positions where the drop is formed, facilitating the packaging of the fuel cell stack and improving the stability of the overall structure.

[0067] Exemplarily, in the cathode plate 11 located at the end, the total pipe port area 101 provided with the air inlet port and the total pipe port area 101 provided with the air outlet port form a height difference. The profiled part can be arranged on the side of the total pipe port area 101 provided with the air outlet port to make up for the height difference, so that the surface of the profiled part away from the cell unit 1 is flush with the total pipe port area 101 provided with the air inlet port, or the surface of the profiled part away from the cell unit 1 is a plane parallel to the membrane electrode 13, and the profiled part close to the total pipe port area 101 provided with the air outlet port is provided with a protrusion, and the protrusion is supported on the total pipe port area 101 provided with the air outlet port. It can be understood that the profiled part arranged on the side close to the anode plate 12 located at the end is the same, and will not be described here.

[0068] The embodiments of the present application also provide a vehicle comprising the fuel cell stack according to any one of the above technical solutions, and the fuel cell stack is used to provide electric energy for the vehicle.

[0069] It can be understood that because the vehicle according to the embodiments of the present application comprises the fuel cell stack according to any one of the above technical solutions, the vehicle has the technical features and effects of the fuel cell stack according to any one of the above technical solutions, and will not be described here.

[0070] According to the vehicle provided by the embodiments of the present application, the reaction rate of the fuel cell stack is higher, the flow channel pressure loss is small, the air compressor load is small, the drainage is convenient, the structure is simple, the processing cost is low, the vehicle endurance and durability are improved, and the vehicle production cost is reduced.

[0071] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of the terms so construed can inter-change, such that "first" and "second" are interchangeable with "second" and "first", respectively, and vice versa. The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "And / or" as used in the specification and in the claims, unless specifically stated otherwise, presents "and / or", both conjunctive and disjunctive alternatives. That is, "and / or" as used in the specification and in the claims means "and / or", both conjunctive and disjunctive alternatives.

[0072] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counter-clockwise", "axial", "radial", "circumferential" and the like indicate relative positions after the orientations or positional relationships shown in the drawings are taken as reference, and are merely intended for convenience of description and simplification of description, and are not intended to indicate or imply that a device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application.

[0073] In the description of the present application, "a first feature", "a second feature" can include one or more of the features.

[0074] In the description of the present application, "a plurality of" means two or more.

[0075] In the description of the present application, "above" or "below" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0076] In the description of the present application, "above", "over" and "on" of a first feature to a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature.

[0077] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "certain embodiments" or "exemplary embodiment" etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The illustrative representations of the above terms in the specification do not necessarily refer to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0078] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell, comprising: a cathode plate and an anode plate arranged in parallel; a membrane electrode arranged between the cathode plate and the anode plate and at least partially arranged obliquely relative to the cathode plate and the anode plate so that a flow area of a reaction medium cavity formed between the membrane electrode and the cathode plate and the anode plate presents a decreasing trend along a flow direction of the reaction medium.

2. The battery cell of claim 1, wherein, The cathode plate and the anode plate are each provided with two total pipe port areas symmetrically distributed at two ends of a length direction of the cathode plate and the anode plate, an active area of the cathode plate and the anode plate is arranged in an area surrounded by the two total pipe port areas, the membrane electrode is parallel to the total pipe port areas of the cathode plate and the anode plate, and the active area of the cathode plate and the anode plate is arranged at an angle with the total pipe port areas.

3. The battery cell of claim 1, wherein, The cathode plate and the anode plate are each provided with two total pipe port areas symmetrically distributed at two ends of a length direction of the cathode plate and the anode plate, an active area of the cathode plate and the anode plate is arranged in an area surrounded by the two total pipe port areas, and the membrane electrode is arranged at an angle with a portion corresponding to the active area of the cathode plate and the anode plate and a portion corresponding to the total pipe port areas of the cathode plate and the anode plate.

4. The battery cell of any one of claims 1-3, wherein, A cathode sealing ring is arranged between the membrane electrode and the cathode plate, a thickness of the cathode sealing ring presents a decreasing trend along a flow direction of the reaction medium so that a flow area of a reaction medium cavity formed between the membrane electrode and the cathode plate presents a decreasing trend along the flow direction; An anode sealing ring is arranged between the membrane electrode and the anode plate, a thickness of the anode sealing ring presents a decreasing trend along a flow direction of the reaction medium so that a flow area of a reaction medium cavity formed between the membrane electrode and the anode plate presents a decreasing trend along the flow direction.

5. The battery cell of claim 4, wherein, Cross-sectional areas of the cathode sealing ring at different positions are all the same, and cross-sectional areas of the anode sealing ring at different positions are all the same.

6. The battery cell of any one of claims 1-3, wherein, An angle between at least a portion of the membrane electrode and the cathode plate is 4°-10°, and an angle between at least a portion of the membrane electrode and the anode plate is 4°-10°.

7. The battery cell of claim 2 or 3, wherein, The battery cell comprises a bipolar plate and a membrane electrode, the bipolar plate is formed by welding the cathode plate and the anode plate; wherein, In a case where the active area and the total pipe port area in the bipolar plate are arranged at an angle, a sealing ring for sealing the membrane electrode and the bipolar plate is injection molded on the membrane electrode; or, In a case where the portion corresponding to the active area of the membrane electrode and the bipolar plate and the portion corresponding to the total pipe port area of the membrane electrode and the bipolar plate are arranged at an angle, a sealing ring for sealing the membrane electrode and the bipolar plate is injection molded on the bipolar plate; Or, the cathode plate, the membrane electrode and the anode plate are connected by a sealing ring injection molded as a whole to form a single battery cell. 8.A fuel cell stack comprising the battery cell according to any one of claims 1-7.

9. The fuel cell stack of claim 8, wherein, The cathode plate and the anode plate are each provided with two total pipe orifice areas, the two total pipe orifice areas are symmetrically distributed at two ends of the length direction of the cathode plate and the anode plate, in the case that the membrane electrode is parallel to the total pipe orifice areas of the cathode plate and the anode plate, the active areas of the cathode plate and the anode plate are arranged at an angle with the total pipe orifice areas, the fuel cell further comprises two profiled parts, and a plurality of the cell units are stacked between the two profiled parts.

10. A vehicle comprising a fuel cell stack as claimed in claim 8 or 9 for providing electrical energy to the vehicle.

Images