An air-cooled hydrogen fuel cell system

Abstract

The application relates to a forced air hydrogen fuel cell system which comprises a fastener, an air equalizing cover, a core assembly, a first end plate assembly and a second end plate assembly; the first end plate assembly is arranged on the end face of one end of the core assembly, the second end plate assembly is arranged on the end face of the other end of the core assembly; the core assembly is sleeved outside the air equalizing cover; one end of the air equalizing cover is arranged at the geometric center of the second end plate assembly, the other end of the air equalizing cover is in contact with the first end plate assembly; the first end plate assembly is connected with the second end plate assembly through the fastener, and the fastener is arranged outside the core assembly. The application has the advantages of compact structure, large volume power density, small anode flow channel flow resistance, small pressure drop of inlet and outlet air, uniform cathode end air inlet, good sealing effect of the sealed groove used in the anode, good current collecting plate conductivity and corrosion resistance, and the like, and can meet the practical use requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fuel cell, and particularly relates to a wind-cooled hydrogen fuel cell system. BACKGROUND

[0002] Fuel cells have the advantages of cleanness, environmental protection and simple structure, and have been widely applied to various fields of our daily life, such as various vehicle systems (such as hydrogen fuel cell buses, logistics vehicles, heavy trucks, sanitation vehicles, etc.), standby power sources and household energy storage devices, etc. Generally, an anode plate, a cathode plate and a membrane electrode constitute a single cell, and multiple single cells are connected in series and in parallel to form a fuel cell stack to realize high voltage and then output the required voltage and power.

[0003] The wind-cooled fuel cell stack is generally in a cubic structure, and the air inlet mechanism is usually arranged on one side of the polar plate, so that the overall volume of the stack is large, and the air suction or blowing at the junction of multiple fans is uneven, which easily causes large voltage difference of single cells at the junction and then affects the performance of the entire stack. In addition, the hydrogen inlet and outlet of the cubic structure wind-cooled stack are generally arranged on both sides of the reaction zone, and since the hydrogen inlet and outlet need to be provided with sealing rubber strips, when the wind-cooled stack is working, the deformation of the entire stack is inconsistent, which is not conducive to the stability of the sealing. Based on the properties of the rectangular polar plate, the hydrogen flow channel of the rectangular polar plate structure is generally a serpentine flow field or an interdigital flow field, and the flow channel resistance coefficient of these flow fields is large, which significantly affects the pressure drop of the hydrogen inlet and outlet. In addition, based on the characteristics of the rectangular polar plate, the pressing screw rod is usually distributed in a rectangular shape, and it is difficult to coincide the centers of the connecting surfaces of the rectangular distribution with the centers of the connecting surfaces of the circular distribution, which is difficult to meet the needs of actual use. SUMMARY

[0004] The present application aims to solve the technical problems of the existing wind-cooled stack structure, such as uneven air suction or blowing, large flow channel resistance coefficient, inconsistent deformation of the entire stack, and difficulty in coinciding the centers of the connecting surfaces of the rectangular distribution with the centers of the connecting surfaces of the circular distribution during assembly, and provides a wind-cooled hydrogen fuel cell system. The device structure of the present application is compact, the volume power density is large, the pressure drop of the anode end gas inlet and outlet is small, the cathode end air inlet is uniform, and the needs of actual use can be met.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application provides a wind-cooled hydrogen fuel cell system, which comprises a fastener, an air equalizing cover, a stack core assembly, a first end plate assembly and a second end plate assembly; the first end plate assembly is arranged on the end face of one end of the stack core assembly, and the second end plate assembly is arranged on the end face of the other end of the stack core assembly.

[0006] The core assembly is sleeved outside the air equalizing cover; one end of the air equalizing cover is arranged at the geometric center of the second end plate assembly, and the other end of the air equalizing cover is in contact with the first end plate assembly; the first end plate assembly is connected with the second end plate assembly through the fastener, and the fastener is arranged outside the core assembly.

[0007] As a preferred embodiment, the air-cooled hydrogen fuel cell system is in a cylindrical structure. The whole stack is in a cylindrical structure, and each component is also in a cylindrical structure, so that the air inlet is located at the center of the cylinder, and the air equalizing cover is arranged at the center of the cylinder, so that the air path can adopt an inward radiation path, ensuring the uniformity of the air inlet.

[0008] As a preferred embodiment, the air equalizing cover is provided with a plurality of air permeable holes, and the plurality of air permeable holes are uniformly distributed in the circumferential direction and the axial direction.

[0009] As a preferred embodiment, the core assembly comprises a cathode tail plate, a plurality of membrane electrodes, a plurality of polar plates and an anode tail plate arranged in a stack; the plurality of membrane electrodes and the plurality of polar plates are arranged between the cathode tail plate and the anode tail plate; the membrane electrode is arranged between the adjacent two polar plates, between the cathode tail plate and the polar plate, and between the anode tail plate and the polar plate; the cathode tail plate is arranged close to the second end plate assembly, and the anode tail plate is arranged close to the first end plate assembly.

[0010] As a preferred embodiment, one side of the polar plate is a cathode surface, and the other side is an anode surface; the cathode tail plate is connected with the anode surface of the polar plate close to the cathode tail plate through the membrane electrode; and the anode tail plate is connected with the cathode surface of the polar plate close to the anode tail plate through the membrane electrode.

[0011] As a preferred embodiment, the cathode surface comprises a plurality of flow channels arranged in a radial manner, and the plurality of flow channels are uniformly arranged on the cathode surface; the flow channel comprises a flow channel ridge and a flow channel groove arranged adjacent to each other; and the flow channel ridge and the flow channel groove of the plurality of flow channels are arranged alternately on the cathode surface.

[0012] As a preferred embodiment, the flow channel groove is a rectangular flow channel groove, and the flow channel ridge is a fan-shaped flow channel ridge.

[0013] As a preferred embodiment, the ratio of the area of the flow channel groove to the area of the flow channel ridge is 1.27-1.30.

[0014] As a preferred embodiment, the flow channel comprises an inlet end transition zone, a reaction zone and an outlet end transition zone, the reaction zone is arranged between the inlet end transition zone and the outlet end transition zone, and the inlet end transition zone is arranged inside the cathode surface.

[0015] As a preferred embodiment, the longitudinal section of the flow channel ridge near the inlet end transition zone is a similar acute triangle.

[0016] As a preferred embodiment, the longitudinal section of the flow channel ridge near the outlet end transition zone is a similar rectangle.

[0017] As a preferred embodiment, the anode surface is provided with a plurality of spiral flow channels; each of the spiral flow channels comprises a spiral flow channel groove and a spiral flow channel ridge arranged adjacently; the spiral flow channel ridges and the spiral flow channel grooves of the plurality of spiral flow channels are arranged alternately on the anode surface. By arranging the spiral flow channels, the hydrogen gas has a smaller pressure loss and a smaller resistance coefficient along the channel.

[0018] As a preferred embodiment, the ratio of the area of the spiral flow channel groove to the area of the spiral flow channel ridge is 1.52-1.60.

[0019] As a preferred embodiment, the inlet end of the spiral flow channel is arranged on the inner side of the anode surface, and the outlet end of the spiral flow channel is arranged on the outer side of the anode surface.

[0020] As a preferred embodiment, the inlet end of the spiral flow channel and the outlet end of the spiral flow channel are arranged in the same side sector area of the anode surface; the geometric center of the anode surface is taken as the center of a circle, the line connecting the inlet end of the spiral flow channel and the center of the circle is a first line, the line connecting the outlet end of the spiral flow channel and the center of the circle is a second line, and the angle formed by the intersection of the first line and the second line at the center of the circle is 8°-10°.

[0021] As a preferred embodiment, a concave wavy member is arranged in the inlet end of the spiral flow channel, and the concave wavy member is arranged at 90° in the inlet end of the spiral flow channel.

[0022] As a preferred embodiment, a plurality of booster columns are arranged in the outlet end of the spiral flow channel, and each of the booster columns is arranged at 90° in the outlet end of the spiral flow channel.

[0023] As a preferred embodiment, the widths between the booster columns gradually increase in an arithmetic progression from the outlet end to the inlet end of the spiral flow channel.

[0024] As a preferred embodiment, a sealing groove is further arranged on the anode surface, and the sealing groove is arranged on the outer side of the spiral flow channel; the sealing groove comprises a plurality of sealing ridges and a plurality of sealing grooves, the sealing ridges and the sealing grooves are arranged alternately; the height of the sealing ridges decreases from the middle sealing ridges to both sides.

[0025] As a preferred implementation, the first end plate assembly comprises a first end plate, a first current collecting plate and a quick plug; the first current collecting plate is embedded on the inner side of the first end plate, and the first current collecting plate abuts against the anode tail plate; and the quick plug is arranged on the outer side of the first end plate.

[0026] As a preferred implementation, the first end plate is provided with a quick plug interface, and the quick plug is arranged on the quick plug interface.

[0027] As a preferred implementation, the first current collecting plate comprises a first graphite filling area and a first current collecting plate body, the first graphite filling area is embedded on the inner side of the first current collecting plate body, and the area of the first graphite filling area is greater than that of the reaction area.

[0028] As a preferred implementation, the first current collecting plate body is provided with a fan-shaped notch, and the fan-shaped notch is arranged opposite to the quick plug interface.

[0029] As a preferred implementation, the second end plate assembly comprises a second end plate and a second current collecting plate; the second current collecting plate is embedded on the inner side of the second end plate, and the second current collecting plate abuts against the cathode tail plate.

[0030] As a preferred implementation, the second current collecting plate comprises a second graphite filling area and a second current collecting plate body, the second graphite filling area is embedded on the inner side of the second current collecting plate body, and the area of the second graphite filling area is greater than that of the reaction area.

[0031] When assembled, the structure of the application can be assembled by using ring-distributed pressure pile screws, the line connecting the quick plug and the center of the first end plate is on the same straight line as the position of one of the pressure pile screws, which can well improve the sealing pressure of the hydrogen inlet and outlet, and the distance between each pressure pile screw meets the requirement of 8d, where d is the diameter of the pressure pile screw.

[0032] In the technical solution provided by the application, the following beneficial effects are achieved:

[0033] The application can effectively solve the technical problems of the existing air-cooled electric pile structure, such as uneven air extraction or blowing, large flow field flow passage resistance coefficient, inconsistent deformation of the whole pile, difficulty in overlapping the centers of the rectangular distribution connection surfaces of the pressure pile screws during assembly, etc. The device structure of the application is compact, the volume power density is large, the pressure drop of the anode end gas inlet and outlet is small, the cathode end air inlet is uniform, the anode adopts a spiral flow channel, the flow resistance is small, the anode sealing adopts a sealing groove mode, the sealing effect is good, the current collecting plate is filled with graphite, the production cost is low, the electric conductivity and corrosion resistance are good. When assembled, the structure of the application can be assembled by using ring-distributed pressure pile screws, which can well improve the sealing pressure of the hydrogen inlet and outlet, and has good stress uniformity and sealing effect. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of an air-cooled hydrogen fuel cell system according to an embodiment of the present invention;

[0036] Figure 2 for Figure 1 A schematic diagram of the longitudinal section of an air-cooled hydrogen fuel cell system;

[0037] Figure 3 for Figure 1 A schematic diagram of the core assembly of an air-cooled hydrogen fuel cell system;

[0038] Figure 4 for Figure 3 A schematic diagram of the cathode surface of the electrode plate of the reactor core assembly;

[0039] Figure 5 for Figure 3 A schematic diagram of the anode surface of the electrode plate of the core assembly;

[0040] Figure 6 for Figure 5 A magnified view at point E;

[0041] Figure 7 for Figure 1 A schematic diagram of the structure of the first current collector of the first end plate assembly of the air-cooled hydrogen fuel cell system;

[0042] Figure 8 for Figure 1 A schematic diagram of the structure of the second current collector of the second end plate assembly of an air-cooled hydrogen fuel cell system.

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, top, bottom, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element.

[0048] In addition, if the embodiments of the present application involve "first", "second" and the like, the "first", "second" and the like are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0049] As shown in Figures 1-2 The air-cooled hydrogen fuel cell system provided by the embodiments of the present application comprises a fastener 10, an air equalizing cover 20, a core assembly 30, a first end plate assembly 40 and a second end plate assembly 50; the first end plate assembly 40 is arranged on the end face of one end of the core assembly 30, and the second end plate assembly 50 is arranged on the end face of the other end of the core assembly 30;

[0050] The core assembly 30 is arranged outside the air equalizing cover 20; one end of the air equalizing cover 20 is arranged at the geometric center of the second end plate (lower end plate) assembly 50, and the other end of the air equalizing cover 20 is in contact with the first end plate (upper end plate) assembly 40; the first end plate assembly 40 is connected with the second end plate assembly 50 through the fastener 10, and the fastener 10 is arranged outside the core assembly 30.

[0051] As a preferred embodiment, the air-cooled hydrogen fuel cell system is in a cylindrical structure. The whole stack adopts a cylindrical structure, and each component also adopts a cylindrical structure, so that the air inlet is located at the center of the cylinder, and the air equalizing cover is arranged at the center of the cylinder, so that the air path can adopt an inward-outward radiation path, ensuring the uniformity of the air inlet.

[0052] As a preferred embodiment, as shown in Figure 2 As shown in the figure, the air equalizing cover 20 is provided with a plurality of air permeable holes 21, and the plurality of air permeable holes 21 are uniformly distributed in the circumferential direction and the axial direction. In this way, when the external high-pressure air enters the air equalizing cover, the air equalizing cover can disperse the high-pressure air, and the dispersed air enters the cathode surface of the polar plate uniformly through the air permeable holes.

[0053] As a preferred embodiment, as shown in Figure 3 As shown in the figure, the core assembly 30 includes a cathode tail plate 31, a plurality of membrane electrodes 32, a plurality of polar plates 33, and an anode tail plate 34 arranged in a stack; the plurality of membrane electrodes 32 and the plurality of polar plates 33 are arranged between the cathode tail plate 31 and the anode tail plate 34; the membrane electrode 32 is arranged between the adjacent two polar plates 33, between the cathode tail plate 31 and the polar plate 33, and between the anode tail plate 34 and the polar plate 33; the cathode tail plate 31 is arranged close to the second end plate assembly 50, and the anode tail plate 34 is arranged close to the first end plate assembly 40.

[0054] As a preferred embodiment, one side of the polar plate 33 is a cathode surface 331, and the other side is an anode surface 332; the cathode tail plate 31 is connected with the anode surface 332 of the polar plate 33 close to the cathode tail plate 31 through the membrane electrode 32; and the anode tail plate 34 is connected with the cathode surface 331 of the polar plate 33 close to the anode tail plate 34 through the membrane electrode 32.

[0055] As a preferred embodiment, as shown in Figure 4As shown in the figure, the cathode surface 331 comprises a plurality of flow channels A arranged in a radial manner, and the plurality of flow channels A are evenly arranged on the cathode surface 331; the flow channel A comprises a flow channel ridge A1 and a flow channel groove A2 arranged adjacently; the flow channel ridge A1 and the flow channel groove A2 of the plurality of flow channels A are arranged alternately on the cathode surface 331. In the embodiment of the present application, the flow channel A is an oxygen flow channel.

[0056] As a preferred implementation, the flow channel groove A2 is a rectangular flow channel groove, and the flow channel ridge A1 is a fan-shaped flow channel ridge. In this way, the reaction efficiency can be improved.

[0057] As a preferred implementation, the ratio of the area of the flow channel groove A2 to the area of the flow channel ridge A1 is 1.27-1.30. In this way, the reaction efficiency can be improved. Specifically, in the embodiment, the ratio of the area of the flow channel groove A2 to the area of the flow channel ridge A1 is 1.27.

[0058] As a preferred implementation, the flow channel A comprises an inlet end transition zone A3, a reaction zone A4, and an outlet end transition zone A5, the reaction zone 4 is arranged between the inlet end transition zone A3 and the outlet end transition zone A5, and the inlet end transition zone A3 is arranged on the inner side of the cathode surface 331.

[0059] As a preferred implementation, the longitudinal section of the flow channel ridge A1 close to the inlet end transition zone A3 is a sharp-angle-like triangle. In this way, backflow is facilitated.

[0060] As a preferred implementation, the longitudinal section of the flow channel ridge A1 close to the outlet end transition zone A5 is a rectangle. In this way, the heat dissipation area can be effectively increased, and heat dissipation is facilitated.

[0061] As a preferred implementation, as shown in the figure, the anode surface 332 is provided with a plurality of spiral flow channels B; each spiral flow channel B comprises a spiral flow channel groove B1 and a spiral flow channel ridge B2 arranged adjacently; the spiral flow channel ridge B2 and the spiral flow channel groove B1 of the plurality of spiral flow channels B are arranged alternately on the anode surface 332. By arranging the spiral flow channel B, the hydrogen gas has a small pressure loss and a small resistance coefficient along the way. In the embodiment of the present application, the spiral flow channel B is an oxygen flow channel. Figure 5 As a preferred implementation, the ratio of the area of the spiral flow channel groove B1 to the area of the spiral flow channel ridge B2 is 1.52-1.60. In this way, the reaction efficiency can be improved. Specifically, in the embodiment, the ratio of the area of the spiral flow channel groove B1 to the area of the spiral flow channel ridge B2 is 1.52.

[0062]

[0063] ​As a preferred embodiment, the inlet end B3 of the spiral flow channel B is arranged at the inner side of the anode surface 332, and the outlet end B4 of the spiral flow channel B is arranged at the outer side of the anode surface 332. In this way, the hydrogen inlet and outlet are located at the same side of the membrane electrode reaction zone, which is beneficial to improve the reaction efficiency.

[0064] As a preferred embodiment, the inlet end B3 of the spiral flow channel B and the outlet end B4 of the spiral flow channel B are arranged in the same sector region of the anode surface 332; the geometric center of the anode surface 332 is taken as the center of a circle, the line connecting the inlet end B3 of the spiral flow channel B and the center is a first line, the line connecting the outlet end B4 of the spiral flow channel B and the center is a second line, and the angle formed by the intersection of the first line and the second line at the center is 8°-10° (10° in this embodiment). In this way, the planar utilization of the electrode plate, the membrane electrode, and the end plate can be well improved, the area of the reaction zone is increased, and the volume power density of the entire stack is further improved.

[0065] As a preferred embodiment, as shown in Figures 5-6 The inlet end B3 of the spiral flow channel B is arranged with an inner concave wavy member B31, which is arranged at 90° in the inlet of the spiral flow channel B. The inner concave wavy member has the functions of reducing pressure and increasing reaction area.

[0066] As a preferred embodiment, the outlet end B4 of the spiral flow channel B is arranged with a plurality of pressure increasing columns B41, each of which is arranged at 90° in the outlet of the spiral flow channel B. After the internal reaction, the pressure of hydrogen is reduced, and by arranging the pressure increasing columns, the pressure difference caused by the pressure reduction can be well balanced.

[0067] As a preferred embodiment, from the outlet end B4 to the inlet end B3 of the spiral flow channel B, the width between the pressure increasing columns B41 gradually increases in an arithmetic progression.

[0068] As a preferred embodiment, the anode surface 332 is further arranged with a sealing groove C, which is arranged at the outer side of the spiral flow channel B; the sealing groove C includes a plurality of sealing ridges C1 and a plurality of sealing grooves C2, which are arranged alternately; the height of the sealing ridges C1 decreases from the middle sealing ridges C1 to both sides. By arranging the sealing groove C, the sealing effect of the sealing ring can be well enhanced; among them, the sealing ridges C1 can increase the pressure of the sealing ring on the sealing groove, and the sealing grooves C2 can increase the length of the sealing effect. The number of the sealing ridges and the sealing grooves can be arranged according to the actual use needs.

[0069] As a preferred implementation, the first end plate assembly 40 comprises a first end plate 41, a first current collector plate 42 and a quick plug 43; the first current collector plate 42 is embedded on the inner side of the first end plate 41, and the first current collector plate 42 abuts against the anode tail plate 34; the quick plug 43 is arranged on the outer side of the first end plate 41. In this way, the assembly of the entire stack is facilitated, the height of the entire stack can be effectively reduced, and the volume power density of the entire stack can be effectively improved.

[0070] As a preferred implementation, the first end plate 41 is provided with a quick plug interface (not labeled in the figure), and the quick plug 43 is arranged on the quick plug interface.

[0071] As a preferred implementation, as shown in Figure 7 The first current collector plate 42 comprises a first graphite filling area 421 and a first current collector plate body 422, the first graphite filling area 421 is embedded on the inner side of the first current collector plate body 422, and the area of the first graphite filling area 421 is greater than the area of the reaction area A4. In this way, the electrical conductivity and corrosion resistance of the first current collector plate 42 can be improved.

[0072] As a preferred implementation, the first current collector plate body 422 is provided with a fan-shaped notch 423, and the fan-shaped notch 423 is arranged opposite to the quick plug interface.

[0073] As a preferred implementation, the second end plate assembly 50 comprises a second end plate 51 and a second current collector plate 52; the second current collector plate 52 is embedded on the inner side of the second end plate 51, and the second current collector plate 52 abuts against the cathode tail plate 31. In this way, the assembly of the entire stack is facilitated, the height of the entire stack can be effectively reduced, and the volume power density of the entire stack can be effectively improved.

[0074] As a preferred implementation, as shown in Figure 8 The second current collector plate 52 comprises a second graphite filling area 521 and a second current collector plate body 522, the second graphite filling area 521 is embedded on the inner side of the second current collector plate body 522, and the area of the second graphite filling area 521 is greater than the area of the reaction area A4. In this way, the electrical conductivity and corrosion resistance of the second current collector plate 52 can be improved.

[0075] During assembly, the structure of the present application can be assembled by using ring-distributed compression screws, the line connecting the quick plug and the center of the first end plate is on the same straight line as the position of one of the compression screws, which can effectively improve the sealing pressure of the hydrogen inlet and outlet, and the distance between each compression screw satisfies the requirement of 8d, where d is the diameter of the compression screw.

[0076] The application can effectively solve the technical problems of the existing air-cooled electric pile structure, such as uneven air extraction or blowing, large flow field flow passage resistance coefficient, inconsistent deformation of the whole pile, difficulty in overlapping the centroid of the rectangular distribution connection joint surface of the pressure pile screw rod during assembly, and the like. The device structure is compact, the volume power density is large, the pressure drop of the anode end gas inlet and outlet is small, the cathode end air inlet is uniform, the anode adopts a spiral flow channel, the flow resistance is small, the anode sealing adopts a sealing groove mode, the sealing effect is good, the current collecting plate adopts graphite filling, the production cost is low, and the electric conductivity and corrosion resistance are good. During the structure assembly, the annular uniformly distributed pressure pile screw rod can be used, the sealing pressure of the hydrogen gas inlet and outlet can be well improved, and good stress uniformity and sealing effect are obtained.

[0077] The above description is only the preferred embodiment of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like within the inventive concept of the application and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. An air-cooled hydrogen fuel cell system, characterized by comprising: The application relates to a wind-cooled hydrogen fuel cell system, which comprises a fastener, a uniform air cover, a core assembly, a first end plate assembly and a second end plate assembly; the first end plate assembly is arranged on the end face of one end of the core assembly, and the second end plate assembly is arranged on the end face of the other end of the core assembly; The core assembly is arranged outside the uniform air cover; one end of the uniform air cover is arranged at the geometric center of the second end plate assembly, and the other end of the uniform air cover is in contact with the first end plate assembly; the first end plate assembly is connected with the second end plate assembly through the fastener, and the fastener is arranged outside the core assembly; A plurality of air permeable holes are arranged on the uniform air cover, and the air permeable holes are uniformly distributed in the circumferential direction and the axial direction; The wind-cooled hydrogen fuel cell system is in a cylindrical structure; The core assembly comprises a cathode tail plate, a plurality of membrane electrodes, a plurality of polar plates and an anode tail plate which are arranged in a stack; One side of the polar plate is a cathode surface, and the other side is an anode surface; The cathode surface comprises a plurality of flow channels arranged in a radial manner, and the flow channels are uniformly arranged on the cathode surface; the flow channel comprises a flow channel ridge and a flow channel groove which are arranged adjacent to each other; the flow channel ridges and the flow channel grooves of the plurality of flow channels are alternately arranged on the cathode surface; A plurality of spiral flow channels are arranged on the anode surface; each spiral flow channel comprises a spiral flow channel groove and a spiral flow channel ridge which are arranged adjacent to each other; the spiral flow channel ridges and the spiral flow channel grooves of the plurality of spiral flow channels are alternately arranged on the anode surface; The inlet end of the spiral flow channel and the outlet end of the spiral flow channel are arranged in the same side sector area of the anode surface; the geometric center of the anode surface is taken as the center, the connecting line between the inlet end of the spiral flow channel and the center is a first connecting line, the connecting line between the outlet end of the spiral flow channel and the center is a second connecting line, and the angle formed by the first connecting line and the second connecting line intersecting at the center is 8-10 degrees.

2. The air-blast hydrogen fuel cell system of claim 1, wherein, The plurality of membrane electrodes and the plurality of polar plates are arranged between the cathode tail plate and the anode tail plate; the membrane electrodes are arranged between two adjacent polar plates, between the cathode tail plate and the polar plate and between the anode tail plate and the polar plate; the cathode tail plate is arranged close to the second end plate assembly, and the anode tail plate is arranged close to the first end plate assembly.

3. The air-blast hydrogen fuel cell system of claim 2, wherein, The cathode tail plate is connected with the anode surface of the polar plate close to the cathode tail plate through the membrane electrode, and the anode tail plate is connected with the cathode surface of the polar plate close to the anode tail plate through the membrane electrode.

4. The air-blast hydrogen fuel cell system of claim 1, wherein, The flow channel groove is a rectangular flow channel groove, and the flow channel ridge is a sector-shaped flow channel ridge; The area ratio of the flow channel groove to the flow channel ridge is 1.27-1.

30.

5. The air-blast hydrogen fuel cell system of claim 1, wherein, The flow channel comprises an inlet end transition area, a reaction area and an outlet end transition area, the reaction area is arranged between the inlet end transition area and the outlet end transition area, and the inlet end transition area is arranged on the inner side of the cathode surface; The longitudinal section of the flow channel ridge close to the inlet end transition area is a sharp-angle triangle-like shape; The longitudinal section of the flow channel ridge close to the outlet end transition area is a rectangle-like shape.

6. The air- breathing hydrogen fuel cell system of claim 1, wherein, The ratio of the area of the spiral flow channel groove to the area of the spiral flow channel ridge is 1.52-1.60; The inlet end of the spiral flow channel is arranged on the inner side of the anode surface, and the outlet end of the spiral flow channel is arranged on the outer side of the anode surface.

7. The air-blast hydrogen fuel cell system of claim 6, wherein, A concave wavy member is arranged in the inlet end of the spiral flow channel, and the concave wavy member is arranged at 90° in the inlet of the spiral flow channel.

8. The air-blast hydrogen fuel cell system of claim 6, wherein, A plurality of booster columns are arranged in the outlet end of the spiral flow channel, each booster column is arranged at 90° in the outlet of the spiral flow channel, and the width between the booster columns gradually increases in an equal difference series from the outlet end to the inlet end of the spiral flow channel.

9. The air-blast hydrogen fuel cell system of claim 1, wherein, A sealing groove is further arranged on the anode surface, the sealing groove is arranged on the outer side of the spiral flow channel, the sealing groove includes a plurality of sealing ridges and a plurality of sealing grooves, the sealing ridges and the sealing grooves are arranged alternately, and the height of the sealing ridges decreases from the middle sealing ridges to both sides.

10. The air-cooled hydrogen fuel cell system of claim 5, wherein, The first end plate assembly includes a first end plate, a first current collecting plate, and a quick plug connector, the first current collecting plate is embedded on the inner side of the first end plate, and the first current collecting plate abuts against the anode tail plate, and the quick plug connector is arranged on the outer side of the first end plate.

11. The air- breathing hydrogen fuel cell system of claim 10, wherein, The first end plate is provided with a quick plug interface, and the quick plug connector is arranged on the quick plug interface. The first current collecting plate includes a first graphite filling area and a first current collecting plate body, the first graphite filling area is embedded on the inner side of the first current collecting plate body, and the area of the first graphite filling area is greater than the area of the reaction area. The first current collecting plate body is provided with a fan-shaped notch, and the fan-shaped notch is arranged opposite to the quick plug interface.

12. The air- breathing hydrogen fuel cell system of claim 5, wherein, The second end plate assembly includes a second end plate and a second current collecting plate, the second current collecting plate is embedded on the inner side of the second end plate, and the second current collecting plate abuts against the cathode tail plate.

13. The air- breathing hydrogen fuel cell system of claim 12, wherein, The second current collecting plate includes a second graphite filling area and a second current collecting plate body, the second graphite filling area is embedded on the inner side of the second current collecting plate body, and the area of the second graphite filling area is greater than the area of the reaction area.

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