Air-cooled fuel cell stack structure

Abstract

The embodiment of the invention discloses an electric pile structure of an air-cooled fuel cell. The electric pile structure comprises an electric pile body and a radiator module arranged on the electric pile body, the electric pile body comprises a plurality of first polar plates, second polar plates and membrane electrodes which are alternately arranged, the membrane electrodes are arranged between the first polar plates and the second polar plates, and the membrane electrodes abut against the first polar plates and the second polar plates respectively; one side, close to the membrane electrode, of the second polar plate is provided with an air path runner, one side, far away from the air path runner, of the second polar plate is internally provided with a groove, a heat pipe is arranged in the groove, and the heat pipe is connected with the radiator module. The air-cooled fuel cell stack is simple in structure, convenient to disassemble, assemble and maintain, good in stability, economical, safe and practical, the heat dissipation performance of the stack can be greatly improved on the basis that the air-cooled fuel cell stack is not changed, and the actual use requirement is well met.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to an air-cooled fuel cell stack structure. Background Art

[0002] A heat pipe is a heat dissipation method that uses phase changes, such as evaporation of a medium at the hot end and condensation at the cold end, to achieve rapid heat transfer. A heat pipe generally consists of a shell, a wick, and end caps. Heat pipes can be divided into evaporation, insulation, and condensation sections. When the evaporation section is heated, the medium inside the pipe rapidly vaporizes into steam, absorbing a large amount of heat. Capillary forces cause the steam to diffuse to the condensation section, where it condenses and releases heat. The steam then returns to the evaporation section due to the capillary action of the porous material within the heat pipe. This cycle repeats until thermal equilibrium is achieved within the pipe.

[0003] Air-cooled fuel cells are a type of proton exchange membrane fuel cell that uses air as a cooling medium. They have attracted attention for their simple structure and good applicability. They operate by generating electricity, water, and heat through the electrochemical reaction of hydrogen (as fuel) and oxygen (from the air). Air-cooled fuel cells with an open cathode directly use air as the reaction gas and heat dissipation medium, eliminating the need for complex water-cooling piping and supporting systems. This results in a low system complexity and high reliability, while also reducing manufacturing and maintenance costs. These advantages make them attractive for applications such as portable and small mobile power sources.

[0004] Arranging independent air supply and cooling lines in portable power supplies, drones, and two-wheeled power-assisted vehicles will significantly increase system power consumption and complexity while reducing system reliability. In addition, the performance requirements of the fuel cell stack in the above-mentioned application scenarios are increasing, and the heat generation of the fuel cell stack increases significantly with the increase in performance requirements. In order to achieve high performance, long life, and safe operation of fuel cells, good heat dissipation design is one of the research and development focuses of air-cooled fuel cells. The main sources of heat in the operation of fuel cells are heat generated by ohmic resistance, heat released by condensation of water vapor generated by the reaction, heat of irreversible reaction, and entropy change of electrochemical reaction. About 5% of the waste heat can be carried out of the stack by air exhaust, and most of the heat still needs to be discharged outside the stack with the help of a medium. Therefore, it is extremely important to increase the heat dissipation power density of the fuel cell during actual use.

[0005] Although there are related fuel cell heat dissipation and cooling devices or systems in the prior art, such as coolant circulation heat removal, air cooling and liquid evaporative cooling, boiling heat exchange and other technologies. However, since such systems require pumps, heat exchangers and pipe circulation systems, they are not suitable for space-constrained application scenarios such as hydrogen drones and portable mobile power supplies. In addition, in response to the growing performance requirements of the fuel cell stack, it is difficult to achieve further improvement in power density for cathode open fuel cell stacks that use fans to provide air cooling. In addition, common thermal management technologies include inserting heat spreaders into the interior of the plates to achieve better temperature distribution uniformity. However, when there are many plates in the stack, there will be problems with spatial layout, and its heat dissipation capacity is limited, making it difficult to match the heat dissipation and cooling requirements of air-cooled fuel cell stacks. Summary of the Invention

[0006] An embodiment of the present invention provides an air-cooled fuel cell stack structure, which aims to solve the problems of existing fuel cell stacks requiring components such as pumps, heat exchangers, and pipe circulation systems for heat dissipation, limited application scenarios, spatial layout issues, and limited heat dissipation capacity.

[0007] In order to solve the above technical problems, an embodiment of the present invention provides an air-cooled fuel cell stack structure, including a stack body and a radiator module arranged on the stack body; the stack body includes several alternately arranged first electrode plates (i.e., anode plates), second electrode plates (i.e., cathode plates) and membrane electrodes, the membrane electrode is arranged between the first electrode plate and the second electrode plate, and the membrane electrode is respectively arranged in contact with the first electrode plate and the second electrode plate; an air path flow channel is provided on the side of the second electrode plate close to the membrane electrode, and a groove is provided in the side of the second electrode plate away from the air path flow channel, a heat pipe is provided in the groove, and the heat pipe is connected to the radiator module.

[0008] As a preferred embodiment, the heat pipe is adapted to be arranged in the groove; and the pipe openings at both ends of the heat pipe are arranged toward the same side of the second electrode plate.

[0009] As a preferred embodiment, the air flow channel includes a plurality of air flow channels that are parallel to each other and independently arranged, and the air flow channel and the groove are independently arranged; the groove is a serpentine groove, and the heat pipe is a serpentine heat pipe.

[0010] As a preferred embodiment, the serpentine heat pipe is a flat serpentine heat pipe, and the cross section of the serpentine heat pipe is elliptical; the cross section refers to a cross section cut perpendicular to the short side of the second electrode plate.

[0011] As a preferred embodiment, the heat pipe includes an integrally formed condensing section, an evaporating section, and an insulating section. The insulating section is connected to the condensing section and the evaporating section, respectively. The evaporating section is disposed within the groove. The condensing section is connected to the heat sink module via a fin-piercing process. This greatly reduces assembly difficulty and improves the stability of the heat sink module.

[0012] As a preferred embodiment, the condensing section is connected to the heat dissipation fins of the radiator module; the heat dissipation fins are aluminum alloy heat dissipation fins.

[0013] In a preferred embodiment, an inlet manifold is provided at one end of the second electrode plate, and an outlet manifold is provided at the other end; the inlet manifold and the outlet manifold are arranged diagonally.

[0014] As a preferred embodiment, the air-cooled fuel cell stack structure further includes a cooling fan, which is arranged above the radiator module and at the air outlet side of the air-cooled fuel cell stack structure. The present application uses a cooling fan, which can be used to supply the gas required for the stack reaction on the one hand, and can be used for heat dissipation of the radiator module, the heat pipe condensation section and the stack on the other hand, thereby further improving the performance upper limit and heat dissipation capacity of the stack. The cooling fan adopts an exhaust working mode, that is, the direction of air flow is from the air inlet side of the stack to the air outlet side of the stack.

[0015] As a preferred embodiment, the air-cooled fuel cell stack structure further includes a first end plate (i.e., an anode end plate), an insulating plate, a first current collecting plate, a second current collecting plate, a second end plate (i.e., a cathode end plate), and an air scoop housing; the first current collecting plate is disposed at one end of the stack body, and the second current collecting plate is disposed at the other end of the stack body; the insulating plate is disposed on the side of the first current collecting plate away from the stack body; the first end plate abuts the insulating plate; the second end plate is disposed on the side of the second current collecting plate away from the stack body, and the second end plate abuts the air scoop housing; the first end plate, the insulating plate, the first current collecting plate, the second current collecting plate, the stack body, the second end plate, the radiator module, and the cooling fan are all disposed within the air scoop housing. The connection and fixation between the various components are achieved by bolts.

[0016] As a preferred embodiment, an air outlet is provided on the side of the air guide cover shell close to the air outlet side, and the heat dissipation fan is arranged in the air outlet; the heat dissipation fan is adapted to be arranged to match the air outlet.

[0017] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects: the structure of the present application can effectively improve the peak performance of the fuel cell stack by embedding a heat pipe in the second electrode plate (i.e., the cathode electrode plate), and can further improve the output power of the fuel cell stack, thereby improving the stacking capacity of the fuel cell stack; at the same time, the condensing section of the heat pipe adopts forced convection of a cooling fan, which is used to dissipate heat to the heat dissipation fins on the one hand, and to provide the gas required for the reaction for the fuel cell stack on the other hand. In addition, the heat dissipation fins and heat pipes are easy to process and can be matched with different types of fuel cells with a high degree of freedom to form different heat pipe heat dissipation modules. According to relevant theoretical analysis of the heat generation and heat dissipation of the fuel cell stack, the structure of the present application can enhance the heat dissipation capacity of the fuel cell stack by arranging different numbers of heat pipes and adopting different space allocation methods, and further improve the output performance of the fuel cell stack, thereby matching reasonable supporting heat dissipation components and implementation plans. The structure of the present application is simple, easy to disassemble and assemble, easy to maintain, has good stability, is economical, safe and practical, and can greatly improve the heat dissipation performance of the fuel cell stack without changing the air-cooled fuel cell stack, thus meeting the needs of actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of an air-cooled fuel cell stack structure according to one embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the air-cooled fuel cell stack structure;

[0021] Figure 3 for Figure 2 A schematic structural diagram of a second electrode plate containing a heat pipe;

[0022] Figure 4 for Figure 3 a cross-sectional view of the second electrode plate;

[0023] Figure 5 It is a structural diagram of the connection between the heat pipe and the radiator module.

[0024] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] Specifically, such as Figures 1 to 5 As shown, an embodiment of the present invention provides an air-cooled fuel cell stack structure, including a stack body 10 and a radiator module 20 arranged on the stack body 10; the stack body 10 includes a plurality of alternately arranged first electrode plates 11 (i.e., anode plates), second electrode plates 12 (i.e., cathode plates) and membrane electrodes 13, the membrane electrode 13 being arranged between the first electrode plate 11 and the second electrode plate 12, and the membrane electrode 13 being respectively arranged in contact with the first electrode plate 11 and the second electrode plate 12; an air path flow channel 121 is provided on a side of the second electrode plate 12 close to the membrane electrode 13, and a groove 122 is provided in a side of the second electrode plate 12 away from the air path flow channel 121, a heat pipe 123 is provided in the groove 122, and the heat pipe 123 is connected to the radiator module 20.

[0028] As a preferred embodiment, the heat pipe 123 is adapted to be arranged in the groove 122 ; and the pipe openings at both ends of the heat pipe 123 are arranged toward the same side of the second electrode plate 12 .

[0029] As a preferred embodiment, the air path flow channel 121 includes several air flow channels 1211 that are parallel to each other and independently arranged. The air flow channels 1211 and the groove 122 are independently arranged. The groove 122 is a serpentine groove, and the heat pipe 123 is a serpentine heat pipe.

[0030] As a preferred embodiment, the serpentine heat pipe is a flat serpentine heat pipe, and the cross section of the serpentine heat pipe is elliptical; the cross section refers to a cross section perpendicular to the short side of the second electrode plate 12. A liquid wick net (not marked in the figure) is provided inside the flat serpentine heat pipe.

[0031] As a preferred embodiment, the heat pipe 123 includes an integrally formed condensing section 1231, an evaporating section 1232, and an insulating section 1233. The insulating section 1233 is connected to the condensing section 1231 and the evaporating section 1232, respectively. The evaporating section 1232 is disposed within the groove 122. The condensing section 1231 is connected to the heat sink module 20 via a fin-through process. This greatly reduces assembly difficulty and improves the stability of the heat sink module 20.

[0032] As a preferred embodiment, the condensing section 1231 is connected to the heat dissipation fins 21 of the radiator module 20; the heat dissipation fins 21 are aluminum alloy heat dissipation fins.

[0033] In a preferred embodiment, an inlet manifold 124 is provided at one end of the second electrode plate 12 , and an outlet manifold 125 is provided at the other end; the inlet manifold 124 and the outlet manifold 125 are arranged diagonally.

[0034] As a preferred embodiment, the air-cooled fuel cell stack structure further includes a cooling fan 30, which is arranged above the radiator module 20, and the cooling fan 30 is arranged on the air outlet side of the air-cooled fuel cell stack structure (not marked in the figure). The present application uses the cooling fan 30, on the one hand, to supply the gas required for the stack reaction, and on the other hand, it can be used for heat dissipation of the radiator module 20, the heat pipe condensation section 1231 and the stack, further improving the performance upper limit and heat dissipation capacity of the stack. The cooling fan adopts an exhaust working mode, that is, the direction of air flow is from the air inlet side of the stack to the air outlet side of the stack.

[0035] As a preferred embodiment, the air-cooled fuel cell stack structure also includes a first end plate 40 (i.e., the anode end plate), an insulating plate 50, a first current collecting plate 60, a second current collecting plate 70, a second end plate 80 (i.e., the cathode end plate) and an air guide shell 90; the first current collecting plate 60 is arranged at one end of the stack body 10 (i.e., the first plate end), and the second current collecting plate 70 is arranged at the other end of the stack body 10 (i.e., the second plate end); the insulating plate 50 is arranged at the first current collecting plate 60 away from the stack The first end plate 40 is disposed on the side of the stack body 10; the first end plate 40 abuts the insulating plate 50; the second end plate 80 is disposed on the side of the second current collecting plate 70 away from the stack body 10, and the second end plate 80 abuts the air scoop housing 90; the first end plate 40, the insulating plate 50, the first current collecting plate 60, the second current collecting plate 70, the stack body 10, the second end plate 80, the radiator module 20, and the cooling fan 30 are all disposed within the air scoop housing 90. Bolts 100 are used to connect and secure the various components.

[0036] As a preferred embodiment, an air outlet 91 is provided on the side of the air guide cover shell 90 close to the air outlet side, and the cooling fan 30 is provided in the air outlet 91; the cooling fan 30 is adapted to be provided with the air outlet 91.

[0037] By embedding a heat pipe within the second electrode plate (i.e., the cathode plate), the structure of this application can effectively improve the peak performance of the fuel cell stack and further increase the output power of the fuel cell stack, thereby improving the stack's stacking capacity. At the same time, the condensing section of the heat pipe uses forced convection from a cooling fan to dissipate heat to the fins and provide the gas required for the fuel cell stack to react. Furthermore, the cooling fins and heat pipes are easy to manufacture, allowing for a high degree of freedom in combining different types of fuel cells to form different heat pipe cooling modules.

[0038] According to relevant theoretical analysis of the heat generation and heat dissipation of the fuel cell stack, the structure of the present application can enhance the heat dissipation capacity of the fuel cell stack by arranging different numbers of heat pipes and adopting different space allocation methods, and further improve the output performance of the fuel cell stack, thereby matching reasonable supporting heat dissipation components and implementation plans.

[0039] The theoretical design basis for heat generation and heat dissipation of the fuel cell stack in the embodiment of the present application is as follows:

[0040] When the entire fuel cell stack is running, the total heat balance relationship in the stack is:

[0041]

[0042] In formula (1), Q h The heat generated when the battery stack is working, Q water , Q gas , Q rad They represent the heat dissipation power of cooling water, the heat loss power of exhaust gas and the heat carried away by radiation respectively.

[0043] There is no cooling water in the air-cooled reactor, and the main heat generation in the reactor is theoretically calculated as follows:

[0044]

[0045] Among them, V is the rated operating voltage of the battery stack, and I is the rated current generated during operation.

[0046] The heat carried away by the cathode and anode tail gases is equal to the difference between the heat carried by the gas leaving the stack and the heat carried by the gas entering the stack:

[0047]

[0048] Where C is the specific heat of the gas, ω is the mass flow rate of the gas, and ΔT is the inlet and outlet temperature difference.

[0049] The radiation heat transfer calculation is given by the blackbody radiation law:

[0050]

[0051] Where δ is the blackness, σ is the blackbody radiation constant, T is the battery operating temperature, and T0 is the ambient temperature.

[0052] In the embodiments of this application, the heat transfer of the heat pipe, radiator, and cooling fan must meet the following requirements: The heat pipe uses the phase change of the working fluid to transfer heat, and the working fluid has a significant impact on the working characteristics of the heat pipe. The characteristics of the commonly used materials and working fluids of the heat pipe shell are shown in Table 1 below:

[0053] Table 1 Heat pipe working fluid and materials

[0054] working fluid Temperature range / ℃ Shell and tube material ethanol 0-130 Copper, stainless steel Methanol -45-120 Copper, nickel, stainless steel acetone 0-120 Copper, aluminum Deionized water 5-230 copper

[0055] Maximum heat transfer of heat pipe Q max It is an important indicator of the heat transfer performance of the heat pipe. It is very important to design a structure suitable for the heat source. max It is determined by the diameter of the steam chamber and can be preliminarily calibrated using the sonic velocity limit of the heat pipe:

[0056]

[0057] Among them, Q max is the maximum heat transfer capacity of the heat pipe, ρ is the steam density in the heat pipe, r is the latent heat of vaporization of the working medium, R is the steam gas constant, and T is the operating temperature.

[0058] The wick is made of copper and the wick needs to overcome the static pressure of the liquid column P g for:

[0059]

[0060] Capillary limit Q at the actual thickness of the wick c,max for:

[0061]

[0062] Among them, the steam friction coefficient F v and the fluid friction coefficient F l It can be expressed as:

[0063]

[0064] In order to enhance the heat dissipation capacity of the heat pipe, heat dissipation fins are connected to the condensing section of the heat pipe to increase the convection heat exchange area between it and the air. Aluminum alloy is selected as the heat dissipation fin material. The heat exchange area and heat dissipation of the heat dissipation fins can be obtained as follows:

[0065]

[0066] Among them, Q h is the heat carried away by convection, m is the mass flow rate of air, A c is the surface area of the heat sink fins.

[0067] The minimum pressure drop in the flow channel of the stack to meet the heat dissipation requirements is:

[0068]

[0069] Select a cooling fan with appropriate wind pressure according to the radiator size and the heat output of the battery stack. The technical specifications of the cooling fan are: air inlet area A fan , the static pressure that the cooling fan needs to provide must meet the following requirements:

[0070]

[0071] This application utilizes heat pipe cooling technology in an air-cooled fuel cell stack design. The fuel cell's operating temperature is 85°C or less. Excessively high temperatures significantly impact fuel cell performance and the life of the membrane electrode. Furthermore, because the heat pipe is embedded within the grooves of the second electrode plate, controlling the heat pipe's placement and shape allows for effective heat dissipation while ensuring proper support for the electrode plate.

[0072] In this embodiment, the heat pipe shell is made of copper. The working fluid within the pipe can be one or more of ethanol, methanol, acetone, or deionized water. The wick utilizes a copper wire mesh structure. The condenser section of the heat pipe is connected to flat-plate heat sink fins. A cooling fan is positioned outside the radiator module via a locking mechanism, effectively increasing the area for convective heat exchange with the air.

[0073] In one embodiment of the present application, the active area size of the stack plate is 13.5*15.78cm, and the rated working condition is 1.0A / cm 3 @0.65V, according to formulas (1) to (5), the heat generation and heat dissipation of the battery stack are 153.4W and 28.9W respectively.

[0074] The parameters of the working medium (deionized water) of the heat pipe are shown in Table 2. Based on the data in the table and formula (6), the steam chamber diameter d of the evaporation section of the heat pipe is calculated to be 0.87 mm.

[0075] Table 2 Parameters of heat pipe working medium

[0076] parameter Numerical <![CDATA[Latent heat of vaporization, r / (kJ*kg -1 )]]> 2257 <![CDATA[Steam viscosity, μ v / ((N*s)*m -2 )]]> <![CDATA[1.2×10 -5 ]]> <![CDATA[Steam density, ρ v / (kg·m -3 )]]> 0.60 <![CDATA[Liquid density, ρ l / (kg·m -3 )]]> 958 <![CDATA[Liquid viscosity, μ l / ((N*s)*m -2 )]]> <![CDATA[2.8×10 -4 ]]> <![CDATA[Surface tension, σ / (N*m -1 )]]> <![CDATA[588.6×10 -6 ]]>

[0077] The mesh number of the wick net is calculated to be 10782m -1, which is equivalent to a 268-mesh imperial mesh, and a standard 300-mesh mesh is selected; thus, according to formulas (7)-(9), the capillary limit is calculated to be 30.14W. Therefore, the diameter of the heat pipe selected in the embodiment of the present invention is 3.3mm, the mesh number of the liquid wick is 300, and the total length of the heat pipe is 47.53cm. According to formula (10), the heat sink area is calculated to be 5.87m 2 To meet the lightweight requirements of the fuel cell stack, the cross-sectional area of the heat sink fin is the same as the cross-sectional area in the thickness direction of the fuel cell stack (i.e., the distance from the upper end plate of the fuel cell stack anode to the lower end plate of the fuel cell stack anode). According to formulas (11)-(12), when air flows through the heat sink fin, it provides heat dissipation for the fuel cell stack and heat pipe. The heat dissipation capacity must be greater than 1240W. The calculation results show that the air flow rate must be at least 4m / s, that is, the flow rate must reach 3.27m 3 / min, you can choose the appropriate cooling fan specifications based on this parameter and connect the cooling fans in parallel to increase the heat dissipation.

[0078] The present application has a simple structure, is easy to assemble and disassemble, is convenient to maintain, has good stability, is economical, safe and practical, and can greatly improve the heat dissipation performance of the air-cooled fuel cell stack without changing the stack, thus meeting the needs of actual use.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air-cooled fuel cell stack structure, characterized in that: It includes a battery stack body and a radiator module arranged on the battery stack body; the battery stack body includes several alternately arranged first pole plates, second pole plates and membrane electrodes, the membrane electrode is arranged between the first pole plate and the second pole plate, and the membrane electrode is respectively arranged in contact with the first pole plate and the second pole plate; an air path flow channel is provided on the side of the second pole plate close to the membrane electrode, and a groove is provided in the side of the second pole plate away from the air path flow channel, a heat pipe is provided in the groove, and the heat pipe is connected to the radiator module.

2. The air-cooled fuel cell stack structure according to claim 1, characterized in that: The heat pipe is matched with the groove; the pipe openings at both ends of the heat pipe are arranged toward the same side of the second electrode plate.

3. The air-cooled fuel cell stack structure according to claim 1, characterized in that: The air flow channel includes a plurality of air flow channels that are parallel to each other and independently arranged. The air flow channel and the groove are independently arranged. The groove is a serpentine groove, and the heat pipe is a serpentine heat pipe.

4. The air-cooled fuel cell stack structure according to claim 3, characterized in that: The serpentine heat pipe is a flat serpentine heat pipe, and the cross section of the serpentine heat pipe is elliptical; the cross section refers to a cross section cut along a short side perpendicular to the second electrode plate.

5. The air-cooled fuel cell stack structure according to claim 1, characterized in that: The heat pipe includes a condensing section, an evaporating section and an insulating section which are integrally formed, and the insulating section is connected to the condensing section and the evaporating section respectively; the evaporating section is arranged in the groove; and the condensing section is connected to the radiator module through a Fin penetration process.

6. The air-cooled fuel cell stack structure according to claim 5, characterized in that: The condensing section is connected to the heat dissipation fins of the radiator module; the heat dissipation fins are aluminum alloy heat dissipation fins.

7. The air-cooled fuel cell stack structure according to claim 1, characterized in that: An inlet manifold is provided at one end of the second electrode plate, and an outlet manifold is provided at the other end; the inlet manifold and the outlet manifold are arranged diagonally.

8. The air-cooled fuel cell stack structure according to claim 1, characterized in that: The air-cooled fuel cell stack structure further includes a heat dissipation fan, which is disposed above the radiator module and at the air outlet side of the air-cooled fuel cell stack structure.

9. The air-cooled fuel cell stack structure according to claim 8, characterized in that: The air-cooled fuel cell stack structure also includes a first end plate, an insulating plate, a first current collecting plate, a second current collecting plate, a second end plate and an air duct shell; the first current collecting plate is arranged at one end of the stack body, and the second current collecting plate is arranged at the other end of the stack body; the insulating plate is arranged on the side of the first current collecting plate away from the stack body; the first end plate abuts the insulating plate; the second end plate is arranged on the side of the second current collecting plate away from the stack body, and the second end plate abuts the air duct shell; the first end plate, the insulating plate, the first current collecting plate, the second current collecting plate, the stack body, the second end plate, the radiator module and the cooling fan are all arranged in the air duct shell.

10. The air-cooled fuel cell stack structure according to claim 9, characterized in that: An air outlet is provided on the side of the air guide cover shell close to the air outlet side, and the heat dissipation fan is arranged in the air outlet; the heat dissipation fan is adapted to be arranged to match the air outlet.

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