Gas distribution structure for a solid oxide fuel cell stack

Abstract

The utility model provides a kind of gas distribution structure of solid oxide fuel cell stack, it is related to power generation system technical field, to solve the technical problems that stack arrangement mode in prior art leads to inconsistent stress of electric pile, there is larger temperature gradient, uneven gas in and out, produce larger space waste etc., applicable to the power generation and electrolysis of solid oxide fuel cell;A kind of gas distribution structure of solid oxide fuel cell stack, including gas distribution plate and several electric piles, cathode gas inlet, cathode gas outlet, anode gas inlet and anode gas outlet are equipped in gas distribution plate, cathode gas inlet, cathode gas outlet, anode gas inlet and anode gas outlet are respectively formed cathode gas inlet, cathode gas outlet, anode gas inlet and anode gas outlet on the upper end surface of gas distribution plate;Several electric piles are arrayed horizontally distributed on the upper end surface of gas distribution plate and are communicated with cathode gas inlet, cathode gas outlet, anode gas inlet and anode gas outlet respectively by first, second cathode gas port and first, second anode gas port.

Description

Technical Field

[0001] This utility model relates to the field of power generation system technology, specifically to a gas distribution structure for a solid oxide fuel cell stack. Background Technology

[0002] Solid oxide fuel cell (SOFC) power generation systems are primarily used for stationary power generation, typically employing a scheme where the fuel cell stacks and balance sheet operation (BOP) are separately packaged and arranged in separate zones. The complex arrangement of the cathode and anode gas inlet / outlet pipelines between the individual stacks and the system BOP results in significant space wastage between the stacks, leading to relatively low volumetric and gravimetric power densities. Currently, fuel cell stacks commonly employ a stacked arrangement of multiple stacks to increase power output within a limited footprint. However, this traditional stacked arrangement has a series of inherent and interconnected drawbacks: First, the upper stacks are pressed on top of the lower stacks, resulting in greater stress on the lower stacks and less stress on the upper stacks, leading to inconsistent stress across the stacks and affecting their reliability and lifespan. Second, due to factors such as rising hot airflow, there is a significant temperature gradient within the stack, causing poor output power consistency among stacks in different locations, thus reducing the overall system's power generation efficiency. Third, the complex gas inlet and outlet pipelines for each stack can easily lead to uneven gas inlet and outlet, resulting in inconsistent output power across stacks in different spatial locations. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a gas distribution structure for solid oxide fuel cell stacks, thereby solving technical problems such as inconsistent stack stress, large temperature gradients, uneven gas inlet and outlet, and significant space waste caused by the stack arrangement in existing technologies.

[0004] To solve the above-mentioned technical problems, this utility model provides a gas distribution structure for a solid oxide fuel cell stack, comprising: A gas distribution plate is provided with at least one cathode inlet, at least one cathode outlet, at least one anode inlet, and at least one anode outlet. Each cathode inlet, cathode outlet, anode inlet, and anode outlet forms at least one cathode inlet, at least one cathode outlet, at least one anode inlet, and at least one anode outlet on the upper surface of the gas distribution plate. The number of cathode inlets, cathode outlets, anode inlets, and anode outlets is several and the same. Several fuel cells are provided, each with a first cathode gas port, a second cathode gas port, a first anode gas port and a second anode gas port at its bottom end. The fuel cells are arranged in an array and horizontally distributed on the upper surface of the gas distribution plate. Each fuel cell is connected to the gas distribution plate through a connecting component. The first cathode gas port, the second cathode gas port, the first anode gas port and the second anode gas port of each fuel cell are respectively connected to a cathode gas inlet, a cathode gas outlet, an anode gas inlet and an anode gas outlet.

[0005] With the above structure, the gas distribution structure of this utility model for a solid oxide fuel cell stack has the following advantages: By setting a gas distribution plate with internally integrated cathode and anode inlet and outlet gas channels, and fixing several fuel cell stacks horizontally distributed in an array on it, the traditional top-and-bottom stacking method is fundamentally eliminated, so that all fuel cell stacks are on the same horizontal plane, the stress is uniform, the risk of the bottom fuel cell stack being crushed is avoided, the mechanical reliability and overall life of each fuel cell stack are significantly improved, and the maintainability is better, and the replacement of a single fuel cell stack can be convenient if a single fuel cell stack fails; at the same time, the temperature gradient caused by height difference is eliminated, and with the gas channels integrated inside the gas distribution plate, the temperature of the reaction gas delivered to each fuel cell stack is more consistent. To ensure uniformity and better uniformity of intake and exhaust, the output power of each stack is consistent, resulting in better overall stack performance. Furthermore, integrating complex intake and exhaust pipelines into a single gas distribution plate greatly simplifies the system structure and reduces external winding pipeline connections. This not only reduces gas flow resistance and ensures uniformity of intake and exhaust for each stack, but also significantly improves the system's space utilization, reduces space waste, and makes the stack structure more compact. This effectively improves the system's volumetric power density and gravimetric power density, increasing power within a limited footprint. This lays the foundation for the application of SOFC systems in mobile scenarios such as automobiles and is suitable for power generation and electrolysis of solid oxide fuel cells.

[0006] As an improvement, the gas distribution plate is provided with several installation areas equidistantly along its length. Each installation area has a cathode inlet, a cathode outlet, an anode inlet, and an anode outlet. Below each cathode inlet, cathode outlet, anode inlet, and anode outlet, there is a cathode inlet channel, a cathode outlet channel, an anode inlet channel, and an anode outlet channel, respectively. All cathode inlets, cathode outlets, anode inlets, and anode outlets are arranged along the width of the gas distribution plate and form openings on the side wall of the gas distribution plate. Each installation area is connected to a fuel cell stack. This structure further limits the gas channel layout of the gas distribution plate, providing each fuel cell stack with an independent gas channel extending along its width. This enables precise and independent control of the gas supply to each fuel cell stack, minimizing mutual interference when the gas flows through different fuel cell stacks. This fundamentally ensures a high degree of uniformity in the inlet pressure and flow rate of all fuel cell stacks, greatly optimizing the consistency of performance between fuel cell stacks.

[0007] As an improvement, the valve plate has at least one row of installation areas along its width. Each row of installation areas includes several installation areas equidistantly arranged along the length of the valve plate. Each installation area has one cathode inlet, one cathode outlet, one anode inlet, and one anode outlet. All cathode inlets, cathode outlets, anode inlets, and anode outlets in the same row of installation areas are connected to the same cathode inlet channel, cathode outlet channel, anode inlet channel, and anode outlet channel, respectively. The cathode inlet channel, cathode outlet channel, anode inlet channel, and anode outlet channel are all arranged along the length of the valve plate and form openings on the side wall of the valve plate. Each installation area is connected to an electrode stack. This structure reduces the total number of gas channels required inside the valve plate and simplifies the complexity of the internal structure of the valve plate.

[0008] As an improvement, the gas distribution plate has two rows of installation areas along its width. Each row of installation areas has one cathode inlet and one anode inlet. The cathode inlet and anode inlet are located below several cathode inlets and several anode inlets, respectively. All cathode outlets in the two rows of installation areas are connected to the same cathode outlet, and all anode outlets in the two rows of installation areas are connected to the same anode outlet. The cathode outlet and anode outlet are located between the two rows of installation areas. With this structure, the symmetrical layout allows the cathode and anode gases to enter from both sides and finally be discharged from the common outlet in the middle. The airflow path is more reasonable and smooth, and the flow resistance distribution is symmetrical and balanced, which helps to further reduce the gas distribution difference between the two rows of fuel cells and improve the overall performance uniformity of the fuel cell stack. Secondly, this centralized arrangement of outlets makes exhaust gas collection and management more convenient, and makes the fuel cell stack structure more compact and efficient.

[0009] As an improvement, the connection assembly includes several double-ended studs and several fixing nuts. One end of the double-ended stud is threaded to the gas distribution plate, and the other end passes through the fuel cell stack and is threaded to the fixing nut. With this structure, the clamping force on the fuel cell stack can be easily applied and adjusted through the cooperation of the double-ended studs and fixing nuts, ensuring that the sealing surface between each fuel cell stack and the gas distribution plate is subjected to uniform and stable force. At the same time, this connection method is easy to disassemble and reassemble. When a fuel cell stack fails, it can be removed and replaced relatively easily, which greatly improves the maintainability of the stack and reduces the cost and time of later operation and maintenance.

[0010] As an improvement, the fuel cell stack includes a first pressure plate, a first conductive plate, a first mica plate, a core, a second conductive plate, a second mica plate, and a second pressure plate stacked sequentially from top to bottom. The core, the second conductive plate, the second mica plate, and the second pressure plate are all vertically perforated with a first cathode gas channel, a second cathode gas channel, a first anode gas channel, and a second anode gas channel. The bottom end of the second pressure plate forms a first cathode gas port, a second cathode gas port, a first anode gas port, and a second anode gas port. The fuel cell stack also includes several tie rods and several fixing bolts. The tie rods are located between the first pressure plate and the second pressure plate, and both ends of the tie rods are fixed to the first pressure plate and the second pressure plate respectively by fixing bolts.

[0011] As an improvement, each fuel cell stack is connected to the gas distribution plate with a sealing gasket. The sealing gasket is arranged around the first cathode gas port, the second cathode gas port, the first anode gas port, and the second anode gas port. With this structure, the sealing gasket can effectively fill the microscopic unevenness between the bottom of the fuel cell stack and the gas distribution plate, forming a reliable sealing interface and preventing the cathode and anode gases from leaking into each other or outwards under high pressure.

[0012] As an improvement, adjacent fuel cells are connected by a conductive connecting plate along the length of the gas distribution plate. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the gas distribution plate in Embodiment 1 of this utility model.

[0015] Figure 3 This is a side view of Embodiment 1 of the present utility model.

[0016] Figure 4 for Figure 3 Cross-sectional view of section AA.

[0017] Figure 5 for Figure 3 Cross-sectional view of the middle BB section.

[0018] Figure 6 This is an exploded structural diagram of the fuel cell stack in Embodiment 1 of this utility model.

[0019] Figure 7 This is a schematic diagram of the bottom end of the fuel cell stack in Embodiment 1 of this utility model.

[0020] Figure 8 This is a three-dimensional structural diagram of the gas distribution plate in Embodiment 2 of this utility model.

[0021] Figure 9 This is a cross-sectional view of the gas distribution plate in Embodiment 2 of this utility model.

[0022] Reference numerals: 1. Gas distribution plate; 2. Cathode inlet; 3. Cathode outlet; 4. Anode inlet; 5. Anode outlet; 6. Cathode inlet; 7. Cathode outlet; 8. Anode inlet; 9. Anode outlet; 10. Fuel cell stack; 101. First pressure plate; 102. First conductive plate; 103. First mica plate; 104. Core; 105. Second conductive plate; 106. Second mica plate; 107. Second pressure plate; 108. Tie rod; 109. Fixing bolt; 11. First cathode gas port; 12. Second cathode gas port; 13. First anode gas port; 14. Second anode gas port; 15. Connecting assembly; 151. Double-ended stud; 152. Fixing nut; 16. First cathode gas channel; 17. Second cathode gas channel; 18. First anode gas channel; 19. Second anode gas channel; 20. Sealing gasket; 21. Conductive connecting plate. Detailed Implementation

[0023] The gas distribution structure of a solid oxide fuel cell stack according to this utility model will be described in detail below with reference to the accompanying drawings.

[0024] Example 1: As Figures 1 to 7 As shown, a gas distribution structure for a solid oxide fuel cell stack includes a gas distribution plate 1 and several stacks 10. The gas distribution plate 1 is provided with at least one cathode inlet 2, at least one cathode outlet 3, at least one anode inlet 4 and at least one anode outlet 5. Each cathode inlet 2, cathode outlet 3, anode inlet 4 and anode outlet 5 forms at least one cathode inlet 6, at least one cathode outlet 7, at least one anode inlet 8 and at least one anode outlet 9 on the upper end face of the gas distribution plate 1. The number of cathode inlets 6, cathode outlets 7, anode inlets 8 and anode outlets 9 are all several and the number is the same.

[0025] like Figure 7 As shown, each fuel cell stack 10 has a first cathode gas port 11, a second cathode gas port 12, a first anode gas port 13, and a second anode gas port 14 at its bottom. Several fuel cell stacks 10 are horizontally arranged in an array on the upper surface of the gas distribution plate 1. Each fuel cell stack 10 is connected to the gas distribution plate 1 via a connecting assembly 15. The first cathode gas port 11, the second cathode gas port 12, the first anode gas port 13, and the second anode gas port 14 of each fuel cell stack 10 are respectively connected to a cathode gas inlet 6, a cathode gas outlet 7, an anode gas inlet 8, and an anode gas outlet 9. Specifically, the first cathode gas port 11, the second cathode gas port 12, the first anode gas port 13, and the second anode gas port 14 at the bottom of the fuel cell stack 10 are as follows: Figure 7 As shown, the first cathode gas port 11 and the second cathode gas port 12 are arranged opposite to each other, and the first anode gas port 13 and the second anode gas port 14 are arranged opposite to each other.

[0026] In this embodiment, as Figure 2 As shown, the gas distribution plate 1 has at least one row of installation areas along its width direction. Each row of installation areas includes several installation areas equidistantly arranged along the length direction of the gas distribution plate 1. Each installation area has a cathode inlet 6, a cathode outlet 7, an anode inlet 8, and an anode outlet 9. All cathode inlets 6, cathode outlets 7, anode inlets 8, and anode outlets 9 in the same row of installation areas are connected to the same cathode inlet channel 2, the same cathode outlet channel 3, the same anode inlet channel 4, and the same anode outlet channel 5, respectively. The cathode inlet channel 2, cathode outlet channel 3, anode inlet channel 4, and anode outlet channel 5 are all arranged along the length direction of the gas distribution plate 1 and form openings on the side wall of the gas distribution plate 1. Each installation area is connected to an electric stack 10.

[0027] Furthermore, such as Figures 2 to 5 As shown, the gas distribution plate 1 has two rows of installation areas along its width. Each row of installation areas has a cathode inlet 2 and an anode inlet 4. The cathode inlet 2 and the anode inlet 4 are located below several cathode inlets 6 and several anode inlets 8, respectively. All cathode outlets 7 in the two rows of installation areas are connected to the same cathode outlet 3. All anode outlets 9 in the two rows of installation areas are connected to the same anode outlet 5. The cathode outlet 3 and the anode outlet 5 are located between the two rows of installation areas.

[0028] Specific reference Figure 4 and Figure 5 In order to avoid interference with the cathode inlet 2, the anode inlet 4 is bent near the opening, while the cathode outlet 3 is located below the anode outlet 5. The openings of the cathode inlet 2 and the anode inlet 4 are on the same side, and the openings of the cathode outlet 3 and the anode outlet 5 are on the same side.

[0029] like Figure 7 As shown, each fuel cell stack 10 is connected to the gas distribution plate 1 by a sealing gasket 20. The sealing gasket 20 is arranged around the first cathode gas port 11, the second cathode gas port 12, the first anode gas port 13, and the second anode gas port 14. Specifically, through holes are opened on the sealing gasket 20 corresponding to the first cathode gas port 11, the second cathode gas port 12, the first anode gas port 13, and the second anode gas port 14, respectively.

[0030] like Figure 1 As shown, the connecting assembly 15 includes several double-ended studs 151 and several fixing nuts 152. One end of the double-ended stud 151 is threadedly connected to the gas distribution plate 1, and the other end of the double-ended stud 151 passes through the fuel cell stack 10 and is threadedly connected to the fixing nut 152.

[0031] This invention fundamentally eliminates the traditional stacking method by setting up a gas distribution plate 1 with internally integrated cathode and anode inlet and outlet gas channels, and fixing several fuel cell stacks 10 in an array-like horizontal distribution on it. This ensures that all fuel cell stacks 10 are on the same horizontal plane and only bear the vertical clamping force from the connecting component 15, resulting in uniform force distribution and avoiding the risk of damage to the bottom fuel cell stacks 10. This significantly improves the mechanical reliability and overall lifespan of each fuel cell stack 10, and also improves maintainability, allowing for easy replacement of a faulty individual fuel cell stack 10. Simultaneously, it eliminates the temperature gradient caused by height differences, and in conjunction with the gas channels integrated inside the gas distribution plate 1, ensures that the air delivered to each fuel cell stack 10 is evenly distributed. The more uniform gas temperature and better uniformity of intake and exhaust ensure the consistency of output power of each fuel cell stack 10, resulting in better overall stack performance. Furthermore, integrating the complex intake and exhaust pipelines into a single gas distribution plate 1 greatly simplifies the system structure and reduces external winding pipeline connections. This not only reduces gas flow resistance and ensures the uniformity of intake and exhaust of each fuel cell stack 10, but also significantly improves the system's space utilization, reduces space waste, and makes the stack structure more compact. This effectively improves the system's volumetric power density and weight power density, increasing power within a limited footprint and laying the foundation for the application of SOFC systems in mobile scenarios such as automobiles.

[0032] In this embodiment, the total number of gas ducts required inside the gas distribution plate 1 is reduced, simplifying the complexity of the internal structure of the gas distribution plate 1. The symmetrical layout allows the cathode and anode gases to enter from both sides and finally be discharged from the common gas outlet in the middle. The airflow path is more reasonable and smooth, and the flow resistance distribution is symmetrical and balanced, which helps to further reduce the gas distribution difference between the two rows of fuel cell stacks 10 and improve the overall performance uniformity of the stack. Secondly, this centralized arrangement of gas outlets makes exhaust gas collection and management more convenient, and makes the stack structure more compact and efficient.

[0033] like Figure 6As shown, the fuel cell stack 10 includes a first pressure plate 101, a first conductive plate 102, a first mica plate 103, a core 104, a second conductive plate 105, a second mica plate 106, and a second pressure plate 107 stacked sequentially from top to bottom. A first cathode gas channel 16, a second cathode gas channel 17, a first anode gas channel 18, and a second anode gas channel 19 are vertically penetrating the core 104, the second conductive plate 105, the second mica plate 106, and the second pressure plate 107. These first cathode gas channels 16, second cathode gas channels 17, first anode gas channels 18, and second anode gas channels 19 are respectively corresponding to and connected to each other. The bottom end of the second pressure plate 107 forms a first cathode gas port 11, a second cathode gas port 12, a first anode gas port 13, and a second anode gas port 14. The fuel cell stack 10 also includes several tie rods 108 and several fixing bolts 109. The tie rods 108 are located between the first pressure plate 101 and the second pressure plate 107, and both ends of the tie rods 108 are fixed to the first pressure plate 101 and the second pressure plate 107 respectively by fixing bolts 109. Specifically, the first pressure plate 101 and the second pressure plate 107 are each provided with four protrusions for connecting the fixing bolts 109, and the upper end of the double-ended stud 151 is connected to the first pressure plate 101. Adjacent fuel cell stacks 10 along the length of the gas distribution plate 1 are connected by a conductive connecting plate 21.

[0034] The system BOP reforming + hydrogen-rich gas (anode gas) heated to a certain temperature and air heated to a certain temperature (cathode gas) are distributed to each fuel cell stack 10. The cathode and anode gases generate electrical energy through electrochemical reactions within the fuel cell stack 10, and water is generated at the anode. The remaining cathode and anode gases are discharged from the stack group through the gas distribution plate 1.

[0035] Example 2: Figures 8 to 9 As shown, the gas distribution structure of a solid oxide fuel cell stack differs from that of Embodiment 1 in that the gas distribution plate 1 has several installation areas equidistantly arranged along its length. Each installation area has a cathode inlet 6, a cathode outlet 7, an anode inlet 8, and an anode outlet 9. Below each cathode inlet 6, cathode outlet 7, anode inlet 8, and anode outlet 9, there is a cathode inlet channel 2, a cathode outlet channel 3, an anode inlet channel 4, and an anode outlet channel 5, respectively. All cathode inlets 2, cathode outlet channels 3, anode inlets 4, and anode outlet channels 5 are arranged along the width of the gas distribution plate 1 and form openings on the side wall of the gas distribution plate 1. Each installation area is connected to a fuel cell stack 10.

[0036] In this embodiment, the gas distribution plate 1 is further defined to provide each fuel cell stack 10 with an independent gas channel that extends along the width direction. This enables precise and independent control of the gas supply to each fuel cell stack 10, minimizing mutual interference when the gas flows through different fuel cell stacks 10. This fundamentally ensures the high uniformity of the inlet pressure and flow rate of all fuel cell stacks 10, and greatly optimizes the consistency of performance among fuel cell stacks 10.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the two embodiments described above. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A gas distribution structure for a solid oxide fuel cell stack, characterized in that, include: A gas distribution plate (1) is provided with at least one cathode inlet channel (2), at least one cathode outlet channel (3), at least one anode inlet channel (4) and at least one anode outlet channel (5). Each cathode inlet channel (2), each cathode outlet channel (3), each anode inlet channel (4) and each anode outlet channel (5) forms at least one cathode inlet port (6), at least one cathode outlet port (7), at least one anode inlet port (8) and at least one anode outlet port (9) on the upper end face of the gas distribution plate (1). The number of cathode inlets (6), cathode outlet ports (7), anode inlets (8) and anode outlet ports (9) are all several and the number is the same. A plurality of fuel cells (10) are provided at the bottom of each fuel cell (10) with a first cathode gas port (11), a second cathode gas port (12), a first anode gas port (13) and a second anode gas port (14). The plurality of fuel cells (10) are arranged in an array horizontally on the upper surface of the gas distribution plate (1). Each fuel cell (10) is connected to the gas distribution plate (1) through a connecting component (15). The first cathode gas port (11), the second cathode gas port (12), the first anode gas port (13) and the second anode gas port (14) of each fuel cell (10) are respectively connected to a cathode gas inlet (6), a cathode gas outlet (7), an anode gas inlet (8) and an anode gas outlet (9).

2. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, The gas distribution plate (1) is provided with several installation areas at equal intervals along its length. Each installation area is provided with a cathode inlet (6), a cathode outlet (7), an anode inlet (8), and an anode outlet (9). Below each cathode inlet (6), cathode outlet (7), anode inlet (8), and anode outlet (9) is provided a cathode inlet channel (2), a cathode outlet channel (3), an anode inlet channel (4), and an anode outlet channel (5). All cathode inlets (2), cathode outlet channels (3), anode inlets (4), and anode outlet channels (5) are arranged along the width of the gas distribution plate (1) and form openings on the side wall of the gas distribution plate (1). Each installation area is connected to a fuel cell stack (10).

3. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, The gas distribution plate (1) is provided with at least one row of installation areas along the width direction. Each row of installation areas includes several installation areas equidistantly arranged along the length direction of the gas distribution plate (1). Each installation area is provided with a cathode inlet (6), a cathode outlet (7), an anode inlet (8), and an anode outlet (9). All cathode inlets (6), cathode outlets (7), anode inlets (8), and anode outlets (9) in the same row of installation areas are connected to the same cathode inlet channel (2), the same cathode outlet channel (3), the same anode inlet channel (4), and the same anode outlet channel (5). The cathode inlet channel (2), cathode outlet channel (3), anode inlet channel (4), and anode outlet channel (5) are all arranged along the length direction of the gas distribution plate (1) and form openings on the side wall of the gas distribution plate (1). Each installation area is connected to a fuel cell stack (10).

4. The gas distribution structure of the solid oxide fuel cell stack according to claim 3, characterized in that, The gas distribution plate (1) has two rows of installation areas along its width. Each row of installation areas has a cathode air inlet (2) and an anode air inlet (4). The cathode air inlet (2) and the anode air inlet (4) are located below several cathode air inlets (6) and several anode air inlets (8), respectively. All cathode air outlets (7) in the two rows of installation areas are connected to the same cathode air outlet (3). All anode air outlets (9) in the two rows of installation areas are connected to the same anode air outlet (5). The cathode air outlet (3) and the anode air outlet (5) are located between the two rows of installation areas.

5. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, The connecting assembly (15) includes several double-ended studs (151) and several fixing nuts (152). One end of the double-ended studs (151) is threaded to the gas distribution plate (1), and the other end of the double-ended studs (151) passes through the fuel cell stack (10) and is threaded to the fixing nuts (152).

6. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, The fuel cell stack (10) includes a first pressure plate (101), a first conductive plate (102), a first mica plate (103), a core (104), a second conductive plate (105), a second mica plate (106), and a second pressure plate (107) stacked sequentially from top to bottom. The core (104), the second conductive plate (105), the second mica plate (106), and the second pressure plate (107) are all vertically perforated with a first cathode gas channel (16), a second cathode gas channel (17), a first anode gas channel (18), and a second anode gas channel (19). The bottom end of the second pressure plate (107) forms the first cathode gas port (11), the second cathode gas port (12), the first anode gas port (13) and the second anode gas port (14). The fuel cell stack (10) also includes a plurality of pull rods (108) and a plurality of fixing bolts (109). The plurality of pull rods (108) are located between the first pressure plate (101) and the second pressure plate (107), and the two ends of the pull rods (108) are respectively fixed to the first pressure plate (101) and the second pressure plate (107) by the fixing bolts (109).

7. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, Each of the fuel cell stacks (10) is connected to the gas distribution plate (1) by a sealing gasket (20), which surrounds the first cathode gas port (11), the second cathode gas port (12), the first anode gas port (13), and the second anode gas port (14).

8. The gas distribution structure of the solid oxide fuel cell stack according to claim 1, characterized in that, Adjacent fuel cells (10) along the length of the gas distribution plate (1) are connected by a conductive connecting plate (21).

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