A connector for a solid oxide fuel cell and a cell unit

Abstract

The present invention relates to a connector for a solid oxide fuel cell. Through the design of five connecting plates, each connecting plate is easy to process and has a stable structure. The five connecting plates are arranged in sequence to obtain a connecting body with a stable structure. Different reaction atmospheres are formed on both sides of the third connecting plate, and a single connecting body can cooperate with different sides of two single cells. Taking a connecting body and a single cell as a structural unit facilitates the assembly of multi-layer cells and reduces the usage amount of sealing materials on the surface of the stack and around the single cells. The overall stack is supported by a metal connector, improving the mechanical stability of the overall structure of the stack. The stack can maintain long-term stability. The present application also provides a solid oxide fuel cell unit.

Description

Technical Field

[0001] The present invention relates to the field of fuel cells, and particularly to a connector for a solid oxide fuel cell and a battery unit. Background Art

[0002] Solid oxide fuel cells (SOFCs) have the advantages of high energy conversion efficiency and low pollution emissions. They can convert the chemical energy of hydrogen and other hydrocarbon fuels into electrical energy without using precious metal materials. The structures of SOFCs include flat plate type, tubular type, flat tube type, and cone tube type. Among them, the flat plate type and tubular type structures have been studied more. The preparation of tubular SOFCs is relatively complex, while the flat plate type SOFC stacks favored by researchers have advantages such as higher power density and lower manufacturing cost.

[0003] The flat plate type SOFC consists of a metal connector, a sealing material, and a single cell composed of an anode, a cathode, and an electrolyte. The single cell structure is mainly divided into anode-supported type, cathode-supported type, electrolyte-supported type, and metal-supported type. The solid electrolyte is sandwiched between two electrodes, namely the anode and the cathode. The anode has the function of circulating and oxidizing fuel, and usually uses Ni / YSZ cermet composite materials with high electrocatalytic activity and a certain porosity. The electrolyte that plays the role of conducting ions can use YSZ, GDC materials, and the thickness of the electrolyte is usually 20 μm. The cathode material mainly adsorbs and dissociates oxygen, and usually uses materials with a perovskite structure such as LSM.

[0004] A solid oxide fuel cell stack is composed of a unit composed of single cells, sealing materials, and metal connectors stacked repeatedly. Flow channels for fuel and oxygen are formed on both sides of the single cell and the metal connectors on both sides respectively. The gas flows in parallel channels on the surface of the battery and vertically outside the battery. According to the position of the external flow of the battery, the stack structure is mainly divided into two types: external flow chamber and internal flow chamber. The external flow chamber forms channels for transmitting two gases outside the unit stacked by the sealing strip and the sealing material, with the characteristics of low cost, simple structure, and high turbulence efficiency, but it puts higher requirements on the sealing material and assembly pressure, and is not conducive to modular installation and use. The internal flow chamber type stack has less requirements for the amount of sealing material used and is conducive to unit module integration. However, at present, there are problems such as complex overall structure, high manufacturing cost, and lower power density than the external flow chamber type structure due to the relatively thick metal connectors in the internal flow chamber SOFC-related metal connectors and flow channels.

[0005] The thickness, structural complexity, cost, and sealing performance of the SOFC stack need to be further optimized. A reasonable connector design helps to solve these problems. Summary of the Invention

[0006] Based on the above description, the present invention provides a connector for a solid oxide fuel cell to solve the problems of high thickness, poor sealing performance, uneven gas distribution, and great integration difficulty in the integration of a solid oxide fuel cell stack.

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] A connector for a solid oxide fuel cell includes five connecting plates stacked in sequence. Each connecting plate has a first through hole, a second through hole, a third through hole, and a fourth through hole. All the first through holes are sequentially connected to form a cathode gas inlet, all the second through holes are sequentially connected to form an anode gas inlet, all the third through holes are sequentially connected to form a cathode gas outlet, and all the fourth through holes are sequentially connected to form an anode gas outlet;

[0009] The five connecting plates include a first connecting plate, a second connecting plate, a third connecting plate, a fourth connecting plate, and a fifth connecting plate arranged in sequence. The middle parts of the first connecting plate, the second connecting plate, the fourth connecting plate, and the fifth connecting plate have middle through holes. The first through hole, the middle through hole, and the third through hole on the second connecting plate are connected to form a cathode gas flow channel. The second through hole, the middle through hole, and the fourth through hole on the fourth connecting plate are connected to form an anode gas flow channel. The middle plate surface of the third connecting plate completely separates the overlapping parts of the cathode gas flow channel and the anode gas flow channel.

[0010] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0011] The connector provided by the present application is designed with five connecting plates. Each connecting plate is easy to process and has a stable structure. By arranging the five connecting plates in sequence, a connector with a stable structure is obtained, forming different reaction atmospheres on both sides of the third connecting plate. A single connector can cooperate with different sides of two single cells. Taking a connector and a single cell as a structural unit facilitates the assembly of multi-layer cells and reduces the usage amount of sealing materials on the surface of the fuel cell stack and around the single cells. The overall fuel cell stack is supported by the metal connector, improving the mechanical stability of the overall structure of the fuel cell stack. The fuel cell stack can maintain long-term stability.

[0012] On the basis of the above technical solution, the present invention can be further improved as follows.

[0013] Further, the central connection line between the first through hole and the third through hole on each connecting plate is perpendicularly intersected with the central connection line between the second through hole and the fourth through hole.

[0014] Further, grids are formed at the second through hole and the fourth through hole on the fourth connecting plate.

[0015] The present application also provides a solid oxide fuel cell unit, which includes an anode gas flow channel plate, a single cell, a cathode gas flow channel plate, and a connector as described above. The anode gas flow channel plate is disposed at the middle through-hole of the second connecting plate. The single cell is disposed at the middle through-hole of the first connecting plate. The cathode gas flow channel plate is disposed at the middle through-holes of the fourth connecting plate and the fifth connecting plate. When two cell units are stacked vertically, the single cell is clamped between the cathode gas flow channel plate of the upper cell unit and the anode gas flow channel plate of the lower cell unit.

[0016] Further, the anode gas flow channel plate includes nickel foam.

[0017] Further, the cathode gas flow channel plate includes a corrugated plate having a plurality of straight channels arranged at intervals.

[0018] Further, the sum of the thicknesses of the fourth connecting plate and the fifth connecting plate is the same as the thickness of the cathode gas flow channel plate.

[0019] Further, the single cell is an anode-supported solid oxide fuel cell, and the anode-supported solid oxide fuel cell includes a support body and a cell functional layer. The support body is a square porous foam structure. The cell functional layer is located in the middle region of one side surface of the support body. The other side of the support body is disposed close to the anode gas flow channel plate.

[0020] Further, the cell functional layer includes a NiO / YSZ anode functional layer, a YSZ electrolyte layer, and a composite cathode functional layer thin film. The cell functional layer is formed by screen printing.

[0021] Further, the solid oxide fuel cell unit further includes a sealing material for connecting the four peripheral edges of the single cell, the anode gas flow channel plate, and the cathode gas flow channel plate to the corresponding connecting plates. Description of the Drawings

[0022] Figure 1 Schematic diagram of a stack structure composed of a solid oxide fuel cell unit provided by an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the split structure of the connector in this embodiment;

[0024] Figure 3 For Figure 2 Schematic diagram of the first connecting plate in;

[0025] Figure 4 For Figure 2 Schematic diagram of the second connecting plate in;

[0026] Figure 5 ForFigure 2 Schematic diagram of the third connecting plate in

[0027] Figure 6 For Figure 2 Schematic diagram of the fourth connecting plate in

[0028] Figure 7 For Figure 2 Schematic diagram of the fifth connecting plate in

[0029] Figure 8 For Figure 1 Top view structural diagram of a single battery in

[0030] Figure 9 For Figure 8 Cross-sectional schematic diagram of Detailed implementation manners

[0031] For the convenience of understanding this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It can be understood that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawing is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also include other orientations (such as rotating 90 degrees or other orientations), and the spatial description terms used herein are accordingly interpreted.

[0034] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is transmission of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0035] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0036] As Figure 1 and Figure 2 As shown, the present application discloses a stack structure composed of solid oxide fuel cell units. Among them, the ellipsis represents the cyclic stacking of the fuel cell units. The fuel cell unit includes an anode gas flow channel plate 10, a single cell 20, a cathode gas flow channel plate 30 and a connector 40. Among them, the connector 40 is the innovative main body of the fuel cell unit of the present application and determines the basic structure of the entire fuel cell unit. It includes five connecting plates stacked in sequence. Generally, these five connecting plates are all metal plates. Considering the stability of the overall mechanical structure, in this embodiment, square metal plates with the same side length of 200 mm are selected for production.

[0037] Each of these five connecting plates is provided with four through holes near the side edge of each connecting plate, which are sequentially named the first through hole, the second through hole, the third through hole and the fourth through hole in clockwise order. Among them, all the first through holes are sequentially connected to form a cathode gas inlet A, all the second through holes are sequentially connected to form an anode gas inlet B, all the third through holes are sequentially connected to form a cathode gas outlet C, and all the fourth through holes are sequentially connected to form an anode gas outlet D.

[0038] For the convenience of description, as Figures 3 - 7 shown, the five connecting plates are sequentially the first connecting plate 41, the second connecting plate 42, the third connecting plate 43, the fourth connecting plate 44 and the fifth connecting plate 45 according to the setting order. Figure 3 Shows a top view of the first connecting plate 41 in one specific embodiment. Figure 4 Is a top view of the second connecting plate 42. Figure 5 Is a top view of the third connecting plate 43. Figure 6 Is a top view of the fourth connecting plate 44. Figure 7 Is a top view of the fifth connecting plate 45.

[0039] Among them, the first through holes, second through holes, third through holes, and fourth through holes of the first connecting plate 41 are successively the first plate first through hole 41a, the first plate second through hole 41b, the first plate third through hole 41c, and the first plate fourth through hole 41d. Correspondingly, the first through holes, second through holes, third through holes, and fourth through holes of the second connecting plate 42 are successively the second plate first through hole 42a, the second plate second through hole 42b, the second plate third through hole 42c, and the second plate fourth through hole 42d. The first through holes, second through holes, third through holes, and fourth through holes of the third connecting plate 43 are successively the third plate first through hole 43a, the third plate second through hole 43b, the third plate third through hole 43c, and the third plate fourth through hole 43d. The first through holes, second through holes, third through holes, and fourth through holes of the fourth connecting plate 44 are successively the fourth plate first through hole 44a, the fourth plate second through hole 44b, the fourth plate third through hole 44c, and the third plate fourth through hole 44d. The first through holes, second through holes, third through holes, and fourth through holes of the fifth connecting plate 45 are successively the fifth plate first through hole 45a, the fifth plate second through hole 45b, the fifth plate third through hole 45c, and the fifth plate fourth through hole 45d.

[0040] In the middle parts of the first connecting plate 41, the second connecting plate 42, the fourth connecting plate 44, and the fifth connecting plate 45, there are middle through holes successively the first plate middle through hole 41m, the second plate middle through hole 42m, the fourth plate middle through hole 44m, and the fifth plate middle through hole 45m. Among them, the second plate first through hole 42a, the fifth plate middle through hole 42m, and the second plate third through hole 42c are connected to form a cathode gas flow channel, and the fourth plate second through hole 44b, the fourth plate middle through hole 44m, and the fourth plate fourth through hole 44d are connected to form an anode gas flow channel. For a solid oxide fuel cell, cathode air or oxygen, preferably air in this embodiment, and the anode gas is fuel, preferably gas in this embodiment.

[0041] Specifically, in one embodiment, the single cell is a solid oxide fuel cell with a side length of 150 mm. It is placed in the first plate middle through hole 41m. The first plate first through hole 41a, the first plate second through hole 41b, the first plate third through hole 41c, and the first plate fourth through hole 41d are rectangular through holes of the same size. Its width can be 12 - 15 mm, and its length can be 131 - 134 mm. The first plate middle through hole 41m is a square through hole with a side length of 151 - 154 mm. The edges of the edge through holes and the middle through holes are 2 - 3 mm apart. In this embodiment, the width of the rectangular through hole is 14 mm, the length is 132 mm, the side length of the square through hole is 151 mm, and the distance is 2 mm.

[0042] In this embodiment, the single cell is a solid oxide fuel cell with a side length of 150 mm, which is placed in the middle through hole 41m of the first plate. The side length of the middle through hole 41m of the first plate is slightly larger than the side length of the single cell 20, which is convenient for sealing around the single cell. The thicknesses of both the first connecting plate 41 and the single cell 20 are 1 mm.

[0043] Among them, in this embodiment, the single cell 20 is an anode-supported solid oxide fuel cell, such as Figure 8 and 9 shown. It includes a support body 21 and a battery functional layer 22. The support body is a porous foam structure in the shape of a square with a side length of 150 mm. The battery functional layer 22 is located in the middle area of one side of the support body 21, and the other side of the support body 21 is close to the anode gas flow channel plate 10.

[0044] The thickness of the functional layer 22 is generally 20 - 30 μm, which is negligible compared to the thickness of the support body 21. The thickness of the support body 21 is the thickness of the single cell, which is 1 mm. The functional layer 22 is the maximum effective working area of the entire battery. In this embodiment, it is in the shape of a square with a side length of 130 mm. The support body 21 made of Ni-YSZ can be fabricated by the tape casting method. The functional layer 22 specifically includes NiO / YSZ anode functional layer 221, YSZ electrolyte layer 222, and composite cathode functional layer 223 thin films, which are fabricated by the screen printing method.

[0045] The anode gas flow channel is the fuel gas flow channel, which realizes the transmission of fuel gas in the middle of the second connecting plate 42. The overall structure of this flow channel is rectangular. Specifically, the length is 181 - 184 mm, and the width is 131 - 134 mm. In this example, the length is 182 mm, and the width is 132 mm. The width of the central area of the anode gas flow channel is 130 mm, and the anode gas flow channel plate is placed at the position with a length of 150 mm. The blank areas at both ends form the fuel gas circulation inlet and outlet channels. The anode gas flow channel plays the role of transmitting fuel gas and collecting electricity. It can use a metal current collector plate or nickel foam. To achieve the functions of uniform gas flow and current collection, nickel foam is preferably used. The thickness of the nickel foam after being compressed is the same as the thickness of the second connecting plate 42, which is 1 mm.

[0046] The first through hole 42a and the third through hole 42c of the second plate are the air inlet and outlet respectively, and they are of the same size. To facilitate the connection with the adjacent connecting plates, the through hole length of the above-mentioned second connecting plate 42 is slightly smaller than that of the first connecting plate 41, which is 131 - 133 mm, and the width is 12 - 14 mm. In this embodiment, the length is 131 m, and the width is 13 mm.

[0047] The support part of the anode-supported solid oxide fuel cell can be located at the step formed by the first connecting plate 41 and the second connecting plate 42, playing the role of supporting the single cell.

[0048] The four through-holes of the third connecting plate 43 are rectangular gas channels with the same cross-sectional size. The middle part of the third connecting plate 43 divides the entire connecting body 4 into two parts with different atmosphere environments and plays a supporting role for the entire battery unit. The upper part includes the first connecting plate 41 and the second connecting plate 42, which provide assembly positions for the single cell 20 and its anode gas flow channel plate. The lower part includes the fourth connecting plate 44 and the fifth connecting plate 45, which provide assembly positions for the single cell 20 and the cathode gas flow channel plate 30 of the battery unit on the lower side of the connecting body 4. Among them, the first through-hole 43a of the third plate and the third through-hole 43c of the third plate are the air or oxygen inlet and outlet channels, and the second through-hole 43b of the third plate and the fourth through-hole 43d of the third plate are the fuel gas inlet and outlet channels. Considering the supporting role of the third connecting plate 43, its thickness is 1.0 mm. For convenient connection, the size of its rectangular through-hole needs to be slightly smaller than the air channel of the second connecting plate 42. Its width can be selected as 12 mm, the length can be selected as 130 mm, and the side length of the middle entity is not less than 156 mm, which is suitable for placing a single cell with a side length of 150 mm and the air channel support edge metal, and completely separates the overlapping part of the cathode gas flow channel and the anode gas flow channel.

[0049] The fourth connecting plate 44 has an axisymmetric structure, similar to the second connecting plate 42. Grids are arranged at the positions of the first through-hole 44a of the fourth plate and the third through-hole 44c of the fourth plate. The gaps between the grids are evenly arranged and connected to the middle through-hole 44m of the fourth plate. The width of the thin strips of the grid is 2 mm, the width of the gaps between the strips is 12 mm, and the length of the thin strips satisfies being greater than the width of the air channel and accommodating the cathode gas flow channel 30, and the length can be selected as 25 mm. The grid plays a role in sharing the internal pressure of the battery to the edge of the connecting body 4 and evenly transmitting oxygen. The position where the cathode gas flow channel plate 30, which is square with a side length of 130 mm from the top view angle, is located at the first through-hole 44a of the fourth plate and the third through-hole 44c of the fourth plate. The first through-hole 44a of the fourth plate and the third through-hole 44c of the fourth plate are the air channels between different connecting plates, and the second through-hole 44b of the fourth plate and the fourth through-hole 44d of the third plate are rectangular channels for the gas to flow between the plates, with a length of 130 mm and a width of 10 mm.

[0050] The hollow part of the fifth connecting plate 45 is a square with a side length of 130 cm, which is used to place the cathode gas flow channel plate 30 with a side length of 130 mm and facilitate sealing. The sizes of the rectangular channels around the square are the same, with a length of 131 mm and a width of 11 mm, slightly larger than the air channel size on the fourth connecting plate 4 of the fourth layer. The sum of the thicknesses of the fourth connecting plate 44 and the fifth connecting plate 45 must be consistent with the cathode gas flow channel plate 10. For example, they can both be selected as 0.5 mm, and the thickness of the cathode gas flow channel plate 30 is 1.0 mm. Through the design of the hollow parts of the fourth connecting plate 44 and the fifth connecting plate 45, the air inlet and outlet are connected, realizing the entry of oxygen or air into the center of the cathode side at this fourth layer and the overall transmission in the cathode gas flow channel plate 30.

[0051] The cathode gas flow channel plate 30 can be a corrugated plate current collector made by rolling forming, a metal connecting plate, or nickel foam. In this embodiment, it is preferably a corrugated plate current collector with a number of spaced direct flow channels. The connecting plates are sealed by welding. Sealing materials are provided at the joints between the four peripheral edges of the single cell, the anode gas flow channel plate, and the cathode gas flow channel plate and the corresponding connecting plates to ensure the sealing of the battery unit.

[0052] When two battery units are stacked one above the other, the single cell 20 is clamped between the cathode gas flow channel plate 30 of the upper battery unit and the anode gas flow channel plate 10 of the lower battery unit.

[0053] When the solid oxide fuel cell unit provided in this embodiment is in use, different battery units are stacked and fixed in sequence to form a solid oxide fuel cell stack. On the cathode side, air enters the interior of the stack from the cathode gas inlet A. In each battery unit, it sequentially passes through the first connecting plate 41, the second connecting plate 42, and the third connecting plate 43, and enters the cathode gas flow channel plate 30 along the gap part of the grid on the side of the first through hole 44a of the fourth plate of the fourth connecting plate 44, and passes through the cathode gas flow channel. The remaining gas flows out from the grid of the third through hole 44c of the fourth plate on the opposite side, and then flows out from the cathode gas outlet C; on the anode side, the fuel gas enters the interior of the stack from the anode gas inlet B. In each battery unit, it passes through the first connecting plate 41, and enters the anode gas flow channel plate 10 along the slit formed by the anode gas flow channel at the second through hole 42b of the second plate of the second connecting plate 42 and participates in the reaction; the remaining fuel gas passes through the fourth through hole 42d of the second plate on the opposite side, and then flows out from the anode gas outlet D.

[0054] In summary, this embodiment provides a solid oxide fuel cell unit, which includes a connecting body 4 structure. The connecting body 4 includes five metal plates of the same size with slightly different thicknesses and styles. The five connecting plates form a structurally stable metal connecting body through orderly stacking. A single metal connecting body can cooperate with different sides of two single cells 20. Taking a metal connecting body and a single cell 20 as a structural unit facilitates the assembly of multi-layer batteries and reduces the usage amount of the sealing materials on the surface of the stack and around the single cell 20. By supporting the overall stack with the metal connecting body, the mechanical stability of the overall structure of the stack is improved, enabling the stack to maintain long-term stability.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A connector for a solid oxide fuel cell, characterized in that, it includes five connecting plates stacked in sequence. Each connecting plate has a first through-hole, a second through-hole, a third through-hole, and a fourth through-hole. All the first through-holes are sequentially connected to form a cathode gas inlet, all the second through-holes are sequentially connected to form an anode gas inlet, all the third through-holes are sequentially connected to form a cathode gas outlet, and all the fourth through-holes are sequentially connected to form an anode gas outlet; the five connecting plates include a first connecting plate, a second connecting plate, a third connecting plate, a fourth connecting plate, and a fifth connecting plate arranged in sequence. The middle parts of the first connecting plate, the second connecting plate, the fourth connecting plate, and the fifth connecting plate have middle through-holes. The first through-hole, the middle through-hole, and the third through-hole on the second connecting plate are connected to form a cathode gas flow channel. The second through-hole, the middle through-hole, and the fourth through-hole on the fourth connecting plate are connected to form an anode gas flow channel. The middle plate surface of the third connecting plate completely separates the overlapping part of the cathode gas flow channel and the anode gas flow channel; grids are formed at the second through-hole and the fourth through-hole on the fourth connecting plate.

2. The connector for a solid oxide fuel cell according to claim 1, characterized in that, the center connection line of the first through-hole and the third through-hole on each connecting plate is perpendicular to the center connection line of the second through-hole and the fourth through-hole.

3. A solid oxide fuel cell unit, characterized in that, it includes an anode gas flow channel plate, a single cell, a cathode gas flow channel plate, and the connector according to claim 1. The anode gas flow channel plate is arranged at the middle through-hole of the second connecting plate. The single cell is arranged at the middle through-hole of the first connecting plate. The cathode gas flow channel plate is arranged at the middle through-holes of the fourth connecting plate and the fifth connecting plate; when two cell units are stacked up and down, the single cell is clamped between the cathode gas flow channel plate of the upper cell unit and the anode gas flow channel plate of the lower cell unit.

4. The solid oxide fuel cell unit according to claim 3, characterized in that, the anode gas flow channel plate includes nickel foam.

5. The solid oxide fuel cell unit according to claim 3, characterized in that, the cathode gas flow channel plate includes a corrugated plate having a number of spaced direct flow channels.

6. The solid oxide fuel cell unit according to claim 5, characterized in that, the sum of the thicknesses of the fourth connecting plate and the fifth connecting plate is the same as the thickness of the cathode gas flow channel plate.

7. The solid oxide fuel cell unit according to claim 3, characterized in that, the single cell is an anode-supported solid oxide fuel cell. The anode-supported solid oxide fuel cell includes a support body and a cell functional layer. The support body is a square porous foam structure. The cell functional layer is located in the middle area of one side surface of the support body. The other side of the support body is close to the anode gas flow channel plate.

8. The solid oxide fuel cell unit according to claim 7, characterized in that, The battery functional layer includes a NiO / YSZ anode functional layer, a YSZ electrolyte layer, and a composite cathode functional layer thin film, and the battery functional layer is made by screen printing.

9. The solid oxide fuel cell unit according to claim 4, wherein, the solid oxide fuel cell unit further includes a sealing material for the connection between the four peripheral edges of the single cell, the anode gas flow channel plate, the cathode gas flow channel plate, and the corresponding connection plate.

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