A planar solid oxide fuel cell single cell test fixture

Abstract

This invention discloses a flat-plate solid oxide fuel cell single-cell test fixture, comprising: a cathode end plate with a circular first protrusion fixed thereon, and a gas distribution mesh disposed on the first protrusion; an anode end plate with a second protrusion fixed thereon, and a gas distribution mesh disposed on the second protrusion; a battery cell disposed between the cathode and anode end plates; a current collector network with two sets; a sealing assembly disposed between the cathode and anode end plates, with the battery cell disposed within the sealing assembly; and a fastening assembly for securing the cathode and anode end plates. In this invention, the gas distribution meshes on the cathode and anode end plates are used for air gas distribution and circulation and fuel gas gas distribution and circulation, respectively, which not only increases the effective contact area between the reactant gas and the single cell but also ensures a high gas flow rate, fully utilizing the performance of the single cell.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a planar solid oxide fuel cell single-cell test fixture. Background Technology

[0002] Solid oxide fuel cells (SOFCs), as a third-generation fuel cell, are devices that convert chemical energy into electrical energy. Due to their high conversion efficiency, flexible reactant gases, and low environmental pollution, they have attracted considerable public attention.

[0003] The steady-state output voltage of a single SOFC cell is around 1V, which necessitates connecting several cells in series to achieve a higher output voltage. According to Kelvin's law, each cell in a series connection must generate the same total current. For a series-connected stack, the worst-performing cell significantly impacts the overall performance of the stack. Therefore, electrochemical testing of SOFC cells is essential.

[0004] During SOFC single-cell testing, fuel gas is introduced to the anode side, and oxygen or air is introduced to the cathode side. Electrochemical processes occur on the anode and cathode surfaces of the gases on both sides of the cell, enabling the device to supply power. As a device that converts chemical energy into electrical energy, the energy conversion efficiency depends on the effective contact area between the reactant gases and the cell electrodes. Poor gas flow design reduces the effective contact area between the reactant gases and the cell electrodes, not only lowering the overall energy conversion efficiency but also causing excessive leakage of reactant gases and contaminating the testing environment. However, existing medium-sized SOFC single-cell testing devices still suffer from gas flow problems.

[0005] To address the aforementioned technical issues, this invention provides a planar solid oxide fuel cell single-cell test fixture. Summary of the Invention

[0006] The purpose of this invention is to provide a planar solid oxide fuel cell single-cell test fixture to solve the problems existing in the prior art.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a planar solid oxide fuel cell single-cell test fixture, comprising:

[0008] A cathode end plate, wherein a circular first protrusion is fixed on the cathode end plate, and an air distribution mesh is provided on the first protrusion;

[0009] A male end plate, wherein a second protrusion is fixed on the male end plate, and the first protrusion and the second protrusion are correspondingly arranged, and the air distribution net is arranged on the second protrusion;

[0010] A battery cell, wherein the battery cell is disposed between the cathode end plate and the anode end plate;

[0011] The power collection network is provided in two sets, with the two sets of power collection networks respectively located between the battery cell and the cathode end plate, and between the battery cell and the anode end plate;

[0012] A sealing assembly is disposed between the cathode end plate and the anode end plate, and the battery cell is disposed within the sealing assembly;

[0013] A fastening assembly is used to fix the negative end plate and the positive end plate together;

[0014] The gas distribution net on the first protrusion is used for air distribution and circulation, and the gas distribution net on the second protrusion is used for fuel gas distribution and circulation.

[0015] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, the gas distribution network includes an inlet, an outlet, a central collection area, an outer collection area, and a gas flow channel.

[0016] The air inlets are respectively opened at the center of the first boss and the second boss, and the negative end plate and the positive end plate are respectively provided with air inlet channels, which are connected to the air inlets;

[0017] The air outlet is provided in several groups, and the several groups of air outlets are arranged at equal intervals around the air inlet. The negative end plate and the positive end plate are respectively provided with air outlet channels, and the air outlet channels are connected to the air outlets.

[0018] The central gathering area is located at the center of the first boss and the second boss and is connected to the air inlet.

[0019] The outer collection area is respectively disposed on the first protrusion and the second protrusion, and the plurality of air outlets are all connected to the outer collection area;

[0020] The gas flow channel is provided in several groups, and the gas flow channel is provided between the outer collection area and the central collection area. The gas flow channel is provided at equal intervals around the periphery and the gas flow channel has a Y-shaped structure.

[0021] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, the sealing assembly includes a sealing gasket, which is disposed between the cathode end plate and the anode end plate. The sealing gasket has an annular structure, and the battery cell is disposed within the cavity formed by the cathode end plate, the anode end plate, and the sealing gasket.

[0022] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, the fastening assembly is provided in four sets, and the four sets of fastening assemblies are arranged in a rectangular structure. The fastening assembly includes a rod and a positioning seat. The rod passes through the cathode end plate, and the anode end plate and the positioning seat are limited and engaged by the positioning assembly. Insulating washers are respectively provided between the rod and the cathode end plate and between the positioning seat and the anode end plate.

[0023] According to the planar solid oxide fuel cell single-cell test fixture provided by the present invention, the positioning assembly includes a positioning sleeve fixedly connected to the positioning seat, a section of the insertion rod inserted into the positioning sleeve, two sets of annular positioning grooves equally spaced on the side wall of the insertion rod, a groove on the side wall of the positioning sleeve, a positioning ball slidably connected in the groove, the positioning ball and the annular positioning groove having a limiting fit, the diameter of the positioning ball being greater than the depth of the groove, a locking sleeve slidably connected to the outer wall of the positioning sleeve, a pushing block fixedly connected to the inner wall of the locking sleeve, the pushing block abutting against the positioning ball, and a compression spring fixedly connected between the locking sleeve and the positioning seat, the compression spring being sleeved on the outer wall of the positioning sleeve.

[0024] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, a cathode current collector terminal and an anode current collector terminal are respectively installed on the cathode end plate and the anode end plate. The cathode current collector terminal and the anode current collector terminal are respectively used to transmit the current signals collected by the two sets of current collector networks to the test instrument.

[0025] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, both the cathode end plate and the anode end plate are made of H62 copper alloy and are gold-plated on the surface.

[0026] According to the planar solid oxide fuel cell single cell test fixture provided by the present invention, the current collector network is a nickel foam mesh.

[0027] The present invention discloses the following technical effects:

[0028] In this invention, the gas distribution meshes on the cathode and anode plates are used for air gas distribution and circulation and fuel gas gas distribution and circulation, respectively. This not only increases the effective contact area between the reactant gas and the single cell, but also ensures a high gas flow rate, thus fully utilizing the performance of the single cell. Through the setting of sealing and fastening components, not only are good electrical contacts formed between the cathode plate, anode plate and single cell, but the cathode side and anode side of the single cell are also sealed, improving the overall airtightness of the device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an isometric view of the single-cell test fixture for the plate-type solid oxide fuel cell of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the anode end plate of the present invention;

[0032] Figure 3 This is an exploded view of the single-cell test fixture for the plate-type solid oxide fuel cell of the present invention.

[0033] Figure 4 This is a schematic diagram of the fastening assembly of the present invention.

[0034] The components are as follows: 1. Cathode end plate; 2. Inlet channel; 3. Cathode current collector terminal; 4. Inlet hole; 5. Central collection area; 6. Gas flow channel; 7. Outer collection area; 8. Outlet hole; 9. Anode end plate; 10. Battery cell; 11. Current collector network; 12. Sealing gasket; 13. Insulating gasket; 14. Fastening assembly; 15. Positioning seat; 16. Insert rod; 17. Annular positioning groove; 18. Positioning ball; 19. Locking sleeve; 20. Positioning sleeve; 21. Push block; 22. Compression spring; 23. Anode current collector terminal; 24. Outlet channel. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figures 1-4 This invention provides a planar solid oxide fuel cell single-cell test fixture, comprising:

[0038] The cathode end plate 1 has a circular first protrusion fixed on it, and an air distribution mesh is provided on the first protrusion.

[0039] Anode plate 9, a second protrusion is fixed on anode plate 9, the first protrusion and the second protrusion are correspondingly arranged, and an air distribution net is provided on the second protrusion;

[0040] The solar cell 10 is disposed between the cathode end plate 1 and the anode end plate 9;

[0041] The power collection network 11 is provided in two sets, which are respectively located between the solar cell 10 and the cathode end plate 1, and between the solar cell 10 and the anode end plate 9.

[0042] A sealing assembly is disposed between the cathode end plate 1 and the anode end plate 9, and the battery cell 10 is disposed inside the sealing assembly;

[0043] Fastening assembly 14 is used to fix the negative end plate 1 and the positive end plate 9 together;

[0044] The gas distribution net on the first protrusion is used for air distribution and circulation, and the gas distribution net on the second protrusion is used for fuel gas distribution and circulation.

[0045] The scheme has been further optimized, and the gas distribution network includes an air inlet 4, an air outlet 8, a central collection area 5, an outer collection area 7, and a gas flow channel 6.

[0046] The air inlet 4 is respectively opened at the center of the first boss and the second boss. The negative end plate 1 and the positive end plate 9 are respectively provided with air inlet channels 2, which are connected to the air inlet 4.

[0047] Several sets of air outlets 8 are provided, and the sets of air outlets 8 are arranged at equal intervals around the air inlet 4. Air outlet channels 24 are respectively opened on the negative end plate 1 and the positive end plate 9, and the air outlet channels 24 are connected to the air outlets 8.

[0048] The central gathering area 5 is located at the center of the first protrusion and the second protrusion and is connected to the air inlet 4;

[0049] The outer collection area 7 is respectively set on the first protrusion and the second protrusion, and a number of air outlets 8 are connected to the outer collection area 7.

[0050] The gas flow channel 6 is provided in several groups, and the gas flow channel 6 is provided between the outer collection area 7 and the central collection area 5. The gas flow channel 6 is provided at equal intervals around the perimeter, and the gas flow channel 6 has a Y-shaped structure.

[0051] The cathode end plate 1 and anode end plate 9 adopt the design of "central collection area 5 - gas flow channel 6 - outer collection area 7" and Y-shaped composite gas flow channel 6, which not only increases the effective contact area between the reaction gas and the single cell, but also makes the gas pressure in the central collection area 5 greater than the gas pressure in the outer collection area 7, ensuring a higher gas flow rate and giving full play to the performance of the single cell.

[0052] The design is further optimized so that the sealing assembly includes a sealing gasket 12, which is disposed between the cathode end plate 1 and the anode end plate 9. The sealing gasket 12 has a ring structure, and the battery cell 10 is disposed in the cavity formed by the cathode end plate 1, the anode end plate 9, and the sealing gasket 12.

[0053] The design is further optimized by setting four sets of fastening components 14. The four sets of fastening components 14 are arranged in a rectangular structure. Each fastening component 14 includes a rod 16 and a positioning seat 15. The rod 16 passes through the negative end plate 1 and the positive end plate 9 and is limited and engaged with the positioning seat 15 by the positioning component. Insulating washers 13 are respectively provided between the rod 16 and the negative end plate 1 and between the positioning seat 15 and the positive end plate 9.

[0054] The scheme is further optimized. The positioning component includes a positioning sleeve 20 fixedly connected to the positioning seat 15. A section of the insertion rod 16 is inserted into the positioning sleeve 20. Two sets of annular positioning grooves 17 are equally spaced on the side wall of the insertion rod 16. A groove is provided on the side wall of the positioning sleeve 20. A positioning ball 18 is slidably connected in the groove. The positioning ball 18 and the annular positioning groove 17 are mutually limiting and engaged. The diameter of the positioning ball 18 is greater than the depth of the groove. A locking sleeve 19 is slidably connected to the outer wall of the positioning sleeve 20. A pushing block 21 is fixedly connected to the inner wall of the locking sleeve 19. The pushing block 21 abuts against the positioning ball 18. A compression spring 22 is fixedly connected between the locking sleeve 19 and the positioning seat 15. The compression spring 22 is sleeved on the outer wall of the positioning sleeve 20.

[0055] The negative end plate 1 and the positive end plate 9 each have corresponding through holes for installing the fastening components 14. Four sets of fastening components 14 are respectively located at the four corners of the negative end plate 1 and the positive end plate 9. The insertion rod 16 has two sets of annular positioning grooves 17. The lower annular positioning groove 17 is used for positioning, and the other annular positioning groove 17 is used for locking positioning. Sliding the locking sleeve 19 downwards releases the positioning ball 18. The cross-section of the annular positioning groove 17 is trapezoidal, which facilitates... The relative sliding occurs between the positioning ball 18 and the locking sleeve 19 after switching the annular positioning groove 17. Under the action of the compression spring 22, the locking sleeve 19 slides upward. The ball is pushed into the annular positioning groove 17 by the pushing block 21 inside the locking sleeve 19, thus completing the positioning of the insertion rod 16. The cross-sectional shape of the pushing block 21 is arc-shaped. An abutment ring is installed on the positioning sleeve 20. The abutment ring abuts against the top of the locking sleeve 19. After the abutment ring abuts against the locking sleeve 19, the pushing block 21 just enters the groove.

[0056] The scheme is further optimized by installing a cathode collector terminal 3 and an anode collector terminal 23 on the cathode end plate 1 and the anode end plate 9, respectively. The cathode collector terminal 3 and the anode collector terminal 23 are used to transmit the current signals collected by the two sets of collector grids 11 to the test instrument.

[0057] The design was further optimized so that both the negative end plate 1 and the positive end plate 9 are made of H62 copper alloy and are gold-plated. The sealing gasket 12 and the insulating gasket 13 are made of HP5 mica, and the fastening component 14 is made of 304 stainless steel.

[0058] The scheme was further optimized, and the grid 11 was made of foamed nickel.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A planar solid oxide fuel cell single-cell test fixture, characterized in that, include: The cathode end plate (1) is fixed with a circular first protrusion, and an air distribution net is provided on the first protrusion; Anode plate (9), a second protrusion is fixed on the anode plate (9), the first protrusion and the second protrusion are correspondingly arranged, and the air distribution net is arranged on the second protrusion; A battery cell (10) is disposed between the cathode end plate (1) and the anode end plate (9); The power collection network (11) is provided in two sets, and the two sets of power collection networks (11) are respectively provided between the battery cell (10) and the cathode end plate (1) and between the battery cell (10) and the anode end plate (9); A sealing assembly is disposed between the cathode end plate (1) and the anode end plate (9), and the battery cell (10) is disposed within the sealing assembly; Fastening assembly (14), the negative end plate (1) and the positive end plate (9) are fixed together by the fastening assembly (14); The gas distribution net on the first protrusion is used for air distribution and circulation, and the gas distribution net on the second protrusion is used for fuel gas distribution and circulation. The air distribution network includes an air inlet (4), an air outlet (8), a central collection area (5), an outer collection area (7), and a gas flow channel (6). The air inlet (4) is respectively opened at the center of the first boss and the second boss. The negative end plate (1) and the positive end plate (9) are respectively provided with air inlet channels (2), and the air inlet channels (2) are connected to the air inlet (4). The air outlet (8) is provided in several groups, and the several groups of air outlets (8) are arranged at equal intervals around the air inlet (4). The negative end plate (1) and the positive end plate (9) are respectively provided with air outlet channels (24), and the air outlet channels (24) are connected to the air outlets (8). The central gathering area (5) is located at the center of the first boss and the second boss and is connected to the air inlet (4); The outer collection area (7) is respectively set on the first protrusion and the second protrusion, and the plurality of air outlets (8) are all connected to the outer collection area (7); The gas flow channel (6) is provided in several groups, and the gas flow channel (6) is provided between the outer collection area (7) and the central collection area (5). The gas flow channel (6) is provided at equal intervals around the perimeter, and the gas flow channel (6) has a Y-shaped structure. The fastening assembly (14) is provided in four sets, and the four sets of fastening assemblies (14) are arranged in a rectangular structure. The fastening assembly (14) includes a plug (16) and a positioning seat (15). The plug (16) passes through the negative end plate (1), and the positive end plate (9) and the positioning seat (15) are limited and matched by the positioning assembly. Insulating washers (13) are respectively provided between the plug (16) and the negative end plate (1) and between the positioning seat (15) and the positive end plate (9). The positioning assembly includes a positioning sleeve (20) fixedly connected to the positioning seat (15), a section of the insertion rod (16) is inserted into the positioning sleeve (20), two sets of annular positioning grooves (17) are equally spaced on the side wall of the insertion rod (16), a groove is provided on the side wall of the positioning sleeve (20), a positioning ball (18) is slidably connected in the groove, the positioning ball (18) and the annular positioning groove (17) are mutually limited, the diameter of the positioning ball (18) is greater than the depth of the groove, a locking sleeve (19) is slidably connected to the outer wall of the positioning sleeve (20), a pushing block (21) is fixedly connected to the inner wall of the locking sleeve (19), the pushing block (21) abuts against the positioning ball (18), a compression spring (22) is fixedly connected between the locking sleeve (19) and the positioning seat (15), and the compression spring (22) is sleeved on the outer wall of the positioning sleeve (20).

2. The planar solid oxide fuel cell single-cell test fixture according to claim 1, characterized in that: The sealing assembly includes a sealing gasket (12), which is disposed between the cathode end plate (1) and the anode end plate (9). The sealing gasket (12) has an annular structure. The battery cell (10) is disposed in the cavity formed by the cathode end plate (1), the anode end plate (9), and the sealing gasket (12).

3. A planar solid oxide fuel cell single-cell test fixture according to claim 1, characterized in that: The cathode end plate (1) and the anode end plate (9) are respectively equipped with a cathode collector terminal (3) and an anode collector terminal (23). The cathode collector terminal (3) and the anode collector terminal (23) are respectively used to transmit the current signals collected by the two sets of collector grids (11) to the test instrument.

4. A planar solid oxide fuel cell single-cell test fixture according to claim 1, characterized in that: Both the negative end plate (1) and the positive end plate (9) are made of H62 copper alloy and are gold-plated on the surface.

5. A planar solid oxide fuel cell single-cell test fixture according to claim 1, characterized in that: The collection network (11) is a nickel foam mesh.

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