A connector for a solid oxide fuel cell, an SOFC stack

Abstract

The present invention relates to the field of solid oxide fuel cells (SOFCs), and particularly to a connector and a stack for SOFCs. The connector has a two-stage flow disturbance structure, which cooperates with multiple sets of independently arranged flow channel groups in a stepped manner. Each flow channel group contains multiple flow channels. Independent second flow disturbance groove structures are respectively designed at both ends of each flow channel group, so that the fluid entering each flow channel can maintain the uniformity of content throughout the process from entry to exit. The fluid is initially disturbed and balanced in the first flow disturbance groove, and then cooperates with the second flow disturbance groove and the independent flow channel group to jointly distribute the material uniformly, improving the uniformity coefficient. By regulating the flow disturbance structure inside the second flow disturbance groove, the material distribution amount inside different flow channel groups can be controlled according to the operating requirements. It overcomes the technical defects in the prior art of uneven material distribution or uncontrollable material distribution amount in each flow channel caused by the differences in the positions of each flow channel group on the plate or the positional relationship with each channel.

Description

Technical Field

[0001] The present invention relates to the field of solid oxide fuel cells; in particular, to a connector and a SOFC stack for a solid oxide fuel cell. Background Art

[0002] A solid oxide fuel cell, abbreviated as SOFC (Solid Oxide Fuel Cell), is a high-temperature fuel cell with an operating temperature between 650°C and 800°C. The stack mainly consists of an end plate, an insulating plate, a semi-connector plate, a connector, a seal, a single cell, a fastening bolt assembly, etc.; the (semi-)connector mainly plays the role of transmitting electrons between adjacent single cells and separating fuel and oxidant; and distributing the materials entering both sides of the single cell. The working environment where the connector is located is harsh, and it is required to have high electrical conductivity, excellent thermal conductivity, oxidation resistance, anti-fluidization, anti-carbon deposition, etc., as well as good mechanical properties.

[0003] Special flow channel areas are designed on the connector for material distribution. The one only used for unilateral material distribution is called a semi-connector, and the one that distributes materials on both sides is called a full connector or a connector. The rationality and uniformity of material distribution on the surface of a single cell affect the performance of the stack; at the same time, the heat generated during the operation of the stack is mainly exchanged and dissipated through the flow of materials and taken away, and the gas flow will affect the temperature distribution inside the stack.

[0004] In the prior art, after the material enters from the inlet of the connector, it flows through the flow channel area and then flows out through the outlet. There is no special design between the flow channel and the inlet and outlet, and the uniformity of material distribution in the flow channel will be poor. At the same time, the material distribution amount between each flow channel is uncontrollable; at the same time, the sizes and positions of the inlets and outlets of the fuel and oxidant on the same side are restricted from each other, which will affect the gas flow distribution at the inlet of the flow channel. The lengths of each flow channel are inconsistent, and the frictional resistance suffered by the material is inconsistent, affecting the material flow rate and material distribution.

[0005] In the prior art, after the material enters from the inlet of the connector, it flows through the flow channel area and then flows out through the outlet. There is no special design between the flow channel and the inlet and outlet, and the uniformity of material distribution in the flow channel will be poor. At the same time, the sizes and positions of the inlets and outlets of the fuel and oxidant on the same side are restricted from each other, which will affect the gas flow distribution at the inlet of the flow channel. The lengths of each flow channel are inconsistent, and the frictional resistance suffered by the material is inconsistent, affecting the material flow rate and material distribution. Summary of the Invention

[0006] The purpose of the present invention is to provide a connector structure for a solid oxide fuel cell aiming at the distribution problems existing in the prior art, such as poor uniformity of material distribution in the flow channel and uncontrollable distribution amount.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A connector for a solid oxide fuel cell, comprising a plate body, the plate body includes a first end and a second end, a first through hole is provided at the first end, a second through hole is provided at the second end, and a plurality of flow channel groups are provided between the first through hole and the second through hole, and a plurality of flow channels are arranged in parallel in each flow channel group;

[0009] A first flow disturbance component is provided between the first through hole and the first end of the flow channel group;

[0010] The first flow disturbance component includes a first flow disturbance groove and a plurality of second flow disturbance grooves, the first flow disturbance groove is communicated with the second flow disturbance grooves through a plurality of second drainage grooves, the second flow disturbance grooves are arranged at the first end of the flow channel group, and the numbers of the second flow disturbance grooves and the second drainage grooves respectively correspond to the number of the flow channel groups.

[0011] The present invention provides a new connector structure for a solid oxide fuel cell, that is, two - stage flow disturbance grooves are added at the inlet end of the first through hole and the flow channel group, so that the fuel or oxygen (air) entering the first through hole can be disturbed for the first time and evenly enter each drainage groove. After passing through each second drainage groove, when officially entering each flow channel group, it is disturbed again. In this way, through the combined design of multiple drainage grooves, two - stage diversion grooves and multiple independent flow channel groups, the present invention realizes the uniform distribution of material in and out, improves the uniformity coefficient, and can control the distribution amount according to requirements.

[0012] As a preferred solution of the present invention, the flow channel groups are arranged horizontally, the lengths of the flow channels in a plurality of the flow channel groups are equal, and the flow channel groups are distributed in a stepped shape from top to bottom.

[0013] As a preferred solution of the present invention, the first flow disturbance groove is arranged close to the first through hole, and a first drainage groove is arranged between the first flow disturbance groove and the first through hole.

[0014] As a preferred solution of the present invention, a plurality of the second drainage grooves are distributed in a stepped shape between the first flow disturbance groove and the second flow disturbance grooves.

[0015] As a preferred solution of the present invention, a second flow disturbance component is provided between the second through hole and the second end of the flow channel group, the structure of the second flow disturbance component is the same as that of the first flow disturbance component, and the second flow disturbance component and the first flow disturbance component are distributed on the plate body in a symmetric mirror image manner.

[0016] As a preferred embodiment of the present invention, the first through-hole and the second through-hole are arranged at diagonal positions on the plate body. Specifically, on the front surface of the connecting body structure, the first through-hole is arranged at the lower right corner of the plate body, and the second through-hole is arranged at the upper left corner of the plate body. A plurality of flow channel groups are in the upward step direction from the lower left corner to the upper right corner. The first flow disturbance component is arranged at a position close to the lower right corner, and the second flow disturbance component is arranged at a position close to the upper left corner. The first flow disturbance component and the second flow disturbance component are symmetrically distributed about the center.

[0017] As a preferred embodiment of the present invention, a flow disturbance array is arranged in the first flow disturbance groove or the second flow disturbance groove. The flow disturbance array includes a plurality of convex platforms, and the convex platforms are one or a combination of a cube, a cuboid, a cylinder, and a triangular pyramid.

[0018] As a preferred embodiment of the present invention, the flow channel groups include 6 - 12 groups, and each flow channel group includes 5 - 20 flow channels.

[0019] As a preferred embodiment of the present invention, a fourth through-hole is further arranged at the first end of the plate body, and a third through-hole is further arranged at the second end of the substrate body.

[0020] As a preferred embodiment of the present invention, the flow channel groups are arranged on any one surface of the plate body; or the flow channel groups are simultaneously arranged on the front surface and the back surface of the plate body.

[0021] Specifically, when only one surface of the plate body is provided with a flow channel group structure, the connecting body is a semi-connecting body. Among them, the first through-hole is a fuel inlet, the second through-hole is a fuel outlet, the third through-hole is an air inlet, and the fourth through-hole is an air outlet; the area between the third through-hole and the fourth through-hole on the back surface is a planar structure without a flow channel group design.

[0022] When both the front and back surfaces of the plate body are provided with flow channel group structures, this connecting body is a full-connecting body. Among them, the first through-hole is a fuel inlet, the second through-hole is a fuel outlet, the third through-hole is an air inlet, and the fourth through-hole is an air outlet; the structure of the area where air flows between the third through-hole and the fourth through-hole on the back surface is the same as the structure of the area where fuel flows on the front surface, and the fuel and air are parallel flows in the same direction.

[0023] As a preferred technical solution of the present invention, on the front surface of the connecting body structure, the downward step direction of the flow channel group faces the second end; on the back surface of the connecting body structure, the downward step direction of the flow channel group faces the first end. In this case, the structures of the front and back surfaces of the connecting body structure are completely the same.

[0024] As a preferred technical solution of the present invention, it is located on the back surface of the connection body structure, and the downward step direction of the flow channel group is the same as that of the flow channel group, and both are arranged towards the second end.

[0025] Specifically, it is located on the back surface of the connection body structure. The first spoiler groove at the air inlet end of the second flow channel group is arranged near the position of the second through hole, and the first spoiler groove at the air outlet end of the second flow channel group is arranged near the first through hole.

[0026] An SOFC stack including the connection body.

[0027] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0028] 1. The present invention proposes an inventive concept of two-stage spoiler cooperation with an independent flow channel group. Specifically, in the technical solution of the present invention, multiple groups of independently arranged flow channel groups in a stepped arrangement are designed. Each flow channel group is further divided into 5 - 20 flow channels, and the lengths of all flow channels are equal. By unifying the lengths of the flow channels, the fuel or air entering the flow channels will not show differences due to the length arrangement of the flow channels. Further, opposing second spoiler groove structures are designed at both ends of each flow channel group, so that the fluid (material) entering each flow channel can maintain the uniformity of content throughout the entire process from entry to discharge. At the same time, the material first entering the first channel is initially disturbed in the first spoiler groove to balance the material, and then the first spoiler groove, the second spoiler groove, and the independent flow channel group cooperate with each other to jointly perform the controllable distribution of the material, overcoming the technical defects of uneven and uncontrollable material distribution in the prior art due to the differences in the positions of each flow channel group on the electrode plate or the positional relationship with each channel.

[0029] 2. The improvement in the structure of the connection body of the present invention enables the complete correspondence of the flow channel groups on the front and back surfaces of the connection body, truly realizing the parallel convection or parallel countercurrent of fuel and air.

[0030] 3. When the technical improvement of the present invention is used to improve the uniformity of material distribution, the uniformity of the flow rate of the material can be increased to more than 95%. Furthermore, the performance of the stack prepared by this connection body has a greater improvement compared with the prior art.

[0031] 4. Through the design concept of the present invention, when used to balance the uniformity of the temperature field distribution inside the plane of the stack or the connection body (monolithic cell), the distribution amount of the material in the flow channel can be regulated, thereby controlling the progress of the electrochemical reaction, affecting the generation of heat, and further controlling the distribution of the temperature field. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1Schematic front view of the full connector in Embodiment 1 of the present invention;

[0033] Figure 2 Schematic back view of the full connector in Embodiment 1 of the present invention;

[0034] Figure 3 Schematic back view of the full connector in Embodiment 2 of the present invention;

[0035] Figure 4 Schematic front view of the half connector in Embodiment 3 of the present invention;

[0036] Figure 5 Schematic back view of the half connector in Embodiment 3 of the present invention;

[0037] Figure 6 Simulation analysis diagram of the connector in Embodiment 1;

[0038] Figure 7 Simulation analysis diagram of the connector in Comparative Example 1;

[0039] Figure 8 Simulation analysis diagram of the connector in Comparative Example 2;

[0040] Figure 9 Simulation analysis diagram of the connector in Comparative Example 3;

[0041] Figure 10 Simulation analysis diagram of the connector in Comparative Example 4;

[0042] Figure 11 Simulation analysis diagram of the connector in Comparative Example 5 (existing connector structure);

[0043] Icons: 100 - Plate body; 200 - First end; 300 - Second end;

[0044] 1 - First through - hole; 2 - Second through - hole; 3 - Third through - hole; 4 - Fourth through - hole; 11 - First turbulence - generating component; 111 - First turbulence - generating groove; 112 - Second turbulence - generating groove; 101 - First drainage groove; 102 - Second drainage groove; 12 - Flow - channel group; 121 - Flow - channel; 21 - Second turbulence - generating component. Detailed implementation manners

[0045] The present invention will be described in detail below with reference to the accompanying drawings.

[0046] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] Example 1

[0048] This embodiment provides a full - connection body structure. As shown Figure 1-2 in the figure, it includes a plate body 100. The plate body includes a first end 200 and a second end 300. The first end 200 is provided with a first through - hole 1 and a fourth through - hole 4, and the second end 102 is provided with a second through - hole 2 and a third through - hole 3.

[0049] A number of flow - channel groups 12 are arranged between the first through - hole 1 and the second through - hole 2. Each flow - channel group 12 is provided with a plurality of parallel flow channels 121. Further specifically, the flow - channel groups 12 are horizontally arranged on the plate body 100. The lengths of the flow channels 121 in a number of the flow - channel groups 12 are all equal, and the flow - channel groups 12 are distributed in a stepped shape from top to bottom. In this embodiment, a total of seven flow - channel groups are provided. Among them, each flow - channel group 12 is further provided with six flow channels 121. More specifically, on the front surface of the plate body 100, the first through - hole 1 is arranged at the lower right corner of the plate body 100, the second through - hole 2 is arranged at the upper left corner of the plate body 100, and the seven flow - channel groups 12 are in the upward - step direction from the lower left corner to the upper right corner.

[0050] A first flow - disturbing component 11 is arranged between the first through - hole 1 and the first end of the flow - channel group 12. The first flow - disturbing component 11 includes a first flow - disturbing groove 111 and a number of second flow - disturbing grooves 112. The first flow - disturbing groove 111 and the second flow - disturbing grooves 112 are connected through a number of second drainage grooves 102. The second flow - disturbing grooves 112 are arranged at the first end of the flow - channel group 12, and the numbers of the second flow - disturbing grooves 112 and the second drainage grooves 102 respectively correspond to the number of the flow - channel groups 12.

[0051] Specifically, the second drainage grooves 102 are distributed in a stepped shape between the first flow - disturbing groove 111 and the second flow - disturbing grooves 112.

[0052] A first drainage groove 101 is arranged on one side of the first flow - disturbing groove 111 close to the first through - hole 1. Further, a second flow - disturbing component 21 is arranged between the second through - hole 2 and the second end of the flow - channel group 12. The structure of the second flow - disturbing component 21 is the same as that of the first flow - disturbing component 11, and the second flow - disturbing component 21 and the first flow - disturbing component 11 are distributed on the plate body 100 in a symmetric mirror - image manner. Specifically, the first flow - disturbing component 11 is arranged at a position close to the lower right corner of the plate body 100; the second flow - disturbing component is arranged at a position close to the upper left corner. The first flow - disturbing component 11 and the second flow - disturbing component 21 are centrosymmetrically distributed.

[0053] More specifically, the first through-hole 1, the second through-hole 2, the third through-hole 3, and the fourth through-hole 4 penetrate through the entire plate body 100; the first drainage groove 101 is a groove that communicates the first through-hole 1 and the first flow disturbance groove 111; its width can be adjusted according to the actual size of the through-hole; the second drainage groove 102 is a groove that communicates the first flow disturbance groove 111 and the second flow disturbance groove 112; its width can be adjusted according to the actual size of the through-hole; the number of the second drainage grooves 102 is the same as the number of the flow channel groups 12, and each flow channel group 12 corresponds to a single second drainage groove 102, and the second drainage grooves 102 are distributed in a stepped manner.

[0054] Both the first flow disturbance groove 111 and the second flow disturbance groove 112 are grooves, and a flow disturbance array is arranged inside, and the flow disturbance array includes a plurality of convex platforms, and the convex platforms are one or a combination of more of a cube, a cuboid, a cylinder, and a triangular pyramid; or a porous medium fixed thereto.

[0055] The other areas of the plate body 100 are the sealing areas 5, and the sealing areas 5 are used for installing seals, the through-holes on the sealing connection body, and the reaction areas formed by the connection body and the single battery.

[0056] The material of the plate body 100 is SUS 430, Crofer22 APU, and other materials; the surface is sprayed with one or more of a spinel coating, an active oxide coating, and a perovskite coating.

[0057] Such as Figure 2 shown is the schematic diagram of the back structure of the full connection body;

[0058] Specific working principle: The first through-hole 1 is the fuel inlet, the second through-hole 2 is the fuel outlet, the third through-hole 3 is the air inlet, and the fourth through-hole 4 is the air outlet; the air flow areas between the third through-hole 3 and the fourth through-hole 4 on the back are the same, and the fuel and the air are parallel flows in the same direction.

[0059] The fuel enters from the first through-hole 1, reaches the first flow disturbance groove 111 after passing through the first drainage groove 101, and after passing through the flow disturbance structure in the first flow division groove 111, the fuel is evenly divided into the second drainage groove 102. In the example, there are 7 second drainage grooves in total. The fuel flowing through the second drainage groove 102 flows through the second flow disturbance groove 112, and after passing through the flow disturbance structure in the second flow disturbance groove 112, the fuel is evenly divided into the corresponding flow channel groups 12. The reactants corresponding to the fuel after participating in the reaction in the flow channel groups 12 sequentially pass through the second flow disturbance groove 112, the second drainage groove 102, the first flow disturbance groove 111, and the first drainage groove 101 and then reach the second through-hole 2, and flow out of the connection body through the second through-hole 2.

[0060] Located on the back of the full-connection body, air enters through the third through-hole 3 and successively passes through the first drainage groove 101, the first turbulence groove 111, the second drainage groove 102, and the second turbulence groove 112 to enter the flow channel group 12. After the air participates in the reaction through the flow channel group 12, the corresponding reaction products successively pass through the second turbulence groove 112, the second drainage groove 102, the first turbulence groove 111, and the first drainage groove 101 in the second turbulence component 21 and then reach the fourth through-hole 4, and flow out of the connection body through the fourth through-hole 4.

[0061] Embodiment 2

[0062] This embodiment provides a full-connection body structure. The front surface of the full-connection body structure in Embodiment 2 is the same as that in Embodiment 1, and will not be elaborated here; specifically, the back surface structure of the full-connection body structure in Embodiment 2 is introduced.

[0063] As Figure 3 shown, the first through-hole 1 and the fourth through-hole 4 correspond to the first end 200 of the electrode plate body 100, and the second through-hole 2 and the third through-hole 3 correspond to the second end 300 of the electrode plate body 100. In this embodiment, the flow channel group 12 faces the second end 300 as the downward step direction, which is the same as the downward step direction of the flow channel group 12 on the front surface, and the orthographic projection between the front surface and the back surface completely coincides. Among them, the overall position projections of the first turbulence component 11 and the second turbulence component 21 located on the back surface coincide with the projection on the front surface. The difference is that the design method of the first drainage groove 101 is somewhat different from that of the first drainage groove 101 in Embodiment 1. In this embodiment, the first drainage groove is inclined at the ends of the third through-hole 3 and the fourth through-hole 4.

[0064] Embodiment 3

[0065] This embodiment provides a semi-connection body structure. Its front surface structure is as Figure 4 shown, and the back surface structure is as Figure 5 shown. In the semi-connection body structure, the overall front surface structure of the electrode plate body 100 is the same as that in Embodiment 1. The difference is only that the electrode plate body 100 of the semi-connection body is further provided with a drainage ear 6.

[0066] Located on the back of the semi-connection body, the flow channel group 12 structure is not provided.

[0067] The working process is specifically as follows:

[0068] The first through-hole 1 is the fuel inlet, the second through-hole 2 is the fuel outlet, the third through-hole 3 is the air inlet, and the fourth through-hole 4 is the air outlet; the area between the third through-hole 3 and the fourth through-hole 4 on the back surface is a planar structure without a flow channel design.

[0069] Fuel enters through the first through-hole 1, reaches the first flow guiding groove 101, and then arrives at the first turbulence groove 111. After passing through the turbulence structure in the first flow dividing groove 111, the fuel is evenly divided into the second flow guiding groove 102. In the example, there are a total of 7 second flow guiding grooves. The fuel flowing through the second flow guiding groove 102 passes through the second turbulence groove 112, and after passing through the turbulence structure in the second turbulence groove 112, the fuel is evenly divided into the corresponding flow channel group 12. The reactants corresponding to the fuel participating in the reaction through the flow channel group 12 sequentially pass through the second turbulence groove 112, the second flow guiding groove 102, the first turbulence groove 111, and the first flow guiding groove 101 in the second turbulence assembly 21 and then reach the second through-hole 2, and flow out of the connector through the second through-hole 2.

[0070] The current generated by the operation of the fuel cell stack is led out through the current lead wire connected to the current guiding ear 6.

[0071] Air enters the fuel cell stack through the third through-hole 3, and the air after the reaction flows out of the fuel cell stack through the fourth through-hole 4.

[0072] Comparative Example 1

[0073] A fully-connected body structure is designed. Among them, its structure is the same as that of Embodiment 1, and the only difference is that in this Comparative Example 1, no turbulence components are provided in the first turbulence groove 111 and the second turbulence groove 112.

[0074] Comparative Example 2

[0075] A fully-connected body structure is designed. Among them, its structure is the same as that of Embodiment 1, and the only difference is that in this Comparative Example 2, the second turbulence groove 112 is not provided.

[0076] Comparative Example 3

[0077] A fully-connected body structure is designed. Among them, its structure is the same as that of Embodiment 1, and the only difference is that in this Comparative Example 23, the first turbulence groove 111 is not provided.

[0078] Comparative Example 4

[0079] A fully-connected body structure is designed. Among them, its structure is the same as that of Embodiment 1, and the only difference is that in this Comparative Example 4, the first turbulence groove 111 and the second turbulence groove 112 are not provided.

[0080] Comparative Example 5

[0081] The existing connector structure has no turbulence component structure and no flow channel group structure in the flow channel area.

[0082] Among them, the structures and performance test data between Embodiment 1 and Comparative Examples 1-5 are shown in the following summary table 1.

[0083] Table 1 is the summary table of structure and performance test data

[0084]

[0085] Perform a simulation analysis experiment on the structure corresponding to the full-connector in Example 1. Specific working conditions: the inlet gas flow rate is 1.6 L / min, and the working temperature is 500 °C; the results are as Figure 6 shown. The uniformity between different flow channel groups is very good, and the uniformity within the same flow channel group is also very good. The velocities within the same flow channel group are basically the same.

[0086] Perform a simulation analysis experiment on the structure corresponding to the full-connector in Comparative Example 1. Specific working conditions: the inlet gas flow rate is 1.6 L / min, and the working temperature is 500 °C; the results are as Figure 7 shown. It can be seen from the result diagram that: the flow velocities at the outlets of each flow channel show a trend of being high at both sides and low in the middle. The overall flow velocity range is approximately in the interval of 4.7 m / s - 6.1 m / s, and the difference between the maximum flow velocity and the minimum flow velocity is about 1.4 m / s.

[0087] Perform a simulation analysis experiment on the structure corresponding to the full-connector in Comparative Example 2. Specific working conditions: the inlet gas flow rate is 1.6 L / min, and the working temperature is 500 °C; the results are as Figure 8 shown. It can be seen from the result diagram that: the flow velocity differences among the flow channels within the same flow channel group are relatively large, showing a situation of being high in the middle and low at both sides; the results are not ideal.

[0088] Perform a simulation analysis experiment on the structure corresponding to the full-connector in Comparative Example 3. Specific working conditions: the inlet gas flow rate is 1.6 L / min, and the working temperature is 500 °C; the results are as Figure 9 shown. It can be seen from the result diagram that: there are differences in the flow velocities between the flow channel groups, and at the same time, there are also differences in the flow velocities of the flow channels within the same group of flow channels, basically showing a trend of being high in the middle and low at both sides.

[0089] Perform a simulation analysis experiment on the structure corresponding to the full-connector in Comparative Example 4. Specific working conditions: the inlet gas flow rate is 1.6 L / min, and the working temperature is 500 °C; the results are as Figure 10 shown. It can be seen from the result diagram that: the flow velocity fluctuations of the flow channels are large, and the trend is not obvious.

[0090] Perform a simulation analysis experiment on the structure corresponding to the connector in Comparative Example 5. Specific working conditions: the inlet gas flow rate is 2.93e-5 kg / s, and the working temperature is 500 °C; the results are as Figure 11 shown. It can be seen from the result diagram that: the flow velocity fluctuations of the flow channels are large, and the difference between the flow velocities in the middle region and the edge flow velocities is very obvious.

[0091] Combined with the statistical data in Table 1 and the appendix Figure 6-10It can be found that when only the first spoiler groove is provided on the plate body and the second spoiler groove is not provided, although the flow channel groups are grouped, there are still large flow velocity differences among the flow channel groups. However, it can be seen from the simulation experiment with the second spoiler groove cooperating with the independent flow channel group that the flow velocity difference of the flow channel group has a tendency to be further reduced. This indicates that through the combination of the independent flow channel group and the corresponding second spoiler groove, the two structures cooperate with each other to jointly reduce the flow velocity difference between the flow channels, making the material distribution in the flow channels more uniform, which is extremely beneficial to improving the fuel utilization rate.

[0092] Combined with the Figure 11 analysis, it is found that the design of the flow channel group and the stepped drainage groove can significantly improve the uniformity of material distribution compared with the existing structure.

[0093] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connector for a solid oxide fuel cell, comprising a plate body (100), characterized in that, The plate body (100) includes a first end portion (200) and a second end portion (300). The first end portion (200) is provided with a first through hole (1), and the second end portion (300) is provided with a second through hole (2). A plurality of flow channel groups (12) are arranged between the first through hole (1) and the second through hole (2). Each flow channel group (12) includes a plurality of flow channels (121) arranged in parallel; the number of the flow channel groups is 6 - 12 groups, and each flow channel group includes 5 - 20 flow channels; A first flow disturbance component (11) is arranged between the first through hole (1) and the first end portion of the flow channel group (12); the first flow disturbance component (11) includes a first flow disturbance groove (111) and a plurality of second flow disturbance grooves (112). The first flow disturbance groove (111) is communicated with the second flow disturbance grooves (112) through a plurality of second drainage grooves (102). The second flow disturbance grooves (112) are arranged at the first end portion of the flow channel group (12), and the numbers of the second flow disturbance grooves (112) and the second drainage grooves (102) respectively correspond to the number of the flow channel groups (12); a second flow disturbance component (21) is arranged between the second end portion of the flow channel group (12) and the second through hole (2), and the structure of the second flow disturbance component (21) is the same as that of the first flow disturbance component (11); Flow disturbance arrays are arranged in both the first flow disturbance groove (111) and the second flow disturbance groove (112); the flow disturbance array includes a plurality of convex platforms, and the convex platforms are one or a combination of a cube, a cuboid, a cylinder, and a triangular pyramid.

2. The interconnect for a solid oxide fuel cell according to claim 1, characterized in that, The flow channel groups (12) are arranged horizontally, the lengths of the flow channels (121) in the plurality of flow channel groups (12) are the same, and the flow channel groups (12) are distributed in a stepped manner from top to bottom.

3. The interconnect for a solid oxide fuel cell according to claim 2, wherein, The first flow disturbance groove (111) is arranged close to the first through hole (1), and a first drainage groove (101) is arranged between the first flow disturbance groove (111) and the first through hole (1).

4. The interconnect for a solid oxide fuel cell according to claim 2, characterized in that, A plurality of the second drainage grooves (102) are distributed in a stepped manner between the first flow disturbance groove (111) and the second flow disturbance groove (112).

5. The interconnect for a solid oxide fuel cell according to claim 4, characterized in that, The second flow disturbance component (21) and the first flow disturbance component (11) are distributed on the plate body (100) in a centrosymmetric manner.

6. The interconnect for a solid oxide fuel cell according to claim 1, wherein The first through hole (1) and the second through hole (2) are arranged at diagonal positions on the plate body (100).

7. The interconnect for a solid oxide fuel cell according to claim 1, characterized in that, A fourth through hole (4) is further arranged at the first end portion of the plate body (100), and a third through hole (3) is further arranged at the second end portion (300) of the plate body (100).

8. The interconnect for a solid oxide fuel cell according to claim 7, characterized in that, The flow channel groups (12) are arranged on any surface of the plate body (100); or the flow channel groups (12) are arranged on both the front and back surfaces of the plate body (100) simultaneously.

9. An SOFC stack including the connector according to any one of claims 1 - 8.

Images