Double-sided connector and solid oxide electric pile

Abstract

The present invention provides a double-sided connector and a solid oxide stack, the double-sided connector comprising: a body having a first surface and a second surface; the plurality of first grooves are formed in the first surface, and the plurality of first grooves are arranged at intervals along the first direction; the plurality of second grooves are formed in the second surface, and the plurality of second grooves are communicated with one another. The air channel inlet and the air channel outlet are located on the two sides of the second grooves in the first direction, and the gas channel inlet and the gas channel outlet are located on the two sides of the first groove in the second direction. Based on the arrangement of the plurality of first grooves and the plurality of second grooves, the stack height of the stack is reduced, the volume occupation of the stack is reduced, and the heat loss surface area of the stack is reduced, so that the space utilization rate, the volume power ratio and the energy utilization efficiency of the stack are improved. And based on the gas channel inlet and outlet and the air channel inlet and outlet which are optimally designed, the gas leakage risk is reduced, and the utilization rate of gas and air is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of solid oxide batteries, and in particular to a double-sided connector and a solid oxide battery stack. Background Art

[0002] Solid oxide cell (SOC) is an electrochemical device with high energy conversion efficiency and environmentally friendly characteristics. With the continuous growth of global energy demand and the increasing attention to environmental protection, it is crucial to find clean and efficient energy conversion technology.

[0003] As traditional energy sources face resource depletion and environmental pressure, solid oxide batteries have attracted widespread attention due to their unique advantages. They can directly convert chemical energy into electrical energy under medium and high temperature conditions. Not only does it have high energy conversion efficiency, but it can also use a variety of fuels, such as hydrogen, methane, carbon monoxide, etc., and has a wide range of fuel adaptability. In addition, solid oxide batteries produce very few pollutants during operation and are environmentally friendly.

[0004] At present, most SOC stacks are composed of multiple monolithic batteries stacked in sequence. However, this design has the following problems: (1) The volume-to-power ratio of the stack is relatively low. Due to the limitations of its structural design and material properties, the power that can be generated in the same volume is relatively limited. This means that in order to achieve a certain output power, a large space is required, which is not conducive to use in space-constrained application scenarios; (2) When multiple stacks are combined, the gas path connection is more complicated. When the gas flows through different stacks, problems such as uneven pressure and uneven flow distribution may occur, affecting the overall performance and efficiency. In addition, the complex gas path connection also increases The risk of leakage in the system reduces the reliability of the system; (3) The space utilization efficiency of the fuel cell stack is not high. Its structure is often relatively regular and fixed, and it is difficult to flexibly adapt to installation spaces of different shapes and sizes. In some compact equipment or systems, it may not be possible to fully utilize the limited space to arrange the fuel cell stack, thus affecting the integration and compactness of the entire system; (4) The fuel cell stack has a large heat loss under medium and high temperature operating conditions. Since the surface area of ​​a single-chip fuel cell stack is relatively large, heat can easily be dissipated into the surrounding environment through the surface, which not only reduces the energy utilization efficiency, but also increases the energy input required to maintain the operating temperature, and puts higher requirements on the thermal management of the entire system. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a double-sided connector and a solid oxide fuel cell stack.

[0006] In a first aspect, the present invention provides a double-sided connector, which is applied to a solid oxide battery, comprising: a body having a first surface and a second surface that are parallel and opposite to each other in the thickness direction of the body, and the body is provided with a gas channel inlet, a gas channel outlet, an air channel inlet and an air channel outlet, the air channel inlet and the air channel outlet are formed at intervals on both sides of the body along the first direction of the body, and the gas channel inlet and the gas channel outlet are formed at intervals on both sides of the body along the second direction of the body; a plurality of first grooves, which are recessed downward from the first surface and are used to accommodate at least part of the solid oxide battery, and the plurality of first grooves are arranged at intervals along the first direction, and any of the first grooves has the gas channel inlet and the gas channel outlet on both sides along the second direction, respectively, and the gas flows into the first groove from the gas channel inlet and flows out through the gas channel outlet; and a plurality of second grooves, which are recessed downward from the second surface and are used to accommodate at least part of the solid oxide battery, the second grooves are arranged corresponding to the first grooves, the plurality of second grooves are connected to each other, and the plurality of second grooves correspond to one air channel inlet and one air channel outlet in common, and the air flows into the second groove from the air channel inlet and flows out through the air channel outlet. The second direction is perpendicular to the first direction.

[0007] Furthermore, the double-sided connector further comprises: a plurality of first supporting protrusions, which are arranged in the first groove at intervals along the first direction and face the corresponding solid oxide battery; a plurality of first diverter protrusions, which are arranged in the first direction at intervals at one end of the first groove close to the gas channel inlet and / or one end of the first groove close to the gas channel outlet. The first diverter protrusions are arranged at intervals from the first supporting protrusions along the second direction, and a first diverter channel is formed between two adjacent first diverter protrusions.

[0008] Furthermore, the first flow diversion channel includes a first flow diversion section and a second flow diversion section arranged in sequence along the second direction, the cross-sectional area of ​​the first flow diversion section is smaller than the cross-sectional area of ​​the second flow diversion section. In the second direction, the cross-sectional area of ​​the second flow diversion section gradually increases from the first flow diversion section toward the first supporting protrusion.

[0009] Further, the first groove includes a first main body section and a first support section located on both sides of the first main body section in the first direction, a plurality of first support protrusions are arranged in the first main body section, and a support surface of the first support protrusion is arranged flush with a support surface of the first support section.

[0010] Furthermore, the double-sided connector further comprises: a plurality of second supporting protrusions, which are arranged in the second groove at intervals along the second direction and face the corresponding solid oxide battery; and a plurality of second diverter protrusions, which are arranged in the second groove at intervals along the second direction near the inlet of the air channel and / or near the outlet of the air channel. The second diverter protrusions are arranged at intervals along the first direction from the second supporting protrusions, and a second diverter channel is formed between two adjacent second diverter protrusions.

[0011] Furthermore, the second flow diversion channel includes a third flow diversion section and a fourth flow diversion section sequentially arranged along the first direction, the cross-sectional area of ​​the third flow diversion section is smaller than the cross-sectional area of ​​the fourth flow diversion section. In the first direction, the cross-sectional area of ​​the fourth flow diversion section gradually increases from the third flow diversion section toward the second supporting protrusion.

[0012] Furthermore, the double-sided connector further comprises: a plurality of third flow-dividing protrusions arranged between two adjacent second grooves along the second direction at intervals, and a third flow-dividing channel is formed between two adjacent third flow-dividing protrusions. Two adjacent second grooves are connected through the third flow-dividing channel.

[0013] Further, the third diverter channel includes a fifth diverter section, a sixth diverter section, and a seventh diverter section sequentially arranged along the first direction, and the cross-sectional area of ​​the sixth diverter section is smaller than the cross-sectional areas of the fifth diverter section and the seventh diverter section. In the first direction, the cross-sectional area of ​​the fifth diverter section is gradually increased from the sixth diverter section toward the fifth diverter section, and the cross-sectional area of ​​the seventh diverter section is gradually increased from the sixth diverter section toward the seventh diverter section.

[0014] In a second aspect, the present invention proposes a solid oxide battery stack, comprising a plurality of solid oxide cells and at least one double-sided connector as described above, wherein each of the first grooves of the double-sided connector accommodates one of the solid oxide cells, and each of the second grooves accommodates one of the solid oxide cells.

[0015] Furthermore, the solid oxide stack further includes a first single-sided connector and a second single-sided connector. In the thickness direction, the first single-sided connector is arranged facing the first surface of the bottom double-sided connector, and the surface structure of the first single-sided connector facing the first surface is the same as the surface structure of the second surface. In the thickness direction, the second single-sided connector is arranged facing the second surface of the top other double-sided connector, and the surface structure of the second single-sided connector facing the second surface is the same as the surface structure of the first surface.

[0016] Furthermore, the solid oxide stack further includes an end plate, which is arranged outside the first single-sided connector and the second single-sided connector in the thickness direction, and the two end plates are connected to clamp the first single-sided connector, the double-sided connector and the solid oxide battery thereon, and the second single-sided connector therebetween. An air intake duct, an air outlet duct, a gas intake duct, and a gas outlet duct are arranged on one of the end plates. The air channel inlet is connected to the air intake duct, the air channel outlet is connected to the air outlet duct, the gas channel inlet is connected to the gas intake duct, and the gas channel outlet is connected to the gas outlet duct.

[0017] Furthermore, the end plate provided with the air intake duct is provided with air intake holes and air intake distribution grooves, air outlet holes and air outlet distribution grooves, gas intake holes and gas intake distribution grooves, gas outlet holes and gas outlet distribution grooves. In the first direction, the cross section of the air intake distribution groove is reduced in the direction close to the air intake hole, and the cross section of the air outlet distribution groove is reduced in the direction close to the air outlet hole; in the second direction, the gas intake distribution grooves are provided on both sides of the gas intake hole, and the gas outlet distribution grooves are provided on both sides of the gas outlet hole.

[0018] The beneficial effects of the present invention are as follows:

[0019] In the solid oxide battery stack of the present application, a stacking arrangement of multiple layers of solid oxide cells can be achieved through a double-sided connector; at the same time, based on the multiple first grooves and multiple second grooves on both sides of the double-sided connector, a side-by-side arrangement of multiple solid oxide cells in each layer of cells can be achieved. Therefore, since the solid oxide cells are accommodated in the corresponding grooves and each layer of cells includes multiple solid oxide cells, the stacking height of the battery stack is reduced, the volume occupied by the battery stack is reduced, and the heat loss surface area of ​​the battery stack is reduced, thereby improving the space utilization rate, volume power ratio and energy utilization efficiency of the battery stack. Furthermore, in the second direction, the gas channel inlet and the gas channel outlet are arranged on both sides of each second groove so that each first groove has an independent gas inlet and outlet channel opening corresponding thereto, and in the first direction, the air channel inlet and the air channel outlet are arranged on both sides of multiple second grooves so that multiple second grooves share the same pair of air inlet and outlet channel openings, which simplifies the gas path connection of the gas and air, improves the gas inlet and outlet methods and air inlet and outlet methods of the fuel cell stack based on the optimized design of the gas channel inlet and outlet and the air channel inlet and outlet space layout, and improves the uniformity of the gas pressure when the gas flows through different solid oxide batteries, thereby reducing the risk of gas leakage and improving the utilization rate of the gas and air.

[0020] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a solid oxide battery stack of the present invention is shown;

[0023] Figure 2 A schematic diagram of an exploded view of a solid oxide battery stack of the present invention is shown;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of a double-sided connector of the present invention at one viewing angle is shown;

[0025] Figure 4 for Figure 3 A top view of

[0026] Figure 5 A schematic diagram of the three-dimensional structure of the double-sided connector of the present invention at another viewing angle is shown;

[0027] Figure 6 for Figure 5 Bottom view of

[0028] Figure 7 A schematic diagram of the three-dimensional structure of a first single-sided connector of the present invention is shown;

[0029] Figure 8 for Figure 7 A top view of

[0030] Fig. 9 A schematic diagram of the three-dimensional structure of a second single-sided connector of the present invention is shown;

[0031] Fig.10 for Fig. 9 A top view of

[0032] Fig.11 A schematic diagram of the three-dimensional structure of one of the end plates of the present invention is shown;

[0033] Fig.12 A three-dimensional structural schematic diagram of another end plate of the present invention is shown.

[0034] The reference numerals are as follows:

[0035] 100. Double-sided connector;

[0036] 10. Main body; 11. First surface; 12. Second surface; A1. Gas channel inlet; A2. Gas channel outlet; B1. Air channel inlet; B2. Air channel outlet; 20. First groove; 21. First main body section; 22. First support section; 30. Second groove; 40. First support protrusion; 50. First diverter protrusion; 60. Second support protrusion; 70. Second diverter protrusion; 80. Third diverter protrusion; 90. Extension; T1. First diverter channel; T11. First diverter section; T12. Second diverter section; T2. Second diverter channel; T21. Third diverter section; T22. Fourth diverter section; T3. Third diverter channel; T31. Fifth diverter section; T32. Sixth diverter section; T33. Seventh diverter section; E1. Inspection hole;

[0037] 200. Solid oxide battery;

[0038] 300. first single-sided connector; 400. second single-sided connector; F1. tab;

[0039] 500. end plate; 510. air inlet hole; 520. air inlet distribution slot; 530. air outlet hole; 540. air outlet distribution slot; 550. gas inlet hole; 560. gas inlet distribution slot; 570. gas outlet hole; 580. gas outlet distribution slot; C1. air inlet pipe; C2. air outlet pipe; D1. gas inlet pipe; D2. gas outlet pipe;

[0040] 600. Connecting assembly; 610. Long bolt; 620. Nut; 630. Ceramic tube;

[0041] 700. First gasket;

[0042] 800. Second gasket;

[0043] 900. Third gasket;

[0044] H. thickness direction; L1. first direction; L2. second direction. DETAILED DESCRIPTION

[0045] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0047] Refer to the following Figure 1-12 To describe the double-sided connector and solid oxide stack of the embodiments of the present application.

[0048] Reference Figure 1 and Figure 2 The solid oxide stack of the present application includes a plurality of solid oxide cells 200 and at least one double-sided connector 100 .

[0049] Specifically, the number of the double-sided interconnector 100 may be one or more. When the number of the double-sided interconnector 100 is multiple, the multiple double-sided interconnectors 100 are stacked and arranged along the thickness direction H thereof, and at least two solid oxide cells 200 are arranged between two adjacent double-sided interconnectors 100. That is, each layer of the stacked cells includes at least two solid oxide cells 200 arranged side by side.

[0050] Reference Figures 3 to 6 The double-sided connector 100 includes a body 10, a plurality of first grooves 20 and a plurality of second grooves 30. The plurality of first grooves 20 and the plurality of second grooves 30 are respectively arranged on both sides of the thickness direction H of the body 10, each first groove 20 accommodates at least part of a solid oxide battery 200, and each second groove 30 accommodates at least part of a solid oxide battery 200.

[0051] It should be noted that, for the same double-sided connector 100, the first groove 20 and the second groove 30 on both sides of the double-sided connector 100 respectively accommodate different solid oxide batteries 200; and for two adjacent double-sided connectors 100, the first groove 20 of one double-sided connector 100 and the second groove 30 of the other double-sided connector 100 are arranged opposite to each other and together accommodate the solid oxide batteries 200 in the corresponding layer. In other words, the solid oxide battery stack of the present application includes multiple battery layers stacked, and each battery layer includes at least two batteries.

[0052] The body 10 has a first surface 11 and a second surface 12 in the thickness direction H thereof, and a gas channel inlet A1, a gas channel outlet A2, an air channel inlet B1, and an air channel outlet B2 are provided through the body 10. The air channel inlet B1 and the air channel outlet B2 are formed at intervals on both sides of the body 10 along the first direction L1 of the body 10, and the gas channel inlet A1 and the gas channel outlet A2 are formed at intervals on both sides of the body 10 along the second direction L2 of the body 10.

[0053] The first surface 11 of the body 10 is recessed downward to form a plurality of first grooves 20 for accommodating the solid oxide battery 200. The plurality of first grooves 20 are arranged at intervals along the first direction L1 of the body 10 and are not interconnected. The gas channel inlet A1 and the gas channel outlet A2 are located on both sides of each second groove 30 in the second direction L2 of the body 10. That is, the gas flows into the plurality of first grooves 20 through the gas channel inlet A1 and then flows out through the gas channel outlet A2.

[0054] The second surface 12 of the body 10 is recessed downward to form a plurality of second grooves 30 for accommodating the solid oxide battery 200. The plurality of second grooves 30 are arranged at intervals in the first direction L1 and are interconnected. The air channel inlet B1 and the air channel outlet B2 are located on both sides of the plurality of second grooves 30 in the first direction L1, so that the air entering from the air channel inlet B1 enters the plurality of second grooves 30 in sequence and flows out through the air channel outlet B2. In other words, the plurality of second grooves 30 share the same pair of air inlet and outlet channels.

[0055] It can be understood that in the present invention, any first groove 20 corresponds to a gas channel inlet A1 and a gas channel outlet A2, and a plurality of second grooves 30 collectively correspond to an air channel inlet B1 and an air channel outlet B2.

[0056] In the solid oxide battery stack of the present application, the stacking arrangement of multiple layers of solid oxide cells 200 can be realized through the double-sided connector 100; at the same time, based on the multiple first grooves 20 and multiple second grooves 30 on both sides of the double-sided connector 100, the side-by-side arrangement of multiple solid oxide cells 200 in each layer of cells can be realized. Therefore, since the solid oxide cells 200 are accommodated in the corresponding grooves and each layer of cells includes multiple solid oxide cells 200, it reduces the stacking height of the battery stack, reduces the volume occupied by the battery stack, and reduces the heat loss surface area of ​​the battery stack, thereby improving the space utilization rate, volume power ratio and energy utilization efficiency of the battery stack.

[0057] Furthermore, in the second direction L2, the gas channel inlet A1 and the gas channel outlet A2 are arranged on both sides of each second groove 30, so that each first groove 20 has an independent gas inlet and outlet channel opening corresponding thereto, and in the first direction L1, the air channel inlet B1 and the air channel outlet B2 are arranged on both sides of multiple second grooves 30, so that multiple second grooves 30 share the same pair of air inlet and outlet channel openings, which simplifies the gas path connection of the gas and air, and based on the optimized design of the gas channel inlet and outlet and the air channel inlet and outlet spatial arrangement, improves the gas inlet and outlet method and the air inlet and outlet method of the fuel cell stack, and improves the uniformity of the gas pressure when the gas flows through different solid oxide batteries 200, thereby reducing the risk of gas leakage and improving the utilization rate of the gas and air.

[0058] It can be understood that the first direction L1 in the present application can be the length direction of the main body 10 (also known as the length direction of the battery stack), and the second direction L2 is the width direction of the main body 10 (also known as the width direction of the battery stack); of course, the first direction L1 in the present application can also be the width direction of the main body 10 (also known as the width direction of the battery stack), and the second direction L2 is the length direction of the main body 10 (also known as the length direction of the battery stack), and the present application does not make specific limitations.

[0059] In some embodiments, reference Figure 3 and Figure 4 The double-sided connector 100 further includes a plurality of first supporting protrusions 40 and a plurality of first diverter protrusions 50 .

[0060] A plurality of first support protrusions 40 are arranged in the first groove 20 at intervals along the first direction L1, and the plurality of first support protrusions 40 are arranged facing the corresponding solid oxide cells 200. The plurality of first support protrusions 40 can support the solid oxide cells 200 to maintain a good electrical connection between the solid oxide cells 200.

[0061] A plurality of first diverter protrusions 50 are arranged at intervals along the first direction L1 at one end of the first groove 20 close to the gas channel inlet A1 (to divert the gas when it enters the first groove 20) and / or at one end of the first groove 20 close to the gas channel outlet A2 (to divert the gas when it flows out of the first groove 20). The first diverter protrusions 50 are arranged at intervals along the second direction L2 with the first supporting protrusions 40, and a first diverter channel T1 is formed between two adjacent first diverter protrusions 50.

[0062] In this embodiment, based on the fact that a plurality of first diverter protrusions 50 are arranged at one end of the first groove 20 close to the gas channel inlet A1 and / or close to the gas channel outlet A2, the first diverter channel T1 between the first diverter protrusions 50 can enable the gas to flow toward different areas of the first groove 20 when entering through the gas channel inlet A1, thereby improving the flow uniformity of the gas inside the first groove 20; and based on the fact that a plurality of first support protrusions 40 are arranged at intervals at the bottom of the first groove 20, while supporting the solid oxide battery 200 and maintaining the electrical connection between the solid oxide battery 200 intact by the first support protrusions 40, the plurality of first support protrusions 40 divide the interior of the first groove 20 into a plurality of gas flow channels (a gas flow channel is formed between two adjacent first support protrusions 40), so that when the gas enters the first groove 20 through the first diverter channel T1, it can be evenly distributed to the plurality of gas flow channels, thereby further improving the flow uniformity of the gas in the first groove 20.

[0063] Therefore, based on the gas flow field composed of the gas channel inlet A1, multiple first branch channels T1, multiple gas circulation channels and the gas channel outlet A2 in the present application, the gas can flow evenly to different areas of the solid oxide battery 200, thereby significantly improving the utilization rate of the gas by the solid oxide battery 200.

[0064] In some embodiments, reference Figure 4 The first flow diversion channel T1 includes a first flow diversion section T11 and a second flow diversion section T12 sequentially arranged along the second direction L2, and the cross-sectional area of ​​the first flow diversion section T11 is smaller than the cross-sectional area of ​​the second flow diversion section T12. In addition, in the second direction L2, the cross-sectional area of ​​the second flow diversion section T12 gradually increases from the first flow diversion section T11 toward the first supporting protrusion 40 (that is, the second flow diversion section T12 is a trumpet-shaped structure).

[0065] In this embodiment, based on the fact that the cross-sectional area of ​​the first diverter section T11 is smaller than the cross-sectional area of ​​the second diverter section T12, and in the second direction L2, the cross-sectional area of ​​the second diverter section T12 is gradually increased from the first diverter section T11 toward the first support protrusion 40, the cross-sectional area of ​​the outlet end of the first diverter channel T1 is increased, so that the flow velocity of the gas after entering the second diverter section T12 is reduced and can be diffused toward a larger spatial area, thereby ensuring that the gas distributed through multiple first diverter channels T1 can enter each gas flow channel in the first groove 20, thereby further improving the flow uniformity of the gas in the first groove 20.

[0066] In some embodiments, reference Figure 4The width of the first diverter protrusion 50 in the first direction L1 is greater than the width of the first support protrusion 40 in the first direction L1. This configuration enables the present application to distribute gas to multiple gas flow channels through a first diverter channel T1, thereby improving gas distribution efficiency.

[0067] In some embodiments, reference Figure 4 The cross section of the first diverter protrusion 50 at one end close to the first support protrusion 40 is reduced in the second direction L2 toward the first support protrusion 40, so that the second diverter section T12 is formed into a trumpet-shaped structure. In addition, the surface of the first diverter protrusion 50 facing the first support protrusion 40 is an arc surface, so that the gas can flow smoothly into the first groove 20.

[0068] In some embodiments, reference Figure 4 The first groove 20 includes a first main body section 21 and first support sections 22 located on both sides of the first main body section 21 in the first direction L1. A plurality of first support protrusions 40 are disposed in the first main body section 21, and the support surface of the first support protrusion 40 is flush with the support surface of the first support section 22.

[0069] In this embodiment, the first support segments 22 on both sides support the solid oxide cell 200 together with a plurality of first support protrusions 40. The plurality of first support protrusions 40 maintain an intact electrical connection between the solid oxide cells 200 when supporting the solid oxide cells 200, and the first support segments 22 can be connected to the solid oxide cell 200 by welding or bonding to form a seal, thereby improving the connection stability of the solid oxide cell 200 in the first groove 20.

[0070] In some embodiments, reference Figure 5 and Figure 6 The double-sided connector 100 further includes a plurality of second supporting protrusions 60 and a plurality of second diverter protrusions 70 .

[0071] A plurality of second supporting protrusions 60 are arranged in the second groove 30 at intervals along the second direction L2, and the plurality of second supporting protrusions 60 are arranged facing the corresponding solid oxide cells 200. The plurality of second supporting protrusions 60 can support the solid oxide cells 200 to maintain a good electrical connection between the solid oxide cells 200.

[0072] A plurality of second diverter protrusions 70 are disposed at intervals along the second direction L2 at one end of the second groove 30 close to the air channel inlet B1 (to divert air when the air enters the first groove 20) and / or at one end of the second groove 30 close to the air channel outlet B2 (to divert air when the air flows out of the first groove 20). The second diverter protrusions 70 are disposed at intervals along the first direction L1 with the second supporting protrusions 60, and a second diverter channel T2 is formed between two adjacent second diverter protrusions 70.

[0073] In this embodiment, based on the fact that a plurality of second diverter protrusions 70 are provided at one end of the second groove 30 near the air channel inlet B1 and / or near the air channel outlet B2, the second diverter channel T2 between the second diverter protrusions 70 can enable the air to flow toward different areas of the second groove 30 when entering through the air channel inlet B1, thereby improving the uniformity of air flow inside the second groove 30; and, based on the fact that a plurality of second support protrusions 60 are provided at intervals at the bottom of the second groove 30, while supporting the solid oxide battery 200 and maintaining an intact electrical connection between the solid oxide batteries 200 through the second support protrusions 60, the plurality of second support protrusions 60 divide the interior of the second groove 30 into a plurality of air circulation channels (an air circulation channel is formed between two adjacent second support protrusions 60), so that when the air enters the second groove 30 through the second diverter channel T2, it can be evenly distributed to the plurality of air circulation channels, thereby further improving the uniformity of air flow in the second groove 30.

[0074] Therefore, based on the air flow field composed of the air channel inlet B1, multiple second diversion channels T2, multiple air circulation channels and the air channel outlet B2 in the present application, the air can flow evenly to different areas of the solid oxide battery 200, thereby significantly improving the utilization rate of the air by the solid oxide battery 200.

[0075] In some embodiments, reference Figure 6 The second flow diversion channel T2 includes a third flow diversion section T21 and a fourth flow diversion section T22 arranged in sequence along the first direction L1, and the cross-sectional area of ​​the third flow diversion section T21 is smaller than the cross-sectional area of ​​the fourth flow diversion section T22. In addition, in the first direction L1, the cross-sectional area of ​​the fourth flow diversion section T22 is gradually increased from the third flow diversion section T21 toward the second support protrusion 60 (that is, the fourth flow diversion section T22 is a trumpet-shaped structure).

[0076] In this embodiment, based on the fact that the cross-sectional area of ​​the third diversion section T21 is smaller than the cross-sectional area of ​​the fourth diversion section T22, and in the first direction L1, the cross-sectional area of ​​the fourth diversion section T22 is gradually increased from the third diversion section T21 toward the second support protrusion 60, the cross-sectional area of ​​the outlet end of the second diversion channel T2 is increased, so that the flow velocity of the air after entering the fourth diversion section T22 is reduced and can be diffused toward a larger spatial area, thereby ensuring that the air distributed through multiple second diversion channels T2 can enter each air circulation channel in the second groove 30, thereby further improving the flow uniformity of the air in the second groove 30.

[0077] In some embodiments, reference Figure 6 The width of the second diverter protrusion 70 in the second direction L2 is greater than the width of the second support protrusion 60 in the second direction L2. This configuration enables the present application to distribute air to multiple air circulation channels through a second diverter channel T2, thereby improving air distribution efficiency and gas utilization.

[0078] In some embodiments, reference Figure 6 The cross section of the second diverter protrusion 70 at one end close to the second support protrusion 60 is reduced in the first direction L1 toward the second support protrusion 60, so that the fourth diverter section T22 is formed into a trumpet-shaped structure. In addition, the surface of the second diverter protrusion 70 facing the second support protrusion 60 is an arc surface, so that the air can flow smoothly into the second groove 30.

[0079] In some embodiments, reference Figure 5 and Figure 6 The double-sided connector 100 further includes a plurality of third diverter protrusions 80, which are arranged between two adjacent second grooves 30 along the second direction L2, and a third diverter channel T3 is formed between two adjacent third diverter protrusions 80. The two adjacent second grooves 30 are connected through the third diverter channel T3.

[0080] In this embodiment, the plurality of second grooves 30 are sequentially connected to each other in the first direction L1 and form a layer of continuous long groove structure, and the continuous long groove structure is divided into a plurality of second grooves 30 by the third diverter protrusion 80, and two adjacent second grooves 30 are connected by the third diverter channel T3. In this way, through the plurality of third diverter protrusions 80 between two adjacent second grooves 30, the air flowing out of one of the second grooves 30 can be redistributed through the plurality of third diverter channels T3 and then enter the other second groove 30, thereby ensuring that the air can be evenly distributed to each second groove 30, thereby significantly improving the utilization rate of the air by the solid oxide battery 200.

[0081] In some embodiments, reference Figure 6 The third diversion channel T3 includes a fifth diversion segment T31, a sixth diversion segment T32 and a seventh diversion segment T33 which are sequentially arranged along the first direction L1.

[0082] The cross-sectional area of ​​the sixth flow diversion section T32 is smaller than the cross-sectional areas of the fifth flow diversion section T31 and the seventh flow diversion section T33. In the first direction L1, the cross-sectional area of ​​the fifth flow diversion section T31 is gradually increased from the sixth flow diversion section T32 toward the fifth flow diversion section T31, and the cross-sectional area of ​​the seventh flow diversion section T33 is gradually increased from the sixth flow diversion section T32 toward the seventh flow diversion section T33.

[0083] In this embodiment, based on the fact that the cross-sectional area of ​​the sixth diversion section T32 is smaller than the cross-sectional areas of the fifth diversion section T31 and the seventh diversion section T33, and in the first direction L1, the cross-sectional area of ​​the fifth diversion section T31 is gradually increased from the sixth diversion section T32 toward the fifth diversion section T31, and the cross-sectional area of ​​the seventh diversion section T33 is gradually increased from the sixth diversion section T32 toward the seventh diversion section T33, then by increasing the cross-sectional areas of the inlet and outlet ends of the second diversion channel T2, the air in the multiple air circulation channels in one of the adjacent second grooves 30 can converge to the fifth diversion section T31, and can flow out through the sixth diversion section T32 and then diffuse toward a larger spatial area through the seventh diversion section T33, thereby ensuring that the air between two adjacent second grooves 30 can be redistributed through multiple third diversion channels T3 and then evenly enter another adjacent second groove 30, thereby further improving the uniformity of air flow between multiple second grooves 30.

[0084] In some embodiments, reference Figures 3 to 6 The double-sided connector 100 is also provided with a plurality of inspection holes E1, which are arranged at intervals along the first direction L1, and each inspection hole E1 is arranged corresponding to a solid oxide battery 200, so as to detect the voltage of each layer of solid oxide battery 200. Specifically, the double-sided connector 100 includes an extension portion 90 protruding from the main body 10 in the second direction L2, and the inspection hole E1 is arranged through the extension portion 90. In order to facilitate the installation of the inspection line, the inspection line alternately connects the inspection holes of two adjacent connectors.

[0085] In the present invention, the first support protrusion 40 and the second support protrusion 60 are vertically arranged so that the air flow channel and the gas flow channel divided on the main body 10 are vertical, and the gas entering the solid oxide battery 200 crosses vertically, so that the gas and air react fully and the gas utilization rate is improved.

[0086] In some embodiments, reference Figure 1 , Figure 2 as well as Figures 7 to 10The solid oxide stack further includes a first single-sided interconnector 300 and a second single-sided interconnector 400 .

[0087] In the thickness direction H, the first single-sided connector 300 is located on the outside of the outermost double-sided connector 100, and the first single-sided connector 300 is arranged facing the first surface 11 of the double-sided connector 100, and the surface structure of the first single-sided connector 300 facing the first surface 11 of the double-sided connector 100 is the same as the surface structure of the second surface 12 of the double-sided connector 100.

[0088] That is, the first single-sided connector 300 is located at one end of the stacked multi-layer battery. The first single-sided connector 300 is not provided with a gas channel inlet A1 and a gas channel outlet A2, and the air channel inlet B1 and the air channel outlet B2 on the first single-sided connector 300 are groove structures rather than through structures. Since the first single-sided connector 300 is used to only air the solid oxide battery 200 thereon, the first single-sided connector 300 can be called an air single-sided connector.

[0089] In the thickness direction H, the second single-sided connector 400 is located on the outside of the other outermost double-sided connector 100, and the second single-sided connector 400 is arranged facing the second surface 12 of the double-sided connector 100, and the surface structure of the second single-sided connector 400 facing the second surface 12 of the double-sided connector 100 is the same as the surface structure of the first surface 11 of the double-sided connector 100.

[0090] That is, the second single-sided interconnector 400 is located at the other end of the stacked multi-layer battery. Since the second single-sided interconnector 400 is only used to supply gas to the solid oxide battery 200 thereon, the second single-sided interconnector 400 can be called a gas single-sided interconnector.

[0091] In this embodiment, based on the arrangement of the first single-sided connector 300 and the second single-sided connector 400, air distribution to the battery layer at one end can be achieved through the first single-sided connector 300, and gas distribution to the battery layer at the other end can be achieved through the second single-sided connector 400, thereby ensuring that the stacked multiple battery layers can be allocated with air and gas, so that all the solid oxide batteries 200 in the present application can be fully utilized, thereby ensuring the energy density of the solid oxide stack of the present application.

[0092] In some embodiments, Figures 7 to 10 The first single-sided connector 300 and the second single-sided connector 400 are both provided with tabs F1. The tabs F1 of one of the first single-sided connector 300 and the second single-sided connector 400 are positive tabs, and the tabs F1 of the other are negative tabs, so as to realize the output of the battery stack.

[0093] In some embodiments, reference Figure 1 , Figure 2 as well as Fig.11 and Fig.12 The solid oxide stack further includes an end plate 500, which is disposed outside the first single-sided interconnector 300 and the second single-sided interconnector 400 in the thickness direction H. The two end plates 500 are connected to each other to clamp the first single-sided interconnector 300, the double-sided interconnector 100 and the solid oxide cells 200 thereon and the second single-sided interconnector 400 therebetween.

[0094] One of the end plates 500 (called the air intake side end plate) is provided with an air intake duct C1, an air outlet duct C2, a gas intake duct D1, and a gas outlet duct D2, while the other end plate 500 (called the blind end end plate) is not provided with an air intake duct C1, an air outlet duct C2, a gas intake duct D1, and a gas outlet duct D2.

[0095] Among them, the air intake duct C1 is connected to the air channel inlet B1 on the second single-sided connector 400, the air channel inlet B1 on each double-sided connector 100 and the air channel inlet B1 on the first single-sided connector 300, and the air outlet duct C2 is connected to the air channel outlet B2 on the second single-sided connector 400, the air channel outlet B2 on each double-sided connector 100 and the air channel outlet B2 on the first single-sided connector 300.

[0096] The gas inlet pipe D1 is connected to the gas channel inlet A1 on the second single-sided connector 400 and the gas channel inlet A1 on each double-sided connector 100, and the gas outlet pipe D2 is connected to the gas channel outlet A2 on the second single-sided connector 400 and the gas channel outlet A2 on each double-sided connector 100.

[0097] The air intake side end plate (the end plate 500 provided with air inlet and outlet pipes) is provided with air inlet holes 510 and air inlet distribution grooves 520, air outlet holes 530 and air outlet distribution grooves 540, gas inlet holes 550 and gas inlet distribution grooves 560, gas outlet holes 570 and gas outlet distribution grooves 580.

[0098] In the first direction L1 , the cross section of the air inlet distribution groove 520 is reduced toward the direction close to the air inlet hole 510 , and the cross section of the air outlet distribution groove 530 is reduced toward the direction close to the air outlet hole 540 .

[0099] Based on the cross-section of the air inlet distribution groove 520 being reduced in the direction close to the air inlet hole 510, it can be ensured that the air entering from the air inlet duct C1 and the air inlet hole 510 can be diffused in the air inlet distribution groove 520 along the second direction L2, so as to smoothly enter the second groove 30 through the plurality of first diversion channels T1. At the same time, based on the cross-section of the air outlet distribution groove 530 being reduced in the direction close to the air outlet hole 540, it can be ensured that the air flowing out from the air channel outlet B2 in the second groove 30 can be gradually gathered to the air outlet hole 540 through the air outlet distribution groove 530 for discharge.

[0100] In the second direction L2 , the gas inlet distribution grooves 560 are arranged on both sides of the gas inlet hole 550 , and the gas outlet distribution grooves 580 are arranged on both sides of the gas outlet hole 570 .

[0101] Based on the gas inlet distribution grooves 560 on both sides of the gas inlet hole 550, the gas can be distributed to each first groove 20 on each double-sided connector 100; based on the gas outlet distribution grooves 580 on both sides of the gas outlet hole 570, the gas in multiple first grooves 20 on each double-sided connector 100 can be introduced into the gas outlet hole 570 for discharge, thereby realizing the entry and exit of gas in the fuel cell stack.

[0102] In some embodiments, reference Figure 1 and Figure 2 , the four corners of the two end plates 500 are respectively provided with connection holes. The solid oxide stack also includes a connection assembly 600, and the two end plates 500 are connected to each other through the connection holes and the connection assembly 600 thereon. Specifically, the connection assembly 600 includes a long bolt 610 passing through the connection hole, a nut 620 locked and connected to the long bolt 610, and a ceramic tube 630, and the long bolt 610 is passed through the ceramic tube 630, thereby realizing the locking of the stack through the two end plates 500 and multiple connection assemblies 600. Among them, the ceramic tube 630 is used for positioning and insulation of the double-sided connector 100.

[0103] In some embodiments, reference Figure 1 and Figure 2 A first insulating gasket 700 is disposed between the second single-sided connector 400 and the corresponding end plate 500. The first insulating gasket 700 is provided with a gas channel inlet A1, a gas channel outlet A2, an air channel inlet B1 and an air channel outlet B2.

[0104] In some embodiments, reference Figure 1 and Figure 2A second insulating gasket 800 is disposed between two adjacent double-sided connectors 100, between the first single-sided connector 300 and the corresponding double-sided connector 100, and between the second single-sided connector 400 and the corresponding double-sided connector 100. The second insulating gasket 800 is provided with a gas channel inlet A1, a gas channel outlet A2, an air channel inlet B1, and an air channel outlet B2, and the second gasket 800 is also provided with a through-hole structure corresponding to the solid oxide fuel cell 200.

[0105] In some embodiments, reference Figure 1 and Figure 2 A third insulating gasket 900 is disposed between the first single-sided connector 300 and the corresponding end plate 500. The third insulating gasket 900 is not provided with a gas channel inlet A1, a gas channel outlet A2, an air channel inlet B1, and an air channel outlet B2.

[0106] Based on the arrangement of the first insulating gasket 700, the second insulating gasket 800 and the third insulating gasket 900, the gas and air corresponding to each layer of batteries can be isolated to prevent leakage and cross-gas. Specifically, the first insulating gasket 700, the second insulating gasket 800 and the third insulating gasket 900 can be made of materials such as mica or vermiculite.

[0107] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A double-sided connector (100), characterized in that: Applications in solid oxide batteries, including: A body (10) having a first surface (11) and a second surface (12) which are parallel and opposite to each other in a thickness direction (H) thereof, and the body (10) is provided with a gas channel inlet (A1), a gas channel outlet (A2), an air channel inlet (B1) and an air channel outlet (B2) therethrough, the air channel inlet (B1) and the air channel outlet (B2) being formed at intervals on both sides of the body (10) along a first direction (L1) of the body (10), and the gas channel inlet (A1) and the gas channel outlet (A2) being formed at intervals on both sides of the body (10) along a second direction (L2) of the body (10); a plurality of first grooves (20), which are recessed downward from the first surface (11) and are used to accommodate at least part of the solid oxide battery (200), and the plurality of first grooves (20) are arranged at intervals along the first direction (L1), and any first groove (20) has the gas channel inlet (A1) and the gas channel outlet (A2) on both sides along the second direction (L2), respectively, and the gas flows into the first groove (20) from the gas channel inlet (A1) and flows out through the gas channel outlet (A2); and a plurality of second grooves (30), which are recessed downward from the second surface (12) and are used to accommodate at least part of the solid oxide battery (200); the second grooves (30) are arranged corresponding to the first grooves (20); the plurality of second grooves (30) are interconnected; the plurality of second grooves (30) collectively correspond to one air channel inlet (B1) and one air channel outlet (B2); air flows into the second grooves (30) from the air channel inlet (B1) and flows out through the air channel outlet (B2); Wherein, the second direction (L2) is perpendicular to the first direction (L1).

2. The double-sided connector (100) according to claim 1, characterized in that: The double-sided connector (100) further comprises: A plurality of first supporting protrusions (40) are arranged in the first groove (20) at intervals along the first direction (L1) and are arranged facing the corresponding solid oxide battery (200); a plurality of first flow-dividing protrusions (50) arranged at intervals along the first direction (L1) at an end of the first groove (20) close to the gas channel inlet (A1) and / or at an end of the first groove (20) close to the gas channel outlet (A2); The first flow-dividing protrusion (50) is arranged spaced apart from the first supporting protrusion (40) along the second direction (L2), and a first flow-dividing channel (T1) is formed between two adjacent first flow-dividing protrusions (50).

3. The double-sided connector (100) according to claim 2, characterized in that: The first flow diversion channel (T1) comprises a first flow diversion section (T11) and a second flow diversion section (T12) arranged in sequence along the second direction (L2), and the cross-sectional area of ​​the first flow diversion section (T11) is smaller than the cross-sectional area of ​​the second flow diversion section (T12); In the second direction (L2), the cross-sectional area of ​​the second flow diversion section (T12) is gradually increased in a direction from the first flow diversion section (T11) toward the first supporting protrusion (40).

4. The double-sided connector (100) according to claim 3, characterized in that: The first groove (20) comprises a first main body section (21) and first supporting sections (22) located on both sides of the first main body section (21) in the first direction (L1); A plurality of the first supporting protrusions (40) are arranged in the first main body section (21), and the supporting surfaces of the first supporting protrusions (40) are arranged flush with the supporting surface of the first supporting section (22).

5. The double-sided connector (100) according to claim 1, characterized in that: The double-sided connector (100) further comprises: A plurality of second supporting protrusions (60) are arranged in the second groove (30) at intervals along the second direction (L2) and are arranged facing the corresponding solid oxide battery (200); a plurality of second flow-dividing protrusions (70) arranged at intervals along the second direction (L2) at an end of the second groove (30) close to the air channel inlet (B1) and / or at an end of the second groove (30) close to the air channel outlet (B2); The second flow-dividing protrusion (70) is arranged at a distance from the second supporting protrusion (60) along the first direction (L1), and a second flow-dividing channel (T2) is formed between two adjacent second flow-dividing protrusions (70).

6. The double-sided connector (100) according to claim 5, characterized in that: The second flow diversion channel (T2) comprises a third flow diversion section (T21) and a fourth flow diversion section (T22) arranged in sequence along the first direction (L1), and the cross-sectional area of ​​the third flow diversion section (T21) is smaller than the cross-sectional area of ​​the fourth flow diversion section (T22); In the first direction (L1), the cross-sectional area of ​​the fourth diverter section (T22) is gradually increased in a direction from the third diverter section (T21) toward the second supporting protrusion (60).

7. The double-sided connector (100) according to claim 2, characterized in that: The double-sided connector (100) further comprises: a plurality of third flow-dividing protrusions (80) arranged at intervals between two adjacent second grooves (30) along the second direction (L2), and a third flow-dividing channel (T3) is formed between two adjacent third flow-dividing protrusions (80); Two adjacent second grooves (30) are connected via the third flow diversion channel (T3).

8. The double-sided connector (100) according to claim 7, characterized in that: The third flow diversion channel (T3) comprises a fifth flow diversion section (T31), a sixth flow diversion section (T32) and a seventh flow diversion section (T33) which are sequentially arranged along the first direction (L1), and the cross-sectional area of ​​the sixth flow diversion section (T32) is smaller than the cross-sectional areas of the fifth flow diversion section (T31) and the seventh flow diversion section (T33); In the first direction (L1), the cross-sectional area of ​​the fifth diversion section (T31) is gradually increased from the sixth diversion section (T32) toward the fifth diversion section (T31), and the cross-sectional area of ​​the seventh diversion section (T33) is gradually increased from the sixth diversion section (T32) toward the seventh diversion section (T33).

9. A solid oxide fuel cell stack, characterized in that: It comprises a plurality of solid oxide cells (200) and at least one double-sided interconnector (100) according to any one of claims 1 to 8, wherein each of the first grooves (20) of the double-sided interconnector (100) accommodates one of the solid oxide cells (200), and each of the second grooves (30) accommodates one of the solid oxide cells (200).

10. The solid oxide fuel cell stack according to claim 9, characterized in that: The solid oxide battery stack further includes a first single-sided connector (300) and a second single-sided connector (400); In the thickness direction (H), the first single-sided connector (300) is arranged facing the first surface (11) of the bottommost double-sided connector (100), and the surface structure of the first single-sided connector (300) facing the first surface (11) is the same as the surface structure of the second surface (12); In the thickness direction (H), the second single-sided connector (400) is arranged facing the second surface (12) of the topmost double-sided connector (100), and the surface structure of the second single-sided connector (400) facing the second surface (12) is the same as the surface structure of the first surface (11).

11. The solid oxide fuel cell stack according to claim 10, characterized in that: The solid oxide battery stack further comprises an end plate (500), the end plate (500) being arranged outside the first single-sided connector (300) and the second single-sided connector (400) in the thickness direction (H), and the two end plates (500) being connected to clamp the first single-sided connector (300), the double-sided connector (100) and the solid oxide battery (200) and the second single-sided connector (400) thereon; An air inlet pipe (C1), an air outlet pipe (C2), a gas inlet pipe (D1), and a gas outlet pipe (D2) are provided on one of the end plates (500); The air channel inlet (B1) is in communication with the air intake duct (C1), and the air channel outlet (B2) is in communication with the air outlet duct (C2); The gas channel inlet (A1) is in communication with the gas inlet pipeline (D1), and the gas channel outlet (A2) is in communication with the gas outlet pipeline (D2).

12. The solid oxide fuel cell stack according to claim 11, characterized in that: The end plate (500) provided with the air intake duct (C1) is provided with an air intake hole (510) and an air intake distribution groove (520), an air outlet hole (530) and an air outlet distribution groove (540), a gas intake hole (550) and a gas intake distribution groove (560), a gas outlet hole (570) and a gas outlet distribution groove (580); In the first direction (L1), the cross section of the air inlet distribution groove (520) is arranged to decrease in a direction approaching the air inlet hole (510), and the cross section of the air outlet distribution groove (530) is arranged to decrease in a direction approaching the air outlet hole (540); In the second direction (L2), the gas inlet distribution grooves (560) are arranged on both sides of the gas inlet hole (550), and the gas outlet distribution grooves (580) are arranged on both sides of the gas outlet hole (570).

Images