A dual cathode battery based on a new anode support structure and a stack thereof

Abstract

The utility model discloses a kind of double-cathode battery and its electric pile based on new anode support structure, comprising: first battery unit, second battery unit and anode connecting piece;First battery unit and second battery unit are symmetrically arranged relative to anode connecting piece;First battery unit includes first anode support body, and second battery unit includes second anode support body, and first anode support body and second anode support body respectively cover the upper and lower end surfaces of anode connecting piece, multiple flow channel grooves are equipped on the end surface of first anode support body close to anode connecting piece, multiple flow channel grooves are equipped on the end surface of second anode support body close to anode connecting piece, multiple flow channel grooves on first anode support body and multiple flow channel grooves on second anode support body are symmetrically arranged relative to anode connecting piece.The utility model solves the technical problem that traditional double-cathode solid oxide fuel cell is difficult to lead out anode, reaches the technical effect that anode is conveniently led out.

Description

Technical Field

[0001] This utility model relates to the field of solid oxide fuel cell technology, specifically to a dual-cathode battery and its stack based on a novel anode support structure. Background Technology

[0002] Solid oxide fuel cells are energy conversion devices that can directly convert chemical energy into electrical energy. Solid oxide fuel cells have advantages such as high energy conversion efficiency and environmental friendliness, and therefore have attracted widespread attention from researchers.

[0003] Traditional solid oxide fuel cells have an anode layer-electrolyte layer-cathode layer structure. The anode layer is usually covered on the surface of a ceramic anode support to form the anode of the battery. A metal connector is usually set on the other side of the anode support to facilitate the anode lead-out.

[0004] Compared to traditional single-cathode solid oxide fuel cells, dual-cathode solid oxide fuel cells employ a symmetrical dual-cathode structure, supported by a porous anode support. Both the upper and lower surfaces are covered with an anode layer, an electrolyte layer, and a cathode layer, forming a symmetrical "cathode-electrolyte-anode-electrolyte-cathode" structure. Because both surfaces of the anode support in a dual-cathode solid oxide fuel cell are covered with anode, electrolyte, and cathode layers, it is impossible to directly install metal connectors on the surface of the anode support. It is also difficult to directly lead the anode out from the ceramic anode support. At the same time, since the fuel channel of the support is located in the middle, if the anode is replaced by an "anode-connector-anode" method, the thickness of the anode support itself will result in an excessively thick anode, leading to a decrease in fuel cell performance.

[0005] Therefore, it is necessary to design a dual-cathode solid oxide fuel cell that allows for easy anode extraction. Utility Model Content

[0006] This application provides a dual-cathode battery and its stack based on a novel anode support structure, which solves the technical problem that it is difficult to extract the anode in traditional dual-cathode solid oxide fuel cells.

[0007] This application provides a dual-cathode battery based on a novel anode support structure, comprising: a first battery unit, a second battery unit, and an anode connector; the first battery unit and the second battery unit are symmetrically arranged relative to the anode connector; the first battery unit includes a first anode support, and the second battery unit includes a second anode support, the first anode support and the second anode support respectively cover the upper and lower end faces of the anode connector; the end face of the first anode support near the anode connector is provided with multiple flow channel grooves, and the end face of the second anode support near the anode connector is also provided with multiple flow channel grooves; the multiple flow channel grooves on the first anode support and the multiple flow channel grooves on the second anode support are symmetrically arranged relative to the anode connector.

[0008] By adopting the above technical solution, the first battery unit and the second battery unit are symmetrically arranged on the anode connector, and the first anode support and the second anode support are respectively covered on the upper and lower end faces of the anode connector. Thus, while maintaining the symmetrical structure of the dual cathode, the problem that it is difficult to directly draw the anode from the ceramic anode support in traditional dual cathode batteries is solved. Furthermore, the structure of the flow channel groove on the end face of the support avoids the excessive overall anode thickness and performance degradation caused by the "anode-connector-anode" structure, thereby achieving effective extraction of anode current and maintaining the compactness of the battery.

[0009] Preferably, multiple flow channels are spaced apart along the width direction of the first anode support. The multiple flow channels include a straight group and two curved groups. The straight group includes at least one straight groove, and the straight grooves in the straight group are symmetrically arranged with respect to the longitudinal centerline of the first anode support. The two curved groups each include at least one curved groove. The two curved groups are arranged on both sides of the straight group, and the two curved groups are symmetrically arranged with respect to the longitudinal centerline of the first anode support.

[0010] By adopting the above technical solution, a set of straight grooves and two sets of curved grooves are set in the width direction of the first anode support. This mixed flow channel layout can optimize the flow distribution of fuel gas inside the anode support. The straight grooves in the central area provide a low-resistance mainstream channel, while the curved grooves on both sides can guide the gas to diffuse more evenly to the edge area of ​​the support, effectively increasing the contact area between the gas and the electrode, thereby improving the reaction efficiency and the overall performance of the battery.

[0011] Preferably, each flow channel groove is a curved groove, and multiple curved grooves are spaced apart along the width direction of the first anode support.

[0012] By adopting the above technical solution, all the flow channels on the first anode support are set as curved channels to form a full curved flow field, which can significantly extend the flow path and residence time of fuel gas inside the anode support, promote the uniform penetration and diffusion of gas in the porous anode layer, and at the same time, the curved flow helps to enhance gas disturbance, thereby improving fuel utilization and further improving battery performance.

[0013] Preferably, the anode connector covers the flow path of all flow channel slots.

[0014] By adopting the above technical solution, the anode connector completely covers the entire stroke of all flow channel grooves, so that the anode connector not only plays the role of conductive connection, but also acts as a cover plate for the flow channel grooves. Together with the anode support, it forms a closed fuel gas channel, effectively preventing gas leakage, ensuring that the fuel gas flows efficiently in the designed flow channel and fully contacts the electrode. At the same time, it ensures that the anode connector can collect all the current generated in the area covered by the flow channel groove, realizing efficient current collection and discharge.

[0015] Preferably, each curved groove includes two straight grooves and one curved groove. The two straight grooves are connected to both ends of the curved groove, and the two straight grooves are coaxially arranged.

[0016] By adopting the above technical solution, the curved channel adopts a structure in which straight sections at both ends connect to a curved section in the middle. The straight sections at both ends are located on the same straight line, which ensures that the flow direction of the gas is stable and smooth when entering and leaving, so that the gas can transition to the curved section more evenly, and optimizes the overall flow efficiency and mixing effect of the curved channel.

[0017] Preferably, the concave surface of each curved groove is oriented toward the longitudinal centerline of the first anode support.

[0018] By adopting the above technical solution, the curved grooves of each groove are concave towards the longitudinal centerline of the first anode support, so that the vortices generated by the curved grooves on both sides are directed towards the central straight flow channel. This centripetal disturbance design can more effectively converge the mixed gas on both sides towards the central mainstream area, and promote the gas between different flow channels to fully mix through the pores in the support body, thereby eliminating the concentration gradient to the greatest extent and achieving a highly uniform fuel gas distribution, improving the reaction efficiency and operational stability of the solid oxide fuel cell.

[0019] Preferably, each straight groove extends along the length of the first anode support, with the extension direction of the straight groove as the longitudinal direction, and each curved groove is mirror-symmetrical about the transverse centerline of the first anode support.

[0020] By adopting the above technical solution, the upper and lower symmetrical arrangement of the curved channel makes the flow channel design more in line with the requirements of fluid dynamics symmetry, ensuring that the gas flow characteristics on both sides are consistent, avoiding uneven local flow of fuel gas caused by asymmetrical design. At the same time, the symmetrical design simplifies the manufacturing of the mold and is conducive to large-scale production.

[0021] This application provides a dual-cathode battery stack based on a novel anode support structure, comprising: a plurality of dual-cathode batteries based on the novel anode support structure, wherein the plurality of dual-cathode batteries based on the novel anode support structure are stacked sequentially from bottom to top.

[0022] By adopting the above technical solution, multiple dual-cathode cells are stacked sequentially from top to bottom to form a fuel cell stack. The symmetrical structure of each dual-cathode cell and the optimized flow field design ensure the uniform distribution of current and gas flow within the stack, ultimately realizing a high-power, high-performance, and compact dual-cathode solid oxide fuel cell stack.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0024] 1. The first and second battery units are symmetrically arranged on the anode connector, and the first and second anode supports are respectively covered on the upper and lower end faces of the anode connector. This solves the problem that traditional dual-cathode batteries cannot directly draw the anode from the ceramic anode support while maintaining the symmetrical structure of the dual cathode. Furthermore, the structure with the flow channel groove on the end face of the support avoids the excessive overall anode thickness and performance degradation caused by the "anode-connector-anode" structure, thus achieving effective extraction of anode current and maintaining the compactness of the battery.

[0025] 2. The anode connector completely covers the entire stroke of all flow channel grooves, so that the anode connector not only serves as a conductive connection, but also acts as a cover plate for the flow channel grooves. Together with the anode support, it forms a closed fuel gas channel, effectively preventing gas leakage and ensuring that the fuel gas flows efficiently in the designed flow channel and fully contacts the electrode. At the same time, it ensures that the anode connector can collect all the current generated in the area covered by the flow channel groove, achieving efficient current collection and discharge.

[0026] 3. The curved grooves of each groove are concave towards the longitudinal centerline of the first anode support, so that the vortices generated by the curved grooves on both sides are directed towards the central straight flow channel. This centripetal disturbance design can more effectively gather the mixed gas on both sides towards the central mainstream area, and promote the gas between different flow channels to fully mix through the pores in the support body, thereby eliminating the concentration gradient to the greatest extent, thus achieving a highly uniform fuel gas distribution and improving the reaction efficiency and operating stability of the solid oxide fuel cell.

[0027] 4. The input fuel gas flows in an orderly laminar flow state, which improves the combustion efficiency of the fuel gas. In addition, the free design of the fuel channel effectively eliminates the temperature unevenness in the battery reaction zone, thus achieving the technical effect of improving local overheating failure. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An isometric view of a dual-cathode battery based on a novel anode support structure provided in this application;

[0030] Figure 2 A front view of the anode support of a dual-cathode battery based on a novel anode support structure provided in this application, which has straight grooves and curved grooves;

[0031] Figure 3 A front view of the anode support of a dual-cathode battery based on a novel anode support structure provided in this application, showing a curved groove.

[0032] Figure 4 An isometric view of a dual-cathode battery stack based on a novel anode support structure provided in this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Anode connector; 2. First anode support; 3. Second anode support; 4. Straight groove; 5. Curved groove; 51. Straight groove; 52. Curved groove; 6. Cathode connector; 61. Gas flow channel; 7. Dual cathode cell. Detailed Implementation

[0034] This application provides a dual-cathode battery and its stack based on a novel anode support structure, which solves the technical problem that traditional dual-cathode solid oxide fuel cells in the prior art have difficulty in extracting the anode.

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0040] Example 1

[0041] like Figures 1 to 4 The embodiments of this application provide a dual-cathode battery 7 and its stack based on a novel anode support structure. The dual-cathode battery 7 includes: a metal anode connector 1, a first battery unit, and a second battery unit. The first battery unit includes a first anode support 2, an anode layer, an electrolyte layer, a cathode layer, and a cathode connector 6 stacked sequentially from bottom to top. The second battery unit includes a second anode support 3, an anode layer, an electrolyte layer, a cathode layer, and a cathode connector 6 stacked sequentially from top to bottom.

[0042] The first anode support 2 and the second anode support 3 are both made of ceramic clay material that is pressed into flow channel grooves through a mold and then sintered.

[0043] like Figure 1The first anode support 2 and the second anode support 3 shown are respectively disposed on the upper and lower end faces of the anode connector 1. The lower end face of the first anode support 2 is provided with six flow channel grooves, and the upper end face of the second anode support 3 is symmetrically provided with six flow channel grooves. Each of the two cathode connectors 6 is provided with five air channels. The five air channels are arranged in opposite directions along the length of the cathode connector 6 and pass through the cathode connector 6 laterally.

[0044] like Figure 2 As shown, the two middle grooves are straight grooves 4, and two curved grooves 5 are set on each side. Each curved groove 5 is formed by connecting two upper and lower straight grooves 51 with a middle curved groove 52. The concave surface of the curved groove 52 of the two left curved grooves 5 faces to the right, and the concave surface of the curved groove 52 of the two right curved grooves 5 faces to the left. Moreover, the two left curved grooves 52 and the two right curved grooves 52 are symmetrically arranged with respect to the longitudinal center line of the support.

[0045] like Figure 4 As shown, three dual-cathode batteries 7 are stacked sequentially from bottom to top to form a dual-cathode battery stack 7, and two adjacent dual-cathode batteries 7 are connected by a cathode connector 6.

[0046] In this embodiment, by symmetrically arranging the first and second battery units on the anode connector 1, and covering the upper and lower end faces of the anode connector 1 with the first anode support 2 and the second anode support 3 respectively, the problem of the traditional dual-cathode battery 7 being unable to directly draw the anode from the ceramic anode support is solved while maintaining the dual-cathode symmetrical structure. Furthermore, the structure with the flow channel groove on the end face of the support avoids the excessive overall anode thickness and performance degradation caused by the "anode-connector-anode" structure, achieving effective extraction of anode current and maintaining the compactness of the battery. At the same time, it allows the input fuel gas to flow in an orderly laminar state, improving the combustion efficiency of the fuel gas. In addition, the free design of the fuel channel effectively eliminates the temperature unevenness in the battery reaction zone, achieving the technical effect of improving local overheating failure.

[0047] Example 2

[0048] Furthermore, slightly different from Embodiment 1 above, as follows: Figure 3 As shown, the flow channels on the anode support are all curved grooves 5, and the six curved grooves 5 are divided into two groups. With the longitudinal center line of the support as the reference, three curved grooves 5 are symmetrically arranged on both sides. Each curved groove 5 is composed of two straight grooves 51 connected to a curved groove 52 in the middle. The concave surface of the curved groove 52 of the three curved grooves on the left side faces to the right, and the concave surface of the curved groove 52 of the three curved grooves on the right side faces to the left.

[0049] In this embodiment, by setting all the flow channels on the first anode support 2 as curved channels 5, a full curved flow field is formed, which can significantly extend the flow path and residence time of fuel gas inside the anode support, promote the uniform penetration and diffusion of gas in the porous anode layer, and at the same time, the curved flow helps to enhance gas disturbance, thereby improving fuel utilization and further improving battery performance.

[0050] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0051] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0052] This specification and accompanying drawings are merely illustrative examples of this application and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Therefore, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A dual-cathode battery based on a novel anode support structure, characterized in that: The device includes a first battery unit, a second battery unit, and an anode connector (1); the first battery unit and the second battery unit are symmetrically arranged relative to the anode connector (1); the first battery unit includes a first anode support (2), the second battery unit includes a second anode support (3), the first anode support (2) and the second anode support (3) respectively cover the upper and lower end faces of the anode connector (1); the first anode support (2) has multiple flow channel grooves on its end face near the anode connector (1), the second anode support (3) has multiple flow channel grooves on its end face near the anode connector (1), and the multiple flow channel grooves on the first anode support (2) and the multiple flow channel grooves on the second anode support (3) are symmetrically arranged relative to the anode connector (1).

2. A dual-cathode battery based on a novel anode support structure according to claim 1, characterized in that, Multiple flow channel grooves are spaced apart along the width direction of the first anode support (2). The multiple flow channel grooves include a straight group and two curved groups. The straight group includes at least one straight groove (4), and the straight groove (4) in the straight group is symmetrically arranged with respect to the longitudinal center line of the first anode support (2). The two curved groups each include at least one curved groove (5). The two curved groups are located on both sides of the straight group, and the two curved groups are symmetrically arranged with respect to the longitudinal center line of the first anode support (2).

3. A dual-cathode battery based on a novel anode support structure according to claim 1, characterized in that, Each of the flow channels is a curved groove (5), and multiple curved grooves (5) are spaced apart along the width direction of the first anode support (2).

4. A dual-cathode battery based on a novel anode support structure according to claim 2 or 3, characterized in that, The anode connector (1) covers the flow path of all flow channel slots.

5. A dual-cathode battery based on a novel anode support structure according to claim 4, characterized in that, Each of the curved grooves (5) includes two straight grooves (51) and one curved groove (52). The two straight grooves (51) are connected to the two ends of the curved groove (52) respectively, and the two straight grooves (51) are coaxially arranged.

6. A dual-cathode battery based on a novel anode support structure according to claim 5, characterized in that, The concave surface of the groove (52) of each of the curved grooves (5) is set toward the longitudinal centerline of the first anode support (2).

7. A dual-cathode battery based on a novel anode support structure according to claim 6, characterized in that, Each of the straight grooves (51) extends along the length of the first anode support (2). With the extension direction of the straight grooves (51) as the longitudinal direction, each of the curved grooves (52) is mirror-symmetrically arranged with the transverse center line of the first anode support (2) as the axis of symmetry.

8. A dual-cathode battery stack based on a novel anode support structure, characterized in that, It includes multiple dual-cathode batteries (7) as described in claim 7, wherein the multiple dual-cathode batteries (7) are stacked sequentially from bottom to top.

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