Terminal unit and current collection structure of solid oxide fuel cell

Abstract

The present invention provides a terminal unit and current collection structure for a solid oxide fuel cell, belonging to the field of solid oxide fuel cells. The solid oxide fuel cell stack comprises a single cell and a connector. The single cell is strip-shaped. The connector comprises a mounting base body, a positive terminal, and a negative terminal. The mounting base body is provided with a mounting slot. The positive and negative terminals are disposed in the mounting slots, with one end extending to one side of the mounting slot. One end of the single cell is inserted into the other side of the mounting slot. The positive electrode of the single cell is connected to the positive terminal, and the negative electrode of the single cell is connected to the negative terminal. The use of this terminal unit and the current collection structure can solve the problems of difficult assembly of battery cells within solid oxide fuel cells and low product yield in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of solid oxide fuel cells, and in particular to a terminal unit and a current collecting structure of a solid oxide fuel cell. Background Art

[0002] Solid oxide fuel cell (SOFC) belongs to the third generation of fuel cells. It is an all-solid-state chemical power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. It has the highest theoretical energy density among several types of fuel cells and is generally believed to be a type of fuel cell that will be widely used in the future.

[0003] Solid oxide fuel cell stacks are typically constructed from a plurality of individual battery cells. In related art, see Patent Publication No. US20050147857A1. In existing solid oxide fuel cell stacks, the cylindrical battery cells are connected to the surface, with positive and negative electrodes then wrapped with positive and negative cables, such as silver or nickel wire, to collect electricity. Once these cells are integrated into a stack, they are then connected in series and parallel to form various battery structures.

[0004] The battery cell form used in the relevant technology has a large number of battery cells, and during the process of producing and assembling the battery stack, special equipment and operating methods are required to distinguish the positive and negative poles on the battery cells and connect them with cables. Otherwise, there will be problems such as redundancy and difficulty in distinguishing the positive and negative poles due to the excessive number of collecting cables, making assembly difficult. In addition, when individual battery cells fail in the after-sales stage, the difficulty of disassembly, replacement and repair also increases accordingly, resulting in a high rework and scrap rate for the overall product. Summary of the Invention

[0005] The present invention provides a terminal unit, current collection structure, and wiring method for a solid oxide fuel cell, which can solve the problems of difficult assembly of internal battery cells and low product yield in the prior art solid oxide fuel cells. The technical solution is as follows:

[0006] In a first aspect, a terminal unit of a solid oxide fuel cell comprises a single cell and a connection seat.

[0007] The single cell is in a strip shape;

[0008] The connecting seat includes a mounting seat body, a positive terminal and a negative terminal. The mounting seat body is provided with a mounting slot hole. The positive terminal and the negative terminal are arranged in the mounting slot hole and one end extends to one side of the mounting slot hole. One end of the single battery is inserted into the other side of the mounting slot hole. The positive electrode of the single battery is connected to the positive terminal, and the negative electrode of the single battery is connected to the negative terminal.

[0009] Optionally, the positive terminal and the negative terminal are arranged symmetrically relative to the single battery, the other end of the positive terminal is provided with a first bending portion bent toward the negative terminal, and the other end of the negative terminal is provided with a second bending portion bent toward the positive terminal, and the first bending portion is abutted against the second bending portion.

[0010] Optionally, the first bending portion and the second bending portion both have a plurality of wavy bending segments.

[0011] Optionally, the mounting seat body includes a top seat body, a middle seat body and a bottom seat body that are detachably connected, the mounting slot hole passes through the top seat body, the middle seat body and the bottom seat body, one end of the positive terminal and the negative terminal are located in the bottom seat body, and the first bending portion and the second bending portion are located in the top seat body.

[0012] Optionally, a core is provided in the middle seat, and one end of the single battery abuts against the core.

[0013] Optionally, one end of the positive terminal and one end of the negative terminal are bent toward each other and flush with an end surface of the bottom base away from the middle base.

[0014] Optionally, a mounting boss is provided on at least one of the middle seat body and the bottom seat body, and a mounting groove matching the mounting boss is provided on at least the other of the middle seat body and the bottom seat body, and the middle seat body and the bottom seat body are fixed by plugging the mounting boss and the mounting groove.

[0015] In the second aspect, an embodiment of the present invention provides a current collection structure, comprising a plurality of terminal units of the solid oxide fuel cell as described in the first aspect above, and also comprising a front end plate, wherein the single cells in the plurality of terminal units of the solid oxide fuel cell are parallel to each other and arranged in an array, and the single cells are passed through the front end plate and fixedly connected to the front end plate through the mounting seat body located on the other side of the front end plate.

[0016] Optionally, the single cells in the terminal units of multiple solid oxide fuel cells constitute multiple battery groups, the cells in the battery groups are connected in series through the positive terminal and one end of the negative terminal, and the multiple battery groups are connected in parallel through the positive terminal and one end of the negative terminal.

[0017] Optionally, a mixing chamber is further included, wherein the mixing chamber includes a box body bottom plate and a box body, the box body bottom plate is arranged in parallel and spaced apart on the side of the front end plate away from the mounting seat body, an air inlet is provided on the box body bottom plate, the box body is arranged around the box body bottom plate and the front end plate, the single battery is passed through the box body bottom plate, and the single battery located between the box body bottom plate and the front end plate is provided with an air vent connected to the internal air flow channel.

[0018] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:

[0019] The terminal unit of the solid oxide fuel cell provided by the embodiment of the present invention is used. For solid oxide fuel cells with power collection requirements, a dedicated connector structure is provided for the wiring harness connection of the corresponding single cell. The positive terminal and the negative terminal are embedded in the mounting slot, so that the strip-shaped single cell is inserted and fixed from one end of the connector, and the positive and negative electrodes are respectively in contact with the positive terminal and the negative terminal. The ends of the positive terminal and the negative terminal are respectively led out to the other end of the connector through the mounting slot for connection with the corresponding wiring harness. While ensuring the connection of the lead wires of the collection circuit, the line connection end is isolated from the single cell, eliminating the need for winding and fixing the wiring harness and the single cell. At the same time, it is convenient to distinguish and connect the wiring harness connection position. When a single cell fails, it can also be easily disassembled, maintained and replaced with the corresponding connector without having to consider the redundancy and winding of the connection harness. This effectively solves the problems of difficult battery unit assembly and low product yield in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 1 is a schematic exploded view of the structure of a terminal unit of a solid oxide fuel cell provided by an embodiment of the present invention;

[0022] Figure 2 1 is a schematic front view of the structure of a single cell provided in an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle;

[0024] Figure 4 1 is a schematic diagram of the left side structure of a single battery provided by an embodiment of the present invention;

[0025] Figure 5 is a structural cross-sectional view of a connecting socket provided by an embodiment of the present invention;

[0026] Figure 6 yes Figure 5 Schematic diagram of the cross section at AA in the middle;

[0027] Figure 7 is a schematic diagram of the three-dimensional structure of the current collection structure provided by an embodiment of the present invention;

[0028] Figure 8 This is a structural diagram of a front end plate side of a current collecting structure provided by an embodiment of the present invention;

[0029] Figure 9 yes Figure 8 Schematic diagram of the cross section at AA in the middle;

[0030] Figure 10 yes Figure 8 Schematic diagram of the cross section at the middle BB;

[0031] Figure 11 This is a circuit lead connection diagram on a current collecting structure provided by an embodiment of the present invention.

[0032] In the figure: 1-single battery; 2-connecting seat; 3-front end plate; 4-mixing chamber; 11-vent; 12-air flow channel; 21-mounting seat body; 21a-mounting hole groove; 22-positive terminal; 23-negative terminal; 41-box body bottom plate; 42-box body; 211-top seat body; 212-middle seat body; 213-bottom seat body; 214-mounting boss; 215-mounting groove; 221-first bending portion; 231-second bending portion; 411-air inlet; 2121-core; 2131-T-slot hole; o-bulge structure. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] Figure 1 1 is a schematic exploded view of the structure of a terminal unit of a solid oxide fuel cell provided by an embodiment of the present invention; Figure 2 1 is a schematic front view of the structure of a single cell provided in an embodiment of the present invention; Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle; Figure 4 1 is a schematic diagram of the left side structure of a single battery provided by an embodiment of the present invention; Figure 5 is a structural cross-sectional view of a connecting socket provided by an embodiment of the present invention; Figure 6 yes Figure 5 Schematic diagram of the cross section at AA in the middle; Figure 7 is a schematic diagram of the three-dimensional structure of the current collection structure provided by an embodiment of the present invention; Figure 8 This is a structural diagram of a front end plate side of a current collecting structure provided by an embodiment of the present invention; Figure 9 yes Figure 8 Schematic diagram of the cross section at AA in the middle; Figure 10 yes Figure 8 Schematic diagram of the cross section at the middle BB; Figure 11 This is a circuit lead connection diagram on the current collecting structure provided by an embodiment of the present invention. Figures 1 to 11 As shown, the embodiment of the present invention first provides a terminal unit of a solid oxide fuel cell, referring to Figures 1 to 6 , including a single battery 1 and a connecting seat 2.

[0035] The single cell 1 is in a strip shape. For example, in the embodiment of the present invention, the description is mainly based on the sheet-shaped single cell 1 in a flat and long strip shape. In other possible implementation methods, the single cell 1 can also adopt a circular tube or flat tube shape similar to those in the related art, and the embodiment of the present invention does not limit this.

[0036] The connector 2 includes a mounting body 21, a positive terminal 22, and a negative terminal 23. The mounting body 21 is provided with a mounting slot 21a. The positive terminal 22 and the negative terminal 23 are disposed in the mounting slot 21a, with one end extending to one side of the mounting slot 21a. One end of the cell 1 is inserted into the other side of the mounting slot 21a. The positive electrode of the cell 1 is connected to the positive terminal 22, and the negative electrode of the cell 1 is connected to the negative terminal 23.

[0037] In an embodiment of the present invention, the connector 2 is used to positionally secure the single cell 1 and to connect to the supporting structure in the solid oxide fuel cell stack. The mounting base 21 comprises a three-section modular structure comprising a top base 211, a middle base 212, and a bottom base 213. The top base 211, the middle base 212, and the bottom base 213 are all ceramic structural members having internal grooves or through-hole structures. When connected to each other, the grooves or holes within the top base 211, the middle base 212, and the bottom base 213 are partially interconnected to form a mounting slot 21a that runs through the entire mounting base 21. During assembly, the positive terminal 22 and the negative terminal 23 are first installed into the T-shaped slot 2131 of the bottom base 213. The ends of the positive terminal 22 and the negative terminal 23 extend to the large end of the T-shaped slot 2131, that is, the open end of the bottom base 213 away from the middle base 212. The remaining sections are embedded in the small end of the T-shaped slot 2131, that is, the slit structure with a thickness slightly larger than the thickness of the positive terminal 22 and the negative terminal 23, and are limited by its inner wall. Accordingly, the positive terminal 22 and the negative terminal 23 can be provided with a plurality of bulge structures on their extended sections to abut against the inner wall of the small end of the T-shaped slot 2131 to improve the stability of the limit fixation. Furthermore, the middle base 212 and the top base 211 are sequentially docked with the bottom base 213 to form a complete assembly. The other ends of the positive terminal 22 and the negative terminal 23 are positioned freely within the mounting slot 21a of the top base 211. A single cell 1 is then inserted through the open end of the mounting slot 21a on one side of the top base 211. The positive terminal 22 and the negative terminal 23 are then connected to the corresponding positive and negative electrodes on the outer surfaces of the cell 1, forming a terminal unit for the solid oxide fuel cell.

[0038] The terminal-type unit for a solid oxide fuel cell provided by an embodiment of the present invention is designed for solid oxide fuel cells with power collection requirements. A dedicated connector 2 structure is provided for the wiring harness connection of a single cell 1. A positive terminal 22 and a negative terminal 23 are embedded in the mounting slot 21a of the connector. The strip-shaped single cell 1 is inserted and secured at one end of the connector 2, with the positive and negative electrodes contacting the positive and negative terminals 22 and 23, respectively. The ends of the positive and negative terminals 22 and 23 are respectively led out through the mounting slot 21a to the other end of the connector 2 for connection to the corresponding wiring harness. While ensuring the connection of the lead wires for the current collection circuit, the line connection end is isolated from the single cell 1, eliminating the need for winding and fixing the wiring harness to the single cell 1. This also facilitates the identification and connection of the wiring harness connection position. In the event of a single cell 1 failure, it can be easily disassembled, maintained, and replaced with the corresponding connector 2, eliminating the need to worry about the complexity and entanglement of the connecting wiring harness. This effectively addresses the difficulties of difficult battery unit assembly and low product yield in the prior art.

[0039] Optionally, the positive terminal 22 and the negative terminal 23 are symmetrically arranged relative to the cell 1. The other end of the positive terminal 22 is provided with a first bent portion 221 that bends toward the negative terminal 23, and the other end of the negative terminal 23 is provided with a second bent portion 231 that bends toward the positive terminal 22. The first bent portion 221 abuts against the second bent portion 231. For example, in an embodiment of the present invention, by providing the first bent portion 221 and the second bent portion 231 that bend in opposite directions on the positive terminal 22 and the negative terminal 23, respectively, when the end of the cell 1 is not inserted into the mounting slot 21a of the top base 211, the first bent portion 221 and the second bent portion 231 disposed oppositely therein are in a mutually abutting state. When the end of the cell 1 is inserted, the insertion angle of the cell 1 is adjusted so that the positive and negative terminals on both sides are inserted from the side where the first bent portion 221 and the second bent portion 231 are located, respectively. After being squeezed by the cell 1, the first bent portion 221 separates from the second bent portion 231 and, under its own single action, clamps onto the positive and negative terminals of the cell 1, establishing electrical connection with the cell 1. This structural arrangement eliminates the need for additional welding or other fixed connection operations between the positive and negative terminals 22 and 23 and the cell 1, resulting in a simple structure and easy installation. It also facilitates disassembly, separation, and replacement and repair in the event of a subsequent failure.

[0040] Optionally, each of the first bend 221 and the second bend 231 has multiple wavy bends. For example, in an embodiment of the present invention, by configuring the first bend 221 and the second bend 231 into a wavy structure along their respective extension directions, after the cell 1 is inserted, the wavy bulged contact surfaces of the first bend 221 and the second bend 231 make multi-point contact with the positive and negative terminals of the cell 1. The undulating bend structure more easily generates a certain amount of compressive force against the contact surfaces of the cell 1 under the pressure of the cell 1, effectively avoiding poor contact and improving the stability of the circuit lead connection.

[0041] Optionally, a core 2121 is provided within the middle base 212, with one end of the cell 1 abutting against the core 2121. For example, in an embodiment of the present invention, the mounting slot 21a extending through the middle base 212 matches the inner diameter of the opening in the top base 211. The core 2121 is provided in the center of the mounting slot 21a of the middle base 212, with the spaces on either side of the core 2121 forming spaces for the positive terminal 22 and the negative terminal 23 to pass through, respectively. By providing a core 2121 that matches the length of the middle base 212, after the end of the cell 1 is inserted into the top base 211, it contacts the end surface of the core 2121 and is axially positioned within the mounting slot 21a, effectively plugging into place. This, coupled with the clamping of the positive and negative terminals 22 and 23 on either side, fully limits the position of the cell 1, preventing axial shaking during operation and further improving assembly stability.

[0042] Optionally, one end of the positive terminal 22 and the negative terminal 23 are bent toward each other and are flush with the end surface of the bottom base body 213 away from the middle base body 212. For example, in an embodiment of the present invention, in the top base body 211, the end surface of the large end of the T-shaped slot 2131 is recessed into the end surface of the bottom base body 213 away from the middle base body 212 by a certain distance, which is equal to the thickness of the positive terminal 22 and the negative terminal 23. The ends of the positive terminal 22 and the negative terminal 23 extending from the large end of the T-shaped slot 2131 are bent toward each other and one side is attached to the large end surface of the T-shaped slot 2131. At this time, the other side surfaces of the positive terminal 22 and the negative terminal 23 are flush with the end surface of the bottom base body 213 away from the middle base body 212. It is convenient for the staff to weld the circuit harness to the ends of the positive terminal 22 and the negative terminal 23 respectively according to the series and parallel connection requirements of the circuit after the battery stack is formed. The welding parts correspond one to one and there is no structural interference, which further improves the assembly convenience and error prevention and facilitates the harness connection.

[0043] Optionally, at least one of the middle base body 212 and the bottom base body 213 is provided with a mounting boss 214, and at least the other of the middle base body 212 and the bottom base body 213 is provided with a mounting groove 215 that matches the mounting boss 214. The middle base body 212 and the bottom base body 213 are fixed by plugging the mounting bosses 214 and the mounting grooves 215. For example, in an embodiment of the present invention, a plurality of mounting bosses 214 are provided on the bottom base body 213, and a plurality of mounting grooves 215 are correspondingly provided on the middle base body 212. When assembling the mounting base body 21, the mounting bosses 214 and the mounting grooves 215 are plugged in correspondingly. This has a simple structure and is easy to install. It also plays a foolproof role in installation, ensures the connectivity accuracy of the mounting slot 21a, and facilitates the positioning and installation of the positive terminal 22 and the negative terminal 23.

[0044] refer to Figures 7 to 11The embodiment of the present invention further provides a current collecting structure, including a plurality of Figures 1 to 6 The terminal unit of the solid oxide fuel cell shown is characterized in that it also includes a front end plate 3, and the single cells 1 in the terminal units of the multiple solid oxide fuel cells are parallel to each other and arranged in an array. The single cells 1 are inserted into the front end plate 3 and fixedly connected to the front end plate 3 through the mounting seat body 21 located on the other side of the front end plate 3. For example, in an embodiment of the present invention, after the terminal unit formed by the combination of the single cells 1 and the connector 2 is prepared, it is assembled correspondingly with the front end plate used for support in the fuel cell stack. The single cells 1 in each terminal unit are inserted into the front end plate 3. The single cells 1 are located on one side of the front end plate 3 as a whole and are used to perform redox reactions in the combustion chamber. The connector 2 and the lead-out ends of the internal positive terminal 22 and the negative terminal 23 are concentrated on the other side of the front end plate 3 to facilitate wiring harness connection and form an integrated current collection structure to meet the current collection requirements of the fuel cell stack. The terminal unit provided in the embodiment of the present invention is used to form a current collecting structure, which uses a combined assembly structure of positive and negative terminals and a ceramic seat to assemble the single cell 1 and combine it with the front end plate 3 used for support in the stack. When individual single cells 1 or the entire terminal unit are found to have faults in production or after-sales after assembly, they can be pulled out and replaced as a whole. The assembly method of the same-side wiring is flexible and simple, and maintenance and replacement will not destroy the integrity of the entire stack, which can effectively reduce the rework rate and scrap rate of solid oxide fuel cell stack products.

[0045] Optionally, the single cells 1 in the terminal units of multiple solid oxide fuel cells form multiple battery packs, and the cells in the battery packs are connected in series through one end of the positive terminal 22 and the negative terminal 23, and the multiple battery packs are connected in parallel through one end of the positive terminal 22 and the negative terminal 23. For example, the wiring harness of the external circuit lead can be welded to the ends of the positive terminal 22 and the negative terminal 23 led out of different connectors 2 according to the needs of circuit series and parallel connection, so as to form a circuit structure that meets actual use requirements. Figure 11 , that is, every six single batteries 1 are first connected in series and then in parallel, wherein the end labeled m is the positive lead and the end labeled n is the negative lead.

[0046] For example, in an embodiment of the present invention, when connecting the wiring harnesses of a large number of terminal-type units, each connector 2 is provided with corresponding positive and negative terminals 22 and 23 for circuit connection. This effectively reduces the difficulty of distinguishing the positive and negative circuit leads of each cell 1 for battery stacks that require multiple cells 1 to be connected in series and then in parallel. This eliminates the need for dedicated equipment and operating methods for adaptive connection, effectively reducing processing difficulty and cost.

[0047] Optionally, a mixing chamber 4 is further included, comprising a box body bottom plate 41 and a box body 42. The box body bottom plate 41 is arranged parallel and spaced apart on a side of the front end plate 3 away from the mounting base 21. An air inlet 411 is provided on the box body bottom plate 41. The box body 42 is arranged around and between the box body bottom plate 41 and the front end plate 3. The single cells 1 are arranged on the box body bottom plate 41. The single cells 1 located between the box body bottom plate 41 and the front end plate 3 are provided with air vents 11 that communicate with the internal airflow channel. For example, in an embodiment of the present invention, the box body bottom plate 41 of the mixing chamber 4 can serve as an additional support structure to support the plurality of single cells 1 arrayed on one side of the front end plate 3, thereby improving the overall stability of the current collection structure. At the same time, one end of each cell 1 inserted into the connector 2 is a closed structure, and an airflow channel 12 is provided inside the cell 1, connecting to the other end. A vent 11 is provided on the section of the cell 1 located near the connector 2 and within the housing 42. The mixed gas used for the redox reaction is first introduced from the outside into the mixing chamber 4 through the air inlet 411, then enters the airflow channel 12 inside the cell 1 through the vent 11 on each cell 1, and finally is discharged from the end of the cell 1 located in the combustion chamber. This arrangement satisfies the mixed gas supply and flow requirements of the solid oxide fuel cell stack during operation. While improving the overall structural stability, it eliminates the need for a separate mixed gas chamber for each cell 1, making the entire system more compact.

[0048] Optionally, the mounting base 21 and the front end plate 3, and the box body 42 and the front end plate 3 are bonded together using glass glue. It should be noted that the high-temperature resistant glass glue used in the embodiment of the present invention needs to be selected to meet different expansion coefficients and concentrations according to the working environment and expansion coefficients of the sealing material, such as ceramic or metal. The embodiment of the present invention does not impose any restrictions on this, as long as it can achieve stable bonding and high-temperature resistance at the bonding parts.

[0049] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the art to which the invention belongs. The terms "first", "second" and similar words used in the patent specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation, but rather indicate the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects appearing before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left", and "right" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A terminal unit of a solid oxide fuel cell, characterized in that: include: Single battery (1) and connector (2), The single cell (1) is in a strip shape; The connecting seat (2) comprises a mounting seat body (21), a positive terminal (22) and a negative terminal (23); a mounting slot (21a) is provided on the mounting seat body (21); the positive terminal (22) and the negative terminal (23) are arranged in the mounting slot (21a) and one end of each of the positive terminal (22) and the negative terminal (23) extends to one side of the mounting slot (21a); one end of the single battery (1) is inserted into the other side of the mounting slot (21a); the positive electrode of the single battery (1) is connected to the positive terminal (22), and the negative electrode of the single battery (1) is connected to the negative terminal (23); The positive terminal (22) and the negative terminal (23) are symmetrically arranged relative to the single battery (1); the other end of the positive terminal (22) is provided with a first bent portion (221) bent toward the negative terminal (23); the other end of the negative terminal (23) is provided with a second bent portion (231) bent toward the positive terminal (22); the first bent portion (221) and the second bent portion (231) are in contact with each other; The mounting seat body (21) comprises a detachably connected top seat body (211), a middle seat body (212) and a bottom seat body (213); after being connected to each other, the mounting slot (21a) passes through the top seat body (211), the middle seat body (212) and the bottom seat body (213); one end of the positive terminal (22) and the negative terminal (23) are located in the bottom seat body (213); and the first bending portion (221) and the second bending portion (231) are located in the top seat body (211).

2. The terminal unit of the solid oxide fuel cell according to claim 1, characterized in that: The first bending portion (221) and the second bending portion (231) both have a plurality of wavy bending sections.

3. The terminal unit of the solid oxide fuel cell according to claim 1, characterized in that: A core portion (2121) is provided in the middle seat body (212), and one end of the single battery (1) abuts against the core portion (2121).

4. The terminal unit of the solid oxide fuel cell according to claim 1, characterized in that: One end of the positive terminal (22) and the negative terminal (23) are bent toward each other and are flush with an end surface of the bottom seat (213) away from the middle seat (212).

5. The terminal unit of the solid oxide fuel cell according to claim 1, characterized in that: At least one of the middle seat (212) and the bottom seat (213) is provided with a mounting boss (214), and at least the other of the middle seat (212) and the bottom seat (213) is provided with a mounting groove (215) matching the mounting boss (214), and the middle seat (212) and the bottom seat (213) are plugged and fixed by the mounting boss (214) and the mounting groove (215).

6. A current collection structure comprising a plurality of terminal units of a solid oxide fuel cell according to any one of claims 1 to 5, characterized in that: It also includes a front end plate (3), wherein the single cells (1) in the terminal units of the plurality of solid oxide fuel cells are arranged in parallel and in an array, and the single cells (1) are passed through the front end plate (3) and fixedly connected to the front end plate (3) via the mounting seat (21) located on the other side of the front end plate (3).

7. The current collection structure according to claim 6, characterized in that: The single cells (1) in the terminal units of the plurality of solid oxide fuel cells constitute a plurality of battery packs, the cells in the battery packs are connected in series via the positive terminal (22) and one end of the negative terminal (23), and the plurality of battery packs are connected in parallel via the positive terminal (22) and one end of the negative terminal (23).

8. The current collection structure according to claim 6, characterized in that: The invention also includes a mixing chamber (4), wherein the mixing chamber (4) includes a box body bottom plate (41) and a box body (42), wherein the box body bottom plate (41) is arranged in parallel and spaced apart on a side of the front end plate (3) away from the mounting seat body (21), and an air inlet hole (411) is provided on the box body bottom plate (41), and the box body (42) is arranged around and between the box body bottom plate (41) and the front end plate (3), and the single battery (1) is passed through the box body bottom plate (41), and the single battery (1) located between the box body bottom plate (41) and the front end plate (3) is provided with an air vent (11) connected to an internal air flow channel.

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