Solid oxide fuel cell stack

Abstract

The utility model discloses a solid oxide fuel cell stack, and belongs to the technical field of fuel cells. Comprising a cylindrical battery and a plurality of battery holders, the battery holders comprise four groups of arc-shaped seats, the four groups of arc-shaped seats are annularly distributed, mounting ports matched with the cylindrical battery are formed in the inner sides of the four groups of arc-shaped seats, battery connecting piece connecting ports are reserved in the centers of the battery holders, and connecting plates are fixed among the four groups of arc-shaped seats. The adjacent battery holders are detachable, a pressing plate is detachably installed between every two adjacent battery holders, the pressing plates are arranged on the sides of the connecting plates, and battery connecting piece placing grooves are reserved between the pressing plates and the connecting plates, so that the anti-channeling strength of the battery holders is improved, and the situation that the battery connecting pieces are subjected to upward jacking force when the cylindrical battery axially shifts is avoided; and the safety of the battery system is ensured.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and more specifically, to a solid oxide fuel cell stack. Background Art

[0002] A solid oxide fuel cell stack is a battery system composed of multiple solid oxide fuel cell monomers assembled in a specific manner (such as series, parallel, or hybrid). After the solid oxide fuel cell stack and the battery holder are assembled into a battery system, if the cylindrical battery is assembled by axial plugging and unplugging, the vehicle will experience severe jolting when driving on an uneven road. If the cylindrical battery is assembled by axial plugging and unplugging, the vehicle will experience axial movement between the battery holders during the severe jolting process. The axial movement of the battery holder will directly cause the battery connector to be subjected to an upward force, thereby loosening the connection between it and the battery or adjacent components. This looseness will not only affect the smooth transmission of current, but may also increase contact resistance, leading to energy loss and decreased battery efficiency. Loose connectors may also cause poor electrical contact, resulting in the risk of local overheating or even short circuits, posing a threat to the safety of the battery system.

[0003] In view of this, we propose a solid oxide fuel cell stack. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] The purpose of this application is to provide a solid oxide fuel cell group, which solves the technical problems in the above-mentioned background technology, improves the anti-collision strength of the battery holder, avoids the upward force on the battery connecting piece caused by the axial movement of the cylindrical battery, and ensures the safety of the battery system.

[0006] 2. Technical solution

[0007] The technical solution of the present application provides a solid oxide fuel cell group, including a cylindrical battery and a plurality of battery seats, wherein the battery seats include four groups of arc-shaped seats, the four groups of arc-shaped seats are distributed in a ring, the inner sides of the four arc-shaped seats are formed with mounting openings adapted to the cylindrical battery, a battery connecting piece connection opening is reserved in the center of the battery seat, a connecting plate is fixed between the four groups of arc-shaped seats, adjacent battery seats are detachable, a pressure plate is detachably installed between two adjacent battery seats, the pressure plate is placed on the side of the connecting plate, and a battery connecting piece placement groove is reserved between the pressure plate and the connecting plate.

[0008] As an optional solution to the technical solution of this application document, a connecting block with a trapezoidal cross-section is integrally formed on one side edge of the arc-shaped seat, and a connecting port adapted to the connecting block is opened on the other side edge.

[0009] As an optional solution to the technical solution of this application document, a card slot is provided on the side of the arc seat close to the connecting plate, and card blocks adapted to the card slot are fixed on both sides of the pressure plate. Multiple positioning blocks are also fixed on both sides of the pressure plate, and a positioning slot adapted to the positioning block is provided on the side of the arc seat close to the connecting plate.

[0010] As an optional solution of the technical solution of this application document, the arc-shaped seat is a hollow structure, and the inner wall of the arc-shaped seat is integrally formed with ribs on one side of the connecting block and the connecting port.

[0011] As an optional solution of the technical solution of this application document, a plurality of heat dissipation holes are opened on the surface of the pressing plate, and a finger hole is also opened in the center of the pressing plate.

[0012] As an optional solution to the technical solution of this application document, the outer wall of the arc-shaped seat is tangent to the cylindrical battery, and an arc-shaped opening is opened on the outer side of the connecting plate.

[0013] 3. Beneficial effects

[0014] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0015] 1. After assembling the cylindrical batteries using the battery holders, the present invention uses a pressure plate to securely connect two adjacent battery holders. The pressure plate serves to improve the axial anti-splitting strength between the adjacent battery holders. Furthermore, after the battery connectors are connected to the cylindrical battery electrodes, the pressure plate presses the battery connectors onto the battery holders, thereby improving the connection reliability between the battery connectors and the cylindrical batteries and ensuring the safety of the battery system.

[0016] 2. In this application, the outer wall of the arc-shaped seat is tangent to the cylindrical battery, and the arc-shaped opening prevents the connecting plate from interfering with the cylindrical battery. Therefore, when multiple battery seats are assembled with each other, the cylindrical batteries are attached to each other, thereby reducing the distance between the cylindrical batteries and increasing the number of cylindrical batteries assembled under the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the overall assembly state of a solid oxide fuel cell stack disclosed in a preferred embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the back structure of a cell holder of a solid oxide fuel cell stack disclosed in a preferred embodiment of the present application;

[0019] Figure 3 A solid oxide fuel cell stack disclosed in a preferred embodiment of this application Figure 2 A in the middle is an enlarged structural diagram;

[0020] Figure 4 This is a schematic diagram of the front structure of a cell holder of a solid oxide fuel cell stack disclosed in a preferred embodiment of the present application;

[0021] Figure 5 A solid oxide fuel cell stack disclosed in a preferred embodiment of this application Figure 4 The enlarged structural diagram at B in the middle;

[0022] Figure 6 A solid oxide fuel cell stack disclosed in a preferred embodiment of this application Figure 4 The enlarged structural diagram at C in the middle;

[0023] Figure 7 This is a schematic diagram of a pressure plate structure of a solid oxide fuel cell stack disclosed in a preferred embodiment of the present application;

[0024] Explanation of the numbers in the figure: 1. Battery seat; 11. Arc seat; 111. Connecting port; 112. Card slot; 113. Positioning slot; 114. Rib; 12. Connecting plate; 121. Arc port; 13. Connecting block; 14. Battery connector port; 2. Press plate; 21. Battery connector placement slot; 22. Card block; 23. Positioning block; 24. Heat dissipation hole; 25. Finger hole; 3. Cylindrical battery. DETAILED DESCRIPTION

[0025] The present application is further described in detail below with reference to the accompanying drawings.

[0026] A solid oxide fuel cell stack includes a cylindrical battery 3 and multiple battery holders 1. The battery holders 1 include four groups of arcuate seats 11, which are distributed in a ring. The inner sides of the four arcuate seats 11 are formed with mounting openings that are compatible with the cylindrical battery 3. A battery connector connection opening 14 is reserved in the center of the battery holder 1. A connecting plate 12 is fixed between the four groups of arcuate seats 11. Adjacent battery holders 1 are detachable. A pressure plate 2 is detachably installed between two adjacent battery holders 1. The pressure plate 2 is placed on the side of the connecting plate 12. A battery connector placement groove 21 is reserved between the pressure plate 2 and the connecting plate 12.

[0027] Reference Figure 1-Figure 7 Both ends of the cylindrical battery 3 can be inserted into the mounting opening of the battery holder 1, and the positive and negative poles are respectively placed at the battery connecting piece connection openings 14 at both ends. The battery connecting piece is placed along the battery connecting piece placement groove 21 and is electrically connected to the cylindrical battery 3. Then, the two adjacent battery holders 1 are fixedly connected by the pressing plate 2. Under the action of the pressing plate 2, the axial anti-channeling strength between the adjacent battery holders 1 is improved. Secondly, after the battery connecting piece is connected to the electrode of the cylindrical battery 3, the battery connecting piece is pressed onto the battery holder 1 through the pressing plate 2 to improve the connection reliability between the battery connecting piece and the cylindrical battery 3.

[0028] A connecting block 13 with a trapezoidal cross section is integrally formed on one side edge of the arc-shaped seat 11 , and a connecting opening 111 adapted to fit with the connecting block 13 is formed on the other side edge.

[0029] Reference Figure 2-Figure 4 The cross-section of the connecting block 13 is a trapezoidal structure, and one side of the narrow side is integrally formed on the arc seat 11. The lower end opening of the side with the connecting port 111 corresponds to the connecting block 13. Press the battery holder 1 downward and make the connecting port 111 snap into the connecting block 13, so that the adjacent battery holders 1 can be fixed and installed.

[0030] A card slot 112 is provided on one side of the arc seat 11 close to the connecting plate 12, and card blocks 22 adapted to the card slot 112 are fixed on both sides of the pressure plate 2. Multiple positioning blocks 23 are also fixed on both sides of the pressure plate 2, and a positioning slot 113 adapted to the positioning block 23 is provided on one side of the arc seat 11 close to the connecting plate 12.

[0031] Reference Figure 5-Figure 7 The lower surface of the card block 22 is a slope structure. After the arc-shaped seats 11 of the two groups of battery holders 1 are fixed to each other through the connecting block 13, the positioning block 23 of the pressure plate 2 is then aligned with the positioning groove 113, and the pressure plate 2 is pressed downward. The pressure plate 2 has a local concave bend, and the card block 22 is inserted into the card groove 112. At this time, under the action of the pressure plate 2, the two adjacent groups of battery holders 1 can be fixedly connected, and when the adjacent battery holders 1 have an axial movement force, the axial movement between the battery holders 1 can be avoided under the action of the card block 22.

[0032] The arc-shaped seat 11 is a hollow structure, and the inner wall of the arc-shaped seat 11 is integrally formed with ribs 114 on one side of the connecting block 13 and the connecting opening 111 .

[0033] Reference Figure 2 and Figure 3 The hollow structure design of the arc-shaped seat 11 can reduce the weight of the battery holder 1 and facilitate the heat dissipation of the cylindrical battery 3. At the same time, symmetrical ribs 114 are integrally formed on the inner wall of one side of the connecting port 111 and the connecting block 13. The ribs 114 can improve the strength of the connecting port 111 and the connecting block 13, preventing the connecting port 111 from deforming and detaching after the connecting block 13 and the connecting port 111 are assembled.

[0034] A plurality of heat dissipation holes 24 are provided on the surface of the pressing plate 2 , and a finger hole 25 is also provided in the center of the pressing plate 2 .

[0035] Reference Figure 7When the pressing plate 2 is pressed on the battery connecting piece, the heat dissipation effect of the battery connecting piece in the pressing plate 2 area can be improved through the heat dissipation holes 24. At the same time, when removing the pressing plate 2, put your fingers into the finger holes 25, and when you pull it up, the pressing plate 2 will bulge upward and bend, so that the blocks 22 on both sides of the pressing plate 2 move relative to each other and disengage from the card slots 112, so that the pressing plate 2 can be quickly removed from between the two groups of battery holders 1.

[0036] The outer wall of the arc-shaped seat 11 is tangent to the cylindrical battery 3 , and an arc-shaped opening 121 is formed on the outer side of the connecting plate 12 .

[0037] Reference Figure 1 and Figure 2 The outer wall of the arc seat 11 is tangent to the cylindrical battery 3, and the arc-shaped opening 121 prevents the connecting plate 12 from interfering with the cylindrical battery 3. Therefore, when multiple battery seats 1 are assembled with each other, the cylindrical batteries 3 are attached to each other, thereby reducing the distance between the cylindrical batteries 3 and increasing the number of cylindrical batteries 3 assembled under the same volume.

[0038] Working principle: A battery holder 1 is installed at both ends of each cylindrical battery 3, and then the connecting blocks 13 of the adjacent arc-shaped seats 11 are matched with the connecting ports 111, and the battery holders 1 are assembled from top to bottom. After the battery holders 1 are assembled, the battery connecting pieces are placed in the battery connecting piece placement grooves 21 and connected with the cylindrical batteries 3. Then the pressing plate 2 is clamped in the battery connecting piece placement grooves 21 between the two battery holders 1, and the positioning blocks 23 correspond to the positioning grooves 113. Then the pressing plate 2 is pressed downward so that the clamping blocks 22 are clamped in the clamping grooves 112. At this time, the battery connecting pieces on the battery holders 1 can be limited by the pressing plate 2, and the axial movement of the adjacent battery holders 1 can be avoided under the action of the clamping blocks 22. At the same time, when the pressing plate 2 needs to be removed, the pressing plate 2 can be quickly removed from the two adjacent battery holders 1 by buckling the fingers into the finger holes 25 and pulling upward.

Claims

1. A solid oxide fuel cell stack comprising a cylindrical battery (3) and a plurality of battery holders (1), wherein the battery holders (1) are characterized in that: The battery seat (1) comprises four groups of arc seats (11), the four groups of arc seats (11) are distributed in a ring, the inner sides of the four arc seats (11) are formed with mounting openings adapted to the columnar batteries (3), the center of the battery seat (1) is reserved with a battery connecting piece connection opening (14), a connecting plate (12) is fixed between the four groups of arc seats (11), adjacent battery seats (1) are detachable, and a pressure plate (2) is detachably installed between two adjacent battery seats (1), the pressure plate (2) is placed on the side of the connecting plate (12), and a battery connecting piece placement groove (21) is reserved between the pressure plate (2) and the connecting plate (12).

2. The solid oxide fuel cell stack according to claim 1, wherein: A connecting block (13) having a trapezoidal cross-section is integrally formed on one side edge of the arc-shaped seat (11), and a connecting opening (111) adapted to the connecting block (13) is provided on the other side edge.

3. The solid oxide fuel cell stack according to claim 1, wherein: A card slot (112) is provided on one side of the arc seat (11) close to the connecting plate (12), card blocks (22) adapted to the card slot (112) are fixed on both sides of the pressure plate (2), and a plurality of positioning blocks (23) are also fixed on both sides of the pressure plate (2), and a positioning slot (113) adapted to the positioning block (23) is provided on one side of the arc seat (11) close to the connecting plate (12).

4. The solid oxide fuel cell stack according to claim 1, wherein: The arc-shaped seat (11) is a hollow structure, and the inner wall of the arc-shaped seat (11) is integrally formed with ribs (114) on one side of the connecting block (13) and the connecting port (111).

5. The solid oxide fuel cell stack according to claim 1, characterized in that: A plurality of heat dissipation holes (24) are provided on the surface of the pressing plate (2), and a finger hole (25) is also provided at the center of the pressing plate (2).

6. The solid oxide fuel cell stack according to claim 1, characterized in that: The outer wall of the arc-shaped seat (11) is tangent to the cylindrical battery (3), and an arc-shaped opening (121) is provided on the outer side of the connecting plate (12).

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