Solid oxide fuel cell stack

Abstract

The utility model relates to the technical field of fuel cells, in particular to a solid oxide fuel cell stack which comprises a shell, a top cover is arranged at the top of the shell, and a lock catch is arranged at the top of the top cover. In the flowing process of cooling water in the heat exchange pipes through hoses, heat absorbed by heat conduction plates can be transmitted into the cooling water in the heat exchange pipes, water-cooling heat dissipation is achieved, a motor is started, an output shaft of the motor drives fan blades to rotate, and the heat conduction pipe on one side is matched with the motor to drive the fan blades to rotate; according to the heat exchanger, hot air in the shell flows into the base, flows along the space formed by the heat exchange pipes on the two sides and makes contact with the heat exchange pipes, so that flowing cooling water in the heat exchange pipes absorbs heat and enters the shell through the heat conduction pipes on the other side, and heat dissipation of the interior of the shell is achieved; therefore, the heat dissipation efficiency of the solid oxide fuel cell stack is improved, and meanwhile, the influence of external dust on the internal cell unit body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a solid oxide fuel cell stack. Background Art

[0002] Solid oxide fuel cells are fuel cells that use solid oxides as electrolytes and operate at high temperatures. They typically use solid ceramic electrolytes such as zirconium oxide stabilized with yttria.

[0003] For example, a solid oxide fuel cell stack with the authorization announcement number CN215680742U, the above document arranges a number of battery units densely on a fixing frame, and the fixing frame is directly mounted on a metal heat-conducting plate; a chassis with a serpentine groove is arranged below the heat-conducting plate, which not only supports the battery units above, but also builds a heat dissipation structure based on the interlayer between the chassis and the heat-conducting plate; the heat dissipation structure is mainly composed of a serpentine tube, and the joint at the end of the serpentine tube extends to the outside of the box through the through hole on the side wall of the box and is connected to a water source, thereby building a continuously flowing cooling water environment in the serpentine tube; the serpentine tube It is embedded in the serpentine groove on the chassis and is in close contact with the heat conduction plate, thereby playing a water-cooling and heat dissipation role for the battery unit body above; at the same time, the utility model adds a solenoid valve on the serpentine tube to control the flow rate of cooling water, thereby controlling the cooling efficiency. However, during the use of the solid oxide fuel cell stack in the above document, since the heat conduction plate in the above document is arranged at the bottom of the battery unit body, the solid oxide fuel cell stack continuously generates heat during operation, and when the heat is transferred to the heat conduction plate, the heat transfer at the top of the shell is relatively slow, which makes the heat dissipation efficiency of the solid oxide fuel cell stack in the above document poor;

[0004] Also, during the use of the solid oxide fuel cell stack in the above-mentioned document, the heat conductive plate and the battery unit body are arranged at the bottom of the box, so that when the battery unit body fails or is damaged, due to the narrow distance between the box and the battery unit body and the deep cavity of the box, personnel need to operate inside the box when repairing the solid oxide fuel cell stack, which makes the operating space small and inconvenient for repairing the solid oxide fuel cell stack. Utility Model Content

[0005] The utility model aims to solve the problem of poor heat dissipation efficiency of solid oxide fuel cell stack and the problem of small operating space making it inconvenient to repair the solid oxide fuel cell stack, and proposes a solid oxide fuel cell stack.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A solid oxide fuel cell stack is designed, comprising a shell, a top cover is arranged on the top of the shell, a lock is arranged on the top of the top cover, a plurality of battery units are arranged in the inner cavity of the shell, the battery units are clamped on a fixing frame, the fixing frame is fixedly connected to the end of a heat conducting plate, a plurality of first connecting grooves are processed on the side walls of both sides of the shell, and a heat dissipation structure is arranged on the outer side of the first connecting groove;

[0008] The heat dissipation structure includes a heat conducting pipe, one side of the heat conducting pipe matches the first connecting groove, and the heat conducting pipe is fixed to the shell by welding, the other side of the heat conducting pipe matches the second connecting groove, the second connecting groove is arranged at the side end of the base, and the heat conducting pipe is fixed to the base by welding, the insides of the heat conducting pipes on both sides are respectively fixedly connected to the motor, the output shaft of the motor is fixedly connected to the fan blades, the inside of the base is fixedly connected to the heat exchange pipes on both sides, connecting valves are respectively arranged on both sides of the heat exchange pipe, and one end face of the heat exchange pipe is fixedly connected to the base.

[0009] Preferably, the other end surfaces of the heat exchange tubes on both sides are in contact with the heat conduction plates to ensure that the heat conduction plates are in contact with the heat exchange tubes.

[0010] Preferably, the base is fitted with the heat conducting plate, and a rubber sealing pad is provided between the contact surface of the base and the side walls around the heat conducting plate to ensure the sealing between the heat conducting plate and the base and the heat conducting plate and the base can be disassembled.

[0011] Preferably, the space formed between the heat exchange tubes on both sides is connected to the heat conduction tube, so as to ensure that the heat inside the shell flows into the space and contacts the heat exchange tube.

[0012] Preferably, the top end of the base is fixedly connected to the shell, and a connecting structure is arranged around the end surface of the heat conducting plate;

[0013] The connecting structure includes a connecting rod, and the ends of the multiple connecting rods are fixedly connected to the heat conducting plate. The inner side end of the connecting rod is processed with a slot, and the slot matches one side of the plug rod. The outer wall of the connecting rod matches the connecting seat. The interior of the connecting seat is slidably connected to the plug rod. The middle part of the plug rod is fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to the connecting seat. The other side of the plug rod is rotatably connected to the rotating block. The connecting seat is fixedly connected to one end of the fixed block, and the other end of the fixed block is fitted with the rotating block. The end of the rotating block is provided with a support portion.

[0014] Preferably, ends of the plurality of connection seats are fixedly connected to the shell.

[0015] Preferably, the axial length of the support portion is the same as the depth of the slot, and the axial cross-section of the support portion is the same as that of the fixing block.

[0016] The utility model provides a solid oxide fuel cell stack, which has the following beneficial effects: during the cooling water flowing through the heat exchange tube through the hose heat exchange tube, the heat absorbed by the heat conduction plate will be transferred to the cooling water inside the heat exchange tube, so as to achieve water cooling and heat dissipation, and the motor will be started, and the output shaft of the motor will drive the fan blades to rotate, and the heat conduction tube on one side will cooperate with the motor to drive the fan blades to rotate, so that the hot air inside the shell will flow to the inside of the base, and flow along the space formed by the heat exchange tubes on both sides, and contact with the heat exchange tube so that the cooling water flowing inside the heat exchange tube absorbs the heat, and enters the shell through the heat conduction tube on the other side, so as to achieve heat dissipation inside the shell, thereby improving the heat dissipation efficiency of the solid oxide fuel cell stack, and at the same time avoiding the influence of external dust on the internal battery unit body;

[0017] When a fault occurs in the battery unit inside the shell, the staff pulls the rotating block, and the rotating block drives the insertion rod to move toward the rotating block. When the insertion rod is separated from the slot, the rotating block is rotated 180 degrees. At this time, the support part and the fixed block are fitted together. The restrictions of the support part and the fixed block make it impossible for the elastic force of the spring to drive the insertion rod to reset. Similarly, the other rotating blocks are pulled in turn, and then the staff moves the heat conduction plate upward through the connecting rod, so that the heat conduction plate is disassembled and moved out of the shell, which increases the operating space for the staff during maintenance and makes the maintenance of the solid oxide fuel cell stack more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of a top view structure;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the plug rod, spring and connecting seat;

[0022] Figure 5 It is a side cross-sectional structural schematic diagram of the utility model;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the heat exchange tube in the utility model;

[0024] Figure 7 It is a structural schematic diagram of the insert rod, spring and rotating block in the utility model.

[0025] In the figure: 1. shell, 101. first connecting groove, 2. heat conducting plate, 3. heat dissipation structure, 301. heat conducting pipe, 302. motor, 303. fan blade, 304. base, 3041. second connecting groove, 305. heat exchange pipe, 306. connecting valve, 4. connecting structure, 401. connecting rod, 4011. slot, 402. connecting seat, 403. plug rod, 404, spring, 405. rotating block, 4051. supporting part, 406. fixing block, 5. top cover, 6. fixing frame, 7. lock, 8. battery unit body. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] See attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In the present embodiment, a solid oxide fuel cell stack includes a shell 1, a top cover 5 is provided on the top of the shell 1, a lock 7 is provided on the top of the top cover 5 for fixing the top cover 5 and the shell 1, a plurality of battery cells 8 are provided in the inner cavity of the shell 1, the battery cells 8 are clamped on the fixing frame 6, the fixing frame 6 is fixedly connected to the end of the heat conducting plate 2, a plurality of first connecting grooves 101 are processed on the side walls of the shell 1, a heat dissipation structure 3 is provided on the outer side of the first connecting groove 101, the heat dissipation structure 3 includes a heat conducting pipe 301, one side of the heat conducting pipe 301 matches the first connecting groove 101, and the heat conducting pipe 301 is fixed to the shell 1 by welding, the other side of the heat conducting pipe 301 matches the second connecting groove 3041, the second connecting groove 3041 is provided at the side end of the base 304, and the heat conducting pipe 301 is fixed to the base 304 by welding, the insides of the heat conducting pipes 301 on both sides are respectively fixedly connected to the motor 302, the output shaft of the motor 302 drives the fan blades 303 to rotate, and the heat conducting pipes on both sides are connected to the motor 302. The motor 302 inside the tube 301 has the same direction, ensuring that the air inside the shell 1 flows in the same direction. At the same time, a sealing gasket is arranged between the top cover 5 and the shell 1 to ensure that the shell 1 is in a sealed state. The heat pipe 301 on one side cooperates with the motor 302 to drive the fan blade 303 to rotate, so that the hot air inside the shell 1 flows to the inside of the base 304, and flows along the space formed by the heat exchange tubes 305 on both sides, and contacts with the heat exchange tubes 305 so that the cooling water flowing inside the heat exchange tubes 305 absorbs the heat, and enters the shell 1 through the heat conduction tube 301 on the other side, so as to realize the internal circulation of the shell 1, and less external dust affects the internal battery unit 8. The output shaft of the motor 302 is fixedly connected to the fan blade 303, and the inside of the base 304 is fixedly connected to the heat exchange tubes 305 on both sides. Connecting valves 306 are respectively arranged on both sides of the heat exchange tube 305, and the connecting valves 306 on both sides of the heat exchange tube 305 are connected to the water source through a hose, and one end face of the heat exchange tube 305 is fixedly connected to the base 304.

[0028] See attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The other side end faces of the heat exchange tubes 305 on both sides are fitted with the heat conduction plate 2 to ensure that the heat conduction plate 2 is in contact with the heat exchange tube 305. During the flow of cooling water inside the heat exchange tube 305, the heat absorbed by the heat conduction plate 2 will be transferred to the cooling water inside the heat exchange tube 305 to achieve water-cooled heat dissipation. The base 304 is fitted with the heat conduction plate 2. A rubber sealing gasket is provided between the contact surface of the base 304 and the side walls around the heat conduction plate 2 to ensure the sealing between the heat conduction plate 2 and the base 304. The heat conduction plate 2 and the base 304 can be disassembled to ensure that the space formed between the heat exchange tubes 305 on both sides is a sealed space. The air inside the shell 1 can only flow in this space. The space formed between the heat exchange tubes 305 on both sides is connected with the heat conduction tube 301 to ensure that the heat inside the shell 1 flows into the space and contacts the heat exchange tube 305.

[0029] See attached Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 The top of the base 304 is fixedly connected to the shell 1, and a connecting structure 4 is arranged around the end surface of the heat conducting plate 2. The connecting structure 4 includes a connecting rod 401, and the ends of the multiple connecting rods 401 are fixedly connected to the heat conducting plate 2. The inner side end of the connecting rod 401 is processed with a slot 4011, and the slot 4011 matches one side of the plug rod 403. The outer wall of the connecting rod 401 matches the connecting seat 402. The interior of the connecting seat 402 is slidably connected to the plug rod 403. The plug rod 403 can drive the spring 404 to be compressed during the sliding process along the connecting seat 402. The middle part of the plug rod 403 is fixedly connected to one end of the spring 404, and the other end of the spring 404 is fixedly connected to the connecting seat 402. The other side of the plug rod 403 is rotatably connected to the rotating block 405, and the connecting seat 402 is fixedly connected to one end of the fixed block 406. The fixed block 4 06 is fitted with a rotating block 405, and the rotating block 405 can rotate on the insertion rod 403, and the insertion rod 403 can slide on the connecting seat 402. A support portion 4051 is provided at the end of the rotating block 405, and the ends of multiple connecting seats 402 are fixedly connected to the shell 1. The axial length of the support portion 4051 is the same as the depth of the slot 4011, and the axial cross-section of the support portion 4051 is the same as the fixed block 406. When the rotating block 405 is pulled, the insertion rod 403 moves toward the rotating block 405 direction. When the insertion rod 403 is separated from the slot 4011, the rotating block 405 is rotated one hundred and eighty degrees. At this time, the support portion 4051 is fitted with the fixed block 406. The restrictions of the support portion 4051 and the fixed block 406 make it impossible for the elastic force of the spring 404 to drive the insertion rod 403 to reset. The reset position of the insertion rod 403 is as shown in FIG. Figure 7 shown.

[0030] Working principle:

[0031] When the solid oxide fuel cell stack is working, during the cooling water flow inside the heat exchange tube 305 through the hose heat exchange tube 305, the heat absorbed by the heat conductive plate 2 will be transferred to the cooling water inside the heat exchange tube 305, so as to achieve water cooling and heat dissipation. The motor 302 is started, and the output shaft of the motor 302 drives the fan blade 303 to rotate. The heat conductive tube 301 on one side cooperates with the motor 302 to drive the fan blade 303 to rotate, so that the hot air inside the shell 1 flows to the inside of the base 304, and flows along the space formed by the heat exchange tubes 305 on both sides, and contacts with the heat exchange tube 305 so that the cooling water flowing inside the heat exchange tube 305 absorbs the heat, and enters the shell 1 through the heat conductive tube 301 on the other side, so as to achieve heat dissipation inside the shell 1, thereby improving the heat dissipation efficiency of the solid oxide fuel cell stack, and avoiding the influence of external dust on the internal battery unit body 8;

[0032] When a fault occurs in the battery cell 8 inside the shell 1, the staff pulls the rotating block 405, and the rotating block 405 drives the insertion rod 403 to move in the direction of the rotating block 405. When the insertion rod 403 is separated from the slot 4011, the rotating block 405 is rotated one hundred and eighty degrees. At this time, the support part 4051 is in contact with the fixed block 406. The elastic force of the spring 404 cannot drive the insertion rod 403 to reset due to the restrictions of the support part 4051 and the fixed block 406. Similarly, the other rotating blocks 405 are pulled in turn, and then the staff moves the heat conducting plate 2 upward through the connecting rod 401, so that the heat conducting plate 2 is disassembled and removed from the outside of the shell 1, which increases the operating space for the staff during maintenance and makes the maintenance of the solid oxide fuel cell stack more convenient.

[0033] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A solid oxide fuel cell stack, comprising a shell (1), a top cover (5) is arranged on the top of the shell (1), a lock (7) is arranged on the top of the top cover (5), a plurality of battery cells (8) are arranged in the inner cavity of the shell (1), the battery cells (8) are clamped on a fixing frame (6), and the fixing frame (6) is fixedly connected to the end of a heat conducting plate (2), characterized in that: A plurality of first connection grooves (101) are processed on the side walls of both sides of the housing (1), and a heat dissipation structure (3) is arranged on the outer side of the first connection groove (101); The heat dissipation structure (3) comprises a heat conducting pipe (301), one side of the heat conducting pipe (301) matches the first connecting groove (101), and the heat conducting pipe (301) is fixed to the housing (1) by welding, the other side of the heat conducting pipe (301) matches the second connecting groove (3041), the second connecting groove (3041) is arranged at the side end of the base (304), and the heat conducting pipe (301) is fixed to the base (304) by welding, the insides of the heat conducting pipes (301) on both sides are respectively fixedly connected to the motor (302), the output shaft of the motor (302) is fixedly connected to the fan blade (303), the inside of the base (304) is fixedly connected to the heat exchange pipes (305) on both sides, connecting valves (306) are respectively arranged on both sides of the heat exchange pipe (305), and one end surface of the heat exchange pipe (305) is fixedly connected to the base (304).

2. A solid oxide fuel cell stack according to claim 1, characterized in that: The other end surfaces of the heat exchange tubes (305) on both sides are in contact with the heat conduction plate (2), ensuring that the heat conduction plate (2) is in contact with the heat exchange tubes (305).

3. A solid oxide fuel cell stack according to claim 1, characterized in that: The base (304) is fitted with the heat conducting plate (2), and a rubber sealing pad is provided between the contact surfaces of the base (304) and the side walls around the heat conducting plate (2), so as to ensure the sealing between the heat conducting plate (2) and the base (304) and enable the heat conducting plate (2) and the base (304) to be disassembled.

4. A solid oxide fuel cell stack according to claim 1, characterized in that: The space formed between the heat exchange tubes (305) on both sides is connected to the heat conduction tube (301), ensuring that the heat inside the shell (1) flows into the space and contacts the heat exchange tubes (305).

5. A solid oxide fuel cell stack according to claim 1, characterized in that: The top end of the base (304) is fixedly connected to the shell (1).

6. A solid oxide fuel cell stack according to claim 1, characterized in that: The end surface of the heat conducting plate (2) is provided with a connection structure (4) around it; The connection structure (4) comprises a connection rod (401), the ends of the plurality of connection rods (401) are fixedly connected to the heat conducting plate (2), a slot (4011) is processed on the inner side end of the connection rod (401), the slot (4011) matches one side of the insertion rod (403), the outer wall of the connection rod (401) matches the connection seat (402), the interior of the connection seat (402) is slidably connected to the insertion rod (403), the middle part of the insertion rod (403) is fixedly connected to one end of a spring (404), the other end of the spring (404) is fixedly connected to the connection seat (402), the other side of the insertion rod (403) is rotatably connected to a rotating block (405), the connection seat (402) is fixedly connected to one end of a fixed block (406), the other end of the fixed block (406) is in contact with the rotating block (405), and the end of the rotating block (405) is provided with a support portion (4051).

7. A solid oxide fuel cell stack according to claim 6, characterized in that: The ends of the plurality of connection seats (402) are all fixedly connected to the housing (1).

8. A solid oxide fuel cell stack according to claim 6, characterized in that: The axial length of the support portion (4051) is the same as the depth of the slot (4011), and the axial cross-section of the support portion (4051) is the same as that of the fixing block (406).

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