Group connecting device for cylindrical batteries

Abstract

The invention discloses a grouping connecting device for cylindrical batteries, which comprises a battery outer frame, a snakelike radiating pipe is fixedly mounted in the battery outer frame, a plurality of battery inner frames are arranged in the snakelike radiating pipe, a plurality of battery bodies are fixedly mounted in the plurality of battery inner frames, and an outer frame cover plate is fixedly connected to the top end of the battery outer frame. The grouping connecting device comprises an outer frame cover plate, a storage box is fixedly installed on the top of the outer frame cover plate, a small circulating pump is fixedly installed on one side of the connecting position of the storage box and the outer frame cover plate, and a heat dissipation mechanism is fixedly installed on the top of the storage box. Heat dissipation treatment is conducted on the water tank storing cooling water, the heat dissipation fins capable of swinging are arranged on the water tank, the heat dissipation efficiency is improved, meanwhile, dust falling on the heat dissipation fins can be effectively reduced, air channels are optimized through the blowing fan set and the side exhaust fan set, and heat dissipation is better facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting cylindrical batteries into groups, and specifically provides a device for connecting cylindrical batteries into groups. Background Art

[0002] Cylindrical lithium batteries are currently the mainstream power devices. Due to their small size, high energy density, and convenient portability, they are widely used in production and life. However, the voltage of a single cylindrical battery is usually low. Therefore, multiple cylindrical batteries often need to be assembled into a battery pack for use. Usually, the device for connecting cylindrical batteries into groups combines multiple cylindrical batteries through a plastic outer frame and dissipates heat inside the battery by means of water cooling. The heat inside is taken out and exchanged through the cooling pipes arranged inside to continuously exchange and dissipate heat. However, the above common device for connecting cylindrical batteries into groups still has deficiencies:

[0003] Traditional devices for connecting cylindrical batteries into groups generally use air cooling or water cooling for heat dissipation, and the heat dissipation effect is average. Local overheating may occur inside the cylindrical battery due to untimely heat dissipation.

[0004] In addition, part of the connecting device of the cylindrical battery adopts a plastic structure, and its connection structure is weak. If there is a collision, it is relatively easy to damage the internal cylindrical battery. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for connecting cylindrical batteries into groups to solve the problems in the above background art, that is, traditional devices for connecting cylindrical batteries into groups generally use air cooling or water cooling for heat dissipation, and the heat dissipation effect is average. Local overheating may occur inside the cylindrical battery due to untimely heat dissipation. In addition, part of the connecting device of the cylindrical battery adopts a plastic structure, and its connection structure is weak. If there is a collision, it is relatively easy to damage the internal cylindrical battery.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A device for connecting cylindrical batteries into groups, including a battery outer frame. A serpentine heat dissipation pipe is fixedly installed inside the battery outer frame. A plurality of battery inner frames are arranged inside the serpentine heat dissipation pipe. A plurality of battery bodies are fixedly installed inside the plurality of battery inner frames. The top of the battery outer frame is fixedly connected with an outer frame cover plate. A storage box is fixedly installed on the top of the outer frame cover plate. A small circulation pump is fixedly installed on one side of the connection between the storage box and the outer frame cover plate. A heat dissipation mechanism is fixedly installed on the top of the storage box.

[0007] Preferably, a plurality of bottom card seats are fixedly connected to the bottom of the inner wall of the battery outer frame. Bottom card slots are opened at the bottom of the battery inner frame. The surface of the bottom card seat is clamped inside the bottom card slot.

[0008] Preferably, a plurality of heat discharge grooves are formed on the surface of the battery inner frame. A cross partition is fixedly connected inside the battery inner frame. The battery inner frame forms four battery chambers through the cross partition. The battery body is fixedly installed inside the battery chambers. A limiting circular groove is formed in the middle of the cross partition. A plurality of limiting insertion rods are fixedly connected to the bottom of the outer frame cover plate. The surface of the limiting insertion rod is inserted into the inside of the limiting circular groove.

[0009] Preferably, the material of the battery inner frame is a metal material, and the surface of the battery inner frame is in contact connection with the surface of the serpentine heat dissipation pipe.

[0010] Preferably, one end of the serpentine heat dissipation pipe is fixedly communicated with a water inlet pipe, the other end of the serpentine heat dissipation pipe is fixedly communicated with a water outlet pipe, one end of the storage tank is fixedly communicated with a return pipe, and one end of the return pipe is communicated with one end of the water outlet pipe.

[0011] Preferably, one end of the small circulation pump is fixedly communicated with a water suction pipe, the other end of the small circulation pump is fixedly communicated with a water delivery pipe, one end of the water delivery pipe is communicated with one end of the water inlet pipe, and one end of the water suction pipe is communicated with the inside of the storage tank.

[0012] Preferably, the heat dissipation mechanism includes two heat dissipation support plates and a blowing fan group. Both of the two heat dissipation support plates are fixedly installed on the storage tank. A plurality of fin grooves are fixedly connected between the two heat dissipation support plates. A fin assembly is rotatably connected inside each of the plurality of fin grooves.

[0013] Preferably, the fin assembly includes a rotating support rod. Intermediate gears are fixedly connected to both ends of the rotating support rod. The rotating support rod is installed inside the fin groove. Heat dissipation fins are fixedly connected to the surface of the rotating support rod.

[0014] Preferably, the inside of the fin groove is filled with a high-viscosity thermal paste. The high-viscosity thermal paste is in contact connection with the storage tank. A plurality of side exhaust fans are arranged on the surface of the heat dissipation support plate. The blowing fan group is installed above the two heat dissipation support plates. Driven tooth teeth are fixedly connected to one side of both of the two heat dissipation support plates. A sliding groove is formed on one side of the connection between the driven tooth teeth and the heat dissipation support plate. A sliding tooth plate is slidably connected inside the sliding groove. An electric telescopic rod is fixedly installed on one side of the connection between the sliding groove and the heat dissipation support plate. One end of the electric telescopic rod is fixedly connected to one end of the sliding tooth plate. The two sides of the intermediate gear are respectively meshed with the sliding tooth plate and the driven tooth teeth. The high-viscosity thermal paste is in contact connection with the rotating support rod.

[0015] Preferably, a temperature controller and a temperature sensor are sequentially fixedly installed at one end of the connection between the storage tank and the outer frame cover plate. The temperature controller and the temperature sensor are electrically connected.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By connecting multiple cylindrical batteries through a small metal inner frame and then wrapping multiple small battery components with a large outer frame, the combined strength of the entire cylindrical battery pack can be effectively increased. Moreover, using a metal frame can increase the strength on the one hand and enhance the thermal conductivity on the other hand;

[0017] The battery is connected to the heat dissipation pipe, and the heat generated by the battery is carried out through the cooling water inside the heat dissipation pipe. An air-cooled heat dissipation mechanism is installed on the box for storing the cooling water to dissipate heat from the water tank for storing the cooling water. Heat dissipation fins that can swing are provided on the water tank to increase the heat dissipation efficiency and effectively reduce the dust falling on the heat dissipation fins. And the air duct is optimized through the blowing fan group and the side exhaust fan group, which is more conducive to the discharge of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the cylindrical battery grouping connection device of the present invention;

[0019] Figure 2 It is a structural diagram of the outer frame of the cylindrical battery grouping connection device of the present invention;

[0020] Figure 3 It is a structural diagram of the small battery group of the cylindrical battery grouping connection device of the present invention;

[0021] Figure 4 It is a structural diagram of the inner frame of the cylindrical battery grouping connection device of the present invention;

[0022] Figure 5 It is a structural diagram of the cooling pipe assembly of the cylindrical battery grouping connection device of the present invention;

[0023] Figure 6 It is a structural diagram of the heat dissipation mechanism of the cylindrical battery grouping connection device of the present invention;

[0024] Figure 7 It is a partial enlarged view A of the heat dissipation mechanism of the cylindrical battery grouping connection device of the present invention;

[0025] Figure 8 It is a structural diagram of the fin assembly of the cylindrical battery grouping connection device of the present invention.

[0026] In the figure: 1. Battery outer frame; 2. Bottom card seat; 3. Serpentine heat dissipation pipe; 4. Battery inner frame; 5. Heat dissipation slot; 6. Bottom card slot; 7. Cross partition; 8. Limit circular groove; 9. Battery body; 10. Water inlet pipe; 11. Water outlet pipe; 12. Outer frame cover plate; 13. Small circulation pump; 14. Storage tank; 15. Water suction pipe; 16. Water delivery pipe; 17. Return pipe; 18. Heat dissipation support plate; 19. Side exhaust fan; 20. Driven tooth; 21. Slide groove; 22. Sliding tooth plate; 23. Electric telescopic rod; 24. Fin groove; 25. High-viscosity thermal paste; 26. Rotating support rod; 27. Heat dissipation fin; 28. Intermediate gear; 29. Blowing fan group; 30. Temperature controller; 31. Temperature sensor. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Please refer to Figure 1-8 , the present invention provides a group connection device for cylindrical batteries, including a battery outer frame 1. A serpentine heat dissipation pipe 3 is fixedly installed inside the battery outer frame 1. A plurality of battery inner frames 4 are arranged inside the serpentine heat dissipation pipe 3. A plurality of battery bodies 9 are fixedly installed inside the plurality of battery inner frames 4. The top of the battery outer frame 1 is fixedly connected with an outer frame cover plate 12. A storage tank 14 is fixedly installed on the top of the outer frame cover plate 12. A small circulation pump 13 is fixedly installed on one side of the connection between the storage tank 14 and the outer frame cover plate 12. A heat dissipation mechanism is fixedly installed on the top of the storage tank 14.

[0029] Refer to Figure 2-5 , further, a plurality of bottom card seats 2 are fixedly connected to the bottom of the inner wall of the battery outer frame 1. Bottom card slots 6 are opened at the bottom of the battery inner frame 4. The surface of the bottom card seat 2 is clamped with the inside of the bottom card slot 6. A plurality of heat dissipation slots 5 are opened on the surface of the battery inner frame 4. A cross partition 7 is fixedly connected inside the battery inner frame 4. The battery inner frame 4 forms four battery chambers through the cross partition 7. The battery body 9 is fixedly installed inside the battery chamber. A limit circular groove 8 is opened in the middle of the cross partition 7. A plurality of limit insertion rods are fixedly connected to the bottom of the outer frame cover plate 12. The surface of the limit insertion rod is inserted into the inside of the limit circular groove 8. The material of the battery inner frame 4 is a metal material. The surface of the battery inner frame 4 is in contact connection with the surface of the serpentine heat dissipation pipe 3. One end of the serpentine heat dissipation pipe 3 is fixedly communicated with a water inlet pipe 10. The other end of the serpentine heat dissipation pipe 3 is fixedly communicated with a water outlet pipe 11. One end of the storage tank 14 is fixedly communicated with a return pipe 17. One end of the return pipe 17 is communicated with one end of the water outlet pipe 11. One end of the small circulation pump 13 is fixedly communicated with a water suction pipe 15. The other end of the small circulation pump 13 is fixedly communicated with a water delivery pipe 16. One end of the water delivery pipe 16 is communicated with one end of the water inlet pipe 10. One end of the water suction pipe 15 is communicated with the inside of the storage tank 14;

[0030] During use, a bottom card seat 2 corresponding to the number of battery inner frames 4 is fixedly connected to the bottom of the battery outer frame 1. The serpentine heat dissipation pipe 3 is installed inside the battery outer frame 1 while avoiding these bottom card seats 2. Before installing the battery inner frame 4 into the battery outer frame 1, the battery body 9 needs to be placed inside the battery inner frame 4. Heat dissipation grooves 5 are provided on the surface of the battery inner frame 4. The battery inner frame 4 is made of metal and is in contact connection with the serpentine heat dissipation pipe 3. Therefore, the heat generated by the battery body 9 can be directly transferred to the cooling water flowing inside the serpentine heat dissipation pipe 3. However, with the heat dissipation grooves 5 provided, heat can also be conducted to the serpentine heat dissipation pipe 3 through the internal air as a medium, reducing the heat of the battery body 9 itself. The battery is installed and fixed by a special glue for bonding the battery. The volume of one battery inner frame 4 is relatively small. After installing a cross partition 7 in the middle, four battery cavities are formed. The battery body 9 is placed inside the battery cavity. This metal battery inner frame 4 has a relatively high structural strength, good impact resistance, and better safety. A limiting circular groove 8 is provided in the middle of the cross partition 7. When installing a small battery group, the bottom card slots 6 provided at the bottom of the battery inner frame 4 are placed on the bottom card seats 2, which can reduce the shaking of the battery. Moreover, there are certain gaps between each battery inner frame 4, which can better dissipate heat and allow the heat of the battery to be better vented. A plurality of limiting insertion rods inserted inside the limiting circular grooves 8 are fixedly connected to the bottom of the outer frame cover plate 12. The outer frame cover plate 12 is tightened and fixed by bolts. At this time, the small battery group can also be limited in the vertical direction, and the movement of the internal battery can also be reduced. Each small battery group has at least two surfaces in contact with the serpentine heat dissipation pipe 3, and the cooling water can better take away the heat generated by the battery. When the battery is in use and the small circulation pump 13 is started, the small circulation pump 13 starts to pump out the cooling water inside the storage tank 14 through the water suction pipe 15, and then pressurizes the pumped cooling water to flow into the serpentine heat dissipation pipe 3 through the water delivery pipe 16 and the water inlet pipe 10. After filling the serpentine heat dissipation pipe 3, the cooling water that has taken away the battery heat flows back into the storage tank 14 through the water outlet pipe 11 and the return pipe 17 connected thereto.

[0031] Refer to Figure 6-8, Further, the heat dissipation mechanism includes two heat dissipation support plates 18 and a blower fan group 29. Both of the two heat dissipation support plates 18 are fixedly installed on the storage box 14. A plurality of fin slots 24 are fixedly connected between the two heat dissipation support plates 18. A fin assembly is rotatably connected inside each of the plurality of fin slots 24. The fin assembly includes a rotating support rod 26. Intermediate gears 28 are fixedly connected to both ends of the rotating support rod 26. The rotating support rod 26 is installed inside the fin slot 24. A heat dissipation fin 27 is fixedly connected to the surface of the rotating support rod 26. A high-viscosity thermal paste 25 is filled inside the fin slot 24. The high-viscosity thermal paste 25 is in contact connection with the storage box 14. A plurality of side exhaust fans 19 are arranged on the surface of the heat dissipation support plate 18. The blower fan group 29 is installed above the two heat dissipation support plates 18. Driven tooth teeth 20 are fixedly connected to one side of each of the two heat dissipation support plates 18. A chute 21 is opened on one side of the connection between the driven tooth teeth 20 and the heat dissipation support plate 18. A sliding tooth plate 22 is slidably connected inside the chute 21. An electric telescopic rod 23 is fixedly installed on one side of the connection between the chute 21 and the heat dissipation support plate 18. One end of the electric telescopic rod 23 is fixedly connected to one end of the sliding tooth plate 22. Both sides of the intermediate gear 28 are meshed and connected with the sliding tooth plate 22 and the driven tooth teeth 20 respectively. The high-viscosity thermal paste 25 is in contact connection with the rotating support rod 26. A temperature controller 30 and a temperature sensor 31 are sequentially fixedly installed at one end of the connection between the storage box 14 and the outer frame cover plate 12. The temperature controller 30 and the temperature sensor 31 are electrically connected;

[0032] During use, although the circulating cooling water can carry out the heat generated during battery use, after multiple cycles, the temperature of the cooling water will rise. As a result, the subsequent heat absorption effect on the battery will become worse, and it is very likely that the required heat dissipation intensity cannot be achieved. Therefore, it is necessary to dissipate the heat of the coolant inside the storage tank 14, so that a relatively objective heat dissipation cycle system can be continuously maintained. The storage tank 14 is made of a material with good thermal conductivity. A heat dissipation system is installed on one of its larger surfaces. Two heat dissipation support plates 18 are installed at both ends of the surface of the storage tank 14. A plurality of fin slots 24 are arranged therebetween. The fin slots 24 are hollow, and a high-viscosity thermal paste 25 is filled inside the fin slots 24. Coaxial holes are provided in the fin slots 24 and the heat dissipation support plates 18. The rotating support rod 26 is rotatably connected inside the fin slots 24. The high-viscosity thermal paste 25 filled inside the fin slots 24 can also contact the rotating support rod 26, and the rotating support rod 26 rotates inside the thermal paste, which is beneficial to disrupting the original layout of the thermal paste and is beneficial to generating a better heat conduction effect by re-layout. Driven teeth 20 are fixedly connected to one side of both heat dissipation support plates 18. A chute 21 is provided below the driven teeth 20. A sliding tooth plate 22 is slidably connected inside the chute 21. Both ends of the rotating support rod 26 pass through the heat dissipation support plates 18 and the fin slots 24, and intermediate gears 28 are provided at both ends of the rotating support rod 26. The intermediate gears 28 are located between the driven teeth 20 and the sliding tooth plates 22, and are respectively meshed with the driven teeth 20 and the sliding tooth plates 22 up and down. The two sliding tooth plates 22 are driven by electric telescopic rods 23 provided at one end thereof, and are assisted and controlled by a temperature sensor 31 and a temperature controller 30. When the temperature sensor 31 detects that the temperature is too high, the blower fan group 29 and the side exhaust fan 19 installed on one side of the heat dissipation support plate 18 are started for heat dissipation. The high-viscosity thermal paste 25 guides the heat of the storage tank 14 to the heat dissipation fins 27 fixedly connected to the rotating support rod 26. A plurality of heat dissipation fins 27 are installed at a certain inclination angle. At this time, the blower fan group 29 blows air towards the plurality of heat dissipation fins 27 to increase air fluidity and accelerate the heat dissipation efficiency of the heat dissipation fins 27. At the same time, the side exhaust fan 19 quickly discharges the heat flow between the heat dissipation fins 27 through the plurality of side exhaust fans 19, which can form a good heat dissipation air duct, greatly increasing the heat dissipation efficiency and being beneficial to the subsequent cooling water to dissipate heat from the battery better. When the temperature sensor 31 detects that the temperature of the storage tank 14 is relatively high, it transmits a signal to the temperature controller 30. At this time, the temperature controller 30 starts the electric telescopic rods 23. The two electric telescopic rods 23 are started simultaneously to drive the sliding tooth plates 22 on both sides to slide inside the chutes 21. When the sliding tooth plates 22 translate, they will drive the intermediate gears 28. The driven teeth 20 can make the intermediate gears 28 rotate more stably. The stroke of the electric telescopic rods 23 is set, so the intermediate gears 28 will only rotate a certain angle. The intermediate gears 28 are fixedly connected to the rotating support rod 26, so the rotating support rod 26 will be driven to rotate.The rotation of the rotating support rod 26 can drive the heat dissipation fins 27 to swing appropriately, and the swinging speed is moderate without damaging the heat dissipation fins 27 themselves. The use of high-viscosity thermal paste 25 can effectively reduce the situation of the thermal paste being thrown out. On the one hand, the swinging heat dissipation fins 27 can shake off part of the dust on the heat dissipation fins 27, on the other hand, it can enhance the air flow, and can effectively increase the utilization rate of the heat dissipation area and strengthen the heat dissipation effect. Controlled by the temperature sensor 30 and the temperature controller 31, the two heat dissipation modes can be accurately switched, which is beneficial to saving energy.

[0033] When the embodiment of the present application is in use: A plurality of small battery groups are arranged inside the battery outer frame 1. The outer frames of the small battery groups are made of metal materials. On the one hand, it can have a good protection effect, and on the other hand, it has an advantage in thermal conductivity. And if some of the multiple small battery groups have problems, they can be repaired and maintained separately, saving the battery body 9 and maintenance costs. All the small battery groups are in contact with the serpentine heat dissipation tube 3. The cooling water inside the serpentine heat dissipation tube 3 can well take out the heat generated by the battery. And the storage tank 14 for storing the cooling water is provided with a heat dissipation mechanism, which can effectively prevent the cooling water inside the storage tank 14 from overheating and affecting the heat dissipation of the battery. It should be noted that the present invention is a group connection device for cylindrical batteries, and the components are all common standard parts or parts known to those skilled in the art. Its structure and principle can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle place of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and the adapted monitoring computer and power supply, are connected by wires. For the specific connection means, reference should be made to the above working principle for the sequential working order between the electrical components to complete the electrical connection. Its detailed connection means are well-known technologies in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A group connection device for cylindrical batteries, comprising a battery frame (1), characterized in that: A serpentine heat dissipation tube (3) is fixedly installed inside the battery outer frame (1), a plurality of battery inner frames (4) are arranged inside the serpentine heat dissipation tube (3), a plurality of battery bodies (9) are fixedly installed inside the plurality of battery inner frames (4), the top of the battery outer frame (1) is fixedly connected to an outer frame cover plate (12), a storage box (14) is fixedly installed on the top of the outer frame cover plate (12), a small circulation pump (13) is fixedly installed on one side of the connection between the storage box (14) and the outer frame cover plate (12), and a heat dissipation mechanism is fixedly installed on the top of the storage box (14).

2. A group connection device for cylindrical batteries according to claim 1, characterized in that: A plurality of bottom clamping seats (2) are fixedly connected to the bottom of the inner wall of the battery outer frame (1), a bottom clamping slot (6) is provided at the bottom of the battery inner frame (4), and the surface of the bottom clamping seat (2) is clamped with the inside of the bottom clamping slot (6).

3. A group connection device for cylindrical batteries according to claim 1, characterized in that: The surface of the battery inner frame (4) is provided with a plurality of heat dissipation grooves (5), the interior of the battery inner frame (4) is fixedly connected with a cross partition (7), the battery inner frame (4) forms four battery cavities through the cross partition (7), the battery body (9) is fixedly installed inside the battery cavity, a limiting circular groove (8) is provided in the middle of the cross partition (7), and the bottom of the outer frame cover (12) is fixedly connected with a plurality of limiting plug rods, and the surface of the limiting plug rods is plugged into the interior of the limiting circular groove (8).

4. A group connection device for cylindrical batteries according to claim 1, characterized in that: The battery inner frame (4) is made of metal, and the surface of the battery inner frame (4) is in contact and connected with the surface of the serpentine heat dissipation tube (3).

5. A group connection device for cylindrical batteries according to claim 1, characterized in that: One end of the serpentine heat dissipation pipe (3) is fixedly connected to a water inlet pipe (10), the other end of the serpentine heat dissipation pipe (3) is fixedly connected to a water outlet pipe (11), one end of the storage box (14) is fixedly connected to a return pipe (17), and one end of the return pipe (17) is connected to one end of the water outlet pipe (11).

6. A group connection device for cylindrical batteries according to claim 5, characterized in that: One end of the small circulation pump (13) is fixedly connected to a water extraction pipe (15), and the other end of the small circulation pump (13) is fixedly connected to a water delivery pipe (16). One end of the water delivery pipe (16) is connected to one end of the water inlet pipe (10), and one end of the water extraction pipe (15) is connected to the interior of the storage box (14).

7. A group connection device for cylindrical batteries according to claim 1, characterized in that: The heat dissipation mechanism comprises two heat dissipation support plates (18) and a blower fan group (29); the two heat dissipation support plates (18) are fixedly mounted on the storage box (14); a plurality of fin slots (24) are fixedly connected between the two heat dissipation support plates (18); and a fin assembly is rotatably connected inside the plurality of fin slots (24).

8. A group connection device for cylindrical batteries according to claim 7, characterized in that: The fin assembly comprises a rotating support rod (26), both ends of which are fixedly connected to intermediate gears (28), the rotating support rod (26) is installed inside the fin slot (24), and the surface of the rotating support rod (26) is fixedly connected to a heat dissipation fin (27).

9. A group connection device for cylindrical batteries according to claim 8, characterized in that: The interior of the fin groove (24) is filled with a high-viscosity thermal conductive paste (25), and the high-viscosity thermal conductive paste (25) is in contact with the storage box (14). The surface of the heat dissipation support plate (18) is provided with a plurality of side exhaust fans (19), and the blowing fan group (29) is installed above the two heat dissipation support plates (18). One side of the two heat dissipation support plates (18) is fixedly connected with a driven tooth (20), and one side of the connection between the driven tooth (20) and the heat dissipation support plate (18) is provided with a sliding A slot (21) is provided, wherein the interior of the slot (21) is slidably connected to a sliding tooth plate (22), an electric telescopic rod (23) is fixedly installed on one side of the connection between the slot (21) and the heat dissipation support plate (18), one end of the electric telescopic rod (23) is fixedly connected to one end of the sliding tooth plate (22), two sides of the intermediate gear (28) are respectively meshed and connected to the sliding tooth plate (22) and the driven teeth (20), and the high-viscosity thermal conductive paste (25) is in contact with the rotating support rod (26).

10. A group connection device for cylindrical batteries according to claim 1, characterized in that: A temperature controller (30) and a temperature sensor (31) are fixedly mounted in sequence at one end of the connection between the storage box (14) and the outer frame cover plate (12); the temperature controller (30) and the temperature sensor (31) are electrically connected.

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