Lithium battery with double cooling structure

Abstract

The application relates to the field of lithium battery heat dissipation, in particular to a lithium battery with a double-cooling structure. The lithium battery comprises a battery box, the inner wall of the battery box is fixedly connected with second battery covers at the upper end and the lower end, the two second battery covers are fixedly connected with each other, the inner wall of the second battery cover is fixedly connected with water cooling mechanisms, lithium battery groups are arranged between the two second battery covers, the two water cooling mechanisms can clamp and fix the lithium battery groups and can also dissipate heat, a wind guide box is fixedly connected between the two second battery covers, a driving fan is fixedly connected to the end of the wind guide box away from the second battery cover, a temperature control mechanism is fixedly connected between the wind guide box and the second battery cover, an air cooling mechanism is also fixedly installed between the wind guide box and the second battery cover, and a ventilation opening is arranged at the left end of the second battery cover.

Description

Technical Field

[0001] This invention relates to the field of lithium battery heat dissipation, specifically to a lithium battery with a dual cooling structure. Background Technology

[0002] With the rapid development of new energy technologies, lithium batteries, as key energy storage devices, are widely used in electric vehicles, mobile electronic devices, energy storage power stations, and many other fields. Lithium batteries generate a large amount of heat during charging and discharging. If this heat cannot be dissipated effectively in time, the battery temperature will continue to rise, leading to a sharp decline in battery performance. Excessively high temperatures accelerate internal chemical reactions, causing faster capacity decay, shorter cycle life, and in severe cases, even thermal runaway, posing safety hazards.

[0003] Most existing cooling systems on the market cannot adjust their cooling based on temperature changes in different parts of the battery. They often use a uniform cooling strategy, leading to an unreasonable allocation of cooling resources. This results in the inability to effectively cool down localized areas of the battery, while wasting cooling resources in cooler areas.

[0004] Therefore, it is urgent to develop a new type of lithium battery with a heat dissipation structure that can simultaneously achieve air cooling and water cooling, and can reasonably distribute airflow according to the temperature of different parts of the lithium battery. This is of great significance for improving the performance, safety and service life of lithium batteries and promoting the development of the new energy industry.

[0005] A search revealed that prior art publication number CN116706329A discloses a novel lithium battery with a liquid cooling structure, including an upper end cover and a lower end cover, with a liquid cooling assembly disposed between the upper and lower end covers. The liquid cooling assembly includes heat dissipation fins, and serpentine liquid cooling pipes are disposed inside the heat dissipation fins. One end of each liquid cooling pipe has a liquid inlet, and the other end has a liquid outlet. Through the liquid cooling assembly, which includes heat dissipation fins and serpentine liquid cooling pipes, during use, coolant flows from the inlet to the outlet along with the serpentine liquid cooling pipes, allowing the temperature of the heat dissipation fins attached to the surface of the lithium battery to be dissipated along with the coolant. Due to the unidirectional inflow and outflow of the serpentine liquid cooling pipes, internal coolant backflow and temperature instability are prevented. At the same time, the heat dissipation fin design can absorb a significant amount of heat energy emitted by the battery, resulting in a good cooling effect.

[0006] Therefore, based on the above search and combined with existing methods, the above solutions only provide liquid cooling for the battery and cannot provide localized cooling or properly allocate the cooling mechanism, which has limitations. In order to solve the problems of not being able to provide localized cooling for the battery and properly allocate the cooling mechanism, we propose a lithium battery with a dual-cooling structure. Summary of the Invention

[0007] The purpose of this invention is to provide a lithium battery with a dual-cooling structure to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A lithium battery with a dual-cooling structure includes a battery box, with a second battery cover fixedly connected to both the upper and lower ends of the inner wall of the battery box, and the two second battery covers fixedly connected to each other. A water-cooling mechanism is fixedly connected to the inner wall of the second battery cover, and a lithium battery pack is also disposed between the two second battery covers. The two water-cooling mechanisms can clamp and fix the lithium battery pack and also dissipate heat.

[0010] An air guide box is fixedly connected between the two second battery covers. A drive fan is fixedly connected to the end of the air guide box away from the second battery cover. A temperature control mechanism is fixedly connected between the air guide box and the second battery cover. An air-cooling mechanism is also fixedly installed between the air guide box and the second battery cover. A ventilation opening is also provided at the left end of the second battery cover.

[0011] As a further aspect of this solution, the water-cooling mechanism includes a first battery cover, which is fixedly connected to the bottom of a second battery cover. Each inner wall of the second battery cover is fixedly connected to a heat dissipation pipe, and the two heat dissipation pipes are fixedly connected to each other through a pipe. A second partition is also provided above the heat dissipation pipe, and a first elastic telescopic rod that can reset the second partition is fixedly connected between the bottom of the second partition and the heat dissipation pipe. The upper end of the second partition is fixedly connected to the first partition.

[0012] As a further aspect of this solution, a water pump and a water tank are fixedly connected to the upper end of the first battery cover located inside the battery box. The water inlet of the water pump is fixedly connected to the water tank through a pipe, the water outlet of the water pump is fixedly connected to the adjacent heat dissipation pipe through a pipe, and the other heat dissipation pipe is connected to the water tank through a pipe.

[0013] As a further aspect of this solution, the temperature control mechanism includes two first partitions, each of which is fixedly connected to the outer wall of a corresponding second partition. The opposite ends of the two first partitions are in contact with the outer wall of the lithium battery pack. Several heat-conducting pipes are fixedly connected inside the first partitions. A connecting pipe is also fixedly connected to the left end of the first partition, and each heat-conducting pipe is fixedly connected to the connecting pipe. The heat-conducting pipes and the connecting pipes are filled with silicone oil.

[0014] As a further aspect of this solution, two rectangular tubes are fixedly connected to the bottom of the inner wall of the air guide box. Each rectangular tube is fixedly connected to a corresponding connecting pipe through a pipeline. A mating block with a reset function is slidably connected to the inner wall of the rectangular tube, and a movable arm is fixedly connected to the right end of the mating block.

[0015] As a further aspect of this solution, a movable block is slidably connected to the inner wall of the rectangular tube, and a first connecting block is also fixedly connected to the inner wall of the rectangular tube. Both the outer walls of the first connecting block and the movable block have several openings. The left end of the first connecting block abuts against the movable block, and an abutting rod is fixedly connected to the bottom of the movable block.

[0016] As a further aspect of this solution, the abutting rod is fixedly connected to the outer wall of the rectangular tube by a second spring. The second spring is sleeved on the outer wall of the abutting rod. One end of each of the two mating blocks is fixedly connected to a telescopic tube. A second connecting block is fixedly connected between the two telescopic tubes. Elastic telescopic arms are fixedly connected to both ends of the second connecting block.

[0017] As a further aspect of this solution, the air-cooling mechanism includes two rectangular ventilation openings, each with a movable plate on its left and right sides. Each movable plate is fixedly connected to the corresponding first battery cover via a pipe, and each movable plate is slidably connected to the inner wall of the air guide box.

[0018] As a further aspect of this solution, each of the movable plates is fixedly connected to a rack at its front end, and the two movable plates near the left and right ends of the inner wall of the air guide box are fixedly connected to the inner wall of the air guide box with a first spring. Each of the ventilation rectangular openings is rotatably connected to a transmission gear in its inner wall, and the upper and lower ends of the transmission gear mesh with the two adjacent racks.

[0019] As a further aspect of this solution, the bottom of the two movable plates located in the center of the inner wall of the air guide box are fixedly connected to abutment plates, and a connecting arm is fixedly connected between the two movable plates located in the center of the inner wall of the air guide box. The front end of the connecting arm is fixedly connected to the second connecting block, and two abutment strips are fixedly connected in the center of the inner wall of the air guide box.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. Start the water pump to draw water from the tank into the two heat dissipation pipes for circulation. When the first partition presses against the lithium battery pack and squeezes the first elastic telescopic rod, the heat dissipation pipe presses against the second partition to absorb heat. At the same time, start the drive fan to deliver gas to the first battery cover. After dissipating heat from the lithium battery pack, the gas is discharged through the vent. Water cooling and air cooling are combined to cool the battery pack. This can give full play to the advantages of water cooling's high-efficiency heat conduction and air cooling's rapid heat exchange, greatly improving heat dissipation efficiency. It can also flexibly allocate heat dissipation resources according to the temperature of different parts of the battery pack, accurately control the temperature, effectively extend the service life of the lithium battery, and ensure its stable performance and safe use.

[0022] 2. The two moving plates will move in opposite directions. When the abutting plate drives the corresponding moving plate to move, the moving plate will drive another connected moving plate to move through the connecting arm. The driven moving plate and the corresponding moving plate will move in opposite directions. This makes the space released by the two moving plates moving in opposite directions larger for the corresponding ventilation rectangular opening, while the space released by the other two moving plates becomes smaller. Through temperature regulation, the lithium battery pack can be evenly cooled and the air volume can be reasonably distributed, so that the lithium battery pack can be cooled better. Attached Figure Description

[0023] Figure 1 A front view of a lithium battery with a dual-cooling structure;

[0024] Figure 2 This is a teardown diagram of a lithium battery with a dual-cooling structure.

[0025] Figure 3 This is a schematic diagram of the internal structure of the second battery cover of a lithium battery with a dual-cooling structure.

[0026] Figure 4 This is a schematic diagram of the location structure of the second separator in a lithium battery with a dual-cooling structure.

[0027] Figure 5 This is a schematic diagram of the internal structure of the air duct box of a lithium battery with a dual cooling structure.

[0028] Figure 6 This is a schematic diagram of the ventilation rectangular opening structure of a lithium battery with a dual-cooling structure.

[0029] Figure 7 This is a schematic diagram of the movable plate position structure of a lithium battery with a dual-cooling structure.

[0030] Figure 8 A schematic diagram of the connection arm position structure of a lithium battery with a dual-cooling structure;

[0031] Figure 9 This is a schematic diagram of the internal structure of a rectangular tube in a lithium battery with a dual-cooling structure.

[0032] Figure 10 This is a schematic diagram of the location structure of the first connecting block in a lithium battery with a dual-cooling structure.

[0033] In the diagram: 1. Battery box; 3. First battery cover; 4. Second battery cover; 5. Lithium battery pack; 6. Water tank; 7. Water pump; 8. Ventilation vent; 9. Heat dissipation pipe; 10. Drive fan; 11. Air guide box; 12. Heat conduction pipe; 13. First partition.

[0034] 14. Connecting pipe; 15. Second partition plate; 16. First elastic telescopic rod; 18. Moving plate; 19. Rectangular tube; 20. Ventilation rectangular opening; 21. Slide rod; 22. Abutment strip; 23. Rack; 24. First spring; 25. Transmission gear; 26. Abutment plate; 27. Connecting arm; 28. Moving arm; 29. ​​Elastic telescopic arm; 30. Telescopic tube; 31. Second elastic telescopic rod;

[0035] 32. Moving block; 33. First connecting block; 34. Second spring; 35. Abutting rod; 36. Mating block; 37. Second connecting block; 101. Water cooling mechanism; 201. Temperature control mechanism; 301. Air cooling mechanism. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 - Figure 5 A lithium battery with a dual-cooling structure includes a battery box 1. A second battery cover 4 is fixedly connected to both the upper and lower ends of the inner wall of the battery box 1, and the two second battery covers 4 are fixedly connected to each other by bolts. A water-cooling mechanism 101 is fixedly connected to the inner wall of the second battery cover 4. A lithium battery pack 5 is also disposed between the two second battery covers 4. The two water-cooling mechanisms 101 can clamp and fix the lithium battery pack 5 and also dissipate heat. An air guide box 11 is also fixedly connected between the two second battery covers 4. A drive fan 10 is fixedly connected to the end of the air guide box 11 away from the second battery cover 4. A temperature control mechanism 201 is fixedly connected between the air guide box 11 and the second battery cover 4. An air-cooling mechanism 301 is also fixedly installed between the air guide box 11 and the second battery cover 4. A vent 8 is also provided at the left end of the second battery cover 4. A filter screen is fixedly connected inside the vent 8. The filter screen effectively filters out impurities in the air and also prevents external debris from falling into the second battery cover 4 through the vent 8.

[0038] Example 2: Please refer to Figure 3 - Figure 4 The water-cooling mechanism 101 includes a first battery cover 3, which is fixedly connected to the bottom of the second battery cover 4 (see reference). Figure 4 Each second battery cover 4 has a heat dissipation pipe 9 fixedly connected to its inner wall. Two heat dissipation pipes 9 are connected by a pipe, which is formed by alternating arcs and zigzags, resulting in an irregular overall shape. The heat dissipation pipes 9 are made of copper, which has good thermal conductivity, corrosion resistance, and high-temperature resistance. A second partition 15 is installed above the heat dissipation pipe 9. The bottom of the second partition 15 is fixedly connected to the heat dissipation pipe 9 by a first elastic telescopic rod 16, which can reset the second partition 15. A first partition 13 (see reference) is fixedly connected to the upper end of the second partition 15. Figure 3 , Figure 4 );

[0039] A water pump 7 and a water tank 6 are fixedly connected to the upper end of the first battery cover 3 located inside the battery box 1. The water inlet of the water pump 7 is fixedly connected to the water tank 6 through a pipe. The water outlet of the water pump 7 is fixedly connected to the adjacent heat dissipation pipe 9 through a pipe. The other heat dissipation pipe 9 is connected to the water tank 6 through a pipe.

[0040] Please see Figure 3 - Figure 10 The temperature control mechanism 201 includes two first partitions 13, each of which is fixedly connected to the outer wall of a corresponding second partition 15. The opposite ends of the two first partitions 13 are in contact with the outer wall of the lithium battery pack 5. Several heat dissipation vents are provided inside the first partitions 13 and the second partitions 15. The heat dissipation vents are arranged in a front-to-back array on the outer walls of the first partitions 13 and the second partitions 15. Several heat conduction pipes 12 are fixedly connected inside the first partitions 13. The heat conduction pipes 12 are arranged in an array from left to right inside the first partitions 13. A connecting pipe 14 is also fixedly connected to the left end of the first partitions 13. Each heat conduction pipe 12 is fixedly connected to the connecting pipe 14. The heat conduction pipes 12 and the connecting pipe 14 are filled with silicone oil. Silicone oil is a high-molecular-weight organosilicon compound. It is a colorless and odorless liquid. When the temperature reaches above 60 degrees Celsius, the distance between molecules will increase, resulting in expansion. It is also an excellent electrical insulating material and does not have electrical conductivity.

[0041] Two rectangular tubes 19 are fixedly connected to the bottom of the inner wall of the air guide box 11. The two rectangular tubes 19 are symmetrically distributed on the left and right sides of the bottom of the inner wall of the air guide box 11. Each rectangular tube 19 is fixedly connected to the corresponding connecting tube 14 through a pipe. The inner wall of the rectangular tube 19 is slidably connected to a mating block 36 with a reset function. A second elastic telescopic rod 31 is fixedly connected between the mating block 36 and the inner wall of the rectangular tube 19. The second elastic telescopic rod 31 can drive the mating block 36 to quickly reset. A movable arm 28 is fixedly connected to the right end of the mating block 36. A movable block 32 is slidably connected to the inner wall of the rectangular tube 19. A first connecting block 33 is also fixedly connected to the inner wall of the rectangular tube 19. Several openings are opened on the outer walls of the first connecting block 33 and the movable block 32. The left end of the first connecting block 33 abuts against the movable block 32. An abutting rod 35 is fixedly connected to the bottom of the movable block 32. The abutting rod 35 is connected to the outer wall of the rectangular tube 19 through a second spring 34.

[0042] Two mating blocks 36 are each fixedly connected to one end of a telescopic tube 30. A second connecting block 37 is fixedly connected between the two telescopic tubes 30. Elastic telescopic arms 29 are fixedly connected to both ends of the second connecting block 37. Figure 8 (as shown);

[0043] The air-cooling mechanism 301 includes two rectangular ventilation openings 20. Each rectangular ventilation opening 20 has a movable plate 18 on its left and right sides. Each movable plate 18 is fixedly connected to the corresponding first battery cover 3 through a pipe. Each movable plate 18 is slidably connected to the inner wall of the air guide box 11. Specifically, two sliding rods 21 are fixedly connected to the inner wall of the air guide box 11. The two sliding rods 21 are symmetrically distributed vertically on the inner wall of the air guide box 11. Each movable plate 18 has a sliding opening inside. The inner wall of each sliding opening is slidably connected to the outer wall of the corresponding sliding rod 21. When the movable plate 18 slides on the outer wall of the two sliding rods 21 through the sliding opening, the two sliding rods 21 can limit the movable plate 18 through the sliding opening and also have a guiding function, which improves the stability of the movable plate 18 when moving. The outer wall of the sliding rod 21 and the inner wall of the sliding opening are coated with lubricating oil. The lubricating oil can greatly reduce the friction between the movable plate 18 and the inner wall of the sliding opening and extend the service life of the sliding opening and the sliding rod 21.

[0044] Each movable plate 18 is fixedly connected to a rack 23 at its front end. The two movable plates 18 near the left and right ends of the inner wall of the air guide box 11 are fixedly connected to the inner wall of the air guide box 11 with a first spring 24. Each ventilation rectangular opening 20 is rotatably connected to a transmission gear 25 through a rotating shaft. The upper and lower ends of the transmission gear 25 are meshed with the two adjacent racks 23. The bottom of the two movable plates 18 located in the center of the inner wall of the air guide box 11 is fixedly connected to an abutment plate 26. The abutment plate 26 corresponds to the movable arm 28. A connecting arm 27 is also fixedly connected between the two movable plates 18 located in the center of the inner wall of the air guide box 11. The front end of the connecting arm 27 is fixedly connected to the second connecting block 37. Two abutment strips 22 are fixedly connected in the center of the inner wall of the air guide box 11, and the two abutment strips 22 are respectively set at the left and right ends of the inner side of the air guide box 11.

[0045] Specifically, when one of the abutment plates 26 is compressed, the compressed abutment plate 26 will drive the corresponding moving plate 18 to move. At this time, the moving moving plate 18 will drive the transmission gear 25 to rotate through the rack 23. The transmission gear 25 will drive another meshing rack 23 to move, thereby driving the fixed moving plate 18 to move. At this time, the two moving plates 18 will move in opposite directions. When the abutment plate 26 drives the corresponding moving plate 18 to move, the moving plate 18 will drive another connected moving plate 18 to move through the connecting arm 27. According to the above working principle, the driven moving plate 18 and the corresponding moving plate 18 will move in opposite directions. In order to prevent the two moving plates 18 from jamming the outer wall of the transmission gear 25 when they close, the moving plate 18 driven by the abutment plate 26 can be limited when it abuts the outer wall of the adjacent abutment strip 22 during its movement, so as to prevent the two moving plates 18 from jamming the transmission gear 25 when they close.

[0046] The working principle of this invention is as follows: When in use, only the water pump 7 needs to be started. The water pump 7 will pump water into the water tank 6 and deliver it into the two heat dissipation pipes 9. Then the water inside the heat dissipation pipes 9 will return to the water tank 6. When the outer wall of the first partition 13 abuts against the outer wall of the lithium battery pack 5, the first partition 13 will squeeze the first elastic telescopic rod 16. The outer wall of the heat dissipation pipe 9 abuts against the outer wall of the second partition 15. The heat dissipation pipe 9 will absorb heat from the second partition 15 and the first partition 13. At the same time, the drive fan 10 is started. The drive fan 10 will deliver gas into the air guide box 11. The gas will be delivered to the two first battery covers 3 through the two ventilation rectangular openings 20 inside the air guide box 11. The gas will dissipate heat from the lithium battery pack 5. Then the gas will be discharged through the ventilation opening 8.

[0047] During battery use, localized high temperatures are generated. When the temperature of the lower half of the lithium battery pack 5 rises—note that the temperature of the lower half of the lithium battery pack 5 rises first—heat will be transferred to all the heat pipes 12 through the first partition 13 when the temperature reaches above 60 degrees Celsius. At this time, the silicone oil inside the heat pipe 12 expands due to the increased temperature. The silicone oil inside the heat pipe 12 will enter the rectangular tube 19 on the bottom left side of the inner wall of the air guide box 11 through the connecting pipe 14. The silicone oil will pass through the openings inside the first connecting block 33 and the moving block 32, pushing the mating block 36. The mating block 36 will then drive the moving arm 28 to move. When the moving arm 28 moves, it will drive the adjacent abutment plate 26 to move. The abutment plate 26 will drive the second connecting block 37 to move through the connecting arm 27. The second connecting block 37 will drive all the elastic telescopic arms 29 to move. The elastic telescopic arm 29 at the right end of the second connecting block 37 will abut against the bottom wiring of the adjacent abutment rod 35. The abutment rod 35 will drive the moving block 32 to move upward. At this time, the through hole between the moving block 32 and the first connecting block 33 cannot be connected. Therefore, when the upper part heats up, the corresponding silicone oil cannot enter the interior of the rectangular tube 19, so the corresponding mating block 36 cannot move.

[0048] The pressed abutment plate 26 will drive the corresponding moving plate 18 to move. At this time, the moving plate 18 will drive the transmission gear 25 to rotate through the rack 23. The transmission gear 25 will drive another meshing rack 23 to move, thereby driving the fixed moving plate 18 to move. At this time, the two moving plates 18 will move in opposite directions. When the abutment plate 26 drives the corresponding moving plate 18 to move, the moving plate 18 will drive another connected moving plate 18 to move through the connecting arm 27. According to the above working principle, the driven moving plate 18 and the corresponding moving plate 18 will move in opposite directions. This makes the space released by the two moving plates 18 moving in opposite directions to the corresponding ventilation rectangular opening 20 larger, while the space released by the other two moving plates 18 becomes smaller, so that more gas will flow to the bottom of the lithium battery pack 5, and the bottom of the lithium battery pack 5 will be cooled first.

[0049] When the temperature at the bottom of the lithium battery pack 5 drops, the temperature of the heat pipe 12 inside the first partition 13 at the bottom decreases, and the silicone oil inside the heat pipe 12 contracts and recovers. Correspondingly, the silicone oil inside the rectangular tube 19 flows back to the connecting tube 14 and the heat pipe 12. When the mating block 36 resets, it will drive the second connecting block 37 to reset through the moving arm 28. When the second connecting block 37 resets, it will drive the elastic telescopic arm 29 to disengage from the abutment rod 35. If the temperature of the upper part of the lithium battery pack 5 rises, according to the above working principle, the upper part of the lithium battery pack 5 can be cooled down.

[0050] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lithium battery with a dual-cooling structure, comprising a battery case, characterized in that: The inner wall of the battery box is fixedly connected to the upper and lower ends of the second battery cover, and the two second battery covers are fixedly connected to each other. The inner wall of the second battery cover is fixedly connected to a water cooling mechanism. A lithium battery pack is also arranged between the two second battery covers. The two water cooling mechanisms can clamp and fix the lithium battery pack and also dissipate heat. An air guide box is fixedly connected between the two second battery covers. A drive fan is fixedly connected to the end of the air guide box away from the second battery cover. A temperature control mechanism is fixedly connected between the air guide box and the second battery cover. An air-cooling mechanism is also fixedly installed between the air guide box and the second battery cover. A ventilation opening is also provided at the left end of the second battery cover. The temperature control mechanism includes two first partitions, each of which is fixedly connected to the outer wall of the corresponding second partition. The opposite ends of the two first partitions are in contact with the outer wall of the lithium battery pack. Several heat-conducting pipes are fixedly connected inside the first partitions. A connecting pipe is also fixedly connected to the left end of the first partition. Each heat-conducting pipe is fixedly connected to the connecting pipe. The heat-conducting pipe and the connecting pipe are filled with silicone oil. Two rectangular tubes are also fixedly connected to the bottom of the inner wall of the air guide box. Each rectangular tube is fixedly connected to the corresponding connecting pipe through a pipe. A mating block with a reset function is slidably connected to the inner wall of the rectangular tube. A movable arm is fixedly connected to the right end of the mating block. The inner wall of the rectangular tube is slidably connected to a movable block, and the inner wall of the rectangular tube is also fixedly connected to a first connecting block. Both the outer walls of the first connecting block and the movable block have several openings. The left end of the first connecting block abuts against the movable block, and the bottom of the movable block is fixedly connected to an abutting rod. The abutment rod is fixedly connected to the outer wall of the rectangular tube by a second spring. The second spring is sleeved on the outer wall of the abutment rod. One end of each of the two mating blocks is fixedly connected to a telescopic tube. A second connecting block is fixedly connected between the two telescopic tubes. Elastic telescopic arms are fixedly connected to both ends of the second connecting block.

2. A lithium battery with a dual-cooling structure according to claim 1, characterized in that: The water-cooling mechanism includes a first battery cover, which is fixedly connected to the bottom of a second battery cover. A heat dissipation pipe is fixedly connected to the inner wall of each second battery cover. The two heat dissipation pipes are fixedly connected to each other through a pipe. A second partition is also provided above the heat dissipation pipe, and the bottom of the second partition is fixedly connected to the heat dissipation pipe through a first elastic telescopic rod. The upper end of the second partition is fixedly connected to the first partition.

3. A lithium battery with a dual-cooling structure according to claim 2, characterized in that: A water pump and a water tank are fixedly connected to the upper end of the first battery cover located inside the battery box. The water inlet of the water pump is fixedly connected to the water tank through a pipe, the water outlet of the water pump is fixedly connected to the adjacent heat dissipation pipe through a pipe, and the other heat dissipation pipe is connected to the water tank through a pipe.

4. A lithium battery with a dual-cooling structure according to claim 1, characterized in that: The air-cooling mechanism includes two rectangular ventilation openings. Each rectangular ventilation opening has a movable plate on its left and right sides. Each movable plate is fixedly connected to the corresponding first battery cover through a pipe. Each movable plate is slidably connected to the inner wall of the air guide box.

5. A lithium battery with a dual-cooling structure according to claim 4, characterized in that: Each of the movable plates is fixedly connected to a rack at its front end. Two movable plates near the left and right ends of the inner wall of the air guide box are fixedly connected to the inner wall of the air guide box with a first spring. A transmission gear is rotatably connected to the inner wall of each of the ventilation rectangular openings. The upper and lower ends of the transmission gear mesh with the two adjacent racks.

6. A lithium battery with a dual-cooling structure according to claim 5, characterized in that: The bottom of the two movable plates located in the center of the inner wall of the air guide box is fixedly connected to the abutment plate. A connecting arm is also fixedly connected between the two movable plates located in the center of the inner wall of the air guide box. The front end of the connecting arm is fixedly connected to the second connecting block. Two abutment strips are fixedly connected in the center of the inner wall of the air guide box.

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