Cooling device for preventing new energy battery pack from being overheated

Abstract

The invention discloses a cooling device for preventing a new energy battery pack from being overheated, and relates to the field of new energy battery overheat protection, the cooling device comprises a battery pack shell and a battery protection plate covering the bottom of the battery pack shell, and the outer surface of the battery protection plate is provided with a plurality of heat dissipation holes; a plurality of U-shaped cooling flow channels which are linearly distributed at equal intervals are fixedly installed in the battery pack shell, the circulating cooling unit is driven by the driving unit to operate in the backflow straight pipe, cooling liquid between the backflow straight pipe and the U-shaped cooling flow channels circularly flows, heat in the battery pack shell is brought to the outside and dissipated, and the cooling efficiency of the battery pack shell is improved. Under the action of the humidifying unit, water can be intermittently sprayed to the surface of the backflow straight pipe, heat can be absorbed when water on the outer wall of the pipe evaporates, and therefore the heat dissipation efficiency of the backflow straight pipe is improved, the circulating cooling unit is driven by wind power, no extra driving equipment needs to be arranged, and the bottom space of the new energy automobile is not excessively occupied; and the effective endurance of the new energy automobile is not influenced.

Description

Technical Field

[0001] The present invention relates to the field of overheat protection of new energy batteries, and in particular to a cooling device for preventing a new energy battery pack from overheating. Background Art

[0002] The heat dissipation and cooling mechanism of the new energy vehicle battery pack is a very important component. Once the temperature of the new energy vehicle battery pack is too high, it is easy to ignite the electrolyte inside the ternary lithium battery or lithium iron phosphate battery, eventually causing the battery pack to catch fire and cause serious damage to the vehicle.

[0003] The commonly used cooling methods for new energy battery packs are generally physical heat conduction and heat dissipation. By installing heat dissipation fins on the outer wall of the battery pack shell, the heat inside is transferred to the outside; or by designing a hollow partition board inside the battery pack shell, the partition board separates multiple battery modules, and then adding coolant inside the hollow partition board. The coolant circulates inside the partition board, which can more effectively transfer the heat inside the battery pack and cool it down. However, the above-mentioned methods of cooling the battery pack by conducting heat through the coolant require a circulating pump to drive the coolant in the partition plate to circulate. The circulating pump needs to be driven by the power of the battery pack, which will affect the effective endurance of the new energy vehicle. In addition, if the circulating pump is to effectively drive the coolant, its model is also large. The battery pack of the new energy vehicle is installed in the chassis of the vehicle. If a larger circulating pump is installed, it will occupy the chassis space of the new energy vehicle, affecting the installation of other auto parts. Summary of the invention

[0004] The object of the present invention is to provide a cooling device for preventing a new energy battery pack from overheating, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cooling device for preventing a new energy battery pack from overheating, comprising: a battery pack shell and a battery guard plate covering the bottom of the battery pack shell, the outer surface of the battery guard plate is provided with a plurality of heat dissipation holes, a plurality of U-shaped cooling channels distributed in a straight line and at equal intervals are fixedly installed inside the battery pack shell, and two mutually adjacent ports between two adjacent U-shaped cooling channels are butted against each other, a plurality of partitions are fixedly arranged inside the U-shaped wall of each U-shaped cooling channel, a plurality of the partitions and the U-shaped cooling channels divide the interior of the battery pack shell into a plurality of chambers distributed in a matrix, each chamber is equipped with a battery module, and a reflux straight pipe is fixedly connected between the exposed ends of the first and last U-shaped cooling channels; It also includes: a circulating cooling unit, which is used to drive the coolant in the plurality of the U-shaped cooling channels and the return straight pipe to circulate, and the circulating cooling unit is arranged inside the return straight pipe; A driving unit, which utilizes wind energy to drive the circulation cooling unit to operate, and the driving unit is arranged between the battery guard plate and the return straight pipe; The humidifying unit is used for spraying water mist on the surface of the reflux straight pipe to improve the heat dissipation effect of the reflux straight pipe. The humidifying unit is arranged on the outside of the driving unit.

[0006] Preferably, the circulating cooling unit includes at least two flared tubes fixedly connected and arranged in a straight line and equidistantly distributed in the middle section of the return straight pipe, each of the flared tubes is rotatably equipped with a rotating shaft, and the rotating shaft coincides with the axis of the flared tube, and the outer surface of the rotating shaft is also fixedly mounted with a blade wheel, and the blades of several blade wheels are oriented in the same direction, and each of the flared tubes is rotatably mounted with a transmission shaft on one side close to the battery guard plate, the transmission shaft is perpendicular to the axis of the flared tube, and one end of the transmission shaft close to the rotating shaft and the outer surface of the rotating shaft are fixedly mounted with a bevel gear, and the two bevel gears are meshed with each other, and when the blade wheel rotates, the coolant inside the return straight pipe can be transported, so that the coolant circulates inside the return straight pipe and several U-shaped cooling channels.

[0007] Preferably, the drive unit includes an assembly frame located on the side of the flared tube away from the battery pack shell, and the assembly frame is fixed to the battery guard plate, the interior of the assembly frame is hollow, a gear differential is placed on the inner side of the assembly frame, and the gear differential is fixedly assembled with the battery guard plate, the output end of the gear differential and the end of the drive shaft away from the rotating shaft are both equipped with transmission gears, and a synchronous toothed belt is installed between the two transmission gears, the input end of the gear differential is fixedly equipped with a drive shaft, and the outer surface of the drive shaft The fixed sleeve is provided with at least one impeller, and a spiral semicircular plate is fixedly hoisted inside the assembly frame, and the spiral semicircular plate surrounds the outside of the impeller, and an air guide arc plate is fixedly provided on the upper end of the spiral semicircular plate, and the air guide arc plate extends out of the battery guard plate, and the outer surface of the battery guard plate is provided with an air inlet for the air guide arc plate to pass through. When the new energy vehicle is driving fast, the air guide arc plate can inject high-speed airflow into the interior of the assembly frame through the air inlet, and the high-speed airflow spirally flows inside the spiral semicircular plate, which can drive the impeller and the drive shaft to rotate.

[0008] Preferably, the axis of the spiral semicircular plate is consistent with the axis of the drive shaft, and the impeller and the spiral semicircular plate do not contact each other to ensure that the impeller can rotate in the center of the spiral semicircular plate.

[0009] Preferably, one of the transmission gears is fixedly assembled with the output end of the gear differential, and a docking component is provided between the other transmission gear and the transmission shaft, that is, the output end of the gear differential drives the transmission shaft to rotate through two transmission gears and a synchronous belt.

[0010] Preferably, the docking component includes a plurality of swing arms movably mounted on the side wall of the transmission shaft and distributed equidistantly around the circumference, and the lower end of the swing arm is hinged to the transmission shaft, and a fourth spring for resetting is fixedly arranged between an end face of the swing arm away from the axis of the transmission shaft and the bottom of the transmission shaft, and the transmission gear located below the transmission shaft is rotatably assembled on the upper end face of the battery guard plate, a circular groove is provided on the upper end face of the transmission gear, and a plurality of straight grooves equidistantly around the circumference are provided on the inner wall of the circular groove, the swing arm movably cooperates with the straight groove, and a trigger for pressing the swing arm is also provided inside the transmission shaft, and when the swing arm swings downward, the swing arm will extend out of the transmission shaft and fit into the straight groove.

[0011] Preferably, the trigger member includes a second sealing cylinder concentrically fixedly arranged inside the transmission shaft, and a second piston disk is slidably mounted inside the second sealing cylinder, a push rod slidably passing through the second sealing cylinder and the transmission shaft is fixedly mounted at the bottom of the second piston disk, a straight cylinder column is placed above each of the swing arms, and the straight cylinder column is fixedly connected to the transmission shaft, a piston column is slidably mounted inside the straight cylinder column, and a pressure rod is fixedly arranged at one end of the piston column close to the swing arm through a third spring, an end of the pressure rod away from the piston column slides through the straight cylinder column, and a pressure foot for pressing the swing arm is also fixedly arranged at the exposed end of the pressure rod, and a conveying pipe is fixedly connected between the top of each straight cylinder column and the top of the second sealing cylinder, and when the transmission shaft pushes toward the inside of the circular groove, the push rod can be pushed toward the inside of the transmission shaft, prompting the second piston disk to convey the medium inside the second sealing cylinder to the inside of multiple straight cylinder columns.

[0012] Preferably, one end of the push rod away from the second piston disc extends out of the transmission shaft, which ensures that the push rod can be triggered each time the transmission shaft moves toward the inside of the circular groove.

[0013] Preferably, the humidifying unit includes a water tank located on the side of the return straight pipe, and the water tank is fixedly connected to the battery guard plate, a first sealing cylinder is provided on the side of the water tank away from the return straight pipe, and a first piston disk is slidably installed inside the first sealing cylinder, a column sliding through the first sealing cylinder is fixedly provided on the top of the first piston disk, and a first spring is fixedly installed between the top outer surface of the column and the first sealing cylinder, a counterweight ball is fixedly provided on the top of the first sealing cylinder through a second spring, a water inlet pipe is fixedly connected between the first sealing cylinder and the water tank, and an inclined water outlet pipe is also fixedly connected to the outer wall of the first sealing cylinder, an end of the water outlet pipe away from the first sealing cylinder faces the return straight pipe, and a nozzle is fixedly installed on the exposed end of the water outlet pipe, and a filling port is also provided on the top of the water tank, which can be connected to the air conditioning condensate drain pipe of the new energy vehicle, and the condensate is directly poured into the interior of the water tank, and then the nozzle sprays water to the return straight pipe.

[0014] Preferably, the elastic stiffness of the first spring is smaller than the elastic stiffness of the second spring, and the outside of the water inlet pipe and the water outlet pipe are both equipped with one-way valves. The second spring with the counterweight ball is higher than the column in the normal extended state, and the two one-way valves respectively limit the water inlet pipe so that only condensed water can flow through the water inlet pipe to the inside of the first sealing tube, and limit the condensed water inside the first sealing tube to be discharged only through the water outlet pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the circulating cooling unit to operate inside the reflux straight pipe through a driving unit, so that the coolant between the reflux straight pipe and the U-shaped cooling channel circulates, bringing the heat inside the battery pack shell to the outside and dissipating it. At the same time, when the new energy vehicle travels on a speed bump or other bumpy road section, the humidification unit will be triggered. Under the action of the humidification unit, water can be intermittently sprayed on the surface of the reflux straight pipe. The water on the outer wall of the pipe absorbs heat when evaporating, thereby improving the heat dissipation efficiency of the reflux straight pipe. The use of wind power to drive the circulating cooling unit does not require additional configuration of driving equipment, does not occupy too much bottom space of the new energy vehicle, and does not affect the effective endurance of the new energy vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the battery pack housing of the present invention; Figure 3 It is a schematic diagram of the U-shaped cooling channel and the reflux straight pipe structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 It is a schematic diagram of the structure of the spiral semicircular plate and the air guide arc plate of the present invention; Figure 6 This is a schematic diagram of the connection relationship between the transmission shaft and the transmission gear of the present invention; Figure 7 This is a schematic diagram of the internal structure of the transmission shaft of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Fig. 9 It is a schematic diagram of the structure of the humidification unit of the present invention.

[0017] In the figure: 1. Battery pack shell; 2. U-shaped cooling channel; 3. Battery module; 4. Return straight pipe; 5. Expanding pipe; 6. Battery guard plate; 7. Heat dissipation hole; 8. Assembly frame; 9. Water storage tank; 10. Air guide arc plate; 11. Water inlet pipe; 12. First sealing cylinder; 13. First piston disc; 14. Column; 15. First spring; 16. Second spring; 17. Counterweight ball; 18. Water outlet pipe; 19. Nozzle; 20. Filling port; 21. Rotating shaft ; 22. Blade wheel; 23. Gear differential; 24. Drive shaft; 25. Fan wheel; 26. Spiral semicircular plate; 27. Air inlet; 28. Transmission shaft; 29. ​​Transmission gear; 30. Bevel gear; 31. Straight groove; 32. Second sealing cylinder; 33. Push rod; 34. Second piston disk; 35. Straight column; 36. Delivery pipe; 37. Piston column; 38. Third spring; 39. Pressure rod; 40. Presser foot; 41. Swing arm; 42. Fourth spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1-Figure 5, a cooling device for preventing a new energy battery pack from overheating is shown in the figure, comprising: a battery pack shell 1 and a battery guard plate 6 covering the bottom of the battery pack shell 1, a plurality of heat dissipation holes 7 are provided on the outer surface of the battery guard plate 6, a plurality of U-shaped cooling channels 2 distributed in a straight line and at equal intervals are fixedly installed inside the battery pack shell 1, and two mutually adjacent ports between two adjacent U-shaped cooling channels 2 are butted against each other, a plurality of partitions are fixedly arranged inside the U-shaped wall of each U-shaped cooling channel 2, a plurality of partitions and the U-shaped cooling channels 2 divide the interior of the battery pack shell 1 into a plurality of chambers distributed in a matrix, a battery module 3 is installed in each chamber, and a reflux straight pipe 4 is fixedly connected between the exposed ends of the first and last U-shaped cooling channels 2; It also includes: a circulating cooling unit, which is used to drive the cooling liquid inside the plurality of U-shaped cooling channels 2 and the return straight pipe 4 to circulate, and the circulating cooling unit is arranged inside the return straight pipe 4; A driving unit, which utilizes wind energy to drive the operation of the circulating cooling unit, and the driving unit is arranged between the battery guard plate 6 and the return straight pipe 4; The humidifying unit is used to spray water mist on the surface of the reflux straight pipe 4 to improve the heat dissipation effect of the reflux straight pipe 4. The humidifying unit is arranged on the outside of the driving unit.

[0020] The circulating cooling unit includes at least two flared tubes 5 which are fixedly connected and arranged in a straight line and equidistantly distributed in the middle section of the return straight tube 4. A rotating shaft 21 is rotatably mounted inside each flared tube 5, and the rotating shaft 21 coincides with the axis of the flared tube 5. A blade wheel 22 is also fixedly mounted on the outer surface of the rotating shaft 21. The blades of several blade wheels 22 are oriented in the same direction. A transmission shaft 28 is rotatably mounted on one side of each flared tube 5 close to the battery guard plate 6. The transmission shaft 28 is perpendicular to the axis of the flared tube 5, and a bevel gear 30 is fixedly mounted on one end of the transmission shaft 28 close to the rotating shaft 21 and on the outer surface of the rotating shaft 21. The two bevel gears 30 are meshed with each other. When the blade wheel 22 rotates, the coolant inside the return straight tube 4 can be transported, so that the coolant circulates inside the return straight tube 4 and several U-shaped cooling channels 2.

[0021] The drive unit includes an assembly frame 8 located on the side of the flared tube 5 away from the battery pack housing 1, and the assembly frame 8 is fixed to the battery guard plate 6. The interior of the assembly frame 8 is hollow, and a gear differential 23 is placed inside the assembly frame 8, and the gear differential 23 is fixedly assembled with the battery guard plate 6. The output end of the gear differential 23 and the end of the drive shaft 28 away from the rotating shaft 21 are both equipped with a transmission gear 29, and a synchronous toothed belt is installed between the two transmission gears 29. The input end of the gear differential 23 is fixedly equipped with a drive shaft 24, and the outer surface of the drive shaft 24 is fixedly sleeved with at least one fan wheel 25. A spiral semicircular plate 26 is fixedly hoisted inside the assembly frame 8, and the spiral semicircular plate 26 surrounds the outside of the impeller 25. An air guide arc plate 10 is fixedly provided on the upper end of the spiral semicircular plate 26, and the air guide arc plate 10 extends out of the battery guard plate 6. The outer surface of the battery guard plate 6 is provided with an air inlet 27 for the air guide arc plate 10 to pass through. When the new energy vehicle is running fast, the air guide arc plate 10 can inject high-speed airflow into the interior of the assembly frame 8 through the air inlet 27. The high-speed airflow spirally flows inside the spiral semicircular plate 26, which can drive the impeller 25 and the drive shaft 24 to rotate.

[0022] The axis of the spiral semicircular plate 26 is consistent with the axis of the driving shaft 24 , and the impeller 25 and the spiral semicircular plate 26 do not contact each other, so as to ensure that the impeller 25 can rotate at the center of the spiral semicircular plate 26 .

[0023] How this solution works: When the battery pack housing 1 and the battery guard plate 6 are assembled on the bottom of the new energy vehicle, the direction of the battery guard plate 6 is as shown in the figure. Figure 1 As shown, the front end faces the front of the vehicle and the rear end faces the rear of the vehicle. During the driving of the new energy vehicle, since the air guide arc plate 10 extends out of the battery guard plate 6, it has a certain impedance effect on the high-speed airflow and guides the high-speed airflow to the inside of the assembly frame 8. Under the guidance of the air guide arc plate 10, the high-speed airflow will flow along the spiral semicircular plate 26, and its high-speed airflow will blow the fan wheel 25 and the drive shaft 24 to rotate inside the spiral semicircular plate 26, thereby driving the output end of the gear differential 23 to drive the transmission shaft 28 to rotate, and the transmission shaft 28 can drive the blade wheel 22 to rotate inside the flared tube 5 through two mutually meshing bevel gears 30. Since the interior of the reflux straight pipe 4, the flared tube 5 and the U-shaped cooling channel 2 are filled with coolant, when the blade wheel 22 rotates, it can drive the coolant to circulate, allowing the coolant to absorb the heat generated by the battery module 3 and take the heat out of the battery pack shell 1 for dissipation.

[0024] In the above scheme, there is no need to separately configure a device for driving the coolant flow in the U-shaped cooling channel 2 as in the prior art. In this scheme, the wind energy generated when the new energy vehicle is running is used as the driving force to realize the circulation of the coolant without occupying the electric energy of the new energy vehicle. Moreover, the cooling structure in this scheme is designed between the gap between the battery pack shell 1 and the battery guard plate 6, which can avoid excessive occupation of the chassis space of the new energy vehicle and affect the installation of other auto parts. Example 2: Please refer to Figure 2 and Fig. 9 This embodiment is a further description of the embodiment 1. The humidifying unit includes a water storage tank 9 located on the side of the return straight pipe 4, and the water storage tank 9 is fixedly connected to the battery guard plate 6. A first sealing cylinder 12 is arranged on the side of the water storage tank 9 away from the return straight pipe 4, and a first piston disc 13 is slidably mounted inside the first sealing cylinder 12. A column 14 that slides through the first sealing cylinder 12 is fixedly arranged on the top of the first piston disc 13, and a first spring 15 is fixedly mounted between the top outer surface of the column 14 and the first sealing cylinder 12. The top of the first sealing cylinder 12 is fixedly mounted with a second spring 15. 16 is fixedly provided with a counterweight ball 17, a water inlet pipe 11 is fixedly connected between the first sealing cylinder 12 and the water tank 9, and the outer wall of the first sealing cylinder 12 is also fixedly provided with an inclined water outlet pipe 18, the end of the water outlet pipe 18 away from the first sealing cylinder 12 is toward the return straight pipe 4, and the exposed end of the water outlet pipe 18 is fixedly equipped with a nozzle 19, and the top of the water tank 9 is also provided with a filling port 20, the filling port 20 can be connected with the air conditioning condensate drain pipe of the new energy vehicle, and the condensate is directly poured into the interior of the water tank 9, and then the nozzle 19 sprays water towards the return straight pipe 4.

[0025] The elastic stiffness of the first spring 15 is smaller than that of the second spring 16. The outside of the water inlet pipe 11 and the water outlet pipe 18 are both equipped with one-way valves. The second spring 16 with the counterweight ball 17 is higher than the column 14 in the normal extended state. The two one-way valves respectively limit the water inlet pipe 11 so that only condensed water can flow through the water inlet pipe 11 to the inside of the first sealing tube 12, and limit the condensed water inside the first sealing tube 12 to be discharged only through the water outlet pipe 18.

[0026] In this embodiment: During the driving process, the new energy vehicle will often encounter speed bumps, potholes, etc. on the road. After driving on them, the vehicle will experience obvious up and down bumps. Due to the influence of inertia, the counterweight ball 17 will also move rapidly upward and then rapidly downward. When resetting upward, due to the elastic tension of the second spring 16, the resetting movement distance of the counterweight ball 17 can pass through the initial position, that is, it will knock on the top of the column 14, so that the column 14 pushes the first piston disc 13 downward. At this time, the moisture inside the first sealing cylinder 12 can be sprayed out through the water outlet pipe 18 and the nozzle 19, and sprayed on the surface of the reflux straight pipe 4. When the moisture on the surface of the reflux straight pipe 4 evaporates, it will absorb heat, thereby improving the heat dissipation efficiency of the reflux straight pipe 4, that is, improving the cooling efficiency of the battery module 3; After the counterweight ball 17 is completely reset, the column 14 will also be reset under the action of the first spring 15. When new energy vehicles are driving on urban or rural roads, they are easy to encounter potholes or speed bumps on the road, so the counterweight ball 17 will frequently bounce up and down, and can frequently spray water on the surface of the return straight pipe 4.

[0027] In the above solution, the filling port 20 is connected to the air conditioning condensate drain pipe of the new energy vehicle. Example 3: Please refer to Figure 5 and Figure 6 This embodiment is a further description of Embodiment 1, in which one transmission gear 29 is fixedly assembled with the output end of the gear differential 23, and a docking component is provided between the other transmission gear 29 and the transmission shaft 28, that is, the output end of the gear differential 23 drives the transmission shaft 28 to rotate through two transmission gears 29 and a synchronous belt.

[0028] The docking components include a plurality of swing arms 41 movably mounted on the side walls of the transmission shaft 28 and distributed equidistantly around the circumference, and the lower end of the swing arm 41 is hinged to the transmission shaft 28, and a fourth spring 42 for resetting is fixedly arranged between an end face of the swing arm 41 away from the axis of the transmission shaft 28 and the bottom of the transmission shaft 28, and the transmission gear 29 located below the transmission shaft 28 is rotatably assembled on the upper end face of the battery guard plate 6, a circular groove is provided on the upper end face of the transmission gear 29, and a plurality of straight grooves 31 equidistantly distributed around the circumference are provided on the inner wall of the circular groove, the swing arm 41 is movably matched with the straight groove 31, and a trigger for pressing the swing arm 41 is also provided inside the transmission shaft 28, and when the swing arm 41 swings downward, the swing arm 41 will extend out of the transmission shaft 28 and fit into the straight groove 31.

[0029] The actuator comprises a second sealing cylinder 32 fixedly arranged concentrically inside the transmission shaft 28, and a second piston disc 34 is slidably mounted inside the second sealing cylinder 32, and a push rod 33 is fixedly mounted at the bottom of the second piston disc 34 and slides through the second sealing cylinder 32 and the transmission shaft 28. A straight column 35 is placed above each swing arm 41, and the straight column 35 is fixedly connected to the transmission shaft 28. A piston column 37 is slidably mounted inside the straight column 35, and one end of the piston column 37 close to the swing arm 41 is connected by a third spring 38. A pressure rod 39 is fixedly arranged, and one end of the pressure rod 39 away from the piston column 37 slides through the straight column 35, and a pressure foot 40 for pressing the swing arm 41 is fixedly arranged at the exposed end of the pressure rod 39. A conveying pipe 36 is fixedly connected between the top of each straight column 35 and the top of the second sealing cylinder 32. When the transmission shaft 28 pushes against the inside of the circular groove, the push rod 33 can be pushed into the inside of the transmission shaft 28, prompting the second piston disc 34 to convey the medium inside the second sealing cylinder 32 to the inside of multiple straight columns 35.

[0030] One end of the push rod 33 away from the second piston plate 34 extends out of the transmission shaft 28 , which ensures that the push rod 33 is triggered every time the transmission shaft 28 moves toward the inside of the circular groove.

[0031] In this embodiment: Considering that it is inconvenient to connect the transmission shaft 28 and the transmission gear 29 when the battery guard 6 is installed at the bottom of the new energy vehicle, a circular groove is opened at the upper end of the transmission gear 29 in this solution to expand the assembly surface, so that when the battery guard 6 is locked at the bottom of the new energy vehicle, the transmission shaft 28 can easily enter the circular groove, and when the battery guard 6 is gradually assembled with the vehicle chassis, the transmission shaft 28 also gradually extends into the circular groove. The push rod 33 will abut against the transmission gear 29 and push the push rod 33 into the second sealing cylinder 32, so that the second piston disc 34 pushes the medium into the straight column 35. At this time, the piston column 37 can move downward with the third spring 38 and the pressure rod 39, and the pressure foot 40 presses the swing arm 41 to make the swing arm 41 swing out of the transmission shaft 28. After swinging out, the swing arm 41 can be assembled with the straight groove 31. Through the cooperation of the swing arm 41 and the straight groove 31, the rotation of the transmission gear 29 can drive the transmission shaft 28 to rotate. The above-mentioned design makes it easier to assemble the internal transmission gear 29 of the battery shield 6 and the transmission shaft 28 .

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for preventing a new energy battery pack from overheating, characterized in that: include: A battery pack shell (1) and a battery protection plate (6) covering the bottom of the battery pack shell (1), the outer surface of the battery protection plate (6) being provided with a plurality of heat dissipation holes (7), the interior of the battery pack shell (1) being fixedly provided with a plurality of U-shaped cooling channels (2) distributed in a straight line and at equal intervals, and two mutually adjacent ports between two adjacent U-shaped cooling channels (2) being butted against each other, a plurality of partitions being fixedly provided inside the U-shaped wall of each U-shaped cooling channel (2), the plurality of partitions and the U-shaped cooling channels (2) dividing the interior of the battery pack shell (1) into a plurality of chambers distributed in a matrix, each chamber being provided with a battery module (3), and a return straight pipe (4) being fixedly connected between the exposed ends of the first and last U-shaped cooling channels (2); Also includes: A circulating cooling unit, used for driving the cooling liquid in the plurality of U-shaped cooling channels (2) and the return straight pipe (4) to circulate, the circulating cooling unit being arranged inside the return straight pipe (4); A driving unit, which utilizes wind energy to drive the circulation cooling unit to operate, wherein the driving unit is arranged between the battery guard plate (6) and the return straight pipe (4); A humidifying unit is used for spraying water mist onto the surface of the reflux straight pipe (4) to improve the heat dissipation effect of the reflux straight pipe (4); the humidifying unit is arranged outside the driving unit.

2. A cooling device for preventing overheating of a new energy battery pack according to claim 1, characterized in that: The circulating cooling unit comprises at least two flared tubes (5) fixedly connected and arranged in a straight line and equidistantly distributed in the middle section of the reflux straight tube (4); a rotating shaft (21) is rotatably mounted inside each flared tube (5); the rotating shaft (21) coincides with the axis of the flared tube (5); a blade wheel (22) is fixedly mounted on the outer surface of the rotating shaft (21); blades of a plurality of blade wheels (22) are oriented in the same direction; a transmission shaft (28) is rotatably mounted on a side of each flared tube (5) close to the battery guard plate (6); the transmission shaft (28) is perpendicular to the axis of the flared tube (5); a bevel gear (30) is fixedly mounted on one end of the transmission shaft (28) close to the rotating shaft (21) and on the outer surface of the rotating shaft (21); the two bevel gears (30) are meshed with each other.

3. A cooling device for preventing overheating of a new energy battery pack according to claim 2, characterized in that: The drive unit comprises an assembly frame (8) located on a side of the flared tube (5) away from the battery pack housing (1), and the assembly frame (8) is fixed to the battery shield (6), the interior of the assembly frame (8) is hollow, a gear differential (23) is placed inside the assembly frame (8), and the gear differential (23) is fixedly assembled with the battery shield (6), the output end of the gear differential (23) and the end of the transmission shaft (28) away from the rotating shaft (21) are both equipped with a transmission gear (29), and a synchronous toothed belt is installed between the two transmission gears (29). The input end of the gear differential (23) is fixedly mounted with a drive shaft (24), and the outer surface of the drive shaft (24) is fixedly sleeved with at least one impeller (25); a spiral semicircular plate (26) is fixedly suspended inside the assembly frame (8), and the spiral semicircular plate (26) surrounds the outside of the impeller (25); an air guide arc plate (10) is fixedly arranged at the upper end of the spiral semicircular plate (26), and the air guide arc plate (10) extends out of the battery guard plate (6); and an air inlet (27) for the air guide arc plate (10) to pass through is opened on the outer surface of the battery guard plate (6).

4. A cooling device for preventing overheating of a new energy battery pack according to claim 3, characterized in that: The axis of the spiral semicircular plate (26) is consistent with the axis of the drive shaft (24), and the impeller (25) and the spiral semicircular plate (26) do not contact each other.

5. A cooling device for preventing overheating of a new energy battery pack according to claim 3, characterized in that: One of the transmission gears (29) is fixedly assembled with the output end of the gear differential (23), and a docking component is provided between the other transmission gear (29) and the transmission shaft (28).

6. A cooling device for preventing overheating of a new energy battery pack according to claim 5, characterized in that: The docking component comprises a plurality of swing arms (41) movably mounted on the side wall of the transmission shaft (28) and distributed at equal intervals around the circumference, and the lower end of the swing arm (41) is hinged to the transmission shaft (28), and a fourth spring (42) having a reset function is fixedly arranged between an end face of the swing arm (41) away from the axis of the transmission shaft (28) and the bottom of the transmission shaft (28), and the transmission gear (29) located below the transmission shaft (28) is rotatably mounted on the upper end face of the battery guard plate (6), and a circular groove is provided on the upper end face of the transmission gear (29), and a plurality of straight grooves (31) distributed at equal intervals around the circumference are provided on the inner wall of the circular groove, and the swing arm (41) is movably matched with the straight groove (31), and a trigger member for pressing the swing arm (41) is also provided inside the transmission shaft (28).

7. A cooling device for preventing overheating of a new energy battery pack according to claim 6, characterized in that: The actuator comprises a second sealing cylinder (32) fixedly arranged concentrically inside the transmission shaft (28), and a second piston disc (34) is slidably mounted inside the second sealing cylinder (32), and a push rod (33) is fixedly arranged at the bottom of the second piston disc (34) and slidably penetrates the second sealing cylinder (32) and the transmission shaft (28), and a straight column (35) is placed above each swing arm (41), and the straight column (35) is fixedly connected to the transmission shaft (28), and the inner portion of the straight column (35) is fixedly connected to the transmission shaft (28). A piston column (37) is slidably mounted on the upper portion of the straight column (35), and a pressure rod (39) is fixedly arranged at one end of the piston column (37) close to the swing arm (41) via a third spring (38). An end of the pressure rod (39) away from the piston column (37) slides through the straight column (35), and a pressure foot (40) for pressing the swing arm (41) is fixedly arranged at the exposed end of the pressure rod (39). A delivery pipe (36) is fixedly arranged between the top of each straight column (35) and the top of the second sealing cylinder (32).

8. A cooling device for preventing a new energy battery pack from overheating according to claim 7, characterized in that: One end of the push rod (33) away from the second piston disc (34) extends out of the transmission shaft (28).

9. A cooling device for preventing overheating of a new energy battery pack according to claim 2, characterized in that: The humidifying unit comprises a water storage tank (9) located on the side of the return straight pipe (4), and the water storage tank (9) is fixedly connected to the battery guard plate (6); a first sealing cylinder (12) is arranged on the side of the water storage tank (9) away from the return straight pipe (4), and a first piston disc (13) is slidably mounted inside the first sealing cylinder (12); a column (14) slidably penetrating the first sealing cylinder (12) is fixedly mounted on the top of the first piston disc (13), and a first elastic member is fixedly mounted between the top outer surface of the column (14) and the first sealing cylinder (12). A counterweight ball (17) is fixedly arranged on the top of the first sealing cylinder (12) via a second spring (16); a water inlet pipe (11) is fixedly connected between the first sealing cylinder (12) and the water storage tank (9); and an inclined water outlet pipe (18) is also fixedly connected to the outer wall of the first sealing cylinder (12); one end of the water outlet pipe (18) away from the first sealing cylinder (12) faces the return straight pipe (4); and a nozzle (19) is fixedly mounted on the exposed end of the water outlet pipe (18); and a filling port (20) is also arranged on the top of the water storage tank (9).

10. A cooling device for preventing overheating of a new energy battery pack according to claim 9, characterized in that: The elastic stiffness of the first spring (15) is smaller than the elastic stiffness of the second spring (16), and the outsides of the water inlet pipe (11) and the water outlet pipe (18) are both equipped with one-way valves.

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