A new energy battery pack with high heat dissipation efficiency

Abstract

The application discloses a new energy battery pack with high heat dissipation efficiency, which comprises a tray, an upper cover, a fixed shell in the tray and the upper cover, a battery module composed of a plurality of battery cells, an air cooling assembly and a liquid cooling assembly for heat dissipation of the battery module, the air cooling assembly comprises a first air guide strip on the tray and a second air guide strip on the upper cover, the liquid cooling assembly comprises a liquid cooling seat at the bottom of the fixed shell and a heat dissipation hole groove in the fixed shell, a piston plate is arranged in the liquid cooling seat, the piston plate, the liquid cooling seat and the bottom of the fixed shell form a cavity in communication with the heat dissipation hole groove, and cooling liquid is injected into the cavity. The air cooling assembly and the liquid cooling assembly can not only realize rapid heat dissipation of the plurality of battery modules, but also realize uniform heat dissipation, so that the temperature in the battery pack can be controlled in a constant range, and the service life, performance and reliability of the battery are ensured.

Description

Technical Field

[0001] This invention relates to the field of new energy battery technology, and more specifically, to a new energy battery pack with high-efficiency heat dissipation. Background Technology

[0002] With the rapid development of new energy vehicle technology, the performance of power batteries, as the core component of new energy vehicles, directly affects the performance of the entire vehicle. Temperature control has a great impact on batteries, so it is particularly important to keep the battery pack within a suitable temperature range. Excessive temperature can lead to chemical decomposition, electrolyte evaporation, or even thermal runaway (causing fire or explosion), while also accelerating battery aging, reducing capacity and lifespan.

[0003] Current heat dissipation methods are mostly air cooling and liquid cooling. Air cooling uses air as the cooling medium to remove heat from the battery surface. It utilizes airflow generated by fans and other auxiliary devices for heat dissipation. As the airflow moves from one side of the battery pack to the other, it carries away heat, but the air temperature also gradually increases. This results in rapid heat dissipation on the intake side and poorer heat dissipation on the exhaust side, leading to uneven heat dissipation.

[0004] Liquid cooling involves placing a liquid cooling plate under the battery module. As the coolant circulates inside the liquid cooling plate, it can carry away the heat from the battery. However, this method still has the aforementioned drawbacks. The coolant will continuously absorb heat as it flows, causing its own temperature to rise, which will greatly reduce the heat dissipation effect at the end.

[0005] In conclusion, the current heat dissipation method still has shortcomings and cannot effectively dissipate heat from the battery pack, so it needs to be improved. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, the purpose of this invention is to provide a new energy battery pack with high-efficiency heat dissipation, including a tray and a top cover, and a fixed outer shell located within the tray and the top cover. The fixed outer shell is used to fix a battery module composed of multiple cells, and also includes an air-cooling component and a liquid-cooling component for heat dissipation of the battery module.

[0008] The air-cooling assembly includes a first air guide strip located on a tray and a second air guide strip located on a top cover. The top surface of the first air guide strip is connected to a first connecting pipe, the top end of the first connecting pipe is connected to a second connecting pipe, and the bottom surface of the second air guide strip is connected to a third connecting pipe for docking with the second connecting pipe. The walls of the third connecting pipe and the second connecting pipe are uniformly provided with through holes.

[0009] The liquid cooling assembly includes a liquid cooling base located at the bottom of the fixed housing and a heat dissipation slot opened inside the fixed housing. A piston plate is provided inside the liquid cooling base. The piston plate, the liquid cooling base and the bottom of the fixed housing enclose a cavity that communicates with the heat dissipation slot. Coolant is injected into the cavity.

[0010] The bottom surface of the piston plate extends vertically upward to form a groove, and a magnet is embedded in the groove wall. An electromagnet is provided on the liquid cooling base directly below the magnet, and the electromagnet and the magnet have the same magnetic pole at opposite ends.

[0011] As a preferred technical solution:

[0012] As described above, a new energy battery pack with high-efficiency heat dissipation has multiple elongated first grooves on the tray and multiple elongated second grooves on the top cover. The first air guide strip is embedded in the first groove, and the second air guide strip is embedded in the second groove. The first air guide strip and the second air guide strip correspond one-to-one.

[0013] With the above technical solution, since the first air guide strip is embedded in the first groove and the second air guide strip is embedded in the second groove, the first air guide strip and the second air guide strip do not occupy the internal space of the battery pack. In this way, the capacity of the battery pack will not be reduced while ensuring the heat dissipation effect.

[0014] As described above, a new energy battery pack with high-efficiency heat dissipation has multiple through slots on one side of the top cover. The first air guide strip and the second air guide strip are both hollow. The first air guide strip is closed at both ends, the second air guide strip is closed at one end, and the other end of the second air guide strip is open and extends into the inner through slot.

[0015] Through the above technical solution, the structural design of the first and second air guides allows the airflow inside the first air guide to be introduced into the second air guide, and then the airflow will be ejected from the through slot through the opening end of the second air guide, thus achieving continuous heat dissipation.

[0016] As described above, in a high-efficiency heat dissipation new energy battery pack, a diversion strip is welded to one end of the first air guide strip and the second air guide strip. A guide hole is opened at the welded connection between the first air guide strip, the second air guide strip and the diversion strip. The side of the diversion strip is connected to the air outlet of the fan through a duct. Multiple air outlet holes are opened on the other side of the diversion strip.

[0017] With the above technical solution, as the heat inside the battery pack is continuously absorbed, air can be introduced into the battery pack through the vent, thus achieving air circulation and ensuring that the inside of the battery pack can maintain a constant temperature.

[0018] As described above, in a high-efficiency heat dissipation new energy battery pack, the inner diameter of the first connecting pipe is larger than the inner diameter of the second connecting pipe, the inner diameter of the second connecting pipe is equal to the diameter of the third connecting pipe, and a sealing ring is fitted and fixed on the outer circular wall of the third connecting pipe.

[0019] Through the above technical solution, the size design of the third connecting pipe and the second connecting pipe allows the third connecting pipe to be inserted into the second connecting pipe, and after insertion, the sealing ring can be pressed against the end face of the second connecting pipe, thereby ensuring that the third connecting pipe and the second connecting pipe can be sealed and connected.

[0020] As described above, in a high-efficiency heat dissipation new energy battery pack, the first connecting pipe is located between two fixed outer shells, and multiple first and third connecting pipes are equally spaced, with the first and third connecting pipes corresponding one-to-one.

[0021] With the above technical solution, the first connecting pipe and the third connecting pipe correspond to each other, so that when the tray and the top cover are assembled, the third connecting pipe can be accurately inserted into the second connecting pipe, which is a reasonable structure.

[0022] As described above, in a high-efficiency heat dissipation new energy battery pack, both the liquid cooling base and the piston plate are hollow structures. The top surface of the liquid cooling base is open, and the bottom surface of the liquid cooling base is fixed on a tray. A rubber ring is fixedly bonded to the side wall of the piston plate, and the piston plate is sealed to the inner wall of the liquid cooling base through the rubber ring.

[0023] Through the above technical solution, the liquid cooling base and the fixed shell are sealed by welding or other means to ensure that the coolant in the cavity will not leak. The fixed shell is made of metal and contacts the battery module through a thermally conductive silicone pad. This can fully absorb the heat emitted by the battery module. When the coolant flows inside, it can carry away the heat, thereby indirectly dissipating heat from the battery module.

[0024] As described above, a new energy battery pack with high-efficiency heat dissipation has multiple parallel heat-conducting fins integrally formed on the inner wall of the piston plate. An air inlet pipe and an air outlet pipe are respectively passed through the bottom wall of the piston plate on both sides of the groove. The bottom ends of the air inlet pipe and the air outlet pipe pass through the liquid cooling seat and are connected to the top surface of the first air guide strip.

[0025] A partition is integrally formed on the inner wall of the first air guide strip. The partition has a U-shaped cross section. A connecting cavity is formed between the partition and the first air guide strip. The air outlet pipe is connected to the first connecting pipe through the connecting cavity.

[0026] With the above technical solution, the piston plate is made of metal. While it is constantly squeezing the coolant, the heat of the coolant is conducted to the heat-conducting fins inside the piston plate. When air flows through the inside of the piston plate, it can carry away the heat on the heat-conducting fins, thereby indirectly cooling the coolant and ensuring the heat dissipation effect of the coolant.

[0027] As described above, in a new energy battery pack with high-efficiency heat dissipation, a long strip of tubing is fixed on the inner wall of the first air guide strip, and the surface of the tubing does not contact the bottom surface of the partition.

[0028] With the above technical solution, since the electromagnet needs to be connected to the circuit through a cable, a conduit is provided. By passing the cable through the conduit and then connecting the electromagnet to the cable, the cable can be organized through the conduit to avoid being scattered and disordered, and at the same time, the cable can be protected.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] (1) The Venturi effect and distributed flow synergy of the air-cooled system, the variable diameter design of the first and second connecting pipes (decreasing inner diameter) causes the airflow velocity in the second connecting pipe to increase sharply, forming a low-pressure area; combined with the through holes in the walls of the third and second connecting pipes, the hot air inside the battery pack is evenly drawn into the pipe, overcoming the problem of uneven heat dissipation of "cold at the air inlet and hot at the air outlet" in traditional air cooling; the diversion strip replenishes air into the battery pack through the air outlet, forming a closed-loop air circulation, maintaining the dynamic balance of internal air pressure and temperature.

[0031] (2) The liquid cooling system’s pulsating cooling and air cooling heat recovery work together. The electromagnet and the magnetic block repel each other, driving the piston plate to reciprocate. This forces the coolant to flow pulsatingly between the cavity and the heat dissipation slots, avoiding the efficiency decay caused by the temperature rise at the tail end of the traditional liquid cooling system. The heat-conducting fins inside the piston plate absorb the heat of the coolant and directly exchange heat with the air cooling airflow introduced through the air inlet pipe (the airflow carries away the heat through the inside of the piston plate), thus achieving active cooling of the liquid cooling system. The airflow after heat exchange is introduced into the connecting cavity through the air outlet pipe and finally merges into the main air cooling airflow for discharge, forming an energy recovery link.

[0032] (3) System-level optimization of spatial layout and thermal management: the first / second air guide strip is embedded in the tray / top cover groove, and the liquid cooling base is integrated into the bottom of the fixed shell, occupying zero cell space and ensuring the energy density of the battery pack; the multi-stage diversion design of the air cooling airflow between the air guide strip, connecting pipe and piston plate realizes point-to-point heat dissipation coverage for each battery module; the linkage between the electromagnetic drive piston and the air cooling airflow enables the liquid cooling system to be activated only when the temperature rise exceeds the standard, reducing system energy consumption. Attached Figure Description

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is a top perspective view of the tray and top cover of the present invention;

[0035] Figure 2 This is a bottom perspective view of the tray and top cover of the present invention;

[0036] Figure 3 This is an exploded perspective view of the tray, fixing housing, and battery module of the present invention;

[0037] Figure 4 This is a perspective view of the first connecting pipe, the second connecting pipe, and the third connecting pipe of the present invention;

[0038] Figure 5 This is a perspective view of the fixed housing, liquid cooling base, and piston plate of the present invention;

[0039] Figure 6 This is a perspective cross-sectional view of the first air guide bar of the present invention;

[0040] Figure 7 This is a cross-sectional view of the liquid cooling base and piston plate of the present invention;

[0041] Figure 8 This is a side sectional view of the liquid cooling seat and piston plate of the present invention.

[0042] In the diagram: 1. Tray; 2. Top cover; 3. Fixed outer shell; 4. Battery module; 5. First groove; 6. Second groove; 7. First air guide strip; 8. Second air guide strip; 9. First connecting pipe; 10. Second connecting pipe; 11. Third connecting pipe; 12. Through hole; 13. Sealing ring; 14. Through groove; 15. Diverter strip; 16. Conduit; 17. Liquid cooling base; 18. Piston plate; 19. Cavity; 20. Heat dissipation hole groove; 21. Groove; 22. Electromagnet; 23. Magnet block; 24. Heat-conducting fins; 25. Air inlet pipe; 26. Air outlet pipe; 27. Partition plate; 28. Conduit; 29. ​​Connecting cavity. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0045] like Figures 1-5 As shown, this embodiment of the invention discloses a new energy battery pack with high-efficiency heat dissipation, including a tray 1 and a top cover 2, and a fixed outer shell 3 located inside the tray 1 and the top cover 2. The fixed outer shell 3 is used to fix a battery module 4 composed of multiple cells.

[0046] It also includes air-cooled and liquid-cooled components for dissipating heat from battery module 4.

[0047] The air-cooled assembly includes a first air guide strip 7 located on the tray 1 and a second air guide strip 8 located on the upper cover 2. The top surface of the first air guide strip 7 is connected to a first connecting pipe 9, the top end of the first connecting pipe 9 is connected to a second connecting pipe 10, and the bottom surface of the second air guide strip 8 is connected to a third connecting pipe 11 for docking with the second connecting pipe 10. Through holes 12 are evenly provided on the walls of the third connecting pipe 11 and the second connecting pipe 10.

[0048] A diversion strip 15 is welded to one end of the first air guide strip 7 and the second air guide strip 8. A guide hole is opened at the welded connection between the first air guide strip 7, the second air guide strip 8 and the diversion strip 15. The side of the diversion strip 15 is connected to the air outlet of the fan through the duct 16. Multiple air outlet holes are opened on the other side of the diversion strip 15.

[0049] The inner diameter of the first connecting pipe 9 is greater than the inner diameter of the second connecting pipe 10. The inner diameter of the second connecting pipe 10 is equal to the diameter of the third connecting pipe 11. A sealing ring 13 is fitted and fixed on the outer circular wall of the third connecting pipe 11.

[0050] The liquid cooling assembly includes a liquid cooling base 17 located at the bottom of the fixed housing 3, and a heat dissipation slot 20 opened inside the fixed housing 3. A piston plate 18 is provided inside the liquid cooling base 17. The piston plate 18, the liquid cooling base 17 and the bottom of the fixed housing 3 surround and form a cavity 19 that communicates with the heat dissipation slot 20. Coolant is injected into the cavity 19.

[0051] The bottom surface of the piston plate 18 extends vertically upward to form a groove 21. A magnet 23 is embedded in the groove wall of the groove 21. An electromagnet 22 is provided on the liquid cooling base 17 directly below the magnet 23. The opposite ends of the electromagnet 22 and the magnet 23 are the same magnetic poles.

[0052] Specifically, after the tray 1 and the top cover 2 are assembled, the bottom end of the third connecting pipe 11 can be inserted into the second connecting pipe 10, at which point the second connecting pipe 10 and the third connecting pipe 11 are connected to each other.

[0053] When the battery pack is working, the battery module 4 continuously generates heat, which is conducted to the fixed housing 3 and the inside of the battery pack. After the fan is started, it can draw in outside air and send it into the diversion strip 15 through the duct 16. Then, the airflow enters the first air guide strip 7 through the guide holes on the diversion strip 15 and the first air guide strip 7. The airflow in the first air guide strip 7 is diverted to each of the first connecting pipes 9. The airflow then flows to the second air guide strip 8 through the second connecting pipe 10 and the third connecting pipe 11, thus defining the path of airflow. Due to the size design of the first connecting pipe 9 and the second connecting pipe 10, the airflow in the first connecting pipe 9 is... When the air enters the second connecting pipe 10, the airflow velocity increases due to the sudden reduction in pipe diameter. At this time, the pressure in the area inside the second connecting pipe 10 and the third connecting pipe 11 is lower than the external pressure, thus creating a suction effect. That is, the hot air inside the battery pack is drawn into the second connecting pipe 10 and the third connecting pipe 11 through the through hole 12. The hot air flows into the second air guide 8 along with the airflow. By continuously drawing away the hot air, the inside of the battery pack can be cooled down quickly. During this process, the outside air is replenished into the battery pack through the air outlet on the side of the diverter 15, thereby realizing air circulation and continuous heat dissipation.

[0054] Those skilled in the art will understand that when the aforementioned air cooling cannot quickly cool the battery pack, the electromagnet 22 is energized. When energized, the electromagnet 22 generates magnetic force, at which point the electromagnet 22 and the magnet block 23 repel each other, thus pushing the piston plate 18 upward through the magnet block 23. When the piston plate 18 moves upward, it can squeeze the coolant in the cavity 19 into the heat dissipation slot 20. When the electromagnet 22 is deactivated, the repulsive force disappears, and the piston plate 18 returns to its original position under the action of gravity. At this time, the coolant in the heat dissipation slot 20 flows back into the cavity 19. In this way, by intermittently energizing the electromagnet 22 or changing the direction of the current in the electromagnet 22, the piston plate 18 can be made to move vertically back and forth. In this way, the coolant can continuously flow in the heat dissipation slot 20 to carry away the heat from the fixed shell 3, thereby indirectly dissipating heat from the battery module 4. Through the cooperation of the air cooling component and the liquid cooling component, rapid cooling can be achieved, and the internal temperature of the battery pack can be controlled within a constant range.

[0055] In one specific embodiment of the present invention, a plurality of elongated first grooves 5 are provided on the tray 1, and a plurality of elongated second grooves 6 are provided on the upper cover 2. A first air guide 7 is embedded in the first groove 5, and a second air guide 8 is embedded in the second groove 6. The first air guide 7 and the second air guide 8 correspond one-to-one.

[0056] The top cover 2 has multiple through slots 14 on one side. The first air guide 7 and the second air guide 8 are both hollow. The first air guide 7 is closed at both ends, the second air guide 8 is closed at one end, and the other end of the second air guide 8 is open and extends into the inner through slot 14.

[0057] The first connecting pipe 9 is located between the two fixed outer shells 3. There are multiple first connecting pipes 9 and third connecting pipes 11 distributed at equal intervals, and the first connecting pipes 9 and third connecting pipes 11 correspond one-to-one with each other.

[0058] Specifically, such as Figure 2 and Figure 3 As shown, the first air guide 7 is embedded in the first groove 5, and the second air guide 8 is embedded in the second groove 6. In this way, the first air guide 7 and the second air guide 8 do not occupy the internal space of the battery pack, ensuring that the battery pack capacity is not affected. At the same time, it also makes the inner surface of the tray 1 and the top cover 2 flat, which is convenient for assembling other components such as the battery module 4.

[0059] The through slot 14 allows heat from inside the battery pack to be drawn into the second connecting pipe 10 and the third connecting pipe 11, then enter the second air guide 8 with the airflow, and finally be discharged from the through slot 14 through the opening end of the second air guide 8. This allows the heat inside the battery pack to be continuously discharged, thus achieving heat dissipation.

[0060] Multiple first connecting pipes 9 are provided, which can be evenly distributed inside the battery pack and generate suction in multiple parts inside the battery pack, thereby evenly absorbing heat and achieving good heat dissipation.

[0061] In one specific embodiment of the present invention, both the liquid cooling base 17 and the piston plate 18 are hollow structures. The top surface of the liquid cooling base 17 is open, and the bottom surface of the liquid cooling base 17 is fixed on the tray 1. A rubber ring is fixedly bonded to the side wall of the piston plate 18, and the piston plate 18 is sealed and fitted to the inner wall of the liquid cooling base 17 through the rubber ring.

[0062] Multiple parallel heat-conducting fins 24 are integrally formed on the inner wall of the piston plate 18. An air inlet pipe 25 and an air outlet pipe 26 are respectively passed through the bottom wall of the piston plate 18 on both sides of the groove 21. The bottom ends of the air inlet pipe 25 and the air outlet pipe 26 pass through the liquid cooling base 17 and are connected to the top surface of the first air guide strip 7.

[0063] A partition 27 is integrally formed on the inner wall of the first air guide strip 7. The partition 27 has a "U" shaped cross section. A connecting cavity 29 is formed between the partition 27 and the first air guide strip 7. The air outlet pipe 26 is connected to the first connecting pipe 9 through the connecting cavity 29.

[0064] A long strip of tubing 28 is fixed on the inner wall of the first air guide 7. The surface of the tubing 28 does not contact the bottom surface of the partition 27.

[0065] Specifically, such as Figure 6 , and 7 and Figure 8 As shown, when the piston plate 18 moves vertically inside the liquid cooling base 17, the rubber ring ensures that all the coolant in the cavity 19 is squeezed into the multiple heat dissipation slots 20. As the piston plate 18 moves back and forth, the coolant can flow back and forth continuously in the heat dissipation slots 20, thereby continuously carrying away the heat from the fixed outer shell 3.

[0066] As the coolant absorbs heat, its own temperature gradually rises, which reduces the heat transfer efficiency. The piston plate 18 is made of metal and has multiple heat-conducting fins 24 distributed inside. The temperature of the coolant can be transferred to the piston plate 18 and the heat-conducting fins 24.

[0067] When the air in the first air guide 7 is flowing, the airflow will be diverted to the air outlet pipe 26. At this time, the airflow is guided into the piston plate 18. When the airflow flows inside the piston plate 18, it can pass through multiple heat-conducting fins 24 and continuously carry away the heat from the heat-conducting fins 24. In this way, the coolant is cooled down, which improves the heat dissipation effect of the coolant on the fixed shell 3.

[0068] The air inside the piston plate 18 will eventually be discharged through the exhaust pipe 26. Due to the setting of the baffle 27, the air inside the exhaust pipe 26 will not re-enter the first air guide 7, but will enter the first connecting pipe 9 through the connecting cavity 29. Through this design, the air entering the piston plate 18 is natural wind, ensuring the heat exchange effect with the piston plate 18 and the heat-conducting fins 24.

[0069] The partition 27 does not completely isolate the interior of the first air guide 7. When the air flows through the first air guide 7, it will be diverted to multiple air outlet pipes 26. This allows for simultaneous heat exchange with the piston plates 18 in multiple liquid cooling bases 17, thereby enabling uniform heat dissipation for multiple battery modules 4.

[0070] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0071] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-efficiency heat dissipation new energy battery pack, comprising a tray (1) and a top cover (2), and a fixed outer shell (3) located within the tray (1) and the top cover (2), wherein the fixed outer shell (3) is used to fix a battery module (4) composed of multiple battery cells, characterized in that: It also includes air-cooled and liquid-cooled components for heat dissipation of the battery module (4), The air-cooled assembly includes a first air guide strip (7) located on a tray (1) and a second air guide strip (8) located on a top cover (2). The top surface of the first air guide strip (7) is connected to a first connecting pipe (9), the top end of the first connecting pipe (9) is connected to a second connecting pipe (10), and the bottom surface of the second air guide strip (8) is connected to a third connecting pipe (11) for docking with the second connecting pipe (10). Through holes (12) are evenly provided on the walls of the third connecting pipe (11) and the second connecting pipe (10). The liquid cooling assembly includes a liquid cooling base (17) located at the bottom of the fixed housing (3) and a heat dissipation slot (20) opened inside the fixed housing (3). A piston plate (18) is provided inside the liquid cooling base (17). The piston plate (18), the liquid cooling base (17), and the bottom of the fixed housing (3) enclose a cavity (19) that communicates with the heat dissipation slot (20). Coolant is injected into the cavity (19). The bottom surface of the piston plate (18) extends vertically upward to form a groove (21). A magnet (23) is embedded in the groove wall of the groove (21). An electromagnet (22) is provided on the liquid cooling seat (17) directly below the magnet (23). The electromagnet (22) and the magnet (23) are opposite to each other with the same magnetic pole. The inner diameter of the first connecting pipe (9) is greater than the inner diameter of the second connecting pipe (10), the inner diameter of the second connecting pipe (10) is equal to the diameter of the third connecting pipe (11), and a sealing ring (13) is fitted and fixed on the outer circular wall of the third connecting pipe (11).

2. The high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: The tray (1) has multiple long strip-shaped first grooves (5), and the top cover (2) has multiple long strip-shaped second grooves (6). The first air guide strip (7) is embedded in the first groove (5), and the second air guide strip (8) is embedded in the second groove (6). The first air guide strip (7) and the second air guide strip (8) correspond one-to-one.

3. The high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: The top cover (2) has multiple through slots (14) on one side. The first air guide (7) and the second air guide (8) are both hollow. The first air guide (7) is closed at both ends. The second air guide (8) is closed at one end and open at the other end, extending into the inner through slot (14).

4. The high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: A diversion strip (15) is welded to one end of the first air guide strip (7) and the second air guide strip (8). A guide hole is opened at the welded connection between the first air guide strip (7), the second air guide strip (8) and the diversion strip (15). The side of the diversion strip (15) is connected to the air outlet of the fan through the guide tube (16). Multiple air outlet holes are opened on the other side of the diversion strip (15).

5. A high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: The first connecting pipe (9) is located between two fixed shells (3). There are multiple first connecting pipes (9) and third connecting pipes (11) distributed at equal intervals. The first connecting pipes (9) and third connecting pipes (11) correspond one-to-one.

6. A high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: Both the liquid cooling base (17) and the piston plate (18) are hollow structures. The top surface of the liquid cooling base (17) is open. The bottom surface of the liquid cooling base (17) is fixed on the tray (1). A rubber ring is fixedly bonded to the side wall of the piston plate (18). The piston plate (18) is sealed to the inner wall of the liquid cooling base (17) through the rubber ring.

7. A high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: Multiple parallel heat-conducting fins (24) are integrally formed on the inner wall of the piston plate (18). An air inlet pipe (25) and an air outlet pipe (26) are respectively passed through the bottom wall of the piston plate (18) on both sides of the groove (21). The bottom ends of the air inlet pipe (25) and the air outlet pipe (26) pass through the liquid cooling seat (17) and are connected to the top surface of the first air guide strip (7).

8. A high-efficiency heat dissipation new energy battery pack according to claim 7, characterized in that: A partition (27) is integrally formed on the inner wall of the first air guide strip (7). The partition (27) has a "U" shaped cross section. A connecting cavity (29) is formed between the partition (27) and the first air guide strip (7). The air outlet pipe (26) is connected to the first connecting pipe (9) through the connecting cavity (29).

9. A high-efficiency heat dissipation new energy battery pack according to claim 1, characterized in that: A long strip-shaped conduit (28) is fixed on the inner wall of the first air guide strip (7), and the surface of the conduit (28) does not contact the bottom surface of the partition (27).

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