Thermal management device for new energy power battery pack

Abstract

The invention discloses a thermal management device for a new energy power battery pack, and relates to the technical field of new energy batteries, the thermal management device comprises a bottom plate and a top cover, and the bottom plate and the top cover are spliced to form a battery pack shell; and a heat management assembly is mounted in the battery pack shell and comprises a main heat dissipation plate fixedly connected to the middle of the bottom plate. The invention discloses a heat management device for a new energy power battery pack. A continuous flow channel network is formed through the main heat dissipation plate, the branch heat dissipation plates and the heat dissipation pipes communicated with the interiors of the main heat dissipation plate and the branch heat dissipation plates, cooling liquid is forcibly circulated in a closed loop and connected with a vehicle liquid cooling assembly through a water circulation connector, and the cooling liquid is diffused from the main heat dissipation plate to the branch heat dissipation plates on the two sides and then returns through the communicating pipes to form directional flow. According to the structure, the heat exchange area is increased by utilizing the heat dissipation pipes distributed in the honeycomb shape, so that heat generated by the battery cells is efficiently taken away, the heat dissipation efficiency is remarkably improved, and performance reduction caused by overheating of the battery pack is avoided.

Description

Technical Field

[0001] This invention relates to the field of new energy battery technology, specifically a thermal management device for new energy power battery packs. Background Technology

[0002] The thermal management device of a new energy power battery pack is a system used to maintain the battery pack's operating temperature within the optimal range for safety, performance, and lifespan. It removes excess heat at high temperatures to prevent safety risks caused by overheating.

[0003] For example, Chinese Patent CN105453330B discloses a device for thermal management of a battery pack for electric energy storage units assembled in a rigid housing. The device includes a thermal storage device incorporated into the battery pack. The thermal storage device includes a chamber containing a phase change material and having a volume for exchanging heat with the energy storage units. The volume is defined by at least a portion of the housing. The melting of the phase change material can store heat, and the solidification of the phase change material can release previously stored heat.

[0004] For example, Chinese Patent CN107112608B discloses a thermal management device for a battery pack, which includes a battery box with an outward protrusion on the inner circumference, two first heat dissipation plates equipped with bidirectional fans, a second heat dissipation plate equipped with several cooling fans, two additional heat dissipation plates with several ventilation holes, a heater, and a battery management circuit. The thermal management device for the battery pack creatively solves the contradictory requirements of the existing battery box for a good heat dissipation structure and a heating and insulation structure, ensuring that the battery pack in the battery system can charge and discharge in a suitable environment, controlling the temperature rise and temperature difference inside the battery box, improving the cycle life of the battery pack, and reducing various safety risks caused by high and low temperatures.

[0005] Most of the aforementioned existing technologies improve the overall structure, but the existing thermal management devices for new energy power battery packs have low heat dissipation efficiency due to the heat generated by the battery cells. Traditional heat dissipation devices have simple flow channels and uneven coolant flow, which can easily cause heat accumulation and affect battery life and safety. Summary of the Invention

[0006] The purpose of this invention is to provide a thermal management device for new energy power battery packs, so as to solve the problems of low heat dissipation efficiency caused by heat generation of battery cells, simple flow channels and uneven flow of coolant in existing thermal management devices for new energy power battery packs in the above-mentioned background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a thermal management device for a new energy power battery pack, comprising a base plate and a top cover, wherein the base plate and the top cover are spliced ​​together to form a battery pack shell; The battery pack housing is equipped with a thermal management component. The thermal management component includes a main heat sink plate fixedly connected to the middle of the base plate. Both sides of the main heat sink plate are fixedly connected to equally spaced auxiliary heat sink plates. The main heat sink plate is equipped with heat dissipation pipes arranged in a honeycomb pattern. The auxiliary heat sink plates are also equipped with heat dissipation pipes. The heat dissipation pipes inside the auxiliary heat sink plates are connected to the heat dissipation pipes inside the main heat sink plate. The end of the auxiliary heat sink plate away from the main heat sink plate is connected to it through a connecting pipe. The heat dissipation pipes inside the auxiliary heat sink plates are interconnected through the connecting pipes.

[0008] Furthermore, both ends of the main heat sink are provided with water circulation connectors, and both ends of the water circulation connectors extend to the outer sides of both ends of the base plate. The water circulation connectors are connected to the liquid cooling components inside the vehicle and to the heat dissipation pipes inside the main heat sink and the branch heat sink.

[0009] Furthermore, the water circulation connector has a connecting joint in the middle of both the upper and lower sides, and the water circulation connector is connected to the water passage inside the bottom plate and the top cover through the connecting joints at both ends.

[0010] Furthermore, the main heat sink, the branch heat sink, and the connecting pipe are arranged to form a square frame, which forms a sealed structure with the top cover and the bottom plate, and a fixing frame is installed inside the square frame.

[0011] Furthermore, the fixed frame is equipped with battery cells, and the fixed frame is composed of a heat dissipation plate. The fixed frame has wiring holes on its side, and the heat dissipation plate has corresponding reserved holes inside. The reserved holes do not interfere with the heat dissipation pipes installed inside the heat dissipation plate.

[0012] Furthermore, the fixed frame is provided with an extension sleeve on the side away from the main heat sink. The fixed frame is fitted with the top cover and the main heat sink to form an airtight environment. The inside of the fixed frame is provided with an extension sleeve at the end away from the main heat sink. The inner side of the extension sleeve forms a hollow structure at the end of the fixed frame away from the main heat sink.

[0013] Furthermore, a bellows is fixedly connected inside the extension sleeve, which completely covers the hollowed-out end of the fixed frame. A sealing plate is fixedly connected to the side of the bellows away from the fixed frame, and a pressure sensor is fixedly connected in the middle of the sealing plate, with the pressure sensor abutting against the inner side of the outer shell.

[0014] Furthermore, the main heat sink, the branch heat sink, and the connecting pipe form a square frame with a sealing groove at the top, and the bottom of the top cover has a sealing ring corresponding to the sealing groove, and the sealing ring forms a sealing structure at the top of the square frame.

[0015] Furthermore, the bottom plate has a mounting groove on its side, and the top cover has a connector strip that matches the mounting groove on its side. The connector strip is inserted into the mounting groove to form a seal, and the top cover and the bottom plate are fixed together with bolts to form a shell.

[0016] Furthermore, both the base plate and the top cover are provided with heat dissipation fins on their outer sides, and both the base plate and the top cover are provided with heat dissipation pipes inside. Both ends of the heat dissipation pipes are provided with self-locking quick connectors, and the self-locking quick connectors are connected with the mating connectors to form a seal. Both ends of the base plate are provided with mounting protrusions, and the mounting protrusions are provided with through holes in the middle. The water circulation connector extends outward from the through holes. Both ends of the bottom of the top cover are provided with reserved grooves aligned with the mounting protrusions.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This is a thermal management device for new energy power battery packs. It forms a continuous flow channel network through a main heat sink, branch heat sinks and internally connected heat sink pipes. The coolant is forced to circulate in a closed loop. It is connected to the vehicle's liquid cooling components through a water circulation connector. The coolant diffuses from the main heat sink to the branch heat sinks on both sides and then returns through the connecting pipes, forming a directional flow. This structure uses honeycomb-shaped heat sink pipes to increase the heat exchange area, thereby efficiently removing the heat generated by the battery cells, significantly improving heat dissipation efficiency, and preventing the battery pack from degrading due to overheating.

[0018] The heat sinks are interconnected by connecting pipes, allowing the coolant to circulate in the flow channel network. Heat is conducted from the battery cell to the heat sink, and thermal balance is achieved through the uniform diffusion of the cooling medium, preventing local overheating, ensuring consistent temperature throughout the battery pack, and improving battery life and safety.

[0019] The coolant is distributed to the bottom plate and the inside of the top cover through the connector on the water circulation joint, forming a multi-path cooling system. The coolant flows on both the inside and outside of the outer shell at the same time, absorbing surface heat and synchronizing with the flow channel of the main heat sink, thus enhancing the overall thermal management effect.

[0020] The fixed frame is made of a heat spreader plate, which fits with the top cover and the main heat sink plate to form an airtight environment. The bellows inside the extension sleeve can expand and contract to adapt to pressure fluctuations. The pressure sensor detects the internal pressure in real time to ensure the system's sealing and safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is a schematic diagram of the heat sink structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the heat sink of the present invention; Figure 5For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the fixed frame structure of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the top cover of the present invention; Figure 9 This is a schematic diagram of the base plate structure of the present invention; Figure 10 This is a schematic diagram of the top cover structure of the present invention.

[0022] In the diagram: 1. Base plate; 2. Top cover; 3. Main heat sink; 4. Support heat sink; 5. Connecting pipe; 6. Heat dissipation pipe; 7. Water circulation connector; 8. Connecting joint; 9. Fixing frame; 10. Wiring hole; 11. Reserved hole; 12. Extension sleeve; 13. Corrugated pipe; 14. Sealing plate; 15. Pressure sensor; 16. Sealing groove; 17. Sealing ring; 18. Mounting groove; 19. Connecting strip; 20. Self-locking quick connector; 21. Heat dissipation fins; 22. Heat spreader; 23. Mounting protrusion; 24. Through hole; 25. Reserved groove. Detailed Implementation

[0023] 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.

[0024] Example 1: Please refer to Figures 1 to 6 The present invention provides the following technical solution: A thermal management device for a new energy power battery pack includes a base plate 1 and a top cover 2, which are spliced ​​together to form a battery pack shell. A thermal management component is installed inside the battery pack casing. The thermal management component includes a main heat sink 3 fixedly connected to the middle of the base plate 1. Both sides of the main heat sink 3 are fixedly connected to equally spaced branch heat sinks 4. The main heat sink 3 has honeycomb-shaped heat sink pipes 6 inside, and the branch heat sinks 4 also have heat sink pipes 6 inside. The heat sink pipes 6 inside the branch heat sinks 4 are connected to the heat sink pipes 6 inside the main heat sink 3. The end of the branch heat sink 4 away from the main heat sink 3 is connected through a connecting pipe 5. The heat sink pipes 6 inside the branch heat sink 4 are interconnected through the connecting pipe 5.

[0025] Both ends of the main heat sink 3 are equipped with water circulation connectors 7, and both ends of the water circulation connectors 7 extend to the outer sides of both ends of the base plate 1. The water circulation connectors 7 are connected to the liquid cooling components inside the vehicle, and the water circulation connectors 7 are connected to the cooling pipes 6 inside the main heat sink 3 and the branch heat sink 4.

[0026] The water circulation connector 7 has a connecting joint 8 in the middle of both the upper and lower sides, and the water circulation connector 7 is connected to the water passage inside the bottom plate 1 and the top cover 2 through the connecting joints 8 at its upper and lower ends.

[0027] When the new energy power battery pack is working, the cells generate heat, which is transferred to the thermal management components inside the battery pack shell formed by splicing the bottom plate 1 and the top cover 2. The end of the heat sink 4 away from the main heat sink 3 is connected by a connecting pipe 5, so that the heat sink pipes 6 inside the heat sink 4 are interconnected through the connecting pipe 5, forming a continuous flow channel network. After the heat is conducted from the cells to the main heat sink 3 and the heat sink 4, it is transferred to the cooling medium inside the flow channel through the wall of the heat sink pipe 6.

[0028] The cooling medium flows in the heat dissipation pipe 6, absorbs heat, and circulates between the branch heat dissipation plates 4 through the connecting pipe 5, so as to achieve uniform distribution and dissipation of heat. The flow process of the cooling medium involves diffusion from the main heat dissipation plate 3 to the branch heat dissipation plates 4 on both sides, and then returning through the connecting pipe 5 to form a closed loop, thereby enhancing the heat dissipation efficiency.

[0029] Heat is conducted through the main radiator 3 and the branch radiator 4 to the coolant in the radiator pipe 6. The coolant flows from the vehicle's liquid cooling system into the water circulation connector 7 and enters the radiator pipe 6 inside the main radiator 3. The coolant disperses and flows in the honeycomb flow channel of the main radiator 3. After absorbing heat, it flows to the radiator pipe 6 inside the branch radiator 4 on both sides. The coolant continues to absorb heat in the branch radiator 4 and circulates at the end of the branch radiator 4 through the connecting pipe 5. Finally, it returns to the main radiator 3 and flows out to the vehicle's liquid cooling system through the water circulation connector 7 to complete the heat exchange. The flow of coolant is driven by an external pump to form a forced circulation. The mechanical movement is manifested as the continuous directional flow of coolant in the flow channel, thereby efficiently removing heat.

[0030] The water circulation connector 7 is provided with connectors 8 on both the upper and lower sides. The water circulation connector 7 is connected to the water channels inside the bottom plate 1 and the top cover 2 through the connectors 8. When the coolant flows in from the water circulation connector 7, part of the coolant is diverted through the connectors 8 into the water channels inside the bottom plate 1 and the top cover 2. The coolant flows in the water channels of the bottom plate 1 and the top cover 2, absorbing the heat from the surface of the outer shell. At the same time, the coolant inside the main heat dissipation plate 3 and the auxiliary heat dissipation plate 4 continues to circulate. The diversion effect of the connectors 8 allows the coolant to cool both the inside and outside of the outer shell at the same time, enhancing the overall heat dissipation effect. The coolant forms a multi-path flow through the diversion and merging of the connectors 8. The flow of the coolant in the water channels of the bottom plate 1 and the top cover 2 is synchronized with the flow channel of the main heat dissipation plate 3, achieving uniform thermal management.

[0031] Example 2: Based on Example 1, please refer to... Figure 7 The following structure was also disclosed: The main heat sink 3, the auxiliary heat sink 4, and the connecting pipe 5 form a square frame. This square frame forms a sealed structure with the top cover 2 and the bottom plate 1, and a fixing frame 9 is installed inside the square frame.

[0032] Furthermore, the fixed frame 9 is equipped with a battery cell, and the fixed frame 9 is made of a heat dissipation plate. The fixed frame 9 has wiring holes 10 on its side, and the heat dissipation plate 4 has corresponding reserved holes 11 inside. The reserved holes 11 and the heat dissipation pipes 6 installed inside the heat dissipation plate 4 do not interfere with each other.

[0033] Furthermore, an extension sleeve 12 is provided on the side of the fixing frame 9 away from the main heat sink 3. The fixing frame 9 is fitted with the top cover 2 and the main heat sink 3 to form an airtight environment. An extension sleeve 12 is provided inside the end of the fixing frame 9 away from the main heat sink 3. The inner side of the extension sleeve 12 forms a hollow structure at the end of the fixing frame 9 away from the main heat sink 3.

[0034] Furthermore, a bellows 13 is fixedly connected inside the extension sleeve 12. The bellows 13 completely covers the hollow at the end of the fixed frame 9. A sealing plate 14 is fixedly connected to the side of the bellows 13 away from the fixed frame 9. A pressure sensor 15 is fixedly connected in the middle of the sealing plate 14, and the pressure sensor 15 abuts against the inside of the outer shell.

[0035] When the battery pack is working, heat is transferred from the cells to the fixed frame 9. The fixed frame 9 is composed of a heat spreader, which can quickly conduct heat to the surrounding heat dissipation components. The main heat dissipation plate 3 and the auxiliary heat dissipation plate 4 are in contact with the fixed frame 9. Heat is conducted to the main heat dissipation plate 3 and the auxiliary heat dissipation plate 4 through the fixed frame 9, and then dissipated through the cooling medium in the heat dissipation pipe 6. The sealed structure prevents the cooling medium from leaking, ensuring thermal management efficiency. Heat diffuses to the surroundings through the heat spreader effect of the fixed frame 9. The cooling medium flows in the sealed flow channel without external interference.

[0036] The wiring hole 10 and the reserved hole 11 allow the battery cable to pass through without affecting the flow channel of the heat pipe 6. The coolant flows in the heat pipe 6 and absorbs heat. The mechanical movement is manifested as heat spreading from the cell through the thermally conductive material of the fixing frame 9. The coolant flow channel is isolated from the cable path.

[0037] When the battery pack is working, heat is transferred from the cells to the mounting frame 9. The hollow structure of the extension sleeve 12 increases the heat dissipation area and allows heat to be transferred to the surrounding space more efficiently. The fit between the mounting frame 9 and the top cover 2 and the main heat dissipation plate 3 ensures a seal and prevents heat loss. The mechanical movement is manifested as heat being dissipated by convection through the hollow part of the extension sleeve 12. The coolant flows in the channel to jointly manage the heat.

[0038] A bellows 13 is fixedly connected inside the extension sleeve 12. The bellows 13 completely covers the hollow at the end of the fixed frame 9. A sealing plate 14 is fixedly connected to the side of the bellows 13 away from the fixed frame 9. A pressure sensor 15 is fixedly connected in the middle of the sealing plate 14 and abuts against the inside of the outer shell. When the battery pack is working, heat causes changes in internal pressure. The bellows 13 can expand and contract to adapt to pressure fluctuations and maintain a seal. The pressure sensor 15 detects the internal pressure to ensure safety.

[0039] Example 3: Based on Examples 1 and 2, please refer to... Figures 8 to 10 The following structure was also disclosed: The main heat sink 3, the auxiliary heat sink 4 and the connecting pipe 5 form a square frame with a sealing groove 16 at the top. The bottom of the top cover 2 is provided with a sealing ring 17 corresponding to the sealing groove 16, and the sealing ring 17 forms a sealing structure at the top of the square frame.

[0040] The bottom plate 1 has a mounting groove 18 on one side, and the top cover 2 has a plug strip 19 that matches the mounting groove 18 on one side. The plug strip 19 is inserted into the mounting groove 18 to form a seal, and the top cover 2 and the bottom plate 1 are fixed together by bolts to form a shell.

[0041] Both the base plate 1 and the top cover 2 have heat dissipation fins 21 on their outer sides. Both the base plate 1 and the top cover 2 have heat dissipation pipes 22 inside. Both ends of the heat dissipation pipes 22 have self-locking quick connectors 20, which are connected to the connectors 8 to form a seal. Both ends of the base plate 1 have mounting protrusions 23, and the mounting protrusions 23 have through holes 24 in the middle. The water circulation connector 7 extends outward from the through holes 24. Both ends of the bottom of the top cover 2 have reserved grooves 25 that are aligned with the mounting protrusions 23. When the top cover 2 is spliced ​​with the bottom plate 1, the sealing ring 17 is embedded in the sealing groove 16 to form a tight seal. When the battery pack is working, the heat is dissipated through the heat dissipation component. When the casing is assembled, the plug strip 19 is inserted into the mounting groove 18 to achieve initial positioning and sealing, and then it is tightened with bolts. When the battery pack is working, the heat is dissipated through the casing. The plug structure ensures the integrity and airtightness of the casing. The plug strip 19 is inserted into the mounting groove 18, and the linear movement when the bolts are tightened ensures the stability of the casing.

[0042] The base plate 1 has mounting protrusions 23 at both ends, and a through hole 24 in the middle of the mounting protrusions 23. The water circulation connector 7 extends outward through the through hole 24. The bottom of the top cover 2 has reserved grooves 25 at both ends that are aligned with the mounting protrusions 23. When the battery pack is working, the heat is dissipated through the internal coolant circulation. At the same time, the heat dissipation pipe 22 uses the phase change principle to quickly conduct heat to the heat dissipation fins 21. The heat dissipation fins 21 increase the heat dissipation area and enhance air convection. The self-locking quick connector 20 connects with the connector 8 to ensure a seal and facilitate disassembly. The mechanical movement is manifested as the phase change flow of the working fluid inside the heat dissipation pipe 22 and the air convection movement on the surface of the heat dissipation fins 21, which together improve the heat dissipation performance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thermal management device for a new energy power battery pack, comprising a base plate (1) and a top cover (2), wherein the base plate (1) and the top cover (2) are spliced ​​together to form a battery pack shell; Its features are: The battery pack housing is equipped with a thermal management component. The thermal management component includes a main heat sink (3) fixedly connected to the middle of the base plate (1). Both sides of the main heat sink (3) are fixedly connected with equally spaced branch heat sinks (4). The main heat sink (3) is provided with heat sink pipes (6) arranged in a honeycomb pattern. The branch heat sinks (4) are also provided with heat sink pipes (6). The heat sink pipes (6) inside the branch heat sinks (4) are connected to the heat sink pipes (6) inside the main heat sink (3). The end of the branch heat sink (4) away from the main heat sink (3) is connected through a connecting pipe (5). The heat sink pipes (6) inside the branch heat sinks (4) are connected to each other through the connecting pipe (5).

2. The thermal management device for a new energy power battery pack according to claim 1, characterized in that: Both ends of the main heat sink (3) are provided with water circulation connectors (7), and both ends of the water circulation connectors (7) extend to the outer sides of both ends of the base plate (1). The water circulation connectors (7) are connected to the liquid cooling components inside the vehicle, and the water circulation connectors (7) are connected to the heat dissipation pipes (6) inside the main heat sink (3) and the branch heat sink (4).

3. The thermal management device for a new energy power battery pack according to claim 2, characterized in that: The water circulation connector (7) has a connecting joint (8) in the middle of both the upper and lower sides, and the water circulation connector (7) is connected to the water passage inside the bottom plate (1) and the top cover (2) through the connecting joints (8) at its upper and lower ends.

4. The thermal management device for a new energy power battery pack according to claim 1, characterized in that: The main heat sink (3), the branch heat sink (4) and the connecting pipe (5) form a square frame, which forms a sealed structure with the top cover (2) and the bottom plate (1), and a fixing frame (9) is installed inside the square frame.

5. A thermal management device for a new energy power battery pack according to claim 4, characterized in that: The fixed frame (9) is equipped with a battery cell and is made of a heat spreader plate. The fixed frame (9) has wiring holes (10) on its side and a corresponding reserved hole (11) inside the heat sink (4). The reserved hole (11) and the heat sink pipe (6) inside the heat sink (4) do not interfere with each other.

6. A thermal management device for a new energy power battery pack according to claim 5, characterized in that: The fixed frame (9) is provided with an extension sleeve (12) on the side away from the main heat sink (3). The fixed frame (9) is fitted with the top cover (2) and the main heat sink (3) to form an airtight environment. The fixed frame (9) is provided with an extension sleeve (12) inside the end away from the main heat sink (3). The inner side of the extension sleeve (12) forms a hollow structure at the end of the fixed frame (9) away from the main heat sink (3).

7. A thermal management device for a new energy power battery pack according to claim 6, characterized in that: The extension sleeve (12) is fixedly connected to a bellows (13), which completely covers the hollow at the end of the fixed frame (9). A sealing plate (14) is fixedly connected to the side of the bellows (13) away from the fixed frame (9). A pressure sensor (15) is fixedly connected in the middle of the sealing plate (14), and the pressure sensor (15) abuts against the inside of the outer shell.

8. A thermal management device for a new energy power battery pack according to claim 7, characterized in that: The main heat sink (3), the branch heat sink (4) and the connecting pipe (5) form a square frame with a sealing groove (16) at the top. The bottom of the top cover (2) is provided with a sealing ring (17) that corresponds one-to-one with the sealing groove (16), and the sealing ring (17) forms a sealing structure at the top of the square frame.

9. A thermal management device for a new energy power battery pack according to claim 1, characterized in that: The bottom plate (1) has an installation groove (18) on its side, and the top cover (2) has a plug strip (19) that matches the installation groove (18) on its side. The plug strip (19) is inserted into the installation groove (18) to form a seal, and the top cover (2) and the bottom plate (1) are fixed together by bolts to form a shell.

10. A thermal management device for a new energy power battery pack according to claim 9, characterized in that: The base plate (1) and the top cover (2) are provided with heat dissipation fins (21) on the outside. The base plate (1) and the top cover (2) are provided with heat dissipation pipes (22) inside. The heat dissipation pipes (22) are provided with self-locking quick connectors (20) at both ends. The self-locking quick connectors (20) and the butt connectors (8) are connected to form a seal. The base plate (1) is provided with mounting protrusions (23) at both ends. The mounting protrusions (23) are provided with through holes (24) in the middle. The water circulation connector (7) extends outward from the through holes (24). The bottom of the top cover (2) is provided with reserved grooves (25) aligned with the mounting protrusions (23) at both ends.

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