A battery pack structure facilitating heat dissipation of a lithium battery of an automobile

Abstract

The application discloses a kind of battery pack structures of automobile lithium battery convenient for heat dissipation, it is related to automobile lithium battery heat dissipation technical field, including battery pack mounting seat, the upper portion of battery pack mounting seat is equidistantly provided with several lithium battery modules, several The lithium battery module is provided with horizontal air guide groove between front and back sides, the left and right sides of battery pack mounting seat are provided with air cooling unit, the inside of battery pack mounting seat is equidistantly provided with several horizontal water cooling pipes and serpentine water cooling pipe, the bottom of serpentine water cooling pipe is provided with radiating plate.The application circulates coolant by horizontal water cooling pipe, serpentine water cooling pipe is connected, and cold quantity is transmitted to radiating plate, while air cooling unit generates airflow, one way enters horizontal air guide groove and radiates fin and lithium battery module side surface, another way enters horizontal air inlet groove and radiates radiating plate and serpentine water cooling pipe, hot air is quickly discharged by air outlet hole, so that water cooling is responsible for core heat rapid conduction, air cooling is responsible for strengthening heat dissipation and auxiliary cooling.

Description

Technical Field

[0001] This invention relates to the field of automotive lithium battery heat dissipation technology, and in particular to a battery pack structure that facilitates heat dissipation for automotive lithium batteries. Background Technology

[0002] With the rapid development of the new energy vehicle industry, automotive lithium batteries, as the core power components of new energy vehicles, are subject to heat dissipation performance in terms of their operational stability and service life. Automotive lithium battery heat dissipation technology has always been one of the key research focuses in the industry. The mainstream heat dissipation methods are mainly divided into two categories: forced air cooling and liquid cooling. Among them, air cooling relies on airflow to remove heat, which is simple in structure and low in cost; liquid cooling achieves efficient heat conduction through coolant circulation and has a faster heat dissipation rate. Both are widely used in the heat dissipation systems of various power battery packs.

[0003] However, existing single air-cooling or single water-cooling heat dissipation structures have obvious drawbacks. Battery packs using pure air cooling have low heat transfer efficiency and cannot quickly dissipate core heat under high-power charging and discharging conditions, which can easily lead to problems such as local overheating and uneven heat dissipation. Moreover, the heat dissipation effect is easily affected by the ambient temperature. Battery packs using water cooling have higher thermal conductivity, but the contact area between the water cooling pipes and the modules is limited, resulting in high thermal resistance. At the same time, the temperature of the coolant itself is prone to rise. If it cannot be cooled down in time, the heat dissipation effect will continue to decline. In addition, the pipe layout is complex, occupies a lot of space, and is difficult to assemble and maintain, making it difficult to meet the requirements of new energy vehicles for efficient, uniform, and stable heat dissipation of lithium batteries. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a battery pack structure for facilitating heat dissipation of automotive lithium batteries, comprising a battery pack mounting base, wherein a plurality of lithium battery modules are equidistantly arranged on the upper part of the battery pack mounting base, and transverse air guide slots are provided between the front and rear sides of the plurality of lithium battery modules. Air-cooling units are provided on the left and right sides of the battery pack mounting base, and a plurality of transverse water-cooling pipes are equidistantly arranged inside the battery pack mounting base. A serpentine water-cooling pipe is provided on the upper part of each lithium battery module, and a heat dissipation plate is provided at the bottom of the serpentine water-cooling pipe. A mounting plate is provided on the front and rear sides of the heat dissipation plate. Connectors are provided at the left and right ends of each transverse water-cooling pipe. One end of the serpentine water-cooling pipe is connected to the right end of the second transverse water-cooling pipe from the front, and the other end of the serpentine water-cooling pipe is connected to the left end of the second transverse water-cooling pipe from the back. Several of the aforementioned transverse air guide slots are used for the installation of several of the aforementioned lithium battery modules, and also for the air intake of the air-cooling unit; The air-cooling unit is used to generate cooling air, which flows into the horizontal air guide groove and heat sink plate to further cool the lithium battery module, while also cooling the water flowing in the horizontal water cooling pipe and the serpentine water cooling pipe. The heat sink is used to contact the lithium battery module and transfer the heat dissipation effect of the serpentine water cooling pipe to the upper part of the lithium battery module. The mounting plate is used to support the serpentine water-cooling pipe and to fix the heat dissipation plate.

[0005] Preferably, the bottom of the battery pack mounting base is provided with a plurality of slots at equal intervals, the plurality of slots are arranged at equal intervals along the direction of the transverse water cooling pipe, a plurality of heat dissipation fins are provided at equal intervals on the outer side of the transverse water cooling pipe, a mounting hole is provided in the middle of the plurality of heat dissipation fins for mounting on the outer side of the transverse water cooling pipe, a heat-conducting side plate is provided on the front and rear sides of the plurality of heat dissipation fins, the heat-conducting side plate is attached to the side of the lithium battery module on the front and rear sides, and the bottom of the heat dissipation fins is inserted into the inner side of the slots for engagement.

[0006] Preferably, the heat sink has several horizontal air inlet slots equidistantly arranged on its inner side, and several contact pieces equidistantly arranged on the bottom of the heat sink. The bottom of the contact pieces is attached to the upper part of the lithium battery module. The bottom of the heat sink also has several air outlet holes. The contact pieces and air outlet holes are arranged equidistantly along the horizontal air guide slots, and the air outlet holes are all connected to the corresponding contact pieces. The heat sink is provided with fixing lugs at each of its four corners for fixing to the battery pack mounting base with bolts.

[0007] Preferably, the air-cooling unit includes a drive motor, and motor slots are provided at the four corners of the battery pack mounting base. The drive motors are fixedly connected to the inner side of the corresponding motor slots. A first gear is fixedly connected to the upper part of each drive motor. A transmission chain is connected to the outer side of the first gear on the front and rear sides. A plurality of second gears are equidistantly arranged in the middle of the transmission chain. A rotating rod is fixedly connected to the middle of the second gears. A cooling fan is provided at the bottom end of each rotating rod.

[0008] Preferably, each of the transmission chains has a fixing plate at its bottom, and the fixing plates are respectively fixedly connected to the inner left and right ends of the battery pack mounting base. Each fixing plate has a rotating bearing fixedly connected to its upper part, and the cooling fan is rotatably connected to the inner side of the corresponding rotating bearing.

[0009] Preferably, the upper part of the heat sink and the mounting plate are provided with an embedding groove. The cross-section of the embedding groove is an arc-shaped groove that matches the outer wall of the serpentine water cooling pipe. The inner wall of the embedding groove is provided with a thermally conductive silicone layer. The serpentine water cooling pipe is tightly fitted into the inner side of the embedding groove and fixed by thermally conductive adhesive, so that the serpentine water cooling pipe forms a surface contact with the heat sink and the mounting plate for heat conduction.

[0010] Preferably, the upper end of the battery pack mounting base is provided with a retaining plate, the bottom of the retaining plate is provided with a retaining ring, the upper part of the battery pack mounting base is provided with a retaining groove, and the bottom end of the retaining plate and the left and right sides of the upper end of the battery pack mounting base are provided with a plurality of semi-circular retaining grooves. Both ends of the transverse water cooling pipe are engaged and connected to the inner side of the corresponding semi-circular retaining groove, and the retaining ring is engaged with the retaining groove. The front and rear ends of the battery pack mounting base are provided with mounting grooves, and the outer side of the mounting plate is provided with a fixing side plate. The fixing side plate passes through the mounting groove and is fixedly connected to the battery pack mounting base by bolts.

[0011] Preferably, the upper left and right sides of the battery pack mounting base are fixedly connected to support frames by bolts. Each support frame has several semi-circular support grooves on its upper part. The semi-circular support grooves are engaged with the bottom outer side of the connector to support the connector.

[0012] In summary, the present invention provides a battery pack structure that facilitates heat dissipation for automotive lithium batteries, and has the following beneficial effects: 1. This invention uses a closed-loop water-cooling system consisting of horizontal water-cooling pipes, serpentine water-cooling pipes, and a heat sink to form a forced air-cooling channel for bidirectional heat dissipation, in conjunction with an air-cooling unit, horizontal air guide channels, horizontal air inlets, and air outlets. Coolant circulates through the connectors into the horizontal water-cooling pipes, and the serpentine water-cooling pipes are connected to evenly transfer the cooling energy to the heat sink. The coolant then acts directly on the upper part of the lithium battery module through contact plates, eliminating the top heat dissipation blind spot. At the same time, the air-cooling unit generates airflow, one path of which enters the horizontal air guide channels to dissipate heat from the heat sink fins and the sides of the lithium battery module, and the other path enters the horizontal air inlets to cool the heat sink and the serpentine water-cooling pipes. Hot air is quickly discharged through the air outlets, allowing water cooling to quickly conduct core heat, while air cooling enhances heat dissipation and provides auxiliary cooling, significantly improving the heat dissipation rate and temperature uniformity, avoiding local overheating, significantly extending the lifespan of the lithium battery, and preventing uneven heat dissipation, low efficiency, and high-temperature degradation in the battery pack.

[0013] 2. This invention adopts an integrated structural design, combining installation positioning, heat conduction and dissipation, airflow guidance, and support and fixation functions into one, significantly reducing the number of parts and assembly complexity. The horizontal air guide channel simultaneously realizes the installation positioning of the lithium battery module and the airflow guidance function; the mounting plate also serves as the support for the serpentine water-cooling pipe and the fixation of the heat sink; the heat sink fins are fitted onto the horizontal water-cooling pipe through the mounting holes, and the bottom is quickly positioned by snapping into the slot; the heat-conducting side plate directly adheres to the lithium battery module to achieve efficient heat conduction; the clamping plate and the semi-circular clamping groove cooperate to realize the boltless quick clamping of the horizontal water-cooling pipe, and the clamping ring and clamping groove are locked to prevent loosening; the support frame and the semi-circular support groove stably support the connector, disperse the pipeline stress, make the internal space layout of the battery pack more compact, significantly improve the assembly efficiency, and greatly enhance the overall vibration resistance, sealing and structural strength, making it suitable for the complex driving conditions of automobiles.

[0014] 3. The air-cooling unit of this invention uses a drive motor, a first gear, a transmission chain, and a second gear to synchronously drive multiple sets of cooling fans. The drive motor is installed in a motor slot, saving space and ensuring a stable fixation. Power is transmitted through the first gear to the transmission chain, driving multiple sets of second gears to rotate synchronously, ensuring that all cooling fans rotate at the same speed and that airflow is uniform, avoiding uneven airflow that could lead to inconsistent heat dissipation. With the support of a fixed plate and rotating bearings, the cooling fans have low rotational resistance, low noise, and smooth operation, allowing for long-term stable operation. This structure reduces the number of motors used, lowers energy consumption and potential failure points, and improves the overall reliability of the air-cooling system. It also ensures stable airflow into the horizontal air guide and intake slots, maximizing the auxiliary cooling effect of air cooling and keeping the water-cooling system in a continuously efficient operating state.

[0015] This invention achieves large-area surface contact heat conduction through embedded grooves, a thermally conductive silicone layer, and contact pads. Combined with directional ventilation channels, it significantly improves heat transfer efficiency. A serpentine water-cooling pipe is fitted into an arc-shaped embedded groove, with the thermally conductive silicone layer filling the gaps on the inner wall, forming a full-contact surface for heat conduction with the heat sink and mounting plate. This greatly reduces thermal resistance and improves cold air transfer efficiency. The contact pads at the bottom of the heat sink are evenly attached to the upper part of the lithium battery module, ensuring uniform heat conduction without dead zones. Simultaneously, the horizontal air guide grooves and horizontal air inlet grooves form a directional ventilation channel, allowing airflow to circulate efficiently along a fixed path, directly carrying away heat from the heat sink fins, heat sink, and the surface of the lithium battery module. Hot air is then directionally discharged through the exhaust holes, preventing hot air backflow. The combination of surface contact heat conduction and directional ventilation ensures uniform heat dissipation from all directions of the lithium battery module, completely eliminating localized hot spots, ensuring consistent battery operating temperature, improving charge / discharge performance and cycle life, and enhancing battery pack safety. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a battery pack structure for facilitating heat dissipation in automotive lithium batteries according to the present invention; Figure 2This is a three-dimensional structural diagram of a battery pack mounting base and a lithium battery module that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 3 This is a schematic diagram of the disassembled structure of a battery pack mounting base for facilitating heat dissipation in automotive lithium batteries, according to the present invention. Figure 4 This is a schematic diagram of a horizontal water-cooling pipe and a serpentine water-cooling pipe structure for a battery pack that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 5 This is a schematic diagram of a serpentine water-cooling pipe, heat dissipation plate, and mounting plate structure for a battery pack structure that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 6 This is a schematic diagram of the bottom structure of a heat sink plate for a battery pack structure that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 7 This is a schematic diagram of a battery pack mounting base, horizontal water cooling pipe, serpentine water cooling pipe and heat dissipation fin structure for a battery pack structure that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 8 This is a schematic diagram of an air-cooled unit structure for a battery pack structure that facilitates heat dissipation of automotive lithium batteries according to the present invention; Figure 9 This is a schematic diagram of a battery pack mounting base structure that facilitates heat dissipation of automotive lithium batteries according to the present invention. Figure 10 This is a schematic diagram of a heat dissipation fin structure for a battery pack structure that facilitates heat dissipation of automotive lithium batteries according to the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Battery pack mounting bracket; 101. Slot; 102. Motor slot; 103. Clamping plate; 104. Clamping ring; 105. Clamping groove; 106. Semi-circular clamping groove; 107. Mounting groove; 2. Lithium battery module; 3. Horizontal air guide duct; 4. Horizontal water cooling pipe; 401. Connector; 5. Serpentine water cooling pipe; 6. Heat sink; 601. Horizontal air inlet duct; 602. Fixing side lug; 603. Contact piece; 604. Air outlet 7. Hole; 8. Mounting plate; 9. Fixed side plate; 10. Air-cooled unit; 11. Drive motor; 12. First gear; 13. Transmission chain; 14. Second gear; 15. Rotating rod; 16. Cooling fan; 17. Fixing plate; 18. Rotating bearing; 19. Support frame; 10. Semi-circular support groove; 11. Embedded groove; 12. Heat dissipation fins; 13. Mounting hole; 14. Heat-conducting side plate. Detailed Implementation

[0018] 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.

[0019] Example: Please see Figures 1-8 As shown, the present invention provides a technical solution: a battery pack structure for facilitating heat dissipation of automotive lithium batteries, including a battery pack mounting base 1, a plurality of lithium battery modules 2 are equidistantly arranged on the upper part of the battery pack mounting base 1, a transverse air guide groove 3 is provided between the front and rear sides of the plurality of lithium battery modules 2, an air cooling unit 8 is provided on the left and right sides of the battery pack mounting base 1, a plurality of transverse water cooling pipes 4 are equidistantly arranged inside the battery pack mounting base 1, a serpentine water cooling pipe 5 is provided on the upper part of the lithium battery modules 2, a heat dissipation plate 6 is provided at the bottom of the serpentine water cooling pipe 5, a mounting plate 7 is provided on the front and rear sides of the heat dissipation plate 6, a connector 401 is provided at the left and right ends of the transverse water cooling pipes 4, one end of the serpentine water cooling pipe 5 is connected to the right end of the second transverse water cooling pipe 4 from the front, and the other end of the serpentine water cooling pipe 5 is connected to the left end of the second transverse water cooling pipe 4 from the back. Several horizontal air guide slots 3 are used for the installation of several lithium battery modules 2, and at the same time for the air intake of the air-cooling unit 8. The installation and positioning of the lithium battery module 2 and the air-cooling duct function are integrated into the horizontal air guide slots 3, eliminating the need for independent air duct components, optimizing the internal space layout of the battery pack, improving airflow guidance, and ensuring smooth and efficient air delivery of the air-cooling unit 8. The air-cooling unit 8 is used to generate heat dissipation air. The generated heat dissipation air enters the horizontal air guide slot 3 and heat dissipation plate 6 for circulation. While further dissipating heat from the lithium battery module 2, it also dissipates heat from the water flowing in the horizontal water cooling pipe 4 and the serpentine water cooling pipe 5, thus constructing a heat dissipation mechanism that links air cooling and water cooling. The airflow acts on the lithium battery module 2, the horizontal water cooling pipe 4 and the serpentine water cooling pipe 5 at the same time, reducing the temperature rise of the coolant and improving the overall heat dissipation stability and continuous heat dissipation capability. The heat sink 6 is used to contact the lithium battery module 2 and transfer the heat dissipation effect of the serpentine water cooling pipe 5 to the upper part of the lithium battery module 2. The heat sink 6 directly conducts the cold energy of the serpentine water cooling pipe 5 to the upper part of the lithium battery module 2, eliminating the top heat dissipation blind spot, achieving balanced heat dissipation from top to bottom, improving temperature consistency, and extending battery life. The mounting plate 7 is used to support the serpentine water-cooling pipe 5 and fix the heat sink 6. The mounting plate 7 has the dual functions of supporting the serpentine water-cooling pipe 5 and fixing the heat sink 6, which reduces the number of parts, simplifies the assembly process, and improves the overall structure and vibration resistance reliability.

[0020] The bottom of the battery pack mounting base 1 is provided with several slots 101 at equal intervals. The slots 101 are arranged at equal intervals along the direction of the transverse water cooling pipe 4. Several heat dissipation fins 11 are provided at equal intervals on the outer side of the transverse water cooling pipe 4. The middle of each heat dissipation fin 11 is provided with a mounting hole 1011 for mounting on the outer side of the transverse water cooling pipe 4. The front and rear sides of each heat dissipation fin 11 are provided with heat-conducting side plates 1012. The heat-conducting side plates 1012 are attached to the sides of the lithium battery module 2 on the front and rear sides. The bottom of each heat dissipation fin 11 is inserted into the inner side of the slot 101 and engaged. The heat dissipation fin 11 is sleeved on the transverse water cooling pipe 4 through the mounting hole 1011 and positioned by the bottom being engaged in the slot 101. The heat-conducting side plates 1012 are in close contact with the lithium battery module 2, which greatly improves the side heat conduction area and heat dissipation efficiency, and the assembly is stable and reliable.

[0021] The heat sink 6 has several horizontal air inlet slots 601 evenly spaced on its inner side, and several contact pieces 603 evenly spaced on its bottom. The bottom of the contact pieces 603 is attached to the upper part of the lithium battery module 2. The bottom of the heat sink 6 also has several air outlet holes 604. The contact pieces 603 and the air outlet holes 604 are evenly spaced along the horizontal air guide slots 3. The air outlet holes 604 are all connected to the corresponding contact pieces 603. The horizontal air inlet slots 601 introduce airflow to cool the heat sink 6. The heat is discharged through the contact pieces 603 and the air outlet holes 604. The air duct and the heat conduction structure are integrated to avoid local hot spots and improve the heat dissipation efficiency of the upper part. The heat sink 6 is provided with fixing lugs 602 at each of its four corners, which are used to fix it to the battery pack mounting base 1 by bolts. The heat sink 6 is bolted to the battery pack mounting base 1 by fixing lugs 602, which ensures that the contact piece 603 is in close contact with the lithium battery module 2, improves the reliability of heat conduction, and facilitates disassembly and maintenance.

[0022] The air-cooled unit 8 includes a drive motor 801. Motor slots 102 are provided at the four corners of the battery pack mounting base 1. The drive motors 801 are fixedly connected to the inner side of the corresponding motor slots 102. A first gear 802 is fixedly connected to the upper part of each drive motor 801. A transmission chain 803 is connected to the outer side of the first gear 802 on the front and rear sides. Several second gears 804 are equidistantly arranged in the middle of the transmission chain 803. A rotating rod 805 is fixedly connected to the middle of the second gear 804. A cooling fan 806 is provided at the bottom of each rotating rod 805. The drive motor 801 drives multiple sets of second gears 804 and cooling fans 806 synchronously through the first gear 802 and the transmission chain 803. The air volume is uniform and stable, reducing the number of motors and lowering energy consumption and failure probability.

[0023] The bottom of the transmission chain 803 is provided with a fixing plate 807. The fixing plate 807 is fixedly connected to the left and right ends of the inner side of the battery pack mounting base 1. The upper part of the fixing plate 807 is fixedly connected with a rotating bearing 808. The cooling fan 806 is rotatably connected to the inner side of the corresponding rotating bearing 808. The fixing plate 807 and the rotating bearing 808 support the rotation of the cooling fan 806, reduce rotational resistance and noise, improve the smoothness of operation, and extend the service life of the air-cooling unit 8.

[0024] Both the heat sink 6 and the mounting plate 7 have an embedded groove 10 on their upper part. The cross-section of the embedded groove 10 is an arc-shaped groove that matches the outer wall of the serpentine water cooling tube 5. The inner wall of the embedded groove 10 is provided with a thermally conductive silicone layer. The serpentine water cooling tube 5 is tightly fitted into the inner side of the embedded groove 10 and fixed by thermally conductive adhesive, so that the serpentine water cooling tube 5 forms a surface contact for heat conduction with the heat sink 6 and the mounting plate 7. The embedded groove 10 matches the arc shape of the serpentine water cooling tube 5. The thermally conductive silicone layer on the inner wall improves the heat conduction efficiency. The surface contact fit and bonding fixation prevent loosening and displacement, and ensure the stability of heat dissipation.

[0025] The upper end of the battery pack mounting base 1 is provided with a clamping plate 103, the bottom of the clamping plate 103 is provided with a clamping ring 104, the upper part of the battery pack mounting base 1 is provided with a clamping groove 105, and the bottom end of the clamping plate 103 and the left and right sides of the upper end of the battery pack mounting base 1 are provided with several semi-circular clamping grooves 106. Both ends of the transverse water cooling pipe 4 are clamped and connected to the inner side of the corresponding semi-circular clamping groove 106. The clamping ring 104 is clamped with the clamping groove 105. The clamping plate 103 and the semi-circular clamping groove 106 quickly clamp the transverse water cooling pipe 4. The clamping ring 104 and the clamping groove 105 are positioned and locked, eliminating the need for bolts, simplifying assembly, and ensuring accurate positioning. The front and rear ends of the battery pack mounting base 1 are provided with mounting grooves 107, and the outer side of the mounting plate 7 is provided with fixing side plates 701. The fixing side plates 701 pass through the mounting grooves 107 and are fixedly connected to the battery pack mounting base 1 by bolts. The fixing side plates 701 pass through the mounting grooves 107 and are locked to the battery pack mounting base 1, which improves the connection strength of the mounting plate 7 and ensures that the heat sink 6 and the serpentine water cooling pipe 5 are stable and reliable under vibration conditions.

[0026] The upper left and right sides of the battery pack mounting base 1 are fixedly connected to the support frame 9 by bolts. The upper part of the support frame 9 is provided with several semi-circular support grooves 901. The semi-circular support grooves 901 are all engaged with the bottom outer side of the connector 401 to support the connector 401. The support frame 9 and the semi-circular support grooves 901 support the connector 401 of the horizontal water cooling pipe 4, disperse the pipe stress, avoid loosening and leakage, and improve the sealing performance and service life of the water cooling system.

[0027] The implementation principle of this application embodiment is as follows: First, the coolant is introduced through the connectors 401 at both ends of the horizontal water cooling pipe 4 and circulates stably inside the pipe. Multiple heat dissipation fins 11 are fitted on the outside of the horizontal water cooling pipe 4. The heat dissipation fins 11 are tightly attached to the side of the lithium battery module 2 through the heat-conducting side plate 1012, which can quickly absorb the heat generated by the lithium battery module 2 when it is working and transfer the heat to the horizontal water cooling pipe 4. The coolant flowing inside the pipe continuously carries away the heat, thereby achieving efficient water cooling heat dissipation on the side of the lithium battery module 2. At the same time, the two ends of the serpentine water cooling pipe 5 are respectively connected to the corresponding horizontal water cooling pipe 4. The coolant flows from the horizontal water cooling pipe 4 into the serpentine water cooling pipe 5 and circulates. The serpentine water cooling pipe 5 is installed in the embedded groove 10 of the heat dissipation plate 6. The cold energy is efficiently transferred to the heat dissipation plate 6 through surface contact. The contact piece 603 at the bottom of the heat dissipation plate 6 is tightly attached to the upper surface of the lithium battery module 2, directly water cooling the upper part of the lithium battery module 2, and completing the full-area heat dissipation of the water cooling system. Then the air-cooling unit 8 starts, and the four corner drive motors 801 operate synchronously, driving the first gear 802 to rotate. Under the linkage of the transmission chain 803, multiple second gears 804 and rotating rod 805 rotate synchronously, thereby driving the cooling fan 806 to rotate at high speed and generate a stable and strong cooling airflow. The airflow is evenly blown towards the heat dissipation area inside the battery pack mounting base 1, providing continuous power for air-cooling. Secondly, a portion of the cooling airflow enters the transverse air guide channel 3 between the lithium battery modules 2 and flows through the transverse air guide channel 3. The airflow directly washes the surface of the heat dissipation fins 11, quickly removes the heat absorbed by the heat dissipation fins 11, reduces the temperature of the heat dissipation fins 11 and the transverse water cooling pipe 4, improves the heat dissipation efficiency of the water cooling system, and at the same time provides auxiliary air cooling to the side of the lithium battery module 2. In addition, another part of the heat dissipation airflow enters the horizontal air inlet slot 601 inside the heat sink 6, flows fully in the horizontal air inlet slot 601, absorbs the heat of the heat sink 6, contact plate 603 and serpentine water cooling pipe 5, and the heated airflow is finally discharged evenly from the air outlet 604 at the bottom of the heat sink 6, continuously providing forced air cooling to the heat sink 6 and serpentine water cooling pipe 5, and preventing the water cooling components from reducing the heat dissipation effect due to heat accumulation. Finally, the water cooling system composed of the horizontal water cooling pipe 4 and the serpentine water cooling pipe 5, together with the air cooling unit 8 and the air cooling system composed of the horizontal air guide slot 3, heat dissipation fins 11, horizontal air inlet slot 601 and air outlet 604, form a highly efficient linkage. The water cooling is responsible for the rapid conduction of core heat, while the air cooling is responsible for enhancing heat dissipation and assisting in cooling. The two modes work together and complement each other, and at the same time, they provide all-round and multi-angle heat dissipation for the side, top and internal heat dissipation components of the lithium battery module 2, which greatly improves the heat dissipation rate and heat dissipation uniformity of the lithium battery module 2, and ensures that the lithium battery module 2 maintains a stable and safe operating temperature under continuous working conditions.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 battery pack structure for facilitating heat dissipation of automotive lithium batteries, comprising a battery pack mounting base (1), characterized in that: The battery pack mounting base (1) has several lithium battery modules (2) arranged at equal intervals on its upper part. A horizontal air guide groove (3) is provided between the front and rear sides of the several lithium battery modules (2). A wind-cooling unit (8) is provided on the left and right sides of the battery pack mounting base (1). Several horizontal water-cooling pipes (4) are arranged at equal intervals inside the battery pack mounting base (1). A serpentine water-cooling pipe (5) is provided on the upper part of the lithium battery module (2). A heat dissipation plate (6) is provided at the bottom of the serpentine water-cooling pipe (5). A mounting plate (7) is provided on the front and rear sides of the heat dissipation plate (6). A connector (401) is provided at the left and right ends of the horizontal water-cooling pipe (4). One end of the serpentine water-cooling pipe (5) is connected to the right end of the second horizontal water-cooling pipe (4) from the front and the other end of the serpentine water-cooling pipe (5) is connected to the left end of the second horizontal water-cooling pipe (4) from the back. Several of the horizontal air guide slots (3) are used for the installation of several of the lithium battery modules (2) and for the air intake of the air-cooling unit (8); The air-cooling unit (8) is used to generate heat dissipation air. The generated heat dissipation air enters the horizontal air guide groove (3) and heat dissipation plate (6) for circulation, further dissipating heat from the lithium battery module (2) while allowing the water flowing in the horizontal water cooling pipe (4) and serpentine water cooling pipe (5) to dissipate heat. The heat sink (6) is used to contact the lithium battery module (2) and transfer the heat dissipation effect of the serpentine water cooling pipe (5) to the upper part of the lithium battery module (2). The mounting plate (7) is used to support the serpentine water cooling pipe (5) and fix the heat dissipation plate (6).

2. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The bottom of the battery pack mounting base (1) is provided with a number of slots (101) at equal intervals. The slots (101) are arranged at equal intervals along the direction of the transverse water cooling pipe (4). The outer side of the transverse water cooling pipe (4) is provided with a number of heat dissipation fins (11) at equal intervals. The middle of each heat dissipation fin (11) is provided with a mounting hole (1011) for mounting on the outer side of the transverse water cooling pipe (4). The front and rear sides of each heat dissipation fin (11) are provided with heat-conducting side plates (1012). The heat-conducting side plates (1012) are attached to the sides of the lithium battery module (2) on their front and rear sides. The bottom of each heat dissipation fin (11) is inserted into the inner side of the slot (101) and engaged.

3. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The heat sink (6) has several horizontal air inlet slots (601) evenly spaced on its inner side. The bottom of the heat sink (6) has several contact pieces (603) evenly spaced. The bottom of the contact pieces (603) is attached to the upper part of the lithium battery module (2). The bottom of the heat sink (6) also has several air outlet holes (604). The contact pieces (603) and the air outlet holes (604) are all arranged equidistantly along the horizontal air guide slots (3). The air outlet holes (604) are all connected to the corresponding contact pieces (603). The heat sink (6) is provided with fixing lugs (602) at each of its four corners, which are used to fix it to the battery pack mounting base (1) by bolts.

4. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The air-cooled unit (8) includes a drive motor (801). Motor slots (102) are provided at the four corners of the battery pack mounting base (1). The drive motors (801) are fixedly connected to the inner side of the corresponding motor slots (102). A first gear (802) is fixedly connected to the upper part of the drive motors (801). A transmission chain (803) is connected to the outer side of the first gears (802) on the front and rear sides. A plurality of second gears (804) are equidistantly arranged in the middle of the transmission chain (803). A rotating rod (805) is fixedly connected to the middle of the second gears (804). A cooling fan (806) is provided at the bottom end of the rotating rod (805).

5. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 4, characterized in that: The bottom of each transmission chain (803) is provided with a fixing plate (807), and the fixing plate (807) is fixedly connected to the left and right ends of the inner side of the battery pack mounting base (1). The upper part of each fixing plate (807) is fixedly connected with a rotating bearing (808), and the cooling fan (806) is rotatably connected to the inner side of the corresponding rotating bearing (808).

6. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The upper part of the heat sink (6) and the mounting plate (7) are provided with an embedded groove (10). The cross section of the embedded groove (10) is an arc-shaped groove that matches the outer wall of the serpentine water cooling pipe (5). The inner wall of the embedded groove (10) is provided with a thermally conductive silicone layer. The serpentine water cooling pipe (5) is tightly fitted into the inner side of the embedded groove (10) and fixed by thermally conductive adhesive, so that the serpentine water cooling pipe (5) forms a surface contact for heat conduction with the heat sink (6) and the mounting plate (7).

7. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The upper end of the battery pack mounting base (1) is provided with a retaining plate (103), the bottom of the retaining plate (103) is provided with a retaining ring (104), the upper part of the battery pack mounting base (1) is provided with a retaining groove (105), the bottom end of the retaining plate (103) and the left and right sides of the upper end of the battery pack mounting base (1) are provided with a number of semi-circular retaining grooves (106), the two ends of the transverse water cooling pipe (4) are engaged and connected to the inner side of the corresponding semi-circular retaining groove (106), and the retaining ring (104) is engaged with the retaining groove (105). The battery pack mounting base (1) is provided with mounting grooves (107) at both the front and rear ends. The outer side of the mounting plate (7) is provided with a fixing side plate (701). The fixing side plate (701) passes through the mounting groove (107) and is fixedly connected to the battery pack mounting base (1) by bolts.

8. The battery pack structure for facilitating heat dissipation of automotive lithium batteries according to claim 1, characterized in that: The upper left and right sides of the battery pack mounting base (1) are fixedly connected to the support frame (9) by bolts. The upper part of the support frame (9) is provided with several semi-circular support grooves (901). The semi-circular support grooves (901) are all engaged with the bottom outer side of the connector (401) to support the connector (401).

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