Mica insulation box of battery module for new energy automobile

Abstract

The invention discloses a mica insulation box of a battery module for a new energy automobile. The mica insulation box comprises a box body, and a mounting cavity and a heat exchange cavity are formed in the box body; the heat conduction shell is fixedly installed on the inner wall of the heat exchange cavity, and a heat exchange channel is reserved between the heat conduction shell and the inner wall of the heat exchange cavity; through the arrangement of the heat conduction shell, the liquid cooling assembly and the refrigeration assembly, a multi-layer heat dissipation system is formed, and the heat conduction shell is made of an aluminum nitride ceramic heat conduction material, so that heat generated by the battery module can be quickly conducted out; the heat exchange tube in the liquid cooling assembly is tightly attached to the heat conduction shell, cooling liquid circularly flows in the heat exchange tube, and a large amount of heat is taken away. The cooling liquid is refrigerated and cooled by the refrigeration assembly, so that the heat dissipation efficiency is further improved, the temperature of the battery is effectively controlled within a reasonable range, the performance and the service life of the battery are guaranteed, and the use safety and the reliability of the new energy automobile are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of mica insulation boxes, specifically relating to a mica insulation box for battery modules used in new energy vehicles. Background Technology

[0002] During the operation of new energy vehicles, the battery module generates a lot of heat. If it cannot be dissipated in a timely and effective manner, the battery temperature will be too high, which will lead to a decrease in battery performance, a shortened lifespan, and may even cause safety problems such as battery thermal runaway, seriously affecting the safety and reliability of new energy vehicles. Mica insulation boxes are insulation devices made primarily of mica. They possess characteristics such as high temperature resistance, excellent electrical insulation properties, high mechanical strength, and strong chemical stability, and are widely used in fields such as power, metallurgy, chemical industry, home appliances, and new energy.

[0003] Current insulation box heat dissipation designs for new energy vehicle battery modules have problems: incomplete heat dissipation paths, with most solutions relying on only a single heat dissipation method (such as pure air cooling or pure liquid cooling). For example, pure air cooling structures achieve air convection through openings in the box, but when the vehicle is in a high-temperature environment (such as summer sun exposure) or under high load (such as climbing hills or acceleration), the heat dissipation capacity cannot match the heat output, leading to a sudden rise in battery temperature. Although pure liquid cooling structures have higher heat dissipation efficiency, they lack a backup heat dissipation mechanism. Once the coolant leaks or the liquid pump fails, the heat dissipation system will fail directly, posing a risk of thermal runaway. To address these issues, we propose a mica insulation box for new energy vehicle battery modules to solve the problems existing in the current technology. Summary of the Invention

[0004] The purpose of this invention is to provide a mica insulating box for battery modules in new energy vehicles. By incorporating a heat-conducting shell, a liquid-cooling component, and a refrigeration component, a multi-layered heat dissipation system is formed. The heat-conducting shell is made of aluminum nitride ceramic thermally conductive material, which can quickly conduct the heat generated by the battery module away. The heat exchange pipes in the liquid-cooling component are tightly fitted to the heat-conducting shell, and the coolant circulates within the heat exchange pipes, carrying away a large amount of heat. The refrigeration component cools the coolant, further improving heat dissipation efficiency, effectively controlling the battery temperature within a reasonable range, ensuring battery performance and lifespan, and improving the safety and reliability of new energy vehicles, thereby solving the problems in the prior art mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A mica insulating box for a battery module in a new energy vehicle includes: The box body has an installation cavity and a heat exchange cavity inside; A heat-conducting shell is fixedly installed on the inner wall of the heat exchange cavity, and a heat exchange channel is reserved between the heat-conducting shell and the inner wall of the heat exchange cavity. A liquid cooling assembly is installed inside the mounting cavity. The liquid cooling assembly includes a coolant tank, a liquid pump, and heat exchange tubes. The coolant tank and the liquid pump are both fixedly installed inside the mounting cavity. The heat exchange tubes are installed inside the heat exchange channel. The inlet end of the heat exchange tubes is connected to the outlet end of the liquid pump, and the outlet end is connected to the inside of the coolant tank. The inlet end of the liquid pump is connected to the inside of the coolant tank through a pipe. It is used to exchange heat and cool down the battery module installed inside the heat-conducting shell. Both sets of refrigeration components are installed inside the mounting cavity and are used to cool the coolant in the coolant tank.

[0006] Preferably, the cooling assembly includes a semiconductor cooling chip and heat dissipation fins. The semiconductor cooling chip is installed through a fluororubber sealing ring on the side wall of the coolant tank. The cold end is welded to a copper heat-conducting sheet, which is completely immersed in the coolant. The heat dissipation fins are fixedly installed on the hot end of the semiconductor cooling chip.

[0007] Preferably, it also includes a cooling fan and a first dust filter. The cooling fan is installed through one side wall of the housing, with the air outlet of the cooling fan facing the heat dissipation fins, and the first dust filter is fixedly installed at the air inlet of the cooling fan.

[0008] Preferably, the heat-conducting shell is made of aluminum nitride ceramic thermally conductive material, the heat exchange tube has a U-shaped cross-section, and the inner side of the heat exchange tube is in contact with the outer wall of the heat-conducting shell.

[0009] Preferably, the outer wall of the heat exchange tube is evenly distributed with several sets of heat-conducting fins, one side of which is attached to the outer wall of the heat-conducting shell and the other side is attached to the inner wall of the heat exchange cavity. The several sets of heat-conducting fins are used to assist in heat conduction and limit the position of the heat exchange tube.

[0010] Preferably, ventilation openings are provided on both sides of the heat exchange chamber corresponding to both ends of the heat exchange channel, and a second dustproof net is fixedly installed inside the ventilation opening to form a through airflow channel.

[0011] Preferably, the interior of the heat-conducting shell is fixedly installed with three sets of partition plates at equal intervals. The partition plates are made of the same material as the heat-conducting shell and are tightly attached to the inner wall of the heat-conducting shell by laser welding. The three sets of partition plates divide the interior of the heat-conducting shell into four placement cavities for installing battery modules.

[0012] Preferably, temperature sensors are fixedly embedded on both inner walls of the box to monitor the temperature of the new energy vehicle battery inside the box. The temperature sensors are linked to the liquid pump, semiconductor cooling chip and cooling fan through a controller.

[0013] Preferably, the top of the box is fixedly installed with a box cover by bolts, and the box cover has two sets of wiring holes for external wiring of the battery module. Silicon rubber insulating sleeves are fixedly embedded in the wiring holes, and the inner diameter of the insulating sleeves matches the diameter of the external wiring.

[0014] Preferably, both the box body and the box cover are made of a rigid, plate-shaped insulating material, which is formed by bonding and pressing mica with high-temperature silicone resin.

[0015] Technical effects and advantages of the present invention: The mica insulating box for battery modules of new energy vehicles proposed in this invention has the following advantages compared with the prior art: This invention forms a multi-layered heat dissipation system through the arrangement of a heat-conducting shell, a liquid cooling component, and a refrigeration component. The heat-conducting shell is made of aluminum nitride ceramic thermally conductive material, which can quickly conduct away the heat generated by the battery module. The heat exchange tubes in the liquid cooling component are closely attached to the heat-conducting shell, and the coolant circulates in the heat exchange tubes, carrying away a large amount of heat. The refrigeration component cools the coolant, further improving heat dissipation efficiency, effectively controlling the battery temperature within a reasonable range, ensuring battery performance and lifespan, and improving the safety and reliability of new energy vehicles. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention in cross-section; Figure 2 This is a schematic diagram of the liquid cooling assembly and heat-conducting shell of the present invention; Figure 3 This is a side sectional view of the present invention. Figure 4 This is a schematic diagram of the structure of the heat exchange tube and heat-conducting fins of the present invention; Figure 5 This is a top view of the box body of the present invention; Figure 6 This is a side view of the three-dimensional structure of the present invention.

[0017] In the diagram: 1. Box body; 2. Mounting cavity; 3. Heat exchange cavity; 4. Heat-conducting shell; 5. Liquid cooling assembly; 51. Coolant tank; 52. Liquid pump; 53. Heat exchange tube; 54. Heat-conducting fins; 6. Refrigeration assembly; 61. Semiconductor refrigeration chip; 62. Heat dissipation fins; 63. Cooling fan; 64. First dustproof net; 7. Ventilation port; 8. Second dustproof net; 9. Partition plate; 10. Box cover; 11. Temperature sensor. 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. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. 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] This invention provides, for example Figures 1-6 shown A mica insulating box for a battery module in a new energy vehicle includes: Box 1, the interior of which is provided with mounting cavity 2 and heat exchange cavity 3; The heat-conducting shell 4 is fixedly installed on the inner wall of the heat exchange cavity 3, and a heat exchange channel is reserved between the heat-conducting shell 4 and the inner wall of the heat exchange cavity 3. The liquid cooling assembly 5 is installed in the mounting cavity 2. The liquid cooling assembly 5 includes a coolant tank 51, a liquid pump 52, and a heat exchange tube 53. The coolant tank 51 and the liquid pump 52 are both fixedly installed inside the mounting cavity 2. The heat exchange tube 53 is installed inside the heat exchange channel. The inlet end of the heat exchange tube 53 is connected to the outlet end of the liquid pump 52, and the outlet end is connected to the inside of the coolant tank 51. The inlet end of the liquid pump 52 is connected to the inside of the coolant tank 51 through a pipe. It is used to exchange heat and cool down the battery module installed inside the heat-conducting shell 4. It is worth noting that the liquid pump 52 uses a miniature DC gear pump, with the compatible model: DBP20-12V (automotive grade), voltage specification DC 12V, rated flow rate 20L / min, working pressure 0.3MPa, maximum head 3m, motor power 45W, and weight ≤150g; the shell is made of PA66+glass fiber reinforced material, with an IP67 protection rating, and is suitable for working temperatures from -40℃ to 85℃, supporting PWM speed control; the compatibility logic is: for battery modules with four placement chambers (total heat dissipation requirement of approximately 300W), the 20L / min flow rate can ensure that the coolant flow velocity in the heat exchange tube reaches 0.8m / s, and the 0.3MPa pressure overcomes the resistance of the U-shaped pipe. The 12V voltage is directly compatible with the vehicle power supply, and the IP67 protection meets the requirements of the humid environment of the battery compartment.

[0020] Coolant is drawn from the coolant tank 51 by the liquid pump 52 and delivered to the heat exchange tube 53. The heat exchange tube 53 exchanges heat with the heat-conducting shell 4 to reduce the surface temperature of the battery module installed in the heat-conducting shell 4. The cooled liquid is then delivered back to the coolant tank 1 through the outlet of the heat exchange tube 53. The cooling of the battery module in the heat-conducting shell 4 is achieved by circulating the coolant between the coolant tank 51, the liquid pump 52, and the U-shaped heat exchange tube 53.

[0021] Through the above technical solution, by setting up independent mounting cavity 2 and heat exchange cavity 3, physical isolation between liquid cooling component 5 and battery module is achieved, avoiding the impact of coolant leakage on battery insulation performance. At the same time, through closed liquid cooling circulation path, the effect of directional and efficient cooling is achieved. Two sets of cooling components 6 are installed in the mounting cavity 2 to cool the coolant in the coolant tank 51. By setting up two sets of cooling components 6, the coolant can be cooled down quickly, avoiding the risk of heat dissipation interruption when a single cooling source fails, and achieving the effect of improving the redundancy of the heat dissipation system.

[0022] In an optional embodiment: such as Figure 1 , 2 As shown in Figures 3 and 4, the cooling assembly 6 includes a semiconductor cooling chip 61 and heat dissipation fins 62. The semiconductor cooling chip 61 is installed through a fluororubber sealing ring on the side wall of the coolant tank 51. The cold end is welded to a copper heat-conducting sheet, which is completely immersed in the coolant. The heat dissipation fins 62 are fixedly installed on the hot end of the semiconductor cooling chip 61.

[0023] It is worth noting that the semiconductor cooling chip 61 adopts an automotive-grade TEC module, with the compatible model: TEC1-12706 (dual-redundant configuration), voltage specification DC 12V, rated current 6A, maximum cooling capacity 58W, maximum temperature difference ΔTmax 67℃, ceramic substrate thickness 0.635mm (alumina material), wire length 100mm (UL 1007 20AWG), vibration resistance level 10-2000Hz / 10G; the compatibility logic is: a single 58W cooling capacity can meet the heat dissipation load requirement of 150W, and dual parallel connections can cover the peak heat dissipation of 300W under extreme conditions. The maximum temperature difference of 67℃ ensures that the coolant can be reduced to below 5℃ in an environment of 35℃, which meets the automotive-grade AEC-Q104 reliability standard.

[0024] Through the above technical solution, by setting a fluororubber sealing ring and a copper heat-conducting sheet, the installation location of the semiconductor cooling chip 61 is sealed and protected and efficient heat conduction is achieved. The cold end of the semiconductor cooling chip 61 is cooled by the copper heat-conducting sheet, and the heat at the hot end is dissipated by the heat dissipation fins 62, ensuring that the coolant is always in the efficient heat dissipation temperature range. At the same time, the heat dissipation fins 62 are used to expand the heat dissipation area at the hot end, achieving the dual effect of improving cooling efficiency and preventing leakage.

[0025] It also includes a cooling fan 63 and a first dust filter 64. The cooling fan 63 is installed through one side wall of the housing 1, with the air outlet of the cooling fan 63 facing the heat dissipation fins 62. The first dust filter 64 is fixedly installed at the air inlet of the cooling fan 63.

[0026] It is worth noting that the cooling fan 63 uses a DC axial fan, compatible model: A9225H12B (automotive grade), voltage DC 12V, rated airflow 250CFM, air pressure 1.8mmH2O, noise 35dB, speed 3000rpm; bearing type: dual ball bearing, life ≥50000h, protection rating IP54, supports PWM speed regulation (500-3000rpm); adaptation logic: 250CFM airflow and 1.8mmH2O air pressure can penetrate the gap of the heat sink fins to form forced airflow, 35dB noise meets the requirements of vehicle quietness, dual ball bearing is adapted to the vibration environment of the battery compartment, and the heat dissipation efficiency is optimal when the distance between the fan and the hot end of the cooling chip is 10mm.

[0027] Through the above technical solution, by setting the cooling fan 63 to blow the cooling fins 62 in a directional manner, and cooperating with the first dustproof net 64 to filter the air intake, forced heat dissipation of the hot end of the semiconductor cooling chip 61 is achieved, while avoiding the decrease in heat dissipation efficiency caused by dust accumulation, thus achieving a long-term stable cooling effect.

[0028] In an optional embodiment: such as Figure 1 , 2 As shown in Figure 4, the heat-conducting shell 4 is made of aluminum nitride ceramic thermally conductive material, the heat exchange tube 53 has a U-shaped cross-section, and the inner side of the heat exchange tube 53 is in contact with the outer wall of the heat-conducting shell 4.

[0029] The above technical solution, by setting a high thermal conductivity aluminum nitride ceramic shell and a U-shaped heat exchange tube, achieves rapid heat transfer from the battery module to the coolant. At the same time, the U-shaped structure increases the contact area, thereby enhancing the heat exchange efficiency.

[0030] In an optional embodiment: such as Figure 2 , 3 As shown in Figure 4, several sets of heat-conducting fins 54 are evenly distributed on the outer wall of the heat exchange tube 53. One side of the heat-conducting fins 54 is attached to the outer wall of the heat-conducting shell 4, and the other side is attached to the inner wall of the heat exchange cavity 3. The several sets of heat-conducting fins 54 are used to assist in heat conduction and limit the position of the heat exchange tube 53.

[0031] Through the above technical solution, by setting bidirectional heat-conducting fins 54, multiple heat conduction paths are realized between the heat exchange tube 53 and the heat-conducting shell 4 and the heat exchange cavity 3. At the same time, the rigidity of the fins is used to complete the precise positioning of the heat exchange tube 53, thereby improving the heat conduction efficiency and structural stability.

[0032] In an optional embodiment: such as Figure 1 and 3 As shown, ventilation openings 7 are provided on both sides of the heat exchange chamber 3 at both ends of the heat exchange channel, and a second dustproof net 8 is fixedly installed inside the ventilation opening 7 to form a through airflow channel.

[0033] By using the above technical solution, directional airflow is formed by setting up ventilation openings 7 at both ends, and impurities are blocked by the second dustproof net 8, which realizes natural convection heat dissipation of air in the heat exchange channel. At the same time, it avoids the entry of external dust and its impact on the heat exchange effect, thus achieving the effect of enhancing passive heat dissipation capability.

[0034] In an optional embodiment: such as Figure 2 , 3 As shown in Figure 5, three sets of partition plates 9 are fixedly installed at equal intervals inside the heat-conducting shell 4. The partition plates 9 are made of the same material as the heat-conducting shell 4 and are tightly attached to the inner wall of the heat-conducting shell 4 by laser welding. The three sets of partition plates 9 divide the inside of the heat-conducting shell 4 into four placement cavities for installing battery modules.

[0035] Through the above technical solution, by setting up a partition plate 9 made of the same material and laser welded together, the independent placement and thermal isolation of each battery module are achieved, avoiding heat flow between modules. At the same time, laser welding ensures the insulation and sealing of the partition, thereby improving the safety of the module and the uniformity of heat dissipation.

[0036] In an optional embodiment: such as Figure 5 As shown, temperature sensors 11 are fixedly embedded on both inner walls of the box 1 to monitor the temperature of the new energy vehicle battery inside the box 1. The temperature sensors 11 are linked with the liquid pump 52, the semiconductor cooling chip 61, and the cooling fan 63 through the controller.

[0037] It is worth noting that the temperature sensor 11 uses an NTC thermistor sensor, with the adapter model: JP-10K-B3435 (for battery packs). The nominal resistance R25℃ = 10kΩ ±1%, the B value (25 / 85℃) = 3435K ±1%, the temperature measurement range is -40℃ to 125℃, and the accuracy is ±1.2℃ (25-45℃). The probe size is φ2.8×8mm (polyimide encapsulation), the wire length is 80mm (PVC parallel wire UL 2651 28AWG), and the connector model is HX20018-2Y. The adapter logic is as follows: the 10kΩ nominal resistance is directly compatible with the battery management system (BMS), the 3435K B value ensures measurement accuracy in the core range of 25-85℃, the polyimide encapsulation is resistant to electrolyte corrosion, and the φ2.8mm probe can be embedded in the gap of the heat-conducting shell to achieve accurate temperature measurement.

[0038] Through the above technical solution, by setting the linkage control between the temperature sensor 11 and the heat dissipation structure (for example, when the temperature is ≥35℃, the liquid pump 52 is activated; when the temperature is ≥50℃, the semiconductor cooling chip is activated; and when the temperature is ≤25℃, all components are shut down), the heat dissipation intensity is automatically adjusted according to the battery temperature, avoiding energy waste or insufficient heat dissipation, and achieving the effect of intelligent temperature control and energy saving.

[0039] In an optional embodiment: such as Figure 6 As shown, the top of the box body 1 is fixedly installed with a box cover 10 by bolts, and the box cover 10 has two sets of wiring holes for external circuits of the battery module. Silicone rubber insulating sleeves are fixedly embedded in the wiring holes, and the inner diameter of the insulating sleeves matches the diameter of the external circuits.

[0040] By using the above technical solution, the box cover 10 fixed with bolts and the silicone rubber insulating sleeve are set up to achieve convenient opening and closing of the box body 1 and double insulation of the circuit interface, avoiding the risk of leakage caused by the circuit contacting the box body 1, and achieving the effect of improving assembly efficiency and insulation reliability.

[0041] In an optional embodiment: such as Figure 6 As shown, both the box body 1 and the box cover 10 are made of a rigid plate-shaped insulating material, which is formed by bonding and pressing mica with high-temperature silicone resin.

[0042] Through the above technical solution, by setting a composite structure of mica and high-temperature silicone resin, the high temperature resistance (-60℃~1200℃) and high insulation (insulation resistance ≥10¹) of the box are achieved. 4 (Ω・cm), while the rigid plate structure ensures mechanical strength, achieving the effect of meeting the harsh working conditions of the battery compartment of new energy vehicles.

[0043] Working principle: When the battery module is working, the heat it generates is quickly conducted to the outer wall through the aluminum nitride ceramic heat-conducting shell 4. Some of the heat is dissipated through the natural airflow formed by the vents 7 of the heat exchange chamber 3 (passive heat dissipation). At the same time, the temperature sensor 11 monitors the battery temperature in real time. When the temperature is ≥35℃, the controller starts the liquid pump 52. The coolant circulates between the coolant tank 51, the liquid pump 52, and the U-shaped heat exchange tube 53. The coolant absorbs heat through the contact surface between the heat exchange tube 53 and the heat-conducting shell 4 and the heat-conducting fins 54, achieving active liquid cooling. If the temperature continues to rise to ≥50℃, the controller simultaneously starts the semiconductor cooling chip 61 and the cooling fan 63. The cold end of the semiconductor cooling chip 61 cools the coolant through the copper heat-conducting fins, while the heat from the hot end is forcibly discharged through the heat dissipation fins 62 and the fan, ensuring that the coolant is always in the efficient heat dissipation temperature range. When the temperature drops to ≤25℃, the controller gradually shuts down the heat dissipation components to reduce energy consumption. Throughout the process, the mica-material box 1 and the box cover 10 provide insulation protection, the partition plate 9 avoids thermal interference between battery packs, and the silicone rubber insulating sleeve ensures the safety of the circuit interface. The multi-structure collaboration realizes the integrated protection of the battery module in terms of "insulation-heat dissipation-intelligent temperature control".

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is 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 mica insulating box for a battery module in a new energy vehicle, characterized in that, include: The box body (1) has an installation cavity (2) and a heat exchange cavity (3) inside. A heat-conducting shell (4) is fixedly installed on the inner wall of the heat exchange cavity (3), and a heat exchange channel is reserved between the heat-conducting shell (4) and the inner wall of the heat exchange cavity (3); The liquid cooling assembly (5) is installed in the mounting cavity (2). The liquid cooling assembly (5) includes a coolant tank (51), a liquid pump (52), and a heat exchange tube (53). The coolant tank (51) and the liquid pump (52) are both fixedly installed inside the mounting cavity (2). The heat exchange tube (53) is installed inside the heat exchange channel. The inlet end of the heat exchange tube (53) is connected to the outlet of the liquid pump (52), and the outlet end is connected to the inside of the coolant tank (51). The inlet of the liquid pump (52) is connected to the inside of the coolant tank (51) through a pipe. It is used to exchange heat and cool down the battery module installed inside the heat-conducting shell (4). Two sets of refrigeration components (6) are installed in the mounting cavity (2) to cool the coolant in the coolant tank (51).

2. The mica insulating box for a battery module in a new energy vehicle according to claim 1, characterized in that: The cooling assembly (6) includes a semiconductor cooling chip (61) and heat dissipation fins (62). The semiconductor cooling chip (61) is installed on the side wall of the coolant tank (51) through a fluororubber sealing ring. The cold end is welded to a copper heat-conducting sheet, which is completely immersed in the coolant. The heat dissipation fins (62) are fixedly installed on the hot end of the semiconductor cooling chip (61).

3. The mica insulating box for a battery module in a new energy vehicle according to claim 2, characterized in that: It also includes a cooling fan (63) and a first dust filter (64). The cooling fan (63) is installed through the side wall of the box (1), with the air outlet of the cooling fan (63) facing the heat dissipation fins (62). The first dust filter (64) is fixedly installed at the air inlet of the cooling fan (63).

4. The mica insulating box for a battery module in a new energy vehicle according to claim 1, characterized in that: The heat-conducting shell (4) is made of aluminum nitride ceramic heat-conducting material, the heat exchange tube (53) has a U-shaped cross section, and the inner side of the heat exchange tube (53) is attached to the outer wall of the heat-conducting shell (4).

5. The mica insulating box for a battery module in a new energy vehicle according to claim 4, characterized in that: The outer wall of the heat exchange tube (53) is evenly distributed with several sets of heat-conducting fins (54), and one side of the heat-conducting fins (54) is attached to the outer wall of the heat-conducting shell (4), and the other side is attached to the inner wall of the heat exchange cavity (3). The several sets of heat-conducting fins (54) are used to assist in heat conduction and limit the heat exchange tube (53).

6. The mica insulating box for a battery module in a new energy vehicle according to claim 1, characterized in that: Ventilation openings (7) are provided on both sides of the heat exchange chamber (3) corresponding to the two ends of the heat exchange channel, and a second dustproof net (8) is fixedly installed inside the ventilation opening (7) to form a through airflow channel.

7. The mica insulating box for a battery module in a new energy vehicle according to claim 1, characterized in that: The interior of the heat-conducting shell (4) is fixedly installed with three sets of partition plates (9) at equal intervals. The partition plates (9) are made of the same material as the heat-conducting shell (4) and are tightly attached to the inner wall of the heat-conducting shell (4) by laser welding. The three sets of partition plates (9) divide the interior of the heat-conducting shell (4) into four placement cavities for installing battery modules.

8. The mica insulating box for a battery module in a new energy vehicle according to claim 3, characterized in that: Temperature sensors (11) are fixedly embedded on both inner walls of the box (1) to monitor the temperature of the new energy vehicle battery inside the box (1). The temperature sensors (11) are linked with the liquid pump (52), the semiconductor cooling chip (61), and the cooling fan (63) through the controller.

9. A mica insulating box for a battery module in a new energy vehicle according to claim 1, characterized in that: The top of the box body (1) is fixedly installed with a box cover (10) by bolts, and the box cover (10) has two sets of wiring holes for external circuits of the battery module. Silicon rubber insulating sleeves are fixedly embedded in the wiring holes, and the inner diameter of the insulating sleeves matches the diameter of the external circuits.

10. A mica insulating box for a battery module in a new energy vehicle according to claim 9, characterized in that: Both the box body (1) and the box cover (10) are made of a rigid plate-shaped insulating material, which is formed by bonding and pressing mica with high-temperature silicone resin.

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