New energy automobile battery thermal management device and method

Abstract

The invention is suitable for the technical field of battery heat management devices, provides a new energy automobile battery heat management device and method, and constructs a set of composite heat dissipation and heat management scheme based on vehicle driving kinetic energy by arranging an impeller controlled by a driving mechanism to lift, a linkage mechanism, an air cooling mechanism and a special air duct. When the automobile runs, the driving mechanism enables the impeller to descend into airflow, and head-on wind is used for driving the impeller to rotate. The kinetic energy synchronously drives a fan of the air cooling mechanism to rotate through the linkage mechanism, and air cooling heat dissipation of fins and pipelines of the cooling mechanism is strengthened. Meanwhile, the heated air is collected through the flow guide cavity and the flow collecting frame and is distributed through the distributing and discharging pipes. The branch discharging pipe is provided with an electromagnetic valve, and hot air can be selectively guided to the compartment for heating in winter or directly discharged to the external environment according to season requirements. According to the scheme, wind resistance generated by vehicle running is creatively converted into effective power for driving the heat dissipation system, and heat is distributed according to needs.

Description

Technical Field

[0001] This invention belongs to the technical field of battery thermal management devices, and particularly relates to a thermal management device and method for new energy vehicle batteries. Background Technology

[0002] With the global energy structure transformation and increased environmental awareness, the new energy vehicle industry is developing rapidly. As a core component of new energy vehicles, the performance, safety, and lifespan of the power battery are highly dependent on its operating temperature. The battery thermal management system (BTMS), through cooling or heating measures, ensures that the battery pack operates within its optimal temperature range, which is crucial for guaranteeing the performance of electric vehicles.

[0003] Currently, electric vehicle battery thermal management technologies mainly fall into several categories: air cooling, liquid cooling, and phase change material cooling. Air cooling systems are simple in structure and low in cost, and were widely used in early electric vehicles. However, they have a low heat transfer coefficient and poor cooling effect, making it difficult to achieve a uniform temperature field inside the battery pack, especially under high temperature or high-rate discharge conditions where heat dissipation is insufficient. Liquid cooling systems remove heat through coolant circulation, offering high heat transfer efficiency and better cooling than air cooling, making them the preferred solution for many electric passenger vehicles.

[0004] Existing thermal management systems, which actively operate (such as coolant pumps, fans, and PTC heaters), typically rely on the battery's own electrical energy. They fail to efficiently integrate and reuse surplus energy generated during vehicle operation (such as high-speed airflow) or waste heat, resulting in deficiencies in system energy consumption optimization and comprehensive energy utilization. Furthermore, the heat generated by the battery is usually directly dissipated into the environment without effective management or utilization. For example, additional electrical energy is required to heat the passenger compartment in winter, indicating a need to improve energy efficiency. Summary of the Invention

[0005] This invention provides a thermal management device and method for new energy vehicle batteries, aiming to solve the problem that current thermal management systems fail to efficiently integrate and reuse surplus energy (such as high-speed airflow energy) or waste heat generated during vehicle operation.

[0006] This invention is implemented as follows: a thermal management device for a new energy vehicle battery, comprising: The battery box has a support platform inside for supporting and mounting the lithium battery. A cooling mechanism is provided on the outside of the lithium battery; A coolant tray is fixedly installed at the bottom of one side of the battery box; The flow conveying mechanism located at the top of the coolant frame is used to transport the coolant inside the coolant frame to the cooling mechanism for liquid cooling of the lithium battery. The air-cooling mechanism located on one side of the current transmission mechanism is used to provide air-cooling heat dissipation for the lithium battery and the cooling mechanism. The drive mechanism is located at the bottom of the battery box; The linkage mechanism connected between the drive mechanism and the air-cooling mechanism can drive the linkage mechanism through the drive mechanism, and in turn, can synchronously drive the air-cooling mechanism and the flow transmission mechanism through the linkage mechanism.

[0007] Preferably, the drive mechanism includes: Two side plates fixed to the bottom of the battery box; An outer frame that is slidably disposed between the two side panels; Rotate the impeller connected to the inner side of the outer frame; A lead screw fixed to the top of the impeller; An internally threaded cylinder is threaded onto the outer wall of the lead screw, and the internally threaded cylinder rotatably passes through the bottom of the battery box; The first bevel gear is fixed to the outer wall of the internally threaded cylinder; A second bevel gear is engaged with one side of the internally threaded cylinder; A motor is fixedly installed inside the battery box to drive the second bevel gear.

[0008] Preferably, the current transmission mechanism includes: A U-shaped tube is fixedly extended into the interior of the coolant frame, and two one-way valves are provided on the inner sides of the two vertical tubes of the U-shaped tube; Two fixedly connected liquid extraction tubes are provided on the U-shaped tube, and the connection port between the liquid extraction tube and the U-shaped tube is located between the two one-way valves. Two pistons, each slidably fitted inside one of the two extraction tubes; A vertical plate fixed to the top of the coolant frame; A rocker arm hinged to the top of the coolant frame; A turntable is rotatably connected to the outer wall of the vertical plate. A push column is fixedly connected to the outer wall of the turntable, and the push column is slidably sleeved in the inner cavity of the swing rod. A hanging ring fixed to the outer wall of the piston and the rocker arm; Hooks used to connect the hanging rings on the outer wall of the piston and the rocker arm.

[0009] Preferably, the cooling mechanism includes: Multiple annular tubes are uniformly sleeved on the outer wall of the lithium battery; A liquid inlet tank is disposed on one side of the lithium battery. The liquid inlet tank is fixedly connected to the U-shaped tube through a liquid inlet cylinder. Each of the annular tubes is fixedly connected to the liquid inlet tank through multiple liquid inlet pipes. A drain tank is located on the other side of the lithium battery. The drain tank is fixedly connected to the coolant frame through a drain cylinder. Each of the annular pipes is fixedly connected to the drain tank through multiple drain pipes. Multiple fins are fixedly sleeved on the outer wall of the inlet pipe and the outlet pipe.

[0010] Preferably, the linkage mechanism includes: A worm gear is disposed on one side of the outer frame, and the worm gear is coaxially and fixedly connected to the impeller. A fixing block fixed to the side wall of the outer frame; Rotate the worm gear connected to the bottom of the fixed block, and the worm gear meshes with the worm. A star-shaped cylinder is rotatably connected to the top of the fixed block, and the star-shaped cylinder slides through the bottom of the battery box, and the star-shaped cylinder is fixedly connected to the worm gear; A star-shaped shaft is slidably inserted into the inner side of the star-shaped cylinder, and a third bevel gear is fixedly connected to the top end of the star-shaped shaft; A connecting plate is fixed to the side wall of the upright plate, and the star-shaped shaft rotates through the interior of the connecting plate.

[0011] Preferably, the air-cooling mechanism includes two fans respectively disposed on one side of the two vertical tubes of the U-shaped tube, and the fans are rotatably connected to the vertical tubes of the U-shaped tube via shafts.

[0012] Preferably, the air-cooling mechanism further includes a fourth bevel gear that meshes with the third bevel gear. The fourth bevel gear is rotatably connected to the outer wall of the vertical plate via a shaft, and the turntable is coaxially fixed to the fourth bevel gear.

[0013] Preferably, the fan and the fourth bevel gear are connected by a transmission component, the transmission component including a first sprocket fixed to the fan shaft and a second sprocket fixed to the fourth bevel gear shaft, and a chain is drivingly connected between the second sprocket and the first sprocket.

[0014] Preferably, a filter port is provided on one end wall of the battery box, and a right-angle baffle is fixedly connected to the outer wall of the battery box outside the filter port. A flow guiding cavity is opened on the inner wall of the other end of the battery box. A flow collecting frame is fixedly connected inside the flow guiding cavity, and two branch pipes, each equipped with a solenoid valve, are fixedly connected to the outer wall of the flow collecting frame.

[0015] A method for thermal management of a new energy vehicle battery, using a new energy vehicle battery thermal management device as described above, includes the following steps: Step 1: Start the drive mechanism, control the motor to work, and lower the lead screw through gear transmission to place the impeller in the airflow generated by the car's movement; Step 2: Utilizing the airflow drive system, the airflow during vehicle movement drives the impeller to rotate, and the power is transmitted to the air-cooling mechanism and the air-transporting mechanism through the linkage mechanism; Step 3: Perform composite heat dissipation: Air cooling: The linkage mechanism drives the fan to rotate, which forces air cooling of the fins and pipes of the cooling mechanism; Liquid cooling: The linkage mechanism simultaneously drives the piston of the flow transmission mechanism to reciprocate, pumping the coolant from the coolant box into the annular pipe, carrying away the heat of the lithium battery, and then flowing back to the coolant box to complete the cycle; Step 4: Heat management and distribution. The heated air is collected through the guide cavity and the rapid flow frame, and then distributed by the distribution pipes according to demand.

[0016] Compared with related technologies, the thermal management device and method for new energy vehicle batteries provided by the present invention have the following beneficial effects: 1. Composite Heat Dissipation and Energy Recovery Based on Airflow Energy: This invention constructs a composite heat dissipation and heat management scheme based on the kinetic energy of vehicle movement by setting up an impeller controlled by a drive mechanism, a linkage mechanism, an air-cooling mechanism, and special air ducts (guide cavity, collection frame, and distribution pipes). When the car is moving, the drive mechanism lowers the impeller into the airflow, using the oncoming wind to drive the impeller to rotate. This kinetic energy synchronously drives the fan of the air-cooling mechanism to rotate through the linkage mechanism, enhancing the air-cooling heat dissipation of the fins and pipes of the cooling mechanism; at the same time, the heated air is collected through the guide cavity and collection frame and distributed by the distribution pipes. The distribution pipes are equipped with solenoid valves, which can selectively guide hot air into the cabin for winter heating or directly exhaust it to the outside environment according to seasonal needs. This scheme creatively converts the wind resistance generated by vehicle movement into effective power to drive the heat dissipation system and realizes on-demand heat distribution. First, it significantly reduces the power consumption of the air-cooling system, achieves energy-saving operation, and helps to extend the vehicle's driving range. Secondly, in winter, the waste heat generated by the battery can be used for cabin heating, reducing reliance on an additional PTC heater and improving the overall energy efficiency of the vehicle, which aligns with the trend of energy conservation and environmental protection. Finally, the synergy between active air cooling and liquid cooling enhances the system's heat dissipation capacity under high-load conditions, helping to maintain the battery temperature within the optimal range and improving battery performance and lifespan. 2. High-Efficiency Liquid Cooling and System Integration Driven by Mechanical Linkage: This invention designs a liquid cooling system driven by mechanical linkage. The power of the impeller rotation is transmitted to the flow conveying mechanism through the worm gear, worm wheel, star shaft, and star cylinder in the linkage mechanism. The flow conveying mechanism cleverly converts the rotational motion of the turntable into the reciprocating oscillation of the lever, which in turn drives two pistons to move alternately in the liquid extraction tube. Combined with four one-way valves in the U-shaped tube, this forms a mechanical piston pump, realizing a continuous circulation of coolant from the coolant frame to the annular tube of the cooling mechanism and back to the coolant frame. The cooling mechanism uses an annular tube to directly enclose the lithium battery, and increases the heat dissipation area through fins on the inlet and outlet pipes. This solution replaces the traditional electric liquid pump with pure mechanical transmission, firstly avoiding the energy consumption of the electric pump, further reducing the battery power consumption of the thermal management system, which is beneficial for energy saving. Secondly, the mechanical pump structure is reliable, and it drives both the liquid cooling and air cooling systems simultaneously through a single power source (impeller), achieving high integration, reducing the number of parts and system complexity, which aligns with the future development trend of lightweight and integrated thermal management systems. Furthermore, the design of directly wrapping the battery with an annular tube and combining it with fins increases the heat exchange area, resulting in high liquid cooling efficiency and rapid heat removal from the battery. The air cooling mechanism simultaneously provides forced air cooling to these fins and tubes, forming a composite heat dissipation mode of "liquid cooling + air cooling". This significantly improves the overall heat dissipation efficiency and temperature uniformity of the system, effectively ensuring the safety and reliability of the battery under harsh operating conditions such as high-rate discharge. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the inner structure of the battery box of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the assembly structure of the flow conveying mechanism and the cooling mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the current conveying mechanism of the present invention; Figure 6 This is a schematic diagram of the linkage mechanism and air-cooling mechanism of the present invention.

[0018] In the picture: 1. Battery box; 11. Right-angle baffle; 12. Filter port; 13. Current collector frame; 14. Flow guide cavity; 15. Distribution pipe; 2. Drive mechanism; 21. Side plate; 22. Outer frame; 23. Impeller; 24. Lead screw; 25. Internal threaded cylinder; 26. First bevel gear; 27. Second bevel gear; 28. Motor; 3. Lithium battery; 4. Coolant reservoir; 5. Flow conveying mechanism; 51. U-shaped tube; 52. Liquid suction tube; 53. Vertical plate; 54. Turntable; 541. Push column; 55. Piston; 56. Check valve; 57. Rocker arm; 58. Hook; 59. Hanging ring; 6. Cooling mechanism; 61. Liquid inlet tank; 62. Liquid outlet tank; 63. Liquid inlet pipe; 64. Liquid outlet pipe; 65. Annular pipe; 66. Fins; 67. Liquid inlet cylinder; 68. Liquid outlet cylinder; 7. Linkage mechanism; 71. Worm gear; 72. Worm wheel; 73. Fixed block; 74. Star shaft; 75. Star cylinder; 76. Connecting plate; 77. Third bevel gear; 8. Air-cooling mechanism; 81. Fan; 82. Fourth bevel gear; 83. Transmission components; 831. First sprocket; 832. Chain; 833. Second sprocket; 9. Support platform. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Example 1

[0021] A preferred embodiment of the new energy vehicle battery thermal management device and method provided by the present invention is as follows: Figures 1 to 6 As shown: A thermal management device for a new energy vehicle battery, comprising: The battery box 1 includes a support platform 9 for supporting and mounting the lithium battery 3 on its inner side; a cooling mechanism 6 located on the outer side of the lithium battery 3; a coolant frame 4 fixedly installed on the bottom side of one side of the battery box 1; a flow conveying mechanism 5 located on the top of the coolant frame 4 for conveying coolant from inside the coolant frame 4 to the cooling mechanism 6 for liquid cooling of the lithium battery 3; an air cooling mechanism 8 located on the side of the flow conveying mechanism 5 for air cooling of the lithium battery 3 and the cooling mechanism 6; a drive mechanism 2 located at the bottom of the battery box 1; and a linkage mechanism 7 connecting the drive mechanism 2 and the air cooling mechanism 8. The drive mechanism 2 can drive the linkage mechanism 7, which in turn can synchronously drive the air cooling mechanism 8 and the flow conveying mechanism 5.

[0022] Furthermore, a filter port 12 is provided on one end wall of the battery box 1, and a right-angle baffle 11 is fixedly connected to the outer wall of the battery box 1 outside the filter port 12. A flow guide cavity 14 is opened on the inner wall of the other end of the battery box 1. A flow collector frame 13 is fixedly connected inside the flow guide cavity 14. Two distribution pipes 15, each equipped with a solenoid valve, are fixedly connected to the outer wall of the flow collector frame 13.

[0023] In this embodiment, the drive mechanism 2 is activated. Power is transmitted and distributed through the linkage mechanism 7. The linkage mechanism 7 synchronously drives the air-cooling mechanism 8 and the flow-transfer mechanism 5 to start working. The flow-transfer mechanism 5 acts like a piston pump, pumping coolant from the coolant reservoir 4 into the cooling mechanism 6 surrounding the battery. After directly absorbing heat from the battery, the coolant flows back to the coolant reservoir 4, completing one cycle. Simultaneously, the fan 81 of the air-cooling mechanism 8 starts rotating, and the generated airflow blows across the heat dissipation surface of the cooling mechanism 6, enhancing the heat dissipation effect. This "liquid cooling + air cooling" composite method combines the advantages of high heat exchange efficiency of liquid cooling and the relatively simple structure of air cooling, aiming to meet the heat dissipation requirements under high loads. The heat carried away by the air-cooling airflow can be managed through specific air ducts. For example, in winter, this heat can be used for heating inside the vehicle, realizing energy recovery and utilization, and helping to reduce the overall vehicle energy consumption.

[0024] In a further preferred embodiment of the present invention, the drive mechanism 2 includes: two side plates 21 fixed to the bottom of the battery box 1; an outer frame 22 slidably disposed between the two side plates 21; an impeller 23 rotatably connected to the inner side of the outer frame 22; a lead screw 24 fixed to the top of the impeller 23; an internally threaded cylinder 25 threaded onto the outer wall of the lead screw 24, the internally threaded cylinder 25 rotatably passing through the bottom of the battery box 1; a first bevel gear 26 fixed to the outer wall of the internally threaded cylinder 25; a second bevel gear 27 meshing with one side of the internally threaded cylinder 25; and a motor 28 fixedly installed inside the battery box 1 for driving the second bevel gear 27.

[0025] In this embodiment, the mechanism provides two power sources. First, by starting the motor 28, the second bevel gear 27 and the first bevel gear 26 mesh and drive the internal threaded cylinder 25 to rotate. The internal threaded cylinder 25 and the fixed lead screw 24 form a helical pair, thereby converting the rotational motion of the internal threaded cylinder 25 into the linear lifting motion of the lead screw 24 and its connected components, the outer frame 22 and the impeller 23. Second, when the impeller 23 descends into the airflow path generated by the vehicle's movement, the airflow impacts the impeller 23, causing it to rotate, converting the vehicle's kinetic energy into mechanical energy to drive the cooling system.

[0026] In a further preferred embodiment of the present invention, the flow conveying mechanism 5 includes: a U-shaped tube 51 fixedly extending into the interior of the coolant frame 4, with two one-way valves 56 provided on the inner sides of the two vertical tubes of the U-shaped tube 51; two suction tubes 52 fixedly connected to the U-shaped tube 51, with the connection port between the suction tubes 52 and the U-shaped tube 51 located between the two one-way valves 56; two pistons 55 respectively slidably sleeved inside the two suction tubes 52; a vertical plate 53 fixedly connected to the top of the coolant frame 4; a rocker arm 57 hinged to the top of the coolant frame 4; a turntable 54 rotatably connected to the outer wall of the vertical plate 53, with a pusher 541 fixedly connected to the outer wall of the turntable 54, the pusher 541 slidably sleeved in the inner cavity of the rocker arm 57; a hanging ring 59 fixedly connected to the outer walls of the pistons 55 and the rocker arm 57; and a hook 58 for connecting the pistons 55 and the hanging rings 59 on the outer walls of the rocker arm 57.

[0027] In this embodiment, the mechanism is essentially a piston pump driven by mechanical transmission. The linkage mechanism 7 ultimately drives the turntable 54 to rotate, and the pusher 541 on the turntable 54 moves within the groove of the swing arm 57, converting the continuous rotational motion of the turntable 54 into the reciprocating oscillation of the swing arm 57. The swing arm 57, through the hook 58 and the hanging ring 59, drives two pistons 55 to perform reciprocating linear motion within the suction pipe 52 with a phase difference of 180 degrees. The clever arrangement of four one-way valves 56 within the U-shaped tube 51 controls the flow direction of the coolant. When one piston 55 returns, it draws coolant from the coolant frame 4 into the suction pipe 52; simultaneously, the other piston 55 performs a pressure stroke, pumping the coolant drawn in during the previous cycle out to the upward pipe of the U-shaped tube 51, thus forming a continuous coolant flow. This efficient conversion of rotational motion into linear reciprocating motion results in a simple and reliable structure. The design of the double pistons and one-way valves ensures the continuity of coolant delivery, avoids flow interruptions, and provides a stable liquid cooling effect for the battery. Its mechanical drive eliminates the need for an additional electric water pump, which helps reduce system energy consumption and costs.

[0028] In a further preferred embodiment of the present invention, the cooling mechanism 6 includes: a plurality of annular tubes 65 uniformly sleeved on the outer wall of the lithium battery 3; an inlet tank 61 disposed on one side of the lithium battery 3, the inlet tank 61 being fixedly connected to the U-shaped tube 51 through an inlet cylinder 67, and each annular tube 65 being fixedly connected to the inlet tank 61 through a plurality of inlet pipes 63; a drain tank 62 disposed on the other side of the lithium battery 3, the drain tank 62 being fixedly connected to the coolant frame 4 through a drain cylinder 68, and each annular tube 65 being fixedly connected to the drain tank 62 through a plurality of drain pipes 64; and a plurality of fins 66 fixedly sleeved on the outer wall of the inlet pipes 63 and the drain pipes 64.

[0029] In this embodiment, after the coolant is pumped in from the flow mechanism 5, it flows sequentially through the inlet tank 61 and each inlet pipe 63, and enters the annular pipe 65 that tightly wraps around each lithium battery 3. The annular pipe 65 exchanges heat with the battery surface, directly carrying away the heat generated by the battery. The coolant, after absorbing heat, is collected in the drain tank 62 through each drain pipe 64, and finally returns to the coolant frame 4 through the drain cylinder 68 to complete the circulation. The fins 66 fixed on the inlet pipe 63 and drain pipe 64 increase the contact area with air. The design of the annular pipe 65 directly wrapping the battery increases the heat exchange area, improves the cooling efficiency, and helps to maintain the battery temperature within the ideal operating range. The design of the fins 66 further enhances the heat dissipation capacity, and combined with the forced air cooling of the subsequent air cooling mechanism 8, it forms a composite heat dissipation system, which can more effectively control the battery temperature, especially suppressing battery overheating under high load conditions.

[0030] In a further preferred embodiment of the present invention, the linkage mechanism 7 includes: a worm 71 disposed on one side of the outer frame 22, the worm 71 being coaxially and fixedly connected to the impeller 23; a fixing block 73 fixedly connected to the side wall of the outer frame 22; a worm wheel 72 rotatably connected to the bottom of the fixing block 73, the worm wheel 72 meshing with the worm 71; a star-shaped cylinder 75 rotatably connected to the top of the fixing block 73, the star-shaped cylinder 75 slidingly penetrating the bottom of the battery box 1, the star-shaped cylinder 75 being fixedly connected to the worm wheel 72; a star-shaped shaft 74 slidably inserted into the inner side of the star-shaped cylinder 75, the top end of the star-shaped shaft 74 being fixedly connected to a third bevel gear 77; and a connecting plate 76 fixedly connected to the side wall of the vertical plate 53, the star-shaped shaft 74 rotatably penetrating the interior of the connecting plate 76.

[0031] In this embodiment, the mechanism serves as a "gearbox and steering knuckle" for power transmission. The rotation of the impeller 23 drives the worm gear 71, which meshes with the worm wheel 72, achieving a first-stage reduction and changing the direction of power transmission. The worm wheel 72 drives the star-shaped cylinder 75 to rotate, and the star-shaped cylinder 75, through its internal star spline, engages with the star-shaped shaft 74, transmitting power to the star-shaped shaft 74. This spline connection allows the star-shaped shaft 74 to slide axially relative to the star-shaped cylinder 75 while transmitting torque, thus adapting to the axial displacement changes generated by the drive mechanism 2 during lifting and lowering. Finally, the power is output through the third bevel gear 77 at the top of the star-shaped shaft 74. This achieves reliable power transmission and motion compensation for the mechanism. The worm gear drive has the advantages of a large transmission ratio and self-locking function. The spline connection cleverly resolves the contradiction between rotary drive and axial movement, ensuring the continuity of power transmission during the lifting and lowering of the impeller 23, making the overall structure more compact and reasonable.

[0032] In a further preferred embodiment of the present invention, the air-cooling mechanism 8 includes two fans 81 respectively disposed on one side of the two vertical tubes of the U-shaped tube 51. The fans 81 are rotatably connected to the vertical tubes of the U-shaped tube 51 via shafts. The air-cooling mechanism 8 also includes a fourth bevel gear 82 meshing with a third bevel gear 77. The fourth bevel gear 82 is rotatably connected to the outer wall of the vertical plate 53 via a shaft, and the turntable 54 is coaxially fixed to the fourth bevel gear 82. The fans 81 and the fourth bevel gear 82 are connected by a transmission component 83. The transmission component 83 includes a first sprocket 831 fixed to the shaft of the fans 81 and a second sprocket 833 fixed to the shaft of the fourth bevel gear 82. A chain 832 is drivingly connected between the second sprocket 833 and the first sprocket 831.

[0033] In this embodiment, the power from the linkage mechanism 7 is transmitted to the meshing fourth bevel gear 82 via the third bevel gear 77, thereby changing the direction of power again. The shaft of the fourth bevel gear 82 transmits power synchronously to the two fans 81 via the chain drive component 83, including the second sprocket 833, the chain 832, and the first sprocket 831, driving the fans 81 to rotate and generate cooling airflow. This airflow blows directly onto the fins 66 and pipe surfaces of the cooling mechanism 6, enhancing convective heat transfer. The heated air is guided by the system and collected in the flow guide cavity 14 to the flow collector frame 13. Working in conjunction with the liquid cooling system, a composite heat dissipation mode of "liquid cooling + air cooling" is formed, significantly enhancing the overall heat dissipation capacity of the system.

[0034] A method for thermal management of a new energy vehicle battery: During operation, the motor 28 is started, and the motor 28 drives the second bevel gear 27 to rotate through its output shaft. The second bevel gear 27 drives the internal threaded cylinder 25 to rotate through the first bevel gear 26, allowing the lead screw 24 to slide along the inner wall of the internal threaded cylinder 25. At the same time, the star-shaped cylinder 75 can slide vertically along the outer wall of the star-shaped shaft 74. The lead screw 24 is moved downward, causing the outer frame 22 to drive the impeller 23 to move downward. When the car is moving, airflow is generated, which pushes the impeller 23, causing it to rotate. The impeller 23 drives the worm gear 71 to rotate, thereby causing the worm wheel 72 meshing with the worm gear 71 to rotate. In turn, the worm wheel 72 drives the star-shaped cylinder 75 to rotate, and the star-shaped cylinder 75 drives the star-shaped shaft 74 to rotate inside the connecting plate 76, causing the star-shaped shaft 74 to drive the third bevel gear 77 to rotate.

[0035] When the third bevel gear 77 rotates, it drives the two second sprockets 833 to rotate synchronously via its shaft. The chain 832 transmits power to the two first sprockets 831, thereby driving the two fans 81 to rotate. The airflow generated by the fans 81 provides air cooling to the fins 66, the inlet pipe 63, and the outlet pipe 64. The hot air is collected through the guide cavity 14 and discharged through the collector frame 13. In practical applications, one of the branch pipes 15 can be connected to the air conditioning vent inside the car through a pipe. In winter conditions, heat can be delivered to the car interior for heating through one of the branch pipes 15, while the other branch pipe 15 is suitable for summer, discharging heat outdoors.

[0036] During the rotation of turntable 54, turntable 54 drives the pusher pin 541 on it to revolve. The pusher pin 541 slides back and forth inside the swing arm 57, pushing and pulling the swing arm 57, so that the swing arm 57 can swing back and forth about the hinge point with the coolant frame 4. The swinging swing arm 57 pushes and pulls the piston 55 through the hook 58, so that the piston 55 slides back and forth inside the suction pipe 52. For details, refer to Figure 4 and Figure 5When the two pistons 55 move to the left in sync, the one-way valve 56 located in the lower position of the vertical tube on the right side of the U-shaped tube 51 is open, the one-way valve 56 located in the upper position of the vertical tube on the left side of the U-shaped tube 51 is open, and the other one-way valves 56 are closed. This allows the vertical tube on the right side of the U-shaped tube 51 to draw the coolant in the coolant box 4 upward into the suction pipe 52, while the coolant originally stored inside the other suction pipe 52 is discharged upward through the vertical tube on the left side of the U-shaped tube 51. In this cycle, coolant continuously flows into the horizontal pipe on the upper side of the U-shaped tube 51, and is transported to the inlet tank 61 through the inlet cylinder 67. Finally, it is transported to the inside of the annular pipe 65 through the inlet pipe 63. After flowing through the annular pipe 65, it flows into the inside of the drain tank 62 through the drain pipe 64. The coolant flowing inside the annular pipe 65 carries away the heat from the outside of the lithium battery 3, and the coolant inside the drain tank 62 finally returns to the coolant frame 4 through the drain cylinder 68.

[0037] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0038] It should be understood that the disclosed apparatus can be implemented in other ways, as illustrated in the embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A thermal management device for a new energy vehicle battery, characterized in that, include: Battery box (1), with a support platform (9) for supporting and installing lithium battery (3) inside the battery box (1). Cooling mechanism (6) is provided on the outside of the lithium battery (3); A coolant frame (4) is fixedly installed on the bottom side of the battery box (1); The flow conveying mechanism (5) located on the top of the coolant frame (4) is used to transport the coolant inside the coolant frame (4) to the cooling mechanism (6) for liquid cooling of the lithium battery (3); The air-cooling mechanism (8) is located on one side of the current conveying mechanism (5) and is used to perform air-cooling heat dissipation on the lithium battery (3) and the cooling mechanism (6). The drive mechanism (2) is located at the bottom of the battery box (1); The linkage mechanism (7) connected between the drive mechanism (2) and the air-cooling mechanism (8) can drive the linkage mechanism (7) through the drive mechanism (2), and thus can synchronously drive the air-cooling mechanism (8) and the flow transmission mechanism (5) through the linkage mechanism (7).

2. The new energy vehicle battery thermal management device as described in claim 1, characterized in that, The drive mechanism (2) includes: Two side plates (21) fixed to the bottom of the battery box (1); The outer frame (22) is slidably disposed between the two side plates (21); Rotate the impeller (23) connected to the inner side of the outer frame (22); A lead screw (24) is fixed to the top of the impeller (23); An internally threaded cylinder (25) is threaded onto the outer wall of the lead screw (24), and the internally threaded cylinder (25) rotates through the bottom of the battery box (1); The first bevel gear (26) is fixed to the outer wall of the internal threaded cylinder (25); A second bevel gear (27) is engaged with one side of the internal threaded cylinder (25); A motor (28) is fixedly installed inside the battery box (1) to drive the second bevel gear (27).

3. The new energy vehicle battery thermal management device as described in claim 2, characterized in that, The current conveying mechanism (5) includes: A U-shaped tube (51) is fixedly extended into the coolant frame (4), and two one-way valves (56) are provided on the inner side of the two vertical tubes of the U-shaped tube (51). Two fixedly connected liquid extraction tubes (52) are connected to the U-shaped tube (51), and the connection port between the liquid extraction tube (52) and the U-shaped tube (51) is located between the two one-way valves (56); Two pistons (55) are respectively slidably sleeved inside the two suction tubes (52). The upright plate (53) is fixed to the top of the coolant frame (4); A rocker arm (57) hinged to the top of the coolant frame (4); A turntable (54) is rotatably connected to the outer wall of the upright plate (53). A push column (541) is fixedly connected to the outer wall of the turntable (54). The push column (541) is slidably sleeved in the inner cavity of the swing rod (57). The hanging ring (59) is fixed to the outer wall of the piston (55) and the rocker arm (57). Hooks (58) are used to connect the piston (55) and the hanging ring (59) on the outer wall of the rocker arm (57).

4. The new energy vehicle battery thermal management device as described in claim 3, characterized in that, The cooling mechanism (6) includes: Multiple annular tubes (65) are uniformly sleeved on the outer wall of the lithium battery (3). The liquid inlet tank (61) is located on one side of the lithium battery (3). The liquid inlet tank (61) is fixedly connected to the U-shaped tube (51) through the liquid inlet cylinder (67). Each of the annular tubes (65) is fixedly connected to the liquid inlet tank (61) through multiple liquid inlet pipes (63). A drain tank (62) is provided on the other side of the lithium battery (3). The drain tank (62) is fixedly connected to the coolant frame (4) through a drain cylinder (68). Each of the annular pipes (65) is fixedly connected to the drain tank (62) through multiple drain pipes (64). Multiple fins (66) are fixedly sleeved on the outer wall of the liquid inlet pipe (63) and the liquid outlet pipe (64).

5. A new energy vehicle battery thermal management device as described in claim 4, characterized in that, The linkage mechanism (7) includes: A worm (71) is provided on one side of the outer frame (22), and the worm (71) is coaxially fixed to the impeller (23); Fixing block (73) fixed to the side wall of the outer frame (22); Rotate the worm wheel (72) connected to the bottom of the fixed block (73), and the worm wheel (72) meshes with the worm (71); Rotary connection to the top of the fixed block (73) star-shaped cylinder (75) is slidably passed through the bottom of the battery box (1), and the star-shaped cylinder (75) is fixedly connected to the worm gear (72); A star-shaped shaft (74) is slidably inserted inside the star-shaped cylinder (75), and a third bevel gear (77) is fixedly connected to the top end of the star-shaped shaft (74). A connecting plate (76) is fixed to the side wall of the upright plate (53), and the star-shaped shaft (74) rotates through the interior of the connecting plate (76).

6. A new energy vehicle battery thermal management device as described in claim 5, characterized in that, The air-cooling mechanism (8) includes two fans (81) respectively set on one side of the two vertical tubes of the U-shaped tube (51), and the fans (81) are rotatably connected to the vertical tubes of the U-shaped tube (51) via shafts.

7. A new energy vehicle battery thermal management device as described in claim 6, characterized in that, The air-cooling mechanism (8) also includes a fourth bevel gear (82) that meshes with the third bevel gear (77). The fourth bevel gear (82) is rotatably connected to the outer wall of the vertical plate (53) via a shaft. The turntable (54) is coaxially fixed to the fourth bevel gear (82).

8. A new energy vehicle battery thermal management device as described in claim 7, characterized in that, The fan (81) and the fourth bevel gear (82) are connected by a transmission component (83). The transmission component (83) includes a first sprocket (831) fixed to the shaft of the fan (81) and a second sprocket (833) fixed to the shaft of the fourth bevel gear (82). A chain (832) is connected between the second sprocket (833) and the first sprocket (831).

9. A new energy vehicle battery thermal management device as described in claim 8, characterized in that, The battery box (1) has a filter port (12) on one end wall. A right-angle baffle (11) is fixed to the outer wall of the battery box (1) outside the filter port (12). A flow guide cavity (14) is opened on the inner wall of the other end of the battery box (1). A flow collector frame (13) is fixedly connected inside the flow guide cavity (14). Two branch pipes (15) with solenoid valves are fixedly connected to the outer wall of the flow collector frame (13).

10. A method for thermal management of a new energy vehicle battery, using the thermal management device for a new energy vehicle battery as described in claim 8, characterized in that, Includes the following steps: Step 1: Start the drive mechanism (2), control the motor (28) to work, and lower the lead screw (24) through gear transmission to place the impeller (23) in the airflow generated by the car's movement; Step 2: Using the airflow drive system, the airflow during the car's movement drives the impeller (23) to rotate, and the power is transmitted to the air-cooling mechanism (8) and the flow transmission mechanism (5) through the linkage mechanism (7). Step 3: Perform composite heat dissipation: Air cooling: The linkage mechanism drives the fan (81) to rotate, which forces air cooling on the fins (66) and pipes of the cooling mechanism (6); Liquid cooling: The linkage mechanism (7) simultaneously drives the piston (55) of the flow transmission mechanism (5) to reciprocate, pumping the coolant from the coolant box (4) into the annular pipe (65), taking away the heat of the lithium battery (3), and then flowing back to the coolant box (4) to complete the cycle; Step 4: Heat management and distribution. The heated air is collected through the guide cavity (14) and the rapid flow frame (13) and distributed by the distribution pipe (15) according to demand.

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