Lithium battery heat dissipation equipment for new energy automobile

Abstract

The invention relates to the technical field of new energy, and discloses lithium battery heat dissipation equipment for a new energy automobile, the lithium battery heat dissipation equipment for the new energy automobile comprises a vehicle body, a shell is fixedly mounted at the bottom of the vehicle body, and a bottom plate is fixedly mounted at the bottom of the shell. According to the lithium battery heat dissipation equipment for the new energy automobile, in order to ensure the use safety of a lithium battery, the protection assembly is arranged and matched with the heat sensor to detect the temperature of the lithium battery, and when the temperature is too high, a sound in the automobile body is triggered to prompt a driver; and meanwhile, a servo motor is matched to drive a connecting rod to enable a locking block to pass through a sliding groove in a limiting ring, limiting on a mounting plate and a cutting tool bit is relieved, if the lithium battery body swells, a contact button firstly makes contact with the bottom of the liquid storage bag to remind a driver, and then the cutting tool bit is pushed to cut the bottom of the liquid storage bag in cooperation with the swell generated by the lithium battery body. And the mustard oil mixed liquid in the bag flows out to inhibit fire, and emits peculiar smell to warn a driver again.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy, and specifically relates to a lithium battery heat dissipation device for new energy vehicles. Background Technique

[0002] The lithium battery heat dissipation device for new energy vehicles plays a crucial role in the thermal management of electric vehicles. Its main function and purpose are to maintain the temperature stability of the lithium battery pack during operation, ensuring battery performance and safety.

[0003] The lithium battery heat dissipation device for new energy vehicles usually adopts a liquid cooling heat dissipation system, whose structure includes key components such as coolant pipes, water pumps, and heat exchangers. The working process is as follows: Under the action of the water pump, the coolant flows through the pipes around the battery pack, absorbs the heat generated by the battery, and then is cooled by the heat exchanger and recycled. This heat dissipation method has the advantages of high cooling efficiency and precise temperature control, and can effectively reduce the battery temperature and improve the consistency of the temperature field of the battery pack.

[0004] However, in the actual use process of the above-mentioned device, traditional devices often do not have effective early warning and suppression measures for the risk of lithium battery fire. When the lithium battery temperature is too high or even catches fire, it is impossible to timely warn the driver and take fire extinguishing measures, posing a great safety hazard. In view of this, we have proposed a lithium battery heat dissipation device for new energy vehicles. Summary of the Invention

[0005] The purpose of the present invention is to provide a lithium battery heat dissipation device for new energy vehicles to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A lithium battery heat dissipation device for new energy vehicles, including a vehicle body. A housing is fixedly installed at the bottom of the vehicle body, a bottom plate is fixedly installed at the bottom of the housing, an inner housing is fixedly installed on the housing, a cover plate is fixedly installed above the inner housing, and a protection component is arranged on the housing. The protection component includes:

[0008] A heat insulation cavity. A heat insulation cavity is arranged between the housing and the inner housing. A lithium battery body is fixedly installed inside the inner housing, a long filter plate is fixedly installed inside the inner housing, a circular groove is opened on the lithium battery body, one end of a pull spring rod is fixedly installed on the long filter plate, and the other end of the pull spring rod is fixedly installed on one end of a mounting plate;

[0009] Support frame, one end of the mounting plate is fixedly installed with one end of the support frame, the other end of the support frame is fixedly installed with a cutting tool head, the center point above the mounting plate is fixedly installed with one end of a cylinder, the other end of the cylinder is fixedly installed with a contact button, one end of a spiral spring is fixedly installed inside the cylinder, and the other end of the spiral spring is fixedly installed with one end of a heat sensor;

[0010] Servo motor, a servo motor is fixedly installed on the long filter plate, one end of a connecting rod is fixedly installed at the output end of the servo motor, the other end of the connecting rod is fixedly installed with a locking block, a limiting groove is provided on the support frame, a limiting ring is fixedly installed on the support frame, and a liquid storage bag is fixedly installed inside the inner shell.

[0011] Preferably, the long filter plate is arranged at the bottom of the lithium battery body, the other end of the heat sensor is attached to the lithium battery body, the pull spring rod is arranged inside the circular groove, the cutting tool head is arranged at the bottom of the liquid storage bag, the limiting ring is arranged inside the limiting groove, a sliding groove is provided on the limiting ring, the locking block is arranged inside, and the servo motor and the connecting rod are arranged inside the pull spring rod.

[0012] Preferably, the heat insulation cavity is filled with heat insulation liquid, which is composed of 50% - 80% water, 5% - 20% nano-ceramic particles, 3% - 15% aerogel particles and 0.5% - 3% dispersant. The liquid storage bag is filled with a mustard oil mixture, which is composed of 5% - 10% mustard oil, 80% - 90% water, 3% - 8% surfactant and 2% - 5% flame retardant. The periphery and top of the liquid storage bag are made of rubber, and the bottom of the liquid storage bag is made of low-density polyethylene.

[0013] Preferably, a heat insulation component is arranged on the outer shell. The heat insulation component includes a partition plate. The partition plate is fixedly installed inside the outer shell. A driving motor is fixedly installed on the outer shell. One end of a short rod is fixedly installed at the output end of the driving motor. A large gear is fixedly installed on the short rod. A round rod is rotatably installed on the partition plate. A small gear is fixedly installed on the round rod. A turbine is fixedly installed on the round rod. A long rod is rotatably installed inside the outer shell. A stirring plate is fixedly installed on the long rod. A transmission module is arranged between the long rod and the round rod. An isolation cylinder is fixedly installed inside the outer shell.

[0014] Preferably, there are multiple groups of the round rod, small gear, turbine, long rod, stirring plate, transmission module and isolation cylinder. The partition plate is arranged inside the heat insulation cavity. The large gear meshes with multiple groups of small gears. The transmission module is composed of two groups of transmission sprockets and one group of transmission chains. The positive and negative electrodes of the lithium battery body are arranged inside the isolation cylinder.

[0015] Preferably, a ventilation component is provided on the bottom plate. The ventilation component includes an installation groove, an installation groove is formed on the bottom plate, an obliquely flattened groove is formed on the bottom plate, a guiding groove is formed on the bottom plate, a long groove is formed on the bottom plate, a connection box is fixedly installed at the bottom of the bottom plate, a round hole is formed in the connection box, an arc-shaped plate is fixedly installed inside the connection box, a square filter plate is fixedly installed on the bottom plate, a connection groove is formed in the square filter plate, a dense-hole plate is fixedly installed on the bottom plate, an annular air guide plate is fixedly installed at the bottom of the bottom plate, and a square pipe is fixedly installed at the bottom of the inner shell.

[0016] Preferably, multiple groups of the obliquely flattened groove, guiding groove, long groove, round hole, connection groove, annular air guide plate and square pipe are provided, and the internal spaces of the obliquely flattened groove, guiding groove, long groove, connection box and connection groove communicate with each other.

[0017] Preferably, the square filter plate is arranged inside the installation groove, the connection box is arranged at the bottom of the long groove, the dense-hole plate is arranged inside the long groove, one end of the obliquely flattened groove is arranged inside the installation groove, the other end of the obliquely flattened groove is arranged inside the annular air guide plate, the internal space of the square pipe communicates with the internal space of the heat insulation cavity, and the square pipe is arranged at the bottom of the long filter plate.

[0018] Preferably, a triggering component is provided on the installation plate. The triggering component includes a square plate, a square plate is fixedly installed on the installation plate, one end of a bimetallic spring piece is fixedly installed on the square plate, the other end of the bimetallic spring piece is fixedly installed on the outer wall of the support frame, a triggering button is arranged at the bottom of the cutting tool head, a vertical groove is formed in the lithium battery body, and one end of a hydraulic device is fixedly installed on the long filter plate.

[0019] Preferably, multiple groups of the square plate, bimetallic spring piece, triggering button, vertical groove and hydraulic device are provided. The hydraulic device is arranged inside the vertical groove, the piston end of the hydraulic device is arranged at the bottom of the installation plate, and the triggering button is arranged above the bimetallic spring piece.

[0020] Compared with the prior art, the present invention provides a lithium battery heat dissipation device for new energy vehicles, which has the following beneficial effects:

[0021] 1. For the lithium battery heat dissipation device for new energy vehicles, in order to ensure the safe use of the lithium battery by this device, a protection component is provided. This component cooperates with a heat sensor to detect the temperature of the lithium battery. When the temperature is too high, it triggers an audio in the vehicle body to prompt the driver. At the same time, it cooperates with a servo motor to drive a connecting rod to make a locking block pass through a sliding groove on a limit ring, releasing the limit on the installation plate and the cutting tool head. If the lithium battery body bulges, the contact button first contacts the bottom of the liquid storage bag to prompt the driver. Then, it cooperates with the bulge generated by the lithium battery body to push the cutting tool head to cut the bottom of the liquid storage bag, so that the mustard oil mixed liquid in the bag flows out to inhibit fire and emits an odor to warn the driver again.

[0022] 2. For the lithium - battery heat - dissipation device used in new - energy vehicles, in order to further extend the service life of the lithium battery, an insulation component is provided. This component, in cooperation with the partition inside the outer shell, divides the insulation cavity. The driving motor drives the short rod and the large gear to rotate. The large gear meshes with multiple small gears. Through a transmission module composed of two transmission sprockets and a transmission chain, the round rod and the long rod are driven to rotate. The turbine on the round rod promotes the flow of the liquid in the insulation cavity, and the stirring plate on the long rod stirs the liquid in all directions, making the water - based insulation liquid more evenly distributed and the heat transfer more balanced, effectively improving the insulation effect of the insulation cavity.

[0023] 3. For the lithium - battery heat - dissipation device used in new - energy vehicles, in order to further ensure that the lithium battery works at an appropriate temperature, a ventilation component is provided. When the vehicle body is moving, this component, in cooperation with the vehicle body, guides the airflow into the flat - inclined groove through the annular air - guiding plate. The flat - inclined groove, the guiding groove, the long groove, the connection box, and the connection groove are interconnected, enabling the airflow to circulate inside the outer shell to take away heat. The square filter plate in the installation groove and the dense - hole plate in the long groove block dust and impurities from entering, preventing them from affecting the heat - dissipation effect or causing damage to the device. Multiple flat - inclined grooves, guiding grooves and other structures work together, expanding the ventilation area and improving the heat - dissipation efficiency, providing a stable operating environment for the lithium - battery heat - dissipation device and ensuring that the lithium battery works at an appropriate temperature.

[0024] 4. For the lithium - battery heat - dissipation device used in new - energy vehicles, in order to further enhance the reliability of the heat - dissipation device in dealing with emergencies, a trigger component is provided. This component, in cooperation with the square plate on the mounting plate, fixes the bimetallic spring piece. When the temperature of the lithium - battery body is too high and close to the self - ignition point and the heat sensor is damaged, the bimetallic spring piece deforms due to heat, triggering the trigger button below. The trigger button activates the hydraulic device in the vertical groove. The piston end of the hydraulic device pushes the mounting plate and the cutting tool head, forcibly breaking the restriction of the limit ring and the locking block, directly cutting through the liquid - storage bag, and releasing the mustard - oil mixture to inhibit the lithium - battery fire. Multiple square plates, bimetallic spring pieces, etc. work together, providing double protection for the safety of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic bottom - view of the overall structure of the present invention;

[0026] Figure 2 It is a schematic bottom - view of a partial structure of the present invention;

[0027] Figure 3 It is a schematic top - view of a partial structure of the present invention;

[0028] Figure 4 It is a schematic side - bottom - view of a partial structure of the present invention;

[0029] Figure 5 It is a schematic top - view sectional view of a partial structure of the present invention;

[0030] Figure 6 It is a schematic cross-sectional view of part of the structure of the present invention;

[0031] Figure 7 It is a schematic cross-sectional view of part of the structure of the heat insulation component of the present invention;

[0032] Figure 8 It is an exploded schematic view of part of the structure of the present invention;

[0033] Figure 9 For the present invention Figure 8 Schematic enlarged view of the structure of area A therein;

[0034] Figure 10 It is a schematic side cross-sectional view of part of the structure of the present invention;

[0035] Figure 11 For the present invention Figure 10 Schematic enlarged view of the structure of area B therein;

[0036] Figure 12 For the present invention Figure 10 Schematic enlarged view of the structure of area C therein;

[0037] Figure 13 It is a schematic cross-sectional view of part of the structure of the protection component of the present invention;

[0038] Figure 14 It is a schematic top view of part of the structure of the ventilation component of the present invention;

[0039] Figure 15 It is a schematic cross-sectional view of part of the structure of the ventilation component of the present invention.

[0040] In the figure: 1. Vehicle body; 2. Outer shell; 3. Bottom plate; 4. Inner shell; 5. Cover plate; 6. Protection component; 61. Heat insulation cavity; 62. Lithium battery body; 63. Long filter plate; 64. Round groove; 65. Tension spring rod; 66. Mounting plate; 67. Support frame; 68. Cutting tool head; 69. Cylinder; 610. Contact button; 611. Helical spring; 612. Heat sensor; 613. Servo motor; 614. Connecting rod; 615. Locking block; 616. Limit ring; 617. Liquid storage bag; 618. Limit groove; 7. Heat insulation component; 71. Partition board; 72. Driving motor; 73. Short rod; 74. Large gear; 75. Round rod; 76. Small gear; 77. Turbine; 78. Long rod; 79. Stirring plate; 710. Transmission module; 711. Isolation cylinder; 8. Ventilation component; 81. Mounting groove; 82. Flat inclined groove; 83. Guide groove; 84. Long groove; 85. Connection box; 86. Round hole; 87. Arc-shaped plate; 88. Square filter plate; 89. Connection groove; 810. Dense hole plate; 811. Annular air guide plate; 812. Square pipe; 9. Trigger component; 91. Square plate; 92. Bimetallic spring piece; 93. Trigger button; 94. Vertical groove; 95. Hydraulic device. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In this application, the orientation or positional relationship indicated by the term "upper" is based on the orientation or positional relationship shown in the accompanying drawings. It is mainly for better describing this application and its embodiments, and is not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. And, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific situations.

[0043] Please refer to Figure 1 - Figure 15 , the present invention provides a technical solution:

[0044] A heat dissipation device for a lithium battery used in a new energy vehicle, including a vehicle body 1, an outer shell 2 is fixedly installed at the bottom of the vehicle body 1, a bottom plate 3 is fixedly installed at the bottom of the outer shell 2, an inner shell 4 is fixedly installed on the outer shell 2, and a cover plate 5 is fixedly installed above the inner shell 4.

[0045] In an embodiment of the present invention, a protection component 6 is provided on the outer shell 2. The protection component 6 includes a heat insulation cavity 61. A heat insulation cavity 61 is provided between the outer shell 2 and the inner shell 4. A lithium battery body 62 is fixedly installed inside the inner shell 4. A long filter plate 63 is fixedly installed inside the inner shell 4. A circular groove 64 is formed on the lithium battery body 62. One end of a tension spring rod 65 is fixedly installed on the long filter plate 63. The other end of the tension spring rod 65 is fixedly installed on one end of a mounting plate 66. The other end of the mounting plate 66 is fixedly installed on one end of a support frame 67. The other end of the support frame 67 is fixedly installed with a cutting tool head 68. The center point above the mounting plate 66 is fixedly installed with one end of a cylinder 69. The other end of the cylinder 69 is fixedly installed with a contact button 610. One end of a spiral spring 611 is fixedly installed inside the cylinder 69. The other end of the spiral spring 611 is fixedly installed with one end of a heat sensor 612. A servo motor 613 is fixedly installed on the long filter plate 63. One end of a connecting rod 614 is fixedly installed at the output end of the servo motor 613. The other end of the connecting rod 614 is fixedly installed with a locking block 615. A limiting groove 618 is formed on the support frame 67. A limiting ring 616 is fixedly installed on the support frame 67. A liquid storage bag 617 is fixedly installed inside the inner shell 4. The long filter plate 63 is arranged at the bottom of the lithium battery body 62. The other end of the heat sensor 612 is attached to the lithium battery body 62. The tension spring rod 65 is arranged inside the circular groove 64. The cutting tool head 68 is arranged at the bottom of the liquid storage bag 617. The limiting ring 616 is arranged inside the limiting groove 618. A sliding groove is formed on the limiting ring 616. The locking block 615 is arranged inside. The servo motor 613 and the connecting rod 614 are arranged inside the tension spring rod 65. The heat insulation cavity 61 is filled with a heat insulation liquid. The water in the heat insulation liquid accounts for 50% - 80%. Relying on the high specific heat capacity characteristic of water, it can absorb a large amount of heat. The nano-ceramic particles account for 5% - 20%. It has excellent heat insulation performance and can effectively block heat conduction. The aerogel particles account for 3% - 15%. The extremely low thermal conductivity of the aerogel further enhances the heat insulation effect. The dispersant accounts for 0.5% - 3%. It can ensure that the nano-ceramic particles and the aerogel particles are evenly dispersed in water. The liquid storage bag 617 is filled with a mustard oil mixture. The mustard oil mixture is composed of 5% - 10% mustard oil, 80% - 90% water, 3% - 8% surfactant and 2% - 5% flame retardant. Mustard oil has a strong smell and can play a warning role when leaking. Water is the main component, and it cooperates with the flame retardant to enhance the fire extinguishing effect. The surfactant helps the mixture to be uniform and stable. The periphery and top of the liquid storage bag 617 are made of rubber. The bottom of the liquid storage bag 617 is made of low-density polyethylene.

[0046] When this embodiment is in use, when the vehicle is driving normally and the temperature of the lithium battery body 62 is in the normal range, generally 25°C - 45°C, each component of the protection component 6 is in the initial state. The heat insulation liquid filled in the heat insulation cavity 61 can stably block the heat transfer between the outer shell 2 and the inner shell 4. The long filter plate 63 is made of high-temperature resistant and corrosion-resistant materials and is fixed at the bottom of the inner shell 4 to provide support for the upper structure. The spiral spring 611 is inside the cylinder 69. The spiral spring 611 pushes the heat sensor 612 to make it closely fit the lithium battery body 62, always ready to detect the temperature change of the lithium battery body 62. The heat sensor 612 uses a high-precision thermistor element, which can accurately sense the temperature change, and the error can be controlled within ±0.5°C. The servo motor 613 is in a stationary state. The locking block 615 on the connecting rod 614 limits the mounting plate 66 and the cutting tool head 68 through the limiting ring 616 to keep them in the initial position and ensure the stability of the whole structure. When the temperature of the lithium battery body 62 gradually rises, the thermistor in the heat sensor 612 changes its resistance value with the temperature change. The resistance change is converted into a voltage signal through a Wheatstone bridge circuit. This signal is amplified by a signal amplifier and then transmitted to the control system in the vehicle body 1. The temperature threshold set in the control system is 60°C. If the temperature exceeds this set normal range, the control system immediately triggers the audio module in the vehicle body 1, and the audio emits a warning sound to warn the driver of the too high temperature and remind the driver. As the temperature of the lithium battery body 62 continues to rise, when the temperature reaches the range of 70°C - 90°C, the lithium battery may bulge. When the lithium battery body 62 bulges, its top will gradually approach the bottom of the liquid storage bag 617. The contact button 610 above the mounting plate 66 adopts a microswitch design with high sensitivity. When the contact button 610 contacts the bottom of the liquid storage bag 617, the microswitch closes, the circuit is turned on, and an electrical signal is generated. This signal is transmitted to the control system in the vehicle body 1 through a wire. After receiving the signal, the control system immediately starts the warning light in the vehicle to flash and emits a warning sound with a different frequency through the audio module again to warn the driver again that the lithium battery is abnormal and there may be a risk of fire. If the temperature of the lithium battery body 62 continues to rise and exceeds 100°C, the bulge further intensifies, pushing the mounting plate 66 to move upward against the pulling force of the tension spring rod 65. At this time, the control system issues an instruction to the driver of the servo motor 613 to drive the servo motor 613 to start. The output end of the servo motor 613 drives the connecting rod 614 to rotate. The locking block 615 on the connecting rod 614 moves through the chute on the limiting ring 616 to release the limit on the mounting plate 66 and the cutting tool head 68. The mounting plate 66 is continuously pushed by the bulge of the lithium battery body 62, driving the cutting tool head 68 to rise and cut the bottom of the liquid storage bag 617. Since the bottom of the liquid storage bag 617 is made of low-density polyethylene and its anti-cutting strength is relatively low, it is cut by the cutting tool head 68.When the mustard oil mixture in the liquid storage bag 617 flows out, the flame retardant in the mixture can decompose at high temperatures to generate inert gases, inhibiting the possible occurrence of fire. At the same time, the strong peculiar smell emitted by the mustard oil can alert the driver again, prompting the driver to take corresponding measures, such as stopping for inspection, etc., to ensure the safe use of the lithium battery.

[0047] In an embodiment of the present invention, a heat insulation component 7 is provided on the outer shell 2. The heat insulation component 7 includes a partition plate 71 which is fixedly installed on the inner side of the outer shell 2. A driving motor 72 is fixedly installed on the outer shell 2. A short rod 73 is fixedly installed at the output end of the driving motor 72. A large gear 74 is fixedly installed on the short rod 73. A round rod 75 is rotatably installed on the partition plate 71. A small gear 76 is fixedly installed on the round rod 75. A turbine 77 is fixedly installed on the round rod 75. A long rod 78 is rotatably installed on the inner side of the outer shell 2. A stirring plate 79 is fixedly installed on the long rod 78. A transmission module 710 is provided between the long rod 78 and the round rod 75. A separation cylinder 711 is fixedly installed on the inner side of the outer shell 2. The round rod 75, the small gear 76, the turbine 77, the long rod 78, the stirring plate 79, the transmission module 710 and the separation cylinder 711 are provided in multiple groups. The partition plate 71 is arranged inside the heat insulation cavity 61. The large gear 74 meshes with multiple groups of small gears 76. The transmission module 710 is composed of two groups of transmission sprockets and one group of transmission chains. The positive and negative electrodes of the lithium battery body 62 are arranged inside the separation cylinder 711.

[0048] During the use of this embodiment, when the vehicle travels for a long time or the temperature of the lithium battery body 62 has a rising trend, such as when the temperature reaches 40°C - 45°C, the driving motor 72 is started. The output end of the driving motor 72 drives the short rod 73 to rotate. The short rod 73 and the output shaft of the driving motor 72 are connected by a key to ensure stable transmission. The large gear 74 on the short rod 73 rotates accordingly. Since the large gear 74 meshes with multiple groups of small gears 76, the large gear 74 drives multiple groups of small gears 76 to rotate at a high speed at a lower speed. The small gear 76 is fixed on the round rod 75, and the round rod 75 starts to rotate. The turbine 77 on the round rod 75 also rotates synchronously. When the turbine 77 rotates inside the heat insulation cavity 61, it can efficiently promote the flow of the water-based heat insulation liquid in the heat insulation cavity 61, accelerating heat transfer. At the same time, the rotation of the round rod 75 drives the long rod 78 to rotate through the transmission module 710. The stirring plate 79 fixed on the long rod 78 stirs the water-based heat insulation liquid in all directions inside the heat insulation cavity 61, enabling the water-based heat insulation liquid to be more evenly distributed and the heat transfer to be more balanced, effectively improving the heat insulation effect of the heat insulation cavity 61, maintaining a stable working environment temperature for the lithium battery, and extending the service life of the lithium battery.

[0049] In an embodiment of the present invention, a ventilation component 8 is provided on the bottom plate 3. The ventilation component 8 includes an installation groove 81, an installation groove 81 is formed on the bottom plate 3, an obliquely flattened groove 82 is formed on the bottom plate 3, a guiding groove 83 is formed on the bottom plate 3, a long groove 84 is formed on the bottom plate 3, a connection box 85 is fixedly installed at the bottom of the bottom plate 3, a round hole 86 is formed on the connection box 85, an arc-shaped plate 87 is fixedly installed inside the connection box 85, a square filter plate 88 is fixedly installed on the bottom plate 3, a connection groove 89 is formed on the square filter plate 88, a dense-hole plate 810 is fixedly installed on the bottom plate 3, an annular air guide plate 811 is fixedly installed at the bottom of the bottom plate 3, a square pipe 812 is fixedly installed at the bottom of the inner shell 4. Multiple groups of the obliquely flattened groove 82, the guiding groove 83, the long groove 84, the round hole 86, the connection groove 89, the annular air guide plate 811 and the square pipe 812 are provided. The internal spaces of the obliquely flattened groove 82, the guiding groove 83, the long groove 84, the connection box 85 and the connection groove 89 are interconnected. The square filter plate 88 is arranged inside the installation groove 81, the connection box 85 is arranged at the bottom of the long groove 84, the dense-hole plate 810 is arranged inside the long groove 84, one end of the obliquely flattened groove 82 is arranged inside the installation groove 81, the other end of the obliquely flattened groove 82 is arranged inside the annular air guide plate 811, the internal space of the square pipe 812 is interconnected with the internal space of the heat insulation cavity 61, and the square pipe 812 is arranged at the bottom of the long filter plate 63.

[0050] When in use of this embodiment, when the vehicle is running, the outside air flow is guided by the annular air guide plate 811 and enters the obliquely flattened groove 82. The shape and angle of the annular air guide plate 811 are optimized through wind tunnel tests and can efficiently guide the air flow. Since the internal spaces of the obliquely flattened groove 82, the guiding groove 83, the long groove 84, the connection box 85 and the connection groove 89 are interconnected, the air flow circulates in these channels, passes around the inner shell 4, and takes away the heat generated by the lithium battery body 62. The square filter plate 88 in the installation groove 81 and the dense-hole plate 810 in the long groove 84 continuously block the entry of dust and impurities. Multiple groups of structures such as the obliquely flattened groove 82 and the guiding groove 83 work together, expanding the ventilation area and improving the heat dissipation efficiency. The temperature of the lithium battery body 62 can be reduced, providing a stable operating environment for the lithium battery heat dissipation device and ensuring that the lithium battery works at an appropriate temperature.

[0051] In an embodiment of the present invention, a triggering component 9 is provided on the mounting plate 66. The triggering component 9 includes a square plate 91, the square plate 91 is fixedly installed on the mounting plate 66, one end of a bimetallic spring piece 92 is fixedly installed on the square plate 91, the other end of the bimetallic spring piece 92 is fixedly installed on the outer wall of the support frame 67, a triggering button 93 is arranged at the bottom of the cutting tool head 68, a vertical groove 94 is formed on the lithium battery body 62, one end of a hydraulic device 95 is fixedly installed on the long filter plate 63. Multiple groups of the square plate 91, the bimetallic spring piece 92, the triggering button 93, the vertical groove 94 and the hydraulic device 95 are provided. The hydraulic device 95 is arranged inside the vertical groove 94, the piston end of the hydraulic device 95 is arranged at the bottom of the mounting plate 66, and the triggering button 93 is arranged above the bimetallic spring piece 92.

[0052] During the use of this embodiment, when the temperature of the lithium battery body 62 is normal, the square plate 91 of the triggering component 9 is fixed on the mounting plate 66. One end of the bimetallic spring piece 92 is fixed on the square plate 91, and the other end is connected to the outer wall of the support frame 67, being in a natural state. The bimetallic spring piece 92 is made by bonding two metals with different coefficients of thermal expansion through a special process. The trigger button 93 is located above the bimetallic spring piece 92 and adopts a highly sensitive pressure trigger switch, which is not triggered. One end of the hydraulic device 95 is fixed on the long filter plate 63 and is located inside the vertical groove 94, and the piston end is in the initial position without pushing the mounting plate 66. When the temperature of the lithium battery body 62 is too high and approaches the self-ignition point, the temperature exceeds 150 °C, and the heat sensor 612 is damaged and cannot work properly, the bimetallic spring piece 92 deforms due to heat. As the temperature rises, due to the different degrees of expansion of the two metals, the bimetallic spring piece 92 bends and deforms. When the bimetallic spring piece 92 deforms to a certain extent, it squeezes the trigger button 93, and the trigger button 93 activates the hydraulic device 95 in the vertical groove 94. The piston end of the hydraulic device 95 extends, pushing the mounting plate 66 and the cutting head 68 upward to forcibly break the restriction of the limiting ring 616 and the locking block 615, directly cutting through the liquid storage bag 617 to release the mustard oil mixture to inhibit the lithium battery from catching fire.

[0053] Among them, the contact button 610, the heat sensor 612, the trigger button 93 and the lithium battery body 62 are electrically connected, and the contact button 610, the heat sensor 612 and the trigger button 93 are conventional known devices that can control the servo motor 613 and the drive motor 72. The standard parts used in this application document can all be purchased from the market. The specific connection methods of each part all adopt conventional means such as riveting and welding in the prior art for connection, and the machines, parts and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, no specific description will be made here.

[0054] The above has generally described the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements made without departing from the spirit of the present invention are all within the protection scope of the present invention.

Claims

1. A lithium battery heat dissipation device for a new energy vehicle, comprising a vehicle body (1), a housing (2) fixedly mounted on the bottom of the vehicle body (1), a bottom plate (3) fixedly mounted on the bottom of the housing (2), an inner housing (4) fixedly mounted on the housing (2), a cover plate (5) fixedly mounted above the inner housing (4), characterized in that: The housing (2) is provided with a protection component (6), and the protection component (6) comprises: A heat-insulating cavity (61), wherein the heat-insulating cavity (61) is arranged between the outer shell (2) and the inner shell (4), a lithium battery body (62) is fixedly installed inside the inner shell (4), a long filter plate (63) is fixedly installed inside the inner shell (4), a circular groove (64) is provided on the lithium battery body (62), one end of a tension spring rod (65) is fixedly installed on the long filter plate (63), and one end of a mounting plate (66) is fixedly installed on the other end of the tension spring rod (65); A support frame (67), one end of the support frame (67) is fixedly mounted on the other end of the mounting plate (66), a cutting head (68) is fixedly mounted on the other end of the support frame (67), one end of a cylinder (69) is fixedly mounted on the center point above the mounting plate (66), a contact button (610) is fixedly mounted on the other end of the cylinder (69), one end of a coil spring (611) is fixedly mounted inside the cylinder (69), and one end of a heat sensor (612) is fixedly mounted on the other end of the coil spring (611); A servo motor (613) is fixedly mounted on the long filter plate (63), one end of a connecting rod (614) is fixedly mounted on the output end of the servo motor (613), a locking block (615) is fixedly mounted on the other end of the connecting rod (614), a limiting groove (618) is provided on the support frame (67), a limiting ring (616) is fixedly mounted on the support frame (67), and a liquid storage bag (617) is fixedly mounted inside the inner shell (4).

2. A lithium battery heat dissipation device for new energy vehicles according to claim 1, characterized in that: The long filter plate (63) is arranged at the bottom of the lithium battery body (62), the other end of the heat sensor (612) is attached to the lithium battery body (62), the tension spring rod (65) is arranged on the inner side of the circular groove (64), the cutting blade (68) is arranged on the bottom of the liquid storage bag (617), the limiting ring (616) is arranged on the inner side of the limiting groove (618), a sliding groove is opened on the limiting ring (616), the locking block (615) is arranged on the inner side, and the servo motor (613) and the connecting rod (614) are arranged on the inner side of the tension spring rod (65).

3. The lithium battery heat dissipation device for new energy vehicles according to claim 1, characterized in that: The heat insulation cavity (61) is filled with a heat insulation liquid, which is a mixture of liquid water, nano-ceramic particles, aerogel particles and a dispersant. The liquid storage bag (617) is filled with a mustard oil mixture, which is a mixture of mustard oil, water, a surfactant and a flame retardant. The surroundings and the top of the liquid storage bag (617) are made of rubber, and the bottom of the liquid storage bag (617) is made of low-density polyethylene.

4. The lithium battery heat dissipation device for new energy vehicles according to claim 1, characterized in that: The outer shell (2) is provided with a heat insulation component (7), the heat insulation component (7) comprising a partition (71), the partition (71) being fixedly mounted on the inner side of the outer shell (2), a drive motor (72) being fixedly mounted on the outer shell (2), a short rod (73) being fixedly mounted on the output end of the drive motor (72), a large gear (74) being fixedly mounted on the short rod (73), a round rod (75) being rotatably mounted on the partition (71), a small gear (76) being fixedly mounted on the round rod (75), a turbine (77) being fixedly mounted on the round rod (75), a long rod (78) being rotatably mounted on the inner side of the outer shell (2), a stirring plate (79) being fixedly mounted on the long rod (78), a transmission module (710) being arranged between the long rod (78) and the round rod (75), and an isolation cylinder (711) being fixedly mounted on the inner side of the outer shell (2).

5. A lithium battery heat dissipation device for new energy vehicles according to claim 4, characterized in that: The round rod (75), the small gear (76), the turbine (77), the long rod (78), the stirring plate (79), the transmission module (710) and the isolation cylinder (711) are provided in multiple groups, the partition plate (71) is arranged inside the heat insulation cavity (61), and the large gear (74) is meshed with multiple groups of small gears (76).

6. The lithium battery heat dissipation device for new energy vehicles according to claim 1, characterized in that: The bottom plate (3) is provided with a ventilation assembly (8), the ventilation assembly (8) comprising a mounting groove (81), the bottom plate (3) having a mounting groove (81), the bottom plate (3) having a flat oblique groove (82), the bottom plate (3) having a guide groove (83), the bottom plate (3) having a long groove (84), a connection box (85) fixedly mounted at the bottom of the bottom plate (3), the connection box (85) having a round hole (86), an arc-shaped plate (87) fixedly mounted inside the connection box (85), a square filter plate (88) fixedly mounted on the bottom plate (3), the square filter plate (88) having a connecting groove (89), a dense hole plate (810) fixedly mounted on the bottom plate (3), an annular air guide plate (811) fixedly mounted at the bottom of the bottom plate (3), and a square tube (812) fixedly mounted at the bottom of the inner shell (4).

7. A lithium battery heat dissipation device for new energy vehicles according to claim 6, characterized in that: The flat oblique groove (82), the guide groove (83), the long groove (84), the circular hole (86), the connecting groove (89), the annular air guide plate (811) and the square tube (812) are provided in multiple groups, and the internal spaces of the flat oblique groove (82), the guide groove (83), the long groove (84), the connecting box (85) and the connecting groove (89) are connected.

8. The lithium battery heat dissipation device for new energy vehicles according to claim 6, characterized in that: The square filter plate (88) is arranged on the inner side of the mounting groove (81), the connection box (85) is arranged on the bottom of the long groove (84), the dense hole plate (810) is arranged on the inner side of the long groove (84), one end of the flat inclined groove (82) is arranged on the inner side of the mounting groove (81), and the other end of the flat inclined groove (82) is arranged on the inner side of the annular air guide plate (811), the inner space of the square tube (812) is communicated with the inner space of the heat insulation cavity (61), and the square tube (812) is arranged on the bottom of the long filter plate (63).

9. The lithium battery heat dissipation device for new energy vehicles according to claim 1, characterized in that: A trigger assembly (9) is arranged on the mounting plate (66), and the trigger assembly (9) comprises a square plate (91). The square plate (91) is fixedly mounted on the mounting plate (66), one end of a bimetallic spring sheet (92) is fixedly mounted on the square plate (91), and the other end of the bimetallic spring sheet (92) is fixedly mounted on the outer wall of the support frame (67). A trigger button (93) is arranged at the bottom of the cutting head (68), a vertical groove (94) is provided on the lithium battery body (62), and one end of a hydraulic device (95) is fixedly mounted on the long filter plate (63).

10. A lithium battery heat dissipation device for new energy vehicles according to claim 9, characterized in that: The square plate (91), the bimetallic spring sheet (92), the trigger button (93), the vertical groove (94) and the hydraulic device (95) are provided in multiple groups. The hydraulic device (95) is provided inside the vertical groove (94). The piston end of the hydraulic device (95) is provided at the bottom of the mounting plate (66). The trigger button (93) is provided above the bimetallic spring sheet (92).

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