New energy automobile battery heat dissipation device

Abstract

The invention relates to the technical field of new energy automobile batteries, in particular to a new energy automobile battery heat dissipation device.A fire extinguishing assembly comprises a material box fixed in a heat dissipation bin, sliding grooves are formed in the top and the bottom of the material box, a supporting frame is slidably connected to the interior of the material box along the sliding grooves, and a first air bag is fixed in the supporting frame; the material box is slidably connected with an ejector rod, a conventional magnet is fixed to the end, located outside the material box, of the ejector rod, and in the fire extinguishing state, the second wheel repeatedly rubs with the first wheel to generate high temperature when rotating highly, and the high temperature is transmitted into the material box through a hollow pipe to rapidly preheat guanidine nitrate; according to the preheating purpose, guanidine nitrate can be rapidly heated, oxidized and reduced to generate nitrogen in the battery cell bin, oxygen in air is diluted or exhausted through the nitrogen in the two air bags and the nitrogen generated through guanidine nitrate oxidation and reduction, so that the concentration of oxygen around a battery fire source is reduced, oxygen needed by combustion is insufficient, and flames are extinguished.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy automobile battery technology, and particularly relates to a new energy automobile battery heat dissipation device. BACKGROUND

[0002] New energy vehicles are a key strategic industry for addressing global climate change, environmental pollution and energy crisis. Its core driving force lies in breaking away from dependence on traditional fuels, using clean energy, and ultimately achieving zero or low emissions in the transportation sector. Batteries are the "heart" of new energy vehicles.

[0003] In current new energy vehicles, the heat dissipation and fire extinguishing functions of the automobile battery are independent of each other, which has significant defects: the traditional heat dissipation fan is only used for temperature control, while the fire extinguishing system (such as vehicle-mounted aerosol or dry powder extinguishing agent) is usually triggered passively outside the battery, resulting in delayed response and difficulty for the extinguishing agent to penetrate into the internal battery cells, low extinguishing efficiency, lack of heat dissipation-fire extinguishing synergy mechanism, and inability to simultaneously suppress the fire source and block the oxygen supply in the early stage of battery self-ignition. Therefore, a new heat dissipation structure is urgently needed to deeply integrate the battery heat dissipation and internal fire extinguishing functions, achieving rapid and accurate flame suppression. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art and provide a new energy automobile battery heat dissipation device.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a new energy automobile battery heat dissipation device, comprising: an outer shell, the inside of the outer shell is provided with a heat dissipation and fire extinguishing structure, the inside of the outer shell is divided into a battery cell compartment and a heat dissipation compartment by a partition, and the heat dissipation and fire extinguishing structure is located inside the heat dissipation compartment, the heat dissipation and fire extinguishing structure comprises two support columns fixed inside the heat dissipation compartment, the inside of the support column is rotatably connected with a rotating shaft, the two ends of the rotating shaft are respectively a regular fan blade and a special-shaped fan blade, the outside of the rotating shaft is provided with a worm gear, the inside of the heat dissipation compartment is provided with a motor, the output end of the motor is fixedly connected with a worm gear meshing with the worm gear, a spray head is installed between the two support columns, a micro water pump is installed on the inner wall of the heat dissipation compartment, the micro water pump is connected with a water pipe, one end of the water pipe is connected with the spray head, and the other end of the water pipe is connected with an automobile water tank.

[0006] As a further scheme of the present application, the heat dissipation and fire extinguishing structure comprises a fire extinguishing assembly and a protection assembly, the fire extinguishing assembly comprises a groove provided with a special-shaped fan blade, the inside of the groove is provided with a tension spring, and the inside of the groove is slidably connected with an electromagnet, one end of the tension spring is fixedly connected with the electromagnet.

[0007] As a further solution of the present invention, the fire extinguishing assembly also includes a material box fixed inside the heat dissipation bin, the top and bottom of the material box are provided with slide grooves, and the interior of the material box is slidably connected to a support frame along the slide grooves, the interior of the support frame is fixed with a No. 1 airbag, the material box is slidably connected with a push rod, the end of the push rod located outside the material box is fixed with a conventional magnet, the outside of the push rod is provided with a telescopic spring between the conventional magnets, the push rod passes through the No. 1 airbag and does not contact the No. 1 airbag, the push rod is fixed with a connecting rod, and the connecting rod is fixedly connected to the support frame, the opening of the material box is sealed by a disposable No. 2 airbag, and a tying rod is fixed inside the material box.

[0008] As a further solution of the present invention, the fire extinguishing assembly includes a heating unit, which includes a No. 1 wheel fixed on the outer wall of the material box and located on one side of the top rod, a hollow tube rotatably connected to the material box, one end of the hollow tube passes through the No. 1 wheel and is fixed with a No. 2 wheel, one of the rotating shafts is provided with a No. 1 belt groove, and the No. 2 wheel is provided with a No. 2 belt groove, and the No. 1 belt groove and the No. 2 belt groove are connected by a transmission belt.

[0009] As a further solution of the present invention, the protective component includes a round rod fixedly connected to one end of a conventional fan blade, a T-shaped slot hole is provided inside the round rod, a T-shaped gear rod is provided inside the slot hole, a movable plate is slidably connected to the outside of the round rod, and a reset spring is provided on the outside of the round rod near the conventional fan blade.

[0010] As a further solution of the present invention, the protective assembly also includes a fixed plate fixed at one end of the round rod, the movable plate is rotatably connected to a connecting rod, the fixed plate is rotatably connected to an alloy wing, a support block is fixed on the inner side of the alloy wing, and one end of the connecting rod is rotatably connected to the support block.

[0011] As a further solution of the present invention, a heat-conducting rod is fixed inside the battery cell compartment, one end of the T-shaped lever passes through the round rod and extends to the inside of the heat-conducting rod, and one end of the lever can rotate inside the heat-conducting rod.

[0012] As a further solution of the present invention, the partition is provided with a ventilation hole.

[0013] As a further solution of the present invention, in an initial state, the movable plate is located on one side of the shift lever, and the return spring is in a fully compressed state.

[0014] As a further solution of the present invention, a temperature sensor and a smoke sensor are installed on the top cover of the housing.

[0015] The present invention proposes a new energy vehicle battery heat dissipation device, which has the following beneficial effects:

[0016] 1、When the new energy vehicle battery is on fire due to failure, the first thing is to produce smoke, and at this time the smoke sensor captures the smoke particles, and then transmits the signal to the vehicle controller, and then the controller controls the motor to start and makes the electromagnet energized to generate magnetic force. At this time, the motor is used as a driving component for extinguishing fire, which is different from the driving component for cooling, so the power of the motor will be adjusted to the maximum power and the rotating shaft will rotate at high speed. The micro water pump will pump the water in the car glass water tank through the water pipe into the spray head, and then the spray head sprays water mist, and then the regular fan blades and the special-shaped fan blades rotate synchronously to blow the water mist into the inside of the battery cell compartment through the air vent, delaying the battery fire.

[0017] 2、When the special-shaped fan blade rotates, the energized electromagnet will be thrown to the outside of the groove, just in line with the regular magnet, so under the action of repulsive magnetic force, the top rod will move, and the extension spring will facilitate the movement of the top rod after resetting, and then realize the reciprocating movement of the top rod. When the top rod moves, the sharp part at the front end of the top rod will break the second air bag, and then the second air bag will be broken like a balloon, and it will be broken into pieces. This helps to open the material box, and the crystal-like guanidine nitrate in the material box is discharged. At the same time, when the top rod moves, the support frame moves along the slide groove through the connecting rod, and the support frame moves with the first air bag, and the gas volume in the first air bag is much larger than that in the second air bag. The support frame moves with the first air bag to the rod and is broken by the rod. When the first air bag is pierced by the rod, the high-pressure gas inside is released instantly, forming a high-speed airflow. The airflow is sprayed in the opening direction of the material box, and the guanidine nitrate in the material box is sprayed into the battery cell compartment. The purpose is to make the guanidine nitrate evenly distributed in the battery cell compartment by spraying, so that the subsequent nitrogen gas is evenly distributed in the battery cell compartment, avoiding the accumulation of guanidine nitrate when flowing, and improving the subsequent fire extinguishing effect.

[0018] 3、The high temperature of the battery fire or smoke is transferred to the heat conduction rod, and then the heat conduction rod transfers the high temperature to the stop rod. Since the stop rod is a negative thermal expansion material, the characteristic of this kind of material is that when the temperature rises rapidly, its size length and volume will decrease. Therefore, the stop rod will shrink and decrease when heated, and the stop rod after shrinking and decreasing will no longer produce resistance to the moving plate, so the reset spring that is completely compressed is reset, and then the moving plate moves outside the round rod with the moving plate. When the moving plate moves, the alloy wing piece is unfolded through the connecting rod, and the unfolded alloy wing piece can prevent sparks from entering the heat dissipation compartment through the air vent, which is conducive to protecting the components in the heat dissipation compartment. Specifically, the alloy wing piece maintains the aerodynamic performance of the regular fan blade in the folded state, and forms a metal barrier instantly after unfolding, realizing the mode switching of "low energy dissipation + high energy protection". After unfolding, the alloy wing piece rotates with the rotating shaft, which plays a role similar to a fan blade, and the wind generated blows the nitrogen gas in the battery cell compartment, making the nitrogen gas evenly distributed in the battery cell compartment to increase the range of fire extinguishing. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A top view of the housing proposed by the present invention;

[0020] Figure 2 The present invention proposes Figure 1 Schematic diagram of local structure;

[0021] Figure 3 This is a schematic diagram of the internal structure of the heat dissipation chamber proposed by the present invention;

[0022] Figure 4 The present invention proposes Figure 3 Schematic diagram of local structure;

[0023] Figure 5 This is a schematic diagram of the special-shaped fan blade structure proposed by the present invention;

[0024] Figure 6 This is a schematic diagram of the protective component structure proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the gear lever and heat conducting rod proposed in the present invention;

[0026] Figure 8 This is a structural schematic diagram of one side of the material box proposed by the present invention;

[0027] Figure 9 This is a schematic diagram of the internal structure of the material box proposed by the present invention;

[0028] Figure 10 The present invention proposes Figure 9 Schematic diagram of local structure.

[0029] In the figure: 1. Shell; 2. Partition; 3. Cell compartment; 4. Heat dissipation compartment; 5. Support column; 6. Rotating shaft; 7. Conventional fan blade; 8. Special-shaped fan blade; 9. Worm gear; 10. Motor; 11. Worm; 12. Nozzle; 13. Micro water pump; 14. Water pipe; 15. Groove; 16. Tension spring; 17. Electromagnet; 18. Material box; 19. Chute; 20. Support frame; 21. No. 1 airbag; 22. Ejector rod; 23. Conventional magnet; 24. Telescopic spring; 25. Connecting rod; 26. No. 2 airbag; 27. Tie rod; 28. No. 1 wheel; 29. ​​No. 2 wheel; 30. No. 1 belt slot; 31. No. 2 belt slot; 32. Transmission belt; 33. Round rod; 34. Shift lever; 35. Moving plate; 36. Return spring; 37. Fixed plate; 38. Connecting rod; 39. Alloy wing; 40. Support block; 41. Heat-conducting rod; 42. Vent; 43. Hollow tube. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on the overall structure of the present invention.

[0032] A new energy vehicle battery heat dissipation device comprises: a shell 1, a temperature sensor and a smoke sensor are installed on the top cover of the shell 1, a heat dissipation and fire extinguishing structure is provided inside the shell 1, the interior of the shell 1 is divided into a battery cell compartment 3 and a heat dissipation compartment 4 by a partition 2, the partition 2 is provided with a vent 42, and the heat dissipation and fire extinguishing structure is located inside the heat dissipation compartment 4, the heat dissipation and fire extinguishing structure comprises two support columns 5 fixed inside the heat dissipation compartment 4, the support columns 5 are internally connected to a rotating shaft 6, and the two ends of the rotating shaft 6 are respectively Regular fan blades 7 and special-shaped fan blades 8, a worm gear 9 is provided on the outside of the rotating shaft 6, a motor 10 is installed inside the heat dissipation chamber 4, and a worm 11 engaged with the worm gear 9 is fixed to the output end of the motor 10, a nozzle 12 is installed between the two support columns 5, a micro water pump 13 is installed on the inner wall of the heat dissipation chamber 4, the micro water pump 13 is connected to a water pipe 14, one end of the water pipe 14 is connected to the nozzle 12, and the other end of the water pipe 14 is connected to the car water tank, the heat dissipation and fire extinguishing structure includes a fire extinguishing component and a protection component.

[0033] Further, the fire extinguishing assembly comprises a groove 15 provided with the special-shaped fan blade 8, the inside of the groove 15 is provided with a tension spring 16, the inside of the groove 15 is slidably connected with an electromagnet 17, one end of the tension spring 16 is fixedly connected with the electromagnet 17, the fire extinguishing assembly further comprises a material box 18 fixedly arranged in the heat dissipation bin 4, the top and the bottom of the material box 18 are provided with a sliding groove 19, and the inside of the material box 18 is slidably connected with a support frame 20 along the sliding groove 19, the inside of the support frame 20 is fixedly arranged with a first air bag 21, the material box 18 is slidably connected with a top rod 22, one end of the top rod 22 located outside the material box 18 is fixedly arranged with a regular magnet 23, the outside of the top rod 22 is provided with a telescopic spring 24 between the regular magnets 23, the top rod 22 penetrates through the first air bag 21 and is not in contact with the first air bag 21, the top rod 22 is fixedly arranged with a connecting rod 25, and the connecting rod 25 is fixedly connected with the support frame 20, the opening of the material box 18 is sealed by a disposable second air bag 26, and the inside of the material box 18 is fixedly arranged with a binding rod 27.

[0034] It can be concluded that when the special-shaped fan blade 8 rotates at a high speed, the centrifugal force generated will make the electrified electromagnet 17 (the electromagnet 17 will be electrified only when extinguishing the fire, and will not be electrified when the special-shaped fan blade 8 normally dissipates heat for the battery, the purpose is to prevent the top rod 22 from moving when dissipating heat) overcome the tension of the tension spring 16, and at this time the electromagnet 17 will be thrown to the outside of the groove 15 and be in the same straight line with the regular magnet 23, the interval between the electromagnet 17 and the regular magnet 23 in this state is only 1mm, so under the action of the repelling magnetic force, the top rod 22 will move, the telescopic spring 24 facilitates the resetting of the top rod 22 after moving, thereby realizing the reciprocating movement of the top rod 22, when the top rod 22 moves, the pointed part at the front end of the top rod 22 will break the second air bag 26, and then the second air bag 26 will be broken into pieces like a broken balloon, which is conducive to opening the material box 18 and facilitating the discharge of the crystal-like guanidine nitrate in the material box 18, at the same time, when the top rod 22 moves, the support frame 20 moves along the sliding groove 19 through the connecting rod 25, the support frame 20 moves with the first air bag 21, and the gas volume filled in the first air bag 21 is much larger than that of the second air bag 26, the support frame 20 moves with the first air bag 21 to the binding rod 27 and is broken by the binding rod 27, when the first air bag 21 is pierced by the binding rod 27, the high-pressure gas in the first air bag 21 is released instantaneously, forming a high-speed airflow, the airflow is sprayed along the opening direction of the material box 18, and the guanidine nitrate in the material box 18 is sprayed to the battery cell bin 3, the purpose is to make the guanidine nitrate evenly distributed in the battery cell bin 3 through spraying, so that the subsequent nitrogen gas is evenly distributed in the battery cell bin 3, avoiding the accumulation of guanidine nitrate when flowing conventionally, and the subsequent extinguishing effect can be improved.

[0035] Next, the fire extinguishing assembly includes a heating unit, which includes a No. 1 wheel 28 fixed on the outer wall of the material box 18 and located on one side of the top rod 22, a hollow tube 43 rotatably connected to the material box 18, one end of the hollow tube 43 passes through the No. 1 wheel 28 and is fixed with a No. 2 wheel 29, one of the rotating shafts 6 is provided with a No. 1 belt groove 30, and the No. 2 wheel 29 is provided with a No. 2 belt groove 31, and the No. 1 belt groove 30 and the No. 2 belt groove 31 are connected by a transmission belt 32. In the fire extinguishing state, when the No. 2 wheel 29 rotates at a high speed, it repeatedly rubs against the No. 1 wheel 28 to generate high temperature. The high temperature is transmitted to the interior of the material box 18 through the hollow tube 43 to quickly preheat the guanidine nitrate. The purpose of preheating is to enable it to be quickly heated and oxidized and reduced in the battery cell compartment 3 to produce nitrogen. The nitrogen in the two air bags and the nitrogen generated by the oxidation and reduction of guanidine nitrate dilute or eliminate the oxygen in the air, thereby reducing the oxygen concentration around the battery fire source, making the oxygen required for combustion insufficient, and thus extinguishing the flame.

[0036] The cam 35 is fixed to the cam 33 at one end of the cam 33 and a T-shaped lever 34 is provided inside the lever 33. The cam 35 is slidably connected to the outside of the cam 33 and a return spring 36 is provided on the outside of the cam 33 near the conventional blade 7. The cam 35 also includes a fixed plate 37 fixed at one end of the cam 33. The movable plate 35 is rotatably connected to a connecting rod 38. The fixed plate 37 is rotatably connected to an alloy wing 39. A support block 40 is fixed to the inner side of the alloy wing 39. One end of the connecting rod 38 is rotatably connected to the support block 40. A heat conducting rod 41 is fixed to the inside of the battery cell compartment 3. One end of the T-shaped lever 34 passes through the round rod 33 and extends to the inside of the heat conducting rod 41. One end of the lever 34 can rotate inside the heat conducting rod 41. In the initial state, the movable plate 35 is located on one side of the lever 34, and the return spring 36 is in a fully compressed state.

[0037] Specifically, when the battery is on fire or smokes, the high temperature is transferred to the heat-conducting rod 41, and then the heat-conducting rod 41 transfers the high temperature to the stop rod 34. Since the stop rod 34 is a negative thermal expansion material, the characteristic of such material is that when the temperature rises rapidly, its size (length, volume) will actually decrease, so the stop rod 34 will shrink and decrease in size when heated. The stop rod 34 that has shrunk and decreased in size no longer produces a blocking force on the moving plate 35, so the reset spring 36 that has been completely compressed resets, and then moves the moving plate 35 outside the round rod 33. When the moving plate 35 moves, it brings the alloy flaps 39 to unfold from the folded state through the connecting rod 38. The unfolded alloy flaps 39 can prevent sparks from entering the heat dissipation compartment 4 through the air vent 42, and are beneficial to provide protection for the components in the heat dissipation compartment 4. Specifically, the alloy flaps 39 maintain the aerodynamic performance of the conventional fan blade 7 in the folded state, and form a metal barrier instantaneously after unfolding, realizing the mode switching of "low-energy heat dissipation + high-energy protection". In addition, the alloy flaps 39 rotate with the shaft 6 after unfolding, and function like a fan blade, generating wind that blows to the nitrogen gas in the battery cell compartment 3, so that the nitrogen gas is evenly distributed in the battery cell compartment 3 to increase the range of fire extinguishing.

[0038] It should be noted that the two air bags adopt a three-layer composite film structure of aramid reinforced layer / intermediate barrier layer / inner sealing layer. Through 85℃ / 1000 hour aging test, the gas filled in the two air bags is in a stable state, ensuring the stability of the material at the working temperature of the battery, which can withstand the normal working temperature of the battery cell compartment 3 for a long time, usually ≤80℃, so that it will not explode in the normal state, and will only be pierced and opened by the rod 27 when extinguishing the fire.

[0039] Working principle: the alloy flaps 39 are in a folded state in the normal state, and maintain the aerodynamic performance of the conventional fan blade 7 made of plastic material in the folded state. The alloy flaps 39 will only unfold when the battery smokes and catches fire. When the temperature sensor detects that the temperature of the battery rises, the motor 10 is started to drive the worm 11 to rotate, and then the two shafts 6 are rotated under the action of the worm gear 9. When the shaft 6 rotates, it drives the conventional fan blade 7 and the special-shaped fan blade 8 to rotate. The wind generated by the conventional fan blade 7 blows to the battery cell compartment 3 through the air vent 42, and combines with other heat dissipation methods of the prior art to realize the cooling and heat dissipation of the battery. When the temperature is within the safe range, the motor 10 stops working,

[0040] When the new energy vehicle battery is on fire due to failure, the first thing that happens is smoke, and at this time the smoke sensor captures the smoke particles, and then transmits the signal to the vehicle controller, and then the controller controls the motor 10 to start and makes the electromagnet 17 energized to generate magnetic force, (at this time the motor 10 is used as a driving part for extinguishing fire, which is different from the driving part for cooling, so the power of the motor 10 will be adjusted to the maximum power and the rotating shaft 6 will rotate at high speed), the micro water pump 13 will draw water from the car glass water tank through the water pipe 14 into the spray head 12, and then the spray head 12 sprays water mist, and then the regular fan blade 7 and the special-shaped fan blade 8 rotate synchronously to blow the water mist into the inside of the battery cell compartment 3, delaying the battery fire,

[0041] In addition, when the special-shaped fan blade 8 rotates at high speed, the centrifugal force generated will make the electromagnet 17 (the electromagnet 17 will only be energized when extinguishing fire, and will not be energized when the special-shaped fan blade 8 normally cools the battery, the purpose is to prevent the top rod 22 from moving when cooling) overcome the tension of the tension spring 16, and at this time the electromagnet 17 will be thrown to the outside of the groove 15 and be in the same straight line with the regular magnet 23, the interval between the electromagnet 17 and the regular magnet 23 in this state is only 1mm, so under the action of the repelling magnetic force, the top rod 22 will move, and the extension spring 24 will facilitate the movement of the top rod 22 after resetting, thereby realizing the reciprocating movement of the top rod 22,

[0042] When the top rod 22 moves, the sharp part at the front end of the top rod 22 will pierce the second air bag 26, and then the second air bag 26 will be broken into pieces like a broken balloon, which is beneficial to open the material box 18 and facilitate the discharge of the crystal-shaped guanidine nitrate in the material box 18. At the same time, the top rod 22 moves along the sliding groove 19 through the connecting rod 25 with the support frame 20, the support frame 20 moves with the first air bag 21, and the gas volume in the first air bag 21 is much larger than that in the second air bag 26. The support frame 20 moves with the first air bag 21 to the piercing rod 27 and is pierced by the piercing rod 27. When the first air bag 21 is pierced by the piercing rod 27, the high-pressure gas inside is released instantaneously, forming a high-speed airflow. The airflow is sprayed along the opening direction of the material box 18, and the guanidine nitrate in the material box 18 is sprayed towards the battery cell compartment 3. The purpose is to make the guanidine nitrate evenly distributed in the battery cell compartment 3 by spraying, so that the nitrogen gas is evenly distributed in the subsequent battery cell compartment 3, avoiding the accumulation of guanidine nitrate when flowing normally, and improving the subsequent extinguishing effect,

[0043] In addition, the first air bag 21 and the second air bag 26 use chemically inert nitrogen as the filling gas, and the inert gas flows to the battery cell compartment 3 at the moment of breaking, and before the guanidine nitrate is sprayed, the rotating shaft 6 rotates the second wheel 29 and the hollow pipe 43 at high speed through the transmission belt 32 (since the motor 10 in the cooling mode is rotating at a medium or low speed, the temperature generated is lower than the heating oxidation temperature of the guanidine nitrate, so the guanidine nitrate is not heated and oxidized), but in the fire extinguishing state, the second wheel 29 rotates at high speed and repeatedly rubs against the first wheel 28 to generate high temperature, and the high temperature is transmitted to the inside of the material box 18 through the hollow pipe 43 to rapidly preheat the guanidine nitrate, and the preheating purpose is to rapidly heat and oxidize the guanidine nitrate in the battery cell compartment 3 to generate nitrogen, and the nitrogen generated by the oxidation and reduction of the guanidine nitrate in the two air bags dilutes or removes the oxygen in the air, thereby reducing the oxygen concentration around the battery fire source, so that the oxygen required for combustion is insufficient, and the flame is extinguished, and through the above operation, the rate of extinguishing the fire or delaying the self-ignition of the battery is realized, and valuable escape time is provided for the passengers and the driver on the vehicle,

[0044] In addition, when the battery is self-ignited or smokes, the high temperature is transmitted to the heat conduction rod 41, and then the heat conduction rod 41 transmits the high temperature to the stop rod 34, and since the stop rod 34 is a negative thermal expansion material, the characteristic of this kind of material is that when the temperature rapidly rises, their size (length, volume) will actually decrease, so the stop rod 34 will shrink and decrease in size when heated, and the stop rod 34 that has shrunk and decreased in size no longer generates a blocking force on the moving plate 35, so the reset spring 36 that has been completely compressed resets, and then moves the moving plate 35 outside the round rod 33, and when the moving plate 35 moves, it brings the alloy flaps 39 to unfold from the folded state through the connecting rod 38, and the unfolded alloy flaps 39 can prevent sparks from entering the heat dissipation compartment 4 through the air vent 42, and are beneficial to protecting the components in the heat dissipation compartment 4; specifically, the alloy flaps 39 maintain the aerodynamic performance of the regular fan blade 7 in the folded state, and form a metal barrier instantaneously after unfolding, so as to realize the mode switching of "low-energy heat dissipation + high-energy protection",

[0045] In addition, the alloy flaps 39 unfold and rotate with the rotating shaft 6 to play a role similar to that of the fan blade, and the wind generated blows towards the nitrogen in the battery cell compartment 3, so as to uniformly distribute the nitrogen in the battery cell compartment 3 and increase the range of fire extinguishing.

[0046] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A new energy vehicle battery heat dissipation device, comprising: A housing (1) is characterized in that: a heat dissipation and fire extinguishing structure is provided inside the housing (1); the interior of the housing (1) is divided into a battery cell compartment (3) and a heat dissipation compartment (4) by a partition (2); and the heat dissipation and fire extinguishing structure is located inside the heat dissipation compartment (4); the heat dissipation and fire extinguishing structure comprises two support columns (5) fixed inside the heat dissipation compartment (4); a rotating shaft (6) is rotatably connected inside the support columns (5); two ends of the rotating shaft (6) are respectively a conventional fan blade (7) and a special-shaped fan blade (8); the rotating shaft ( 6) is provided with a worm gear (9) on the outside, a motor (10) is installed inside the heat dissipation chamber (4), a worm (11) meshing with the worm gear (9) is fixed to the output end of the motor (10), a nozzle (12) is installed between the two support columns (5), a micro water pump (13) is installed on the inner wall of the heat dissipation chamber (4), the micro water pump (13) is connected to a water pipe (14), one end of the water pipe (14) is connected to the nozzle (12), and the other end of the water pipe (14) is connected to the car water tank.

2. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: The heat dissipation and fire extinguishing structure comprises a fire extinguishing component and a protective component. The fire extinguishing component comprises a groove (15) provided on the special-shaped fan blade (8). A tension spring (16) is provided inside the groove (15). An electromagnet (17) is slidably connected inside the groove (15). One end of the tension spring (16) is fixedly connected to the electromagnet (17).

3. A new energy vehicle battery heat dissipation device according to claim 2, characterized in that: The fire extinguishing assembly further comprises a material box (18) fixed inside the heat dissipation bin (4), the top and bottom of the material box (18) are provided with a slide groove (19), and the inside of the material box (18) is slidably connected to a support frame (20) along the slide groove (19), the inside of the support frame (20) is fixed with a No. 1 air bag (21), the material box (18) is slidably connected to a push rod (22), one end of the push rod (22) located outside the material box (18) is fixed with a conventional magnet (23), the outside of the push rod (22) is provided with a telescopic spring (24) between the conventional magnets (23), the push rod (22) is fixed with a connecting rod (25), and the connecting rod (25) is fixedly connected to the support frame (20), the opening of the material box (18) is sealed by a disposable No. 2 air bag (26), and the inside of the material box (18) is fixed with a tying rod (27).

4. A new energy vehicle battery heat dissipation device according to claim 2, characterized in that: The fire extinguishing assembly includes a heating unit, which includes a first wheel (28) fixed on the outer wall of the material box (18) and located on one side of the top rod (22), a hollow tube (43) rotatably connected to the material box (18), one end of the hollow tube (43) passes through the first wheel (28) and is fixed with a second wheel (29), one of the rotating shafts (6) is provided with a first belt groove (30), the second wheel (29) is provided with a second belt groove (31), and the first belt groove (30) and the second belt groove (31) are connected by a transmission belt (32).

5. A new energy vehicle battery heat dissipation device according to claim 2, characterized in that: The protective assembly comprises a conventional fan blade (7) having one end fixedly connected to a round rod (33), a T-shaped slotted hole being provided inside the round rod (33), a T-shaped stop rod (34) being provided inside the slotted hole, a movable plate (35) being slidably connected to the outside of the round rod (33), and a reset spring (36) being provided on the outside of the round rod (33) near the conventional fan blade (7).

6. A new energy vehicle battery heat dissipation device according to claim 5, characterized in that: The protective assembly further comprises a fixed plate (37) fixed at one end of the round rod (33); the movable plate (35) is rotatably connected to a connecting rod (38); the fixed plate (37) is rotatably connected to an alloy wing (39); a support block (40) is fixed on the inner side of the alloy wing (39); and one end of the connecting rod (38) is rotatably connected to the support block (40).

7. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: A heat-conducting rod (41) is fixed inside the battery cell compartment (3), one end of the T-shaped lever (34) passes through the round rod (33) and extends to the inside of the heat-conducting rod (41), and one end of the lever (34) is rotatable inside the heat-conducting rod (41).

8. The new energy vehicle battery heat dissipation device according to claim 5, characterized in that: In the initial state, the movable plate (35) is located on one side of the shift lever (34), and the return spring (36) is in a fully compressed state.

9. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: A temperature sensor and a smoke sensor are installed on the top cover of the housing (1).

10. A new energy vehicle battery heat dissipation device according to claim 1, characterized in that: The partition (2) is provided with a ventilation opening (42).

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