New energy all-terrain vehicle

Abstract

The invention relates to the field of new energy automobiles, in particular to a new energy all-terrain vehicle. A new energy all-terrain vehicle comprises an all-terrain vehicle body, a battery protection box and the like. A battery protection box is arranged on the all-terrain vehicle body; an outer circulation heat management unit is connected in the battery protection box; the outer circulation heat management unit is connected with two heat conduction plates. According to the all-terrain vehicle, the battery temperature during daily driving is cooperatively managed through external circulation heat management and internal circulation heat management, uniform and sufficient heat dissipation is conducted on the battery, thermal runaway of the battery is prevented, and meanwhile, by means of the damping strips, the limiting rods and the springs, the all-terrain vehicle body is prevented from being damaged in the driving process. The shock absorption strip enables the heat conduction plate not to make contact with the battery protection box, part of energy generated by inertia of the battery box can be absorbed, collision of the battery box is avoided, the anti-collision performance of the battery is effectively improved, the safety problem caused by power interruption of an automobile is avoided, and the safety of the automobile in the running process is improved.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicles, and more particularly to a new energy all-terrain vehicle. Background Technology

[0002] Currently, most all-terrain vehicles on the market are gasoline-powered, relying on the combustion of fossil fuels to stably output power, which also leads to increasing pollution. With the development of new energy vehicles, more and more people prefer new energy-powered vehicles. New energy vehicles not only produce no pollution, but also have lower operating and maintenance costs, resulting in a broader market demand.

[0003] The existing technology (CN115692930A) describes a battery management device and method for new energy all-terrain vehicles. This device fixes the battery manager body to a fully bonded liquid-cooled integrated system. A protective cover that slides on the surface of a limiting plate protects the battery manager body. The inclusion of springs and a buffer plate further enhances the device's impact resistance. However, all-terrain vehicles are typically used in extreme off-road environments. If powered by new energy sources, their energy storage device—the battery—faces new challenges. In extreme conditions, the battery needs to continuously discharge at high rates, generating significant heat that can easily lead to overheating and thermal runaway. The protective cover cannot effectively dissipate heat, and uneven heat dissipation can cause large temperature differences within the battery, severely impacting its performance and lifespan. Furthermore, all-terrain vehicles in extreme environments also face the risk of battery impacts, leading to poor contact, power interruption, and compromised driving safety. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a new energy all-terrain vehicle.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a new energy all-terrain vehicle, comprising an all-terrain vehicle body and a battery protection box; the battery protection box is disposed on the all-terrain vehicle body; it also includes an external circulation thermal management unit; the external circulation thermal management unit is connected inside the battery protection box; the external circulation thermal management unit is connected to two heat-conducting plates; a battery box is connected between the two heat-conducting plates; the external circulation thermal management unit is used for air cooling of the battery box; the battery protection box is connected to an internal circulation thermal management unit; the internal circulation thermal management unit is used for liquid cooling of the battery box; the internal circulation thermal management unit is connected to the two heat-conducting plates respectively; the two heat-conducting plates are interconnected; a plurality of limiting rods are fixedly connected to the left and right sides of the battery protection box; the two heat-conducting plates are slidably connected to all the limiting rods; a plurality of springs are fixedly connected between the two heat-conducting plates; each limiting rod passes through the middle of a spring.

[0006] In the above scheme, preferably, the two heat-conducting plates are coated with an aerogel heat-insulating coating on their opposing sides.

[0007] In the above scheme, preferably, the external circulation thermal management unit includes a fan and shock-absorbing strips; two fans are installed at the front of the battery protection box; several shock-absorbing strips are fixedly connected to the lower and upper parts of the battery protection box, and the shock-absorbing strips are made of heat-resistant sponge material; the two heat-conducting plates are fixedly connected to the adjacent shock-absorbing strips on opposite sides; an air inlet is opened at the upper part of the battery protection box; and an exhaust port is opened at the front of the battery protection box.

[0008] In the above scheme, preferably, both the air inlet and the exhaust outlet are equipped with filters.

[0009] In the above scheme, preferably, the internal circulation thermal management unit includes a pump; the pump is installed at the rear of the battery protection box; a temperature controller is installed at the rear of the battery protection box; the pump is connected to the temperature controller; each heat-conducting plate has a flow channel; the pump is connected to the upper flow channel; the temperature controller is connected to the lower flow channel; the upper heat-conducting plate has a combined quick connector assembly; the lower heat-conducting plate has two combined quick connector assemblies; a heat sink is fixedly connected inside the battery box; the heat sink is a hollow plate; a combined quick connector assembly is connected to the upper part of the heat sink; two combined quick connector assemblies are provided at the lower part of the heat sink; the combined quick connector assemblies on the heat sink contact the combined quick connector assemblies on the adjacent heat-conducting plates respectively; several battery packs are detachably installed inside the battery box; adjacent battery packs are separated by heat sinks.

[0010] In the above scheme, preferably, the combined quick connector assembly includes a conduit; the heat-conducting plate is connected to the conduit; the conduit is equipped with an elastic rod; the telescopic part of the elastic rod is fixedly connected to a ball valve; the ball valve is in contact with the end of the conduit; the end of the conduit is provided with a circular hole, the diameter of which is smaller than the diameter of the ball valve; the diameter of the ball valve is smaller than the diameter of the conduit; a pressure sensor is provided inside the ball valve.

[0011] In the above scheme, preferably, each of the two heat-conducting plates has a limiting ring fixed to its opposite side; both limiting rings are in contact with the battery box.

[0012] In the above scheme, preferably, the limiting ring is made of heat-resistant and flame-retardant rubber.

[0013] In the above-mentioned scheme, preferably, it also includes electric push rods; two electric push rods are installed on the lower heat-conducting plate, distributed left and right; all the electric push rods are in contact with the upper heat-conducting plate; the battery box is provided with a movable cover plate; the cover plate is in contact with the upper heat-conducting plate; a manifold cavity is opened in the cover plate; a plurality of first pressure relief holes are opened in the lower part of the manifold cavity; each first pressure relief hole corresponds to a battery pack; a plurality of second pressure relief holes are opened on the left and right sides of the manifold cavity; a plurality of toothed grooves are opened on the upper limiting ring; each second pressure relief hole corresponds to a toothed groove.

[0014] In the above scheme, preferably, it also includes a pressure relief pipe; several evenly distributed pressure relief pipes are fixedly connected inside the upper heat-conducting plate; the pressure relief pipes are connected to the manifold.

[0015] The beneficial effects of this invention are as follows: 1. This invention manages the battery temperature during daily driving by using external circulation heat management and internal circulation heat management in a coordinated manner, providing uniform and sufficient heat dissipation to ensure that the battery always operates in a comfortable range. The battery pack status is monitored in real time by a pressure sensor to prevent thermal runaway and greatly extend the service life of each battery pack. At the same time, relying on shock-absorbing strips, limiting rods, and springs, the shock-absorbing strips prevent the heat conduction plate from contacting the battery protection box during the operation of the all-terrain vehicle. They can also absorb some of the energy generated by the inertia of the battery box, avoiding collisions that could lead to poor contact of the battery pack's electrical contacts or leakage of battery fluid. This effectively improves the battery's anti-collision performance, avoids safety problems caused by power interruption of the vehicle, and enhances safety during vehicle operation.

[0016] 2. The battery is clamped and fixed by springs and combined with a quick-connect assembly, which facilitates the replacement of a battery pack in the battery box. After installation, the oil circuit is automatically connected to ensure the normal circulation of heat transfer oil, so that the battery pack in the battery box can be fully cooled and the danger of thermal runaway of the battery can be effectively avoided.

[0017] 3. By installing a pressure relief pipe, the gas generated during normal operation of the battery pack can be cooled before being discharged, reducing the possibility of the discharged flammable gas being ignited. When thermal runaway occurs in the battery pack, it is necessary to release the gas inside the battery pack quickly and efficiently. An electric push rod is installed to separate the heat conduction plate from the top of the battery box. The abnormal pressure inside the battery box will push up the cover plate, and then the pressure inside the battery box will be released through the first pressure relief hole and the second pressure relief hole in sequence. This achieves rapid and directional pressure release of the battery pack inside the battery box, effectively ensuring the safety of the occupants and giving them time to handle the fault or escape. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the new energy all-terrain vehicle of the present invention; Figure 2 This is a first-view perspective three-dimensional structural diagram of the battery protection box of the present invention; Figure 3 This is a two-dimensional structural diagram of the battery protection box of the present invention from a second perspective; Figure 4 This is a schematic diagram of the internal structure of the battery protection box of the present invention; Figure 5 This is a schematic diagram of the installation position of the electric actuator of the present invention; Figure 6 This is a schematic diagram of the installation position of the heat sink of the present invention; Figure 7 This is a schematic diagram of the catheter installation position according to the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point X in the middle; Figure 9 This is a schematic diagram of the initial state of the electric push rod and the upper heat-conducting plate of the present invention; Figure 10 This is a schematic diagram showing the contact between the electric push rod of the present invention and the upper heat-conducting plate. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figures 1-10 .

[0020] Example 1: A new energy all-terrain vehicle, according to Figures 1-8 As shown, it includes an all-terrain vehicle body 1 and a battery protection box 2; the battery protection box 2 is installed on the all-terrain vehicle body 1. It also includes an external circulation thermal management unit, a battery box 4, an internal circulation thermal management unit, heat-conducting plates 6, limiting rods 7, and springs 8; the external circulation thermal management unit is connected inside the battery protection box 2; the external circulation thermal management unit is connected to two vertically distributed heat-conducting plates 6; the battery box 4 is connected between the two heat-conducting plates 6; the internal circulation thermal management unit is connected to the battery protection box 2; the internal circulation thermal management unit is connected to the two heat-conducting plates 6 respectively; the two heat-conducting plates 6 are interconnected; several limiting rods 7 are fixedly connected to the left and right sides of the battery protection box 2; the two heat-conducting plates 6 are slidably connected to all the limiting rods 7; several springs 8 are fixedly connected between the two heat-conducting plates 6; each limiting rod 7 passes through the middle of a spring 8.

[0021] The two heat-conducting plates are coated with an aerogel thermal insulation coating on their six-phase-facing sides.

[0022] The external circulation thermal management unit includes a fan 3 and a shock-absorbing strip 5; two fans 3 are installed on the front of the battery protection box 2, which are distributed on the left and right; several equidistant shock-absorbing strips 5 are fixed to the lower and upper parts of the battery protection box 2, and the shock-absorbing strips 5 are made of heat-resistant sponge material; two heat-conducting plates 6 are fixed to the adjacent shock-absorbing strips 5 on opposite sides; an air inlet 201 is opened on the upper part of the battery protection box 2; and an exhaust vent 202 is opened on the front of the battery protection box 2.

[0023] Both the air inlet 201 and the exhaust outlet 202 are equipped with filters.

[0024] The internal circulation thermal management unit includes a pump 9, a thermostat 10, a heat sink 11, and a quick-connect assembly. The pump 9 is installed at the rear of the battery protection box 2. The thermostat 10 is also installed at the rear of the battery protection box 2. The pump 9 is connected to the thermostat 10. Each heat conduction plate 6 has a flow channel 602. The pump 9 is connected to the upper flow channel 602. The thermostat 10 is connected to the lower flow channel 602. The upper heat conduction plate 6 is equipped with a quick-connect assembly. The lower heat conduction plate 6 has two front... The battery box 4 has a rear-distributed quick-connect assembly; a heat sink 11 is fixedly connected inside the battery box 4; the heat sink 11 is a hollow plate; a quick-connect assembly is connected to the upper part of the heat sink 11; two quick-connect assemblies are provided at the lower part of the heat sink 11; the quick-connect assemblies on the heat sink 11 are in contact with the quick-connect assemblies on the adjacent heat-conducting plates 6 respectively; several battery packs 111 are detachably installed inside the battery box 4; adjacent battery packs 111 are separated by the heat sink 11.

[0025] The combined quick-connect assembly includes a conduit 12, an elastic rod 13, and a ball valve 14; a heat-conducting plate 6 is connected to the conduit 12; the elastic rod 13 is mounted on the conduit 12; the ball valve 14 is fixedly connected to the telescopic part of the elastic rod 13; the ball valve 14 is in contact with the end of the conduit 12; the end of the conduit 12 is provided with a circular hole, the diameter of which is smaller than the diameter of the ball valve 14; the diameter of the ball valve 14 is smaller than the diameter of the conduit 12; a pressure sensor is provided inside the ball valve 14.

[0026] Each of the two heat-conducting plates 6 has a limiting ring 601 fixed to its opposite side; both limiting rings 601 are in contact with the battery box 4.

[0027] The limiting ring 601 is made of heat-resistant and flame-retardant rubber.

[0028] When the all-terrain vehicle body 1 is driving in extreme off-road environments, the battery, which serves as the power source, will continuously discharge at a high rate, causing the battery to generate a large amount of heat. This can easily lead to battery overheating and thermal runaway. Insufficient heat dissipation can also cause large temperature differences inside the battery, affecting its performance and lifespan. Therefore, an external circulation thermal management unit and an internal circulation thermal management unit are installed in the battery protection box 2. This creates a deep synergy between mechanical protection and thermal management within the battery protection box 2, allowing for early intervention in potential problems, reducing the probability of danger, and maximizing the protection of the personal safety of the driver and passengers.

[0029] The external circulation heat management is mainly achieved through fan 3. When the battery box 4 generates a large amount of heat, fan 3 is activated, forcing air into the battery protection box 2 through the air intakes 201 and then exhausting it into the air through the exhaust ports 202. Since the heat generated inside the battery box 4 will accumulate at the top, when outside air enters the battery protection box 2, heat exchange occurs between the outside air and the battery box 4, thereby cooling the battery box 4. Then, the heated air is exhausted back to the outside by fan 3. Since the exhaust ports 202 are located in the opposite direction to the normal driving direction of the vehicle, the exhausted hot air will not re-enter the battery protection box 2 as the all-terrain vehicle body 1 moves. Cold outside air can also replenish the battery protection box 2 at any time, thus achieving air-cooled heat dissipation of the battery box 4, effectively and evenly dissipating heat from the battery box 4 with high heat dissipation efficiency.

[0030] The internal circulation heat management mainly involves the directional flow of heat transfer oil between the heat transfer plate 6 and the heat sink 11. When the battery box 4 generates a large amount of heat, the pump 9 is activated. The pump 9 pumps the cooled heat transfer oil in the thermostat 10 to the upper flow channel 602. The aerogel heat insulation coating on the heat transfer plate 6 effectively reduces heat exchange between the cooled heat transfer oil and the air in the battery box 4, thus reducing the heat exchange effect on the battery packs 111 inside the battery box 4. Then, the heat transfer oil enters the heat sink 11 through the front quick-connect assembly. Subsequently, some of the heat transfer oil enters the lower heat transfer plate 6 through the front and rear quick-connect assemblies distributed at the bottom of the heat sink 11. The heat transfer oil then flows back to the thermostat 10 for recooling. In this way, the heat generated inside the battery box 4 is fully removed through the flow of the heat transfer oil, effectively cooling the individual battery packs 11 inside the battery box 4. All components are cooled to reduce the temperature difference within each battery pack 111, greatly extending the service life of each battery pack 111. When the heat transfer oil flows through the lower channel 602, it transfers some of the heat carried out from the battery box 4 to the lower heat transfer plate 6. The battery protection box 2 also has an external circulation thermal management unit that cools the air inside the battery protection box 2. Thus, while promoting airflow, the external circulation thermal management unit can also cool the lower heat transfer plate 6, thereby cooling the heat transfer oil flowing out from the heat transfer plate 11. This effectively reduces the working pressure of the temperature controller 10, improves the efficiency of heat transfer oil circulation, and enhances the heat dissipation effect. When the ambient temperature is low, the external circulation thermal management unit is turned off or operates at low speed, while the internal circulation thermal management unit heats the heat transfer fluid, thereby increasing the battery temperature and enabling the battery to start up quickly and enter the working state.

[0031] The battery pack 111 is sealed within the battery box 4, making the entire internal circulation heat management system closed. This effectively prevents the intrusion of mud, water vapor, and salt spray, meeting waterproof and corrosion-resistant requirements and effectively protecting the battery pack 111. Furthermore, filters are installed in both the air inlet 201 and the exhaust vent 202 to prevent dust and impurities from entering the battery box 4, protecting the components within. The heat transfer oil flows from top to bottom, ensuring uniform temperature within the battery box 4. This effectively prevents temperature differences within the battery pack 111 during winter when temperatures are low, which could affect the discharge power of the battery pack 111, leading to performance instability and increased safety hazards during use. This is further enhanced by the addition of a marine-grade heat transfer system. The shock-absorbing strips 5, limiting rods 7, and springs 8, made of cotton material, ensure that the heat-conducting plates 6 do not come into contact with the battery protection box 2 during the operation of the all-terrain vehicle body 1. The shock-absorbing strips 5 also absorb some of the energy generated by the inertia of the battery box 4, preventing collisions that could lead to poor contact of the battery pack 111's electrical contacts or leakage of battery fluid. The springs 8 primarily function to tightly clamp the two heat-conducting plates 6 into the battery box 4. Combined with the heat-resistant and flame-retardant rubber limiting rings 601, this effectively prevents the battery box 4 from detaching from the clamping and fixing of the heat-conducting plates 6 when the battery protection box 2 shakes. Furthermore, the springs 8 also allow for easy replacement of a battery pack 111 within the battery box 4 by simply removing the two heat-conducting plates. When the upper heat-conducting plate 6 is opened, the corresponding spring 8 stretches, allowing the battery box 4 to be removed and the corresponding battery pack 111 to be replaced. This makes the process simpler and more convenient. However, the quick-connect assembly is crucial for replacing the battery box 4. When the upper heat-conducting plate 6 is lifted upwards, the elastic rod 13 within the quick-connect assembly extends, causing the ball valve 14 to block the lower part of the conduit 12. Similarly, the elastic rod 13 within the quick-connect assembly at the top of the heat sink 11 extends, causing the ball valve 14 to block the upper part of the conduit 12. This prevents leakage of the heat-conducting oil in the flow channel 602 and the hollow heat sink 11. When the upper heat-conducting plate 6 is lowered, the ball valve 14 within the quick-connect assembly of the upper heat-conducting plate 6 and the heat sink... The ball valve 14 inside the quick-connect assembly at the top of plate 11 is in contact. A pressure sensor inside the ball valve 14 monitors the contact between them, ensuring that the ball valve 14 reaches a certain pressure, indicating complete contact between the two contacting quick-connect assemblies. This prevents leakage of heat transfer oil due to incomplete contact. The contact between adjacent ball valves 14 causes the corresponding elastic rod 13 to contract, preventing the ball valve 14 from blocking the corresponding conduit 12. The heat transfer oil in the upper flow channel 602 can then flow into the heat sink 11. This automatically connects the oil circuit after the battery pack 111 is replaced, ensuring normal circulation of the heat transfer oil and allowing the battery pack 111 in the battery box 4 to dissipate heat effectively.This effectively avoids the risk of thermal runaway of the battery. Under normal conditions, the contact pressure of adjacent ball valves 14 is equal. If the battery pack 111 expands and deforms after prolonged use, the sidewall of the heat sink 11 will be squeezed, causing a change in the flow rate within the heat sink 11. This, in turn, changes the pressure on the corresponding ball valve 14, allowing the ball valve 14 to monitor the status of the battery pack 111 and ensure its safe and stable operation.

[0032] Example 2: Based on Example 1, according to Figures 5-10 As shown, it also includes an electric push rod 15; two electric push rods 15 are installed on the lower heat-conducting plate 6, distributed on the left and right; all electric push rods 15 are in contact with the upper heat-conducting plate 6; the battery box 4 is provided with a movable cover plate 401; the cover plate 401 is in contact with the upper heat-conducting plate 6; a manifold 402 is opened in the cover plate 401; a number of first pressure relief holes 403 are opened at the lower part of the manifold 402; each first pressure relief hole 403 corresponds to a battery pack 111; a number of second pressure relief holes 404 are opened on the left and right sides of the manifold 402; a number of toothed grooves are opened on the upper limiting ring 601; each second pressure relief hole 404 corresponds to a toothed groove.

[0033] It also includes a pressure relief pipe 16; several evenly distributed pressure relief pipes 16 are fixedly connected to the heat-conducting plate 6 above; the pressure relief pipes 16 are connected to the manifold 402.

[0034] Based on the above embodiments, considering that while fully utilizing the coordinated management of internal and external heat circulation, the all-terrain vehicle body 1 may require extremely high output power during actual driving to cope with extreme road conditions such as climbing hills or muddy conditions, and that providing high output through high current will also generate high heat, which can easily lead to short circuits, overheating, or even battery spontaneous combustion and explosion, the existing technology generally uses lithium iron phosphate batteries, which have much higher thermal stability than ternary lithium batteries and a higher thermal runaway initiation temperature, reducing the risk from the material source. However, this method cannot fully resolve the problem of battery thermal runaway. It is also necessary to use battery management system technology to continuously monitor parameters such as resistance and voltage within the battery pack 111 in real time, use algorithms to identify abnormal states that may cause thermal runaway of the battery pack 111, and promptly issue alarms to remind the driver and passengers to perform maintenance.

[0035] When the battery pack 111 operates at high rate for an extended period, the electrolyte inside the battery pack 111 will evaporate. If the gas generated by the battery pack 111 is not guided, the battery box 4 will bulge and deform. Therefore, a pressure relief pipe 16 is provided. When gas is generated inside the battery pack 111, the gas will first enter the manifold 402 through the first pressure relief hole 403, and then be discharged from the manifold 402 through the pressure relief pipe 16. This guides the gas and prevents it from accumulating inside the battery box 4, which would cause the battery box 4 to bulge and deform. The main components of the electrolyte vapor are flammable gases such as hydrogen, carbon monoxide, and hydrocarbons. When the pressure relief pipe 16 passes through the upper flow channel 602, which has flowing heat transfer oil, the heat transfer oil can cool down the gas passing through the pressure relief pipe 16, preventing the high-temperature gas from being ignited after being discharged from the pressure relief pipe 16, thus ensuring the safe discharge of the gas.

[0036] If thermal runaway occurs in battery pack 111, the temperature of battery pack 111 will rise rapidly, and the gas generated inside battery pack 111 will also increase sharply. It is impossible to quickly release it through pressure relief pipe 16 alone. Therefore, a more direct emergency measure is required to open battery box 4, which has experienced thermal runaway, to release the pressure and heat inside. When the built-in pressure sensor of ball valve 14 detects abnormal heat and pressure inside battery pack 111, it immediately cuts off the flow of heat-conducting fluid in the internal circulation thermal management unit. Then, it controls the electric push rod 15 to extend, so that the electric push rod 15 lifts the upper heat-conducting plate 6, separating the heat-conducting plate 6 from the cover plate 401. Due to the heat and pressure inside, the cover plate 401 on battery box 4 is also lifted, so that the cover plate 401 is pressed against the heat-conducting plate 6. When the second pressure relief hole 404 is higher than the electric push rod 111, the heat-conducting plate 6 is lifted off the battery box 111. When the battery pack 111 is at the top of the battery box 4, the electric stop lever 15 is controlled to stop. At this time, the pressure inside the battery box 4 forces the air inside into the manifold 402 through the first pressure relief hole 403, and then discharges it through the second pressure relief hole 404. At this time, the limiting ring 601 is not separated from the battery box 4, and the limiting ring 601 still plays a limiting role for the battery box 4. At the same time, the toothed groove on the limiting ring 601 corresponds to the second pressure relief hole 404, so that the pressure released in the manifold 402 can be discharged through the toothed groove on the limiting ring 601. This realizes rapid and directional pressure release when the heat and pressure of the battery pack 111 inside the battery box 4 are abnormal, avoiding the battery pack 111 inside the battery box 4 from exploding like a pressure cooker, effectively ensuring the safety of the driver and passengers, and buying time for the driver and passengers to handle the fault or escape.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new energy all-terrain vehicle, comprising an all-terrain vehicle body (1) and a battery protection box (2); wherein the battery protection box (2) is disposed on the all-terrain vehicle body (1); characterized in that: It also includes an external circulation thermal management unit; the external circulation thermal management unit is connected inside the battery protection box (2); the external circulation thermal management unit is connected to two heat conduction plates (6); the battery box (4) is connected between the two heat conduction plates (6); The external circulation thermal management unit is used for air cooling of the battery box (4); the battery protection box (2) is connected to the internal circulation thermal management unit; the internal circulation thermal management unit is used for liquid cooling of the battery box (4); the internal circulation thermal management unit is connected to two heat-conducting plates (6) respectively; the two heat-conducting plates (6) are connected to each other; several limiting rods (7) are fixedly connected to the left and right sides of the battery protection box (2); the two heat-conducting plates (6) are slidably connected to all the limiting rods (7); several springs (8) are fixedly connected between the two heat-conducting plates (6); each limiting rod (7) passes through the middle of a spring (8).

2. A new energy all-terrain vehicle according to claim 1, characterized in that: The two heat-conducting plates (6) are coated with an aerogel heat-insulating coating on their opposite sides.

3. A new energy all-terrain vehicle according to claim 1, characterized in that: The external circulation thermal management unit includes a fan (3) and a shock absorber (5); two fans (3) are installed at the front of the battery protection box (2); several shock absorbers (5) are fixedly connected to the lower and upper parts of the battery protection box (2), and the shock absorbers (5) are made of heat-resistant sponge material; the two heat conduction plates (6) are fixedly connected to the adjacent shock absorbers (5) on opposite sides; an air inlet (201) is opened at the upper part of the battery protection box (2); an exhaust port (202) is opened at the front of the battery protection box (2).

4. A new energy all-terrain vehicle according to claim 3, characterized in that: Both the air inlet (201) and the exhaust outlet (202) are equipped with filters.

5. A new energy all-terrain vehicle according to claim 1, characterized in that: The internal circulation thermal management unit includes a pump (9); the pump (9) is installed at the rear of the battery protection box (2); a thermostat (10) is installed at the rear of the battery protection box (2); the pump (9) is connected to the thermostat (10); each heat conduction plate (6) has a flow channel (602); the pump (9) is connected to the upper flow channel (602); the thermostat (10) is connected to the lower flow channel (602); the upper heat conduction plate (6) is provided with a quick-connect assembly; the lower heat conduction plate (6) is provided with two quick-connect assemblies. The battery box (4) is equipped with a quick-connect assembly; a heat sink (11) is fixedly connected inside the battery box (4); the heat sink (11) is a hollow plate; a quick-connect assembly is connected to the upper part of the heat sink (11); two quick-connect assemblies are provided at the lower part of the heat sink (11); the quick-connect assemblies on the heat sink (11) are respectively in contact with the quick-connect assemblies on the adjacent heat-conducting plates (6); a number of battery packs (111) are detachably installed inside the battery box (4); the adjacent battery packs (111) are separated by the heat sink (11).

6. A new energy all-terrain vehicle according to claim 5, characterized in that: The combined quick connector assembly includes a conduit (12); the heat-conducting plate (6) is connected to the conduit (12); the conduit (12) is equipped with an elastic rod (13); the extension part of the elastic rod (13) is fixedly connected to a ball valve (14); the ball valve (14) is in contact with the end of the conduit (12); the end of the conduit (12) is provided with a round hole, the diameter of which is smaller than the diameter of the ball valve (14); the diameter of the ball valve (14) is smaller than the diameter of the conduit (12); a pressure sensor is provided inside the ball valve (14).

7. A new energy all-terrain vehicle according to claim 6, characterized in that: Each of the two heat-conducting plates (6) is fixed with a limiting ring (601) on the opposite side; both limiting rings (601) are in contact with the battery box (4).

8. A new energy all-terrain vehicle according to claim 7, characterized in that: The limiting ring (601) is made of heat-resistant and flame-retardant rubber.

9. A new energy all-terrain vehicle according to claim 7, characterized in that: It also includes electric push rods (15); two electric push rods (15) are installed on the lower heat-conducting plate (6) and distributed on the left and right; all the electric push rods (15) are in contact with the upper heat-conducting plate (6); the battery box (4) is provided with a movable cover plate (401); the cover plate (401) is in contact with the upper heat-conducting plate (6); a manifold (402) is opened in the cover plate (401); a number of first pressure relief holes (403) are opened at the lower part of the manifold (402); each of the first pressure relief holes (403) corresponds to a battery pack (111); a number of second pressure relief holes (404) are opened on the left and right sides of the manifold (402); a number of toothed grooves are opened on the upper limiting ring (601); each of the second pressure relief holes (404) corresponds to a toothed groove.

10. A new energy all-terrain vehicle according to claim 9, characterized in that: It also includes a pressure relief pipe (16); several uniformly distributed pressure relief pipes (16) are fixedly connected inside the upper heat-conducting plate (6); the pressure relief pipes (16) are connected to the manifold (402).

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