Liquid cooling device and vehicle

Abstract

This application provides a liquid cooling device and a vehicle, relating to the field of vehicle technology. The liquid cooling device includes a heat exchange assembly and a cooling terminal. The heat exchange assembly includes a housing and a cooler. The housing has a cavity, and the housing has an inlet and an outlet communicating with the cavity. The cooler is mounted on the housing, and at least partially extends into the housing. The cooler has a cooling chamber, and the cooler has an inlet and an outlet communicating with the outside at a position outside the housing. The cooling terminal includes a liquid cooling plate, which is installed inside the high-pressure box, and the liquid cooling plate can circulate with the liquid in the housing through the inlet and outlet. The liquid cooling device of this application can effectively cool and dissipate heat from the high-pressure box, preventing overheating of the high-pressure connector and internal copper busbars. Therefore, it is not necessary to increase the size of the connector and conductors, and the volume and weight of the high-pressure box can be reduced accordingly, avoiding any impact on the overall vehicle layout.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a liquid cooling device and a vehicle. Background Technology

[0002] With the development of electric vehicles, the charging power of power batteries is increasing exponentially.

[0003] In related technologies, as charging power increases, high-voltage boxes for power batteries require larger high-voltage connectors. With increased charging and discharging power, the current required to pass through also increases. To prevent overheating of the connectors and internal copper busbars, the dimensions of the connectors and conductors are typically increased. However, this directly leads to an increase in the size and weight of the high-voltage box, increasing the complexity of the overall vehicle layout. Utility Model Content

[0004] In order to at least address some of the deficiencies mentioned in the related technologies, this application provides a liquid cooling device and a vehicle.

[0005] To achieve the above objectives, a liquid cooling device is provided for cooling a high-pressure chamber in a vehicle. The liquid cooling device includes a heat exchange assembly and a cooling terminal. The heat exchange assembly includes a housing and a cooler. The housing has a cavity, and an inlet and an outlet communicating with the cavity are provided on the housing. The cooler is mounted on the housing, and at least partially extends into the housing. The cooler has a cooling chamber, and an inlet and an outlet communicating with the outside are provided on the cooler located outside the housing. The cooling terminal includes a liquid cooling plate, which is installed inside the high-pressure chamber. Liquid in the liquid cooling plate can flow into the housing through the inlet, and liquid in the housing can flow out into the liquid cooling plate through the outlet.

[0006] Furthermore, a power component is provided inside the cavity to drive the liquid flowing into the cavity from the inlet and flowing out of the housing from the outlet.

[0007] Furthermore, a magnetic coupler is provided on the housing near the liquid outlet, the power component is mounted on the inner rotor of the magnetic coupler, the outer rotor of the magnetic coupler is located at a corresponding position on the outer wall of the housing, and a motor is mounted on the outer rotor.

[0008] Furthermore, the cooler includes a cooling plate and a cooling rod, both of which have chambers for the flow of cooling medium, and the chambers in the cooling plate and the cooling rod are in communication. The cooling plate is located outside the housing, the inlet and the outlet are both located on the cooling plate, and the cooling rod is at least partially inserted into the interior of the housing.

[0009] Furthermore, the cooling plate is vertically arranged and parallel to at least one side of the housing, and the cooling rods are vertically connected to the cooling plate in the horizontal direction. A plurality of cooling rods are evenly distributed on the cooling plate.

[0010] Furthermore, the cooler includes two cooling plates, which are respectively disposed on both sides of the housing. A cooling rod is disposed between the two cooling plates and penetrates the housing, with its two ends respectively connected to the cooling plates on both sides of the housing.

[0011] Furthermore, a heat dissipation fin is provided on the side of the cooling plate away from the cooling rod, and multiple heat dissipation fins are evenly distributed on the cooling plate.

[0012] Furthermore, the inlet is located on the cooling plate, and the outlet is located on another cooling plate opposite to the cooling plate.

[0013] Furthermore, both the inlet and the outlet are configured as circular holes, with the diameter of the inlet being L1 and the diameter of the outlet being L2, satisfying: L1 > L2.

[0014] This application provides a vehicle, including a vehicle body, a high-pressure box, and the liquid cooling device described in any of the above embodiments. The vehicle body includes a compressor and a refrigeration system. The high-pressure box is mounted on the vehicle body. The cooling terminal is installed inside the high-pressure box, and the inlet and outlet of the cooler are connected to the refrigeration system of the compressor in the vehicle body.

[0015] With the above technical solution, when using the liquid cooling device of this application to cool the high-pressure box, the liquid cooling plate is placed in a suitable position inside the high-pressure box, and thermally conductive silicone grease is filled between the liquid cooling plate and the high-pressure box. The liquid inside the liquid cooling plate then exchanges heat with the high-pressure box, absorbing the heat generated by the high-pressure box. After absorbing heat, the liquid inside the liquid cooling plate continuously flows into the housing through the inlet via a pipe, where it contacts the cooler and exchanges heat. The cooler then cools the liquid flowing into the housing. The cooled liquid flows out from the outlet of the housing and returns to the liquid cooling plate through a pipe. Repeating the above process maintains the liquid cooling plate at a relatively low temperature, thus cooling the high-pressure box.

[0016] The liquid cooling device of this application can effectively cool and dissipate heat from the high-voltage box, preventing the high-voltage connector and internal copper busbar from overheating. Therefore, there is no need to increase the size of the connector and conductor, and the volume and weight of the high-voltage box will also be reduced accordingly, avoiding any impact on the overall vehicle layout.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Fig. 1 A schematic diagram of the structure of the liquid cooling device provided in the embodiments of this application from one perspective; Fig. 2 This is a schematic diagram of the heat exchange component provided in an embodiment of this application from one perspective. Fig. 3 This is a schematic diagram of the cooler provided in an embodiment of this application.

[0020] icon: 100-Heat exchange assembly; 110-Shell; 111-Cavity; 112-Inlet; 113-Outlet; 114-Power component; 115-Magnetic coupler; 116-Motor; 120-Cooler; 121-Cooling plate; 122-Cooling rod; 123-Inlet; 124-Outlet; 300-High pressure box. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] This embodiment provides a liquid cooling device to solve the problem in related technologies where, in order to prevent overheating of the copper busbars inside the high-voltage connector and high-voltage box, the volume and size of the high-voltage box and high-voltage connector are increased, resulting in a large volume and heavy weight of the high-voltage box, which affects the overall vehicle layout.

[0025] Please see Figs. 1-3 This embodiment provides a liquid cooling device for cooling a high-pressure chamber 300 in a vehicle. The liquid cooling device includes a heat exchange assembly 100 and a cooling terminal. The heat exchange assembly 100 includes a housing 110 and a cooler 120. A cavity 111 is formed inside the housing 110, and an inlet 112 and an outlet 113 communicating with the cavity 111 are formed on the housing 110. The cooler 120 is mounted on the housing 110, and at least partially extends into the housing 110. A cooling chamber is formed inside the cooler 120, and an inlet 123 and an outlet 124 communicating with the outside are formed on the cooler 120 located outside the housing 110. The cooling terminal includes a liquid cooling plate, which is installed inside the high-pressure chamber 300. Liquid in the liquid cooling plate can flow into the housing 110 through the inlet 112, and liquid in the housing 110 can flow out into the liquid cooling plate through the outlet 113.

[0026] Specifically, the liquid cooling plate in the liquid cooling system is installed inside the high-pressure chamber 300, close to or near the main heat source. To maximize heat transfer efficiency, thermally conductive silicone grease is filled between the liquid cooling plate and the inner wall of the high-pressure chamber 300 or the heat-generating components to eliminate air gaps and ensure that heat can be transferred quickly and efficiently from the heat-generating components to the liquid cooling plate. The coolant flows within the channels of the liquid cooling plate, absorbing heat from the high-pressure chamber 300 and its internal components, thereby increasing its own temperature.

[0027] High-temperature coolant, having absorbed heat, flows out from the liquid cooling plate and enters the cavity 111 inside the housing 110 of the liquid cooling device through a pipe and inlet 112. Inside the housing 110, the high-temperature coolant makes full contact with the outer wall of the cooler 120. The cooler 120 is an independent heat exchange unit with an internal cooling chamber and an inlet 123 and an outlet 124 connected to an external refrigeration system. An external low-temperature cooling medium, such as coolant or refrigerant, flows in from the inlet 123 of the cooler 120, passes through the cooling chamber, carries away the heat from the high-temperature coolant in the cavity 111 of the housing 110, and then flows out from the outlet 124. This achieves heat exchange between the circulating coolant inside the housing 110 and the external refrigeration system, thereby lowering the temperature of the coolant inside the housing 110.

[0028] The cryogenic coolant, cooled by the cooler 120, flows out from the outlet 113 of the casing 110. The cryogenic coolant then flows back through pipes to the liquid cooling plate inside the high-pressure tank 300, starting a new round of heat absorption and cooling cycle.

[0029] This embodiment effectively solves the high-power heat dissipation problem. Through direct and efficient liquid cooling, it removes heat generated in critical locations such as the high-voltage box 300 and high-voltage connectors, fundamentally resolving the heat dissipation bottleneck under high-power conditions without increasing component size. Since excessively large connectors and conductors are eliminated for heat dissipation, the internal space occupied by the high-voltage box 300 is significantly reduced. This results in a reduction in both the volume and weight of the high-voltage box 300, achieving compactness and lightweighting of key components, optimizing the overall vehicle layout, and increasing design freedom.

[0030] In one embodiment, exemplarily, such as Fig. 3 As shown, a power component 114 is installed inside the cavity 111 to drive the liquid flowing into the cavity 111 from the inlet 112 and out through the outlet 113 to the outside of the housing 110. In related technologies, the flow of coolant in the cavity 111 of the housing 110 usually relies mainly on the driving force of an external main circulation pump. When the coolant flows through the cavity 111 of the housing 110, it needs to exchange heat sufficiently with the outer wall of the cooler 120, which generates a certain flow resistance. If the main pump is not powerful enough or the pipeline is too long, the flow rate inside the housing 110 may slow down, affecting the heat exchange efficiency. In this embodiment, a power component 114 is integrated inside the housing 110, which can actively drive the coolant entering the cavity 111, forcing it to flow over the surface of the cooler 120 at a higher flow rate. The higher flow rate means stronger convective heat transfer capacity, which can transfer heat from the coolant to the cooler 120 more quickly, thereby significantly improving the heat exchange efficiency inside the housing 110. This makes the entire liquid cooling system more efficient in heat dissipation, enabling it to meet higher power cooling requirements.

[0031] Furthermore, traditional liquid cooling systems typically rely on a centralized, high-power main circulation pump to drive the coolant throughout the entire loop. If the main pump malfunctions or its performance degrades, the entire cooling system will be affected. In this embodiment, however, the power unit 114 is integrated within the housing 110 of the liquid cooling device, effectively placing the power source within the heat dissipation unit itself. This makes the liquid cooling device a more complete and independent modular unit, reducing the pressure on the external main circulation system. Even if the performance of the external main pump fluctuates, the built-in power unit 114 ensures efficient heat exchange circulation within the housing 110, improving the reliability of the entire cooling system.

[0032] In one embodiment, exemplarily, such as Figs. 1-3 As shown, a magnetic coupler 115 is installed on the housing 110 near the liquid outlet 113. A power component 114 is mounted on the inner rotor of the magnetic coupler 115, and the outer rotor of the magnetic coupler 115 is positioned on the corresponding location on the outer wall of the housing 110, with a motor 116 mounted on it. In a liquid circulation system, one of the biggest safety hazards is liquid leakage. If the power component 114, such as the motor 116 of a pump, directly passes through the wall of the housing 110 for driving, a dynamic seal (such as a mechanical seal or oil seal) must be installed at the wall penetration point. However, these dynamic seals operate under high pressure, high temperature, and high-speed rotation conditions for extended periods, making them highly susceptible to failure due to wear, aging, or impurity intrusion, leading to coolant leakage. Once high-pressure coolant leaks, it not only reduces cooling efficiency but may also cause short circuits, corrosion, or even safety accidents.

[0033] In this embodiment, the magnetic coupler 115 utilizes the principle of magnetic fields penetrating non-magnetic materials for power transmission. The outer rotor rotates outside the housing 110, and its magnetic field passes through the wall of the housing 110, driving the inner rotor inside the housing 110 to rotate synchronously. The transmission process does not require any physical shaft to pass through the housing 110. Therefore, the housing 110 can be made into a completely closed, static sealed cavity, connected to the outside world only through the liquid inlet 112 and the liquid outlet 113. This fundamentally eliminates the risk of leakage caused by the failure of the rotating shaft seal, greatly improving the inherent safety and long-term operational reliability of the system.

[0034] Because there are no easily worn dynamic seals, this embodiment has fewer potential points of failure. As long as the magnet performance is stable and the bearings are well lubricated, the entire drive system can achieve an ultra-long service life. This makes the liquid cooling device more maintenance-free, making it particularly suitable for commercial vehicles where frequent maintenance is difficult or for applications with extremely high reliability requirements.

[0035] Furthermore, the motor 116 and the outer rotor are mounted outside the housing 110, which is a dry area. If the motor 116 or the outer rotor malfunctions, maintenance personnel can directly repair or replace it without disassembling the housing 110 or draining the coolant. This simplifies the maintenance process, shortens repair time, and reduces maintenance costs.

[0036] In one embodiment, exemplarily, such as Figs. 1-3 As shown, the cooler 120 includes a cooling plate 121 and a cooling rod 122. Both the cooling plate 121 and the cooling rod 122 have chambers for the flow of cooling medium, and these chambers communicate with each other. The cooling plate 121 is located outside the housing 110, with an inlet 123 and an outlet 124 both located on it. The cooling rod 122 is at least partially inserted into the interior of the housing 110. The heat exchange efficiency between the cooler 120 and the high-temperature coolant in the cavity 111 of the housing 110 directly depends on their contact area. The cooling rod 122, as an extension of the cooling plate 121, extends into the cavity 111 of the housing 110, directly exposed to the flowing high-temperature coolant. This is equivalent to inserting a heat dissipation column into the high-temperature coolant. The outer surface of the cooling rod 122 is in direct contact with the coolant in the cavity 111 of the housing 110, forming a direct heat exchange interface. With the addition of the external cooling plate 121, the total heat exchange area of ​​the entire cooler 120 is increased several times over. A larger heat exchange area means that more heat can be transferred per unit time, thereby significantly improving the overall heat exchange efficiency and heat dissipation capacity.

[0037] Dead zones or uneven flow rates may exist in the coolant flow within the cavity 111 of the housing 110, leading to insufficient heat exchange. The cooling rod 122 inserted into the cavity 111 alters the geometry of the flow channel, guiding and turbulent the flow of coolant. The cooling rod 122 can break up any laminar flow that may form, promoting turbulence and allowing the high-temperature coolant to make more thorough contact with the surface of the cooling rod 122. This helps eliminate localized hot spots, ensuring a more uniform temperature distribution of the coolant within the cavity 111 of the housing 110, and preventing overheating in some areas while other areas experience insufficient heat exchange.

[0038] In one embodiment, exemplarily, such as Figs. 1-3 As shown, the cooling plate 121 is vertically arranged, and at least one side of the cooling plate 121 is parallel to the housing 110. Cooling rods 122 are vertically connected to the cooling plate 121 along the horizontal direction. Multiple cooling rods 122 are evenly distributed on the cooling plate 121. When the cooling plate 121 is vertically arranged, conditions favorable for natural convection are created on its surface by the air or the surrounding environment. Hot air, being less dense, rises naturally along the vertical surface, bringing in cool air and forming a continuous convection cycle. For the cooling plate 121 itself, vertical installation maximizes the utilization of natural air convection, effectively dissipating heat even without forced air cooling, thus improving the heat dissipation efficiency of the cooling plate 121 itself.

[0039] The evenly distributed cooling rods 122 are located on the main flow channel of the coolant. When the coolant flows in from the inlet 112 to the outlet 113, it must pass laterally through the gaps between the cooling rods 122. This arrangement forces the coolant to change its flow direction, increasing the fluid velocity and turbulence, effectively breaking down the thermal resistance layer adhering to the surface of the cooling rods 122, thereby greatly enhancing the convective heat transfer coefficient between the cooling rods 122 and the coolant. The evenly distributed multiple cooling rods 122 ensure that the flow and heat transfer are enhanced across the entire flow channel cross-section, avoiding localized low flow velocities or insufficient heat transfer.

[0040] For example, please continue reading Figs. 1-3 The cooler 120 includes two cooling plates 121, which are respectively disposed on both sides of the housing 110. A cooling rod 122 is disposed between the two cooling plates 121 and penetrates the housing 110, with its two ends connected to the cooling plates 121 on both sides of the housing 110. Both cooling plates 121 are exposed to the external environment and can exchange heat with the external cooling medium, thus doubling the heat exchange area.

[0041] Furthermore, the cooling rod 122 is no longer inserted from one side, but rather extends completely through the housing 110, with its entire length immersed in high-temperature coolant, resulting in a larger contact area with the fluid inside the housing 110. Heat can be conducted and dissipated from any point on the cooling rod 122 to the cooling plates 121 on both sides via the shortest path, forming a bidirectional, symmetrical heat dissipation network.

[0042] During vehicle operation, the liquid cooling system is subjected to continuous vibration and impact. If the cooling rod 122 is a cantilever beam, it is prone to vibration fatigue. The through-type design transforms the cooling rod 122 from a cantilever beam into a simply supported beam at both ends, significantly improving its structural stability. The cooling plates 121 on both sides are connected and supported by the through rod, forming an I-beam or truss structure for the entire cooler 120 frame. This enhances the mechanical strength and vibration resistance of the entire cooler 120, effectively preventing fatigue fracture, loosening, or noise caused by vibration, and significantly improving the long-term reliability of the device in harsh vehicle environments.

[0043] In one embodiment, exemplarily, such as Figs. 1-3As shown, heat dissipation fins are provided on the side of the cooling plate 121 away from the cooling rod 122, and multiple heat dissipation fins are evenly distributed on the cooling plate 121. The heat dissipation capacity is directly proportional to the heat exchange area. The surface area of ​​the cooling plate 121 itself is limited, which is the bottleneck for external heat dissipation. Without significantly increasing the overall volume, the heat dissipation fins, by attaching a large number of thin and dense metal sheets to the surface of the cooling plate 121, increase the contact area between the cooling plate 121 and the external environment by several times or even tens of times. When the external air flows through these fins, it can carry away more heat. Since the cooling rod 122 efficiently conducts internal heat to the cooling plates 121 on both sides, and the cooling plates 121 quickly dissipate heat to the outside through the dense heat dissipation fins, an efficient heat dissipation chain is formed, thereby comprehensively improving the overall heat dissipation capacity of the entire liquid cooling device.

[0044] Vertically arranged heat dissipation fin arrays can more effectively guide hot air upwards, creating a chimney effect and enhancing natural convection circulation, maintaining good heat dissipation performance even without a fan. For forced convection, the evenly distributed heat dissipation fins provide numerous flow channels for airflow. As airflow passes through the fin gaps, its velocity increases, turbulence intensifies, and the thermal boundary layer on the fin surface is stripped away more efficiently, significantly improving the convective heat transfer coefficient. Of course, in this embodiment, the shape and spacing of the fins are not limited and can be optimized according to actual conditions to adapt to different wind speeds and heat dissipation requirements, achieving the best balance between wind resistance and heat dissipation.

[0045] In one embodiment, exemplarily, such as Figs. 1-3 As shown, inlet 123 is located on cooling plate 121, and outlet 124 is located on another cooling plate 121 opposite to it. In traditional same-plate inlet / outlet designs, the cooling medium may follow a short, localized path, resulting in some areas of the cooling plate 121 and cooling rod 122 not being fully utilized. With the "one-side inlet, opposite-side outlet" design, the cooling medium must enter from one cooling plate 121, flow through the internal channel of the through-type cooling rod 122 connecting the two plates, and finally exit from the other cooling plate 121. This extends the flow path of the cooling medium from the length of a single plate to the entire length of the through-type cooling rod, maximizing the path. A longer flow path means the cooling medium stays in the cooler 120 for a longer time, with longer contact time with the cooling rod 122 and cooling plate 121, thus absorbing and carrying away more heat and improving the heat exchange efficiency per unit flow rate of the cooling medium.

[0046] Because the cooling medium must flow through all the through-type cooling rods 122 connecting the cooling plates 121 on both sides to reach the outlet 124, the cooling medium is forced to be evenly distributed into the flow channels of each cooling rod 122. This ensures that all cooling rods 122 participate in the heat exchange process, avoiding the phenomenon that some rods may have high flow rates, while others may have low flow rates or even no flow rates, which could occur due to improper flow channel design. All cooling rods 122 bear the heat dissipation task equally, improving the balance and reliability of the entire heat dissipation system.

[0047] In one embodiment, for example, both inlet 123 and outlet 124 are circular orifices, with inlet 123 having a diameter of L1 and outlet 124 having a diameter of L2, satisfying L1 > L2. Fluid entering a narrow channel experiences significant local resistance, leading to a sudden pressure drop. The larger inlet diameter 123 means a lower initial flow velocity of the cooling medium entering the cooler 120 system. This lower inlet velocity significantly reduces the impact and turbulence as the fluid enters the cooling plate 121 channel, thereby reducing local pressure loss at the inlet. This helps reduce the overall pressure drop of the cooling loop, allowing for a lower head required by the external circulation pump, thus saving pump energy and improving system efficiency.

[0048] With a constant flow rate, a smaller outlet diameter 124 results in a higher flow velocity of the cooling medium at outlet 124. The high-velocity cooling medium, when entering the external radiator or piping, can more effectively exchange heat with the external environment, improving the overall efficiency of the cooling system. After startup or maintenance of the liquid cooling system, air may remain in the piping. A higher outlet velocity 124 helps flush air bubbles out of the system, preventing air blockage, ensuring the continuity and stability of the cooling medium circulation, and improving the reliability of system operation.

[0049] This embodiment provides a vehicle, including a vehicle body, a high-pressure box, and a liquid cooling device as described in any of the above embodiments. The vehicle body includes a compressor and a refrigeration system. The high-pressure box is mounted on the vehicle body. A cooling terminal is installed inside the high-pressure box 300, and the inlet 123 and outlet 124 of the cooler 120 are connected to the refrigeration system of the compressor in the vehicle body.

[0050] The vehicle provided in this embodiment includes the liquid cooling device in any of the above embodiments, and thus possesses all the beneficial effects of the liquid cooling device, which will not be elaborated further here.

[0051] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0052] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid cooling device for cooling a high-pressure tank of a vehicle, characterized by, The liquid cooling device includes: A heat exchange assembly (100) includes a housing (110) and a cooler (120). The housing (110) has a cavity (111) inside it, and the housing (110) has an inlet (112) and an outlet (113) communicating with the cavity (111). The cooler (120) is mounted on the housing (110) and the cooler (120) extends at least partially into the housing (110). The cooler (120) has a cooling chamber inside, and the cooler (120) has an inlet (123) and an outlet (124) connected to the outside at the position outside the housing (110). The cooling terminal includes a liquid cooling plate installed inside the high-pressure box (300). Liquid in the liquid cooling plate can flow into the housing (110) through the liquid inlet (112), and liquid in the housing (110) can flow out into the liquid cooling plate through the liquid outlet (113).

2. The liquid cooling device of claim 1, wherein, The heat exchange assembly (100) also includes a power component (114), which is disposed in the cavity (111) and is used to drive the liquid flowing into the cavity (111) from the liquid inlet (112) and flowing out from the liquid outlet (113) to the outside of the housing (110).

3. The liquid cooling device of claim 2, wherein, A magnetic coupler (115) is provided on the housing (110) near the liquid outlet (113). The power component (114) is installed on the inner rotor of the magnetic coupler (115). The outer rotor of the magnetic coupler (115) is located at the corresponding position on the outer wall of the housing (110), and a motor (116) is installed on the outer rotor.

4. The liquid cooling device of claim 1, wherein, The cooler (120) includes a cooling plate (121) and a cooling rod (122). Both the cooling plate (121) and the cooling rod (122) have chambers for the flow of cooling medium, and the chambers in the cooling plate (121) and the cooling rod (122) are in communication. The cooling plate (121) is located outside the housing (110), the inlet (123) and the outlet (124) are both opened on the cooling plate (121), and the cooling rod (122) is at least partially inserted into the interior of the housing (110).

5. The liquid cooling device of claim 4, wherein, The cooling plate (121) is vertically arranged and is parallel to at least one side of the housing (110). The cooling rod (122) is vertically connected to the cooling plate (121) in the horizontal direction. The cooling plate (121) is provided with a plurality of cooling rods (122) evenly distributed on it.

6. The liquid cooling device of claim 5, wherein, The cooler (120) includes two cooling plates (121), and the two cooling plates (121) are respectively disposed on both sides of the housing (110); The cooling rod (122) is disposed between the two cooling plates (121) and penetrates the housing (110). The two ends of the cooling rod (122) are respectively connected to the cooling plates (121) on both sides of the housing (110).

7. The liquid cooling device of claim 5, wherein, The cooling plate (121) is provided with heat dissipation fins on the side away from the cooling rod (122), and multiple heat dissipation fins are evenly distributed on the cooling plate (121).

8. The liquid cooling device of claim 6, wherein, The inlet (123) is located on the cooling plate (121), and the outlet (124) is located on another cooling plate (121) opposite to the cooling plate (121).

9. The liquid cooling device according to claim 1, characterized in that, Both the inlet (123) and the outlet (124) are set as circular holes. The diameter of the inlet (123) is L1 and the diameter of the outlet (124) is L2, satisfying: L1 > L2.

10. A vehicle characterized by comprising: Includes the vehicle body, the high-pressure box, and the liquid cooling device as described in any one of claims 1 to 9; The vehicle body includes a compressor and a refrigeration system; the high-pressure box is mounted on the vehicle body. The cooling terminal is installed inside the high-pressure box (300), and the inlet (123) and outlet (124) of the cooler (120) are connected to the refrigeration system of the compressor of the vehicle body.

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