High-voltage distribution box and automobile

Abstract

The utility model discloses a high-voltage distribution box and an automobile, the high-voltage distribution box comprises a shell, a plurality of electrical components, at least one connecting conductor and a heat dissipation assembly, the shell is provided with a containing cavity and comprises a bottom plate, and the bottom plate is used for defining the containing cavity; the plurality of electrical components are arranged in the accommodating cavity; the connecting conductor comprises a first conductor and at least two second conductors arranged at intervals, at least part of the first conductor is embedded in the bottom plate, and the side face, away from the containing cavity, of the first conductor is exposed out of the side, away from the containing cavity, of the bottom plate. The at least two second conductors are conductively connected with the first conductor, at least parts of the second conductors are located in the accommodating cavity, and one end, far away from the first conductor, of each second conductor is conductively connected with the electrical component; the density of the first conductor is smaller than that of the second conductor; the heat dissipation assembly is connected to the side, away from the containing cavity, of the bottom plate. The heat dissipation assembly is attached to at least part of the side face, away from the containing cavity, of the first conductor. The high-voltage distribution box can rapidly and effectively dissipate heat, and the overall weight is small.

Description

Technical Field

[0001] This application belongs to the field of power distribution box technology, specifically relating to a high-voltage power distribution box and an automobile. Background Technology

[0002] High-voltage distribution boxes are used to meet the needs of battery charging and discharging scenarios. In automotive electrical systems, they are key components for battery energy, providing current distribution and control for battery charging and discharging. However, during battery charging and discharging, the connecting conductors, due to the large current they carry, can overheat, leading to the failure of the high-voltage distribution box. Utility Model Content

[0003] The purpose of this utility model is to provide a high-voltage distribution box, which aims to solve the problem that the connecting conductors of existing high-voltage distribution boxes may overheat and fail due to the large current they carry during charging and discharging. Another purpose of this application is to provide an automobile.

[0004] Technical solution: A high-voltage distribution box according to an embodiment of this application includes:

[0005] A housing having a receiving cavity, the housing including a base plate for enclosing the receiving cavity;

[0006] Multiple electrical components are disposed within the receiving cavity;

[0007] At least one connecting conductor, the connecting conductor comprising:

[0008] A first conductor is at least partially embedded in the base plate, and the side of the first conductor away from the receiving cavity protrudes from the side of the base plate away from the receiving cavity;

[0009] At least two second conductors are spaced apart and are electrically connected to the first conductor. At least a portion of the second conductor is located within the receiving cavity. The end of the second conductor away from the first conductor is electrically connected to the electrical component. The density of the first conductor is less than the density of the second conductor.

[0010] A heat dissipation assembly is connected to the side of the base plate away from the receiving cavity, and the heat dissipation assembly is at least partially attached to the side of the first conductor away from the receiving cavity.

[0011] Accordingly, the automobile described in this application includes a high-voltage distribution box as described in any of the foregoing embodiments.

[0012] Beneficial Effects: Compared with the prior art, a high-voltage distribution box according to an embodiment of this application includes a housing, multiple electrical components, at least one connecting conductor, and a heat dissipation assembly. The housing has a receiving cavity and includes a bottom plate for enclosing the receiving cavity. Multiple electrical components are disposed within the receiving cavity. The connecting conductor includes a first conductor and at least two second conductors spaced apart. At least a portion of the first conductor is embedded in the bottom plate, and the side of the first conductor away from the receiving cavity protrudes from the side of the bottom plate away from the receiving cavity. At least two second conductors are electrically connected to the first conductor, and at least a portion of the second conductor is located within the receiving cavity. The end of the second conductor away from the first conductor is electrically connected to the electrical components. The density of the first conductor is less than the density of the second conductor. The heat dissipation assembly is connected to the side of the bottom plate away from the receiving cavity, and the heat dissipation assembly is in contact with at least a portion of the side of the first conductor away from the receiving cavity. By embedding the first conductor in the bottom plate and exposing it from the side of the bottom plate away from the receiving cavity, and combining this with the heat dissipation assembly in contact with the first conductor, this application achieves rapid and effective heat dissipation of the first conductor, thereby improving the current carrying capacity of the connecting conductor and facilitating higher charging and discharging rates of the power battery. Meanwhile, the first conductor is connected to the second conductor, and the second conductor is connected to the electrical components. This allows the heat from the electrical components to reach the first conductor through the second conductor, and then dissipate heat to heat exchange elements such as thermal management components through the heat dissipation components. This results in higher heat dissipation efficiency for the high-voltage distribution box, thereby ensuring the safety of the high-voltage distribution box. In addition, the density of the first conductor is lower than that of the second conductor. Compared to using the second conductor as the connecting conductor as the whole, this can effectively reduce the weight of the connecting conductor without affecting the electrochemical performance of the connection between the connecting conductor and the electrical components.

[0013] Compared with the prior art, an embodiment of the automobile in this application includes a high-voltage distribution box as described in any of the foregoing embodiments. It is understood that the automobile of this application includes all the technical features and effects of the aforementioned high-voltage distribution box, which will not be repeated here. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-voltage distribution box according to an embodiment of this application;

[0016] Figure 2 This is an exploded view of a high-voltage distribution box according to an embodiment of this application;

[0017] Figure 3 yes Figure 2 Enlarged view of section A;

[0018] Figure 4 yes Figure 2 Enlarged view of section B;

[0019] Figure 5 This is a schematic diagram of the overall structure of the connection between the housing and the connecting conductor of a high-voltage distribution box according to an embodiment of this application;

[0020] Figure 6 This is a bottom view of the high-voltage distribution box without heat dissipation components according to an embodiment of this application;

[0021] Figure 7 This is a bottom view of the high-voltage distribution box with heat dissipation components according to an embodiment of this application.

[0022] Reference numerals: 100, housing; 110, receiving cavity; 120, base plate; 130, covering structure; 200, electrical components; 300, connecting conductor; 310, first conductor; 311, first body; 312, first connecting segment; 320, second conductor; 321, second body; 322, second connecting segment; 400, heat dissipation assembly; 410, first silicone thermal conductive layer; 420, insulating film; 430, second silicone thermal conductive layer. Detailed Implementation

[0023] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles from 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles from 10° is considered parallel.

[0025] The new energy vehicle sector is booming, with more and more OEMs starting to research and manufacture new energy vehicles. High-voltage distribution boxes are used to meet the needs of battery charging and discharging scenarios. As a key component of battery energy in automotive electrical systems, they provide current distribution and control for battery charging and discharging, and serve as an effective carrier for circuit safety protection and heat dissipation. Currently, conventional high-voltage distribution boxes mainly use a one-piece pure copper electrical connection conductor design, relying on increasing the cross-sectional area of ​​the copper busbar for surface heat dissipation. However, with the increasing price of copper, the cost is rising, and simply increasing the heat dissipation area of ​​the copper material results in extremely low heat dissipation efficiency, limiting the improvement in the charging and discharging current carrying capacity. Specifically, during charging, the internal electrical circuit of the high-voltage distribution box will continuously generate heat throughout the charging process. Under peak current, the temperature rise of the copper busbar increases sharply. If effective heat dissipation is not provided, it will lead to the failure of the high-voltage distribution box or even thermal runaway.

[0026] In view of this, embodiments of this application provide a high-voltage distribution box and an automobile, aiming to solve the above-mentioned problems.

[0027] Please refer to the following: Figures 1-3 and Figures 5-7This application provides a high-voltage distribution box, including a housing 100, a plurality of electrical components 200, at least one connecting conductor 300, and a heat dissipation assembly 400. The housing 100 has a receiving cavity 110 and includes a base plate 120 for enclosing the receiving cavity 110. The plurality of electrical components 200 are disposed within the receiving cavity 110. The connecting conductor 300 includes a first conductor 310 and at least two second conductors 320 spaced apart. At least a portion of the first conductor 310 is embedded in the base plate 120, and the first conductor 310 is located away from the receiving cavity 110. The side of 10 is exposed from the side of the base plate 120 away from the receiving cavity 110; at least two second conductors 320 are electrically connected to the first conductor 310, at least a portion of the second conductors 320 is located inside the receiving cavity 110, and the end of the second conductor 320 away from the first conductor 310 is electrically connected to the electrical component 200; the density of the first conductor 310 is less than the density of the second conductor 320; the heat dissipation assembly 400 is connected to the side of the base plate 120 away from the receiving cavity 110, and the heat dissipation assembly 400 is in contact with at least a portion of the side of the first conductor 310 away from the receiving cavity 110.

[0028] In this embodiment, by embedding the first conductor 310 within the base plate 120 and exposing it from the side of the base plate 120 away from the receiving cavity 110, and combining it with the heat dissipation assembly 400 attached to the first conductor 310, rapid and effective heat dissipation of the first conductor 310 is achieved. This improves the current carrying capacity of the connecting conductor 300 and facilitates higher charging and discharging rates for the power battery. Simultaneously, the first conductor 310 is connected to the second conductor 320, which in turn is connected to the electrical components 200. This allows heat from the electrical components 200 to reach the first conductor 310 via the second conductor 320, and then dissipate heat through the heat dissipation assembly 400 to heat exchange elements such as thermal management components. This results in higher heat dissipation efficiency for the high-voltage distribution box, ensuring its safety. Furthermore, the density of the first conductor 310 is lower than that of the second conductor 320. Compared to using the second conductor 320 as the entire connecting conductor 300, this effectively reduces the weight of the connecting conductor 300 without affecting the electrochemical performance of the connection between the connecting conductor 300 and the electrical components 200.

[0029] It should be noted that the high-voltage distribution box in this embodiment has a short heat dissipation path and high heat dissipation efficiency. Specifically, the heat dissipation component 400 is in contact with the side of the first conductor 310 embedded in the base plate 120 and exposed. Since the first conductor 310 carries a large current and is prone to heat generation, this design allows heat to be quickly transferred from the first conductor 310 to the heat dissipation component 400. Compared with the traditional design, this reduces the accumulation of heat inside the distribution box, greatly improves the heat dissipation efficiency, effectively solves the problem of excessive temperature of the connecting conductor 300, thereby improving the current carrying capacity of the connecting conductor 300 and enhancing the safety of the high-voltage distribution box.

[0030] In addition, the high-voltage distribution box of this application embodiment can control heat dissipation from the source. The first conductor 310 is at least partially embedded in the base plate 120, and the heat dissipation component 400 is in direct contact with the first conductor 310. This is equivalent to starting heat dissipation treatment from the source of heat generation, avoiding the impact of heat on other electrical components 200 during the conduction process, and better ensuring the stable operation of all components in the entire high-voltage distribution box.

[0031] It should also be noted that embedding the first conductor 310 within the base plate 120 can effectively reduce the occupancy of the internal dimensions of the receiving cavity 110, thereby reducing the height of the high-voltage distribution box and making the overall structure of the high-voltage distribution box more compact, which is beneficial for installation and use in environments with limited space, such as automobiles.

[0032] It should also be noted that the first conductor 310 typically occupies a large volume or length within the connecting conductor 300. Using a low-density material for the first conductor 310 effectively reduces the overall weight of the connecting conductor 300 in the high-voltage distribution box while maintaining its electrical performance. For applications such as automobiles where weight is a strict requirement, this helps improve energy efficiency, reduce energy consumption, and increase driving range. Simultaneously, using a low-density material for the first conductor 310 allows for effective cost control while meeting functional requirements such as conductivity and heat dissipation, making the product more competitive in the market.

[0033] It should also be noted that embedding the first conductor 310 within the base plate 120 provides excellent fixation for the first conductor 310, preventing it from shifting due to vibration or other reasons during vehicle operation, thereby ensuring the stability and conductivity of the connection.

[0034] It is understood that, in this embodiment of the application, at least a portion of the first conductor 310 is embedded within the base plate 120. This can be either entirely embedded within the base plate 120 or only partially embedded. At least a portion of the second conductor 320 is exposed within the receiving cavity 110 and is electrically connected to the electrical component 200. The second conductor 320 connects the electrical component 200 and the first conductor 310, and transfers heat from the electrical component 200 to the first conductor 310. The multiple electrical components 200 may include relays and fuses. When the first conductor 310 connects to at least two second conductors 320, a conductive connection between adjacent electrical components 200 can be achieved.

[0035] It is also understandable that, since each electrical component 200 has a certain volume and there is a certain distance between their respective connection terminals, there must be at least a certain distance between two adjacent second conductors 320 to allow each second conductor 320 to be connected to two different electrical components 200. Therefore, the first conductor 310 has a large length along the arrangement direction of the electrical components 200. Correspondingly, while ensuring sufficient flow area between the first conductor 310 and the second conductor 320, the width of the first conductor 310 will not be too small. Therefore, the first conductor 310 will have a relatively large heat dissipation area, and thus there will also be a large heat exchange area between the first conductor 310 and the heat dissipation component 400, which can achieve faster heat dissipation.

[0036] It should also be noted that, preferably, the width of the first conductor 310 in this embodiment is greater than the width of the second conductor 320, which ensures that there is a large current flow area between the two while giving the first conductor 310 a larger heat dissipation area and achieving higher heat dissipation efficiency.

[0037] Of course, in this embodiment, the number of connecting conductors 300 and the number of second conductors 320 connecting conductors 300 can be reasonably configured according to the different numbers of electrical components 200, as specifically as follows: Figure 2 The high-voltage distribution box shown can have multiple connecting conductors 300. Depending on the position of the electrical components 200 connected to the connecting conductors 300, the shape of the corresponding first conductor 310 will be different, and the number of second conductors 320 connected to the first conductor 310 will also be different.

[0038] It should also be noted that the housing 100 in this embodiment can be an integrally injection-molded plastic insulating housing 100, and the connecting conductor 300 can be integrally injection-molded together with the housing 100 to form a housing 100 with the connecting conductor 300, such as... Figure 2 and Figure 5 As shown. In some embodiments, the connecting conductor 300 is pre-embedded in the housing 100, which can eliminate the assembly step, improve production efficiency, and ensure the stability of the connecting conductor 300.

[0039] In some embodiments, the first conductor 310 is an aluminum plate and the second conductor 320 is a copper plate.

[0040] In some embodiments of this application, since the first conductor 310 connects at least two second conductors 320, the amount of the first conductor 310 used is greater than the amount of the second conductor 320. Compared to a connecting conductor 300 made entirely of copper, a copper-aluminum composite connecting conductor 300 can effectively reduce the amount of copper used. Aluminum material weighs about one-third of copper, which significantly reduces the weight of the high-voltage distribution box, thus facilitating the overall lightweighting of the battery. In addition, aluminum is cheaper than copper, saving copper material and effectively reducing costs. At the same time, aluminum plate itself has good thermal conductivity, which can effectively transfer heat to the battery's thermal management components through the heat dissipation component 400 while reducing costs, achieving efficient heat dissipation and effectively solving the risk of thermal runaway under high current.

[0041] like Figure 5 As shown, in some embodiments, the housing 100 includes a plurality of spaced-apart covering structures 130, which are disposed within the receiving cavity 110 and integrally connected to the base plate 120; the first conductor 310 includes a first body 311 and at least two spaced-apart first connecting segments 312, which are integrally connected to the first body 311, the first body 311 being embedded in the base plate 120, and at least a portion of the first connecting segments 312 being embedded in the covering structures 130; the second conductor 320 includes a second body 321 and a second connecting segment 322, which are integrally connected to the second body 321, the second connecting segment 322 being disposed along its thickness direction on one side of the first connecting segment 312 and electrically connected to the first connecting segment 312, and at least a portion of the second connecting segment 322 being embedded in the covering structures 130; the second body 321 is provided with a through hole and is electrically connected to the electrical component 200.

[0042] In this embodiment, by integrally connecting the covering structure 130 with the base plate 120, and by simultaneously covering the composite portion of the first connecting segment 312 and the second connecting segment 322 with the covering structure 130, a better fixing effect on the first conductor 310 and the second conductor 320 can be achieved, improving the overall structural stability. Simultaneously, by using the covering structure 130 to protect the connection portion of the first connecting segment 312 and the second connecting segment 322, the stability of the connection between the first conductor 310 and the second conductor 320 can be guaranteed, and the reliability of the electrical connection can be improved.

[0043] In some embodiments, the first connecting segment 312 and the second connecting segment 322 are welded together.

[0044] In this embodiment, the first connecting segment 312 and the second connecting segment 322 are welded together, which enables them to have better connection strength and further ensures the stability of their connection.

[0045] In some embodiments, the heat dissipation component 400 is a flexible component.

[0046] In this embodiment, the heat dissipation component 400 is configured as a flexible component. In this case, the heat dissipation component 400 can be deformed under compression. When the high-voltage distribution box is connected to the thermal management components (liquid cooling plate, etc.) in the battery pack, the heat dissipation component 400 is deformed by compression and fully contacts the base plate 120 and the first conductor 310. This facilitates the close contact and heat dissipation between the heat dissipation component 400 and the base plate 120 and the first conductor 310, which is beneficial to improving the heat dissipation efficiency.

[0047] Please refer to the following: Figure 2 and Figure 4 In some embodiments, the heat dissipation assembly 400 includes a first silicone thermal conductive layer 410, which is disposed on the side of the base plate 120 away from the receiving cavity 110 and connected to the base plate 120. The first silicone thermal conductive layer 410 is attached to the side of the first conductor 310 away from the receiving cavity 110.

[0048] In this embodiment, the first silicone thermally conductive layer 410 has good deformability and thermal conductivity, and can fully contact the first conductor 310 and the base plate 120 to achieve effective heat conduction and dissipation. The first silicone thermally conductive layer 410 can be adhesively bonded to the base plate 120 and the first conductor 310.

[0049] Please refer to the following: Figure 2 and Figure 4 In some embodiments, the heat dissipation assembly 400 further includes an insulating film 420, which is disposed on the side of the first silicone thermal conductive layer 410 away from the base plate 120 and is attached to the first silicone thermal conductive layer 410.

[0050] In this embodiment, the insulating film 420 can further improve the insulation characteristics of the heat dissipation component 400, thereby effectively preventing leakage and other faults caused by the exposed part of the first conductor 310 contacting the internal metal structure of the battery pack.

[0051] Specifically, considering the durability of the first silicone thermal conductive layer 410 under high temperature conditions, by attaching an insulating film 420 to the side of the first silicone thermal conductive layer 410 away from the base plate 120, the insulation can be further enhanced, and the insulation of the heat dissipation component 400 can be maintained even when the first silicone thermal conductive layer 410 has local cracks.

[0052] Please refer to the following: Figure 2 and Figure 4 In some embodiments, the heat dissipation assembly 400 further includes a second silicone thermal conductive layer 430, which is disposed on the side of the insulating film 420 away from the first silicone thermal conductive layer 410 and is attached to the insulating film 420.

[0053] In this embodiment, a second silicone thermally conductive layer 430 is provided on the side of the insulating film 420 away from the first silicone thermally conductive layer 410. When the heat dissipation assembly 400 comes into contact with the thermal management components of the battery pack, the deformation capability of the second silicone thermally conductive layer 430 allows for more thorough contact between the second silicone thermally conductive layer 430 and the thermal management components, thereby ensuring effective heat dissipation. Simultaneously, by attaching the second silicone thermally conductive layer 430 to the side of the insulating film 420 away from the first silicone thermally conductive layer 410, effective protection of the insulating film 420 is achieved, preventing scratches when the surfaces of structures such as thermal management components are uneven or have excessive surface roughness.

[0054] like Figure 7 As shown, in some embodiments, the orthographic projection of the heat dissipation assembly 400 on the base plate 120 completely covers the first conductor 310.

[0055] In this embodiment, by ensuring that the orthographic projection of the heat dissipation component 400 on the base plate 120 completely covers the first conductor 310, the heat dissipation component 400 can completely shield the first conductor 310 after being attached to the base plate 120, thereby ensuring the insulation of the first conductor 310. Preferably, the area and shape of the heat dissipation component 400 are the same as the area and shape of the base plate 120, thereby achieving full coverage of the base plate 120 by the heat dissipation component 400. This ensures both high heat dissipation efficiency and the overall stability of the high-voltage distribution box.

[0056] This application also provides a vehicle, including a high-voltage distribution box as described in any of the foregoing embodiments. It is understood that the vehicle of this application includes all the technical features and effects of the aforementioned high-voltage distribution box, which will not be repeated here. Of course, the vehicle in this application embodiment can be an electric vehicle or a hybrid electric vehicle, etc.

[0057] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0058] The above provides a detailed description of a high-voltage distribution box and an automobile provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A high-voltage distribution box, characterized in that, include: A housing (100) having a receiving cavity (110), the housing (100) including a base plate (120) for surrounding the receiving cavity (110); Multiple electrical components (200) are disposed within the receiving cavity (110); At least one connecting conductor (300), the connecting conductor (300) comprising: A first conductor (310) is at least partially embedded in the base plate (120), and the side of the first conductor (310) away from the receiving cavity (110) is exposed from the side of the base plate (120) away from the receiving cavity (110); At least two second conductors (320) are spaced apart and are electrically connected to the first conductor (310). At least a portion of the second conductor (320) is located within the receiving cavity (110). The end of the second conductor (320) away from the first conductor (310) is electrically connected to the electrical component (200). The density of the first conductor (310) is less than the density of the second conductor (320). A heat dissipation assembly (400) is connected to the side of the base plate (120) away from the receiving cavity (110), and the heat dissipation assembly (400) is at least partially attached to the side of the first conductor (310) away from the receiving cavity (110).

2. The high-voltage distribution box according to claim 1, characterized in that, The first conductor (310) is an aluminum plate, and the second conductor (320) is a copper plate.

3. The high-voltage distribution box according to claim 1, characterized in that, The housing (100) includes a plurality of spaced-apart covering structures (130), which are disposed within the receiving cavity (110) and integrally connected to the base plate (120); The first conductor (310) includes a first body (311) and at least two spaced first connecting segments (312). The first connecting segments (312) are integrally connected to the first body (311). The first body (311) is embedded in the base plate (120). At least a portion of the first connecting segments (312) is embedded in the covering structure (130). The second conductor (320) includes a second body (321) and a second connecting segment (322). The second connecting segment (322) is integrally connected to the second body (321). The second connecting segment (322) is disposed on one side of the first connecting segment (312) along its thickness direction and is electrically connected to the first connecting segment (312). At least a portion of the second connecting segment (322) is embedded in the covering structure (130). The second body (321) is provided with a through hole and is electrically connected to the electrical component (200).

4. The high-voltage distribution box according to claim 3, characterized in that, The first connecting segment (312) is welded to the second connecting segment (322).

5. The high-voltage distribution box according to claim 1, characterized in that, The heat dissipation component (400) is a flexible component.

6. The high-voltage distribution box according to claim 5, characterized in that, The heat dissipation assembly (400) includes a first silicone thermal conductive layer (410), which is disposed on the side of the base plate (120) away from the receiving cavity (110) and connected to the base plate (120). The first silicone thermal conductive layer (410) is attached to the side of the first conductor (310) away from the receiving cavity (110).

7. The high-voltage distribution box according to claim 6, characterized in that, The heat dissipation assembly (400) further includes an insulating film (420), which is disposed on the side of the first silicone thermal conductive layer (410) away from the base plate (120) and is attached to the first silicone thermal conductive layer (410).

8. The high-voltage distribution box according to claim 7, characterized in that, The heat dissipation assembly (400) further includes a second silicone thermal conductive layer (430), which is disposed on the side of the insulating film (420) away from the first silicone thermal conductive layer (410) and is attached to the insulating film (420).

9. The high-voltage distribution box according to claim 1, characterized in that, The orthographic projection of the heat dissipation assembly (400) onto the base plate (120) completely covers the first conductor (310).

10. A car, characterized in that, Includes the high-voltage distribution box as described in any one of claims 1-9.

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