High-voltage junction box and automobile

Abstract

The utility model discloses a high-voltage junction box and an automobile, the high-voltage junction box comprises a shell, a high-voltage circuit, a high-voltage socket and an access cover plate, the shell is provided with an accommodating cavity and an access hole, and the access hole is communicated with the accommodating cavity; the high-voltage circuit is arranged in the accommodating cavity; the high-voltage socket is arranged on one side of the access hole and is connected with the shell; the high-voltage socket is conductively connected with the high-voltage circuit and used for being connected with a high-voltage plug-in; the access cover plate comprises a main body, a safety bump and a safety locking piece, the main body is detachably connected with the shell and covers the access hole, and the safety bump is arranged on one side, close to the high-voltage socket, of the main body and is connected with the main body; and the safety locking piece is detachably connected with the safety convex block and the shell respectively, and is positioned below the high-voltage plug-in. The access cover plate comprises the safety bump and the safety locking piece, and the safety bump and the safety locking piece are positioned below the high-voltage plug-in butted with the high-voltage socket to form physical restriction, so that active power-off and cover opening are realized, and the access safety is effectively improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of junction boxes, and particularly relates to a high-voltage junction box and an automobile. BACKGROUND

[0002] The high-voltage junction box is a core component of a vehicle electrical / electronic system and is used as a battery energy distribution center in the automobile electrical field to distribute energy for a motor controller and electric accessories on the vehicle. The high-voltage junction box is provided with a high-voltage warning label on the surface of the shell to indicate a high-voltage danger. In particular, when the fuse is replaced by opening the maintenance cover, the high-voltage power must be disconnected first, and then the maintenance cover is opened. However, the operator may ignore the label or forget to disconnect the power and directly open the cover for maintenance, which may cause an electric shock risk. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to provide a high-voltage junction box to solve the problem that the existing junction box is directly opened without being disconnected during maintenance. Another object of the application is to provide an automobile.

[0004] TECHNICAL SCHEME: The high-voltage junction box of the application comprises a shell, a high-voltage circuit, a high-voltage socket, and a maintenance cover plate. The shell has a receiving cavity and a maintenance opening. The maintenance opening is in communication with the receiving cavity. The high-voltage circuit is arranged in the receiving cavity. The high-voltage socket is arranged on one side of the maintenance opening and connected with the shell. The high-voltage socket is electrically connected with the high-voltage circuit and used for connecting with a high-voltage plug-in. The maintenance cover plate comprises a main body, a fuse block, and a fuse locking member. The main body is detachably connected with the shell and covers the maintenance opening. The fuse block is arranged on one side of the main body close to the high-voltage socket and connected with the main body. The fuse locking member is detachably connected with the fuse block and the shell and located below the high-voltage plug-in.

[0005] Correspondingly, the automobile of the application comprises the high-voltage junction box of any one of the preceding embodiments.

[0006] Beneficial Effects: Compared with the prior art, a high-voltage junction box according to an embodiment of this application includes a housing, a high-voltage circuit, a high-voltage socket, and a maintenance cover. The housing has a receiving cavity and a maintenance port, and the maintenance port communicates with the receiving cavity. The high-voltage circuit is disposed in the receiving cavity. The high-voltage socket is disposed on one side of the maintenance port and connected to the housing. The high-voltage socket is electrically connected to the high-voltage circuit and is used to connect to the high-voltage plug. The maintenance cover includes a main body, a safety protrusion, and a safety locking member. The main body is detachably connected to the housing and covers the maintenance port. The safety protrusion is disposed on the side of the main body near the high-voltage socket and connected to the main body. The safety locking member is detachably connected to both the safety protrusion and the housing, and is located below the high-voltage plug. By setting the maintenance cover to cover the safety protrusion and the safety locking member, and placing the safety protrusion and the safety locking member below the high-voltage plug, when maintenance is required, the high-voltage plug blocks the safety protrusion and the safety locking member, forcing the operator to remove the high-voltage plug before opening the cover. This enables active power-off opening and effectively improves maintenance safety.

[0007] Compared with the prior art, an embodiment of the automobile of this application includes a high-voltage junction 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 junction box, which will not be repeated here. Attached Figure Description

[0008] 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.

[0009] Figure 1 This is a schematic diagram of the overall structure of a high-voltage junction box according to an embodiment of this application;

[0010] Figure 2 This is a top view of a high-voltage junction box after the inspection cover has been removed, according to an embodiment of this application.

[0011] Figure 3 This is a schematic diagram of the internal structure of a high-voltage junction box according to an embodiment of this application;

[0012] Figure 4 This is a front view of an insulating bracket connected to a high-voltage circuit according to an embodiment of this application;

[0013] Figure 5 This is a bottom view of an embodiment of the present application showing the connection between an insulating support and a high-voltage circuit;

[0014] Figure 6 This is a schematic diagram of the structure of an inspection cover according to an embodiment of this application;

[0015] Figure 7 This is a schematic diagram of the structure of a connector according to an embodiment of this application;

[0016] Figure 8 This is a schematic diagram of another connector structure according to an embodiment of this application;

[0017] Figure 9 This is a schematic diagram of the connection between a high-voltage junction box and a high-voltage plug-in according to an embodiment of this application.

[0018] Reference numerals: 100, housing; 110, receiving cavity; 120, inspection port; 130, positioning post; 200, high-voltage circuit; 210, fuse; 220, connector; 221, first section; 222, second section; 223, third section; 224, limiting hole; 300, high-voltage socket; 400, inspection cover; 410, main body; 420, safety protrusion; 430, safety locking element; 440, positioning hole; 500, wire harness fixing element; 600, insulating bracket; 610, positioning groove; 620, through hole; 630, plate; 640, partition; 650, first positioning part; 660, second positioning part; 661, first positioning element; 662, second positioning element; 700, high-voltage plug. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] High-voltage junction boxes, operating on the same principle as high-voltage distribution boxes, are core components of the high-voltage electrical / electronic systems of electric vehicles. In automotive electrical systems, they serve as the energy distribution center for the battery, distributing energy to the motor controller and other electric accessories. Many OEMs are now proposing 800V high-voltage platforms, which presents challenges for electrical safety and maintenance. Current junction boxes typically have high-voltage warning labels on their surfaces to indicate the danger. Especially when opening the access cover to replace a fuse, the high-voltage power must be disconnected before opening the cover, and this must be performed by professionally trained personnel. However, operators sometimes forget to disconnect the power before opening the cover, leading to a risk of electric shock.

[0022] In view of this, embodiments of this application provide a high-voltage junction box and an automobile, which aim to solve the above-mentioned problems.

[0023] Please refer to the following: Figures 1-6 and Figure 9This application provides a high-voltage junction box, including a housing 100, a high-voltage circuit 200, a high-voltage socket 300, and a maintenance cover 400. The housing 100 has a receiving cavity 110 and a maintenance port 120, which communicates with the receiving cavity 110. The high-voltage circuit 200 is disposed within the receiving cavity 110. The high-voltage socket 300 is disposed on one side of the maintenance port 120 and connected to the housing 100. The high-voltage socket 300 is electrically connected to the high-voltage circuit 200 and is used to connect to the high-voltage plug-in 700. The maintenance cover 400 includes a main body 410, a safety protrusion 420, and a safety locking member 430. The main body 410 is detachably connected to the housing 100 and covers the maintenance port 120. The safety protrusion 420 is disposed on the side of the main body 410 near the high-voltage socket 300 and connected to the main body 410. The safety locking member 430 is detachably connected to both the safety protrusion 420 and the housing 100, and is located below the high-voltage plug-in 700.

[0024] This application sets up a maintenance cover 400 with a safety bump 420 and a safety locking element 430, and positions the safety bump 420 and the safety locking element 430 below the high-voltage plug 700. When maintenance is required, the high-voltage plug 700 obstructs the safety bump 420 and the safety locking element 430, forcing the operator to first remove the high-voltage plug 700 before opening the cover. This enables active power-off opening of the cover, effectively improving maintenance safety.

[0025] Specifically, in the overall vehicle layout, space needs to be utilized rationally to maximize space utilization. The high-voltage junction box uses a high-voltage socket 300 to connect to a high-voltage plug-in 700, enabling conduction between the high-voltage junction box and the vehicle's electrical circuits. When the high-voltage plug-in 700 is disconnected from the high-voltage socket 300, the high-voltage junction box is in a de-energized state. However, the high-voltage junction box in this embodiment, through a unique structural design, places the safety protrusion 420 and safety locking member 430 below the high-voltage plug-in 700 after the high-voltage junction box is connected, forming a physical power-off constraint mechanism. This design eliminates the possibility of operators accidentally opening the cover while it is energized due to misoperation or negligence, greatly reducing the probability of electric shock accidents and providing a solid and reliable guarantee for the personal safety of operators. This design makes the opening and maintenance operation more standardized and regulated. Operators only need to follow the sequence of "first removing the high-voltage plug-in 700 and then opening the maintenance cover 400," reducing unnecessary steps and potential operational errors, and improving maintenance efficiency.

[0026] Furthermore, it should be noted that opening the inspection cover 400 of the high-voltage junction box while it is energized could potentially cause short circuits, overloads, or other problems due to improper operation, resulting in irreversible damage to core components such as the high-voltage circuit 200 and the high-voltage socket 300 inside the junction box. The active power-off opening design of this high-voltage junction box effectively avoids these risks of equipment damage caused by misoperation, extends the service life of the high-voltage junction box, and reduces equipment maintenance costs.

[0027] It is understood that the safety bump 420 in this embodiment is part of the access cover 400, and the safety bump 420 protrudes along the outer periphery of the main body 410 in a direction away from the access port 120, rather than protruding along the thickness direction of the access cover 400. The safety fastener may be a safety bolt, used to lock the access cover 400 onto the housing 100.

[0028] Furthermore, in some embodiments of this application, the safety bump 420 is integrally connected to the main body 410. In this case, the maintenance cover 400 can be directly integrally formed, which is convenient for production and manufacturing, while ensuring the overall strength of the maintenance cover 400 is uniform and ensuring structural stability.

[0029] It should be noted that the main body 410 of the inspection cover 400 in this embodiment of the application is provided with fixing holes, and multiple bolts are inserted into the fixing holes and detachably locked to the housing 100.

[0030] like Figure 1 and Figure 2 In some embodiments, the high-voltage junction box further includes a wiring harness fixing member 500, which is connected to the housing 100 and protrudes outward from the housing 100. The wiring harness fixing member 500 is disposed on the side of the safety locking member 430 away from the high-voltage socket 300. The wiring harness fixing member 500 is used to fix the end of the high-voltage plug-in 700 away from the high-voltage socket 300, and to position at least a portion of the safety locking member 430 and the safety protrusion 420 below the high-voltage plug-in 700.

[0031] In this embodiment, by setting up a wire harness fixing member 500, after the high-voltage plug-in 700 is plugged into the high-voltage socket 300, the subsequent wire harness portion can be tied to the wire harness fixing member 500 by flexible fixing members such as cable ties. At this time, the high-voltage plug-in 700 will span above the safety protrusion 420 and the safety locking member 430, which can further limit the position of the high-voltage plug-in 700, thereby further ensuring the physical restraint of the high-voltage plug-in 700 on the operator and improving maintenance safety.

[0032] Specifically, a wiring harness fixing component 500 is added and positioned on the side of the safety locking component 430 away from the high-voltage socket 300. Simultaneously, it ensures that at least a portion of the safety locking component 430 and the safety protrusion 420 are located below the high-voltage plug-in 700, further improving the safety mechanism for active power-off cover opening. When an operator attempts to open the maintenance cover 400, the high-voltage plug-in 700 obstructs the safety protrusion 420 and the safety locking component 430; only by first removing the high-voltage plug-in 700 can this obstruction be removed. This design eliminates the possibility of operator error in opening the cover for maintenance without powering off, significantly reducing the risk of electric shock and providing more reliable safety for operators. Furthermore, fixing the wiring harness with the wiring harness fixing component 500 helps optimize the wiring layout, making the wiring layout of the high-voltage plug-in 700 more organized and orderly. This not only helps reduce tangling and wear between wiring harnesses, lowering the risk of electrical accidents caused by line faults, but also improves the overall stability and reliability of the high-voltage junction box. During vehicle operation, vehicles will encounter various complex road conditions. The wiring harness fastener 500 can effectively prevent the high-voltage plug 700 from loosening or shifting due to vibration, bumps, or other factors, ensuring that the high-voltage circuit 200 always maintains a good conductive connection.

[0033] It is understood that the wire harness fastener 500 in this application embodiment can be a bolt, wherein one end of the bolt is screwed into or embedded in the housing 100, and the other end extends out of the housing 100 for connecting flexible fasteners (such as cable ties).

[0034] like Figures 3-5 As shown, in some embodiments, the high-voltage junction box further includes an insulating support 600, which is disposed in the receiving cavity 110 and connected to the housing 100, and a portion of the high-voltage circuit 200 is connected to the insulating support 600.

[0035] In this embodiment of the application, by setting the insulating bracket 600, the high-voltage circuit 200 can be supported in the receiving cavity 110 of the housing 100, which is beneficial to the support and fixation of each electrical component and connector 220 in the high-voltage circuit 200, and also helps to improve the insulation between adjacent wire harness connection points or adjacent electrical components, thereby improving the safety of the junction box.

[0036] Specifically, a portion of the high-voltage circuit 200 can be positioned on the side of the insulating support 600 near the access port 120, while another portion is fixed on the side of the insulating support 600 away from the access port 120. Meanwhile, a wiring harness will be connected to the corresponding wiring socket (such as the high-voltage socket 300, etc. Other sockets are not covered in this application and will not be described in detail here) to realize the input and output of the junction box.

[0037] It should be noted that this application uses an insulating bracket 600 fixed within the receiving cavity 110 of the housing 100 to secure the high-voltage circuit 200. This secures the high-voltage circuit 200, ensuring the stability of the conductive connections between its components. Furthermore, the support and fixation of the high-voltage circuit 200, coupled with its excellent insulation and stable circuit condition, helps extend the service life of the high-voltage junction box and the entire high-voltage circuit 200 system. This reduces damage to the components of the high-voltage circuit 200 caused by leakage, short circuits, and other problems, lowering the frequency of component replacement and thus improving equipment durability. This not only reduces vehicle maintenance costs but also improves vehicle reliability and operational efficiency.

[0038] like Figure 4 , Figure 7 and Figure 8 As shown, in some embodiments, the insulating bracket 600 has a positioning groove 610 on the side facing the inspection port 120, and the positioning groove 610 is disposed opposite to the inspection port 120; the insulating bracket 600 also has a through hole 620, which communicates with the positioning groove 610; the high-voltage circuit 200 includes a fuse 210 and a connector 220, the fuse 210 is disposed in the positioning groove 610 and is fixedly connected to the insulating bracket 600; the connector 220 includes a first segment 221, a second segment 222 and a third segment 223 connected in sequence, the first segment 221 is disposed in the positioning groove 610 and is electrically connected to the fuse 210, the second segment 222 passes through the through hole 620, and the third segment 223 is disposed on the side of the insulating bracket 600 away from the inspection port 120, for connecting the high-voltage wire harness.

[0039] In this embodiment of the application, by setting the positioning groove 610, the fuse 210 is effectively fixed and limited. At the same time, the positioning groove 610 can partially wrap and isolate the fuse 210, thereby achieving insulation isolation between the fuse 210 and adjacent electrical components and wiring harnesses, thus improving the safety inside the junction box and effectively protecting the fuse 210.

[0040] In addition, this application sets the positioning groove 610 opposite to the inspection port 120. At this time, the fuse 210 located in the positioning groove 610 is also opposite to the inspection port 120. This allows maintenance personnel to quickly disassemble and install the fuse 210 when opening the cover for maintenance, thereby improving the replacement efficiency of the fuse 210.

[0041] It is understood that the fuse 210 in this embodiment can be an electrical device such as a fuse. The connector 220 can be a copper busbar to ensure good current carrying capacity.

[0042] In addition, it should be noted that the first segment 221 and the third segment 223 of the connector 220 are located on both sides of the insulating bracket 600, and are respectively connected to the fuse 210 and the wire harness. This enables the transfer of circuits on both sides of the insulating bracket 600, which is convenient for maintenance personnel to open the maintenance cover 400 to inspect the fuse 210, and also facilitates the assembly of the production line on the side of the insulating bracket 600 away from the fuse 210, reducing assembly time and thus improving assembly efficiency.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments, the insulating support 600 includes a plate 630, a plurality of partitions 640, and a plurality of through holes 620. The plate 630 is connected to the housing 100. The plurality of partitions 640 are spaced apart and all connected to the plate 630. Two adjacent partitions 640 and the plate 630 form a positioning groove 610. The plurality of through holes 620 penetrate the plate 630. The high-voltage circuit 200 includes a plurality of fuses 210 and a plurality of connectors 220. The plurality of fuses 210 are respectively disposed in the plurality of positioning grooves 610, and the plurality of fuses 210 are exposed from the inspection port 120. The plurality of connectors 220 are respectively disposed in the plurality of through holes 620, and each connector 220 is electrically connected to a fuse 210.

[0044] In this embodiment, multiple partitions 640 are spaced apart and connected to the plate body 630 to form multiple positioning grooves 610, which can respectively support multiple fuses 210 arranged side by side. This allows fuses 210 to be installed in multiple branches of the high-voltage circuit 200, thereby further improving the safety of the high-voltage circuit 200 in the junction box. By allowing the fuses 210 to melt in time under overcurrent conditions, the electrical safety of the entire vehicle can be protected.

[0045] It should be noted that the multiple fuses 210 are separated by a partition 640, which can improve the insulation performance between adjacent fuses 210 and increase the creepage distance, thereby helping to protect the high-voltage circuit 200 and reduce the occurrence of leakage short circuits.

[0046] In some embodiments, the sides of the plurality of first segments 221 facing the access port 120 are coplanar.

[0047] In this embodiment, by setting multiple first segments 221 to have coplanar sides facing the inspection port 120, the height of the multiple first segments 221 facing the inspection port 120 is consistent, which can keep the connection position of the fuse 210 in a plane. At this time, the fuse 210 can be kept at a certain height when connected, avoiding the reduction in service life caused by bending and breaking of the fuse 210.

[0048] like Figure 4As shown, in some embodiments, the insulating bracket 600 includes a first positioning part 650, which is connected to the side of the plate 630 facing the inspection port 120; the first positioning part 650 is disposed on the outer peripheral side of the through hole 620 and is used to position the first segment 221.

[0049] In this embodiment of the application, by providing the first positioning part 650, the first segment 221 can be positioned, thereby limiting the fixed position of the first segment 221 of the connector 220, which facilitates subsequent wiring and maintains the stability of the position of the connector 220.

[0050] Of course, the first positioning part 650 in this embodiment can be groove-shaped, column-shaped, or protruding. When the first positioning part 650 is groove-shaped, the connecting member can be as follows: Figure 7 As shown, the corresponding first segment 221 is directly inserted into the slot to achieve circumferential positioning; if the first positioning part 650 is protruding, the connector 220 can be as follows: Figure 7 As shown, it can abut against one side of the first segment 221 to achieve positioning and limiting; if the first positioning part 650 is cylindrical, the connecting part 220 can be as follows: Figure 8 As shown, a corresponding limiting hole can be set in the first segment 221, and the columnar first positioning part 650 passes through the limiting hole to realize the positioning and limiting of the first segment 221.

[0051] like Figure 5 As shown, in some embodiments, the insulating bracket 600 includes a second positioning part 660, which is connected to the side of the plate 630 away from the inspection port 120; the second positioning part 660 is disposed on the outer periphery of the through hole 620 and is used to position the third segment 223.

[0052] In this embodiment of the application, by setting the second positioning part 660, the third segment 223 can be positioned and limited. At this time, in combination with the first positioning part 650 and the second positioning part 660, the connector 220 can be effectively positioned, and the connector 220 and the insulating bracket 600 can be mutually positioned to keep the position of the connector 220 fixed, which facilitates subsequent wiring.

[0053] like Figure 5 As shown, in some embodiments, the second positioning part 660 includes two first positioning members 661 and a second positioning member 662. The two first positioning members 661 are disposed opposite to each other on both sides of the third segment 223 and connected to the plate body 630. The second positioning member 662 is disposed on the side of the third segment 223 away from the through hole 620 and connected to the plate body 630. The second positioning member 662, the two first positioning members 661 and the plate body 630 form a positioning space.

[0054] In this embodiment of the application, by setting two first positioning members 661 and one second positioning member 662 together, a positioning space with open sides is formed with the plate body 630. At this time, it is convenient for the third segment 223 to be installed into the positioning space and to achieve effective positioning of the third segment 223, avoiding displacement, and at the same time, it is convenient for the third segment 223 to be connected to the wire harness.

[0055] like Figure 1 , Figure 2 and Figure 6 As shown, in some embodiments, the housing 100 is provided with a plurality of positioning posts 130 on the side facing the inspection cover 400, the inspection cover 400 has a plurality of positioning holes 440, and the plurality of positioning posts 130 are inserted into the plurality of positioning holes 440 in a one-to-one correspondence, one of the positioning holes 440 passing through the safety protrusion 420.

[0056] In this embodiment, multiple positioning posts 130 are provided on the housing 100, which cooperate with multiple positioning holes 440 provided on the inspection cover 400. One of the positioning holes 440 passes through the safety protrusion 420. At this time, the corresponding positioning post 130 also passes through the positioning hole 440 on the safety protrusion 420. Meanwhile, the corresponding positioning post 130 is located between the wire harness fixing member 500 and the high-voltage socket 300. This further ensures that the safety protrusion 420 can be located between the high-voltage socket 300 and the wire harness fixing member 500. At this time, after the high-voltage plug 700 is connected to the high-voltage socket 300 and the wire harness fixing member 500 respectively, it can block the safety protrusion 420 and the safety locking member 430. This achieves the forced disconnection of the connection between the high-voltage plug 700 and the high-voltage socket 300, and the removal of the high-voltage plug 700, so that the connection between the safety locking member 430 and the safety protrusion 420 can be made.

[0057] Accordingly, this application also provides a vehicle that includes a high-voltage junction box as described in any of the foregoing embodiments.

[0058] 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.

[0059] The above provides a detailed description of a high-voltage junction box and 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 terminal box, characterized in that The high-voltage junction box comprises a shell (100) having a containing cavity (110) and an access opening (120) in communication with the containing cavity (110); a high-voltage circuit (200) arranged in the containing cavity (110); a high-voltage socket (300) arranged on one side of the access opening (120) and connected with the shell (100); the high-voltage socket (300) is in conductive connection with the high-voltage circuit (200) and is used for connecting with a high-voltage plug-in component (700); an access cover plate (400) comprising: a main body (410) detachably connected with the shell (100) and covering the access opening (120); a safety protrusion (420) arranged on one side of the main body (410) close to the high-voltage socket (300) and connected with the main body (410); a safety locking component (430) detachably connected with the safety protrusion (420) and the shell (100) and located below the high-voltage plug-in component (700). The high-voltage junction box further comprises a wire harness fixing component (500) connected with the shell (100) and protruding outside the shell (100), the wire harness fixing component (500) being arranged on one side of the safety locking component (430) away from the high-voltage socket (300); the wire harness fixing component (500) is used for fixing one end of the high-voltage plug-in component (700) away from the high-voltage socket (300) and making at least part of the safety locking component (430) and the safety protrusion (420) located below the high-voltage plug-in component (700). The high-voltage junction box further comprises an insulating support (600) arranged in the containing cavity (110) and connected with the shell (100), and part of the high-voltage circuit (200) is connected with the insulating support (600).

4. The high-voltage junction box according to claim 3, wherein one side of the insulating support (600) facing the access opening (120) is provided with a positioning groove (610) arranged opposite to the access opening (120); the insulating support (600) further has a through hole (620) in communication with the positioning groove (610); the high-voltage circuit (200) comprises: a fuse (210) arranged in the positioning groove (610) and fixedly connected with the insulating support (600); a connecting component (220) comprising a first segment (221), a second segment (222) and a third segment (223) connected in sequence, the first segment (221) being arranged in the positioning groove (610) and being in conductive connection with the fuse (210), the second segment (222) being arranged in the through hole (620), and the third segment (223) being arranged on one side of the insulating support (600) away from the access opening (120) and being used for connecting a high-voltage wire harness.

5. The high-voltage junction box according to claim 4, wherein the insulating support (600) comprises: ​ ​ ​ 2. The high-voltage junction box according to claim 1, characterized in that ​ 3. The high-voltage junction box according to claim 1, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ a plate body (630) connected with the shell (100); a plurality of partitions (640) arranged at intervals and each connected with the plate body (630), and two adjacent partitions (640) and the plate body (630) forming a positioning groove (610); a plurality of through holes (620) penetrating the plate body (630); the high-voltage circuit (200) comprises: a plurality of fuses (210) arranged one by one in the plurality of positioning grooves (610); and the plurality of fuses (210) are exposed from the maintenance opening (120); a plurality of connecting pieces (220) arranged one by one in the plurality of through holes (620), and each connecting piece (220) is in conductive connection with one fuse (210).

6. The high-voltage junction box according to claim 5, characterized in that The side surfaces of the plurality of first segments (221) facing the maintenance opening (120) are coplanar.

7. The high-voltage junction box according to claim 5, characterized in that The insulating support (600) comprises a first positioning part (650) connected to one side of the plate body (630) facing the maintenance opening (120); and the first positioning part (650) is arranged on the outer circumferential side of the through hole (620) and is used for positioning the first segment (221).

8. The high-voltage junction box according to claim 7, characterized in that The insulating support (600) comprises a second positioning part (660) connected to one side of the plate body (630) away from the maintenance opening (120); and the second positioning part (660) is arranged on the outer circumferential side of the through hole (620) and is used for positioning the third segment (223).

9. The high-voltage junction box according to claim 8, characterized in that The second positioning part (660) comprises: two first positioning pieces (661) arranged oppositely on two sides of the third segment (223) and connected with the plate body (630); a second positioning piece (662) arranged on one side of the third segment (223) away from the through hole (620) and connected with the plate body (630); and the second positioning piece (662), the two first positioning pieces (661) and the plate body (630) form a positioning space.

10. The high-voltage junction box according to claim 1, characterized in that The safety protrusion (420) is integrally connected with the main body (410).

11. The high-voltage junction box according to claim 1, characterized in that The shell (100) is provided with a plurality of positioning columns (130) on one side facing the maintenance cover plate (400); the maintenance cover plate (400) has a plurality of positioning holes (440); and the plurality of positioning columns (130) are inserted one by one into the plurality of positioning holes (440), and one positioning hole (440) penetrates the safety protrusion (420).

12. An automobile characterized by comprising: The high-voltage terminal box comprises the high-voltage terminal box according to any one of claims 1-11.

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