Multi-interface high-voltage box

Abstract

The application discloses a kind of multi-interface high-voltage box, it is related to energy storage system technical field;Specifically including the high-voltage box main body formed by high-voltage box body and high-voltage box cover, the inside of high-voltage box main body is laid through electric connection and is connected with relay, fuse and main control module, and the outer wall of high-voltage box body is fixedly installed with multiple connection sockets, and the connection socket is connected with relay, fuse through copper bar, the main body of the connection socket is set as the socket main body with socket terminal installed on back, and the bottom of the socket main body is provided with plug fixing shell.The limiting section and the clamping strip slot of the plug are set, the limiting clamping strip is provided on the socket, and the insertion gap is reduced;By fixed threaded pin is screwed into socket body blind hole type fixed pin hole, mechanical locking is realized, axial relative displacement is prevented;Ensure that the wire core connection terminal and socket terminal are in continuous close contact, avoid loosening or contact resistance increase due to vibration in long-term operation.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and in particular to a multi-interface high-voltage box. Background Technology

[0002] The high-voltage box of a containerized energy storage system is usually located in the electrical control area of ​​the container, connecting the energy storage battery compartment with the external circuit. It is an integrated device that integrates high-voltage DC relays, monitoring and control modules, and safety protection components, and is responsible for the scheduling, on / off control and safety protection of high-voltage DC power in the containerized energy storage system.

[0003] A search revealed Chinese patent application number 202322726595.6, which discloses a high-voltage box for an energy storage system. The box features a cavity for housing electrical components, with the electrode mechanism placed within the cavity. The electrical components include a positive circuit assembly and a negative circuit assembly, each comprising multiple copper busbars and a control assembly. The control assembly electrically connects the multiple copper busbars, allowing them to be arranged according to the designer's specified wiring. This reduces the number of bends in the positive and negative circuit assemblies, facilitating control of the gaps between the copper busbars. The control assembly also includes multiple fuses, multiple shunts, and multiple relays.

[0004] The aforementioned high-voltage boxes, as well as other existing types of high-voltage boxes, have connectors that do not meet the corresponding IP protection levels when connecting the battery clusters and the power grid. Moisture and dust intrusion can cause leakage and short circuits, posing an even greater risk in energy storage applications with high humidity and dust. Furthermore, corrosion and loosening of the connectors after long-term operation, if not promptly detected and replaced, also pose significant safety hazards. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-port high-voltage box.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-interface high-voltage box includes a high-voltage box body composed of a high-voltage box body and a high-voltage box cover. The interior of the high-voltage box body houses relays, fuses, and a main control module electrically connected. Multiple connection sockets are fixedly installed on the outer wall of the high-voltage box body. These connection sockets are connected to the relays and fuses via copper busbars. Each connection socket has a socket body with socket terminals mounted on its back. A plug fixing shell is located at the bottom of the socket body. A connector is fixedly connected to the bottom of the plug fixing shell. A connecting sleeve is fixedly connected to the bottom of the connector. A wire core connection terminal is inserted into the inside of the connecting sleeve. A connecting plug, composed of a plug-in sleeve and a cable fixing sleeve, is fixedly sleeved on the outside of the wire core connection terminal. The connecting plug is sleeved on the outside of the bottom of the connection socket. A mating connector is located on the top of the outer wall of the plug-in sleeve. The mating connector is fixedly connected to the connector, ensuring that the connecting plug is stably sleeved on the bottom of the connection socket and sealing the connecting sleeve. The mating connector is divided into connector two and connector three. The main body of connector three is configured as a fixing ring that can be fixedly snapped onto the outer wall of connector one.

[0007] As a preferred embodiment of the present invention: the outer wall of the first connector is threaded, the second connector is configured as an internally threaded sleeve, screwed onto the outer wall of the first connector, and the second connector is rotatably sleeved onto the outer wall of the insert sleeve.

[0008] Based on the aforementioned scheme: the thread on the outer wall of the connector is replaced with a limiting ring groove, the fixing ring is set as a semi-circular shape, and the two fixing rings are symmetrically arranged to form a hoop that is snapped into the inside of the limiting ring groove.

[0009] Based on the aforementioned scheme: the inner wall of the fixed ring is provided with multiple pin fitting grooves, one end of the inner wall of the pin fitting groove is integrally formed with a slot protrusion, and a fixed pin is provided inside the pin fitting groove. The outer wall of the fixed pin is provided with a pin slot that matches the slot protrusion. Multiple fixed pins are fixedly connected to the top of the outer wall of the insertion sleeve.

[0010] As a preferred embodiment of the present invention: the outer wall of the connecting sleeve is provided with a plurality of limiting strips at equal intervals, and the middle part between two adjacent limiting strips is provided with a fixing pin hole opened on the outer wall of the connecting sleeve.

[0011] As a preferred embodiment of the present invention: the plug-in sleeve is divided into a limiting section with the same outer diameter, a thick-walled section and an arc plate section from top to bottom. The inner diameter of the limiting section is the same as the outer diameter of the connecting sleeve; the inner diameter of the thick-walled section is smaller than that of the limiting section and is the same as the diameter of the wire core connecting terminal; the arc plate section is set as a semi-cylindrical shape, and its inner diameter is larger than that of the thick-walled section and smaller than that of the limiting section.

[0012] Based on the aforementioned scheme: the length of the limiting section is the same as that of the connecting sleeve, and multiple slots for the limiting strip are equally spaced on the inner wall. Two fixed threaded pins are symmetrically arranged on the outer wall of the limiting section, and the fixed threaded pins penetrate the cylinder of the limiting section. When the connecting sleeve is fully inserted into the limiting section, one end of the fixed threaded pin can be inserted into the fixed pin hole, so that the connecting sleeve and the insertion sleeve will not have axial relative displacement.

[0013] As a preferred embodiment of the present invention: the cable fixing sleeve is divided into a positioning section, a partially thickened section and a protective section with the same outer diameter from top to bottom. The inner diameter of the positioning section is the same as the outer diameter of the plug sleeve, and two connecting holes are symmetrically opened on the outer wall of the positioning section to penetrate the thick-walled section of the plug sleeve.

[0014] Based on the aforementioned scheme: the inner diameter of the main body of the locally thickened section is the same as that of the positioning section, and the inner wall of the locally thickened section is integrally formed with a half-cylinder plate of the same size as the arc plate section of the insertion sleeve. The half-cylinder plate and the arc plate section form a cylinder. A fixing rubber ring is fixedly installed on the inner wall of the cylinder, and the outer wall of the locally thickened section is provided with two connecting insertion holes that penetrate the upper and lower parts of both sides of the arc plate section of the insertion sleeve.

[0015] Based on the aforementioned scheme: the protective section is set in a ring shape, with an inner diameter smaller than the positioning section and larger than the arc plate section of the insertion sleeve, and a protective rubber sleeve is fixedly installed at the bottom end of the protective section, which is sleeved on the outside of the wire core connection terminal.

[0016] The beneficial effects of this invention are as follows: 1. This multi-port high-voltage box reduces the insertion gap by using a limiting section and a locking strip groove on the plug and a limiting strip on the socket; mechanical locking is achieved by screwing a fixed threaded pin into the blind hole type fixing pin hole of the socket body to prevent axial relative displacement; ensuring that the wire core connection terminal and the socket terminal are in continuous tight contact, avoiding loosening or increased contact resistance due to vibration during long-term operation.

[0017] 2. This multi-port high-voltage box, through the installation ring groove and insulating sealing gasket set at the bottom of the connecting sleeve, the plug is pressed against the top of the thick-walled section after insertion, forming the first seal; the second connector in the form of an internal threaded cylinder is screwed into the first connector on the outer wall of the socket, and after tightening, it presses the limiting ring, so that the plug and socket mating surfaces are axially pressed; the double sealing structure effectively prevents moisture, salt spray and dust from entering.

[0018] 3. This multi-port high-voltage box uses a tenon-and-mortise interlocking structure formed by a fixed clamping ring (hoop ring), a limiting ring groove, a fixed pin, and a pin slot; multiple fixed pins are fixedly connected to the plug housing, and the clamping ring simultaneously restricts the circumferential and axial displacement of the socket and plug; even under long-term high-frequency micro-vibration caused by transportation or equipment such as fans, the connectors remain secure and the seals are not damaged.

[0019] 4. This multi-port high-voltage box uses a semi-circular plate section and a fixing rubber ring at the lower part of the plug-in sleeve to clamp the insulation layer; a protective rubber sleeve is set at the bottom to allow the cable to bend naturally and be supported, preventing the root from breaking or the insulation layer from cracking; the protective rubber sleeve is locked with fixing screws, which facilitates disassembly and maintenance; it extends the service life of the cable and reduces hidden faults caused by damage to the wire core.

[0020] 5. This multi-interface high-voltage box has eight external network interfaces on the front and positive and negative interfaces for battery clusters on the left and right sides respectively; it supports parallel access of multiple battery clusters and bidirectional charging and discharging circuits, which meets the actual engineering needs of containerized energy storage systems; compared with traditional mixed wiring, it reduces the risk of misconnection and facilitates on-site construction and subsequent maintenance. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the overall assembly of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the overall assembly of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall assembly front of the present invention; Figure 4 This is a schematic diagram of the overall assembly of the present invention on the left side; Figure 5 This is a schematic diagram of the overall assembly of the present invention on the right side; Figure 6 This is a three-dimensional structural diagram showing the arrangement of the internal components of the present invention; Figure 7 This is a top view schematic diagram of the internal component layout of the present invention; Figure 8 This is a three-dimensional structural diagram of the connection socket of the present invention; Figure 9 A three-dimensional schematic diagram of the optimized connection socket structure of the present invention. Figure 1 ; Figure 10 For the present invention Figure 9 A partial sectional view of the central structure; Figure 11 For the present invention Figure 10 A magnified schematic diagram of the partial structure at point A in the middle; Figure 12 For the present invention Figure 10 A magnified view of the structure at point B in the middle; Figure 13 For the present invention Figure 10 A magnified schematic diagram of the structure at point C in the middle; Figure 14 For the present inventionFigure 10 A magnified schematic diagram of the local structure at point D; Figure 15 A three-dimensional schematic diagram of the optimized connection socket structure of the present invention. Figure 2 ; Figure 16 For the present invention Figure 15 A magnified schematic diagram of the structure at point E in the middle.

[0022] In the diagram: 1. High-voltage box body; 2. High-voltage box cover; 3. Connecting socket; 301. Socket body; 302. Socket terminal; 303. Socket connecting shell; 304. Plug fixing shell; 305. Connector one; 306. Connecting sleeve; 307. Insert sleeve; 308. Connector two; 309. Cable fixing sleeve; 310. Insulation layer; 311. Wire core connecting terminal; 312. Fixing pin hole; 313. Limiting strip; 314. Locking strip. 315. Groove; 316. Limiting retaining ring; 317. Fixing threaded pin; 318. Connecting insertion hole one; 319. Long arm screw one; 320. Connecting insertion hole two; 321. Long arm screw two; 322. Fixing rubber ring; 323. Protective rubber sleeve; 324. Fixing screw; 325. Limiting ring groove; 326. Fixing pin; 327. Pin retaining groove; 328. Pin retaining groove; 329. Groove protrusion; 330. Insulating sealing washer. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] Example 1: A multi-interface high-voltage box, used inside a containerized energy storage system, connects the energy storage battery cluster and the external power grid to control the storage and release of electrical energy, such as... Figures 1 to 14 As shown, the high-voltage box body consists of a high-voltage box housing 1 and a high-voltage box cover 2. The interior of the high-voltage box body is equipped with relays, fuses and a main control module that are electrically connected.

[0026] Reference Figures 6 to 7 A support base plate is fixedly installed on the inner wall of the bottom of the high-voltage box 1. Relays and fuses are installed on the support base plate, and the main control module is fixedly installed on the inner wall of the back of the high-voltage box 1.

[0027] Multiple connection sockets 3 are fixedly installed on the outer wall of the high-voltage box 1. The connection sockets 3 are connected to relays and fuses via copper busbars; see reference. Figures 3 to 5 The front of the high-voltage box 1 is equipped with eight connection sockets 3 for connecting to the external power grid, which are in the following order: charging negative one, charging negative two, discharging negative one, discharging negative two, charging positive one, charging positive two, discharging positive one and discharging positive two; the left side of the high-voltage box 1 is equipped with battery negative one and battery negative two for connecting to the battery cluster, and the right side is equipped with battery positive one and battery positive two for connecting to the battery cluster.

[0028] The layout and location of components such as fuses, relays, main control modules, and connection sockets can be found in [reference needed]. Figures 1 to 7 Those skilled in the art can fully understand the structure of the high-voltage box and the connection method between its components based on the above-described drawings and existing technology, and this application will not elaborate further.

[0029] Reference Figure 8 The main body of the existing connection socket 3 is configured as a socket body 301. A socket terminal 302 (connected to a copper busbar) is installed on the back of the socket body 301 and inserted into the high voltage box 1. A socket connection shell 303 is integrally formed at the bottom of the socket body 301. A plug fixing shell 304 is fixedly connected to the bottom of the socket connection shell 303. A connection plug (existing technology) is installed in the internal thread of the plug fixing shell 304.

[0030] Based on the prior art, this application optimizes the socket body 301 and the connecting plug to improve the connection stability and sealing when the two are in contact, and to prevent moisture and dust from entering.

[0031] The bottom end of the plug fixing shell 304 is fixedly connected to the connector 305, and the bottom end of the connector 305 is fixedly connected to the connecting sleeve 306. Six limiting strips 313 are equidistantly arranged on the outer wall of the connecting sleeve 306. The middle of the space between two adjacent limiting strips 313 is provided with a fixing pin hole 312 opened on the outer wall of the connecting sleeve 306. The fixing pin hole 312 is set as a blind hole and does not penetrate the cylinder of the connecting sleeve 306. The bottom end of the connecting sleeve 306 is provided with an installation ring groove, and an insulating sealing gasket 330 is fixedly installed inside the installation ring groove.

[0032] The connector is composed of a plug sleeve 307 and a cable fixing sleeve 309. A wire core connection terminal 311 is fixedly installed inside the connector. An insulating layer 310 is fixedly sleeved on the outer wall of the wire core connection terminal 311. The insulating layer 310 is clamped and fixed by the plug sleeve 307 and the cable fixing sleeve 309.

[0033] The insertion sleeve 307 is divided into a limiting section with the same outer diameter, a thick-walled section, and an arc plate section from top to bottom. The inner diameter of the limiting section is the same as the outer diameter of the connecting sleeve 306 and is fitted onto the outside of the connecting sleeve 306. The wire core connecting terminal 311 is located inside the limiting section, with its top end slightly higher than the top end of the limiting section. The inner diameter of the thick-walled section is smaller than that of the limiting section and is the same as the diameter of the wire core connecting terminal 311. It is fixed inside the thick-walled section by thermosetting adhesive. The arc plate section is set as a semi-cylindrical shape. Its inner diameter is larger than that of the thick-walled section and smaller than that of the limiting section. The inner diameter of the arc plate section is slightly smaller than the outer diameter of the insulating layer 310. The top end of the insulating layer 310 abuts against the bottom end of the thick-walled section.

[0034] The length of the limiting section is the same as that of the connecting sleeve 306, and the inner wall is provided with six slots 314 that are adapted to the limiting strip 313. The outer wall of the limiting section is symmetrically provided with two fixing threaded pins 316. The fixing threaded pins 316 penetrate the cylinder of the limiting section, and the end of the fixing threaded pin 316 that enters the limiting section is set as a smooth outer wall with a chamfer. When the connecting sleeve 306 is fully inserted into the limiting section, the limiting strip 313 is engaged in the slot 314, and the insulating sealing gasket 330 is pressed on the top of the thick-walled section. The fixing threaded pin 316 is rotated clockwise and screwed into the limiting section. The smooth outer wall end of the fixing threaded pin 316 inside the limiting section can be inserted into the fixing pin hole 312, so that the connecting sleeve 306 and the insertion sleeve 307 are relatively fixed and there will be no axial relative displacement, which fully ensures the tight connection between the wire core connection terminal 311 and the internal conductive structure of the connection socket 3.

[0035] The cable fixing sleeve 309 is fitted onto the outer wall of the plug sleeve 307. From top to bottom, it is divided into a positioning section, a locally thickened section, and a protective section with the same outer diameter. The inner diameter of the positioning section is the same as the outer diameter of the plug sleeve 307, and its top end is in the same plane as the top end of the thick-walled section of the plug sleeve 307. Two connecting holes 317 are symmetrically opened on the outer wall of the positioning section, penetrating the two sides of the thick-walled section of the plug sleeve 307. A long-arm screw 318 is installed inside the connecting hole 317.

[0036] The main body of the locally thickened section has the same inner diameter as the positioning section, and the top inner wall of the locally thickened section is integrally formed with a semi-cylindrical plate of the same size as the arc plate section of the plug-in sleeve 307. The semi-cylindrical plate and the arc plate section form a cylinder. The inner wall of the cylinder is provided with a positioning ring groove. A fixing rubber ring 321 is fixedly installed inside the positioning ring groove. The fixing rubber ring 321 is sleeved on the outer wall of the insulating layer 310. The outer wall of the locally thickened section is provided with a second connecting insertion hole 319 that penetrates the upper and lower parts of both sides of the arc plate section of the plug-in sleeve 307. A second long-arm screw 320 is installed inside the second connecting insertion hole 319. The diameter of the second long-arm screw 320 is slightly smaller than that of the first long-arm screw 318.

[0037] The protective section is designed as an annular shape, with an inner diameter smaller than that of the positioning section and larger than that of the arc plate section of the insertion sleeve 307. A protective rubber sleeve 322 is fixedly installed at the bottom end of the protective section. Multiple fixing screws 323 are equidistantly installed on the back of the protective rubber sleeve 322. The ends of the fixing screws 323 are screwed into the bottom end of the protective section. The protective rubber sleeve 322 is fitted onto the outside of the insulating layer 310. The top end of the protective rubber sleeve 322 is integrally formed into an annular part, which is inserted into the interior of the protective section. Its outer diameter is the same as that of the inner diameter of the protective section and abuts against the bottom end of the cylinder (the cylinder formed by the half-cylinder plate and the arc plate section), which facilitates the bending of the wire core (the wire connected to the wire core terminal 311) inside the insulating layer 310 and avoids damage to the wire core.

[0038] In this embodiment, the connecting plug (the optimized structure of this application) is fixed to the end of the circuit connection wire between the battery pack and the external power grid according to the above description. Then, according to the connection requirements of the battery pack and the external power grid, the corresponding connecting plug and connecting socket 3 are determined. Next, the connecting plug is inserted into the connecting socket 3. Then, the two fixing threaded pins 316 are rotated clockwise in sequence until the end of the fixing threaded pin 316 is inserted into the fixing pin hole 312 until the fixing threaded pin 316 can no longer rotate. Then, the high-voltage box is connected to the control system of the containerized energy storage system, and the high-voltage box is tested. After the test is completed, the high-voltage box is fixed.

[0039] Example 2: A multi-port high-voltage box, in order to further improve the sealing performance of the connection socket 3; this example makes the following improvements based on Example 1.

[0040] The top of the outer wall of the limiting section of the insert sleeve 307 is integrally formed with a limiting ring 315, and the outer wall of the limiting section is fitted with a connecting part 308 that can be detached from below. The connecting part 308 is set as an internally threaded sleeve and is rotatably fitted on the outside of the limiting section.

[0041] The outer wall of connector 1 305 is threaded, connector 2 308 is screwed onto the outer wall of connector 1 305, and connector 2 308 is rotatably sleeved onto the outer wall of insert sleeve 307.

[0042] In this embodiment, after the connecting sleeve 306 and the insertion sleeve 307 are initially fixed as described in Embodiment 1, the connecting part 2 308 is rotated clockwise so that the connecting part 2 308 is screwed onto the outer wall of the connecting part 1 305. The force generated by the screwing of the connecting part 2 308 and the connecting part 1 305 is used to press the limiting ring 315, so that the limiting ring 315 is tightly pressed against the bottom end of the connecting part 1 305, which further improves the sealing performance of the connection between the connecting sleeve 306 and the insertion sleeve 307 and improves its ability to resist moisture and dust intrusion.

[0043] Example 3: A multi-port high-voltage box, such as Figures 15 to 16As shown, in order to further improve the installation stability of the connection socket 3, the following improvements are made to this embodiment based on embodiment two.

[0044] Connector 2 308 is replaced with connector 3. The main body of connector 3 is set as a fixing ring 327 that can be fixedly snapped onto the outer wall of connector 1 305. The fixing ring 327 is set as a semi-circular shape. The two fixing rings 327 are symmetrically arranged, and the two ends of the two fixing rings 327 are fixed by bolts to form a hoop. The thread on the outer wall of connector 1 305 is replaced with a limiting ring groove 324, and the hoop is snapped into the limiting ring groove 324.

[0045] The inner wall of the fixed retaining ring 327 is provided with multiple parallel pin fitting grooves 328. The end of the inner wall of the pin fitting groove 328 away from the axis of the retaining ring is integrally formed with a slot protrusion 329. The pin fitting groove 328 is provided with a fixed pin 325. The outer wall of the fixed pin 325 is provided with a pin slot 326 that matches the slot protrusion 329. Multiple fixed pins 325 are fixedly connected to the top of the outer wall of the insertion sleeve 307, and the fixed pins 325 are attached to the outer wall of the connector 305.

[0046] In this embodiment, after the connecting sleeve 306 and the plug sleeve 307 are initially fixed as described in Embodiment 1, multiple fixing pins 325 are attached to the outer wall of the connector 305. Then, two fixing rings 327 are correspondingly snapped onto both sides of the connector 305, so that the fixing pins 325 are snapped into the pin adapter groove 328. When the inner wall of the fixing ring 327 is attached to the side wall of the limiting ring groove 324, the slot protrusion 329 is snapped into the pin slot 326. Finally, the two fixing rings 327 are fixed by bolts. The above-mentioned tenon and mortise snapping method is used to further fix the connecting sleeve 306 and the plug sleeve 307, which can effectively improve the vibration resistance of the connection between the connector socket 3 and the connector plug. Even if the high-voltage box is in a high-vibration and high-humidity working environment for a long time, it can effectively improve the ability of the connection between the connector socket 3 and the connector plug to resist moisture and dust intrusion.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-interface high-voltage box, comprising a high-voltage box body (1) and a high-voltage box cover (2), wherein a relay, a fuse, and a main control module are electrically connected inside the high-voltage box body, and multiple connection sockets (3) are fixedly installed on the outer wall of the high-voltage box body (1), the connection sockets (3) being connected to the relays and fuses via copper busbars, characterized in that: The main body of the connection socket (3) is configured as a socket body (301) with a socket terminal (302) installed on the back. The bottom end of the socket body (301) is provided with a plug fixing shell (304). The bottom end of the plug fixing shell (304) is fixedly connected to a connector (305). The bottom end of the connector (305) is fixedly connected to a connecting sleeve (306). A wire core connecting terminal (311) is inserted into the inside of the connecting sleeve (306). A connecting plug composed of a plug sleeve (307) and a cable fixing sleeve (309) is fixedly sleeved on the outside of the wire core connecting terminal (311). The connecting plug is sleeved on the outside of the bottom end of the connection socket (3). A mating connector is provided on the top of the outer wall of the plug sleeve (307). The mating connector is fixedly connected to the connector (305) so that the connecting plug is stably sleeved on the bottom end of the connection socket (3) and the connecting sleeve (306) is sealed. The mating connector is divided into connector two (308) and connector three. The main body of connector three is configured as a fixing ring (327) that can be fixedly snapped onto the outer wall of connector one (305).

2. The multi-port high-voltage box according to claim 1, characterized in that: The outer wall of the first connector (305) is threaded, and the second connector (308) is configured as an internally threaded sleeve, which is screwed onto the outer wall of the first connector (305), and the second connector (308) is rotatably sleeved onto the outer wall of the insertion sleeve (307).

3. A multi-port high-voltage box according to claim 2, characterized in that: The thread on the outer wall of the connector (305) is replaced with a limiting ring groove (324), and the fixing ring (327) is set as a semi-circular shape. The two fixing rings (327) are symmetrically arranged to form a hoop that is snapped into the inside of the limiting ring groove (324).

4. A multi-port high-voltage box according to claim 3, characterized in that: The inner wall of the fixed retaining ring (327) is provided with multiple pin adapter grooves (328). One end of the inner wall of the pin adapter groove (328) is integrally formed with a slot protrusion (329). The pin adapter groove (328) is provided with a fixed pin (325). The outer wall of the fixed pin (325) is provided with a pin slot (326) that matches the slot protrusion (329). Multiple fixed pins (325) are fixedly connected to the top of the outer wall of the insertion sleeve (307).

5. A multi-port high-voltage box according to claim 1, characterized in that: The outer wall of the connecting sleeve (306) is provided with multiple limiting strips (313) at equal intervals, and the middle part between two adjacent limiting strips (313) is provided with a fixing pin hole (312) opened on the outer wall of the connecting sleeve (306).

6. A multi-port high-voltage box according to claim 1, characterized in that: The insertion sleeve (307) is divided into a limiting section with the same outer diameter, a thick-walled section and an arc plate section from top to bottom. The inner diameter of the limiting section is the same as the outer diameter of the connecting sleeve (306). The inner diameter of the thick-walled section is smaller than that of the limiting section and is the same as the diameter of the wire core connecting terminal (311). The arc plate section is set as a semi-cylindrical shape, and its inner diameter is larger than that of the thick-walled section and smaller than that of the limiting section.

7. A multi-port high-voltage box according to claim 6, characterized in that: The length of the limiting section is the same as that of the connecting sleeve (306), and the inner wall is provided with multiple slots (314) that are adapted to the limiting strip (313). The outer wall of the limiting section is symmetrically provided with two fixing threaded pins (316), which penetrate the cylinder of the limiting section. When the connecting sleeve (306) is fully inserted into the limiting section, one end of the fixing threaded pin (316) can be inserted into the fixing pin hole (312), so that the connecting sleeve (306) and the insertion sleeve (307) will not have axial relative displacement.

8. A multi-port high-voltage box according to claim 1, characterized in that: The cable fixing sleeve (309) is divided into a positioning section, a locally thickened section and a protective section with the same outer diameter from top to bottom. The inner diameter of the positioning section is the same as the outer diameter of the plug sleeve (307), and the outer wall of the positioning section is symmetrically provided with two connecting holes (317) that penetrate the thick wall section of the plug sleeve (307).

9. A multi-port high-voltage box according to claim 8, characterized in that: The inner diameter of the main body of the locally thickened section is the same as that of the positioning section, and the inner wall of the locally thickened section is integrally formed with a half-cylinder plate with the same size as the arc plate section of the insert sleeve (307). The half-cylinder plate and the arc plate section form a cylinder. A fixing rubber ring (321) is fixedly installed on the inner wall of the cylinder, and the outer wall of the locally thickened section is provided with two connecting insertion holes (319) that penetrate the upper and lower parts of both sides of the arc plate section of the insert sleeve (307).

10. A multi-port high-voltage box according to claim 8, characterized in that: The protective section is configured as an annular shape, with an inner diameter smaller than that of the positioning section and larger than that of the arc plate section of the insertion sleeve (307). A protective rubber sleeve (322) is fixedly installed at the bottom end of the protective section, and the protective rubber sleeve (322) is sleeved on the outside of the wire core connection terminal (311).

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