Double-core high-voltage junction box

Abstract

The utility model relates to a double-core high-voltage junction box, and relates to the technical field of junction boxes, the double-core high-voltage junction box comprises a bottom cover, a sleeve and a top cover, the bottom cover is provided with two accommodating grooves arranged in parallel, one end of the bottom cover is provided with a connecting pipe extending in the direction away from the accommodating grooves, and the connecting pipe is communicated with the accommodating grooves; the sleeve penetrates through the lower part of the bottom cover and extends into the accommodating groove; the top cover and the bottom cover are fixed so as to seal the accommodating groove; when the double-core high-voltage junction box is used, the double-core high-voltage junction box further comprises a cable and a connecting piece, the connecting piece is arranged at the end, close to the bottom cover, of the cable, and the cable drives the connecting piece to stretch into the connecting pipe so that the connecting piece can stretch into the containing groove to be communicated with the sleeve. The single-core junction box can solve the problems that a cable connected with an existing single-core junction box in a high-voltage environment is thick, consequently, the current-carrying capacity is large, the single-core junction box is damaged easily, and the cable is difficult to install flexibly.

Description

Technical Field

[0001] The present application relates to the technical field of junction boxes, and in particular to a dual-core high-voltage junction box. Background Art

[0002] With the rapid development of new energy vehicles, power transmission, industrial automation and other fields, the market demand for high-voltage junction boxes continues to grow, and customers' requirements for the performance, safety, reliability and other aspects of high-voltage junction boxes are also constantly increasing.

[0003] Existing charging facilities generally use a single-core high-voltage junction box as the power input port. Although this design is simple and easy to implement, it cannot withstand the long-term high-voltage current when facing the demand for high-voltage fast charging, and it is easy to cause local overheating or even melting. If thicker cables are used for connection, the wiring will be inflexible and inconvenient to install. Utility Model Content

[0004] The present application provides a dual-core high-voltage junction box to solve the problem that the cables connected to the current single-core junction box are thicker in a high-voltage environment, resulting in a large current carrying capacity, easy damage, and difficulty in flexible installation.

[0005] A double-core high-voltage junction box, comprising:

[0006] A bottom cover, wherein the bottom cover is provided with two juxtaposed receiving grooves, and a side wall of the bottom cover is provided with a connecting pipe extending in a direction away from the receiving grooves, the connecting pipe being in communication with the receiving grooves;

[0007] a sleeve, passing through the bottom of the bottom cover and extending into the receiving groove;

[0008] a top cover, fixed to the bottom cover to seal the receiving groove;

[0009] When the dual-core high-voltage junction box is in use, it also includes a cable and a connector. The connector is arranged at one end of the cable close to the bottom cover. The cable drives the connector to extend into the connecting tube, so that the connector extends into the accommodating groove and is connected to the sleeve.

[0010] By adopting the above technical solution, when the junction box is used for charging, the two cables are respectively extended into the connecting tube, and the connector at the front end of the cable can be extended into the accommodating groove and connected with the sleeve, and the sleeve is plugged into the cable of the battery pack to charge the battery pack. This dual-core structure reduces the current carrying capacity of a single cable and is not easily damaged, which effectively improves the service life of the cable and the reliability of the junction box in a high-voltage environment.

[0011] In one embodiment, the connecting part includes a copper nose and a bolt, the copper nose is provided with a copper sheet and a copper ring, the sleeve is connected to the copper sheet, the copper ring is sleeved with the cable, and the bolt passes through the copper sheet and the sleeve to achieve conduction.

[0012] By adopting the above technical solution, the copper sheet and copper ring structure of the copper nose are adapted to the sleeve and cable respectively. The copper sheet and sleeve are passed through the bolts to ensure the stability of the connection and good conductivity, reduce the resistance at the connection, and reduce the energy loss and heat risk during high-voltage current transmission.

[0013] In one embodiment, a first through hole is passed through the lower end of the bottom cover, and the dual-core high-voltage junction box also includes a lower shell, which is arranged in the accommodating groove and partially extends from the first through hole to form an insulating tube, the sleeve is passed through the insulating tube, the copper sheet is in contact with the upper end of the insulating tube and the sleeve, and the copper sheet is provided with a first positioning hole, and the bolt is passed through the first positioning hole, the first through hole and the insulating tube to fix the copper nose, the lower shell and the sleeve.

[0014] By adopting the above technical solution, not only is the tight connection between the various components ensured, preventing the components from loosening due to factors such as vibration during use, but the insertion of the bolts also realizes a reliable electrical connection between the copper nose and the sleeve, thereby improving the electrical performance and mechanical stability of the entire junction box.

[0015] In one embodiment, the connecting tube includes a shielding ring, which is arranged at an end of the copper ring away from the receiving groove. The shielding ring is provided with an inwardly retracted spring sheet, which abuts against the outer surface of the cable.

[0016] By adopting the above technical solution, when the cable is subjected to vibration, the spring piece abuts against the outer surface of the cable, and the reaction force of the spring piece can play a role in buffering and vibration reduction, effectively protecting the connection part between the cable and the connector, avoiding loosening or damage of the connection due to long-term vibration, thereby ensuring the stability of current conduction.

[0017] In one embodiment, the connecting tube further includes a rubber layer, and the rubber layer is located between the shielding ring and the cable.

[0018] By adopting the above technical solution, the rubber layer can reduce the impact force on the cable; at the same time, it can also protect the outer surface of the cable, prevent it from being scratched or damaged by shrapnel, maintain the insulation performance of the cable, and improve the protection ability of the junction box for the cable.

[0019] In one embodiment, the dual-core high-voltage junction box further includes a locking member, which is disposed on a side of the connecting tube away from the bottom cover and is fixed to the connecting tube, and an end of the locking member away from the connecting tube is tightly fitted with the cable.

[0020] By adopting the above technical solution, a locking piece is arranged on the side of the connecting pipe away from the bottom cover and is fixed to the connecting pipe, which fits tightly with the cable. This can effectively prevent water from entering the interior of the junction box, thereby ensuring the safety and stability of the electrical connection inside the junction box and avoiding electrical faults such as short circuits caused by moisture ingress.

[0021] In one embodiment, the locking member includes an abutment tube and an elastic member, the abutment tube is sleeved with the connecting tube and the elastic member, the elastic member abuts against an end of the connecting tube away from the bottom cover, and the elastic member is sleeved with the cable.

[0022] By adopting the above technical solution, this structure enables the elastic member to fit tightly with the cable, and can adapt to cables of different sizes. At the same time, the abutment tube presses the elastic member, so that cables of various specifications can achieve good sealing and fixing effects.

[0023] In one embodiment, the elastic member includes a sealing ring and a wire clamp, the sealing ring abuts against an end of the connecting tube away from the bottom cover, and the wire clamp abuts against an end of the sealing ring away from the connecting tube.

[0024] By adopting the above technical solution, the sealing ring and the wire clamp are elastic and fit tightly with the outer surface of the cable, which not only fixes the cable and prevents the cable from shifting when subjected to vibration or external force, but also further enhances the fixing and protection effect of the junction box on the cable, ensuring the reliability of the electrical connection.

[0025] In one embodiment, the dual-core high-voltage junction box further includes an upper shell, which cooperates with the lower shell to seal the accommodating groove, and the upper shell and the lower shell are arranged between the bottom cover and the top cover.

[0026] By adopting the above technical solution, mutual interference caused by different electrodes in the two receiving grooves is prevented, thereby improving the electrical safety of the junction box; at the same time, the cooperation between the upper and lower shells also enhances the sealing of the receiving grooves, further protecting the internal electrical components from the influence of the external environment.

[0027] In one embodiment, the bottom cover and the top cover are detachably fixed.

[0028] By adopting the above technical solution, the bottom cover and the top cover can be detachably fixed, so that when the top cover has positive and negative pole markings, it is convenient to replace the top cover with a different marking for easy distinction.

[0029] In summary, this application has at least one beneficial effect:

[0030] 1. When the junction box is used for charging, the two cables are respectively extended into the connecting tube, and the connector at the front end of the cable can be extended into the receiving groove and connected with the sleeve. The sleeve is plugged into the cable of the battery pack for charging. This dual-core structure reduces the current carrying capacity of a single cable and is not easily damaged, effectively improving the service life of the cable and the reliability of the junction box in high-voltage environments.

[0031] 2. The copper sheet and copper ring structures of the copper nose are adapted to the sleeve and cable respectively. The copper sheet and sleeve are penetrated by bolts, which ensures the stability and good conductivity of the connection, reduces the resistance at the connection, and reduces the energy loss and heat risk during high-voltage current transmission.

[0032] 3. When the cable is vibrated, the shrapnel contacts the outer surface of the cable, and the reaction force of the shrapnel can play a role in buffering and reducing vibration, effectively protecting the connection part between the cable and the connector, avoiding loosening or damage of the connection due to long-term vibration, thereby ensuring the stability of current conduction; the rubber layer can absorb more vibration energy and reduce the impact force on the cable. At the same time, it can also protect the outer surface of the cable to prevent it from being scratched or damaged by the shrapnel, maintain the insulation performance of the cable, and improve the protection ability of the junction box to the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of a dual-core high-voltage junction box provided in an embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of a bottom cover provided in an embodiment of the present application;

[0035] Figure 3 This is a schematic cross-sectional view of a dual-core high-voltage junction box provided in an embodiment of the present application;

[0036] Figure 4 This is a schematic structural diagram of a lower shell, a connector, and a sleeve provided in an embodiment of the present application;

[0037] Figure 5 This is a schematic structural diagram of a shielding ring and an elastic member provided in an embodiment of the present application;

[0038] Figure 6 This is a schematic structural diagram of a locking member provided in an embodiment of the present application.

[0039] Explanation of the accompanying drawings: 1. Double-core high-voltage junction box; 11. Bottom cover; 111. Receiving groove; 112. Connecting pipe; 113. First through hole; 12. Connecting piece; 121. Copper nose; 122. Copper sheet; 123. Copper ring; 124. Bolt; 125. First positioning hole; 13. Sleeve; 14. Top cover; 15. Lower shell; 151. Insulating tube; 16. Upper shell; 17. Shielding ring; 171. Spring clip; 18. Locking piece; 181. Abutment tube; 182. Elastic piece; 183. Sealing ring; 184. Wire clamp. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-6 The double-core high-voltage junction box provided in this application is further described in detail.

[0041] Example 1

[0042] See also Figure 1-6 The double-core high-voltage junction box 1 provided in the embodiment of the present application includes a bottom cover 11, a connector 12, a sleeve 13 and a top cover 14.

[0043] The bottom cover 11 includes two accommodating grooves 111 arranged side by side. A connecting pipe 112 extending away from the accommodating grooves 111 is provided at one end of the bottom cover 11 . The connecting pipe 112 is communicated with the accommodating grooves 111 . Specifically, the bottom cover 11 is tilted, with one side wall higher and the other side wall lower. The bottom cover 11 is recessed inward to form two accommodating grooves 111, and the higher wall of the bottom cover 11 is provided with two connecting tubes 112 facing outward. The connecting tubes 112 are connected to the accommodating grooves 111 and correspond one to one. The shape of the connecting tubes 112 can be circular or square. The bottom cover 11 and the connecting tubes 112 can both be made of insulating materials, and the cable can be passed through the connecting tubes 112. Therefore, parameters such as the length, diameter and smoothness of the inner wall of the connecting tube 112 have been optimized. Sufficient length can provide certain protection and guidance for the cable, preventing the cable from being damaged due to excessive bending or external force during the connection process; the appropriate diameter ensures that cables of different specifications can be easily inserted, and at the same time, the smooth treatment of the inner wall can reduce the friction resistance when the cable is inserted, reducing the risk of damage to the cable sheath.

[0044] The sleeve 13 is inserted from the bottom of the bottom cover 11 into the receiving groove 111 and is connected to the connector 12; when the dual-core high-voltage junction box 1 is in use, it also includes a cable and a connector 12. The connector 12 is arranged at one end of the cable close to the bottom cover 11. The cable drives the connector 12 to extend into the connecting tube 112, so that the connector 12 extends into the receiving groove 111 and is connected to the sleeve 13.

[0045] Specifically, the lower wall surface of the bottom cover 11 is penetrated with a first through hole 113, and the double-core high-voltage junction box 1 further includes a lower shell 15, which is arranged in the receiving groove 111 and partially extends from the first through hole 113 to form an insulating tube 151, and the sleeve 13 is penetrated upward with the insulating tube 151, and the connecting piece 12 may include a copper nose 121 and a bolt 124, and the copper nose 121 includes a copper sheet 122 and a copper ring 123, and the copper sheet 122 can extend into the receiving groove 111 and connect with the lower shell 15 and The sleeve 13 is in contact, the copper sheet 122 is penetrated by a first positioning hole 125, the copper ring 123 is sleeved on the inner layer of the cable, the bolt 124 is penetrated by the first positioning hole 125, the first through hole 113 and the insulating tube 151 to fix the copper nose 121, the lower shell 15 and the sleeve 13 on the bottom cover 11, and the end of the sleeve 13 away from the bottom cover 11 is also connected to the battery pack of the car through the copper nose 121 and the bolt 124, so as to realize the charging of the car battery pack or use it as a power source.

[0046] The dual-core high-voltage junction box 1 also includes an upper shell 16 and a top cover 14. The upper shell 16 and the lower shell 15 cooperate to seal the receiving groove 111. The top cover 14 and the bottom cover 11 cooperate to seal the upper shell 16 and the lower shell 15. The good sealing performance effectively prevents impurities such as moisture and dust from entering the interior of the junction box. The bottom cover 11 and the top cover 14 are removable and fixed, facilitating the replacement of different top covers 14. In this embodiment, the bottom cover 11 and the top cover 14 are fixed together by multiple rivets. The top cover 14 can be marked with positive and negative poles for easy identification. The appropriate top cover 14 and bottom cover 11 can be selected for removable and fixed installation according to actual conditions.

[0047] A shielding ring 17 is provided within the connecting tube 112. The shielding ring 17 is located on the side of the copper ring 123 away from the receiving groove 111 and is fixed to the inner wall of the connecting tube 112. The shielding ring 17 is provided with an inwardly retracted spring 171. The spring 171 can abut against the outer surface of the cable, so that the spring 171 is subjected to an outward force. A rubber layer is also provided within the connecting tube 112, and the rubber layer is provided between the shielding ring 17 and the cable. Specifically, the shielding ring 17 can be made of a metal material with good electrical conductivity, which can effectively shield external electromagnetic interference, prevent external electromagnetic fields from affecting the electrical signals transmitted by the cable, and ensure the accuracy and stability of the signal. When the junction box is vibrated or the cable is slightly shaken by external force, the spring 171 will produce corresponding elastic deformation, absorbing and buffering the vibration energy, thereby protecting the connection between the cable and the connector 12 from damage caused by excessive vibration. The rubber layer can better disperse and absorb the remaining vibration impact force, so that the cable is in a relatively stable environment in the connecting tube 112; at the same time, the rubber layer can also protect the outer surface of the cable, preventing the shrapnel 171 from scratching or wearing the cable sheath during long-term contact, maintaining the insulation integrity of the cable, and ensuring the safety of power transmission.

[0048] The dual-core high-voltage junction box 1 may further include a shielding sleeve, which is arranged at one end of the shielding ring 17 close to the accommodating groove 111 and extends into the accommodating groove 111. The shielding sleeve is sleeved with the copper ring 123 and the inner layer of the cable. The shielding sleeve is made of plastic, ceramic or composite material with good insulation performance. This insulation design can withstand the electric field strength under high-voltage environment, avoid short-circuit accidents caused by insulation failure, and ensure the safe operation of the electrical system.

[0049] The dual-core high-voltage junction box 1 may further include a locking member 18. The locking member 18 is disposed on a side of the connecting tube 112 away from the bottom cover 11 and is secured to the connecting tube 112. The end of the locking member 18 away from the connecting tube 112 is tightly fitted with the cable. The locking member 18 includes an abutment tube 181 and an elastic member 182. The abutment tube 181 is sleeved around the connecting tube 112 and the elastic member 182. The elastic member 182 abuts against the end of the connecting tube 112 away from the bottom cover 11, and the elastic member 182 is sleeved around the cable.

[0050] Specifically, the inner wall surface of the end of the abutment tube 181 near the connecting tube 112 is internally threaded, and the outer wall surface of the connecting tube 112 near the abutment tube 181 is externally threaded. By rotating, the abutment tube 181 is sleeved onto the connecting tube 112. The elastic member 182 may include a sealing ring 183 and a wire clamp 184. The sealing ring 183 tightly abuts the end of the connecting tube 112 away from the bottom cover 11, and the wire clamp 184 abuts the end of the sealing ring 183 away from the connecting tube 112. The inner wall surface of the abutment tube 181 away from the connecting tube 112 compresses the wire clamp 184, which in turn compresses the sealing ring 183, forming an effective seal between the abutment tube 181 and the cable, preventing liquids, dust, and other impurities from entering the junction box through the gap between the cable and the abutment tube 181. The material selection and sealing structure design of the sealing ring 183 have been rigorously tested to ensure excellent sealing performance under various harsh environmental conditions. The wire clamp 184 tightly cooperates with the sealing ring 183 to further secure the cable. The design of the wire clamp 184 and the sealing ring 183 takes into account the compatibility of different cable sizes. They can clamp the cable through appropriate adjustment or their own elastic deformation to prevent the cable from being displaced or shaken due to external forces during use, thereby ensuring the stability and reliability of the cable connection.

[0051] The implementation principle of this embodiment is as follows: When the dual-core high-voltage junction box 1 is used for charging, two cables are respectively inserted into the connecting tube 112 and fixedly sealed to the connecting tube 112 by the abutment tube 181, sealing ring 183, and wire clamp 184. The copper sheet 122 at the front end of the cable extends into the receiving groove 111 and is fixed and connected to the sleeve 13 by bolt 124. The end of the sleeve 13 away from the bottom cover 11 is then connected to the cable of the battery pack through the copper nose 121 and bolt 124. The current passes through this circuit and finally charges the battery pack. This dual-core structure reduces the current carrying capacity of a single cable and is not easily damaged, effectively improving the service life of the cable and the reliability of the junction box in high-voltage environments. At the same time, it can ensure reliable connection between different cables and ensure smooth current transmission.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A dual-core high-voltage junction box, characterized in that: include: A bottom cover (11), the bottom cover (11) being provided with two accommodating grooves (111) arranged in parallel, a side wall of the bottom cover (11) being provided with a connecting pipe (112) extending in a direction away from the accommodating grooves (111), the connecting pipe (112) being communicated with the accommodating grooves (111); A sleeve (13) is arranged below the bottom cover (11) and extends into the receiving groove (111); a top cover (14) fixed to the bottom cover (11) to seal the receiving groove (111); When the dual-core high-voltage junction box (1) is in use, it also includes a cable and a connector (12). The connector (12) is arranged at one end of the cable close to the bottom cover (11). The cable drives the connector (12) to extend into the connecting tube (112), so that the connector (12) extends into the receiving groove (111) and is connected to the sleeve (13).

2. A double-core high-voltage junction box according to claim 1, characterized in that: The connecting piece (12) comprises a copper nose (121) and a bolt (124); the copper nose (121) is provided with a copper sheet (122) and a copper ring (123); the sleeve (13) is connected to the copper sheet (122); the copper ring (123) is sleeved with the cable; and the bolt (124) penetrates the copper sheet (122) and the sleeve (13) to achieve conduction.

3. A double-core high-voltage junction box according to claim 2, characterized in that: The lower wall surface of the bottom cover (11) is provided with a first through hole (113). The double-core high-voltage junction box (1) further comprises a lower shell (15). The lower shell (15) is provided in the accommodating groove (111) and partially extends from the first through hole (113) to form an insulating tube (151). The sleeve (13) is provided with the insulating tube (151) and the first through hole (113). The copper sheet (122) abuts against the upper end of the insulating tube (151) and the sleeve (13). The copper sheet (122) is provided with a first positioning hole (125). When the cable is inserted into the connecting tube (112), the bolt (124) is provided through the first positioning hole (125), the first through hole (113) and the insulating tube (151) to fix the copper nose (121), the lower shell (15) and the sleeve (13).

4. A double-core high-voltage junction box according to claim 3, characterized in that: The connecting tube (112) includes a shielding ring (17), which is arranged at one end of the copper ring (123) away from the receiving groove (111). The shielding ring (17) is provided with an inwardly retracted spring piece (171), and the spring piece (171) abuts against the outer surface of the cable.

5. A double-core high-voltage junction box according to claim 4, characterized in that: The connecting tube (112) further includes a rubber layer, and the rubber layer is arranged between the shielding ring (17) and the cable.

6. A double-core high-voltage junction box according to claim 5, characterized in that: The dual-core high-voltage junction box (1) further comprises a locking member (18), wherein the locking member (18) is arranged on a side of the connecting tube (112) away from the bottom cover (11) and is fixed to the connecting tube (112), and an end of the locking member (18) away from the connecting tube (112) is tightly fitted with the cable.

7. A double-core high-voltage junction box according to claim 6, characterized in that: The locking member (18) comprises an abutting tube (181) and an elastic member (182); the abutting tube (181) is sleeved with the connecting tube (112) and the elastic member (182); the elastic member (182) abuts against an end of the connecting tube (112) away from the bottom cover (11); and the elastic member (182) is sleeved with the cable.

8. A double-core high-voltage junction box according to claim 7, characterized in that: The elastic member (182) comprises a sealing ring (183) and a wire clamp (184); the sealing ring (183) abuts against one end of the connecting tube (112) away from the bottom cover (11); and the wire clamp (184) abuts against one end of the sealing ring (183) away from the connecting tube (112).

9. The double-core high-voltage junction box according to claim 3, characterized in that: The double-core high-voltage junction box (1) further comprises an upper shell (16), wherein the upper shell (16) cooperates with the lower shell (15) to seal the receiving groove (111), and the upper shell (16) and the lower shell (15) are arranged between the bottom cover (11) and the top cover (14).

10. The double-core high-voltage junction box according to claim 1, characterized in that: The bottom cover (11) and the top cover (14) are detachably fixed.

Images