Compact battery box waterproof straight-out junction box

Abstract

The utility model discloses a compact waterproof straight-out junction box for a battery box. The waterproof junction box comprises a waterproof head wiring assembly and a row wiring seat. The waterproof head wiring assembly comprises a plug connecting sleeve and a plug terminal. The row wire holder comprises a socket shell, a socket terminal, a locking screw and a locking nut; the plug terminal and the socket terminal both adopt sheet-shaped structures; the plug terminal is provided with a first bending part; a second bending part is arranged on the socket terminal; and the first bending part and the second bending part are overlapped together and are fixed through a locking screw and a locking nut. According to the utility model, the sheet-shaped plug terminal and the sheet-shaped socket terminal are provided with the bending structures which are matched with each other, so that the screws and the nuts for locking can be installed in an inclined manner, vertical wire outgoing is maintained, the structure of the waterproof wire outgoing terminal of the battery box is more compact, the space utilization rate of a product is remarkably improved, and the production cost is reduced. And the device is especially suitable for occasions with limited battery pack installation space.

Description

Technical Field

[0001] This utility model belongs to the field of wiring equipment technology and relates to a compact, waterproof, direct-out junction box for battery boxes. Background Technology

[0002] In today's electrical equipment and new energy application fields, battery boxes are key components for energy storage, and the performance and design of their junction boxes are of paramount importance. With the continuous development of battery technology, especially its widespread application in electric vehicles and energy storage systems, the requirements for battery box junction boxes are becoming increasingly stringent.

[0003] There are two existing solutions for battery junction boxes: 1. Waterproof box housing method: This solution requires installing a larger housing after the terminals are screwed to the connector, using top and bottom screws for waterproofing. This design not only increases the number of components but also complicates the overall structure, making production and maintenance difficult. Installation and disassembly require multiple screw tightening operations, which are cumbersome and prone to waterproofing failure due to improper handling. Due to the complex structure and complicated procedures, the waterproofing effect is easily affected by installation quality, material aging, and other factors, posing a significant risk of failure. 2. Waterproof cover locking method: This solution uses a locking protective cover at the connector end after the terminals are screwed to the connector, achieving waterproofing by locking the cover in place. While eliminating the need for a housing housing, this requires a locking protective cover at the connector end and an additional locking mechanism. This design also increases the number and complexity of components.

[0004] It can be seen that traditional junction boxes typically have a loose structure and occupy a large amount of space. In some applications with stringent space requirements, such as small electric vehicles or compact energy storage devices, this can lead to difficulties in the overall system layout, increase the size and weight of the equipment, and hinder the miniaturization and lightweighting of products. Summary of the Invention

[0005] The purpose of this utility model is to provide a compact, waterproof, direct-out junction box for battery packs.

[0006] This utility model provides a compact waterproof direct-out junction box for a battery pack, which includes a waterproof connector assembly and a connector base. The waterproof connector assembly includes a plug connector sleeve and a plug terminal. The plug terminal is disposed in the plug connector sleeve and connects to a cable. The connector base includes a socket housing, a socket terminal, a locking screw, and a locking nut. The socket terminal is installed in the socket housing. Both the plug terminal and the socket terminal have a sheet-like structure. The plug terminal has a first bend. The socket terminal has a second bend. The first bend and the second bend overlap and are fixed by the locking screw and the locking nut.

[0007] Preferably, the angle formed by the central axis of the first bend and the connector base is equal to the angle formed by the central axis of the second bend and the waterproof head connector assembly, both being an angle of 15° to 50°; the central axis of the connector base coincides with that of the waterproof head connector assembly.

[0008] Preferably, the first and second bends are provided with corresponding connecting holes; the locking screw passes through the connecting holes on the first and second bends and is screwed and fixed with the locking nut.

[0009] Preferably, a nut limiting structure is integrally formed in the inner cavity of the socket housing; the nut limiting structure is aligned with the connecting hole on the second bent portion of the socket terminal; the limiting surface on the nut limiting structure matches the outer surface of the nut.

[0010] The nut limiting structure can provide circumferential limiting for the nut; at the same time, since the nut limiting structure is located on the side of the second bend that is inclined close to the inside of the socket terminal, the head of the locking screw is inclined towards the outside of the socket terminal to facilitate the installation and removal of the locking screw.

[0011] Preferably, the nut limiting structure is provided with a hexagonal groove for constraining the nut; a portion of the side of the hexagonal groove is provided with a protrusion structure.

[0012] Preferably, the waterproof connector assembly further includes a plug end cap and a end cap sealing ring; the end of the plug connector sleeve is threadedly connected to the plug end cap; the end cap sealing ring is disposed at the connection between the plug connector sleeve and the plug end cap.

[0013] Preferably, the waterproof connector assembly further includes a sealing body and a bushing; the sealing body and bushing are fitted onto the connected cable and are located inside the plug end cap.

[0014] Preferably, the waterproof connector assembly also includes a plug sealing ring installed between the plug connector sleeve and the socket housing.

[0015] Preferably, the connector further includes a flange socket sealing ring; the inner end of the socket housing is provided with a limiting connector; the limiting connector is inserted into the wiring hole of the battery box; the flange socket sealing ring is provided at the connection between the socket housing and the battery box.

[0016] Preferably, the socket housing and the plug connector sleeve are connected by a snap-fit ​​structure.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model provides matching bending structures on the sheet-like plug terminals and socket terminals, allowing the screws and nuts used for locking to be installed at an angle. This maintains vertical cable exit while making the structure of the waterproof cable exit terminals of the battery box more compact, significantly improving product space utilization, and is especially suitable for situations where the space for battery pack installation is limited.

[0019] 2. In this utility model, the locking screw and locking nut are independent of the connector base, which facilitates maintenance or replacement during use and reduces maintenance costs and time; at the same time, the nut limiting structure on the connector base can facilitate the positioning and installation of the locking nut. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0021] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0022] Figure 3 This is an exploded view of the present invention.

[0023] Figure 4 This is a three-dimensional schematic diagram of the waterproof connector assembly in this utility model.

[0024] Figure 5 This is a three-dimensional schematic diagram of the terminal block of this utility model.

[0025] Figure 6 This is a schematic diagram of the internal structure of the terminal block in this utility model.

[0026] Figure 7 This is a schematic diagram of the installation of the locking screw in this utility model.

[0027] Figure 8 This is a schematic diagram showing the snap-fit ​​connection between the waterproof head wiring assembly and the connector in this utility model.

[0028] Reference numerals in the attached diagram: 1. Waterproof connector assembly; 2. Connector socket; 3. Plug connector sleeve; 4. Plug sealing ring; 5. Plug tail cap; 6. Tail cap sealing ring; 7. Sealing body; 8. Plug terminal; 9. Bushing; 10. Socket housing; 11. Socket terminal; 12. Locking screw; 13. Locking nut; 14. Flange socket sealing ring; 15. Cable. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, a compact waterproof direct-out junction box for a battery pack includes a waterproof connector assembly 1 and a terminal block 2. The terminal block 2 is installed at the wiring hole of the battery pack. The waterproof connector assembly 1 and the terminal block 2 are sealed together to achieve electrical conductivity.

[0031] like Figure 4 As shown, the waterproof connector assembly 1 includes a plug connector sleeve 3, a plug sealing ring 4, a plug tail cover 5, a tail cover sealing ring 6, a sealing body 7, a plug terminal 8, and a bushing 9. The plug terminal 8 is fixed to and electrically connected to the end of the cable 15 to be connected. The plug connector sleeve 3, plug tail cover 5, sealing body 7, and bushing 9 are fitted onto the outside of the cable 15 to be connected. The sealing body 7 and bushing 9 are located in the inner cavity of the plug tail cover 5. The inner wall of the head end of the plug connector sleeve 3 has a snap-fit ​​insertion chamber. The plug sealing ring 4 is installed in the inner end of the insertion chamber of the plug connector sleeve 3. The external thread of the tail end of the plug connector sleeve 3 is screwed into the internal thread on the plug tail cover 5. The tail cover sealing ring 6 is located at the connection between the plug connector sleeve 3 and the plug tail cover 5 to achieve a sealed connection between the plug connector sleeve 3 and the plug tail cover 5. When the plug connector sleeve 3 and the plug tail cover 5 are tightened, the bushing 9 is axially limited by the plug terminal 8, the sealing body 7 is squeezed by the bushing 9, deforms radially inward to squeeze and fix the cable 15, and achieves a waterproof seal between the tail end of the waterproof connector assembly 1 and the cable 15.

[0032] like Figure 5 and 6 As shown, the power strip connector 2 includes a socket housing 10, socket terminals 11, locking screws 12, locking nuts 13, and a flange socket sealing ring 14. A limiting connector is provided at the inner end of the socket housing 10. The limiting connector is inserted into the wiring hole of the battery box. Both the plug terminal 8 and the socket terminal 11 are made of metal sheet structure. The outer end of the plug terminal 8 has a first bend; the first bend forms a 20° angle with the central axis of the power strip connector 2. The outer end of the socket terminal 11 has a second bend; the second bend forms a 20° angle with the central axis of the waterproof connector assembly 1. The shapes of the first and second bends match each other, and both have connection holes.

[0033] When the waterproof head wiring assembly 1 and the terminal block 2 are assembled together, the first bend and the second bend overlap and are fastened together by the connecting hole, bolt and nut and are electrically conductive; and the axes of the waterproof head wiring assembly 1 and the terminal block 2 coincide.

[0034] In this embodiment, a nut limiting structure is integrally formed in the inner cavity of the socket housing 10. The position of the nut limiting structure is aligned with the connecting hole on the second bend of the socket terminal 11. The limiting surface on the nut limiting structure matches the outer surface of the nut, providing circumferential limiting for the nut. The nut limiting structure and the removable locking nut 13 together form an open hexagonal nut fixing structure. The locking nut 13 can be inserted into the nut limiting structure of the socket housing 10 along the hexagonal sidewall. The hexagonal groove of the nut limiting structure is provided with protrusions to prevent the locking nut 13 from falling out.

[0035] In some embodiments, such as Figure 7 As shown, the minimum distance between the central axis of the nut limiting structure and the upper edge of the socket housing 10 is greater than the head diameter of the locking screw 12, so that the locking screw 12 can be directly screwed into the locking nut 13 at an angle by a tightening tool.

[0036] The bent and tilted stacking structure of the plug terminal 8 and the socket terminal 11 allows the locking screw 12 to be installed at an angle while keeping the axes of the waterproof head wiring assembly 1 and the terminal block 2 aligned, thus shortening the length of the entire waterproof outlet terminal and significantly improving the product's space utilization.

[0037] In some embodiments, the socket housing 10 is integrally formed by injection molding, and the bottom of the socket housing 10 is provided with a concave cavity for injection molding to form a nut limiting structure.

[0038] In some embodiments, a flange socket sealing ring 14 is provided at the connection between the socket housing 10 and the battery box. The inner end of the socket terminal 11 passes through the limiting joint of the socket housing 10 and extends into the battery box to connect with the target wiring position in the battery box. A raised flange structure is provided on the outer side of the socket housing 10; mounting holes are provided at the four corners of the raised flange structure. The mounting holes on the raised flange structure and the threaded holes around the wiring holes of the battery box are fixed by bolts to form a flange fastening structure. After the socket housing 10 is tightened to the battery box panel with bolts, the flange socket sealing ring 14 forms a sealing structure with the battery box panel and the socket housing 10.

[0039] In this embodiment, the socket housing 10 is provided with an ejector circular interface; the socket terminal 11 is located inside the circular outlet; the side wall of the socket housing 10 does not affect the tilting path of the locking screw 12.

[0040] In some embodiments, the bottom of the socket housing 10 has claws on both sides of the wire outlet position, and the socket terminal 11 is inserted into the bottom end to form a locking mechanism with the claws.

[0041] like Figure 8As shown, the outer surface of the socket housing 10 has a protruding snap-fit ​​structure; the side wall of the plug connector sleeve 3 has a slot structure; when the plug connector sleeve 3 is inserted downwards along the opening axis of the connector 2 to the bottom, the snap-fit ​​structure on the socket housing 10 and the slot structure on the plug connector sleeve 3 engage together to form a locking structure. Simultaneously, the plug sealing ring 4 forms a sealing structure between the plug connector sleeve 3 and the socket housing 10. This structure is simple and convenient to operate, reducing the probability of waterproofing failure.

[0042] This embodiment omits special processes such as nut fitting and riveting, simplifies the production process, reduces potential errors and costs, and improves product consistency and reliability. For large-scale production, it can significantly improve production efficiency and economic benefits.

[0043] As can be seen, this embodiment utilizes a compact, angled, stacked screw tightening structure, which improves product space utilization and better adapts to the requirements of insufficient space in battery pack installation locations. The connector uses a screw-mounted structure, facilitating maintenance and replacement. This structure eliminates special processes such as nut insertion and riveting, simplifying the production process, reducing potential errors and costs in production steps, and contributing to improved product consistency and reliability. For large-scale production, it can significantly improve production efficiency and economic benefits.

[0044] The working principle of this utility model is as follows:

[0045] Secure the connector 2 to the wiring port on the battery box panel. Place the locking nut 13 on the nut limiting structure of the socket housing 10; overlap the first bend of the plug terminal 8 with the second bend of the socket terminal 11, and use the locking screw 12 to pass through the connection hole on the plug terminal 8 and the socket terminal 11; use a tool to tighten the locking screw 12 and the locking nut 13. Insert and fix the plug connector 3, which is sleeved on the cable 15, into the socket housing 10; finally, tighten the tail cap sealing ring 6 so that the sealing body 7 deforms and locks the cable 15.

Claims

1. A compact waterproof direct-out junction box for a battery pack, comprising a waterproof connector assembly (1) and a connector base (2); the waterproof connector assembly (1) comprises a plug connector sleeve (3) and a plug terminal (8); characterized in that: The connector (2) includes a socket housing (10), a socket terminal (11), a locking screw (12), and a locking nut (13); the socket terminal (11) is installed in the socket housing (10); the plug terminal (8) is provided with a first bend; the socket terminal (11) is provided with a second bend; the first bend and the second bend overlap and are fixed by the locking screw (12) and the locking nut (13).

2. The compact waterproof direct-out junction box for a battery box according to claim 1, characterized in that: The angle formed by the central axis of the first bend and the connector (2) is equal to the angle formed by the central axis of the second bend and the waterproof head connector assembly (1), both being an angle of 15° to 50°; the central axis of the connector (2) coincides with that of the waterproof head connector assembly (1).

3. A compact waterproof direct-out junction box for a battery pack according to claim 2, characterized in that: The first and second bends are provided with corresponding connecting holes; the locking screw (12) passes through the connecting holes on the first and second bends and is screwed and fixed with the locking nut (13).

4. A compact waterproof direct-out junction box for a battery pack according to claim 3, characterized in that: The socket housing (10) has an integrally formed nut limiting structure in its inner cavity; the nut limiting structure is aligned with the connecting hole on the second bend of the socket terminal (11); the limiting surface on the nut limiting structure matches the outer surface of the nut.

5. A compact waterproof direct-out junction box for a battery pack according to claim 4, characterized in that: The nut limiting structure is provided with a hexagonal groove for constraining the nut; a portion of the side of the hexagonal groove is provided with a protrusion structure.

6. A compact, waterproof, direct-out junction box for a battery pack according to claim 1, characterized in that: The waterproof connector assembly (1) also includes a plug end cap (5) and a end cap sealing ring (6); the end of the plug connector sleeve (3) is threadedly connected to the plug end cap (5); the end cap sealing ring (6) is located at the connection between the plug connector sleeve (3) and the plug end cap (5).

7. A compact waterproof direct-out junction box for a battery pack according to claim 6, characterized in that: The waterproof connector assembly (1) also includes a sealing body (7) and a bushing (9); the sealing body (7) and the bushing (9) are fitted onto the connected cable (15) and are located in the inner cavity of the plug end cap (5).

8. A compact waterproof direct-out junction box for a battery pack according to claim 1, characterized in that: The waterproof connector assembly (1) also includes a plug seal (4) installed between the plug connector sleeve (3) and the socket housing (10).

9. A compact waterproof direct-out junction box for a battery pack according to claim 1, characterized in that: The connector (2) also includes a flange socket sealing ring (14); the inner end of the socket housing (10) is provided with a limiting connector; the limiting connector is inserted into the wiring hole of the battery box; the flange socket sealing ring (14) is provided at the connection between the socket housing (10) and the battery box.

10. A compact, waterproof, direct-out junction box for a battery pack according to claim 1, characterized in that: The socket housing (10) and the plug connector sleeve (3) are connected by a snap-fit ​​structure.

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