A multi-functional terminal block for an energy storage converter

Abstract

This utility model relates to the field of power equipment connection technology, and in particular to a multifunctional terminal box for an energy storage converter. It includes a box body with multiple inlet ports on both sides. A waterproof cover with a rubber sealing strip is installed on the top of the box body, and a rectangular fitting groove on the box body achieves surface sealing, ensuring the sealing of the wiring cavity. Simultaneously, a threaded connection sleeve with a rubber sealing sleeve is provided at the inlet end, achieving axial compression and radial sealing during cable threading, effectively preventing the intrusion of external contaminants such as moisture, dust, and salt spray. This significantly improves the operational reliability of the equipment in harsh environments such as outdoors and in humid conditions. Furthermore, flame-retardant insulating partitions are installed on all four side walls inside the box body, forming a physical isolation barrier between adjacent high-voltage terminals, effectively extending the creepage distance, suppressing arc propagation and partial discharge, reducing the risk of phase-to-phase short circuits or grounding breakdown, and meeting the requirements of high-voltage energy storage systems for electrical clearance and insulation performance.

Description

Technical Field

[0001] This utility model relates to the field of power equipment connection technology, and in particular to a multi-functional terminal box for an energy storage converter. Background Technology

[0002] Energy storage converters are the core equipment in energy storage systems, mainly used to realize bidirectional conversion of electrical energy between AC and DC. They are widely used in new energy power generation, grid frequency regulation, industrial and commercial energy storage, and residential energy storage. In practical engineering applications, energy storage converters need to be connected to various types of cables, including high-voltage DC cables, AC output and input cables, as well as various communication and control signal lines. The centralized introduction, branch connection, and electrical fixation of these cables are usually accomplished through matching terminal boxes. Therefore, terminal boxes are not only the physical interface for power transmission and signal access, but also key components to ensure the electrical safety, electromagnetic compatibility, and long-term reliable operation of the system.

[0003] Currently, traditional terminal boxes mostly adopt a simple structural and single-function design, typically containing only basic conductive terminal blocks and metal or engineering plastic shells. They lack systematic protection and safety design, revealing many problems in actual operation: Existing terminal boxes generally lack an effective overall waterproof sealing structure. In outdoor, high humidity, salt spray, or large temperature difference environments, moisture can easily penetrate the box through weak points such as inlet holes and cover plate seams, leading to oxidation and corrosion of terminal blocks, aging of insulation materials, and a decrease in creepage distance. In severe cases, this can cause short circuits, leakage, or even fires, greatly affecting the safety and service life of the system. In addition, traditional terminal boxes usually lack effective insulation isolation structures inside, and there is a lack of physical barriers between adjacent high-voltage terminals. Under conditions of impurities or partial discharge, phase-to-phase flashover or grounding breakdown can easily occur, posing serious safety hazards.

[0004] Therefore, there is an urgent need to provide a multi-functional terminal box for energy storage converters that has effective sealing protection and insulation isolation. Utility Model Content

[0005] In order to overcome the shortcomings of poor overall sealing performance and lack of effective insulation isolation structure in the existing terminal box, which poses safety hazards, this utility model provides a multi-functional terminal box for energy storage converters with effective sealing protection and insulation isolation.

[0006] To address the aforementioned problems, this utility model adopts the following technical solution: A multifunctional terminal box for an energy storage converter includes a box body with multiple cable entry ports on both sides. Each cable entry port has an annular external thread groove on its outer periphery, and a threaded connecting sleeve is threaded onto it. A rubber sealing sleeve is provided inside the threaded connecting sleeve. Multiple handles are provided circumferentially on the outer wall of the threaded connecting sleeve. A waterproof cover is provided on the top of the box body. The corners of the waterproof cover are fixed to the corresponding mounting holes in the box body by countersunk screws. A rubber sealing strip is provided at the bottom of the waterproof cover. A rectangular fitting groove matching the rubber sealing strip is provided on the top of the box body. A flame-retardant insulating partition is fitted on the inner side wall of the box body. Multiple circular positioning protrusions are provided on the side of the flame-retardant insulating partition facing the inner cavity of the box body, and a circular groove matching the circular positioning protrusions is provided on the inner wall of the box body.

[0007] In a preferred embodiment of the present invention, each of the incoming ports is provided with a prompting plate on its side, and the surface of the plate is provided with an identification area.

[0008] In a preferred embodiment of this utility model, the grip bar is covered with an anti-slip sleeve.

[0009] In a preferred embodiment of this utility model, a transparent observation plate is embedded in the middle of the waterproof cover.

[0010] In a preferred embodiment of this utility model, handles are provided on both sides of the waterproof cover.

[0011] In a preferred embodiment of the present invention, multiple fixing plates are provided on the outer two side walls of the box body, and arc-shaped limiting clamps are provided on the fixing plates.

[0012] In a preferred embodiment of this utility model, the inner contour of the arc-shaped limiting clamp is an arc-shaped structure that matches the outer diameter of the cable.

[0013] In a preferred embodiment of the present invention, an elastic protective pad layer is provided on the inner surface of the arc-shaped structure of the arc-shaped limiting clamp.

[0014] In a preferred embodiment of this utility model, dehumidification frames are installed on both sides of the box body. The main body of the dehumidification frame is a hollow box-shaped structure. The dehumidification frame is connected to the inner cavity of the box body through a ventilation channel to realize the directional circulation of internal air and humidity exchange. A card plate is fixed on the dehumidification frame. The two side walls of the box body are provided with card slots that match the card plate. A push-pull sealing plate is provided on the top of the dehumidification frame.

[0015] In a preferred embodiment of this utility model, a carding ball is provided inside the card slot, and a carding hole matching the carding ball is provided on the carding plate.

[0016] Compared with the prior art, the present invention has the following technical effects: 1. By installing a waterproof cover with a rubber sealing strip on the top of the box and using it in conjunction with a rectangular fitting groove on the box to achieve surface sealing, the sealing performance of the wiring cavity is ensured. At the same time, a threaded connection sleeve with a rubber sealing sleeve is installed at the inlet end to achieve axial compression and radial sealing during cable threading, effectively preventing the intrusion of external pollutants such as moisture, dust, and salt spray, significantly improving the operational reliability of the equipment in harsh environments such as outdoors and in humid conditions. In addition, flame-retardant insulating partitions are installed on all four side walls inside the box, which can form a physical isolation barrier between adjacent high-voltage terminals, effectively extending the creepage distance, suppressing arc propagation and partial discharge, reducing the risk of phase-to-phase short circuits or grounding breakdown, and meeting the requirements of high-voltage energy storage systems for electrical clearance and insulation performance.

[0017] 2. By setting fixed plates and arc-shaped limiting clamps evenly distributed along the length direction on the outside of the box, and lining it with elastic protective pads, the incoming cables can be arranged in an orderly manner, the bending radius can be controlled and mechanically fixed, so as to avoid the cables from loosening or being damaged due to vibration, pulling or electromagnetic force, ensuring the long-term reliability of electrical connections, while improving the aesthetics of the on-site wiring process and the visibility of maintenance.

[0018] 3. By setting detachable dehumidification frames on both sides of the box, which are filled with high-efficiency moisture-absorbing material and connected to the inner cavity of the box through ventilation channels, the internal moisture is continuously absorbed, preventing condensation caused by temperature differences and further enhancing the long-term moisture resistance of the equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional sectional view of the components of this utility model, including the box body, waterproof cover, and transparent observation plate.

[0021] Figure 3 This is a partial sectional view of the components of this utility model, including the inlet port, flame-retardant insulating partition, and rubber sealing strip.

[0022] Figure 4 This is a three-dimensional sectional view of the threaded connecting sleeve, rubber sealing sleeve, and handle rod of this utility model.

[0023] Figure 5 This is a three-dimensional sectional view of the components of this utility model, including the fixing plate, the arc-shaped limiting clamp, and the elastic protective pad.

[0024] Figure 6 This is a three-dimensional sectional view of the dehumidification frame, card plate, and sealing plate of this utility model.

[0025] The above-mentioned attached drawings include the following reference numerals: 1. Box body, 2. Inlet port, 3. Indication plate, 4. Threaded connection sleeve, 5. Rubber sealing sleeve, 6. Handle, 7. Anti-slip sleeve, 8. Waterproof cover, 9. Countersunk screw, 10. Transparent observation plate, 11. Handle, 12. Rubber sealing strip, 13. Flame-retardant insulating partition, 14. Circular positioning protrusion, 15. Fixing plate, 16. Arc-shaped limiting clamp, 17. Elastic protective pad, 18. Dehumidification frame, 19. Clamping plate, 20. Sealing plate, 21. Clamping ball. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1 Please see Figures 1-4A multi-functional terminal box for an energy storage converter includes a box body 1. Three cable entry ports 2 are evenly spaced along the length of the front and rear sides of the box body 1 for cable insertion. Each cable entry port 2 has a side indicator plate 3 with a marking area for labeling cable number, phase sequence information, voltage level, function type, or QR code. Each cable entry port 2 has an annular external thread groove on its outer periphery, on which a threaded connecting sleeve 4 is threadedly connected. A rubber sealing sleeve 5 is provided inside the threaded connecting sleeve 4. The rubber sealing sleeve 5 undergoes radial deformation under axial compression, tightly covering the cable sheath and filling the gaps between the threaded connecting sleeves 4, achieving a waterproof effect. Three handles 6 are provided circumferentially on the outer wall of the threaded connecting sleeve 4. The handles 6 are designed for easy manual rotation of the threaded connecting sleeve 4. Anti-slip sleeves 7 are fitted on the outside of the handles 6 to effectively increase hand friction and prevent slippage. A waterproof cover 8 is provided on the top of the box body 1, with its four corners fixed to the top by countersunk screws 9. The housing 1 has corresponding mounting holes. A transparent observation plate 10 is embedded in the middle of the waterproof cover 8, which facilitates visual inspection of the internal wiring status, labels, and operating indicators without opening the cover. Handles 11 are provided on both the left and right sides of the waterproof cover 8 for manual opening and closing. A rubber sealing strip 12 is provided at the bottom of the waterproof cover 8. A rectangular fitting groove matching the rubber sealing strip 12 is provided at the top of the housing 1. When the waterproof cover 8 is closed, the rubber sealing strip 12 is fully embedded in the fitting groove and compressed to form a reliable surface contact sealing structure, further enhancing the overall protection level. Flame-retardant insulating partitions 13 are installed on the four internal side walls of the housing 1. Two circular positioning protrusions 14 are provided on the side of the flame-retardant insulating partition 13 facing the inner cavity of the housing 1. A circular groove matching the circular positioning protrusions 14 is provided on the inner wall of the housing 1. By embedding the circular positioning protrusions 14 into the circular groove, boltless quick positioning and installation of the flame-retardant insulating partition 13 can be achieved.

[0028] In use, first select the corresponding inlet port 2 according to the number and location of the incoming cables, and then pass the cables through the rubber sealing sleeves 5 inside the corresponding threaded connection sleeves 4 in sequence. During this process, the internal rubber sealing sleeves 5 undergo controllable compression deformation, achieving dynamic sealing between the outer diameter of the cable and the inner wall of the threaded connection sleeves 4, effectively preventing moisture and dust from entering the interior of the box 1 along the cable. Subsequently, the cable is inserted into the interior of the box 1. After the cable and the terminal block are crimped or bolted inside the box 1, the waterproof cover 8 is placed on top of the box 1, and the bottom rubber sealing strip 12 is fully embedded in the rectangular fitting groove. Then, tighten the countersunk screws 9 around the box to ensure that the waterproof cover 8 seals evenly and reliably. At this time, the entire wiring area is in a fully enclosed, highly protected environment, maintaining good waterproof sealing performance. In addition, during use, the insulating partition set inside the box 1 effectively suppresses the development of partial discharge, blocks the arc propagation path, and improves the safety level of the equipment.

[0029] Example 2 Based on Example 1, please refer to Figure 5 The outer front and rear side walls of the box 1 are evenly spaced along the length direction with three fixing plates 15. Each fixing plate 15 is provided with an arc-shaped limiting clamp 16. The inner contour of the arc-shaped limiting clamp 16 is an arc-shaped structure that matches the outer diameter of the cable. Its inner surface is provided with an elastic protective pad 17 to prevent the arc-shaped limiting clamp 16 from damaging the cable sheath and to enhance the clamping friction and improve the overall pull-out resistance.

[0030] After the cable is introduced from the inlet port 2 and the terminal connection is completed, each cable can be embedded into the arc-shaped limiting clamp 16 at the corresponding position in sequence, thereby realizing the orderly arrangement and mechanical fixation of the cable. This structure can not only effectively constrain the bending radius at the cable inlet and outlet, preventing conductor damage or insulation layer rupture due to excessive bending, but also suppress cable movement caused by external vibration during operation, avoid additional stress on the terminal connection point, and ensure the long-term reliability of the electrical connection.

[0031] Example 3 Based on Example 2, please refer to Figure 6The box body 1 has dehumidification frames 18 installed on both the left and right sides. The main body of the dehumidification frame 18 is a hollow box-shaped structure. The dehumidification frame 18 is connected to the inner cavity of the box body 1 through a ventilation channel to realize the directional circulation of internal air and humidity exchange. A card plate 19 is fixed to the dehumidification frame 18. The two side walls of the box body 1 are provided with card slots that match the card plate 19. The card plate 19 and the card slot form an insertion structure, which facilitates the quick installation and replacement of the dehumidification components. A push-pull sealing plate 20 is provided on the top of the dehumidification frame 18. A locking ball 21 is provided inside the card slot. The card plate 19 is provided with a locking hole that matches the locking ball 21. The locking ball 21 is inserted into the locking hole to form a reliable mechanical lock to prevent the dehumidification frame 18 from loosening due to vibration or external force.

[0032] When dehumidification is required during use, the dehumidification component can be installed as desired. After installation, the sealing cover is opened by sliding it horizontally outward to expose the internal chamber of the dehumidification frame 18. Then, highly efficient physical adsorption or chemical moisture-absorbing materials, such as color-changing silica gel, molecular sieves, calcium chloride-based desiccants, etc., are filled in. The moisture-absorbing materials can be directly removed and replaced when they become ineffective. After the sealing plate 20 is closed, the humid air inside the box 1 slowly enters the dehumidification frame 18 through the ventilation channel under the drive of temperature difference and concentration gradient. The moisture is efficiently adsorbed, and the dry air is circulated back, thereby continuously reducing the relative humidity of the environment inside the box 1 and preventing condensation. This effectively inhibits the risk of insulation degradation, metal corrosion, and creepage caused by condensation, and extends the service life of the internal electrical components.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-functional terminal block for an energy storage converter, comprising a box body (1), wherein multiple inlet ports (2) are provided on both sides of the box body (1), characterized in that: Each of the inlet ports (2) has an annular external thread groove on its outer periphery, and a threaded connecting sleeve (4) is threaded onto it. A rubber sealing sleeve (5) is provided inside the threaded connecting sleeve (4). Multiple handles (6) are provided on the outer wall of the threaded connecting sleeve (4) along the circumferential direction. A waterproof cover (8) is provided on the top of the box body (1). The corners of the waterproof cover (8) are fixed to the corresponding mounting holes of the box body (1) by countersunk screws (9). A rubber sealing strip (12) is provided at the bottom of the waterproof cover (8). A rectangular fitting groove matching the rubber sealing strip (12) is provided on the top of the box body (1). A flame-retardant insulating partition (13) is assembled on the inner side wall of the box body (1). Multiple circular positioning protrusions (14) are provided on the side of the flame-retardant insulating partition (13) facing the inner cavity of the box body (1), and a circular groove matching the circular positioning protrusions (14) is provided on the inner wall of the box body (1).

2. The multi-functional terminal box for an energy storage converter as described in claim 1, characterized in that: Each of the incoming ports (2) is provided with a prompt plate (3) on its side, and its surface is provided with an identification area.

3. A multi-functional terminal block for an energy storage converter as described in claim 2, characterized in that: The grip (6) is covered with an anti-slip sleeve (7).

4. A multi-functional terminal block for an energy storage converter as described in claim 3, characterized in that: A transparent observation plate (10) is embedded in the middle of the waterproof cover (8).

5. A multi-functional terminal block for an energy storage converter as described in claim 4, characterized in that: The waterproof cover (8) has handles (11) on both sides.

6. A multi-functional terminal block for an energy storage converter as described in claim 5, characterized in that: The outer two side walls of the box (1) are provided with multiple fixing plates (15), and the fixing plates (15) are provided with arc-shaped limiting clamps (16).

7. A multi-functional terminal block for an energy storage converter as described in claim 6, characterized in that: The inner contour of the arc-shaped limiting clamp (16) is an arc-shaped structure that matches the outer diameter of the cable.

8. A multi-functional terminal block for an energy storage converter as described in claim 7, characterized in that: The inner surface of the arc-shaped structure of the arc-shaped limiting clamp (16) is provided with an elastic protective pad layer (17).

9. A multi-functional terminal block for an energy storage converter as described in claim 8, characterized in that: Dehumidification frames (18) are installed on both sides of the box body (1). The main body of the dehumidification frame (18) is a hollow box-shaped structure. The dehumidification frame (18) is connected to the inner cavity of the box body (1) through the ventilation channel to realize the directional circulation of internal air and humidity exchange. A card plate (19) is fixed on the dehumidification frame (18). The two side walls of the box body (1) are provided with card slots that match the card plate (19). A push-pull sealing plate (20) is provided on the top of the dehumidification frame (18).

10. A multi-functional terminal block for an energy storage converter as described in claim 9, characterized in that: The slot is provided with a ball (21), and the card plate (19) is provided with a card hole that matches the ball (21).

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