Junction box and energy storage equipment

Abstract

The utility model provides a junction box and energy storage equipment, and relates to the technical field of energy storage all-in-one machines, the junction box comprises a box body, the box body is provided with a wiring chamber, a first mounting surface and a second mounting surface; the first mounting surface is used for connecting the energy storage battery, and the first mounting surface is provided with a first through hole for communicating the wiring chamber with an external space, so that the first wire penetrates through the first through hole and extends into the wiring chamber; the second mounting surface is used for connecting the inverter, and the second mounting surface is provided with a second through hole which is communicated with the wiring chamber and the external space, so that the second wire passes through the second through hole and extends into the wiring chamber. Potential safety hazards caused by wire exposure are avoided, the difficulty of wire connection and arrangement is reduced, and maintenance and repair of energy storage equipment are facilitated.

Description

Technical Field

[0001] This application belongs to the technical field of energy storage equipment, and more specifically, relates to a junction box and energy storage equipment. Background Technology

[0002] Energy storage devices, as a key hub in modern energy systems, play a vital role in renewable energy grid integration, grid peak shaving, and emergency power supply. By storing surplus electricity from clean energy sources such as photovoltaics and wind power, they release energy during off-peak hours or peak demand periods, significantly improving grid stability and energy efficiency. On the user side, energy storage devices can be integrated into residential or commercial settings to achieve self-consumption of electricity and peak-valley electricity price arbitrage, reducing energy costs while contributing to a low-carbon transition.

[0003] Energy storage devices typically consist of an inverter and a battery. The battery and inverter are connected by numerous wires. To conceal these cables and improve aesthetics, space is typically reserved inside the inverter or battery for cable management. However, this limited space restricts the structural design of the battery and inverter, leading to a dense and messy cable arrangement. This not only increases the risk of overheating and short circuits but also makes future maintenance and repair more difficult. Utility Model Content

[0004] The purpose of this application is to provide a junction box and energy storage device to solve the problems of dense and messy wire arrangement and difficult maintenance and repair in the prior art.

[0005] To achieve the above objectives, in a first aspect, this application provides a junction box, the box body having a wiring chamber, a first mounting surface, and a second mounting surface; the first mounting surface is used to connect the energy storage battery, and the first mounting surface has a first through hole communicating with the wiring chamber and an external space, so that the first wire passes through the first through hole and extends into the wiring chamber; the second mounting surface is used to connect the inverter, and the second mounting surface has a second through hole communicating with the wiring chamber and an external space, so that the second wire passes through the second through hole and extends into the wiring chamber.

[0006] In some embodiments, the energy storage device further includes at least one set of fixing components, the fixing components including a support rod and at least one cable clamp, the support rod being fixedly disposed in the wiring chamber, the cable clamp being slidably connected to the support rod, and the cable clamp being used to fix the first conductor and / or the second conductor.

[0007] In some embodiments, the cable clamp includes a fixing block and a cable block; the fixing block has a groove and is slidably fitted onto the support rod through the groove; the cable block is connected to the fixing block and has at least one cable clamping groove for fixing the first wire and / or the second wire.

[0008] In some embodiments, the cable clamp further includes a latch and a drive plate; the latch is slidably disposed on the fixing block along a direction perpendicular to the extension of the support rod, the support rod has multiple slots arranged at intervals along the extension direction of the support rod, and the latch is inserted into the slot opposite to the position of the fixing block; the drive plate is rotatably connected to the fixing block, and the drive plate has an arc-shaped eccentric groove on the side facing the support rod, the center line of the eccentric groove being parallel and spaced apart from the rotation axis of the drive plate; the latch has a protrusion on the side facing the drive plate, and the protrusion is slidably embedded in the eccentric groove.

[0009] In some embodiments, the cable clamp further includes an elastic element disposed between the fixing block and the latch, for applying a spring force to the latch toward the support rod.

[0010] In some embodiments, the width of the latch perpendicular to its sliding direction gradually increases as it approaches the support rod.

[0011] In some embodiments, the cable block is provided with a rotating shaft, the fixing block has a connecting hole, and the rotating shaft is rotatably disposed in the connecting hole.

[0012] In some embodiments, the rotating shaft includes a shaft connected to the cable block and a damping sleeve sleeved on the shaft.

[0013] In some embodiments, the junction box further includes a cover, the junction chamber has an opening, the cover is movably connected to the box body, and closes the opening.

[0014] On the other hand, this application provides an energy storage device, including an energy storage battery, an inverter, and a junction box as described in the first aspect embodiment, wherein the first mounting surface of the junction box is connected to the energy storage battery, and the second mounting surface of the junction box is connected to the inverter.

[0015] The advantages of the junction box and energy storage device provided in this application are as follows: Compared with the prior art, by installing a junction box between the energy storage battery and the inverter, the wires of the energy storage battery pass through the first through hole into the inside of the junction box, and the wires of the inverter pass through the second through hole into the inside of the junction box, so that the wires of the energy storage battery and the inverter can be connected and arranged inside the junction box, simplifying the structural design of the energy storage battery and the inverter, and facilitating the maintenance and repair of the energy storage device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the energy storage device in the embodiments of this application;

[0018] Figure 2 This is an exploded view of the energy storage device in the embodiments of this application;

[0019] Figure 3 This is a partial schematic diagram of the fixing component in an embodiment of this application;

[0020] Figure 4 This is an exploded view of the ribbon cable clamp in an embodiment of this application;

[0021] Figure 5 yes Figure 3 A cross-sectional view along the AA direction;

[0022] Figure 6 yes Figure 5 Cross-sectional view along the BB direction;

[0023] Figure 7 yes Figure 5 A cross-sectional view in the middle BB direction under another condition.

[0024] The following are the labeling elements in the figure:

[0025] 100 - Energy storage battery; 101 - First conductor; 200 - Inverter; 201 - Second conductor; 300 - Junction box; 310 - Box body; 311 - Wiring chamber; 312 - First through hole; 313 - Second through hole; 310a - First mounting surface; 310b - Second mounting surface; 320 - Cover; 330 - Support rod; 331 - Slot; 340 - Cable clip; 341 - Fixing block; 3411 - Slide groove; 3412 - Mounting groove; 3413 - Connection hole; 342 - Cable block; 3421 - Cable slot; 343 - Lock; 3431 - Protrusion; 344 - Drive disk; 3441 - Eccentric groove; 345 - Elastic element; 346 - Shaft; 3461 - Shaft body; 3462 - Damping sleeve; 400 - Auxiliary electronic components. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] like Figure 1 As shown in the figure, this application provides an energy storage device, including an energy storage battery 100, an inverter 200, and a junction box 300, wherein the junction box 300 is connected between the energy storage battery 100 and the inverter 200.

[0031] The energy storage battery 100 is used to store electrical energy and provide a stable output current. The energy storage battery 100 may include several battery modules, and the number of battery modules can be adjusted according to the user's needs. For example, multiple battery modules connected in series can be used to increase the overall energy storage capacity and output power of the energy storage battery 100. The multiple battery modules can be stacked in a vertical or other orientation.

[0032] Inverter 200 is used to convert the DC power supplied by energy storage battery 100 into AC power. Inverter 200 can be installed above energy storage battery 100 or in other locations via junction box 300 to facilitate heat dissipation and maintenance during use. Inverter 200 and energy storage battery 100 are connected by wires. Specifically, energy storage battery 100 has multiple first wires 101, and inverter 200 has multiple second wires 201. When connecting inverter 200 and energy storage battery 100, corresponding first wires 101 and second wires 201 are connected to connect the circuits of inverter 200 and energy storage battery 100.

[0033] The junction box 300 is located between the inverter 200 and the energy storage battery 100. It is used to accommodate multiple first wires 101 and second wires 201, preventing the first wires 101 and second wires 201 from being exposed, improving the safety and aesthetics of the equipment, and providing a large wiring space to facilitate the connection and arrangement of wires.

[0034] like Figure 2 As shown, the junction box 300 provided in this embodiment includes a box body 310, a wiring chamber 311, and a first mounting surface 310a and a second mounting surface 310b. The first mounting surface 310a is used to connect the energy storage battery 100, and the first mounting surface 310a has a first through hole 312 connecting the wiring chamber 311 and the external space, so that the first wire 101 of the energy storage battery 100 passes through the first through hole 312 and extends into the wiring chamber 311. The second mounting surface 310b is used to connect the inverter 200, and the second mounting surface 310b has a second through hole 313 connecting the wiring chamber 311 and the external space, so that the second wire 201 of the inverter 200 passes through the second through hole 313 and extends into the wiring chamber 311, so that the first wire 101 and the second wire 201 can be connected in the wiring chamber 311.

[0035] Specifically, the housing 310 is a shell structure made of metal or plastic. The shape of the housing 310 can be a cuboid, cylinder, or other shape suitable for installation between the energy storage battery 100 and the inverter 200, ensuring a compact structure and easy heat dissipation. The first mounting surface 310a and the second mounting surface 310b are both outer surfaces of the housing 310. When the battery module, junction box 300, and inverter 200 are stacked vertically, the first mounting surface 310a can be the lower surface of the housing 310, and the second mounting surface 310b can be the upper surface of the housing 310. The connection between the first mounting surface 310a and the battery module, and the connection between the second mounting surface 310b and the inverter 200, can be secured with bolts or secured with latches 343 for easy installation and disassembly.

[0036] The first through hole 312 is a circular or rectangular hole that passes through the first mounting surface 310a. The position of the first through hole 312 can be adapted to the lead-out position of the first wire 101 in the energy storage battery 100. For example, if the first wire 101 extends upward from one side edge of the battery module, the first through hole 312 can be located at the edge of the first mounting surface 310a accordingly. The second through hole 313 is a circular or rectangular hole that passes through the second mounting surface 310b. The position of the second through hole 313 can also be adapted to the lead-out position of the second wire 201 in the inverter 200. For example, the shape and size of the second through hole 313 match the bottom end face of the inverter 200. When the inverter 200 is installed on the junction box 300, the bottom end face of the inverter 200 is embedded in the second through hole 313 so that the second wire 201 leading out from the bottom of the inverter 200 extends into the wiring chamber 311.

[0037] By installing a junction box 300 between the energy storage battery 100 and the inverter 200, the first wire 101 and the second wire 201 can be connected and arranged within the wiring chamber 311 of the junction box 300. This avoids the safety hazards caused by exposed wires, maintains the aesthetics of the overall equipment, facilitates wire connection and arrangement, reduces maintenance difficulty and failure rate, and eliminates the need to reserve additional wiring space in the energy storage battery 100 or the inverter 200, thus benefiting the structural design of the energy storage battery 100 and the inverter 200. Furthermore, auxiliary electronic devices 400, such as fuses and relays, connecting between the battery module and the inverter 200 can be installed within the junction box 300, facilitating the connection of the first wire 101 and the second wire 201 to these auxiliary electronic devices 400.

[0038] In some embodiments, the wiring chamber 311 may have an opening, and the junction box 300 further includes a cover 320, which is movably connected to the box body 310 and closes the opening of the wiring chamber 311. Specifically, the cover 320 may be connected to the box body 310 by means of hinges or latches 343, etc., to facilitate opening and closing of the opening, thereby facilitating the inspection and maintenance of the internal wires.

[0039] In some embodiments, the junction box 300 further includes at least one set of fixing components disposed within the wiring chamber 311 for fixing the first guide and / or the second wire 201, so that the first wire 101 and the second wire 201 can be stably arranged within the wiring chamber 311. Optionally, two sets of fixing components are disposed within the wiring chamber 311, one set of fixing components being near the first through hole 312 for fixing multiple first wires 101 extending into the wiring chamber 311 from the first through hole 312; the other set of fixing components being near the second through hole 313 for fixing multiple second wires 201 extending into the wiring chamber 311 from the second through hole 313.

[0040] like Figure 2 and Figure 3 As shown, the fixing assembly includes a support rod 330 and at least one cable clamp 340. The support rod 330 is fixedly connected to the housing 310, and the cable clamp 340 is slidably disposed on the support rod 330. Specifically, the support rod 330 is a long rod with a circular, rectangular, or other geometric cross-sectional shape. The support rod 330 can be horizontally disposed in the wiring chamber 311, and both extended ends of the support rod 330 are connected and fixed to the inner wall of the housing 310. The cable clamp 340 is used to fix the wires (first wire 101 or second wire 201). The cable clamp 340 can slide along the extension direction of the support rod 330 to adapt to the lead-out position, connection method, and arrangement of the wires. The number of cable clamps 340 can be adjusted according to the number of wires to meet different wiring needs of users. The wires can be fixed to the cable clamp 340 by binding or locking with a buckle 343.

[0041] Combination Figure 4 and Figure 5 As shown, in some embodiments, the cable clip 340 may include a fixing block 341 and a cable block 342. The fixing block 341 has a sliding groove 3411 and is slidably fitted onto the support rod 330 through the sliding groove 3411. The cable block 342 is connected to the fixing block 341, and at least one cable clamping groove 3421 is provided on the side of the cable block 342 facing away from the fixing block 341.

[0042] Specifically, the fixing block 341 is a block structure with a certain volume. The shape of the sliding groove 3411 matches the cross-section of the support rod 330 and extends through the fixing block 341 along the extension direction of the support rod 330, so that the fixing block 341 can slide along the extension direction of the support rod 330. The sliding groove 3411 can be provided with an opening on the side of the fixing block 341 facing away from the connector. The opening width of the sliding groove 3411 is slightly smaller than the diameter of the support rod 330, and a chamfer structure is provided at the edge of the opening of the sliding groove 3411. This allows the fixing block 341 to be engaged with or disassembled from the support rod 330 by utilizing the elastic change of the two sides of the opening of the sliding groove 3411, realizing the quick connection and disassembly of the ribbon cable clip 340 and the support rod 330. In addition, the number of ribbon cable clips 340 on each support rod 330 can be adjusted according to the usage requirements.

[0043] The cable tray 342 is also a block structure with a certain volume. The cable retaining groove 3421 can be formed on the cable tray 342 in a vertical or other direction. The shape of the cable retaining groove 3421 can be rectangular, circular, or other geometric shapes adapted to the shape of the wire. For example, the cross-sectional shape of the cable retaining groove 3421 perpendicular to its extension direction is rectangular. The width and depth of the cable retaining groove 3421 should be greater than the diameter of the wire to accommodate it. The side of the cable retaining groove 3421 facing away from the fixing block 341 should be open, and the opening of the cable retaining groove 3421 should be slightly smaller than the diameter of the wire. This allows the wire to be embedded into the cable retaining groove 3421 through the elastic change of the insulation layer on the outer surface of the wire, making it difficult for the wire to fall out of the cable retaining groove 3421, thus achieving the function of fixing the wire. The number of cable retaining grooves 3421 can be set to one or more depending on the number of wires to be fixed. When multiple cable retaining grooves 3421 are provided, they can be arranged parallel to each other and spaced apart.

[0044] The fixing block 341 is fixedly connected to the ribbon cable block 342, or they can be movably connected. For example, the ribbon cable block 342 has a rotating shaft 346 on the side facing the fixing block 341, and the fixing block 341 has a connecting hole 3413. The rotating shaft 346 is rotatably disposed in the connecting hole 3413, so that the ribbon cable block 342 can rotate around the rotating shaft 346, thereby fixing the wire at different angles.

[0045] Furthermore, the rotating shaft 346 may include a shaft body 3461 and a damping sleeve 3462 sleeved on the shaft body 3461. One end of the shaft body 3461 is connected and fixed to the cable block 342 by screws, and the other end, together with the damping sleeve 3462, is inserted into the connecting hole 3413. The outer surface of the damping sleeve 3462 contacts the inner wall of the connecting hole 3413, providing appropriate damping force so that the cable block 342 rotates smoothly and is not easily loosened. The damping sleeve 3462 is made of an elastic material such as rubber.

[0046] Combination Figure 6 and Figure 7 As shown, in some embodiments, the cable clip 340 may further include a latch 343 and a drive disk 344. The latch 343 is slidably connected to the fixing block 341 along a direction perpendicular to the extension of the support rod 330. The support rod 330 has multiple slots 331, which are spaced apart along the extension direction of the support rod 330. The latch 343 can be inserted into any one of the slots 331. The drive disk 344 is rotatably connected to the fixing block 341. The drive disk 344 has an eccentric groove 3441 on the side facing the support rod 330. The eccentric groove 3441 is arc-shaped, and its center line is parallel to and spaced apart from the rotation axis of the drive disk 344. The latch 343 has a protrusion 3431 on the side facing the drive disk 344, which is slidably embedded in the eccentric groove 3441.

[0047] Specifically, the fixing block 341 may have a mounting groove 3412 extending vertically, and the mounting groove 3412 is connected to the sliding groove 3411, so that the opening of the slot 331 on the support rod 330 can be exposed in the mounting groove 3412. The latch 343 is slidably embedded in the mounting groove 3412, so that it can slide downward and embed into the corresponding slot 331, locking the movement of the fixing block 341 on the support rod 330.

[0048] The drive disc 344 is a circular disc, and its rotation axis can coincide with the axis of the rotating shaft 346. For example, the drive disc 344 has a central hole, and a portion of the rotating shaft 346 passes through the central hole, allowing the drive disc 344 to rotate around the rotating shaft 346. The through hole of the drive disc 344 and the rotating shaft 346 can be clearance-fitted or fitted with a bearing to prevent the rotation of the drive disc 344 from causing the cable tray 342 to rotate. A circular receiving groove can be provided on the side of the fixing block 341 facing the cable tray 342, and the drive disc 344 is entirely embedded in the receiving groove, making the overall structure of the cable clip 340 more compact. Furthermore, the diameter of the drive disc 344 should be larger than the width of the cable tray 342 in the extending direction of the support rod 330, so that a portion of the drive disc 344 is exposed on the outside of the cable tray 342, facilitating manual selection of the drive disc 344 by the user.

[0049] When the drive disc 344 rotates, the eccentric groove 3441 drives the protrusion 3431 to move along an arc-shaped trajectory, thereby pushing the latch 343 to slide up and down in the mounting groove 3412, realizing the locking or unlocking of the fixing block 341 and the support rod 330; when the latch 343 moves upward and disengages from the slot 331, the cable clip 340 can slide freely on the support rod 330; after adjusting the position of the cable clip 340 on the support rod 330, the drive disc 344 is rotated in the opposite direction to make the latch 343 move downward and insert into the corresponding slot 331, relocking the position of the cable clip 340.

[0050] In some embodiments, the width of the latch 343 in the direction perpendicular to its sliding direction gradually increases as it approaches the support rod 330. For example, the latch 343 may be an inverted trapezoid or cone shape, and the shape of the slot 331 may be a trapezoid or cone shape that matches the shape of the latch 343, so that when there is a small misalignment between the latch 343 and the slot 331, the inclined surface guides the positions of the latch 343 and the slot 331 to correspond.

[0051] In some embodiments, the cable clip 340 may further include an elastic element 345 disposed between the fixing block 341 and the latch 343, for applying a spring force to the latch 343 in the direction of the support rod 330, so as to maintain a tight contact between the latch 343 and the slot 331 and ensure the stability of the locked state. The elastic element 345 may be a spring or a rubber washer. When a spring is selected as the elastic element 345, positioning protrusions may be provided on the upper surface of the latch 343 and the top inner wall of the mounting groove 3412 to provide an installation position for the spring.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A junction box for use in an energy storage device, the energy storage device comprising an energy storage battery and an inverter, the energy storage battery having a first conductor and the inverter having a second conductor; characterized in that, The junction box includes a box body, which has a wiring chamber, a first mounting surface, and a second mounting surface. The first mounting surface is used to connect the energy storage battery, and the first mounting surface has a first through hole connecting the wiring chamber to the external space, so that the first wire passes through the first through hole and extends into the wiring chamber. The second mounting surface is used to connect the inverter, and the second mounting surface has a second through hole connecting the wiring chamber to the external space, so that the second wire passes through the second through hole and extends into the wiring chamber.

2. The junction box according to claim 1, characterized in that, The energy storage device further includes at least one set of fixing components, the fixing components including a support rod and at least one cable clamp, the support rod being fixedly disposed in the wiring chamber, the cable clamp being slidably connected to the support rod, and the cable clamp being used to fix the first conductor and / or the second conductor.

3. The junction box according to claim 2, characterized in that, The cable clamp includes a fixing block and a cable block; the fixing block has a groove and is slidably fitted onto the support rod through the groove; the cable block is connected to the fixing block and has at least one cable clamping groove for fixing the first wire and / or the second wire.

4. The junction box according to claim 3, characterized in that, The cable clamp also includes a latch and a drive plate; the latch is slidably disposed on the fixing block along a direction perpendicular to the extension of the support rod, and the support rod has multiple slots arranged at intervals along the extension direction of the support rod, the latch being inserted into the slot opposite to the position of the fixing block; the drive plate is rotatably connected to the fixing block, and the drive plate has an arc-shaped eccentric groove on the side facing the support rod, the center line of the eccentric groove being parallel and spaced apart from the rotation axis of the drive plate; the latch has a protrusion on the side facing the drive plate, the protrusion being slidably embedded in the eccentric groove.

5. The junction box according to claim 4, characterized in that, The cable clamp also includes an elastic element disposed between the fixing block and the latch, which is used to apply a spring force to the latch in the direction of the support rod.

6. The junction box according to claim 4, characterized in that, The width of the latch perpendicular to its sliding direction gradually increases as it approaches the support rod.

7. The junction box according to any one of claims 3-6, characterized in that, The cable block is provided with a rotating shaft, the fixing block has a connecting hole, and the rotating shaft is rotatably disposed in the connecting hole.

8. The junction box according to claim 7, characterized in that, The rotating shaft includes a shaft body connected to the cable block and a damping sleeve sleeved on the shaft body.

9. The junction box according to any one of claims 1-6, characterized in that, The junction box also includes a cover, the junction chamber has an opening, the cover is movably connected to the box body and closes the opening.

10. An energy storage device, characterized in that, It includes an energy storage battery, an inverter, and a junction box as described in any one of claims 1-9, wherein the first mounting surface of the junction box is connected to the energy storage battery, and the second mounting surface of the junction box is connected to the inverter.

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