Split type energy storage converter box body structure

Abstract

The utility model discloses a split type energy storage converter box body structure, comprising a host box body and a junction box body which are mutually independent, the host box body and the junction box body are mechanically connected through a connecting piece, and the host box body and the junction box body are electrically connected through a plurality of plug-in connectors. The host box body and the junction box body are in sealed connection through a sealing gasket, and the sealing gasket is arranged around the plurality of plug-in connectors; c-shaped reinforcing ribs are arranged on the sides, connected with each other, of the host box body and the junction box body; and a step mounting surface for compensating the height difference of different plug-in connectors is arranged on the connected side of the host box body and / or the junction box body. According to the utility model, the host box body and the junction box body can be separately mounted and separately dismounted and maintained; a plurality of plug-in connectors are used for plug-in at the same time to realize electrical connection, and the height difference of different connectors is compensated through the step mounting surface.

Description

Technical Field

[0001] The utility model relates to a split type energy storage converter box structure, belonging to the technical field of energy storage converters. Background Art

[0002] In order to facilitate the early installation and later maintenance and replacement, the split design of the host and junction box of the photovoltaic inverter is more popular in North America. The box of the energy storage inverter on the market is usually integrated. Once a fault occurs, all wiring needs to be removed to remove the faulty machine, which increases the difficulty and time of maintenance. Previously, the plug-in connector between the photovoltaic host and the junction box was usually made into one piece, which required custom design and mold manufacturing, and the cost was high. Previously, the sealing and waterproofing between the photovoltaic host and the junction box was achieved by mold opening silicone rubber ring. The hardness of silicone is high, and the compression force is large, which is easy to deform the frame. Previously, the connection between the photovoltaic host and the junction box was tightened with screws after the flange edge was welded by bending the sheet metal. Because the bending and welding process cannot be too complicated, the flange strength is not large, and the connection cannot withstand large external forces. In addition, when different types of plug-in connectors are used between the host and the junction box, a certain height difference will be generated. Summary of the invention

[0003] The technical problem to be solved by the utility model is: how to solve the problem existing in the box of the integrated energy storage inverter, that is, once a fault occurs, all wiring needs to be removed to move the faulty machine; the integrated plug-in connector between the photovoltaic host and the junction box needs to be customized designed and molded, which is very expensive; the sealing and waterproof silicone rubber ring between the photovoltaic host and the junction box has high hardness and high compression force, which can easily deform the machine frame; the connection between the photovoltaic host and the junction box cannot withstand large external forces.

[0004] In order to solve the above technical problems, the technical solution of the utility model is to provide a split energy storage inverter box structure, which is characterized in that it includes a main box and a junction box box that are independent of each other, the main box and the junction box box are mechanically connected by a connecting piece, the main box and the junction box box are also electrically connected by a plurality of plug-in connectors, the main box and the junction box box are also sealed by a sealing gasket, and the sealing gasket is arranged around the plurality of plug-in connectors; C-shaped reinforcing ribs are provided on the side of the main box and the junction box box that are connected to each other; a step mounting surface is provided on the side of the main box and / or the junction box box that is connected to compensate for the height difference of different plug-in connectors.

[0005] Preferably, the side surfaces of the main housing and the junction box that are connected to each other are both mating surfaces, and a plurality of mating connectors are provided on the mating surfaces of the main housing and the junction box, and each mating connector on the main housing and each mating connector on the junction box are matingly connected one by one.

[0006] Preferably, at least two guide sleeves are provided on the mating surface of the main housing, and at least two guide posts are provided on the mating surface of the junction box housing, the number of guide posts and guide sleeves is the same, and the positions of the guide posts and guide sleeves correspond one to one; when the main housing and the junction box housing are mated, each guide post is inserted into the corresponding guide sleeve.

[0007] Preferably, the plug-in connector is a plug or a socket; in the main housing and the junction box housing, the plug-in connector on one is a plug, and the plug-in connector on the other is a socket; each plug and socket is respectively connected to the internal components of the main housing and the junction box housing with cables.

[0008] Preferably, C-shaped reinforcing ribs and folded edge reinforcing ribs are provided on the mating surfaces of the main housing and the junction box housing.

[0009] Preferably, upper tightening handles are fixed on both sides of the main housing near the plug-in surface, and lower tightening handles are fixed on both sides of the junction box housing near the plug-in surface, and each upper tightening handle corresponds to a lower tightening handle; the connecting piece includes an upper tightening handle and a lower tightening handle, and the upper tightening handle and the lower tightening handle are connected by fasteners.

[0010] Preferably, a gap is provided between the main housing and the junction box housing at a position outside the sealing gasket.

[0011] Preferably, a partition is provided on the connection surface between the main housing and the junction box housing, the partition is provided with a partition groove, and a sealing gasket is provided in the partition groove.

[0012] Preferably, the sealing pad is a frame-shaped or annular structure; the sealing pad is a foamed silicone waterproof pad.

[0013] Preferably, the main housing and the junction box housing are both provided with a plug-in mounting plate for mounting a plurality of plug-in connectors, and the plug-in mounting plates of the main housing and / or the junction box housing are provided with a step mounting surface for compensating for the height difference of different plug-in connectors.

[0014] Compared with the prior art, the utility model has at least one of the following advantages:

[0015] 1. The mainframe box and junction box can be installed and disassembled separately for maintenance;

[0016] 2. Use multiple plug-in connectors to plug in simultaneously to achieve electrical connection, and use the stepped mounting surface to compensate for the height difference of different connectors;

[0017] 3. Use foamed silicone to seal the mating surfaces of the mainframe and junction box to reduce compression force and avoid deformation of the mating surfaces;

[0018] 4. Use a tightening handle made of die-cast aluminum alloy, which is assembled on the mainframe box and the junction box by screws to increase the connection strength between the mainframe box and the junction box, and at the same time achieve electrical conduction between the two boxes;

[0019] 5. The inside of the plug-in surface of the box body is provided with C-shaped reinforcing ribs and the plug-in part is provided with folded reinforcing ribs, so as to increase the strength of the plug-in surface, so that the connection between the main box body and the junction box can withstand a large external force, thereby avoiding the deformation of the frame due to the pressure of the intermediate connecting parts (plug-in connector, sealing gasket) when the main box body and the junction box body are tightly connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the disassembly of a split energy storage converter box structure;

[0021] Figure 2 is a schematic diagram of the mainframe case (I);

[0022] Figure 3 is a schematic diagram of the mainframe case (II);

[0023] Figure 4 is a schematic diagram of a junction box body (I);

[0024] Figure 5 It is a schematic diagram of the junction box body (II);

[0025] Figure 6 is a schematic diagram of the mainframe case (III);

[0026] Figure 7 It is a schematic diagram of the junction box body (III);

[0027] Figure 8 is a schematic diagram of a junction box body (IV);

[0028] Fig. 9 It is an overall three-dimensional diagram of a split energy storage converter box structure;

[0029] Fig.10 It is an overall front view of a split energy storage converter box structure;

[0030] Fig.11 for Fig.10 A magnified schematic diagram of the position A in the middle;

[0031] Fig.12 It is a schematic diagram of the connection between the mainframe box and the junction box box;

[0032] Fig.13 This is a schematic diagram of a 12KW household energy storage inverter. DETAILED DESCRIPTION

[0033] In order to make the present invention more obvious and easy to understand, preferred embodiments are described in detail as follows in conjunction with the accompanying drawings.

[0034] The utility model provides a split energy storage converter box structure, which can be used for electrical products such as electrical boxes and energy storage converters, such as Figure 1 As shown, it includes a mainframe box 1 and a junction box 2. The mainframe box 1 and the junction box 2 are mechanically connected to ensure sealing, waterproofing and static load strength. During installation, the mainframe box 1 and the junction box 2 can be installed separately and disassembled for maintenance. At the same time, multiple plug-in connectors 3 are used to achieve electrical connection (i.e., multiple plug-in connectors 3 are provided on the plug-in surfaces of the mainframe box 1 and the junction box 2, and each plug-in connector 3 on the mainframe box 1 and each plug-in connector 3 on the junction box 2 are plug-in connected one by one), which is convenient for early installation and later maintenance.

[0035] like Figure 1 , Figure 9-11 As shown, at least two guide sleeves 5 are provided on the mating surface of the mainframe case 1, and guide posts 4 corresponding to the positions and numbers of the guide sleeves 5 are provided on the mating surface of the junction box case 2. When the mainframe case 1 and the junction box case 2 are mated, each guide post 4 is inserted into the corresponding guide sleeve 5. The mainframe case 1 and the junction box case 2 are preliminarily mated using the guide posts 4 and guide sleeves 5 for guidance. Since the mainframe case 1 and the junction box case 2 are in contact and pressed by the sealing gasket 6, a gap 14 is provided between the mainframe case 1 and the junction box case 2 around the sealing gasket 6, thereby proving that the mainframe case 1 and the junction box case 2 are in close contact with the sealing gasket 6.

[0036] like Figure 2-Figure 5 As shown, there are C-shaped reinforcement ribs 11 and folded reinforcement ribs 10 on the mating surfaces of the mainframe housing 1 and the junction box housing 2, which can reduce the deformation of the mating surfaces. In this embodiment, the C-shaped reinforcement ribs 11 and folded reinforcement ribs 10 are respectively arranged on the inner and outer sides of the corresponding mainframe housing 1 and the corresponding junction box housing 2.

[0037] The plug-in connector 3 is a plug or a socket. Figure 6 , Figure 7 As shown, multiple plugs and sockets are installed on the main box 1 and the junction box 2 respectively, and each plug and socket is connected to the internal components of the main box 1 and the junction box 2 (the internal components are conventional existing structures in the host and junction box of the photovoltaic inverter, so they are not described again) with cables. The main box 1 and / or the junction box 2 are provided with a step mounting surface 12, which is used to compensate for the height difference of different plug-in connectors 3.

[0038] like Figure 1 , Figure 8As shown, the mating surfaces of the mainframe housing 1 and the junction box housing 2 are sealed and connected by a sealing gasket 6, which is a frame-shaped (ring-shaped) structure and is arranged on the outside of the plurality of mating connectors 3. The sealing gasket 6 is made of foamed silicone material, is waterproof, has a single-sided adhesive backing, is adhered to the mating surface of the junction box housing 2, and is positioned using the slots on the partition 9 (i.e., the partition slots 13).

[0039] An upper tightening handle 7 and a lower tightening handle 8 are respectively fastened on both sides of the mainframe housing 1 and the junction box housing 2 near the mating surface, and the upper tightening handle 7 and the lower tightening handle 8 are fastened and connected by screws and or nuts, thereby realizing a fastening connection between the mainframe housing 1 and the junction box housing 2. In this embodiment, an upper tightening handle 7 is respectively fixed on both sides of the mainframe housing 1 near the mating surface, and a lower tightening handle 8 is respectively fixed on both sides of the junction box housing 2 near the mating surface, and each upper tightening handle 7 corresponds to a lower tightening handle 8. Figure 1 , Fig.12 As shown, the handles (i.e., the upper tightening handle 7 and the lower tightening handle 8) are made of die-cast aluminum alloy and are fixed to the sides of the frame (i.e., the mainframe housing 1 and the junction box housing 2) by three screws. By tightening the screws passing through the handles, the sealing gasket 6 between the mainframe housing 1 and the junction box housing 2 can be compressed, and at the same time, the pins and sockets (i.e., the No. 1 plug pin 15 is inserted into the No. 1 socket socket 16, and the No. 2 plug pin 17 is inserted into the No. 2 socket socket 18) are inserted into place, completing the electrical connection and waterproof sealing.

[0040] The utility model has been tested for waterproofness, conduction and static load strength, and all of them can reach the indicators of industry standards.

[0041] like Fig.13 As shown in the figure, a 4-pin and a 34-pin connector are used between the host and the junction box of the 12KW household energy storage inverter to connect the battery, photovoltaic, power grid, load, communication and other circuits. Two guide pillars and guide sleeves are used for guidance, and foamed silicone (6mm thick) is used for waterproof sealing. The host and the junction box are connected by tightening the screws passing through the die-cast handle. After small-scale trial production, the plug-in waterproof test, conduction test, current and temperature rise test, and static load test are all OK.

Claims

1. A split energy storage converter box structure, characterized in that: The invention comprises a mainframe case (1) and a junction box case (2) which are independent of each other, the mainframe case (1) and the junction box case (2) being fastened and connected via a connecting piece, the mainframe case (1) and the junction box case (2) being electrically connected via a plurality of plug-in connectors (3), the mainframe case (1) and the junction box case (2) being sealed and connected via a sealing gasket (6), the sealing gasket (6) being arranged around the plurality of plug-in connectors (3); a C-shaped reinforcing rib (11) is provided on one side of the mainframe case (1) and the junction box case (2) which are connected to each other; and a stepped mounting surface (12) for compensating for the height difference between different plug-in connectors (3) is provided on one side of the mainframe case (1) and / or the junction box case (2) which are connected.

2. A split type energy storage converter box structure as claimed in claim 1, characterized in that: The mutually connected side surfaces of the host case (1) and the junction box case (2) are both mating surfaces, and a plurality of mating connectors (3) are provided on the mating surfaces of the host case (1) and the junction box case (2), and each mating connector (3) on the host case (1) and each mating connector (3) on the junction box case (2) are matingly connected one by one.

3. A split type energy storage converter box structure as claimed in claim 2, characterized in that: At least two guide sleeves (5) are provided on the mating surface of the host case (1), and at least two guide pillars (4) are provided on the mating surface of the junction box case (2). The number of the guide pillars (4) and the guide sleeves (5) is the same, and the positions of the guide pillars (4) and the guide sleeves (5) correspond one to one. When the host case (1) and the junction box case (2) are mated, each guide pillar (4) is inserted into the corresponding guide sleeve (5).

4. A split type energy storage converter box structure as claimed in claim 2, characterized in that: The plug-in connector (3) is a plug or a socket; the plug-in connector (3) on one of the mainframe housing (1) and the junction box housing (2) is a plug, and the plug-in connector (3) on the other is a socket; each plug and socket is respectively connected to the internal components of the mainframe housing (1) and the junction box housing (2) by cables.

5. A split type energy storage converter box structure as claimed in claim 2, characterized in that: The mating surfaces of the mainframe housing (1) and the junction box housing (2) are provided with C-shaped reinforcing ribs (11) and folded edge reinforcing ribs (10).

6. A split type energy storage converter box structure as claimed in claim 2, characterized in that: Upper tightening handles (7) are fixed at positions close to the plug-in surface on both sides of the host case (1), and lower tightening handles (8) are fixed at positions close to the plug-in surface on both sides of the junction box case (2), and each upper tightening handle (7) corresponds to a lower tightening handle (8); the connecting piece includes an upper tightening handle (7) and a lower tightening handle (8), and the upper tightening handle (7) and the lower tightening handle (8) are connected by a fastener.

7. A split type energy storage converter box structure as claimed in claim 1, characterized in that: A gap (14) is provided between the main housing (1) and the junction box housing (2) at a position outside the sealing gasket (6).

8. A split type energy storage converter box structure as claimed in claim 1, characterized in that: A partition plate (9) is provided on the connection surface between the main housing (1) and the junction box housing (2), a partition plate groove (13) is provided on the partition plate (9), and a sealing gasket (6) is arranged in the partition plate groove (13).

9. A split type energy storage converter box structure as claimed in claim 1, characterized in that: The sealing pad (6) is a frame-shaped or annular structure; the sealing pad (6) is a foamed silica gel waterproof pad.

10. A split type energy storage converter box structure as claimed in claim 1, characterized in that: The mainframe housing (1) and the junction box housing (2) are both provided with a plug-in mounting plate (19) for mounting a plurality of plug-in connectors (3); the plug-in mounting plate (19) of the mainframe housing (1) and / or the junction box housing (2) is provided with a stepped mounting surface (12) for compensating for the height difference between different plug-in connectors (3).

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