Energy storage device

Abstract

The present invention provides an energy storage device, comprising an inverter module, a wall-mounted structure, a battery module and a fixing structure; an assembly connection position and a maintenance connection position are sequentially formed on the rear side of the inverter module along the direction from top to bottom; the wall-mounted structure is fixed to a vertical surface and is detachably connected to the assembly connection position or the maintenance connection position; the battery module is located below the inverter module and is vertically butted against the inverter module, and the battery module is also electrically connected to the inverter module through a lead wire; the battery module is fixed to the vertical surface through the fixing structure. The present invention can complete the separate disassembly and removal of the battery module without removing the inverter module from the vertical surface, achieving the effect of battery maintenance without disassembling the machine, and effectively improving the problem of complex battery maintenance operations.

Description

Technical Field

[0001] The present invention belongs to the technical field of power equipment, and particularly relates to an energy storage device. Background Art

[0002] With the development of society, the power supply in power production has evolved from a single power supply to an energy storage power supply. The energy storage power supply technology relies on a system that can store and supply electrical energy. It greatly facilitates the management of electricity users and can give full play to the role of power equipment, thereby reducing the cost of power supply. The core of this system is an energy storage device composed of a battery and an inverter. The battery can store electrical energy, and the inverter serves as a bridge between the battery and electrical equipment. It converts the direct current output by the battery into alternating current, which is an essential part when using the stored electrical energy.

[0003] Since the battery is relatively easy to be damaged, after the existing energy storage device is used for a period of time, it is necessary to disassemble both the battery and the inverter for maintenance. The disassembly and assembly process is cumbersome, resulting in low maintenance operation efficiency and high maintenance costs. Summary of the Invention

[0004] An embodiment of the present invention provides an energy storage device, aiming to solve the problem in the prior art that the energy storage device needs to be disassembled as a whole for battery maintenance, resulting in complex maintenance operations.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] Provide an energy storage device, including:

[0007] An inverter module, on the rear side of which there are sequentially formed an assembly connection position and a maintenance connection position in the direction from top to bottom;

[0008] A wall-mounted structure, fixed to a vertical surface and detachably connected to the assembly connection position or the maintenance connection position;

[0009] A battery module, located below the inverter module and in vertical butt joint with the inverter module, and the battery module is also electrically connected to the inverter module through a lead wire; and

[0010] A fixing structure, through which the battery module is fixed to the vertical surface.

[0011] In a possible implementation manner, define the lead wire of the inverter module as the first lead wire, and define the lead wire of the battery module as the second lead wire;

[0012] The first lead wire is led out from the left side and / or the right side of the inverter module, and the second lead wire is led out from the left side and / or the right side of the battery module. The first lead wire and the second lead wire are conductively connected through a detachable interface structure;

[0013] Alternatively, the first lead wire is led out from the left side and / or the right side of the inverter module, and the first lead wire and the battery module are conductively connected through a detachable interface structure;

[0014] Alternatively, the second lead wire is led out from the left side and / or the right side of the battery module, and the second lead wire and the inverter module are conductively connected through a detachable interface structure.

[0015] In a possible implementation, decorative plates are detachably connected to the left side and / or the right side of the inverter module and the left side and / or the right side of the battery module respectively. The decorative plates can shield the first lead wire, the second lead wire and the interface structure.

[0016] In a possible implementation, heat dissipation holes are formed in the decorative plates.

[0017] In a possible implementation, the wall hanging structure includes:

[0018] A main hanging rack fixed to the vertical surface; and

[0019] A hanging plate provided on the front side of the main hanging rack;

[0020] A plurality of connecting plates extending backward are formed on the rear side of the inverter module. Assembly hanging holes and maintenance hanging holes are formed in the connecting plates and are arranged in sequence from top to bottom. Both the assembly hanging holes and the maintenance hanging holes can be hung and adapted to the hanging plate. The assembly hanging holes form the assembly connection positions, and the maintenance hanging holes form the maintenance connection positions.

[0021] In a possible implementation, limiting plates extending forward are respectively formed on the left side and the right side of the main hanging rack. A limiting space for simultaneously accommodating a plurality of the connecting plates is formed between the two oppositely arranged limiting plates.

[0022] In a possible implementation, the limiting plate and the adjacent connecting plate are locked by fasteners.

[0023] In a possible implementation, the wall hanging structure further includes an auxiliary limiting rack. The auxiliary limiting rack is located below the main hanging rack and can be fixed to the vertical surface. The auxiliary limiting rack abuts against the rear side surface of the inverter module to limit the backward swing of the inverter module.

[0024] In a possible implementation, a reinforcing rib is formed at the rear of the connecting plate, and both the assembly connection position and the maintenance connection position are located on the reinforcing rib.

[0025] In a possible implementation, the energy storage device further includes an auxiliary docking structure. The auxiliary docking structure includes a positioning protrusion provided on one of the inverter module and the battery module, and further includes a positioning groove formed on the other of the inverter module and the battery module. The positioning protrusion is in plug-in fit with the positioning groove up and down.

[0026] Compared with the prior art, the solution shown in the embodiments of the present application utilizes the characteristic that the inverter module is relatively light in weight, and places the inverter module above the battery module. When the wall-mounted structure is connected to the assembly connection position, the inverter module is in a state of being normally docked and assembled with the battery module; if battery maintenance is required, the inverter module is moved to separate the wall-mounted structure from the assembly connection position and connect it to the maintenance connection position. At this time, the inverter module and the battery module are disengaged from the up-and-down docking state and move upward a certain distance relative to the battery module, forming a maintenance space between the inverter module and the battery module. The battery module can be separately disassembled and taken out without removing the inverter module from the vertical surface, achieving the effect of battery maintenance without disassembling the machine, and effectively improving the problem of complex battery maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the state of the energy storage device provided by the embodiment of the present invention Figure 1 , in which the inverter module is in a state of being docked up and down with the battery module;

[0028] Figure 2 is Figure 1 the rear perspective view of

[0029] Figure 3 is Figure 2 the assembly schematic diagram of the radiator and the wall-mounted structure in

[0030] Figure 4 is the perspective view of the wall-mounted structure adopted by the embodiment of the present invention;

[0031] Figure 5 is the distribution diagram of the assembly hanging opening, the maintenance hanging opening and the first fixing hole adopted by the embodiment of the present invention;

[0032] Figure 6 is the state of the energy storage device provided by the embodiment of the present invention Figure 2 , in which the inverter module is in a state of being separated from the battery module up and down;

[0033] Figure 7 is Figure 6 another perspective view of the energy storage device in

[0034] Figure 8 is Figure 6 the rear three-dimensional view of

[0035] Explanation of the reference numerals in the drawings:

[0036] 100, inverter module; 10a, assembly connection position; 10b, maintenance connection position; 110, connection plate; 111, second fixing hole; 112, reinforcing rib; 120, assembly hanging port; 130, maintenance hanging port; 140, inverter; 150, radiator;

[0037] 200, wall-mounted structure; 210, main hanger; 211, limiting plate; 212, first fixing hole; 213, limiting flange; 220, hanging plate; 230, auxiliary limiting frame;

[0038] 300, battery module; 310, battery;

[0039] 400, fixing structure;

[0040] 500, decorative plate; 510, wire-passing opening; 520, heat dissipation hole;

[0041] 600, auxiliary docking structure; 610, positioning protrusion; 620, positioning groove. Detailed implementation manners

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] In the claims, the description and the above drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are all used to distinguish different objects and are not used to describe a specific order.

[0044] In the claims, the description and the above drawings of the present invention, the term "front" refers to the direction away from the vertical surface, and vice versa is "rear". Unless otherwise clearly defined for the remaining orientation terms, when using terms such as "upper", "lower", "top", "bottom", "height", "low", "left", "right", "center", "horizontal", "vertical", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0045] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, it includes non-detachable fixed connection, detachable fixed connection, being integrally connected, and being fixedly connected through other devices or components.

[0046] In the claims, the description and the above-mentioned drawings of the present invention, when using the terms "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0047] Please refer to Figures 1 to 8 for an illustration of the energy storage device provided by the present invention. The energy storage device includes an inverter module 100, a wall-mounted structure 200, a battery module 300, and a fixing structure 400; an assembly connection position 10a and a maintenance connection position 10b are sequentially formed on the rear side of the inverter module 100 in the direction from top to bottom; the wall-mounted structure 200 is fixed to a vertical surface and is detachably connected to the assembly connection position 10a or the maintenance connection position 10b; the battery module 300 is located below the inverter module 100 and is vertically butted against the inverter module 100, and the battery module 300 is also electrically connected to the inverter module 100 through lead wires; the battery module 300 is fixed to the vertical surface through the fixing structure 400.

[0048] The vertical surface in this embodiment can be a vertical surface such as a wall surface of a wall or a side wall surface of a cabinet. The vertical surface can be a flat surface or a curved surface, as long as the wall-mounted structure 200 and the fixing structure 400 can adapt to the shape of the vertical surface and achieve assembly, and there is no unique limitation here.

[0049] The battery module 300 in this embodiment includes a plurality of batteries 310 distributed in a certain manner, and a fixing structure 400 is correspondingly connected to each battery 310. In this embodiment, an exemplary illustration shows that the plurality of batteries 310 are arranged in a stacked manner from top to bottom, and the fixing structures 400 are provided on both the left and right sides of each battery 310.

[0050] The fixing structure 400 in this embodiment realizes the relative fixation of the battery module 300 to the vertical surface and can also be detached from the vertical surface or the battery module 300 to meet the needs of disassembly and maintenance of the battery module 300. In this embodiment, the fixing structure 400 is exemplarily shown as a structure having mounting holes, and the detachable connection with the vertical surface can be realized through threaded connectors (such as screws).

[0051] In this embodiment, the number of the assembly connection positions 10a and the number of the maintenance connection positions 10b are not uniquely limited, as long as the requirements of assembly and maintenance can be met.

[0052] Compared with the prior art, the energy storage device provided in this embodiment utilizes the feature that the inverter module 100 is relatively light in weight, and places the inverter module 100 above the battery module 300. When the wall-mounted structure 200 is connected to the assembly connection position 10a, the inverter module 100 is in a state of normal docking and assembly with the battery module 200. If battery maintenance is required, the inverter module 100 is moved to separate the wall-mounted structure 200 from the assembly connection position 10a and connect it to the maintenance connection position 10b. At this time, the inverter module 199 is disengaged from the upper and lower docking state with the battery module 300 and moves upward a certain distance relative to the battery module 300. A maintenance space is formed between the inverter module 100 and the battery module 300, and the battery module 300 can be separately disassembled and taken out without removing the inverter module 100 from the vertical surface, achieving the effect of battery maintenance without disassembly of the machine, and effectively improving the problem of complex battery maintenance operations.

[0053] In some embodiments, the lead wire of the inverter module 100 is defined as the first lead wire, and the lead wire of the battery module 300 is defined as the second lead wire. There are several wiring methods between the inverter module 100 and the battery module 300 as follows:

[0054] 1) The first lead wire is led out from the left side and / or the right side of the inverter module 100, and the second lead wire is led out from the left side and / or the right side of the battery module 300. The first lead wire and the second lead wire are conductively connected through a detachable interface structure. Among them, the input end of the inverter module 100 has two first lead wires, and the second lead wire has two respectively connected to the positive and negative poles of the battery module 300. The two second lead wires are respectively connected to the corresponding first lead wires through the interface structure.

[0055] 2) The first lead wire is led out from the left side and / or the right side of the inverter module 100, and the first lead wire and the battery module 300 are conductively connected through a detachable interface structure.

[0056] 3) The second lead wire is led out from the left side and / or the right side of the battery module 300, and the second lead wire and the inverter module 100 are conductively connected through a detachable interface structure.

[0057] In this embodiment, the conductive connection between the inverter module 100 and the battery module 300 is realized through the interface structure, which can achieve quick plugging and unplugging, facilitating the relatively fast disconnection of the conductive connection between the battery module 300 and the inverter module 100 before completely removing the battery module 300, and is beneficial to improving the maintenance efficiency. The interface structure in this embodiment can be obtained through commercial purchase. For example, for the case where the first lead wire and the second lead wire both exist, the male head of the H4 UTX DC terminal connector is connected to one of the first lead wire and the second lead wire, and the female head is provided on the other of the first lead wire and the second lead wire. Specifically in implementation, for the convenience of wire management, the inverter module 100 and the battery module 300 are conductively connected on the same side.

[0058] It should be noted here that in addition to the first lead wire, the inverter module 100 is also provided with connection wires to modules such as photovoltaic plates and loads. The connection wires need to be reserved with sufficient length to avoid the problem that the conductive connection path to modules such as photovoltaic plates and loads is damaged due to the pulling of the connection wires during the process of the inverter module 100 switching and moving between the assembled state and the maintenance state. Similarly, the first lead wire also needs to be reserved with sufficient length to avoid the pulling of the first lead wire during the process of the inverter module 100 switching and moving between the assembled state and the maintenance state, and to avoid damage to the first lead wire, the second lead wire, and the interface structure due to pulling.

[0059] In some embodiments, decorative plates 500 are respectively detachably connected to the left side and / or the right side of the inverter module 100 and the left side and / or the right side of the battery module 300. The decorative plates 500 can shield the first lead wire, the second lead wire, and the interface structure, as Figure 1 、 Figure 2 、 Figures 6 to 8 shown. By shielding the first lead wire, the second lead wire, and the interface structure, it can not only avoid the messy visual feeling brought by the lead wires, but also play a protective role for the lead wires and the interface structure, avoiding damage to the key wiring structure due to knocking and bumping, and ensuring the reliability of use.

[0060] On the basis of the above embodiments, for the convenience of installation, and at the same time to form an avoidance space for electrical components such as lead wire joints on the left and right sides of the inverter module 100 and the battery module 300, the decorative plate 500 is in the shape of a cover body. Based on this implementation manner, wire passing openings 510 are respectively opened on the lower side of the decorative plate 500 provided on the inverter module 100 and the upper side of the decorative plate 500 provided on the battery module 300, as Figures 6 to 8As shown. Taking the case where the first lead wire and the second lead wire exist simultaneously as an example, in the assembled state, the interface structure can be located within the decorative plate 500 provided on the inverter module 100. After the maintenance connection position 10b of the inverter module 100 is connected to the wall-mounted structure 200, the interface structure passes downward through the wire-passing opening 510 opened on the decorative plate 500 under the action of gravity, and then the interface structure is exposed in the maintenance state, facilitating the separation of the male and female connectors of the interface structure. If only one of the first lead wire and the second lead wire can exist, in the assembled state, the docking position of the plugging area of the interface structure with the upper and lower wire-passing openings 510 is roughly aligned. After the inverter module 100 is moved upward, the plugging area of the interface structure is directly exposed outside the decorative plate.

[0061] In some embodiments, the above-mentioned decorative plate 500 can adopt a structure such as Figure 1 , Figure 2 , Figures 6 to 8 shown. Refer to Figure 1 , Figure 2 , Figures 6 to 8 . The decorative plate 500 is provided with heat dissipation holes 520 to maintain the reliability of heat dissipation on the side of the inverter module 100 and the battery module 300. The specific distribution mode of the heat dissipation holes 520 is set according to the actual heat dissipation requirements. The decorative plate 500 is provided with heat dissipation holes 520 at least on its main board surface (i.e., the side board surface of the decorative plate 500 away from the inverter module 100 or the battery module 300); if the inverter module 100 or the battery module 300 generates relatively serious heat, heat dissipation holes 520 can also be opened on the front side board surface and / or the rear side board surface of the decorative plate 500 in the form of a cover body to enhance the air circulation volume. The heat dissipation holes 520 can adopt hole shapes such as round holes, long strip holes, and polygonal holes, and the distribution mode can adopt ways such as rectangular array, linear array, circular array, and irregular distribution, which are not uniquely limited here.

[0062] In some embodiments, the above-mentioned wall-mounted structure 200 can adopt a structure such as Figures 2 to 4 and Figure 8 shown. Refer to the figure to Figure 4 and Figure 8, To achieve the hanging connection between the wall-mounted structure 200 and the inverter module 100, the wall-mounted structure 200 includes a main hanger 210 and a hanging plate 220; the main hanger 210 is fixed to the vertical surface, and the hanging plate 220 is arranged on the front side of the main hanger 210. Correspondingly, a plurality of connecting plates 110 extending backward are formed on the rear side of the inverter module 100. Assembly hanging openings 120 and maintenance hanging openings 130 are sequentially distributed from top to bottom on the connecting plates 110. Both the assembly hanging openings 120 and the maintenance hanging openings 130 can be hung and adapted to the hanging plate 220. The assembly hanging openings 120 form an assembly connection position 10a, and the maintenance hanging openings 130 form a maintenance connection position 10b. It should be noted that, to ensure the reliability of the hanging connection of the inverter module 100, the connecting plates 110 need to be symmetrically distributed on both sides of the inverter module 100 to keep the force evenly distributed after hanging. This embodiment exemplarily shows two hanging plates 220, and the hanging plates 220 are arranged on the left and right sides of the upper part of the main hanger 210. A clearance space can be formed between the two hanging plates 220 to avoid interference with the inverter module 100, and at the same time, the overall thickness of the wall-mounted structure 200 can be reduced in the front-rear direction, making the overall compactness of the wall-mounted structure 200 stronger. In this embodiment, the main hanger 210 is provided with mounting holes, and the main hanger 210 can be fixed to the vertical surface through threaded connectors such as bolts.

[0063] Based on the above wall-mounted structure 200, in order to enhance the strength of the hanging position of the connecting plate 110 and avoid deformation of the connecting plate 110 after long-term hanging, a reinforcing rib 112 is formed at the rear of the connecting plate 110. Both the assembly connection position 10a and the maintenance connection position 10b are located on the reinforcing rib 112.

[0064] Based on the above wall-mounted structure 200, limiting plates 211 extending forward are respectively formed on the left and right sides of the main hanger 210. A limiting space for accommodating a plurality of connecting plates 110 is formed between the two oppositely arranged limiting plates 211, as Figure 4 shown. By accommodating a plurality of connecting plates 110 at the same time, the limiting space can limit the inverter module 100 on both the left and right sides to prevent the inverter module 100 from shaking left and right after hanging; furthermore, a horn-shaped guiding space can be formed at the opening of the limiting space to make it easier for the connecting plates 110 to be introduced into the limiting space.

[0065] Based on the provision of the limiting plates 211, the limiting plates 211 and the adjacent connecting plates 110 are locked by fasteners to completely fix the inverter module 100. In this embodiment, a vertically arranged and waist-shaped first fixing hole 212 is exemplarily opened on the limiting plate 211, and a plurality of second fixing holes 111 are opened on the connecting plate 110 and are distributed up and down. The first fixing hole 212 corresponds to one of the second fixing holes 111 and the position is locked through fasteners (threaded connectors such as bolts or pin connectors such as fixing pins).

[0066] In some embodiments, the upper and lower edges of the main hanger 210 further extend forward respectively to form limiting flanges 213. The limiting flanges 213 are in contact with the rear side surface of the inverter module 100, preventing the lower part of the inverter module 100 from swinging backward after being hooked and maintaining the stability of the hooking.

[0067] In some embodiments, in order to further prevent the inverter module 100 from shaking and make the hooked inverter module 100 more stable, the wall-mounted structure 200 further includes an auxiliary limiting frame 230. The auxiliary limiting frame 230 is located below the main hanger 210 and can be fixed to the vertical surface. The auxiliary limiting frame 230 abuts against the rear side surface of the inverter module 100 to limit the backward swing of the inverter module 100.

[0068] In specific implementation, the inverter module 100 includes an inverter 140 and a radiator 150. The radiator 150 is arranged at the rear side of the inverter 140. The fins of the radiator 140 form a connecting plate 110, as Figure 2 、 Figure 3 、 Figure 5 and Figure 8 shown.

[0069] Alternatively, the inverter module 100 includes an inverter 140, a radiator 150 and connecting plates 110 located on the left and right sides of the radiator 150. The connecting plates 110 are independently arranged from the radiator 150 and are not shown in the figure.

[0070] In some embodiments, the energy storage device further includes an auxiliary docking structure 600. The auxiliary docking structure 600 includes a positioning protrusion 610 provided on one of the inverter module 100 and the battery module 300, and further includes a positioning groove 620 opened on the other of the inverter module 100 and the battery module 300. The positioning protrusion 610 and the positioning groove 620 are inserted and matched up and down. During the process of the inverter module 100 moving down to be docked with the battery module 300, the positioning protrusion 610 and the positioning groove 620 play a role in auxiliary guiding and positioning, ensuring that the inverter module 100 can be vertically aligned with the battery module 300, and also enabling the assembly hanging opening 120 on the inverter module 100 to accurately hook onto the wall-mounted structure 200. In order to facilitate the alignment of the positioning protrusion 610 with the positioning groove 620, the positioning protrusion 610 is a cone, and the positioning groove 620 is correspondingly set as a tapered groove.

[0071] In this embodiment, the positioning groove 620 is exemplarily opened on the lower surface of the inverter 140, while the positioning protrusion 610 is located on the upper surface of the battery module 300. At the same time, the positioning grooves 620 are diagonally arranged on the lower surface of the inverter 140, and the positioning protrusions 610 are also diagonally arranged on the upper surface of the battery module 300, playing an anti-misoperation role. It should be understood that the distribution manners of the positioning groove 620 and the positioning protrusion 610 are not limited to the above-exemplified manners, as long as the positioning requirements can be met.

[0072] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An energy storage device, characterized in that, it includes: an inverter module, on the rear side of which an assembly connection position and a maintenance connection position are sequentially formed in the direction from top to bottom; a wall-mounted structure, fixed to a vertical surface and detachably connected to the assembly connection position or the maintenance connection position; a battery module, located below the inverter module and docked with the inverter module up and down, and the battery module is also electrically connected to the inverter module through a lead wire; and a fixing structure, the battery module is fixed to the vertical surface through the fixing structure; when the wall-mounted structure is connected to the assembly connection position, the inverter module and the battery module are docked and assembled to form an integral body; when the wall-mounted structure is connected to the maintenance connection position, a maintenance space is formed at an interval between the inverter module and the battery module.

2. The energy storage device according to claim 1, characterized in that, defining the lead wire of the inverter module as the first lead wire and the lead wire of the battery module as the second lead wire; the first lead wire is led out from the left side and / or the right side of the inverter module, the second lead wire is led out from the left side and / or the right side of the battery module, and the first lead wire and the second lead wire are electrically connected through a detachable interface structure; or, the first lead wire is led out from the left side and / or the right side of the inverter module, and the first lead wire and the battery module are electrically connected through a detachable interface structure; or, the second lead wire is led out from the left side and / or the right side of the battery module, and the second lead wire and the inverter module are electrically connected through a detachable interface structure.

3. The energy storage device according to claim 2, characterized in that, decorative plates are respectively detachably connected to the left side and / or the right side of the inverter module and the left side and / or the right side of the battery module, and the decorative plates can shield the first lead wire, the second lead wire and the interface structure.

4. The energy storage device according to claim 3, characterized in that, heat dissipation holes are formed in the decorative plates.

5. The energy storage device according to claim 1, characterized in that, the wall-mounted structure includes: a main hanger, fixed to the vertical surface; and a hanging plate, arranged on the front side of the main hanger; a plurality of connecting plates extending backward are formed on the rear side of the inverter module, the plurality of connecting plates are distributed in the left-right direction, and assembly hanging holes and maintenance hanging holes are sequentially formed on the connecting plates from top to bottom, and both the assembly hanging holes and the maintenance hanging holes can be hung and adapted to the hanging plate, the assembly hanging holes form the assembly connection position, and the maintenance hanging holes form the maintenance connection position.

6. The energy storage device according to claim 5, characterized in that, limiting plates extending forward are respectively formed on the left side and the right side of the main hanger, and a limiting space for simultaneously accommodating a plurality of the connecting plates is formed between the two oppositely arranged limiting plates.

7. The energy storage device according to claim 6, characterized in that, the limiting plate and the adjacent connecting plate are locked through a fastener.

8. The energy storage device according to claim 5, characterized in that, The wall-mounted structure further includes an auxiliary limiting frame, which is located below the main hanging frame and can be fixed to the vertical surface. The auxiliary limiting frame restricts the backward swing of the inverter module by abutting against the rear side surface of the inverter module.

9. The energy storage device according to claim 5, wherein, a reinforcing rib is formed at the rear part of the connecting plate, and both the assembly connection position and the maintenance connection position are located on the reinforcing rib.

10. The energy storage device according to claim 1, wherein, the energy storage device further includes an auxiliary docking structure, which includes a positioning protrusion provided on one of the inverter module and the battery module, and further includes a positioning groove formed in the other of the inverter module and the battery module. The positioning protrusion is inserted and matched with the positioning groove up and down.

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