CN220475726U

CN220475726U - Energy storage device

Info

Publication number: CN220475726U
Application number: CN202321866522.0U
Authority: CN
Inventors: 李美娜; 于海洋; 葛叶明
Original assignee: Sungrow Shanghai Co Ltd
Current assignee: Sungrow Shanghai Co Ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-09
Anticipated expiration: 2033-07-14

Abstract

The utility model provides an energy storage device. The energy storage device includes: an inverter; an energy storage module; and the switch box comprises a first installation part, a second installation part and a third installation part which are sequentially arranged along the length direction of the switch box, wherein the first installation part is provided with a first wiring cavity, the second installation part is provided with a middle cavity, the third installation part is provided with a second wiring cavity, a first terminal structure is arranged in the first wiring cavity, a second terminal structure is arranged in the second wiring cavity, the middle cavity is used for installing a circuit board, the circuit board is electrically connected with the first terminal structure through a first electric connection structure, and the circuit board is electrically connected with the second terminal structure through a second electric connection structure. The energy storage equipment of the technical scheme can solve the problems that the junction box in the existing energy storage power supply is only provided with one cavity, all connecting wires and related electronic components are arranged in the cavity, and wiring is inconvenient due to disordered lines.

Description

Energy storage device

Technical Field

The utility model relates to the technical field of energy storage equipment, in particular to energy storage equipment.

Background

The household energy storage battery system absorbs sunlight through the roof solar module, and the generated direct current is converted into alternating current through the inverter and stored in the energy storage unit for household appliances. At present, most of stacked energy storage power supplies in the market are composed of an inverter, a junction box and a plurality of battery modules. In the prior art, the junction box is not independently arranged, the junction box and the inverter are integrated together or the junction box and the battery module are integrated together, the junction box is generally provided with only one cavity, all connecting wires and related electronic components are arranged in the cavity, connecting wires between the storage battery and the switch, connecting wires between the switch and the inverter, connecting wires of output terminals of the inverter and other ports of the switch are all positioned in the same cavity, and the circuit is disordered and inconvenient to uniformly wire.

Disclosure of Invention

The utility model mainly aims to provide energy storage equipment, which can solve the problems that a junction box in the existing energy storage power supply is only provided with a cavity, all connecting wires and related electronic components are arranged in the cavity, and wiring is inconvenient due to confusion of circuits.

To achieve the above object, according to an aspect of the present utility model, there is provided an energy storage device comprising: an inverter; the energy storage module comprises at least one battery module; and the switch box is arranged between the inverter and the energy storage module, the switch box comprises a first installation part, a second installation part and a third installation part which are sequentially arranged along the length direction of the switch box, the first installation part is provided with a first wiring cavity, the second installation part is provided with a middle cavity, the third installation part is provided with a second wiring cavity, the first wiring cavity, the middle cavity and the second wiring cavity are mutually independent, a first terminal structure is arranged in the first wiring cavity, a second terminal structure is arranged in the second wiring cavity, the middle cavity is configured to be used for installing a circuit board, the circuit board is electrically connected with the first terminal structure through a first electric connection structure, and the circuit board is electrically connected with the second terminal structure through a second electric connection structure.

Further, the energy storage module, the switch box and the inverter are sequentially overlapped from bottom to top, the top of the switch box is in plug-in fit with the inverter, and the bottom of the switch box is in plug-in fit with the energy storage module.

Further, a first installation opening communicated with the first wiring cavity is formed in the side wall of one side, far away from the second installation portion, of the first installation portion, a second installation opening communicated with the second wiring cavity is formed in the side wall of one side, far away from the second installation portion, of the third installation portion, and a first sealing cover plate is arranged on each of the first installation opening and the second installation opening.

Further, the inner peripheral surfaces of the first mounting opening and the second mounting opening are respectively provided with a sealing clamping groove, and the first sealing cover plate is provided with a sealing structure which can be in sealing fit with the sealing clamping grooves.

Further, the first terminal structure is arranged on the inner wall of the first mounting part, which is close to the second mounting part, and comprises a direct current terminal row, a communication terminal and an antenna hole, the first mounting opening is arranged towards the direct current terminal row, the communication terminal and the antenna hole, orthographic projection is carried out on the mounting surface of the direct current terminal row, and the direct current terminal row, the communication terminal and the antenna hole are positioned in the projection surface of the first mounting opening; and/or the second terminal structure is arranged on the inner wall of the third mounting part, which is close to the second mounting part, and the second terminal structure comprises an alternating current terminal row, and when the projection is carried out on the mounting surface of the alternating current terminal row, the projection of the alternating current terminal row is positioned in a projection area surrounded by the projection of the outer contour of the second mounting opening.

Further, a first wiring hole is formed in the side wall of one side, far away from the second mounting part, of the first mounting part, a second wiring hole is formed in the side wall of one side, far away from the second mounting part, of the third mounting part, a first avoidance area is formed in the side wall where the first mounting opening is located, a second avoidance area is formed in the side wall where the second mounting opening is located, the first wiring hole is located in the first avoidance area, the second wiring hole is located in the second avoidance area, and/or second sealing cover plates are arranged on the first wiring hole and the second wiring hole.

Further, a third wiring hole is formed in the side face of the first installation portion and/or a fourth wiring hole is formed in the side face of the third installation portion.

Further, the top of second installation department is provided with the third installation opening, and third installation opening upper cover is equipped with the third and seals the apron, is provided with third electric connection structure on the third and seals the apron, and the switch box passes through third electric connection structure and the cooperation of pegging graft of dc-to-ac converter.

Further, the quantity of battery module is a plurality of, and a plurality of battery modules overlap in proper order from bottom to top, and the upper end of the battery module that is located the top is provided with fourth electric connection structure, and the bottom of switch box is provided with the fifth electric connection structure that can with fourth electric connection structure looks adaptation.

Further, the upper end of the battery module at the top is provided with a handle, and the bottom of the switch box is provided with a groove which can be matched with the handle.

By applying the technical scheme, the photovoltaic power generation device is provided with the switch box, the energy storage module and the inverter, the switch box is provided with the first wiring cavity, the second wiring cavity and the third wiring cavity, the first wiring cavity, the second wiring cavity and the third wiring cavity are mutually independent, the first wiring cavity and the second wiring cavity can provide accommodating spaces for the connecting wires, the first terminal structure and the second terminal structure, meanwhile, the connecting wires in the first wiring cavity can be used for being connected with the photovoltaic power generation device, the connecting wires in the second wiring cavity can be used for being connected with an electric load, and the middle cavity is used for installing a battery and a circuit board. Because the effect of first wiring chamber, second wiring chamber and middle chamber three is different and mutually independent sets up, consequently, connecting wire also is located different cavitys respectively according to its effect, makes things convenient for the staff to carry out the wiring.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic perspective view of an energy storage device according to an embodiment of the present utility model;

fig. 2 is a schematic view showing a part of the structure of a switch box of the energy storage device according to the embodiment of the present utility model;

fig. 3 is a schematic view showing the structure of a battery module of the energy storage module according to the embodiment of the present utility model;

FIG. 4 shows a schematic diagram of another angle of a switch box of an energy storage device according to an embodiment of the present utility model;

fig. 5 is a schematic view showing a structure of a first mounting portion of a switch box of an energy storage device according to an embodiment of the present utility model with a first sealing cover plate removed;

fig. 6 is a schematic view showing a structure of a third mounting portion of a switch box of an energy storage device according to an embodiment of the present utility model, with a first sealing cover plate removed; and

fig. 7 shows a schematic structural diagram of an energy storage device according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. an inverter; 20. an energy storage module; 21. a battery module; 211. a fourth electrical connection structure; 30. a switch box; 31. a first mounting portion; 311. a first mounting opening; 312. sealing the clamping groove; 313. a second mounting opening; 32. a second mounting portion; 33. a third mounting portion; 40. a first sealing cover plate; 50. a second sealing cover plate; 60. a third sealing cover plate; 70. a first wiring hole; 71. a second wiring hole; 80. a third wiring hole; 90. a fourth wiring hole; 91. a DC terminal block; 92. a communication terminal; 93. an antenna aperture; 94. an alternating current terminal block; 95. a handle; 96. and a wiring pipeline.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 7 in combination, the present utility model provides an energy storage device including an inverter 10; an energy storage module 20 including at least one battery module 21; and a switch box 30, the switch box 30 being disposed between the inverter 10 and the energy storage module 20, the switch box 30 including a first mounting portion 31, a second mounting portion 32 and a third mounting portion 33 arranged in sequence along a length direction thereof, the first mounting portion 31 having a first wiring cavity, the second mounting portion 32 having an intermediate cavity, the third mounting portion 33 having a second wiring cavity, the first wiring cavity, the intermediate cavity and the second wiring cavity being disposed independently of each other, a first terminal structure being disposed in the first wiring cavity, a second terminal structure being disposed in the second wiring cavity, the intermediate cavity being configured to mount a circuit board, the circuit board being electrically connected with the first terminal structure through the first electrical connection structure, the circuit board being electrically connected with the second terminal structure through the second electrical connection structure.

In the present embodiment, the switch box 30 is disposed between the inverter 10 and the energy storage module 20, and the inverter 10 is electrically connected to the energy storage module 20 through the switch box 30. The first wiring cavity, the second wiring cavity and the third wiring cavity are mutually independent, the first wiring cavity and the second wiring cavity can provide accommodation space for the connecting wires, the first terminal structure and the second terminal structure, meanwhile, the connecting wires in the first wiring cavity can be used for being connected with a photovoltaic power generation device, the connecting wires in the second wiring cavity can be used for being connected with an electric load, the middle cavity is used for installing a battery and a circuit board, the circuit board is electrically connected with the first terminal structure through a first electric connection structure, and the circuit board is electrically connected with the second terminal structure through a second electric connection structure. Because the effect of first wiring chamber, second wiring chamber and middle chamber three is different and mutually independent sets up, consequently, connecting wire also is located different cavitys respectively according to its effect, makes things convenient for the staff to carry out the wiring. The energy storage device is connected with the photovoltaic power generation device and also needs to be connected with the electric load to supply power to the electric load, at the moment, the lead in the first wiring cavity can be directly led out to be connected with the photovoltaic power generation device, the lead in the second wiring cavity is led out to be connected with the electric load, and then the inverter 10 is enabled to adjust the current output by the energy storage module 20, and after the direct current is converted into alternating current, the alternating current is transmitted to the electric load to continuously supply power.

It should be noted that the first electrical connection structure and the second electrical connection structure include connection wires and other related electronic components (not shown in the figure).

In one embodiment of the present utility model, the energy storage module 20, the switch box 30 and the inverter 10 are stacked in sequence from bottom to top, the top of the switch box 30 is in plug-in fit with the inverter 10, and the bottom of the switch box 30 is in plug-in fit with the energy storage module 20.

In this embodiment, the top of the switch box 30 is in plug-in fit with the bottom of the inverter 10, so as to realize electrical connection between the switch box 30 and the inverter 10, and the bottom of the switch box 30 is in plug-in fit with the top of the energy storage module 20, so as to realize electrical connection between the switch box 30 and the energy storage module 20, i.e. the inverter 10 is electrically connected with the energy storage module 20 through the switch box 30. Because the switch box 30 and the inverter 10 and the switch box 30 and the energy storage module 20 are in plug-in fit through connectors, the inverter 10 and the energy storage module 20 do not need to be additionally provided with structures for lead wires to penetrate or pass through, the structure is simpler, the processing and the manufacturing are convenient, and the inverter 10 or the energy storage module 20 can be directly plugged and pulled when being installed and detached, so that the installation and the disassembly are simpler and more convenient.

As shown in fig. 1 to 7 in combination, in one embodiment of the present utility model, a first mounting opening 311 communicating with the first wiring cavity is provided on a side wall of the first mounting portion 31 on a side remote from the second mounting portion 32, a second mounting opening 313 communicating with the second wiring cavity is provided on a side wall of the third mounting portion 33 on a side remote from the second mounting portion 32, and a first sealing cover plate 40 is provided on each of the first mounting opening 311 and the second mounting opening 313.

In this embodiment, the first mounting opening 311 is disposed opposite to the mounting surface of the first terminal structure, the second mounting opening 313 is disposed opposite to the mounting surface of the second terminal structure, and the worker can mount the first terminal structure to the inner wall of the first wiring cavity through the first mounting opening 311 and the second terminal structure to the inner wall of the second wiring cavity through the second mounting opening 313. In addition, the first installation opening 311 and the second installation opening 313 are both covered with a first sealing cover plate 40, and the first sealing cover plate 40 can seal the first installation opening 311 and the second installation opening 313, so that water is prevented from entering the first wiring cavity and the second wiring cavity, and the service life of the switch box 30 is prevented from being influenced.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the inner circumferential surfaces of the first mounting opening 311 and the second mounting opening 313 are each provided with a sealing catching groove 312, and the first sealing cover 40 is provided with a sealing structure capable of forming a sealing fit with the sealing catching groove 312.

In this embodiment, the inner peripheral surfaces of the first mounting opening 311 and the second mounting opening 313 are provided with a sealing slot 312, the first sealing cover 40 is provided with a sealing structure, when the first sealing cover 40 is covered on the first mounting opening 311, the sealing structure can be clamped in the sealing slot 312, and when the first sealing cover 40 is covered on the second mounting opening 313, the sealing structure can be clamped in the sealing slot 312. By the above arrangement, the sealing effect of the first sealing cover plate 40 to the first mounting opening 311 and the second mounting opening 313 can be improved, and water inflow in the first wiring chamber and the second wiring chamber can be prevented.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, a first terminal structure is disposed on an inner wall of the first mounting portion 31 near the second mounting portion 32, the first terminal structure includes a dc terminal row 91, a communication terminal 92, and an antenna hole 93, a first mounting opening 311 is disposed toward the dc terminal row 91, the communication terminal 92, and the antenna hole 93, orthographic projection is performed on a mounting surface of the dc terminal row 91, and the dc terminal row 91, the communication terminal 92, and the antenna hole 93 are located in a projection plane of the first mounting opening 311; the second terminal structure is disposed on the inner wall of the third mounting portion 33 near the second mounting portion 32, and the second terminal structure includes an ac terminal strip 94, and when the projection is performed on the mounting surface of the ac terminal strip 94, the projection of the ac terminal strip 94 is located in a projection area surrounded by the projection of the outer contour of the second mounting opening 313.

In this embodiment, the first mounting opening 311 is disposed opposite to the first terminal structure, and a worker can extend into the first wiring cavity through the first mounting opening 311, mount the dc terminal block 91, the communication terminal 92, and the antenna hole 93 on the inner wall of the first mounting portion 31, and extend into the second wiring cavity through the second mounting opening 313, and mount the ac terminal block 94 on the inner wall of the third mounting portion 33. After the installation is completed, the first sealing cover 40 may be provided over the first and second installation openings 311 and 313 to seal the first and second installation openings 311 and 313. In addition, the first mounting opening 311 and the second mounting opening 313 are further convenient for a worker to replace and repair the dc terminal block 91, the communication terminal 92, and the antenna hole 93 in the first wiring cavity, or replace and repair the ac terminal block 94 in the second wiring cavity.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, a first routing hole 70 is provided on a side wall of the first mounting portion 31 on a side far from the second mounting portion 32, a second routing hole 71 is provided on a side wall of the third mounting portion 33 on a side far from the second mounting portion 32, a first avoidance region is formed on a side wall where the first mounting opening 311 is located, a second avoidance region is formed on a side wall where the second mounting opening 313 is located, the first routing hole 70 is located in the first avoidance region, the second routing hole 71 is located in the second avoidance region, and/or a second sealing cover plate 50 is provided on both the first routing hole 70 and the second routing hole 71.

In this embodiment, at the same time, the first routing hole 70 and the second routing hole 71 are used for routing, the connection wire in the first wiring cavity can be led out through the first routing hole 70 to be connected with the photovoltaic power generation device, and the connection wire in the second wiring cavity can be led out through the second routing hole 71 to be connected with an external power load. In practical application, a wiring pipeline 96 can be respectively installed on the first wiring hole 70 and the second wiring hole 71, a connecting wire in the first wiring cavity passes through the first wiring hole 70 and then enters the wiring pipeline 96 and is connected with an electric load, and a connecting wire in the second wiring cavity passes through the second wiring hole 71 and then enters the wiring pipeline 96 and is connected with a photovoltaic power generation device. Therefore, water can be prevented from entering the first wiring cavity and the second wiring cavity, and the working stability of the energy storage device is further guaranteed. When external equipment is not required to be connected, a second sealing cover plate 50 needs to be covered on the first wiring hole 70 and the second wiring hole 71 so as to seal the first wiring hole 70 and the second wiring hole 71 and prevent water from entering the first wiring cavity and the second wiring cavity.

As shown in fig. 4, in one embodiment of the present utility model, the side surface of the first mounting portion 31 is provided with the third routing hole 80 and/or the side surface of the third mounting portion 33 is provided with the fourth routing hole 90.

In the present embodiment, the side surface of the first mounting portion 31 refers to the rear side of the switch case 30, and only the side surface of the first mounting portion 31 is provided with the third wiring hole 80, or only the side surface of the third mounting portion 33 is provided with the fourth wiring hole 90, or the side surface of the first mounting portion 31 is provided with the third wiring hole 80, while the side surface of the third mounting portion 33 is provided with the fourth wiring hole 90. Through the arrangement, the connecting wires in the first wiring cavity can be led out of the first wiring hole 70 and can be led out of the third wiring hole 80 to be connected with an electric load, the connecting wires in the second wiring cavity can be led out of the second wiring hole 71 and can be led out of the fourth wiring hole 90 to be connected with a photovoltaic power generation device, and a user can select wiring from different positions of the switch box 30 according to actual application scenes, so that the applicability of the energy storage device can be improved.

It should be noted that, when the wires do not need to be routed from the third wire routing hole 80 or the fourth wire routing hole 90, a second sealing cover plate 50 is covered on each of the third wire routing hole 80 and the fourth wire routing hole 90 to seal the third wire routing hole 80 and the fourth wire routing hole 90 and prevent water from entering the first wire routing cavity and the second wire routing cavity.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the first mounting portion 31 is provided with the first routing hole 70 and the third routing hole 80, the third mounting portion 33 is provided with the second routing hole 71 and the fourth routing hole 90, and one routing pipe 96 is connected to each routing hole. At this time, the connection wire in the first wiring cavity may be drawn out from the first and third routing holes 70 and 80, and the connection wire in the second wiring cavity may be drawn out from the second and fourth routing holes 71 and 90.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the top of the second mounting portion 32 is provided with a third mounting opening, a third sealing cover plate 60 is provided on the upper cover of the third mounting opening, and a third electrical connection structure is provided on the third sealing cover plate 60, through which the switch box 30 is in plug-in fit with the inverter 10.

In this embodiment, the worker may extend into the intermediate chamber through the third mounting opening to mount the battery and the circuit board in the intermediate chamber. The third sealing cover plate 60 is provided with a third electric connection structure, the switch box 30 is in plug-in fit with the inverter 10 through the third electric connection structure, and the third electric connection structure and the inverter are electrically connected in a plug-in fit mode, so that the plug-in fit mode is free from complex wiring operation, and the installation and the disassembly are more convenient.

In one embodiment, the third electrical connection structure, the fourth electrical connection structure 211, and the fifth electrical connection structure are blind-mate connectors.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the number of battery modules 21 is plural, the plural battery modules 21 are sequentially stacked from bottom to top, the fourth electrical connection structure 211 is provided at the upper end of the battery module 21 at the top, and the fifth electrical connection structure capable of being adapted to the fourth electrical connection structure 211 is provided at the bottom of the switch case 30.

In this embodiment, a plurality of battery modules 21 are stacked in sequence from bottom to top, the number of battery modules 21 can be set according to the actual power demand, and two adjacent battery modules 21 are in plug-in fit, so that rapid stacking can be realized. The top end of the battery module 21 stacked on the uppermost side is provided with a fourth electrical connection structure 211, and the fourth electrical connection structure 211 can be in plug-in fit with a fifth electrical connection structure arranged at the bottom of the switch box 30, so that electrical connection between the switch box 30 and the battery module 21 is realized.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the upper end of the battery module 21 at the top is provided with a handle 95, and the bottom of the switch case 30 is provided with a groove capable of being mated with the handle 95.

In this embodiment, the upper end of the battery module 21 located at the top is provided with a handle 95, and the upper end of the battery module 21 located below is also provided with a handle 95, so that the battery module 21 is conveniently lifted upwards to be stacked. Meanwhile, when the switch box 30 is in plug-in fit with the battery module 21 positioned at the top, the groove at the bottom of the switch box 30 is aligned with the handle 95 at the upper end of the switch box 30, the handle 95 is gradually inserted into the groove, and after the handle 95 is completely inserted into the groove, the battery module 21 can be prevented from being laterally turned over by the fit between the handle 95 and the groove.

From the above description, it can be seen that the above-described embodiments of the present utility model achieve the following technical effects: be provided with switch box, energy storage module and dc-to-ac converter, the switch box has first wiring chamber, second wiring chamber and third wiring chamber, and the three is mutually independent setting, and first wiring chamber and second wiring chamber can provide accommodation space for connecting wire, first terminal structure and second terminal structure, and simultaneously, the connecting wire in the first wiring chamber can be used to be connected with photovoltaic power generation device, and the connecting wire in the second wiring chamber can be used to be connected with the electric load, and the intermediate chamber is used for installing battery and circuit board. Because the effect of first wiring chamber, second wiring chamber and middle chamber three is different and mutually independent sets up, consequently, connecting wire also is located different cavitys respectively according to its effect, makes things convenient for the staff to carry out the wiring.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An energy storage device, comprising:

an inverter (10);

an energy storage module (20) comprising at least one battery module (21); and

the switch box (30), switch box (30) set up dc-to-ac converter (10) with between energy storage module (20), switch box (30) are including first installation department (31), second installation department (32) and third installation department (33) of arranging in proper order along its length direction, first installation department (31) have first wiring chamber, second installation department (32) have middle chamber, third installation department (33) have second wiring chamber, first wiring chamber middle chamber and second wiring chamber three mutually independent sets up, first wiring intracavity is provided with first terminal structure, second wiring intracavity is provided with second terminal structure, middle chamber is constructed and is used for installing the circuit board, the circuit board through first electric connection structure with first terminal structure electricity is connected, the circuit board through second electric connection structure with second terminal structure electricity is connected.

2. The energy storage device according to claim 1, wherein the energy storage module (20), the switch box (30) and the inverter (10) are stacked in sequence from bottom to top, the top of the switch box (30) is in plug-in fit with the inverter (10), and the bottom of the switch box (30) is in plug-in fit with the energy storage module (20).

3. The energy storage device according to claim 1, wherein a first mounting opening (311) communicating with the first wiring cavity is provided on a side wall of the first mounting portion (31) away from the second mounting portion (32), a second mounting opening (313) communicating with the second wiring cavity is provided on a side wall of the third mounting portion (33) away from the second mounting portion (32), and a first sealing cover plate (40) is provided on each of the first mounting opening (311) and the second mounting opening (313).

4. The energy storage device according to claim 3, wherein the inner peripheral surfaces of the first mounting opening (311) and the second mounting opening (313) are provided with sealing clamping grooves (312), and the first sealing cover plate (40) is provided with a sealing structure capable of forming sealing fit with the sealing clamping grooves (312).

5. The energy storage device according to claim 3 or 4, wherein the first terminal structure is arranged on an inner wall of the first mounting portion (31) close to the second mounting portion (32), the first terminal structure comprises a direct current terminal row (91), a communication terminal (92) and an antenna hole (93), the first mounting opening (311) is arranged towards the direct current terminal row (91), the communication terminal (92) and the antenna hole (93), orthographic projection is performed on a mounting surface of the direct current terminal row (91), and the direct current terminal row (91), the communication terminal (92) and the antenna hole (93) are located in a projection plane of the first mounting opening (311); and/or the second terminal structure is arranged on the inner wall of the third mounting part (33) close to the second mounting part (32), the second terminal structure comprises an alternating current terminal row (94), and when the projection is carried out on the mounting surface of the alternating current terminal row (94), the projection of the alternating current terminal row (94) is positioned in a projection area surrounded by the projection of the outer contour of the second mounting opening (313).

6. The energy storage device according to claim 3 or 4, characterized in that a first routing hole (70) is provided on a side wall of the first mounting portion (31) away from the second mounting portion (32), a second routing hole is provided on a side wall of the third mounting portion (33) away from the second mounting portion (32), the first mounting opening (311) forms a first avoidance area on the side wall thereof, the second mounting opening (313) forms a second avoidance area on the side wall thereof, the first routing hole (70) is located in the first avoidance area, the second routing hole is located in the second avoidance area, and/or a second sealing cover plate (50) is provided on both the first routing hole (70) and the second routing hole.

7. Energy storage device according to any one of claims 1 to 4, characterized in that a side of the first mounting portion (31) is provided with a third routing hole (80) and/or a side of the third mounting portion (33) is provided with a fourth routing hole (90).

8. The energy storage device according to any one of claims 1 to 4, characterized in that a third mounting opening is provided at the top of the second mounting portion (32), a third sealing cover plate (60) is provided on the third mounting opening, a third electrical connection structure is provided on the third sealing cover plate (60), and the switch box (30) is in plug-in fit with the inverter (10) through the third electrical connection structure.

9. The energy storage device according to claim 8, wherein the number of the battery modules (21) is plural, the plural battery modules (21) are stacked in sequence from bottom to top, a fourth electrical connection structure (211) is provided at the upper end of the battery module (21) located at the top, and a fifth electrical connection structure capable of being adapted to the fourth electrical connection structure (211) is provided at the bottom of the switch box (30).

10. The energy storage device according to claim 9, characterized in that the upper end of the battery module (21) at the top is provided with a handle (95), and the bottom of the switch box (30) is provided with a groove capable of being matched with the handle (95).