CN220475460U

CN220475460U - Energy storage device

Info

Publication number: CN220475460U
Application number: CN202321866543.2U
Authority: CN
Inventors: 李美娜; 毛俊杰; 姜安营
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: the storage unit, the junction box and the inverter are stacked, the junction box is located between the storage unit and the inverter, the storage unit comprises at least one battery module, one end of the junction box is in plug-in fit with the inverter, and the other end of the junction box is in plug-in fit with the storage unit. According to the energy storage device disclosed by the technical scheme of the utility model, the problem that in the existing energy storage device, the inverter and the battery module are connected through the lead, so that the installation or the disassembly is difficult can be solved.

Description

Energy storage device

Technical Field

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

Background

With the continuous development of battery technology, home energy storage battery systems are increasingly used in life. The household energy storage battery system is characterized in that a roof solar module absorbs sunlight, and generated direct current is converted into alternating current through an inverter and stored in a battery module for use by household appliances.

In the prior art, the inverter and the battery module are connected through wires, and corresponding structures are required to be arranged on the inverter and the battery module to achieve threading. The utility model discloses a stacked capacity-increasing energy storage power supply in the related art, including energy storage dc-to-ac converter, battery module and unable adjustment base, a plurality of battery modules are from upwards piling up in proper order down and are fixed in unable adjustment base's upper end, battery module one side end is provided with the holding tank three, positive negative pole spliced pole setting is in the holding tank three, energy storage power supply is provided with the through wires hole, the through wires hole sets up in the upper and lower extreme of holding tank three and the lower extreme of holding tank two, the through wires hole is in the top or the below of battery module's positive negative pole terminal and energy storage dc-to-ac converter's binding post, so that battery module and energy storage dc-to-ac converter can carry out wire connection. Threading Kong Jiyao satisfies the threading demand, still needs to guarantee not to cause the influence to other structures, leads to the structure complicacy of dc-to-ac converter and battery module, inconvenient installation or dismantlement.

Disclosure of Invention

The utility model mainly aims to provide an energy storage device which can solve the problem that in the existing energy storage device, the inverter and the battery module are connected through a wire, so that the installation or the disassembly is difficult.

In order to achieve the above object, according to an aspect of the present utility model, there is provided an energy storage device comprising: the storage unit, the junction box and the inverter are stacked, the junction box is located between the storage unit and the inverter, the storage unit comprises at least one battery module, one end of the junction box is in plug-in fit with the inverter, and the other end of the junction box is in plug-in fit with the storage unit.

Further, the junction box comprises a first electric connection structure and a second electric connection structure, the top of the junction box is in plug-in fit with the inverter through the first electric connection structure, and the bottom of the junction box is in plug-in fit with the battery module located below the junction box through the second electric connection structure.

Further, the first electrical connection structure comprises at least one of an alternating current blind-mate connector, a communication blind-mate connector and a direct current blind-mate connector.

Further, the alternating current blind-insert connector, the communication blind-insert connector and the direct current blind-insert connector all comprise a first mounting structure, the first mounting structure comprises a floating plate, connecting pieces are arranged at two ends of the floating plate, the first ends of the connecting pieces are clamped on the floating plate, the second ends of the connecting pieces are connected with the top of the junction box, and the floating plate is configured to move along the length extending direction of the junction box relative to the junction box.

Further, both ends of the floating plate are provided with sliding grooves, the sliding grooves extend along the first direction, the first ends of the connecting pieces are configured to be capable of being arranged in the sliding grooves in a penetrating mode, and the floating plate can slide along the first direction relative to the connecting pieces.

Further, the first mounting structure further includes a guide post, the inverter is provided with a second mounting structure, the second mounting structure includes a mounting seat and a guide groove provided on the mounting seat, and the guide post is configured to be capable of being penetrated in the guide groove.

Further, a positioning column is arranged on the mounting seat, and a positioning groove which can be matched with the positioning column is arranged on the inverter.

Further, the bottom of battery module is provided with third electric connection structure, and the top of the battery module that is located the top is provided with the fourth electric connection structure that can with second electric connection structure looks adaptation, and the top of other battery module is provided with the fifth electric connection structure that can with third electric connection structure looks adaptation.

Further, the number of the battery modules is multiple, the battery modules are stacked in sequence from bottom to top, and two adjacent battery modules are in plug-in fit.

Further, the top of battery module is provided with and carries and draws location structure, and battery module's bottom is provided with can carry and draw location structure complex first recess.

Further, the number of the lifting positioning structures and the number of the first grooves are two, the two lifting positioning structures are arranged at the top end of the battery module at intervals along the horizontal direction, and the first grooves are arranged in one-to-one correspondence with the lifting positioning structures.

Further, the terminal box has and holds the chamber, and the both ends of terminal box are provided with the opening that holds the chamber intercommunication, and two opening parts all are provided with flip.

Further, the top of terminal box is provided with location structure, and location structure's height is greater than first electric connection structure's height, and the bottom of terminal box is provided with can with carry and draw location structure complex first recess.

Further, the energy storage device further comprises a base, leveling feet are arranged on the base, and the storage unit is arranged on the base.

By applying the technical scheme of the utility model, the storage unit, the junction box and the inverter are arranged, one end of the junction box is in plug-in fit with the inverter, so that the junction box and the inverter are electrically connected, and the other end of the junction box is in plug-in fit with the battery module of the storage unit, so that the junction box and the battery module are electrically connected. The inverter accessible terminal box is connected with the battery module, because between terminal box and the inverter to and all accessible connector is pegged graft the cooperation between terminal box and the battery module, compare in traditional mode through wire connection, need not to add the structure that supplies the wire to penetrate or wear out in addition on inverter and the battery module, the structure is simpler, convenient manufacturing, and when installing and dismantling, need not to unpack inverter or battery module, can directly carry out the plug to inverter or battery module, the installation is more simple and convenient with dismantling. In addition, this kind of stacked structure area from bottom to top is little, can be used to the family energy storage, simultaneously, through above-mentioned setting, can realize the integration of dc-to-ac converter, terminal box and battery module, conversion efficiency is higher.

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 is a schematic diagram of the overall structure of an energy storage device according to an embodiment of the present utility model;

FIG. 2 shows a schematic view of a portion of the structure of an energy storage device according to an embodiment of the present utility model;

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

fig. 4 shows a schematic structural view of an inverter of an embodiment of the present utility model at a junction position with a junction box;

fig. 5 shows a schematic perspective view of a second mounting structure of an embodiment of the utility model;

FIG. 6 shows a partial schematic view of a second mounting structure of an embodiment of the present utility model;

fig. 7 shows a perspective view of a first mounting structure of an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a storage unit; 11. a battery module; 111. a fourth electrical connection structure; 20. a junction box; 21. a first electrical connection structure; 211. an alternating current blind mate connector; 212. a communication blind-mate connector; 213. a direct current blind mate connector; 22. a first mounting structure; 23. a floating plate; 24. a connecting piece; 25. a chute; 26. a guide post; 261. a third groove; 30. an inverter; 40. lifting and positioning structure; 50. a seal ring; 60. a flip cover; 70. a positioning structure; 80. a base; 90. a second mounting structure; 91. a mounting base; 92. a guide groove; 921. a protrusion; 93. positioning columns; 94. a mounting hole; 95. and connecting the modules.

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 now to fig. 1 to 4 in combination, the present utility model provides an energy storage device comprising: the storage unit 10, the junction box 20 and the inverter 30 are stacked, the junction box 20 is located between the storage unit 10 and the inverter 30, the storage unit 10 comprises at least one battery module 11, one end of the junction box 20 is in plug-in fit with the inverter 30, and the other end of the junction box 20 is in plug-in fit with the storage unit 10.

In the present embodiment, the storage unit 10, the junction box 20, and the inverter 30 are stacked, the junction box 20 is located between the storage unit 10 and the inverter 30, the storage unit 10 may be located at the top of the junction box 20, the inverter 30 is located at the bottom of the junction box 20, or the storage unit 10 is located at the bottom of the junction box 20, and the inverter 30 is located at the top of the junction box 20. The junction box 20 is in plug-in fit with the inverter 30, so that the junction box 20 and the inverter 30 are electrically connected, and the junction box 20 is in plug-in fit with the battery module 11 below or above the junction box 20, so that the junction box 20 and the battery module 11 are electrically connected. The inverter 30 accessible terminal box 20 is connected with the battery module 11, because all accessible connector is pegged graft the cooperation between terminal box 20 and the inverter 30, and between terminal box 20 and the battery module 11, compare in traditional mode through wire connection, need not to add the structure that supplies the wire to penetrate or pass out in addition on inverter 30 and the battery module 11, the structure is simpler, the manufacturing of convenient processing, and when installing and dismantling, need not to unpack inverter 30 or battery module 11, can directly plug inverter 30 or battery module 11, the installation is more simple and convenient with dismantling. In addition, the stacking structure from bottom to top occupies a small area and can be used for household energy storage. In addition, the inverter 30 and the battery module 11 are connected through the junction box 20, and no additional wiring is needed, so that the electric energy loss of connecting wires is reduced, and the conversion rate can be improved.

Referring to fig. 1 to 4 in combination, in one embodiment of the present utility model, the junction box 20 includes a first electrical connection structure 21 and a second electrical connection structure, the top of the junction box 20 is in plug-fit with the inverter 30 through the first electrical connection structure 21, and the bottom of the junction box 20 is in plug-fit with the battery module 11 located therebelow through the second electrical connection structure.

In this embodiment, the inverter 30, the junction box 20 and the storage unit 10 are stacked sequentially from top to bottom, the bottom of the inverter 30 is provided with a structure capable of being matched with the first electrical connection structure 21, the two structures are electrically connected in a plug-in fit manner, the top of the battery module 11 below the junction box 20 is provided with a structure capable of being matched with the second electrical connection structure, and similarly, the junction box 20 and the battery module 11 are electrically connected in a plug-in fit manner. Meanwhile, the inverter 30 and the battery module 11 can be electrically connected through the junction box 20, and the plugging and matching mode is more convenient to install and detach without complex wiring operation.

As shown in fig. 4, in one embodiment of the present utility model, the first electrical connection structure 21 includes at least one of an ac blind mate connector 211, a communication blind mate connector 212, and a dc blind mate connector 213.

In this embodiment, the ac blind-mate connector 211 is used for implementing transmission of ac power, the dc blind-mate connector 213 is used for implementing transmission of dc power, and the communication blind-mate connector 212 is used for implementing transmission of data.

In one embodiment, the first electrical connection structure 21 includes an ac blind-mate connector 211, a communication blind-mate connector 212, and a dc blind-mate connector 213, where the ac blind-mate connector 211, the communication blind-mate connector 212, and the dc blind-mate connector 213 are sequentially arranged on the top surface of the junction box 20. The arrangement is convenient, and the wiring of the PCB board in the junction box 20 is convenient, so that the electromagnetic influence caused by the intersection of outgoing lines of connecting wires is avoided, and meanwhile, the inverter 30 and the junction box 20 can be quickly plugged, and wiring is avoided.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the ac blind mate connector 211, the communication blind mate connector 212, and the dc blind mate connector 213 each include a first mounting structure 22, the first mounting structure 22 includes a floating plate 23, both ends of the floating plate 23 are provided with a connection piece 24, a first end of the connection piece 24 is clamped on the floating plate 23, a second end of the connection piece 24 is connected to the top of the junction box 20, and the floating plate 23 is configured to be movable with respect to the junction box 20 in a length extending direction of the junction box 20.

In this embodiment, the connection module 95 is disposed on the floating plate 23, and the connection module 95 is in plug-in fit with the inverter 30 to realize electrical connection with the inverter 30, and the floating plate 23 can move along the length extension direction of the junction box 20 relative to the junction box 20, so that the connection module 95 mounted on the floating plate 23 also moves along with the floating plate 23, which facilitates alignment of the connection module 95 with the plug-in fit structure on the inverter 30, and makes connection simpler.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, both ends of the floating plate 23 are provided with sliding grooves 25, the sliding grooves 25 extending in a first direction, and the floating plate 23 is slidable in the first direction with respect to the link 24.

In this embodiment, the first direction refers to the length extending direction of the floating plate 23, the connecting pieces 24 at two ends of the floating plate 23 are fixedly connected with the junction box 20, one end of the chute 25 has an opening, the connecting pieces 24 can penetrate into the chute 25 through the opening, and the two connecting pieces 24 define the moving space of the floating plate 23.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, the first mounting structure 22 further includes a guide post 26, the inverter 30 is provided with a second mounting structure 90, the second mounting structure 90 includes a mounting seat 91 and a guide groove 92 provided on the mounting seat 91, and the guide post 26 is configured to be capable of being penetrated in the guide groove 92.

In this embodiment, a plurality of mounting holes 94 are formed in the mounting seat 91, a bolt is disposed in each mounting hole 94 to fixedly mount the mounting seat 91 on the inverter 30, the guide grooves 92 on the mounting seat 91 are arranged in one-to-one correspondence with the guide posts 26, the specific number of the guide posts 26 can be set according to actual needs, the third grooves 261 are formed in the guide posts 26, the protrusions 921 are disposed in the guide grooves 92, the protrusions 921 can be just clamped in the third grooves 261, the guide posts 26 play a guiding role, the matching of the protrusions 921 and the third grooves 261 can play a positioning role, and the first mounting structure 22 is prevented from being reversely inserted, and only after the third grooves 261 on the guide posts 26 are aligned with the protrusions 921 on the guide posts 92, the guide posts 26 can be inserted into the guide grooves 92. Through the above arrangement, the first mounting structure 22 and the second mounting structure 90 are more accurate when connected, and erroneous insertion is prevented.

Specifically, the connecting member 24 is a bolt, and the stud has a threaded section screwed into the junction box 20 and a cylindrical section that is caught in the chute 25.

In one embodiment, the end surface of the mounting seat 91 connected with the inverter 30 is provided with a sealing ring 50, and after the mounting seat 91 is connected with the inverter 30, the sealing ring 50 is pressed to realize sealing connection between the mounting seat 91 and the inverter.

Referring to fig. 1 to 7 in combination, in one embodiment of the present utility model, a positioning post 93 is provided on the mount 91, and a positioning groove capable of being engaged with the positioning post 93 is provided on the inverter 30.

In this embodiment, the end face of the mounting base 91 facing the inverter 30 is provided with positioning posts 93, the inverter 30 is provided with positioning grooves (not shown in the figure), the positioning grooves are in one-to-one correspondence with the positioning posts 93, when the mounting base 91 is mounted on the inverter 30, the positioning posts 93 are aligned and inserted into the positioning grooves on the inverter to realize positioning therebetween, and then the mounting base 91 is fixedly mounted on the inverter 30 through bolts.

Referring to fig. 1 to 4 in combination, in one embodiment of the present utility model, the number of battery modules 11 is plural, a plurality of battery modules 11 are stacked in sequence from bottom to top, and two adjacent battery modules 11 are mated by plugging.

In this embodiment, the storage unit 10 includes a plurality of battery modules 11, and a plurality of battery modules 11 are stacked in turn from bottom to top, can set up the quantity of battery modules 11 according to actual power consumption demand to be the grafting cooperation between two adjacent battery modules 11, can realize piling up fast, the electric quantity of storage unit 10 is prepared more nimble portably.

Referring to fig. 1 to 4 in combination, in one embodiment of the present utility model, the bottom end of the battery module 11 is provided with a third electrical connection structure, the top end of the battery module 11 positioned at the top is provided with a fourth electrical connection structure 111 capable of being matched with the second electrical connection structure, and the top ends of the other battery modules 11 are provided with fifth electrical connection structures capable of being matched with the third electrical connection structure.

In this embodiment, the inverter 30, the junction box 20 and the storage unit 10 are stacked sequentially from top to bottom, the number of the battery modules 11 is multiple, the bottom ends of all the battery modules 11 are all provided with third electrical connection structures, the top ends of the battery modules 11 stacked on the uppermost are provided with fourth electrical connection structures 111 which can be matched with the second electrical connection structures, the top ends of other battery modules 11 located below the battery modules 11 are provided with fifth electrical connection structures, and the fifth electrical connection structures can be matched with the third electrical connection structures. Namely, between two adjacent battery modules 11, the fifth electric connection structure of the battery module 11 positioned below and the third electric connection structure of the battery module 11 positioned above are in plug-in fit to realize electric connection. By the above arrangement, connection between the battery modules 11 and the junction box 20 can be achieved.

Referring to fig. 1 to 3 in combination, in one embodiment of the present utility model, the top end of the battery module 11 is provided with a pull-up positioning structure 40, and the bottom end of the battery module 11 is provided with a first groove capable of being engaged with the pull-up positioning structure 40.

In the present embodiment, the inverter 30, the junction box 20 and the storage unit 10 are stacked sequentially from top to bottom, and the top end of each battery module 11 is provided with a lifting and positioning structure 40, and the lifting and positioning structure 40 is a handle structure, so that the battery modules 11 are conveniently lifted and stacked upwards.

As shown in fig. 2, in one embodiment of the present utility model, the number of the lifting and positioning structures 40 and the number of the first grooves (not shown in the drawings) are two, and the two lifting and positioning structures 40 are arranged at the top end of the battery module 11 at intervals along the horizontal direction, and each first groove is arranged in one-to-one correspondence with each lifting and positioning structure 40.

In this embodiment, two lifting and positioning structures 40 are arranged at the top end of the battery module 11 along the length extending direction of the battery module 11 at intervals, two first grooves are arranged at the bottom end of the battery module 11 along the length extending direction of the battery module 11 at intervals, and the first grooves and the lifting and positioning structures 40 are in one-to-one correspondence. The two lifting and positioning structures 40 of the battery module 11 located below can be correspondingly clamped in the two first grooves of the battery module 11 located above the two lifting and positioning structures, and when stacking, the two lifting and positioning structures can be used for positioning the two lifting and positioning structures and preventing the battery module 11 from turning on one's side, so that the stability of the whole structure is guaranteed.

In one embodiment of the present utility model, the junction box 20 has a receiving cavity, openings communicating with the receiving cavity are provided at both ends of the junction box 20, and a flip cover 60 is provided at both openings.

In this embodiment, the junction box 20 has a housing cavity, a connection terminal is disposed in the housing cavity, openings are disposed at two ends of the housing cavity, wiring is conveniently performed from two sides, one side is used for connecting with a photovoltaic device, and the other side is used for connecting with an electrical device. A flip 60 is provided at the opening to seal the junction box.

As shown in fig. 4, in one embodiment of the present utility model, the top end of the junction box 20 is provided with a positioning structure 70, the height of the positioning structure 70 is greater than that of the first electrical connection structure 21, and the bottom end of the junction box 20 is provided with a first groove capable of being matched with the lifting positioning structure 40.

In this embodiment, the bottom of the inverter 30 is provided with a second groove that can be matched with the positioning structure 70, when the inverter 30 and the junction box 20 are in plug-in fit, the second groove at the bottom of the inverter 30 is aligned with the positioning structure 70 at the top of the junction box 20, so as to realize preliminary positioning between the inverter 30 and the junction box 20, and the height of the positioning structure 70 is greater than that of the first electrical connection structure 21, thus the positioning structure 70 can guide the inverter 30, so that the relative positions of the two are more accurate, and the plug-in fit of the bottom of the inverter 30 and the first electrical connection structure 21 is facilitated.

It should be noted that the second electrical connection structure, the third electrical connection structure, the fourth electrical connection structure, and the fifth electrical connection structure are blind-mate connectors.

In one embodiment, the locating structure 70 is a locating pin.

Referring to fig. 1 and 2 in combination, in one embodiment of the present utility model, the energy storage device further includes a base 80, a leveling foot is provided on the base 80, and the storage unit 10 is mounted on the base 80.

In the present embodiment, the energy storage device is composed of the base 80, the storage unit 10, the junction box 20, and the inverter 30, which are stacked in this order from bottom to top, and can be floor mounted or wall mounted. Be provided with the leveling lower margin on the base 80, can guarantee energy storage device holistic stability, when hanging the installation, can dismantle the leveling lower margin, install the base 80 on the hanging structure. When the battery module 11 is mounted, the base 80 is first landed, the battery modules 11 are stacked upward, the number of the battery modules 11 can be selected according to the electric quantity demand, and then the junction box 20 and the inverter 30 are stacked upward in sequence.

From the above description, it can be seen that the above-described embodiments of the present utility model achieve the following technical effects: the battery module is provided with a storage unit, a junction box and an inverter, one end of the junction box is in plug-in connection with the inverter, electric connection between the junction box and the inverter is achieved, and the other end of the junction box is in plug-in connection with the battery module of the storage unit, so that electric connection between the junction box and the battery module is achieved. The inverter accessible terminal box is connected with the battery module, because between terminal box and the inverter to and all accessible connector is pegged graft the cooperation between terminal box and the battery module, compare in traditional mode through wire connection, need not to add the structure that supplies the wire to penetrate or wear out in addition on inverter and the battery module, the structure is simpler, convenient manufacturing, and when installing and dismantling, need not to unpack inverter or battery module, can directly carry out the plug to inverter or battery module, the installation is more simple and convenient with dismantling. In addition, this kind of stacked structure area from bottom to top is little, can be used to the family energy storage, simultaneously, through above-mentioned setting, can realize the integration of dc-to-ac converter, terminal box and battery module, conversion efficiency is higher.

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:

the storage unit (10), terminal box (20) and dc-to-ac converter (30), storage unit (10) terminal box (20) and dc-to-ac converter (30) three superpose, just terminal box (20) are located storage unit (10) with between dc-to-ac converter (30), storage unit (10) include at least one battery module (11), the one end of terminal box (20) with dc-to-ac converter (30) grafting cooperation, the other end of terminal box (20) with storage unit (10) grafting cooperation.

2. The energy storage device according to claim 1, wherein the junction box (20) comprises a first electrical connection structure (21) and a second electrical connection structure, the top of the junction box (20) is in plug-in fit with the inverter (30) through the first electrical connection structure (21), and the bottom of the junction box (20) is in plug-in fit with the battery module (11) located below the junction box through the second electrical connection structure.

3. The energy storage device according to claim 2, wherein the first electrical connection structure (21) comprises at least one of an ac blind mate connector (211), a communication blind mate connector (212) and a dc blind mate connector (213).

4. The energy storage device according to claim 3, characterized in that the ac blind mate connector (211), the communication blind mate connector (212) and the dc blind mate connector (213) each comprise a first mounting structure (22), the first mounting structures (22) comprise a floating plate (23), both ends of the floating plate (23) are provided with connecting pieces (24), the first ends of the connecting pieces (24) are clamped on the floating plate (23), the second ends of the connecting pieces (24) are connected with the top of the junction box (20), and the floating plate (23) is configured to be movable relative to the junction box (20) along the length extension direction of the junction box (20).

5. Energy storage device according to claim 4, wherein both ends of the floating plate (23) are provided with a chute (25), the chute (25) extending in a first direction, one end of the connecting piece (24) being configured to be able to be threaded into the chute (25), the floating plate (23) being slidable in the first direction relative to the connecting piece (24).

6. The energy storage device of claim 4, wherein the first mounting structure (22) further comprises a guide post (26), the inverter (30) is provided with a second mounting structure (90), the second mounting structure (90) comprises a mounting seat (91) and a guide groove (92) arranged on the mounting seat (91), and the guide post (26) is configured to be capable of being penetrated in the guide groove (92).

7. The energy storage device according to claim 6, characterized in that the mounting base (91) is provided with a positioning column (93), and the inverter (30) is provided with a positioning groove capable of being matched with the positioning column (93).

8. The energy storage device according to claim 2, wherein a third electrical connection structure is provided at the bottom end of the battery module (11), a fourth electrical connection structure (111) capable of being adapted to the second electrical connection structure is provided at the top end of the battery module (11) at the top, and a fifth electrical connection structure capable of being adapted to the third electrical connection structure is provided at the top ends of the other battery modules (11).

9. The energy storage device according to claim 1, wherein the number of the battery modules (11) is plural, the plural battery modules (11) are stacked in sequence from bottom to top, and two adjacent battery modules (11) are in plug-in fit.

10. The energy storage device according to claim 2, characterized in that a lifting and positioning structure (40) is provided at the top end of the battery module (11), and a first groove capable of being matched with the lifting and positioning structure (40) is provided at the bottom end of the battery module (11).

11. The energy storage device according to claim 10, wherein the number of the lifting and positioning structures (40) and the number of the first grooves are two, the two lifting and positioning structures (40) are arranged at the top end of the battery module (11) at intervals along the horizontal direction, and the first grooves are arranged in one-to-one correspondence with the lifting and positioning structures (40).

12. The energy storage device according to claim 1, wherein the junction box (20) is provided with a containing cavity, two ends of the junction box (20) are provided with openings communicated with the containing cavity, and two openings are provided with flip covers (60).

13. The energy storage device according to claim 10, wherein a top end of the junction box (20) is provided with a positioning structure (70), a height of the positioning structure (70) is larger than a height of the first electrical connection structure (21), and a bottom end of the junction box (20) is provided with the first groove capable of being matched with the lifting positioning structure (40).

14. Energy storage device according to any of claims 1 to 13, further comprising a base (80), said base (80) being provided with leveling feet, said storage unit (10) being mounted on said base (80).