Energy storage equipment

Abstract

The embodiment of the utility model relates to energy storage equipment, which comprises at least two battery packs stacked along a first direction, each battery pack comprises a shell and a battery module arranged in the shell, the shell comprises a first side and a second side which are opposite to each other, the first side is provided with a boss, the boss is provided with a first connecting piece, and / or the second side is provided with a first groove, and the first groove is provided with a second connecting piece. The boss is provided with a first groove, the first groove is provided with a second connecting piece, the shape and the size of the boss are matched with the shape and the size of the first groove, when the two battery packs are stacked in the first direction, the boss of one battery pack is embedded into the first groove of the other battery pack, and the first connecting piece of one battery pack is connected with the second connecting piece of the other battery pack. According to the energy storage equipment provided by the embodiment of the utility model, the battery packs are connected and fixed through the bosses and the first grooves, so that the energy storage equipment is simple in structure, easy to manufacture, relatively low in cost and not easy to damage or loosen, the situations of collision, damage and the like of connecting pieces of the battery packs are effectively reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the technical field of energy storage, especially relates to an energy storage device. BACKGROUND

[0002] All countries in the world are advocating green environmental protection and advocating the use of green energy. In recent years, the new energy storage industry has been continuously and rapidly developing. Lithium iron phosphate batteries and the like are currently the first choice for the energy storage industry due to their high safety and stability. The common energy storage battery systems at present are divided into integrated energy storage battery systems and split energy storage battery systems, and the split energy storage battery system adopts a cable to connect multiple battery packs to increase the energy storage capacity of the energy storage battery system.

[0003] In the related art, the split energy storage battery system generally adopts an up-down stacking structure, and the batteries stacked up and down need to be fastened through a connecting and fixing structure (connecting plug or handle, etc.), for example, the Chinese utility model patent with the application number 202222692537.1 and the name "an energy storage battery system" adopts a technical solution of setting a bracket and a handle at the bottom and the top of the battery pack respectively to connect and fix the battery pack. However, in this solution, the connecting and fixing structure of the battery pack is relatively complex, the connecting and fixing structure is easy to be damaged or loose, the connection and assembly of the battery pack and the after-sales maintenance and replacement are not convenient, and the bracket and the handle need to be additionally set, which is high in cost. UTILITY MODEL CONTENT

[0004] Therefore, one of the purposes of the embodiments of the utility model is to provide an energy storage device, which aims to solve the technical problem of the complex, easy-to-damage or loose connecting and fixing structure of the battery pack in the prior art.

[0005] To solve the above technical problems, the embodiments of the utility model provide the following technical solutions:

[0006] In a first aspect, the embodiments of the utility model provide an energy storage device, which comprises:

[0007] At least two battery packs stacked along a first direction, the battery pack comprising a shell and a battery module arranged in the shell;

[0008] The shell comprises opposite first and second sides;

[0009] The first side is provided with a boss, and the boss is provided with a first connecting piece; and / or,

[0010] The second side is provided with a first recess, and the first recess is provided with a second connecting piece;

[0011] The shape and size of the protrusion and the shape and size of the first recess are matched, and the protrusion of one of the battery packs is embedded in the first recess of the other battery pack when the two battery packs are stacked in the first direction, and the first connecting member of one of the battery packs is connected with the second connecting member of the other battery pack.

[0012] In some embodiments, a second recess is arranged on the protrusion, and the first connecting member is arranged in the second recess.

[0013] In some embodiments, the height of the second connecting member in the first direction is less than the depth of the first recess.

[0014] In some embodiments, the second side is provided with a first protrusion and a second protrusion, the first protrusion and the second protrusion constitute the first recess, and the recessed part of the first recess is in or approximately in a cuboid structure.

[0015] In some embodiments, the first side is provided with a first platform and a second platform, and the first platform and the second platform make the protrusion in or approximately in a cuboid structure.

[0016] In some embodiments, the first connecting member is a plug, and the second connecting member is a socket.

[0017] In some embodiments, the shell comprises a first side wall, a second side wall, a third side wall and a fourth side wall, and the first side wall and the second side wall are respectively provided with a gripping member for carrying the shell and the battery module arranged in the shell.

[0018] In some embodiments, the energy storage device further comprises a display assembly arranged on the first side wall, the second side wall, the third side wall or the fourth side wall of the shell of the battery pack at the first position among the at least two battery packs stacked in the first direction, and the display assembly is used to display battery information of the energy storage device.

[0019] In some embodiments, the energy storage device further comprises a moving assembly arranged on the second side of the shell of the battery pack at the second position among the at least two battery packs stacked in the first direction and fixedly connected with the shell of the battery pack at the second position, and the moving assembly is used to move the energy storage device.

[0020] In some embodiments, the moving assembly includes a first connecting block, a second connecting block, and four groups of universal wheels, the first connecting block and the second connecting block are fixedly installed on a second side of a shell of the battery pack in the second position, two groups of universal wheels in the four groups of universal wheels are fixedly installed on a first end and a second end of the first connecting block respectively, and the other two groups of universal wheels in the four groups of universal wheels are fixedly installed on a first end and a second end of the second connecting block respectively.

[0021] The energy storage device provided in the embodiment of the utility model is different from the prior art, and includes at least two battery packs stacked along a first direction, the battery pack includes a shell and a battery module arranged in the shell, the shell includes opposite first and second sides, the first side is provided with a boss, the boss is provided with a first connecting piece, and / or the second side is provided with a first groove, the first groove is provided with a second connecting piece, the shape and size of the boss are matched with the shape and size of the first groove, when the two battery packs are stacked along the first direction, the boss of one battery pack is embedded in the first groove of the other battery pack, and the first connecting piece of one battery pack is connected with the second connecting piece of the other battery pack.

[0022] In the energy storage device provided in the embodiment of the utility model, the battery packs are connected and fixed through the boss and the first groove, the structure is simple, the battery pack is integrally formed, easy to manufacture, low in cost, not easy to damage or loosen, effectively reducing the knocking or damage of the connecting piece of the battery pack, and prolonging the service life of the connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings described below only show some embodiments of the utility model, and should not be regarded as a limitation to the protection scope. For ordinary skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 is the assembly structure schematic view of the energy storage device provided in some embodiments of the utility model;

[0025] Figure 2 is the disassembly structure schematic view of the energy storage device provided in some embodiments of the utility model;

[0026] Figure 3 is another view schematic view of the disassembly structure of the energy storage device provided in some embodiments of the utility model;

[0027] Figure 4is a structural schematic view of a battery pack in an energy storage device provided by some embodiments of the utility model;

[0028] Figure 5 is another view of the structural schematic view of the battery pack in the energy storage device provided by some embodiments of the utility model;

[0029] Figure 6 is another view of the structural schematic view of the energy storage device provided by some embodiments of the utility model;

[0030] Figure 7 is an enlarged structural schematic view of A of the structural schematic view of the energy storage device provided by some embodiments of the utility model.

[0031] Explanation of reference signs:

[0032] 100, energy storage device;

[0033] 10, battery pack;

[0034] 11, shell; 111, first side; 112, second side; 113, first side wall; 114, second side wall; 115, third side wall; 116, fourth side wall;

[0035] 12, battery module;

[0036] 13, boss; 131, first connecting piece; 132, second groove; 133, first platform; 134, second platform; 135, cover plate; 1351, opening;

[0037] 14, first groove; 141, second connecting piece; 142, first protrusion; 143, second protrusion;

[0038] 15, holding piece; 16, display assembly;

[0039] 17, moving assembly; 171, first connecting block; 172, second connecting block; 173, universal wheel;

[0040] 18, switch assembly; 19, first connector; 20, second connector. DETAILED DESCRIPTION

[0041] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The detailed description of the embodiments of the present application in the following drawings is not intended to limit the scope of the present application, but only to represent selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0042] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right", "upper" and "lower" as used in this specification and the like specify relative positions or orientations based on the orientations or positions shown in the drawings.

[0043] Still need to be explained, the terms "first", "second" and other similar expressions used in the present application are only for the purpose of facilitating the description and distinguishing the same items or similar items with basically the same function and effect, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more in number, unless otherwise specifically limited or clearly specified. It should be noted that although the functional modules are divided in the device or structure schematic diagram, in some cases, the module division in the device or structure can be different.

[0044] Unless otherwise defined, the technical terms and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the art to which the present application belongs. The terms used in the present application are only for the purpose of describing the specific embodiments, and are not used to limit the present application. The term "and / or" used in the present application includes any and all combinations of one or more related listed items. It should be understood that the technical features involved in each of the embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0045] Please refer to Figures 1-4 , Figures 1-4 The structure schematic diagram of the energy storage device 100 provided by some embodiments of the present application is schematically shown.

[0046] Specifically, the energy storage device 100 comprises at least two battery packs 10 stacked along a first direction, in some feasible embodiments, the first direction isFigure 1 a direction N, Figures 1-4 Four battery packs 10 are shown stacked along the direction N.

[0047] The battery pack 10 comprises a housing 11 and a battery module 12 arranged in the housing 11, the housing 11 comprises opposite first and second sides 111 and 112, respectively, which are upper and lower sides when the battery pack 10 is stacked along the direction N.

[0048] The first side 111 of the housing 11 is provided with a boss 13, and the boss 13 is provided with a first connecting piece 131, and / or the second side 112 of the housing 11 is provided with a first recess 14, and the first recess 14 is provided with a second connecting piece 141. In some embodiments, the boss 13 comprises a cover plate 135, which is used to cover the housing 11 so as to isolate the battery module 12 arranged in the housing 11. In order to enable the first connecting piece 131 to be connected with the second connecting piece 141, a hole 1351 is formed on one side of the cover plate 135 close to the first connecting piece 131, and the first connecting piece 131 is connected with the second connecting piece 141 through the hole 1351.

[0049] In some embodiments, when the second connecting piece 141 is arranged in the first recess 14, the height of the second connecting piece 141 along the first direction is less than the depth of the first recess 14, so that the first recess 14 protects the second connecting piece 141, and the second connecting piece 141 is not easily knocked or damaged, thereby prolonging the service life of the second connecting piece 141.

[0050] It can be understood that when the battery pack 10 is in the first position, the first side 111 of the housing 11 in the battery pack 10 is not provided with the boss 13, for example, when the battery pack 10 is stacked along the direction N, the battery pack 10 in the first position is the uppermost battery pack 10, and the first side 111 of the housing 11 of the uppermost battery pack 10 is not provided with the boss 13. When the battery pack 10 is in the second position, the second side 112 of the housing 11 of the battery pack 10 is not provided with the first recess 14, for example, when the battery pack 10 is stacked along the direction N, the battery pack 10 in the second position is the lowermost battery pack 10, and the second side 112 of the housing 11 of the lowermost battery pack 10 is not provided with the first recess 14.

[0051] The shape and size of the boss 13 and the shape and size of the first groove 14 are matched, the boss 13 of one of the two battery packs 10 is embedded in the first groove 14 of the other battery pack 10 when the two battery packs 10 are stacked along the first direction, and the first connecting piece 131 of one of the two battery packs 10 is connected with the second connecting piece 141 of the other battery pack 10. It can be understood that the first connecting piece 131 is connected with the second connecting piece 141, and the two battery packs 10 can be electrically connected to form a larger capacity energy storage device.

[0052] For example, when any two battery packs 10 are stacked along the direction N, the boss 13 of the lower battery pack 10 is embedded in the first groove 14 of the upper battery pack 10, and the first connecting piece 131 of the lower battery pack 10 is connected with the second connecting piece 141 of the upper battery pack 10.

[0053] In the energy storage device provided by the embodiment of the utility model, the boss of one of any two battery packs stacked along the first direction is embedded in the first groove of the other battery pack, so that the first connecting piece of one of the two battery packs is connected with the second connecting piece of the other battery pack. The boss and the first groove are used to connect and fix the battery pack, the connecting structure is simple, the boss and the first groove are integrally formed with the battery pack, easy to manufacture, low cost, and not easy to damage or loosen. The first connecting piece and the second connecting piece are arranged on the boss and the first groove respectively, and the boss and the first groove can protect the first connecting piece and the second connecting piece respectively, effectively reducing the bumping and damage of the first connecting piece and the second connecting piece of the battery pack, and prolonging the service life.

[0054] Please refer to Figure 2 Or Figure 4 In some embodiments, the boss 13 is provided with a second groove 132, and the first connecting piece 131 is arranged in the second groove 132. The first connecting piece 131 is arranged in the second groove 132, and the height of the first connecting piece 131 along the first direction is less than the depth of the second groove 132, so that the second groove 132 protects the first connecting piece 131, so that the first connecting piece 131 is not easy to be bumped or damaged, and the service life of the first connecting piece 131 is prolonged.

[0055] Please refer to Figure 2 Or Figure 4 In some embodiments, the first side 111 of the shell 11 is provided with a first platform 133 and a second platform 134, and the first platform 133 and the second platform 134 make the boss 13 or substantially present a cuboid structure.

[0056] Please refer to Figure 3 Or Figure 5In some embodiments, the second side 112 of the shell 11 is provided with a first protrusion 142 and a second protrusion 143, which constitute a first recess 14, the recessed part of the first recess 14 is or approximately is a cuboid structure, and the height of the second connecting member 141 in the first direction is less than the depth of the recessed part of the first recess 14 (i.e., the height of the second connecting member 141 in the first direction is less than the depth of the first recess 14). The protrusion 13 and the recessed part of the first recess 14 are or approximately are cuboid structures, which can reduce the shaking and enhance the stability of the connection between the two battery packs 10 when the two battery packs 10 are stacked.

[0057] In some embodiments, the first connecting member 131 is a plug, and the second connecting member 141 is a socket. When any two battery packs 10 are stacked, the plug of one battery pack 10 is connected to the socket of the other battery pack 10, so that the two battery packs 10 are electrically connected in communication, forming a larger-capacity energy storage device. It can be understood that the first connecting member 131 and the second connecting member 141 can also be any other suitable components, and those skilled in the art can select any suitable components according to actual needs, and the embodiments of the utility model do not make any limitation in this regard.

[0058] Please refer to Figure 1 and Figure 6 In some embodiments, the shell 11 of the battery pack 10 includes a first side wall 113, a second side wall 114, a third side wall 115, and a fourth side wall 116, and the first side wall 113 and the second side wall 114 are respectively provided with a handle 15, which is used for carrying the shell 11 and the battery module 12 arranged in the shell 11. When carrying the battery pack 10, the user holds the handle 15 and moves the entire battery pack 10, thereby carrying the shell 11 and the battery module 12 arranged in the shell 11.

[0059] Please refer to Figure 1 In some embodiments, the energy storage device 100 further includes a display assembly 16, which is arranged on the first side wall 113, the second side wall 114, the third side wall 115, or the fourth side wall 116 of the shell of the battery pack 10 located at the first position among the at least two battery packs 10 stacked in the first direction. Figure 1In the shown structure, the battery packs 10 are stacked along the direction N, the battery pack 10 at the first position is the uppermost battery pack 10, and the display assembly 16 is arranged on the third side wall 115 of the housing 11 of the uppermost battery pack 10. It should be understood that the display assembly 16 can also be arranged on the first side wall 113, the second side wall 114, the third side wall 115 or the fourth side wall 116 of the battery pack 10 at other positions according to actual needs. The number of the display assembly 16 can be single or multiple, and when multiple display assemblies 16 are included, each display assembly 16 can be arranged at any suitable position according to actual needs, and the embodiments of the utility model do not make any limitation in this regard.

[0060] The display assembly 16 is used to display the battery information of the energy storage device 100, for example, the display assembly 16 is used to display the power, temperature, current, voltage and working state information of the battery module 12 in each battery pack 10. In some embodiments, the display assembly 16 can be a display screen such as a display screen, a touch screen or a touch screen. It should be easily understood that the display assembly 16 can also be any other suitable device, apparatus or component, and the embodiments of the utility model do not make any limitation in this regard.

[0061] Please refer to Figure 3 In some embodiments, the energy storage device 100 further comprises a moving assembly 17 arranged on the second side 112 of the housing 11 of the battery pack 10 at the second position among the at least two battery packs 10 stacked along the first direction and fixedly connected with the housing 11 of the battery pack 10 at the second position, and the moving assembly 17 is used to move the energy storage device 100. Figure 3 In the shown structure, the battery packs 10 are stacked along the direction N, the battery pack 10 at the second position is the lowermost battery pack 10, and the moving assembly 17 is arranged on the second side 112 of the housing 11 of the lowermost battery pack 10 and fixedly connected with the housing 11 of the lowermost battery pack 10.

[0062] When the energy storage device 100 is moved, the moving assembly 17 carries the energy storage device 100 on the ground and is in contact with the ground to form a relatively smooth contact surface, thereby facilitating the movement of the energy storage device 100.

[0063] Please refer to Figure 3In some embodiments, the moving assembly 17 of the energy storage device 100 comprises a first connecting block 171, a second connecting block 172, and four groups of universal wheels 173. The first connecting block 171 and the second connecting block 172 are fixedly installed on the second side 112 of the shell 11 of the battery pack 10 located at the second position. Two groups of universal wheels 173 among the four groups of universal wheels 173 are fixedly installed on the first end and the second end of the first connecting block 171, respectively. The other two groups of universal wheels 173 among the four groups of universal wheels 173 are fixedly installed on the first end and the second end of the second connecting block 172, respectively.

[0064] In Figure 3 In the structure shown in the figure, the battery packs 10 are stacked along the direction N, and the battery pack 10 located at the second position is the lowermost battery pack 10. The first connecting block 171 and the second connecting block 172 are fixedly installed on the second side 112 of the shell 11 of the lowermost battery pack 10. Two groups of universal wheels 173 among the four groups of universal wheels 173 are fixedly installed on the first end (left end) and the second end (right end) of the first connecting block 171, respectively. The other two groups of universal wheels 173 among the four groups of universal wheels 173 are fixedly installed on the first end (left end) and the second end (right end) of the second connecting block 172, respectively.

[0065] When the energy storage device 100 is moved, the first connecting block 171, the second connecting block 172, and the four groups of universal wheels 173 bear the energy storage device 100 on the ground. The four groups of universal wheels 173 are in contact with the ground, forming a relatively smooth contact surface, which facilitates the movement of the energy storage device 100. In addition, the universal wheels 173 can rotate in any direction, thereby facilitating the change of the direction of the energy storage device 100.

[0066] Please refer to Figure 1 and Figure 7 In some embodiments, the energy storage device 100 further comprises a switch assembly 18. The switch assembly 18 is arranged on the first side wall 113, the second side wall 114, the third side wall 115, or the fourth side wall 116 of the shell 11 of the battery pack 10 located at the first position among the at least two battery packs 10 stacked along the first direction. Figure 1 In the structure shown in the figure, the battery packs 10 are stacked along the direction N, and the battery pack 10 located at the first position is the uppermost battery pack 10. The switch assembly 18 is arranged on the first side wall 113 of the shell 11 of the uppermost battery pack 10. It should be understood that the switch assembly 18 can also be arranged on the first side wall 113, the second side wall 114, the third side wall 115, or the fourth side wall 116 of the battery pack 10 located at other positions according to actual needs, and the embodiments of the present application do not make any limitation in this regard.

[0067] The switch assembly 18 is used to start or stop the energy storage device 100, so that each battery pack 10 of the energy storage device 100 starts to work or stops. In some embodiments, the switch assembly 18 can be a button switch, a rocker switch (a rocker switch), a rotary switch or a sliding switch, and it is easily understood that the switch assembly 18 can also be any other suitable device, device or component, and the embodiments of the utility model do not make any limitation.

[0068] Please refer to Figure 1 and Figure 7 In some embodiments, the energy storage device 100 further comprises a first connector 19 and a second connector 20, and the first connector 19 and the second connector 20 are arranged on the first side wall 113, the second side wall 114, the third side wall 115 or the fourth side wall 116 of the shell 11 of the battery pack 10 located at the first position among the at least two battery packs 10 stacked along the first direction. Figure 1 In the structure shown, the battery packs 10 are stacked along the direction N, the battery pack 10 located at the first position is the uppermost battery pack 10, and the first connector 19 and the second connector 20 are arranged on the first side wall 113 of the shell 11 of the uppermost battery pack 10. It should be understood that the first connector 19 and the second connector 20 can also be arranged on the first side wall 113, the second side wall 114, the third side wall 115 or the fourth side wall 116 of the battery pack 10 located at other positions according to actual needs, and the embodiments of the utility model do not make any limitation.

[0069] The first connector 19 and the second connector 20 are used to be connected with an external load, so that the energy storage device 100 can supply power to the external load through the first connector 19 and the second connector 20. In some embodiments, the first connector 19 is a positive connector, and the second connector 20 is a negative connector, or in other embodiments, the first connector 19 is a negative connector, and the second connector 20 is a positive connector. It should be understood that the external load can be any suitable device or device that needs to be powered, and the embodiments of the utility model do not make any limitation.

[0070] In summary, the energy storage device provided by the embodiments of the utility model comprises at least two battery packs stacked along a first direction, each battery pack comprising a shell and a battery module arranged in the shell, the shell comprising opposite first and second sides, the first side being provided with a boss, the boss being provided with a first connecting piece, and / or the second side being provided with a first recess, the first recess being provided with a second connecting piece, the shape and size of the boss being matched with the shape and size of the first recess, and when the two battery packs are stacked along the first direction, the boss of one of the battery packs is embedded in the first recess of the other battery pack, and the first connecting piece of one of the battery packs is connected with the second connecting piece of the other battery pack.

[0071] The energy storage device is connected and fixed through the convex plate and the first recess between the battery packs, has simple structure, is easy to manufacture, is low in cost, is not prone to damage or loosening, effectively reduces the knocking and damage of the connecting piece of the battery pack, and prolongs the service life.

[0072] The skilled in the art can understand that the above technical features can be used in any combination without limitation. The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to more clearly understand the technical features, purposes and effects of the utility model and to implement the same, and the utility model cannot be limited by the protection scope, and any equivalent structure or equivalent process conversion using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, should be reasonably included in the protection scope of the utility model.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: at least two battery packs stacked along a first direction, each battery pack comprising a housing and a battery module arranged in the housing; the housing comprises opposite first and second sides; the first side is provided with a boss, the boss is provided with a first connector; and / or, the second side is provided with a first groove, the first groove is provided with a second connector; the boss and the first groove are shaped and sized to fit each other, when two battery packs are stacked along the first direction, the boss of one battery pack is embedded in the first groove of the other battery pack, and the first connector of one battery pack is connected to the second connector of the other battery pack.

2. The energy storage device of claim 1, wherein, The boss is provided with a second groove, and the first connector is arranged in the second groove.

3. The energy storage device of claim 2, wherein, The height of the second connector along the first direction is less than the depth of the first groove.

4. The energy storage device of claim 2, wherein, The second side is provided with a first protrusion and a second protrusion, the first protrusion and the second protrusion form the first groove, and the recessed part of the first groove is in or approximately in a cuboid structure.

5. The energy storage device of claim 4, wherein, The first side is provided with a first platform and a second platform, the first platform and the second platform make the boss in or approximately in a cuboid structure.

6. The energy storage device of claim 1, wherein, The first connector is a plug, and the second connector is a socket.

7. The energy storage device according to any one of claims 1 to 6, wherein The housing comprises first and second side walls, and third and fourth side walls, and the first and second side walls are respectively provided with a handle for carrying the housing and the battery module arranged in the housing.

8. The energy storage device of claim 7, wherein, The energy storage device further comprises a display assembly arranged on the first, second, third or fourth side wall of the housing of a battery pack located at a first position among the at least two battery packs stacked along the first direction, the display assembly being used to display battery information of the energy storage device.

9. The energy storage device of claim 7, wherein, The energy storage device further comprises a moving assembly arranged on the second side of the housing of a battery pack located at a second position among the at least two battery packs stacked along the first direction, and fixedly connected with the housing of the battery pack located at the second position, the moving assembly being used to move the energy storage device.

10. The energy storage device of claim 9, wherein, The moving assembly comprises first and second connecting blocks and four groups of universal wheels, the first and second connecting blocks are fixedly installed on the second side of the housing of the battery pack located at the second position, two groups of universal wheels among the four groups of universal wheels are respectively fixedly installed on the first and second ends of the first connecting block, and the other two groups of universal wheels are respectively fixedly installed on the first and second ends of the second connecting block.

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