An energy storage container system

Abstract

The utility model provides a kind of energy storage container system, including the lower energy storage container unit and upper energy storage container unit of laminated arrangement, the upper portion of lower energy storage container unit is provided with multiple first connecting pieces, the lower portion of upper energy storage container unit is provided with the second connecting piece corresponding with first connecting piece one by one;Multiple connecting units, corresponding first connecting piece and second connecting piece are connected by at least one connecting unit;Each connecting unit includes connecting body and at least two locking assemblies, at least one locking assembly is connected to first connecting piece and connecting body, and first connecting piece is locked with connecting body;At least one locking assembly is connected to second connecting piece and connecting body, and second connecting piece is locked with connecting body.Connecting unit connects the energy storage container unit of upper and lower laminated arrangement, and then improve the anti-seismic, wind resistance of upper energy storage container unit.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an energy storage container system. Background Technology

[0002] A containerized energy storage unit is a device used to store electrical energy. It is usually modularly designed in the form of a container and has a wide range of applications, including renewable energy integration, grid regulation, emergency power, electric vehicle charging stations, industrial applications, and microgrids.

[0003] The application scenarios of energy storage container units are usually modularly arranged on the ground. A single energy storage container unit occupies a large area. In situations where space is limited or special scenarios, multiple energy storage container units need to be overlapped. After being overlapped, the overall center of gravity of the energy storage container unit is relatively high, which reduces its earthquake resistance and wind load resistance. Summary of the Invention

[0004] This invention provides an energy storage container system to solve the technical problems of the upper energy storage container unit having a high center of gravity and poor earthquake and wind resistance after overlapping use of energy storage container units.

[0005] This utility model provides an energy storage container system, comprising: The lower energy storage container unit and the upper energy storage container unit are stacked together. The upper part of the lower energy storage container unit is provided with a plurality of first connectors, and the lower part of the upper energy storage container unit is provided with second connectors that correspond one-to-one with the first connectors. Multiple connection units, wherein the first connector and the second connector are connected by at least one of the connection units; Each of the connecting units includes a connecting body and at least two locking components, at least one of the locking components being connected to the first connecting member and the connecting body and locking the first connecting member to the connecting body; at least one of the locking components being connected to the second connecting member and the connecting body and locking the second connecting member to the connecting body.

[0006] In one embodiment of the present invention, both the lower energy storage container unit and the upper energy storage container unit are rectangular structures. The first connecting member is a first corner piece fixed to the top four corners of the lower energy storage container unit, and the second connecting member is a second corner piece fixed to the bottom four corners of the upper energy storage container unit. The second corner piece is supported on the first corner piece, and the connecting body is connected to the sides of the first corner piece and the second corner piece through the locking assembly.

[0007] In one embodiment of this utility model, the first corner piece and the second corner piece have hollow inner cavities, and connecting holes are provided on the same side of both the first corner piece and the second corner piece; the connecting body includes a first connecting plate with a through hole; the locking assembly includes a locking member and a first nut; the locking member includes a screw and a limiting head connected to the end of the screw; the limiting head extends into the inner cavity after passing through the connecting hole; the screw passes through the through hole of the first connecting plate and is connected to the first nut; the limiting head has a rotatable first position and a second position; when the limiting head is in the first position, the limiting head can pass through the connecting hole and extend into the inner cavity; when the limiting head is in the second position, the limiting head is restricted from exiting the inner cavity by the first corner piece or the second corner piece.

[0008] In one embodiment of the present invention, the limiting head has a narrow side and a wide side. The size of the narrow side of the limiting head is smaller than the width of the connecting hole, and the size of the wide side of the limiting head is smaller than the length of the connecting hole, so that it can extend into the inner cavity through the connecting hole during connection. The size of the wide side of the limiting head is larger than the width of the connecting hole, so that the limiting head is restricted from exiting the inner cavity after connection.

[0009] In one embodiment of the present invention, the first corner piece and the second corner piece are provided with connecting holes on the same side. The connecting body includes a first connecting plate with through holes. The locking assembly includes a bolt and a connecting block. The connecting block is welded to the edge of the connecting hole and has threaded holes. The nut of the bolt presses against the first connecting plate, and the shank of the bolt passes through the through hole and connects to the threaded hole.

[0010] In one embodiment of the present invention, the first corner piece and the second corner piece each have a first side surface and a second side surface, the first side surface and the second side surface are adjacent and perpendicular; the first side surface of the first corner piece and the first side surface of the second corner piece are located on the same side, the second side surface of the first corner piece and the second side surface of the second corner piece are located on the same side, the connecting body further includes a folding portion connected to the first connecting plate, the first connecting plate presses on the first side surface and the first connecting plate is connected to the first side surface of the first corner piece and the second corner piece respectively through the locking assembly, and the folding portion presses on the second side surface.

[0011] In one embodiment of the present invention, the first corner piece and the second corner piece each have a first side surface and a second side surface, which are adjacent and perpendicular to each other; the first side surface of the first corner piece and the first side surface of the second corner piece are located on the same side, and the second side surface of the first corner piece and the second side surface of the second corner piece are located on the same side, and a connecting hole is provided on the second side surface. The connecting body further includes a second connecting plate that is perpendicularly connected to the first connecting plate. The first connecting plate is pressed on the first side surface and is connected to the first side surface of the first corner piece and the second corner piece respectively through the locking assembly. The second connecting plate is pressed on the second side surface and is connected to the second side surface of the first corner piece and the second corner piece respectively through the locking assembly.

[0012] In one embodiment of the present invention, the first connecting plate is simultaneously attached to the side of the first corner piece and the side of the second corner piece, and the edge of the first connecting plate has a flange facing away from the side of the first corner piece and the side of the second corner piece, the length direction of the flange being along the stacking direction of the lower energy storage container unit and the upper energy storage container unit.

[0013] In one embodiment of the present invention, the first corner piece and the second corner piece each have a first side surface and a second side surface, the first side surface and the second side surface are adjacent and perpendicular; the first side surface of the first corner piece and the first side surface of the second corner piece are located on the same side and are connected by one of the connecting units, and the second side surface of the first corner piece and the second side surface of the second corner piece are located on the same side and are connected by another connecting unit.

[0014] In one embodiment of this utility model, the connecting hole is an oblong hole.

[0015] The beneficial effects of this utility model are as follows: The energy storage container system proposed in this utility model connects the stacked energy storage container units through a connector and locking assembly, enabling interaction between the upper and lower energy storage container units, thereby improving the earthquake and wind resistance of the upper energy storage container unit. The connector structure of this utility model is reliable in strength, convenient to operate, and highly versatile, enabling the secure connection of two layers of energy storage container units to improve space utilization and reduce floor space. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram: Figure 1 A schematic diagram of the structure of an energy storage container system provided in an embodiment of this utility model; Figure 2 for Figure 1 Enlarged illustration of A in the middle Figure 1 ; Figure 3 for Figure 2 An explosion diagram; Figure 4 for Figure 1 Enlarged illustration of A in the middle Figure 2 ; Figure 5 for Figure 1 Enlarged illustration of A in the middle Figure 3 ; Figure 6 for Figure 5 Exploded view of the connecting unit in the middle; Figure 7 for Figure 1 Enlarged illustration of A in the middle Figure 4 ; Figure 8 for Figure 7 An explosion diagram after the bolts were added; Figure 9 This is an exploded view of a connecting unit in one embodiment; Figure 10 This is another exploded view of the connecting unit in one embodiment; Figure 11 for Figure 9 A sectional view; Figure 12 for Figure 8 A sectional view.

[0018] The attached figures are labeled as follows: The lower energy storage container unit 1 includes a first corner piece 11, a first side 111, a second side 112, an inner cavity 113, and a connecting hole 12. The upper energy storage container unit 2 includes a second corner piece 21, a connecting body 3, a first connecting plate 31, a second connecting plate 32, a flange 33, a through hole 34, a folding part 35, a locking assembly 4, a screw 41, a limit head 42, a first nut 43, a bolt 44, a second nut 45, a connecting block 46, and a threaded hole 47. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0022] Please see Figure 1 This utility model provides an energy storage container system, including a lower energy storage container unit 1 and an upper energy storage container unit 2, wherein the lower energy storage container unit 1 and the upper energy storage container unit 2 are stacked vertically. The upper part of the lower energy storage container unit 1 is provided with a plurality of first connecting members, and the lower part of the upper energy storage container unit 2 is provided with second connecting members corresponding to the first connecting members.

[0023] Multiple connection units are provided between the lower energy storage container unit 1 and the upper energy storage container unit 2. The corresponding second connection and the first connection are connected through at least one connection unit, thereby connecting the upper energy storage container unit 2 and the lower energy storage container unit 1 at multiple points, improving the earthquake resistance and wind resistance of the upper energy storage container unit 2.

[0024] In some embodiments, each connection unit includes a connector 3 and at least two locking components 4. At least one locking component 4 is connected to a first connector and a connector 3, locking the first connector to the connector 3, i.e., connecting the connector 3 to the lower energy storage container unit 1. At least one locking component 4 is connected to a second connector and a connector 3, locking the second connector to the connector 3, i.e., connecting the connector 3 to the upper energy storage container unit 2. The two stacked energy storage container units are simultaneously connected to the connector 3 through corresponding locking components, thereby binding the two adjacent energy storage container units on the upper and lower layers together, enhancing the stability of the upper energy storage container unit 2, and improving the earthquake and wind resistance of the entire energy storage container system.

[0025] In other embodiments, the energy storage container system includes multiple layers of stacked energy storage container units, with adjacent layers of energy storage container units connected by multiple connecting units; the corresponding first and second connecting members can be connected by one or two connecting units, and when connected by two connecting units, it is more stable.

[0026] In some embodiments, the first connector is connected to the connector body 3 via two or more sets of locking components 4, and the second connector is connected to the connector body 3 via two or more sets of locking components 4, thereby further improving the connection stability between the connector body and the energy storage container unit.

[0027] In some embodiments, both the lower energy storage container unit 1 and the upper energy storage container unit 2 are rectangular structures. The first connecting member is a first corner piece 11 fixed at the top four corners of the lower energy storage container unit 1, and the second connecting member is a second corner piece 21 fixed at the bottom four corners of the upper energy storage container unit 2. The second corner piece 21 is supported on the first corner piece 11, thereby making full use of the original structure of the energy storage container unit and reducing modifications and costs.

[0028] The first corner piece 11 and the second corner piece 21 each have a hollow inner cavity 113, and connecting holes 12 are provided on the same side of both corner pieces 11 and 21. Existing standard parts can be used for the first corner pieces 11 and 21, which have three sides that do not contact the energy storage container unit. Connecting holes 12 are provided on the three sides of the first corner piece 11 and the three sides of the second corner piece 21, and each connecting hole 12 communicates with the inner cavity 113. For ease of installation, corner pieces are typically installed on all eight corners of each energy storage container unit, allowing any one of the energy storage container units to serve as either the lower or upper layer during assembly, thus improving versatility.

[0029] After the energy storage container units are stacked, the second corner piece 21 of the upper energy storage container unit 2 and the first corner piece 11 of the lower energy storage container unit 1 each have two vertical surfaces on the outside. That is, the first corner piece 11 and the second corner piece 21 each have a first side 111 and a second side 112, which are adjacent and perpendicular to each other. The first side 111 of the first corner piece 11 and the first side 111 of the second corner piece 21 are on the same side, and the second side 112 of the first corner piece 11 and the second side 112 of the second corner piece 21 are on the same side. The connecting hole 12 is provided on both the first side 111 and the second side 112.

[0030] The connecting unit can connect the first side surface 111 of the first corner piece 11 to the first side surface 111 of the second corner piece 21, such as... Figure 2 and Figure 3 As shown; or the second side 112 of the first corner piece 11 is connected to the second side 112 of the second corner piece 21; or the first side 111 of the first corner piece 11 is connected to the first side 111 of the second corner piece 21, and the second side 112 of the first corner piece 11 is connected to the second side 112 of the second corner piece 21 through another connecting unit, as shown. Figure 4 As shown, the upper energy storage container unit 2 is connected to the lower energy storage container unit 1 in two directions, making the connection of the upper energy storage container unit 2 more robust and improving its earthquake and wind resistance.

[0031] In some embodiments, such as Figure 5 and Figure 6 As shown, the connector 3 includes a first connecting plate 31, which is attached to the sides of the first corner piece 11 and the second corner piece 21. After the first connecting plate 31 is attached to the first corner piece 11 and the second corner piece 21, the locking assembly 4 locks the first connecting plate 31 to the first corner piece 11 and the second corner piece 21 respectively.

[0032] In some embodiments, such as Figure 7 and Figure 8 As shown, the connecting body 3 also includes a second connecting plate 32, which is connected to and perpendicular to the first connecting plate 31. The first connecting plate 31 is attached to the first side 111 of the first corner piece 11 and the second corner piece 21, and the second connecting plate 32 is attached to the second side 112 of the first corner piece 11 and the second corner piece 21. The second connecting plate 32 and the first connecting plate 31 are arranged perpendicularly to form an L-shape. The first connecting plate 31 is connected to the connecting hole 12 on the first side by a locking assembly 4, and the second connecting plate 32 is also connected to the connecting hole 12 on the second side by a locking assembly 4. Thus, the two sides of the second corner piece 21 of the upper energy storage container unit 2 are connected to the lower energy storage container unit 1, resulting in higher stability.

[0033] In some embodiments, to increase the strength of the first connecting plate 31, a flange 33 is provided on the side of the first connecting plate 31, and the flange 33 is folded in the direction opposite to the energy storage container unit of the first connecting plate 31. Figure 3 As shown, the flanges 33 are disposed on the left and right sides of the first connecting plate 31, that is, the length direction of the flanges 33 is along the stacking direction of the energy storage container units. Because the upper energy storage container unit 2 may sway under the action of external forces, the flanges 33 disposed along the stacking direction can strengthen the strength of the first connecting plate 31.

[0034] In some embodiments, a flange 33 is provided on one side edge of the first connecting plate 31, and the flange 33 and the first connecting plate 31 form an L-shape; or flanges 33 are provided on both opposite sides of the first connecting plate 31 (left and right sides in the figure), and the first connecting plate 31 and the flange 33 form a U-shape; or flanges 33 are provided on all four sides of the first connecting plate 31.

[0035] In some embodiments, such as Figure 10 As shown, the connecting body 3 also includes a folding portion 35 connected to the first connecting plate 31. The first connecting plate 31 presses against the first side surface 111, and the folding portion 35 presses against the second side surface 112. The folding portion 35 extends from the first connecting plate 31 along the length or width direction of the energy storage container unit. That is, the first connecting plate 31 is in contact with the first side surface 111, and the folding portion 35 folds towards the second side surface 112 and is in contact with it. The folding portion 35 and the second side surface 112 are not connected by a locking assembly 4. The folding portion 35 can enhance the strength of the first connecting plate 31. The first connecting plate 31 can reduce the relative sway between the upper and lower energy storage container units in the first direction, while the folding portion 35 can reduce the relative sway between the upper and lower energy storage container units in the second direction. The first direction and the second direction are two perpendicular directions. Through constraints in different directions, the seismic and wind resistance is further improved.

[0036] In some embodiments, such as Figure 8 and Figure 12 As shown, the locking assembly 4 includes a bolt 44 and a connecting block 46. The connecting block 46 fills the connecting hole 12 and is fixedly connected to the energy storage container unit. The connecting block 46 has a threaded hole 47 for the bolt 44 to pass through. The nut of the bolt 44 presses against the first connecting plate 31, and the shank of the bolt 44 passes through the hole and connects to the threaded hole 47, as shown. Figure 8 As shown, when the connecting body 3 connects the first corner piece 11 and the second corner piece 21 from two sides through the first connecting plate 31 and the second connecting plate 32, the installation of the bolt 44 is more convenient.

[0037] In some embodiments, the shape of the connecting block 46 matches the shape of the connecting hole 12, and then the connecting block 46 is welded to the first corner piece 11 and the second corner piece 21 by plug welding. The outer surface of the connecting block 46 is flush with the outer surface of the corner piece. After the connecting block 46 is fixed to the first corner piece 11 and the second corner piece 21, the first connecting plate 31 can fit against the first side 111 of the first corner piece 11 and the second corner piece 21, minimizing the gap between the first connecting plate 31 and the first corner piece 11 and the second corner piece 21, thereby making the connection of the upper energy storage container unit 2 more secure.

[0038] Multiple through holes 34 are provided on the first connecting plate 31. The locking component 4 can be connected to the connecting body 3 by welding. For convenient and efficient connection, the locking component 4 and the connecting body 3 are detachably connected.

[0039] In some embodiments, the locking assembly 4 further includes a second nut 45, eliminating the need for a threaded hole in the connecting block 46. The connecting block 46 is connected to the connecting body 3 by a bolt 44. The connecting block 46 has a through hole for the bolt 44 to pass through, and the nut of the bolt 44 is located in the inner cavity 113. Figure 5 As shown. The shank of bolt 44 passes through the through hole and the bore and is connected to the second nut 45, that is, the second nut 45 is located on the side of the first connecting plate 31 facing away from the energy storage container unit.

[0040] Alternatively, the second nut 45 can be located on the side of the connecting block 46 away from the first connecting plate 31 and within the inner cavity 113. The nut of the bolt 44 presses against the first connecting plate 31, and the shank of the bolt 44 passes through the through hole 34 and the through hole in sequence before connecting to the second nut 45. The second nut 45 can be welded to the connecting block 46, so that the first connecting plate 31 can be locked simply by rotating the bolt 44.

[0041] In some embodiments, such as Figure 9 and Figure 10 As shown, the locking assembly 4 includes a locking member and a first nut 43. The locking member includes a screw 41 and a limiting head 42 connected to the end of the screw 41. The screw 41 passes through the connecting hole 12, and the limiting head 42 is disposed at one end of the screw 41. The other end of the screw 41 is connected to the connecting body 3. After passing through the connecting hole 12, the limiting head 42 extends into the inner cavity 113. By restricting the limiting head 42 from exiting the inner cavity 113, the first connecting plate 31 is locked. After passing through the through hole of the first connecting plate 31, the screw 41 is connected to the first nut 43.

[0042] The limiting head 42 has a rotatable first position and a second position. When the limiting head 42 is in the first position, it can pass through the connecting hole 12 and extend into the inner cavity 113. When the limiting head 42 is in the second position, it is restricted from exiting the inner cavity 113 by the first corner piece 11 or the second corner piece 21. When the limiting head 42 is in the second position, along the length direction of the screw 41, the projection of the limiting head 42 at least partially coincides with the edge of the connecting hole 12, thereby locking the limiting head 42 inside the connecting hole 12. The connecting body 3 is connected to the first corner piece 11 and the second corner piece 21 by the cooperation of the limiting head 42 with the connecting hole 12.

[0043] In some embodiments, the connecting holes 12 on the first corner piece 11 and the second corner piece 21 are configured as oblong holes, and the limiting head 42 is also configured as a strip-shaped block. The limiting head 42 has a narrow side and a wide side. The size of the narrow side of the limiting head 42 is smaller than the width of the connecting hole 12, and the size of the wide side of the limiting head 42 is smaller than the length of the connecting hole 12. Therefore, the limiting head 42 can extend into the inner cavity 113 from the outside through the connecting hole 12. The size of the wide side of the limiting head 42 is larger than the width of the connecting hole 12, so that after the limiting head 42 rotates at a certain angle, it is restricted from exiting the inner cavity 113 after connection.

[0044] When connecting the connector 3 to the first corner piece 11 and the second corner piece 21, first align the wide side of the limiting head 42 with the length direction of the connecting hole 12 and the narrow side with the width direction of the connecting hole 12, so that the limiting head 42 is in the first position. Insert the limiting head 42 from the outside in through the connecting hole 12 into the inner cavity 113. Then rotate the screw 41 to rotate the limiting head 42 by a certain angle, preferably 90°, so that the wide side of the limiting head 42 is flush with the width direction of the connecting hole 12. Since the width of the connecting hole 12 is less than the length of the limiting head 42, the limiting head 42 cannot be directly detached from the connecting hole 12. After the limiting head 42 extends into the inner cavity 113 from the first side 111 of the corner piece, clamp the limiting head 42 from the second side 112 of the corner piece using a tooling. The end of the screw 41 away from the limiting head 42 passes through the through hole on the first connecting plate 31 and connects to the first nut 43.

[0045] The locking assembly 4 between the connector 3 and the upper energy storage container unit 2 can have the same or different structure as the locking assembly 4 between the connector 3 and the lower energy storage container unit 1.

[0046] In some embodiments, to facilitate the quick passage of the limiting head 42 through the connecting hole 12, a guide structure is provided on the limiting head 42 for guiding it when it passes through the connecting hole 12. The guide structure is located on the side of the limiting head 42 away from the screw 41. When the limiting head 42 passes through the connecting hole 12, the guide structure first contacts the connecting hole 12. Figure 9 and Figure 10As shown, the guide structure is an inclined surface set on the limiting head 42. Two inclined surfaces are set on the limiting head 42, that is, the limiting head 42 is not a regular rectangle, but a shape similar to a trapezoid.

[0047] In some embodiments, two through holes are respectively provided at the first corner piece 11 and the second corner piece 21 of the connector 3, that is, four through holes are provided on the first connecting plate 31, and four sets of locking components are provided accordingly, such as Figure 8 As shown, during the shaking process, the four through holes and locking components of the upper energy storage container unit 2 are arranged along the vertical stacking direction, which can enhance the connection strength of the upper energy storage container unit 2.

[0048] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An energy storage container system, characterized in that, include: The lower energy storage container unit and the upper energy storage container unit are stacked together. The upper part of the lower energy storage container unit is provided with a plurality of first connectors, and the lower part of the upper energy storage container unit is provided with second connectors that correspond one-to-one with the first connectors. Multiple connection units, wherein the first connector and the second connector are connected by at least one of the connection units; Each of the connecting units includes a connecting body and at least two locking components, at least one of the locking components being connected to the first connecting member and the connecting body and locking the first connecting member to the connecting body; at least one of the locking components being connected to the second connecting member and the connecting body and locking the second connecting member to the connecting body.

2. The energy storage container system according to claim 1, characterized in that, Both the lower and upper energy storage container units are rectangular structures. The first connecting member is a first corner piece fixed to the top four corners of the lower energy storage container unit, and the second connecting member is a second corner piece fixed to the bottom four corners of the upper energy storage container unit. The second corner piece is supported on the first corner piece, and the connecting body is connected to the sides of the first and second corner pieces through the locking assembly.

3. The energy storage container system according to claim 2, characterized in that, The first corner piece and the second corner piece have hollow inner cavities, and both the first corner piece and the second corner piece have connecting holes on the same side; the connecting body includes a first connecting plate with a through hole; the locking assembly includes a locking member and a first nut; the locking member includes a screw and a limiting head connected to the end of the screw; the limiting head extends into the inner cavity after passing through the connecting hole; the screw passes through the through hole of the first connecting plate and is connected to the first nut; the limiting head has a rotatable first position and a second position; when the limiting head is in the first position, the limiting head can pass through the connecting hole and extend into the inner cavity; when the limiting head is in the second position, the limiting head is restricted from exiting the inner cavity by the first corner piece or the second corner piece.

4. The energy storage container system according to claim 3, characterized in that, The limiting head has a narrow side and a wide side. The size of the narrow side of the limiting head is smaller than the width of the connecting hole, and the size of the wide side of the limiting head is smaller than the length of the connecting hole, so that it can extend into the inner cavity through the connecting hole during connection. The size of the wide side of the limiting head is larger than the width of the connecting hole, so that the limiting head can be restricted from exiting the inner cavity after connection.

5. The energy storage container system according to claim 2, characterized in that, Both the first corner piece and the second corner piece have connecting holes on the same side. The connecting body includes a first connecting plate with through holes. The locking assembly includes a bolt and a connecting block. The connecting block is welded to the edge of the connecting hole and has threaded holes. The nut of the bolt presses against the first connecting plate, and the shank of the bolt passes through the through hole and connects to the threaded hole.

6. The energy storage container system according to any one of claims 3-5, characterized in that, The first corner piece and the second corner piece each have a first side and a second side, which are adjacent and perpendicular to each other; the first side of the first corner piece and the first side of the second corner piece are on the same side, and the second side of the first corner piece and the second side of the second corner piece are on the same side. The connecting body also includes a folding part connected to the first connecting plate. The first connecting plate presses on the first side and is connected to the first side of the first corner piece and the second corner piece respectively through the locking assembly. The folding part presses on the second side.

7. The energy storage container system according to claim 5, characterized in that, The first corner piece and the second corner piece each have a first side and a second side, which are adjacent and perpendicular to each other. The first side of the first corner piece and the first side of the second corner piece are on the same side, and the second side of the first corner piece and the second side of the second corner piece are on the same side. A connecting hole is provided on the second side. The connecting body also includes a second connecting plate that is perpendicularly connected to the first connecting plate. The first connecting plate presses on the first side and is connected to the first side of the first corner piece and the second corner piece respectively through the locking assembly. The second connecting plate presses on the second side and is connected to the second side of the first corner piece and the second corner piece respectively through the locking assembly.

8. The energy storage container system according to any one of claims 3-5, characterized in that, The first connecting plate is simultaneously attached to the side of the first corner piece and the side of the second corner piece. The edge of the first connecting plate has a flange facing away from the side of the first corner piece and the side of the second corner piece. The length direction of the flange is along the stacking direction of the lower energy storage container unit and the upper energy storage container unit.

9. The energy storage container system according to claim 5, characterized in that, Both the first corner piece and the second corner piece have a first side and a second side, which are adjacent and perpendicular to each other; the first side of the first corner piece and the first side of the second corner piece are located on the same side and are connected by one of the connecting units, and the second side of the first corner piece and the second side of the second corner piece are located on the same side and are connected by another connecting unit.

10. The energy storage container system according to any one of claims 3-5, characterized in that, The connecting hole is an oblong hole.

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