Energy storage device and energy storage system

Abstract

The application discloses an energy storage device and an energy storage system. The energy storage device comprises a plurality of bin bodies and a connecting assembly. The plurality of bin bodies are arranged in a stack along a first direction. Each bin body comprises a box body and a matching corner piece. The box body is internally provided with a containing cavity for placing a battery device. The matching corner piece is arranged on the outer peripheral wall of the box body. The matching corner piece is provided with a first positioning part. The connecting assembly comprises a connecting lock seat and a fixed connecting piece. The two ends of the connecting lock seat are both provided with a second positioning part. The second positioning parts at the two ends of the connecting lock seat are respectively inserted into the first positioning parts of the adjacent matching corner pieces. Each matching corner piece and the corresponding connecting lock seat are fixedly connected through the fixed connecting piece. Thus, the assembly process of the adjacent bin bodies is facilitated, and the stability of the assembly of the plurality of bin bodies can be improved.

Description

Technical Field

[0001] This invention relates to the field of storage technology, and more particularly to an energy storage device and energy storage system. Background Technology

[0002] In modern logistics, warehousing and transportation, warehouses are important tools for storing and transferring goods. They are usually stacked to reduce the space occupied by the warehouses. To ensure the reliability of the stacked warehouses, adjacent warehouses are usually assembled and locked together.

[0003] In related technologies, the assembly method of the silo is relatively complicated, and the stability of the silo after assembly needs to be improved. Summary of the Invention

[0004] This application proposes an energy storage device and energy storage system, in which the second positioning parts at both ends of the connecting lock seat are respectively inserted and engaged with the first positioning parts of the adjacent mating corner pieces. Each mating corner piece and the corresponding connecting lock seat are fixedly connected by a fixed connector, which simplifies the assembly process of adjacent compartments and improves the stability of multiple compartments after assembly.

[0005] In a first aspect, embodiments of this application provide an energy storage device, comprising: multiple compartments and a connecting assembly, the multiple compartments being stacked along a first direction, each compartment including a housing and a mating corner piece, the housing having a receiving cavity for placing a battery device, the mating corner piece being disposed on the outer peripheral wall of the housing, the mating corner piece having a first positioning part, the connecting assembly including a connecting lock seat and a fixing connector, both ends of the connecting lock seat having a second positioning part, the second positioning parts at both ends of the connecting lock seat respectively engaging with the first positioning part of the adjacent mating corner piece, each mating corner piece and the corresponding connecting lock seat being fixedly connected by the fixing connector.

[0006] In the above technical solution, the second positioning parts at both ends of the connecting lock seat are respectively inserted into the first positioning parts of the adjacent mating corner pieces, and the mating corner pieces are located on the outer peripheral wall of the housing, providing more operating space for the installation of the mating corner pieces and the connecting lock seat. Simultaneously, the insertion method simplifies the assembly process of adjacent compartments and improves the assembly efficiency of multiple compartments. Each mating corner piece and its corresponding connecting lock seat are connected by a fixed connector, making the assembly of adjacent compartments more stable and improving the stability of the compartments after stacking. Therefore, through the combined action of the mating corner pieces and the connecting components, the assembly process of adjacent compartments is simplified, and the stability of multiple compartments after assembly is improved.

[0007] In some embodiments, the first positioning part is a positioning cavity, and the second positioning part is a positioning protrusion, with the positioning protrusion located inside the positioning cavity.

[0008] In the above technical solution, by inserting the positioning protrusion into the positioning cavity, the mating area of ​​the mating corner piece and the connecting lock seat is increased, thereby improving the stability of the stacked compartments.

[0009] In some embodiments, the fixed connector fixes the corresponding mating corner piece and the second positioning part.

[0010] In the above technical solution, the second positioning part is fixed in the positioning cavity by a fixed connector, so that the fit between the connecting lock seat and the mating corner piece is more stable, which facilitates the improvement of the stability after multiple compartments are connected.

[0011] In some embodiments, the inner wall of the positioning cavity is provided with an insertion hole, and the end of the positioning protrusion is provided with a protrusion protruding therefrom, the protrusion being located in the insertion hole.

[0012] In the above technical solution, by setting the protrusion to engage with the insertion hole, the possibility of the positioning protrusion accidentally sliding or falling off in the positioning cavity is effectively reduced, while also simplifying the assembly process between adjacent compartments.

[0013] In some embodiments, the cross-sectional area of ​​the protrusion gradually decreases in the direction away from the positioning protrusion.

[0014] In the above technical solution, the cross-sectional area of ​​the part of the protrusion that mates with the insertion hole gradually increases as insertion continues, which reduces the positioning requirements of the protrusion and the insertion hole and simplifies the assembly process between adjacent compartments.

[0015] In some embodiments, the connecting lock seat further includes a clamping portion located between the second positioning portions at both ends, the clamping portion clamping between adjacent mating corner pieces.

[0016] In the above technical solution, the clamping part is located between adjacent mating corner pieces. The clamping part can support the adjacent mating corner pieces, which facilitates the distribution of pressure generated when the compartments are stacked, and enhances the structural stability of the mating corner pieces and connecting lock seat after assembly.

[0017] In some embodiments, the energy storage device further includes a foolproof part disposed on the clamping part and located on the outside of the adjacent mating corner piece, the foolproof part extending along a first direction.

[0018] In the above technical solution, the foolproof part extends along the first direction, that is, the foolproof part extends along the direction of stacking of the compartment. The design of the foolproof part makes it necessary to follow the extension direction of the foolproof part when assembling the mating corner pieces and connecting lock seats, which facilitates the improvement of assembly efficiency.

[0019] In some embodiments, the anti-mistake part is formed as a cylinder extending along a first direction.

[0020] In the above technical solution, the anti-foolproof part has a relatively regular cylindrical structure, which is easy to process and shape, and can improve the processing efficiency of the connecting lock seat.

[0021] In some embodiments, the mating corner piece includes an end plate and a surrounding plate. The surrounding plate has end plates at both ends in a first direction. The end plates and the surrounding plate define a positioning cavity. One of the end plates has an opening. A positioning protrusion extends into the positioning cavity through the opening. A clamping part clamps between adjacent end plates.

[0022] In the above technical solution, the mating corner piece defines the positioning cavity through the end plate and the surrounding plate, so that the mating corner piece has good structural strength. One of the end plates is provided with an opening to facilitate the positioning protrusion to cooperate with the positioning cavity. At the same time, the structure of the mating corner piece is relatively simple and easy to process and manufacture. The clamping part can support the adjacent end plates, which helps to improve the service life of the mating corner piece.

[0023] In some embodiments, the connecting lock seat includes a guide surface, which is connected to the clamping part and the second positioning part respectively. The guide surface is formed as an inclined surface and mates with the opening.

[0024] In the above technical solution, the inclined guide surface can play a guiding role, so that the positioning protrusion can pass through the opening and enter the positioning cavity more easily. At the same time, the inclined surface design can also compensate for minor errors in the manufacturing or assembly process to a certain extent, and improve the adaptability of connecting lock seat and mating corner piece assembly.

[0025] In some embodiments, the energy storage device further includes a connector, which is disposed on the outside of two adjacent mating corner pieces, and a fixed connector passes through the connector, the mating corner pieces and is fixedly connected to the connecting lock seat.

[0026] In the above technical solution, the connecting component can effectively protect the connection between the mating corner piece and the connecting lock seat, making it less susceptible to interference from the external environment and thus improving the service life of the mating corner piece and the connecting lock seat; the fixed connecting component passes through the connecting component, the mating corner piece and the connecting lock seat for fixed connection, so as to further improve the stability of the assembly of the mating corner piece and the connecting lock seat.

[0027] In some embodiments, the coupling includes a first part and a second part that intersect each other, and the first part and the second part are respectively fixedly engaged with the adjacent sidewalls of the mating corner piece by a fixed connector.

[0028] In the above technical solution, the first part and the second part of the connector are fixedly connected to the adjacent sidewalls of the mating corner piece through a fixed connector. This connection method significantly enhances the stability and rigidity of the entire structure and helps to improve the connector's ability to resist deformation or damage under external forces.

[0029] In some embodiments, the coupling is provided with a limiting member that extends into the mating corner member.

[0030] In the above technical solution, the limiting component can restrict the relative movement between the mating corner piece and the connecting piece, which helps to improve the stability of the fixed connection between the connecting piece, the mating corner piece and the connecting lock seat, thereby improving the stability when multiple compartments are stacked.

[0031] In some embodiments, the mating corner piece is provided with a first fixing hole that mates with the fixing connector, and the limiting member extends into the mating corner piece through the first fixing hole.

[0032] In the above technical solution, the limiting member can extend into the mating corner piece through the first fixing hole, which simplifies the positioning process between the mating corner piece and the connecting piece and facilitates the installation of the fixed connecting piece. At the same time, the limiting member can restrict the movement of the fixed connecting piece in the first fixing hole, thereby improving the stability of the fixed connection between the connecting piece, the mating corner piece and the connecting lock seat.

[0033] In some embodiments, the coupling member is provided with a second fixing hole that mates with the fixing member, and at least a portion of the limiting member is disposed around the second fixing hole.

[0034] In the above technical solution, the limiting member is at least partially arranged around the second fixing hole. The limiting member is adapted to extend into the mating corner member. The assembly between the limiting member and the mating corner member simplifies the positioning process between the connecting member and the mating corner member and facilitates the installation and fixing of the connecting member.

[0035] Secondly, embodiments of this application provide an energy storage system, including the energy storage device of the first aspect.

[0036] In the above technical solution, the energy storage device has good stability, which makes the energy storage device supply power to the energy storage system more stable and facilitates the improvement of the stability of the energy storage system. Attached Figure Description

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0038] Figure 1 This is a schematic diagram of the battery pack proposed in an embodiment of the present invention;

[0039] Figure 2 This is an assembly diagram of the compartment body and mating corner pieces proposed in an embodiment of the present invention;

[0040] Figure 3 for Figure 2 A schematic diagram of the mating corner piece shown;

[0041] Figure 4 This is a schematic diagram of the connecting lock seat proposed in an embodiment of the present invention;

[0042] Figure 5 for Figure 4Another angle view of the connecting lock seat shown;

[0043] Figure 6 for Figure 4 Another angle view of the connecting lock seat shown;

[0044] Figure 7 This is an assembly diagram of the connecting components and mating corner pieces proposed in an embodiment of the present invention;

[0045] Figure 8 This is an assembly diagram of the connecting components and couplings proposed in an embodiment of the present invention;

[0046] Figure 9 for Figure 8 Another angle assembly diagram of the connecting components and connectors shown;

[0047] Figure 10 for Figure 8 Another angle assembly diagram of the connecting components and connectors shown;

[0048] Figure 11 for Figure 10 The AA section view shown;

[0049] Figure 12 This is an assembly diagram of the connecting components, mating corner pieces, and connecting pieces proposed in an embodiment of the present invention;

[0050] Figure 13 for Figure 11 Another assembly diagram of the connecting components, mating corner pieces, and couplings shown in the diagram;

[0051] Figure 14 for Figure 13 The BB cross-sectional view shown;

[0052] Figure 15 for Figure 12 Another angle assembly diagram of the connecting components, mating corner pieces, and couplings shown in the diagram;

[0053] Figure 16 This is a schematic diagram of the energy storage system proposed in an embodiment of the present invention.

[0054] Reference numerals: Energy storage device 1, Energy storage system 2, Chamber 10, Receiving cavity 11, Box 12, Mating corner piece 14, First positioning part 140, Positioning cavity 142, Insertion hole 142a, End plate 144, Opening 144a, Enclosure plate 146, First fixing hole 148, Connecting assembly 20, Connecting lock seat 22, Second positioning part 220, Positioning protrusion 222, Protrusion 222a, Clamping part 224, Guide surface 226, Fixed connector 24, Foolproof part 30, Connecting part 40, First part 42, Second part 44, Limiting part 46, Second fixing hole 48, Battery device 50, Battery cell 60, Receiving box 70, First sub-box 72, Second sub-box 74. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0057] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0060] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the dimensions of the various components shown in the accompanying drawings in the embodiments of this application are merely illustrative and should not constitute any limitation on this application.

[0061] In this application, "multiple" means two or more (including two).

[0062] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. Multiple battery cells in the battery device can be connected in series, parallel, or mixed via a busbar. For example, the battery device may consist of multiple battery cells arranged and fixed to form an independent module; as an example, the battery device can be formed by bundling multiple battery cells together with cable ties. As an example, the battery device can also be housed in a housing by directly fixing multiple battery cells to a housing box. That is, the battery device can be a battery module or a battery pack.

[0063] As an example, the housing may include a first sub-unit and a second sub-unit. The first and second sub-units are fastened together to form a closed space inside the housing for storing individual battery cells; here, "closed" refers to covering or shutting off, and can be sealed or unsealed; the first sub-unit may be a top cover or a bottom plate. As an example, the housing may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, so that the interior of the housing forms a closed space for storing individual battery cells.

[0064] In this application, a battery cell may include a secondary battery, a primary battery, etc. A secondary battery refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. Battery cells may be lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, sodium lithium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application does not limit the types. Battery cells may be cylindrical, flat, cuboid, or other shapes, and this application does not limit the shapes either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application does not limit the types either.

[0065] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0066] The positive electrode generally includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer. The positive current collector without the positive active material layer serves as a positive electrode tab. Multiple positive electrode tabs are stacked together and form an electrical connection with the positive electrode post. For example, the multiple stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; or, the battery cell assembly can also include a positive electrode adapter piece. The multiple stacked positive electrode tabs are soldered to one end of the positive electrode adapter piece, and the other end of the positive electrode adapter piece is soldered to the positive electrode post, so that the positive electrode tabs and the positive electrode post form an electrical connection.

[0067] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer. The negative current collector without the negative active material layer serves as a negative electrode tab. Multiple negative electrode tabs are stacked together and form an electrical connection with the negative electrode post. For example, the stacked negative electrode tabs can be directly welded to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece. The stacked negative electrode tabs are welded to one end of the negative electrode adapter piece, and the other end of the negative electrode adapter piece is welded to the negative electrode post, so that the negative electrode tabs and the negative electrode post form an electrical connection. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0068] Currently, with the rapid development of energy storage technology, especially the continuous upgrading and iteration of large-cell technology, the energy density of battery devices is constantly increasing. To facilitate the transportation and storage of battery devices, multiple battery devices can be placed in a storage unit for transport and storage. During storage and transportation, storage units are usually stacked to reduce their footprint. To ensure the reliability of the stacked storage units, adjacent units typically need to be assembled and locked together. However, the assembly methods for these storage units are relatively complex, and the stability of the assembled units needs further improvement.

[0069] Based on the above considerations, in order to better solve the reliability problem of the stacked configuration of the storage compartments, this application proposes an energy storage device. The energy storage device includes multiple storage compartments and a connecting assembly. The multiple storage compartments are stacked along a first direction. Each storage compartment includes a housing and a mating corner piece. The housing has a cavity for placing a battery device. The mating corner piece is located on the outer peripheral wall of the housing and has a first positioning part. The connecting assembly includes a connecting lock seat and a fixing connector. Both ends of the connecting lock seat have second positioning parts. The second positioning parts at both ends of the connecting lock seat are respectively inserted and engaged with the first positioning parts of the adjacent mating corner piece. Each mating corner piece and the corresponding connecting lock seat are fixedly connected by the fixing connector.

[0070] In the above technical solution, the second positioning parts at both ends of the connecting lock seat are respectively inserted into the first positioning parts of the adjacent mating corner pieces, and the mating corner pieces are located on the outer peripheral wall of the housing, providing more operating space for the installation of the mating corner pieces and the connecting lock seat. Simultaneously, the insertion method simplifies the assembly process of adjacent compartments and improves the assembly efficiency of multiple compartments. Each mating corner piece and its corresponding connecting lock seat are connected by a fixed connector, making the assembly of adjacent compartments more stable and improving the stability of the compartments after stacking. Therefore, through the combined action of the mating corner pieces and the connecting components, the assembly process of adjacent compartments is simplified, and the stability of multiple compartments after assembly is improved.

[0071] For ease of explanation, the following embodiments provide a detailed description of the structure of the battery device 50 and the battery cell 60 of this application.

[0072] Please refer to Figure 1 , Figure 1 This is an exploded view of the structure of a battery cell 60 used in a battery device 50 according to some embodiments of this application. The battery device 50 includes a housing 70 and a plurality of battery cells 60, with the battery cells 60 housed within the housing 70. The housing 70 provides assembly space for the battery cells 60 and can employ various structures. In some embodiments, the housing 70 may include a first sub-housing 72 and a second sub-housing 74, which overlap each other, jointly defining a receiving cavity for accommodating the battery cells 60. The second sub-housing 74 may be a hollow structure open at one end, and the first sub-housing 72 may be a plate-like structure, covering the open side of the second sub-housing 74 so that the first sub-housing 72 and the second sub-housing 74 jointly define the receiving cavity; alternatively, the first sub-housing 72 and the second sub-housing 74 may both be hollow structures open on one side (e.g., Figure 1 As shown), the open side of the first sub-box 72 closes to the open side of the second sub-box 74. Of course, the container 70 formed by the first sub-box 72 and the second sub-box 74 can be of various shapes, such as a cylinder or a cuboid.

[0073] In the battery device 50, multiple battery cells 60 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that some of the battery cells 60 are connected in series while others are connected in parallel. Multiple battery cells 60 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 60 is housed within a housing 70 to form the battery device 50. The battery device 50 may also include other structures; for example, it may include a busbar for electrical connection between the multiple battery cells 60.

[0074] Please refer to Figure 2 , Figure 3 and Figure 7 As shown in the embodiments of this application, the energy storage device 1 includes: a plurality of compartments 10 and a connecting assembly 20. The plurality of compartments 10 are stacked along a first direction. Each compartment 10 includes a housing 12 and a mating corner piece 14. The housing 12 is provided with a receiving cavity 11 for placing a battery device 50. The mating corner piece 14 is provided on the outer peripheral wall of the housing 12 and is provided with a first positioning part 140. The connecting assembly 20 includes a connecting lock seat 22 and a fixing connector 24. Both ends of the connecting lock seat 22 are provided with second positioning parts 220. The second positioning parts 220 at both ends of the connecting lock seat 22 are respectively inserted and engaged with the first positioning parts 140 of the adjacent mating corner piece 14. Each mating corner piece 14 and the corresponding connecting lock seat 22 are fixedly connected by the fixing connector 24.

[0075] As can be seen, multiple compartments 10 are along the first direction (e.g. Figure 2 The battery pack 10 is stacked in the AA' direction to reduce the space occupied by the pack 10 in other directions, facilitating its transfer and storage. The pack 12 has a cavity 11 for housing the battery device 50, providing a relatively sealed environment to prevent damage during transfer and storage, thus improving the reliability of the pack 10. It is understood that when the battery device 50 is placed in the cavity 11 of the pack 10, it may or may not include a housing box 70; the pack 10 can be a container or a cabinet, and the battery device 50 is placed inside the container or cabinet for transfer or storage.

[0076] The dimensions of the storage body 10 can be those of a standard container or a non-standard container. For example, the height of the storage body 10 may be less than that of a standard container, and the length and width of the storage body 10 may be the same as those of a standard container.

[0077] Furthermore, the corner fitting 14 is located on the outer peripheral wall of the housing 12, providing a larger operating space for the insertion and engagement of the corner fitting 14 and the connecting lock seat 22. This makes it less likely for the housing 12 to interfere with the assembly of the corner fitting 14 and the connecting lock seat 22, thus improving the assembly efficiency of adjacent compartments 10. Moreover, the second positioning portions 220 at both ends of the connecting lock seat 22 are respectively inserted and engaged with the first positioning portions 140 of the adjacent corner fitting 14. By assembling adjacent compartments 10 through insertion and engagement, the assembly process of adjacent compartments 10 is simplified, allowing workers to complete the stacking of compartments 10 without performing complex operations, effectively improving the assembly efficiency of adjacent compartments 10.

[0078] Each mating corner piece 14 and its corresponding connecting lock seat 22 are connected by a fixing connector 24, which makes the assembly of adjacent compartments 10 more stable. This improves the stability of the compartments 10 after stacking, reduces the possibility of the compartments 10 loosening or collapsing due to vibration, collision, or other factors during transportation or storage, and further ensures the safety of the objects inside the compartments 10. Furthermore, when it is necessary to separate the stacked compartments 10, simply releasing the fixing connector 24 allows for easy separation of adjacent compartments 10 without the need for complex tools or excessive force. This is of great significance for quickly responding to changes in logistics needs and flexibly adjusting the warehouse layout.

[0079] For example, multiple compartments 10 are stacked vertically. Each compartment 10 includes a housing 12 and multiple mating corner pieces 14. The multiple mating corner pieces 14 are fixed (e.g., welded) to the upper and lower sides of the housing 12, and each mating corner piece 14 is located at one of the four corners of the upper and lower sides. The operator can first align and insert the mating corner pieces 14 of the lower compartment 10 with the connecting lock seat 22, then align and insert the mating corner pieces 14 of the upper compartment 10 with the connecting lock seat 22, and finally fix the mating corner pieces 14 of different compartments 10 to the same connecting lock seat 22 through the fixing connector 24. This improves the stability of the compartments 10 after stacking, so that the battery device 50 is more stable and less prone to damage during transportation and storage.

[0080] It is understood that the storage body 10 can have multiple mating corner pieces 14, and the multiple mating corner pieces 14 are connected to different connecting lock seats 22 respectively. By connecting adjacent storage bodies 10 at multiple points, it is easier to improve the structural strength of the stacked storage bodies 10, so that the storage bodies 10 are more stable during transportation and storage.

[0081] Optionally, the fixing connector 24 is configured to allow the mating corner piece 14 and the connecting lock seat 22 to be detachably installed. For example, the fixing connector 24 is a threaded fastener (such as a screw). This makes it easier to install and remove the mating corner piece 14 and the connecting lock seat 22, facilitating subsequent maintenance and repair, while also making the overall structure more compact and saving space.

[0082] Please refer to Figures 3-7 In some embodiments, the first positioning part 140 is a positioning cavity 142, and the second positioning part 220 is a positioning protrusion 222, with the positioning protrusion 222 located inside the positioning cavity 142.

[0083] As can be seen, by inserting the positioning protrusion 222 into the positioning cavity 142, the mating area of ​​the mating corner piece 14 and the connecting lock seat 22 is increased, thereby enhancing the connection strength between adjacent compartments 10. This helps to resist various external forces that may be encountered during transportation and storage, such as vibration and impact, and ensures the overall stability of the stacked structure of the compartments 10.

[0084] Please refer to Figures 3-7 As shown, in some embodiments, the fixed connector 24 fixes the corresponding mating corner piece 14 and the second positioning part 220. The fixed connector 24 can fix the positioning protrusion 222 in the positioning cavity 142, so that the fit between the connecting lock seat 22 and the mating corner piece 14 is more stable and less likely to loosen or separate due to external forces (such as vibration, wind, etc.). This can effectively prevent the warehouse body 10 from tilting, collapsing and other safety accidents during the stacking process, ensure the safety of personnel and goods, and effectively improve the stability of the stacked warehouse body 10 during the transfer and storage process.

[0085] Please refer to Figures 3-7 and Figure 14 As shown, in some embodiments, the inner wall of the positioning cavity 142 is provided with an insertion hole 142a, and the end of the positioning protrusion 222 is provided with a protrusion 222a protruding therefrom, the protrusion 222a being located in the insertion hole 142a.

[0086] As can be seen, the plug-in design of the protrusion 222a and the insertion hole 142a effectively restricts the degree of freedom of the positioning protrusion 222 in the positioning cavity 142, reduces the risk of the positioning protrusion 222 accidentally sliding or falling off when subjected to external force, enhances the stability of the connection lock seat 22 and the mating corner piece 14 assembly, and ensures the overall robustness of the stacked structure of the compartment 10.

[0087] In addition, the design of the protrusion 222a and the insertion hole 142a makes the assembly process more intuitive and simple. The operator only needs to align the protrusion 222a on the positioning protrusion 222 with the insertion hole 142a in the positioning cavity 142 and gently push it in to complete the initial connection. This simplifies the assembly process of the mating corner piece 14 and the connecting lock seat 22 and improves the assembly efficiency of adjacent compartments 10.

[0088] Please refer to Figures 4-7 and Figure 14In some embodiments, the cross-sectional area of ​​the protrusion 222a gradually decreases in the direction away from the positioning protrusion 222. As a result, the cross-sectional area of ​​the part of the protrusion 222a that mates with the insertion hole 142a gradually increases with each insertion, reducing the positioning requirements of the protrusion 222a and the insertion hole 142a. Even if the initial positioning of the protrusion 222a and the insertion hole 142a is not very precise, the protrusion 222a can gradually adapt and smoothly enter the insertion hole 142a, which simplifies the assembly process between adjacent compartments 10. At the same time, since the protrusion 222a can gradually adapt to the shape of the insertion hole 142a during the insertion process, even if there are small assembly errors, they are not likely to affect the correct assembly of the protrusion 222a and the insertion hole 142a, reducing connection instability caused by assembly errors.

[0089] Please refer to Figures 4-7 In some embodiments, the connecting lock seat 22 further includes a clamping portion 224 located between the second positioning portions 220 at both ends. The clamping portion 224 clamps between adjacent mating corner pieces 14, separating adjacent mating corner pieces 14. The clamping portion 224 can support adjacent mating corner pieces 14, improving the load-bearing capacity of the mating corner pieces 14. At the same time, the clamping portion 224 facilitates the distribution of pressure generated when the compartment 10 is stacked, reducing structural deformation or damage to the mating corner pieces 14 caused by excessive local pressure, and improving the service life of the mating corner pieces 14.

[0090] Please refer to Figures 3-6 , Figure 11 and Figure 12 In some embodiments, the energy storage device 1 further includes a foolproof part 30, which is disposed on the clamping part 224 and located on the outside of the adjacent mating corner piece 14, and extends along a first direction.

[0091] As can be seen, the foolproof part 30 extends along the first direction, and the compartment 10 is stacked along the first direction. That is, the foolproof part 30 extends along the stacking direction of the compartment 10. The design of the foolproof part 30 means that when assembling the mating corner piece 14 and the connecting lock seat 22, it must be done in the direction of extension of the foolproof part 30. When assembling in other directions, it will be blocked by the foolproof part 30, which effectively prevents incorrect operation during the assembly process, such as reverse installation or misalignment, thereby improving the accuracy of assembly. At the same time, due to the guiding effect of the foolproof part 30, the staff can identify the correct assembly direction more quickly, which facilitates the improvement of the assembly efficiency of the mating corner piece 14 and the connecting lock seat 22.

[0092] Furthermore, since the anti-mistake part 30 is located on the outside of the adjacent mating corner piece 14, there can be a certain distance between the anti-mistake part 30 and the mating corner piece 14, so that the anti-mistake part 30 is less likely to interfere with the assembly of the mating corner piece 14 and the connecting lock seat 22, making the assembly process of the mating corner piece 14 and the connecting lock seat 22 smoother.

[0093] Please refer to Figures 4-6 In some embodiments, the anti-mistake part 30 is formed as a cylinder extending along the first direction. The cylindrical structure of the anti-mistake part 30 is relatively regular, so that the processing of the anti-mistake part 30 is relatively simple and easy to control. Whether by casting, forging, machining or injection molding, the cylindrical anti-mistake part 30 can be produced efficiently, which helps to improve the production efficiency of the connecting lock seat 22 and reduce production costs.

[0094] Please refer to Figure 2 and Figure 3 In some embodiments, the mating corner piece 14 includes an end plate 144 and a surrounding plate 146. The surrounding plate 146 has end plates 144 at both ends in a first direction. The end plates 144 and the surrounding plate 146 define a positioning cavity 142. One of the end plates 144 has an opening 144a. The positioning protrusion 222 extends into the positioning cavity 142 through the opening 144a. The clamping part 224 is clamped between adjacent end plates 144.

[0095] As can be seen, the mating corner fitting 14 defines the positioning cavity 142 through the end plate 144 and the surrounding plate 146. The surrounding plate 146 supports the end plates 144 at both ends, giving the mating corner fitting 14 good structural strength and improving its service life. Simultaneously, one end plate 144 has an opening 144a through which the positioning protrusion 222 extends into the positioning cavity 142, simplifying the assembly process of the positioning protrusion 222 and the positioning cavity 142 and improving the assembly efficiency of adjacent compartments 10. Furthermore, the positioning cavity 142 is defined by the end plate 144 and the surrounding plate 146, making the structure of the mating corner fitting 14 relatively simple and easy to manufacture. In some examples of this application, one end plate 14 of the mating corner fitting 14 can be defined by the side wall of the housing 12 where the mating corner fitting 14 is located.

[0096] In addition, the clamping part 224 can support the adjacent end plate 144, which helps to disperse the pressure generated when the compartment 10 is stacked, so that the end plate 144 is not easily damaged under pressure, and thus improves the service life of the mating corner piece 14.

[0097] In other embodiments of this application, the mating corner piece 14 includes a surrounding plate 146, which defines a positioning cavity 142. The surrounding plate 146 has open ends at both ends in a first direction, through which a positioning protrusion 222 extends into the positioning cavity 142. This means the positioning protrusion 222 can extend into the positioning cavity 142 through the open end of either end of the surrounding plate 146 in the first direction, simplifying the assembly process of the positioning protrusion 222 and the positioning cavity 142. Furthermore, defining the positioning cavity 142 by the surrounding plate 146 further simplifies the structure of the mating corner piece 14, facilitating manufacturing and effectively improving production efficiency. The clamping portion 224 directly clamps between adjacent surrounding plates 146, helping to distribute the pressure generated when the storage units 10 are stacked, preventing damage to the surrounding plates 146 under pressure and extending the service life of the mating corner piece 14.

[0098] Please refer to Figures 4-7 In some embodiments, the connecting lock seat 22 includes a guide surface 226, which is connected to the clamping part 224 and the second positioning part 220 respectively. The guide surface 226 is formed as an inclined surface and cooperates with the opening 144a.

[0099] As can be seen, the inclined guide surface 226 can play a guiding role, guiding the positioning protrusion 222 through the opening 144a and into the positioning cavity 142, so that the assembly process of the positioning protrusion 222 and the positioning cavity 142 is smoother and the assembly efficiency is improved. At the same time, the inclined guide surface 226 can reduce the impact and friction during the assembly of the positioning protrusion 222 and the positioning cavity 142, thereby reducing the wear between parts, helping to extend the service life of the connecting lock seat 22 and the mating corner piece 14, and reducing maintenance costs.

[0100] Furthermore, in the actual manufacturing process, due to the influence of various factors, the size and shape of the positioning protrusion 222 may have certain errors. By designing the guide surface 226 as a slope, these minor errors can be compensated to a certain extent, so that even if the size of the positioning protrusion 222 is slightly off, it can still be assembled smoothly, which improves the flexibility and adaptability of assembling the connecting lock seat 22 and the mating corner piece 14.

[0101] Please refer to Figures 8-15 In some embodiments, the energy storage device 1 further includes a coupling 40, which is disposed on the outside of two adjacent mating corner pieces 14. The coupling 40 is disposed on the outside of the mating corner pieces 14 and the connecting lock seat 22. As an additional layer of protection, the coupling 40 can reduce the risk of the mating corner pieces 14 and the connecting lock seat 22 being directly exposed to the external environment, such as avoiding sun exposure, rain, impact, etc., thereby extending the service life of the mating corner pieces 14 and the connecting lock seat 22.

[0102] The fixed connector 24 passes through the connecting member 40, the mating corner piece 14 and the connecting lock seat 22 for fixed connection. The fixed connector 24 fixes the connecting member 40, the mating corner piece 14 and the connecting lock seat 22, forming a more stable overall structure. It effectively disperses the force at the connection point, making the mating corner piece 14 and the connecting lock seat 22 more stable when subjected to external forces and less prone to deformation or damage.

[0103] Please refer to Figures 8-15 In some embodiments, the coupling 40 includes a first portion 42 and a second portion 44 that intersect each other, and the first portion 42 and the second portion 44 are respectively fixedly engaged with the adjacent sidewalls of the mating corner piece 14 by a fixed connector 24.

[0104] As can be seen, the first part 42 and the second part 44, which are intersecting, are fixedly engaged with the side wall of the mating corner piece 14, forming a stable structure similar to a triangle. This helps to improve the ability of the connecting part 40 to resist deformation or damage under external force. At the same time, it increases the connection points between the connecting part 40 and the mating corner piece 14, which can improve the connection strength between the connecting part 40 and the mating corner piece 14, so that the fixed engagement between the connecting part 40, the mating corner piece 14 and the connecting lock seat 22 is more stable, which facilitates the improvement of the stability of the adjacent compartments 10 after assembly.

[0105] Please refer to Figures 8-11 and Figure 14 In some embodiments, the connector 40 is provided with a limiting member 46 extending into the mating corner member 14, forming a physical constraint that effectively restricts the relative movement between the mating corner member 14 and the connector 40. This ensures that the connector 40, the mating corner member 14, and the connecting lock seat 22 can maintain a relatively stable positional relationship when subjected to force, avoiding loosening or failure of the connection due to movement. This improves the stability of the fixed connection between the connector 40, the mating corner member 14, and the connecting lock seat 22, thereby improving the stability when multiple compartments 10 are stacked.

[0106] Please refer to Figures 8-11 and Figure 14In some embodiments, the mating corner piece 14 is provided with a first fixing hole 148 that mates with the fixed connector 24. The limiting member 46 extends into the mating corner piece 14 through the first fixing hole 148, which simplifies the positioning process of the connector 40 and the mating corner piece 14. That is, when the limiting member 46 extends into the first fixing hole 148, the connector 40 and the mating corner piece 14 are in the correct installation position. Without the need for complex adjustments and calibrations, the fixed connector 24 can be quickly and accurately installed in the correct installation position, which facilitates the installation of the fixed connector 24 and improves the installation efficiency. At the same time, the limiting member 46 can restrict the movement of the fixed connector 24 in the first fixing hole 148, reducing the possibility of the connector 40 loosening or displacement due to external forces, thereby improving the stability of the fixed connection between the connector 40, the mating corner piece 14 and the connecting lock seat 22.

[0107] Please refer to Figures 8-11 and Figure 14 In some embodiments, the coupling 40 is provided with a second fixing hole 48 that mates with the fixing connector 24, and at least a portion of the limiting member 46 is disposed around the second fixing hole 48.

[0108] As can be seen, by assembling the limiting member 46 with the mating corner member 14, the positioning of the connecting member 40 and the mating corner member 14 becomes more intuitive and simple. The staff does not need to rely on complicated measuring or adjustment tools. They only need to ensure that the limiting member 46 is correctly aligned and extends into the mating corner member 14 to ensure that the connecting member 40 and the mating corner member 14 are in the correct installation position, which facilitates the subsequent installation of the fixed connecting member 24 through the second fixing hole 48.

[0109] In addition, the limiting member 46 is provided at least partially around the second fixing hole 48. The limiting member 46 can restrict the movement of the fixed connecting member 24 in the second fixing hole 48, reducing the possibility of the connecting member 40 loosening or displacement due to external force, thereby improving the stability of the fixed connection of the connecting member 40, the mating corner member 14 and the connecting lock seat 22.

[0110] It is understandable that the limiting member 46 can also be set all around the second fixing hole 48 in order to better restrict the movement of the fixing member 24 in the second fixing hole 48, and to improve the stability of multiple compartments 10 after stacking.

[0111] Please refer to Figure 3 , Figure 4 , Figure 8 and Figure 14In some embodiments, the mating corner piece 14 is provided with a first fixing hole 148 that mates with the fixing connector 24, and the connecting piece 40 is provided with a second fixing hole 48 that mates with the fixing connector 24. The first fixing hole 148 and the second fixing hole 48 are arranged opposite to each other. The limiting member 46 extends into the mating corner piece 14 through the first fixing hole 148. After the limiting member 46 is extended into the first fixing hole 148, the connecting piece 40 and the mating corner piece 14 are in the correct installation position. At this time, the first fixing hole 148 and the second fixing hole 48 are in the opposite position, which simplifies the positioning process of the connecting piece 40 and the mating corner piece 14 and facilitates the subsequent fixing of the connecting piece 40 and the mating corner piece 14 by the fixing connector 24, thereby improving the assembly efficiency of the connecting piece 40 and the mating corner piece 14.

[0112] Secondly, embodiments of this application provide an energy storage system 2, including an energy storage device 1 as described in the first aspect, with a battery device 50 disposed within a housing cavity 11. The energy storage device 1 can be an energy storage container or an energy storage cabinet.

[0113] In the above technical solution, the energy storage device 1 has good stability, so that the energy storage device 1 can provide more stable power to the energy storage system 2, which is conducive to improving the stability of the energy storage system 2.

[0114] The following describes a specific embodiment of the energy storage device 1 of this application. Please refer to... Figures 2-15 The energy storage device 1 includes: multiple chambers 10, connecting components 20 and connecting parts 40.

[0115] Multiple compartments 10 are stacked along a first direction. Each compartment 10 includes a box 12 and a mating corner piece 14. The box 12 is provided with a receiving cavity 11 for accommodating a battery device 50. The mating corner piece 14 is provided on the outer peripheral wall of the box 12 and is provided with a first positioning part 140.

[0116] The connecting assembly 20 includes a connecting lock seat 22 and a fixed connector 24. Both ends of the connecting lock seat 22 are provided with second positioning parts 220. The second positioning parts 220 at both ends of the connecting lock seat 22 are respectively inserted and engaged with the first positioning parts 140 of the adjacent mating corner pieces 14. Each mating corner piece 14 and the corresponding connecting lock seat 22 are fixedly connected by the fixed connector 24.

[0117] The first positioning part 140 is a positioning cavity 142, and the second positioning part 220 is a positioning protrusion 222. The inner wall of the positioning cavity 142 is provided with an insertion hole 142a. The end of the positioning protrusion 222 is provided with a protrusion 222a protruding from it. The protrusion 222a is located in the insertion hole 142a. The cross-sectional area of ​​the protrusion 222a gradually decreases in the direction away from the positioning protrusion 222. The fixing connector 24 fixes the corresponding mating corner piece 14 and the second positioning part 220.

[0118] The connecting lock seat 22 also includes a clamping part 224 located between the second positioning parts 220 at both ends. The clamping part 224 clamps between adjacent mating corner pieces 14. The foolproof part 30 is provided on the clamping part 224 and located on the outside of the adjacent mating corner pieces 14. The foolproof part 30 extends along the first direction.

[0119] The connecting member 40 is located on the outside of two adjacent mating corner members 14. The connecting member 40 includes a first part 42 and a second part 44 that intersect. The first part 42 and the second part 44 are respectively fixedly engaged with the adjacent sidewalls of the mating corner members 14 through the fixed connecting member 24. The mating corner member 14 is provided with a first fixing hole 148 that engages with the fixed connecting member 24. The connecting member 40 is provided with a second fixing hole 48 that engages with the fixed connecting member 24. The limiting member 46 extends into the mating corner member 14 through the first fixing hole 148. At least a portion of the limiting member 46 is arranged around the second fixing hole 48.

[0120] Taking the vertical direction as an example, the operator can first align and insert the mating corner piece 14 of the lower compartment 10 with the connecting lock seat 22, then align and insert the mating corner piece 14 of the upper compartment 10 with the connecting lock seat 22, then insert the limiting piece 46 into the mating corner piece 14 through the first fixing hole 148, and finally fix the mating corner piece 14, the connecting lock seat 22, and the connecting piece 40 into a whole through the fixing connector 24. Thus, through the combined action of the connecting component 20, the mating corner piece 14, and the connecting piece 40, the assembly process of adjacent compartments 10 is simplified, and multiple compartments 10 stacked together have good stability.

[0121] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: Multiple compartments are stacked along a first direction. Each compartment includes a box and a mating corner piece. The box has a cavity for holding a battery device. The mating corner piece is located on the outer peripheral wall of the box and has a first positioning part. A connecting assembly includes a connecting lock seat and a fixed connector. The connecting lock seat has a second positioning part at both ends. The second positioning parts at both ends of the connecting lock seat are respectively inserted and engaged with the first positioning part of the adjacent mating corner piece. Each mating corner piece and the corresponding connecting lock seat are fixedly connected by the fixed connector.

2. The energy storage device according to claim 1, characterized in that, The first positioning part is a positioning cavity, and the second positioning part is a positioning protrusion, wherein the positioning protrusion is located inside the positioning cavity.

3. The energy storage device according to claim 2, characterized in that, The fixed connector secures the corresponding mating corner piece and the second positioning part.

4. The energy storage device according to claim 2, characterized in that, The inner wall of the positioning cavity is provided with an insertion hole, and the end of the positioning protrusion is provided with a protruding part, which is located in the insertion hole.

5. The energy storage device according to claim 4, characterized in that, The cross-sectional area of ​​the protrusion gradually decreases in the direction away from the positioning protrusion.

6. The energy storage device according to claim 2, characterized in that, The connecting lock seat also includes a clamping part located between the second positioning parts at both ends, the clamping part clamping between adjacent mating corner pieces.

7. The energy storage device according to claim 6, characterized in that, It also includes a foolproof part, which is disposed on the clamping part and located on the outside of the adjacent mating corner piece, and the foolproof part extends along the first direction.

8. The energy storage device according to claim 7, characterized in that, The anti-mistake part is formed as a cylinder extending along the first direction.

9. The energy storage device according to claim 6, characterized in that, The mating corner piece includes an end plate and a surrounding plate. The surrounding plate has the end plate at both ends in the first direction. The end plate and the surrounding plate define the positioning cavity. One of the end plates has an opening. The positioning protrusion extends into the positioning cavity through the opening. The clamping part is clamped between adjacent end plates.

10. The energy storage device according to claim 9, characterized in that, The connecting lock seat includes a guide surface, which is connected to the clamping part and the second positioning part respectively. The guide surface is formed as an inclined surface and cooperates with the opening.

11. The energy storage device according to any one of claims 1-10, characterized in that, It also includes a connecting member, which is located on the outside of two adjacent mating corner pieces, and the fixing connector passes through the connecting member, the mating corner pieces and is fixedly connected to the connecting lock seat.

12. The energy storage device according to claim 11, characterized in that, The connecting member includes a first part and a second part that intersect each other, and the first part and the second part are respectively fixedly connected to the adjacent sidewalls of the mating corner piece through the fixed connecting member.

13. The energy storage device according to claim 11, characterized in that, The connecting member is provided with a limiting member that extends into the mating corner member.

14. The energy storage device according to claim 13, characterized in that, The mating corner piece is provided with a first fixing hole that mates with the fixing connector, and the limiting member extends into the mating corner piece through the first fixing hole.

15. The energy storage device according to claim 13, characterized in that, The connecting member is provided with a second fixing hole that mates with the fixed connecting member, and at least a portion of the limiting member is arranged around the second fixing hole.

16. An energy storage system, characterized in that, Includes the energy storage device according to any one of claims 1-15.

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