Electrical cabinet, energy storage system and electric device

Abstract

The application relates to the energy storage field and provides an electrical cabinet, an energy storage system and a power utilization device, wherein the electrical cabinet comprises a cabinet frame, a support fixedly connected to the cabinet frame, a wiring assembly arranged in the cabinet frame, the wiring assembly being at least partially arranged around the support, the wiring assembly comprising a first bus assembly and a second bus assembly, the first bus assembly and the second bus assembly being arranged in layers, and the second bus assembly being at least partially arranged around the first bus assembly, and a connecting assembly comprising an elastic buffer, the connecting assembly being used for fixedly connecting the first bus assembly and the second bus assembly to the support or the cabinet frame, so that the problems of large space occupation and difficult wiring operation can be at least solved.

Description

Technical Field

[0001] This application relates to the field of energy storage, and in particular to an electrical cabinet, an energy storage system, and electrical equipment. Background Technology

[0002] With the rapid development of new energy technologies, containerized energy storage devices have been widely used. In energy storage systems, the electrical cabinet, as a key device connecting battery clusters to external loads, integrates a large number of busbars and electrical components. To achieve refined management of energy storage units, string wiring structures are gradually becoming the mainstream.

[0003] However, in related technologies, the wiring structure of electrical cabinets is usually complex with many lines, resulting in a large internal space occupation and difficult wiring operations. Summary of the Invention

[0004] This application provides an electrical cabinet, an energy storage system, and electrical equipment, which at least helps to solve the problems of large space occupation of wiring structures and difficult wiring operations.

[0005] Optionally, this application provides an electrical cabinet, comprising: a cabinet frame; a support member fixedly connected to the cabinet frame; a wiring assembly disposed within the cabinet frame, the wiring assembly at least partially surrounding the support member; the wiring assembly including a first bus assembly and a second bus assembly, the first bus assembly and the second bus assembly being stacked, and the second bus assembly at least partially surrounding the first bus assembly; and a connecting assembly including an elastic buffer member, the connecting assembly fixingly connecting the first bus assembly and the second bus assembly to the support member or the cabinet frame via the elastic buffer member.

[0006] Optionally, the first bus assembly includes a plurality of first busbars arranged at intervals along a third direction. Each first busbar includes a first main body and first bent portions disposed at both ends of the first main body. The first main body extends along a first direction, and the first bent portions extend along a second direction. The first direction, the second direction, and the third direction intersect each other. The second bus assembly includes a plurality of second busbars arranged at intervals along the third direction. Each second busbar includes a second main body and second bent portions disposed at both ends of the second main body. The second main body extends along the first direction, and the second bent portions extend along the second direction. The first main body and the second main body are spaced apart in the second direction, and the opposite first bent portions and second bent portions are spaced apart in the first direction.

[0007] Optionally, the first bend and the second bend, which are adjacent in the first direction, are arranged alternately along the third direction.

[0008] Optionally, the first bending portion includes a first external wiring portion and a first internal wiring portion; the second bending portion includes a second external wiring portion and a second internal wiring portion; wherein the ends of the first external wiring portion and the ends of the second external wiring portion are offset in the second direction, and the ends of the first internal wiring portion and the ends of the second internal wiring portion are offset in the second direction. Thus, by utilizing the offset design of the external wiring portions (e.g., left-right or up-down offset), the wiring portions of the inner layer are not completely obscured by the outer layer. During operation and maintenance or installation, operating tools can directly access the inner layer wiring portions, enabling independent maintenance of the inner layer without disassembling the outer busbar, greatly improving operation and maintenance efficiency.

[0009] Optionally, the first pair of inner wiring portions are provided with a clearance section that avoids the bend of the second busbar assembly.

[0010] Optionally, the connecting assembly further includes a rigid limiting member, which passes through the elastic buffer member; the axial length of the rigid limiting member is less than the thickness of the elastic buffer member in its natural state, and greater than or equal to the thickness of the elastic buffer member in its maximum allowable compression state. Thus, the rigid limiting member serves a dual function of "distance setting" and "protection".

[0011] Optionally, the connection assembly further includes an insulating spacer disposed between the support member and the first busbar assembly, and between the first busbar assembly and the second busbar assembly; wherein, the elastic buffer is disposed on the contact surface between the insulating spacer and the first busbar assembly and / or the second busbar assembly; or, the elastic buffer is integrally formed with the insulating spacer.

[0012] Optionally, a plurality of the insulating spacers are arranged sequentially at intervals along a third direction, and the gaps between adjacent insulating spacers form heat dissipation channels between the first busbar assembly and the support member, and between the first busbar assembly and the second busbar assembly.

[0013] Optionally, the web of the support member is provided with ventilation holes, the positions of which correspond to the gaps between adjacent first busbars.

[0014] Optionally, all the first busbars are of the first polarity, and all the second busbars are of the second polarity, with the first polarity being opposite to the second polarity; the first external connection portion has a first mounting hole or a first terminal structure, and the second external connection portion has a second mounting hole or a second terminal structure, wherein the first mounting hole is different from the second mounting hole, or the first terminal structure is different from the second terminal structure.

[0015] Optionally, the support member is a profile with an open slot structure; the connecting assembly includes a fastener, the head of which is accommodated inside the open slot structure, and the head of the fastener has an anti-rotation surface, which cooperates with the sidewall of the open slot structure to restrict the rotation of the fastener.

[0016] Optionally, this application also provides an energy storage system, including: a plurality of battery clusters; and an electrical cabinet as described above, wherein the electrical cabinet is electrically connected to the battery clusters and an external load respectively.

[0017] Optionally, this application also provides an electrical appliance, which includes the electrical cabinet described above.

[0018] The technical solution provided in this application has at least the following advantages:

[0019] This application employs a stacked arrangement of a first and a second busbar assembly, with the second busbar assembly at least partially surrounding the first, and both partially surrounding a support member, forming a compact, three-dimensional, double-layered surround structure. This effectively reduces the volume of the wiring components within the cabinet while meeting electrical connection requirements, thus improving space utilization. More importantly, this application introduces an elastic buffer in the connection components, using it to fix the busbar assembly to the support member or cabinet frame. When the electrical cabinet starts or shuts down, generating electrodynamic force, the elastic buffer effectively absorbs vibration energy, providing cushioning and shock absorption. This not only prevents deformation or displacement of the busbar assembly due to long-term vibration, ensuring stable electrical clearances between components, but also effectively prevents the fixing structure from loosening, significantly improving the safety and reliability of the electrical cabinet operation. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electrical cabinet provided in one embodiment of this application;

[0022] Figure 2 A schematic diagram of the structure of a wiring assembly, support member, and connecting assembly in an electrical cabinet provided in an embodiment of this application;

[0023] Figure 3 A side view of a wiring assembly, support member, and connection assembly in an electrical cabinet according to an embodiment of this application;

[0024] Figure 4 This is a structural schematic diagram from another perspective of a wiring assembly, support member, and connection assembly in an electrical cabinet provided in an embodiment of this application;

[0025] Figure 5 A rear view of a wiring assembly, support member, and connection assembly in an electrical cabinet according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of a second busbar assembly in an electrical cabinet, provided as an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Cabinet frame; 110. Structural components;

[0029] 20. Support components;

[0030] 30. Wiring assembly; 31. First busbar assembly; 32. Second busbar assembly; 310. First busbar; 311. First main body; 312. First external wiring section; 313. First internal wiring section; 320. Second busbar; 321. Second main body; 322. Second external wiring section; 323. Second internal wiring section; 33. Insulating sleeve;

[0031] 40. Connecting components. Detailed Implementation

[0032] As the background technology shows, with the development of energy storage systems towards refined management, string wiring structures are widely used due to their flexibility. However, this has led to a surge in the number of wirings within the cabinet, resulting in large space occupation and wiring difficulties. Further in-depth analysis of existing technologies and practical application scenarios reveals that the fundamental reasons for the insufficient reliability and maintenance difficulties of electrical cabinets are: firstly, in traditional string wiring structures, the mechanical strength of a single circuit is lower than that of a centralized wiring structure. When the energy storage device starts up, shuts down, or experiences a short circuit, the huge current changes generate strong electrodynamic forces. These forces can easily cause the wiring structure to vibrate, shift, or even deform, leading to electrical clearances no longer meeting safety requirements, or causing fasteners at fixed connections to loosen, resulting in serious contact problems or arcing hazards. Secondly, simply adopting a tight stacking arrangement to solve the space occupation problem can lead to the formation of "heat traps" between multiple conductors, making heat difficult to dissipate and thus limiting the current carrying capacity of the electrical cabinet.

[0033] This application provides an electrical cabinet that uses a stacked and surrounding arrangement of a first busbar assembly and a second busbar assembly, along with a support member, to form a three-dimensional double-layer wiring structure. This significantly reduces the space occupied by wiring while using a connecting assembly containing an elastic buffer to fix the busbar assembly to the support member. The damping characteristics and deformation capacity of the elastic buffer member can absorb the vibration energy caused by electrodynamics, thereby preventing the busbar from loosening or deforming due to long-term vibration. This significantly improves the structural stability and operational reliability of the electrical cabinet throughout its entire life cycle while ensuring electrical safety distance.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0035] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments 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 three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0037] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. For example, if the device or element in the illustration is inverted, then the element described as "below," "under," "below," or "bottom" of other elements or features will be oriented "above" or "top" of said other elements or features. Therefore, the term "below" may cover both above and below orientation depending on the context in which the term is used, which will be obvious to those skilled in the art. Materials may be oriented in other ways (e.g., rotated 90 degrees, inverted, flipped), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] In the description of embodiments of this application, the terms "about," "approximately," "roughly," or "about" for a numerical value referring to a specific parameter include the numerical value, and those skilled in the art will understand that the deviation from the numerical value is within the acceptable tolerance of the specific parameter. For example, "about" or "about" for a numerical value may include additional numerical values ​​that are in the range of 90.0% to 110.0% of the numerical value, such as in the range of 95.0% to 105.0%, 97.5% to 102.5%, 99.0% to 101.0%, 99.5% to 100.5%, or 99.9% to 100.1%.

[0040] In the accompanying drawings corresponding to the embodiments of this application, the thickness and / or area of ​​layers, films, panels, regions, etc., are enlarged for better understanding and ease of description. Throughout the specification, the same reference numerals denote the same elements. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0041] In the description of embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and may be further included. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be an intermediate component between the two components. Conversely, when describing a component on the surface of another component, or a component "directly" on another component, or a component surface on which another component is formed or disposed, it indicates that there is no intermediate component between the two components. For simplicity and clarity, various components may be drawn at any scale. In the drawings, some components may be omitted for simplicity.

[0042] The terminology used in the description of the various embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the description of the various embodiments and the appended claims, the term "the component" is also intended to include the plural form unless the context clearly indicates otherwise.

[0043] The “components” mentioned above can refer to layers, membranes, regions, parts, plates, or structures, etc.

[0044] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0045] Figure 1 This is a schematic diagram of the structure of an electrical cabinet provided in one embodiment of this application; Figure 2 A schematic diagram of the structure of a wiring assembly, support member, and connecting assembly in an electrical cabinet provided in an embodiment of this application; Figure 3 A side view of a wiring assembly, support member, and connection assembly in an electrical cabinet according to an embodiment of this application; Figure 4 This is a structural schematic diagram from another perspective of a wiring assembly, support member, and connection assembly in an electrical cabinet provided in an embodiment of this application; Figure 5 A rear view of a wiring assembly, support member, and connection assembly in an electrical cabinet according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a second busbar assembly in an electrical cabinet, provided as an embodiment of this application.

[0046] refer to Figures 1 to 6 The electrical cabinet includes:

[0047] Cabinet frame 10;

[0048] Support component 20 is fixedly connected to the cabinet frame 10;

[0049] Wiring assembly 30 is disposed within the cabinet frame 10 and at least partially surrounds the support member 20; the wiring assembly 30 includes a first bus assembly 31 and a second bus assembly 32, which are stacked and the second bus assembly 32 at least partially surrounds the first bus assembly 31.

[0050] The connecting component 40 includes an elastic buffer, which securely connects the first busbar component 31 and the second busbar component 32 to the support component 20 or the cabinet frame 10.

[0051] This embodiment of the application, by stacking a first busbar assembly 31 and a second busbar assembly 32, and utilizing the second busbar assembly 32 to at least partially surround the first busbar assembly 31, along with both partially surrounding the support member 20, forms a compact three-dimensional double-layer surround structure. This effectively reduces the volume occupied by the wiring assembly 30 within the cabinet while meeting electrical connection requirements, thus improving space utilization. More importantly, this embodiment introduces an elastic buffer in the connection assembly 40, using the elastic buffer to fix the busbar assembly to the support member 20 or the cabinet frame 10. When the electrical cabinet starts or stops generating electrodynamic force, the elastic buffer effectively absorbs vibration energy, providing buffering and shock absorption. This not only prevents deformation or displacement of the busbar assembly due to long-term vibration, ensuring stable electrical clearances between components, but also effectively prevents the loosening of the fixing structure, significantly improving the safety and reliability of the electrical cabinet operation.

[0052] The embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0053] Reference Figures 1 to 3 As shown in the illustration, this application provides an electrical cabinet, which includes: a cabinet frame 10, a support member 20, a wiring assembly 30, and a connecting assembly 40. The support member 20 is fixedly connected to the cabinet frame 10; the wiring assembly 30 is disposed within the cabinet frame 10, and at least partially surrounds the support member 20; the wiring assembly 30 includes a first bus assembly 31 and a second bus assembly 32, which are stacked, and the second bus assembly 32 at least partially surrounds the first bus assembly 31; the connecting assembly 40 includes an elastic buffer, which securely connects the first and second bus assemblies to the support member 20 or the cabinet frame 10. The electrical cabinet has intersecting and perpendicular first directions X, second directions Y, and third directions Z.

[0054] like Figure 1 As shown, the cabinet frame 10 and support member 20: The cabinet frame 10 serves as the basic load-bearing structure of the electrical cabinet, forming an installation space to accommodate electrical components. The cabinet frame 10 includes structural members 110 extending along a plurality of first directions X or third directions Z. The support member 20 is disposed within the cabinet frame 10 and connected to the structural members 110, providing a stable mounting point for the wiring assembly 30. In other words, the structural member 110 is the beam structure of the cabinet frame 10, and the support member 20 is a profile structure, with both ends of the support member 20 fixedly connected to the structural member 110.

[0055] In some embodiments, the support member 20 is a profile with an open groove structure. The open groove structure of the support member 20 is disposed away from the first busbar assembly 31 or the second busbar assembly 32, and the open groove structure of the support member 20 is oriented to facilitate the insertion of installation tools. By using a profile with an open groove structure as the support member 20, this embodiment of the application improves the support strength by utilizing the bending structure that forms the open groove structure, enabling it to withstand the gravity and electrodynamic impact of the multi-layer busbar assembly. On the other hand, the open groove structure provides operating space for the installation of fasteners, making it convenient for maintenance personnel to assemble using tools such as socket wrenches.

[0056] In some embodiments, the support member 20 can be a U-shaped profile or a C-shaped profile, that is, a profile with a U-shaped or C-shaped cross section. The support member 20 can also be a hollow profile structure with an internal channel and an opening groove structure on the surface part away from the first busbar assembly 31 or the second busbar assembly 32. No specific limitation is made here.

[0057] Combination Figures 2-6 As shown, the wiring assembly 30 includes a first bus assembly 31 and a second bus assembly 32. The first bus assembly 31 and the second bus assembly 32 are stacked, and the second bus assembly 32 is at least partially arranged around the first bus assembly 31, forming a three-dimensional wiring structure with inner and outer layers. Both the first bus assembly 31 and the second bus assembly 32 are arranged in a U-shape and sequentially surround the outer periphery of the support member 20. The opening directions of the U-shaped structures formed by the first bus assembly 31 and the second bus assembly 32 are the same, so that the two ends of the first bus assembly 31 and the second bus assembly 32 are close together, facilitating the layout, wiring, and cable management for installation and maintenance personnel. This embodiment of the application achieves high-density electrical connections within a limited cabinet space through the stacking of the first bus assembly 31 and the second bus assembly 32, and by utilizing the double-layer layout of the second bus assembly 32 surrounding the first bus assembly 31 and both surrounding the support member 20. Compared to the traditional planar laying method, this three-dimensional structure significantly reduces the volume occupied by the wiring assembly 30 within the cabinet, improving the space utilization and power density of the electrical cabinet.

[0058] Combination Figure 2 , Figure 3 , Figure 6As shown, the first bus assembly 31 is located in the inner layer of the wiring assembly 30, that is, closer to the support member 20. The first bus assembly 31 includes a plurality of first busbars 310, which are arranged at intervals along a third direction Z. Each first busbar 310 includes a first main body 311 and a first bend connected to both ends of the first main body 311. The first main body 311 extends along a first direction X, and the first bend extends along a second direction Y, so that the first busbar 310 presents a U-shaped structure, thereby partially surrounding or encircling the support member 20. The first bend includes a first external connection part 312 and a first internal connection part 313, which are used to connect external cables and battery cluster cables inside the cabinet, respectively.

[0059] Combination Figure 2 , Figure 3 As shown, the second bus assembly 32 is located on the outer layer of the wiring assembly 30, and is stacked on the outer periphery of the first bus assembly 31, so that the second bus assembly 32 at least partially surrounds the first bus assembly 31. Similar to but independent of the first bus assembly 31, the second bus assembly 32 includes a plurality of second busbars 320, which are also arranged at intervals along a third direction Z. Each second busbar 320 includes a second main body portion 321 and a second bend portion connecting the two ends of the second main body portion 321. The second main body portion 321 extends along a first direction X, and its length is greater than the length of the first main body portion 311, so that the second bus assembly 32 can cross the first bus assembly 31; in the second direction Y, the orthographic projections of the first main body portion 311 and the second main body portion 321 overlap. The second bend portion extends along the second direction Y. The second bend portion includes a second external wiring portion 322 and a second internal wiring portion 323. The number of second busbars 320 is equal to the number of first busbars 310, so that the wiring assembly 30 is constructed as a string wiring structure.

[0060] It should be noted that the first bus component 31 and the second bus component 32 are stacked, meaning that corresponding portions of the first bus component 31 and the second bus component 32 are spaced apart in the first direction X or the second direction Y. In other words, corresponding portions of the first busbar 310 and the second busbar 320 are spaced apart in the first direction X or the second direction Y. Specifically, the first main body portion 311 and the second main body portion 321 are spaced apart in the second direction Y; the first external connection portion 312 and the second external connection portion 322 are spaced apart in the first direction X; and the first internal connection portion 313 and the second internal connection portion 323 are spaced apart in the first direction X. The corresponding portions of the first busbar 310 and the second busbar 320 may have their projections in the first direction X or the second direction Y completely overlapping, overlapping, or staggered; no specific limitation is made here. It should also be noted that, in this embodiment, the cross-sectional structure of the first busbar component 31 and the second busbar component 32 is a U-shaped structure with an opening. The openings of the first busbar component 31 and the second busbar component 32 are both oriented in the same direction (the second direction Y). The first busbar component 31 is stacked on the outer periphery of the second busbar component 32. In other embodiments, the cross-sectional structure of the first busbar component 31 and the second busbar component 32 may also be a circular ring structure or a polygonal structure with an opening, which is not specifically limited here.

[0061] This embodiment of the application, through the layered and independent arrangement of the first busbar component 31 and the second busbar component 32, and their spaced arrangement along the third direction Z, forms a compact string-type three-dimensional wiring structure inside the electrical cabinet. In this layout, the first main body 311 and the second main body 321 are spaced apart in the second direction Y, and the opposing first bend and second bend are spaced apart in the first direction X, thereby creating sufficient electrical insulation space between the inner and outer layers to prevent electrical breakdown between different polarities or different circuits. (Refer to...) Figures 2 to 5As shown, the first bus assembly 31 and the second bus assembly 32 employ a staggered design at their connection points. The first bend and the second bend are sequentially staggered in the third direction Z. Specifically, the ends of the first external connection 312 and the second external connection 322 are staggered in the third direction Z; in other words, the orthographic projections of the corresponding ends of the first external connection 312 and the second external connection 322 in the first direction X may or may not overlap. Similarly, the ends of the first internal connection 313 and the second internal connection 323 are staggered in the third direction Z; in other words, the orthographic projections of the corresponding ends of the first internal connection 313 and the second internal connection 323 in the first direction X may or may not overlap. In other words, the bends of the first bus 310 and the second bus 320 are staggered in the third direction Z. In other words, the projected portions of the first external wiring section 312 and the second external wiring section 322 in the third direction Z overlap or do not overlap at all, and the projected portions of the first internal wiring section 313 and the second internal wiring section 323 in the third direction Z overlap or do not overlap at all. The staggered design of the bent portions in the third direction Z of this embodiment allows operators to clearly distinguish the wiring points of the first busbar 310 and the second busbar 320 when facing the electrical cabinet, avoiding incorrect wiring. Furthermore, the staggered arrangement of the bent portions of the first busbar 310 and the second busbar 320 in the third direction Z, compared to an arrangement where the projected portions overlap in the third direction Z, increases the creepage distance between the bent portions, thereby improving the electrical safety performance of the electrical cabinet in this embodiment.

[0062] In some embodiments, refer to Figure 4 As shown, the first bend includes a first external wiring section 312 and a first internal wiring section 313, and the second bend includes a second external wiring section 322 and a second internal wiring section 323. The ends of the first external wiring section 312 and the ends of the second external wiring section 322 are staggered in the second direction Y. Specifically, the length of the external wiring section of the inner copper busbar is greater than that of the external wiring section of the outer copper busbar, so that the wiring section of the inner copper busbar is located below the wiring section of the outer copper busbar. This staggered design solves the problem of difficult wiring in a double-layer structure. During field wiring, operators can first connect the lower inner wiring section and then connect the upper outer wiring section without interference, greatly improving wiring convenience and maintenance efficiency.

[0063] In some embodiments, the first pair of inner wiring portions 313 is provided with a clearance section that bends away from the second bus assembly 32. That is, the end of the first pair of inner wiring portions 313 away from the first main body portion 311 is further bent in a direction away from the second bus assembly 32 to form a clearance section. The clearance section further increases the creepage distance between the inner and outer layers at the wiring portion location and reduces the risk of short circuit.

[0064] Combination Figure 3 , Figure 4 As shown, the corresponding first busbar 310 and second busbar 320 are connected by a connecting assembly 40, and the second busbar 320 is connected to its adjacent structural member 110 by the connecting assembly 40. The second busbar 320 at least partially surrounds the outer periphery of the support member 20, and the second busbar 320 is connected to the support member 20 by the connecting assembly 40.

[0065] In some embodiments, the second busbar 320 is connected to its adjacent structural member 110 via a connecting component 40, that is, the second busbar 320 is connected to the cabinet frame 10 via the connecting component 40. In other embodiments, the second busbar 320 can be connected to other structures in the cabinet frame 10 via the connecting component 40, such as the panel of the cabinet frame 10 (not shown in the figure) or other supporting structural members in the cabinet frame 10, which are not specifically limited here.

[0066] In some embodiments, the second busbar 320 is connected to its adjacent structural member 110 (cabinet frame 10) and its corresponding first busbar 310 via multiple connecting components 40. That is, the outer side of the second busbar 320 is connected to the structural member 110 via connecting components 40, and the inner side of the second busbar 320 is connected to its corresponding first busbar 310 via another connecting component 40. In other embodiments, the second busbar 320 can be connected to the cabinet frame 10 via the outer connecting component 40, and the second busbar 320 can also be connected to its corresponding first busbar 310 via the inner connecting component 40. The second busbar 320 can also be connected to the support member 20 by the inner connecting component 40 passing through the gap between adjacent first busbars 310. The second busbar 320 can be fixedly connected using any two or more of the above-mentioned connection methods, without specific limitations.

[0067] In some embodiments, the orthographic projections of the first main body portion 311 and the second main body portion 321 in the second direction Y at least partially overlap, the orthographic projections of the first external wiring portion 312 and the second external wiring portion 322 in the first direction X at least partially overlap, and the orthographic projections of the first internal wiring portion 313 and the second internal wiring portion 323 in the first direction X at least partially overlap. That is, the orthographic projections of the first busbar 310 and the second busbar 320 in the first direction X or the second direction Y at least partially overlap, so that the overlapping and corresponding first busbar 310 and second busbar 320 can be connected to each other or connected to the support member 20 through the same connecting component 40. This simplifies the overall connection structure of the embodiments of the present application while ensuring the overall structural strength of the embodiments, reduces the number of connecting components 40 that need to be fastened, reduces the complexity of the assembly process, and reduces production costs.

[0068] In some embodiments, the connecting assembly 40 includes fasteners, insulating spacers, and elastic buffers. Both the first busbar 310 and the second busbar 320 have a plurality of fixing holes extending along their thickness. Fasteners are inserted into these fixing holes to fix adjacent first busbars 310 and second busbars 320 together, or to fix adjacent second busbars 320 to the structural member 110. Insulating spacers and elastic buffers are sleeved around the outer periphery of the fasteners. The fasteners are made of an insulating rigid material.

[0069] In some embodiments, the insulating spacer has a sheet-like structure and is made of an insulating material. The insulating spacer is sandwiched between the second busbar 320 and the support member 20, between the elastic buffer member and the first busbar 310, or between the elastic buffer member and the second busbar 320, so as to provide insulation and isolation between the first busbar assembly 31, the second busbar assembly 32, and the support member 20.

[0070] In some embodiments, an elastic buffer is disposed between the first busbar 310 and the second busbar 320, or between the structural member 110 and the second busbar 320. Based on this, when the electrical cabinet starts up, cuts off the current, or experiences a short-circuit fault, a huge electrodynamic force is generated between the busbars. The elastic buffer, utilizing its own elastic deformation capability, can effectively absorb and dissipate the instantaneous vibration energy caused by the electrodynamic force, thus playing a role in damping and shock absorption. This not only prevents the busbars from undergoing permanent deformation due to rigid impact, but also effectively avoids the fasteners from loosening due to long-term high-frequency micro-vibration, significantly improving the safety of the system.

[0071] In some embodiments, the elastic buffer is made of at least one of silicone, rubber, or polyurethane. Elastic buffers made of these materials can provide appropriate compression rebound while ensuring insulation performance, absorbing vibrations without being too soft and causing instability in busbar positioning.

[0072] In some embodiments, the thickness of the elastic buffer is 1mm to 5mm. Optionally, the thickness of the elastic buffer is 1.5mm to 4.5mm. Optionally, the thickness of the elastic buffer can be 1mm, 2mm, 3mm, 4mm, or 5mm. The embodiments of this application design the thickness of the elastic buffer to be 1mm to 5mm so that the elastic buffer can provide sufficient cushioning stroke to absorb electrodynamic vibrations, without the connection structure becoming too loose due to excessive thickness, thus affecting positioning accuracy.

[0073] In some embodiments, the head of the fastener is received within the open slot structure. The head of the fastener has an anti-rotation surface that engages with the sidewall of the open slot structure to restrict the rotation of the fastener. The open slot structure facilitates the insertion of installation tools, and the anti-rotation design allows for single-handed tightening of the nut from the outside, eliminating the need to use a wrench to tighten the bolt head inside the channel steel, greatly improving assembly convenience in confined spaces. The fastener with the anti-rotation surface prevents the fastener from loosening due to vibrations generated by electrodynamic forces in the wiring assembly, extending the service life of the electrical cabinet in this embodiment.

[0074] In some embodiments, the connecting assembly 40 further includes a rigid limiting member. The rigid limiting member sleeves the outer periphery of the fastener and passes through the elastic buffer. The axial length of the rigid limiting member is less than the thickness of the elastic buffer in its natural state, and greater than or equal to the thickness of the elastic buffer in its maximum allowable compression state. The rigid limiting member serves a dual function of spacing and protection. During installation and tightening, the rigid limiting member bears the main locking force, preventing the elastic buffer from being over-compressed and losing its rebound and shock absorption function. During long-term use, even if the elastic buffer undergoes aging and creep, the rigid limiting member can still support the minimum installation distance, ensuring that the electrical clearances between the busbar and the support 20, and between busbars, always meet safety standards.

[0075] In some embodiments, the rigid limiting member is constructed as a stepped bushing, which includes a limiting section and a guide section. The fixing holes on the first busbar 310 and / or the second busbar 320 are configured as oblong holes extending along their extension direction. The guide section passes through the oblong hole, and the outer diameter of the guide section is slightly smaller than the minor diameter of the oblong hole to limit the displacement of the busbar in the third direction Z; simultaneously, the dimension of the guide section in the first direction X is smaller than the major diameter of the oblong hole, thereby allowing for thermal expansion clearance between the guide section and the inner wall of the oblong hole. This structure achieves the effects of vertical locking and longitudinal floating: in the direction perpendicular to the busbar surface, the elastic buffer and the limiting section of the rigid limiting member achieve clamping, effectively absorbing vibrations caused by electrodynamic forces; while in the longitudinal extension direction of the busbar, it allows for slight thermal expansion and contraction displacement due to temperature changes. This design avoids the accumulation of thermal stress caused by rigid fixing, prevents the insulation spacers from breaking due to long-term lateral shear force, and further improves the reliability of the electrical cabinet in all-weather extreme temperature difference environments.

[0076] In some embodiments, the support member 20 is provided with ventilation holes (not shown in the figure), which correspond to the gap between adjacent first busbars 310. External cold air can enter the interlayer gap between the first busbar assembly 31 and the second busbar assembly 32 directly through the ventilation holes on the support member 20 and the open slot structure of the support member 20. By utilizing the chimney effect or forced airflow inside the cabinet, the heat generated by the busbars is removed, effectively reducing the temperature rise of the inner busbars and improving the current carrying capacity of the electrical cabinet.

[0077] In some embodiments, refer to Figure 4 As shown, all first buses 310 are of the first polarity, and all second buses 320 are of the second polarity. This embodiment of the application reduces the voltage difference between adjacent buses on the same layer and lowers the risk of intra-layer insulation by arranging polarities in a layered manner.

[0078] In some embodiments, the end of the first bent portion is provided with a first mounting hole, and the end of the second bent portion is provided with a second mounting hole. In other words, the first mounting hole is provided at the end of the first external wiring portion 312 and the end of the first internal wiring portion 313, and the second mounting hole is provided at the end of the second external wiring portion 322 and the end of the second internal wiring portion 323. The first and second mounting holes are used for connection to wiring in the electrical cabinet or external wiring. The first and second mounting holes have different diameters. This embodiment utilizes different mounting holes to achieve physical error prevention, fundamentally eliminating the risk of incorrect positive and negative connections during field wiring, and further improving the safety of field construction.

[0079] In some embodiments, combined with Figure 3 , Figure 6 As shown, the wiring assembly 30 also includes an insulating sleeve 33, which is sleeved on the outer periphery of the first main body 311 and the second main body 321, or sleeved on the outer periphery of the first bend and the second bend. The insulating sleeve 33 is made of insulating material to provide insulation and isolation between the first main body 311 and the support member 20, and between the first main body 311 and the second main body 321, thereby increasing the creepage distance between the first busbar assembly 31 and the second busbar assembly 32 and improving the electrical safety performance of the electrical cabinet in this embodiment.

[0080] Accordingly, another embodiment of this application also provides an energy storage system, which includes the aforementioned electrical cabinet. The energy storage system will be described in detail below. For parts that are the same as or corresponding to the previous embodiment, please refer to the corresponding descriptions of the foregoing embodiments; they will not be repeated in detail below.

[0081] In some embodiments, the energy storage system includes:

[0082] Several battery clusters: A battery cluster is the core energy unit of an energy storage system, usually consisting of multiple battery modules connected in series.

[0083] Electrical cabinet: This electrical cabinet is the same as the one provided in Embodiment 1 above. The electrical cabinet is electrically connected to each battery cluster and external load (such as the energy storage converter PCS, the power grid, or load equipment).

[0084] In some embodiments, the energy storage system adopts a string architecture. The positive and negative output cables of each battery cluster are respectively connected to a pair of internal wiring sections of the wiring assembly 30 inside the electrical cabinet. Because the electrical cabinet in this embodiment adopts a double-layer three-dimensional layout of the wiring assembly 30, the energy storage system can accommodate more battery cluster access circuits in the limited internal space of the container, thereby significantly improving the energy density and integration of the energy storage system.

[0085] Accordingly, another embodiment of this application also provides an electrical device, which includes the aforementioned electrical cabinet. The energy storage system will be described in detail below. For parts that are the same as or corresponding to the previous embodiment, please refer to the corresponding descriptions of the foregoing embodiments; they will not be repeated in detail below.

[0086] In some embodiments, electrical equipment includes, but is not limited to, electric vehicles, ships, spacecraft, etc. Spacecraft may include, for example, airplanes, rockets, space shuttles, and spacecraft.

[0087] The electrical cabinet's staggered wiring structure greatly facilitates internal wiring for electrical equipment. In situations where the internal space of the equipment is limited and wiring is complex, operators can easily maintain or replace cables at the inner wiring points using tools, taking advantage of the spatial misalignment between the inner and outer busbars, without disassembling the outer structure. This independent maintenance access design significantly improves the maintainability of the equipment and reduces downtime for repairs in case of equipment failure.

[0088] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. An electrical cabinet, characterized in that, include: Cabinet frame; Support member, which is fixedly connected to the cabinet frame; A wiring assembly is disposed within the cabinet frame and at least partially surrounds the support member; the wiring assembly includes a first bus assembly and a second bus assembly, the first bus assembly and the second bus assembly are stacked, and the second bus assembly at least partially surrounds the first bus assembly; A connecting component, the connecting component including an elastic buffer, the connecting component fixing the first busbar component and the second busbar component to the support member or the cabinet frame through the elastic buffer; The first busbar assembly includes a plurality of first busbars arranged at intervals along a third direction. Each first busbar includes a first main body and first bent portions disposed at both ends of the first main body. The first main body extends along a first direction, and the first bent portions extend along a second direction. The first direction, the second direction, and the third direction intersect each other. The second busbar assembly includes a plurality of second busbars arranged at intervals along the third direction, and the second busbar includes a second main body and second bent portions disposed at both ends of the second main body; The second main body extends along the first direction, and the second bent portion extends along the second direction; The first main body portion and the second main body portion are spaced apart in the second direction, and the opposite first bent portion and the second bent portion are spaced apart in the first direction.

2. The electrical cabinet according to claim 1, characterized in that, The first bend and the second bend, which are adjacent to each other in the first direction, are arranged alternately along the third direction.

3. The electrical cabinet according to claim 1, characterized in that, The first bending portion includes a first external wiring portion and a first pair of internal wiring portions; the second bending portion includes a second external wiring portion and a second pair of internal wiring portions. Wherein, the ends of the first external wiring portion and the ends of the second external wiring portion are offset in the second direction, and the ends of the first internal wiring portion and the ends of the second internal wiring portion are offset in the second direction.

4. The electrical cabinet according to claim 3, characterized in that, The first pair of internal wiring sections is provided with a clearance section that avoids the bend of the second busbar assembly.

5. The electrical cabinet according to claim 1, characterized in that, The connecting assembly further includes a rigid limiting member, which passes through the elastic buffer member; the axial length of the rigid limiting member is less than the thickness of the elastic buffer member in its natural state, and greater than or equal to the thickness of the elastic buffer member in its maximum allowable compression state.

6. The electrical cabinet according to claim 1, characterized in that, The connection assembly further includes an insulating spacer disposed between the support member and the second busbar assembly, and between the first busbar assembly and the second busbar assembly; Wherein, the insulating spacer is disposed on the contact surface between the elastic buffer and the first busbar assembly and / or the second busbar assembly; or, the elastic buffer and the insulating spacer are integrally formed.

7. The electrical cabinet according to claim 1, characterized in that, The support member has ventilation holes, the positions of which correspond to the gaps between adjacent first busbars.

8. The electrical cabinet according to claim 3, characterized in that, All first buses are of first polarity, and all second buses are of second polarity, with the first polarity being opposite to the second polarity; The first external wiring part has a first mounting hole, and the second external wiring part has a second mounting hole, wherein the first mounting hole and the second mounting hole are different.

9. The electrical cabinet according to claim 1, characterized in that, The support member is a profile with an open slot structure; the connecting assembly includes a fastener, the head of which is accommodated inside the open slot structure, and the head of the fastener has an anti-rotation surface, which cooperates with the side wall of the open slot structure to restrict the rotation of the fastener.

10. The electrical cabinet according to any one of claims 1 to 9, characterized in that, The material of the elastic cushioning element includes at least one of silicone, rubber or polyurethane; And / or, the thickness of the elastic buffer is 1 mm to 5 mm.

11. An energy storage system, characterized in that, include: Several battery clusters; as well as The electrical cabinet as described in any one of claims 1 to 10, wherein the electrical cabinet is electrically connected to the battery cluster and the external load respectively.

12. An electrical appliance, characterized in that, The electrical equipment includes an electrical cabinet as described in any one of claims 1 to 10.

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