Energy storage box and energy storage system

Abstract

This utility model provides an energy storage box and an energy storage system. The energy storage box includes: a box body, comprising a base plate component, a frame detachably connected to the base plate component, and a top plate component, a left side plate component, a right side plate component, a front door plate component, and a rear door plate component, all detachably mounted on the frame. The frame is a splicing structure. A battery rack assembly includes multiple battery racks, which are divided into at least one A-phase battery rack, at least one B-phase battery rack, and at least one C-phase battery rack. The A-phase battery rack carries the A-phase energy storage power module, the B-phase battery rack carries the B-phase energy storage power module, and the C-phase battery rack carries the C-phase energy storage power module. The A-phase, B-phase, and C-phase battery racks are all located inside the box body and detachably mounted on the base plate component. The technical solution of this utility model solves the problems of large footprint and difficult transportation in existing energy storage systems due to phase-separated layouts.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage, high-capacity energy storage technology, and more specifically, to an energy storage box and an energy storage system. Background Technology

[0002] High-voltage cascaded energy storage systems have become the mainstream technology in the medium-voltage energy storage field due to their advantages such as eliminating the need for step-up transformers, high conversion efficiency, and fast dynamic response. However, for the system integration of a specific large capacity level of 18.8MWh, existing technologies generally adopt a layout of separate independent enclosures for the A, B, and C phases, which leads to low system integration. Specifically, the three phases need to be hoisted separately and connected across enclosures to form cascaded copper busbars, which not only occupies a large area but also exposes the cascaded copper busbars between the three phases to the outside, posing a risk of short circuits and construction safety hazards.

[0003] In addition, most current energy storage containers adopt an integral welded frame structure. Because the width of the container exceeds the national standard road transport limit (≥3.5m), it cannot be transported by road. At the same time, the maintenance of internal equipment requires large-scale disassembly, resulting in low maintenance efficiency and high maintenance costs. Therefore, the integral welded structure restricts transportation and maintenance. Utility Model Content

[0004] The main purpose of this utility model is to provide an energy storage box and energy storage system to solve the problems of large footprint and transportation difficulties in the existing energy storage system due to phase arrangement.

[0005] To achieve the above objectives, this utility model provides an energy storage box, comprising: a box body, including a bottom plate component, a frame detachably connected to the bottom plate component, and a top plate component, a left side plate component, a right side plate component, a front door plate component, and a rear door plate component, all detachably mounted on the frame, the frame being a splicing structure; and a battery rack assembly, including multiple battery racks, the multiple battery racks being divided into at least one A-phase battery rack, at least one B-phase battery rack, and at least one C-phase battery rack, the A-phase battery rack being used to carry A-phase energy storage power modules, the B-phase battery rack being used to carry B-phase energy storage power modules, and the C-phase battery rack being used to carry C-phase energy storage power modules, the A-phase battery rack, the B-phase battery rack, and the C-phase battery rack being located inside the box body and detachably mounted on the bottom plate component.

[0006] Furthermore, along the width direction of the enclosure, the bottom plate component has a first region and a second region spaced apart. There are multiple A-phase battery racks, which are located in the first region and spaced apart along the length direction of the enclosure. There are multiple C-phase battery racks, which are located in the second region and spaced apart along the length direction. The multiple A-phase battery racks in the first region and the multiple C-phase battery racks in the second region are arranged back to back.

[0007] Furthermore, the base plate component also has a third region. Along the length direction, the first region and the second region are located on one side of the third region. There are multiple B-phase battery racks located in the third region. The multiple B-phase battery racks are arranged in two rows along the width direction, and the two rows of B-phase battery racks are set back to back.

[0008] Furthermore, the number of B-phase battery racks is at least three, and the number of B-phase battery racks in one row of the two rows of B-phase battery racks is less than the number of B-phase battery racks in the other row of the two rows of B-phase battery racks, so that the at least three B-phase battery racks are arranged in an L-shape.

[0009] Furthermore, the battery rack assembly also includes a limiting member, which is provided between two adjacent battery racks in the plurality of battery racks to limit the spacing between the two adjacent battery racks. The limiting member is made of an insulating material.

[0010] Furthermore, the A-phase energy storage power module, the B-phase energy storage power module, and the C-phase energy storage power module all include power units and battery clusters connected to the power units. At least one of the A-phase battery rack, the B-phase battery rack, and the C-phase battery rack includes: an upper support for supporting the power units and the battery clusters corresponding to the power units; an insulating component; and a lower support for supporting the power units and the battery clusters corresponding to the power units. The upper support and the lower support are arranged vertically, and the insulating component is located between the upper support and the lower support and can electrically isolate the upper support and the lower support.

[0011] Furthermore, the power units on the upper support are located at the bottom of the upper support, and the power units on the lower support are located at the top of the lower support, so that the power units on the upper support are adjacent to the power units on the lower support.

[0012] Furthermore, the insulating component includes an insulating isolation plate and multiple connecting insulating plates. The insulating isolation plate is located between the upper support and the lower support, and the connecting insulating plates are used to connect the upper support and the lower support. The multiple connecting insulating plates are arranged circumferentially along the insulating isolation plate.

[0013] Furthermore, the base plate component includes a connector and two base plate components, which are arranged along the width direction of the box body. One of the two base plate components is detachably connected to one end of the connector, and the other of the two base plate components is detachably connected to the other end of the connector.

[0014] Furthermore, the base plate component is provided with multiple positioning components, and the frame includes a top frame and multiple columns. The multiple columns are set one-to-one with the multiple positioning components. The first end of each column is detachably connected to the top frame, and the second end of each column is positioned and engaged with the corresponding positioning component and is detachably connected to the base plate component.

[0015] Furthermore, the second end of the column is provided with a connecting plate, which is provided with multiple locking parts. The locking parts pass through the connecting plate and are detachably connected to the base plate component. A potting compound is provided between the connecting plate and the base plate component.

[0016] Furthermore, at least one of the left and right panels includes multiple splicing plates, which are arranged sequentially along the width direction of the box body, and adjacent splicing plates have a concave-convex fit on their opposing sides.

[0017] According to another aspect of the present invention, the present invention provides an energy storage system, including an A-phase energy storage power module, a B-phase energy storage power module, a C-phase energy storage power module, and the aforementioned energy storage box.

[0018] By applying the technical solution of this utility model, the three-phase battery rack components (A, B, and C) are integrated into a single enclosure. A weld-free modular structure, consisting of a base plate, a detachable splicing frame, and multiple detachable panels (top plate, left side plate, right side plate, front door plate, and rear door plate), is adopted. This eliminates the need for cross-enclosure hoisting and external cascaded copper busbar wiring, which are necessary for traditional separate three-phase enclosures. Furthermore, it avoids short circuits caused by exposed cascaded copper busbars outside the enclosure. This design reduces road risks and safety hazards associated with working at heights, while also reducing the footprint to increase capacity density per unit area, thereby improving system integration. Furthermore, due to the modular frame structure, each panel is detachably connected to the frame and base plate components for weld-free assembly. This allows the enclosure to be disassembled into multiple parts for easy transport, and all components can be disassembled independently. During maintenance, only partial disassembly or opening of the corresponding front or rear door panels is required to access the internal equipment, eliminating the need for overall cutting or large-scale disassembly, significantly shortening maintenance cycles and reducing labor and time costs. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of an embodiment of the energy storage system of this utility model is shown;

[0021] Figure 2 It shows Figure 1 A schematic diagram of the exploded structure of an energy storage system;

[0022] Figure 3 It shows Figure 2 A partially enlarged view of an embodiment of a splicing panel for an energy storage system;

[0023] Figure 4 It shows Figure 2 A partially enlarged view of another embodiment of the splicing panel of the energy storage system;

[0024] Figure 5 It shows Figure 1 A partial structural diagram of an energy storage system;

[0025] Figure 6 It shows Figure 5 A top view of the energy storage system;

[0026] Figure 7 It shows Figure 1 A schematic diagram of the base plate components and frame of the energy storage system;

[0027] Figure 8 It shows Figure 7 A magnified view of a portion of the energy storage system at point D;

[0028] Figure 9 It shows Figure 7 A magnified view of a portion of the energy storage system at point E;

[0029] Figure 10 It shows Figure 7 A magnified view of a portion of the energy storage system at point F;

[0030] Figure 11 It shows Figure 7 A schematic diagram of the exploded structure of the base plate components and frame of the energy storage system;

[0031] Figure 12 It shows Figure 11 A partial enlarged view of the base plate components of the energy storage system;

[0032] Figure 13 It shows Figure 11 A schematic diagram of the structure of the base plate components of the energy storage system;

[0033] Figure 14 It shows Figure 13 Left view of the base plate component;

[0034] Figure 15 It shows Figure 2 A schematic diagram of the battery rack structure of the energy storage system.

[0035] The above figures include the following reference numerals:

[0036] 1. First area; 2. Second area; 3. Third area; 10. Box body; 11. Base plate component; 111. Connector; 112. Base plate component; 113. Positioning component; 12. Frame; 121. Top frame; 122. Column; 123. Connecting plate component; 13. Top plate component; 14. Left side plate component; 141. Splicing plate; 15. Right side plate component; 16. Front door plate component; 17. Rear door plate component; 20. Battery rack; 21. A-phase battery rack; 211. Upper support; 212. Insulating component; 213. Lower support; 2121. Isolation insulation board; 2122. Connecting insulation board; 22. B-phase battery rack; 23. C-phase battery rack; 30. Limiting component; 41. Power unit; 42. Battery cluster; 51. Longitudinal beam; 52. Crossbeam; 53. Corner connector; 54. Reinforcing beam. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the length direction X, width direction Y, and height direction Z of the box 10 are set at angles to each other.

[0039] like Figures 1 to 15 As shown, an embodiment of this utility model provides an energy storage box, including: a box body 10, including a bottom plate component 11, a frame 12 detachably connected to the bottom plate component 11, and a top plate component 13, a left side plate component 14, a right side plate component 15, a front door plate component 16, and a rear door plate component 17, all detachably mounted on the frame 12, the frame 12 being a splicing structure; and a battery rack assembly, including multiple battery racks 20, the multiple battery racks 20 being divided into at least one A-phase battery rack 21, at least one B-phase battery rack 22, and at least one C-phase battery rack 23, the A-phase battery rack 21 being used to carry A-phase energy storage power modules, the B-phase battery rack 22 being used to carry B-phase energy storage power modules, and the C-phase battery rack 23 being used to carry C-phase energy storage power modules, the A-phase battery rack 21, the B-phase battery rack 22, and the C-phase battery rack 23 being all located inside the box body 10 and detachably mounted on the bottom plate component 11.

[0040] In the above technical solution, by integrating the A, B, and C three-phase battery rack components into a single enclosure and employing a weld-free modular structure consisting of a base plate component 11, a detachable splicing frame 12, and multiple detachable panels (top plate 13, left side plate 14, right side plate 15, front door plate 16, and rear door plate 17), when all three-phase battery racks are placed in the same enclosure and detachably fixed to the base plate component 11, the cross-enclosure hoisting and external cascaded copper busbar wiring required by traditional three-phase separate enclosures can be avoided. This also prevents the problems caused by exposed cascaded copper busbars outside the enclosure. This design reduces the risk of short circuits and safety hazards associated with working at heights, while also reducing the footprint to increase the capacity density per unit area, thereby improving system integration. Furthermore, since the frame 12 is a modular structure, each panel is detachably connected to the frame and base plate components 11 for weld-free assembly. This allows the enclosure to be disassembled into multiple parts for easy transport, and all components can be disassembled independently. During maintenance, only the corresponding front door panel 16 or rear door panel 17 needs to be partially opened to access the internal equipment, eliminating the need for overall cutting or large-scale disassembly, significantly shortening the maintenance cycle and reducing labor and time costs.

[0041] It should be noted that the bottom plate component 11, top plate component 13, left side plate component 14, right side plate component 15, front door plate component 16 and rear door plate component 17 are all connected to the frame by bolts and / or screws, without any on-site welding process.

[0042] like Figures 1 to 15 As shown in the embodiment of this utility model, along the width direction Y of the housing 10, the bottom plate component 11 has a first region 1 and a second region 2 arranged at intervals. There are multiple A-phase battery racks 21, which are located in the first region 1 and arranged at intervals along the length direction X of the housing 10. There are multiple C-phase battery racks 23, which are located in the second region 2 and arranged at intervals along the length direction X. The multiple A-phase battery racks 21 on the first region 1 and the multiple C-phase battery racks 23 on the second region 2 are arranged back to back.

[0043] In the above technical solution, by arranging multiple A-phase battery racks 21 and multiple C-phase battery racks 23 in the first area 1 and the second area 2 spaced apart in the width direction Y of the enclosure 10, and setting them back to back, the front of the A-phase battery racks 21 and the C-phase battery racks 23, i.e. the power module mounting surface and the wiring port side, can face the front door panel 16 or the rear door panel 17 on both sides of the enclosure, while the back, i.e. the side without electrical interface, faces each other directly. This avoids reserving an intermediate maintenance channel between the first area 1 and the second area 2, so as to maximize the compression of the longitudinal space occupied inside the enclosure without reducing the electrical safety distance.

[0044] In one embodiment, both the front door panel 16 and the rear door panel 17 include at least two door panels, one side of which is pivotally connected to the frame via a hinge, so that both the front door panel 16 and the rear door panel 17 are openable and closable to facilitate the maintenance of the energy storage power module inside the enclosure.

[0045] In one embodiment, the number of multiple A-phase battery racks 21 and multiple C-phase battery racks 23 are the same, and they are arranged in a one-to-one correspondence.

[0046] like Figures 1 to 15 As shown in the embodiment of this utility model, the base plate component 11 also has a third region 3. Along the length direction X, the first region 1 and the second region 2 are located on one side of the third region 3. There are multiple B-phase battery racks 22. The multiple B-phase battery racks 22 are located in the third region 3. The multiple B-phase battery racks 22 are arranged in two rows along the width direction Y. The two rows of B-phase battery racks 22 are arranged back to back.

[0047] In the above technical solution, by centrally setting the B-phase battery rack 22 in the third region 3 of the base plate component 11 and arranging it back-to-back in two rows along the width direction Y of the box, the electrical interface end of the B-phase energy storage power module can face the front door panel 16 and the rear door panel 17 of the box. This avoids the need to reserve redundant space for the transverse passage between the two rows for the maintenance of the B-phase energy storage power module, thereby achieving a high-density arrangement of the B-phase energy storage power module in a limited longitudinal space without increasing the width occupation.

[0048] like Figures 1 to 15 As shown in the embodiment of this utility model, the number of B-phase battery racks 22 is at least three, and the number of B-phase battery racks 22 in one row of the two rows of B-phase battery racks 22 is less than the number of B-phase battery racks 22 in the other row of the two rows of B-phase battery racks 22, so that the at least three B-phase battery racks 22 are arranged in an L-shape.

[0049] In the above technical solution, compared with the three-column side-by-side layout, this application adopts a layout with long columns on both sides and a short column at one end, and arranges the B-phase battery racks 22 in an L-shape. In this way, electrical cabinets can be set in the row with a smaller number of B-phase battery racks 22 in the two rows of B-phase battery racks 22, so as to make full use of the space at the end of the box and optimize the space utilization rate.

[0050] like Figures 1 to 15 As shown in the embodiment of the present invention, the battery rack assembly further includes a limiting member 30. A limiting member 30 is provided between two adjacent battery racks 20 in the plurality of battery racks 20 to limit the interval distance between the two adjacent battery racks 20. The limiting member 30 is made of insulating material.

[0051] In the above technical solution, by setting a limiting member 30 made of insulating material between two adjacent battery racks 20 in the multiple battery racks 20, the relative displacement of adjacent battery racks 20 can be constrained during the assembly process to ensure that their spacing meets the safety requirements of electrical clearance of the energy storage system. This can avoid the problem of excessively large or small spacing caused by operation error, experience difference or construction fatigue in traditional manual measurement and visual positioning. It can also avoid the problem of reduced energy density due to increased box volume caused by excessive spacing, and the problem of discharge breakdown caused by insufficient spacing.

[0052] It should be noted that in this application, a limiting member 30 is provided between two adjacent A-phase battery racks 21, between two adjacent B-phase battery racks 22, and between two adjacent C-phase battery racks 23. Furthermore, a limiting member 30 is provided between an A-phase battery rack 21 and a C-phase battery rack 23 arranged back-to-back with it, a limiting member 30 is provided between an A-phase battery rack 21 and an adjacent B-phase battery rack 22, and a limiting member 30 is provided between a C-phase battery rack 23 and an adjacent B-phase battery rack 22.

[0053] In one embodiment, the limiting member 30 is an insulating post with a length of not less than 150mm, so that the distance between two adjacent battery racks 20 is not less than 150mm, thus eliminating the need to add an additional separator or significantly increase the phase spacing.

[0054] Integrating three phases into a single enclosure saves space, but the electrical clearance requirements between phases are strict at the 10kV voltage level. At the same time, the high-density power units generate concentrated heat, and simply increasing the spacing would significantly increase the volume. Therefore, by setting a limiting member 30 made of insulating material, compactness, safety, and maintainability can be balanced. In addition, the energy storage box also includes liquid cooling pipes installed inside the box to dissipate heat from the energy storage power modules. The liquid cooling pipes are made of insulating material, so there is no need to consider the insulation clearance between them and the battery rack 20, thus achieving effective heat dissipation.

[0055] like Figures 1 to 15As shown in the embodiment of this utility model, the A-phase energy storage power module, the B-phase energy storage power module, and the C-phase energy storage power module all include a power unit 41 and a battery cluster 42 connected to the power unit 41. At least one of the A-phase battery rack 21, the B-phase battery rack 22, and the C-phase battery rack 23 includes: an upper support 211 for supporting the power unit 41 and the battery cluster 42 corresponding to the power unit 41; an insulating member 212; and a lower support 213 for supporting the power unit 41 and the battery cluster 42 corresponding to the power unit 41. The upper support 211 and the lower support 213 are arranged vertically, and the insulating member 212 is located between the upper support 211 and the lower support 213 and can electrically isolate the upper support 211 and the lower support 213. In this way, by setting the insulating member 212 between the upper support 211 and the lower support 213, electrical isolation between the upper and lower energy storage power modules can be achieved.

[0056] It should be noted that the A-phase energy storage power module includes an A-phase power unit 41 and a battery cluster 42 connected to the A-phase power unit 41; the B-phase energy storage power module includes a B-phase power unit 41 and a battery cluster 42 connected to the B-phase power unit 41; and the C-phase energy storage power module includes a C-phase power unit 41 and a battery cluster 42 connected to the C-phase power unit 41.

[0057] like Figures 1 to 15 As shown, in this embodiment of the present invention, the power unit 41 on the upper support 211 is located at the bottom of the upper support 211, and the power unit 41 on the lower support 213 is located at the top of the lower support 213, so that the power unit 41 on the upper support 211 and the power unit 41 on the lower support 213 are adjacent to each other.

[0058] In the above technical solution, by placing the power unit 41 on the bottom of the upper bracket 211 and the power unit 41 on the top of the lower bracket 213, the two power units 41 can be directly adjacent in the height direction Z of the enclosure, and the electrical connection end faces (i.e., cascade busbar interfaces) of the two power units 41 are located on the same side, i.e. facing the front door panel 16 or the rear door panel 17. This provides a unidirectional routing path for the cascaded copper busbars, so that there is no need for additional bending or crossing of space to connect the cascaded copper busbars. This avoids the problems of horizontal cross-phase routing, copper busbar detour and spatial interference caused by inconsistent port orientation in traditional flat or staggered arrangements, thereby avoiding cross-phase crossing and reducing the risk of short circuit.

[0059] It should be noted that the battery rack 20, power unit 41 and battery pack can be pre-assembled into independent functional modules in the factory. On-site, they only need to be hoisted into place and fixed with the frame bolts, which can shorten the on-site construction cycle. The assembly sequence of the whole compartment is as follows: bottom plate component 11 → frame → pre-integrated battery rack module → left side plate 14 and right side plate 15 → top plate 13 → front door plate 16 and rear door plate 17. The on-site construction time is reduced by more than 60% compared with the traditional solution.

[0060] like Figure 15 As shown, both the upper support 211 and the lower support 213 are formed by welding together multiple horizontal tubes, multiple vertical tubes and multiple vertical tubes.

[0061] like Figures 1 to 15 As shown in the embodiment of this utility model, the insulating component 212 includes an isolation insulating plate 2121 and a plurality of connecting insulating plates 2122. The isolation insulating plate 2121 is located between the upper support 211 and the lower support 213. The connecting insulating plates 2122 are used to connect the upper support 211 and the lower support 213. The plurality of connecting insulating plates 2122 are arranged circumferentially along the isolation insulating plate 2121.

[0062] In the above technical solution, the isolation insulation plate 2121 serves as the main electrical isolation layer, directly blocking the high-voltage potential conduction path between the upper and lower power units to ensure interlayer insulation safety. Meanwhile, multiple connecting insulation plates 2122 are evenly arranged along its circumference, not only bearing the mechanical connection between the upper and lower supports, but also dispersing the load and enhancing the structural rigidity to avoid insulation gap failure caused by support deformation due to vibration.

[0063] In one embodiment, both the insulating plate 2121 and the connecting insulating plate 2122 are made of SMC (sheet molding compound).

[0064] like Figures 1 to 15 As shown in the embodiment of this utility model, the base plate component 11 includes a connector 111 and two base plate components 112. The two base plate components 112 are arranged along the width direction Y of the box body 10. One of the two base plate components 112 is detachably connected to one end of the connector 111, and the other base plate component 112 is detachably connected to the other end of the connector 111. In this way, during transportation, the base plate component 11 can be disassembled into two base plate components 112, and the two base plate components 112 can be stacked together for transportation, thereby reducing the width dimension during transportation and facilitating transportation.

[0065] In one embodiment, the connector 111 has a plurality of elongated holes, and bolts pass through the elongated holes to be threadedly connected to the base plate 112 to achieve a detachable connection between the base plate 112 and the connector 111.

[0066] like Figures 1 to 15As shown in the embodiment of this utility model, the base plate component 11 is provided with a plurality of positioning components 113, the frame 12 includes a top frame 121 and a plurality of columns 122, the plurality of columns 122 are arranged in a one-to-one correspondence with the plurality of positioning components 113, the first end of each column 122 is detachably connected to the top frame 121, and the second end of each column 122 is positioned and engaged with the corresponding positioning component 113 and is detachably connected to the base plate component 11.

[0067] In the above technical solution, by setting multiple positioning parts 113 on the base plate component 11, and positioning the second end of the column 122 of the frame 12 with the positioning parts 113 and detachably connecting the first end with the top frame 121, the positioning parts 113 can ensure the installation position of each column 122, thereby avoiding the cumulative errors and structural deformation caused by traditional on-site marking, drilling, and welding, and can also achieve rapid assembly. At the same time, since the column 122 is detachably connected to the base plate component 11 and the top frame 121, no welding is required, which facilitates disassembly and transportation.

[0068] In one embodiment, the positioning element 113 is a positioning tube and the column is a hollow tube. Each positioning element 113 has a filling block on its outer periphery. In this way, when the positioning element 113 is inserted into the column, the filling block can fill the gap between the inner wall of the column and the positioning element 113 to prevent the column from shaking during installation.

[0069] In one embodiment, such as Figure 7 and Figure 8 As shown, the frame also includes corner connectors 53. The top frame 121 includes two longitudinal beams 51 and multiple crossbeams 52 connected between the two longitudinal beams. The multiple crossbeams 52 are arranged at intervals along the length direction X. Each crossbeam 52 has a column 122 at both ends. The corner connectors 53 are welded to the longitudinal beams 51. Bolts pass through the corner connectors 53 and connect to the ends of the crossbeams 52. Bolts pass through the corner connectors 53 and connect to the columns 122, so that the ends of the crossbeams 52 and the ends of the columns 122 are connected to the longitudinal beams 51 through the corner connectors 53. The positioning member 113 is welded to the base plate member 11.

[0070] In one embodiment, such as Figure 7 and Figure 9 As shown, multiple reinforcing beams 54 are provided between two adjacent crossbeams 52. The multiple reinforcing beams 54 are spaced apart along the width direction Y, and the reinforcing beams 54 are connected to the crossbeams 52 by bolts.

[0071] like Figures 1 to 15As shown in the embodiment of this utility model, the second end of the column 122 is provided with a connecting plate 123, and the connecting plate 123 is provided with a plurality of locking members. The locking members pass through the connecting plate 123 and are detachably connected to the base plate component 11. A potting compound is provided between the connecting plate 123 and the base plate component 11. In this way, a seal can be achieved to achieve the effect of waterproofing the bottom.

[0072] In one embodiment, the locking element is a bolt.

[0073] It should be noted that after the bolts are tightened, the glue is poured in and cured to form a rigid sealed connection. When disassembling, the glue can be softened by heating and then disassembled without damage, which supports secondary migration or expansion of the system.

[0074] like Figures 2 to 4 As shown in the embodiment of this utility model, at least one of the left side panel 14 and the right side panel 15 includes a plurality of splicing plates 141. The plurality of splicing plates 141 are arranged sequentially along the width direction Y of the box body 10, and the opposing sides of two adjacent splicing plates 141 are in a concave-convex fit. In this way, under the premise of facilitating transportation, the concave-convex fit can achieve positioning, so as to assemble the plurality of splicing plates 141 into the left side panel 14 or the right side panel 15, thereby improving assembly efficiency.

[0075] In one embodiment, potting compound is provided on the opposing sides of two adjacent splicing panels 141 to achieve waterproofing.

[0076] In one embodiment, such as Figure 3 As shown, one of the two adjacent splicing plates 141 has a groove, and the other of the two adjacent splicing plates 141 has a protrusion. The protrusion and the groove cooperate to achieve a concave-convex fit.

[0077] In another embodiment, such as Figure 4 As shown, the splicing plate 141 is formed by bending sheet metal. One of two adjacent splicing plates 141 is provided with a groove and a protrusion, and the other of two adjacent splicing plates 141 is provided with a protrusion and a groove. In this way, a concave-convex fit can be achieved.

[0078] In one embodiment, the base plate component is provided with a guide mounting groove that extends along the width direction. This allows for easy installation when installing multiple splice panels 141. The splice panel 141 can be first installed within the guide mounting groove, then pushed to one side along the width direction before installing the next splice panel 141. Specifically, there are two guide mounting grooves, corresponding to the left side panel 14 and the right side panel 15, respectively.

[0079] It should be noted that the external dimensions of the enclosure are 9600mm×5200mm×5600mm, the floor space of a single compartment is no more than 50m², and the integrated capacity is 18.8MWh.

[0080] like Figure 1 As shown, an embodiment of this utility model also provides an energy storage system, including an A-phase energy storage power module, a B-phase energy storage power module, a C-phase energy storage power module, and the aforementioned energy storage box.

[0081] In one embodiment, each of the first region 1, the second region 2, and the third region 3 contains 10 power units, which are arranged in five battery racks 20 in a two-layer stacked configuration. Each power unit 41 is connected to two battery clusters, and each battery cluster 42 includes three battery packs, forming a "one-to-two" battery-power unit coupling structure. This reduces the total length of DC-side cables and lowers losses. This arrangement increases the power unit density within the phase region by approximately 30% at a 10kV voltage level, while also meeting electrical clearance requirements.

[0082] The energy storage system described above has all the advantages of the energy storage box described above, which will not be repeated here.

[0083] It should be noted that the energy storage system in this application specifically relates to an 18.8MWh / 10kV high-voltage cascaded energy storage system, and more particularly to an energy storage system structure that integrates three-phase power units A, B, and C into a single modular enclosure.

[0084] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: By integrating the A, B, and C three-phase battery rack components into a single box, and adopting a weld-free modular structure composed of a base plate component, a detachable splicing frame, and multiple detachable panels (top plate, left side plate, right side plate, front door plate, and rear door plate), when the three-phase battery racks are all placed in the same box and detachably fixed to the base plate component, the cross-box hoisting and external cascaded copper busbar wiring required by traditional three-phase separate boxes can be avoided, thus avoiding the need for cascaded copper busbar wiring. The exposed enclosure reduces the risk of short circuits and safety hazards associated with working at heights, while also reducing the footprint and increasing the capacity density per unit area, thereby improving system integration. Furthermore, due to the modular frame structure, each panel is detachably connected to the frame and base plate components for weld-free assembly. This allows the enclosure to be disassembled into multiple parts for easy transport, and all components can be disassembled independently. During maintenance, only partial disassembly or opening of the corresponding front or rear door panels is required to access the internal equipment, eliminating the need for overall cutting or large-scale disassembly, significantly shortening maintenance cycles and reducing labor and time costs.

[0085] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy storage tank, characterized by, include: The box body (10) includes a bottom plate component (11), a frame (12) detachably connected to the bottom plate component (11), and a top plate component (13), a left side plate component (14), a right side plate component (15), a front door plate component (16), and a rear door plate component (17) detachably mounted on the frame (12). The frame (12) is a splicing structure. The battery rack assembly includes multiple battery racks (20), which are divided into at least one A-phase battery rack (21), at least one B-phase battery rack (22), and at least one C-phase battery rack (23). The A-phase battery rack (21) is used to carry the A-phase energy storage power module, the B-phase battery rack (22) is used to carry the B-phase energy storage power module, and the C-phase battery rack (23) is used to carry the C-phase energy storage power module. The A-phase battery rack (21), B-phase battery rack (22), and C-phase battery rack (23) are all located inside the housing (10) and are detachably mounted on the base plate component (11).

2. The energy storage tank of claim 1, wherein, Along the width direction (Y) of the housing (10), the bottom plate component (11) has a first region (1) and a second region (2) spaced apart. There are multiple A-phase battery racks (21), which are located in the first region (1) and spaced apart along the length direction (X) of the housing (10). There are multiple C-phase battery racks (23), which are located in the second region (2) and spaced apart along the length direction (X). The multiple A-phase battery racks (21) on the first region (1) and the multiple C-phase battery racks (23) on the second region (2) are arranged back to back.

3. The energy storage tank of claim 2, wherein, The base plate component (11) also has a third region (3). Along the length direction (X), the first region (1) and the second region (2) are located on one side of the third region (3). There are multiple B-phase battery racks (22). Multiple B-phase battery racks (22) are located in the third region (3). Multiple B-phase battery racks (22) are arranged in two rows along the width direction (Y). The two rows of B-phase battery racks (22) are arranged back to back.

4. The energy storage box according to claim 3, characterized in that, The number of the B-phase battery racks (22) is at least three, and the number of the B-phase battery racks (22) in one row of the two rows of the B-phase battery racks (22) is less than the number of the B-phase battery racks (22) in the other row of the two rows of the B-phase battery racks (22), so that the at least three B-phase battery racks (22) are arranged in an L-shape.

5. The energy storage box according to claim 3, characterized in that, The battery rack assembly also includes a limiting member (30), which is provided between two adjacent battery racks (20) to limit the spacing between the two adjacent battery racks (20). The limiting member (30) is made of insulating material.

6. The energy storage box according to any one of claims 1 to 5, characterized in that, The A-phase energy storage power module, the B-phase energy storage power module, and the C-phase energy storage power module all include a power unit (41) and a battery cluster (42) connected to the power unit (41). At least one of the A-phase battery rack (21), the B-phase battery rack (22), and the C-phase battery rack (23) includes: The upper support (211) is used to support the power unit (41) and the battery cluster (42) corresponding to the power unit (41). Insulating component (212); The lower support (213) is used to carry the power unit (41) and the battery cluster (42) corresponding to the power unit (41). The upper support (211) and the lower support (213) are arranged vertically. The insulating member (212) is located between the upper support (211) and the lower support (213) and can electrically isolate the upper support (211) and the lower support (213).

7. The energy storage box according to claim 6, characterized in that, The power unit (41) on the upper support (211) is located at the bottom of the upper support (211), and the power unit (41) on the lower support (213) is located at the top of the lower support (213), so that the power unit (41) on the upper support (211) is adjacent to the power unit (41) on the lower support (213).

8. The energy storage box according to claim 6, characterized in that, The insulating component (212) includes an insulating isolation plate (2121) and a plurality of connecting insulating plates (2122). The insulating isolation plate (2121) is located between the upper support (211) and the lower support (213). The connecting insulating plates (2122) are used to connect the upper support (211) and the lower support (213). The plurality of connecting insulating plates (2122) are arranged circumferentially along the insulating isolation plate (2121).

9. The energy storage box according to any one of claims 1 to 5, characterized in that, The base plate component (11) includes a connector (111) and two base plate components (112). The two base plate components (112) are arranged along the width direction (Y) of the box body (10). One of the two base plate components (112) is detachably connected to one end of the connector (111), and the other of the two base plate components (112) is detachably connected to the other end of the connector (111).

10. The energy storage box according to any one of claims 1 to 5, characterized in that, The base plate component (11) is provided with a plurality of positioning components (113). The frame (12) includes a top frame (121) and a plurality of columns (122). The plurality of columns (122) are provided in a one-to-one correspondence with the plurality of positioning components (113). The first end of each column (122) is detachably connected to the top frame (121), and the second end of each column (122) is positioned and engaged with the corresponding positioning component (113) and detachably connected to the base plate component (11).

11. The energy storage box according to claim 10, characterized in that, The second end of the column (122) is provided with a connecting plate (123), and the connecting plate (123) is provided with a plurality of locking parts. The locking parts pass through the connecting plate (123) and are detachably connected to the base plate component (11). A potting compound is provided between the connecting plate (123) and the base plate component (11).

12. The energy storage box according to any one of claims 1 to 5, characterized in that, At least one of the left side panel (14) and the right side panel (15) includes a plurality of splicing plates (141), which are arranged sequentially along the width direction (Y) of the box body (10), and adjacent splicing plates (141) are in a concave-convex fit with each other on the opposite sides.

13. An energy storage system, characterized in that, It includes the A-phase energy storage power module, the B-phase energy storage power module, the C-phase energy storage power module, and the energy storage box according to any one of claims 1 to 12.

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