Energy storage cabinet, energy storage system, battery pack, and battery support

Abstract

Provided are an energy storage cabinet (100), an energy storage system, a battery pack (200), and a battery support. The energy storage cabinet (100) comprises a cabinet body (110), a battery pack (200), and two guide rails (140) arranged opposite one another in the length direction (X) of the cabinet body (110). The cabinet body (110) is used for accommodating the guide rails (140) and the battery pack (200), the cabinet body (110) is provided with a cabinet door, and the two guide rails (140) extend in the width direction (Y) of the cabinet body (110). Each guide rail (140) among the two guide rails (140) is provided with a recess (141) extending in the width direction (Y), and the opening directions of the recesses (141) are opposite one another and face the interior of the cabinet body (110). The opening widths of the recesses (141) of the guide rails (140) at an end close to the cabinet door in the height direction (Z) of the cabinet body (110) are greater than the opening widths of the recesses (141) at the other end of the guide rails (140), and the surfaces of two side walls of the battery pack (200) are provided with protruding limiting blocks (220). The limiting blocks (220) are engaged in the recesses (141), and parts in the recesses (141) at narrowed opening widths are used for pressing against the limiting blocks (220) in the width direction (Y). The guide rails (140) can provide constraint in the width direction (Y) for the battery pack (200), limit the displacement of the battery pack (200) in the horizontal direction, and can prevent damage to the battery pack (200) and the energy storage cabinet (100) due to vibration during transportation of the battery pack (200).

Description

Energy storage cabinets, energy storage systems, battery packs and battery racks

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on December 26, 2023, with application number 202323560749.5 and application name “Energy Storage Cabinet, Energy Storage System, Battery Pack and Battery Bracket”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of energy, and in particular to an energy storage cabinet, an energy storage system, a battery pack, and a battery bracket. Background Art

[0004] Energy storage cabinets, energy storage boxes, and other products are gradually evolving toward higher energy density. Consequently, the number of cells in a single energy storage battery pack is increasing, and so are the size and weight of a single energy storage battery pack. Energy storage battery packs are typically longer than 2 meters and weigh over 700 kg. Due to their large size and weight, the battery packs generate significant vibration and impact forces on the energy storage cabinet body or battery pack mounting frame during transport.

[0005] The guide rails on the energy storage cabinet or battery pack mounting rack typically secure the battery pack at the front, lacking restraint at the rear and middle sections of the battery pack. With heavy battery packs, the guide rails lack sufficient support, preventing vibration during transport from damaging the battery pack and the energy storage cabinet.

[0006] Utility Model Content

[0007] The present application provides an energy storage cabinet, an energy storage system, a battery pack, and a battery bracket. By arranging guide rails containing accommodating spaces of different shapes in the energy storage cabinet, a restraining force in the width direction is provided to the battery pack to prevent the vibration of the battery pack from causing damage to the battery pack and the energy storage cabinet.

[0008] In a first aspect, the present application provides an energy storage cabinet, which includes a cabinet body, a battery pack, and two guide rails arranged opposite to each other along the length direction of the cabinet body. The cabinet body is used to accommodate the guide rails and the battery pack. The cabinet body is provided with a cabinet door, and the two guide rails extend along the width direction of the cabinet body. Each of the two guide rails is provided with a groove extending along the width direction, and the opening directions of the grooves are opposite and face the inside of the cabinet body. The opening width of the guide rail groove near one end of the cabinet door along the height direction of the cabinet body is greater than the opening width of the groove at the other end of the guide rail. The surface of the two side walls of the battery pack is provided with protruding limit blocks, which are stuck in the grooves. The portion of the groove where the opening width narrows is used to support the limit blocks in the width direction.

[0009] In the technical solution provided by this application, after the battery pack is pushed into the energy storage cabinet, the stoppers on the side walls of the battery pack can be locked into the grooves of the energy storage cabinet's guide rails. The portion of the groove where the opening width narrows abuts the stoppers in the width direction. The guide rails provide width constraints for the battery pack, limiting its displacement along the width direction. This solves the problem of securing the battery pack during transportation and prevents damage to the battery pack and the energy storage cabinet caused by vibration during transportation.

[0010] In one possible embodiment, the orthographic projection of the groove in the longitudinal direction is a stepped shape, and the orthographic projection of the stopper in the longitudinal direction is also a stepped shape. The shapes of the stopper and the groove match each other, which facilitates the locking of the stopper of the battery pack within the groove and enhances the fixing strength of the battery pack.

[0011] In one possible embodiment, the portion of the groove where the opening width narrows is used to abut against the limit block in the height direction. The guide rail can provide height constraints for the battery pack, that is, limit the displacement of the battery pack along the width direction.

[0012] In one possible embodiment, the energy storage cabinet includes a fixing plate located at one end of the guide rail near the cabinet door. The fixing plate is fixedly connected to the side wall of the battery pack facing the cabinet door and the guide rail, respectively. The battery pack is fixed to the guide rail to improve its stability.

[0013] In one possible embodiment, each guide rail includes a baffle, which is arranged parallel to the rear wall of the battery pack, is located at the other end of the guide rail away from the cabinet door, and is provided with a positioning hole. A positioning pin is provided on the side wall of the battery pack facing the baffle, and the positioning pin passes through the positioning hole. The orthographic projection of the positioning hole in the Y direction covers the orthographic projection of the positioning pin in the Y direction, the aperture of the positioning hole is greater than or equal to the diameter of the positioning pin, and the axis of the positioning hole is parallel to the Y direction. The positioning hole provides a circumferential restraint force for the positioning pin on the rear wall of the battery pack, further limits the vibration of the battery pack during transportation, and enhances the fastening force between the battery pack and the guide rail.

[0014] In one possible embodiment, the guide rail includes a base plate, a first top plate, and a stopper plate. The first top plate and the bottom plate are arranged parallel to each other in height. In each guide rail, the first top plate and the stopper plate are located higher than the base plate in height. The first top plate is connected to the stopper plate, the stopper plate is inclined toward the base plate, and the maximum distance between the stopper plate and the base plate is equal to the distance between the first top plate and the base plate. A stopper block is located between the stopper plate and the first top plate. The stopper block includes a bottom surface and a stopper surface. The bottom surface is parallel to the base plate. In height, the stopper surface of the stopper block is located higher than the bottom surface, and the stopper surface and the stopper plate are arranged parallel to each other. The minimum distance between the stopper plate and the base plate is greater than or equal to the minimum distance between the stopper surface and the base plate. The stopper plate is inclined toward the base plate. In other words, the angle between the stopper plate and the base plate is acute, forming a wedge-shaped accommodation space between the stopper plate and the base plate. Accordingly, the stopper surface and the stopper plate are arranged parallel to each other, and the stopper block is also a wedge-shaped stopper block. After the battery pack slides in through the limit block of the battery pack, the limit block and the groove cooperate with each other better. The wedge-shaped limit block is located in the wedge-shaped limit space of the groove. The limit surface is subject to a constraint force from the limit plate, which provides the limit surface with a component force in the opposite direction along the width direction and a component force in the opposite direction along the height direction, thereby limiting the vibration of the battery pack along the width direction and the height direction, and improving the stability of the battery pack.

[0015] In a possible implementation, a compression member is provided between the limiting plate and the limiting surface, and there is no gap between the limiting plate and the limiting surface. The compression member enables the limiting surface to better and more evenly receive the restraining force of the limiting plate.

[0016] In one possible embodiment, the stopper includes a first top surface, the first top surface is disposed opposite the first top plate, the first top surface is connected to the stopper surface, the distance between the first top surface and the bottom surface is equal to the maximum distance between the stopper surface and the bottom surface, the first top surface is located between the first top plate and the bottom plate, and the first top surface and the bottom surface are disposed opposite each other. After the battery pack is installed, the stopper is locked in the groove, thereby enhancing the fastening force of the battery pack.

[0017] In one possible embodiment, the guide rail includes a second top plate, the second top plate is connected to the limit plate, the second top plate is arranged parallel to the bottom plate, the distance between the second top plate and the bottom plate is smaller than the distance between the first top plate and the bottom plate, and the orthographic projection of the limit plate in the height direction is located between the orthographic projection of the first top plate in the height direction and the orthographic projection of the second top plate in the height direction.

[0018] In a possible embodiment, the limit block includes a second top surface, the second top surface is located between the second top plate and the bottom plate, the second top surface is connected to the limit surface, the second top surface is arranged parallel to the bottom surface, the distance between the second top surface and the bottom surface is smaller than the distance between the third limit surface and the bottom surface, and the orthographic projection of the limit plate in the height direction covers the orthographic projection of the limit surface in the height direction.

[0019] In one possible embodiment, the guide rail includes two limit plates, arranged sequentially along the width of the guide rail. The second top plate is connected between the two limit plates, and the minimum distance between one limit plate and the bottom plate is equal to the maximum distance between the other limit plate and the bottom plate. In other words, the opening height of the guide rail's groove gradually decreases along the width of the guide rail. Multiple wedge-shaped accommodation spaces are formed in the guide rail's groove, creating multiple limit points to securely lock the battery pack within the energy storage cabinet. This makes installation of the battery pack more convenient, maintains a secure position after installation, and enhances the stability of the energy storage cabinet.

[0020] In one possible embodiment, another limiting plate is provided at the end of the guide rail away from the cabinet door. In other words, another limiting plate is provided at the tail end of the guide rail to limit the tail end of the battery pack.

[0021] In one possible embodiment, the guide rail includes side panels extending in the width direction, perpendicular to and connected to the base plate and the stop plate, and having a plurality of through holes disposed therein, spaced apart along the width direction. The provision of the through holes can reduce the overall weight of the guide rail without compromising its overall strength.

[0022] In one possible embodiment, a pulley is provided on the bottom wall of the battery pack. The pulley can reduce the friction between the bottom wall of the battery pack and the bottom plate, reduce the wear rate between the battery pack and the guide rail, and improve installation efficiency. The bottom plate is provided with a limiting groove, which is recessed toward the side of the bottom plate away from the bottom wall of the battery pack. The limiting groove is used to accommodate the pulley, and the depth of the limiting groove is greater than or equal to the height of the pulley protruding from the bottom wall of the battery pack. The limiting groove can provide a accommodating space for the pulley, and the bottom wall of the battery pack and the bottom plate of the guide rail are in contact. This avoids the presence of the pulley causing a gap between the bottom wall of the battery pack and the bottom plate of the groove, which causes the battery pack to tilt.

[0023] In one possible embodiment, the retaining groove includes a bottom wall and two side walls, with the bottom wall connected between the two side walls. One of the side walls forms an obtuse angle with the bottom wall, and the other side wall is closer to the baffle than the other side wall. When the battery pack is installed into the energy storage cabinet, the pulley rolls over the inclined side walls to the bottom wall, allowing the pulley to enter the retaining groove. This allows the battery pack to move more smoothly, preventing damage to the battery pack and the guide rails. When the battery pack is removed from the energy storage cabinet, the pulley rolls over the inclined side walls to the bottom plate, allowing the pulley to exit the retaining groove, making it easier to remove the battery pack.

[0024] In a possible embodiment, the pulley is provided on the edge of the bottom wall of the battery pack near the rear wall of the battery pack. Correspondingly, the limiting groove is also provided on the bottom plate of the end of the guide rail away from the cabinet door.

[0025] In one possible embodiment, the cabinet includes multiple columns spaced apart along its length. Each column includes multiple columns, and the columns extend in height. Multiple battery packs are stacked between two adjacent columns. Each of the two adjacent columns is equipped with multiple guide rails, which are mirror-symmetrical along their length. The guide rails are used to secure the multiple battery packs, and the side panels are fixedly connected to the multiple columns. The columns provide support for the guide rails perpendicular to the horizontal plane, thereby supporting the battery packs on the horizontal plane and improving the mechanical strength of the energy storage cabinet.

[0026] In a second aspect, the present application also provides an energy storage system, which includes an energy storage cabinet and a power converter according to the first aspect above, wherein the power converter is used to convert the AC power outputted by the external AC power source into DC power and output it to the energy storage cabinet, and / or the power converter is used to convert the DC power outputted by the energy storage cabinet into AC power and output it to the load or the grid.

[0027] On the third aspect, the present application also provides a battery pack, which includes a shell and multiple batteries. The shell is used to accommodate multiple batteries. The outer wall of the shell is provided with a limit block. The limit block includes a bottom surface and a limit surface. The position of the limit surface in the battery pack is higher than the position of the bottom surface in the height direction of the battery pack, and the limit surface is inclined toward the bottom surface.

[0028] In a possible embodiment, the limit block includes a first top surface, the first top surface and the bottom surface are arranged parallel to each other in the height direction, the first top surface is connected to the limit surface, and the distance between the first top surface and the bottom surface is equal to the maximum distance between the first top surface, the limit surface and the bottom surface.

[0029] In a possible embodiment, the limiting block includes a second top surface, the second top surface is connected to the limiting surface, the second top surface is arranged parallel to the bottom surface, and the distance between the second top surface and the bottom surface is smaller than the distance between the third limiting surface and the bottom surface.

[0030] Fourthly, the present application also provides a battery bracket, which includes two guide rails that are mirror-symmetrical along a first direction, each of the two guide rails extends along a second direction, each of the two guide rails includes a top plate, a limit plate and a bottom plate, the top plate and the bottom plate are arranged in parallel along a third direction, the position of the limit plate and the top plate in the energy storage cabinet is higher than the position of the bottom plate in the third direction, the limit plate is connected to the top plate, the limit plate is inclined toward the bottom plate, the maximum distance between the limit plate and the bottom plate is equal to the distance between the bottom plate and the top plate, and the minimum distance between the limit plate and the bottom plate is greater than 0, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0031] The beneficial effects of the second to fourth aspects can refer to the discussion of the beneficial effects of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a diagram of an application scenario of the energy storage cabinet provided in this application;

[0033] FIG2 is a schematic structural diagram of an energy storage cabinet provided in this application;

[0034] FIG3 is a schematic diagram of the assembly of the battery pack and the guide rail in the energy storage cabinet provided by the present application;

[0035] FIG4 is a schematic structural diagram of a guide rail in an energy storage cabinet provided by the present application;

[0036] FIG5 is a schematic structural diagram of a battery pack provided in this application;

[0037] FIG6 is another structural schematic diagram of the battery pack provided in this application;

[0038] FIG7 is another structural schematic diagram of the guide rail of the energy storage cabinet provided in this application;

[0039] FIG8 is a front view of the guide rail of the energy storage cabinet provided in this application;

[0040] FIG9 is a side view of the battery pack provided in this application;

[0041] FIG10 is a cross-sectional view of the guide rail and the battery pack when the battery pack is installed at position B in FIG4 ;

[0042] FIG11 is a cross-sectional view of the guide rail and the battery pack when the battery pack is installed at position C in FIG4 ;

[0043] FIG12 is a schematic diagram of the assembly of the fixing plate and the guide rail when the battery pack is installed at position A in FIG4 ;

[0044] FIG13 is a schematic structural diagram of a fixing plate in an energy storage cabinet provided in this application.

[0045] Reference numerals: 100 - energy storage cabinet; 300 - DC / DC converter; 400 - inverter; 500 - grid; 600 - load; 700 - photovoltaic panel; 110 - cabinet; 140 - guide rail; 150 - column; 141 - bottom plate; 142 - limit plate; 1421 - compression member; 143 - first top plate; 144 - second top plate; 145 - fixing plate; 1451 - first bending portion; 14511 - screw hole; 1452 - second bending portion; 1 453-screw; 146-baffle; 1461-positioning hole; 147-limiting groove; 1471-bottom wall; 1472-side wall; 148-side plate; 1481-through hole; 141-groove; 200-battery pack; 210-housing; 220-limiting block; 221-bottom surface; 222-limiting surface; 223-first top surface; 224-second top surface; 225-front wall; 230-pulley; 226-rear wall; 227-locating pin. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all explained with reference to the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings in the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0047] The following description sets forth specific details to facilitate understanding of the present application. However, the embodiments of the present application can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotations of the embodiments of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0048] The following embodiments of the present application provide an energy storage cabinet, which can be used in energy storage application scenarios of new energy power generation, such as photovoltaic power generation.

[0049] For example, Figure 1 illustrates a schematic diagram of the overall structure of a photovoltaic system. As shown in Figure 1 , the photovoltaic system includes photovoltaic panels 700, a DC / DC converter 300, an energy storage cabinet 100, and a DC / AC converter 400. The photovoltaic panels 700 are used to convert solar energy into DC power. The DC / DC converter 300 is used to convert the DC power generated by the photovoltaic panels 700 into adjustable DC power, dynamically controlling the DC power generated by the photovoltaic panels 200 and balancing the output power of each photovoltaic panel 700. The DC power is then output to the energy storage cabinet 100 for storage. The DC power output by the energy storage cabinet 300 is converted to AC power by the DC / AC converter 400 and output to the power grid 500. The AC power output by the DC / AC converter can also be used to power a load 600. Load 600 can be electrical equipment in an industrial park.

[0050] To meet existing large-capacity energy storage needs, the energy storage cabinet 100 includes multiple battery packs. During the installation of the battery pack, after the battery pack is installed from the cabinet door to the battery bracket inside the energy storage cabinet, a fixing measure is generally taken on the side of the battery pack facing the cabinet door. The tail and middle sections of the battery pack are not restrained. During transportation, the battery pack is prone to vibration, which can easily cause damage to the battery pack and the energy storage cabinet. Based on this, the embodiment of the present application provides an energy storage cabinet to provide restraint on the battery pack, limit vibration of the battery pack during transportation, and avoid damage to the battery pack and the energy storage cabinet during transportation or daily use.

[0051] The present application provides an energy storage cabinet 100. The structure of the energy storage cabinet 100 can be seen in the schematic structural diagram of the energy storage cabinet 100 shown in FIG2 , the schematic assembly diagram of the battery pack 200 and the guide rail 140 shown in FIG3 , and the schematic structural diagram of the guide rail 140 shown in FIG4 . In the following figures, the coordinate directions indicated by the X-axis represent the length direction of the energy storage cabinet 100, the Y-axis represents the width direction of the energy storage cabinet 100, and the Z-axis represents the height direction of the energy storage cabinet 100.

[0052] Referring to Figures 2 to 4 , the energy storage cabinet 100 includes a cabinet body 110 , which is provided with multiple battery compartments 120 arranged along the X-direction. Each battery compartment 120 contains a row of battery clusters, each of which includes multiple battery packs 200. The battery packs 200 can be stacked. It should be noted that the energy storage cabinet 100 provided in the embodiments of the present application may also include a single battery compartment 120 , that is, the energy storage cabinet 100 may include only a single row of battery clusters. The size and dimensions of the energy storage cabinet 100 can be arbitrarily selected based on actual needs. Each battery compartment 120 has two opposing side walls arranged along the X-direction, each pair of guide rails 140 comprising two guide rails 140. The cabinet body 110 is used to accommodate the guide rails 140 and the battery packs 200. The cabinet body 110 has a cabinet door (not shown) located at the opening of the energy storage cabinet 100. The two guide rails 140 extend along the Y-direction and are mirror-symmetrical in the X-direction. Each guide rail 140 is provided with a groove 141 extending along the Y direction. The openings of the grooves 141 face each other and face into the cabinet 110. The opening width of the groove 141 of the guide rail 140 near one end of the cabinet door along the Z direction is greater than the opening width of the groove 141 at the other end of the guide rail 140. Each pair of mirror-symmetrical guide rails 140 can carry one battery pack 200.

[0053] Accordingly, the structure of the battery pack 200 provided in the embodiment of the present application can refer to the structural schematic diagram of the battery pack 200 shown in Figure 5 or Figure 6. The battery pack 200 includes a shell 210 and a plurality of batteries, and the shell 210 is used to accommodate the plurality of batteries. The two side wall surfaces of the battery pack 200 arranged opposite to each other along the X direction are provided with protruding limit blocks 220. When the battery pack 200 is installed in the energy storage cabinet 100, the limit blocks 220 of the battery pack 200 can be stuck in the groove 141, and the limit blocks 220 slide into the groove 141 along the guide rail 140. Since the opening width of the groove 141 in the Y direction is different, the portion of the groove 141 where the opening width becomes narrower can resist the limit block 220 in the Y direction. When the limit block 220 of the battery pack 200 slides to the narrowed opening width of the groove 141, the limit block 220 can be better engaged, thereby providing Y-direction constraints for the battery pack 200, i.e., limiting the displacement of the battery pack 200 along the Y-direction, thereby solving the problem of fixing the battery pack 200 during transportation, and preventing the battery pack 200 and the energy storage cabinet 100 from being damaged due to vibration during transportation.

[0054] In one embodiment, the orthographic projection of the groove 141 along its length is a stepped shape, and the orthographic projection of the stopper 220 along its length is also a stepped shape. The shapes of the stopper 220 and the groove 141 complement each other. The stepped shapes of both the stopper 220 and the groove 141 facilitate the locking of the stopper 220 of the battery pack 200 within the groove 141, thereby enhancing the securing strength of the battery pack 200.

[0055] In one embodiment, the portion of the groove 141 where the opening width becomes narrower is used to support the limit block 220 in the Z direction. In a specific implementation, the structure of the guide rail 140 can refer to the structural schematic diagram of the guide rail 140 shown in Figure 7 and the front view of the guide rail 140 shown in Figure 8. The guide rail 140 includes a bottom plate 141, a first top plate 143, and a limit plate 142. The bottom plate 141 extends along the Y direction, and the length of the bottom plate 141 in the Y direction is greater than the length of the first top plate 143 and the limit plate 142 in the Y direction. The first top plate 143 and the bottom plate 141 are arranged parallel to each other along the Z direction. In the Z direction, the first top plate 143 and the limiting plate 142 of each guide rail 140 are positioned higher than the bottom plate 141. The first top plate 143 is connected to the limiting plate 142, which is inclined toward the bottom plate 141. The maximum distance L3 between the limiting plate 142 and the bottom plate 141 is equal to the distance L1 between the first top plate 143 and the bottom plate 141. In other words, a wedge-shaped accommodation space is formed between the limiting plate 142 and the bottom plate 141. It should be noted that the limiting plate 142 can be either flat or curved.

[0056] FIG9 is a front view of the limit block 220 in the battery pack 200 shown in FIG6 . The limit block 220 includes a bottom surface 221 and a limit surface 222. The bottom surface 221 is parallel to the bottom plate 141. In the Z direction, the position of the limit surface 222 in the limit block 220 is higher than the position of the bottom surface 221. The limit surface 222 and the limit plate 142 are arranged in parallel. The minimum distance L2 between the limit plate 142 and the bottom plate 141 is greater than or equal to the minimum distance L9 between the limit surface 222 and the bottom plate 141. The limit block 220 includes a first top surface 223. The first top surface 223 is arranged opposite to the first top plate 143. The first top surface 223 is connected to the limit surface 222. The distance L7 between the first top surface 223 and the bottom surface 221 is equal to the maximum distance L8 between the limit surface 222 and the bottom surface 221. 8 and 9 , the shape of the groove 141 is identical to the shape of the stopper 220 of the battery pack 200. This allows the stopper 220 to better fit with the groove 141 after the battery pack 200 slides through the stopper 220 of the battery pack 200. It should be noted that the shapes of the stopper plate 142 and the stopper surface 222 must be identical. When the stopper plate 142 is flat, the stopper surface 222 is also flat; when the stopper plate 142 is curved, the stopper surface 222 is also curved.

[0057] In one embodiment, the guide rail 140 includes a bottom plate 141, a first top plate 143, and a limiting plate 142. The bottom plate 141 extends along the Y direction, and the length of the bottom plate 141 in the Y direction is greater than the length of the first top plate 143 and the limiting plate 142 in the Y direction. The first top plate 143 and the bottom plate 141 are not arranged parallel to each other along the Z direction. In the Z direction, the position of the first top plate 143 and the limiting plate 142 in each guide rail 140 is higher than the position of the bottom plate 141, the first top plate 143 is connected to the limiting plate 142, the limiting plate 142 is inclined toward the bottom plate 141, and the maximum distance between the limiting plate 142 and the bottom plate 141 is equal to the minimum distance between the first top plate 143 and the bottom plate 141. Correspondingly, the first top surface 223 of the limit block 220 of the battery pack 200 is not parallel to the bottom surface 221, the first top surface 223 of the limit block 220 of the battery pack 200 is parallel to the first top plate 143, and the bottom surface 221 of the limit block 220 of the battery pack 200 is parallel to and fits with the bottom plate 141 of the guide rail 140.

[0058] Figure 10 is a cross-sectional view of the guide rail 140 and battery pack 200 when the battery pack 200 is installed at position B in Figure 4 . When the battery pack 200 is installed in the guide rail 140, the limit block 220 is located between the limit plate 142 and the first top plate 143. The limit surface 222 is subject to a restraining force F exerted by the limit plate 142. This force F is decomposed into a force component F1 in the opposite direction along the Y direction and a force component F2 in the opposite direction along the Z direction. The restraining force F exerted on the limit surface 222 limits vibration of the battery pack 200 in both the Y and Z directions.

[0059] In one embodiment, referring to Figures 8 and 10, the angle ∠1 between the limit plate 142 of the guide rail 140 and the horizontal plane in the Y direction is an acute angle, so that a wedge-shaped accommodation space is formed between the limit plate 142 and the bottom plate 141. If ∠1 is too large, F2 will be too small, and the vibration of the battery pack 200 cannot be well constrained in the Z direction. If ∠2 is too small, F1 will be too small, and the vibration of the battery pack 200 cannot be well constrained in the Y direction. Therefore, ∠1 needs to be controlled within an appropriate range, for example, it can be 15 to 60 degrees.

[0060] In one embodiment, after the battery pack 200 slides into place, in order to allow the limiting surface 222 to better and more evenly receive the restraining force of the limiting plate 142, a compression member 1421 is provided between the limiting plate 142 and the limiting surface 222. The position of the compression member 1421 can be shown with reference to FIG10. After the battery pack 200 slides into place, due to the provision of the compression member 1421, the limiting plate 142 and one side of the compression member 1421 are in close contact, and the limiting surface 222 and the other side of the compression member 1421 are in close contact, so that there is no gap between the limiting plate 142 and the limiting surface 222, thereby ensuring that the limiting block 220 of the battery pack 200 is firmly fixed in the groove 141.

[0061] In one embodiment, the guide rail 140 includes a second top plate 144, which is connected to the limiting plate 142. The second top plate 144 is arranged parallel to the bottom plate 141. The distance between the second top plate 144 and the bottom plate 141 is smaller than the distance between the first top plate 143 and the bottom plate 141. The orthographic projection of the limiting plate 142 in the Z direction is located between the orthographic projection of the first top plate 143 in the Z direction and the orthographic projection of the second top plate 144 in the Z direction. The limiting plate 142 is arranged at an angle, with the higher end of the limiting plate 142 connected to the first top plate 143 and the lower end of the limiting plate 142 connected to the second top plate 144.

[0062] Correspondingly, the limiting block 220 of the battery pack 200 includes a second top surface 224, which is located between the second top plate 144 and the bottom plate 141, and the second top surface 224 is connected to the limiting surface 222. The second top surface 224 is arranged parallel to the bottom surface 221, and the distance between the second top surface 224 and the bottom surface 221 is smaller than the distance between the third limiting surface 222 and the bottom surface 221. The orthographic projection of the limiting plate 142 in the Z direction covers the orthographic projection of the limiting surface 222 in the Z direction.

[0063] In one embodiment, the guide rail 140 includes a second top plate 144, which is connected to the limiting plate 142. The second top plate 144 is not parallel to the bottom plate 141. The distance between the second top plate 144 and the bottom plate 141 is less than the distance between the first top plate 143 and the bottom plate 141. The orthographic projection of the limiting plate 142 in the Z direction is located between the orthographic projection of the first top plate 143 in the Z direction and the orthographic projection of the second top plate 144 in the Z direction. The limiting plate 142 is arranged at an angle, with the higher end of the limiting plate 142 connected to the first top plate 143 and the lower end of the limiting plate 142 connected to the second top plate 144. Correspondingly, the second top surface 224 of the limit block 220 of the battery pack 200 is not parallel to the bottom surface 221, the second top surface 224 of the limit block 220 of the battery pack 200 is parallel to the second top plate 144, and the bottom surface 221 of the limit block 220 of the battery pack 200 is parallel to and fits with the bottom plate 141 of the guide rail 140.

[0064] Furthermore, in order to enhance the tightness of the connection between the limiting block 220 and the guide rail 140, the guide rail 140 may include two limiting plates 142, which are arranged in sequence along the Y direction. The structure of the guide rail 140 can be seen in Figures 7 and 8. The second top plate 144 is connected between the two limiting plates 142, wherein the minimum distance L2 between one limiting plate 142 and the bottom plate 141 is equal to the maximum distance L6 between the other limiting plate 142 and the bottom plate 141, and the minimum distance L4 between the other limiting plate 142 and the bottom plate 141 is greater than 0. The other limiting plate 142 is provided at the end of the guide rail 140 away from the cabinet door. The angle ∠2 between the limiting plate 142 at the rear of the guide rail 140 and the horizontal plane in which the Y direction is located is an acute angle, so that a wedge-shaped accommodation space is formed between the limiting plate 142 at the rear of the guide rail 140 and the bottom plate 141. The sizes of ∠1 and ∠2 can be equal, which can simplify the manufacturing process of the guide rail 140 and the limiting block 220 of the battery pack 200.

[0065] Accordingly, a limit block 220 can be provided at the rear end of the side wall of the battery pack 200. The limit block 220 includes a first top surface 223 and a limit surface 222. The limit block 220 of the battery pack 200 can be shown in FIG11 , which is a cross-sectional view of the guide rail 140 and the battery pack 200 when the battery pack 200 is installed at position C in FIG4 . When the battery pack 200 is installed, the limit plate 142 at the rear end of the guide rail 140, the limit block 220 at the rear end of the side wall of the battery pack 200, and the limit plate 142 at the rear end of the guide rail 140 abut against each other. The limit plate 142 provides a force component F3 in the opposite direction of the Y direction and a force component F4 in the opposite direction of the Z direction to the limit surface 222, thereby limiting the vibration of the battery pack 200 in the Y and Z directions. In other words, a limit plate 142 is provided at the middle and rear end of the guide rail 140, respectively. The guide rail 140 and the limit blocks 220 of the battery pack 200 form matching structures at the middle and tail of the guide rail 140, thereby forming multiple limit positions, thereby locking the battery pack 200 inside the energy storage cabinet 100. The installation of the battery pack 200 is relatively convenient, and the position of the battery pack 200 after installation is relatively firm, and the stability of the energy storage cabinet 100 is relatively high.

[0066] It should be understood that in order to further enhance the firmness of the battery pack 200 in the energy storage cabinet 100, a plurality of limiting plates 142 can be provided in the guide rail 140. Accordingly, a plurality of limiting blocks 220 are provided in the battery pack 200 to facilitate the formation of multiple limiting structures between the guide rail 140 and the battery pack 200.

[0067] Referring to Figures 8 and 9 , to improve the installation efficiency of the battery pack 200, a pulley 230 can be installed on the bottom wall of the battery pack 200. The pulley 230 can reduce the friction between the bottom wall of the battery pack 200 and the bottom plate 141, thereby reducing the wear rate between the battery pack 200 and the guide rail 140, and improving installation efficiency. Accordingly, the bottom plate 141 is provided with a limiting groove 147. The limiting groove 147 is recessed toward the side of the bottom plate 141 facing away from the bottom wall of the battery pack 200. The limiting groove 147 can accommodate the pulley 230. The depth L5 of the limiting groove is greater than or equal to the height 2r of the pulley 230 protruding from the bottom wall of the battery pack 200. The limiting groove 147 provides a space for accommodating the pulley 230, so that the bottom wall of the battery pack 200 and the bottom plate 141 of the guide rail 140 are in contact with each other. This prevents the presence of the pulley 230 from causing a gap between the bottom wall of the battery pack 200 and the bottom plate 141 of the groove 141 , thereby preventing the battery pack 200 from tilting.

[0068] Referring to Figure 8 , the retaining groove 147 includes a bottom wall and two side walls. The bottom wall is connected between the two side walls. One side wall 1472 forms an obtuse angle with the bottom wall 1471, and the other side wall is closer to the baffle 146 than the other side wall 1472. When the battery pack 200 is installed into the energy storage cabinet 100, the pulley 230 rolls over the inclined side wall 1472 to the bottom wall 1471, allowing the pulley 230 to enter the retaining groove 147. This allows the battery pack 200 to move smoothly, preventing damage to the battery pack 200 and the guide rail 140. When the battery pack 200 is removed from the energy storage cabinet 100, the pulley 230 rolls over the inclined side wall 1472 to the bottom plate 141, allowing the pulley 230 to exit the retaining groove 147, making it easier to remove the battery pack 200.

[0069] It should be noted that the bottom wall of the battery pack 200 may be provided with multiple pulleys 230 or only one pulley 230. When only one pulley 230 is provided on the bottom wall of the battery pack 200, the pulley 230 is located on the edge of the bottom wall of the battery pack 200 near the rear wall 226 of the battery pack 200. When the battery pack 200 has multiple pulleys 230, the bottom plate 141 of the guide rail 140 has multiple corresponding limiting grooves 147, and the multiple limiting grooves 147 accommodate the multiple pulleys 230 in a one-to-one correspondence.

[0070] Continuing with FIG11 , each guide rail 140 includes a baffle 146 , which is arranged parallel to the rear wall 226 of the battery pack 200. The baffle 146 is located at the other end of the guide rail 140 away from the cabinet door, that is, at the rear end of the guide rail 140. After the battery pack 200 slides into position, the baffle 146 provides a blocking force to prevent the battery pack 200 from continuing to slide in the Y direction, potentially colliding with and damaging the rear wall 226 of the energy storage cabinet 100.

[0071] Furthermore, the baffle 146 is provided with a positioning hole 1461. That is, the rear wall 226 of the battery pack 200 is provided with a positioning pin 227, and the positioning pin 227 passes through the positioning hole 1461. The orthographic projection of the positioning hole 1461 in the Y direction covers the orthographic projection of the positioning pin 227 in the Y direction, the aperture of the positioning hole 1461 is greater than or equal to the diameter of the positioning pin 227, and the axis of the positioning hole 1461 is parallel to the Y direction. The positioning hole 1461 provides a circumferential restraint force for the positioning pin 227 of the rear wall 226 of the battery pack 200, further limiting the vibration of the battery pack 200 during transportation and enhancing the fastening force between the battery pack 200 and the guide rail 140.

[0072] After the battery pack 200 is installed in the guide rail 140, it is necessary to take fixing measures for the front wall 225 of the battery pack 200. The front wall 225 of the battery pack 200 faces the cabinet door, so the front wall 225 can be fixed from the cabinet door. The battery pack 200 can be fixed with a fixing plate 145. The fixing plate 145 is located at the end of the guide rail 140 close to the cabinet door. The fixing plate 145 is fixedly connected to the side wall of the battery pack 200 facing the cabinet door and the guide rail 140 respectively. The position and structure of the fixing plate 145 can be referred to Figures 12 and 13. Figure 12 is a schematic diagram of the assembly of the fixing plate 145 and the guide rail 140 when the battery pack 200 is installed to position A in Figure 4, and Figure 13 is a schematic diagram of the structure of the fixing plate 145. The fixing plate 145 includes a first bent portion 1451 and a second bent portion 1452. The first bent portion 1451 and the second bent portion 1452 are perpendicular to each other. The second bent portion 1452 can connect to the side wall of the energy storage cabinet 100, thereby securing the fixing plate 145 to the energy storage cabinet 100. The first bent portion 1451 is parallel to the front wall 225 of the battery pack 200. Multiple screw holes 14511 are provided on the first bent portion 1451. Multiple screw holes 14511 are also provided on the front wall 225 of the battery pack 200 at positions corresponding to the screw holes 14511 on the first bent portion 1451. Once the battery pack 200 is installed, the screws 1453 and the studs cooperate to secure the battery pack 200 to the energy storage cabinet 100.

[0073] The guide rail 140 includes a side plate 148, which extends in the width direction. The side plate 148 is perpendicular to and connected to the bottom plate 141 and the limit plate 142. In other words, the cross-sectional shape of the guide rail 140 along the Z direction can be C-shaped. The guide rail 140 as a whole has relatively superior strength and rigidity. The guide rail 140 is not easy to deform, and the support and limitation of the battery pack 200 are more stable. In specific implementation, the guide rail 140 can be formed in one piece, or the guide rail 140 can be divided into multiple sections in the Y direction and processed separately, and then assembled into shape. When the guide rail 140 is formed in one piece, the guide rail 140 can be formed by bending the sheet metal and then welding it.

[0074] The side plate 148 is provided with a plurality of through holes 1481 , which are spaced apart in sequence along the width direction. The provision of the through holes 1481 can reduce the overall weight of the guide rail 140 without affecting the overall strength of the guide rail 140 .

[0075] The cabinet 110 includes a plurality of columns 150 arranged at intervals along the length direction, each column 150 includes a plurality of columns 150, and the plurality of columns 150 extend along the Z direction. A plurality of battery packs 200 are stacked between two adjacent columns 150. The two adjacent columns 150 are respectively provided with a plurality of guide rails 140, and the guide rails 140 on the two adjacent columns 150 are mirror-symmetrical in the length direction. The plurality of guide rails 140 are used to fix the plurality of battery packs 200, and the side panels 148 are fixedly connected to the plurality of columns 150. The columns 150 can provide support for the guide rails 140 perpendicular to the horizontal plane, thereby supporting the battery packs 200 on the horizontal plane. Figure 3 illustrates that three pairs of mirror-image guide rails 140 are arranged inside the cabinet 110, which can carry three battery packs 200.

[0076] Based on the same inventive concept, embodiments of the present application also provide an energy storage system. The application scenario of the energy storage system can be seen in FIG1 . The energy storage system includes the aforementioned energy storage cabinet 100 and a power converter. The power converter is configured to convert AC power output from an external AC power source into DC power and output it to the energy storage cabinet 100, and / or the power converter is configured to convert DC power output from the energy storage cabinet 100 into AC power and output it to a load or a power grid.

[0077] Based on the same inventive concept, embodiments of the present application also provide a battery holder, the structure of which can be seen in Figures 4, 7, and 8. The battery holder includes two guide rails 140 that are mirror-symmetrical along a first direction (X direction). Each of the two guide rails 140 extends along a second direction (Y direction). Each guide rail 140 includes a top plate, a limit plate 142, and a bottom plate 141. The top plate and bottom plate 141 are arranged parallel to each other along a third direction. In the energy storage cabinet 100, the limit plates 142 and the top plate are located higher than the bottom plate 141 in the third direction (Z direction). The limit plates 142 are connected to the top plate and are inclined toward the bottom plate 141. The maximum distance L3 between the limit plates 142 and the bottom plate 141 is equal to the distance L1 between the bottom plate 141 and the top plate, and the minimum distance L2 between the limit plates 142 and the bottom plate 141 is greater than 0. The first direction, the second direction, and the third direction are mutually perpendicular.

[0078] In this application, "plurality" refers to two or more. "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0079] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

[0080] The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in this application should be covered by the protection scope of the present application.

Claims

1. An energy storage cabinet, characterized in that, The energy storage cabinet comprises a cabinet body, a battery pack, and two guide rails arranged opposite to each other along the length direction of the cabinet body, wherein the cabinet body is used to accommodate the guide rails and the battery pack, the cabinet body is provided with a cabinet door, and the two guide rails extend along the width direction of the cabinet body; Each of the two guide rails is provided with a groove extending along the width direction, and the opening directions of the grooves are opposite and face the inside of the cabinet; The opening width of the guide rail groove near one end of the cabinet door along the height direction of the cabinet body is larger than the opening width of the groove at the other end of the guide rail. The two side wall surfaces of the battery pack are provided with protruding limit blocks, and the limit blocks are stuck in the grooves. The part of the groove where the opening width becomes narrower is used to support the limit blocks in the width direction.

2. The energy storage cabinet according to claim 1, characterized in that The orthographic projection of the groove in the length direction is a step shape, and the orthographic projection of the limit block in the length direction is a step shape.

3. The energy storage cabinet according to claim 1 or 2, characterized in that The portion of the groove where the opening width becomes narrower is used to abut against the limit block in the height direction.

4. The energy storage cabinet according to any one of claims 1 to 3, characterized in that The energy storage cabinet includes a fixing plate, which is located at one end of the guide rail close to the cabinet door, and the fixing plate is fixedly connected to the side wall of the battery pack facing the cabinet door and the guide rail respectively.

5. The energy storage cabinet according to claim 3 or 4, characterized in that, Each guide rail includes a baffle, which is arranged parallel to the rear wall of the battery pack, and is located at the other end of the guide rail away from the cabinet door, and is provided with a positioning hole; A positioning pin is provided on the side wall of the battery pack facing the baffle, and the positioning pin passes through the positioning hole.

6. The energy storage cabinet according to any one of claims 1-5, characterized in that, The guide rail comprises a bottom plate, a first top plate, and a limit plate, wherein the first top plate and the bottom plate are arranged in parallel along the height direction, wherein in the height direction, the positions of the first top plate and the limit plate in each guide rail are higher than the position of the bottom plate, the first top plate is connected to the limit plate, the limit plate is inclined toward the bottom plate, and the maximum distance between the limit plate and the bottom plate is equal to the distance between the first top plate and the bottom plate; The limit block is located between the limit plate and the first top plate, the limit block comprises a bottom surface and a limit surface, the bottom surface is parallel to the bottom plate, in the height direction, the position of the limit surface in the limit block is higher than the position of the bottom surface, and the limit surface and the limit plate are arranged in parallel; The minimum distance between the limiting plate and the bottom plate is greater than or equal to the minimum distance between the limiting surface and the bottom plate.

7. The energy storage cabinet according to claim 6, wherein A compression piece is provided between the limiting plate and the limiting surface.

8. The energy storage cabinet according to claim 6 or 7, characterized in that, The limiting block includes a first top surface, the first top surface is arranged opposite to the first top plate, the first top surface is connected to the limiting surface, and the distance between the first top surface and the bottom surface is equal to the maximum distance between the limiting surface and the bottom surface.

9. The energy storage cabinet according to any one of claims 6-8, characterized in that, The guide rail includes a second top plate, the second top plate is connected to the limiting plate, the second top plate is arranged parallel to the bottom plate, the distance between the second top plate and the bottom plate is smaller than the distance between the first top plate and the bottom plate, and the orthographic projection of the limiting plate in the height direction is located between the orthographic projection of the first top plate in the height direction and the orthographic projection of the second top plate in the height direction.

10. The energy storage cabinet according to claim 9, wherein, The limiting block includes a second top surface, which is located between the second top plate and the bottom plate. The second top surface is connected to the limiting surface and is arranged parallel to the bottom surface. The distance between the second top surface and the bottom surface is less than the distance between the third limiting surface and the bottom surface. The orthographic projection of the limiting plate in the height direction covers the orthographic projection of the limiting surface in the height direction.

11. The energy storage cabinet according to any one of claims 6-10, characterized in that, The guide rail includes two limiting plates, and the two limiting plates are arranged in sequence along the width direction. The second top plate is connected between the two limiting plates. The minimum distance between one limiting plate and the bottom plate is equal to the maximum distance between the other limiting plate and the bottom plate.

12. The energy storage cabinet according to claim 11, wherein, The other limiting plate is arranged at one end of the guide rail away from the cabinet door.

13. The energy storage cabinet according to any one of claims 6-12, characterized in that, The guide rail includes side plates, and the side plates extend along the width direction. The side plates are perpendicular to and connected to the bottom plate and the limiting plates. A plurality of through holes are provided on the side plates, and the plurality of through holes are arranged in sequence along the width direction.

14. The energy storage cabinet according to any one of claims 6-13, characterized in that, A pulley is provided on the bottom wall of the battery pack, and a limiting groove is provided on the bottom plate. The limiting groove is recessed toward the side of the bottom plate away from the bottom wall of the battery pack. The limiting groove is used to accommodate the pulley, and the depth of the limiting groove is greater than or equal to the height of the pulley protruding from the bottom wall of the battery pack.

15. The energy storage cabinet according to claim 14, characterized in that, The limiting groove includes a bottom wall and two side walls. The bottom wall is connected between the two side walls. The included angle between one side wall and the bottom wall is an obtuse angle. Compared with the one side wall, the other side wall is closer to the baffle.

16. The energy storage cabinet according to claim 10 or 11, characterized in that, The pulley is arranged at the edge of the bottom wall of the battery pack close to the rear wall of the battery pack.

17. The energy storage cabinet according to claim 13, wherein The cabinet body includes multiple columns of upright posts arranged at intervals along the length direction. Each column of upright posts includes multiple upright posts, and the multiple upright posts extend along the height direction. A plurality of the battery packs are stacked between adjacent two columns of upright posts; Multiple guide rails are respectively provided on adjacent two columns of upright posts. The guide rails on adjacent two columns of upright posts are mirror-symmetrical in the length direction. The multiple guide rails are used to fix the multiple battery packs, and the side plates are fixedly connected to the multiple upright posts.

18. An energy storage system, characterized in that, The energy storage system includes the energy storage cabinet according to any one of claims 1-17 above and a power converter. The power converter is used to convert the alternating current output by an external alternating current power supply into direct current and output it to the energy storage cabinet, and / or, the power converter is used to convert the direct current output by the energy storage cabinet into alternating current and output it to a load or the power grid.

19. A battery pack, characterized in that, The battery pack includes a housing and multiple batteries. The housing is used to accommodate the multiple batteries. A limiting block is provided on the outer wall of the housing. The limiting block includes a bottom surface and a limiting surface. The position of the limiting surface in the battery pack is higher than the position of the bottom surface in the height direction of the battery pack, and the limiting surface is inclined toward the bottom surface.

20. The battery pack according to claim 19, wherein, The limiting block includes a first top surface, which is arranged parallel to the bottom surface along the height direction. The first top surface is connected to the limiting surface, and the distance between the first top surface and the bottom surface is equal to the maximum distance between the first top surface, the limiting surface and the bottom surface.

21. The battery pack according to claim 20, wherein, The limiting block includes a second top surface, the second top surface is connected to the limiting surface, the second top surface is arranged parallel to the bottom surface, and the distance between the second top surface and the bottom surface is less than the distance between the third limiting surface and the bottom surface.

22. A battery bracket, characterized in that, The battery bracket includes two guide rails that are mirror-symmetrical along the first direction, each of the two guide rails extends along the second direction, each of the two guide rails includes a top plate, a limiting plate, and a bottom plate, the top plate and the bottom plate are arranged parallel to each other along the third direction, the positions of the limiting plate and the top plate in the energy storage cabinet are higher than the position of the bottom plate in the third direction, the limiting plate is connected to the top plate, the limiting plate is inclined towards the bottom plate, the maximum distance between the limiting plate and the bottom plate is equal to the distance between the bottom plate and the top plate, the minimum distance between the limiting plate and the bottom plate is greater than 0, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

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