Energy storage cabinet and energy storage system

Abstract

The utility model provides an energy storage cabinet, an energy storage system, a battery pack and a battery bracket. The energy storage cabinet comprises a cabinet body, a battery pack and two guide rails oppositely arranged in the length direction of the cabinet body, the cabinet body is used for containing the guide rails and the battery pack, the cabinet body is provided with a cabinet door, and the two guide rails extend in the width direction of the cabinet body. Each of the two guide rails is provided with a groove extending in the width direction, and the opening directions of the grooves are opposite and face the interior of the cabinet body. The opening width of the guide rail groove close to one end of the cabinet door in the height direction of the cabinet body is larger than the opening width of the groove in the other end of the guide rail, protruding limiting blocks are arranged on the surfaces of the two side walls of the battery pack, the limiting blocks are clamped in the grooves, and the portions, where the opening width is narrowed, in the grooves are used for abutting against the limiting blocks in the width direction. The guide rails can provide constraint in the width direction for the battery pack, the displacement of the battery pack in the horizontal direction is limited, and damage to the battery pack and the energy storage cabinet due to vibration in the transportation process of the battery pack can be avoided.

Description

Technical Field

[0001] This application relates to the field of energy, and particularly to an energy storage cabinet and an energy storage system. Background Art

[0002] Products such as energy storage cabinets and energy storage boxes are gradually evolving towards higher energy density. Therefore, the number of battery cells included in a single energy storage battery pack is gradually increasing, the size and weight of a single energy storage battery pack are gradually becoming larger, the length of the energy storage battery pack usually exceeds 2 m, and the weight usually exceeds 700 kg. Due to the large size and weight of the battery pack, during the transportation with the board, the vibration and impact forces generated by the battery pack on the cabinet body of the energy storage cabinet or the battery pack mounting rack are relatively large.

[0003] For the guide rails on the cabinet body of the energy storage cabinet or the battery pack mounting rack, the battery pack carried is mostly fixed from the front, and there is a lack of restraint on the tail and the middle section of the battery pack. Facing the battery pack with a large weight, the guide rails cannot provide strong enough fixation, thus unable to solve the problem that the vibration of the battery pack during transportation will cause damage to the battery pack and the energy storage cabinet. Summary of the Utility Model

[0004] This application provides an energy storage cabinet and an energy storage system. By providing guide rails with accommodation spaces of different shapes in the energy storage cabinet, a binding force in the width direction is provided for the battery pack, avoiding damage to the battery pack and the energy storage cabinet caused by the vibration of the battery pack.

[0005] In the first aspect, this application provides an energy storage cabinet. The energy storage cabinet includes a cabinet body, a battery pack, and two guide rails oppositely arranged 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. 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 towards the inside of the cabinet body. The opening width of the guide rail groove at one end close to 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. Convex limiting blocks are provided on the surfaces of both side walls of the battery pack, and the limiting blocks are stuck in the grooves. The part of the groove where the opening width becomes narrower is used to resist the limiting blocks in the width direction.

[0006] In the technical solution provided by this application, after the battery pack is pushed into the energy storage cabinet, the limiting blocks on the side walls of the battery pack can be stuck in the grooves of the guide rails of the energy storage cabinet. The part of the groove where the opening width becomes narrower resists the limiting blocks in the width direction. The guide rails can provide a binding force in the width direction for the battery pack, that is, restrict the displacement of the battery pack along the width direction, can solve the fixation problem of the battery pack during transportation, and can avoid damage to the battery pack and the energy storage cabinet caused by vibration during transportation of the battery pack.

[0007] In a possible implementation, the positive projection of the groove in the length direction is trapezoidal, and the positive projection of the limiting block in the length direction is trapezoidal. The shapes of the limiting block and the groove match, which is conducive to clamping the limiting block of the battery pack in the groove and enhancing the fixing strength of the battery pack.

[0008] In a possible implementation, the part of the groove where the opening width narrows is used to abut against the limiting block in the height direction. The guide rail can provide a constraint for the battery pack in the height direction, that is, limit the displacement of the battery pack along the width direction.

[0009] In a possible implementation, the energy storage cabinet includes a fixing piece, which is located at one end of the guide rail close to the cabinet door. The fixing piece 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 in the guide rail to improve the stability of the battery pack.

[0010] In a possible implementation, each guide rail includes a baffle, the baffle is arranged parallel to the rear wall of the battery pack, the baffle is located at the other end of the guide rail away from the cabinet door, and the baffle 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 positive projection of the positioning hole in the Y direction covers the positive 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 binding force for the positioning pin on the rear wall of the battery pack, further restricting the vibration of the battery pack during transportation and enhancing the fastening force between the battery pack and the guide rail.

[0011] In a possible implementation, the guide rail includes a bottom plate, a first top plate and a limiting plate. The first top plate and the bottom plate are arranged parallel in the height direction. In the height direction, the positions of the first top plate and the limiting plate in each guide rail are higher than the position of the bottom plate. The first top plate is connected to the limiting plate, and 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 first top plate and the bottom plate. The limiting block is located between the limiting plate and the first top plate. The limiting block includes a bottom surface and a limiting surface. The bottom surface is parallel to the bottom plate. In the height direction, the position of the limiting surface in the limiting block is higher than the position of the bottom surface. The limiting surface is arranged parallel to the limiting plate. 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. The limiting plate is inclined towards the bottom plate. In other words, the included angle between the limiting plate and the bottom plate is an acute angle, and a wedge-shaped accommodation space is formed between the limiting plate and the bottom plate. Correspondingly, the limiting surface is arranged parallel to the limiting plate, and the limiting block is also a wedge-shaped limiting block. After the battery pack slides in through the limiting block of the battery pack, the limiting block and the groove cooperate better with each other. The wedge-shaped limiting block is located in the wedge-shaped limiting space of the groove. The limiting surface receives a binding force from the limiting plate, providing a component force in the opposite direction along the width direction and a component force in the opposite direction along the height direction for the limiting surface, thereby restricting the vibration of the battery pack along the width direction and the height direction and improving the stability of the battery pack.

[0012] 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 binding force of the limiting plate.

[0013] In a possible implementation, the limiting block includes a first top surface, which is arranged opposite to the first top plate. The first top surface is connected to the limiting surface. 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. 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 arranged opposite to each other. After the battery pack is installed in place, the limiting block is stuck in the groove, improving the fastening force of the battery pack.

[0014] In a possible implementation, the guide rail includes a second top plate, which 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 less than the distance between the first top plate and the bottom plate. The positive projection of the limiting plate in the height direction is located between the positive projection of the first top plate in the height direction and the positive projection of the second top plate in the height direction.

[0015] In a possible implementation, 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. The second top surface 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 limiting surface and the bottom surface. The positive projection of the limiting plate in the height direction covers the positive projection of the limiting surface in the height direction.

[0016] In a possible implementation, the guide rail includes two limiting plates, which are arranged in sequence along the width direction. The second top plate is connected between the two limiting plates. The minimum distance between one of the limiting plates and the bottom plate is equal to the maximum distance between the other limiting plate and the bottom plate. That is to say, the opening height of the groove of the guide rail gradually decreases along the width direction. A plurality of wedge-shaped accommodation spaces are formed in the groove of the guide rail, achieving multiple positions of limitation, realizing locking the battery pack inside the energy storage cabinet. The installation of the battery pack is relatively convenient, and the position of the battery pack after installation is relatively firm, and the stability of the energy storage cabinet is relatively high.

[0017] In a possible implementation, the other limiting plate is arranged at one end of the guide rail away from the cabinet door. In other words, the other limiting plate is arranged at the tail of the guide rail. The tail of the battery pack is limited.

[0018] In a possible implementation, the guide rail includes side plates, which 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 at intervals along the width direction. The arrangement of the through holes can reduce the overall weight of the guide rail on the basis of not affecting the overall strength of the guide rail.

[0019] In a possible implementation, the bottom wall of the battery pack is provided with pulleys. The pulleys can reduce the friction between the bottom wall of the battery pack and the bottom plate, lower the wear rate between the battery pack and the guide rail, and improve the 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 pulleys, and the depth of the limiting groove is greater than or equal to the height of the pulleys protruding from the bottom wall of the battery pack. The limiting groove can provide a receiving space for the pulleys, and the bottom wall of the battery pack fits with the bottom plate of the guide rail. This can prevent a gap from existing between the bottom wall of the battery pack and the bottom plate of the groove due to the presence of the pulleys, resulting in the inclination of the battery pack.

[0020] In a possible implementation, the limiting groove includes a bottom wall and two side walls. The bottom wall is connected between the two side walls, and the included angle between one of the side walls and the bottom wall is an obtuse angle. Compared with one of the side walls, the other side wall is closer to the baffle. During the process of installing the battery pack into the energy storage cabinet, the pulley rolls along the inclined side wall to the bottom wall, realizing the pulley entering the limiting groove. The movement of the battery pack is relatively gentle, which can prevent the battery pack and the guide rail from being damaged. When the battery pack is pulled out from the energy storage cabinet, the pulley rolls along the inclined side wall to the bottom plate, realizing the pulley leaving the limiting groove, and the battery pack is relatively easy to be pulled out.

[0021] In a possible implementation, the pulleys are arranged at the edge of the bottom wall of the battery pack close to the rear wall of the battery pack. Correspondingly, the limiting grooves are also arranged at the bottom plate at one end of the guide rail away from the cabinet door.

[0022] In a possible implementation, the cabinet body includes multiple columns arranged at intervals along the length direction. Each column includes multiple upright posts, and the multiple upright posts extend along the height direction. Multiple battery packs are stacked between adjacent two columns; multiple guide rails are respectively arranged on adjacent two columns, and the guide rails on adjacent two columns are mirror-symmetrical in the length direction. The multiple guide rails are used to fix the multiple battery packs, and the side plate is fixedly connected to the multiple upright posts. The upright posts can provide a support perpendicular to the horizontal plane for the guide rails, so as to realize supporting the battery packs on the horizontal plane and improve the mechanical strength of the energy storage cabinet.

[0023] In a second aspect, the present application also provides an energy storage system. The energy storage system includes the energy storage cabinet in the first aspect 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.

[0024] In a third aspect, the present application also provides a battery pack. The battery pack includes a housing and multiple batteries. The housing is used to accommodate the multiple batteries. The outer wall of the housing is provided with a limiting block. 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 inclines toward the bottom surface.

[0025] In a possible implementation, the limiting block includes a first top surface, the first top surface is arranged parallel to the bottom surface in 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 among the first top surface, the limiting surface and the bottom surface.

[0026] In a possible implementation, 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 limiting surface and the bottom surface.

[0027] Fourthly, the present application further provides a battery bracket, the battery bracket 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 limiting plate and a bottom plate, the top plate and the bottom plate are arranged parallel to each other in a 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 inclines 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, and 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.

[0028] For the beneficial effects of the second aspect to the fourth aspect, reference can be made to the description of the beneficial effects of the first aspect, which will not be elaborated here. Description of the Drawings

[0029] Figure 1 It is an application scenario diagram of the energy storage cabinet provided by the present application;

[0030] Figure 2 It is a schematic structural diagram of the energy storage cabinet provided by the present application;

[0031] Figure 3 It is an assembly schematic diagram of the battery pack and the guide rail in the energy storage cabinet provided by the present application;

[0032] Figure 4 It is a schematic structural diagram of a guide rail in the energy storage cabinet provided by the present application;

[0033] Figure 5 It is a schematic structural diagram of a battery pack provided by the present application;

[0034] Figure 6 It is another schematic structural diagram of the battery pack provided by the present application;

[0035] Figure 7 It is another schematic structural diagram of the guide rail of the energy storage cabinet provided by the present application;

[0036] Figure 8 It is a front view of the guide rail of the energy storage cabinet provided by the present application;

[0037] Figure 9 Side view of the battery pack provided for this application;

[0038] Figure 10 When the battery pack is installed to Figure 4 Cross-sectional view of the guide rail and the battery pack at position B in;

[0039] Figure 11 When the battery pack is installed to Figure 4 Cross-sectional view of the guide rail and the battery pack at position C in;

[0040] Figure 12 When the battery pack is installed to Figure 4 Assembly schematic diagram of the fixing piece and the guide rail at position A in;

[0041] Figure 13 Structural schematic diagram of the fixing piece in the energy storage cabinet provided for this application.

[0042] Reference numerals:

[0043] 100 - Energy storage cabinet; 300 - DC / DC converter; 400 - Inverter; 500 - Power grid; 600 - Load; 700 - Photovoltaic panel; 110 - Cabinet body; 140 - Guide rail; 150 - Column; 141 - Bottom plate; 142 - Limiting plate; 1421 - Compression member; 143 - First top plate; 144 - Second top plate; 145 - Fixing piece; 1451 - First bending part; 14511 - Screw hole; 1452 - Second bending part; 1453 - 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 - Shell; 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 - Positioning pin. Detailed implementation manners

[0044] In order to make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be further described in detail below in conjunction with the accompanying drawings. However, the exemplary implementation manners can be implemented in various forms and should not be construed as being limited to the implementation manners described herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing positions and directions described in the embodiments of this application are all illustrative with reference to the drawings, but can be changed according to needs, and all changes made are included within the protection scope of this application. The accompanying drawings of the embodiments of this application are only used to illustrate the relative position relationship and do not represent the true scale.

[0045] Specific details are set forth in the following description to facilitate an understanding of the present application. However, the embodiments of the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the embodiments of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0046] 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.

[0047] For example, Figure 1 schematically shows a framework structure diagram of a photovoltaic system, as Figure 1 shown, the photovoltaic system includes a photovoltaic panel 700, a DC / DC converter 300, an energy storage cabinet 100, and a DC / AC converter 400. The photovoltaic panel 700 is used to convert solar energy into DC electrical energy. The DC / DC converter 300 is used to convert the DC electricity generated by the photovoltaic panel 700 into adjustable DC electricity, realizing dynamic control of the DC electricity generated by the photovoltaic panel 200, balancing the output power of each photovoltaic panel 700, and then outputting it to the energy storage cabinet 100 to store the electrical energy. The DC electricity output by the energy storage cabinet 300 is converted into AC electricity by the DC / AC converter 400 and output to the power grid 500. The AC electricity output by the DC / AC converter can also be used to supply power to the load 600. The load 600 can be an electrical device in an industrial park.

[0048] To meet the existing large-capacity energy storage requirements, the energy storage cabinet 100 includes a plurality of battery packs. During the installation of the battery packs, generally, after the battery packs are installed from the cabinet door of the energy storage cabinet to the battery bracket inside the energy storage cabinet, fixing measures are taken for the side of the battery pack facing the cabinet door, and there is a lack of restraint on the tail and the middle section of the battery pack. During the transportation of the battery packs, the battery packs are prone to vibration, which is likely to cause damage to the battery packs and the energy storage cabinet. Based on this, the embodiments of the present application provide an energy storage cabinet to provide a binding force to the battery packs, limit the vibration of the battery packs during transportation, and avoid damage to the battery packs and the energy storage cabinet during transportation or daily use.

[0049] The embodiments of the present application provide an energy storage cabinet 100. The structure of the energy storage cabinet 100 can be referred to Figure 2 the structure diagram of the energy storage cabinet 100 shown, Figure 3 the assembly diagram of the battery pack 200 and the guide rail 140 described, and Figure 4 the structure diagram of the guide rail 140 shown. In the coordinate directions of the following figures, the direction shown by the X-axis represents the length direction of the energy storage cabinet 100, the direction shown by the Y-axis represents the width direction of the energy storage cabinet 100, and the direction shown by the Z-axis represents the height direction of the energy storage cabinet 100.

[0050] Refer to Figures 2 to 4The energy storage cabinet 100 includes a cabinet 110, and a plurality of battery compartments 120 arranged along the X direction are provided in the cabinet 110. A row of battery clusters is provided in each battery compartment 120. The battery clusters include a plurality of battery packs 200, and the battery packs 200 can be stacked. It should be noted that the energy storage cabinet 100 provided in the embodiment of the present application may also include one battery compartment 120, that is, the energy storage cabinet 100 only includes one row of battery clusters. The size and dimensions of the energy storage cabinet 100 can be arbitrarily selected according to actual needs. Two side walls of each battery compartment 120 arranged oppositely along the X direction are provided with a plurality of pairs of guide rails 140 arranged oppositely along the X direction, and each pair of guide rails 140 includes two guide rails 140. The cabinet 110 is used to accommodate the guide rails 140 and the battery pack 200. The cabinet 110 is provided with a cabinet door (not shown in the figure), which is located at the opening of the energy storage cabinet 100. The two guide rails 140 extend along the Y direction, and the two guide rails 140 are mirror-symmetrical in the X direction. Each guide rail 140 is provided with a groove 141 extending along the Y direction, the opening direction of the groove 141 is opposite and faces the inside of the cabinet 110, and 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 a battery pack 200.

[0051] Accordingly, the structure of the battery pack 200 provided in the embodiment of the present application can refer to Figure 5 or Figure 6 The schematic diagram of the structure of the battery pack 200 is shown. 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 that are 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 block 220 of the battery pack 200 can be stuck in the groove 141, and the limit block 220 slides 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, and can provide Y-direction constraints for the battery pack 200, that is, limit the displacement of the battery pack 200 along the Y direction, which can solve the problem of fixing the battery pack 200 during transportation and avoid damage to the battery pack 200 and the energy storage cabinet 100 due to vibration during transportation.

[0052] In one embodiment, the orthographic projection of the groove 141 in the length direction is trapezoidal, and the orthographic projection of the limiting block 220 in the length direction is trapezoidal. The shapes of the limiting block 220 and the groove 141 are matched. The shapes of the limiting block 220 and the groove 141 are both trapezoidal, which is beneficial to clamping the limiting block 220 of the battery pack 200 in the groove 141 and enhancing the fixing strength of the battery pack 200.

[0053] In one embodiment, the part of the groove 141 where the opening width becomes narrower is used to abut against the limiting block 220 in the Z direction. During specific implementation, the structure of the guide rail 140 can refer to Figure 7 the structural schematic diagram of the guide rail 140 shown in Figure 8 and the front view of the guide rail 140 shown in. 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 lengths 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 arranged parallel to each other in the Z direction. In the Z direction, the positions of the first top plate 143 and the limiting plate 142 in each guide rail 140 are 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 towards the bottom plate 141, and 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 a plane or a curved surface.

[0054] Figure 9 For Figure 6 the front view of the limiting block 220 in the battery pack 200 shown in. The limiting block 220 includes a bottom surface 221 and a limiting surface 222. The bottom surface 221 is parallel to the bottom plate 141. In the Z direction, the position of the limiting surface 222 in the limiting block 220 is higher than the position of the bottom surface 221, and the limiting surface 222 is arranged parallel to the limiting plate 142. The minimum distance L2 between the limiting plate 142 and the bottom plate 141 is greater than or equal to the minimum distance L9 between the limiting surface 222 and the bottom plate 141. The limiting 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 limiting surface 222, and the distance L7 between the first top surface 223 and the bottom surface 221 is equal to the maximum distance L8 between the limiting surface 222 and the bottom surface 221. Refer to Figure 8 and Figure 9, the shape of the groove 141 is the same as that of the limiting block 220 of the battery pack 200, so that after the battery pack 200 slides in through the limiting block 220 of the battery pack 200, the limiting block 220 and the groove 141 can cooperate better with each other. It should be noted that the shapes of the limiting plate 142 and the limiting surface 222 need to be the same. When the limiting plate 142 is a plane, the limiting surface 222 is also a plane; when the limiting plate 142 is a curved surface, the limiting surface 222 is also a curved surface.

[0055] 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 lengths 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 parallel in the Z direction. In the Z direction, the positions of the first top plate 143 and the limiting plate 142 in each guide rail 140 are 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 towards 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 limiting block 220 of the battery pack 200 is not parallel to the bottom surface 221, the first top surface 223 of the limiting block 220 of the battery pack 200 is parallel to the first top plate 143, and the bottom surface 221 of the limiting block 220 of the battery pack 200 is parallel to and fits with the bottom plate 141 of the guide rail 140.

[0056] Figure 10 For when the battery pack 200 is installed to Figure 4 is a cross-sectional view of the guide rail 140 and the battery pack 200 at position B in. When the battery pack 200 is installed into the guide rail 140, the limiting block 220 is located between the limiting plate 142 and the first top plate 143. The limiting surface 222 is subjected to the binding force F of the limiting plate 142. The force F is decomposed into a component force F1 in the reverse direction of the Y direction and a component force F2 in the reverse direction of the Z direction. The limiting surface 222 is subjected to the binding force F, thereby restricting the vibration of the battery pack 200 in the Y direction and the Z direction.

[0057] In one embodiment, referring to Figure 8 and Figure 10 , the included angle ∠1 between the limiting plate 142 of the guide rail 140 and the horizontal plane where the Y direction is located is an acute angle, so that a wedge-shaped accommodation space is formed between the limiting plate 142 and the bottom plate 141. If ∠1 is too large, then F2 will be too small, and the vibration of the battery pack 200 cannot be well restricted in the Z direction. If ∠2 is too small, then F1 will be too small, and the vibration of the battery pack 200 cannot be well restricted in the Y direction. Therefore, ∠1 needs to be controlled within a suitable range, for example, it can be 15 - 60°.

[0058] In one embodiment, after the battery pack 200 slides into place, in order to enable the limiting surface 222 to better and more evenly receive the binding 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 referred to Figure 10 as shown. After the battery pack 200 slides into place, due to the arrangement of the compression member 1421, one side of the limiting plate 142 is in close contact with the compression member 1421, and the other side of the limiting surface 222 is in close contact with the compression member 1421, so that there is no gap between the limiting plate 142 and the limiting surface 222, ensuring the stability of the limiting block 220 of the battery pack 200 fixed in the groove 141.

[0059] In one embodiment, the guide rail 140 includes a second top plate 144. The second top plate 144 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 less than the distance between the first top plate 143 and the bottom plate 141. The positive projection of the limiting plate 142 in the Z direction is located between the positive projection of the first top plate 143 in the Z direction and the positive projection of the second top plate 144 in the Z direction. The limiting plate 142 is inclined. The higher end of the limiting plate 142 is connected to the first top plate 143, and the lower end of the limiting plate 142 is connected to the second top plate 144.

[0060] Correspondingly, the limiting block 220 of the battery pack 200 includes a second top surface 224. The second top surface 224 is located between the second top plate 144 and the bottom plate 141. 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. The distance between the second top surface 224 and the bottom surface 221 is less than the distance between the limiting surface 222 and the bottom surface 221. The positive projection of the limiting plate 142 in the Z direction covers the positive projection of the limiting surface 222 in the Z direction.

[0061] In one embodiment, the guide rail 140 includes a second top plate 144. The second top plate 144 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 positive projection of the limiting plate 142 in the Z direction is located between the positive projection of the first top plate 143 in the Z direction and the positive projection of the second top plate 144 in the Z direction. The limiting plate 142 is inclined. The higher end of the limiting plate 142 is connected to the first top plate 143, and the lower end of the limiting plate 142 is connected to the second top plate 144. Correspondingly, the second top surface 224 of the limiting block 220 of the battery pack 200 is not parallel to the bottom surface 221. The second top surface 224 of the limiting block 220 of the battery pack 200 is parallel to the second top plate 144. The bottom surface 221 of the limiting block 220 of the battery pack 200 is parallel to and fits with the bottom plate 141 of the guide rail 140.

[0062] Further, in order to enhance the fastening 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 referred to Figure 7 and Figure 8 As shown, the second top plate 144 is connected between the two limiting plates 142. The minimum distance L2 between one of the limiting plates 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 arranged at the end of the guide rail 140 away from the cabinet door. The angle ∠2 between the limiting plate 142 at the tail of the guide rail 140 and the horizontal plane where 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 tail of the guide rail 140 and the bottom plate 141. The magnitudes 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.

[0063] Correspondingly, a limiting block 220 can be provided at the tail of the side wall of the battery pack 200. The limiting block 220 of the battery pack 200 can be referred to Figure 11 as shown Figure 11 is a cross-sectional view of the guide rail 140 and the battery pack 200 when the battery pack 200 is installed at the position C in Figure 4 . When the battery pack 200 is installed in place, the limiting plate 142 at the tail of the guide rail 140, the limiting block 220 at the tail of the side wall of the battery pack 200 and the limiting plate 142 at the tail of the guide rail 140 are in contact. The limiting plate 142 provides a component force F3 in the opposite direction of the Y direction and a component force F4 in the opposite direction of the Z direction for the limiting surface 222, thereby restricting the vibration of the battery pack 200 in the Y direction and the Z direction. That is to say, a limiting plate 142 is provided in the middle and at the tail of the guide rail 140 respectively. A matching structure is formed between the guide rail 140 and the limiting block 220 of the battery pack 200 at the middle and the tail of the guide rail 140 respectively, so as to form multiple limit positions, realizing 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.

[0064] It should be understood that in order to further enhance the firmness of the battery pack 200 in the energy storage cabinet 100, multiple limiting plates 142 can be provided in the guide rail 140. Correspondingly, multiple limiting blocks 220 are provided on the battery pack 200, which is convenient for forming a multiple-limit structure between the guide rail 140 and the battery pack 200.

[0065] Refer to Figure 8 and Figure 9, To improve the installation efficiency of the battery pack 200, pulleys 230 can be provided on the bottom wall of the battery pack 200. The pulleys 230 can reduce the friction between the bottom wall of the battery pack 200 and the bottom plate 141, lower the wear rate between the battery pack 200 and the guide rail 140, and improve the installation efficiency. Correspondingly, 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 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 can provide a receiving space for the pulley 230, and the bottom wall of the battery pack 200 is in contact with the bottom plate 141 of the guide rail 140. This can prevent a gap from existing between the bottom wall of the battery pack 200 and the bottom plate 141 of the groove 141 due to the presence of the pulley 230, which may cause the battery pack 200 to tilt.

[0066] Referring to Figure 8 , the limiting groove 147 includes a bottom wall and two side walls. The bottom wall is connected between the two side walls. The angle between one of the side walls 1472 and the bottom wall 1471 is an obtuse angle. Compared with one of the side walls 1472, the other side wall is closer to the baffle 146. During the process of installing the battery pack 200 into the energy storage cabinet 100, the pulley 230 rolls through the inclined side wall 1472 to the bottom wall 1471, realizing the entry of the pulley 230 into the limiting groove 147. The movement of the battery pack 200 is relatively smooth, which can prevent the battery pack 200 and the guide rail 140 from being damaged. When the battery pack 200 is pulled out from the energy storage cabinet 100, the pulley 230 rolls through the inclined side wall 1472 to the bottom plate 141, realizing the departure of the pulley 230 from the limiting groove 147, and the battery pack 200 can be easily pulled out.

[0067] It should be noted that multiple pulleys 230 can be provided on the bottom wall of the battery pack 200, or only one pulley 230 can be provided. When only one pulley 230 is provided on the bottom wall of the battery pack 200, the pulley 230 is provided at the edge of the bottom wall of the battery pack 200 close to 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 correspondingly has multiple limiting grooves 147, and the multiple limiting grooves 147 respectively accommodate the multiple pulleys 230.

[0068] Continuing to refer to Figure 11 , each guide rail 140 includes a baffle 146. The baffle 146 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 to say, the baffle 146 is located at the tail end of the guide rail 140. After the battery pack 200 slides into place, it provides a blocking force for the battery pack 200 to prevent the battery pack 200 from continuing to slide in the Y direction and colliding with the rear wall 226 of the energy storage cabinet 100, damaging the rear wall 226 of the energy storage cabinet 100.

[0069] Further, 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 positive projection of the positioning hole 1461 in the Y direction covers the positive 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 circumferential binding force for the positioning pin 227 on the rear wall 226 of the battery pack 200, further restricting the vibration of the battery pack 200 during transportation and enhancing the fastening force between the battery pack 200 and the guide rail 140.

[0070] 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. Since the front wall 225 of the battery pack 200 faces the cabinet door, the front wall 225 can be fixed from the cabinet door. The battery pack 200 can be fixed by using a fixing piece 145. The fixing piece 145 is located at one end of the guide rail 140 close to the cabinet door, and the fixing piece 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 piece 145 can refer to Figure 12 and Figure 13 . Figure 12 For the assembly schematic diagram of the fixing piece 145 and the guide rail 140 when the battery pack 200 is installed at the position A in Figure 4 , Figure 13 is the structural schematic diagram of the fixing piece 145. The fixing piece 145 includes a first bending portion 1451 and a second bending portion 1452. The first bending portion 1451 and the second bending portion 1452 are perpendicular. The second bending portion 1452 can be connected to the side wall of the energy storage cabinet 100 to realize the fixed connection between the fixing piece 145 and the energy storage cabinet 100. The first bending portion 1451 is parallel to the front wall 225 of the battery pack 200. A plurality of screw holes 14511 are provided on the first bending portion 1451, and a plurality of screw holes 14511 are also provided at the positions corresponding to the plurality of screw holes 14511 on the front wall 225 of the battery pack 200. After the battery pack 200 is installed in place, the battery pack 200 can be fixed in the energy storage cabinet 100 through the cooperation of screws 1453 and studs.

[0071] 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.

[0072] The side plate 148 is provided with a plurality of through holes 1481, which are arranged in sequence and spaced apart along the width direction. The arrangement 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.

[0073] 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, and a plurality of battery packs 200 are stacked and arranged 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 The example shows that three pairs of mirror-image guide rails 140 are disposed inside the cabinet 110 , which can carry three battery packs 200 .

[0074] Based on the same inventive concept, the present application embodiment also provides an energy storage system. The application scenarios of the energy storage system can refer to Figure 1 The energy storage system includes the energy storage cabinet 100 and a power converter, 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 100, and / or the power converter is used to convert the DC power outputted by the energy storage cabinet 100 into AC power and output it to a load or a power grid.

[0075] Based on the same inventive concept, the present application also provides a battery bracket. The structure of the battery bracket can refer to Figure 4 , Figure 7 as well as Figure 8As shown. The battery bracket includes two guide rails 140 that are mirror-symmetrical along the first direction (X direction). Each of the two guide rails 140 extends along the second direction (Y direction). Each guide rail 140 includes a top plate, a limiting plate 142, and a bottom plate 141. The top plate and the bottom plate 141 are arranged parallel to each other along the third direction. In the energy storage cabinet 100, the positions of the limiting plate 142 and the top plate are higher than the position of the bottom plate 141 in the third direction (Z direction). The limiting plate 142 is connected to the top plate. The limiting plate 142 is inclined towards 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 bottom plate 141 and the top plate. The minimum distance L2 between the limiting plate 142 and the bottom plate 141 is greater than 0. Among them, the first direction, the second direction, and the third direction are perpendicular to each other.

[0076] In this application, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural.

[0077] It can be understood that in the embodiments of this application, the various numerical numbers involved are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The magnitude of the sequence numbers of the above processes does not mean the sequence of execution. The execution sequence of each process should be determined by its function and internal logic.

[0078] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in this application should be covered by the protection scope of this application.

Claims

1. An energy storage cabinet, It is 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, It is 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, It is 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, It is 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 1 or 2, It is characterized in that The 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 the baffle 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 to 5, It is 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 the positions of the first top plate and the limit plate in the guide rail are higher than the position of the bottom plate in the height direction, 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, It is characterized in that A compression piece is provided between the limiting plate and the limiting surface.

8. The energy storage cabinet according to claim 6 or 7, It is characterized in that The limiting block includes a first top surface, the first top surface is disposed 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 disposed parallel to the bottom plate, the distance between the second top plate and the bottom plate is less 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, characterized in that the limiting 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 limiting surface, the second top surface is disposed parallel to the bottom surface, the distance between the second top surface and the bottom surface is less than the distance between the limiting surface and the bottom surface, and 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 claim 9 or 10, characterized in that the guide rail includes two limiting plates, the two limiting plates are arranged in sequence along the width direction, the second top plate is connected between the two limiting plates, and 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, characterized in that the other limiting plate is disposed 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 a baffle and a side plate, the baffle is disposed parallel to the rear wall of the battery pack, the baffle is located at the other end of the guide rail away from the cabinet door, the side plate extends along the width direction, the side plate is perpendicular to and connected to the bottom plate and the limiting plate, and a plurality of through holes are provided on the side plate, and the plurality of through holes are arranged in sequence along the width direction.

14. The energy storage cabinet according to claim 13, characterized in that a pulley is provided on the bottom wall of the battery pack, a limiting groove is provided on the bottom plate, the limiting groove is recessed toward a side of the bottom plate away from the bottom wall of the battery pack, the limiting groove is used for accommodating 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, and the included angle between one side wall and the bottom wall is an obtuse angle, and the other side wall is closer to the baffle than the one side wall.

16. The energy storage cabinet according to claim 14 or 15, characterized in that the pulley is provided at an 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 a plurality of upright posts, the plurality of upright posts extend along the height direction, and a plurality of the battery packs are stacked between two adjacent columns of upright posts; a plurality of the guide rails are respectively provided on two adjacent columns of upright posts, the guide rails on two adjacent columns of upright posts are mirror-symmetrical in the length direction, the plurality of guide rails are used for fixing a plurality of the battery packs, and the side plate is fixedly connected with the plurality of upright posts.

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

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