Energy storage device, energy storage system and charging network

Abstract

The application provides an energy storage device, an energy storage system and a charging network. The energy storage device comprises a box body and a battery device. The box body contains the battery device, the box body comprises a first side beam and a hoisting assembly, the first side beam extends along a first direction, the hoisting assembly comprises a hoisting shaft and a shaft sleeve, the shaft sleeve is arranged through the first side beam and connected with the first side beam, the shaft sleeve comprises an extension part which extends beyond the first side beam along a second direction, the hoisting shaft is movably arranged in the shaft sleeve along the second direction to adjust the length of the hoisting shaft which extends out of the shaft sleeve to the outside of the box body, and the first direction, the second direction and the height direction of the box body are not coplanar and intersect with each other. The hoisting assembly further comprises a first reinforcing piece which is connected with the first side beam and the extension part. The energy storage device can improve the structural stability of the energy storage device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To improve the smoothness of electricity supply and ensure the normal operation of production and daily life, energy storage devices are needed. As devices that cyclically store and release electrical energy, energy storage devices store electrical energy or supply the stored energy to electrical devices through charging or discharging. Energy storage devices are widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0003] During the hoisting of energy storage devices, lifting shafts can be installed on the side beams of the device. A lifting device can then lift the shafts upwards to transfer the energy storage device. However, the side beams of the energy storage device are susceptible to deformation due to torsional forces during hoisting, affecting the reliability of the device during the process. Utility Model Content

[0004] This application provides an energy storage device, an energy storage system, and a charging network, which can improve the reliability of the energy storage device during the hoisting process.

[0005] In a first aspect, embodiments of this application provide an energy storage device, including a housing and a battery device; the housing houses the battery device, and the housing includes a first side beam and a hoisting assembly. The first side beam extends along a first direction, and the hoisting assembly includes a hoisting shaft and a bushing extending along a second direction. The bushing passes through and is connected to the first side beam, and the bushing includes an extension extending beyond the first side beam along the second direction. The hoisting shaft is movably inserted into the bushing along the second direction to adjust the length of the hoisting shaft extending beyond the bushing outside the housing. The first direction, the second direction, and the height direction of the housing are not coplanar and intersect each other. The hoisting assembly further includes a first reinforcing member, which connects the first side beam and the extension.

[0006] In the above technical solution, during the hoisting of the energy storage device, because the bushing passes through and connects to the first side beam, the hoisting shaft is subjected to an upward tensile force, causing the hoisting shaft to exert a torsional force on the first side beam through the bushing. By setting a first reinforcing member to connect the first side beam and the extension, on the one hand, the first reinforcing member can improve the strength of the first side beam and reduce the risk of damage to the first side beam; on the other hand, the first reinforcing member can extend the lever arm of the torsional force exerted by the bushing on the first side beam, reducing the risk of torsional deformation of the first side beam, thereby improving the reliability of the energy storage device during the hoisting process.

[0007] In some embodiments, the first reinforcing member includes a first connecting portion and a second connecting portion. Along a second direction, the first connecting portion is spaced apart from the first side beam, and is connected to a bushing. The second connecting portion connects the first side beam and the first connecting portion. By positioning the first connecting portion spaced apart from the first side beam and connected to the bushing, the first connecting portion can be positioned away from the first side beam, thereby extending the lever arm of the torsional force applied by the bushing to the first side beam and reducing the risk of damage to the first side beam.

[0008] In some embodiments, the first connecting portion is provided with a first through hole, and the bushing passes through the first through hole. In this way, the first through hole can restrict the position of the bushing, improve the restraining effect on the bushing, and help improve the connection stability between the first connecting portion and the bushing.

[0009] In some embodiments, along the height direction of the housing, each of the opposite ends of the first connecting portion is connected to a second connecting portion, and the second connecting portions connected to the opposite ends of the first connecting portion are respectively located on both sides of the extension. This increases the contact area between the first side beam and the first reinforcing member, improving the connection strength between them; furthermore, the two first connecting portions enhance the structural strength of the first reinforcing member, reducing the risk of damage during force transmission between the first side beam and the bushing, and improving the reliability of the energy storage device during hoisting.

[0010] In some embodiments, the first side beam includes a first wall and a second wall disposed opposite to each other along a second direction. Both the first wall and the second wall are provided with a second through hole. A bushing passes through the second through hole, and an extension extends beyond the first wall in the direction from the second wall to the first wall. In this way, on the one hand, the installation difficulty of the first reinforcing member is reduced, and on the other hand, the lever arm of the torsional force applied by the bushing to the first side beam is extended, reducing the risk of damage to the first side beam and improving the structural stability of the energy storage device.

[0011] In some embodiments, at least one end of the first side beam is flush with the first stiffener along the height direction. This flush alignment of the end of the first side beam with the first stiffener facilitates the installation and positioning of the first stiffener, reducing the difficulty of setting up the first stiffener.

[0012] In some embodiments, at least one end of the first side beam extends beyond the first stiffener along the height direction. This reduces the volume occupied by the first stiffener and optimizes the spatial layout of the housing.

[0013] In some embodiments, the first reinforcing member connects the first wall and the extension of the bushing. In this way, the first reinforcing member can enhance the strength of the first wall and also extend the lever arm of the torsional force exerted by the bushing on the first wall, reducing the risk of damage to the first wall and thus improving the structural stability of the first side beam.

[0014] In some embodiments, along the second direction, the second wall faces the outside of the housing. In this way, the extension is located on the side of the first side beam away from the outside of the housing, which can conceal the extension inside the housing, reduce the volume occupied by the energy storage device, and help improve the volumetric energy density of the energy storage device.

[0015] In some embodiments, the first reinforcing member is welded to the extension. This makes the connection between the first reinforcing member and the extension more stable, improving the structural stability of the first reinforcing member and the extension.

[0016] In some embodiments, the first reinforcing member is welded to the first side beam. This makes the connection between the first reinforcing member and the first side beam more stable, improving the structural stability of both the first reinforcing member and the first side beam.

[0017] In some embodiments, the first reinforcing member is welded to the extension; the first reinforcing member is also welded to the first side beam. This makes the connection between the first reinforcing member, the extension, and the first side beam more stable, improving the positional stability of the first reinforcing member, the extension, and the first side beam, thereby enhancing the structural stability of the energy storage device.

[0018] In some embodiments, at least one end of the lifting shaft is provided with a limiting member, which abuts against the bushing to limit the range of movement of the lifting shaft. In this way, the limiting member can restrict the movement of the lifting shaft, thereby reducing the risk of the lifting shaft falling off the first side beam or reducing the difficulty of the lifting shaft being fully inserted into the bushing without being easy to extend out of the bushing, thus reducing the difficulty of using the lifting shaft.

[0019] In some embodiments, the hoisting assembly further includes a blocking member movably disposed on the first side beam and located outside the housing. The blocking member has a first position and a second position, and is configured to: restrict the hoisting shaft from extending outward from the housing bushing in the first position, and allow the hoisting shaft to extend outward from the housing bushing in the second position. Thus, when the blocking member is in the first position, it can restrict the hoisting shaft from extending outward from the bushing, reducing the difficulty of transporting the energy storage device.

[0020] In some embodiments, the first side beam is located at the bottom of the housing. This high-strength first side beam also supports the battery assembly, improving the structural stability of the energy storage device.

[0021] In some embodiments, the first direction is parallel to the length direction of the housing. This places the first side beam on one side of the housing along its width, which helps reduce the difficulty of hoisting the energy storage device.

[0022] In some embodiments, the first side beam is provided with multiple lifting assemblies, which are spaced apart along a first direction. This reduces the stress on individual lifting assemblies, making the stress on the energy storage device more uniform during lifting and reducing the difficulty of lifting the energy storage device.

[0023] In some embodiments, the housing includes two first side beams spaced apart along a second direction, and each first side beam is provided with at least one lifting assembly. This smaller spacing between the two first side beams helps reduce the tensile force required to lift the energy storage device, thus lowering the difficulty of lifting the energy storage device.

[0024] In some embodiments, along the height direction of the housing, at least one side of the first side beam is connected to a second reinforcing member, and in a projection plane perpendicular to the height direction, at least a portion of the orthographic projection of the second reinforcing member lies within the orthographic projection of the bushing. Thus, the second reinforcing member can enhance the strength of the location where the first side beam is mounted on the bushing, reducing the risk of damage to the first side beam.

[0025] In some embodiments, the housing includes a support beam and two first side beams, the two first side beams being spaced apart along a second direction. The support beam is located between the two first side beams and connected to at least one of the first side beams. The support beam is configured to support the first side beams along the second direction. Along the first direction, the minimum distance between the support beam and the bushing is 10mm-350mm. A minimum distance of 10mm or more between the support beam and the bushing along the first direction reduces the difficulty of installing the bushing and the hanger shaft; a minimum distance of 350mm or less strengthens the position of the first side beam where the bushing is installed. Therefore, a minimum distance of 10mm-350mm between the support beam and the bushing balances reducing the difficulty of installing the bushing and the hanger shaft while strengthening the position of the first side beam where the bushing is installed.

[0026] In some embodiments, support beams are provided on both sides of the bushing along the first direction. This enhances the positional strength of the first side beam where the bushing is located, reducing the risk of deformation and damage to the first side beam.

[0027] In some embodiments, along the second direction, the opposite ends of the support beam are respectively connected to the two first side beams. In this way, the support beam can increase the strength of the two first side beams and reduce the risk of deformation and damage to the two first side beams.

[0028] In some embodiments, the enclosure further includes a central beam extending along a first direction and positioned between two first side beams along a second direction. Both first side beams are connected to the central beam via at least one support beam. This central beam helps reduce the length of the support beams and increases their strength, thereby further enhancing the structural strength of the enclosure and improving the structural stability of the energy storage device.

[0029] Secondly, embodiments of this application provide an energy storage system, including an energy storage converter and an energy storage device provided in any of the embodiments of the first aspect, wherein the energy storage converter is electrically connected to the energy storage device.

[0030] Thirdly, embodiments of this application provide a charging network, including a charging pile and an energy storage device provided in any of the embodiments of the first aspect, wherein the energy storage device is used to provide electrical energy to the charging pile. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a charging network provided in some embodiments of this application; Figure 2 This application provides schematic diagrams of the structure of an energy storage system according to some embodiments. Figure 3 This is a schematic diagram of the structure of an energy storage device provided in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 5 Schematic diagrams of the structure of the energy storage device provided in some embodiments of this application; Figure 6 This is a schematic diagram of the structure of the first side beam provided in some embodiments of this application; Figure 7 for Figure 6 AA section view; Figure 8 This is a schematic diagram of the assembly of the first reinforcing member and the bushing provided in some embodiments of this application; Figure 9 This is a partial structural schematic diagram of an energy storage device provided in some embodiments of this application; Figure 10 A schematic diagram of the assembly of the first reinforcing member and the bushing provided for some embodiments of this application; Figure 11 Partial structural schematic diagrams of energy storage devices provided for some embodiments of this application; Figure 12 An assembly diagram of the hoisting components, blocking elements, and first side beam provided for some embodiments of this application; Figure 13 A partial structural schematic diagram of an energy storage device provided in some embodiments of this application; Figure 14 Partial structural schematic diagrams of energy storage devices provided in other embodiments of this application; Figure 15The present application also provides partial structural schematic diagrams of energy storage devices according to some embodiments.

[0033] Icons: 1-First side beam; 11-First outer surface; 12-Second outer surface; 13-First wall; 14-Second wall; 15-Second through hole; 16-Second reinforcing member; 2-Support beam; 3-Intermediate beam; 4-Second side beam; 5-Separator; 10-Box; 20-Battery assembly; 201-Battery box; 2011-First battery box; 2012-Second battery box; 202-Battery cell; 30-Lifting assembly; 301-Lifting shaft; 302-Shaft sleeve ; 3021 - Extension; 303 - First reinforcing member; 3031 - First connecting part; 30311 - First through hole; 3032 - Second connecting part; 304 - Limiting member; 3041 - First limiting member; 3042 - Second limiting member; 305 - Blocking member; 100 - Energy storage device; 200 - Charging pile; 300 - Energy storage converter; 1000 - Charging network; 2000 - Energy storage system; X - First direction; Y - Second direction; Z - Height direction. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0036] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0037] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0038] In this application, "multiple" means two or more (including two).

[0039] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0040] The battery mentioned in the embodiments of this application may be a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0041] In some embodiments, the battery can be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0042] In some embodiments, the battery may be a battery pack, which includes a housing and individual battery cells, wherein the individual battery cells or battery modules are housed in the housing.

[0043] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0044] A single battery cell typically includes an electrode assembly. The electrode assembly comprises a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0045] Optionally, the electrode assembly has a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0046] Optionally, the electrode assembly has a stacked structure.

[0047] Optionally, the electrode assembly can be cylindrical, flat, or polygonal in shape.

[0048] In some embodiments, the energy storage device may include a battery unit and a housing, with the battery unit housed within the housing. The battery unit includes multiple individual battery cells.

[0049] In some embodiments, the energy storage device may further include a converter electrically connected to the battery device to convert the DC power of the battery device into AC power so as to enable the battery device to output power, or to convert the AC power of the external circuit into DC power so as to enable the battery device to store power.

[0050] In some embodiments, the energy storage device may further include a control module for electrically controlling the battery device.

[0051] In some embodiments, the energy storage device may further include a thermal management module for managing the temperature of the battery device.

[0052] Energy storage devices can be applied to energy storage systems, which can include energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to users or electrical equipment during peak hours. Wind power systems collect wind energy from wind turbines, convert it into electricity, and then store it in an energy storage system. Solar power systems convert solar energy into electricity, store it in an energy storage system, and supply it to users as needed. Mobile power systems can power equipment in areas inaccessible by the mains grid, such as remote mountainous areas and isolated wilderness areas. Temporary power supply systems can provide power to users when there is insufficient electricity.

[0053] To facilitate the relocation of energy storage devices, lifting assemblies can be installed on the side beams of the devices. These assemblies, in conjunction with lifting equipment, enable the lifting and relocation of the energy storage devices. The lifting assembly typically includes a lifting shaft and a bushing. The bushing is mounted on the side beam, with part of the lifting shaft inserted into the bushing and the other part extending out to engage with the lifting equipment for lifting and relocation of the energy storage device. During the lifting process, the lifting shaft is subjected to an upward pulling force from the lifting equipment, causing it to exert a torsional force on the side beam through the bushing. Under this torsional force, the side beam is prone to torsional deformation, increasing the risk of damage to the energy storage device's casing.

[0054] In view of this, in order to reduce the risk of damage to the housing, this application provides an energy storage device, including a housing and a battery device; the housing houses the battery device, the housing includes a first side beam and a lifting assembly, the first side beam extends along a first direction, the lifting assembly includes a lifting shaft and a bushing extending along a second direction, the bushing passes through the first side beam and is connected to the first side beam, the bushing includes an extension extending beyond the first side beam along the second direction, the lifting shaft is movably inserted into the bushing along the second direction to adjust the length of the lifting shaft extending beyond the bushing outside the housing, the first direction, the second direction and the height direction of the housing are not coplanar and intersect each other; wherein, the lifting assembly also includes a first reinforcing member, the first reinforcing member connecting the first side beam and the extension.

[0055] In such an energy storage device, by setting a first reinforcing member to connect the first side beam and the extension, on the one hand, the first reinforcing member can improve the strength of the first side beam and reduce the risk of damage to the first side beam; on the other hand, the first reinforcing member can extend the lever arm of the torsional force applied by the bushing to the first side beam, reducing the risk of torsional deformation of the first side beam, thereby improving the reliability of the energy storage device during the hoisting process.

[0056] The following description, in conjunction with the accompanying drawings, illustrates the energy storage device, the energy storage system using the energy storage device, and the charging network.

[0057] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Embodiments of this application provide a charging network 1000, which includes a charging pile 200 for charging electrical equipment. The charging network 1000 may also include an energy storage device 100, which is electrically connected to the charging pile 200 and provides electrical energy to the charging pile 200.

[0058] It should be noted that the charging pile 200 is electrically connected to the battery cells 202 in the energy storage device 100 via cables. The battery cells 202 can supply their stored electrical energy to the charging pile 200. The charging pile 200 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's energy. The application of the energy storage device 100 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to improve the flexibility of the charging network 1000 during deployment.

[0059] In a charging network 1000, there can be one charging pile 200, and the energy storage device 100 provides power to the one charging pile 200; there can also be multiple charging piles 200, and the energy storage device 100 provides power to multiple charging piles 200.

[0060] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 100 and two charging piles 200, with the energy storage device 100 providing power to the two charging piles 200.

[0061] The energy storage device 100 may include a battery device 20, which is electrically connected to the charging pile 200 so that the battery device 20 can provide power to the charging pile 200.

[0062] Please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of this application. Embodiments of this application provide an energy storage system 2000. The energy storage system 2000 may include an energy storage device 100 and an energy storage converter 300 (PCS, Power Conversion System), with the energy storage device 100 and the energy storage converter 300 electrically connected.

[0063] The energy storage converter 300 is a device that connects external equipment to the energy storage device 100. The external equipment can be the power grid, electrical equipment, etc. The energy storage converter 300 has a DC side and an AC side. The DC side is used for electrical connection with the energy storage device 100, and the AC side is used for connection with the external equipment.

[0064] When the energy storage device 100 is in the charging state, the energy storage converter 300 acts as a rectifier to convert the electrical energy from the AC power on the AC side into DC power and store it in the energy storage device 100. When the energy storage device 100 is in the discharging state, the energy storage converter 300 acts as an inverter to convert the electrical energy stored in the energy storage device 100 from the DC power on the DC side into AC power and deliver it to external equipment.

[0065] In the energy storage system 2000, one energy storage converter 300 can be configured with one energy storage device 100 or multiple energy storage devices 100. In an embodiment where one energy storage converter 300 is configured with multiple energy storage devices 100, the energy storage devices 100 can be two, three, four, five, six, seven, eight or more.

[0066] In the energy storage system 2000, one energy storage device 100 may be equipped with multiple energy storage converters 300, at least two of which have different maximum operating voltages and can be adapted to the energy storage device 100; or one energy storage device 100 may be connected to only one energy storage converter 300, which has multiple different maximum operating voltages and can be adapted to the energy storage device 100.

[0067] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application. The energy storage device 100 includes a housing 10, and a battery device 20 is disposed inside the housing 10.

[0068] As an example, the energy storage device 100 can be an energy storage container, an energy storage cabinet, etc.

[0069] As an example, energy storage device 100 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 100. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 100, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply.

[0070] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of a battery device 20 provided in some embodiments of this application. The battery device 20 may include a battery case 201 and battery cells 202, wherein the battery case 201 is used to house the battery cells 202.

[0071] The battery box 201 has an enclosed space inside for accommodating individual battery cells 202. The battery box 201 can have various structures. In some embodiments, the battery box 201 may include a first battery box 2011 and a second battery box 2012, which are interlocked. The first battery box 2011 and the second battery box 2012 can have various shapes, such as cuboids or cylinders. The first battery box 2011 can be a hollow structure open on one side, and the second battery box 2012 can also be a hollow structure open on one side. The open side of the second battery box 2012 interlocks with the open side of the first battery box 2011, thus forming a battery box 201 with an enclosed space. Alternatively, the first battery box 2011 can be a hollow structure open on one side, and the second battery box 2012 can be a plate-like structure, with the second battery box 2012 interlocked with the open side of the first battery box 2011, thus forming a battery box 201 with a receiving cavity.

[0072] In the battery device 20, there can be one or more battery cells 202. If there are multiple battery cells 202, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 202 are connected in both series and parallel. Alternatively, multiple battery cells 202 can be first connected in series, in parallel, or in a mixed configuration to form a battery module, and then the multiple battery modules can be connected in series, in parallel, or in a mixed configuration to form a whole, which is then housed in the battery box 201. Another option is that all battery cells 202 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole consisting of all battery cells 202 is housed in the battery box 201.

[0073] Please refer to Figure 5, Figure 6 and Figure 7 , Figure 5 A schematic diagram of the structure of an energy storage device 100 provided in some embodiments of this application; Figure 6 This is a structural schematic diagram of the first side beam 1 provided in some embodiments of this application; Figure 7 for Figure 6 A sectional view (AA). This application provides an energy storage device 100, including a housing 10 and a battery device 20. The housing 10 houses the battery device 20 and includes a first side beam 1 and a lifting assembly 30. The first side beam 1 extends along a first direction X. The lifting assembly 30 includes a lifting shaft 301 extending along a second direction Y and a bushing 302. The bushing 302 passes through and is connected to the first side beam 1. The bushing 302 includes an extension 3021 extending beyond the first side beam 1 along the second direction Y. The lifting shaft 301 is movably inserted into the bushing 302 along the second direction Y to adjust the length of the lifting shaft 301 extending beyond the bushing 302 outside the housing 10. The first direction X, the second direction Y, and the height direction Z of the housing 10 are not coplanar and intersect each other. The lifting assembly 30 also includes a first reinforcing member 303, which connects the first side beam 1 and the extension 3021.

[0074] The housing 10 has a receiving space, within which the battery device 20 is housed. The housing 10 can contain one or more battery devices 20. In embodiments where there are multiple battery devices 20, the multiple battery devices 20 can be arranged in an array within the housing 10.

[0075] The number of first side beams 1 can be one or more. In embodiments with multiple first side beams 1, adjacent first side beams 1 can be spaced apart or in contact with each other. The first side beam 1 extends along a first direction X, which can be parallel to the length direction of the box 10 and the second direction Y parallel to the width direction of the box 10; or the first direction X can be parallel to the width direction of the box 10 and the second direction Y parallel to the length direction of the box 10. The first side beam 1 can be located at the top or bottom of the box 10. The included angle between any two of the first direction X, the second direction Y, and the height direction Z can be acute, right, or obtuse, and the three are not in the same plane. For example, the first direction X, the second direction Y, and the height direction Z are perpendicular to each other.

[0076] The first side beam 1 can be a solid columnar structure or a hollow tubular structure. The shape of the first side beam 1 can be cylindrical, cuboid, etc. The first side beam 1 has a first outer surface 11 and a second outer surface 12 arranged opposite each other along the second direction Y. The part of the bushing 302 that extends beyond the first outer surface 11 along the direction from the second outer surface 12 to the first outer surface 11 is the extension 3021 of the bushing 302 extending beyond the first side beam 1 along the second direction Y.

[0077] The first side beam 1 may have a through hole, and the bushing 302 passes through the through hole of the first side beam 1. The bushing 302 may be welded, inserted, snapped, or fastened to the first side beam 1; wherein, the fastener may be a bolt. A portion of the bushing 302 is inserted into the first side beam 1, and another portion extends beyond the first outer surface 11 along the direction from the second outer surface 12 to the first outer surface 11. The portion of the bushing 302 extending beyond the first outer surface 11 is the extension 3021. In an embodiment where the first outer surface 11 faces outwards towards the housing 10 along the second direction Y, the extension 3021 is the portion of the bushing 302 that extends beyond the first side beam 1 and protrudes outside the housing 10. In an embodiment where the first outer surface 11 faces inwards towards the housing 10 along the second direction Y, the extension 3021 is the portion of the bushing 302 that extends beyond the first side beam 1 and is concealed inside the housing 10. The first outer surface 11 and the second outer surface 12 are both outer surfaces of the first side beam 1. Both the first outer surface 11 and the second outer surface 12 can be part of the outer surface of the housing 10; alternatively, one can be part of the outer surface of the housing 10 and the other can face the interior of the housing 10. For example, the housing 10 has a bottom wall disposed along the height direction Z, the first outer surface 11 is disposed facing the bottom wall, and the second outer surface 12 is part of the outer surface of the housing 10.

[0078] The bushing 302 has a through hole along the second direction Y. The lifting shaft 301 is movably inserted into the through hole of the bushing 302 along the second direction Y. The lifting shaft 301 can retract into the bushing 302 to be concealed inside the housing 10, reducing the space occupied by the energy storage device 100. The lifting shaft 301 can also partially extend out of the first side beam 1, so that part of the lifting shaft 301 is located outside the housing 10 and the other part is located inside the bushing 302. The part of the lifting shaft 301 outside the housing 10 can cooperate with the lifting tool to facilitate the lifting of the energy storage device 100. The length of the part of the lifting shaft 301 extending outside the housing 10 is adjustable so that the lifting shaft 301 can be adapted to different lifting tools and working conditions.

[0079] The first reinforcing member 303 can be connected to the surface of the first side beam 1, or it can be partially inserted into the first side beam 1. The first reinforcing member 303 can be welded, snapped, inserted, or fastened to the first side beam 1, and the first reinforcing member 303 can be welded, snapped, inserted, or fastened to the extension 3021; ​​wherein, the fastener can be a bolt.

[0080] In this embodiment, during hoisting of the energy storage device 100, the bushing 302 passes through and connects to the first side beam 1, causing the hoisting shaft 301 to experience an upward pulling force. This force, through the bushing 302, applies a torsional force to the first side beam 1 in the direction of its extension. By providing a first reinforcing member 303 to connect the first side beam 1 and the extension 3021, the first reinforcing member 303 can, on the one hand, increase the strength of the first side beam 1 and reduce the risk of damage to the first side beam 1; on the other hand, the first reinforcing member 303 can extend the lever arm of the torsional force applied by the bushing 302 to the first side beam 1, reducing the risk of torsional deformation of the first side beam 1, thereby improving the reliability of the energy storage device 100 during hoisting.

[0081] In some embodiments, please continue to refer to Figure 7 And further refer to Figure 8 , Figure 8 This is a schematic diagram of the assembly of the first reinforcing member 303 and the bushing 302 provided in some embodiments of this application. The first reinforcing member 303 includes a first connecting portion 3031 and a second connecting portion 3032. Along the second direction Y, the first connecting portion 3031 is spaced apart from the first side beam 1. The first connecting portion 3031 is connected to the bushing 302, and the second connecting portion 3032 connects the first side beam 1 and the first connecting portion 3031.

[0082] The first connecting portion 3031 is spaced apart from the first side beam 1, so that the first connecting portion 3031 is located away from the first side beam 1. The first connecting portion 3031 is located on the side of the first outer surface 11 opposite to the second outer surface 12, so that the connection position between the first connecting portion 3031 and the bushing 302 can be away from the first side beam 1. The second connecting portion 3032 connects the first side beam 1 and the first connecting portion 3031. The first connecting portion 3031 can transmit the force to the first side beam 1 through the second connecting portion 3032, thereby improving the positional stability of the first connecting portion 3031. The second connecting portion 3032 can pass through the first side beam 1 or be connected to the surface of the first side beam 1. In the embodiment where the second connecting portion 3032 is connected to the surface of the first side beam 1, the second connecting portion 3032 can be connected to the first outer surface 11 or to the surface of the first side beam 1 adjacent to the first outer surface 11.

[0083] In this embodiment, by setting the first connecting part 3031 to be spaced apart from the first side beam 1 and connecting the first connecting part 3031 to the bushing 302, the first connecting part 3031 can be set away from the first side beam 1. During the hoisting process, the hoisting shaft 301 applies a torsional force to the bushing 302. The force points of the bushing 302 and the first connecting part 3031 can be further away from the first side beam 1, thereby extending the lever arm of the torsional force on the first side beam 1 and reducing the risk of torsional damage to the first side beam 1.

[0084] In some embodiments, please continue to refer to Figure 7 The first connecting part 3031 is provided with a first through hole 30311, and the bushing 302 passes through the first through hole 30311.

[0085] The bushing 302 can be inserted through the first through hole 30311 so that the bushing 302 abuts against the wall of the first through hole 30311, thereby connecting the first connecting part 3031 and the bushing 302; or the bushing 302 can be welded or bonded to the wall of the first through hole 30311, thereby connecting the first connecting part 3031 and the bushing 302.

[0086] In this embodiment, the first through hole 30311 can restrict the position of the bushing 302, improve the restriction effect on the bushing 302, and help improve the connection stability between the first connecting part 3031 and the bushing 302.

[0087] In some embodiments, please refer to Figure 9 and Figure 10 , Figure 9 A partial structural schematic diagram of an energy storage device 100 provided in some embodiments of this application; Figure 10 This is a schematic diagram of the assembly of the first reinforcing member 303 and the bushing 302 provided in some embodiments of this application. Along the height direction Z of the housing 10, the two opposite ends of the first connecting part 3031 are connected to the second connecting part 3032, which are located on both sides of the extension 3021.

[0088] The first connecting part 3031 and the two second connecting parts 3032 can be integrally formed or separately provided and connected; for example, the first connecting part 3031 and the two second connecting parts 3032 are integrally bent.

[0089] The extension 3021 of the bushing 302 passes between the two second connecting portions 3032 and is connected to the first connecting portion 3031.

[0090] In this embodiment, on the one hand, the contact area between the first side beam 1 and the first reinforcing member 303 is increased, thereby improving the connection strength between the first side beam 1 and the first reinforcing member 303; on the other hand, the two first connecting parts 3031 can improve the structural strength of the first reinforcing member 303, reduce the risk of damage to the first reinforcing member 303 when force is transmitted between the first side beam 1 and the bushing 302, and improve the reliability of the energy storage device 100 during the hoisting process.

[0091] In some embodiments, please continue to refer to Figure 9The first side beam 1 includes a first wall 13 and a second wall 14 arranged opposite each other along the second direction Y. Both the first wall 13 and the second wall 14 are provided with a second through hole 15. The bushing 302 passes through the second through hole 15, and the extension 3021 extends beyond the first wall 13 along the direction from the second wall 14 to the first wall 13.

[0092] Both the first wall 13 and the second wall 14 are provided with a second through hole 15. The bushing 302 passes through the second through hole 15 and is connected to the hole wall of the second through hole 15. The bushing 302 can be welded or bonded to the hole wall of the second through hole 15.

[0093] The connection point between the first reinforcing member 303 and the extension 3021 is located on the side of the first wall 13 away from the second wall 14, and the connection point is at a distance from the first wall 13 in the second direction Y.

[0094] The first side beam 1 can be a hollow structure. The first wall 13 and the second wall 14 are arranged opposite each other along the second direction Y. The first wall 13 can be the wall portion of the first side beam 1 facing the outside of the box 10; the first wall 13 can also be the wall portion of the first side beam 1 facing away from the outside of the box 10. The surface of the first wall 13 facing away from the second wall 14 is the first outer surface 11, and the surface of the second wall 14 facing away from the first wall 13 is the second outer surface 12. The first reinforcing member 303 is connected to the first outer surface 11, and the connection position of the first reinforcing member 303 and the extension 3021 is spaced apart from the first outer surface 11 along the second direction Y, so that there is a distance between them. The first reinforcing member 303 can be bonded, welded, or fastened to the first outer surface 11, and the fastener can be a bolt.

[0095] In this embodiment, on the one hand, the installation difficulty of the first reinforcing member 303 is reduced, and on the other hand, the lever arm of the torsional force applied by the bushing 302 to the first side beam 1 is extended, reducing the risk of damage to the first side beam 1 and improving the structural stability of the energy storage device 100.

[0096] In some embodiments, along the second direction Y, the first outer surface 11 is the surface of the first side beam 1 that faces away from the outside of the box body 10.

[0097] Along the second direction Y, the second outer surface 12 faces the outside of the housing 10, and the first outer surface 11 faces away from the outside of the housing 10, such that the extension 3021 is located on the first side beam 1 facing away from the outside of the housing 10.

[0098] In this embodiment, the first reinforcing member 303 is located inside the first side beam 1. On the one hand, it can reduce the space occupied by the energy storage device 100 and increase the volumetric energy density of the energy storage device 100. On the other hand, it can reduce the risk of the first reinforcing member 303 being accidentally touched and damaged, and improve the structural stability of the energy storage device 100.

[0099] In some embodiments, at least one end of the first side beam 1 is flush with the first reinforcing member 303 along the height direction Z.

[0100] Along the height direction Z, the first side beam 1 has opposite top and bottom ends, and the first reinforcing member 303 has a third surface and a fourth surface disposed opposite each other along the height direction Z, with the third surface located above the fourth surface. It is possible that only the top end of the first side beam 1 is flush with the third surface; or only the bottom end of the first side beam 1 is flush with the fourth surface; or the top end of the first side beam 1 is flush with the third surface and the bottom end of the first side beam 1 is flush with the fourth surface.

[0101] In this embodiment, the fact that the end of the first side beam 1 is flush with the first reinforcing member 303 is beneficial for the installation and positioning of the first reinforcing member 303 and reduces the difficulty of setting up the first reinforcing member 303.

[0102] In some embodiments, at least one end of the first side beam 1 extends beyond the first reinforcement 303 along the height direction Z.

[0103] The top of the first side beam 1 may extend beyond the third surface, and the top of the first side beam 1 may be located above the third surface; the bottom of the first side beam 1 may extend beyond the fourth surface, or it may be flush with the fourth surface. Alternatively, the bottom of the first side beam 1 may extend beyond the fourth surface, and the bottom of the first side beam 1 may be located below the fourth surface, while the top of the first side beam 1 may be flush with the third surface.

[0104] In this embodiment, by setting at least one end of the first side beam 1 to extend beyond the first reinforcing member 303 along the height direction Z, the volume occupied by the first reinforcing member 303 can be reduced, and the spatial layout of the box 10 can be optimized.

[0105] In some embodiments, the first reinforcement 303 connects the first wall 13 and the extension 3021 of the bushing 302.

[0106] The first reinforcing member 303 can be connected to the surface of the first wall 13 opposite to the second wall 14, or it can be inserted through the first wall 13. The first reinforcing member 303 can be connected to the first wall 13 by pin, welding or fastener, wherein the fastener can be a bolt.

[0107] In this embodiment, the first reinforcing member 303 can enhance the strength of the first wall 13 and extend the lever arm of the torsional force applied by the bushing 302 to the first wall 13, thereby reducing the risk of damage to the first wall 13 and improving the structural stability of the first side beam 1.

[0108] In some embodiments, the first reinforcement 303 is welded to the extension 3021.

[0109] In this embodiment, the connection between the first reinforcing member 303 and the extension 3021 is more stable, which improves the structural stability of the first reinforcing member 303 and the extension 3021.

[0110] In some embodiments, the first reinforcing member 303 is welded to the first side beam 1.

[0111] In this embodiment, the connection between the first reinforcing member 303 and the first side beam 1 is more stable, which improves the structural stability of the first reinforcing member 303 and the first side beam 1.

[0112] In some embodiments, the first reinforcing member 303 is welded to the extension 3021. The first reinforcing member 303 is also welded to the first side beam 1.

[0113] In this embodiment, the connection between the first reinforcing member 303, the extension 3021 and the first side beam 1 is more stable, which improves the positional stability of the first reinforcing member 303, the extension 3021 and the first side beam 1, thereby improving the structural stability of the energy storage device 100.

[0114] In some embodiments, please refer to Figure 11 , Figure 11 This is a partial structural schematic diagram of an energy storage device 100 provided in some embodiments of this application. In some embodiments, at least one end of the lifting shaft 301 is provided with a limiting member 304, which is used to abut against the bushing 302 to limit the range of movement of the lifting shaft 301.

[0115] The lifting shaft 301 may have a limiting element 304 at only one end along the second direction Y, or the lifting shaft 301 may have a limiting element 304 at both ends along the second direction Y.

[0116] In this embodiment, the limiting member 304 can restrict the movement of the hanging shaft 301, thereby reducing the risk of the hanging shaft 301 falling off the first side beam 1 or reducing the difficulty of the hanging shaft 301 being fully inserted into the bushing 302 without being easy to extend out of the bushing 302, thus reducing the difficulty of using the hanging shaft 301.

[0117] In some embodiments, the limiting member 304 may include a first limiting member 3041, which is disposed on the side of the lifting shaft 301 away from the outside of the housing 10. The first limiting member 3041 is configured to limit the extension length of the lifting shaft 301 to the outside of the housing 10 through the bushing 302.

[0118] The first limiting member 3041 is located on the side of the first side beam 1 facing away from the outside of the housing 10. The first limiting member 3041 is connected to the hanging shaft 301. During the movement of the hanging shaft 301 towards the outside of the housing 10 in the second direction Y, the first limiting member 3041 can abut against the bushing 302 or the first reinforcing member 303 to limit the hanging shaft 301 from continuing to move towards the outside of the housing 10, thereby reducing the risk of the hanging shaft 301 disengaging from the bushing 302.

[0119] In this embodiment, the first limiting member 3041 increases the difficulty for the hanging shaft 301 to detach from the bushing 302, thereby improving the structural stability of the energy storage device 100.

[0120] In some embodiments, please continue to refer to Figure 11 The limiting member 304 may include a second limiting member 3042, which is disposed on the side of the lifting shaft 301 facing the outside of the housing 10. The second limiting member 3042 is configured to limit the retraction length of the lifting shaft 301 into the housing 10 and retracting the bushing 302.

[0121] The second limiting member 3042 is located on the side of the first side beam 1 facing the outside of the housing 10. The second limiting member 3042 is connected to the lifting shaft 301. During the movement of the lifting shaft 301 into the housing 10 along the second direction Y, the second limiting member 3042 can abut against the bushing 302 or the first side beam 1 to limit the lifting shaft 301 from continuing to move into the housing 10, thereby reducing the risk of the lifting shaft 301 completely retracting into the bushing 302.

[0122] In this embodiment, the second limiting member 3042 reduces the difficulty of fully inserting the hanging shaft 301 into the bushing 302 without making it easy to extend it out of the bushing 302, thus reducing the difficulty of using the hanging shaft 301.

[0123] In some embodiments, please continue to refer to Figure 11 The lifting shaft 301 is provided with a first limiting member 3041 and a second limiting member 3042. Along the second direction Y, the bushing 302 is located between the first limiting member 3041 and the second limiting member 3042. The first limiting member 3041 and the second limiting member 3042 are used to limit the range of movement of the lifting shaft 301.

[0124] The lifting shaft 301 passes through the bushing 302, with both ends of the lifting shaft 301 extending out of the bushing 302. The two portions of the lifting shaft 301 extending out of the bushing 302 are respectively provided with a first limiting member 3041 and a second limiting member 3042. The first limiting member 3041 and the second limiting member 3042 can respectively restrict the lifting shaft 301 from passing through the lifting shaft 301 in the direction from the first limiting member 3041 to the second limiting member 3042 and restrict the lifting shaft 301 from passing through the lifting shaft 301 in the direction from the second limiting member 3042 to the first limiting member 3041.

[0125] The lifting shaft 301, the first limiting member 3041, and the second limiting member 3042 can be integrally formed or separately configured and connected. In embodiments where the lifting shaft 301, the first limiting member 3041, and the second limiting member 3042 are separately configured, the first limiting member 3041 and the second limiting member 3042 can be welded, inserted, pinned, or fastened to the lifting shaft 301, and the fastener can be a bolt.

[0126] In this embodiment, by setting the bushing 302 between the first limiting member 3041 and the second limiting member 3042, the difficulty of lifting the shaft 301 away from the bushing 302 and the difficulty of the shaft 301 being fully inserted into the bushing 302 and not being convenient to extend for use are increased, thereby improving the structural stability of the energy storage device 100.

[0127] In some embodiments, please refer to Figure 12 , Figure 12 This is an assembly diagram of the lifting assembly 30, the blocking member 305, and the first side beam 1 provided in some embodiments of this application. The lifting assembly 30 also includes the blocking member 305, which is movably disposed on the first side beam 1 and located outside the housing 10. The blocking member 305 has a first position and a second position. The blocking member 305 is configured to: in the first position, restrict the lifting shaft 301 from extending the bushing 302 outside the housing 10, and in the second position, allow the lifting shaft 301 to extend the bushing 302 outside the housing 10.

[0128] The blocking member 305 can move, rotate, or swing on the first side beam 1 to switch between a first position and a second position. In the first position, the blocking member 305 can directly contact the lifting shaft 301 to restrict the lifting shaft 301 from extending beyond the bushing 302 of the housing 10; alternatively, the blocking member 305 can contact the lifting shaft 301 through an intermediate member connected to it to restrict the lifting shaft 301 from extending beyond the bushing 302 of the housing 10. In embodiments where the lifting shaft 301 is provided with a first limiting member 3041 and a second limiting member 3042, the intermediate member can be either the first limiting member 3041 or the second limiting member 3042.

[0129] The blocking member 305 in the first position can prevent the lifting shaft 301 from extending outside the housing 10. When the blocking member 305 is disengaged from the first position, the lifting shaft 301 can extend outside the housing 10, and the lifting shaft 301 extending outside the housing 10 can prevent the blocking member 305 from switching to the first position.

[0130] In this embodiment, when the blocking member 305 is in the first position, the blocking member 305 can restrict the hanging shaft 301 from extending out of the bushing 302, thereby reducing the transportation difficulty of the energy storage device 100.

[0131] In some embodiments, please continue to refer to Figure 12The blocking member 305 is oscillatingly disposed on the first side beam 1, and the blocking member 305 can oscillate between a first position and a second position.

[0132] For example, such as Figure 12 As shown, the blocking member 305 is hinged to the first side beam 1, and the blocking member 305 can swing on the first side beam 1 to switch between a first position and a second position.

[0133] In this embodiment, by swayably setting the blocking member 305 on the outside of the first side beam 1, the difficulty of switching the blocking member 305 between the first position and the second position is reduced, which facilitates the use of the hanging shaft 301.

[0134] In some embodiments, the first side beam 1 is located at the bottom of the box body 10.

[0135] The first side beam 1 is located at the bottom of the box body 10. The first side beam 1 can be a horizontal beam extending along the length direction of the box body 10 or a longitudinal beam extending along the width direction of the box body 10.

[0136] In this embodiment, the first side beam 1 is located at the bottom of the housing 10. The first side beam 1, which has high strength, can also support the battery device 20, thereby improving the structural stability of the energy storage device 100.

[0137] In some embodiments, the first direction X is parallel to the length direction of the housing 10.

[0138] The first side beam 1 extends along the length of the box body 10.

[0139] In this embodiment, the first side beam 1 is located on one side of the box body 10 along the width direction, which helps to reduce the difficulty of hoisting the energy storage device 100.

[0140] In some embodiments, the first side beam 1 is provided with a plurality of lifting assemblies 30, which are spaced apart along a first direction X.

[0141] In an embodiment where there is one first side beam 1, the first side beam 1 is provided with a plurality of lifting assemblies 30 spaced apart along a first direction X. In an embodiment where there are multiple first side beams 1, each first side beam 1 is provided with a plurality of lifting assemblies 30 spaced apart along a first direction X.

[0142] In this embodiment, by setting multiple hoisting components 30 at intervals along the first direction X, the stress on a single hoisting component 30 is reduced, making the energy storage device 100 more uniformly subjected to stress during hoisting and reducing the hoisting difficulty of the energy storage device 100.

[0143] In some embodiments, the housing 10 includes two first side beams 1, which are spaced apart along a second direction Y, and each first side beam 1 is provided with at least one hoisting assembly 30.

[0144] Each first side beam 1 may be provided with multiple lifting components 30; each first side beam 1 may be provided with only one lifting component 30; or one first side beam 1 may be provided with one lifting component 30, while another first side beam 1 may be provided with multiple lifting components 30.

[0145] In this embodiment, the spacing between the two first side beams 1 is small, which helps to reduce the pulling force required to hoist the energy storage device 100 and reduces the hoisting difficulty of the energy storage device 100.

[0146] In some embodiments, please refer to Figure 13 , Figure 13 This is a partial structural schematic diagram of an energy storage device 100 provided in some embodiments of this application. Along the height direction Z of the housing 10, at least one side of the first side beam 1 is connected to a second reinforcing member 16. In a projection plane perpendicular to the height direction Z, at least a portion of the orthographic projection of the second reinforcing member 16 is located within the orthographic projection of the bushing 302.

[0147] The second reinforcing member 16 may be provided on only one side of the first side beam 1 along the height direction Z; or the second reinforcing member 16 may be provided on both sides of the first side beam 1 along the height direction Z. The second reinforcing member 16 may be welded, bonded, snapped, pinned, or fastened to the first side beam 1; wherein, the fastener may be a bolt.

[0148] In this embodiment, the second reinforcing member 16 can enhance the strength of the position where the first side beam 1 is mounted on the bushing 302, reducing the risk of damage to the first side beam 1.

[0149] In some embodiments, please refer to Figure 13 and Figure 14 , Figure 14 This is a partial structural schematic diagram of an energy storage device 100 provided in some other embodiments of this application. The housing 10 includes a support beam 2 and two first side beams 1, which are spaced apart along a second direction Y. The support beam 2 is located between the two first side beams 1 and is connected to at least one support beam 2. The support beam 2 is configured to support the first side beams 1 along the second direction Y. Along the first direction X, the minimum distance between the support beam 2 and the bushing 302 is 10mm-350mm.

[0150] The box body 10 includes two second side beams 4, which extend along a second direction Y and are located on both sides of the box body 10 along a first direction X. Along the second direction Y, a support beam 2 is located between the two first side beams 1, and along the first direction X, the support beam 2 is located between the two second side beams 4.

[0151] Along the first direction X, the minimum distance between the support beam 2 and the bushing 302 can be any point value or a range between any two of the following: 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, and 350mm.

[0152] In this embodiment, along the first direction X, the minimum distance between the support beam 2 and the bushing 302 is greater than or equal to 10mm, which can reduce the difficulty of setting up the bushing 302 and the hanging shaft 301; the minimum distance between the support beam 2 and the bushing 302 is less than or equal to 350mm, which can enhance the strength of the position where the bushing 302 is set on the first side beam 1; therefore, the minimum distance between the support beam 2 and the bushing 302 is 10mm-350mm, which can balance reducing the difficulty of setting up the bushing 302 and the hanging shaft 301 and enhancing the strength of the position where the bushing 302 is set on the first side beam 1.

[0153] In some embodiments, please continue to refer to Figure 13 and Figure 14 The housing 10 also includes a partition 5, which is disposed along the second direction Y on the side of the lifting assembly 30 opposite to the exterior of the housing 10. The partition 5 is located between two adjacent support beams 2 and connects the two support beams 2. Foam can be installed on the side of the partition 5 opposite to the lifting assembly 30 to insulate the housing 10. The partition 5 can also limit the length of the lifting shaft 301 extending out of the bushing 302 along the direction from the second outer surface 12 to the first outer surface 11, reducing the risk that the lifting shaft 301 will be completely embedded in the bushing 302, making operation inconvenient.

[0154] In some embodiments, the minimum distance between the support beam 2 and the bushing 302 along the first direction X is 100mm-200mm.

[0155] Along the first direction X, the minimum distance between the support beam 2 and the bushing 302 can be any one of the following values ​​or a range between any two: 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 170mm, 175mm, 180mm, 185mm, 190mm, 195mm, and 200mm.

[0156] In this embodiment, along the first direction X, the minimum distance between the support beam 2 and the bushing 302 is greater than or equal to 100mm, which can further reduce the difficulty of setting up the bushing 302 and the hanging shaft 301; the minimum distance between the support beam 2 and the bushing 302 is less than or equal to 200mm, which can further enhance the strength of the position where the bushing 302 is set on the first side beam 1; therefore, the minimum distance between the support beam 2 and the bushing 302 is 100mm-200mm, which can further balance reducing the difficulty of setting up the bushing 302 and the hanging shaft 301 and enhancing the strength of the position where the bushing 302 is set on the first side beam 1.

[0157] In some embodiments, please continue to refer to Figure 14 Along the first direction X, support beams 2 are provided on both sides of the bushing 302.

[0158] Each bushing 302 may have a support beam 2 on both sides along the first direction X; or some bushings 302 may have a support beam 2 on both sides, while other bushings 302 may have a support beam 2 on one side.

[0159] In this embodiment, the bushing 302 is provided with support beams 2 on both sides along the first direction X, which can enhance the positional strength of the first side beam 1 where the bushing 302 is located and reduce the risk of deformation and damage to the first side beam 1.

[0160] In some embodiments, please refer to Figure 15 , Figure 15 The present application also provides partial structural schematic diagrams of the energy storage device 100 according to some embodiments. Along the second direction Y, the opposite ends of the support beam 2 are respectively connected to two first side beams 1.

[0161] The support beam 2 can extend along the second direction Y. One end of the support beam 2 along the second direction Y is connected to a first side beam 1, and the other end of the support beam 2 along the second direction Y is connected to another first side beam 1. The support beam 2 is welded to the two first side beams 1.

[0162] In this embodiment, the support beam 2 can enhance the strength of the two first side beams 1 and reduce the risk of deformation and damage to the two first side beams 1.

[0163] In some embodiments, please continue to refer to Figure 14 The box body 10 also includes a middle beam 3, which extends along a first direction X and a second direction Y. The middle beam 3 is located between two first side beams 1, and both first side beams 1 are connected to the middle beam 3 by at least one support beam 2.

[0164] Each first side beam 1 can be connected to the middle beam 3 by only one support beam 2, or it can be connected to the middle beam 3 by multiple support beams 2.

[0165] In this embodiment, the intermediate beam 3 helps to reduce the length of the support beam 2 and increase the strength of the support beam 2, thereby further improving the structural strength of the box 10 and the structural stability of the energy storage device 100.

[0166] This application provides an energy storage system 2000, including an energy storage converter 300 and an energy storage device 100 provided in any of the above embodiments, wherein the energy storage converter 300 is electrically connected to the energy storage device 100.

[0167] This application provides a charging network 1000, including a charging pile 200 and an energy storage device 100 provided in any of the above embodiments. The energy storage device 100 is used to provide electrical energy to the charging pile 200.

[0168] Please continue to refer to Figure 5 , Figure 6 , Figure 11 and Figure 14 This application provides an energy storage device 100, including a housing 10, a battery device 20, and a hoisting assembly 30. The housing 10 includes a first side beam 1 extending along a first direction X and a second direction Y. The first side beam 1 has a first outer surface 11 and a second outer surface 12 disposed opposite to each other. The first direction X, the second direction Y, and the height direction Z of the housing 10 are perpendicular to each other. The battery device 20 is housed within the housing 10. The hoisting assembly 30 includes a hoisting shaft 301 and a bushing 302. A bushing 302 passes through and connects to the first side beam 1. The bushing 302 includes an extension 3021 extending beyond the first outer surface 11 in a direction pointing from the second outer surface 12 to the first outer surface 11. A lifting shaft 301 is movably inserted into the bushing 302 to adjust the length of the portion of the lifting shaft 301 extending outward from the bushing 302 into the housing 10. The lifting assembly 30 also includes a first reinforcing member 303, which connects the first side beam 1 and the extension 3021. The first reinforcing member 303 includes a first connecting portion 3031 and a second connecting portion 3032. Along the second direction Y, the first connecting portion 3031 is spaced apart from the first side beam 1 and is located on the side of the first outer surface 11 opposite to the second outer surface 12. The first connecting portion 3031 is connected to the bushing 302, and the second connecting portion 3032 connects the first side beam 1 and the first connecting portion 3031. Along the height direction Z of the housing 10, each end of the first connecting portion 3031 is connected to a second connecting portion 3032, which are located on both sides of the extension portion 3021. A first reinforcing member 303 is welded to the extension portion 3021; ​​the first reinforcing member 303 is also welded to the first side beam 1. Along the second direction Y, the first outer surface 11 is the surface of the first side beam 1 that faces away from the outside of the housing 10. The first side beam 1 is located at the bottom of the housing 10.

[0169] In this energy storage device 100, by providing a first reinforcing member 303 to connect the first side beam 1 and the extension 3021, on the one hand, the first reinforcing member 303 can improve the strength of the first side beam 1 and reduce the risk of damage to the first side beam 1; on the other hand, the first reinforcing member 303 can extend the lever arm of the torsional force applied by the bushing 302 to the first side beam 1, thereby reducing the risk of torsional deformation of the first side beam 1, improving the structural strength of the first side beam 1, and thus improving the structural stability of the energy storage device 100. By providing a first connecting part 3031 spaced apart from the first side beam 1 and connected to the bushing 302, the first connecting part 3031 can be positioned away from the first side beam 1, thereby extending the lever arm of the torsional force applied by the bushing 302 to the first side beam 1 and reducing the risk of damage to the first side beam 1. The connection between the first reinforcing member 303, the extension 3021 and the first side beam 1 is more stable, which improves the positional stability of the first reinforcing member 303, the extension 3021 and the first side beam 1, thereby improving the structural stability of the energy storage device 100.

[0170] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0171] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: Battery device; A housing containing the battery device, the housing including a first side beam and a lifting assembly, the first side beam extending along a first direction, the lifting assembly including a lifting shaft and a bushing extending along a second direction, the bushing passing through and connected to the first side beam, the bushing including an extension extending beyond the first side beam along the second direction, the lifting shaft being movably inserted into the bushing along the second direction to adjust the length by which the lifting shaft extends beyond the bushing outside the housing, the first direction, the second direction and the height direction of the housing being non-coplanar and intersecting each other; The hoisting assembly further includes a first reinforcing member, which connects the first side beam and the extension.

2. The energy storage device as described in claim 1, characterized in that, The first reinforcing member includes a first connecting portion and a second connecting portion. Along the second direction, the first connecting portion is spaced apart from the first side beam, the first connecting portion is connected to the bushing, and the second connecting portion connects the first side beam and the first connecting portion.

3. The energy storage device as described in claim 2, characterized in that, The first connecting part is provided with a first through hole, and the bushing passes through the first through hole.

4. The energy storage device as described in claim 2, characterized in that, Along the height direction, the two opposite ends of the first connecting portion are each connected to a second connecting portion, and the second connecting portions connected to the opposite ends of the first connecting portion are respectively located on both sides of the extension portion.

5. The energy storage device as described in claim 1, characterized in that, The first side beam includes a first wall and a second wall arranged opposite to each other along the second direction. Both the first wall and the second wall are provided with a second through hole. The bushing passes through the second through hole, and the extension extends beyond the first wall along the direction from the second wall to the first wall.

6. The energy storage device as described in claim 5, characterized in that, Along the height direction, at least one end of the first side beam is flush with the first reinforcement.

7. The energy storage device as described in claim 5, characterized in that, Along the height direction, at least one end of the first side beam extends beyond the first reinforcement.

8. The energy storage device as described in claim 5, characterized in that, The first reinforcing member connects the first wall and the extension of the bushing.

9. The energy storage device as described in claim 5, characterized in that, Along the second direction, the second wall faces the outside of the housing.

10. The energy storage device as described in claim 1, characterized in that, The first reinforcing member is welded to the extension; and / or, the first reinforcing member is welded to the first side beam.

11. The energy storage device according to any one of claims 1-10, characterized in that, At least one end of the lifting shaft is provided with a limiting member, which is used to abut against the bushing to limit the range of movement of the lifting shaft.

12. The energy storage device according to any one of claims 1-10, characterized in that, The hoisting assembly further includes a blocking member movably disposed on the first side beam and located outside the housing. The blocking member has a first position and a second position, and is configured to: restrict the hoisting shaft from extending beyond the bushing outside the housing in the first position, and allow the hoisting shaft to extend beyond the bushing outside the housing in the second position.

13. The energy storage device as described in any one of claims 1-10, characterized in that, The first side beam is located at the bottom of the box body.

14. The energy storage device according to any one of claims 1-10, characterized in that, The first direction is parallel to the length direction of the box.

15. The energy storage device as described in any one of claims 1-10, characterized in that, The first side beam is provided with a plurality of the lifting components, which are spaced apart along the first direction.

16. The energy storage device according to any one of claims 1-10, characterized in that, The box body includes two first side beams, which are spaced apart along the second direction, and each first side beam is provided with at least one of the hoisting components.

17. The energy storage device according to any one of claims 1-10, characterized in that, Along the height direction of the box body, at least one side of the first side beam is connected to a second reinforcing member, and in a projection plane perpendicular to the height direction, at least a portion of the orthographic projection of the second reinforcing member is located within the orthographic projection of the bushing.

18. The energy storage device as described in any one of claims 1-10, characterized in that, The housing includes a support beam and two first side beams, the two first side beams being spaced apart along the second direction, the support beam being located between the two first side beams and connected to at least one first side beam, the support beam being configured to support the first side beams along the second direction, and the minimum distance between the support beam and the bushing along the first direction being 10mm-350mm.

19. The energy storage device as described in claim 18, characterized in that, Along the first direction, the support beams are provided on both sides of the bushing; And / or, along the second direction, the opposite ends of the support beam are respectively connected to the two first side beams.

20. The energy storage device as described in claim 18, characterized in that, The box body also includes a middle beam that extends along the first direction and along the second direction. The middle beam is located between two first side beams, and both first side beams are connected to the middle beam by at least one of the support beams.

21. An energy storage system, characterized in that, include: The energy storage device as described in any one of claims 1-20; An energy storage converter is electrically connected to the energy storage device.

22. A charging network, characterized in that, include: Charging stations; The energy storage device according to any one of claims 1-20, wherein the energy storage device is used to provide electrical energy to the charging pile.

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