Energy storage container, energy storage device and power supply system

Abstract

The application discloses an energy storage container, an energy storage device and a power supply system, and relates to the technical field of energy storage. The energy storage container comprises a box frame and a plurality of box plates fixed on the box frame; at least one of the box plates comprises a first layer plate and a second layer plate arranged in layers, the first layer plate is a corrugated plate, the second layer plate has a support portion facing the first layer plate, and the support portion abuts against the first layer plate. In the application, the structure of at least one of the box plates is adjusted, so that the at least one box plate is a double-layer plate structure, thereby ensuring the structural strength of the at least one box plate on the basis that the first layer plate is a corrugated plate, and combining the double-layer plate structure, the reliability of the support of the at least one box plate on the box frame is ensured, so as to ensure the structure of the energy storage container, that is, the load-bearing reliability of the energy storage container.

Description

Technical Field

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

[0002] Energy storage systems mainly consist of energy storage devices composed of energy storage containers and energy storage units, enabling the storage and release of electrical energy within the system. Energy storage containers typically include a frame and panels (such as back panels, side panels, and top panels) fixed to the frame. However, as the demand for electrical capacity continues to increase, the volume and number of energy storage units within the containers are also increasing, undoubtedly placing higher demands on the load-bearing capacity of the containers. Utility Model Content

[0003] A primary objective of this application is to provide an energy storage container, energy storage device, and power supply system with improved structural stability.

[0004] To achieve the above-mentioned objectives, this application adopts the following technical solution: According to one aspect of this application, an energy storage container is provided, comprising: a container frame and a plurality of container panels fixed to the container frame; at least one of the container panels includes a first layer and a second layer stacked thereon, the first layer being a corrugated plate, and the second layer having a support portion facing toward the first layer, and the support portion abutting against the first layer.

[0005] In this embodiment, by adjusting the structure of at least one box panel, the at least one box panel is made into a double-layered structure. Based on the first layer of corrugated board, the double-layered structure ensures the structural strength of the at least one box panel, thereby ensuring the reliability of the at least one box panel in supporting the container frame, so as to ensure the structure of the energy storage container, that is, to ensure the load-bearing reliability of the energy storage container.

[0006] According to one embodiment of this application, the second layer plate has a bending structure that bends toward the first layer plate, and the bending structure forms the support portion.

[0007] In this embodiment, the support portion is formed by the bending structure on the second layer plate, which facilitates the reduction of the number of structural components during the assembly of the box panel, thereby improving the assembly efficiency of the box panel.

[0008] According to one embodiment of this application, the second layer includes a plurality of first splicing plates, the plurality of first splicing plates are fixedly connected, and at least two of the edges of the first splicing plates have the bending structure that bends toward the first layer.

[0009] In this embodiment, the second layer is formed by welding and fixing multiple first splicing plates, which helps to reduce the deformation of the first splicing plates in the thickness direction during welding and fixing, thereby ensuring the flatness of the second layer after splicing.

[0010] According to one embodiment of this application, the edge of the first splicing plate further has a first flange that bends toward the first layer plate, and the first flanges on two adjacent first splicing plates are fitted together with the bending structure, or the first flanges on two adjacent first splicing plates are fitted together.

[0011] In this embodiment of the application, the contact area between two adjacent first splicing plates can be increased based on the first flange of the first splicing plate, thereby improving the stability of fixing the two adjacent first splicing plates.

[0012] According to one embodiment of this application, the second layer plate includes a support beam and a body plate, wherein the support beam is fixedly connected to the body plate and constitutes the support portion.

[0013] In this embodiment, a support portion that abuts against the first layer plate can be formed by a separately provided support beam. Based on the structural stability of the support beam, the reliability of the abutment between the first layer plate and the main body plate is ensured, thereby ensuring the structural strength of the box plate.

[0014] According to one embodiment of this application, the body plate includes a plurality of second splicing plates, a support beam is provided between two adjacent second splicing plates, and the support beam is fixedly connected to two adjacent second splicing plates.

[0015] In this embodiment, the main body plate is formed by welding and fixing multiple second splicing plates, which helps to reduce the deformation of the second splicing plates in the thickness direction during welding and fixing, thereby ensuring the flatness of the main body plate after splicing.

[0016] According to one embodiment of this application, the edge of the second splicing plate has a second flange that bends toward the first layer plate, and the second flange is fitted to the side wall of an adjacent support beam.

[0017] In this embodiment of the application, by attaching the second flange to the upper side wall of the support beam, the contact area between the second splicing plate and the adjacent support beam can be increased, thereby improving the stability of the fixation between the second splicing plate and the adjacent support beam.

[0018] According to one embodiment of this application, the box frame includes a top frame and a bottom frame, and a plurality of corner posts connecting the top frame and the bottom frame. The plurality of box panels include a first box panel and a second box panel that are perpendicular to each other, and the first box panel and the second box panel are arranged adjacent to the same corner post. The box frame also includes a connecting plate, which is a bent plate and includes a first flat plate portion and a second flat plate portion that are perpendicular to each other. The corner post has a first sidewall and a second sidewall that are perpendicular to each other and respectively facing the direction of the first box panel and the direction of the second box panel. The first flat plate portion and the second flat plate portion are respectively attached to and fixedly connected to the first sidewall and the second sidewall. The first flat plate portion and the second flat plate portion are also respectively fixedly connected to the second layer plate included in the first box panel and the second box panel.

[0019] According to one embodiment of this application, the edges of the first flat plate and the second flat plate that are parallel to and far apart from each other in the height direction of the energy storage container each have a third flange that bends away from the corner post. The two third flanges overlap and are fixedly connected to the first layer of the first box plate and the second box plate, respectively.

[0020] In this embodiment, the edges of the first plate portion and the second plate portion are provided with a third flange, thereby increasing the contact area between the third flange and the first plate portion by overlapping the edge of the first plate portion with the first plate portion, compared to the contact between the edge of the first plate portion and the first plate portion, thus ensuring the stability of the fixed connection between the connecting plate and the first plate portion.

[0021] According to one embodiment of this application, the connecting plate has a right-angled bend connecting the first flat plate portion and the second flat plate portion, the inner angle side of the right-angled bend facing the inner cavity of the box frame.

[0022] In this embodiment, the right-angled bent plate on the connecting plate can be used to form a clearance space facing the inner cavity of the box frame, thereby increasing the inner cavity volume of the box frame and facilitating the improvement of the space utilization rate of the inner cavity of the box frame.

[0023] According to one embodiment of this application, the top frame includes corner connectors, a first side beam, and a second side beam. The ends of the first side beam, the second side beam, and the corner post are all fixedly connected to the corner connectors. The plurality of box panels also include a third box panel fixedly connected to a pair of the first side beams. The box frame also includes a fixing plate, which includes a first fixing part and a second fixing part. The first fixing part overlaps and is fixed to the side wall of the second side beam, and the second fixing part is fixedly connected to the third box panel.

[0024] In this embodiment, based on the fixed connection between the third box panel and a pair of first side beams, the fixed plate can be used to avoid the diagonal joints while ensuring the fixed connection between the third box panel and the second side beam, thereby ensuring the stability of the third box panel fixed on the top frame.

[0025] According to one embodiment of this application, the fixing plate further includes an inclined panel connected between the first fixing part and the second fixing part, wherein the edge of the inclined panel connected to the second fixing part is inclined toward the bottom frame.

[0026] In this embodiment, a first limiting angle can be formed at the connection between the first fixing part and the inclined panel, and a second limiting angle can be formed at the connection between the second fixing part and the inclined panel, based on the inclined panel included in the fixing plate. Thus, the fixing plate can be positioned and assembled based on the abutting fit between the first limiting angle and the edge of the second side beam, and the first layer plate can be positioned and assembled based on the abutting fit between the first layer plate and the second limiting angle (the first layer plate is located on the side of the second fixing part away from the bottom frame), thereby improving the assembly efficiency of the third box plate.

[0027] According to one embodiment of this application, the box frame further includes a reinforcing plate, the reinforcing plate having an avoidance notch and forming an L-shaped notch edge; the reinforcing plate is attached to the fixing plate, and the notch edge abuts against two mutually perpendicular side walls on the corner joint, and the reinforcing plate is fixedly connected to the first fixing part and the first side beam respectively.

[0028] In this embodiment, the reinforcement plate can improve the structural strength of the container frame at the corner joints, thereby preventing structural deformation at the corner joints when hoisting the energy storage container and ensuring the load-bearing capacity of the energy storage container.

[0029] According to one aspect of this application, an energy storage device is provided, comprising: the energy storage container described in the above aspect; and a plurality of energy storage units assembled inside the energy storage container.

[0030] According to one aspect of this application, a power supply system is provided, the power supply system including electrical equipment and the energy storage device described in the above aspect, the energy storage device supplying power to the electrical equipment.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0032] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of an energy storage system according to an exemplary embodiment.

[0034] Figure 2 This is a front view structural schematic diagram of an energy storage device according to an exemplary embodiment.

[0035] Figure 3 This is a schematic diagram of the axonometric structure of an energy storage container according to an exemplary embodiment.

[0036] Figure 4 This is a schematic diagram of the structure of an inner frame according to an exemplary embodiment.

[0037] Figure 5 This is a schematic diagram of the axially exploded structure of an energy storage container according to an exemplary embodiment.

[0038] Figure 6 yes Figure 5 The diagram shows an enlarged view of the energy storage container in area B1.

[0039] Figure 7 yes Figure 5 The diagram shows an enlarged view of the energy storage container in area B2.

[0040] Figure 8 yes Figure 5 The diagram shows an enlarged view of the energy storage container in area B3.

[0041] Figure 9 This is a front view structural schematic diagram of an energy storage container according to an exemplary embodiment.

[0042] Figure 10 yes Figure 9 The diagram shows a cross-sectional structure of the energy storage container along section AA.

[0043] Figure 11 yes Figure 10 The diagram shows a partially enlarged structural schematic of the energy storage container.

[0044] Figure 12 This is a schematic diagram of the axially exploded structure of another energy storage container according to an exemplary embodiment.

[0045] Figure 13 yes Figure 12 The diagram shows an enlarged view of the energy storage container in a local area.

[0046] Figure 14 This is a schematic diagram of a power supply system according to an exemplary embodiment.

[0047] The reference numerals in the attached figures are explained as follows: 1000. Energy storage system; 100. Energy storage device; 200. First power conversion device; 300. Second power conversion device; 400. High-voltage cable; 500. Power supply system; 510. Electrical equipment; 10. Energy storage container; 20. Energy storage unit; 30. Container frame; 40. Container panel; 31. Outer frame; 32. Inner frame; 33. Connecting plate; 34. Fixing plate; 35. Reinforcing plate; 311. Base frame; 312. Top frame; 313. Corner posts; 3121, First side beam; 3122, Second side beam; 3123, Corner joint; 3131, First sidewall; 3132, Second sidewall; 321. Connecting vertical beams; 322. Connecting horizontal beams; 323. Connecting diagonal beams; 331. First flat plate section; 332. Second flat plate section; 333. Third flange; 334. Right-angle curved plate; 341. First fixing part; 342. Second fixing part; 343. Slanted panel; 351. Avoid the gap; 41. First layer; 42. Second layer; 43. Support; 44. First box panel; 45. Second box panel; 46. Third box panel; 421. First splicing plate; 422. Bending structure; 423. First flange; 424. Body plate; 425. Support beam; 426. Second splicing plate; 427. Second flange. Detailed Implementation

[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0049] Because the energy people need is highly time- and space-dependent, in order to make rational use of energy and improve energy efficiency, it is necessary to use a medium or device to store one form of energy in the same way or by converting it into another form of energy, and then release it in a specific form of energy based on future application needs.

[0050] Currently, the generation of green electricity generally relies on solar, wind, and hydropower. However, wind and solar power are generally characterized by strong intermittency and large fluctuations, which can cause grid instability, insufficient power during peak demand periods, and excessive power during off-peak periods. Unstable voltage can also damage the power grid. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar curtailment." Solving these problems requires energy storage. This involves converting electrical energy into other forms of energy through physical or chemical means and storing it. When needed, this energy can be converted back into electrical energy and released. Simply put, energy storage is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing the stored electricity when needed.

[0051] Taking electrochemical energy storage as an example, this solution provides an energy storage device for use in energy storage systems. The energy storage device is equipped with a set of chemical batteries, which mainly use the chemical elements in the chemical batteries as energy storage media. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage media. Simply put, the electrical energy generated by wind and solar energy is stored in the chemical batteries. When the use of external electrical energy reaches its peak, the stored electricity is released for use, or transferred to places with a shortage of electricity for use.

[0052] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, and consumption-side energy storage. The corresponding types of energy storage devices include: (1) Large-scale energy storage power stations (including prefabricated energy storage modules) applied to wind power and photovoltaic power stations can help renewable energy power generation meet grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power regulation power source on the power supply side, energy storage power stations can achieve load matching of power in time and space, enhance the absorption capacity of renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy power generation, and are of great significance in power grid system backup, alleviating peak load power supply pressure and peak regulation and frequency regulation. (2) The energy storage prefabricated cabin applied on the grid side mainly functions as peak regulation, frequency regulation and grid congestion relief. In terms of peak regulation, it can realize peak shaving and valley filling of electricity load, that is, charging the energy storage device when the electricity load is low and releasing the stored electricity during the peak period of electricity load, thereby achieving a balance between power production and consumption. (3) Small energy storage cabinets applied to the electricity consumption side mainly function as self-consumption of electricity, peak-valley price arbitrage, capacity cost management, and improvement of power supply reliability. Depending on the application scenario, electricity consumption side energy storage can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the electricity market implementing peak-valley pricing, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley price arbitrage can be achieved, reducing electricity costs. In addition, industrial enterprises subject to two-part tariffs can use energy storage systems to store energy during off-peak hours and discharge during peak loads, thereby reducing peak power and the maximum demand declared, achieving the goal of reducing capacity charges. Household photovoltaics with energy storage can improve the level of self-consumption of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installations is driven. Given that photovoltaic power generation occurs during the day, while user load is generally higher at night, configuring energy storage can better utilize photovoltaic power, improve self-consumption levels, and reduce electricity costs. Furthermore, energy storage is needed in areas such as communication base stations and data centers for backup power.

[0053] Figure 1 This is a schematic diagram of the structure of an energy storage system 1000 provided in this application. The energy storage system 1000 is illustrated using a shared energy storage scenario on the generation / distribution side as an example. Of course, the energy storage device 100 of this application is not limited to the shared energy storage scenario on the generation / distribution side.

[0054] like Figure 1 As shown, the energy storage system 1000 includes: an energy storage device 100, a first power conversion device 200, a second power conversion device 300, and a high-voltage cable 400.

[0055] In some embodiments of the power generation scenario, the first power conversion device 200 can be a wind power conversion device. Since the electricity generated by wind power conversion is volatile, random, and intermittent, the unstable electricity output by the wind power conversion device can be stored in an energy storage device 100 via grid connection. The energy storage device 100 is connected to the high-voltage cable 400 and outputs smooth electricity to the power consumption side, achieving peak shaving and frequency regulation, and ensuring stable grid operation. Alternatively, the wind power conversion device is always connected to the high-voltage cable 400, and under normal power generation conditions, the high-voltage cable 400... The electricity output from the wind power conversion device is supplied to the power consumption side. When the current power load is low and the wind power conversion device generates excess electricity, the excess electricity is first stored in the energy storage device 100 to improve the problem of new energy power generation and consumption. When the power load is high, the power grid issues an instruction to transmit the electricity stored in the energy storage device 100 together with the high-voltage cable 400 in grid-connected mode to supply the power consumption side. This provides the power grid with various services such as peak shaving, frequency regulation, and backup, giving full play to the peak shaving role of the power grid, promoting peak shaving and valley filling, and alleviating the power supply pressure of the power grid.

[0056] In some embodiments on the distribution network side, the second power conversion device 300 can be a photovoltaic power conversion device. The energy storage device 100 is connected to the photovoltaic power conversion device and installed downstream of the high-voltage cable 400 between the user load and the photovoltaic power conversion device. The electrical energy output by the photovoltaic power conversion device is stored in the energy storage device 100, which can respond in a timely manner to act as a backup power source when the power grid / distribution network fails. Alternatively, it can provide power supply support to alleviate line congestion when the high-voltage cable 400 transmission line is blocked, and to delay the economic pressure caused by the expansion of the power grid / distribution capacity during power grid planning and expansion.

[0057] Optionally, the first power conversion device 200 may include, but is not limited to, a wind power conversion device, and the second power conversion device 300 may include, but is not limited to, a photovoltaic panel. The first power conversion device 200 and the second power conversion device 300 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electrical energy.

[0058] Optionally, the energy storage device 100 can be used in, but is not limited to, energy storage power stations, hydropower / thermal / wind power generation systems, solar power generation systems, mobile power systems, smart home systems, or temporary power supply systems 500, and is also applied in multiple fields such as data centers, military equipment, aerospace, charging piles, and electric vehicles.

[0059] Optionally, the energy storage device 100 may include, but is not limited to, a battery integrated system consisting of energy storage cabinets, energy storage boxes, and energy storage prefabricated compartments composed of energy storage units 20. Figure 2(The energy storage device 100 is shown as an energy storage prefabricated compartment composed of energy storage units 20). The actual application form of the energy storage device 100 provided in this application embodiment can be, but is not limited to, the listed products, and can also be other application forms. This application embodiment does not strictly limit the application form of the energy storage device 100.

[0060] Optionally, the energy storage unit 20 may include, but is not limited to, battery modules, battery packs, etc., composed of battery cells; the battery cells are not limited to at least one of cylindrical, prismatic, prismatic, or other shaped batteries. The battery cells can be rechargeable batteries, which are battery cells that can be reactivated by charging after discharge and continue to be used. The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and this application does not specifically limit their types.

[0061] In some implementations, such as Figure 2 As shown, the energy storage device 100 includes an energy storage container 10 and a plurality of energy storage units 20, which are assembled inside the energy storage container 10.

[0062] The energy storage container 10 has multiple partitions inside, which divide the interior of the energy storage container 10 into a battery compartment, an electrical compartment, and a cooling compartment. The electrical compartment and the cooling compartment can be located on the same side or different sides of the battery compartment in the width direction of the energy storage container 10.

[0063] Multiple energy storage units 20 can be installed in the battery compartment, and a high-voltage junction box can also be installed in the battery compartment. In addition, an uninterruptible power supply, a circuit breaker, and an energy storage converter are installed in the electrical compartment. The energy storage converter is connected between the high-voltage junction box and the circuit breaker, and the circuit breaker is used to connect to the external power grid. The high-voltage junction box and the uninterruptible power supply are both connected to the energy storage unit 20.

[0064] The cooling chamber is equipped with a liquid cooling system, which includes a cooling unit and a liquid storage tank, as well as liquid cooling pipelines connected to the energy storage unit 20. The liquid storage tank is used to store fluid, and the cooling unit is used to cool the fluid in the liquid storage tank. The cooled fluid in the liquid storage tank is circulated to the cooling plate of the energy storage unit 20 through the liquid cooling pipelines, so as to cool the energy storage unit 20 based on the cooled fluid.

[0065] In some implementations, such as Figure 2 or Figure 3 As shown, the energy storage container 10 includes an outer frame 31, and an installation position (not shown in the figure) is provided within the area enclosed by the outer frame 31 to realize the assembly of the energy storage unit 20 based on the installation position.

[0066] For example, such as Figure 2or Figure 3 As shown, the area enclosed by the outer frame 31 can be provided with multiple inner frames 32. The multiple inner frames 32 are distributed at intervals along the width direction of the energy storage container 10, and each inner frame 32 has support positions (not shown in the figure) distributed at intervals along the height direction of the energy storage container 10. In this way, the installation position of the energy storage unit 20 can be formed based on the support positions that are arranged opposite each other on two adjacent inner frames 32 and located at the same height, thereby realizing the assembly of the energy storage unit 20.

[0067] In some implementations, such as Figure 4 As shown, the inner frame 32 includes multiple connecting vertical beams 321 and multiple connecting horizontal beams 322. The multiple connecting vertical beams 321 are distributed at intervals along the depth direction of the energy storage container 10, and the multiple connecting horizontal beams 322 are distributed at intervals along the height direction of the energy storage container 10. Each connecting horizontal beam 322 is fixedly connected to the multiple connecting vertical beams 321.

[0068] The connecting beam 322 can be a square tube beam or a beam structure with an L-shaped end face, as long as it can be fixedly connected to multiple connecting vertical beams 321. Each connecting beam 322 can be fixedly connected to two, three, or all of the connecting vertical beams 321. In addition, the connecting beam 322 can also have a support surface facing the top frame 312 to form a support position for the energy storage unit 20, thereby realizing the reuse of the connecting beam 322 and simplifying the structure of the inner frame 32. Furthermore, when the connecting beam 322 has a support position, the multiple inner frames 32 include the outermost inner frame 32 in the width direction of the energy storage container 10, and all the connecting beams 322 included in the outermost inner frame 32 are fixed on one side of the connecting vertical beam 321 near the adjacent inner frame 32; except for the outermost inner frame 32, all the connecting beams 322 included in the remaining inner frames 32 are fixed on both sides of the connecting vertical beam 321 along the width direction of the energy storage container 10.

[0069] In some implementations, such as Figure 4 As shown, the inner frame 32 also includes multiple connecting inclined beams 323, each of which is fixedly connected to multiple connecting vertical beams 321.

[0070] Thus, by reinforcing the connection between the inclined beams 323 and the multiple vertical beams 321, the structural strength of the inner frame 32 is further improved. At the same time, the setting of the inclined beams 323 facilitates the structural stability of the energy storage container 10 when hoisting it.

[0071] To avoid interference with the fixed connection between the connecting crossbeam 322 and the connecting vertical beam 321, the dimension of the connecting diagonal beam 323 is smaller than or equal to the dimension of the connecting vertical beam 321 in the width direction of the energy storage container 10. Furthermore, the cross-sectional area of ​​the connecting diagonal beam 323 can be set to be greater than or equal to the cross-sectional area of ​​the connecting vertical beam 321. This ensures that the structural strength of the connecting diagonal beam 323 is greater than that of the connecting vertical beam 321. Consequently, when hoisting the energy storage container 10, since the hoisting position is located at one of the four corners of the energy storage container 10, the energy storage container 10 experiences a force that causes it to deform towards the center. At this time, based on the length direction of the connecting diagonal beam 323, the connecting diagonal beam 323 is simultaneously subjected to forces along the height direction and the depth direction of the energy storage container 10. Therefore, based on the structural strength of the connecting diagonal beam 323, complete deformation is avoided. The cross-sections of both the connecting diagonal beam 323 and the connecting vertical beam 321 are perpendicular to their own length direction.

[0072] In some implementations, such as Figure 3 As shown, the outer frame 31 includes a bottom frame 311 and a top frame 312 arranged opposite to each other, and a plurality of corner posts 313 connecting the bottom frame 311 and the top frame 312.

[0073] In accordance with the above description, the inner frame 32 is fixedly connected between the bottom frame 311 and the top frame 312. Specifically, each connecting vertical beam 321 within the inner frame 32 is fixedly connected at both ends to the bottom frame 311 and the top frame 312, thereby ensuring the structural stability of the outer frame 31 by combining multiple corner posts 313 and multiple inner frames 32. The bottom frame 311 and the top frame 312 within the outer frame 31 can have the same or different structures. The following explanation will focus on the bottom frame 311 as an example.

[0074] In some embodiments, the bottom frame 311 includes a front bottom crossbeam, a rear bottom crossbeam, and a pair of bottom longitudinal beams that form a rectangular frame, as well as a support crossbeam connected to the pair of bottom longitudinal beams within the rectangular frame.

[0075] Thus, based on the rectangular frame formed by the front bottom crossbeam, the rear bottom crossbeam, and a pair of bottom longitudinal beams, the support beams connected to the pair of bottom longitudinal beams achieve support within the area of ​​the rectangular frame, thereby improving the structural strength of the bottom frame 311 and thus improving the structural strength of the outer frame 31, ensuring the load-bearing effect of the energy storage container 10 on multiple energy storage units 20.

[0076] The length direction of the supporting beam is the same as the width direction of the energy storage container 10. Combined with the multiple inner frames 32 set above, the supporting beam can support the multiple inner frames 32, thereby ensuring the stability of the multiple inner frames 32 within the area enclosed by the outer frame 31.

[0077] In some embodiments, the bottom frame 311 also includes a plurality of supporting longitudinal beams connected between the rear bottom crossbeam and the front bottom crossbeam, and the plurality of supporting longitudinal beams are fixedly connected to the supporting crossbeams.

[0078] Thus, by setting up the supporting longitudinal beams, the structure of the bottom frame 311 is reinforced, the structural strength of the outer frame 31 is further improved, and the load-bearing effect of the energy storage container 10 on multiple energy storage units 20 is guaranteed.

[0079] In this configuration, multiple inner frames 32 are combined with multiple supporting longitudinal beams that correspond one-to-one with the multiple inner frames 32, so that each inner frame 32 is supported on the supporting crossbeam while also being supported on the corresponding supporting longitudinal beam, thereby ensuring the reliability of the bottom frame 311 in supporting the multiple inner frames 32.

[0080] In related technologies, the energy storage container 10 also includes a cabinet door, a bottom plate, and multiple box panels 40 fixed to the outer frame 31. All box panels 40 are corrugated board structures, and may include a back panel opposite the cabinet door, a top panel opposite the bottom plate (i.e., the third box panel 46 described below), and a side end panel located away from the electrical compartment (i.e., the second box panel 45 described below). However, as the demand for electrical capacity continues to increase, the volume and number of energy storage units 20 within the energy storage container 10 also increase, which undoubtedly places higher demands on the load-bearing capacity of the energy storage container 10.

[0081] This application provides an energy storage container 10, such as... Figure 5 As shown, the energy storage container 10 includes: a container frame 30 and a plurality of container panels 40 fixed on the container frame 30; at least one container panel 40 includes a first layer panel 41 and a second layer panel 42 stacked together, the first layer panel 41 is a corrugated plate (for example, the first layer panel 41 has a plurality of strip-shaped protrusions spaced apart along the width direction of the energy storage container 10), and the second layer panel 42 has a support portion 43 facing the first layer panel 41, and the support portion 43 abuts against the first layer panel 41.

[0082] In this embodiment of the application, by adjusting the structure of at least one box panel 40, the at least one box panel 40 is made into a double-layer plate structure. Based on the first layer plate 41 being a corrugated plate, the double-layer plate structure ensures the structural strength of the at least one box panel 40, thereby ensuring the reliability of the at least one box panel 40 in supporting the container frame 30, so as to ensure the structure of the energy storage container 10, that is, to ensure the load-bearing reliability of the energy storage container 10.

[0083] The cabinet frame 30 is the structure composed of the outer frame 31 and inner frame 32 mentioned above, and multiple cabinet panels 40 are fixed on the outer frame 31. In conjunction with the structure of the outer frame 31 mentioned above, the multiple cabinet panels 40 may include a top panel fixed on the top frame 312 (i.e., the third cabinet panel 46 mentioned below), a back panel fixed between the bottom frame 311 and the top frame 312 and opposite to the cabinet door (i.e., the first cabinet panel 44 mentioned below), and a side end panel fixed between the bottom frame 311 and the top frame 312 and located away from the electrical compartment (i.e., the second cabinet panel 45 mentioned below). At least one of the top panel, back panel, and side end panel may adopt the double-layer panel structure mentioned above.

[0084] Furthermore, for the aforementioned double-layer structure consisting of a first layer 41 and a second layer 42, a receiving cavity can be formed between the first layer 41 and the second layer 42 based on the abutment between the support 43 and the first layer 41. In this way, insulation material (such as insulating foam) can be placed within the receiving cavity between the first layer 41 and the second layer 42, achieving insulation design for at least one panel 40, thereby improving the insulation effect of the energy storage container 10; simultaneously, the insulating foam can form a buffer design between the first layer 41 and the second layer 42, thereby improving the impact resistance of at least one panel 40.

[0085] In some implementations, such as Figure 6 or Figure 7 As shown, the second layer plate 42 has a bending structure 422 that bends toward the first layer plate 41, and the bending structure 422 forms a support portion 43 that abuts against the first layer plate 41.

[0086] Thus, the support part 43 is formed by the bending structure 422 on the second plate 42, which makes it easier to reduce the number of structural parts during the assembly of the box plate 40, thereby improving the assembly efficiency of the box plate 40.

[0087] The second layer 42 can be a one-piece structure or a spliced ​​structure.

[0088] When the second layer plate 42 is an integral structure, the bending structure 422 can be formed on the edge of the second layer plate 42. In this case, the bending structure 422 can be a vertical plate located on the edge of the second layer plate 42 and facing the first layer plate 41, or an L-shaped bent plate located on the edge of the second layer plate 42 and facing the first layer plate 41, etc. For the bending structure 422 (support part 43) formed by the L-shaped bent plate, it is convenient to increase the contact area with the first layer plate 41, thereby improving the reliability of the contact between the first layer plate 41 and the second layer plate 42 and ensuring the structural strength of the box plate 40. Alternatively, the bending structure 422 can be formed in the non-edge area of ​​the second layer plate 42. In this case, the bending structure 422 is a U-shaped structure with the opening facing away from the first layer plate 41. For the U-shaped bending structure 422, it can not only improve the structural strength of the second layer plate 42, but also ensure the contact area with the first layer plate 41, thereby improving the reliability of the contact between the first layer plate 41 and the second layer plate 42 and ensuring the structural strength of the box plate 40.

[0089] In this case, the first layer plate 41 described above has multiple strip-shaped protrusions spaced apart along the width direction of the energy storage container 10, that is, the length direction of each protrusion is parallel to the height direction of the energy storage container 10. At this time, the bending structure 422 of the second layer plate 42 can also be a strip-shaped structure, and the length direction of the bending structure 422 intersects with the length direction of the protrusion, so as to achieve the cross arrangement of the bending structure 422 and the protrusion, thereby further ensuring the structural strength of the first layer plate 41 after the bending structure 422 abuts against the first layer plate 41, and thus ensuring the structural strength of the container plate 40.

[0090] When the second layer 42 is a spliced ​​structure, such as Figure 6 or Figure 7 As shown, the second layer plate 42 includes a plurality of first splicing plates 421, which are fixedly connected.

[0091] Thus, the second layer plate 42 is formed by welding and fixing multiple first splicing plates 421, which helps to reduce the deformation of the first splicing plates 421 in the thickness direction during welding and fixing, thereby ensuring the flatness of the second layer plate 42 after splicing.

[0092] At least two of the first splicing panels 421 have bending structures 422 that bend toward the first layer panel 41. This ensures that the spliced ​​second layer panel 42 has multiple bending structures 422, thereby forming multiple support portions 43 that abut against the first layer panel 41, ensuring the reliability of the abutment between the second layer panel 42 and the first layer panel 41, and ensuring the structural strength of the box panel 40.

[0093] The bending structure 422 formed by the edge of the first splicing plate 421 can refer to the bending structure 422 formed by the edge of the second layer plate 42 described above. For example, as... Figure 6As shown, the bend at the edge of the first splicing plate 421 is an L-shaped bend located at the edge of the first splicing plate 421 and facing the first layer plate 41. Furthermore, in conjunction with the first layer plate 41 described above, the length direction of each protrusion is parallel to the height direction of the energy storage container 10. In this case, the edge of the first splicing plate 421 parallel to the width direction of the energy storage container 10 may have a bend structure 422, so that the bend structure 422 and the protrusion are intersected. This further ensures the structural strength of the first layer plate 41 after the bend structure 422 abuts against it, thereby ensuring the structural strength of the container plate 40.

[0094] When multiple first splicing panels 421 are spliced ​​and fixed, the bending structures 422 on two adjacent first splicing panels 421 can be attached together to achieve mutual contact between the two adjacent first splicing panels 421 based on the contact of the two bending structures 422, thereby increasing the contact area between the two adjacent first splicing panels 421 and improving the stability of the fixation of the two adjacent first splicing panels 421.

[0095] Of course, it can also be like this Figure 7 As shown, the edge of the first splicing plate 421 has a first flange 423 that bends toward the first layer plate 41, so as to increase the contact area between two adjacent first splicing plates 421 based on the first flange 423 of the first splicing plate 421, thereby improving the stability of the fixation of two adjacent first splicing plates 421.

[0096] The first flange 423 on the edge of the first splicing panel 421 can be a vertical plate located on the edge of the first splicing panel 421 and facing the first layer panel 41. The first flange 423 on the first splicing panel 421 can be attached together; or it can be as follows: Figure 7 As shown, the first flange 423 on two adjacent first splicing plates 421 is fitted with the bending structure 422.

[0097] In other implementations, such as Figure 5 or Figure 8 As shown, the second layer plate 42 includes a support beam 425 and a body plate 424. The support beam 425 is fixedly connected to the body plate 424 and forms a support part 43.

[0098] Thus, a support part 43 that abuts against the first layer plate 41 can be formed by a separately provided support beam 425, thereby ensuring the reliability of the abutment between the first layer plate 41 and the main body plate 424 based on the structural stability of the support beam 425, and thus ensuring the structural strength of the box plate 40.

[0099] The main body plate 424 can be a one-piece structure or a spliced ​​structure.

[0100] When the main body plate 424 is an integral structure, the support beam 425 is located between the main body plate 424 and the first layer plate 41, and multiple support beams 425 can be provided between the main body plate 424 and the first layer plate 41 to ensure the reliability of the contact between the main body plate 424 and the first layer plate 41.

[0101] In this case, in conjunction with the first layer plate 41 mentioned above, the length direction of the protrusion is parallel to the height direction of the energy storage container 10. At this time, the length direction of the support beam 425 can be set to intersect with the length direction of the protrusion, so as to achieve the cross setting of the support beam 425 and the protrusion, thereby further ensuring the structural strength of the first layer plate 41 after the bending structure 422 abuts against the first layer plate 41, and thus ensuring the structural strength of the box plate 40.

[0102] When the body plate 424 is a spliced ​​structure, such as Figure 8 As shown, the main body plate 424 includes a plurality of second splicing plates 426, and a support beam 425 is provided between two adjacent second splicing plates 426, and the support beam 425 is fixedly connected to the two adjacent second splicing plates 426.

[0103] Thus, the body plate 424 is formed by welding and fixing multiple second splicing plates 426, which helps to reduce the deformation of the second splicing plates 426 in the thickness direction during welding and fixing, thereby ensuring the flatness of the body plate 424 after splicing.

[0104] The second splicing plate 426 can be a flat plate structure, in which case the edge of the second splicing plate 426 overlaps the side wall of the support beam 425 for fixed connection; or the edge of the second splicing plate 426 abuts against the side wall of the support beam 425 for fixed connection.

[0105] Regarding the situation where the edge of the second splicing plate 426 abuts against the side wall of the support beam 425, it can be as follows: Figure 8 As shown, the edge of the second splicing plate 426 has a second flange 427 that bends toward the first layer plate 41, and the second flange 427 is fitted to the side wall of an adjacent support beam 425.

[0106] Thus, by fitting the second flange 427 against the upper side wall of the support beam 425, the contact area between the second splicing plate 426 and the adjacent support beam 425 can be increased, thereby improving the stability of the fixation between the second splicing plate 426 and the adjacent support beam 425.

[0107] The second flange 427 on the edge of the second splicing plate 426 can be a vertical plate located on the edge of the second splicing plate 426 and facing the first layer plate 41, or an L-shaped plate located on the edge of the second splicing plate 426 and facing the first layer plate 41, etc., as long as it can increase the contact area between the second splicing plate 426 and the adjacent support beam 425. This application does not limit this aspect.

[0108] In the embodiments of this application, in conjunction with the above description, such as Figure 9 , Figure 10 As shown, the box frame 30 includes a top frame 312 and a bottom frame 311, as well as a plurality of corner posts 313 connecting the top frame 312 and the bottom frame 311. The plurality of box panels 40 include a first box panel 44 (such as the back panel mentioned above) and a second box panel 45 (such as the side end panel mentioned above) that are perpendicular to each other, and the first box panel 44 and the second box panel 45 are arranged adjacent to the same corner post 313.

[0109] The first panel 44 and the second panel 45 are both double-layered structures as described above, thereby ensuring the structural strength of the energy storage container 10 based on the double-layered structure of the first panel 44 and the second panel 45.

[0110] In some implementations, such as Figure 10 and Figure 11 As shown, the box frame 30 also includes a connecting plate 33, which is a bent plate and includes a first flat plate portion 331 and a second flat plate portion 332 arranged perpendicularly to each other. The corner post 313 has a first side wall 3131 and a second side wall 3132 that are perpendicular to each other and respectively facing the direction of the first box plate 44 and the direction of the second box plate 45. The first flat plate portion 331 and the second flat plate portion 332 are respectively attached to and fixedly connected to the first side wall 3131 and the second side wall 3132. The first flat plate portion 331 and the second flat plate portion 332 are also fixedly connected to the second layer plate 42 included in the first box plate 44 and the second box plate 45.

[0111] In this way, the first flat plate portion 331 and the second flat plate portion 332 on the connecting plate 33 can respectively achieve the fixed connection between the second layer plate 42 of the first box plate 44 and the second box plate 45 and the corner post 313. Therefore, compared with the case of setting the corner post 313 alone, the structural strength of the corner post 313 can be further increased, ensuring the structural strength of the box frame 30.

[0112] Alternatively, the edge of the second layer plate 42 may abut and be fixedly connected to the flat plate portion (first flat plate portion 331 or second flat plate portion 332) on the connecting plate 33. Or, in conjunction with the above, the edge of the second layer plate 42 may have a flange structure (first flange 423 or second flange 427) to increase the contact area between the second layer plate 42 and the flat plate portion (first flat plate portion 331 or second flat plate portion 332) on the connecting plate 33, thereby increasing the stability of the fixed connection between the second layer plate 42 and the flat plate portion on the connecting plate 33.

[0113] The connecting plate 33 can be a single-bend structure, in which case the first flat plate 331 and the second flat plate 332 are directly connected and perpendicular to each other.

[0114] Of course, such as Figure 11 As shown, the connecting plate 33 has a right-angled bent plate 334 connecting the first flat plate portion 331 and the second flat plate portion 332, with the inner corner of the right-angled bent plate 334 facing the inner cavity of the box frame 30. Thus, based on the arrangement of the right-angled bent plate 334 on the connecting plate 33, a clearance space facing the inner cavity of the box frame 30 can be formed, thereby increasing the inner cavity volume of the box frame 30 and facilitating improved space utilization of the inner cavity of the box frame 30.

[0115] The connecting plate 33 has a three-fold bending structure, and the first flat plate 331, the second flat plate 332 and the two wall panels included in the right-angle bent plate 334 are respectively perpendicularly connected to each other.

[0116] It should be noted that, in the embodiments of this application, in addition to the connecting plate 33 provided above for fixing the first box plate 44, the second box plate 45 and the corner post 313, the first box plate 44 and the second box plate 45 can also be directly fixedly connected to the corner post 313, as long as the stability of the fixation can be guaranteed.

[0117] In some implementations, such as Figure 11 As shown, the edges of the first flat plate 331 and the second flat plate 332 that are far apart from each other and parallel to the height direction of the energy storage container 10 have third flanges 333 that are bent away from the corner posts 313. The two third flanges 333 overlap and are fixedly connected to the first layer 41 included in the first box plate 44 and the second box plate 45, respectively.

[0118] Thus, by providing a third flange 333 on the edges of the first plate portion 331 and the second plate portion 332, the contact area between the third flange 333 and the first plate portion 41 is increased by overlapping the third flange 333 with the first plate portion 41 compared to the contact between the edge of the first plate 41 and the first plate or the second plate portion 332, thereby ensuring the stability of the fixed connection between the connecting plate 33 and the first plate portion 41.

[0119] In some implementations, such as Figure 5 ,or Figure 12 and Figure 13 As shown, the top frame 312 includes corner connectors 3123, a first side beam 3121 and a second side beam 3122. The ends of the first side beam 3121, the second side beam 3122 and the corner post 313 are all fixedly connected to the corner connectors 3123. The multiple box panels 40 also include a third box panel 46 (i.e. the top panel mentioned above) fixedly connected to a pair of first side beams 3121.

[0120] Of the two side beams, one of the first side beam 3121 and the second side beam 3122 is arranged along the width direction of the energy storage container 10, which is the top crossbeam of the top frame 312; the other is arranged along the depth direction of the energy storage container 10, which is the top longitudinal beam of the top frame 312. For example, as shown... Figure 5 As shown, the first side beam 3121 is the top horizontal beam of the top frame 312, the second side beam 3122 is the top longitudinal beam of the top frame 312, and the third box plate 46 is fixed on a pair of first side beams 3121 (i.e., top horizontal beams).

[0121] like Figure 5 or Figure 13 As shown, the box frame 30 also includes a fixing plate 34, which includes a first fixing part 341 and a second fixing part 342. The first fixing part 341 overlaps and is fixed to the side wall of the second side beam 3122, and the second fixing part 342 is fixedly connected to the third box plate 46.

[0122] Thus, in combination with the above, based on the fixed connection between the third box plate 46 and a pair of first side beams 3121, and based on the setting of the fixing plate 34, the diagonal connectors 3123 are avoided, ensuring the fixed connection between the third box plate 46 and the second side beams 3122, thereby ensuring the stability of the third box plate 46 fixed on the top frame 312.

[0123] The third box panel 46 can be a double-layered panel structure as described above. In order to avoid the exposure of the cavity between the first layer panel 41 and the second layer panel 42, the first layer panel 41 of the third box panel 46 can overlap and be fixed to the top side wall of the first side beam 3121. Similarly, for the fixed connection between the second fixing part 342 of the fixing plate 34 and the third box panel 46, in order to avoid the exposure of the cavity between the first layer panel 41 and the second layer panel 42, the second fixing part 342 of the fixing plate 34 can overlap and be fixedly connected to the first layer panel 41 of the third box panel 46. The second fixing part 342 can be located on the side of the first layer panel 41 closer to the bottom frame 311, or on the side of the first layer panel 41 away from the bottom frame 311.

[0124] In some implementations, such as Figure 5 or Figure 13 As shown, the fixing plate 34 also includes an inclined plate 343 connected between the first fixing part 341 and the second fixing part 342, and the edge of the inclined plate 343 connected to the second fixing part 342 is inclined towards the bottom frame 311.

[0125] Thus, based on the inclined panel 343 included in the fixing plate 34, a first limiting angle can be formed at the connection between the first fixing part 341 and the inclined panel 343, and a second limiting angle can be formed at the connection between the second fixing part 342 and the inclined panel 343. Based on the abutting fit between the first limiting angle and the edge of the second side beam 3122, the fixing plate 34 can be positioned and assembled. Based on the abutting fit between the first layer plate 41 and the second limiting angle (the first layer plate 41 is located on the side of the second fixing part 342 away from the bottom frame 311), the first layer plate 41 can be positioned and assembled, thereby improving the assembly efficiency of the third box plate 46.

[0126] In some implementations, such as Figure 5 or Figure 13 As shown, the box frame 30 also includes a reinforcing plate 35, which has an avoidance notch 351 and an L-shaped notch edge. The reinforcing plate 35 is attached to the fixing plate 34, and the notch edge abuts against two mutually perpendicular side walls on the corner joint 3123. The reinforcing plate 35 is fixedly connected to the first fixing part 341 and the first side beam 3121 respectively.

[0127] Thus, based on the setting of the reinforcing plate 35, the structural strength of the container frame 30 at the corner joint 3123 can be improved, thereby avoiding structural deformation at the corner joint 3123 when hoisting the energy storage container 10, and ensuring the load-bearing effect of the energy storage container 10.

[0128] This application also provides a power supply system 500, such as... Figure 14 As shown, the power supply system 500 includes: electrical equipment 510 and the energy storage device 100 described in the above embodiments, the energy storage device 100 being used to supply power to the electrical equipment 510.

[0129] The electrical equipment 510 is electrically connected to the energy storage device 100. Thus, in conjunction with the above description, the power supply system 500 of this application, during use, ensures the reliability of the power supply from the energy storage device 100 to the electrical equipment 510 due to the high assembly efficiency of the energy storage device 100.

[0130] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium; "fix" can be a non-detachable fixation or a detachable fixation (such as non-destructive or destructive disassembly). Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0131] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0132] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the implementation of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0133] The above are merely preferred embodiments of the implementation methods of this application and are not intended to limit the implementation methods of this application. For those skilled in the art, various modifications and variations can be made to the implementation methods of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the implementation methods of this application should be included within the protection scope of the implementation methods of this application.

Claims

1. An energy storage container, characterized in that, include: Box frame (30) and multiple box panels (40) fixed on the box frame (30); At least one of the box panels (40) includes a first layer (41) and a second layer (42) stacked together, the first layer (41) being a corrugated plate, and the second layer (42) having a support portion (43) facing the first layer (41), and the support portion (43) abutting against the first layer (41).

2. The energy storage container as described in claim 1, characterized in that, The second layer (42) has a bending structure (422) that bends toward the first layer (41), and the bending structure (422) forms the support portion (43).

3. The energy storage container as described in claim 2, characterized in that, The second layer (42) includes a plurality of first splicing plates (421), which are fixedly connected, and at least two of the first splicing plates (421) have the bending structure (422) that bends toward the first layer (41) at their edges.

4. The energy storage container as described in claim 3, characterized in that, The edge of the first splicing plate (421) also has a first flange (423) bent toward the first layer plate (41), and the first flange (423) on two adjacent first splicing plates (421) are fitted with the bending structure (422), or the first flange (423) on two adjacent first splicing plates (421) are fitted with each other.

5. The energy storage container as described in claim 1, characterized in that, The second layer plate (42) includes a support beam (425) and a body plate (424), wherein the support beam (425) is fixedly connected to the body plate (424) and constitutes the support part (43).

6. The energy storage container as described in claim 5, characterized in that, The main body plate (424) includes a plurality of second splicing plates (426), and a support beam (425) is provided between two adjacent second splicing plates (426), and the support beam (425) is fixedly connected to the two adjacent second splicing plates (426).

7. The energy storage container as described in claim 6, characterized in that, The edge of the second splicing plate (426) has a second flange (427) that bends toward the first layer plate (41), and the second flange (427) is fitted to the side wall of an adjacent support beam (425).

8. The energy storage container as described in any one of claims 1-7, characterized in that, The box frame (30) includes a top frame (312) and a bottom frame (311), and a plurality of corner posts (313) connecting the top frame (312) and the bottom frame (311). The plurality of box panels (40) include a first box panel (44) and a second box panel (45) that are perpendicular to each other, and the first box panel (44) and the second box panel (45) are arranged adjacent to the same corner post (313). The box frame (30) also includes a connecting plate (33), which is a bent plate and includes a first flat plate (331) and a second flat plate (332) arranged perpendicularly to each other. The corner post (313) has a first side wall (3131) and a second side wall (3132) arranged perpendicularly to each other and facing the first box plate (44) and the second box plate (45) respectively. The first flat plate (331) and the second flat plate (332) are respectively attached to and fixedly connected to the first side wall (3131) and the second side wall (3132). The first flat plate (331) and the second flat plate (332) are also fixedly connected to the second layer plate (42) included in the first box plate (44) and the second box plate (45) respectively.

9. The energy storage container as described in claim 8, characterized in that, The edges of the first flat plate (331) and the second flat plate (332) that are parallel to the height direction of the energy storage container (10) and far apart from each other have third flanges (333) that are bent away from the corner post (313). The two third flanges (333) overlap and are fixedly connected to the first layer plate (41) included in the first box plate (44) and the second box plate (45), respectively.

10. The energy storage container as described in claim 8, characterized in that, The connecting plate (33) has a right-angled bend (334) connecting the first flat plate (331) and the second flat plate (332), with the inner corner of the right-angled bend (334) facing the inner cavity of the box frame (30).

11. The energy storage container as described in claim 8, characterized in that, The top frame (312) includes a corner connector (3123), a first side beam (3121) and a second side beam (3122). The ends of the first side beam (3121), the second side beam (3122) and the corner post (313) are all fixedly connected to the corner connector (3123). The multiple box panels (40) also include a third box panel (46) fixedly connected to a pair of first side beams (3121). The box frame (30) also includes a fixing plate (34), which includes a first fixing part (341) and a second fixing part (342). The first fixing part (341) overlaps and is fixed on the side wall of the second side beam (3122), and the second fixing part (342) is fixedly connected to the third box plate (46).

12. The energy storage container as described in claim 11, characterized in that, The fixing plate (34) further includes an inclined panel (343) connected between the first fixing part (341) and the second fixing part (342), wherein the edge of the inclined panel (343) connected to the second fixing part (342) is inclined toward the bottom frame (311).

13. The energy storage container as described in claim 11, characterized in that, The box frame (30) also includes a reinforcing plate (35), which has an avoidance notch (351) and an L-shaped notch edge; The reinforcing plate (35) is attached to the fixing plate (34), and the edge of the notch abuts against two mutually perpendicular side walls on the corner joint (3123). The reinforcing plate (35) is fixedly connected to the first fixing part (341) and the first side beam (3121) respectively.

14. An energy storage device, characterized in that, include: The energy storage container (10) according to any one of claims 1-13; Multiple energy storage units (20) are assembled inside the energy storage container (10).

15. A power supply system, characterized in that, The power supply system (500) includes electrical equipment (510) and the energy storage device (100) as described in claim 14, wherein the energy storage device (100) supplies power to the electrical equipment (510).

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