Energy storage equipment

Abstract

The utility model relates to the technical field of batteries, and provides energy storage equipment, the energy storage equipment comprises a cabinet, a battery monomer, a hoisting piece and a connecting piece, the cabinet comprises a cabinet body and a mounting seat, and the mounting seat is arranged on the cabinet body; the battery monomers are arranged in the cabinet body and are used for storing or providing electric energy; the connecting piece penetrates through the mounting base and the hoisting piece in the first direction, and the first direction is perpendicular to the vertical direction. The connecting piece penetrates through the mounting base in the first direction, the mounting base can not be provided with a threaded hole extending in the vertical direction, the water accumulation risk can be reduced, and the service life of the connecting piece is prolonged; in the process of hoisting the energy storage equipment, the load acts on the connecting piece, the acting force generated by the load is perpendicular to the first direction, and the connecting piece is arranged along the first direction, that is, the stress direction of the connecting piece is perpendicular to the first direction, so that the bearing capacity of the connecting piece is enhanced, and the risk of failure of the connecting piece can be reduced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to an energy storage device. Background Technology

[0002] Energy storage devices have individual battery cells that can be used to store or provide electrical energy. For example, energy storage devices can be used to provide electrical energy to vehicles.

[0003] In related technologies, energy storage devices are relatively heavy. The cabinet of these devices is equipped with lifting components. The cabinet has threaded holes, and screws pass through the lifting components and engage with the threads in these holes, thus securing the lifting components to the cabinet. When lifting the energy storage device, the hook of the lifting mechanism can hook the lifting components to lift the device, thereby hoisting it into place. Energy storage devices are typically installed outdoors, and during outdoor use, water can easily accumulate in the threaded holes, causing the screws to rust. Utility Model Content

[0004] In view of this, embodiments of this application aim to provide an energy storage device that can reduce the risk of water accumulation.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] This application provides an energy storage device, including:

[0007] A server rack, comprising a cabinet body and a mounting base, wherein the mounting base is disposed on the cabinet body;

[0008] A battery cell, which is disposed inside the cabinet, is used to store or provide electrical energy;

[0009] Lifting components;

[0010] A connector is provided through the mounting base and the lifting member along a first direction, which is perpendicular to the vertical direction.

[0011] The energy storage device provided in this application embodiment has a connector that passes through the mounting base and the lifting component along a first direction, which is perpendicular to the vertical direction. On the one hand, since the connector passes through the mounting base along the first direction, the mounting base does not need to be provided with a threaded hole extending in the vertical direction, which can reduce the risk of water accumulation and improve the service life of the connector. On the other hand, during the lifting of the energy storage device, the load is applied to the connector, and the force generated by the load is perpendicular to the first direction. Since the connector is set along the first direction, that is, the force direction of the connector is perpendicular to the first direction, the load-bearing capacity of the connector is enhanced, which can reduce the risk of connector failure.

[0012] In some embodiments, the lifting member and the mounting base are rotatably connected via the connector.

[0013] In this embodiment, the lifting component can rotate relative to the mounting base, thus facilitating the adjustment of the lifting component's position.

[0014] In some embodiments, the lifting component has a stowed state and a suspended state; in the stowed state, the lifting component is stacked on the cabinet; in the suspended state, the lifting component is suspended from the cabinet.

[0015] In this embodiment, the lifting component has a stored state and a suspended state. When it is necessary to lift the energy storage device, the lifting component can be in the suspended state, with the lifting component suspended on the cabinet so that the lifting tool can hook the lifting component. When packaging or transporting the energy storage device, the lifting component can be in the stored state, with the lifting component stacked on the cabinet, which reduces the space occupied by the lifting component to a certain extent and avoids affecting the packaging and transportation of the energy storage device.

[0016] In some embodiments, the energy storage device includes a blocking member, and the connecting member includes a head, a rod, and a limiting member. The rod connects the head and the limiting member, and the rod passes through the mounting base and the lifting member in a first direction. The blocking member is connected to the limiting member, and the head and the blocking member together restrict the rod from disengaging from the mounting base and the lifting member in the first direction.

[0017] In this embodiment, the head and the blocking member together restrict the rod from disengaging from the mounting base and the lifting member in the first direction. The head and the blocking member play a limiting and stopping role, improving the connection stability of the connector, the mounting base and the lifting member.

[0018] In some embodiments, the blocking member includes a nut that is threadedly connected to the limiting portion.

[0019] In this embodiment, the nut is threadedly connected to the limiting part, which enables a detachable connection between the connector, the mounting base and the lifting part, making assembly simple and easy to operate.

[0020] In some embodiments, the blocking member includes a pin, the limiting portion forms a pin hole extending in a second direction, the pin is inserted into the pin hole, and the second direction intersects the first direction.

[0021] In this embodiment, the pin is inserted into the limiting part, which enables a detachable connection between the connector, the mounting base and the lifting part. The assembly is simple and easy to operate.

[0022] In some embodiments, the energy storage device includes a sleeve, the mounting base forms a first hole extending in a first direction, the sleeve passes through the first hole, and the connector passes through the sleeve.

[0023] In this embodiment, a sleeve is fitted between the hole wall of the first hole and the connector. The sleeve can isolate the connector from the hole wall of the first hole, avoiding direct contact between the connector and the hole wall of the first hole. This can reduce the risk of friction damage to the hole wall of the first hole caused by direct contact between the connector and the hole wall during hoisting.

[0024] In some embodiments, the cabinet includes a cover plate and a support beam, the support beam being disposed inside the cover plate, and both the support beam and the cover plate being connected to the mounting base.

[0025] In this embodiment, the support beam is located inside the cover plate to prevent it from being exposed. Both the support beam and the cover plate are connected to the mounting base. By having the support beam and the cover plate jointly bear the load transmitted by the mounting base, the risk of the cover plate being damaged by force during hoisting can be reduced.

[0026] In some embodiments, the mounting base includes a base body and a mounting body connected to the base body, the cabinet forms an assembly opening, the base body is located inside the cabinet and connected to the cabinet, at least a portion of the mounting body extends out of the assembly opening, the mounting body forms a first hole extending in a first direction, and the connector passes through the first hole.

[0027] In this embodiment, at least part of the mounting body extends out of the assembly opening so that the connector can be inserted into the first hole of the mounting body; the base is located inside the cabinet and connected to the cabinet, and the base can abut against the part of the cabinet located around the assembly opening. During the hoisting process, the part where the base is connected to the cabinet can bear the load, thereby improving the structural stability.

[0028] In some embodiments, the lifting component includes an annular body and two lifting lugs connected to the annular body. The space enclosed by the annular body is a lifting hole, and the lifting lugs form a second hole extending along a first direction. The two lifting lugs are located on both sides of the mounting body along the first direction, and the connector passes through the second hole.

[0029] In this embodiment, the connector can be inserted into the first hole and the second holes of the two lifting lugs to achieve the initial installation of the connector, the lifting component and the mounting base. The annular body is used to cooperate with the lifting device to achieve lifting. The two lifting lugs are located on both sides of the mounting body along the first direction. The connector is inserted into the second hole. During the lifting process, both lifting lugs can bear the load and play a role in balancing the force.

[0030] In some embodiments, the cabinet includes a cover plate and a support beam, the support beam includes an end plate disposed inside the cover plate, the mounting opening penetrates the cover plate and the end plate, and both the cover plate and the end plate are connected to the mounting base.

[0031] In this embodiment, both the cover plate and the end plate are connected to the mounting base. During the hoisting process, both the cover plate and the end plate can withstand the load, reducing the risk of cabinet deformation due to stress.

[0032] In some embodiments, the cabinet includes a reinforcing member, the reinforcing member including a plate, the plate being disposed on the side of the end plate away from the cover plate, the mounting opening penetrating the plate, and the plate being connected to the mounting base.

[0033] In this embodiment, the cover plate, end plate, and plate body are all connected to the mounting base. During the hoisting process, the cover plate, end plate, and plate body can all withstand the load. The reinforcing member can further improve the structural strength of the cover plate and end plate and reduce the risk of cabinet deformation under stress.

[0034] In some embodiments, the mounting base is disposed on the upper surface of the cabinet.

[0035] In this embodiment, the mounting base is disposed on the upper surface of the cabinet, and the lifting component can be located above the cabinet so that the lifting device, such as a hook, can hook the lifting component.

[0036] In some embodiments, at least two of the mounting seats are spaced apart on the upper surface of the cabinet, and each of the mounting seats is provided with a lifting component.

[0037] In this embodiment, at least two mounting bases can reduce the load borne by a single mounting base and reduce the risk of damage to a single mounting base. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of an energy storage device in one embodiment of this application;

[0039] Figure 2 for Figure 1 A schematic diagram of part of the structure of a medium-sized energy storage device;

[0040] Figure 3 for Figure 2 A schematic diagram of the partial structure from another perspective;

[0041] Figure 4 This is a schematic diagram of a portion of the cabinet structure in one embodiment of this application;

[0042] Figure 5 This is an assembly diagram of the mounting base, lifting component, connector, and blocking component in one embodiment of this application;

[0043] Figure 6 This is an assembly diagram of the lifting component, connecting component, blocking component, and sleeve in one embodiment of this application;

[0044] Figure 7 This is a schematic diagram of the structure of a single battery cell in one embodiment of this application.

[0045] Explanation of reference numerals in the attached figures

[0046] 1. Cabinet; 11. Cabinet body; 11a. Assembly port; 11b. Upper surface of cabinet body; 11c. Internal cavity; 111. Cover plate; 112. Support beam; 1121. End plate; 1122. Side plate; 1123. Base plate; 113. Reinforcing member; 1131. Plate body; 1132. Flanged edge; 12. Mounting base; 12a. First hole; 121. Base body; 122. Mounting body; 2. Lifting component; 2a. Lifting hole; 21. Ring body; 22. Lifting lug; 3. Connector; 31. Head; 32. Limiting part; 4. Blocking component; 5. Sleeve; 6. Battery cell. Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0050] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] It should be noted that in this application, "at least two" refers to a quantity of two or more. "Multiple" refers to a quantity of two or more. The unit "N" is Newton. The up-down direction is represented by X, where down refers to the direction towards the ground and up refers to the direction towards the sky, with "above" represented by X1 and "below" by X2. The primary direction is represented by Y.

[0052] In the embodiments of this application, please refer to Figure 7 Battery cell 6 can be a secondary battery. A secondary battery is a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell 6 has been discharged.

[0053] The battery cell 6 can be a lithium-ion battery cell, sodium-ion battery cell, sodium-lithium-ion battery cell, lithium metal battery cell, sodium metal battery cell, lithium-sulfur battery cell, magnesium-ion battery cell, nickel-metal hydride battery cell, nickel-cadmium battery cell, or lead-acid battery cell, etc., and the embodiments of this application are not limited to this.

[0054] A single battery cell 6 typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the single battery cell 6, 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 between them while allowing active ions to pass through.

[0055] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0056] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0057] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0058] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0059] In some embodiments, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector.

[0060] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0061] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0062] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0063] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 6. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 6 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0064] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0065] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0066] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0067] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0068] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0069] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0070] In some embodiments, the battery cell 6 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0071] Liquid electrolytes include electrolyte salts and solvents.

[0072] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0073] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0074] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell 6, such as additives that improve the overcharge / fast charge performance of the battery cell 6, additives that improve the high-temperature performance of the battery cell 6, and additives that improve the low-temperature performance of the battery cell 6.

[0075] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0076] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0077] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0078] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0079] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0080] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0081] In some embodiments, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0082] In some embodiments, the electrode assembly is a stacked structure.

[0083] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0084] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0085] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0086] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0087] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0088] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal in shape.

[0089] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0090] In some embodiments, the battery cell 6 may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0091] As an example, the battery cell 6 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0092] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0093] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0094] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell 6.

[0095] As an example, the internal pressure or temperature of the battery cell 6 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 6 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is destroyed, thereby forming an opening or flow channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 6.

[0096] The battery cell 6 provided in this application embodiment can be used in a battery device. The battery device may include one or more battery cells 6 for providing voltage and capacity. Multiple battery cells 6 can be connected in series, parallel, or a combination of these connections via a busbar. The busbar is used to establish an electrical connection between at least two battery cells 6.

[0097] For example, "hybrid connection" refers to at least two battery cells 6 that are connected in both series and parallel. At least two battery cells 6 can be directly connected in series, parallel, or hybrid connections; of course, at least two battery cells 6 can also be first connected in series, parallel, or hybrid connections to form a module, and then the module can be connected in series, parallel, or hybrid connections to form a whole.

[0098] In some embodiments, the battery device may be a battery pack, which includes a housing and at least one battery cell 6 housed within the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cell 6.

[0099] As an example, multiple battery cells 6 can be assembled into a battery module, and the battery cells 6 can be housed in the housing by fixing the battery module in the housing.

[0100] As an example, multiple battery cells 6 can also be housed in the housing by directly fixing multiple battery cells 6 to the housing.

[0101] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or not sealed.

[0102] In some embodiments, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0103] Energy storage devices 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 devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0104] Energy storage devices can be used to provide electrical power to electrical equipment, including but not limited to vehicles, ships, or spacecraft. Vehicles can include electric vehicles and electric cars, while spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0105] In some embodiments, the energy storage device can be an energy storage container or an energy storage cabinet. The energy storage cabinet can be an integrated energy storage and charging unit.

[0106] In related technologies, threaded holes are located on the upper surface of the cabinet and extend vertically. When energy storage equipment is used outdoors, in rainy or foggy weather, water can easily enter and accumulate in the threaded holes, which can easily cause the screws to rust and affect their service life. On the other hand, during the hoisting of energy storage equipment, the hook lifts the hoisting components upward, and the threaded part of the screw bears the load and the force in the vertical direction. The threaded part is prone to damage, which can lead to screw failure.

[0107] In view of this, this application provides an energy storage device, which includes a cabinet, battery cells, a hoisting component, and a connector. The cabinet includes a cabinet body and a mounting base, with the mounting base disposed in the cabinet body and the battery cells disposed within the cabinet body. The battery cells are used to store or provide electrical energy. The connector passes through the mounting base and the hoisting component along a first direction, which is perpendicular to the vertical direction.

[0108] The energy storage device provided in this application embodiment has a connector that passes through the mounting base and the lifting component along a first direction, which is perpendicular to the vertical direction. On the one hand, since the connector passes through the mounting base along the first direction, the mounting base does not need to be provided with a threaded hole extending in the vertical direction, which can reduce the risk of water accumulation and improve the service life of the connector. On the other hand, during the lifting of the energy storage device, the load is applied to the connector, and the force generated by the load is perpendicular to the first direction. Since the connector is set along the first direction, that is, the force direction of the connector is perpendicular to the first direction, the load-bearing capacity of the connector is enhanced, which can reduce the risk of connector failure.

[0109] The energy storage device provided in the embodiments of this application is further described below with reference to the accompanying drawings. Figures 1 to 7 The energy storage device includes a cabinet 1, battery cells 6, a lifting device 2, and a connector 3. The cabinet 1 includes a cabinet body 11 and a mounting base 12. The mounting base 12 is disposed in the cabinet body 11, and the battery cells 6 are disposed inside the cabinet body 11. The battery cells 6 are used to store or provide electrical energy. The connector 3 passes through the mounting base 12 and the lifting device 2 along a first direction Y, which is perpendicular to the vertical direction X.

[0110] The lifting component 2 is used to lift and install the energy storage device. For example, the lifting component 2 is used in conjunction with the lifting hook or other lifting tools of the lifting mechanism. The lifting tools lift the lifting component 2 upward to lift and install the energy storage device.

[0111] At least a portion of the lifting component 2 is located outside the cabinet 11 to facilitate the hooking of the lifting device onto the lifting component 2.

[0112] The connector 3 is inserted through the mounting base 12 and the lifting component 2 along the first direction Y. The first direction Y is perpendicular to the vertical direction X. That is to say, the connector 3 is set along the first direction Y. Taking the connector 3 as a screw or bolt as an example, the axis of the screw and bolt extends along the first direction Y.

[0113] For example, during the hoisting of the energy storage device, the lifting device lifts the hoisting component 2 upwards, and the load is applied to the connecting component 3. The connecting component 3 bears the force along the vertical direction X. The force generated by the load is perpendicular to the first direction Y. The connecting component 3 is set along the first direction Y, and the force direction of the connecting component 3 is perpendicular to the first direction Y. Taking the connecting component 3 as an example of using screws or bolts, the connecting component 3 changes from axial force in related technologies to radial force in this application, and the load-bearing capacity of the connecting component 3 is enhanced.

[0114] The energy storage device provided in this application embodiment has a connector 3 that passes through the mounting base 12 and the lifting component 2 along the first direction Y. The first direction Y is perpendicular to the vertical direction X. On the one hand, since the connector 3 passes through the mounting base 12 along the first direction Y, the mounting base 12 does not need to be provided with a threaded hole extending along the vertical direction X, which can reduce the risk of water accumulation and improve the service life of the connector 3. On the other hand, during the lifting of the energy storage device, the load is applied to the connector 3, and the force generated by the load is perpendicular to the first direction Y. Since the connector 3 is set along the first direction Y, that is, the force direction of the connector 3 is perpendicular to the first direction Y, the load-bearing capacity of the connector 3 is enhanced, which can reduce the risk of connector 3 failure.

[0115] In related technologies, in order to improve the load-bearing capacity of the threaded part, it is usually necessary to increase the diameter of the screw to increase the size of the threaded part. This will result in excessive installation torque during the screw installation process. For example, the installation torque of the screw may reach 200N to 300N, making installation and disassembly difficult and inconvenient for maintenance and replacement.

[0116] In some embodiments, the connector 3 includes screws or bolts. The connector 3 of this application is radially stressed, thus enhancing its load-bearing capacity. Because of this enhanced load-bearing capacity, it is not necessary to increase the diameter of the connector 3. In other words, compared to energy storage devices of the same weight in related technologies, the diameter of the connector 3 in this application can be relatively smaller under the same load. Therefore, the installation torque of the screws or bolts in this application can be relatively smaller, for example, less than 200N, reducing the difficulty of installation and disassembly and improving the convenience of maintenance and replacement.

[0117] In some embodiments, please refer to Figure 6 The lifting component 2 forms a lifting hole 2a, which is used to engage with a lifting device such as a hook. During the lifting of the energy storage device, the hook can engage the lifting hole 2a to lift the energy storage device, and after the lifting is completed, the hook can disengage from the lifting hole 2a to release the energy storage device.

[0118] In some embodiments, the connector 3 may be made of a metal material; for example, the connector 3 may be made of aluminum alloy or stainless steel, etc.

[0119] In some embodiments, the mounting base 12 may be made of a metal material; for example, the mounting base 12 may be made of aluminum alloy or stainless steel, etc.

[0120] In some embodiments, the lifting component 2 may be made of metal; for example, the lifting component 2 may be made of aluminum alloy or stainless steel, etc.

[0121] In some embodiments, the surface of the connector 3 may be covered with an anti-rust coating. This improves the anti-rust performance of the connector 3 and reduces the risk of it rusting in outdoor environments.

[0122] In some embodiments, the surface of the mounting base 12 may be covered with an anti-rust coating. This improves the anti-rust performance of the mounting base 12 and reduces the risk of it rusting in outdoor environments.

[0123] In some embodiments, the surface of the lifting component 2 may be covered with an anti-rust coating. This improves the rust resistance of the lifting component 2 and reduces the risk of it rusting in outdoor environments.

[0124] In some embodiments, please refer to Figure 5 The lifting component 2 and the mounting base 12 are rotatably connected by the connector 3. That is, the lifting component 2 can rotate relative to the mounting base 12, which facilitates the adjustment of the position of the lifting component 2.

[0125] In some embodiments, the lifting component 2 has a stowed state and a suspended state; in the stowed state, the lifting component 2 is stacked on the cabinet 11; in the suspended state, the lifting component 2 is suspended from the cabinet 11. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 The lifting components are in a suspended state.

[0126] "The lifting component 2 is stacked on the cabinet 11" means that the lifting component 2 is lying down on the cabinet 11. "The lifting component 2 is suspended on the cabinet 11" means that the lifting component 2 is placed upright on the cabinet 11. In other words, in the suspended state, the angle between the lifting component 2 and the surface of the cabinet 11 is α; in the stored state, the angle between the lifting component 2 and the surface of the cabinet 11 is β, where α > β.

[0127] The lifting component 2 and the mounting base 12 are rotatably connected by the connector 3. The lifting component 2 can rotate relative to the mounting base 12 to switch between the storage state and the suspended state.

[0128] In this embodiment, the lifting component 2 has a storage state and a suspended state. When it is necessary to lift the energy storage device, the lifting component 2 can be in the suspended state, and the lifting component 2 is suspended on the cabinet 11 so that the lifting tool can hook the lifting component 2. When packaging or transporting the energy storage device, the lifting component 2 can be in the storage state, and the lifting component 2 is stacked on the cabinet 11, which reduces the space occupied by the lifting component 2 to a certain extent and avoids affecting the packaging and transportation of the energy storage device.

[0129] In some embodiments, please refer to Figures 2 to 5 The energy storage device includes a blocking member 4, and a connecting member 3 includes a head 31, a rod and a limiting part 32. The rod connects the head 31 and the limiting part 32. The rod passes through the mounting base 12 and the lifting member 2 along the first direction Y. The blocking member 4 is connected to the limiting part 32. The head 31 and the blocking member 4 together restrict the rod from disengaging from the mounting base 12 and the lifting member 2 along the first direction Y.

[0130] As an example, the mounting base 12 has a first hole 12a, the lifting member 2 has a second hole, the rod passes through the first hole 12a and the second hole, and the head 31 and the blocking member 4 together restrict the rod from disengaging from the first hole 12a and the second hole in the first direction Y.

[0131] In this embodiment, the head 31 and the blocking member 4 together restrict the rod from disengaging from the mounting base 12 and the lifting member 2 along the first direction Y. The head 31 and the blocking member 4 play a limiting and stopping role, improving the connection stability of the connector 3, the mounting base 12 and the lifting member 2.

[0132] In some embodiments, please refer to Figure 5 , Figure 5 The middle blocking member 4 is a nut, and the blocking member 4 includes a nut, which is threadedly connected to the limiting part 32.

[0133] For example, during the installation of the connector 3, the lifting component 2, and the mounting base 12, the rod can pass through the mounting base 12 and the lifting component 2 along the first direction Y, and then the nut is tightened to the limiting part 32. If it is necessary to disassemble the connector 3, the nut can be loosened first to separate the nut from the limiting part 32, releasing the nut from limiting the rod, and then the rod can be pulled out along the first direction Y to disengage the connector 3 from the mounting base 12 and the lifting component 2.

[0134] In this embodiment, the nut is threadedly connected to the limiting part 32, which enables a detachable connection between the connector 3, the mounting base 12 and the lifting part 2. The assembly is simple and easy to operate.

[0135] In some embodiments, the blocking member 4 includes a pin, and the limiting portion 32 forms a pin hole extending in a second direction, the pin being inserted into the pin hole, the second direction intersecting the first direction Y.

[0136] The pin hole extending along the second direction means that the axis of the pin hole extends along the second direction.

[0137] For example, during the installation of the connector 3, the lifting component 2, and the mounting base 12, the rod can be inserted into the mounting base 12 and the lifting component 2 along the first direction Y, and then the pin can be inserted into the pin hole. If it is necessary to disassemble the connector 3, the pin can be pulled out of the pin hole first to release the pin's restriction on the rod, and then the rod can be pulled out along the first direction Y to disengage the connector 3 from the mounting base 12 and the lifting component 2.

[0138] In this embodiment, the pin is inserted into the limiting part 32, which enables a detachable connection between the connector 3, the mounting base 12 and the lifting part 2. The assembly is simple and easy to operate.

[0139] In some embodiments, please refer to Figure 5 and Figure 6 The energy storage device includes a sleeve 5, a mounting base 12 forming a first hole 12a extending along a first direction Y, the sleeve 5 passing through the first hole 12a, and the connector 3 passing through the sleeve 5.

[0140] The first hole 12a extending along the first direction Y means that the axis of the first hole 12a extends along the first direction Y. The first hole 12a can be a through hole that extends along the first direction Y.

[0141] For example, an anti-rust coating can be applied to both the surface of the mounting base 12 and the wall of the first hole 12a to improve the anti-rust performance of the mounting base 12. A sleeve 5 is fitted between the wall of the first hole 12a and the connector 3. During the hoisting process, the connector 3 contacts the sleeve 5 but not the wall of the first hole 12a, which can reduce the probability of the connector 3 contacting and rubbing against the anti-rust coating.

[0142] In this embodiment, a sleeve 5 is fitted between the hole wall of the first hole 12a and the connector 3. The sleeve 5 can isolate the connector 3 and the hole wall of the first hole 12a, avoiding direct contact between the connector 3 and the hole wall of the first hole 12a. This can reduce the risk of friction damage to the hole wall of the first hole 12a caused by direct contact between the connector 3 and the hole wall of the first hole 12a during hoisting.

[0143] In some embodiments, please refer to Figure 2 and Figure 3 The cabinet 11 includes a cover plate 111 and a support beam 112. The support beam 112 is located inside the cover plate 111. Both the support beam 112 and the cover plate 111 are connected to the mounting base 12.

[0144] In this embodiment, the support beam 112 is disposed inside the cover plate 111 to prevent the support beam 112 from being exposed. Both the support beam 112 and the cover plate 111 are connected to the mounting base 12. By having the support beam 112 and the cover plate 111 jointly bear the load transmitted by the mounting base 12, the risk of the cover plate 111 being damaged by force during hoisting can be reduced.

[0145] In some embodiments, please refer to Figures 1 to 5 The mounting base 12 includes a base body 121 and a mounting body 122 connected to the base body 121. The cabinet 11 forms an assembly opening 11a. The base body 121 is located inside the cabinet 11 and connected to the cabinet 11. At least a portion of the mounting body 122 extends out of the assembly opening 11a. The mounting body 122 forms a first hole 12a extending along the first direction Y. The connector 3 passes through the first hole 12a.

[0146] As an example, the base 121 can abut against the portion of the cabinet 11 located around the mounting opening 11a. The mounting body 122 located outside the cabinet 11 forms the first hole 12a.

[0147] In this embodiment, at least part of the mounting body 122 extends out of the assembly opening 11a so that the connector 3 can be inserted into the first hole 12a of the mounting body 122; the base 121 is located inside the cabinet 11 and connected to the cabinet 11. The base 121 can abut against the part of the cabinet 11 located around the assembly opening 11a. During the hoisting process, the part of the base 121 connected to the cabinet 11 can bear the load and improve the structural stability.

[0148] The mounting base 12 and the cabinet 11 can be detachably or non-detachably connected. For example, the mounting base 12 and the cabinet 11 can be connected by screws or bolts, etc. The mounting base 12 can also be riveted or welded to the cabinet 11. For example, the mounting body 122 can be welded to the wall of the assembly port 11a.

[0149] In some embodiments, please refer to Figures 1 to 6 The lifting component 2 includes an annular body 21 and two lifting lugs 22 connected to the annular body 21. The space enclosed by the annular body 21 is a lifting hole 2a. The lifting lugs 22 form a second hole extending along the first direction Y. The two lifting lugs 22 are located on both sides of the mounting body 122 along the first direction Y. The connector 3 passes through the second hole.

[0150] The second hole extending along the first direction Y means that the axis of the second hole extends along the first direction Y. The second hole can be a through hole that extends along the first direction Y.

[0151] The lifting hole 2a is used to cooperate with lifting tools such as hooks to achieve lifting.

[0152] In this embodiment, the connector 3 can be inserted into the first hole 12a and the second holes of the two lifting lugs 22 to achieve the initial installation of the connector 3, the lifting component 2 and the mounting base 12. The annular body 21 is used to cooperate with the lifting device to achieve lifting. The two lifting lugs 22 are located on both sides of the mounting body 122 along the first direction Y. The connector 3 is inserted into the second hole. During the lifting process, both lifting lugs 22 can bear the load and play the role of balancing the force.

[0153] The shape of the ring body 21 is not limited. For example, the ring body 21 can be a circular, elliptical, polygonal, horseshoe-shaped or irregular ring structure. Irregular shape refers to an irregular shape.

[0154] For example, the lifting component 2 can be a one-piece molded structure, such as a ring body 21 and two lifting lugs 22 formed by bending a solid metal rod. Alternatively, the lifting component 2 can be manufactured separately for the ring body 21 and the lifting lugs 22, and then welded together.

[0155] The rod can be a straight rod structure extending along the first direction Y, and the surface of the rod can be a smooth surface.

[0156] Using a plane perpendicular to the first direction Y as the projection plane, the projected area of ​​the head 31 can be larger than the projected area of ​​the rod. For example, the diameter of the head 31 can be larger than the diameter of the rod. In this way, the projected area of ​​the head 31 can be larger than the hole area of ​​the first hole 12a of the mounting base 12, and the projected area of ​​the head 31 can be larger than the hole area of ​​the second hole. The head 31 can abut against the surrounding part of the second hole, thus playing a limiting role.

[0157] For example, the mounting base 12 can be a one-piece molded structure. Alternatively, the mounting base 12 can be formed by separately manufacturing the base body 121 and the mounting body 122, and then welding them together.

[0158] In some embodiments, please refer to Figures 1 to 6 The cabinet 11 includes a cover plate 111 and a support beam 112. The support beam 112 includes an end plate 1121, which is located inside the cover plate 111. The assembly port 11a passes through the cover plate 111 and the end plate 1121. Both the cover plate 111 and the end plate 1121 are connected to the mounting base 12.

[0159] The inner side of cover plate 111 refers to the side of cover plate 111 facing the inside of cabinet 11.

[0160] As an example, both the cover plate 111 and the end plate 1121 can be welded to the mounting base 12.

[0161] In this embodiment, both the cover plate 111 and the end plate 1121 are connected to the mounting base 12. During the hoisting process, both the cover plate 111 and the end plate 1121 can withstand the load, reducing the risk of deformation of the cabinet 11 under stress.

[0162] In some embodiments, please refer to Figures 1 to 6 The cabinet 11 includes a reinforcing member 113, which includes a plate 1131. The plate 1131 is located on the side of the end plate 1121 away from the cover plate 111. The assembly port 11a passes through the plate 1131, and the plate 1131 is connected to the mounting base 12.

[0163] As an example, plate 1131 can be welded to mounting base 12.

[0164] In this embodiment, the cover plate 111, end plate 1121 and plate body 1131 are all connected to the mounting base 12. During the hoisting process, the cover plate 111, end plate 1121 and plate body 1131 can all bear the load. The reinforcing member 113 can further improve the structural strength of the cover plate 111 and end plate 1121 and reduce the risk of deformation of the cabinet body 11 under stress.

[0165] Understandably, when the cabinet 11 has a reinforcing member 113, the base 121 can abut against the portion of the plate 1131 located around the assembly port 11a. When the cabinet 11 does not have a reinforcing member 113, the base 121 can abut against the portion of the end plate 1121 located around the assembly port 11a.

[0166] In some embodiments, the support beam 112 can be a hollow tubular structure. The reinforcing member 113 can be disposed within the internal space of the support beam 112, resulting in a more compact structure.

[0167] For example, please refer to Figures 1 to 3 The support beam 112 includes an end plate 1121, two side plates 1122, and a base plate 1123. The base plate 1123 is spaced apart from the end plate 1121, and the two side plates 1122 are also spaced apart. The end plate 1121, the two side plates 1122, and the base plate 1123 together form a hollow tubular structure. In this way, the support beam 112 is lightweight yet has good structural strength.

[0168] The support beam 112 can be a one-piece molded structure. The support beam 112 has good structural strength and can also save assembly steps.

[0169] The support beam 112 can be formed by welding together the end plate 1121, the two side plates 1122, and the base plate 1123, for example, by splicing welding. The end plate 1121, the two side plates 1122, and the base plate 1123 can be manufactured separately first and then welded together, which is easy to manufacture and form.

[0170] The cabinet 11 can be roughly hexahedral in structure, including a support plate and an annular body. The annular body has an opening at both ends. The cover plate 111 and the support plate can close the openings at both ends of the annular body. The cover plate 111, the support plate, and the annular body together define a hexahedral structure with an internal cavity 11c. The internal cavity 11c of the cabinet 11 can be used to place the battery cell 6, and the support beam 112 can be located in the internal cavity 11c.

[0171] In one embodiment, please refer to Figure 2 and Figure 3The reinforcing member 113 includes two flanges 1132, which are respectively connected to the opposite ends of the plate 1131 and bent toward the same side. Both flanges 1132 can be connected to the side plates 1122 of the support beam 112 to enhance the connection stability between the reinforcing member 113 and the support beam 112.

[0172] The reinforcing member 113 can be a one-piece molded structure. The reinforcing member 113 has good structural strength and can also save assembly steps.

[0173] The reinforcing member 113 can be formed by welding a plate 1131 and two flanges 1132. The plate 1131 and the two flanges 1132 can be manufactured separately and then welded together, which is easy to manufacture and form.

[0174] In one embodiment, please refer to Figures 1 to 3 The mounting base 12 is located on the upper surface 11b of the cabinet 11.

[0175] In this embodiment, the mounting base 12 is disposed on the upper surface 11b of the cabinet 11, and the lifting component 2 can be located above the cabinet 11 X1 so that the lifting device, such as a hook, can hook the lifting component 2.

[0176] In one embodiment, please refer to Figures 1 to 3 At least two mounting bases 12 are spaced apart on the upper surface 11b of the cabinet 11, and each mounting base 12 is provided with a lifting component 2. That is to say, the number of mounting bases 12 can be the same as the number of lifting components 2, and both can be multiple.

[0177] In this embodiment, at least two mounting bases 12 can reduce the load borne by a single mounting base 12 and reduce the risk of damage to a single mounting base 12.

[0178] In one embodiment, the number of mounting bases 12 and lifting components 2 can both be three, and the three mounting bases 12 can be roughly arranged in a triangular shape.

[0179] In one embodiment, please refer to Figure 1 The number of mounting bases 12 and lifting components 2 can both be four, and the four mounting bases 12 can be roughly arranged in a quadrilateral shape, such as a square.

[0180] In one specific embodiment, please refer to Figures 1 to 7The energy storage device includes a cabinet 1, battery cells 6, lifting components 2, and connectors 3. The cabinet 1 includes a cabinet body 11 and four mounting bases 12. Four mounting bases 12 are spaced apart on the upper surface 11b of the cabinet body 11. Each mounting base 12 is equipped with a lifting component 2. Each mounting base 12 includes a seat body 121 and a mounting body 122 connected to the seat body 121. The seat body 121 is located inside and connected to the cabinet body 11. At least a portion of the mounting body 122 extends out of an assembly opening 11a. The cabinet body 11 forms the assembly opening 11a, and the mounting body 122 forms a first hole 12a extending along a first direction Y. The connector 3 passes through the first hole 12a. The lifting component 2 includes an annular body 21 and two lifting lugs 22 connected to the annular body 21. The space enclosed by the annular body 21 is a lifting hole 2a. The lifting lugs 22 form a second hole extending along the first direction Y. The two lifting lugs 22 are located on both sides of the mounting body 122 along the first direction Y. The connector 3 passes through the second hole. The cabinet 11 includes a cover plate 111, a support beam 112, and a reinforcing member 113. The support beam 112 has a hollow tubular structure, and the reinforcing member 113 is located inside the support beam 112. The support beam 112 includes an end plate 1121, which is located inside the cover plate 111. The reinforcing member 113 includes a plate 1131, which is located on the side of the end plate 1121 away from the cover plate 111. An assembly port 11a passes through the cover plate 111, the end plate 1121, and the plate 1131. The cover plate 111, the end plate 1121, and the plate 1131 are all connected to the mounting base 12. The lifting component 2 and the mounting base 12 are rotatably connected by a connector 3. The lifting component 2 has a retracted state and a suspended state. The blocking component 4 includes a nut, which is threadedly connected to the limiting part 32 of the connector 3.

[0181] In this embodiment, the connector 3 passes through the mounting base 12 and the lifting component 2 along the first direction Y. The first direction Y is perpendicular to the vertical direction X. The head 31 and the nut together restrict the rod from disengaging from the mounting base 12 and the lifting component 2 along the first direction Y. On the one hand, since the connector 3 passes through the mounting base 12 along the first direction Y, the mounting base 12 does not need to be provided with a threaded hole extending along the vertical direction X, which can reduce the risk of water accumulation and improve the service life of the connector 3. On the other hand, during the lifting of the energy storage device, the load is applied to the connector 3, and the force generated by the load is perpendicular to the first direction Y. Since the connector 3 is set along the first direction Y, that is, the force direction of the connector 3 is perpendicular to the first direction Y, the load-bearing capacity of the connector 3 is enhanced, which can reduce the risk of connector 3 failure. Compared with energy storage devices of the same weight in related technologies, under the same load, the diameter of the connector 3 in this application can be relatively small. Therefore, the installation torque of the screws or bolts in this application can be relatively small. For example, the installation torque can be less than 200N, reducing the difficulty of installation and disassembly and improving the convenience of maintenance and replacement. When hoisting energy storage equipment, the hoisting component 2 can be suspended, resting on the cabinet 11 for easy hooking by the lifting device. When packaging or transporting energy storage equipment, the hoisting component 2 can be stowed, stacked on the cabinet 11, reducing the space occupied by it and avoiding interference with packaging and transportation. The cover plate 111, end plate 1121, and plate body 1131 are all connected to the mounting base 12. During hoisting, all three components can withstand the load. The reinforcing member 113 further enhances the structural strength of the cover plate 111 and end plate 1121, reducing the risk of deformation of the cabinet 11 under stress.

[0182] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a cabinet, comprising a cabinet body and a mounting seat, the mounting seat being arranged on the cabinet body, the mounting seat forming a first hole extending in a first direction; a battery cell arranged in the cabinet body, the battery cell being used for storing or providing electric energy; a lifting piece; a connecting piece, the connecting piece being arranged in the mounting seat and the lifting piece in the first direction, the connecting piece being arranged in the first hole, the first direction being perpendicular to the up-down direction.

2. The energy storage device of claim 1, wherein, The lifting piece and the mounting seat are rotationally connected through the connecting piece.

3. The energy storage device of claim 2, wherein, The lifting piece has a storage state and a suspension state; in the storage state, the lifting piece is stacked on the cabinet body; in the suspension state, the lifting piece is suspended on the cabinet body.

4. The energy storage device of claim 1, wherein, The energy storage device comprises a blocking piece, the connecting piece comprises a head, a rod and a limiting part, the rod connecting the head and the limiting part, the rod being arranged in the mounting seat and the lifting piece in the first direction, the blocking piece being connected with the limiting part, the head and the blocking piece jointly limiting the rod from being separated from the mounting seat and the lifting piece in the first direction.

5. The energy storage device of claim 4, wherein, The blocking piece comprises a nut, the nut being threadedly connected with the limiting part.

6. The energy storage device of claim 4, wherein, The blocking piece comprises a latch, the limiting part forming a pin hole extending in a second direction, the latch being arranged in the pin hole, the second direction intersecting the first direction.

7. The energy storage device according to any one of claims 1 to 6, wherein The energy storage device comprises a sleeve, the sleeve being arranged in the first hole, the connecting piece being arranged in the sleeve.

8. The energy storage device according to any one of claims 1 to 6, wherein The cabinet body comprises a cover plate and a support beam, the support beam being arranged on the inner side of the cover plate, the support beam and the cover plate being connected with the mounting seat.

9. The energy storage device according to any one of claims 1 to 6, wherein The mounting seat comprises a seat body and a mounting body connected with the seat body, the cabinet body forming an assembly opening, the seat body being located in the cabinet body and connected with the cabinet body, at least part of the mounting body extending out of the assembly opening, the mounting body forming a first hole extending in the first direction.

10. The energy storage device of claim 9, wherein, The lifting piece comprises a ring body and two lifting lugs connected with the ring body, the space surrounded by the ring body being a lifting hole, the lifting lugs forming a second hole extending in the first direction, the two lifting lugs being located on the two sides of the mounting body in the first direction, the connecting piece being arranged in the second hole.

11. The energy storage device of claim 9, wherein, The cabinet body comprises a cover plate and a support beam, the support beam comprising an end plate, the end plate being arranged on the inner side of the cover plate, the assembly opening penetrating through the cover plate and the end plate, the cover plate and the end plate being connected with the mounting seat.

12. The energy storage device of claim 11, wherein, The cabinet body comprises a reinforcing piece, the reinforcing piece comprising a plate body, the plate body being arranged on the side of the end plate away from the cover plate, the assembly opening penetrating through the plate body, the plate body being connected with the mounting seat.

13. The energy storage device according to any one of claims 1 to 6, wherein The mounting seat is arranged on the upper surface of the cabinet body.

14. The energy storage device of claim 13, wherein, At least two mounting seats are distributed on the upper surface of the cabinet body, each mounting seat being provided with a lifting piece.

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