Energy storage device, energy storage system and charging network

Abstract

The application provides an energy storage device, an energy storage system and a charging network. The energy storage device comprises a box body having a containing cavity, the box body comprising at least two support assemblies arranged at intervals along a first direction, each support assembly comprising at least one carrier and at least two first support members arranged at intervals along a gravity direction, the first support members being connected to the carrier, and the first direction intersecting the gravity direction; and at least two battery cell assemblies accommodated in the containing cavity, each battery cell assembly comprising a second support member and a plurality of battery cells, the plurality of battery cells being supported on the second support member, at least part of the battery cells being exposed to the containing cavity, and the at least two battery cell assemblies being arranged in layers along the gravity direction, and the second support member being supported on the first support members of two adjacent support assemblies along the first direction. The energy storage device provided by the application is beneficial to improving the energy density and reliability of the energy storage device.

Description

Technical Field

[0001] This application relates to energy storage technology, and more particularly to an energy storage device, energy storage system and charging network. Background Technology

[0002] 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. Alternatively, energy storage devices can be applied to electrical devices, where they are cyclically charged and discharged to provide power to the devices, facilitating the conversion of electrical energy into mechanical energy.

[0003] In the development of energy storage devices, in addition to improving the performance of energy storage devices, how to improve the reliability and energy density of energy storage devices is also a problem that those skilled in the art are constantly working to improve. Utility Model Content

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

[0005] In a first aspect, the energy storage device provided in this application includes a housing and at least two battery cell assemblies. The housing has a receiving cavity and includes at least two support assemblies spaced apart along a first direction. Each support assembly includes at least one load-bearing member and at least two first support members spaced apart along a gravity direction. The first support members are connected to the load-bearing member, and the first direction intersects the gravity direction. The battery cell assemblies are housed within the receiving cavity. Each battery cell assembly includes a second support member and multiple battery cells. The multiple battery cells are supported by the second support member, and at least a portion of each battery cell is exposed in the receiving cavity. At least two battery cell assemblies are stacked along the gravity direction, and the second support member is supported by the first support members of two adjacent support assemblies along the first direction.

[0006] The energy storage device provided in this application embodiment simplifies the structure of the second support by providing a second support member for the battery cell assembly, with at least a portion of the battery cell exposed in the receiving cavity. The second support member provides support for the battery cell and reduces its weight and space occupation, which is beneficial to improving the energy density of the energy storage device. Furthermore, by having the first support member of two adjacent support components along the first direction provide support for the battery cell assembly, the risk of the gravity of at least one battery cell assembly acting on the lower battery cell assembly is reduced, thereby reducing the risk of the lower battery cell being damaged by pressure and improving the reliability of the energy storage device.

[0007] In some embodiments, the energy storage device includes at least three support components spaced apart along a first direction, and at least one support component has a second support component on both sides of its carrier along the first direction. The energy storage device includes at least two battery cell stacks arranged along the first direction, each battery cell stack including at least two battery cell assemblies stacked along the direction of gravity. First support components connected to the same carrier on both sides of the first direction respectively support the battery cell assemblies of two adjacent battery cell stacks along the first direction.

[0008] In the above embodiments, by arranging multiple battery cell stacks along a first direction and setting at least two adjacent battery cell stacks along the first direction to be supported by the same support component, it is beneficial to increase the overall volume ratio of battery cells in the energy storage device and simplify the structure of the energy storage device, thereby increasing the energy density of the energy storage device.

[0009] In some embodiments, the first support extends along the second direction, the support assembly includes a plurality of carriers arranged along the second direction, the first support is connected to the plurality of carriers arranged along the second direction, and the plurality of battery cells of the same battery cell assembly are arranged at least along the second direction, the first direction, the second direction and the gravity direction intersect each other and are not coplanar.

[0010] In the above embodiments, by setting a first support member extending along a second direction and setting multiple carrier members spaced apart along the second direction and connected to the first support member respectively, it is beneficial to improve the overall structural stability of the support assembly and the support stability of the battery cell assembly. Furthermore, the first support member can slide with the battery cell assembly so that during the assembly of the energy storage device, the battery cell assembly can be pushed into place relative to the first support member along the first direction, which is beneficial to improve the convenience of assembling the battery cell assembly.

[0011] In some embodiments, multiple battery cells of the same battery cell assembly are arranged in an array along a first direction and a second direction.

[0012] In the above embodiments, by setting the battery cell assembly to include multiple battery cells arranged along the first direction and the second direction, it is beneficial to improve the energy density of the energy storage device and to improve the assembly efficiency of the energy storage device.

[0013] In some embodiments, the first support member includes a first support plate and a second support plate connected to each other, the second support plate being bent relative to the first support plate, the first support plate being attached to the carrier and disposed on the side of the battery cell assembly along a first direction, and the battery cell assembly being supported by the second support plate.

[0014] In the above embodiments, it is beneficial to improve the structural stability of the support components and their support stability for the battery cell components, and to improve the convenience of energy storage device assembly and the assembly efficiency of energy storage device.

[0015] In some embodiments, the support assembly further includes a first connector, which includes a first plate and a second plate connected to each other. The first plate is bent relative to the second plate. The first plate is attached to and connected to the load-bearing member, and the second plate is attached to and connected to the second support plate.

[0016] In the above embodiments, by providing a first connector, and by providing the first connector including a first plate and a second plate, it is beneficial to improve the connection strength between the first support and the load-bearing member, thereby improving the reliability of the support assembly for the battery cell.

[0017] In some embodiments, the housing also includes a protective element connected to the support assembly and enclosing a receiving cavity.

[0018] In the above embodiments, the support components not only provide support for the battery cell assembly, but also provide some support for the protective components, thereby providing a certain structural strength for the housing. This helps to simplify the overall structure of the energy storage device, reduce the space occupied by related structural components, and improve the energy density of the energy storage device.

[0019] In some embodiments, the housing further includes a first seal sandwiched between the support member and the protective member.

[0020] In the above embodiments, the first sealing element can provide a certain sealing performance to the connection interface between the carrier and the protective element, thereby improving the sealing effect of the protective element on the housing cavity of the box, reducing the risk of external rainwater entering the interior of the box and causing certain corrosion to structural components such as battery cells, and further improving the reliability of the energy storage device.

[0021] In some embodiments, the housing further includes a second connector, which includes a first connecting plate and a second connecting plate connected to each other. The first connecting plate is bent relative to the second connecting plate. The first connecting plate is attached to and connected to the protective component, and the second connecting plate is attached to and connected to the load-bearing component.

[0022] In the above embodiments, by providing a second connecting member including a first connecting plate and a second connecting plate, the first connecting plate is attached and connected to the protective member, and the second connecting plate is attached and connected to the load-bearing member. This helps to improve the reliability and stability of the connection between the protective member and the load-bearing member, thereby improving the structural stability of the enclosure.

[0023] In some embodiments, the battery cell assembly further includes a heat exchange assembly supported on a second support member, the battery cell being supported on the heat exchange assembly, and the heat exchange assembly being configured to exchange heat with the battery cell.

[0024] In the above embodiments, by setting up heat exchange components, the battery cells can be heated or cooled, so that the battery cells can work at a suitable temperature. By integrating the heat exchange components into the battery cell assembly, the heat exchange efficiency between the heat exchange components and the battery cells can be improved, and the assembly process of the energy storage device can be reduced.

[0025] In some embodiments, the second support includes a bottom frame beam and at least two side frame beams, the at least two side frame beams being connected to both sides of the bottom frame beam along a first direction and located on both sides of a plurality of battery cells along the first direction, the battery cells being supported by the bottom frame beam.

[0026] In the above embodiments, by setting the second support member including the bottom frame beam and the side frame beam, it is beneficial to improve the support reliability of the second support member for components such as battery cells, reduce the weight of battery cell assembly, improve the reliability of energy storage device, and the side frame beam can provide a certain limiting effect for multiple battery cells on both sides along the first direction, which facilitates the assembly of battery cells with the second support member and the assembly of battery cell assembly with the first support member, and helps to simplify the assembly process of energy storage device.

[0027] In some embodiments, the second support member further includes a stop member that extends along the first direction and the gravity direction. The stop member is connected to one end of the bottom frame beam along the second direction and is located on one side of multiple battery cells along the second direction. The first direction, the second direction, and the gravity direction intersect each other but are not coplanar.

[0028] In the above embodiments, the stop member can provide a limiting effect on multiple battery cells along the second direction, which facilitates the assembly of battery cells on the second support member and the installation of battery cell assembly on the first support member, thereby simplifying the assembly process of the energy storage device.

[0029] Secondly, the energy storage system provided in the embodiments of this application includes a power conversion device and an energy storage device provided in any of the above embodiments, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0030] The energy storage system provided in this application has the same technical effect as the energy storage device provided in any of the above embodiments, and will not be described again here.

[0031] Thirdly, the charging network provided in the embodiments of this application includes charging piles and energy storage devices provided in any of the above embodiments, or includes charging piles and energy storage systems provided in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0032] The charging network provided in this application has the same technical effect because it adopts the energy storage device or energy storage system provided in any embodiment of this application, and will not be described again here. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the charging network provided in an embodiment of this application; Figure 2 This is a schematic diagram of the energy storage system provided in the embodiments of this application; Figure 3 A front view of the energy storage device provided in the embodiments of this application; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the structure of the energy storage device provided in the embodiments of this application; Figure 6 This is a front view of the housing in the energy storage device provided in the embodiments of this application; Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along BB; Figure 8 for Figure 7 A magnified view of a section at point C; Figure 9 This is a schematic diagram of the structure of a battery cell assembly in an energy storage device provided in an embodiment of this application.

[0034] The accompanying drawings are not necessarily drawn to scale.

[0035] Explanation of reference numerals in the attached figures: 1000, Charging network; 2000, Energy storage system; 3000, Power generation device; 200. Energy storage devices; 300, charging piles; 400. Energy storage converter; 10. Housing; 10a. Receiving cavity; 11. Support assembly; 111. Bearing component; 112. First support component; 1121. First support plate; 1122. Second support plate; 113. First connector; 1131. First plate; 1132. Second plate; 12. Protective component; 13. Second connector; 131. First connecting plate; 132. Second connecting plate; 20. Battery cell stack; 21. Battery cell assembly; 211. Second support component; 2111. Bottom frame beam; 2112. Side frame beam; 2113. Stop component; 212. Heat exchange assembly; 30. Battery cell; X, the first direction; Y, the second direction; G, the direction of gravity. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] 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; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0038] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0039] 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.

[0040] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0041] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "top", "bottom", "inner", "outer", "circumferential", 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 element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0044] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. Specifically, if the angle between two directions is 85°-90°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0045] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0046] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0047] As an example, the battery cell 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. There are no particular limitations in the embodiments of this application.

[0048] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0049] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0050] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0051] In some implementations, the electrode assembly is a stacked structure.

[0052] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0053] 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.

[0054] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0055] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0056] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0057] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0058] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0059] 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.

[0060] In some embodiments, the battery cell 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.

[0061] In some embodiments, a pressure relief mechanism is provided on the casing of the battery cell. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0062] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of a battery cell 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 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.

[0063] As an example, the pressure relief mechanism can be integrally formed with the housing.

[0064] As an example, the pressure relief mechanism can also be separately installed and connected to the outer casing.

[0065] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0066] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0067] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0068] The energy storage device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via busbars.

[0069] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0070] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into an independent module. As an example, the battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] In some embodiments, the energy storage device may include a housing and one or more battery cell assemblies, the battery cell assemblies being housed within the housing.

[0072] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0073] As an example, the battery cell assembly can also be housed in the housing assembly by directly fixing multiple battery cells to the housing.

[0074] 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. The first enclosure may be a top cover or a bottom plate.

[0075] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the enclosure forms a closed space to accommodate the individual battery cells.

[0076] In related technologies, to improve the energy density of energy storage devices, the frame structure of battery cell modules is simplified by omitting parts of the frame assembly to reduce the weight of the battery cell module and increase the energy density of the energy storage device. While the frame assembly can provide some support for the individual battery cells within the same module, it cannot support other battery cell modules located above it along the direction of gravity. When battery cell modules are stacked along the direction of gravity, each battery cell module is susceptible to damage from the pressure of the other battery cell modules above it, thus affecting the reliability of the energy storage device.

[0077] In view of this, the energy storage device provided in this application embodiment includes a housing and at least two battery cell assemblies. The housing has a receiving cavity and includes at least two support assemblies spaced apart along a first direction. Each support assembly includes at least one load-bearing member and at least two first support members spaced apart along a gravity direction. The first support members are connected to the load-bearing member, and the first direction intersects the gravity direction. The battery cell assemblies are housed within the receiving cavity. Each battery cell assembly includes a second support member and a plurality of battery cells. The plurality of battery cells are supported by the second support member, and at least a portion of each battery cell is exposed in the receiving cavity. At least two battery cell assemblies are stacked along the gravity direction, and the second support member is supported by the first support members of two adjacent support assemblies along the first direction.

[0078] The energy storage device provided in this application simplifies the structure of the second support by providing a second support member for the battery cell assembly, with at least a portion of the battery cell exposed in the receiving cavity. The second support member provides support for the battery cell and reduces its weight and space occupation, which is beneficial to improving the energy density of the energy storage device. Furthermore, by having the first support member of two adjacent support components along the first direction provide support for the battery cell assembly, the risk of the gravity of at least one battery cell assembly acting on the battery cell assembly below is reduced, thereby reducing the risk of the battery cell below being damaged by pressure and improving the reliability of the energy storage device.

[0079] The technical solutions described in the embodiments of this application are applicable to energy storage devices, energy storage systems including energy storage devices, and charging networks including energy storage devices or energy storage systems.

[0080] Energy storage devices can be energy storage cabinets or energy storage containers, etc. Energy storage systems can be wind power generation systems, hydropower generation systems, solar power generation systems, energy storage power stations, or temporary power supply systems, etc.

[0081] Please refer to Figure 1 and Figure 3 , Figure 1This is a schematic diagram of the structure of a charging network 1000 provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of an energy storage device 200 provided in some embodiments of this application. Embodiments of this application provide a charging network 1000, which includes a charging pile 300 for charging electrical equipment. The charging network 1000 may also include an energy storage device 200, which is electrically connected to the charging pile 300 and provides power to the charging pile 300.

[0082] It should be noted that the charging pile 300 and the battery cells in the energy storage device 200 are electrically connected via cables, and the battery cells can supply their stored electrical energy to the charging pile 300. The charging pile 300 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's power. The application of the energy storage device 200 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to enhance the flexibility of the charging network 1000 during deployment.

[0083] In a charging network 1000, there can be one charging pile 300, and the energy storage device 200 provides power to the one charging pile 300; there can also be multiple charging piles 300, and the energy storage device 200 provides power to multiple charging piles 300.

[0084] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 200 and two charging piles 300, with the energy storage device 200 providing power to the two charging piles 300.

[0085] The energy storage device 200 may include a battery cell assembly 21, which is electrically connected to the charging pile 300 so that the battery cell assembly 21 can provide power to the charging pile 300.

[0086] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of an energy storage system 2000 provided in some embodiments of this application. Embodiments of this application provide an energy storage system 2000. The energy storage system 2000 includes an energy storage converter 400, which is electrically connected to a generator 3000 to convert the electrical power provided by the generator 3000. The energy storage system 2000 may also include an energy storage device 200, which is electrically connected to the energy storage converter 400. The energy storage converter 400 converts the electrical energy provided by the generator 3000 and stores it in the energy storage device 200.

[0087] A power conversion device is used to connect the power generation device 3000 and the energy storage device 200. The power generation device 3000 generates electrical energy and stores it in the energy storage device 200 via the power conversion device. The use of the energy storage device 200 in the energy storage system 2000 effectively improves its operational safety. In specific implementations, the power generation equipment can be solar panels, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of power generation equipment.

[0088] As an example, such as Figure 2 As shown, the energy storage system 2000 includes an energy storage device 200 and an energy storage converter 400. The two power generation devices 3000 respectively transmit the generated electrical energy to the energy storage converter 400, and the energy storage converter 400 introduces the electrical energy into the energy storage device 200 for storage.

[0089] Please refer to Figure 3 The energy storage device 200 includes a housing 10, and a battery cell assembly 21 is disposed inside the housing 10.

[0090] As an example, the energy storage device 200 can be an energy storage container, an energy storage cabinet, etc.

[0091] As an example, energy storage device 200 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 200. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 200, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply.

[0092] Firstly, such as Figure 3 , Figure 4 and Figure 5As shown, the energy storage device 200 provided in this embodiment includes a housing 10 and at least two battery cell assemblies 21. The housing 10 has a receiving cavity 10a and includes at least two support assemblies 11 spaced apart along a first direction X. Each support assembly 11 includes at least one carrier 111 and at least two first support members 112 spaced apart along a gravity direction G. The first support members 112 are connected to the carrier 111. The first direction X intersects the gravity direction G. The battery cell assemblies 21 are housed within the receiving cavity 10a. Each battery cell assembly 21 includes a second support member 211 and a plurality of battery cells 30. The plurality of battery cells 30 are supported by the second support member 211. At least a portion of each battery cell 30 is exposed in the receiving cavity 10a. At least two battery cell assemblies 21 are stacked along the gravity direction G. The second support member 211 is supported by the first support members 112 of two adjacent support assemblies 11 along the first direction X.

[0093] The housing 10 may include two, three, or more support components 11, which are spaced apart along a first direction X. Adjacent support components 11 provide support for at least two battery cell assemblies 21 arranged along the gravity direction G via a first support member 112. In other words, two, three, or more battery cell assemblies 21 stacked along the gravity direction G can be arranged between any two adjacent support components 11. In embodiments where the housing 10 includes three or more support components 11, the battery cell assemblies 21 can be arranged along both the gravity direction G and the first direction X.

[0094] Optionally, the support component 11 may be disposed within the receiving cavity 10a, or at least one support component 11 may be disposed as part of the wall of the housing 10, so that while providing support for the battery cell assembly 21 through the support component 11, it can also provide support for other components of the housing 10 through the support component 11, so as to further simplify the structure of the energy storage device 200 and improve the energy density of the energy storage device 200.

[0095] The support component 11 may include one, two or more carriers 111. Multiple carriers 111 may be spaced apart along the second direction Y. The second direction Y may intersect the first direction X and the gravity direction G in pairs but not be coplanar. In this way, the same first support component 112 may be connected to multiple carriers 111 to improve the reliability of the first support component 112 in supporting the battery cell assembly 21.

[0096] The first support member 112 may be plate-shaped, block-shaped, or other irregular shapes. The first support members 112 of two adjacent support components 11 may be arranged opposite to each other along the first direction X to provide support for the same battery cell assembly 21.

[0097] The support member 111 may be column-shaped and directly or indirectly connected to the first support member 112 by means of fasteners, welding, or tenon joints. For example, the first support member 112 and the support member 111 may be connected by intermediate connectors such as angle steel. The support member 111 may be connected to the bottom wall of the housing 10 by angle steel or similar means and supported by the bottom wall of the housing 10.

[0098] The battery cell assembly 21 may include two, three, or more battery cells 30. The multiple battery cells 30 may be arranged along one direction, such as the second direction Y, or they may be arranged in an array along the first direction X and the second direction Y. The multiple battery cells 30 are supported by a second support member 211, which in turn is supported by a first support member 112. Thus, the first support member 112 provides support for the battery cell assembly 21. In at least two battery cell assemblies 21 stacked along the gravity direction G, the gravity of the upper battery cell assembly 21 will not act on the lower battery cell assembly 21, reducing the risk of mutual compression between battery cell assemblies 21 stacked along the gravity direction G due to gravity.

[0099] The support assembly 11 can be provided with two, three or more first support members 112 spaced apart along the gravity direction G. By reasonably setting the spacing of the first support members 112 along the gravity direction G, a battery cell assembly 21 can be accommodated between two adjacent first support members 112 along the gravity direction G, so that the same support assembly 11 can provide support for multiple battery cell assemblies 21 arranged along the gravity direction G.

[0100] The second support member 211 of the battery cell assembly 21 can provide support for the corresponding battery cell 30. However, since at least a portion of the battery cell 30 is exposed in the receiving cavity 10a, at least a portion of the battery cell 30 is not shielded or protected by the second support member 211. For example, at least a portion of the battery cell 30 above the direction of gravity G is exposed within the receiving cavity 10a. In this way, the second support member 211 can simply provide support for the battery cell 30 without providing protection, which can be provided by the housing 10. This simplifies the structure of the second support member 211, reduces its weight, and reduces the space occupied by the battery cell assembly 21 within the receiving cavity 10a.

[0101] It is understood that if at least a portion of the battery cell 30 is exposed to the receiving cavity 10a, then at least a portion of the surface of the battery cell 30 is not obscured or covered by any other components within the receiving cavity 10a.

[0102] The second support member 211 can be plate-shaped and disposed below the plurality of battery cells 30 along the direction of gravity G and on both sides along the first direction X, without any part of it being disposed above the plurality of battery cells 30 along the direction of gravity G. Alternatively, the second support member 211 can be a frame beam structure and disposed below the plurality of battery cell assemblies 21 along the direction of gravity G and on both sides along the first direction X, without any part of it being disposed above the plurality of battery cells 30 along the direction of gravity G. The bottom portions of the second support member 211 on both sides along the first direction X can be respectively supported by the first support members 112 of two adjacent support assemblies 11 along the first direction X.

[0103] Two, three, or more battery cell assemblies 21 can be arranged between two adjacent support components 11 along the first direction X, so that multiple battery cell assemblies 21 can be stacked along the direction of gravity G. In this way, the number of battery cells 30 contained in the housing 10 can be increased, thereby increasing the energy density of the energy storage device 200, and the horizontal space occupied by the energy storage device 200 can be reduced, making it easier to arrange the space of the energy storage device 200 more flexibly.

[0104] The energy storage device 200 provided in this application simplifies the structure of the second support member 211 by providing the battery cell assembly 21 with a second support member 211, and exposing at least a portion of the battery cell 30 to the receiving cavity 10a. The second support member 211 provides support for the battery cell 30 and reduces the weight and space occupied by the second support member 211, which is beneficial to improving the energy density of the energy storage device 200. Furthermore, by providing support for the battery cell assembly 21 with the first support member 112 of the two adjacent support members 11 along the first direction X, the risk of the weight of at least one battery cell assembly 21 acting on the lower battery cell assembly 21 is reduced, thereby reducing the risk of the lower battery cell 30 being damaged by pressure, which is beneficial to improving the reliability of the energy storage device 200.

[0105] In some embodiments, such as Figure 3 and Figure 5 As shown, the energy storage device 200 includes at least three support components 11 spaced apart along a first direction X. At least one support component 11 has a second support component 211 on both sides of its carrier 111 along the first direction X. The energy storage device 200 includes at least two battery cell stacks 20 arranged along the first direction X. Each battery cell stack 20 includes at least two battery cell assemblies 21 stacked along the gravity direction G. First support components 112 connected to the same carrier 111 on both sides along the first direction X respectively support the battery cell assemblies 21 of two adjacent battery cell stacks 20 along the first direction X.

[0106] The energy storage device 200 may include three, four, or more support components 11. These support components 11 are spaced apart along a first direction X. Among the two support components 11 located on either side of the support component 11 along the first direction X, a first support member 112 may be provided only on the side of the carrier 111 facing the adjacent support component 11 along the first direction X. The other support components 11 located between the two support components 11 on either side of the carrier 111 along the first direction X may have first support members 112 on both sides of the carrier 111 along the first direction X. This allows the first support components 11 on both sides of the carrier 111 to provide support for the battery cell assemblies 21 on both sides. In this way, two adjacent battery cell stacks 20 along the first direction X can be supported by the same support component 11, ensuring that at least one support component 11 can provide support for the battery cell assemblies 21 on both sides of the carrier 111. This simplifies the overall structure of the housing 10 and improves the energy density of the energy storage device 200.

[0107] A battery cell stack 20 may include two, three, or more battery cell assemblies 21 arranged along the direction of gravity G. Different battery cell assemblies 21 are supported by different first support members 112 arranged along the direction of gravity G. The number of battery cell assemblies 21 in a battery cell stack 20 can be configured in a one-to-one correspondence with the first support members 112 in the corresponding support assembly 11, so that different first support members 112 provide support for different battery cell assemblies 21.

[0108] The energy storage device 200 may include two, three, or more battery cell stacks 20 arranged along the first direction X, and the number of battery cell assemblies 21 arranged along the gravity direction G in different battery cell stacks 20 may be the same. Correspondingly, the number of support assemblies 11 arranged along the first direction X in the housing 10 may be three, four, or more.

[0109] For example, the number of support components 11 arranged along the first direction X is one more than the number of battery cell stacks 20 arranged along the first direction X, so that any two adjacent battery cell stacks 20 along the first direction X can share the same support component 11, thereby simplifying the structure of the housing 10 and improving the energy density of the energy storage device 200.

[0110] Therefore, by arranging multiple battery cell stacks 20 along the first direction X, and setting at least two adjacent battery cell stacks 20 along the first direction X with battery cell assemblies 21 supported on the same support assembly 11, it is beneficial to increase the overall volume ratio of battery cells 30 in the energy storage device 200, simplify the structure of the energy storage device 200, and thereby increase the energy density of the energy storage device 200.

[0111] In some embodiments, such as Figure 5 , Figure 6 and Figure 7 As shown, the first support member 112 extends along the second direction Y, and the support assembly 11 includes a plurality of carrier members 111 arranged along the second direction Y. The first support member 112 is connected to the plurality of carrier members 111 arranged along the second direction Y. The plurality of battery cells 30 of the same battery cell assembly 21 are arranged at least along the second direction Y. The first direction X, the second direction Y and the gravity direction G intersect each other and are not coplanar.

[0112] The first direction X, the second direction Y, and the gravity direction G can intersect each other at obtuse angles, acute angles, or right angles, etc. For example, the first direction X, the second direction Y, and the gravity direction are perpendicular to each other.

[0113] The first support member 112 extends along the second direction Y. At least a portion of the first support member 112 can be strip-shaped, plate-shaped, or other shapes along the second direction Y. In this way, during the assembly of the energy storage device 200, the bottom of the second support member 211 of the battery cell assembly 21 can be attached to the first support member 112, and the battery cell assembly 21 can be pushed inward from one end of the first support member 112 along the second direction Y until the battery cell assembly 21 is assembled in place. This facilitates the assembly process of the battery cell assembly 21.

[0114] Multiple carriers 111 are spaced apart along the second direction Y. The same first support 112 is connected to multiple carriers 111 at different positions along the second direction Y. This helps to improve the support stability of the carriers 111 on the first support 112, thereby improving the support stability of the support assembly 11 on the battery cell assembly 21.

[0115] Furthermore, after the energy storage device 200 is assembled, the first support member 112 has a larger contact area with the second support member 211 of the battery cell assembly 21 along the second direction Y, which is beneficial to improving the support stability of the first support member 112 for the battery cell assembly 21.

[0116] Therefore, by setting the first support member 112 to extend along the second direction Y and setting multiple carrier members 111 to be spaced apart along the second direction Y and connected to the first support member 112 respectively, it is beneficial to improve the overall structural stability of the support assembly 11 and the support stability of the battery cell assembly 21. Moreover, the first support member 112 can slide and cooperate with the battery cell assembly 21 so that during the assembly of the energy storage device 200, the battery cell assembly 21 can be pushed into place relative to the first support member 112 along the first direction X, which is beneficial to improve the convenience of assembling the battery cell assembly 21.

[0117] In some embodiments, such as Figure 3 , Figure 5 and Figure 9As shown, multiple battery cells 30 of the same battery cell assembly 21 are arranged in an array along the first direction X and the second direction Y.

[0118] The same second support component 11 supports multiple battery cells 30 arranged along the first direction X and the second direction Y. In this way, during the assembly of the energy storage device 200, after the multiple battery cells 30 arranged along the first direction X and the second direction Y are respectively assembled on the corresponding second support component 211, the battery cell assembly 21 is then installed on the support component 11. Thus, more battery cells 30 can be assembled at one time, which helps to improve the assembly efficiency of the energy storage device 200.

[0119] Furthermore, after the energy storage device 200 is assembled, the volume ratio of the battery cell 30 in a battery cell module 21 is higher, which is beneficial to improving the energy density of the energy storage device 200.

[0120] Therefore, by setting the battery cell assembly 21 to include multiple battery cells 30 arranged along the first direction X and the second direction Y, it is beneficial to improve the energy density of the energy storage device 200 and to improve the assembly efficiency of the energy storage device 200.

[0121] In some embodiments, such as Figure 3 and Figure 4 As shown, the first support member 112 includes a first support plate 1121 and a second support plate 1122 connected to each other. The second support plate 1122 is bent relative to the first support plate 1121. The first support plate 1121 is attached to the carrier member 111 and is located on the side of the battery cell assembly 21 along the first direction X. The battery cell assembly 21 is supported by the second support plate 1122.

[0122] The first support plate 1121 and the second support plate 1122 can be integrally formed and formed by bending process to form the first support plate 1121 and the second support plate 1122 intersecting each other. Alternatively, the two can be connected separately and then connected together by welding, threaded connection, riveting or pin connection.

[0123] The normals of the first support plate 1121 and the second support plate 1122 can intersect at right angles, acute angles, or obtuse angles, which can be selected according to actual needs. The first support plate 1121 is in contact with the bearing member 111, and the two can be in surface contact to increase the mating area between the first support plate 1121 and the bearing member 111, thereby improving the support stability of the bearing member 111 on the first support plate 1121.

[0124] The second support plate 1122 can fit against the bottom of the second support member 211 and provide support for the battery cell assembly 21. This helps to increase the support area of ​​the first support member 112 on the second support member 211 and further improve the support stability of the first support member 112 on the battery cell assembly 21.

[0125] Furthermore, during the assembly of the battery cell assembly 21 onto the support assembly 11, the bottom of the second support member 211 can slide and engage with the second support plate 1122, providing a certain guiding effect on the bottom of the second support member 211. Meanwhile, the first support plate 1121 can provide a certain guiding effect on both sides of the first support member 112 along the first direction X, which helps to improve the smoothness of the assembly of the battery cell assembly 21.

[0126] Therefore, this configuration is beneficial to improving the structural stability of the support component 11 and its support stability for the battery cell component 21, as well as improving the ease of assembly of the energy storage device 200 and increasing the assembly efficiency of the energy storage device 200.

[0127] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the support assembly 11 also includes a first connector 113, which includes a first plate 1131 and a second plate 1132 connected to each other. The first plate 1131 is bent relative to the second plate 1132. The first plate 1131 is attached to and connected to the carrier 111, and the second plate 1132 is attached to and connected to the second support plate 1122.

[0128] The first plate 1131 and the second plate 1132 of the first connector 113 can be integrally formed, or the first plate 1131 and the second plate 1132 can be processed separately and then connected together. For example, the first plate 1131 and the second plate 1132 can be integrally formed and formed by bending process. This helps to improve the connection strength of the first plate 1131 and the second plate 1132, thereby improving the overall structural strength of the support assembly 11.

[0129] The first connecting member 113 can be located at the bottom of the first support member 112 along the direction of gravity G. The first plate 1131 and the bearing member 111 can be connected together by screws, pins, bolts or welding. The first plate 1131 fits into the bearing member 111 to increase the mating area between the first plate 1131 and the bearing member 111, thereby increasing the connection strength between the first connecting member 113 and the bearing member 111.

[0130] The second plate 1132 and the second support plate 1122 can be connected by screws, pins, bolts or welding. The bottom of the second plate 1132 and the second support plate 1122 are attached to each other to increase the mating area between the second plate 1132 and the second support plate 1122, thereby increasing the connection strength between the two.

[0131] Therefore, by setting the first connector 113, and setting the first connector 113 to include the first plate 1131 and the second plate 1132, it is beneficial to improve the connection strength between the first support member 112 and the bearing member 111, thereby improving the support reliability of the support assembly 11 for the battery cell 30.

[0132] In some embodiments, such as Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the housing 10 also includes a protective member 12, which is connected to the support assembly 11 and forms a receiving cavity 10a.

[0133] The protective component 12 can provide a certain degree of protection for the battery cell assembly 21 and other related components inside the housing 10, reducing the risk of external rainwater entering the interior of the housing 10 and causing corrosion to the battery cell 30 or other structural components.

[0134] The protective member 12 is connected to the support assembly 11 and surrounds the cavity 10a to provide a certain sealing performance for the cavity 10a. Optionally, the protective member 12 can be connected to and supported on the side of the support member 111 of the support assembly 11 that is away from the first support member 112, or the protective member 12 can be connected to and supported on the side of the support member 111 that is adjacent to the first support member 112.

[0135] For example, the protective member 12 on the side of the support assembly 11 along the first direction X can be connected to the side of the carrier 111 opposite to the first support member 112 along the first direction X by means of welding, threaded connection, riveting, or pin connection. Similarly, the protective member 12 on the side of the support assembly 11 along the second direction Y can be connected to the side of the carrier 111 along the second direction Y by means of welding, threaded connection, or pin connection.

[0136] In this way, the support component 11 can provide support for the battery cell component 21 and also provide some support for the protective component 12, thereby providing a certain structural strength for the housing 10. This helps to simplify the overall structure of the energy storage device 200, reduce the space occupied by related structural components, and improve the energy density of the energy storage device 200.

[0137] In some embodiments, the housing 10 further includes a first seal, which is sandwiched between the support member 111 and the protective member 12.

[0138] Optionally, the first seal may be a sealing ring, or the first seal may be formed by curing a fluid adhesive. A groove may be provided in at least one of the carrier 111 and the protective member 12, and at least a portion of the first seal may be accommodated in the groove, so as to limit the first seal by the groove and improve the structural stability of the first seal.

[0139] The support member 111 may be provided with different first sealing members on the side of the first direction X and the side of the second direction Y, and the first sealing members are provided to surround the periphery of the receiving cavity 10a. That is, the first sealing members cover the receiving cavity 10a with the orthographic projection along the first direction X or the second direction Y, so as to provide a certain sealing effect on the receiving cavity 10a.

[0140] Understandably, since the second support member 211 of the battery assembly does not provide a certain sealing performance for the battery cell 30, by setting the first sealing member sandwiched between the support member 111 and the protective member 12, the first sealing member can provide a certain sealing performance for the connection interface between the support member 111 and the protective member 12, thereby improving the sealing effect of the protective member 12 on the housing cavity 10a of the housing 10, reducing the risk of external rainwater and other substances entering the interior of the housing 10 and causing certain corrosion to the battery cell 30 and other structural components, and further improving the reliability of the energy storage device 200.

[0141] In some embodiments, such as Figure 7 and Figure 8 As shown, the housing 10 also includes a second connector 13, which includes a first connecting plate 131 and a second connecting plate 132 that are connected to each other. The first connecting plate 131 is bent relative to the second connecting plate 132. The first connecting plate 131 is attached to and connected to the protective member 12, and the second connecting plate 132 is attached to and connected to the bearing member 111.

[0142] The first connecting plate 131 and the second connecting plate 132 can be integrally formed, or the first connecting plate 131 and the second connecting plate 132 can be separately processed and then connected together by welding, threaded connection or other connection methods. For example, the first connecting plate 131 and the second connecting plate 132 are integrally formed, and the first connecting plate 131 and the second connecting plate 132 are respectively formed by bending process.

[0143] The first connecting plate 131 and the protective component 12 can be connected by means of threaded connection, welding connection, pin connection or riveting, and the first connecting plate 131 and the protective component 12 are closely fitted to each other to increase the mating area between the two and improve the connection reliability between the first connecting plate 131 and the protective component 12.

[0144] The second connecting plate 132 and the first support member 112 can be connected by means of threaded connection, welding connection, pin connection or riveting, and the second connecting plate 132 and the bearing member 111 are in close contact with each other to increase the mating area between the second connecting plate 132 and the bearing member 111, thereby improving the connection reliability between the second connecting plate 132 and the bearing member 111.

[0145] Therefore, by setting the second connecting member 13 to include the first connecting plate 131 and the second connecting plate 132, so that the first connecting plate 131 is attached and connected to the protective member 12, and the second connecting plate 132 is attached and connected to the bearing member 111, it is beneficial to improve the connection reliability and stability between the protective member 12 and the bearing member 111, thereby improving the structural stability of the box 10.

[0146] In some embodiments, such as Figure 3 , Figure 5 and Figure 9 As shown, the battery cell assembly 21 also includes a heat exchange assembly 212, which is supported by a second support member 211. The battery cell 30 is supported by the heat exchange assembly 212, and the heat exchange assembly 212 is configured to exchange heat with the battery cell 30.

[0147] The heat exchange component 212 may have a flow channel for the flow of heat exchange medium, which may be liquid or gas. During the process of the heat exchange medium flowing through the heat exchange component 212, it exchanges heat with the battery cell 30 to heat or cool the battery cell 30 so that the battery cell 30 can work at a suitable temperature.

[0148] The bottom of the battery cell 30 can be in contact with the heat exchange assembly 212 to facilitate efficient heat exchange between the two. When cooling of the battery cell 30 is required, a low-temperature heat exchange medium flows into the heat exchange assembly 212. During its flow through the heat exchange assembly 212, it exchanges heat with the battery cell 30, absorbing heat from the battery cell 30 before flowing out. This continuously provides the heat exchange assembly 212 with a low-temperature heat exchange medium, thus continuously cooling the battery cell 30.

[0149] Integrating the heat exchange component 212 inside the battery cell assembly 21 allows the heat exchange component 212 to be assembled as a whole with the battery cell assembly 21 during the assembly process of the battery cell assembly 21, and to be supported by the first support member 112, which helps to simplify the process difficulty of assembling the energy storage device 200.

[0150] Therefore, by setting up the heat exchange component 212, the battery cell 30 can be heated or cooled through the heat exchange component 212, so that the battery cell 30 can work at a suitable temperature. By integrating the heat exchange component 212 into the battery cell assembly 21, the heat exchange efficiency between the heat exchange component 212 and the battery cell 30 can be improved, and the assembly process of the energy storage device 200 can also be reduced.

[0151] In some embodiments, such as Figure 9 As shown, the second support member 211 includes a bottom frame beam 2111 and at least two side frame beams 2112. The at least two side frame beams 2112 are connected to both sides of the bottom frame beam 2111 along the first direction X and are located on both sides of a plurality of battery cells 30 along the first direction X. The battery cells 30 are supported on the bottom frame beam 2111.

[0152] The bottom frame beam 2111 and the side frame beam 2112 may each include intersecting beam structures. In this way, while improving the load-bearing capacity of the second support member 211, it is also beneficial to reduce the weight of the second support member 211 and simplify the structure of the second support member 211.

[0153] The bottom frame beam 2111 can be located at the bottom of the multiple battery cells 30 along the gravity direction G to provide support for the battery cells 30 along the gravity direction G. The side frame beam 2112 is located on both sides of the multiple battery cells 30 along the first direction X to provide a limiting effect for the battery cells 30 along the first direction X, which facilitates the assembly of the battery cells 30 and the second support member 211.

[0154] The bottom frame beam 2111 and the side frame beam 2112 can be integrally formed, or they can be processed and formed separately and then connected together by welding, threaded connection, riveting or pin connection.

[0155] By setting the second support member 211, which includes a bottom frame beam 2111 and a side frame beam 2112, it is beneficial to improve the support reliability of the second support member 211 for components such as battery cells 30, reduce the weight of battery cell assembly 21, improve the reliability of energy storage device 200, and the side frame beam 2112 can provide a certain limiting effect for multiple battery cells 30 on both sides along the first direction X, which facilitates the assembly of battery cells 30 with the second support member 211 and the assembly of battery cell assembly 21 with the first support member 112, and simplifies the assembly process of energy storage device 200.

[0156] In some embodiments, such as Figure 9As shown, the second support member 211 also includes a stop member 2113. The stop member 2113 extends along the first direction X and the gravity direction G. The stop member 2113 is connected to one end of the bottom frame beam 2111 along the second direction Y and is located on one side of the multiple battery cells 30 along the second direction Y. The first direction X, the second direction Y and the gravity direction G intersect each other and are not coplanar.

[0157] The stop member 2113 can be in the form of a plate or a strip. The stop member 2113 and the bottom frame beam 2111 can be connected together by welding or other means, and it is located at one end of the multiple battery cells 30 along the second direction Y.

[0158] During the assembly of the energy storage device 200, the stop member 2113 can provide a stop for the battery cell 30 along the second direction Y, reducing the risk of the battery cell 30 falling off the bottom frame beam 2111 and facilitating the installation of the battery cell assembly 21 on the first support member 112.

[0159] The stop member 2113 can also connect the side frame beams 2112 on both sides along the first direction X to improve the overall structural stability of the second support member 211.

[0160] Therefore, the stop 2113 can provide a limiting effect on multiple battery cells 30 along the second direction Y, which facilitates the assembly of battery cells 30 on the second support 211 and the installation of battery cell assembly 21 on the first support 112, thereby simplifying the assembly process of the energy storage device 200.

[0161] Secondly, such as Figure 2 As shown, the energy storage system 2000 provided in this application embodiment includes a power conversion device and an energy storage device 200 provided in any of the above embodiments. The power conversion device is used to electrically connect the power generation device 3000 and the energy storage device 200.

[0162] The energy storage system 2000 provided in this application has the same technical effect as the energy storage device 200 provided in any of the above embodiments, and will not be described again here.

[0163] Thirdly, such as Figure 1 As shown, the charging network 1000 provided in this application embodiment includes a charging pile 300 and an energy storage device 200 provided in any of the above embodiments, or it includes a charging pile 300 and an energy storage system 2000 provided in the above embodiments, wherein the energy storage device 200 is used to provide electrical energy to the charging pile 300.

[0164] The charging network 1000 provided in this application embodiment has the same technical effect as the energy storage device 200 or energy storage system 2000 provided in any of the above embodiments, and will not be described again here.

[0165] The following description, in conjunction with the accompanying drawings, illustrates a specific embodiment of the energy storage device 200 provided in this application.

[0166] The energy storage device 200 provided in this application embodiment includes a housing 10 and at least two battery cell stacks 20 arranged along a first direction X. The battery cell stack 20 includes at least two battery cell assemblies 21 stacked along the gravity direction G. The housing 10 has a receiving cavity 10a. The housing 10 includes at least three support assemblies 11 spaced apart along a first direction X. Each support assembly 11 includes at least one carrier 111 and at least two first support members 112 spaced apart along the gravity direction G. The first support members 112 are connected to the carrier 111. A battery cell assembly 21 is housed in the receiving cavity 10a. The battery cell assembly 21 includes a second support member 211 and a plurality of battery cells 30. The plurality of battery cells 30 are supported on the second support member 211. At least a portion of the battery cells 30 is exposed in the receiving cavity 10a. The second support member 211 is supported on the first support members 112 of two adjacent support assemblies 11 along the first direction X. The carrier 111 of at least one support assembly 11 has second support members 211 on both sides along the first direction X. The first support members 112 connected to the same carrier 111 on both sides along the first direction X respectively support the battery cell assembly 21 of two adjacent battery cell stacks 20 along the first direction X. The first support member 112 extends along the second direction Y. The support assembly 11 includes multiple carrier members 111 arranged along the second direction Y. The first support member 112 is connected to the multiple carrier members 111 arranged along the second direction Y. Multiple battery cells 30 of the same battery cell assembly 21 are arranged at least along the second direction Y. The first direction X, the second direction Y, and the gravity direction G intersect each other but are not coplanar. Multiple battery cells 30 of the same battery cell assembly 21 are arranged in an array along the first direction X and the second direction Y.

[0167] The first support member 112 includes a first support plate 1121 and a second support plate 1122 connected to each other. The second support plate 1122 is bent relative to the first support plate 1121. The first support plate 1121 is attached to the carrier member 111 and is located on the side of the battery cell assembly 21 along the first direction X. The second support member 211 is attached to and supported by the second support plate 1122. The support assembly 11 also includes a first connector 113, which includes a first plate 1131 and a second plate 1132 connected to each other. The first plate 1131 is bent relative to the second plate 1132. The first plate 1131 is attached to and connected to the carrier member 111, and the second plate 1132 is attached to and connected to the second support plate 1122.

[0168] The housing 10 also includes a protective member 12, which is connected to the support assembly 11 and forms a receiving cavity 10a. The energy storage device 200 also includes a first sealing member, which is sandwiched between the bearing member 111 and the protective member 12. The housing 10 also includes a second connecting member 13, which includes a first connecting plate 131 and a second connecting plate 132 connected to each other. The first connecting plate 131 is bent relative to the second connecting plate 132. The first connecting plate 131 is attached and connected to the protective member 12, and the second connecting plate 132 is attached and connected to the bearing member 111.

[0169] The battery cell assembly 21 also includes a heat exchange assembly 212, which is supported by a second support member 211. The battery cells 30 are supported by the heat exchange assembly 212, which is configured to exchange heat with the battery cells 30. The second support member 211 includes a bottom frame beam 2111, at least two side frame beams 2112, and a stop member 2113. The at least two side frame beams 2112 are connected to both sides of the bottom frame beam 2111 along a first direction X and are located on both sides of the plurality of battery cells 30 along the first direction X. The battery cells 30 are supported by the bottom frame beam 2111. The stop member 2113 extends along the first direction X and the gravity direction G, and is connected to one end of the bottom frame beam 2111 along a second direction Y, and is located on one side of the plurality of battery cells 30 along the second direction Y.

[0170] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: A housing having a receiving cavity, the housing including at least two support components spaced apart along a first direction, each support component including at least one load-bearing member and at least two first support members spaced apart along a gravity direction, the first support members being connected to the load-bearing member, the first direction intersecting the gravity direction; At least two battery cell assemblies are housed within the receiving cavity. Each battery cell assembly includes a second support member and a plurality of battery cells. The plurality of battery cells are supported by the second support member. At least a portion of each battery cell is exposed in the receiving cavity. At least two battery cell assemblies are stacked along the direction of gravity. The second support member is supported by the first support member of two adjacent support assemblies along the first direction.

2. The energy storage device according to claim 1, characterized in that, The housing includes at least three support components spaced apart along the first direction, and at least one of the support components has a second support component on both sides of the load-bearing member along the first direction. The energy storage device includes at least two battery cell stacks arranged along the first direction. Each battery cell stack includes at least two battery cell assemblies stacked along the gravity direction. The first support members connected to the same carrier on both sides of the first direction respectively support the battery cell assemblies of two adjacent battery cell stacks along the first direction.

3. The energy storage device according to claim 1, characterized in that, The first support member extends along the second direction, and the support assembly includes a plurality of carrier members arranged along the second direction. The first support member is connected to the plurality of carrier members arranged along the second direction. A plurality of battery cells of the same battery cell assembly are arranged at least along the second direction. The first direction, the second direction and the gravity direction intersect each other and are not coplanar.

4. The energy storage device according to claim 3, characterized in that, Multiple battery cells of the same battery cell assembly are arranged in an array along the first direction and the second direction.

5. The energy storage device according to claim 1, characterized in that, The first support member includes a first support plate and a second support plate connected to each other. The second support plate is bent relative to the first support plate. The first support plate is attached to the carrier and is located on the side of the battery cell assembly along the first direction. The second support member is attached to the second support plate and is supported by the second support plate.

6. The energy storage device according to claim 5, characterized in that, The support assembly further includes a first connector, which includes a first plate and a second plate that are connected to each other. The first plate is bent relative to the second plate. The first plate is attached to and connected to the load-bearing member, and the second plate is attached to and connected to the second support plate.

7. The energy storage device according to any one of claims 1 to 6, characterized in that, The housing also includes a protective component connected to the support assembly and forming the receiving cavity.

8. The energy storage device according to claim 7, characterized in that, The energy storage device further includes a first sealing element, which is sandwiched between the supporting element and the protective element.

9. The energy storage device according to claim 7, characterized in that, The enclosure also includes a second connector, which includes a first connecting plate and a second connecting plate that are connected to each other. The first connecting plate is bent relative to the second connecting plate. The first connecting plate is attached to and connected to the protective component, and the second connecting plate is attached to and connected to the load-bearing component.

10. The energy storage device according to any one of claims 1 to 6, characterized in that, The battery cell assembly further includes a heat exchange component, which is supported by the second support member. The battery cell is supported by the heat exchange component, and the heat exchange component is configured to exchange heat with the battery cell.

11. The energy storage device according to any one of claims 1 to 6, characterized in that, The second support member includes a bottom frame beam and at least two side frame beams. The at least two side frame beams are connected to both sides of the bottom frame beam along the first direction and are located on both sides of the plurality of battery cells along the first direction. The battery cells are supported by the bottom frame beam.

12. The energy storage device according to claim 11, characterized in that, The second support member also includes a stop member, which extends along the first direction and the gravity direction. The stop member is connected to one end of the bottom frame beam along the second direction and is disposed on one side of the plurality of battery cells along the second direction. The first direction, the second direction and the gravity direction intersect each other and are not coplanar.

13. An energy storage system, characterized in that, It includes a power conversion device and an energy storage device as described in any one of claims 1 to 12, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

14. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in any one of claims 1 to 12, or it includes a charging pile and an energy storage system as described in claim 13, wherein the energy storage device is used to provide electrical energy to the charging pile.

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