Box assembly, battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a box body assembly, a battery device, an energy storage device and a power utilization device. The battery device comprises a battery cell assembly and a box body assembly. And the battery monomer assembly is arranged in the box body assembly. The box body assembly comprises a first box body, a second box body and a connecting piece. The first box body includes a first box body and a reinforcement. The first box body is provided with a mounting hole. The reinforcing piece comprises a reinforcing plate and a nesting sleeve, and the nesting sleeve is connected with the reinforcing plate. The reinforcing piece is embedded in the first box body through the reinforcing plate, and the embedding sleeve penetrates through the mounting hole. The nesting sleeve is provided with a connecting hole, the connecting piece is arranged in the connecting hole in a penetrating mode, and the first box body and the second box body are connected. According to the battery device provided by the embodiment of the invention, the structural strength of the first box body is improved, the risk of airtight failure caused by creep deformation of the first box body is reduced, the bonding strength of the nesting and the first box main body is improved, the problem of falling of the nesting can be improved, and the reliability of the first box body is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a housing assembly, a battery device, an energy storage device, and an electrical device. Background Art

[0002] This section is intended to provide background or context for embodiments of this application. The description herein is not intended to imply that it is prior art simply because it is included in this section.

[0003] In new energy vehicles equipped with battery devices, the battery devices can provide all or part of the power. The housing needs to have good sealing performance and structural strength. At least part of the housing structure is injection molded. During the locking process, the locking holes of the injection molded parts are prone to wear and crushing. In related technologies, additional nesting is added to the locking holes to prevent bolt wear and crushing, but there is a problem that the nesting is prone to falling off. Utility Model Content

[0004] In view of this, the embodiments of this application aim to provide a housing assembly, a battery device, an energy storage device, and an electrical device, which can improve the problem of nesting falling off to a certain extent.

[0005] To achieve the above objectives, a first aspect of this application provides a battery device, comprising:

[0006] Enclosure assembly;

[0007] A battery cell assembly, wherein the battery cell assembly is disposed within the housing assembly;

[0008] The enclosure assembly includes a first enclosure, a second enclosure, and a connector. The first enclosure includes:

[0009] The first box body is provided with mounting holes;

[0010] The reinforcing member includes a reinforcing plate and a nest, the nest being connected to the reinforcing plate. The reinforcing member is embedded in the first box body through the reinforcing plate, and the nest is inserted through the mounting hole. The nest is provided with a connecting hole, and a connecting member is inserted through the connecting hole to connect the first box body and the second box body.

[0011] The battery device provided in this application includes a housing assembly and battery cell assemblies. The battery cell assemblies are disposed within the housing assembly, and the housing assembly protects the battery cell assemblies. Firstly, by providing a reinforcing member embedded in the first housing body, the reinforcing member includes a nesting element that passes through a mounting hole. This improves the structural strength, sealing performance, and reliability of the first housing body by mitigating the potential for wear and crushing of the mounting hole. Secondly, the reinforcing member is embedded in the first housing body via a reinforcing plate. This improves the structural strength of the first housing body, reduces the risk of airtight failure due to creep deformation, and enhances the bonding strength between the nesting element and the first housing body, thus mitigating the problem of nesting element detachment and improving the reliability of the first housing body.

[0012] In some embodiments, the first box body is constructed by injection molding onto the reinforcing member.

[0013] This design improves the bonding strength between the main body of the first housing and the reinforcing members, thereby further enhancing the structural strength of the first housing and reducing the risk of airtight failure due to creep deformation. Furthermore, it strengthens the bond between the nesting and the main body of the first housing, mitigating the risk of nesting detachment and thus improving the reliability of the first housing. Moreover, it reduces the number of components requiring assembly, thereby increasing assembly efficiency.

[0014] In some embodiments, the reinforcement is a composite material structure or a metal structure.

[0015] In this embodiment, by setting the reinforcing member as a composite material structure or a metal structure, the reinforcing member can have high strength. This helps to improve the problem that the mounting holes of the first housing may be worn and crushed, and can improve the structural strength, sealing performance and reliability of the first housing.

[0016] In some embodiments, when projected onto a plane parallel to the reinforcing plate, the ratio between the projected area of ​​the reinforcing member and the projected area of ​​the nested member is greater than 1 and less than or equal to 20.

[0017] In this embodiment, by setting the ratio between the projected area of ​​the reinforcing member and the projected area of ​​the nest to be greater than 1 and less than or equal to 20, an appropriate ratio within this range can help improve the structural strength of the first box and the bonding strength between the nest and the main body of the first box. To a certain extent, this can improve the problem of the nest falling off. In addition, it can also reduce costs.

[0018] In some embodiments, the reinforcement is provided with one or more of the aforementioned nesting.

[0019] In some embodiments, the first box body includes a main body portion and a mounting portion, at least a portion of the outer side wall of the main body portion protrudes to form the mounting portion, the mounting portion forms the mounting hole, and the reinforcing member is embedded in the mounting portion.

[0020] In this embodiment, by embedding the reinforcing member into the mounting part, the rigidity of the mounting part is improved, and the strength of the reinforcing member itself provides good constraint on the outer contour of the mounting part, which helps to reduce the outward deformation of the mounting part and the degree of outward protrusion due to gravity after being overturned.

[0021] In some embodiments, the ratio of the dimension of the part nested in the width direction to the width of the part is 0.2-1.

[0022] In this embodiment, by setting the ratio of the dimension nested in the width direction of the mounting part to the width of the mounting part to 0.2-1, a ratio within this range is appropriate. This can help improve the structural strength of the first box and the bonding strength between the nest and the main body of the first box. To a certain extent, it can also help reduce costs while improving the problem of nest falling off.

[0023] In some embodiments, the ratio of the dimension of the reinforcement in the width direction of the mounting portion to the width of the mounting portion is 0.2-1.

[0024] In this embodiment, by setting the ratio of the dimension of the reinforcing member in the width direction of the mounting part to the width of the mounting part to 0.2-1, a ratio within this range is appropriate. This can help improve the structural strength of the first box and the bonding strength between the nest and the main body of the first box. To a certain extent, it can also help reduce costs while improving the problem of nest falling off.

[0025] In some embodiments, the distance between the connecting hole and the main body is 4mm-50mm.

[0026] In this embodiment, by setting the distance between the connecting hole and the main body to 4mm-50mm, this appropriate distance not only improves the sealing performance of the first and second housings but also reduces the space occupied by the mounting part, thereby improving the structural compactness of the battery device.

[0027] In some embodiments, the reinforcement has a dimension of 4mm-60mm in the width direction of the mounting portion.

[0028] In this embodiment, by setting the dimension of the reinforcing member in the width direction of the mounting part to 4mm-60mm, the appropriate distance within this range is beneficial to improving the reinforcing effect of the reinforcing member on the first box body, improving the bonding strength between the nest and the first box body, and also to reducing costs.

[0029] In some embodiments, the reinforcing plate is parallel to the mounting portion.

[0030] In this embodiment, by setting the reinforcing plate and the mounting part to be parallel, it is further beneficial to improve the rigidity of the mounting part. By utilizing the strength of the reinforcing member itself, the outer contour of the mounting part is well constrained, which is further beneficial to reduce the outward deformation of the mounting part and the degree of outward protrusion affected by gravity after the inverted buckle.

[0031] In some embodiments, the reinforcing plate is disposed at the middle of the mounting portion in the height direction of the housing assembly.

[0032] In this embodiment, by placing a reinforcing plate in the middle of the mounting part in the height direction of the housing assembly, the rigidity of the mounting part is further improved. The strength of the reinforcing member itself provides good constraint on the outer contour of the mounting part, which further helps to reduce the outward deformation of the mounting part and the degree of outward protrusion under the influence of gravity after being overturned.

[0033] In some embodiments, the second housing includes a second housing body and a reinforcing member, the reinforcing member being embedded in the second housing body, and the connecting member passing through the connecting holes of the first housing and the second housing body, connecting the first housing and the second housing.

[0034] In this embodiment, both the first and second housings are reinforced with reinforcing members embedded in the first and second housing bodies. The reinforcing members include nested parts that pass through mounting holes. This mitigates the potential for wear and crushing of the mounting holes in the first and second housing bodies, thereby improving the structural strength, sealing performance, and reliability of the first and second housings. Secondly, the reinforcing members are embedded in the first and second housing bodies via reinforcing plates. This improves the structural strength of the first housing, reduces the risk of airtight failure due to creep deformation, and enhances the bonding strength between the nested parts and the first and second housing bodies, mitigating the risk of nested parts detaching and thus improving the reliability of the first and second housings.

[0035] A second aspect of this application provides a housing assembly, which is the housing assembly of the battery device described above, and the housing assembly is used to house the battery cell assembly.

[0036] The housing assembly provided in this application provides protection for the battery cell assembly. Firstly, by providing a reinforcing member embedded in the first housing body, the reinforcing member includes a nest that passes through a mounting hole. This mitigates the problem of potential wear and crushing of the mounting hole in the first housing, thereby improving the structural strength, sealing performance, and reliability of the first housing. Secondly, the reinforcing member is embedded in the first housing body via a reinforcing plate. This improves the structural strength of the first housing, reduces the risk of airtight failure due to creep deformation, and also enhances the bonding strength between the nest and the first housing body, mitigating the problem of nest detachment and thus improving the reliability of the first housing.

[0037] A third aspect of this application provides an energy storage device including a plurality of battery devices as described above, the battery devices being used to store or provide electrical energy.

[0038] The battery device of the energy storage device provided in this application embodiment includes a housing assembly and a battery cell assembly. The battery cell assembly is disposed within the housing assembly, and the housing assembly protects the battery cell assembly. Firstly, by providing a reinforcing member embedded in the first housing body, the reinforcing member includes a nesting element that passes through a mounting hole. This improves the problem of potential wear and crushing of the mounting hole in the first housing body, thereby enhancing the structural strength, sealing performance, and reliability of the first housing body. Secondly, the reinforcing member is embedded in the first housing body via a reinforcing plate. This improves the structural strength of the first housing body, reduces the risk of airtight failure due to creep deformation, and also enhances the bonding strength between the nesting element and the first housing body, mitigating the problem of nesting element detachment to some extent, thus improving the reliability of the first housing body.

[0039] A fourth aspect of this application provides an electrical device including a plurality of battery devices as described above, the battery devices being used to store or provide electrical energy.

[0040] The battery device of the electrical device provided in this application embodiment includes a housing assembly and a battery cell assembly. The battery cell assembly is disposed within the housing assembly, and the housing assembly protects the battery cell assembly. Firstly, by providing a reinforcing member embedded in the first housing body, the reinforcing member includes a nesting element that passes through a mounting hole. This improves the problem of potential wear and crushing of the mounting hole in the first housing body, thereby enhancing the structural strength, sealing performance, and reliability of the first housing body. Secondly, the reinforcing member is embedded in the first housing body via a reinforcing plate. This improves the structural strength of the first housing body, reduces the risk of airtight failure due to creep deformation, and also enhances the bonding strength between the nesting element and the first housing body, mitigating the problem of nesting element detachment to some extent, thus improving the reliability of the first housing body. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0042] Figure 2 An exploded view of a battery device provided in an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of the structure of the first housing provided in an embodiment of this application;

[0044] Figure 4 This is a structural schematic diagram of the first box body from another perspective, provided as an embodiment of this application;

[0045] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0046] Figure 6 This is a schematic diagram of the structure of the reinforcing member provided in the first embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the structure of the reinforcing member provided in the second embodiment of this application;

[0048] Figure 8 This is a schematic diagram of the structure of the reinforcing member provided in the third embodiment of this application;

[0049] Figure 9 This is a structural schematic diagram of the reinforcing member provided in the fourth embodiment of this application.

[0050] Explanation of reference numerals in the attached figures

[0051] 10. Battery cell assembly; 20. Housing assembly; 21. First housing; 211. First housing body; 2111. Main body; 2112. Mounting part; 2113. Mounting hole; 212. Reinforcing member; 2121. Reinforcing plate; 2122. Nesting; 2123. Connecting hole; 22. Second housing; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0052] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0053] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0054] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0055] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0056] As an example, a single battery cell can also be called a battery cell.

[0057] 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.

[0058] 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.

[0059] In some embodiments, the positive electrode may 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.

[0060] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0061] 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.).

[0062] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0063] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0064] 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.).

[0065] 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.

[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 electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0068] 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.

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

[0070] In some embodiments, the battery cell 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] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0072] 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.

[0073] 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.

[0074] 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. This application does not have any particular limitations.

[0075] 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.

[0076] 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.

[0077] During the production of battery devices, the casing needs to have good sealing performance and structural strength. At least part of the casing structure is injection molded. During the fastening process, the fastening holes of the injection molded parts are prone to wear and crushing. In related technologies, additional nesting is added to the fastening holes to prevent bolt wear and crushing, but the nesting is prone to falling off. Furthermore, under high temperature and high humidity conditions, structural creep deformation may occur, which can easily lead to airtightness failure.

[0078] In view of this, to improve the problem of nesting falling off, this application provides a battery device. The battery device includes a battery cell assembly and a housing assembly. The battery cell assembly is disposed within the housing assembly. The housing assembly includes a first housing, a second housing, and a connector. The first housing includes a first housing body and a reinforcing member. The first housing body has a mounting hole. The reinforcing member includes a reinforcing plate and a nest, the nest being connected to the reinforcing plate. The reinforcing member is embedded in the first housing body through the reinforcing plate, and the nest passes through the mounting hole. The nest has a connecting hole, and the connector passes through the connecting hole, connecting the first housing and the second housing.

[0079] The battery device provided in this application includes a housing assembly and battery cell assemblies. The battery cell assemblies are disposed within the housing assembly, and the housing assembly protects the battery cell assemblies. Firstly, by providing a reinforcing member embedded in the first housing body, the reinforcing member includes a nesting element that passes through a mounting hole. This improves the structural strength, sealing performance, and reliability of the first housing body by mitigating the potential for wear and crushing of the mounting hole. Secondly, the reinforcing member is embedded in the first housing body via a reinforcing plate. This improves the structural strength of the first housing body, reduces the risk of airtight failure due to creep deformation, and enhances the bonding strength between the nesting element and the first housing body, thus mitigating the problem of nesting element detachment and improving the reliability of the first housing body.

[0080] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0081] Please refer to Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0082] This application provides an energy storage device, including a plurality of battery devices according to any embodiment of this application, the battery devices being used to store or provide electrical energy.

[0083] 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, an energy storage device 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.

[0084] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0085] Please refer to Figures 2 to 9 This application provides a battery device 100. The battery device 100 includes a battery cell assembly 10 and a housing assembly 20. The battery cell assembly 10 is disposed within the housing assembly 20. The housing assembly 20 includes a first housing 21, a second housing 22, and a connector. The first housing 21 includes a first housing body 211 and a reinforcing member 212. The first housing body 211 has a mounting hole 2113. The reinforcing member 212 includes a reinforcing plate 2121 and a nest 2122, the nest 2122 being connected to the reinforcing plate 2121. The reinforcing member 212 is embedded in the first housing body 211 via the reinforcing plate 2121, and the nest 2122 passes through the mounting hole 2113. The nest 2122 has a connecting hole 2123, through which the connector passes, connecting the first housing 21 and the second housing 22.

[0086] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells, which are connected in series, parallel, or mixed connection via a busbar.

[0087] In some embodiments, the battery cell assembly 10 is typically formed by arranging multiple battery cells.

[0088] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells together with cable ties.

[0089] In some embodiments, the battery device 100 may be a battery pack, which includes a housing assembly 20 and one or more individual battery cell assemblies 10, the individual battery cell assemblies 10 being housed within the housing assembly 20.

[0090] As an example, the battery cell assembly 10 can be a battery module, which can be housed in the housing assembly 20 by fixing the battery module in the housing assembly 20.

[0091] As an example, the battery cell assembly 10 can also be housed in the housing assembly 20 by directly fixing multiple battery cells to the housing assembly 20.

[0092] For example, please refer to Figure 2 and Figure 3 The housing assembly 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together to form a closed space inside the housing assembly 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 21 may be an upper cover or a lower housing. In this embodiment, the first housing 21 is described as an upper cover.

[0093] In some embodiments, the housing assembly 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing assembly 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing assembly 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0094] Please see Figures 2 to 3 The first housing 21 and / or the second housing 22 are generally in the shape of a cover, so that a receiving cavity is defined between the first housing 21 and the second housing 22, the receiving cavity being used to receive at least the battery cell assembly 10.

[0095] Here, the nest 2122 and the reinforcing plate 2121 can be an integral structure, which helps to reduce the number of parts and improves the overall integrity between the nest 2122 and the reinforcing plate 2121, thus improving the structural strength.

[0096] Of course, the nest 2122 and the reinforcing plate 2121 can also be a separate structure, for example, connected by welding. The separate structure of the nest 2122 and the reinforcing plate 2121 is more conducive to forming the required shape.

[0097] In some embodiments, the first housing 21 and the second housing 22 are fastened together. For example, the connecting element is a bolt, screw, or pin.

[0098] In practical applications, the nest 2122 can be provided with internal threads on the inner wall of the connecting hole 2123 to connect with screws or bolts, as required.

[0099] Please see here. Figure 5 The nest 2122 passes through the mounting hole 2113, and the connector passes through the connecting hole 2123, connecting the first box 21 and the second box 22. That is to say, the connector is in direct contact with the nest 2122. The nest 2122 helps to improve the stress situation of the first box body 211 and is used to improve the problem that the mounting hole 2113 of the first box 21 may be worn and crushed by the connector.

[0100] Please see here. Figure 5The reinforcing member 212 is embedded in the first box body 211 through the reinforcing plate 2121. The setting of the reinforcing plate 2121 is beneficial to improving the structural strength of the first box body 21 and to increasing the contact area between the reinforcing member 212 and the first box body 211, thereby improving the bonding strength between the nest 2122 and the first box body 211, thus improving the problem of the nest 2122 falling off.

[0101] It should be noted that the specific shape of the reinforcing plate 2121 is not limited here. Please refer to [link / reference]. Figures 6 to 9 The reinforcing plate 2121 can be, for example, square (see...). Figure 7 Polygons, elongated shapes (see...) Figure 8 and Figure 9 Or oval (see Figure 6 )wait.

[0102] The battery device 100 of the energy storage device provided in this application embodiment includes a housing assembly 20 and a battery cell assembly 10. The battery cell assembly 10 is disposed within the housing assembly 20, and the housing assembly 20 protects the battery cell assembly 10. Firstly, by providing a reinforcing member 212, which is embedded in the first housing body 211, the reinforcing member 212 includes a nest 2122 that passes through a mounting hole 2113. This improves the problem of the mounting hole 2113 of the first housing 21 potentially being worn and crushed, thereby improving the structural strength, sealing performance, and reliability of the first housing 21. Secondly, the reinforcing member 212 is embedded in the first housing body 211 via a reinforcing plate 2121. This helps to improve the structural strength of the first housing 21, reduces the risk of airtight failure due to creep deformation, and also improves the bonding strength between the nest 2122 and the first housing body 211, thus mitigating the problem of the nest 2122 detaching and improving the reliability of the first housing 21.

[0103] In some embodiments, please refer to Figures 4 to 5 The first box body 211 is constructed by injection molding on the reinforcing member 212.

[0104] For example, the pre-formed reinforcing member 212 can be placed into the mold of the first box body 211, and then the injection molding material of the first box body 211 can be injected into the mold to integrally form the first box body 211. This helps to improve the bonding strength between the first box body 211 and the reinforcing member 212, thereby further improving the structural strength of the first box body 21 and further reducing the risk of airtight failure due to creep deformation of the first box body 21. In addition, it further improves the bonding strength between the nest 2122 and the first box body 211, which can further improve the problem of nest 2122 falling off, thereby further improving the reliability of the first box body 21. Furthermore, it also helps to reduce the number of parts that need to be assembled, thereby improving assembly efficiency.

[0105] Of course, in other embodiments, the reinforcing member 212 may be embedded into the interior of the first box body 211 after the first box body 211 has been formed.

[0106] In some embodiments, the reinforcing member 212 is a composite material structure or a metal structure.

[0107] Here, composite material structures are, for example, composite structures made of fiber-reinforced materials and resins. Composite material structures have high strength and resistance to deformation.

[0108] In embodiments where the reinforcing member 212 is a metal structure, it possesses high strength. Exemplarily, it includes, but is not limited to, carbon steel, aluminum alloy, etc.

[0109] In this embodiment, by setting the reinforcing member 212 as a composite material structure or a metal structure, the reinforcing member 212 can have high strength. This helps to improve the problem that the mounting hole 2113 of the first housing 21 may be worn and crushed, and can improve the structural strength, sealing performance and reliability of the first housing 21.

[0110] It should be noted that the specific number of reinforcing parts 212 is not limited here. There can be one or more.

[0111] In the embodiments of this application, "multiple" refers to two or more items.

[0112] In some embodiments, please refer to Figure 5 One or more nested parts 2122 are provided on the reinforcing member 212.

[0113] In an embodiment where a nest 2122 is provided on the reinforcing member 212, the reinforcing plate 2121 and the nest 2122 can correspond one-to-one, which is beneficial to improving the versatility and flexibility of the reinforcing member 212.

[0114] In embodiments where multiple nests 2122 are provided on the reinforcing member 212, one reinforcing plate 2121 may correspond to multiple nests 2122. This helps to reduce the number of reinforcing members 212, thereby facilitating the forming between the reinforcing member 212 and the first box body 211.

[0115] In some embodiments, please refer to Figures 4 to 5 When projected onto a plane parallel to the reinforcing plate 2121, the ratio between the projected area of ​​the reinforcing member 212 and the projected area of ​​the nest 2122 is greater than 1 and less than or equal to 20.

[0116] The ratio between the projected area of ​​the reinforcing member 212 and the projected area of ​​the nest 2122 can be any one of 1.01, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 or any value between the two.

[0117] In this embodiment, by setting the ratio between the projected area of ​​the reinforcing member 212 and the projected area of ​​the nest 2122 to be greater than 1 and less than or equal to 20, an appropriate ratio within this range can help improve the structural strength of the first box 21, improve the bonding strength between the nest 2122 and the first box body 211, and to a certain extent improve the problem of the nest 2122 falling off. In addition, it can also reduce costs.

[0118] In some embodiments, please refer to Figures 4 to 5 The first box body 211 includes a main body 2111 and a mounting part 2112. At least a portion of the outer side wall of the main body 2111 protrudes to form the mounting part 2112. The mounting part 2112 forms a mounting hole 2113. The reinforcing member 212 is embedded in the mounting part 2112.

[0119] Here, the main body 2111 is the main structure of the first box body 211, and the main body 2111 and the second box 22 together define a receiving cavity for accommodating the battery cell assembly 10.

[0120] Here, the mounting part 2112 is mainly used for connecting and sealing with the second housing 22.

[0121] The mounting portion 2112 may be formed by at least a portion of the outer side wall of the main body 2111 protruding. Alternatively, the mounting portion 2112 may be formed by a portion of the outer side wall of the main body 2111, or the mounting portion 2112 may be formed by all the outer side walls of the main body 2111. That is, the main body 2111 may have a mounting portion 2112 at one end.

[0122] For example, the mounting part 2112 is a flange face, which facilitates the sealing and connection between the first housing 21 and the second housing 22 through the flange face.

[0123] In this embodiment, by embedding the reinforcing member 212 into the mounting part 2112, the rigidity of the mounting part 2112 is improved. At the same time, the strength of the reinforcing member 212 itself provides good constraint on the outer contour of the mounting part 2112, which helps to reduce the outward deformation of the mounting part 2112 and the degree of outward protrusion affected by gravity after being overturned.

[0124] In some embodiments, please refer to Figures 4 to 5 The ratio of the dimension of the nested part 2122 in the width direction to the width of the mounting part 2112 is 0.2-1.

[0125] here, Figure 5 The direction indicated by X is the width direction of the mounting part 2112.

[0126] The ratio of the dimension of the nested part 2122 in the width direction of the mounting part 2112 to the width of the mounting part 2112 can be any one of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 or any value between the two.

[0127] Here, the larger the dimension of the nested part 2122 in the width direction of the mounting part 2112, the larger the ratio of the dimension of the nested part 2122 in the width direction of the mounting part 2112 to the width of the mounting part 2112. When the ratio of the dimension of the nested part 2122 in the width direction of the mounting part 2112 to the width of the mounting part 2112 is 1, that is, the dimension of the nested part 2122 in the width direction of the mounting part 2112 is equal to the width of the mounting part 2112.

[0128] In this embodiment, by setting the ratio of the dimension of the nest 2122 in the width direction of the mounting portion 2112 to the width of the mounting portion 2112 to 0.2-1, a ratio within this range is appropriate. This can help improve the structural strength of the first box 21 and the bonding strength between the nest 2122 and the first box body 211. To a certain extent, this can improve the problem of the nest 2122 falling off, while also helping to reduce costs.

[0129] In some embodiments, please continue reading Figures 4 to 5 The ratio of the dimension of the reinforcing member 212 in the width direction of the mounting portion 2112 to the width of the mounting portion 2112 is 0.2-1.

[0130] The ratio of the dimension of the reinforcing member 212 in the width direction of the mounting portion 2112 to the width of the mounting portion 2112 can be any one of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 or any value between the two.

[0131] In this embodiment, by setting the ratio of the dimension of the reinforcing member 212 in the width direction of the mounting portion 2112 to the width of the mounting portion 2112 to 0.2-1, an appropriate ratio within this range can improve the structural strength of the first box 21 and the bonding strength between the nest 2122 and the first box body 211. This can improve the problem of the nest 2122 falling off to a certain extent, while also helping to reduce costs.

[0132] In some embodiments, please refer to Figures 4 to 5 The distance between the connecting hole 2123 and the main body 2111 is 4mm-50mm.

[0133] The distance between the connecting hole 2123 and the main body 2111 can be any one of 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 43mm, 45mm, 47mm, or 50mm, or any value between two of them.

[0134] It is understandable that the greater the distance between the connecting hole 2123 and the main body 2111, the greater the distance between the area of ​​the mounting part 2112 without openings in the width direction and the main body 2111, which is more conducive to sealing.

[0135] In this embodiment, by setting the distance between the connection hole 2123 and the main body 2111 to 4mm-50mm, the appropriate distance within this range is beneficial to improving the sealing performance of the first housing 21 and the second housing 22, while also reducing the space occupied by the mounting part 2112, thereby improving the structural compactness of the battery device 100.

[0136] In some embodiments, please continue reading Figures 4 to 5 The dimension of the reinforcing member 212 in the width direction of the mounting part 2112 is 4mm-60mm.

[0137] The dimension of the reinforcing member 212 in the width direction of the mounting part 2112 can be any one of 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 15mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 43mm, 45mm, 47mm, 50mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 60mm or any combination thereof.

[0138] It is understandable that the larger the dimension of the reinforcing member 212 in the width direction of the mounting part 2112, the better the reinforcing effect of the reinforcing member 212 on the first box body 211, and the more conducive it is to improving the bonding strength between the nest 2122 and the first box body 211.

[0139] In this embodiment, by setting the dimension of the reinforcing member 212 in the width direction of the mounting portion 2112 to 4mm-60mm, the appropriate distance within this range is beneficial to improving the reinforcing effect of the reinforcing member 212 on the first box body 211, improving the bonding strength between the nest 2122 and the first box body 211, and also to reducing costs.

[0140] In some embodiments, please continue reading Figures 4 to 5 The reinforcing plate 2121 is parallel to the mounting part 2112.

[0141] In other words, the plane where the reinforcing plate 2121 is located is parallel to the plane where the mounting part 2112 is located.

[0142] Here, "the reinforcing plate 2121 is parallel to the mounting part 2112" means that the reinforcing plate 2121 is completely parallel or approximately parallel to the mounting part 2112.

[0143] Considering the tolerances that exist during the production process, optionally, the dimensions within the range of ±1°, ±2°, ±3°, ±4°, and ±5° between the plane where the reinforcing plate 2121 is located and the plane where the mounting part 2112 is located can be regarded as the dimensions within the tolerance range.

[0144] In this embodiment, by setting the reinforcing plate 2121 and the mounting part 2112 to be parallel, it is further beneficial to improve the rigidity of the mounting part 2112. By utilizing the strength of the reinforcing member 212 itself, the outer contour of the mounting part 2112 is well constrained, which is further beneficial to reduce the outward deformation of the mounting part 2112 and the degree of outward protrusion affected by gravity after being overturned.

[0145] In some embodiments, please continue reading Figures 4 to 5 In the height direction of the housing assembly 20, the reinforcing plate 2121 is disposed in the middle of the mounting part 2112.

[0146] Here, "the reinforcing plate 2121 is located in the middle of the mounting part 2112" means that the reinforcing plate 2121 is located in the middle or approximately in the middle of the mounting part 2112.

[0147] In this embodiment, by placing the reinforcing plate 2121 in the middle of the mounting part 2112 in the height direction of the housing assembly 20, it is further beneficial to improve the rigidity of the mounting part 2112. The strength of the reinforcing member 212 itself provides good constraint on the outer contour of the mounting part 2112, which is further beneficial to reduce the outward deformation of the mounting part 2112 and the degree of outward protrusion affected by gravity after being overturned.

[0148] In some embodiments, the second housing 22 includes a second housing body and a reinforcing member 212. The reinforcing member 212 is embedded in the second housing body, and the connector passes through the connecting hole 2123 of the first housing 21 and the second housing 22, connecting the first housing 21 and the second housing 22.

[0149] Here, the reinforcing member 212 of the second housing 22 may be the same as or different from the reinforcing member 212 of the first housing 21, but both have the function of the reinforcing member 212. The beneficial effects of the reinforcing member 212 on the second housing 22 are the same as those on the first housing 21, and will not be repeated here.

[0150] In this embodiment, both the first housing 21 and the second housing 22 are reinforced with reinforcing members 212. The reinforcing members 212 are embedded in the first housing body 211 and the second housing body, and each reinforcing member 212 includes a nest 2122 that passes through a mounting hole 2113. This reinforcement improves the structural strength, sealing performance, and reliability of the first housing 21 and the second housing body, mitigating the potential wear and crushing of the mounting holes 2113. Secondly, the reinforcing members 212 are embedded in the first housing body 211 and the second housing body via reinforcing plates 2121. This improves the structural strength of the first housing 21, reducing the risk of airtight failure due to creep deformation. Furthermore, it enhances the bonding strength between the nest 2122 and the first housing body 211 and the second housing body, mitigating the risk of the nest 2122 detaching and thus improving the reliability of the first housing 21 and the second housing body.

[0151] It should be noted that the projected area of ​​the reinforcing member 212, the projected area of ​​the nest 2122, the dimension of the nest 2122 in the width direction of the mounting part 2112, and the dimension of the reinforcing member 212 in the width direction of the mounting part 2112 can all be measured by vernier calipers before the reinforcing member 212 and the first box body 211 are integrally formed; the distance between the connecting hole 2123 and the main body 2111, and the width of the mounting part 2112 can be measured by vernier calipers after the reinforcing member 212 and the first box body 211 are integrally formed; it should be noted that all the above measurements can be performed at room temperature and pressure.

[0152] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, include: Enclosure assembly; A battery cell assembly, wherein the battery cell assembly is disposed within the housing assembly; The enclosure assembly includes a first enclosure, a second enclosure, and a connector. The first enclosure includes: The first box body is provided with mounting holes; The reinforcing member includes a reinforcing plate and a nest, the nest being connected to the reinforcing plate. The reinforcing member is embedded in the first box body through the reinforcing plate, and the nest is inserted through the mounting hole. The nest is provided with a connecting hole, and a connecting member is inserted through the connecting hole to connect the first box body and the second box body.

2. The battery device according to claim 1, characterized in that, The main body of the first box is formed by injection molding on the reinforcing member.

3. The battery device according to claim 1, characterized in that, The reinforcing member is a composite material structure or a metal structure.

4. The battery device according to claim 1, characterized in that, When projected onto a plane parallel to the reinforcing plate, the ratio between the projected area of ​​the reinforcing member and the projected area of ​​the nested member is greater than 1 and less than or equal to 20.

5. The battery device according to claim 1, characterized in that, The reinforcing member is provided with one or more of the aforementioned nesting structures.

6. The battery device according to any one of claims 1-5, characterized in that, The first box body includes a main body and a mounting part. At least a portion of the outer side wall of the main body protrudes to form the mounting part, the mounting part forms the mounting hole, and the reinforcing member is embedded in the mounting part.

7. The battery device according to claim 6, characterized in that, The ratio of the dimension nested in the width direction of the mounting part to the width of the mounting part is 0.2-1.

8. The battery device according to claim 6, characterized in that, The ratio of the dimension of the reinforcing member in the width direction of the mounting portion to the width of the mounting portion is 0.2-1.

9. The battery device according to claim 6, characterized in that, The distance between the connecting hole and the main body is 4mm-50mm.

10. The battery device according to claim 6, characterized in that, The reinforcing member has a width of 4mm-60mm in the mounting section.

11. The battery device according to claim 6, characterized in that, The reinforcing plate is parallel to the mounting portion.

12. The battery device according to any one of claims 1-5, characterized in that, In the height direction of the housing assembly, the reinforcing plate is disposed in the middle of the mounting portion.

13. The battery device according to any one of claims 1-5, characterized in that, The second box includes a second box body and a reinforcing member. The reinforcing member is embedded in the second box body, and the connecting member passes through the connecting hole of the first box and the second box, connecting the first box and the second box.

14. A housing assembly, characterized in that, The housing assembly is the housing assembly of the battery device according to any one of claims 1-13, and the housing assembly is used to house the battery cell assembly.

15. An energy storage device, characterized in that, It includes a plurality of battery devices according to any one of claims 1-13, the battery devices being used to store or provide electrical energy.

16. An electrical appliance, characterized in that, It includes a plurality of battery devices according to any one of claims 1-13, the battery devices being used to store or provide electrical energy.

Images