Bolt assembly, battery device and electric equipment

Abstract

The utility model discloses a bolt assembly, a battery device and electric equipment. The battery device comprises a box body and the bolt assembly. The box body comprises a first box body part and a second box body part, and the first box body part and the second box body part jointly define a containing space for containing the battery monomers. The bolt assembly is used for connecting the first box body part and the second box body part. The bolt assembly comprises a screw rod, a flange part and a sealing piece, and the screw rod penetrates through the first box body part and the second box body part. The flange part is connected to one end of the screw and arranged on the side, away from the second box body part, of the first box body part, and the sealing piece is arranged between the flange part and the first box body part. A convex ring is arranged on the surface, facing the first box body part, of the flange part and arranged in the circumferential direction of the flange part in a surrounding mode, and the sealing piece is located in the convex ring. According to the technical scheme provided by the invention, the connection sealing performance between the bolt and the part is improved, and the operation stability of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a bolt assembly, a battery device, and an electrical appliance. Background Technology

[0002] Batteries are widely used in various electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy airplanes, electric toy ships, power tools, and energy storage systems, etc.

[0003] Batteries contain a variety of components, which are usually connected by bolts. However, poor sealing between components and bolts allows impurities to enter between components, reducing the stability of battery operation. Utility Model Content

[0004] In view of the above problems, this application provides a bolt assembly, a battery device, and an electrical device, which improves the sealing performance of the connection between the bolt and the components and improves the operational stability of the battery device.

[0005] In a first aspect, this application provides a battery device, including a housing and a bolt assembly. The housing includes a first housing portion and a second housing portion, which together enclose a receiving space for accommodating a single battery cell. The bolt assembly is used to connect the first housing portion and the second housing portion. The bolt assembly includes a bolt, a flange, and a seal. The flange has a protrusion on its surface facing the first housing portion, and the seal is disposed between the protrusion and the bolt.

[0006] In the technical solution of this application embodiment, the housing is configured as a first housing section and a second housing section that enclose each other to accommodate individual battery cells and provide a stable operating environment for the battery cells. A bolt assembly is used to connect the first housing section and the second housing section, improving the connection strength between them. A protruding mechanism is provided on the outside of the seal to reduce the risk of seal movement, improve the sealing performance of the housing, and thus improve the operational stability of the battery cells.

[0007] In some embodiments, the protrusion is arranged circumferentially around the flange to form a raised ring, and the seal is located inside the raised ring. The above structure, with the raised ring surrounding the seal circumferentially, confines the seal within the raised ring, reducing the risk of seal failure due to seal movement and further improving the sealing performance of the enclosure.

[0008] In some embodiments, a screw passes through both the first housing portion and the second housing portion, a flange is connected to one end of the screw and located on the side of the first housing portion opposite to the second housing portion, and a seal is located between the flange and the first housing portion. In the above structure, the screw connects the first housing portion and the second housing portion, the flange limits the screw, and reduces the risk of the screw falling off the housing. Furthermore, the seal between the flange and the first housing portion reduces the risk of moisture or other impurities entering the housing through the gap between the flange and the first housing portion, thus improving the sealing performance of the housing.

[0009] In some embodiments, at least a portion of the convex ring abuts against the first housing portion. In the above structure, the abutment between the convex ring and the first housing portion forms a closed space, restricting the displacement of the seal and reducing the risk of seal failure due to seal displacement.

[0010] In some embodiments, the flange and the convex ring are integrally formed. This structure improves the assembly efficiency and accuracy of the bolt assembly.

[0011] In some embodiments, the cross-sectional area of ​​the convex ring gradually decreases along the direction from the flange portion toward the first housing portion. In the above structure, an uneven end face is formed on the side of the convex ring facing the first housing portion, allowing the convex ring to form good hard contact with the surface of the first housing portion. This prevents a decrease in torque and axial force, improves the stability of the connection, and further enhances the limiting effect on the seal, preventing leakage of sealing material.

[0012] In some embodiments, the seal includes any one of acrylate sealing rings, nitrile rubber sealing rings, fluororubber sealing rings, polyurethane sealing rings, and polytetrafluoroethylene sealing rings. The above materials possess good sealing performance, as well as certain elasticity and corrosion resistance, effectively improving the sealing performance between the bolt assembly and the housing.

[0013] In some embodiments, the bolt assembly further includes a head connected to the side of the flange opposite to the bolt, and the head is used to connect a fastening tool. In the above structure, by providing a head, it is easier to connect the bolt to tools such as wrenches and electric wrenches, thereby improving the assembly efficiency of the bolt assembly.

[0014] In some embodiments, the bolt assembly further includes an insulating layer comprising a first insulating portion and a second insulating portion. The first insulating portion covers the head, and the second insulating portion covers the flange portion on the side facing away from the first housing portion, and the second insulating portion is connected to the first insulating portion. The insulating layer protects the bolt assembly from corrosion, wear, and other environmental factors, thereby extending its service life and reliability.

[0015] In some embodiments, the second insulating portion extends to the periphery of the flange portion. By providing an insulating layer, the insulation performance of the bolt assembly can be improved, reducing the risk of short circuits in the connection assembly.

[0016] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0017] Thirdly, this application provides a bolt assembly for connecting a first connecting portion and a second connecting portion. The bolt assembly includes a bolt, a flange, and a seal. The bolt passes through both the first and second connecting portions, and the flange is connected to one end of the bolt, located on the side of the first connecting portion opposite to the second connecting portion. The seal is located between the flange and the first connecting portion. Specifically, the surface of the flange facing the first connecting portion has a protrusion, and the seal is located between the protrusion and the bolt.

[0018] In the above structure, the screw connects the first and second connecting parts, and the flange limits the screw, reducing the risk of it detaching from the housing. A seal is provided between the flange and the first connecting part to reduce the risk of moisture or other impurities entering the equipment through the gap between them. A protrusion on the flange restricts the outward movement of the sealing part, reducing the risk of leakage caused by a gap forming between the sealing part and the screw, and improving the sealing performance between the first and second connecting parts.

[0019] In some embodiments, a raised ring is formed by circumferentially surrounding the flange portion, and the seal is located within the raised ring, with at least a portion of the raised ring abutting against the first connecting portion. Providing a circumferentially surrounding raised ring outside the seal confines the seal within the raised ring, reducing the risk of seal movement and failure, and improving the sealing performance between the first and second connecting portions.

[0020] In some embodiments, the bolt assembly further includes a head connected to the side of the flange facing away from the threaded rod. The head is used to connect a fastening tool. The bolt assembly also includes an insulating layer comprising a first insulating portion and a second insulating portion. The first insulating portion covers the head. The second insulating portion covers the surface of the flange facing away from the first connecting portion and is connected to the first insulating portion. This structure, by providing an insulating layer, improves the insulation performance of the bolt assembly and enhances the safety of equipment operation.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. Attached Figure Description

[0022] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of a vehicle according to one embodiment of this application;

[0024] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0025] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the structure of a bolt assembly provided in some embodiments of this application;

[0027] Figure 5 This application provides cross-sectional structural schematic diagrams of bolt assemblies for some embodiments;

[0028] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of part A.

[0029] Detailed Explanation of Reference Numerals

[0030] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 5. Housing; 51. First housing section; 52. Second housing section; 6. Battery cell; 10. Electrode assembly; 20. Housing; 24. Pressure relief mechanism; 25. Electrode terminal; 30. End cap; 40. Outer shell; 7. Bolt assembly; 701. Screw; 702. Flange section; 703. Seal; 704. Raised ring; 705. Head; 706. Insulating layer; 707. First insulating part; 708. Second insulating part; 709. Protrusion. Detailed Implementation

[0031] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly 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.

[0034] 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.

[0035] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0036] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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.

[0039] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0040] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0041] In battery packs, a housing is used to contain individual battery cells. Due to the large size of the housing, it is usually divided into multiple sections for ease of production, transportation, and installation of the battery cells. Battery cells have very high requirements for their operating environment; impurities or moisture inside the housing can cause short circuits between cells or reduce their lifespan. Therefore, the housing needs to be tightly sealed. The first and second housing sections are typically sealed with bolts, with the bolts sealed internally with nylon adhesive. Under high temperatures, moisture and impurities can react with the nylon adhesive, causing the seal to fail. Alternatively, intersecting gaskets can be used at the bottom of the bolt connections; aging of the rubber material can cause the bolt connections to loosen.

[0042] To address the aforementioned issues, embodiments of this application provide a battery device comprising a first housing section and a second housing section that enclose each other, for housing individual battery cells and providing a stable operating environment for them. A bolt assembly is used to connect the first housing section and the second housing section, increasing the connection strength between them. In the connecting assembly, a screw is used to connect the first housing section and the second housing section, and a flange section limits the screw, reducing the risk of the screw detaching from the housing. Furthermore, a seal is provided between the flange section and the first housing section, reducing the risk of moisture or other impurities entering the housing through the gap between the flange section and the first housing section. Additionally, a circumferentially surrounding convex ring is provided outside the seal, confining the seal within the ring, reducing the risk of seal failure due to seal movement, improving the sealing performance of the housing, and thus improving the operational stability of the individual battery cells.

[0043] The battery apparatus 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 connected in series, parallel, or mixed connections via a busbar.

[0044] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0045] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0046] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0047] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0048] In this embodiment of the application, the battery cell can be a secondary battery cell, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0049] Battery cells may include, but are not limited to, lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-metal hydride battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0050] As an example, the battery cell can be a cylindrical battery cell, a prismatic 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.

[0051] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0052] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0053] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0055] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0056] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0057] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0058] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0059] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application.

[0060] The housing 5 is used to accommodate the battery cell 6, and the housing 5 can have various structures. In some embodiments, the housing 5 may include a first housing portion 51 and a second housing portion 52, which overlap each other, and together define a receiving space 53 for accommodating the battery cell. The first housing portion 51 may be a hollow structure with one end open, and the second housing portion 52 may be a plate-like structure, covering the open side of the first housing portion 51 to form a housing 5 with the receiving space 53; alternatively, both the first housing portion 51 and the second housing portion 52 may be hollow structures with one side open, with the open side of the first housing portion 51 covering the open side of the second housing portion 52 to form a housing 5 with the receiving space 53. Of course, the first housing portion 51 and the second housing portion 52 can be various shapes, such as cylinders, cuboids, etc.

[0061] To improve the sealing performance after the first housing part 51 and the second housing part 52 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 51 and the second housing part 52.

[0062] Assuming that the first box part 51 covers the top of the second box part 52, the first box part 51 can also be called the upper box cover, and the second box part 52 can also be called the lower box.

[0063] In the battery device 2, there can be one or more battery cells 6. If there are multiple battery cells 6, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 6 are connected in both series and parallel. Multiple battery cells 6 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 6 is housed in the housing 5. Alternatively, multiple battery cells can first be connected in series, in parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 5.

[0064] In some alternative embodiments, the battery cell 6 can also be directly housed within the housing 5 to reduce the number of connecting or supporting components required to assemble the battery module and improve the energy density of the battery device 2.

[0065] For example, the battery cell 6 may be the smallest unit that makes up the battery device 2.

[0066] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application.

[0067] like Figure 3 As shown, in some embodiments, the battery cell 6 includes a housing 40 and an electrode assembly 10 housed within the housing 40.

[0068] The electrode assembly 10 includes a positive electrode and a negative electrode. During the charging and discharging process of the battery cell 6, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. Optionally, the electrode assembly 10 also includes a separator disposed between the positive and negative electrodes, which can reduce the risk of short circuit between the positive and negative electrodes while allowing active ions to pass through.

[0069] The housing 40 is used to encapsulate the electrode assembly 10 and electrolyte components. The housing 40 can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite housing 40), or aluminum-plastic film, etc.

[0070] In some embodiments, the housing 40 includes a housing 20 and an end cap 30, the housing 20 having an opening and the end cap 30 for closing the opening.

[0071] In some embodiments, the battery cell 6 further includes an electrolyte housed within the casing 40. The electrolyte acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid.

[0072] In some embodiments, the battery cell 6 includes electrode terminals 25. The electrode terminals 25 are electrically connected to the electrode assembly 10 for outputting or inputting electrical energy into the battery cell 6.

[0073] In some embodiments, the battery cell 6 includes a pressure relief mechanism 24, which is used to rupture when the internal pressure of the battery cell 6 exceeds a threshold, thereby releasing the internal pressure of the battery cell 6. Specifically, the pressure relief mechanism 24 may be an element or component that is actuated when the battery cell 6 reaches a certain condition. Optionally, the housing 40 includes an end cap 30 and a housing 20. The housing 20 has an opening, and the end cap 30 closes to the opening and is sealed to the housing 20.

[0074] Please refer to the reference. Figures 2 to 5 , Figure 2 This is an exploded view of the battery device provided in some embodiments of this application. Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. Figure 4 This is a schematic diagram of the structure of a bolt assembly provided in some embodiments of this application. Figure 5 This is a cross-sectional structural schematic diagram of a bolt assembly provided in some embodiments of this application.

[0075] As shown in the figure, the battery device 2 provided in this embodiment includes a housing 5 and a bolt assembly 7. The housing 5 includes a first housing portion 51 and a second housing portion 52, which together enclose a space for accommodating a single battery cell 6. The bolt assembly 7 is used to connect the first housing portion 51 and the second housing portion 52. The bolt assembly 7 includes a screw 701, a flange portion 702, and a seal 703. The flange portion 702 has a protrusion 709 on its surface facing the first housing portion 51, and the seal 703 is disposed between the protrusion 709 and the screw 701.

[0076] Multiple bolt assemblies 7 can be arranged at circumferential intervals along the housing 5. The screw 701 is a key component connecting the first housing portion 51 and the second housing portion 52. For example, the screw 701 and flange portion 702 are substantially the same as standard bolt components, manufactured using a metal material with sufficient strength. They are readily available and offer high assembly efficiency.

[0077] Optionally, the seal 703 can be made of rubber or a material with certain deformation properties and heat and corrosion resistance. The protrusion 709 limits the seal 703, reducing the risk of airtight failure caused by movement of the seal 703.

[0078] In the technical solution of this application embodiment, the housing 5 is configured as a first housing portion 51 and a second housing portion 52 that enclose each other to accommodate the battery cell 6 and provide a stable operating environment for the battery cell 6. A bolt assembly 7 is used to connect the first housing portion 51 and the second housing portion 52, improving the connection strength between them. In the connection assembly, a screw 701 is used to connect the first housing portion 51 and the second housing portion 52, and a flange portion 702 limits the screw 701, reducing the risk of the screw 701 falling off the housing 5. Furthermore, a seal 703 is provided between the flange portion 702 and the first housing portion 51 to reduce the risk of moisture or other impurities entering the housing 5 through the gap between the flange portion 702 and the first housing portion 51, improving the sealing performance of the housing 5 and thus improving the operational stability of the battery cell 6.

[0079] In some embodiments of this application, a protrusion 709 is arranged circumferentially around the flange portion 702 to form a raised ring 704, and the seal 703 is located within the raised ring 704. The raised ring 704 is disposed on the surface of the flange portion 702 facing the first housing portion 51, and the raised ring 704 can be a steel ring or iron ring connected to the flange portion 702. Due to the presence of the raised ring 704, even if the seal 703 ages or deforms, it can still be confined within the raised ring 704 to seal between the first housing portion 51 and the flange portion 702. By providing a circumferentially surrounding raised ring 704 around the seal 703 and confining the seal 703 within the raised ring 704, the risk of seal failure due to movement of the seal 703 is reduced.

[0080] In some embodiments of this application, the screw 701 passes through the first housing portion 51 and the second housing portion 52. The flange portion 702 is connected to one end of the screw 701 and is located on the side of the first housing portion 51 opposite to the second housing portion 52. The seal 703 is located between the flange portion 702 and the first housing portion 51.

[0081] A screw 701 passes through both housing sections and is secured by tightening a nut or bolt. A flange 702 is connected to one end of the screw 701 and is located on the side of the first housing section 51 opposite to the second housing section 52. Its main function is to restrict the movement of the screw 701 and prevent it from falling off the housing 5. A seal 703 is provided between the flange 702 and the first housing section 51, and its main purpose is to prevent moisture or other impurities from entering the housing 5 through the gap between the flange 702 and the first housing section 51, thereby improving the dryness and cleanliness of the internal environment of the battery device 2.

[0082] In some embodiments of this application, at least a portion of the convex ring 704 abuts against the first housing portion 51. Through the abutment design between the convex ring 704 and the first housing portion 51, the displacement of the seal 703 is effectively limited, thereby improving the sealing reliability of the housing 5. This reduces the entry of moisture, dust, and other impurities into the battery, protecting the battery cells 6 from damage. The convex ring 704 not only limits the displacement of the seal 703 but also enhances the structural stability of the housing 5. Together with the flange portion 702 and the first housing portion 51, it forms a robust whole, improving the overall structural strength of the battery device 2.

[0083] In some embodiments of this application, the flange 702 and the convex ring 704 are integrally formed. Since the flange 702 and the convex ring 704 are integrally formed, there are no additional connecting parts or interfaces between them. This simplifies the assembly process, reduces assembly steps and the required time. At the same time, the integrally formed structure also reduces potential errors and omissions during assembly, thereby improving overall assembly efficiency.

[0084] like Figure 5 as well as Figure 6 As shown, in some embodiments of this application, the cross-sectional area of ​​the convex ring 704 gradually decreases along the direction from the flange portion 702 toward the first housing portion 51. Exemplarily, the longitudinal section of the convex ring 704 can be arc-shaped or conical.

[0085] Along the flange portion 702 toward the first housing portion 51, the cross-sectional area of ​​the convex ring 704 gradually decreases, resulting in an uneven end face on the side of the convex ring 704 facing the first housing portion 51. This uneven end face helps increase the contact area and friction between the convex ring 704 and the surface of the first housing portion 51, thereby forming a good hard contact. Because of the good hard contact between the convex ring 704 and the first housing portion 51, this helps prevent a decrease in torque and axial force during bolt tightening. The stable transmission of torque and axial force ensures a tight connection between the bolt assembly 7 and the housing 5. The gradual decrease in the cross-sectional area of ​​the convex ring 704 further enhances the restraining effect on the seal 703. Since the inner edge of the convex ring 704 is closer to the seal 703, this helps prevent the sealing material from overflowing or deforming under pressure. Simultaneously, the uneven end face of the convex ring 704 also helps increase the contact pressure between the seal 703 and the convex ring 704, thereby improving sealing performance. By better limiting the seal 703 and increasing the contact pressure, this design helps improve the sealing performance of the battery housing 5. This helps prevent impurities such as moisture and dust from entering the battery, protecting the individual battery cells 6 from damage.

[0086] In some embodiments of this application, the seal 703 includes any one of acrylate sealing rings, nitrile rubber sealing rings, fluororubber sealing rings, polyurethane sealing rings, and polytetrafluoroethylene sealing rings.

[0087] Acrylic ester sealing rings have good high temperature resistance, a certain degree of elasticity and resistance to compression deformation, and good corrosion resistance to a variety of chemicals.

[0088] Nitrile rubber sealing rings have good oil resistance, good elasticity, and are easy to install and disassemble. They also have a certain degree of wear resistance and tear resistance.

[0089] Fluororubber seals exhibit excellent high and low temperature resistance, enabling them to operate under extreme temperature conditions. They also demonstrate good corrosion resistance to a variety of chemical solvents and oils. Furthermore, they possess good elasticity and reliable sealing performance.

[0090] Polyurethane sealing rings have good elasticity, strong wear resistance, excellent tear resistance and impact resistance, and also have a certain degree of corrosion resistance to various chemicals.

[0091] PTFE (polytetrafluoroethylene) sealing rings exhibit excellent chemical resistance and good stability against almost all chemicals. They also demonstrate superior high-temperature resistance, maintaining stable sealing performance at high temperatures. Furthermore, their low coefficient of friction facilitates sliding and installation.

[0092] The aforementioned materials have good sealing performance as well as certain elasticity and corrosion resistance, which can effectively improve the sealing performance between the bolt assembly 7 and the housing 5.

[0093] In some embodiments of this application, the bolt assembly 7 further includes a head 705, which is connected to the side of the flange portion 702 opposite to the screw 701, and is used to connect a fastening tool. Exemplarily, the head 705 has a polygonal or serrated cross-section, or the head 705 has a slot or cross groove for connecting with the fastening tool.

[0094] The head 705 is connected to the flange 702 on the side opposite to the screw 701. Its design typically conforms to standard tool interfaces, such as hexagonal or dodecagonal, for connection with tools such as wrenches and electric wrenches. This design makes the tightening and loosening of bolts more efficient, reducing the difficulty and time required for manual operation.

[0095] like Figure 4 As shown, in some embodiments of this application, the bolt assembly 7 further includes an insulating layer 706, which includes a first insulating portion 707 and a second insulating portion 708. The first insulating portion 707 covers the head 705, and the second insulating portion 708 covers the surface of the flange portion 702 opposite to the first housing portion 51, and the second insulating portion 708 is connected to the first insulating portion 707.

[0096] The primary function of the insulating layer 706 is to provide electrical isolation, preventing the bolt assembly 7 from becoming a conductive path in the electrical system. This is crucial for preventing short circuits and protecting the integrity of circuits and equipment. A first insulating portion 707 covers the bolt head 705, ensuring electrical isolation between the head 705 and surrounding electrical components or personnel. This helps prevent electric shock or short circuits when tightening or loosening the bolt. A second insulating portion 708 covers the surface of the flange portion 702 facing away from the first housing portion 51. This portion of the insulating layer 706 not only provides electrical isolation but also protects the flange portion 702 from external environmental corrosion. The first insulating portion 707 and the second insulating portion 708 are connected in some way to ensure the integrity and continuity of the entire insulating layer 706. Exemplarily, this connection may be achieved through adhesives, heat-shrink tubing, or a direct integral molding manufacturing method. The insulating layer 706 improves the electrical safety of the bolt assembly 7, reducing the risks of electric shock, short circuits, and arc discharge. Meanwhile, the insulation layer 706 can protect the bolt assembly 7 from corrosion, wear and other environmental factors, thereby extending its service life and reliability.

[0097] In some embodiments of this application, the second insulating portion 708 extends to the periphery of the flange portion 702. This structure provides omnidirectional electrical isolation between the flange portion 702 and surrounding electrical components, preventing current leakage through the flange portion 702 or the formation of a short circuit. In the battery device 2, the flange portion 702, as part of the bolt assembly 7, may come into contact with surrounding conductive components. If the flange portion 702 lacks proper insulation protection, a short circuit fault may occur. By extending the insulating layer 706 to the periphery of the flange portion 702, this risk can be significantly reduced. The insulating layer 706 also protects the flange portion 702 from corrosion, moisture, and other environmental factors. These environmental factors may reduce the conductivity of the flange portion 702 or cause damage to the insulating layer 706, thereby increasing the risk of a short circuit. By extending the insulating layer 706 to the periphery of the flange portion 702, its environmental adaptability can be enhanced, improving the reliability and service life of the bolt assembly 7.

[0098] This application provides an electrical device including the battery device 2 described in the above embodiments, which provides electrical energy. In the battery device 2, a housing 5 is configured as a first housing portion 51 and a second housing portion 52 that enclose each other, accommodating individual battery cells 6 and providing a stable operating environment for them. A bolt assembly 7 connects the first housing portion 51 and the second housing portion 52, increasing the connection strength between them. In the connection assembly, a screw 701 connects the first housing portion 51 and the second housing portion 52, and a flange portion 702 limits the screw 701, reducing the risk of it detaching from the housing 5. Furthermore, a seal 703 is provided between the flange portion 702 and the first housing portion 51 to reduce the risk of moisture or other impurities entering the housing 5 through the gap between the flange portion 702 and the first housing portion 51. Furthermore, a protrusion 709 is provided on the seal 703 to restrict the displacement of the seal 703, reduce the risk of seal failure due to movement of the seal 703, improve the sealing performance of the housing 5, and thus improve the operational stability of the battery cell 6.

[0099] like Figures 4 to 6 As shown, embodiments of this application also provide a bolt assembly 7 for connecting a first connecting portion and a second connecting portion. The bolt assembly 7 includes a threaded rod 701, a flange portion 702, and a seal 703. The threaded rod 701 passes through both the first connecting portion and the second connecting portion. The flange portion 702 is connected to one end of the threaded rod 701 and is located on the side of the first connecting portion opposite to the second connecting portion. The seal 703 is located between the flange portion 702 and the first connecting portion. Specifically, the surface of the flange portion 702 facing the first connecting portion has a protrusion 709, and the seal 703 is located between the protrusion 709 and the threaded rod 701.

[0100] In the above structure, the screw 701 connects the first connecting part and the second connecting part, and the flange 702 limits the screw 701, reducing the risk of the screw 701 falling off the housing 5. A seal 703 is provided between the flange 702 and the first connecting part to reduce the risk of moisture or other impurities entering the equipment through the gap between the flange 702 and the first connecting part. Furthermore, a circumferential protrusion 709 is provided on the outside of the seal 703 to restrict the movement of the seal 703, reducing the risk of seal failure due to movement of the seal 703 and improving the sealing performance between the first connecting part and the second connecting part.

[0101] It should be noted that the bolt assembly 7 provided in this application is not limited to use in the battery device 2. For example, the bolt assembly 7 can be used in automobile manufacturing to connect key components such as engines, chassis, and wheels. Alternatively, it can be applied in the aerospace field, where extremely high requirements are placed on the sealing performance and stability of the connectors. This bolt assembly 7 can be used to connect various components of aircraft or spacecraft, such as wings, fuselages, and engines. In construction engineering, this bolt assembly 7 can be used to connect large components such as steel structures, bridges, and tower cranes. Its high strength and stability help ensure the stability and safety of the building structure. Simultaneously, the design of the seal 703 helps prevent rainwater, dust, and other impurities from entering the connection, extending the service life of the building. In the manufacturing and installation of chemical equipment, this bolt assembly 7 can be used to connect various pipes, valves, and containers. Its corrosion resistance and high sealing performance help prevent chemical media leakage, ensuring production safety.

[0102] In some embodiments of this application, a protrusion 709 is arranged circumferentially around the flange portion 702 to form a convex ring 704, and a seal 703 is located within the convex ring 704, with at least a portion of the convex ring 704 abutting against the first connecting portion. The circumferentially surrounding convex ring 704, provided outside the seal 703, confines the seal 703 within the convex ring 704, further reducing the risk of seal failure due to movement of the seal 703 and improving the sealing performance between the first connecting portion and the second connecting portion.

[0103] In some embodiments of this application, the bolt assembly 7 further includes a head 705 connected to the side of the flange portion 702 opposite to the screw 701. The head 705 is used to connect a fastening tool. The bolt assembly 7 also includes an insulating layer 706, which includes a first insulating portion 707 and a second insulating portion 708. The first insulating portion 707 covers the head 705. The second insulating portion 708 covers the surface of the flange portion 702 opposite to the first connecting portion, and the second insulating portion 708 is connected to the first insulating portion 707.

[0104] In the above structure, by setting the insulating layer 706, the insulation performance of the bolt assembly 7 is improved, thereby enhancing the safety of equipment operation.

[0105] In some alternative embodiments, the bolt assembly 7 is used to connect the first connecting portion and the second connecting portion. The bolt assembly 7 includes a screw 701, a flange 702, and a seal 703. The screw 701 passes through the first connecting portion and the second connecting portion. The flange 702 is connected to one end of the screw 701 and is located on the side of the first connecting portion opposite to the second connecting portion. The seal 703 is located between the flange 702 and the first connecting portion. The flange 702 has a raised ring 704 on its surface facing the first connecting portion. The raised ring 704 is circumferentially arranged around the flange 702, and the seal 703 is located within the raised ring 704. At least a portion of the raised ring 704 abuts against the first connecting portion. The seal 703 is an acrylic sealing ring. The flange 702 and the raised ring 704 are integrally formed. The bolt assembly 7 also includes a head 705, which is connected to the flange portion 702 on the side opposite to the threaded rod 701. The head 705 is used to connect a fastening tool. The bolt assembly 7 also includes an insulating layer 706, which includes a first insulating portion 707 and a second insulating portion 708. The first insulating portion 707 covers the head 705. The second insulating portion 708 covers the surface of the flange portion 702 on the side opposite to the first connection portion, and the second insulating portion 708 is connected to the first insulating portion 707. The second insulating portion 708 extends to the periphery of the flange portion 702.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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. A battery device, characterized in that, include: The housing includes a first housing section and a second housing section, which together enclose a space for accommodating a single battery cell. A bolt assembly for connecting a first housing portion and a second housing portion, the bolt assembly including a bolt, a flange portion and a seal, the flange portion having a protrusion on its surface facing the first housing portion, and the seal being disposed between the protrusion and the bolt.

2. The battery device as claimed in claim 1, characterized in that, The protrusion is arranged to form a convex ring around the flange portion in the circumferential direction, and the seal is located inside the convex ring.

3. The battery device as claimed in claim 1, characterized in that, The screw passes through the first housing portion and the second housing portion. The flange portion is connected to one end of the screw portion and is located on the side of the first housing portion away from the second housing portion. The sealing element is located between the flange portion and the first housing portion.

4. The battery device as claimed in claim 2, characterized in that, At least a portion of the convex ring abuts against the first housing portion.

5. The battery device as claimed in claim 4, characterized in that, The flange and the convex ring are integrally formed.

6. The battery device as claimed in claim 4, characterized in that, Along the direction from the flange portion toward the first housing portion, the cross-sectional area of ​​the convex ring gradually decreases.

7. The battery device as claimed in claim 4, characterized in that, The sealing element includes any one of acrylate sealing rings, nitrile rubber sealing rings, fluororubber sealing rings, polyurethane sealing rings, and polytetrafluoroethylene sealing rings.

8. The battery device according to any one of claims 1-7, characterized in that, The bolt assembly also includes a head connected to the side of the flange opposite to the bolt, the head being used to connect a fastening tool.

9. The battery device as claimed in claim 8, characterized in that, The bolt assembly further includes an insulating layer comprising: A first insulating part covers the head; The second insulating part covers the surface of the flange part away from the first housing part, and the second insulating part is connected to the first insulating part.

10. The battery device as claimed in claim 9, characterized in that, The second insulating portion extends to the periphery of the flange portion.

11. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-10, the battery device being used to provide electrical energy.

12. A bolt assembly, characterized in that, The bolt assembly, used to connect the first connecting part and the second connecting part, includes: The screw passes through the first connecting part and the second connecting part; A flange is connected to one end of the screw, and the flange is located on the side of the first connecting part opposite to the second connecting part; A sealing element is disposed between the flange portion and the first connecting portion. The flange portion has a protrusion on its surface facing the first connection portion, and the sealing element is disposed between the protrusion and the screw.

13. The bolt assembly as claimed in claim 12, characterized in that, The protrusion is arranged circumferentially around the flange to form a convex ring, the seal is located inside the convex ring, and at least a portion of the convex ring abuts against the first connecting portion.

14. The bolt assembly as claimed in claim 12 or 13, characterized in that, The bolt assembly further includes a head connected to the flange portion on the side opposite to the threaded rod, the head being used to connect a fastening tool. The bolt assembly also includes an insulating layer comprising: A first insulating part covers the head; The second insulating part covers the surface of the flange part opposite to the first connecting part, and the second insulating part is connected to the first insulating part.

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