Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device.The battery device comprises a box body assembly, a plurality of single batteries and a protection structure, the box body assembly comprises a first box body and a second box body which cover each other, and the first box body and the second box body are connected through a fastener and jointly define a containing space; the plurality of battery monomers are arranged in the accommodating space, the protection structure comprises a first protection part and a second protection part, the first protection part and the second protection part are arranged on the box body assembly, and the first protection part and the second protection part respectively cover the two ends of the fastener. According to the technical scheme, the first protection piece and the second protection piece can cover the two exposed ends of the fastener, direct contact between an external corrosion medium and the fastener is effectively blocked, the corrosion risk of the fastener under the severe working condition is remarkably reduced, the connection reliability of the first box body and the second box body is improved, and the service life of the first box body and the second box body is prolonged. And the service life and the reliability of the battery device are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] The first box and the second box of the battery device are connected by fasteners. Under harsh working conditions, the fasteners are easily damaged, which not only affects the connection between the first box and the second box, but also causes the internal battery cells to fall off, affecting the service life of the battery device. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can protect fasteners by providing a protective structure, reduce the probability of fastener damage under harsh working conditions, and extend the service life of the battery device.

[0005] In the first aspect, the present application provides a battery device comprising: a box assembly, a plurality of battery cells and a protective structure, the box assembly comprising a first box and a second box covering each other, the first box and the second box being connected by a fastener, and the two together define a accommodating space; a plurality of battery cells are arranged in the accommodating space; the protective structure comprises a first protective member and a second protective member, the first protective member and the second protective member are both arranged in the box assembly and respectively cover both ends of the fastener.

[0006] In the technical solution of the embodiment of the present application, by arranging the first protective member and the second protective member on the box assembly, the first protective member and the second protective member can cover the two ends of the fastener exposed to the outside, which can effectively block the direct contact between the external corrosive medium and the fastener, thereby significantly reducing the corrosion risk of the fastener under harsh working conditions, improving the connection reliability of the first box and the second box, and reducing the probability of the battery cells in the box assembly falling, which is beneficial to improving the service life and reliability of the battery device.

[0007] According to some embodiments of the present application, the first box body and the second box body have a mounting surface for installing the fastener on one side away from each other, and both ends of the fastener protrude from the corresponding mounting surface, wherein each of the first protective member and the second protective member includes a main body portion, the main body portion includes an end wall and a surrounding wall, the end wall is arranged at the end of the fastener, and the surrounding wall is connected to the peripheral side of the fastener and is connected to the mounting surface.

[0008] In the above embodiment, by setting each of the first protective member and the second protective member to include a main body portion, the first protective member and the second protective member can respectively define a first accommodating groove and a second accommodating groove, so that the first protective member and the second protective member can cover the ends and the surrounding sides of the fastener exposed to the outside, thereby achieving anti-corrosion protection for the fastener.

[0009] According to some embodiments of the present application, each of the first protective member and the second protective member further includes a connecting portion, which surrounds the outside of the main body and is connected to the surrounding wall, and the connecting portion is connected to the mounting surface.

[0010] In the above embodiment, by setting each of the first protective member and the second protective member to also include a connecting portion, and utilizing the connecting portion to connect with the mounting surface of the corresponding box, the connection area between each of the first protective member and the second protective member and the corresponding box can be increased, thereby improving the installation reliability of the first protective member and the second protective member, reducing the risk of the first protective member or the second protective member falling off, and effectively achieving anti-corrosion protection for the fasteners.

[0011] According to some embodiments of the present application, a projected area of ​​the main body on the mounting surface is S1, a projected area of ​​the connecting portion on the mounting surface is S2, and the sum of S1 and S2 is 1.5-4 times that of S1.

[0012] Therefore, in the embodiment of the present application, by limiting the sum of S1 and S2 to 1.5-4 times the area of ​​S1, that is, the area of ​​S2 is 0.5-3 times the area of ​​S1, while meeting the anti-corrosion requirements, it is possible to reduce the impact of the installation of other components of the battery device due to the excessive area of ​​the protective structure on the installation surface, and at the same time reduce the additional weight of the battery device, thereby improving the convenience of the battery device.

[0013] According to some embodiments of the present application, each of the first protective member and the second protective member has a dimension less than or equal to 50 mm in the length direction of the box assembly, a dimension less than or equal to 50 mm in the width direction of the box assembly, and a dimension less than or equal to 10 mm in the height direction of the box assembly.

[0014] Therefore, by limiting the sizes of the first protective member and the second protective member in the length, width and height directions of the box assembly, on the one hand, the sizes of the first protective member and the second protective member are moderate and the installation is easier. On the other hand, on the basis of effective anti-corrosion effect, the material used for the first protective member and the second protective member can be reduced, thereby reducing material costs and improving economic benefits.

[0015] According to some embodiments of the present application, the number of the fasteners and the protective structure are both multiple, the multiple fasteners are arranged circumferentially of the box assembly, and the multiple protective structures correspond one-to-one to the positions of the multiple fasteners.

[0016] In the above technical solution, by setting up multiple protective structures and multiple fasteners with corresponding positions, the protective structures can cover the exposed ends of the multiple fasteners, thereby further reducing the probability of connection failure between the first box and the second box, and effectively improving the service life and reliability of the battery device.

[0017] According to some embodiments of the present application, the plurality of protective structures are independently provided, and in each of the protective structures, the first protective element and the second protective element are independently provided.

[0018] In the above technical solution, by providing independent first and second protective members, the exposed ends of the fastener can be individually covered, allowing for adjustment based on the structure near the fastener. Furthermore, if a protective member becomes damaged, it can be promptly replaced without having to replace both the first and second protective members, thus reducing subsequent maintenance costs. Furthermore, during installation, multiple installers can independently install the first and second protective members, significantly improving the efficiency of the protective structure's installation.

[0019] According to some embodiments of the present application, the first protective members of at least two adjacent protective structures are integrally formed.

[0020] In the above technical solution, by integrally forming at least two adjacent first protective members, on the one hand, one end of at least two adjacent fasteners can be covered, thereby improving the installation efficiency of the protective structure; on the other hand, the connection area between the first protective member and the mounting surface of the first box body can be increased, thereby reducing the risk of the first protective member falling off during use of the battery device and improving the durability and stability of the protective structure.

[0021] According to some embodiments of the present application, the second protective members of at least two adjacent protective structures are integrally formed.

[0022] In the above technical solution, by integrally forming at least two adjacent second protective members, on the one hand, the other ends of at least two adjacent fasteners can be covered, thereby improving the installation efficiency of the protective structure; on the other hand, the connection area between the second protective member and the mounting surface of the second box body can be increased, thereby reducing the risk of the second protective member falling off during use of the battery device and improving the durability and stability of the protective structure.

[0023] According to some embodiments of the present application, the protective structure further includes a connecting member, which is located on a peripheral side of the box assembly and connected between the first protective member and the second protective member.

[0024] In the above technical solution, by configuring the protective structure to also include a connector, the connector can be used to connect the first and second protective members covering both ends of the same fastener, thereby forming an integrated protective structure. When using this integrated protective structure to cover both ends of the fastener, the installation efficiency of the protective structure can be greatly improved.

[0025] According to some embodiments of the present application, the first protective member, the second protective member and the connecting member are integrally formed.

[0026] There are no connections or splicing parts between the one-piece first protective part, the second protective part and the connecting part, which makes the overall structure of the protective structure tighter and more stable, and can better cover the exposed ends of the fasteners. At the same time, the one-piece molding process can realize the automated production of the protective structure, and can produce protective structures in large quantities and quickly, thereby improving production efficiency and reducing production costs.

[0027] According to some embodiments of the present application, at least one of the first protective member and the second protective member includes anti-corrosion glue, and the anti-corrosion glue is coated on at least the outer surface of the fastener.

[0028] In the above technical solution, by coating the anti-corrosion glue at least on the outer surface of the fastener, not only can the exposed ends of the fastener be isolated from contact with the external corrosive medium from the root, thereby protecting the fastener, but also the after-sales maintenance cost can be reduced and the economic benefits can be improved.

[0029] According to some embodiments of the present application, at least one of the first protective member and the second protective member includes an anti-corrosion sheet, and the anti-corrosion sheet is bonded to the box assembly and the fastener.

[0030] In the above technical solution, by bonding the anti-corrosion sheet to the box assembly and the fasteners, not only can the exposed ends of the fasteners be isolated from contact with the external corrosive medium at the source, thereby protecting the fasteners, but the adhesion and protective performance of the anti-corrosion sheet can also be ensured, thereby significantly improving the anti-corrosion ability of the fasteners.

[0031] According to the battery device described in any one of the above embodiments, the first box body includes a first main body and a first annular flange, the first annular flange extends along the circumference of the first main body, the second box body includes a second main body and a second annular flange, the second annular flange extends along the circumference of the second main body, and the first main body and the second main body jointly define the accommodating space.

[0032] Wherein, the fastener is passed through the first annular flange and the second annular flange, the first protective member is arranged on the side of the first annular flange away from the second annular flange, and the second protective member is arranged on the side of the second annular flange away from the first annular flange.

[0033] In the above technical solution, by setting the first box body to include a first annular flange and setting the second box body to include a second annular flange, on the one hand, a positioning basis is provided for the covering of the first body and the second body, which facilitates the fasteners to connect the first box body and the second box body; on the other hand, when the battery device is collided or squeezed, the first annular flange and the second annular flange can disperse the impact force and reduce the risk of damage to the battery device.

[0034] In a second aspect, the present application provides an electrical device comprising the battery device in the above embodiment.

[0035] The electrical device of the embodiment of the present application can be used normally by configuring the electrical device to include the battery device of the above embodiment. At the same time, the battery device of the above embodiment improves the reliability of the battery device through the protective structure. Therefore, the electrical device including the battery device of the above embodiment has good reliability.

[0036] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A schematic diagram of the structure of a vehicle is provided as the electrical device provided in some embodiments of the present application;

[0039] Figure 2 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0040] Figure 3 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0041] Figure 4 yes Figure 3 An enlarged view of section A shown in FIG;

[0042] Figure 5 yes Figure 3 An enlarged view of part B shown in ;

[0043] Figure 6 is a schematic structural diagram of a protective structure of a battery device provided in some embodiments of the present application;

[0044] Figure 7 is a schematic structural diagram of a first protective member or a second protective member of a battery device provided in other embodiments of the present application;

[0045] Figure 8 Schematic diagram of the structure of the protection structure of the battery device provided in some embodiments of the present application.

[0046] The accompanying drawings in the specific implementation manner are as follows:

[0047] Battery device 100;

[0048] Box assembly 10; accommodating space 10a; mounting surface 10b;

[0049] First box 11; first body 111; first recess 111a; first protrusion 111b; first annular flange 112;

[0050] Second box 12; second body 121; second recess 121a; second protrusion 121b; second annular flange 122;

[0051] Fastener 13; lifting piece 14; lifting hole 15;

[0052] Battery cell 20;

[0053] Protective structure 30; first protective member 31; first receiving groove 310; second protective member 32; second receiving groove 320; body portion 33; end wall 331; surrounding wall 332; connecting portion 34; connecting member 35;

[0054] Electrical device 400 ; controller 41 ; motor 42 . DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0058] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] 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.

[0060] 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).

[0061] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0062] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0063] Currently, market developments indicate that power battery applications are becoming increasingly widespread. Power battery systems are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of power battery systems continue to expand, market demand is also growing.

[0064] The applicant has noticed that the first box and the second box of the battery device in the related art are connected by fasteners, but in environments such as high-speed wading and salt spray tests, the fasteners are prone to corrosion, which not only affects the connection between the first box and the second box, but also causes the internal battery cells to fall off, reducing the service life of the battery device.

[0065] In order to solve the problem that fasteners are prone to corrosion under working conditions such as high-speed wading and salt spray tests, this application sets up a protective structure and uses the protective structure to cover the exposed surface of the fastener, thereby effectively blocking the exposed surface of the fastener from contacting the corrosive medium from the root.

[0066] The battery device disclosed in the embodiments of the present application can be used in electrical devices that use it as a power source or various energy storage systems that use it as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0067] For the convenience of description, the following embodiments are described by taking an electric device 400 of an embodiment of the present application as a vehicle as an example.

[0068] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be provided at the bottom, head or tail of the vehicle. The battery device 100 can be used to power the vehicle. For example, the battery device 100 can serve as an operating power source for the vehicle. The vehicle may also include a controller 41 and a motor 42. The controller 41 is used to control the battery device 100 to power the motor 42, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0069] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0070] Please refer to Figure 2 , Figure 2 An exploded view of the structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a case assembly 10 and a battery cell 20, with the battery cell 20 being housed in the case assembly 10. The case assembly 10 is used to provide a storage space 10a for the battery cell 20, and the case assembly 10 can adopt a variety of structures. In some embodiments, the case assembly 10 can include a first case 11 and a second case 12, the first case 11 and the second case 12 covering each other, and the first case 11 and the second case 12 jointly defining a storage space 10a for accommodating the battery cell 20. The second case 12 can be a hollow structure with one end open, and the first case 11 can be a plate-shaped structure, and the first case 11 covers the open side of the second case 12, so that the first case 11 and the second case 12 jointly define the storage space 10a; the first case 11 and the second case 12 can also be hollow structures with one side open, and the open side of the first case 11 covers the open side of the second case 12. Of course, the box assembly 10 formed by the first box 11 and the second box 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0071] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery device 100 may be housed within the housing assembly 10. Of course, the battery device 100 may also be a module of the battery device 100, in which multiple battery cells 20 are first connected in series, in parallel, or in a hybrid connection, and then the multiple battery device 100 modules are further connected in series, in parallel, or in a hybrid connection to form an entire battery device 100, and then housed within the housing assembly 10. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar (not shown) for electrically connecting the multiple battery cells 20.

[0072] Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0073] The battery cell 20 is the smallest unit constituting the battery device 100 . The battery cell 20 includes a housing cover (not shown), a housing body (not shown), an electrode assembly (not shown), and other functional components.

[0074] The shell cover is a component that fits over the opening of the shell body to isolate the internal environment of the battery cell 20 from the external environment. The shape of the shell cover can be adapted to the shape of the shell body to complement the shell. Optionally, the shell cover can be made of a material with a certain degree of hardness and strength (such as aluminum alloy). This prevents deformation during compression and collision, providing the battery cell 20 with greater structural strength and improved reliability. The shell cover may be provided with functional components such as electrode terminals (not shown). The electrode terminals are used for electrical connection to the electrode assembly to transfer electrical energy to or from the battery cell 20. In some embodiments, the shell cover may also be provided with a pressure relief mechanism (not shown) for relieving internal pressure in the battery cell 20 when the internal pressure or temperature reaches a threshold. The shell cover can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this is not particularly limited in the present embodiments. In some embodiments, an insulating member (not shown) may be provided inside the housing cover to isolate the electrical connection components within the housing from the housing cover to reduce the risk of short circuits. Exemplarily, the insulating member may be made of plastic, rubber, or the like.

[0075] The shell body is a component that cooperates with the shell cover to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly, electrolyte (not shown), and other components. The shell body and shell cover can be separate components. An opening can be provided in the shell body, and the shell cover is closed over the opening to form the internal environment of the battery cell 20. The shell cover and shell body can also be integrated. Specifically, the shell cover and shell body can form a common connection surface before other components are inserted into the shell. When the interior of the shell body needs to be encapsulated, the shell cover is closed over the shell body. The shell body can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the shell body can be determined by the specific shape and size of the electrode assembly. The shell body can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of this application do not impose any specific limitations on this.

[0076] The electrode assembly is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies may be contained in the shell. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0077] Please refer again Figure 2 , and further reference Figure 3-Figure 5 , Figure 3 A schematic structural diagram of a battery device 100 provided in some embodiments of the present application; Figure 4 yes Figure 3 An enlarged view of section A shown in FIG; Figure 5 yes Figure 3 The first box body 11 and the second box body 12 are connected by a fastener 13 and together define a receiving space 10a. A plurality of battery cells 20 are disposed in the receiving space 10a.

[0078] On the one hand, the accommodating space 10a can provide an installation carrier for multiple battery cells 20, so that multiple battery cells 20 can be installed together and connected to supply power to the electrical device 400. On the other hand, when the battery device 100 is subjected to an external impact, the first box body 11 and the second box body 12 will take priority in bearing the impact and buffer at least part of the impact energy, so that the battery cells 20 in the accommodating space 10a are subjected to less impact, thereby improving the safety of the battery device 100.

[0079] The battery device 100 provided herein also includes a protective structure 30, which includes a first protective member 31 and a second protective member 32. The first protective member 31 and the second protective member 32 are both provided on the housing assembly 10 and respectively cover the ends of the fastener 13. In other words, the protective structure 30 can wrap around the exposed ends of the fastener 13, which is equivalent to forming an anti-corrosion protective layer on the exposed outer surfaces of the fastener 13.

[0080] In the technical solution of the embodiment of the present application, a first protective member 31 and a second protective member 32 are arranged on the box assembly 10, and the first protective member 31 and the second protective member 32 can cover the two ends of the fastener 13 exposed to the outside, thereby effectively blocking direct contact between the external corrosive medium and the fastener 13, thereby significantly reducing the corrosion risk of the fastener 13 under harsh working conditions, improving the connection reliability of the first box 11 and the second box 12, and reducing the probability of the battery cell 20 in the box assembly 10 falling, which is beneficial to improving the service life and reliability of the battery device 100.

[0081] Please refer again Figure 3-Figure 5 The first box body 11 and the second box body 12 are both provided with connection holes near the edges. After multiple battery cells 20 are placed in the accommodating space 10a, the fasteners 13 can be passed through the connection holes on the first box body 11 and the connection holes of the second box body 12 in sequence to connect the first box body 11 and the second box body 12 together. This can reduce the situation where the first box body 11 and the second box body 12 are disconnected due to their own gravity or external factors, thereby reducing the possibility of multiple battery cells 20 in the accommodating space 10a being disconnected from the accommodating space 10a, thereby improving the reliability of the battery device 100.

[0082] It can be understood that the fastener 13 passes through the connection hole on the first box body 11 and the connection hole on the second box body 12. In order to improve the connection reliability of the first box body 11 and the second box body 12, the two ends of the fastener 13 generally protrude from the outer surface of the corresponding box body so that the two ends of the fastener 13 are exposed. In this way, when the battery device 100 is in harsh working conditions, such as high-speed wading, salt spray testing and other working conditions, the exposed two ends of the fastener 13 are very likely to come into contact with media such as water and salt spray, causing corrosion of the fastener 13. In the technical solution of the embodiment of the present application, the first protective member 31 and the second protective member 32 respectively cover the two ends of the fastener 13, and the two ends of the fastener 13 are isolated from the outside world, which can reduce the corrosion of the fastener 13 and effectively reduce the situation where the first box body 11 and the second box body 12 are separated due to the connection failure of the fastener 13.

[0083] The fasteners 13 may include bolts and other components.

[0084] For example, a plurality of hanging pieces 14 are provided on the box assembly 10, a portion of the hanging piece 14 can be set on the side wall of the first box 11, and another portion of the hanging piece 14 can be set on a position near the edge of the first box 11; or, a portion of the hanging piece 14 can be set on the side wall of the second box 12, and another portion of the hanging piece 14 can be set on a position near the edge of the second box 12, and a hanging hole 15 is provided on the hanging piece 14, and a hanging piece (not shown in the figure) can be used to pass through the hanging hole 15 to hang the battery device 100 at a specific position of the electrical device 400, so that power can be supplied to the electrical device 400.

[0085] For example, the housing assembly 10 may not be provided with the lifting tab 14, that is, a plurality of lifting holes 15 may be provided on the second housing 11 or the second housing 12. A lifting member may be passed through the lifting holes 15 to lift the battery assembly 100 to a specific location on the power-consuming device 400, thereby facilitating the battery assembly 100 to power the power-consuming device 400.

[0086] For example, a plurality of lifting plates 14 are provided on the box assembly 10, and lifting holes 15 are provided on the lifting plates 14. A separate lifting hole 15 is also provided on the box assembly 10. The battery device 100 can be lifted at a specific position of the electrical device 400 by passing a lifting piece through the lifting holes 15 on the lifting plates 14 and the lifting holes 15 on the box assembly 10, so that the battery device 100 can supply power to the electrical device 400.

[0087] Please refer again Figure 4-Figure 5 , and further reference Figure 6 , Figure 6 Schematic diagram of the protective structure 30 of the battery device 100 provided in some embodiments of the present application. According to some embodiments of the present application, the first housing 11 and the second housing 12 each have a mounting surface 10b for mounting a fastener 13 on a side facing away from each other, with both ends of the fastener 13 protruding from the corresponding mounting surface 10b.

[0088] Among them, each of the first protective member 31 and the second protective member 32 includes a main body 33, the main body 33 includes an end wall 331 and a surrounding wall 332, the end wall 331 is arranged at the end of the fastener 13, and the surrounding wall 332 is connected to the peripheral side of the fastener 13 and connected to the mounting surface 10b.

[0089] Specifically, the end wall 331 and the surrounding wall 332 of the first protective member 31 enclose a first accommodating groove 310, which can accommodate the fastener 13 protruding from one end of the mounting surface 10b of the first box body 11, and the end wall 331 and the surrounding wall 332 of the second protective member 32 enclose a second accommodating groove 320, which can accommodate the fastener 13 protruding from the other end of the mounting surface 10b of the second box body 12.

[0090] The mounting surface 10 b of the first box body 11 can provide a mounting carrier for the first protective member 31 , and the mounting surface 10 b of the second box body 12 can provide a mounting carrier for the second protective member 32 .

[0091] When installing the protective structure 30, the first protective member 31 can be first covered on the exposed end of the fastener 13, so that the surrounding wall 332 of the first protective member 31 surrounds the circumference of one end of the fastener 13, and the end wall 331 covers the end of one end of the fastener 13, that is, the exposed end of the fastener 13 is accommodated in the first accommodating groove 310, and then the surrounding wall 332 of the first protective member 31 is connected to the installation surface 10b of the first box body 11, so that the first protective member 31 covers the exposed end of the fastener 13. Then, the second protective member 32 is covered on the other exposed end of the fastener, so that the surrounding wall 332 of the second protective member 32 surrounds the other end of the fastener 13, and the end wall 331 of the second protective member 32 covers the end portion of the other end of the fastener 13, that is, the other exposed end of the fastener 13 is accommodated in the second accommodating groove 320, and then the surrounding wall 332 of the second protective member 32 is connected to the mounting surface 10b of the second box body 12, so that the second protective member 32 covers the other exposed end of the fastener 13.

[0092] Of course, the second protective member 32 can also be installed on the mounting surface 10b of the second housing 12 first, and then the first protective member 31 can be installed on the mounting surface 10b of the first housing 11. The installation operation is the same as the above-mentioned installation method and will not be repeated here. In this way, the protective structure 30 finally covers the exposed portions of the ends of the fastener 13.

[0093] In the above embodiment, by setting each of the first protective member 31 and the second protective member 32 to include a main body portion 33, the first protective member 31 and the second protective member 32 can respectively define a first accommodating groove 310 and a second accommodating groove 320, so that the first protective member 31 and the second protective member 32 can cover the ends and the surrounding sides of the fastener 13 exposed to the outside, thereby achieving anti-corrosion protection for the fastener 13.

[0094] Reference Figure 5 and Figure 6 According to some specific embodiments of the present application, each of the first protective member 31 and the second protective member 32 further includes a connecting portion 34, which surrounds the outer side of the main body portion 33 and is connected to the surrounding wall 332, and the connecting portion 34 is connected to the mounting surface 10b.

[0095] In the above embodiment, by setting each of the first protective member 31 and the second protective member 32 to also include a connecting portion 34, and utilizing the connecting portion 34 to connect to the mounting surface 10b of the corresponding box, the connection area between each of the first protective member 31 and the second protective member 32 and the corresponding box can be increased, thereby improving the installation reliability of the first protective member 31 and the second protective member 32, reducing the risk of the first protective member 31 or the second protective member 32 falling off, and effectively achieving anti-corrosion protection for the fastener 13.

[0096] According to some specific embodiments of the present application, the projected area of ​​the main body 33 on the mounting surface 10b is S1, the projected area of ​​the connecting portion 34 on the mounting surface 10b is S2, and the sum of S1 and S2 is 1.5-4 times S1. For example, the sum of S1 and S2 is 1.5, 2, 2.5, 3, 3.5, or 4 times S1.

[0097] Based on the size, shape and working environment of the fastener 13, the applicant found through precise calculation and experimental verification that if the sum of S1 and S2 is less than 1.5 times S1, the connection area between the connecting portion 34 and the mounting surface 10b is small, which will cause the connection ability between the protective structure 30 and the mounting surface 10b to be weak. During the use of the battery device 100, the connecting portion 34 may be separated from the mounting surface 10b, thereby causing the protective structure 30 to fall off; if the sum of S1 and S2 is greater than 4 times S1, it may affect the installation of other components of the battery device 100. At the same time, the protective structure 30 has a certain mass, which will also increase the weight of the battery device 100 and increase the load of the box assembly 10.

[0098] Therefore, in the embodiment of the present application, by limiting the sum of S1 and S2 to 1.5-4 times the area of ​​S1, that is, the area of ​​S2 is 0.5-3 times the area of ​​S1, while meeting the anti-corrosion requirements, the impact of the excessive area of ​​the protective structure 30 on the installation surface 10b on the installation of other components of the battery device 100 can be reduced. At the same time, the additional weight of the battery device 100 can be reduced, thereby improving the convenience of the battery device 100.

[0099] Reference Figure 3 and Figure 5 According to some embodiments of the present application, each of the first protective member 31 and the second protective member 32 has a dimension in the length direction of the box assembly 10 that is less than or equal to 50 mm, a dimension in the width direction of the box assembly 10 that is less than or equal to 50 mm, and a dimension in the height direction of the box assembly 10 that is less than or equal to 10 mm.

[0100] in, Figure 3 The X direction is the length direction of the box assembly 10, the Y direction is the width direction of the box assembly 10, and the Z direction is the height direction of the box assembly 10.

[0101] Therefore, by limiting the sizes of the first protective member 31 and the second protective member 32 in the length, width and height directions of the box assembly 10, on the one hand, the sizes of the first protective member 31 and the second protective member 32 are moderate and the installation is easier. On the other hand, on the basis of effective anti-corrosion effect, the material used in the first protective member 31 and the second protective member 32 can be reduced, thereby reducing material costs and improving economic benefits.

[0102] Reference Figure 3 According to some embodiments of the present application, the number of fasteners 13 and protective structures 30 are both multiple, the multiple fasteners 13 are arranged circumferentially around the box assembly 10, and the multiple protective structures 30 correspond one-to-one to the positions of the multiple fasteners 13.

[0103] For example, since the overall size of the battery device 100 is large, a plurality of corresponding connection holes are arranged in the circumferential direction of the first box body 11 and the second box body 12, and a plurality of fasteners 13 are passed through the plurality of connection holes one by one, so that the first box body 11 and the second box body 12 can be tightly connected in the circumferential direction, thereby increasing the stability of the connection between the first box body 11 and the second box body 12.

[0104] Correspondingly, there are multiple protective structures 30, and the multiple protective structures 30 cover the exposed ends of the multiple fasteners 13 one by one. Each protective structure 30 can completely cover the exposed ends of the corresponding fastener 13, thereby further reducing the probability of connection failure between the first box body 11 and the second box body 12, and effectively improving the service life and reliability of the battery device 100.

[0105] Please refer again Figure 6 According to some embodiments of the present application, multiple protective structures 30 are independently provided, and in each protective structure 30, the first protective member 31 and the second protective member 32 are independently provided. In other words, the first protective member 31 and the second protective member 32 are separately provided at the two ends of the fastener 13 that are exposed to the outside.

[0106] In the above technical solution, by providing independent first and second protective members 31, 32, respectively, the exposed ends of fastener 13 can be covered, allowing for adjustment based on the structure near fastener 13. Furthermore, if a protective member becomes damaged, it can be promptly replaced without having to replace both first and second protective members 31, 32, thus reducing subsequent maintenance costs. Furthermore, during installation, multiple installers can independently install first and second protective members 31, 32, significantly improving the efficiency of protective structure 30 installation.

[0107] Reference Figure 7 , Figure 73 is a structural diagram of the first protective member 31 or the second protective member 32 of the battery device 100 provided in some other embodiments of the present application. According to some embodiments of the present application, the first protective members 31 of at least two adjacent protective structures 30 are integrally formed.

[0108] In the above technical solution, by integrally forming at least two adjacent first protective members 31, on the one hand, one end of at least two adjacent fasteners 13 can be covered, thereby improving the installation efficiency of the protective structure 30; on the other hand, the connection area between the first protective member 31 and the mounting surface 10b of the first box body 11 can be increased, thereby reducing the risk of the first protective member 31 falling off during the use of the battery device 100 and improving the durability and stability of the protective structure 30.

[0109] Reference Figure 7 According to some embodiments of the present application, the second protective members 32 of at least two adjacent protective structures 30 are integrally formed.

[0110] In the above technical solution, by integrally forming at least two adjacent second protective members 32, on the one hand, the other ends of at least two adjacent fasteners 13 can be covered, thereby improving the installation efficiency of the protective structure 30; on the other hand, the connection area between the second protective member 32 and the mounting surface 10b of the second box body 12 can be increased, thereby reducing the risk of the second protective member 32 falling off during the use of the battery device 100 and improving the durability and stability of the protective structure 30.

[0111] Reference Figure 8 , Figure 8 FIG2 is a schematic structural diagram of a protective structure 30 of a battery device 100 according to some embodiments of the present application. According to some embodiments of the present application, the protective structure 30 further includes a connector 35 , which is located on a peripheral side of the box assembly 10 and connected between the first protective member 31 and the second protective member 32 .

[0112] In the above technical solution, by configuring the protective structure 30 to further include a connector 35, the connector 35 can be used to connect the first protective member 31 and the second protective member 32 covering both ends of the same fastener 13, so that the first protective member 31 and the second protective member 32 form an integrated protective structure 30. When using this integrated protective structure 30 to cover both ends of the fastener 13, the installation efficiency of the protective structure 30 can be greatly improved.

[0113] Reference Figure 8 According to some embodiments of the present application, the first protective member 31, the second protective member 32 and the connecting member 35 are integrally formed. In other words, the protective structure 30 is an integrally formed member.

[0114] There is no connection or splicing between the one-piece first protective part 31, the second protective part 32 and the connecting part 35, which makes the overall structure of the protective structure 30 tighter and more stable, and can better cover the exposed ends of the fastener 13. At the same time, the one-piece molding process can realize the automated production of the protective structure 30, and can produce the protective structure 30 in large quantities and quickly, thereby improving production efficiency and reducing production costs.

[0115] According to some embodiments of the present application, at least one of the first protective member 31 and the second protective member 32 includes anti-corrosion glue, and the anti-corrosion glue is coated on at least the outer surface of the fastener 13 .

[0116] Specifically, after using the fasteners 13 to connect the first box body 11 and the second box body 12, anti-corrosion glue can be applied to the outer surface of the fasteners 13 respectively. After the anti-corrosion glue is cured, a tough protective film can be formed on the outer surface of the fasteners 13, thereby isolating the exposed ends of the fasteners 13 from contact with external corrosive media.

[0117] By controlling the coating area and thickness of the anti-corrosion adhesive, the exposed ends of the fasteners 13 can be fully covered with the anti-corrosion adhesive, while also minimizing the impact of the anti-corrosion adhesive coating on the installation of other components of the battery device 100. Furthermore, the anti-corrosion adhesive is easy to use and has a low production cost, which helps reduce the production cost of the battery device 100 and improve economic benefits.

[0118] In the above technical solution, by coating the anti-corrosion glue at least on the outer surface of the fastener 13, not only can the exposed ends of the fastener 13 be isolated from contact with the external corrosive medium from the source, thereby protecting the fastener 13, but also the after-sales maintenance cost can be reduced and the economic benefits can be improved.

[0119] According to some embodiments of the present application, at least one of the first protective member 31 and the second protective member 32 includes an anti-corrosion sheet, and the anti-corrosion sheet is bonded to the box assembly 10 and the fastener 13 .

[0120] Specifically, after using the fastener 13 to connect the first box body 11 and the second box body 12, the anti-corrosion sheet can be pasted on the surface of the fastener 13 and the surface of the box assembly 10. The exposed part of the fastener 13 is completely covered by the anti-corrosion sheet, which fundamentally isolates the exposed ends of the fastener 13 from contact with the external corrosive medium.

[0121] For example, the anti-corrosion sheet is a high-quality anti-corrosion patch material. By strictly controlling the pasting process, it can be ensured that the anti-corrosion sheet can maintain good adhesion and protective performance under various complex working conditions, significantly improving the anti-corrosion ability of the fastener 13.

[0122] In the above technical solution, by bonding the anti-corrosion sheet to the box assembly 10 and the fastener 13, not only can the exposed ends of the fastener 13 be isolated from contact with the external corrosive medium at the source, thereby protecting the fastener 13, but the adhesion and protective performance of the anti-corrosion sheet can also be ensured, thereby significantly improving the anti-corrosion ability of the fastener 13.

[0123] Reference Figure 3-Figure 5 According to some embodiments of the present application, the first box body 11 includes a first body 111 and a first annular flange 112, the first annular flange 112 extends along the circumference of the first body 111, the second box body 12 includes a second body 121 and a second annular flange 122, the second annular flange 122 extends along the circumference of the second body 121, and the first body 111 and the second body 121 jointly define the accommodating space 10a.

[0124] Specifically, the first body 111 and the second body 121 extend in directions away from each other, respectively, thereby forming a first recess 111a and a second recess 121a on the side facing each other, and forming a first convex portion 111b and a second convex portion 121b on the side away from each other. When the first body 111 and the second body 121 are covered, the first recess 111a and the second recess 121a are combined to form a accommodating space 10a.

[0125] The first annular flange 112 and the second annular flange 122 not only provide a positioning basis for the first body 111 and the second body 121, facilitating quick alignment thereof, but also, when the battery device 100 is collided or squeezed, the first annular flange 112 and the second annular flange 122 can disperse the impact force, thereby reducing the risk of damage to the battery device 100.

[0126] Among them, the fastener 13 is passed through the first annular flange 112 and the second annular flange 122, the first protective member 31 is arranged on the side of the first annular flange 112 away from the second annular flange 122, and the second protective member 32 is arranged on the side of the second annular flange 122 away from the first annular flange 112.

[0127] Specifically, the first annular flange 112 and the second annular flange 122 are both provided with connecting holes. When covering the first body 111 and the second body 121, the first annular flange 112 and the second annular flange 122 can be aligned first so that the connecting holes set on the two are aligned, and then the fastener 13 can be passed through the two connecting holes to complete the connection between the first box body 11 and the second box body 12.

[0128] In the above technical solution, by configuring the first box body 11 to include a first annular flange 112 and configuring the second box body 12 to include a second annular flange 122, on the one hand, a positioning basis is provided for the covering of the first body 111 and the second body 121, facilitating the fastener 13 to connect the first box body 11 and the second box body 12; on the other hand, when the battery device 100 is collided or squeezed, the first annular flange 112 and the second annular flange 122 can disperse the impact force and reduce the risk of damage to the battery device 100.

[0129] Reference Figure 1 The present application provides an electric device 400, which includes the battery device 100 in the above embodiment. When the electric device 400 is working, it can be powered by the battery device 100.

[0130] The electrical device 400 of the embodiment of the present application can be used normally by configuring the electrical device 400 to include the battery device 100 in the above embodiment. At the same time, the battery device 100 in the above embodiment improves the reliability of the battery device 100 through the protective structure 30. Therefore, the electrical device 400 including the battery device 100 in the above embodiment has good reliability.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box assembly (10) comprises a first box (11) and a second box (12) covering each other, wherein the first box (11) and the second box (12) are connected via a fastener (13) and together define a receiving space (10a); A plurality of battery cells (20) are arranged in the accommodation space (10a); The protective structure (30) comprises a first protective member (31) and a second protective member (32), wherein the first protective member (31) and the second protective member (32) are both provided on the box assembly (10) and respectively cover both ends of the fastener (13).

2. The battery device according to claim 1, wherein: The first box body (11) and the second box body (12) each have a mounting surface (10b) for mounting the fastener (13) on one side away from the other, and both ends of the fastener (13) protrude from the corresponding mounting surface (10b); Each of the first protective member (31) and the second protective member (32) includes a main body (33), the main body (33) including an end wall (331) and a surrounding wall (332), the end wall (331) being provided at the end of the fastener (13), and the surrounding wall (332) being connected to the peripheral side of the fastener (13) and connected to the mounting surface (10b).

3. The battery device according to claim 2, characterized in that Each of the first protective member (31) and the second protective member (32) further includes a connecting portion (34), the connecting portion (34) surrounding the outside of the main body portion (33) and connected to the surrounding wall (332), and the connecting portion (34) is connected to the mounting surface (10b).

4. The battery device according to claim 3, characterized in that The projection area of ​​the main body (33) on the mounting surface (10b) is S1, the projection area of ​​the connection portion (34) on the mounting surface (10b) is S2, and the sum of S1 and S2 is 1.5-4 times that of S1.

5. The battery device according to claim 1, wherein: Each of the first protective member (31) and the second protective member (32) has a dimension in the length direction of the box assembly (10) less than or equal to 50 mm, a dimension in the width direction of the box assembly (10) less than or equal to 50 mm, and a dimension in the height direction of the box assembly (10) less than or equal to 10 mm.

6. The battery device according to claim 1, wherein: The number of the fasteners (13) and the protective structures (30) are both multiple, the multiple fasteners (13) are arranged circumferentially of the box assembly (10), and the multiple protective structures (30) correspond to the multiple fasteners (13) in one-to-one position.

7. The battery device according to claim 6, characterized in that The plurality of protective structures (30) are independently arranged, and in each protective structure (30), the first protective member (31) and the second protective member (32) are independently arranged.

8. The battery device according to claim 6, characterized in that The first protection parts (31) of at least two adjacently arranged protection structures (30) are integrally formed.

9. The battery device according to claim 6, characterized in that The second protection parts (32) of at least two adjacently arranged protection structures (30) are integrally formed.

10. The battery device according to claim 1, wherein: The protective structure (30) further includes a connecting member (35), wherein the connecting member (35) is located on the peripheral side of the box assembly (10) and is connected between the first protective member (31) and the second protective member (32).

11. The battery device according to claim 10, characterized in that The first protective member (31), the second protective member (32) and the connecting member (35) are integrally formed.

12. The battery device according to claim 1, wherein: At least one of the first protective member (31) and the second protective member (32) comprises an anti-corrosion glue, and the anti-corrosion glue is coated on at least the outer surface of the fastener (13).

13. The battery device according to claim 1, wherein: At least one of the first protective member (31) and the second protective member (32) comprises an anti-corrosion sheet, and the anti-corrosion sheet is bonded to the box assembly (10) and the fastener (13).

14. The battery device according to any one of claims 1 to 13, characterized in that: The first box body (11) comprises a first body (111) and a first annular flange (112), wherein the first annular flange (112) extends along the circumference of the first body (111); the second box body (12) comprises a second body (121) and a second annular flange (122), wherein the second annular flange (122) extends along the circumference of the second body (121); the first body (111) and the second body (121) jointly define the accommodating space (10a); The fastener (13) is provided through the first annular flange (112) and the second annular flange (122), the first protective member (31) is provided on a side of the first annular flange (112) facing away from the second annular flange (122), and the second protective member (32) is provided on a side of the second annular flange (122) facing away from the first annular flange (112).

15. An electrical device, characterized in that: Comprising a battery device (100) according to any one of claims 1 to 14.

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