Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery monomer, a box body and a sealing 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 enclose to form an accommodating space for accommodating the battery monomers. A sealing area is formed on the joint face of the first box body part and the second box body part and comprises a joint part and a non-joint part, the first box body part makes contact with the second box body part to form the joint part, and a groove is formed in the non-joint part of the surface, facing the second box body part, of the first box body part. The sealing assembly comprises sealant and fasteners, the sealant is arranged in the groove so as to seal the non-attaching part, and the fasteners are arranged on the attaching part so as to connect the first box body part and the second box body part. The sealing is used for sealing the two parts of the box body, a rigid sealing structure is formed after curing, the local rigidity is improved, and therefore the overall rigidity of the box body is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] With the development of new energy technology, the application of battery is more and more widely, for example, it is applied to mobile phone, notebook computer, electric car, electric vehicle, electric aircraft, electric ship, electric toy car, electric toy ship, electric tool, etc.

[0003] At present, the connection between the battery boxes is fixed by bolts and sealing gaskets, and the sealing gasket has low rigidity, which leads to insufficient local rigidity of the box. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery device and an electric equipment, which uses a sealing assembly to seal the two parts of the box, forms a rigid sealing structure after curing, improves the local rigidity, and improves the overall rigidity of the box.

[0005] In the first aspect, the present application provides a battery device, which comprises a battery monomer, a box and a sealing assembly. The box comprises a first box part and a second box part, and the first box part and the second box part jointly enclose a containing space containing the battery monomer. The joint surface of the first box part and the second box part forms a sealing area, which comprises a fitting part and a non-fitting part. The first box part and the second box part contact to form the fitting part, and the surface of the first box part facing the second box part forms a groove at the non-fitting part. The sealing assembly comprises sealing glue and fasteners. The sealing glue is arranged in the groove to seal the non-fitting part, and the fasteners are arranged in the fitting part to connect the first box part and the second box part.

[0006] In the technical scheme of the embodiment of the application, the battery monomer is arranged in the sealed box, which can provide a stable working environment for the battery monomer and reduce damage of impurities and moisture in the outside environment to the battery monomer. The fitting part and the non-fitting part on the opposite joint surface of the first box part and the second box part form a double sealing structure. The non-fitting part is provided with a groove, which provides a containing space for the sealing glue, increases the settable volume of the sealing glue, and improves the sealing strength. The fastener is arranged on the fitting part, which improves the connection strength and sealing performance between the first box part and the second box part. The sealing glue has flexibility when being coated, can fully fill the gap between the first box part and the second box part, and has strong rigidity after being solidified. The setting of the sealing glue has the filling performance of the flexible sealing gasket and the strength of the rigid structure. The setting of the plurality of fasteners can not only increase the connection strength between the box components and prevent the box from loosening and separating due to factors such as vibration and impact during use, but also can assist in sealing, so that the fitting part is more tightly connected and the possibility of leakage is reduced. After the sealing glue is solidified and the plurality of fasteners are locked, the first box part and the second box part are rigidly and sealingly connected. The double rigid sealing connection structure further improves the structural connection strength and sealing performance between the box components. The rigid connection can better resist the mechanical stress of the outside environment and maintain the stability of the sealed state, thereby prolonging the effective sealing life.

[0007] In some embodiments, the fitting part and the non-fitting part are arranged in a ring shape along the periphery of the box, and the non-fitting part is closer to the containing space than the fitting part. In the above structure, the fitting part arranged in a ring shape along the periphery of the box connects the first box part and the second box part through the plurality of fasteners, which can uniformly distribute the connection force on the entire box joint surface. This uniform stress distribution can reduce local stress concentration, reduce deformation or damage of the box due to uneven stress, and improve the overall structural strength and stability of the box. The sealing glue of the non-fitting part also has certain strength and rigidity after being solidified.

[0008] In some embodiments, the outer part of the fastener is further covered with a first anticorrosion layer, and the first anticorrosion layer comprises a first subpart and a second subpart. The first subpart is arranged on the surface of the first box part corresponding to the fastener connection position, and the second subpart is arranged on the surface of the second box part corresponding to the fastener connection position. In the above structure, the first subpart and the second subpart are arranged on the surfaces of the first box part and the second box part corresponding to the fastener connection position, respectively, which further expands the anticorrosion range. Not only the fastener itself is protected, but also the connection area of the fastener and the box part is protected.

[0009] In some embodiments, the linear distance L between two adjacent fasteners is: 60mm≤L≤100mm. In the above structure, a proper distance between fasteners helps to form a uniform and effective sealing pressure distribution at the junction of the box. When L is in the range of 60mm-100mm, the sealing glue or gasket can be sufficiently extruded between adjacent fasteners, ensuring that the sealing material tightly fills the gap of the box joint surface, effectively preventing external moisture, dust and other impurities from entering the battery containing space, maintaining the dryness and cleanliness of the internal environment, thereby protecting the battery monomer from the external environment, improving the service life and safety of the battery.

[0010] In some embodiments, the maximum depth H of the groove along the thickness direction of the first box part is: 1.0mm≤H≤1.5mm. In the above structure, when the groove depth H is between 1.0mm-1.5mm, a suitable accommodation space can be provided for the sealing glue. A too shallow groove (H<1.0mm) can result in insufficient filling of the sealing glue, and when the box is subjected to vibration or temperature change, the sealing glue is easily extruded or gaps are generated due to stress, thereby reducing the sealing effect. While a too deep groove (H>1.5mm) can cause the sealing glue to generate excessive shrinkage stress during curing, resulting in a decrease in the adhesion of the sealing glue to the surface of the box, also affecting the sealing performance. This depth range enables the sealing glue to fully fill the groove and form a good sealing layer, effectively preventing external moisture, dust and other impurities from entering the battery interior, ensuring the safe operation of the battery.

[0011] In some embodiments, the width W of the groove along the direction of the non-adhesion part towards the adhesion part is: 5mm≤W≤10mm. In the above structure, when the groove width W is between 5mm-10mm, this width range can ensure that the sealing glue can both fully fill the groove and form a good sealing layer, and also ensure reliable bonding of the sealing glue to the box, effectively preventing external moisture, dust and other impurities from entering the battery interior. The width range of 5mm-10mm enables the sealing structure to maintain good sealing performance when subjected to a certain displacement, improving the reliability of the battery box.

[0012] In some embodiments, the sealing assembly further comprises a first sealing member arranged at the edge of the first box part and the second box part and located at the side of the abutting part away from the accommodation space, wherein at least part of the first sealing member is clamped between the first box part and the second box part. In the above structure, the entry of impurities from the edge gap of the box joint can be effectively prevented, and the box interior is provided with basic and key protection. During manufacturing, assembly and use, the edge sealing surface of the first box part and the second box part can have slight deformation or unevenness. The first sealing member is clamped between the two box parts and has certain elasticity and compressibility, which can adapt to these slight changes through its own deformation, fill the gap between the sealing surfaces, and always maintain good sealing contact to ensure the stability of the sealing performance.

[0013] In some embodiments, the first box part comprises a first body and a first sealing part. The first body has an opening, and the first sealing part is arranged along the circumference of the opening of the first body. The first sealing part comprises a first plate body bent outward relative to the first body, a bent plate connected to the first plate body and bent relative to the first plate body, and an abutting part connected to the bent plate. The first plate body and the bent plate enclose a groove, the abutting part contacts the second box part to form an abutting part, and the fastener is connected between the abutting part and the second box part. In the above structure, when the box is subjected to external force, the stress will not be concentrated on a certain point or a straight line, but will be gradually dispersed to the entire first sealing part through the bent structure, reducing the risk of structural damage caused by stress concentration and improving the fatigue life of the box. The abutting part contacts the second box part to form an abutting part, and is connected through a fastener. The fixed mode through the fastener can provide more durable and stable sealing pressure, ensuring that the box can maintain good sealing performance even under harsh working conditions such as vibration and temperature change during long-term use.

[0014] In some embodiments, the sealing assembly comprises a first sealing segment and a second sealing segment distributed along the circumference of the box, both of which are local segments of annular structure, and the interval position of the two sealing segments forms a mounting area; the box further comprises a mounting assembly arranged in the mounting area, and the mounting assembly is fixed to the first box part or the second box part and protrudes outward along the box. In the above structure, the mounting assembly is arranged in the mounting area formed by the interval of the two sealing segments, realizing the organic integration of the sealing function and the mounting function. This design does not need to open a special mounting space on the box, making the overall structure of the box more compact and simple, which is conducive to reducing the floor area and weight of the box and improving the portability and maneuverability of the equipment.

[0015] In some embodiments, the joint surface of the first cabinet part and the second cabinet part forms a wrapping area at the mounting area, and the edge of the first cabinet part is extended and bent to the side of the second cabinet part away from the first cabinet part. In the above structure, the bending and torsional stiffness of the mounting area can be improved, and local stress concentration can be reduced.

[0016] In some embodiments, the part of the first cabinet part beyond the edge of the second cabinet part forms a bending area, and the bending area forms a bending part after being bent. A glue-containing groove is formed between the bending part and the second cabinet part, and the glue-containing groove is filled with a second sealing member. In the above structure, the invasion of external moisture, dust, gas and other media into the cabinet can be effectively blocked. After the edge of the first cabinet part is bent and covers the second cabinet part, the path and difficulty of the media entering the cabinet are increased. Even if the sealing member at the joint surface has a slight leakage, the wrapping structure can prevent the media from further spreading to a certain extent, thereby providing more reliable sealing protection for the cabinet.

[0017] In some embodiments, the width Q of the glue-containing groove is 2.0mm≤Q≤5.0mm, where the width Q is the length of the first cabinet part extending beyond the edge of the second cabinet part. In the above structure, when the width Q of the glue-containing groove is within the range of 2.0mm-5.0mm, an appropriate and stable amount of sealing glue can be filled in the joint surface, thereby effectively preventing external moisture, dust, gas and other media from entering the cabinet interior and ensuring good sealing performance.

[0018] In some embodiments, the surface of the bending area of the first cabinet part is provided with a second corrosion-resistant layer. In the above structure, due to the special geometric shape of the bending area, the bending area is more prone to accumulate moisture, dust and corrosive substances compared to other flat parts of the cabinet. The second corrosion-resistant layer can be used to protect this weak area, effectively prevent external corrosive media (such as moisture, oxygen, salt spray, chemical gas, etc.) from directly contacting the metal substrate of the bending area, thereby reducing the risk of electrochemical corrosion and chemical corrosion of the bending area.

[0019] In some embodiments, a third sealing member is further arranged between the end edge of the bending part and the joint surface of the second cabinet part. In the above structure, the joint surface between the bending part of the first cabinet part and the second cabinet part is still uneven and has gaps at the microscopic level due to the limitations of processing technology and material properties during processing and manufacturing. The third sealing member can effectively fill these microscopic gaps and prevent external moisture, dust, gas and other media from entering the cabinet interior through these gaps, thereby improving the overall sealing performance of the cabinet.

[0020] In some embodiments, a first positioning hole is arranged on the first box part, and a second positioning hole is arranged on the second box part correspondingly. The sealing assembly further comprises a positioning pin, which sequentially passes through the first positioning hole and the second positioning hole to limit the relative movement of the first box part and the second box part. In the above structure, when the first box part and the second box part are assembled, the cooperation of the positioning pin and the first and second positioning holes provides accurate guidance for the assembly process. The sealing member can form a uniform and continuous sealing layer on the sealing surface under the constraint of the positioning holes, further improving the reliability and stability of the sealing.

[0021] In some embodiments, the diameter of the first positioning hole is not equal to the diameter of the second positioning hole, and the difference between the diameters of the two is within a preset range. In the above structure, the positioning holes with different diameters are used in cooperation with the positioning pin, which can provide more accurate guidance at the initial stage of assembly, thereby reducing the risk of assembly failure and product quality problems caused by misassembly.

[0022] In some embodiments, the number of first positioning holes is multiple, and the multiple first positioning holes are arranged on the first box part at intervals, and the second positioning hole is correspondingly arranged multiple times. In the above structure, multiple positioning holes are equivalent to establishing multiple positioning reference points between the first box part and the second box part, reducing the positional deviation and angular deviation in the assembly process, making the assembly more accurate.

[0023] In a second aspect, the application provides a power-consuming device comprising the battery device in the above embodiments, and the battery device is used to provide electric energy.

[0024] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0025] The features, advantages and technical effects of the exemplary embodiments of the application will be described below with reference to the accompanying drawings.

[0026] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the application;

[0027] Figure 2 The structural schematic diagram of a battery device is provided for some embodiments of the application;

[0028] Figure 3 The structural schematic diagram of a box is provided for some embodiments of the application;

[0029] Figure 4 The structural schematic diagram of a box is provided for some embodiments of the application; Figure 3 The cross-sectional structural schematic diagram of part A-A in the middle;

[0030] Figure 5 Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application; Figure 3 Figure 2 is a schematic diagram of an enlarged structure of a B part in Figure 1;

[0031] Figure 6 Figure 3 is a schematic diagram of a partial structure of an upper box body provided by some embodiments of the present application;

[0032] Figure 7 Figure 4 is a schematic diagram of an enlarged structure of a C-C part in Figure 1; Figure 3

[0033] Figure 5 is a schematic diagram of an enlarged structure of a D part in Figure 1; Figure 8 Figure 7 Figure 6 is a schematic diagram of an enlarged structure of an E part in Figure 1;

[0034] Figure 9 Figure 3 Figure 7 is a schematic diagram of an enlarged structure of an F-F part in Figure 1.

[0035] Figure 10 Figure 8 is a schematic diagram of a cross-sectional structure of a G-G part in Figure 1. Figure 9

[0036] Detailed description of reference signs

[0037] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Box body; 5a. First box body part; 5b. Second box body part; 5c. Containing space; 501. Fitting part; 502. Non-fitting part; 503. Groove; 504. First body; 505. First sealing part; 506. First plate body; 507. Bending plate; 508. Fitting part; 509. Hanging area; 510. Hanging assembly; 511. Edge covering area; 512. Bending part; 513. First positioning hole; 514. Second positioning hole; 6. Battery monomer; 7. Sealing assembly; 701. Sealing glue; 702. Fastener; 703. First anticorrosion layer; 704. First subpart; 705. Second subpart; 706. First sealing piece; 707. First sealing section; 708. Second sealing section; 709. Second sealing piece; 710. Second anticorrosion layer; 711. Third sealing piece. DETAILED DESCRIPTION

[0038] The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0039] ​​​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0041] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The occurrence of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment, to the exclusion of other embodiments. It is explicitly and implicitly understood that the embodiments described herein are capable of combination.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mount", "connect", "connect", "fix", and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In the embodiments of the present application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the present application.

[0047] "Multiple" appearing in the present application means two or more (including two).

[0048] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery type that can be activated by charging after the battery cell is discharged.

[0049] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0050] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0051] In some embodiments, the battery cell can include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure, or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and the housing and the electrode assembly further include a sealing bag for packaging the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to package the electrode assembly and the electrolyte, etc.

[0052] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shaped battery cell, the prismatic battery cell including a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, and the like, without particular limitation.

[0053] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap covers the opening. The shell can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0054] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collecting member. The electrode terminal can be provided on the end cap or on the shell.

[0055] In a battery device, the box body includes a main body part and a box cover part, and the main body and the box cover are usually connected by a pull nut, a bolt, and a sealing gasket sandwiched between the main body and the box cover for sealing. The pull nut is pulled on the box body and fixedly connected by a nut. The box cover holds the sealing gasket, the bolt passes through the box cover and the sealing gasket and is locked with the pull nut, and the box cover compresses the sealing gasket to seal the box body. However, the sealing gasket is a flexible structure, and the sealing area is relatively weak in rigidity, so it needs to be improved.

[0056] In view of this, the present application provides a battery device, the fitting part and the non-fitting part on the opposite joint surface of the first box body part and the second box body part are formed with a double sealing structure. The non-fitting part is formed with a groove, which provides a space for the sealing glue, increases the available volume of the sealing glue, and improves the sealing strength. The fastener is arranged on the fitting part, which improves the connection strength and sealing performance between the first box body part and the second box body part. The sealing glue has fluidity when applied, can fully fill the gap between the first box body part and the second box body part, and has strong rigidity after solidification. The setting of the sealing glue has the filling performance of the flexible sealing gasket and the strength of the rigid structure. The setting of multiple fasteners not only can enhance the connection strength between the box body parts, prevent the box body from loosening and separating due to vibration, impact and other factors during use, but also can assist in sealing, make the fitting part more tightly, and reduce the possibility of leakage. After the sealing glue is solidified and the multiple fasteners are locked, the first box body part and the second box body part are rigidly and sealingly connected. The double rigid sealing connection structure further improves the structural connection strength and sealing performance between the box body parts. The rigid connection can better resist external mechanical stress and maintain the stability of the sealing state, thereby prolonging the effective sealing life.

[0057] The battery device mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0058] In some embodiments, the battery device can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0059] As an example, the battery module can be accommodated in the box by being fixed in the box.

[0060] As an example, the battery cell assembly can also be accommodated in the box by being directly fixed to the box.

[0061] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0062] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles, and spaceships, etc.

[0063] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended-range car, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spaceship, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not specially limit the above electric devices.

[0064] The following embodiments take the vehicle as an example for convenience of illustration.

[0065] Figure 1 The structural schematic diagram of the vehicle provided in some embodiments of the present application.

[0066] As shown in Figure 1, 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.

[0067] Vehicle 1 may also include controller 3 and motor 4. Controller 3 is used to control battery device 2 to supply power to motor 4, for example, for the power needs of vehicle 1 during start-up, navigation and driving.

[0068] 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.

[0069] Figure 2 This is a schematic diagram of a battery explosion provided for some embodiments of this application. For example... Figure 2 As shown, the battery device 2 includes a housing 5 and battery cells 6, with the battery cells 6 housed within the housing 5. The battery cell 6 can be the smallest unit constituting the battery device 2.

[0070] The housing 5 is used to house the battery cell 6, and the housing 5 can have various structures. In some embodiments, the housing 5 may include a first housing portion 5a and a second housing portion 5b, which overlap each other, and together define a housing space 5c for housing the battery cell 6. The second housing portion 5b may be a hollow structure with one end open, and the first housing portion 5a may be a plate-like structure, covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c; alternatively, both the first housing portion 5a and the second housing portion 5b may be hollow structures with one side open, with the open side of the first housing portion 5a covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c. Of course, the first housing portion 5a and the second housing portion 5b can be various shapes, such as cylinders, cuboids, etc.

[0071] In the battery device 2, multiple battery cells 6 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.

[0072] Multiple battery cells 6 can be directly connected in series, parallel, or in a mixed manner, and then the whole composed of multiple battery cells 6 can be housed in the housing 5; of course, multiple battery cells 6 can also be connected in series, parallel, or in a mixed manner to form a battery module, and multiple battery modules can then be connected in series, parallel, or in a mixed manner to form a whole, and housed in the housing 5.

[0073] Please refer to the reference. Figures 2 to 5, Figure 2 A structural schematic diagram of a battery device provided for some embodiments of the present application, Figure 3 A structural schematic diagram of a box provided for some embodiments of the present application, Figure 4 A structural schematic diagram of a box provided for some embodiments of the present application, Figure 3 A cross-sectional structural schematic diagram of part A-A in FIG. 1, Figure 5 A structural schematic diagram of part B in FIG. 1, Figure 3 A structural schematic diagram of part B in FIG. 1.

[0074] As shown in the figure, embodiments of the present application provide a battery device 2, which includes a battery cell 6, a box 5, and a sealing assembly 7. The box 5 includes a first box part 5a and a second box part 5b, which together enclose a containing space 5c containing the battery cell 6. The joint surface of the first box part 5a and the second box part 5b forms a sealing area, which includes a fitted part 501 and a non-fitted part 502. The first box part 5a and the second box part 5b are in contact to form the fitted part 501, and the surface of the first box part 5a facing the second box part 5b forms a groove 503 at the non-fitted part 502. The sealing assembly 7 includes a sealing glue 701 and fasteners 702. The sealing glue 701 is arranged in the groove 503 to seal the non-fitted part 502, and the fasteners 702 are arranged at the fitted part 501 to connect the first box part 5a and the second box part 5b.

[0075] When assembling the box 5, the sealing glue 701 can be applied in the groove 503 or the corresponding non-fitted part 508 of the second box part 5b first, then the first box part 5a and the second box part 5b are positioned in cooperation, and finally the fasteners 702 are fixed at the fitted part 501. For example, the sealing glue 701 can be any one of silicone sealing glue 701, polyurethane sealing glue 701, epoxy resin sealing glue 701, acrylate sealing glue 701, fluororubber sealing glue 701, or butyl rubber sealing glue 701. The fasteners 702 can include any one of self-tapping screws, pull rivets, or self-piercing riveting (SPR). Among them, the SPR occupies less space in the height direction, and has high connection efficiency and connection strength.

[0076] In the technical solution of the embodiment of the application, the battery monomer 6 is arranged in the sealed box 5, which can provide a stable working environment for the battery monomer 6 and reduce damage of impurities and moisture in the outside environment to the battery monomer 6. The fitting part 501 and the non-fitting part 502 on the opposite joint surface of the first box part 5a and the second box part 5b are formed with a double sealing structure. The non-fitting part 502 is formed with a groove 503, which provides a containing space for the sealing glue 701, increases the settable volume of the sealing glue 701, and improves the sealing strength. The fastener 702 is arranged on the fitting part 501, which improves the connection strength and sealing performance between the first box part 5a and the second box part 5b.

[0077] The sealing glue 701 has fluidity when being coated, can fully fill the gap between the first box part 5a and the second box part 5b, and has strong rigidity after being solidified. The arrangement of the sealing glue 701 has the filling performance of the flexible sealing gasket and the strength of the rigid structure. The arrangement of the plurality of fasteners 702 can not only increase the connection strength between the box 5 components, prevent the box 5 from loosening and separating due to factors such as vibration and impact during use, but also assist in sealing, so that the fitting part 501 is more tightly connected, and the possibility of leakage is reduced. After the sealing glue 701 is solidified and the plurality of fasteners 702 are locked, the first box part 5a and the second box part 5b are rigidly and sealingly connected. The double rigid sealing connection structure further improves the structural connection strength and sealing performance between the box 5 components. The rigid connection can better resist external mechanical stress and maintain the stability of the sealed state, thereby prolonging the effective sealing life.

[0078] In some embodiments of the application, the fitting part 501 and the non-fitting part 502 are arranged in a ring shape along the periphery of the box 5, and the non-fitting part 502 is closer to the containing space 5c than the fitting part 501.

[0079] In the above structure, the fitting part 501 arranged in a ring shape along the periphery of the box 5 connects the first box part 5a and the second box part 5b through the plurality of fasteners 702, which can uniformly distribute the connection force on the entire joint surface of the box 5. This uniform stress distribution can avoid local stress concentration, reduce deformation or damage of the box 5 due to uneven stress, and improve the overall structural strength and stability of the box 5. The sealing glue 701 of the non-fitting part 502 also has certain strength and rigidity after being solidified. It cooperates with the fastener 702 of the fitting part 501 to jointly enhance the connection between the first box part 5a and the second box part 5b. When the box 5 is subjected to external mechanical force, the sealing glue 701 and the fastener 702 can jointly bear and disperse the stress, further improve the impact resistance and vibration resistance of the box 5, and ensure the safety of the battery monomer 6 in a complex working environment.

[0080] In some embodiments of the present application, the outer part of the fastener 702 is further covered by a first anticorrosion layer 703, which comprises a first sub-portion 704 and a second sub-portion 705. The first sub-portion 704 is arranged on the surface of the first case portion 5a corresponding to the connection position of the fastener 702, and the second sub-portion 705 is arranged on the surface of the second case portion 5b corresponding to the connection position of the fastener 702.

[0081] In the above structure, the first sub-portion 704 and the second sub-portion 705 are arranged on the surfaces of the first case portion 5a and the second case portion 5b corresponding to the connection positions of the fasteners 702, respectively, further expanding the anticorrosion range. Not only the fasteners 702 themselves are protected, but also the connection areas of the fasteners 702 and the case 5 are protected. Because the connection areas are often places where stress is concentrated and small gaps are prone to occur, and corrosive media are more likely to accumulate, the arrangement of the first sub-portion 704 and the second sub-portion 705 can prevent corrosion from spreading from the connection areas, ensuring the integrity of the entire connection structure. The first anticorrosion layer 703 and the sealing assembly 7 (the sealant 701 and the fastener 702) together constitute a more perfect sealing system. The sealant 701 is mainly responsible for sealing the non-adhesion part 502, and the fastener 702 ensures the tight connection of the adhesion part 501 through the protection of the first anticorrosion layer 703. The two work together to improve the sealing performance of the entire case 5. The presence of the first anticorrosion layer 703 enables the sealing structure to better resist the influence of the external environment during long-term use, maintaining the stability and durability of the sealing effect.

[0082] As shown in Figure 5 In some embodiments of the present application, the straight-line distance L between two adjacent fasteners 702 is 60mm≤L≤100mm. In the above structure, a suitable distance between the fasteners 702 helps to form a uniform and effective sealing pressure distribution at the connection of the case 5.

[0083] The distance between the two fasteners 702 at the straight-line segment is L1, and the straight-line distance between the two fasteners 702 at the curved segment is L2. Optionally, L1>L2. Exemplarily, L1=100mm and L2=60mm.

[0084] When L is within the range of 60mm-100mm, the sealant 701 or the gasket can be sufficiently extruded between the adjacent fasteners 702, ensuring that the sealing material tightly fills the gaps of the joint surface of the case 5, effectively preventing external moisture, dust and other impurities from entering the battery containing space 5c, maintaining the dryness and cleanliness of the internal environment, thereby protecting the battery monomer 6 from the external environment, and improving the service life and safety of the battery.

[0085] In some embodiments of this application, the maximum depth H of the groove 503 along the thickness direction of the first housing portion 5a is: 1.0mm≤H≤1.5mm.

[0086] In the above structure, when the depth H of the groove 503 is between 1.0mm and 1.5mm, it provides a suitable accommodating space 5c for the sealant 701. A groove 503 that is too shallow (H < 1.0mm) may result in insufficient filling of the sealant 701. When the housing 5 is subjected to vibration or temperature changes, the sealant 701 is easily squeezed out or gaps are formed due to stress, thus reducing the sealing effect. Conversely, a groove 503 that is too deep (H > 1.5mm) may cause excessive shrinkage stress in the sealant 701 during curing, leading to a decrease in the adhesion between the sealant 701 and the surface of the housing 5, also affecting the sealing performance. This depth range allows the sealant 701 to fully fill the groove 503, forming a good sealing layer that effectively prevents external moisture, dust, and other impurities from entering the battery, ensuring the safe operation of the battery.

[0087] In some embodiments of this application, the width W of the groove 503 is: 5mm≤W≤10mm along the direction from the non-adhesive portion 508 toward the adhesive portion 508.

[0088] In the above structure, when the width W of the groove 503 is between 5mm and 10mm, it provides a suitable volume for the sealant 701. If the width is too small (W < 5mm), the filling amount of the sealant 701 will be limited. When the housing 5 is affected by vibration, temperature changes, etc., the sealant 701 may crack or fall off due to insufficient stress buffering, leading to seal failure. If the width is too large (W > 10mm), although the filling amount of the sealant 701 increases, it may cause the sealant 701 to generate large shrinkage stress during the curing process, affecting the adhesion between the sealant 701 and the surface of the housing 5, which is also detrimental to sealing. This width range ensures that the sealant 701 can fully fill the groove 503 to form a good sealing layer, and also ensures reliable adhesion between the sealant 701 and the housing 5, effectively preventing external moisture, dust, and other impurities from entering the battery. The width range of 5mm-10mm allows the sealing structure to maintain good sealing performance even when subjected to a certain displacement, improving the reliability of the battery housing 5.

[0089] like Figure 4 As shown, in some embodiments of this application, the sealing assembly 7 further includes a first sealing member 706, which is disposed at the edge of the first housing portion 5a and the second housing portion 5b, and located on the side of the fitting portion 501 away from the receiving space 5c, wherein at least a portion of the first sealing member 706 is sandwiched between the first housing portion 5a and the second housing portion 5b.

[0090] In the above structure, the first seal 706 is arranged at the edge position of the first housing part 5a and the second housing part 5b, and is located at the side of the joint part 501 away from the accommodation space 5c, so as to form a reliable primary sealing barrier outside the housing 5. When the moisture, dust, impurities and the like in the external environment attempt to invade the inside of the housing 5, they will first be blocked by the first seal 706. This edge position sealing design can effectively prevent impurities from entering from the edge gap of the joint of the housing 5, and provides basic and key protection for the inside of the housing 5. In addition, the edge sealing surface of the first housing part 5a and the second housing part 5b may be slightly deformed or uneven during manufacturing, assembly and use. The first seal 706 is clamped between the two housing 5 parts, has a certain elasticity and compressibility, and can adapt to these small changes by deforming itself, fill the gap between the sealing surfaces, and always maintain good sealing contact to ensure the stability of the sealing performance.

[0091] As shown in Figure 3 and Figure 6 In some embodiments of the present application, the first housing part 5a includes a first body 504 and a first sealing part 505. The first body 504 has an opening, and the first sealing part 505 is arranged around the opening of the first body 504 in the circumferential direction. The first sealing part 505 includes a first plate body 506 bent outwardly relative to the first body 504, a bent plate 507 connected to the first plate body 506 and bent relative to the first plate body 506, and a joint part 508 connected to the bent plate 507. The first plate body 506 and the bent plate 507 enclose a groove 503, the joint part 508 contacts the second housing part 5b to form a joint part 501, and the fastener 702 is connected between the joint part 508 and the second housing part 5b.

[0092] For example, the first body 504 can include a plurality of side plates and a top plate, the plurality of side plates are connected in sequence, the plurality of side plates are connected to the top plate, and the top plate is arranged opposite to the second housing part 5b.

[0093] In the above structure, the first sealing part 505 is arranged along the circumference of the first body 504, forming a continuous sealing line. The groove 503 formed by the first plate body 506 and the bending plate 507 can form a multi-stage sealing effect when cooperating with other components (such as a sealing strip or sealing glue 701, etc.). The first plate body 506 is bent outwardly relative to the first body 504, and the bending plate 507 is bent relative to the first plate body 506. This smooth bending transition design can effectively disperse stress. When the box 5 is subjected to external force, the stress will not be concentrated on a certain point or a straight line, but will be gradually dispersed to the entire first sealing part 505 through the bending structure, reducing the risk of structural damage caused by stress concentration and improving the fatigue life of the box 5. The fitting part 508 contacts the second box part 5b to form a fitting part 501, and is connected by a fastener 702. The fixed mode by the fastener 702 can provide more durable and stable sealing pressure, ensuring good sealing performance even under harsh working conditions such as vibration and temperature change during long-term use.

[0094] As shown in Figure 3 and Figure 7 In some embodiments of the present application, the sealing assembly 7 includes a first sealing segment 707 and a second sealing segment 708 distributed circumferentially along the box 5. The first sealing segment 707 and the second sealing segment 708 are both local segments of annular structure, and the mounting area 509 is formed at the spaced position in the circumferential direction. The box 5 further includes a mounting assembly 510 arranged in the mounting area 509. The mounting assembly 510 is fixed to the first box part 5a or the second box part 5b and protrudes outwardly along the box 5.

[0095] In the above structure, the mounting assembly 510 is arranged in the mounting area 509 formed between the two sealing segments, realizing the organic integration of sealing function and mounting function. This design does not need to open a special mounting space on the box 5, avoiding the problems of increasing the volume and complicating the structure of the box 5 due to the increase of mounting structure, making the overall structure of the box 5 more compact and simple, which is beneficial to reduce the floor area and weight of the box 5 and improve the portability and maneuverability of the equipment. The mounting area 509 is arranged between the two sealing segments, making full use of the idle space on the surface of the box 5. This layout avoids the waste of space and layout disorder caused by randomly arranging mounting points on the surface of the box 5, making the space on the surface of the box 5 more reasonably and effectively utilized. At the same time, since the mounting assembly 510 is located between the sealing areas, it will not affect the normal work of the sealing segments, ensuring the stability of the sealing effect. The mounting assembly 510 protrudes radially outward along the box 5, providing convenience for the connection of external equipment. The external equipment can be conveniently fixed on the box 5 through the mounting assembly 510, and can be reasonably arranged and arranged according to needs.

[0096] As Figure 7 And Figure 8 As shown in some embodiments of the present application, in the mounting area 509, the joint surface of the first box part 5a and the second box part 5b forms a wrapping area 511, the edge of the first box part 5a is extended and bent to the side of the second box part 5b away from the first box part 5a. For example, the bent wrapping forms a "U" shaped or "L" shaped reinforcing rib, in the above structure, the bending, torsional stiffness of the mounting area 509 can be improved, and the joint surface of the box 5 can be prevented from cracking due to external load (such as vibration, impact). In addition, the stress of the mounting assembly 510 (such as the lifting lug, bracket) is transmitted to the entire box 5 through the wrapping structure, reducing local stress concentration. In addition, the wrapping can be integrally formed when the box 5 is stamped, reducing the use of additional connecting parts (such as welding, screws), and reducing assembly complexity.

[0097] In some embodiments of the present application, the part of the first box part 5a beyond the edge of the second box part 5b forms a bending area, which after bending constitutes a bent part 512, and the bent part 512 and the second box part 5b form a glue containing groove, which is filled with a second sealing member 709.

[0098] In the above structure, the edge of the first box part 5a is extended and bent to the side of the second box part 5b away from the first box part 5a to form a wrapping, which can effectively disperse stress when the box 5 is subjected to external force. In addition, the wrapping area 511 forms an additional barrier, which can effectively block the invasion of external moisture, dust, gas and other media into the inside of the box 5. The edge of the first box part 5a is bent and covers the second box part 5b, increasing the path and difficulty of the medium entering the box 5. Even if the sealing member at the joint surface leaks slightly, the wrapping structure can prevent the medium from further spreading to a certain extent, providing more reliable sealing protection for the box 5.

[0099] In some embodiments of the present application, the width Q of the glue groove is 2.0mm≤Q≤5.0mm, where the width Q is the length of the first box body part 5a extending beyond the edge of the second box body part 5b. In the above structure, when the width Q of the glue groove is within the range of 2.0mm-5.0mm, a suitable storage space can be provided for the sealant 701. If the width Q is less than 2.0mm, the amount of sealant 701 that can be accommodated in the glue groove is too small, and when the box 5 is affected by factors such as vibration and temperature change, the sealant 701 may not be able to fully fill the small gap of the joint surface, resulting in a leak. When the width Q is greater than 5.0mm, although the amount of glue increases, it may generate a larger shrinkage stress during the curing process due to excessive sealant 701, which in turn affects the sealing effect. Therefore, this width range ensures that an appropriate and stable amount of sealant 701 fills the joint surface, effectively preventing external moisture, dust, gas and other media from entering the interior of the box 5, and ensuring good sealing performance.

[0100] In some embodiments of the present application, the surface of the bending area of the first box body part 5a is provided with a second corrosion-resistant layer 710. In the above structure, due to its special geometric shape, the bending area is more prone to accumulate moisture, dust and corrosive substances compared to other flat parts of the box 5. The provision of the second corrosion-resistant layer 710 can provide special protection for this weak area, effectively blocking the direct contact between external corrosive media (such as moisture, oxygen, salt mist, chemical gas, etc.) and the metal substrate of the bending area, thereby reducing the risk of electrochemical corrosion and chemical corrosion of the bending area.

[0101] In some embodiments of the present application, a third sealing member 711 is further provided between the end edge of the bending part 512 and the abutting surface of the second box body part 5b. In the above structure, due to the limitations of processing technology level and material properties during the processing and manufacturing of the first box body part 5a bending part 512 and the second box body part 5b, there will still be microscopic unevenness and gaps between the abutting surfaces of the two. The provision of the third sealing member 711 can effectively fill these microscopic gaps, preventing external moisture, dust, gas and other media from entering the interior of the box 5 through these gaps, and improving the overall sealing performance of the box 5.

[0102] As shown in Figure 3 and Figure 9 In some embodiments of the present application, a first positioning hole 513 is provided on the first box body part 5a at the abutting part 501, and a second positioning hole 514 is provided on the second box body part 5b correspondingly. The sealing assembly 7 further comprises a positioning pin, which sequentially passes through the first positioning hole 513 and the second positioning hole 514 to limit the relative movement of the first box body part 5a and the second box body part 5b.

[0103] In the above structure, when the first box body part 5a and the second box body part 5b are assembled, the cooperation of the positioning pin and the first and second positioning holes 514 provides accurate guidance for the assembly process. The operator can quickly and accurately align the two box body parts 5, so that the abutting parts 501 of the two box body parts 5 are tightly abutted, avoiding assembly deviation caused by inaccurate manual alignment, and improving the assembly accuracy and consistency. In addition, the positioning hole and the positioning pin are arranged on the abutting part 501, and a sealing member (such as sealing glue 701, a sealing ring, etc.) is also arranged. The positioning function of the positioning hole can uniformly extrude the sealing member, so that the sealing function of the sealing member is fully played. The sealing member can form a uniform and continuous sealing layer on the sealing surface under the constraint of the positioning hole, further improving the reliability and stability of the sealing.

[0104] As shown in Figure 9 and Figure 10 In some embodiments of the present application, the hole diameter of the first positioning hole 513 is not equal to the hole diameter of the second positioning hole 514, and the difference between the hole diameters of the two is within a predetermined range.

[0105] In the above structure, the positioning holes with different hole diameters cooperate with the positioning pin to provide more accurate guidance at the initial stage of assembly. When the first box body part 5a and the second box body part 5b are butted, the positioning pin first enters the positioning hole with a larger hole diameter, which plays a preliminary guiding role, so that the approximate positions of the two box body parts 5 are quickly aligned; as the assembly progresses, the positioning pin enters the positioning hole with a smaller hole diameter, achieving more accurate positioning, improving the efficiency and accuracy of the assembly, and reducing repeated adjustments caused by inaccurate positioning. The predetermined hole diameter difference can be used as a mistake-proof design. In the scene of multi-component assembly or similar component assembly, if the hole diameters of the first positioning hole 513 and the second positioning hole 514 are designed to have a specific difference, it is difficult for the operator to assemble the components incorrectly. Because only the positioning pin and the positioning hole with matching hole diameters can cooperate smoothly, thereby avoiding assembly failures and product quality problems caused by incorrect assembly.

[0106] In some embodiments of the present application, the number of first positioning holes 513 is multiple, and multiple first positioning holes 513 are arranged at intervals on the first box body part 5a. The second positioning hole 514 is correspondingly provided with multiple second positioning holes.

[0107] In the above structure, the plurality of positioning holes correspond to establishing a plurality of positioning reference points between the first box part 5a and the second box part 5b. Compared with a single positioning hole, these reference points can constrain and position the two box parts 5 from multiple directions and angles, reducing positional and angular deviations during assembly, making assembly more accurate. Since the positions and sizes of the plurality of positioning holes are pre-designed, only when the positioning holes of the second box part 5b completely correspond to the positioning holes of the first box part 5a, the assembly can be successfully completed. This correspondence can effectively prevent the second box part 5b from being misaligned in the left-right, front-back, or up-down direction during assembly, ensuring the consistency of assembly quality.

[0108] In some alternative embodiments, the battery device 2 comprises a battery cell 6, a case 5, and a sealing assembly 7. The case 5 comprises a first case portion 5a and a second case portion 5b, which together enclose a receiving space 5c for accommodating the battery cell 6. The joint surface of the first case portion 5a and the second case portion 5b forms a sealing region, which comprises a bonded portion 501 and a non-bonded portion 502. The first case portion 5a and the second case portion 5b are in contact to form the bonded portion 501, and the surface of the first case portion 5a facing the second case portion 5b forms a groove 503 at the non-bonded portion 502. The sealing assembly 7 comprises a sealing glue 701 and fasteners 702. The sealing glue 701 is arranged in the groove 503 to seal the non-bonded portion 502, and the fasteners 702 are arranged at the bonded portion 501 to connect the first case portion 5a and the second case portion 5b. The bonded portion 501 and the non-bonded portion 502 are both annularly arranged along the periphery of the case 5, and the non-bonded portion 502 is closer to the receiving space 5c than the bonded portion 501. The fasteners 702 are further covered with a first corrosion-resistant layer 703, which comprises a first sub-portion 704 and a second sub-portion 705. The first sub-portion 704 is arranged on the surface of the first case portion 5a corresponding to the position where the fastener 702 is connected, and the second sub-portion 705 is arranged on the surface of the second case portion 5b corresponding to the position where the fastener 702 is connected. The sealing assembly 7 further comprises a first sealing member 706, which is arranged at the edge position of the first case portion 5a and the second case portion 5b and is located on the side of the bonded portion 501 away from the receiving space 5c. At least part of the first sealing member 706 is clamped between the first case portion 5a and the second case portion 5b. The sealing assembly 7 comprises a first sealing segment 707 and a second sealing segment 708 distributed along the periphery of the case 5. The first sealing segment 707 and the second sealing segment 708 are both partial segments of annular structures, and the interval positions of the two in the circumferential direction form a mounting region 509. The case 5 further comprises a mounting assembly 510 arranged at the mounting region 509. The mounting assembly 510 is fixed to the first case portion 5a or the second case portion 5b and protrudes outwardly along the case 5. At the mounting region 509, the joint surface of the first case portion 5a and the second case portion 5b forms a wrapped region 511, and the edge of the first case portion 5a is extended and bent to the side of the second case portion 5b away from the first case portion 5a. The portion of the first case portion 5a beyond the edge of the second case portion 5b forms a bending region, which after bending constitutes a bent portion 512. The bent portion 512 and the second case portion 5b form a glue-containing groove therebetween, which is filled with a second sealing member 709. The surface of the bending region of the first case portion 5a is provided with a second corrosion-resistant layer 710. The end edge of the bent portion 512 and the joint surface of the second case portion 5b are further provided with a third sealing member 711. At the bonded portion 501, a first positioning hole 513 is arranged on the first case portion 5a, and a second positioning hole 514 is correspondingly arranged on the second case portion 5b.The sealing assembly 7 further comprises a positioning pin which sequentially passes through the first positioning hole 513 and the second positioning hole 514 to limit the relative movement of the first box part 5a and the second box part 5b.

[0109] The embodiments of the present application also provide a battery device 2 as described above for providing electric energy. In the battery device 2, the abutment part 501 and the non-abutment part 502 on the abutting surface of the first box part 5a and the second box part 5b are formed with a double sealing structure. The non-abutment part 502 is formed with a groove 503 to provide a space for the sealing glue 701, increase the settable volume of the sealing glue 701, and improve the sealing strength. The fastener 702 is arranged on the abutment part 501 to improve the connection strength between the first box part 5a and the second box part 5b and the sealing performance. The sealing glue 701 has flexibility when applied and can fully fill the gap between the first box part 5a and the second box part 5b, and has strong rigidity after solidification. The arrangement of the sealing glue 701 has the filling performance of the flexible sealing gasket and the strength of the rigid structure. The arrangement of the plurality of fasteners 702 can not only increase the connection strength between the box 5 parts and prevent the box 5 from loosening and separating due to vibration, impact and other factors during use, but also assist in sealing to make the abutment part 501 more compact and reduce the possibility of leakage. After the sealing glue 701 is solidified and the plurality of fasteners 702 are locked, the first box part 5a and the second box part 5b are rigidly and sealingly connected. The double rigid sealing connection structure further improves the structural connection strength and the sealing performance between the box 5 parts. The rigid connection can better resist external mechanical stress and maintain the stability of the sealing state, thereby prolonging the effective sealing life.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present 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: Battery cell; The housing includes a first housing portion and a second housing portion, which together enclose a space for accommodating the battery cell. The mating surfaces of the first housing portion and the second housing portion form a sealed area, which includes a fitted portion and a non-fitted portion. The first housing portion and the second housing portion contact each other to form a fitted portion, and the surface of the first housing portion facing the second housing portion forms a groove in the non-fitted portion. A sealing assembly includes a sealant and fasteners. The sealant is disposed in the groove to seal the non-adhesive portion, and a plurality of fasteners are disposed in the adhesive portion to connect the first housing portion and the second housing portion.

2. The battery device according to claim 1, characterized in that, Both the fitted portion and the non-fitted portion are arranged in a ring around the perimeter of the box, and the non-fitted portion is closer to the receiving space than the fitted portion.

3. The battery device according to claim 1, characterized in that, The fastener is further covered with a first anti-corrosion layer, which includes: The first sub-part is disposed on the surface of the first housing part corresponding to the fastener connection position; The second sub-part is provided on the surface of the second housing part corresponding to the fastener connection position.

4. The battery device according to claim 1, characterized in that, The straight-line distance L between two adjacent fasteners is: 60mm≤L≤100mm.

5. The battery device according to claim 1, characterized in that, Along the thickness direction of the first housing portion, the maximum depth H of the groove is: 1.0mm≤H≤1.5mm; Along the direction from the non-adhesive portion toward the adhesive portion, the width W of the groove is: 5mm≤W≤10mm.

6. The battery device according to any one of claims 1-5, characterized in that, The sealing assembly further includes a first seal, which is disposed at the edge of the first housing portion and the second housing portion and located on the side of the fitting portion away from the receiving space, wherein at least a portion of the first seal is clamped between the first housing portion and the second housing portion.

7. The battery device according to any one of claims 1-5, characterized in that, The first housing portion includes: The first body has an opening; A first sealing portion is arranged circumferentially around the opening of the first body. The first sealing portion includes a first plate bent outward relative to the first body, a bent plate connected to the first plate and bent relative to the first plate, and a fitting portion connected to the bent plate. The first plate and the bent plate form the groove, the fitting portion contacts the second housing portion to form the fitting part, and the fastener is connected between the fitting portion and the second housing portion.

8. The battery device according to claim 7, characterized in that, The sealing assembly includes a first sealing section and a second sealing section distributed circumferentially along the housing. Both the first sealing section and the second sealing section are local sections of an annular structure, and they form a mounting area at intervals in the circumferential direction. The housing also includes a mounting assembly, which is disposed in the mounting area. The mounting assembly is fixed to the first housing part or the second housing part and protrudes outward along the housing.

9. The battery device according to claim 8, characterized in that, In the mounting area, the joint surface of the first box portion and the second box portion forms a edging area, and the edge of the first box portion extends and bends to the side of the second box portion away from the first box portion.

10. The battery device according to claim 9, characterized in that, The portion of the first housing part that extends beyond the edge of the second housing part forms a bending area. After bending, this bending area forms a bending part. An adhesive groove is formed between the bending part and the second housing part, and the adhesive groove is filled with a second sealing element.

11. The battery device according to claim 10, characterized in that, The width Q of the adhesive groove is: 2.0mm≤Q≤5.0mm, where the width Q is the length by which the first box portion extends beyond the edge of the second box portion.

12. The battery device according to claim 10, characterized in that, The bending area of ​​the first housing part is provided with a second anti-corrosion layer.

13. The battery device according to any one of claims 10-12, characterized in that, A third sealing element is also provided between the end edge of the bent portion and the mating surface of the second housing portion.

14. The battery device according to any one of claims 1-5, characterized in that, In the fitting portion, the first housing part is provided with a first positioning hole, and the second housing part is provided with a corresponding second positioning hole. The sealing assembly further includes a positioning pin, which passes through the first positioning hole and the second positioning hole in sequence to restrict the relative movement of the first housing portion and the second housing portion.

15. The battery device according to claim 14, characterized in that, The diameter of the first positioning hole is not equal to the diameter of the second positioning hole, and the difference between the two diameters is within a preset range.

16. The battery device according to claim 14, characterized in that, The number of the first positioning holes is multiple, and the multiple first positioning holes are spaced apart on the first housing part, and the corresponding number of second positioning holes is also multiple.

17. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-16, the battery device being used to provide electrical energy.

Images