Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery monomer, an output pole piece, an end plate and an insulating base, the output pole piece is electrically connected with the single battery, and the end plate is arranged on one side of the single battery along the first direction. The end plate is provided with a dovetail groove, the dovetail groove is concave inwards along the edge of the second direction of the end plate, and the first direction is perpendicular to the second direction. The insulating base is used for fixing the output pole piece, the insulating base comprises a fixing part and a dovetail convex part which is arranged on one side, facing the second direction, of the fixing part, the dovetail convex part is configured to slide into or slide out of the dovetail groove, and the insulating base is detachably mounted on the end plate through matching of the dovetail convex part and the dovetail groove. According to the technical scheme, the assembling efficiency and convenience of the insulating base can be improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are being used more and more widely, such as in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, and power tools.

[0003] In the battery assembly, the insulating base used to fix the connecting plates has an installation structure design that needs optimization. It suffers from poor installation stability and inconvenient disassembly, affecting the assembly efficiency and maintainability of the battery module. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical appliance that can improve the assembly efficiency and convenience of the insulating base.

[0005] In a first aspect, this application provides a battery device, including a battery cell, an output electrode, an end plate, and an insulating base. The output electrode is electrically connected to the battery cell, and the end plate is disposed on one side of the battery cell along a first direction. The end plate has a dovetail groove formed on the edge of the end plate in a second direction, with the first direction perpendicular to the second direction. The insulating base is used to fix the output electrode, and the insulating base includes a fixing part and a dovetail protrusion disposed on the fixing part facing the second direction. The dovetail protrusion is configured to slide into or out of the dovetail groove, and the insulating base is detachably mounted to the end plate through the cooperation of the dovetail protrusion and the dovetail groove.

[0006] In the technical solution of this application embodiment, an end plate is provided along the first direction of the battery cell. This end plate provides structural protection and constraint for the battery cell, improving the mechanical stability and safety of the battery module during operation. The output electrode is electrically connected to the battery cell and is used to extract and transmit the electrical energy of the battery cell to external devices. To reliably fix the output electrode and ensure electrical insulation, this solution provides an insulating base. The insulating base is detachably installed by the dovetail protrusion on it engaging with the dovetail groove opened on the edge of the end plate. Since the dovetail groove is opened on the edge of the end plate along the second direction, the insulating base can slide directly into and lock onto the end plate in a lateral direction parallel to the first direction. This mating structure effectively restricts the displacement of the insulating base in other directions after installation, ensuring the stability of the connection. Compared with fixing by screws or complex snap-fit ​​methods, this solution can complete the installation and removal of the insulating base by simple lateral sliding, improving the efficiency and convenience of assembly and maintenance operations.

[0007] In some embodiments, the end plate includes a first substrate and a second substrate disposed opposite to each other along a first direction, with the second substrate located on the side of the first substrate away from the battery cell. The dovetail protrusion is provided with elastic limiting teeth for engaging with the second substrate after the insulating base is installed in place, and for restricting its disengagement in a direction away from the first substrate. The above technical solution, by setting elastic limiting teeth to form an engaging structure with the second substrate, achieves mechanical self-locking of the insulating base based on the dovetail groove fit. This effectively limits the displacement of the insulating base along the disengagement direction under vibration conditions, improving the reliability and stability of the connection. Simultaneously, while ensuring the locking function, the elastic engagement still allows for disassembly by applying external force, taking into account the operability of maintenance operations.

[0008] In some embodiments, there are multiple elastic limiting teeth, which are spaced apart along a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other. The above technical solution forms a multi-point distributed locking mechanism on the dovetail protrusion, improving the uniformity of the clamping force distribution, effectively preventing loosening of the insulating base due to single-point failure under vibration, and enhancing the reliability of the connection.

[0009] In some embodiments, the end plate also has a receiving groove along its second direction edge, with a dovetail groove disposed within the receiving groove, which is used to accommodate the insulating base. The above-described technical solution, through the receiving groove, embeds the fixing part of the insulating base into the end plate, achieving structural flatness and space optimization. This design avoids overhang of the fixing part, enhances the overall structural compactness and mechanical strength, and provides more adequate circumferential support for the insulating base.

[0010] In some embodiments, the dovetail protrusion has multiple weight-reducing cavities, each penetrating the dovetail protrusion along a first direction. The above-described technical solution achieves weight reduction of the insulating base by designing the weight-reducing cavities, lowering its motion inertia, facilitating assembly, and reducing raw material consumption. Furthermore, this structure increases the heat dissipation surface area, potentially improving the heat dissipation performance of the output electrode plate and helping to ensure the dimensional stability of the part during injection molding.

[0011] In some embodiments, the dovetail protrusion includes a main body and two protrusions. The main body is connected to one side of the fixing part along the second direction, and the two protrusions are respectively disposed on both sides of the main body along the third direction. The protrusions are used to engage with the groove wall of the dovetail groove after the insulating base is installed in place, and to restrict the insulating base from dislodging from the dovetail groove along the second direction. The third direction is perpendicular to both the first and second directions. In the above technical solution, the main body mainly undertakes the connection with the fixing part and basic support, while the two protrusions are dedicated to the lateral engagement and locking with the dovetail groove, separating the load-bearing structure from the locking structure, optimizing the force distribution, and improving the overall stiffness and stability of the connection in three-dimensional space through symmetrical constraints in the third direction.

[0012] In some embodiments, the two protrusions are staggered in the second direction. The staggered design of the above-described technical solution constitutes an asymmetrical anti-misalignment structure, ensuring that the insulating base can only be assembled with the dovetail groove on the end plate in the only correct direction, avoiding structural interference or assembly failure caused by reverse installation.

[0013] In some embodiments, the insulating base includes an insulating seat and a cover. The insulating seat is connected to the dovetail protrusion and is used to support the output electrode plate. The cover is fitted onto the insulating seat. The insulating seat has a first connecting portion around its periphery, and a first limiting portion is formed on the first connecting portion. The cover has a second connecting portion around its periphery opposite to the first connecting portion, and a second limiting portion is formed on the second connecting portion. The first limiting portion and the second limiting portion cooperate to restrict movement of the cover relative to the insulating seat. The above technical solution, by adopting a split cover and insulating seat design and providing mutually cooperating limiting structures at their connecting portions, achieves multi-directional constraint and stable coverage of the output electrode plate. This not only facilitates the installation of the output electrode plate, but more importantly, the anti-movement mechanism formed by the mutual cooperation of its limiting portions enhances the overall rigidity and connection reliability of the fixing part, effectively preventing loosening of electrical connections or insulation failure caused by relative displacement of components.

[0014] In some embodiments, the first limiting part is one of a limiting protrusion and a limiting groove, and the second limiting part is the other. The above-described technical solution provides clear guidance and tactile feedback during the closing process, ensuring that the cover and the insulating seat can quickly and accurately reach the preset assembly position, and effectively prevents relative movement between the two in any direction in the plane through geometric constraints, thus achieving precise positioning and stable connection.

[0015] In some embodiments, multiple first limiting parts are provided and spaced apart along the circumference of the insulating base, and multiple second limiting parts are provided and correspond one-to-one with the first limiting parts. The above technical solution forms a global constraint network on the mating surface of the cover and the insulating base, providing multi-angle coordinated limiting from the center to the edge, eliminating the dead angles of freedom that may exist at a single limiting point, thereby enhancing the structural integrity of the fixing part and its ability to resist complex deformation (such as torsional deformation) in the circumferential direction, and ensuring the long-term reliability of the electrical connection.

[0016] In some embodiments, the second connecting portion is disposed around the periphery of the first connecting portion. The above-described technical solution, with its nested structure, allows the second connecting portion to wrap around the first connecting portion from the outside, forming an effective enclosure and reinforcing frame. This not only enhances the overall rigidity and bending resistance of the fixing part's joint area but also helps to form a more continuous sealing path at the mating interface, thereby improving environmental protection performance such as dustproofing and moisture-proofing.

[0017] In some embodiments, the insulating base and the dovetail protrusion are integrally formed. The above-described technical solution provides the insulating base and the dovetail protrusion as a complete continuous body, enhancing the mechanical strength and fatigue resistance of the joint, reducing the risks of loosening, abnormal noise, and potential breakage common in separate connections, thereby providing more robust and reliable insulation and support for the output electrode plate under complex operating conditions.

[0018] In some embodiments, the insulating base further includes an extension seat, which includes a first extension plate and a second extension plate. The first extension plate is connected to the insulating base, and the second extension plate is connected to the cover. The second extension plate and the first extension plate are disposed opposite to each other along a first direction. The second extension plate is lower than the first extension plate along a second direction, forming an opening between them through which the output electrode is exposed. This technical solution forms a guide opening on the side of the fixing part, allowing the fixed output electrode to reliably extend along a preset path, achieving integrated internal fixing and external connection functions. Simultaneously, the asymmetrical cooperation of the first and second extension plates naturally forms a physical shield, balancing connection guidance and basic protection.

[0019] In some embodiments, the insulating base further includes an insulating sleeve disposed on the cover, the insulating sleeve being used to provide insulation protection for an external connector, and the sleeve being arranged opposite to the dovetail protrusion along a second direction. The above technical solution, by providing an insulating sleeve on the cover and arranging it opposite to the dovetail protrusion at the bottom along a second direction, achieves functional spatial partitioning of the insulating base: one end near the dovetail protrusion is responsible for mechanical anchoring to the end plate, while the other end near the insulating sleeve is responsible for insulation protection of external electrical connections. This layout structure is clear, physically isolating mechanical fixation from electrical connections, effectively avoiding functional interference, and improving operational safety and maintenance convenience.

[0020] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

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

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

[0024] Figure 2This application provides some embodiments of battery explosion diagrams;

[0025] Figure 3 This is a partial structural diagram of a battery device according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of an insulating base according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of an end plate according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the end plate according to another embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the structure of an insulating base according to another embodiment of this application;

[0030] Figure 8 for Figure 7 A magnified structural diagram of part A in the middle;

[0031] Figure 9 This is an exploded structural diagram of an insulating base according to an embodiment of this application.

[0032] Detailed Explanation of Reference Numerals

[0033] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 5. Housing; 5a. First housing section; 5b. Second housing section; 5c. Receiving space; 6. Battery cell; 7. Output electrode plate; 8. End plate; 801. Dovetail groove; 802. First substrate; 803. Second substrate; 804. Receiving groove; 9. Insulating base; 901. Fixing part; 902. Dovetail protrusion; 903. Elastic limiting tooth; 904. Weight reduction cavity; 905. Main body; 906. Protrusion; 907. Insulating seat; 908. Cover; 909. First connecting part; 910. First limiting part; 911. Second connecting part; 912. Second limiting part; 913. Extension seat; 914. First extension plate; 915. Second extension plate; 916. Insulating sleeve; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] In this application, "multiple" means two or more (including two).

[0043] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0044] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0045] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0046] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0047] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0048] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap covering the opening. Optionally, the end cap has an injection hole for injecting electrolyte into the casing. The casing may have one or more openings. The end cap may also be provided with one or more.

[0049] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0050] In battery devices, output electrodes are electrically connected to individual battery cells to draw electrical energy from the cells and transmit it to external devices. To reliably secure the output electrodes and ensure electrical insulation, an insulating base is required. In related technologies, the insulating base is often fixed to the end plate using screws or disposable clips, leading to two major drawbacks: firstly, the assembly process is cumbersome, requiring tools for forceful disassembly during maintenance, which can easily damage components; secondly, the base and end plate are often designed as an inseparable unit, necessitating complete replacement during repairs, resulting in high costs.

[0051] Therefore, the battery device provided in the embodiments of this application allows the insulating base to be installed by sliding directly into the dovetail groove on the side of the end plate via its dovetail protrusion. This design not only enables quick assembly and disassembly using tools, but its core value lies in its ability to achieve non-destructive disassembly and independent replacement of the insulating base relative to the end plate. When maintenance is required, only the damaged insulating base needs to be slid out sideways for replacement, while the end plate and surrounding structure can be completely preserved, thereby minimizing maintenance costs and complexity.

[0052] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0053] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0054] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0055] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0056] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0057] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0058] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0059] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0060] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0061] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0062] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0063] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0064] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0065] like Figure 1As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0066] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0067] 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.

[0068] 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 that makes up a battery.

[0069] 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, with 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; 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.

[0070] To improve the sealing performance after the first housing part 5a and the second housing part 5b are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 5a and the second housing part 5b.

[0071] Assuming that the first box section 5a covers the top of the second box section 5b, the first box section 5a can also be called the upper box cover, and the second box section 5b can also be called the lower box.

[0072] In the battery device 2, there can be one or more battery cells 6. If there are multiple battery cells 6, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 6 are connected in both series and parallel.

[0073] 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.

[0074] Please refer to the reference. Figures 3 to 5 , Figure 3 This is a partial structural diagram of a battery device according to an embodiment of this application. Figure 5 This is a schematic diagram of the structure of an end plate according to an embodiment of this application.

[0075] As shown in the figure, an embodiment of this application provides a battery device 2, including a battery cell 6, an output electrode 7, an end plate 8, and an insulating base 9. The output electrode 7 is electrically connected to the battery cell 6, and the end plate 8 is disposed on one side of the battery cell 6 along a first direction X. The end plate 8 is provided with a dovetail groove 801, which is recessed along the edge of the end plate 8 in a second direction Y, and the first direction X is perpendicular to the second direction Y. The insulating base 9 is used to fix the output electrode 7. The insulating base 9 includes a fixing part 901 and a dovetail protrusion 902 disposed on the fixing part 901 facing the second direction Y. The dovetail protrusion 902 is configured to slide into or out of the dovetail groove 801. The insulating base 9 is detachably mounted to the end plate 8 through the cooperation of the dovetail protrusion 902 and the dovetail groove 801.

[0076] For example, multiple batteries are stacked along a first direction X, where the first direction X can be the thickness direction of the battery cell 6, and the second direction Y can be the height direction of the battery cell 6.

[0077] The output electrode 7 is a conductive metal component, primarily used for the transmission and collection of electrical energy. One end is connected to the electrode (positive or negative) of the battery cell 6, while the other end is used to lead the current to external devices or other battery cells 6, forming a complete circuit. It is typically made of highly conductive metals such as aluminum, copper, or nickel, and can be in the form of a sheet, strip, or a custom-shaped component tailored to a specific structure.

[0078] The end plate 8 is a structural support component in the battery module, typically located at the end of the stacked battery cells 6. Its main functions are structural fixation, providing an installation interface, and enhancing the overall rigidity of the module. In this design, the end plate 8 features a crucial dovetail groove 801. This groove is usually made of engineering plastics (such as PPA or fiber-reinforced nylon) through injection molding, or of metal (such as aluminum profiles) through extrusion molding.

[0079] The insulating base 9 is a multi-functional integrated component whose core functions are fixation and insulation. It must reliably support and fix the output electrode 7, preventing it from loosening due to vibration, and ensure reliable electrical insulation between the output electrode 7 and metal structural components such as the end plate 8 to prevent short circuits. The fixing part 901 is the main structure of the insulating base 9, responsible for directly or indirectly clamping and fixing the output electrode 7. The fixing part 901 can be designed as an insulating seat 907 with slots or claws, into which the output electrode 7 can be inserted and secured. To further improve the fixing effect and safety, the fixing part 901 can also include an openable cover 908, forming a closed or semi-closed enclosure structure together with the insulating seat 907. The dovetail protrusion 902 is the mechanical connection interface between the insulating base 9 and the end plate 8, and its unique trapezoidal or conical profile mates with the dovetail groove 801 on the end plate 8. The dovetail protrusion 902 can be integrally injection molded with the main body (i.e., the fixing part 901) of the insulating base 9. It can be designed with structures such as elastic limiting teeth 903, which can spring up after sliding into the dovetail groove 801 to prevent reverse dislodgement and enhance connection stability.

[0080] The dovetail groove 801 and the dovetail protrusion 902 are the core mechanical structure that enables detachable installation in this solution. The concave shape of the dovetail groove 801 and the convex shape of the dovetail protrusion 902 match each other, forming a sliding pair that can only be inserted and removed from one direction. Once slid into place, the dovetail-shaped beveled contact naturally restricts its displacement in the second direction Y and the third direction Z. When a battery cell 6 or output electrode 7 needs maintenance, the maintenance personnel only need to slide the insulating base 9 in the opposite direction of the first direction X to remove it entirely from the end plate 8 without disassembling the end plate 8 or the entire module. This achieves modular maintenance, greatly improving maintenance efficiency and reducing costs.

[0081] In the technical solution of this application embodiment, an end plate 8 is provided along the first direction X of the battery cell 6. The end plate 8 can provide structural protection and constraint for the battery cell 6, improving the mechanical stability and safety of the battery module during operation. The output electrode 7 is electrically connected to the battery cell 6 and is used to lead out the electrical energy of the battery cell 6 and transmit it to external devices. To reliably fix the output electrode 7 and ensure electrical insulation, this solution provides an insulating base 9. The insulating base 9 is detachably installed by the dovetail protrusion 902 on it cooperating with the dovetail groove 801 opened on the edge of the end plate 8. Since the dovetail groove 801 is opened on the edge of the end plate 8 along the second direction Y, the insulating base 9 can slide directly into and lock onto the end plate 8 in a lateral direction parallel to the first direction X. This mating structure can effectively limit the displacement of the insulating base 9 in other directions after installation, ensuring the stability of the connection. Compared with the traditional method of fixing with screws or complex buckles, this solution can complete the installation and removal of the insulating base 9 by simple lateral sliding, improving the efficiency and convenience of assembly and maintenance operations.

[0082] like Figures 6 to 8 As shown, in some embodiments, the end plate 8 includes a first substrate 802 and a second substrate 803 disposed opposite to each other along a first direction X, with the second substrate 803 located on the side of the first substrate 802 away from the battery cell 6. The dovetail protrusion 902 is provided with an elastic limiting tooth 903 for engaging with the second substrate 803 after the insulating base 9 is installed in place, and for preventing it from dislodging in a direction away from the first substrate 802.

[0083] The end plate 8 of the battery device 2 adopts a layered structure, specifically including a first substrate 802 and a second substrate 803 arranged opposite to each other along the first direction X. The first substrate 802 is close to the battery cell 6 and mainly serves as direct support; the second substrate 803 is located on the outside and cooperates with the dovetail protrusion 902 of the insulating base 9 to form a locking mechanism.

[0084] To ensure reliable locking of the insulating base 9 after installation, an elastic limiting tooth 903 is provided on the dovetail protrusion 902. This limiting tooth is typically integrally injection molded from the same engineering plastic as the insulating base 9, utilizing the material's inherent elasticity. When the insulating base 9 slides laterally along the end plate 8, the elastic limiting tooth 903 undergoes elastic deformation due to compression; once it slides to a preset position, the limiting tooth quickly rebounds and engages with the edge or a specific slot of the second substrate 803, forming a mechanical interlock. This structure effectively prevents the insulating base 9 from reversing under vibration, ensuring the stability of the connection. Furthermore, when disassembly is required, only a certain release force needs to be applied to cause the limiting tooth to elastically deform again, achieving non-destructive unlocking and balancing maintenance convenience.

[0085] The above-described technical solution, by setting the elastic limiting teeth 903 to form a snap-fit ​​structure with the second substrate 803, achieves mechanical self-locking of the insulating base 9 based on the cooperation of the dovetail groove 801. This effectively limits the displacement of the insulating base 9 along the disengagement direction under vibration conditions, improving the reliability and stability of the connection. At the same time, while ensuring the locking function, the elastic snap-fit ​​can still be disassembled by applying external force, taking into account the operability of maintenance operations.

[0086] In some embodiments of this application, there are multiple elastic limiting teeth 903, which are spaced apart along a third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0087] By setting multiple spaced limiting teeth in the third direction Z, it is equivalent to establishing multiple independent locking points in the locking direction. This design evenly distributes the locking force over a wider contact area, avoiding stress concentration that may occur with single-point locking. Even if the locking force of a certain limiting tooth decreases slightly due to manufacturing tolerances or unforeseen circumstances, the remaining limiting teeth can still provide sufficient holding force, enhancing the reliability and vibration resistance of the connection and preventing the insulating base 9 from accidentally loosening under harsh working conditions.

[0088] The above-mentioned technical solution forms a multi-point distributed locking on the dovetail protrusion 902, which improves the uniformity of the distribution of the card connection force, effectively prevents the insulating base 9 from loosening due to single-point failure under vibration environment, and enhances the reliability of the connection.

[0089] In some embodiments of this application, the end plate 8 is further provided with a receiving groove 804 along its second direction Y edge, and a dovetail groove is provided in the receiving groove 804. The receiving groove 804 is used to receive the insulating base 9.

[0090] The end plate 8 of the battery device 2 also has a receiving groove 804 on its edge in the second direction Y. This receiving groove 804 is a recessed space that is larger and deeper than the dovetail groove 801, in order to accommodate the fixing part 901 of the insulating base 9.

[0091] After the insulating base 9 is installed, its fixing part 901 is embedded in the receiving groove 804, so that the outer surface of the insulating base 9 can be flush or nearly flush with the outer edge of the end plate 8, achieving a flat and compact structure and avoiding the overhang of the components.

[0092] The above-described technical solution embeds the fixing part 901 of the insulating base 9 into the end plate 8 through the receiving groove 804, achieving structural flatness and space optimization. This design avoids the overhang of the fixing part 901, enhances the compactness and mechanical strength of the overall structure, and provides more adequate circumferential support for the insulating base 9.

[0093] In some embodiments, the dovetail protrusion 902 is provided with a plurality of weight-reducing cavities 904, each weight-reducing cavity 904 penetrating the dovetail protrusion 902 along a first direction X. Exemplarily, the weight-reducing cavities 904 can be designed as rectangular, circular or elliptical through holes, and are arranged uniformly or symmetrically inside the dovetail protrusion 902 to achieve an optimal balance of weight, strength and processability.

[0094] The aforementioned technical solution achieves weight reduction of the insulating base 9 through the design of the weight-reducing cavity 904, thereby reducing its motion inertia, facilitating assembly, and reducing raw material consumption. Furthermore, this structure increases the heat dissipation surface area, potentially improving the heat dissipation performance of the output electrode 7, and helping to ensure the dimensional stability of the part during injection molding.

[0095] In some embodiments, the dovetail protrusion 902 includes a main body 905 and two protrusions 906. The main body 905 is connected to one side of the fixing part 901 along the second direction Y, and the two protrusions 906 are respectively disposed on both sides of the main body 905 along the third direction Z. The protrusions 906 are used to engage with the groove wall of the dovetail groove 801 after the insulating base 9 is installed in place, and to restrict the insulating base 9 from dislodging from the dovetail groove 801 along the second direction Y. The third direction Z is perpendicular to both the first direction X and the second direction Y.

[0096] The dovetail protrusion 902 serves as the core load-bearing and connecting unit of the structure. One end of it is directly connected to the fixing part 901 of the insulating base 9 along the second direction Y, acting as an extension arm of the fixing part 901. Two protrusions 906 are respectively provided on both sides of the main body 905 along the third direction Z. They protrude outward from both sides of the main body 905, forming a typical dovetail-shaped profile.

[0097] The main body 905 primarily serves to connect with the fixing part 901 and transfer the load from the fixing part 901 to the entire dovetail protrusion 902. The two protrusions 906 engage and lock laterally with the dovetail groove 801 on the end plate 8. They contact the inclined surfaces of the dovetail groove 801 from both sides in the third direction Z, firmly clamping the insulating base 9 within the groove. By providing symmetrical constraints from both sides in the third direction Z, this double-protrusion design effectively limits the displacement of the insulating base 9 in the third direction Z and its torsion about other axes, improving the overall stiffness and stability of the connection in three-dimensional space, and providing superior vibration and impact resistance.

[0098] In the above-mentioned technical solution, the main body 905 mainly undertakes the connection with the fixed part 901 and the basic support, while the two side protrusions 906 are dedicated to the lateral engagement and locking with the dovetail groove 801, separating the load-bearing structure from the locking structure, optimizing the force distribution, and improving the overall stiffness and stability of the connection in three-dimensional space through the symmetrical constraint in the third direction Z.

[0099] In some embodiments, the two protrusions 906 are staggered in the second direction Y.

[0100] The staggered layout creates an asymmetrical physical structure, which dictates that the insulating base 9 can only be assembled with the dovetail groove 801 on the end plate 8 in one correct orientation. If the orientation is incorrect, the protrusion 906 will interfere with the groove wall of the dovetail groove 801 and cannot slide in, avoiding assembly failure or component damage caused by reverse installation. The staggered arrangement creates a distance between the locking points of the two protrusions 906 in the second direction Y. This layout increases the lever arm, and when the connection is subjected to a torsional moment about the third direction Z, the two staggered protrusions 906 can provide more effective resistance, thereby improving the torsional stability of the entire connection structure.

[0101] The above-mentioned technical solution, with its staggered design, forms an asymmetrical error-proof structure, ensuring that the insulating base 9 can only be assembled with the dovetail groove 801 on the end plate 8 in the only correct direction, thus avoiding structural interference or assembly failure caused by reverse installation.

[0102] like Figure 9 As shown, in some embodiments, the insulating base 9 includes an insulating seat 907 and a cover 908. The insulating seat 907 is connected to the dovetail protrusion 902 and is used to support the output electrode plate 7. The cover 908 covers the insulating seat 907. The insulating seat 907 has a first connecting portion 909 at its periphery, and a first limiting portion 910 is formed on the first connecting portion 909. The cover 908 has a second connecting portion 911 at its periphery, opposite to the first connecting portion 909, and a second limiting portion 912 is formed on the second connecting portion 911. The first limiting portion 910 and the second limiting portion 912 cooperate to restrict the movement of the cover 908 relative to the insulating seat 907.

[0103] The insulating base 907 serves as the base of the fixing part 901. One end is connected to the dovetail protrusion 902, and the other end is designed to support and insulate the output electrode 7. A first connecting part 909 is provided around its periphery. The cover 908, as an openable component, covers the insulating base 907, forming a complete enclosing or clamping space together with the insulating base 907, firmly fixing the output electrode 7 within it. A second connecting part 911, corresponding to the first connecting part 909, is provided around its periphery.

[0104] Furthermore, the above design creates a detachable connection between the cover 908 and the insulating base 907, improving the ease of assembly and maintenance of the output electrode plate 7.

[0105] The aforementioned technical solution, through the adoption of a split design of the cover 908 and the insulating base 907, and the setting of mutually cooperating limiting structures at their connection points, achieves multi-directional constraint and stable coverage of the output electrode plate 7. This not only facilitates the installation and operation of the output electrode plate 7, but more importantly, the anti-movement mechanism formed by the mutual cooperation of its limiting parts enhances the overall rigidity and connection reliability of the fixing part 901, effectively preventing loosening of electrical connections or insulation failure caused by relative displacement of components.

[0106] In some embodiments, the first limiting portion 910 is one of a limiting protrusion and a limiting groove, and the second limiting portion 912 is the other.

[0107] The above-mentioned technical solution provides clear guidance and tactile feedback during the closing process, ensuring that the cover 908 and the insulating seat 907 can quickly and accurately reach the preset assembly position, and effectively prevents the two from moving relative to each other in any direction in the plane through geometric constraints, thus achieving precise positioning and stable connection.

[0108] In some embodiments, a plurality of first limiting portions 910 are provided and distributed at intervals along the circumference of the insulating base 907, and a plurality of second limiting portions 912 are provided and correspond one-to-one with the first limiting portions 910.

[0109] In the fixing part 901 of the insulating base 9 of the battery device 2, the limiting structure adopts an optimized design of circumferential distribution: multiple first limiting parts 910 are provided and are distributed at intervals along the circumference of the insulating base 907. Correspondingly, multiple second limiting parts 912 are also provided and correspond to the first limiting parts 910 one by one.

[0110] The above-mentioned technical solution forms a global constraint network on the mating surface of the cover 908 and the insulating seat 907. It provides multi-angle coordinated restraint from the center to the edge, eliminating the dead angles of freedom that may exist at a single restraint point. This enhances the structural integrity of the fixing part 901 and its ability to resist complex deformation (such as torsional deformation) in the circumferential direction, ensuring the long-term reliability of the electrical connection.

[0111] In some embodiments, the second connecting portion 911 is disposed around the periphery of the first connecting portion 909.

[0112] For example, the first connecting portion 909 may be a slightly lower platform with first limiting portions 910 (such as protrusions) distributed on it; while the second connecting portion 911 is designed as a ring wall extending downward from the edge of the cover 908, with second limiting portions 912 (such as grooves) corresponding to the first limiting portions 910 distributed on its inner side. When the cover is closed, the ring wall fits precisely around the platform.

[0113] The second connecting part 911 encloses the first connecting part 909 from the outside, essentially adding a continuous reinforcing rib or frame to the outside of the joint area between the cover 908 and the insulating base 907. This enhances the overall rigidity and bending resistance of the joint area of ​​the fixing part 901, making the entire structure more able to withstand stress from the outside or inside. The surrounding structure places the joint between the cover 908 and the insulating base 907 inside, while the outer second connecting part 911 forms a physical barrier. This helps improve the overall dustproof and moisture-proof capabilities of the fixing part 901. At the same time, the outer connecting part also provides a certain degree of physical protection for the internal core limiting structure, preventing it from being subjected to accidental impacts or interference.

[0114] The above-mentioned technical solution, the nested structure, allows the second connecting part 911 to wrap around the first connecting part 909 from the outside, forming an effective enclosure and reinforcement frame. This not only enhances the overall rigidity and bending resistance of the fixing part 901 joint area, but also helps to form a more continuous sealing path at the mating interface, thereby improving environmental protection performance such as dustproof and moistureproof.

[0115] In some embodiments, the insulating base 907 and the dovetail protrusion 902 are integrally formed. The above-described technical solution provides the insulating base 907 and the dovetail protrusion 902 as a complete continuous body, improving the mechanical strength and fatigue resistance of the joint, reducing the risks of loosening, abnormal noise, and potential breakage common in split connections, thereby providing more stable and reliable insulation and support for the output electrode plate 7 under complex operating conditions.

[0116] like Figure 3 as well as Figure 9 As shown, in some embodiments, the fixing part 901 further includes an extension seat 913, which includes a first extension plate 914 and a second extension plate 915. The first extension plate 914 is connected to the insulating base 907, and the second extension plate 915 is connected to the cover 908. The second extension plate 915 and the first extension plate 914 are disposed opposite to each other along a first direction X. The height of the second extension plate 915 along the second direction Y is lower than that of the first extension plate 914, so that an opening is formed between them, through which the output electrode 7 is exposed.

[0117] The first extension plate 914 is connected to the insulating base 907 and can be considered as an extension of the main body of the insulating base 907. The second extension plate 915 is connected to the cover 908 and can be considered as an extension of the cover 908. When the cover 908 is closed on the insulating base 907, the second extension plate 915 and the first extension plate 914 are arranged opposite to each other along the first direction X (the stacking direction of the battery cells 6), together forming the extension base 913. The height of the second extension plate 915 along the second direction Y is intentionally designed to be lower than that of the first extension plate 914. This height difference naturally forms an opening between the first extension plate 914 and the second extension plate 915.

[0118] This opening provides a pre-defined, controlled lead-out path for the output electrode 7, which is fixed within the insulating base 907. The output electrode 7 can reliably extend from this opening for connection to external cables or other conductive components, integrating internal fixing with external connection functionality. The opening's structure clearly defines the connection position and direction of the external cable or electrode, serving a guiding function. Simultaneously, the relatively high height of the first extension plate 914 provides ample operating space for the connection points, facilitating the use of wiring tools and the inspection of the connection status.

[0119] The aforementioned technical solution forms a guide opening on the side of the fixing part 901, allowing the fixed output electrode 7 to reliably extend along a preset path, thus integrating the functions of internal fixing and external connection. Simultaneously, the asymmetrical cooperation of the first and second extension plates 915 naturally creates a physical shield, balancing connection guidance and basic protection.

[0120] In some embodiments, the insulating base 9 further includes an insulating sleeve 916 disposed on the cover 908. The insulating sleeve 916 is used to provide insulation protection for an external connector, and is arranged opposite to the dovetail protrusion 902 along the second direction Y.

[0121] The core function of the insulating sleeve 916 is to provide insulation protection for an external connector, exemplarily a sampling harness connector from the battery management system (BMS) or a bus terminal connected to other modules. When the external connector is inserted into this sleeve, the sleeve wall ensures reliable electrical isolation between it and surrounding metal components (such as the end plate 8 and the battery cell housing), preventing short circuits. Spatially, the insulating sleeve 916 is arranged opposite the dovetail protrusion 902 of the insulating base 9 along the second direction Y. The insulating sleeve 916 and the dovetail protrusion 902 are located at opposite ends of the insulating base 9 in the second direction Y.

[0122] The above-described technical solution, by setting an insulating sleeve 916 on the cover 908 and arranging it opposite to the dovetail protrusion 902 at the bottom along the second direction Y, achieves functional spatial partitioning of the insulating base 9: one end near the dovetail protrusion 902 is responsible for mechanical anchoring with the end plate 8, while the other end near the insulating sleeve 916 is responsible for insulating and protecting external electrical connections. This layout structure is clear, physically isolating mechanical fixation from electrical connections, effectively avoiding functional interference, and improving operational safety and maintenance convenience.

[0123] In some alternative embodiments, the battery device 2 includes a battery cell 6, an output electrode 7, an end plate 8, and an insulating base 9. The output electrode 7 is electrically connected to the battery cell 6, and the end plate 8 is disposed on one side of the battery cell 6 along a first direction X. The end plate 8 is provided with a dovetail groove 801, which is recessed along the edge of the end plate 8 in a second direction Y, with the first direction X perpendicular to the second direction Y. The insulating base 9 is used to fix the output electrode 7. The insulating base 9 includes a fixing part 901 and a dovetail protrusion 902 disposed on the fixing part 901 facing the second direction Y. The dovetail protrusion 902 is configured to slide into or out of the dovetail groove 801. The insulating base 9 is detachably mounted to the end plate 8 through the cooperation of the dovetail protrusion 902 and the dovetail groove 801. The end plate 8 includes a first substrate 802 and a second substrate 803 disposed opposite each other along the first direction X, with the second substrate 803 located on the side of the first substrate 802 away from the battery cell 6. The dovetail protrusion 902 is provided with elastic limiting teeth 903, which are used to engage with the second substrate 803 after the insulating base 9 is installed in place, and to prevent it from dislodging in a direction away from the first substrate 802. Multiple elastic limiting teeth 903 are provided, spaced apart along the third direction Z. The end plate 8 also has a receiving groove 804 along its second direction Y, with a dovetail groove 801 located within it. The receiving groove 804 is used to accommodate the fixing part 901 of the insulating base 9. Multiple weight-reducing cavities 904 are provided within the dovetail protrusion 902, each penetrating the dovetail protrusion 902 along the first direction X. The fixing part 901 includes an insulating base 907 and a cover 908. The insulating base 907 is connected to the dovetail protrusion 902 and is used to support and insulate the output electrode 7. The cover 908 covers the insulating base 907. The insulating base 907 has a first connecting portion 909 on its periphery, and a first limiting portion 910 is formed on the first connecting portion 909. The cover 908 has a second connecting portion 911 on its periphery, which is opposite to the first connecting portion 909, and a second limiting portion 912 is formed on the second connecting portion 911. The first limiting portion 910 and the second limiting portion 912 cooperate with each other to restrict the movement of the cover 908 relative to the insulating base 907.

[0124] Secondly, this application provides an electrical device including the battery device 2 described in the above embodiments, which provides electrical energy. In the battery device 2, an end plate 8 is provided along the first direction X of the battery cell 6. This end plate 8 provides structural protection and constraint for the battery cell 6, improving the mechanical stability and safety of the battery module during operation. An output electrode 7 is electrically connected to the battery cell 6, used to draw out and transmit the electrical energy of the battery cell 6 to an external device. To reliably fix the output electrode 7 and ensure electrical insulation, this solution provides an insulating base 9. The insulating base 9 is detachably installed by the dovetail protrusion 902 on it engaging with the dovetail groove 801 opened on the edge of the end plate 8. Since the dovetail groove 801 is opened on the edge of the end plate 8 along the second direction Y, the insulating base 9 can slide directly into and lock onto the end plate 8 in a lateral direction parallel to the second direction Y. This engaging structure effectively restricts the displacement of the insulating base 9 in other directions after installation, ensuring the stability of the connection. Compared to fixing with screws or using complex clips, this solution allows for the installation and removal of the insulating base 9 through simple lateral sliding, improving the efficiency and ease of operation of assembly and maintenance.

[0125] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery cell comprises: a battery cell; an output pole tab electrically connected to the battery cell; an end plate provided on one side of the battery cell along a first direction, the end plate being provided with a dovetail groove formed on the edge of the end plate along a second direction, the first direction being perpendicular to the second direction; an insulating base for fixing the output pole tab, the insulating base comprising a fixed part and a dovetail protrusion provided on the side of the fixed part facing the second direction, the dovetail protrusion being configured to be capable of sliding into or out of the dovetail groove, and the insulating base being detachably mounted on the end plate through the cooperation of the dovetail protrusion and the dovetail groove.

2. The battery device according to claim 1, characterized by The end plate comprises a first base plate and a second base plate oppositely arranged along the first direction, and the second base plate is located on the side of the first base plate away from the battery cell; The dovetail protrusion is provided with elastic limiting teeth for clamping the second base plate after the insulating base is mounted in place and limiting it from being pulled out in the direction away from the first base plate.

3. The battery device of claim 2, wherein The number of the elastic limiting teeth is multiple, and the multiple elastic limiting teeth are arranged at intervals along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

4. The battery device of claim 1, wherein The edge of the end plate along the second direction is also provided with a receiving groove, and the dovetail groove is arranged in the receiving groove, and the receiving groove is used to accommodate the insulating base.

5. The battery device of claim 1, wherein The dovetail protrusion is provided with multiple weight-reducing cavities, and each weight-reducing cavity penetrates through the dovetail protrusion along the first direction.

6. The battery device of claim 1, wherein The dovetail protrusion comprises: a main body part connected to the side of the fixed part along the second direction; two protrusions respectively arranged on the two sides of the main body part along a third direction, the protrusions being used to clamp the groove wall of the dovetail groove after the insulating base is mounted in place and limit the insulating base from being pulled out of the dovetail groove along the second direction, and the third direction being perpendicular to the first direction and the second direction in pairs.

7. The battery device of claim 6, wherein The two protrusions are staggered in the second direction.

8. The battery device according to any one of claims 1 to 7, characterized by, The insulating base comprises: an insulating seat connected to the dovetail protrusion for bearing the output pole tab; a cover body covering the insulating seat; wherein the periphery of the insulating seat is provided with a first connecting part, the first connecting part being formed with a first limiting part, the periphery of the cover body being provided with a second connecting part opposite to the first connecting part, the second connecting part being formed with a second limiting part, and the first limiting part and the second limiting part being matched with each other to limit the movement of the cover body relative to the insulating seat.

9. The battery device of claim 8, wherein, The first limiting part is one of a limiting protrusion and a limiting groove, and the second limiting part is the other one.

10. The battery device of claim 8, wherein, The first limiting part is provided with multiple limiting parts and is distributed at intervals in the circumferential direction of the insulating seat, and the second limiting part is provided with multiple limiting parts and corresponds to the first limiting part one by one.

11. The battery device of claim 8, wherein, The second connecting part is arranged around the periphery of the first connecting part.

12. The battery device of claim 8, wherein, The insulating seat and the dovetail protrusion are integrally formed.

13. The battery device of claim 8, wherein, The insulating base further comprises an extension seat, and the extension seat comprises: a first extension plate connected to the insulating seat; a second extension plate connected to the cover body, the second extension plate being oppositely arranged with the first extension plate along the first direction; The second extending plate has a height in the second direction lower than that of the first extending plate, so that an opening is formed between the two, and the output tab is exposed from the opening.

14. The battery device of any one of claims 9-13, wherein, The insulating base further comprises an insulating sleeve arranged on the cover body, the insulating sleeve being used for insulating protection of an external connecting member and being arranged opposite to the dovetail convex portion in the second direction.

15. An electrical device, characterized by The electric device comprises the battery device according to any one of claims 1-14, and the battery device is used for providing electric energy.

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