Battery device, electric equipment and energy storage equipment

Abstract

The invention provides a battery device, electric equipment and energy storage equipment. The battery device comprises a battery pack, a box body, an output pole assembly and a protective cover. The box body is provided with a containing cavity used for containing the battery pack, the output electrode assembly comprises an output electrode electric connecting piece and an insulating shell arranged on the outer side of the output electrode electric connecting piece in a sleeving mode, the first end of the output electrode electric connecting piece is electrically connected with the battery pack, and the second end of the output electrode electric connecting piece forms an external electricity output interface of the battery device. The opening is configured to expose the counter-electrical output interface. The protective cover is configured to be slidably disposed relative to the insulating shell to switch between a first position opening the opening and a second position closing the opening. The space utilization rate of the battery device is improved, so that the energy density of the whole battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices, electrical equipment, and energy storage devices. Background Technology

[0002] With the rapid development of new energy sources, battery devices, as the core power source for electric vehicles, energy storage equipment, and other devices, are of paramount importance in terms of performance.

[0003] The energy density of a battery is one of the key indicators of battery performance, directly affecting the driving range of electric vehicles. Therefore, improving the energy density of battery devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device, an electrical device, and an energy storage device to improve the energy density of the battery device.

[0005] A first aspect of this application provides a battery device including a battery pack, a housing, an output electrode assembly, and a protective cover. The battery pack includes at least two individual battery cells, and the housing has a receiving cavity for accommodating the battery pack. The output electrode assembly includes an output electrode electrical connection piece and an insulating shell sleeved on the outside of the output electrode electrical connection piece. A first end of the output electrode electrical connection piece is electrically connected to the battery pack, and a second end of the output electrode electrical connection piece forms an external power output interface for the battery device. The insulating shell has an opening configured to expose the external power output interface. The protective cover is configured to be slidably disposed relative to the insulating shell to switch between a first position with the opening open and a second position with the opening closed.

[0006] In the technical solution of this application embodiment, the protective cover is slidably disposed relative to the insulating shell to slide open or slide close. In this way, the space through which the protective cover slides is a flat two-dimensional sheet-like space. The thickness of this space is basically equal to the thickness of the protective cover itself, and it does not occupy additional external space. Therefore, the space utilization rate is improved and the energy density of the battery device is increased.

[0007] In some embodiments, the housing includes sidewalls that circumferentially enclose a receiving cavity. An output port is provided on the sidewall, and the opening of the insulating shell corresponds to the position of the output port. The protective cover is configured to slide in a plane parallel to the surface of the sidewall. In this embodiment, the second end of the output electrode electrical connector extends to the output port on the sidewall, thus exposing the second end of the output electrode electrical connector through the output port. External electrical connectors are directly connected to the external power output interface through the output port, thereby realizing the external output of electrical energy. In this embodiment, the external power output interface is directly formed by the end of the output electrode electrical connector without a connector, thus reducing the volume occupied by non-energy storage components and increasing the energy density of the battery device. Furthermore, since the protective cover slides in a plane parallel to the surface of the sidewall, its projection is always within the area covered by the sidewall of the housing, regardless of whether it is open or closed. The extra space occupied by the protective cover is only its own thickness, thus reducing the volume occupied and further improving the space utilization of the battery device, thereby increasing the overall energy density of the battery device.

[0008] In some embodiments, the protective cover includes a sheet-like structure. The technical solution of this application embodiment further reduces the thickness of the protective cover itself and the space it occupies by setting the protective cover to a sheet-like structure.

[0009] In some embodiments, the protective cover is configured to slide relative to the insulating shell in a longitudinal direction. The insulating shell includes a guide rail located on at least one side of the opening and extending in a longitudinal direction, and a limiting top plate disposed above the guide rail. The gap between the limiting top plate and the guide rail forms a guide channel. The protective cover includes a cover body and a slider disposed on at least one side of the cover body. The slider is movably disposed within the guide channel. In this embodiment, the insulating shell is provided with a guide rail and a limiting top plate disposed on the upper side of the guide rail. The limiting top plate limits the slider, preventing the protective cover from detaching from the insulating shell.

[0010] In some embodiments, the protective cover further includes a first limiting block disposed on the cover body, and a limiting groove is provided on the limiting top plate. In a second position, the first limiting block is engaged in the limiting groove. The technical solution of this application embodiment limits the protective cover by setting the limiting groove and the first limiting block to engage and cooperate. In this way, when the protective cover is slid to the second position to close the opening, the protective cover can remain in the closed position, thereby ensuring the isolation of the output electrode's external output interface from the outside world and improving safety and reliability.

[0011] In some embodiments, the cover has a strip-shaped hole extending from its longitudinal edge. This strip-shaped hole is configured to make the cover elastic in the lateral direction, with the lateral direction perpendicular to the longitudinal direction. The technical solution of this application embodiment, by providing a strip-shaped hole in the cover to make it elastic in the lateral direction, allows for limiting the position simply by pressing or releasing the cover from its left or right sides. In other words, the limiting of the protective cover is achieved by utilizing the deformation of the cover itself. This results in a simple structure and easy operation, improving the convenience of opening and closing the protective cover.

[0012] In some embodiments, the protective cover further includes a second limiting block disposed on the cover body. The second limiting block is located laterally inside the slider, and a limiting strip is disposed on the insulating shell. In the first position, the second limiting block is locked by the limiting strip. In this embodiment, when the protective cover is in the first position, the second limiting block is locked by the limiting strip, thus ensuring that the protective cover is not separated from the output electrode assembly. Therefore, the protective cover is less likely to be lost during handling, storage, or use, reducing the risk of damage caused by exposure of the external output interface due to the loss of the protective cover, thereby improving the safety and reliability of the battery.

[0013] In some embodiments, the insulating shell further includes a plurality of positioning blocks spaced apart in the circumferential direction, the positioning blocks abutting against the inner surface of the output port on the side wall of the housing. By providing a plurality of positioning blocks that abut against the inner surface of the output port, the insulating shell of this embodiment achieves accurate positioning of the position of the insulating shell relative to the position of the output port during assembly through the abutment of the positioning blocks against the inner surface.

[0014] In some embodiments, the output electrode assembly further includes a blocking wall that protrudes from the insulating shell and is positioned beside the opening to increase the creepage distance. The blocking wall on the insulating shell of the output electrode assembly in this application embodiment extends the creepage path of current on the surface of the insulating shell, effectively increasing the creepage distance and thus reducing the risk of arcing, thereby improving the safety of the battery device.

[0015] In some embodiments, a sealing ring is provided between the insulating shell and the inner surface of the housing. This embodiment effectively prevents water, dust, and other contaminants from entering the housing from the output port by providing the sealing ring, thus effectively improving the operational reliability of the battery device. Furthermore, preventing the intrusion of these contaminants ensures the dryness and cleanliness of the housing interior, guarantees the insulation protection of the high-voltage circuit, avoids safety hazards such as short circuits and arcing caused by condensation or other impurities, and ensures electrical safety.

[0016] In some embodiments, the output electrode connector is a bent structure comprising a first segment, a second segment, and a bent segment disposed between the first and second segments along its extension direction. The bent segment comprises multiple layers of metal foil. When the second segment of the output electrode connector undergoes relative displacement, stress causes the multiple layers of metal foil to undergo flexible, integral deformation. This dissipates the stress in the bent segment, preventing the stress from being transmitted to the connection point with the battery cell, thereby improving the connection reliability between the output electrode connector and the battery cell.

[0017] A second aspect of this application provides an electrical device including the aforementioned battery device, which provides electrical energy.

[0018] A third aspect of this application provides an energy storage device, including the aforementioned battery device, which stores electrical energy.

[0019] 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

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application.

[0022] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application.

[0023] Figure 3 yes Figure 2 A magnified structural diagram of part P in the middle.

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the output electrode assembly of a battery device according to some embodiments of this application.

[0025] Figure 5 This is a schematic diagram of the structure of the output electrode electrical connection piece of the output electrode assembly in some embodiments of this application.

[0026] Figure 6 This is a cross-sectional structural schematic diagram of the output electrode electrical connection piece in some embodiments of this application.

[0027] Figure 7This is a partial structural schematic diagram of the output electrode assembly of a battery device according to some embodiments of this application.

[0028] Figure 8 This is a schematic diagram of the structure of the protective cover of the battery device in the first position according to some embodiments of this application.

[0029] Figure 9 This is a schematic diagram of the structure of the protective cover of the battery device in the second position according to some embodiments of this application.

[0030] Figure 10 This is a schematic diagram of the structure of the protective cover of the battery device according to some embodiments of this application.

[0031] Figure 11 yes Figure 10 The diagram shows a cross-sectional view of the protective cover along the BB direction.

[0032] The accompanying drawings are not drawn to scale.

[0033] Marker description.

[0034] 2000, vehicles.

[0035] 1000. Battery device.

[0036] 200. Enclosure; 210. Side wall; 211. Output port; 212. Through hole; 220. Base plate.

[0037] 100. Battery cell; 110. Terminal post.

[0038] 300. Output pole components.

[0039] 310. Output electrode connecting piece; 311. First section; 312. Second section; 3121. Connecting hole; 313. Bending section; 3131. Metal foil.

[0040] 320, Insulating shell; 320a, Opening; 321, Guide rail; 322, Limiting top plate; 322a, Limiting groove; 3221, First top plate section; 3222, Second top plate section; 323, Positioning block; 324, Limiting strip.

[0041] 330. Blocking wall.

[0042] 340. First contact resistance detection hole; 360. Second contact resistance detection hole.

[0043] 350. Sealing ring.

[0044] 370. Connectors.

[0045] 400. Protective cover; 410. Cover body; 411. Strip hole; 420. Slider; 421. First slider; 422. Second slider; 430. First limiting block; 440. Second limiting block; 450. Protruding handle. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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).

[0051] 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.

[0052] 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.

[0053] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0054] The battery device includes a housing and at least two battery cells disposed within the housing. The at least two battery cells are energy storage components, while the housing and other connecting structures disposed on the housing are non-energy storage components. This application proposes that reducing the space occupied by non-energy storage components can improve space utilization and thus increase the energy density of the entire battery device.

[0055] To address the above issues, this application, during its research, discovered that the protective cover on the outside of the external power output port of the battery device in related technologies occupies excessive volume, reducing the space utilization of the battery device. Based on this, this application proposes a battery device in which the protective cover slides relative to the insulating shell in a plane parallel to the sidewall surface to open or close the opening. Thus, regardless of whether the protective cover is open or closed, the space occupied by it is only its own thickness, thereby reducing the occupied volume, improving the space utilization of the battery device, and ultimately increasing the energy density of the entire battery device.

[0056] refer to Figures 1 to 11 The structure of a battery device according to some embodiments of this application and the structure of an electrical device that uses the battery device to provide electrical energy will be described in detail.

[0057] This application provides an electrical device including the aforementioned battery device, which provides electrical energy. The electrical device can be any type of device that uses a battery device as its power source, including but not limited to mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, ships, and spacecraft. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0058] For ease of explanation, the following embodiments use a vehicle 2000 as an example of an electrical device from some embodiments of this application.

[0059] Figure 1 A vehicle 2000 is shown using a battery device 1000 as its power source. (Reference) Figure 2 The battery device 1000 is disposed within the vehicle 2000 and includes at least one battery cell 100. A drive motor is disposed within the vehicle 2000, and the drive motor is electrically connected to the battery device 1000. The battery device 1000 provides electrical energy to the drive motor, which is connected to the wheels via a transmission mechanism to drive the vehicle. Specifically, the battery device 1000 may be horizontally disposed at the bottom of the vehicle 2000. The driving force of the drive motor may be entirely electrical energy, or partially electrical energy and partially other energy sources. For example, the vehicle 2000 may also include a power source such as an engine. Any device that uses the battery device 1000 as a power source is within the scope of protection of this application.

[0060] The battery device 1000 of this application embodiment includes a battery pack, and the battery pack includes at least two battery cells 100. Specifically, in this embodiment, as shown... Figure 2 As shown, the battery device 1000 of this embodiment includes a plurality of battery cells 100 and a housing 200 for accommodating the plurality of battery cells 100. The housing 200 has a receiving cavity, in which the plurality of battery cells 100 are arranged. Specifically, the housing 200 of this embodiment is a frame-shaped housing. Of course, in other embodiments, the housing 200 may also be a disc-shaped housing or other shapes.

[0061] The battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc. This application does not limit this. Multiple battery cells are electrically connected via connecting tabs. The multiple battery cells connected by the connecting tabs can be connected in series, in parallel, or in a mixed configuration.

[0062] The battery cell 100 is the smallest unit constituting the battery device 1000. The battery cell 100 includes a casing, end caps, electrode assemblies, terminals 110, and other functional components. The inner cavity of the casing houses the electrode assemblies. The electrode assemblies are the components in the battery cell where electrochemical reactions occur. The casing may contain one or more electrode assemblies. The electrode assemblies are mainly formed by winding or stacking positive and negative electrode sheets. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the terminals to form a current loop. The electrode assemblies can be of a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0063] The end cap closes to the opening of the housing to isolate the internal environment of the battery cell 100 from the external environment. The shape of the end cap can be adapted to the shape of the housing to fit it. Optionally, the end cap can be made of a material with a certain degree of hardness and strength (such as aluminum alloy), so that the end cap is less prone to deformation under pressure and impact, giving the battery cell higher structural strength and improving safety performance. A terminal post 110 is provided on the end cap, which is used for electrical connection with the electrode assembly for outputting or inputting electrical energy into the battery cell.

[0064] In some embodiments of this application, reference is made to Figures 2 to 10 This application provides a battery device including a battery pack, a housing 200, an output electrode assembly 300, and a protective cover 400. The battery pack includes at least two battery cells 100. The housing 200 has a receiving cavity for accommodating the battery pack. The output electrode assembly 300 includes an output electrode electrical connection piece 310 and an insulating shell 320 sleeved on the outside of the output electrode electrical connection piece 310. A first end of the output electrode electrical connection piece 310 is electrically connected to the battery pack, and a second end of the output electrode electrical connection piece 310 forms an external power output interface for the battery device. The insulating shell 320 has an opening 320a, which is configured to expose the external power output interface. The protective cover 400 is configured to be slidably disposed relative to the insulating shell 320 to switch between a first position with the opening 320a open and a second position with the opening 320a closed.

[0065] refer to Figure 2 The battery pack includes at least two battery cells 100, which are arranged in an array within the housing 200. In some embodiments, the at least two battery cells 100 are arranged sequentially in a first direction X to form a battery row, and the at least two battery packs are arranged sequentially in a second direction Y to form an array, wherein the second direction Y is perpendicular to the first direction X. For example, the battery cell 100 is a prismatic battery, the first direction X may be parallel to its length direction, and the second direction Y may be parallel to its thickness direction.

[0066] Continue to refer to Figure 2The housing 200 includes sidewalls 210 that enclose the circumferential direction to form a receiving cavity. For example, the housing 200 may be a square housing and include four sidewalls 210 arranged sequentially in the circumferential direction. Of course, the housing 200 may also be of other shapes, and the shape of the sidewalls 210 may change accordingly. The housing 200 also includes a bottom plate 220 disposed on the bottom surface of the receiving cavity. The sidewalls 210 and the bottom plate 220 together enclose the receiving cavity.

[0067] Specifically Figure 2 In this embodiment, the output port 211 is square. In other embodiments, the output port 211 may also be other shapes, and this application does not limit this.

[0068] refer to Figure 3 and Figure 4 The output electrode assembly 300 in this embodiment includes an output electrode electrical connector 310. The first end of the output electrode electrical connector 310 is electrically connected to the battery cell 100, and the second end of the output electrode electrical connector 310 extends to the output port 211 of the side wall 210 to form an external power output interface.

[0069] Specifically, adjacent battery cells 100 are electrically connected via an intermediate connecting piece, which can be in series, parallel, or a combination of both. The first end of the output electrode connecting piece 310 can be connected (e.g., welded) to the terminal post 110 of the battery cell 100 located at the end to output the electrical energy of the multiple battery cells 100 to the outside. Specifically, the second end of the output electrode connecting piece 310 directly forms an external power output interface, thereby completing the external output of electrical energy from at least two battery cells 100.

[0070] In this embodiment, the second end of the output electrode connecting piece 310 extends to the output port 211 of the side wall 210, thus exposing the second end of the output electrode connecting piece 310 through the output port 211. External electrical connectors are directly connected to the external power output interface through the output port 211, thereby realizing the external output of electrical energy. In this embodiment, the external power output interface is directly formed by the end of the output electrode connecting piece, without the need for a connector.

[0071] In some embodiments, the output electrode connection piece 310 may be an output electrode bar, for example, an aluminum bar.

[0072] In some embodiments, the battery device 1000 includes two output electrode components 300, namely a positive output electrode component and a negative output electrode component.

[0073] refer to Figure 8 and Figure 9 The battery device in this application embodiment also includes a protective cover 400. Figure 8The diagram shows the protective cover 400 in the first position with the opening open; Figure 9 The illustration shows the protective cover 400 in the second position with the opening closed. The protective cover 400 slides open relative to the insulating shell 320 and slides in a plane parallel to the surface of the side wall 210. The plane parallel to the surface of the side wall 210 is not necessarily strictly parallel; it only needs to be approximately parallel.

[0074] In the technical solution of this application embodiment, the protective cover 400 is slidably configured relative to the insulating shell 320 to slide open or slide close. In this way, the space through which the protective cover slides is a flat two-dimensional sheet-like space. The thickness of this space is basically equal to the thickness of the protective cover itself, and it does not occupy additional external space. Therefore, the space utilization rate is improved and the energy density of the battery device is increased.

[0075] In some embodiments, the housing 200 includes a sidewall 210 that surrounds the housing circumferentially to form a receiving cavity. An output port 211 is provided on the sidewall 210. An opening in the insulating shell 320 corresponds to the output port 211. A protective cover 400 is configured to slide in a plane parallel to the surface of the sidewall 210.

[0076] refer to Figure 2 The side wall 210 is provided with an output port 211. For example, the side wall 210 has two output ports 211, namely a positive output port and a negative output port 211. The output port 211 extends through the thickness direction of the side wall 210 so that the end of the output electrode electrical connection piece located inside the side wall 210 can be exposed through the output port to achieve electrical connection with external electrical connectors.

[0077] In the technical solution of this application embodiment, the second end of the output electrode electrical connector 310 of the output electrode assembly 300 extends to the output port 211 so that the second end of the output electrode electrical connector 310 forms the external output interface of the battery device. This eliminates the need for an adapter, saving the space occupied by the adapter and its components, thereby improving the space utilization of the entire battery device and increasing its energy density. Furthermore, the protective cover slides in a plane parallel to the side wall surface. Thus, whether in the open or closed state, the projection of the protective cover is within the area covered by the side wall of the housing. The extra space occupied by the protective cover is only its own thickness, thus reducing the volume occupied and further improving the space utilization of the battery device, thereby increasing the energy density of the entire battery device.

[0078] Furthermore, the technical solution of this application first proposes that the second end of the output electrode connecting piece 310 directly forms the external output interface of the battery device, and at least a portion of the output electrode connecting piece 310 extends inside the side wall 210, so that the second end of the output electrode connecting piece 310 can be exposed through the output port 211 to directly form the external output interface, thereby saving the space occupied by the adapter. On this basis, by setting a sliding protective cover, the space occupied is further reduced and the energy density of the battery device is improved. In other words, it is precisely because the external output interface of this embodiment is exposed through the output port 211 opened on the side wall 210 to directly form the external output interface that the basis for setting the sliding protective cover is provided.

[0079] refer to Figure 5 In some embodiments, the second end of the output electrode electrical connector 310 is provided with a connection hole 3121. Specifically, a nut is provided at the connection hole 3121. The connection hole 3121 is configured to be electrically connected to an external electrical connector via the nut.

[0080] refer to Figure 5 In this embodiment, the second end of the output electrode connector 310 protrudes outward relative to the other parts. This outward protrusion refers to protruding towards the side wall 210, allowing this end to extend into the output port. A nut is integrated into the connection hole 3121. Specifically, the nut is located inside the connection hole 3121, that is, on the side closer to the battery cell.

[0081] The second end of the output electrode connecting piece in this embodiment is provided with a connecting hole 3121, and a nut is provided at the connecting hole 3121. Thus, when an external electrical connector is connected to the second end of the output electrode connecting piece, electrical connection can be achieved directly through the threaded engagement of a bolt and nut, simplifying operation and improving installation convenience. Furthermore, this embodiment achieves a good balance between conductivity and mechanical reliability by embedding a high-strength nut into the highly conductive output electrode connecting piece. The nut's strength is higher than that of the output electrode connecting piece, enabling it to withstand repeated tightening and loosening, thereby improving the operational reliability of the battery device.

[0082] In some embodiments, the nut includes a press-fit nut.

[0083] In other words, the nut is permanently fixed to the output electrode electrical connector 310 using a press-fitting process.

[0084] The nut in this embodiment is a press-fit nut. The press-fit nut forms an engagement with the output electrode electrical connection piece through riveting deformation, thereby improving the vibration resistance and further improving the reliability of the battery device.

[0085] refer to Figure 4 and Figure 7In some embodiments, the output electrode assembly 300 further includes an insulating shell 320 sleeved on the outside of the output electrode electrical connection piece 310. The insulating shell 320 is connected to the sidewall 210 and has an opening 320a. The opening 320a is configured to expose the connection hole 3121.

[0086] The insulating shell 320 has an inner cavity and its shape is adapted to fit the output electrode electrical connection piece 310, thus allowing the insulating shell 320 to be fitted over the outside of the output electrode electrical connection piece 310. (Reference) Figure 4 and Figure 5 The insulating shell 320 is also provided with a connector 370, which is used to connect with the side wall 210. The connector 370 can be an insert nut, which is connected to the side wall 210 by bolts.

[0087] The output electrode connector 310 typically carries high voltage. In this embodiment, the insulating shell 320 is sleeved on the outside of the output electrode connector 310 to insulate and isolate the output electrode connector 310 from the side wall 210, preventing high voltage leakage. Furthermore, the insulating shell 320 is connected to the side wall 210, thereby providing stable support for the output electrode connector 310.

[0088] In some embodiments, reference Figure 10 and Figure 11 The protective cover 400 includes a sheet-like structure.

[0089] refer to Figure 10 and Figure 11 The protective cover 400 has a thin sheet structure.

[0090] The technical solution of this application embodiment further reduces the thickness of the protective cover 400 itself and reduces the space occupied by setting the protective cover 400 as a sheet structure.

[0091] refer to Figure 7 and Figure 10 In some embodiments, the protective cover 400 is configured to slide relative to the insulating shell 320 in the longitudinal direction M. The insulating shell 320 includes a guide rail 321 located on at least one side of the opening 320a and extending in the longitudinal direction M, and a limiting top plate 322 disposed above the guide rail 321. The gap between the limiting top plate 322 and the guide rail 321 forms a guide channel. The protective cover 400 includes a cover body 410 and a slider 420 disposed on at least one side of the cover body 410, the slider 420 being movably disposed within the guide channel.

[0092] The protective cover 400 of this embodiment is slidably disposed in a plane parallel to the surface of the side wall 210, as shown in the reference. Figure 2 The surface of the sidewall 210 is perpendicular to the first direction X, therefore the sliding plane of the protective cover 400 is also perpendicular to the first direction X. Within this plane... Figure 10 As shown, the protective cover 400 is configured to slide along the longitudinal direction M, which is perpendicular to the transverse direction N. The protective cover 400 has an upper and lower end located at both ends of the longitudinal direction M, and a left and right side located on both sides of the transverse direction N. The protective cover 400 includes a cover body 410 and a slider 420 disposed on at least one side of the cover body 410 in the transverse direction N. Specifically... Figure 10 In the embodiment shown, the protective cover 400 includes two sliders 420 respectively disposed on the lateral sides of the cover body 410.

[0093] refer to Figure 7 The insulating shell 320 includes a guide rail 321 located on at least one side of the opening 320a and extending in the longitudinal direction M. Specifically, in one embodiment, the opening 320a is a square opening, and guide rails 321 are respectively provided on both sides of the opening 320a in the transverse direction N. Furthermore, a limiting top plate 322 is provided on the upper side of the guide rail 321. The limiting top plate 322 and the guide rail 321 are spaced apart in the thickness direction of the sidewall 210, such that the gap between the limiting top plate 322 and the guide rail 321 forms a guide channel. That is, the limiting top plate 322 located above the guide rail 321 refers to the upper side in the thickness direction of the sidewall 210. Thus, the slider 420 is embedded in the guide channel and slides along the guide rail 321 to open or close the opening.

[0094] The insulating shell 320 of this application embodiment is provided with a guide rail 321 and a limiting top plate 322 provided on the upper side of the guide rail 321. The limiting top plate 322 limits the slider 420 and prevents the protective cover from falling off the insulating shell 320.

[0095] refer to Figure 10 In some embodiments, the protective cover 400 further includes a first limiting block 430 disposed on the cover body 410. (See reference...) Figure 7 A limit groove 322a is provided on the limit top plate 322. (Reference) Figure 9 In the second position, the first limiting block 430 is engaged in the limiting groove 322a.

[0096] In this embodiment, the limiting groove 322a is provided on the limiting top plate 322, and the limiting top plate 322 is spaced apart from the guide rail 321. The first limiting block 430 on the protective cover 400 is engaged with the limiting groove 322a, and the slider 420 on the protective cover 400 is engaged with the guide rail 321. Therefore, the first limiting block 430 and the slider 420 on the protective cover 400 are not in the same position in the thickness direction of the protective cover 400.

[0097] The technical solution of this application embodiment limits the protective cover 400 by setting a limiting groove 322a to engage with the first limiting block 430. In this way, when the protective cover 400 is slid to the second position and the opening is closed, the protective cover 400 can remain in the closed position, thereby ensuring the isolation of the output electrode's external output interface from the outside world and improving safety and reliability.

[0098] refer to Figure 10 In some embodiments, the cover 410 is provided with a strip-shaped hole 411 extending from its longitudinal edge. The strip-shaped hole 411 is configured to make the cover 410 elastic in the transverse direction N, which is perpendicular to the longitudinal direction M.

[0099] refer to Figure 10 A strip-shaped hole 411 is provided at the lower edge of the cover 410 in the longitudinal direction M, and the strip-shaped hole 411 extends approximately along the longitudinal direction M. This makes the lower end of the cover 410 with the strip-shaped hole 411 elastic; when the side of the cover 410 in the transverse direction N is subjected to an inward pressing external force, the side of the cover 410 will retract inward. Specifically... Figure 10 In the illustrated embodiment, strip-shaped holes are provided on both the left and right sides of the cover 410. When the cover 410 is pressed inward from both sides, the two sides will retract inward, thereby causing the first limiting block 430 located on the side of the cover 410 to also retract inward and enter the limiting groove 322a to form a limit.

[0100] In some specific embodiments, the cover 410 is integrally molded and made of plastic.

[0101] The technical solution of this application embodiment provides a strip hole 411 on the cover 410 so that the cover 410 is elastic in the lateral direction N. The limiting can be achieved by pressing or releasing from the left and right sides of the cover 410. In other words, the limiting of the protective cover is achieved by the deformation of the cover 410 itself. The structure is simple and easy to operate, improving the convenience of opening and closing the protective cover.

[0102] In some embodiments, the protective cover 400 further includes a second limiting block 440 disposed on the cover body 410. The second limiting block 440 is located laterally inside the slider 420. A limiting strip 324 is disposed on the insulating shell 320, and in a first position, the second limiting block 440 is stopped by the limiting strip 324.

[0103] refer to Figure 11 The second limiting block 440 is located at the upper end of the cover 410 and on the lateral inner side of the slider 420. When the protective cover 400 is opened, refer to Figure 10 Slide the protective cover 400 from top to bottom, as shown in the reference. Figure 8When the protective cover 400 reaches the first position, the second limiting block 440 is stopped by the limiting strip 324, thereby keeping the protective cover 400 on the output electrode assembly.

[0104] When the protective cover 400 of this embodiment is in the first position, the second limiting block 440 is stopped by the limiting strip 324, so that the protective cover 400 is not separated from the output electrode assembly. Therefore, the protective cover 400 is not easy to be lost during transportation, storage or use, reducing the risk of damage caused by the exposure of the external output interface due to the loss of the protective cover, thereby improving the safety and reliability of the battery.

[0105] refer to Figure 7 In some embodiments, the insulating shell 320 further includes a plurality of positioning blocks 323 spaced apart in the circumferential direction. The positioning blocks 323 abut against the inner surface of the output port of the sidewall 210.

[0106] In this embodiment, the output electrode assembly is disposed on the inner side of the side wall 210 and needs to be electrically connected to the outside world through the output port of the side wall 210 to output electrical energy. During installation, the position of the insulating shell 320 of the output electrode assembly needs to be matched with the position of the output port to achieve precise positioning. (See reference...) Figure 7 The output port 211 of the side wall 210 is a square port. Therefore, four positioning blocks 323 are respectively located at the four corners of the square port on the insulating shell 320. The four positioning blocks 323 protrude from the insulating shell 320, so the four positioning blocks 323 can abut against the inner surface of the output port to achieve accurate positioning.

[0107] The insulating shell 320 of this application embodiment is provided with a plurality of positioning blocks 323 that abut against the inner surface of the output port. This allows the position of the insulating shell 320 to be accurately positioned relative to the position of the output port during assembly by means of the positioning blocks 323 abutting against the inner surface.

[0108] refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the output electrode assembly 300 further includes a blocking wall 330. The blocking wall 330 protrudes from the insulating housing 320 and is positioned beside the opening to increase the creepage distance.

[0109] refer to Figure 4The insulating shell 320 has an opening that exposes the connection hole 3121. This opening is approximately square. Furthermore, a protruding annular blocking wall 330 is provided on the inner edge of the opening of the insulating shell 320. The protruding annular blocking wall 330 provides an electrical barrier to the connection hole 3121, effectively increasing the effective creepage distance between the high-voltage connection hole 3121 and the side wall 210. In this embodiment, the insulating shell 320 of the output electrode assembly 300 has multiple protruding blocking walls 330 on its surface, creating a textured surface that effectively extends the creepage distance.

[0110] The blocking wall 330 provided on the insulating shell 320 of the output electrode assembly 300 in this embodiment of the application extends the creepage path of current on the surface of the insulating shell 320, effectively increases the creepage distance, thereby reducing the risk of arcing and improving the safety of the battery device.

[0111] In some embodiments, the blocking wall 330 and the insulating shell 320 are integrally formed by injection molding.

[0112] In this embodiment, the blocking wall 330 and the insulating shell 320 are integrally injection molded, effectively avoiding the problem of shortened creepage paths that may be caused by assembly gaps. This improves the integrity and continuity of the insulation barrier between the high-voltage output electrode connecting piece and the sidewall, ensuring consistent electrical insulation performance. Moreover, integral injection molding reduces assembly steps in production, effectively avoiding assembly errors caused by assembly, and improving production efficiency and product yield.

[0113] The external electrical connector can be a tab, which is bolted to the output electrode electrical connector 310. To avoid problems caused by insufficient bolt torque, stripped threads, or other manufacturing processes, in some embodiments, the insulating shell 320 is also provided with a first contact resistance detection hole 340 and a second contact resistance detection hole 360 ​​that are isolated from each other. The first contact resistance detection hole 340 is configured to allow the probe to pass through and contact the output electrode electrical connector 310. The second contact resistance detection hole 360 ​​is configured to allow the probe to pass through and contact the external electrical connector.

[0114] This embodiment of the application provides contact resistance detection holes on the insulating shell 320, which lead to the output electrode electrical connection piece 310 and the external electrical connector, respectively. This allows a probe to be directly inserted into the contact resistance detection holes to measure the resistance, ensuring that the bolt torque of each battery device remains at the same level, thus improving quality control during manufacturing. Furthermore, throughout the entire lifespan of the battery device, regular maintenance and inspection can be performed through these contact resistance detection holes, enabling timely detection and elimination of connection faults caused by loose bolts, effectively improving operational safety.

[0115] As mentioned above, the side wall 210 of this embodiment is provided with an output port so that the end of the output electrode connection piece 310 is exposed to form an external output interface. This output port is open to the outside. Therefore, in order to effectively prevent water and other contaminants from entering the housing from the output port, refer to... Figure 4 In some embodiments, the insulating shell 320 is connected to the side wall 210 and a sealing ring 350 is provided between the inner surfaces of the insulating shell 320 and the side wall 210.

[0116] refer to Figure 4 The insulating shell 320 has a sealing groove on the surface near the side wall 210. The sealing ring 350 is nested in the sealing groove. When the insulating shell 320 is fastened to the side wall by bolts or the like, the sealing ring is squeezed and deformed, filling the assembly gap between the insulating shell 320 and the side wall, thereby forming a reliable sealing barrier between the two.

[0117] The sealing ring can be an O-ring or a custom-shaped sealing ring. Specifically... Figure 4 In the illustrated embodiment, the sealing ring is an irregularly shaped sealing ring, comprising a square sealing ring segment extending circumferentially and enclosing the square sealing ring, and a circular sealing ring segment disposed on the outer side of the square sealing ring. The circular sealing ring segment is disposed on the outer circumferential side of the connector 370.

[0118] This embodiment of the application effectively prevents water, dust, and other contaminants from entering the casing from the output port by setting a sealing ring 350, thus effectively improving the operational reliability of the battery device. Furthermore, preventing the intrusion of these contaminants ensures the dryness and cleanliness of the casing interior, guarantees the insulation protection of the high-voltage circuit, avoids safety hazards such as short circuits and arcing caused by condensation or other impurities, and ensures electrical safety.

[0119] As described above, in this embodiment of the application, one end of the output electrode connector 310 is connected to the battery cell 100, and the other end extends to the output port of the side wall 210 and is directly formed as an external power output interface. During the transportation of the battery device, vibration and other issues may cause relative movement between the two ends of the output electrode connector 310, resulting in stress being transmitted to the connection between the output electrode connector 310 and the battery cell 100. For example, when welding is performed, stress may be transmitted to the weld seam, causing connection failure.

[0120] To address this issue, this application proposes that the output electrode electrical connection piece 310 may be a bent structure and include a first segment 311 and a second segment 312 distributed in its extension direction, as well as a bent segment 313 disposed between the first segment 311 and the second segment 312, wherein the bent segment 313 includes a multilayer metal foil 3131.

[0121] The multilayer metal foil 3131 can be formed into an integral structure by diffusion welding. Compared with the solid structure, the bent section 313 formed by the multilayer metal foil 3131 has strong ductility and flexibility. When the second section 312 of the output electrode connecting piece 310 undergoes relative displacement, the stress causes the multilayer metal foil 3131 to undergo flexible and integral deformation. This allows the stress to be dissipated in the bent section 313, preventing the stress from being transmitted to the connection point with the battery cell, thereby improving the connection reliability between the output electrode connecting piece and the battery cell.

[0122] In some embodiments, the bending section 313 is a soft aluminum bar, specifically a 1-series soft aluminum bar.

[0123] In this application embodiment, the first segment of the output electrode connector is connected to the terminal post of the battery cell. In order to improve the strength of the connection between the two, in some embodiments, the first segment 311 includes solid metal.

[0124] The solid metal mentioned here refers to metal material that has been pressed into a thin shape through processes such as rolling and stamping. For example, the solid metal can be integrally formed through a stamping process. Specifically, the first segment 311 can be solid aluminum.

[0125] The first segment 311 of the output electrode connecting piece 310 in this embodiment of the application includes solid metal, which has high strength and can better achieve the connection with the battery cell.

[0126] In some embodiments, the first segment 311 is a 1-series hard aluminum bar. Since the first segment 311 is welded to the terminal post of the battery cell, the use of a 1-series hard aluminum bar has good conductivity, which can effectively reduce resistance and improve current conduction efficiency.

[0127] In other embodiments, the second segment 312 comprises solid metal.

[0128] The second segment 312 needs to be assembled with external electrical connectors. Therefore, the second segment 312 is made of solid metal, which can provide a stronger support surface for assembly and ensure sufficient connection strength and contact pressure.

[0129] In some embodiments, the second segment 312 is a 6-series hard aluminum bar.

[0130] The strength of the output electrode connecting piece in this embodiment is arranged in a regional manner, including a first segment 311 and a second segment 312 located at both ends, and a bent segment 313 disposed between the first segment 311 and the second segment 312. The first segment 311 and the second segment 312 are made of hard aluminum alloy, while the bent segment 313 is made of soft aluminum alloy and has a layered structure. Because the bent segment 313 has a layered structure, to prevent delamination from affecting the welding strength, the bent segment 313 is lap-welded to the first segment 311 and the second segment 312. The welding can be laser welding or friction stir welding.

[0131] In some embodiments, the output electrode connector is made of aluminum.

[0132] In other embodiments, this application also provides an energy storage device, including the battery device 1000 described above, which stores electrical energy.

[0133] The following is based on Figures 2 to 11 The structure of a battery device according to a specific embodiment of this application will be described in detail.

[0134] like Figure 2 As shown, the battery device 1000 of this embodiment includes a housing 200 and a plurality of battery cells 100 disposed inside the housing 200. The battery device 1000 of this embodiment can be a battery module. The housing 200 includes four side walls 210 arranged circumferentially. One of the side walls 210 is provided with two output ports 211, which are respectively located at both ends of the side wall 210 and are respectively a positive output port and a negative output port. The output port 211 extends through the thickness direction of the side wall 210 so that the end of the output electrode electrical connection piece located inside the side wall 210 can be exposed through the output port to realize electrical connection with external electrical connectors.

[0135] like Figure 3 and Figure 4 As shown, the output electrode assembly 300 includes an output electrode electrical connection piece 310 and an insulating shell 320 disposed on the outside of the output electrode electrical connection piece 310.

[0136] like Figure 5 As shown, the output electrode connector 310 includes a first segment 311, a bent segment 313, and a second segment 312. The first segment 311 is disposed at the top of at least two battery cells 100, and the second segment 312 is disposed on the side of at least two battery cells 100 and located inside the sidewall 210. The bent segment 313 has a bent structure for connecting the first segment 311 and the second segment 312 located on different surfaces.

[0137] like Figure 5 As shown, the edge of the first segment 311 is provided with at least one recess 3111. The recess 3111 extends through the thickness direction of the first segment 311, which can improve the stress concentration problem of the first segment 311, thereby reducing the possibility of deformation failure and surface cracking of the first segment 311 under conditions such as transportation and vibration. At the same time, when the current flowing through the first segment 311 is too large, the first segment 311 can melt at the location of the recess 3111, thereby reducing the risk of damage to the battery device due to overload or short circuit, and thus improving the performance of the battery device.

[0138] The second segment 312 includes a main segment 3122 and an end segment 3124 located near the side wall 210 relative to the main segment 3122. The end segment 3124 is provided with a connecting hole 3121. The end segment 3124 and the main segment 3122 are connected by an inclined transition segment 3123.

[0139] like Figure 4 , Figure 7 and Figure 8 As shown, the insulating shell 320 of this embodiment is provided with a blocking wall 330, a first contact resistance detection hole 340, a second contact resistance detection hole 360, a sealing ring 350 and a connector 370.

[0140] The insulating shell 320 is provided with an opening that exposes the connection hole 3121. Specifically, the opening is a square opening that exposes the end 3124.

[0141] In this embodiment, the battery device directly exposes the end of the output electrode connector to form an external output interface, eliminating the need for a connector adapter. This reduces unnecessary space occupation and improves space utilization. Furthermore, eliminating the need for a connector adapter also reduces the number of plugs and other parts that connect to the connector, thus lowering costs.

[0142] Furthermore, such as Figure 6 As shown, in this embodiment, the first segment 311 and the second segment 312 of the output electrode electrical connector 310 are solid metal (hard metal bar), and the bent segment 313 has a layered structure to form a soft metal bar.

[0143] The connecting piece in this embodiment includes a hard metal bar located at both ends and a soft metal bar located between the two hard metal bars. The soft metal bar and the hard metal bar are lap-welded together, which can effectively absorb the relative movement between different parts of the output electrode connecting piece under transportation / vibration conditions and reduce the stress concentration problem in the weld area between the output electrode connecting piece and the battery cell.

[0144] By setting a contact resistance detection hole, the contact resistance between the external electrical connector (bar plate) and the output electrode electrical connector can be effectively detected after assembly to ensure that the bolts are properly tightened.

[0145] like Figure 8 and Figure 9 As shown, the battery device in this embodiment also includes a protective cover 400 for closing or opening the opening. For example... Figure 10 and Figure 11 As shown, the protective cover 400 includes a cover body 410, a slider 420, a first limiting block 430, a second limiting block 440, and a raised handle 450.

[0146] The cover 410 is generally square, and sliders 420 are respectively provided on the left and right sides of the cover 410. Slider 420 includes a first slider 421 and a second slider 422 spaced apart in the longitudinal direction M. The first slider 421 is located at the upper end of the cover 410 in the longitudinal direction M, and the second slider 422 is located at the lower end of the cover 410. The spaced-apart first slider 421 and second slider 422 ensure that they can guide the cover through the guide channel at different positions in the longitudinal direction M, thus making the sliding of the cover more stable.

[0147] Two first limiting blocks 430 are respectively provided on the left and right sides of the cover 410. A second limiting block 440 is also provided on the lower side of the upper end of the cover 410.

[0148] A raised handle 450 is provided at the lower end of the upper surface of the cover 410 to facilitate sliding of the cover 410 by pushing it through the raised handle 450.

[0149] The cover 410 has a strip-shaped hole 411 so that the lower end of the cover 410 is elastic.

[0150] The insulating shell 320 is provided with a guide rail 321 and a limiting top plate 322 provided on the upper side of the guide rail 321. The limiting top plate 322 is provided with a limiting groove 322a. When the protective cover 400 is in the second position with the opening closed, such as Figure 7 As shown, the first limiting block 430 is engaged within the limiting groove 322a to limit the protective cover 400 onto the output electrode assembly, ensuring reliable closure. Figure 8 As shown, the second limiting block 440 abuts against the limiting strip 324 to prevent the protective cover from detaching, so that the protective cover can remain on the output electrode assembly even when it is in the open state, thus preventing the protective cover from being lost.

[0151] In the longitudinal direction M, the limiting top plate 322 includes a first top plate segment 3221 and a second top plate segment 3222. A notch is provided between the first top plate segment 3221 and the second top plate segment 3222, and a limiting groove 322a is provided on the second top plate segment 3222. In this way, when installing the protective cover 400, the protective cover 400 can be inserted into the guide rail 321 through the notch.

[0152] The first top plate section 3221 has a trapezoidal structure so that the end of the protective cover 400 is exposed, which makes it easier for the user to determine whether the protective cover 400 has been slid into place.

[0153] When the protective cover is installed on the output terminal, the two ends of the cover body 410 deform under external pressure, generating a certain elastic force, which keeps the protective cover tightly against the output terminal. When it is necessary to remove the protective cover, only a slight external force needs to be applied to deform the two ends of the cover body 410, thereby easily removing the protective cover.

[0154] The cover 410 of this embodiment can be used multiple times through the above design, ensuring the stability and reliability of the protective cover even during repeated opening and closing. Space optimization is particularly important in lithium battery design. The above-described protective cover better adapts to the compact battery pack structure, improving the overall compactness and efficiency of the design.

[0155] 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 in that, include: A battery pack, comprising at least two individual battery cells (100). The housing (200) has a receiving cavity for accommodating the battery pack; The output electrode assembly (300) includes an output electrode electrical connector (310) and an insulating shell (320) sleeved on the outside of the output electrode electrical connector (310). A first end of the output electrode electrical connector (310) is electrically connected to the battery pack, and a second end of the output electrode electrical connector (310) forms an external power output interface of the battery device. The insulating shell (320) has an opening configured to expose the external power output interface. and A protective cover (400) is configured to be slidably disposed relative to the insulating shell (320) to switch between a first position with the opening open and a second position with the opening closed.

2. The battery device according to claim 1, characterized in that, The housing (200) includes a sidewall (210) that surrounds the circumferential direction to form the receiving cavity, an output port (211) is provided on the sidewall (210), the opening of the insulating shell (320) corresponds to the position of the output port (211), and the protective cover (400) is configured to slide in a plane parallel to the surface of the sidewall (210).

3. The battery device according to claim 1, characterized in that, The protective cover (400) comprises a sheet-like structure.

4. The battery device according to claim 1, characterized in that, The protective cover (400) is configured to slide relative to the insulating shell (320) in a longitudinal direction (M). The insulating shell (320) includes a guide rail (321) located on at least one side of the opening and extending in the longitudinal direction (M) and a limiting top plate (322) disposed above the guide rail (321). The gap between the limiting top plate (322) and the guide rail (321) forms a guide channel. The protective cover (400) includes a cover body (410) and a slider (420) disposed on at least one side of the cover body (410). The slider (420) is movably disposed within the guide channel.

5. The battery device according to claim 4, characterized in that, The protective cover (400) also includes a first limiting block (430) disposed on the cover body (410), and a limiting groove (322a) is provided on the limiting top plate (322). In the second position, the first limiting block (430) is engaged in the limiting groove (322a).

6. The battery device according to claim 5, characterized in that, The cover (410) is provided with a strip hole (411) opened from the longitudinal edge. The strip hole (411) is configured to make the cover (410) elastic in the transverse direction (N), which is perpendicular to the longitudinal direction (M).

7. The battery device according to claim 4, characterized in that, The protective cover (400) also includes a second limiting block (440) disposed on the cover body (410). The second limiting block (440) is located on the lateral inner side of the slider (420). A limiting strip (324) is disposed on the insulating shell (320). In the first position, the second limiting block (440) is stopped by the limiting strip (324).

8. The battery device according to claim 1, characterized in that, The insulating shell (320) also includes a plurality of positioning blocks (323) spaced apart in the circumferential direction, the positioning blocks (323) being used to abut against the inner surface of the output port of the side wall (210) of the housing.

9. The battery device according to any one of claims 1 to 8, characterized in that, The output electrode assembly (300) further includes a blocking wall (330) that protrudes from the insulating shell (320) and is disposed beside the opening to increase the creepage distance.

10. The battery device according to any one of claims 1 to 8, characterized in that, A sealing ring (350) is provided between the insulating shell (320) and the inner surface of the box.

11. The battery device according to any one of claims 1 to 8, characterized in that, The output electrode electrical connector (310) has a bent structure and includes a first segment, a second segment distributed in its extension direction, and a bent segment disposed between the first segment and the second segment, the bent segment comprising multiple layers of metal foil.

12. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 11, wherein the battery device provides electrical energy.

13. An energy storage device, characterized in that, The battery device includes any one of claims 1 to 11, wherein the battery device stores electrical energy.

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