Battery device and electric appliance

Abstract

The application relates to the battery technical field and provides a battery device and a power utilization equipment, which can solve the technical problem that a sealing element is prone to falling out. The battery device comprises a box body, a cover body, a battery monomer and a connecting structure, the box body is provided with an accommodating space; the cover body is arranged at an opening of the box body to close the accommodating space; the battery monomer is arranged in the accommodating space; the connecting structure comprises a connecting assembly and a sealing element, the connecting assembly penetrates through the cover body along a first direction; the sealing element is sealingly arranged between the connecting assembly and the cover body, the sealing element comprises a first limiting surface, the cover body comprises a second limiting surface, and the first limiting surface and the second limiting surface abut at least along the first direction.

Description

Technical Field

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

[0002] As a load-bearing and connecting component, the mounting structure undertakes functions such as stable connection between the battery pack and the vehicle chassis, integrated fixation of multiple components, and airtight protection of the battery pack. In related technologies, the sealing rings of the mounting structure are prone to detachment. Utility Model Content

[0003] This application provides a battery device and electrical equipment that can improve the positional stability of the seal and maintain its good sealing performance.

[0004] The first aspect of this application provides a battery device, including a housing, a cover, a battery cell, and a connecting structure. The housing has a receiving space; the cover is disposed at the opening of the housing to close the receiving space; the battery cell is disposed within the receiving space; the connecting structure includes a connecting component and a sealing element, the connecting component extending through the cover along a first direction; the sealing element is sealed between the connecting component and the cover, the sealing element includes a first limiting surface, the cover includes a second limiting surface, and the first limiting surface and the second limiting surface abut against each other at least along the first direction.

[0005] The battery device provided in this application includes a housing and a cover. The housing forms an accommodating space, and the cover can be disposed at the opening of the housing to close the accommodating space. A single battery cell is disposed within the accommodating space. The cover and housing provide restraint and protection for the battery cell within the accommodating space. The housing and cover also have a connecting structure to allow the battery device to connect with an external structure. The connecting structure includes a connecting component and a seal. The connecting component penetrates the cover along a first direction to connect with the housing. The seal is disposed between the connecting component and the cover to achieve a seal between them. Since the seal has a first restraining surface and the cover has a second restraining surface, the first and second restraining surfaces abut against each other at least along the first direction. During the disassembly of the connecting component relative to the cover, the restraint of the seal by the cover maintains the relative position of the seal and the cover, reducing the possibility of the seal detaching with the connecting component, thus ensuring good sealing performance during subsequent assembly. Compared with related technologies where the seal can easily detach along with the connecting components, the battery device of this application has a first limiting surface and a second limiting surface that can limit the seal by the cover, reducing the impact of the connecting components' disassembly and assembly process on the position of the seal, so as to maintain the good sealing performance of the seal.

[0006] In some embodiments of this application, the seal is provided with a recess, and the cover includes an extension that extends into the recess. The inner wall of the recess forms a first limiting surface, and the outer wall of the extension forms a second limiting surface.

[0007] Here, the seal is provided with a recess, and the extension formed by the cover extends into the recess. The inner wall of the recess and the outer wall of the extension form a first limiting surface and a second limiting surface, respectively, so as to form a snap-locking structure. The structure is simple and has a good limiting effect.

[0008] In some embodiments of this application, the recess includes a first inner wall and a second inner wall disposed opposite to each other, the first inner wall abutting at least along a first direction on the side of the extension facing the receiving space; the second inner wall abutting at least along the first direction on the side of the extension away from the receiving space.

[0009] Here, the first and second inner walls, which are arranged opposite to each other in the recess, can abut against the two sides of the extension, so as to achieve two opposite directions of limiting, thereby improving the limiting effect of the cover on the sealing element.

[0010] In some embodiments of this application, the first inner wall and the second inner wall are evenly spaced along a first direction.

[0011] Here, because the spacing between the first inner wall and the second inner wall is uniform along the first direction, the structure of the recess is more regular and easier to process and shape.

[0012] In some embodiments of this application, the extension extends into the recess along a second direction, which is perpendicular to the first direction.

[0013] Here, the second direction in which the extension enters the recess is perpendicular to the first direction of the cover's limiting action, reducing the component of the cover's limiting action in other directions, so that the cover can provide more effective limiting.

[0014] In some embodiments of this application, the recess includes a third inner wall that abuts against the extension at least along a second direction, the second direction being the direction in which the extension extends into the recess.

[0015] Here, by abutting the third inner wall against the extension in the second direction, the extension can take into account both the limiting in the first direction and the limiting in the second direction, reducing the possibility of the seal shaking in the second direction and further improving the positioning accuracy of the seal.

[0016] In some embodiments of this application, the seal surrounds the axis of the connecting assembly along a first direction; the recess is disposed on the outer peripheral side of the seal and surrounds the central axis of the seal throughout its entire circumference.

[0017] Here, by providing recesses around the entire circumference of the seal, the extension of the cover can easily extend into the recesses, and the seal can be limited by the extension throughout the entire circumference, thus improving the uniformity of the limiting.

[0018] In some embodiments of this application, there are at least two recesses, and at least two recesses are arranged around the axis of the connecting assembly along the first direction.

[0019] Here, at least two recesses are provided around the axis of the connecting assembly along the first direction. Multiple recesses can improve the limiting effect, and the sidewalls of multiple recesses can also provide axial limiting, reducing the possibility of the seal rotating relative to the cover.

[0020] In some embodiments of this application, the connecting component includes a first connector connected to the housing; the sealing component includes a first protrusion surrounding the axis of the first connector along a first direction, and the first protrusion sealingly abuts against the first connector at least along the first direction.

[0021] Here, the sealing element is provided with a first protrusion corresponding to the first connector. The first protrusion seals against the first connector at least along the first direction to achieve a seal between the first connector and the cover. The first protrusion is arranged around the axis of the first connector to provide all-round sealing protection.

[0022] In some embodiments of this application, there are at least two first protrusions, and at least two first protrusions are nested around the connecting assembly along the axis of a first direction.

[0023] Here, by setting at least two first protrusions, and the at least two first protrusions are nested, a multi-layer seal is formed, which can still provide an effective seal and improve the fault tolerance rate even if some of the first protrusions fail.

[0024] In some embodiments of this application, the connecting assembly further includes a second connector disposed on the side of the cover opposite to the receiving space; and the second connector extends and connects to the first connector; the seal includes a second protrusion, the first protrusion surrounds the axis of the first connector along a first direction, and the second protrusion seals against the second connector at least along the first direction.

[0025] Here, the sealing element is provided with a second protrusion corresponding to the second connector. The second protrusion at least seals against the second connector in the first direction to achieve a seal between the second connector and the cover. The second protrusion is arranged around the axis of the first connector to provide all-round sealing protection.

[0026] In some embodiments of this application, the second connector includes a connecting portion connected to the first connector; the seal is provided with an avoidance notch, the position of which corresponds to the connecting portion.

[0027] Here, the second connector is provided with a connecting part to facilitate the connection between the second connector and the first connector. The seal is provided with an avoidance notch corresponding to the connecting part to reduce possible interference of the seal on the connecting part and facilitate the connection between the second connector and the first connector.

[0028] A second aspect of this application provides an electrical device, including the battery device of the first aspect, the battery device being used to provide electrical energy.

[0029] The electrical equipment provided in this application includes a battery device of the first aspect. The battery device is provided with a first limiting surface and a second limiting surface, which can realize the limiting of the cover on the seal, reduce the impact of the disassembly and assembly of the connecting components on the position of the seal, so as to maintain the good sealing performance of the seal. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of this application;

[0033] Figure 2 This is an exploded structural diagram of the battery device according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of an explosion of a single battery cell in a battery device according to an embodiment of this application.

[0035] Figure 4 This is a schematic diagram (axonometric view) of the battery device according to an embodiment of this application.

[0036] Figure 5 This is a top-view structural diagram of the battery device according to an embodiment of this application;

[0037] Figure 6 Examples of embodiments of this application Figure 5 Schematic diagram of the structure cut along the AA section in the middle;

[0038] Figure 7 This is a cross-sectional view of the connecting component and the cover in the battery device according to an embodiment of this application;

[0039] Figure 8 Examples of embodiments of this application Figure 7 A magnified schematic diagram of the local structure at point B;

[0040] Figure 9 This is a cross-sectional structural diagram of the cover and seal in the battery device according to an embodiment of this application;

[0041] Figure 10 This is a partial structural diagram of the seal in the battery device according to an embodiment of this application;

[0042] Figure 11 Examples of embodiments of this application Figure 10 A magnified schematic diagram of the structure at point C.

[0043] Explanation of reference numerals in the attached figures:

[0044] M10 - Battery assembly; 100 - Housing; 110 - Accommodation space; 120 - Liquid cooling plate; 130 - Bottom protective plate; 140 - Middle crossbeam; 200 - Cover; 210 - Extension; 211 - Second limiting surface; 300 - Battery cell; 310 - Housing; 320 - Electrode assembly; 330 - End cap; 400 - Connecting assembly; 410 - First connector; 420 - Second connector; 421 - Connecting part; 430 - Third connector; 440 - Fourth connector; 500 - Sealing element; 510 - Recess; 511 - First limiting surface; 5111 - First inner wall; 5112 - Second inner wall; 512 - Third inner wall; 520 - First protrusion; 530 - Second protrusion; 540 - Clearance notch; M20 - Power unit; Z - First direction; X - Second direction; L - Axis. Detailed Implementation

[0045] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0047] 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.

[0048] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" 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.

[0049] 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.

[0050] 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 are in an "or" relationship.

[0051] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., 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 do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0054] The following is a detailed description of this application.

[0055] Battery devices typically include a mounting structure that can be connected to the support frame of electrical equipment. The mounting structure can also secure additional structures to the battery device, such as charge / discharge controllers and battery management systems, which are connected to the battery device via the mounting structure.

[0056] Taking the installation of a battery pack in a vehicle as an example, the mounting structure, as a load-bearing and connecting component, undertakes functions such as stable connection between the battery pack and the vehicle chassis, integrated fixation of multiple components, and airtight protection of the battery pack. The mounting structure can be deployed at the central crossbeam of the battery pack. Through a modular design concept, it achieves integrated rigid fastening and sealing protection of multiple components, providing structural assurance for the safe and stable operation of the battery pack under complex driving conditions. The mounting structure is a multifunctional component in the vehicle's powertrain system.

[0057] In some technical solutions, the mounting structure includes an adapter sleeve and a top sleeve. The top surface of the adapter sleeve has a sealing groove. The sealing ring is pressed into the sealing groove at the upper end of the adapter sleeve, and the seal between the top cover and the adapter sleeve is achieved through interference fit. The top cover clamps and compresses the sealing ring through the preload generated by tightening the top sleeve. During testing or after-sales disassembly of the top cover, the sealing ring is prone to sticking to the top cover, causing it to detach from the sealing groove of the adapter sleeve. After reinstalling the top cover, there is a risk of missing the sealing ring or damage to the sealing structure.

[0058] This application discloses a battery device and an electrical appliance. The battery device includes a housing and a cover. The housing forms an accommodating space, and the cover can be disposed at the opening of the housing to close the accommodating space. A battery cell is disposed within the accommodating space. The cover and housing provide limiting and protection for the battery cell within the accommodating space. The housing and cover are also provided with a connecting structure to connect the battery device to an external structure. The connecting structure includes a connecting component and a sealing element. The connecting component penetrates the cover along a first direction so that it can pass through the cover and connect to the housing. The sealing element is disposed between the connecting component and the cover to achieve a seal between them. Since the sealing element has a first limiting surface and the cover has a second limiting surface, the first limiting surface and the second limiting surface abut against each other at least along the first direction. During the disassembly of the connecting component relative to the cover, the sealing element is kept in a relatively stable position due to the limiting effect of the cover on the sealing element, reducing the possibility of the sealing element coming off with the connecting component, thus ensuring good sealing performance during subsequent assembly. Compared with related technologies where the seal can easily detach along with the connecting components, the battery device of this application embodiment is provided with a first limiting surface and a second limiting surface, which can limit the seal by the cover, reduce the impact of the connecting components' disassembly and assembly process on the position of the seal, so as to maintain the good sealing performance of the seal.

[0059] Electrical equipment can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] The battery device disclosed in this application can be used in electrical equipment that uses batteries as a power source, or as an energy storage device. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0061] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0062] Figure 1 , Figure 2 and Figure 3 The diagram illustrates the structure of a vehicle as provided in some embodiments of this application. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. Figure 1 and Figure 2 As shown, a battery unit M10 is installed inside the vehicle. The battery unit M10 can be located at the bottom, front, or rear of the vehicle. The battery unit M10 can be used to power the vehicle; for example, the battery unit M10 can serve as the vehicle's operating power source. The vehicle may also include a power unit M20, which may include a controller and a motor. The controller is used to control the battery unit M10 to supply power to the motor, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0063] In some embodiments of this application, the battery device M10 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0064] Figure 2 This is an exploded view of a battery device M10 provided in some embodiments of this application. The battery device M10 (Battery Apparatus) mentioned in the embodiments of this application may also include one or more battery cell assemblies (not shown in the figure, please refer to the combination of multiple battery cells 300) for providing voltage and capacity. A battery cell assembly may include multiple battery cells 300, which are connected in series, parallel, or mixed connection through a busbar.

[0065] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 300.

[0066] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells 300 arranged and fixed to form an independent module.

[0067] As an example, a battery module can be formed by bundling multiple battery cells 300 together with cable ties.

[0068] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the battery device M10 can be a battery pack, which includes a housing 100 and one or more battery cell assemblies housed within a cavity.

[0069] As an example, the battery cell assembly can be a battery module, which can be housed within the cavity by fixing the battery module within the cavity.

[0070] As an example, the battery cell assembly can also be housed in the cavity by directly fixing multiple battery cells 300 to the cavity.

[0071] As an example, such as Figure 2 , Figure 4 and Figure 5 As shown, the battery device M10 may include a first housing portion (e.g., housing 100) and a second housing portion (e.g., cover 200). The first housing portion and the second housing portion are fastened together, forming a closed space, or cavity, inside the housing 100 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing portion may be a top cover or a bottom plate.

[0072] In some embodiments, the housing 100 may be part of the vehicle's chassis structure. For example, a portion of the housing 100 may be at least a portion of the vehicle's floor, or a portion of the housing 100 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0073] In this embodiment of the application, the battery cell 300 can be a secondary battery. A secondary battery refers to a battery cell 300 that can be used again after being discharged by recharging to activate the active materials.

[0074] The battery cell 300 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.

[0075] Additionally, by way of example, the battery cell 300 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 300 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells. There are no particular limitations in the embodiments of this application.

[0076] Reference Figure 3 In some embodiments, the housing 310 includes an end cap 330 and a housing with an opening. The end cap 330 closes the opening to form a sealed space for accommodating the electrode assembly 320 and substances such as electrolytes. The housing may have one or more openings. The end cap 330 may also be provided in one or more manner.

[0077] In some embodiments, the housing 310 is provided with at least one electrode terminal, which is electrically connected to the electrode tab. The electrode terminal can be directly connected to the electrode tab, or it can be indirectly connected to the electrode tab through an adapter. The electrode terminal can be provided on the end cap 330 or on the housing.

[0078] In some embodiments, a pressure relief mechanism is provided on the housing 310. The pressure relief mechanism is used to release the internal pressure of the battery cell 300.

[0079] A battery cell 300 typically includes an electrode assembly 320. The electrode assembly 320 includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell 300, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits while allowing active ions to pass through.

[0080] In some embodiments, the electrode assembly 320 further includes an isolator disposed between the positive and negative electrodes.

[0081] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0082] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride, and ceramic.

[0083] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0084] In some embodiments, the battery cell 300 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel-like, or solid.

[0085] In some embodiments, the electrode assembly 320 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0086] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0087] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0088] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0089] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0090] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0091] In some embodiments, the electrode assembly 320 may be cylindrical, flat, or polygonal in shape.

[0092] In some embodiments, the electrode assembly 320 is provided with tabs that can conduct current from the electrode assembly 320. The tabs include a positive tab and a negative tab.

[0093] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 This application provides a battery device M10, including a housing 100, a cover 200, a battery cell 300, and a connecting structure. The housing 100 is provided with a receiving space 110; the cover 200 is disposed at the opening of the housing 100 to close the receiving space 110; the battery cell 300 is disposed within the receiving space 110; the connecting structure includes a connecting component 400 and a sealing element 500, the connecting component 400 penetrating through the cover 200 along a first direction Z; the sealing element 500 is sealed between the connecting component 400 and the cover 200, the sealing element 500 includes a first limiting surface 511, the cover 200 includes a second limiting surface 211, and the first limiting surface 511 and the second limiting surface 211 abut against each other at least along the first direction Z.

[0094] The technical solution of this application embodiment includes a battery device M10 comprising a housing 100 and a cover 200. The housing 100 forms an accommodating space 110. The cover 200 can be disposed at the opening of the housing 100 to close the accommodating space 110. A battery cell 300 is disposed within the accommodating space 110. The cover 200 and the housing 100 provide limiting and protection for the battery cell 300 within the accommodating space 110. The housing 100 and the cover 200 are also provided with a connecting structure to connect the battery device M10 to an external structure.

[0095] Based on this, the connection structure includes a connecting component 400 and a sealing element 500. The connecting component 400 penetrates the cover 200 along the first direction Z so that the connecting component 400 can pass through the cover 200 and connect with the housing 100. The sealing element 500 is sealed between the connecting component 400 and the cover 200 to achieve a seal between the connecting component 400 and the cover 200. Since the sealing element 500 is provided with a first limiting surface 511 and the cover 200 is provided with a second limiting surface 211, the first limiting surface 511 and the second limiting surface 211 abut against each other at least along the first direction Z. During the process of disassembling the connecting component 400 relative to the cover 200, the sealing element 500 is limited by the cover 200, which can maintain the relative position of the sealing element 500 and the cover 200, reducing the possibility of the sealing element 500 coming off with the connecting component 400, so that good sealing performance can still be maintained in subsequent assembly.

[0096] Compared with related technologies where the seal 500 can easily detach along with the connecting assembly 400, the battery device M10 of this application embodiment is provided with a first limiting surface 511 and a second limiting surface 211, which can limit the seal 500 by the cover 200, reduce the impact of the connecting assembly 400 on the position of the seal 500 during disassembly and assembly, so as to maintain the good sealing performance of the seal 500.

[0097] In some examples, the housing 100 includes a bottom wall and side walls. The bottom wall is opposite to the cover 200, and the bottom wall and side walls enclose a receiving space 110. The bottom wall may be provided with a liquid cooling plate 120 to improve the temperature regulation function of the battery device M10. The bottom wall may also be provided with a bottom protective plate 130 and other structures to improve the load-bearing capacity of the housing 100.

[0098] In some examples, the housing 100 also includes crossbeams and / or longitudinal beams, which can form sidewalls. Alternatively, the crossbeams and longitudinal beams are arranged within the receiving space 110 to enhance the structural strength of the housing 100. The connecting structure can be connected to the crossbeams or longitudinal beams.

[0099] In some examples, the connecting structure is located at the position of the central beam 140, the connecting component 400 passes through the cover 200 and is connected to the central beam 140, the end of the connecting component 400 located outside the receiving space 110 is used to connect to the external structure, and a seal 500 is provided between the connecting component 400 and the cover 200 to provide a sealing function.

[0100] In some examples, the connecting assembly 400 includes a first connector 410 and a second connector 420, which clamp and fix the cover 200. The first connector 410 is connected to the housing 100 to achieve a stable connection between the connecting structure and the housing 100 and the cover 200. The connecting assembly 400 structurally improves the rigid connection between the components and effectively disperses the high-frequency vibration, sudden impact load and high and low temperature cycle stress that the battery device M10 is subjected to during vehicle operation.

[0101] In some examples, multiple components in the connecting assembly 400 are coaxially assembled. For instance, the first connector 410 and the second connector 420 are plugged into each other and are coaxially arranged. Through the coaxial assembly process of multiple components, the spatial accuracy of the internal structure of the battery device M10 is improved, providing accurate benchmark support for the subsequent vehicle assembly and the layout of internal components of the battery device M10, and significantly improving the assembly efficiency and structural reliability of the battery device M10.

[0102] In some examples, the components of the connecting assembly 400 are precisely fitted together, for example by threaded fit, and a seal 500 is provided at the contact point between the cover 200 and the connecting structure. The elastic compression deformation of the seal 500 achieves efficient sealing of the contact point, providing effective protection for the airtightness of the battery device M10. The improvement in airtightness also helps to improve the electrical safety and service life of the battery device M10.

[0103] In some examples, the connecting assembly 400 also includes a third connector 430 and a fourth connector 440 connected to the housing 100. For example, the second connector 420 is connected to a crossbeam or longitudinal beam of the housing 100, and the third connector 430 passes through the corresponding crossbeam or longitudinal beam. The third connector 430 can be coaxially connected to the second connector 420. The other end of the third connector 430 is coaxially connected to the fourth connector 440. The fourth connector 440 passes through the bottom plate or bottom guard plate 130 of the housing 100 to extend to the outside of the housing 100. The fourth connector 440 can be used as a mounting connection position similar to the second connector 420. A sealing element 500 according to the embodiments of this application can also be provided between the fourth connector 440 and the bottom guard plate 130.

[0104] Among them, the multiple connectors in the connecting assembly 400 serve as effective connection and sealing nodes for the battery device M10, effectively providing reliable airtightness and reducing the intrusion of external moisture, dust, salt spray and other impurities into the battery device M10, thereby reducing problems such as electrical short circuits, component corrosion and decreased insulation performance caused by the intrusion of external moisture and other impurities.

[0105] In some examples, the cover 200 of the battery device M10 has an opening at the position corresponding to the connecting component 400. This opening is precisely matched with the outer diameter of the second connector 420. After the second connector 420 passes through the opening, it is precisely connected to the internal thread at the end of the first connector 410 through the external thread. During the thread tightening process, a stable axial preload is generated, which tightly clamps the cover 200 between the connector and the second connector 420.

[0106] In some examples, the cover 200 is a stamped part with a thin sheet structure. There may be a small gap between the opening of the cover 200 and the mating part of the connecting assembly 400, which may become a weak point for gas leakage. By setting a seal 500 here, the seal 500 can be an elastic structure. The seal 500 fills the gap by compression deformation, blocking the gas flow channel, thereby achieving an efficient seal.

[0107] In some examples, the seal 500 cooperates with the connecting assembly 400, and when the connecting assembly 400 is locked to the cover 200 and the housing 100, the compression ratio of the seal 500 can be greater than or equal to 15% and less than or equal to 30% in order to achieve a good sealing function.

[0108] In some examples, the compressibility ratio of seal 500 refers to the ratio of the difference in size between the compressed and uncompressed states of seal 500 to its uncompressed state size. For example, seal 500 can be compressed along a first direction Z. In its uncompressed state, seal 500 has a first size along the first direction Z. In its maximum compressed state, seal 500 has a second size along the first direction Z. The first size is larger than the second size. The difference between the first size and the second size is the compressed size, and the ratio of this compressed size to the first size is the compressibility ratio.

[0109] In some examples, the seal 500 has a high compression ratio, which can produce greater elastic deformation, thereby achieving a more effective seal; the seal 500 with a higher compression ratio has good compressive strength and good dimensional adaptability.

[0110] In some examples, the seal 500 has a low compression ratio. The low compression ratio results in a small dimensional change of the seal 500 during deformation, which helps to save space and reduces the pressure of the elastic force of the seal 500 on other components. The seal 500 with a low compression ratio has good resilience and is not prone to plastic deformation.

[0111] In some examples, the compression ratio of seal 500 is greater than or equal to 15% and less than or equal to 22%, for example, the compression ratio of seal 500 can be 15%, 17%, 19%, 20% or 22% etc.; in other examples, the compression ratio of seal 500 is greater than or equal to 22% and less than or equal to 30%, for example, the compression ratio of seal 500 can be 22%, 23%, 25%, 27%, 29% or 30% etc.

[0112] In some examples, the outer contour of the battery device M10 is approximately rectangular. The length or width direction of the battery device M10 can be a second direction X, and the height direction of the battery device M10 can be a first direction Z. The first direction Z is perpendicular to the second direction X. It should be noted that the second direction X can be any direction perpendicular to the first direction Z.

[0113] In some examples, the first limiting surface 511 can be a plane or a curved surface; the second limiting surface 211 can be a plane or a curved surface, and the first limiting surface 511 and the second limiting surface 211 can be in line contact or surface contact, for example, at least part of the first limiting surface 511 and the second limiting surface 211 are in contact.

[0114] In some examples, the first limiting surface 511 and the second limiting surface 211 abut against each other at least along the first direction Z, meaning that the first limiting surface 511 and the second limiting surface 211 can abut against each other along the first direction Z; or, the abutting direction of the first limiting surface 511 and the second limiting surface 211 has an abutting component force along the first direction Z, for example, the abutting direction of the first limiting surface 511 and the second limiting surface 211 has an acute angle or an obtuse angle with the first direction Z.

[0115] In some examples, there may be multiple different contact directions between the first limiting surface 511 and the second limiting surface 211. As long as at least one of the contact directions has a component force along the first direction Z, the limiting of the cover 200 on the seal 500 along the first direction Z can be achieved.

[0116] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11In some embodiments of this application, the seal 500 is provided with a recess 510, and the cover 200 includes an extension 210 that extends into the recess 510. The inner wall of the recess 510 forms a first limiting surface 511, and the outer wall of the extension 210 forms a second limiting surface 211.

[0117] In the technical solution of this application embodiment, the sealing member 500 is provided with a recess 510, and the extension 210 formed by the cover 200 extends into the recess 510. The inner wall of the recess 510 and the outer wall of the extension 210 respectively form a first limiting surface 511 and a second limiting surface 211 to form a snap-locking structure. The structure is simple and has a good limiting effect.

[0118] In some examples, the recess 510 forms a first limiting surface 511 facing the inner wall of the receiving space 110; in other examples, the recess 510 forms a first limiting surface 511 away from the inner wall of the receiving space 110; in still other examples, the two inner walls of the recess 510 opposite each other along the first direction Z both form the first limiting surface 511.

[0119] In some other embodiments of this application, the inner wall of the opening of the cover 200 is provided with a recess 510, and the seal 500 is provided with an extension 210 corresponding to the recess 510. The extension 210 of the seal 500 extends into the recess 510 of the cover 200, thereby limiting the seal 500 of the cover 200 along the first direction Z.

[0120] In some embodiments of this application, a first limiting surface 511 is formed on the outer surface of the sealing member 500 facing the receiving space 110, and the cover 200 can restrict the sealing member 500 from dislodging from the receiving space 110 in the first direction Z; or, the first limiting surface 511 is formed on the outer surface of the sealing member 500 away from the receiving space 110, and the cover 200 can restrict the sealing member from dislodging from the receiving space 110 in the first direction Z.

[0121] In some examples, the extension 210 of the cover 200 refers to the portion of the cover 200 that can extend into the recess 510 to form a limiting position. The extension 210 may have a boundary with other parts of the cover 200. For example, the extension 210 may be bent relative to other parts of the cover 200, or the extension 210 may be a partially protruding structure. In other examples, the extension 210 may smoothly transition with other parts of the cover 200, and the size of the extension 210 may depend on the size of the recess 510.

[0122] In some examples, a recessed groove is provided on the outer periphery of the seal 500 to form a recess 510. The dimension of the recess 510 along the first direction Z can be consistent with or similar to the dimension of the cover 200 along the first direction Z. The depth of the recess 510 (the dimension along the outer periphery of the seal 500 towards the inner periphery) matches the opening of the cover 200. The seal 500 can be snapped into the inside of the opening of the cover 200, with the upper surface of the recess 510 fitting against the upper surface of the cover 200 and the lower surface of the recess 510 fitting against the lower surface of the cover 200, achieving bidirectional limiting and reducing the possibility of the seal 500 moving upward or downward along the first direction Z and thus falling off.

[0123] In some examples, the seal 500 has a recessed groove forming a recess 510 on its exterior, which engages with the opening edge (extension 210) of the cover 200 to snap the seal 500 into the inner ring of the opening of the cover 200.

[0124] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the recess 510 includes a first inner wall 5111 and a second inner wall 5112 disposed opposite to each other. The first inner wall 5111 at least abuts against the side of the extension 210 facing the receiving space 110 along the first direction Z; the second inner wall 5112 at least abuts against the side of the extension 210 away from the receiving space 110 along the first direction Z.

[0125] In the technical solution of this application embodiment, the first inner wall 5111 and the second inner wall 5112 disposed opposite to each other in the recess 510 can respectively abut against the two sides of the extension 210 so as to achieve two opposite directions of limiting, thereby improving the limiting effect of the cover 200 on the seal 500.

[0126] In some examples, the first inner wall 5111 and the second inner wall 5112 are arranged opposite each other along the first direction Z. The first inner wall 5111 and the second inner wall 5112 can adopt the same structural form. For example, the first inner wall 5111 and the second inner wall 5112 are both set as planes. The first inner wall 5111 and the second inner wall 5112 can also adopt different structural forms. For example, the first inner wall 5111 is set as a plane and the second inner wall 5112 is set as a curved surface.

[0127] In some examples, the entire surface of the first inner wall 5111 is fitted with the extension 210, while in other examples, a portion of the first inner wall 5111 is fitted with the extension 210. It should be noted that when projected onto the same projection plane along the first direction Z, the size of the projection of the extension 210 can be less than or equal to the size of the projection of the first inner wall 5111.

[0128] In some examples, the entire surface of the second inner wall 5112 is fitted with the extension 210; in other examples, a portion of the second inner wall 5112 is fitted with the extension 210. It should be noted that when projected onto the same projection plane along the first direction Z, the size of the projection of the extension 210 can be less than or equal to the size of the projection of the second inner wall 5112.

[0129] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the first inner wall 5111 and the second inner wall 5112 are evenly spaced along the first direction Z.

[0130] In the technical solution of this application embodiment, since the first inner wall 5111 and the second inner wall 5112 are evenly spaced along the first direction Z, the structure of the recess 510 is more regular and easier to process and form.

[0131] In some examples, the first inner wall 5111 can be divided into multiple first regions, and the second inner wall 5112 can be divided into multiple second regions. The multiple first regions and the second regions are set in a one-to-one correspondence along the first direction Z. The spacing between the first inner wall 5111 and the second inner wall 5112 along the first direction Z is uniformly set, which means that the error of the spacing between different first regions and the corresponding second regions along the first direction Z is less than a preset error. For example, the preset error can be 3%.

[0132] In some other possible embodiments of this application, the spacing between the first inner wall 5111 and the second inner wall 5112 along the first direction Z can be gradually set or non-uniformly set.

[0133] In some examples, the distance between the first inner wall 5111 and the second inner wall 5112 gradually decreases along the first direction Z from the outer peripheral side to the inner peripheral side of the seal 500, and the recess 510 is configured as an open structure.

[0134] In other examples, along the outer peripheral side of the seal 500 toward the inner peripheral side, the distance between the first inner wall 5111 and the second inner wall 5112 gradually increases along the first direction Z, and the recess 510 is configured as a closing structure.

[0135] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the extension 210 extends into the recess 510 along the second direction X, and the second direction X is perpendicular to the first direction Z.

[0136] In the technical solution of this application embodiment, the second direction X of the extension 210 extending into the recess 510 is perpendicular to the first direction Z of the cover 200 limiting, which reduces the component of the limiting effect of the cover 200 in other directions, so that the cover 200 can provide more effective limiting.

[0137] In some examples, the second direction X can be any direction perpendicular to the first direction Z. For example, the second direction X is the length direction of the battery device M10. Another example is that the extension 210 is arranged around the central axis L of the recess 510, and the extension 210 is inserted into the recess 510 in a full circle. The second direction X is the direction from the outer peripheral side of the seal 500 to the inner peripheral side.

[0138] In some other possible embodiments of this application, the direction in which the extension 210 extends into the recess 510 has an acute or obtuse angle with the first direction Z, and the extension 210 is inclined relative to the first direction Z.

[0139] In some examples, along the depth direction of the recess 510, the recess 510 gradually moves away from the receiving space 110, and the extension 210 can be configured as an inclined structure away from the receiving space 110. For example, the extension 210 extends into the recess 510 in an upward oblique direction.

[0140] In other examples, along the depth direction of the recess 510, the recess 510 gradually approaches the receiving space 110, and the extension 210 can be configured as an inclined structure toward the receiving space 110. For example, the extension 210 extends into the recess 510 in a downward direction.

[0141] In some examples, the seal 500 is configured as a deformable structure, for example, the seal 500 is configured as an elastically deformable structure, the seal 500 changes the structure or orientation of the recess 510 by deformation, thereby facilitating the extension 210 to extend into the recess 510 and improving the ease of assembly.

[0142] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the recess 510 includes a third inner wall 512, which abuts against the extension 210 at least along a second direction X, where the second direction X is the direction in which the extension 210 extends into the recess 510.

[0143] The technical solution of this application embodiment, by abutting the third inner wall 512 and the extension 210 along the second direction X, enables the extension 210 to take into account the limiting of the first direction Z and the limiting of the second direction X, reducing the possibility of the seal 500 shaking along the second direction X, and further improving the positioning accuracy of the seal 500.

[0144] In some examples, the third inner wall 512 is set as a plane; in other examples, the third inner wall 512 is set as a curved surface, and the third inner wall 512 can be set to be concave or convex; the third inner wall 512 can be in partial contact or full contact with the end face of the extension 210.

[0145] In some examples, the bottom surface of the recess 510 of the seal 500 forms a third inner wall 512, which contacts and limits the inner wall of the opening of the cover 200, reducing the possibility of the seal 500 moving and falling off in the second direction X. The installation limit of the seal 500 is upgraded from the limit in the first direction Z to the combined limit in the first direction Z and the second direction X, making it difficult for the seal 500 to fall off in multiple different directions.

[0146] In some examples, the end face of the extension 210 faces the bottom surface of the recess 510 of the seal 500, and the end face of the extension 210 can be set as a wedge-shaped surface or be chamfered; or, a chamfer is provided at the opening of the recess 510, and the wedge-shaped surface and the chamfer can form a guide structure to facilitate the extension 210 to extend into the recess 510.

[0147] Reference Figure 7 and Figure 10 In some embodiments of this application, the seal 500 surrounds the connecting assembly 400 along the axis L of the first direction Z; the recess 510 is disposed on the outer peripheral side of the seal 500, and the recess 510 surrounds the central axis L of the seal 500 around its entire circumference.

[0148] The technical solution of this application embodiment provides a recess 510 around the entire circumference of the sealing member 500, which facilitates the extension 210 of the cover 200 to extend into the recess 510. The entire circumference of the sealing member 500 can be limited by the extension 210, thereby improving the uniformity of the limiting.

[0149] In some examples, the seal 500 is configured as an annular structure, and the seal 500 surrounds the connecting assembly 400 along the axis L of the first direction Z. The surrounding profile of the seal 500 can be a regular or irregular shape such as a circle, ellipse, square, or hexagon. For example, the seal 500 is configured as an annular structure.

[0150] In some examples, multiple extensions 210 are provided, and the multiple extensions 210 are arranged sequentially around the connecting assembly 400 along the axis L of the first direction Z to form an annular structure. The multiple extensions 210 can extend into the annular recess 510 from multiple different directions.

[0151] In some examples, the shape of the extension 210 is adapted to the shape of the recess 510. The extension 210 is configured as a ring structure. The extension 210 surrounds the axis L of the connecting assembly 400 along the first direction Z. The extension 210 and the recess 510 fit together around the entire circumference, which has a good snap-fit ​​and limiting effect.

[0152] In some embodiments of this application, there are at least two recesses 510, and at least two recesses 510 are arranged around the axis L of the connecting assembly 400 along the first direction Z.

[0153] The technical solution of this application embodiment provides at least two recesses 510 surrounding the connecting component 400 along the axis L of the first direction Z. The multiple recesses 510 can improve the limiting effect, and the sidewalls of the multiple recesses 510 can also provide axial limiting, reducing the possibility of the seal 500 rotating relative to the cover 200.

[0154] In some examples, there are multiple recesses 510 (including two), the number of extensions 210 does not exceed the number of recesses 510, and each extension 210 is provided with a recess 510 corresponding to its position. For example, multiple recesses 510 and multiple extensions 210 are provided in a one-to-one correspondence.

[0155] In some examples, multiple recesses 510 may be evenly spaced along the circumference of the seal 500; in other examples, the spacing between recesses 510 and adjacent recesses 510 along the circumference of the seal 500 may be different.

[0156] In some examples, multiple recesses 510 may be symmetrically distributed about the seal 500. This symmetry may be centrally symmetrical or axially symmetrical. For example, four recesses 510 may be centrally symmetrically distributed about the geometric center of the seal 500.

[0157] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the connecting component 400 includes a first connector 410, which is connected to the housing 100; the sealing component 500 includes a first protrusion 520, which surrounds the first connector 410 along the axis L of the first direction Z, and the first protrusion 520 seals against the first connector 410 at least along the first direction Z.

[0158] In the technical solution of this application embodiment, the sealing member 500 is provided with a first protrusion 520 corresponding to the first connector 410. The first protrusion 520 seals against the first connector 410 at least along the first direction Z, so as to achieve a seal between the first connector 410 and the cover 200. The first protrusion 520 is arranged around the axis L of the first connector 410 to provide all-round sealing protection.

[0159] In some examples, the first protrusion 520 is an annular structure, and the cross-sectional shape of the first protrusion 520 can be a regular or irregular shape such as a semi-circle, semi-ellipse, triangle, rectangle, rhombus, trapezoid, or hexagon. For example, the cross-section of the first protrusion 520 is elongated, and the end of the cross-section facing the first connector 410 is rounded so that the first protrusion 520 can deform.

[0160] In some examples, the protrusion located between the cover 200 and the first connector 410 is a first protrusion 520. The first protrusion 520 is in close contact with the bottom surface of the groove at the end of the first connector 410. When the second connector 420 is tightened to generate a pre-tightening force, the first protrusion 520 is elastically deformed by the axial compression of the cover 200 and the first connector 410, filling the tiny gap between them and forming the first sealing barrier.

[0161] In some examples, the inner ring of the support surface (the surface facing the cover 200) of the first connector 410 is provided with a groove, which fits in close contact with the surface of the seal 500. When the cover 200 is installed and clamped, the seal 500 is compressed along the first direction Z. The depth of the groove (the dimension along the first direction Z) can be set to 70% to 85% of the height (the dimension along the first direction Z) of the first protrusion 520 of the seal 500 in the free state (uncompressed state). The compression rate of the first protrusion 520 after compression can be set to 15% to 30% in order to achieve the sealing function.

[0162] Reference Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, there are at least two first protrusions 520, and at least two first protrusions 520 are nested around the connecting assembly 400 along the axis L of the first direction Z.

[0163] The technical solution of this application embodiment provides a multi-layer seal by setting at least two first protrusions 520 and nesting them. Even if some of the first protrusions 520 fail, it can still provide an effective seal and improve the fault tolerance rate.

[0164] In some examples, the multiple first protrusions 520 provided on the seal 500 may have the same or different cross-sectional shapes. For example, the seal 500 is provided with two first protrusions 520 having the same cross-sectional shape so that the two first protrusions 520 have the same deformation.

[0165] In some examples, at least two first protrusions 520 are nested, meaning that multiple first protrusions 520 surround the connecting assembly 400 along the axis L of the first direction Z, and the radial dimensions of two adjacent first protrusions 520 are different, with one first protrusion 520 able to surround the outer periphery of another first protrusion 520.

[0166] In some examples, there is a gap between two adjacent first protrusions 520 so that both first protrusions 520 can achieve two deformations, for example, along the second direction X, the distance between two adjacent first protrusions 520 does not exceed the size of a single first protrusion 520 along the second direction X.

[0167] Reference Figure 8 , Figure 9 , Figure 10 and Figure 11 In some embodiments of this application, the connecting assembly 400 further includes a second connector 420 disposed on the side of the cover 200 away from the receiving space; and the second connector 420 extends and connects to the first connector 410; the sealing member 500 includes a second protrusion 530, the first protrusion 520 surrounds the first connector 410 along the axis L of the first direction Z, and the second protrusion 530 seals against the second connector 420 at least along the first direction Z.

[0168] In the technical solution of this application embodiment, the sealing member 500 is provided with a second protrusion 530 corresponding to the second connector 420. The second protrusion 530 at least seals against the second connector 420 along the first direction Z so as to achieve a seal between the second connector 420 and the cover 200. The second protrusion 530 is arranged around the axis L of the first connector 410 so as to provide all-round sealing protection.

[0169] In some examples, the second protrusion 530 is an annular structure, and the cross-sectional shape of the second protrusion 530 can be a regular or irregular shape such as a semicircle, semi-ellipse, triangle, rectangle, rhombus, trapezoid, or hexagon. For example, the cross-section of the first protrusion 520 is triangular in order to produce elastic deformation.

[0170] In some examples, the seal 500 can be a single-sided seal, for example, a first protrusion 520 is provided between the cover 200 and the first connector 410 to achieve a seal; in other examples, the seal 500 can be a double-sided seal, for example, a first protrusion 520 is provided between the cover 200 and the first connector 410 to achieve a seal, and a second protrusion 530 is provided between the cover 200 and the second connector 420 to achieve a seal. The compression ratio of the seal 500 and the second connector 420 can be set to 15% to 30% to achieve the sealing function.

[0171] In some examples, the seal 500 has a protrusion on one side, which can achieve a compression rate of 15% to 30%; in other examples, the seal 500 has protrusions on both opposite sides, and when both protrusions (e.g., the first protrusion 520 and the second protrusion 530) are in a compressed state, the sum of the compression dimensions of the two protrusions makes the compression rate 15% to 30%.

[0172] In some examples, the seal 500 has sealing protrusions on both sides facing the first connector 410 and the second connector 420. The sealing function of the seal 500 is achieved by elastic compression of the protrusions on both sides, forming an efficient double-layer sealing protection system.

[0173] In some examples, the seal 500 has an upwardly protruding second protrusion 530 on the side facing the second connector 420. The second protrusion 530 can cooperate with the groove of the inner ring of the support surface of the second connector 420. When the cover 200 is installed and clamped, the seal 500 is compressed along the first direction Z, and the second protrusion 530 undergoes elastic deformation, thereby achieving the sealing of the seal 500. Furthermore, the second protrusion 530 on the top surface of the seal 500 and the first protrusion 520 on the bottom surface can cooperate to achieve a double-layer sealing function.

[0174] In some examples, the second protrusion 530 located on the top surface of the cover 200 contacts and engages with the bottom surface of the groove at the bottom of the second connector 420. Under the pre-tightening force of the second connector 420, the second protrusion 530 undergoes elastic compression, forming a second sealing barrier. This double-layer sealing design, through two independent sealing contact surfaces, greatly improves sealing reliability. Even if one sealing surface experiences slight wear or aging due to long-term use, the other sealing surface can still guarantee the sealing effect, effectively avoiding the airtightness risks caused by single-point seal failure, and significantly improving the fault tolerance and reliability of the sealing system.

[0175] Reference Figure 7 and Figure 8 In some embodiments of this application, the second connector 420 includes a connecting portion 421, which is connected to the first connector 410; the sealing member 500 is provided with an avoidance notch 540, the position of which corresponds to the connecting portion 421.

[0176] In the technical solution of this application embodiment, the second connector 420 is provided with a connecting portion 421 so that the second connector 420 can be connected with the first connector 410. The sealing member 500 is provided with an avoidance notch 540 corresponding to the connecting portion 421 so as to reduce possible interference of the sealing member 500 with the connecting portion 421 and facilitate the connection between the second connector 420 and the first connector 410.

[0177] In some examples, the seal 500 has an inner peripheral side and an outer peripheral side, the outer peripheral side is provided with a recess 510 to cooperate with the cover 200, the inner peripheral side faces the outer peripheral wall of the first connector 410 or the second connector 420, and the inner peripheral side of the seal 500 is provided with a clearance notch 540 to avoid the first connector 410 or the second connector 420.

[0178] In some examples, the second connector 420 is threaded to the first connector 410, and the outer peripheral wall of the second connector 420 is provided with threads to form a connection portion 421. The inner peripheral side of the seal 500 is opposite to the outer peripheral wall of the second connector 420, and there is a gap between the inner peripheral side of the seal 500 and the outer peripheral wall of the second connector 420. This gap forms an avoidance notch 540 so that the connector avoids the connection portion 421 of the second connector 420.

[0179] In some examples, the inner ring of the support surface (the surface facing the cover 200) of the first connector 410 is provided with a first recess, and a portion of the seal 500 can be accommodated in the first recess to save height space of the connection structure along the first direction Z.

[0180] In some examples, the inner ring of the support surface (the surface facing the cover 200) of the second connector 420 is provided with a second recess, in which a portion of the seal 500 can be accommodated, so as to save the height space of the connection structure along the first direction Z.

[0181] Reference Figure 1 In some embodiments of this application, the electrical device includes a battery device M10 according to embodiments of this application, which is used to provide electrical energy.

[0182] The technical solution of this application embodiment includes the battery device M10 of this application embodiment. The battery device M10 is provided with a first limiting surface 511 and a second limiting surface 211, which can realize the limiting of the cover 200 on the seal 500, reduce the influence of the connection component 400 disassembly and assembly process on the position of the seal 500, so as to maintain the good sealing performance of the seal 500.

[0183] In some examples, the electrical device is a vehicle, and the battery unit M10 may be located at the bottom, front, or rear of the vehicle. The battery unit M10 can be used to power the vehicle; for example, the battery unit M10 can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, the controller being used to control the battery unit M10 to supply power to the power unit M20, for example, for the vehicle's starting, navigation, and operating power needs.

[0184] In one possible embodiment of this application, the battery device M10 is provided with a connecting structure. The connecting component 400 of the connecting structure is connected to the crossbeam or longitudinal beam of the housing 100, and the connecting component 400 passes through the cover 200 to connect with external components. The connecting component 400 includes four components: a first connecting member 410 (e.g., an adapter sleeve), a second connecting member 420 (e.g., a top sleeve), a third connecting member 430 (e.g., a middle sleeve), and a fourth connecting member 440 (e.g., a bottom sleeve). Each component of the connecting component 400 can be made of high-strength alloy material through precision machining. The precision-machined thread structure forms a cooperative fastening system, thereby achieving axial clamping and fixing of the battery device M10 cover 200, crossbeam, liquid cooling plate 120, bottom protective plate 130, and other structures, forming a through-type overall stable structure.

[0185] A sealing element 500 can be installed between the connecting component 400 and the cover 200. The sealing element 500 is manufactured using an integrated injection molding process, which improves the dimensional accuracy and structural consistency of the sealing element 500. To maintain the stability and durability of the sealing performance, the sealing element 500 can be made of materials such as rubber, or DPDM polymer material. The compression of the sealing element 500 is controlled within the range of 15% to 30% to provide reliable sealing function.

[0186] A recess 510 is provided on the outer periphery of the seal 500 to form a slot. The dimensional parameters of the recess 510 are optimized through precise calculation and simulation so that the dimension of the recess 510 along the first direction Z can be consistent with the thickness dimension of the cover 200 along the first direction Z. The depth of the recess 510 (the dimension along the second direction X) is precisely matched with the radial dimension of the opening of the cover 200 to form a firm snap-fit ​​positioning structure.

[0187] During assembly, the seal 500 is inserted into the inner side of the opening of the cover 200, so that the bottom surface of the recess 510 of the seal 500 is in close contact with the inner wall of the opening of the cover 200, forming a reliable radial (e.g., second direction X) limit, effectively preventing the seal 500 from moving or falling off along the second direction X (e.g., horizontal directions such as X / Y); the upper and lower surfaces (first inner wall 5111 and second inner wall 5112) of the recess 510 are respectively in close contact with the upper and lower surfaces of the cover 200, forming a firm axial (e.g., first direction Z) limit, reducing the possibility of the seal 500 moving off along the Z direction (e.g., vertical direction), so as to maintain the positional stability of the seal 500 during assembly and use, and provide structural guarantee for the durability of the sealing effect.

[0188] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery device, characterized in that, include: The container is equipped with storage space; A cover is provided at the opening of the box to close the containing space; A single battery cell is disposed within the accommodating space; A connection structure includes a connection component and a seal, the connection component extending through the cover body in a first direction; the seal is sealed between the connection component and the cover body, the seal includes a first limiting surface, the cover body includes a second limiting surface, and the first limiting surface and the second limiting surface abut against each other at least in the first direction.

2. The battery device according to claim 1, characterized in that, The sealing element is provided with a recess, and the cover includes an extension that extends into the recess. The inner wall of the recess forms the first limiting surface, and the outer wall of the extension forms the second limiting surface.

3. The battery device according to claim 2, characterized in that, The recess includes a first inner wall and a second inner wall disposed opposite to each other. The first inner wall abuts against the side of the extension facing the receiving space at least along the first direction. The second inner wall abuts against the side of the extension away from the receiving space at least along the first direction.

4. The battery device according to claim 3, characterized in that, The first inner wall and the second inner wall are evenly spaced along the first direction.

5. The battery device according to any one of claims 2-4, characterized in that, The extension extends into the recess along a second direction, which is perpendicular to the first direction.

6. The battery device according to any one of claims 2-4, characterized in that, The recess includes a third inner wall that abuts against the extension at least along a second direction, the second direction being the direction in which the extension extends into the recess.

7. The battery device according to any one of claims 2-4, characterized in that, The seal surrounds the axis of the connecting assembly along the first direction; the recess is disposed on the outer peripheral side of the seal, and the recess surrounds the central axis of the seal throughout its entire circumference.

8. The battery device according to any one of claims 2-4, characterized in that, There are at least two recesses, and at least two of the recesses are arranged around the axis of the connecting assembly along the first direction.

9. The battery device according to any one of claims 2-4, characterized in that, The connecting component includes a first connector, which is connected to the housing. The seal includes a first protrusion that surrounds the axis of the first connector along the first direction, and the first protrusion seals against the first connector at least along the first direction.

10. The battery device according to claim 9, characterized in that, There are at least two first protrusions, and at least two first protrusions are nested around the connecting assembly along the axis of the first direction.

11. The battery device according to claim 9, characterized in that, The connecting assembly further includes a second connector, which is disposed on the side of the cover opposite to the receiving space; and the second connector extends and connects to the first connector. The seal includes a second protrusion, the first protrusion surrounds the axis of the first connector along the first direction, and the second protrusion seals against the second connector at least along the first direction.

12. The battery device according to claim 11, characterized in that, The second connector includes a connecting portion, which is connected to the first connector; The seal is provided with an avoidance notch, the position of which corresponds to the connection part.

13. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 12, the battery device being used to provide electrical energy.

Images