Battery device and electric device

Abstract

The embodiment of the present application provides a battery device and a power utilization device, which comprise a plurality of battery monomers, a mounting component and a limiting piece. The plurality of battery monomers are arranged along a first direction. The mounting component is used for mounting the battery device on an external structure, and the mounting component is arranged on one side of the plurality of battery monomers along the first direction. The mounting component comprises a body part and a connecting part. The connecting part is fixedly connected with the body part and protrudes from the body part along the first direction. The limiting piece is arranged on one side of the plurality of battery monomers along a second direction and extends along the first direction. The limiting piece is used for restricting the expansion of the plurality of battery monomers along the first direction. The second direction is perpendicular to the first direction. The limiting piece is at least partially arranged in a stack with the connecting part and is fixedly connected with the connecting part, so that the reliability of the battery device can be improved.

Description

Technical Field

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

[0002] Current battery devices often use mounting components to attach the battery device to an external structure. However, the mounting components isolate the upper space of the battery device, making it difficult to set up limiting components to restrain the expansion of individual battery cells. Setting up limiting components to avoid the mounting components would occupy additional space, and the connection strength of segmented limiting components is limited, thus affecting the reliability of the battery device.

[0003] Therefore, improving the reliability of battery devices has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] In a first aspect, a battery device is provided, comprising a plurality of battery cells, a mounting member, and a limiting member. The plurality of battery cells are arranged along a first direction. The mounting member is used to mount the battery device to an external structure and is disposed on one side of the plurality of battery cells along the first direction. The mounting member includes a body portion and a connecting portion, the connecting portion being fixedly connected to the body portion and protruding from the body portion along the first direction. The limiting member is disposed on one side of the plurality of battery cells along a second direction and extends along the first direction. The limiting member is used to constrain the expansion of the plurality of battery cells along the first direction, the second direction being perpendicular to the first direction. The limiting member is at least partially stacked with and fixedly connected to the connecting portion.

[0006] In the technical solution provided in this application embodiment, by setting a connecting part protruding from the main body on the mounting component, and making the limiting member at least partially overlapped with the connecting part and fixedly connected, the space occupied by the structure can be reduced and the force transmission path can be optimized, thereby improving the reliability of the limiting member in constraining the expansion of the battery cell, and thus improving the reliability of the battery device.

[0007] In some embodiments, the limiting member has a first through hole extending along its own thickness direction, and the connecting part has a second through hole extending along the thickness direction of the limiting member; the battery device further includes: a fastener, which passes through the first through hole and the second through hole to fix the limiting member and the connecting part.

[0008] In the technical solution provided in this application embodiment, the mechanical fixation of the limiting part and the connecting part is achieved by the cooperation of the first through hole, the second through hole and the fastener, thereby alleviating the risk of structural deformation and fatigue failure caused by the hot welding process, thereby improving the stability of assembly flatness and connection strength, and thus improving the reliability of the battery device.

[0009] In some embodiments, the limiting member is provided with a plurality of first through holes extending along its own thickness direction, and the connecting part is provided with a plurality of second through holes extending along the thickness direction of the limiting member; the plurality of first through holes and the plurality of second through holes are correspondingly arranged.

[0010] In the technical solution provided in this application embodiment, the load is distributed and transferred at multiple points by the corresponding cooperation of multiple sets of first through holes and second through holes, reducing the local stress concentration of a single fastening node, enhancing the load-bearing capacity and fatigue resistance of the connection structure, thereby improving the reliability of the battery device.

[0011] In some embodiments, the mounting member includes a first member and a second member disposed along a second direction, the first member and the second member being separated at a connection portion; wherein fasteners are provided through the first through hole and the second through hole to fix the first member and the second member.

[0012] In the technical solution provided in this application embodiment, the mounting component is divided into a first component and a second component that are divided along the second direction, and the combination of the components and the fixing of the limiting component are realized simultaneously by using through fasteners, which simplifies the structural assembly process and improves space utilization and assembly convenience.

[0013] In some embodiments, a receiving groove or through cavity is formed at the mating point of the first member and the second member; wherein a portion of the limiting member is disposed within the receiving groove or through cavity.

[0014] In the technical solution provided by the embodiments of this application, the limiting member is covered by the receiving groove or through cavity formed by the first component and the second component, which provides good geometric constraints and protection for the limiting member, reduces the possibility of the limiting member slipping under force and spatial interference with other electrical components, and can improve the compactness of the overall structure, thereby improving the reliability of the battery device.

[0015] In some embodiments, the end face of the connecting portion facing away from the main body portion along a first direction is provided with a receiving groove, and the end of the limiting member is received in the receiving groove and fixedly connected to the connecting portion.

[0016] In the technical solution provided in this application embodiment, the end of the limiting member is inserted and accommodated by the receiving groove on the end face of the connecting part, forming a good alignment guidance and lateral limiting, which can absorb assembly and manufacturing tolerances, improve the force transmission state, and thereby improve the reliability of the battery device.

[0017] In some embodiments, the mounting member is provided with a through cavity, which extends through the mounting member from the connecting portion along a first direction; wherein, the limiting member passes through the through cavity and is fixedly connected to the connecting portion.

[0018] In the technical solution provided in this application embodiment, by accommodating an integrated limiting member through a through-cavity that penetrates the mounting component along the first direction, the structural continuity and mechanical bearing capacity of the limiting member body are preserved, the number of connection nodes is reduced, and the resistance to expansion and tension is improved. This enhances the reliability of the battery device.

[0019] In some embodiments, the mounting member includes a mounting sleeve, the mounting sleeve including a third through hole extending along a second direction, and the limiting member is provided with an avoidance hole corresponding to the position of the third through hole.

[0020] In the technical solution provided in this application embodiment, the third through hole of the mounting sleeve and the clearance hole on the limiting member are interconnected and cooperate with each other, so that the external mounting pin can be smoothly locked. At the same time, the pin is used to achieve the lateral stop of the limiting member, which can simultaneously realize the mounting function and the anti-expansion limiting requirement, thereby improving the reliability of the battery device.

[0021] In some embodiments, the mounting member has a through cavity extending along a first direction, the through cavity penetrating the mounting member from the connecting portion; the connecting portion includes a first extension and a second extension, the first extension and the second extension being respectively disposed on both sides of the body portion along the first direction; the limiting member includes a first limiting member and a second limiting member, wherein the first limiting member passes through the opening of the through cavity located in the first extension and is fixedly connected to the first extension, and the second limiting member passes through the opening of the through cavity located in the second extension and is fixedly connected to the second extension.

[0022] In the technical solution provided in this application embodiment, the first limiting member and the second limiting member are inserted into the openings on both sides of the through cavity and fixedly connected to each other, realizing a rear-mounted split assembly, reducing the transportation and manufacturing costs of components, and improving the convenience of on-site assembly of the battery device. This improves the reliability of the battery device.

[0023] In some embodiments, the mounting member includes a mounting sleeve, the mounting sleeve including a third through hole extending along a second direction; the end of the first limiting member located in the through cavity is provided with a first relief groove, and the end of the second limiting member located in the through cavity is provided with a second relief groove, both the first relief groove and the second relief groove being arranged around the third through hole.

[0024] In the technical solution provided in this application embodiment, by providing a first clearance groove and a second clearance groove at the ends of the first limiting member and the second limiting member, the possibility of the rear-mounted limiting member blocking the third through hole of the mounting sleeve is reduced, and the possibility of assembly interference between the first limiting member and the second limiting member and the external mounting pin is reduced, thereby improving the reliability of the battery device.

[0025] In some embodiments, the first clearance groove and the second clearance groove are disposed opposite to each other to jointly define the third through hole.

[0026] In the technical solution provided in this application embodiment, the third through hole is defined by the combination of the first clearance groove and the second clearance groove, so as to realize the physical support and limitation of the two limiting parts by the mounting pin, absorb the assembly tolerance, and use the mounting pin to share part of the expansion tension, thereby improving the reliability of the battery device.

[0027] In some embodiments, the third through hole includes a circular hole, and the first clearance groove and the second clearance groove are both semi-circular grooves, which together form a circular hole.

[0028] In the technical solution provided in this application embodiment, the clearance groove is designed as a semi-circular groove and assembled into a regular circular hole, so that the pin shaft and the end of the limiting member form a uniform surface contact force, reducing the possibility of local stress concentration and material yielding caused by sharp corner contact, thereby improving the reliability of the battery device.

[0029] In some embodiments, the connecting part and the body part have an integral structure.

[0030] In the technical solution provided in this application embodiment, the connecting part and the main body are integrally formed, which can reduce welding seams and weaken nodes, thereby reducing the risk of weld cracking, improving the overall structural strength and torsional stiffness of the mounting component, and thus improving the reliability of the battery device.

[0031] In some embodiments, it further includes: an insulating sleeve covering a first portion of the limiting member, wherein the projection of the first portion along a direction perpendicular to the first direction is outside the projection range of the connection portion.

[0032] In the technical solution provided in this application embodiment, by directly covering the straight first part exposed outside the connection part with an insulating sleeve, the part of the limiting member that penetrates into the connection part or cavity has been physically separated by the metal or insulating structure of the mounting member, reducing the need for additional insulation treatment, thereby simplifying the insulation protection process, improving the insulation protection performance and production process stability, and thus improving the reliability of the battery device.

[0033] In a second aspect, an electrical device is provided, comprising: a battery device as described in any of the first aspects, wherein the battery device is used to provide electrical energy.

[0034] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0035] Figure 1 A schematic diagram of a vehicle according to one embodiment of this application is shown; Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown; Figure 3A top view of a battery device provided in one embodiment of this application is shown; Figure 4 A perspective view showing the connection between the mounting component and the limiting component in a battery device according to a certain embodiment of this application is shown; Figure 5 This paper shows a top view of the connection between the mounting component and the limiting component in a battery device according to a certain embodiment of this application; Figure 6 This paper shows a front view of the connection between the mounting component and the limiting component in a battery device according to a certain embodiment of this application; Figure 7 This paper shows another possible top view connection diagram of the mounting member and the limiting member in a battery device provided in a certain embodiment of the present application; Figure 8 This paper shows a partial cross-sectional view of the connection between the mounting member and the limiting member in a battery device according to a certain embodiment of this application; Figure 9 A perspective view of a mounting component in a battery device according to a certain embodiment of this application is shown; Figure 10 This paper shows another possible partial cross-sectional view of the connection between the mounting member and the limiting member in a battery device according to a certain embodiment of the present application; Figure 11 A side view of a mounting component in a battery device according to a certain embodiment of this application is shown; Figure 12 This illustration shows another possible partial cross-sectional view connecting the mounting member and the limiting member in a battery device according to a certain embodiment of this application; Figure 13 A top view of the mounting component and limiting component in a battery device according to a certain embodiment of this application is shown; Figure 14 A top view of a limiting member in a battery device according to a certain embodiment of this application is shown; in the accompanying drawings, the drawings are not drawn to scale.

[0036] Figure label: 1-Vehicle; 10-Battery unit; 20-Battery cell; 30-Controller; 40-Motor; 11-Box; 111-First box section; 112-Second box section; 200-Mounting component; 210-Main body section; 220-Connecting part; 221-First extension; 222-Second extension; 230-Second through hole; 240-First component; 250-Second component; 260-Receiving groove; 270-Through cavity; 280-Third through hole; 300-Limiting member; 310-First limiting member; 320-Second limiting member; 330-First through hole; 340-Allowing hole; 311-First clearance groove; 321-Second clearance groove; 370-First part; 400-Fastener; 500-Insulating sleeve. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0039] In this application, the reference to "embodiment" means that a specific 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 in the specification does not necessarily imply that all embodiments are the same, nor are they independent or alternative embodiments mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0040] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are illustrative and should not constitute any limitation on this application.

[0043] In this application, "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).

[0044] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0045] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0046] In this embodiment of the application, the battery cell can be a secondary battery, which can be a battery cell that can be used again after the battery cell has been discharged by recharging to activate the active material.

[0047] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0048] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0050] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0051] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0052] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0053] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0054] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0055] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0056] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in special equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0057] Current battery devices often use mounting components to attach the battery device to an external structure. However, the mounting components isolate the upper space of the battery device, making it difficult to set up limiting components to restrain the expansion of individual battery cells. Setting up limiting components to avoid the mounting components would occupy additional space, and the connection strength of segmented limiting components is limited, thus affecting the reliability of the battery device.

[0058] Therefore, improving the reliability of battery devices has become an urgent problem to be solved.

[0059] In this embodiment, by integrally or fixedly extending a connecting portion into the body of the mounting member, the limiting member extends directly along the first direction and overlaps and is fixedly connected to the connecting portion. This structure allows the mounting structure to provide a force-bearing point for the limiting member, reducing the number of limiting members required. Simultaneously, the expansion tension generated by the battery cell is directly transmitted from the limiting member to the connecting portion of the mounting member, with the mounting member and the limiting member sharing the tensile load. This alleviates stress concentration and improves the overall load-bearing capacity of the expansion constraint structure.

[0060] This application provides a battery device including multiple battery cells, a mounting member, and a limiting member. The multiple battery cells are arranged along a first direction. The mounting member is used to mount the battery device to a structure and is located on one side of the multiple battery cells along the first direction. The mounting member includes a body portion and a connecting portion, which is fixedly connected to the body portion and protrudes from the body portion along the first direction. The limiting member is located on one side of the multiple battery cells along a second direction and extends along the first direction. The limiting member is used to constrain the expansion of the multiple battery cells along the first direction, and the second direction is perpendicular to the first direction. The limiting member is at least partially stacked with and fixedly connected to the connecting portion.

[0061] In the technical solution provided in this application embodiment, by setting a connecting part protruding from the main body on the mounting component, and making the limiting member at least partially overlapped with the connecting part and fixedly connected, the space occupied by the structure can be reduced and the force transmission path can be optimized, thereby improving the reliability of the limiting member in constraining the expansion of the battery cell, and thus improving the reliability of the battery device.

[0062] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0063] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0064] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0065] For example, such as Figure 1This illustration shows a structural diagram of a vehicle 1 according to one embodiment of this application. Vehicle 1 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 electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, it can serve as the operating power source for vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0066] For example, Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The prism shape shown, or it could be different. Figure 2 Other shapes are shown in the embodiments of this application, but the embodiments are not limited thereto.

[0067] It should be understood that, such as Figure 2 As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 20. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 20 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 20 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 2As shown, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0068] For example, unlike Figure 2 As shown, one of the first housing portion 111 and the second housing portion 112 may be a hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with an opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0069] The following is combined Figures 3 to 6 This application describes a battery device 10 provided in one embodiment.

[0070] Figure 3 A top view of a battery device 10 provided in one embodiment of this application is shown; Figure 4 A perspective view showing the connection between the mounting member 200 and the limiting member 300 in a battery device 10 according to a certain embodiment of this application is shown. Figure 5 This paper shows a top view connecting the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application; Figure 6 The diagram shows a front view of the connection between the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application.

[0071] This application provides a battery device 10, including a plurality of battery cells 20, a mounting member 200, and a limiting member 300. The plurality of battery cells 20 are arranged along a first direction. The mounting member 200 is used to mount the battery device 10 to an external structure. The mounting member 200 is disposed on one side of the plurality of battery cells 20 along the first direction, and includes a body portion 210 and a connecting portion 220. The connecting portion 220 is fixedly connected to the body portion 210 and protrudes from the body portion 210 along the first direction. The limiting member 300 is disposed on one side of the plurality of battery cells 20 along a second direction and extends along the first direction. The limiting member 300 is used to constrain the expansion of the plurality of battery cells 20 along the first direction, and the second direction is perpendicular to the first direction. The limiting member 300 is at least partially stacked with and fixedly connected to the connecting portion 220.

[0072] The external structure can be the structure of an electrical device, such as the chassis or beam structure of vehicle 1, etc., and this application embodiment does not limit it.

[0073] The first direction can be the arrangement direction of multiple battery cells 20, or it can be the main direction of the expansion force generated by the battery cells 20 during charging and discharging.

[0074] The mounting member 200 can be a structural support member used to install and fix the entire battery device 10 to the electrical device. The body portion 210 can be the main structural part of the mounting member 200, used to achieve physical suspension and locking with the electrical device. The connecting portion 220 can be a structural segment that protrudes outward from the body portion 210 along a first direction.

[0075] The limiting member 300 can be a strip or bar-shaped constraint member, such as a steel strip or metal strip, which can have high tensile strength and yield strength.

[0076] The stacked arrangement can be such that at least a portion of the surface of the limiting member 300 overlaps and fits with the positioning surface of the connecting part 220 in the thickness direction.

[0077] To address the issue of large expansion forces in individual battery cells during charge-discharge cycles in the battery device 10, and the need for a central mounting structure to disrupt the traditional continuous steel strip arrangement, this embodiment of the application incorporates a connecting portion 220 integrally or fixedly extended from the body portion 210 of the mounting member 200. This allows the limiting member 300 to extend directly along a first direction and overlap and fix to the connecting portion 220. This structure provides a stress point for the limiting member 300 within the mounting structure, reducing the number of limiting members 300 required. Simultaneously, the expansion tension generated by the individual battery cells is directly transmitted from the limiting member 300 to the connecting portion 220 of the mounting member 200, with the mounting member 200 and the limiting member 300 sharing the tensile load. This alleviates stress concentration issues and enhances the overall load-bearing capacity of the expansion constraint structure.

[0078] In the technical solution provided in this application embodiment, by providing a connecting portion 220 protruding from the main body portion 210 on the mounting member 200, and making the limiting member 300 at least partially stacked and fixedly connected with the connecting portion 220, the structural space occupied can be reduced and the force transmission path optimized, thereby improving the reliability of the limiting member 300 in constraining the expansion of the battery cell 20, thereby improving the reliability of the battery device 10.

[0079] In some embodiments, the limiting member 300 has a first through hole 330 extending along its own thickness direction, and the connecting portion 220 has a second through hole 230 extending along the thickness direction of the limiting member 300. The battery device 10 also includes a fastener 400, which passes through the first through hole 330 and the second through hole 230 to fix the limiting member 300 and the connecting portion 220.

[0080] In the above embodiments, the first through hole 330 may be a through hole formed in the overlapping area of ​​the limiting member 300. The second through hole 230 may be a through hole formed on the connecting portion 220 and aligned with the axis of the first through hole 330.

[0081] Fastener 400 can be a connecting element used for mechanical locking, including bolts, pins, screws or rivets.

[0082] In this embodiment, corresponding first through holes 330 and second through holes 230 are respectively formed on the limiting member 300 and the connecting part 220, and fasteners 400 are used to lock them in place. This mechanical connection method differs from the heat input and residual thermal stress in the thermal welding process, maintaining a high degree of flatness on the mating surfaces of the limiting member 300 and the connecting part 220, reducing assembly difficulty on the production line. Furthermore, after the fasteners 400 pass through the first through holes 330 and the second through holes 230, they primarily bear shear loads, and their shear strength is higher than the tensile strength of traditional welds, further improving the mechanical stability of the connection node.

[0083] In the technical solution provided in this application embodiment, the limiting member 300 and the connecting part 220 are mechanically fixed by the cooperation of the first through hole 330, the second through hole 230 and the fastener 400, thereby alleviating the risk of structural deformation and fatigue failure caused by the hot welding process, thereby improving the stability of assembly flatness and connection strength, and thus improving the reliability of the battery device 10.

[0084] Figure 7 This paper shows another possible top view connection diagram of the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application.

[0085] In some embodiments, the limiting member 300 is provided with a plurality of first through holes 330 extending along its own thickness direction, and the connecting portion 220 is provided with a plurality of second through holes 230 extending along the thickness direction of the limiting member 300. The plurality of first through holes 330 and the plurality of second through holes 230 are correspondingly arranged.

[0086] In the above embodiments, the plurality of first through holes 330 and the plurality of second through holes 230 may be two or more through hole arrays arranged in a plane along or perpendicular to the first direction within the overlapping area of ​​the limiting member 300 and the connecting portion 220.

[0087] When the expansion force of the battery cell 20 is large, if it is connected by a single fastener 400, the single fastener 400 and the edge of the hole wall will be subjected to excessive shear stress. In this embodiment, multiple first through holes 330 and multiple second through holes 230 are arranged to form an array of fasteners 400 for locking. When the limiting member 300 transmits the expansion tension, the tensile load is evenly distributed to each fastener 400 and the corresponding hole wall stress surface, reducing the peak shear stress at a single hole position and reducing the possibility of hole wall extrusion deformation or fastener 400 shearing due to local stress overload.

[0088] In the technical solution provided in this application embodiment, the load is distributed and transferred at multiple points by the corresponding cooperation of multiple sets of first through holes 330 and second through holes 230, reducing the local stress concentration of a single fastening node, enhancing the load-bearing capacity and fatigue resistance of the connection structure, thereby improving the reliability of the battery device 10.

[0089] Figure 8 This paper shows a partial cross-sectional view of the connection between the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application.

[0090] In some embodiments, the mounting member 200 includes a first member 240 and a second member 250 disposed along a second direction, the first member 240 and the second member 250 being separated at a connecting portion 220. A fastener 400 passes through the first through hole 330 and the second through hole 230 to secure the first member 240 and the second member 250.

[0091] The first component 240 and the second component 250 can be an upper half and a lower half formed by splitting the mounting component 200 along the second direction. The split at the connecting part 220 can be such that the parting contact surfaces of the first component 240 and the second component 250 pass through the connecting part 220.

[0092] In confined spaces, it is difficult to fit the limiting member 300 into the integral mounting component. In this embodiment, the mounting component 200 is designed as a first component 240 and a second component 250 split along a second direction. During assembly, the limiting member 300 can be placed between the first component 240 and the second component 250, with the fastener 400 passing through the hole in the first component 240, the first through hole 330 in the limiting member 300, and the hole in the second component 250. This design allows the same fastener 400 to simultaneously fix the limiting member 300 and complete the engagement of the first component 240 and the second component 250, achieving multiple uses with a single fastener, reducing the number of parts, and lowering assembly complexity.

[0093] In the technical solution provided in this application embodiment, by dividing the mounting component 200 into a first component 240 and a second component 250 along the second direction, and using the through fastener 400 to simultaneously realize the combination of the components and the fixation of the limiting component 300, the structural assembly process is simplified and the space utilization and assembly convenience are improved.

[0094] In some embodiments, a receiving groove 260 or a through cavity 270 is formed at the mating point of the first member 240 and the second member 250. A portion of the limiting member 300 is disposed within the receiving groove 260 or the through cavity 270.

[0095] In the above embodiments, the receiving groove 260 or the through cavity 270 can be an inner groove or through channel reserved at the mating surface of the first component 240 and the second component 250, and its cross-sectional profile is complementary to the cross-sectional shape of the limiting member 300.

[0096] In this embodiment, the overlapping connection end of the limiting member 300 is placed inside the receiving groove 260 or through cavity 270 formed by the mating of the first component 240 and the second component 250. After mating, the first component 240 and the second component 250 physically clamp and cover the limiting member 300 from the top, bottom and sides, thereby reducing lateral warping or flipping of the limiting member 300 during tension, further saving lateral space and reducing the risk of interference between the limiting member 300 and surrounding electrical components.

[0097] In the technical solution provided in this application embodiment, the limiting member 300 is covered by the receiving groove 260 or the through cavity 270 formed by the engagement of the first component 240 and the second component 250, which provides good geometric constraints and protection for the limiting member 300, reduces the possibility of the limiting member 300 slipping under force and interfering with other electrical components in space, and can improve the compactness of the overall structure, thereby improving the reliability of the battery device 10.

[0098] Combination Figure 9 and Figure 10 , Figure 9 A perspective view of the mounting component 200 in a battery device 10 according to a certain embodiment of this application is shown; Figure 10 This paper shows another possible partial cross-sectional view of the connection between the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application.

[0099] In some embodiments, the connecting portion 220 has a receiving groove 260 on its end face away from the main body portion 210 along a first direction, and the end of the limiting member 300 is received in the receiving groove 260 and fixedly connected to the connecting portion 220.

[0100] The end face of the connecting portion 220 that is away from the main body portion 210 along the first direction can be the end face of the connecting portion 220 that faces outward along the first direction. The receiving groove 260 can be a groove formed on the end face and recessed into the connecting portion 220.

[0101] By creating a receiving groove 260 on the end face of the connecting portion 220, the end of the limiting member 300 can be inserted into the receiving groove 260 along the first direction. The upper, lower, and left and right walls of the receiving groove 260 serve to align and guide the end of the first limiting member 310, absorbing manufacturing and assembly tolerances. When the first limiting member 310 is subjected to tensile load, the inner wall of the receiving groove 260 can assist in bearing lateral shear force and bending moment, making the stress transition smoother and improving the stress distribution at the connecting portion 220.

[0102] In the technical solution provided in this application embodiment, the end of the limiting member 300 is inserted and accommodated by the receiving groove 260 on the end face of the connecting part 220, forming a good alignment guidance and lateral limiting, which can absorb assembly and manufacturing tolerances, improve the force transmission state, and thereby improve the reliability of the battery device 10.

[0103] Figure 11 A side view of the mounting member 200 in a battery device 10 according to a certain embodiment of this application is shown; Figure 12 This shows another possible partial cross-sectional view of the connection between the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application; Figure 13 A top view of the mounting member 200 and the limiting member 300 in a battery device 10 provided in a certain embodiment of this application is shown.

[0104] In some embodiments, the mounting member 200 is provided with a through cavity 270, which extends through the mounting member 200 from the connecting portion 220 along a first direction. A limiting member 300 passes through the through cavity 270 and is fixedly connected to the connecting portion 220.

[0105] The through cavity 270 can be an internal channel that continuously penetrates the main body 210 and the connecting portions 220 on both sides of the mounting member 200 along the first direction. The first extension 221 and the second extension 222 can be extension structures of the connecting portion 220 located on both sides of the main body 210 in the first direction.

[0106] In this embodiment, the limiting member 300 may include an integral flat steel strip.

[0107] The segmented limiting member 300 has many connection nodes, and its overall tensile stiffness is limited by the strength of the connection points. A through cavity 270 extending through the mounting member 200 in the first direction is adopted, allowing a continuous limiting member 300 to pass directly through the mounting member 200. The limiting member 300 maintains the integrity of the base material in the first direction, reducing the possibility of intermediate tensile fracture. Simultaneously, after passing through the through cavity 270, the limiting member 300 is laterally locked to the first extension 221 or the second extension 222 by fasteners 400, achieving positioning and collaborative load-bearing of the integrated limiting member 300 by the mounting member 200.

[0108] In the technical solution provided in this application embodiment, the integrated limiting member 300 is accommodated by a through cavity 270 that penetrates the mounting member 200 along the first direction, thus preserving the structural continuity and mechanical bearing capacity of the limiting member 300 body, reducing the number of connection nodes, and improving the resistance to expansion and tension. This improves the reliability of the battery device 10.

[0109] In some embodiments, the mounting member 200 includes a mounting sleeve, the mounting sleeve including a third through hole 280 extending along a second direction, and the limiting member 300 is provided with a clearance hole 340 corresponding to the position of the third through hole 280.

[0110] The mounting sleeve can be a tubular or cylindrical mounting component used to accommodate the mounting pin.

[0111] The third through hole 280 can be a mounting hole that penetrates the body of the mounting sleeve along the second direction, for the mounting pin of the electrical device to pass through. The clearance hole 340 can be a through hole formed on the through-type limiting member 300 and coaxially aligned with the third through hole 280 in the second direction.

[0112] When the mounting component 200 includes the mounting sleeve, the pin for mounting the electrical device passes through the third through hole 280 along the second direction. Since the limiting member 300 is directly inserted into the through cavity 270 inside the mounting sleeve, and a clearance hole 340 is provided at the corresponding position of the limiting member 300, the mounting pin of the electrical device can smoothly pass through the third through hole 280 and the clearance hole 340 without affecting the suspension and fixation of the electrical device; at the same time, the outer wall of the pin cooperates with the wall of the clearance hole 340, which can serve as a stop pin for the limiting member 300 along the first direction, further enhancing the tensile limiting effect of the limiting member 300 in the first direction.

[0113] In the technical solution provided in this application embodiment, the third through hole 280 of the mounting sleeve and the clearance hole 340 on the limiting member 300 are mutually connected and cooperate, so that the external mounting pin can be smoothly locked. At the same time, the pin is used to achieve the lateral stop of the limiting member 300, which can simultaneously realize the mounting function and the anti-expansion limiting requirement, thereby improving the reliability of the battery device 10.

[0114] Figure 14 A top view of the limiting member 300 in a battery device 10 provided in a certain embodiment of this application is shown.

[0115] In some embodiments, the mounting member 200 is provided with a through cavity 270 extending along a first direction, the through cavity 270 penetrating the mounting member 200 from the connecting portion 220. The connecting portion 220 includes a first extension 221 and a second extension 222, the first extension 221 and the second extension 222 being respectively disposed on both sides of the body portion 210 along the first direction. The limiting member 300 includes a first limiting member 310 and a second limiting member 320, wherein the first limiting member 310 passes through the opening of the through cavity 270 located in the first extension 221 and is fixedly connected to the first extension 221, and the second limiting member 320 passes through the opening of the through cavity 270 located in the second extension 222 and is fixedly connected to the second extension 222.

[0116] The first limiting member 310 and the second limiting member 320 can be two separate, straight metal strips.

[0117] The first extension 221 and the second extension 222 are cantilever sections extending along the first direction on both sides of the main body 210.

[0118] The through cavity 270 has openings on the outer end faces of both the first extension 221 and the second extension 222.

[0119] The one-piece long steel strip is prone to bending and deformation during transportation. This embodiment employs a two-section, post-assembly docking structure. During assembly, the first limiting member 310 and the second limiting member 320 are inserted into the cavity from opposite ends of the first extension 221 and the second extension 222, respectively, and are fixed to the first extension 221 and the second extension 222. This post-assembly docking method allows the limiting member 300 and the mounting member 200 to be supplied and packaged separately, thereby reducing transportation and storage costs, and shortening the on-site assembly route and simplifying the operation.

[0120] In the technical solution provided in this application embodiment, the first limiting member 310 and the second limiting member 320 are inserted into the openings on both sides of the through cavity 270 and fixedly connected to each other, realizing a rear-mounted split assembly, reducing the transportation and manufacturing costs of parts, and improving the convenience of on-site assembly of the battery device 10. This can improve the reliability of the battery device 10.

[0121] In some embodiments, the mounting member 200 includes a mounting sleeve, which includes a third through hole 280 extending along a second direction. A first clearance groove 311 is provided at the end of the first limiting member 310 located within the through cavity 270, and a second clearance groove 321 is provided at the end of the second limiting member 320 located within the through cavity 270. Both the first clearance groove 311 and the second clearance groove 321 are arranged around the third through hole 280.

[0122] The first clearance groove 311 may be a notch formed in the first limiting member 310 at the inner end of the through cavity 270. The second clearance groove 321 may be a notch formed in the second limiting member 320 at the inner end of the through cavity 270.

[0123] The groove wall contours of the first clearance groove 311 and the second clearance groove 321 are adapted to the inner wall cross section of the third through hole 280.

[0124] The openings of the first clearance groove 311 and the second clearance groove 321 can face a third direction, which can be perpendicular to the first and second directions.

[0125] The first clearance groove 311 and the second clearance groove 321 can be arc-shaped grooves, and the curvature can be, for example, a quarter circle, a semi circle, a three-quarter circle, etc.

[0126] In the two-stage rear-mounted structure, after the first limiting member 310 and the second limiting member 320 penetrate into the cavity 270, their ends approach the third through hole 280 in the center of the mounting sleeve. By providing the first clearance groove 311 and the second clearance groove 321, the spatial obstruction caused by the first limiting member 310 and the second limiting member 320 to the third through hole 280 is reduced, improving the smoothness of the electrical device mounting pin when it passes through in the second direction and reducing the risk of assembly interference.

[0127] In the technical solution provided in this application embodiment, by providing a first clearance groove 311 and a second clearance groove 321 at the ends of the first limiting member 310 and the second limiting member 320, the possibility of the rear-mounted limiting member 300 blocking the third through hole 280 of the mounting sleeve is reduced, and the possibility of assembly interference between the first limiting member 310 and the second limiting member 320 and the external mounting pin is reduced, thereby improving the reliability of the battery device 10.

[0128] In some embodiments, the first clearance groove 311 and the second clearance groove 321 are disposed opposite to each other to jointly define the third through hole 280.

[0129] The first clearance groove 311 and the second clearance groove 321 together define the third through hole 280. This can be understood as follows: when the first limiting member 310 and the second limiting member 320 are respectively inserted to a predetermined depth, the inner wall of the first clearance groove 311 and the inner wall of the second clearance groove 321 are spatially opposite to each other, jointly enclosing a through area that is consistent with the edge contour of the third through hole 280.

[0130] When the first clearance groove 311 and the second clearance groove 321 are joined to define the third through hole 280, the mounting pin of the electrical device passes through the space formed by the first clearance groove 311 and the second clearance groove 321 as it enters the third through hole 280. The outer circumferential surface of the pin can simultaneously abut against the groove walls of the first clearance groove 311 and the second clearance groove 321. When the battery cell expands and generates tension, the first limiting member 310 and the second limiting member 320 directly apply part of the tension to the pin through the groove walls, and the pin cooperates in bearing the tension, further sharing the force on the fastener 400 of the connecting part 220.

[0131] In the technical solution provided in this application embodiment, the third through hole 280 is defined by the combination of the first clearance groove 311 and the second clearance groove 321, so as to realize the physical support and limitation of the two limiting parts 300 by the mounting pin, absorb assembly tolerance, and use the mounting pin to share part of the expansion tension, thereby improving the reliability of the battery device 10.

[0132] In some embodiments, the third through hole 280 includes a circular hole, and the first relief groove 311 and the second relief groove 321 are both semi-circular grooves, with the first relief groove 311 and the second relief groove 321 surrounding the circular hole.

[0133] In the above embodiment, the semicircular groove can be a semicircular cut with a radius equal to that of the third through hole 280. After the two semicircular grooves are joined together, a regular circular hole with a central angle of 360 degrees is formed.

[0134] Since the mounting pins of electrical devices are typically regular cylinders, the first clearance groove 311 and the second clearance groove 321 are made into semi-circular grooves. When they are joined together, they form a circular hole, allowing the outer circumference of the pin to achieve a full-radius surface contact fit with the ends of the first limiting member 310 and the second limiting member 320. Under stress, the pressure distribution on the contact surface is uniform, reducing the possibility of local stress concentration and material yielding caused by sharp corner contact, and improving the durability of the load-bearing structure.

[0135] In the technical solution provided in this application embodiment, the clearance groove is designed as a semi-circular groove and assembled into a regular circular hole, so that the pin shaft and the end of the limiting member 300 form a uniform surface contact force, reducing the possibility of local stress concentration and material yielding caused by sharp corner contact, thereby improving the reliability of the battery device 10.

[0136] In some embodiments, the connecting portion 220 and the body portion 210 have an integral structure.

[0137] In the above embodiments, the integral structure of the connecting part 220 and the body part 210 can be understood as the connecting part 220 and the body part 210 being formed in one piece using the same material through casting, forging, die forging, or integral machining processes, with no separation boundary or weld seam between them. The continuity of the material and the absence of internal defects can be detected by ultrasonic non-destructive testing or metallographic analysis.

[0138] Traditional mounting components and clearance structures are often welded separately, which alters the metallographic structure of the material in the weld area, reduces mechanical properties, and makes them prone to welding defects. In this embodiment, the connecting part 220 and the main body 210 are made into an integral structure, improving the continuity and uniformity of the material's mechanical properties. This allows the connecting part 220 to withstand higher bending and tensile loads, reducing the risk of weld cracking.

[0139] In the technical solution provided in this application embodiment, the connecting part 220 and the main body part 210 are integrally formed, which can reduce welding seams and weaken nodes, thereby reducing the risk of weld cracking, improving the overall structural strength and torsional stiffness of the mounting component 200, and thus improving the reliability of the battery device 10.

[0140] In some embodiments, it further includes: an insulating sleeve 500, the insulating sleeve 500 covering the first portion 370 of the limiting member 300, wherein, when projected along a direction perpendicular to the first direction, the projection of the first portion 370 is outside the projection range of the connecting portion 220.

[0141] The insulating sleeve 500 may be a tubular sleeve with open ends made of a polymer insulating material, such as polyethylene or polyvinyl fluoride heat shrink sleeve.

[0142] The first part 370 may be a straight section of the limiting member 300 that is not inside the connection part 220 or the cavity, exposed to the outside and close to the battery cell 20 or the high-voltage electrical connector. The withstand voltage breakdown performance of the insulating sleeve 500 can be tested by a withstand voltage tester.

[0143] The end of the limiting member 300 has sharp edges, which are prone to uneven powder adhesion, leading to insulation breakdown. In this embodiment, the exposed portion (first portion 370) of the limiting member 300 is kept as a regular and straight structure, and the end is stacked with the connecting portion 220 to cover the sharp edges. The straight structure allows for direct application of insulating heat shrink tubing, resulting in uniform insulation layer thickness and reducing the risk of sharp edge cracking. Furthermore, the portion of the limiting member 300 that extends into the connecting portion 220 or the cavity is physically separated by the metal or insulating structure of the mounting member 200, reducing the need for additional insulation treatment. This simplifies the insulation protection process and reduces the risk of insulation failure.

[0144] In the technical solution provided in this application embodiment, by directly covering the straight first part 370 exposed outside the range of the connecting part 220 with the insulating sleeve 500, and the part of the limiting member 300 that penetrates into the connecting part 220 or the cavity, the metal or insulating structure of the mounting member 200 has been physically separated, reducing the need for additional insulation treatment, thereby simplifying the insulation protection process, improving the insulation protection performance and the stability of the production process, and thus improving the reliability of the battery device 10.

[0145] In some embodiments, an electrical device includes a battery device 10 as described in any of the foregoing embodiments, wherein the battery device 10 is used to provide electrical energy.

[0146] In the above embodiments, the electrical device can be a terminal device equipped with a battery device 10 as a power source or energy storage source, including pure electric vehicles, plug-in hybrid electric vehicles, electric ships, energy storage power stations, or rail transit vehicles, etc.

[0147] Electrical devices face harsh vibration conditions and alternating temperature environments during operation or travel. The combined effects of battery cell expansion during charging and discharging and mechanical vibration can easily lead to loosening of the internal structure. The electrical device in this embodiment incorporates the aforementioned battery unit 10. The mounting member 200 provides high-rigidity suspension support in the middle of the battery unit 10. Simultaneously, the tight cooperation between the connecting part 220 and the straight limiting member 300 forms a stable battery cell expansion constraint system. This not only suppresses battery cell expansion deformation but also reduces space occupation, thereby improving the overall structural and operational reliability of the electrical device.

[0148] Finally, it should be noted that the above embodiments are used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. 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: Multiple battery cells (20) are arranged along a first direction; The mounting member (200) is used to mount the battery device to an external structure and is disposed on one side of the plurality of battery cells (20) along the first direction. The mounting member (200) includes a body part (210) and a connecting part (220). The connecting part (220) is fixedly connected to the body part (210) and protrudes from the body part (210) along the first direction. A limiting member (300) is disposed on one side of the plurality of battery cells (20) along the second direction and extends along the first direction. The limiting member (300) is used to constrain the expansion of the plurality of battery cells (20) along the first direction. The second direction is perpendicular to the first direction. The limiting member (300) is at least partially stacked with the connecting part (220) and fixedly connected to the connecting part (220).

2. The battery device according to claim 1, characterized in that, The limiting member (300) is provided with a first through hole (330) extending along its own thickness direction, and the connecting part (220) is provided with a second through hole (230) extending along the thickness direction of the limiting member (300). The battery device also includes: Fastener (400) is provided through the first through hole (330) and the second through hole (230) to fix the limiting member (300) and the connecting part (220).

3. The battery device according to claim 2, characterized in that, The limiting member (300) is provided with a plurality of first through holes (330) extending along its own thickness direction, and the connecting part (220) is provided with a plurality of second through holes (230) extending along the thickness direction of the limiting member (300). Multiple first through holes (330) are provided corresponding to multiple second through holes (230).

4. The battery device according to claim 2, characterized in that, The mounting component (200) includes a first component (240) and a second component (250) disposed along the second direction, the first component (240) and the second component (250) being separated at the connecting portion (220); The fastener (400) is inserted through the first through hole (330) and the second through hole (230) to fix the first component (240) and the second component (250).

5. The battery device according to claim 4, characterized in that, The first component (240) and the second component (250) form a receiving groove (260) or a through cavity (270) at their mating point. The limiting member (300) is partially disposed within the receiving groove (260) or the through cavity (270).

6. The battery device according to claim 1, characterized in that, The connecting part (220) has a receiving groove (260) on the end face away from the main body part (210) along the first direction. The end of the limiting member (300) is accommodated in the receiving groove (260) and fixedly connected to the connecting part (220).

7. The battery device according to claim 1, characterized in that, The mounting component (200) is provided with a through cavity (270), which extends through the mounting component (200) from the connecting part (220) along the first direction. The limiting member (300) passes through the through cavity (270) and is fixedly connected to the connecting part (220).

8. The battery device according to claim 7, characterized in that, The mounting component (200) includes a mounting sleeve, the mounting sleeve includes a third through hole (280) extending along a second direction, and the limiting member (300) is provided with a clearance hole (340) corresponding to the position of the third through hole (280).

9. The battery device according to claim 1, characterized in that, The mounting component (200) is provided with a through cavity (270) extending along the first direction, and the through cavity (270) extends through the mounting component (200) from the connecting part (220). The connecting portion (220) includes a first extension portion (221) and a second extension portion (222), wherein the first extension portion (221) and the second extension portion (222) are respectively disposed on both sides of the main body portion (210) along the first direction; The limiting member (300) includes a first limiting member (310) and a second limiting member (320), wherein the first limiting member (310) passes through the opening of the through cavity (270) located in the first extension (221) and is fixedly connected to the first extension (221), and the second limiting member (320) passes through the opening of the through cavity (270) located in the second extension (222) and is fixedly connected to the second extension (222).

10. The battery device according to claim 9, characterized in that, The mounting component (200) includes a mounting sleeve, the mounting sleeve including a third through hole (280) extending along a second direction. The end of the first limiting member (310) located in the through cavity (270) is provided with a first clearance groove (311), and the end of the second limiting member (320) located in the through cavity (270) is provided with a second clearance groove (321). The first clearance groove (311) and the second clearance groove (321) are both arranged around the third through hole (280).

11. The battery device according to claim 10, characterized in that, The first clearance groove (311) and the second clearance groove (321) are arranged opposite to each other to define the third through hole (280).

12. The battery device according to claim 11, characterized in that, The third through hole (280) includes a circular hole, and the first clearance groove (311) and the second clearance groove (321) are both semi-circular grooves, which together form a circular hole.

13. The battery device according to claim 1, characterized in that, The connecting part (220) and the main body part (210) have an integral structure.

14. The battery device according to any one of claims 1 to 13, characterized in that, Also includes: An insulating sleeve (500) covers a first portion (370) of the limiting member (300), wherein, when projected along a direction perpendicular to the first direction, the projection of the first portion (370) is outside the projection range of the connecting portion (220).

15. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

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