Battery device and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The single battery is accommodated in the box body, the single battery comprises a shell and a first magnetic part, and the first magnetic part is connected to the shell; the magnetic attraction structure is connected to the box body, and the magnetic attraction structure is connected with the first magnetic part in a magnetic attraction and adaptive mode; according to the battery device provided by the embodiment of the invention, the magnetic parts are arranged on the battery monomers, and the magnetic attraction structures are arranged on the box body, so that the battery monomers are fixed in the box body through the magnetic attraction structures, the disassembly difficulty of the battery monomers is reduced, and the single battery monomers in the battery device are convenient to disassemble and assemble; therefore, the difficulty of maintaining and replacing the single battery in the battery device is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the current battery device, the battery monomer is usually fixed to the bottom plate or side plate of the box by adhesion or the like. The battery monomer is difficult to disassemble. In the case that a certain battery monomer fails or is invalid, it is difficult to repair and replace the single battery monomer. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the application provides a battery device and a power utilization device, which can alleviate the problem of difficult maintenance caused by the difficulty of disassembling the battery monomer.

[0005] In the first aspect, the application provides a battery device, comprising:

[0006] a box, a battery monomer contained in the box, the battery monomer comprising a shell and a first magnetic member, the first magnetic member connected to the shell, a magnetic attraction structure connected to the box, the magnetic attraction structure and the first magnetic member being magnetically attracted and adaptively connected.

[0007] In the technical solution of the embodiment, the magnetic member is arranged on the battery monomer, and the magnetic attraction structure is arranged on the box, so as to fix the battery monomer in the box through the magnetic attraction structure, to reduce the difficulty of disassembling the battery monomer, facilitate disassembling and installing the single battery monomer in the battery device, and thus reduce the difficulty of repairing and replacing the single battery monomer in the battery device.

[0008] In some embodiments, the magnetic attraction structure comprises a base connected to the box; the magnetic attraction structure further comprises a second magnetic member arranged in the base, the second magnetic member and the first magnetic member being magnetically attracted and adaptively connected, so as to magnetically attract the first magnetic member to the base.

[0009] The technical solution of the embodiment provides specific structures of some magnetic attraction structures, the second magnetic member and the battery monomer are carried by the base, and the second magnetic member and the first magnetic member are magnetically attracted and adaptively connected, so as to fix the battery monomer on the base through the first magnetic member and the second magnetic member, thereby achieving the effect of fixing the battery monomer.

[0010] In some embodiments, the second magnetic member is a permanent magnet.

[0011] The second magnetic member is a permanent magnet, so that the second magnetic member can stably magnetically attract the first magnetic member, thereby improving the fixing stability of the magnetic attraction structure on the battery monomer, and reducing the cost.

[0012] In some embodiments, the base is provided with a cavity, and the second magnetic member is accommodated in the cavity and movably connected to the base, so as to change the magnetic attraction force of the second magnetic member on the first magnetic member.

[0013] In the technical scheme of the embodiment, the second magnetic member is movable relative to the base, so that the second magnetic member can change the magnetic attraction force on the first magnetic member, thereby facilitating the disassembly and installation of the battery monomer by the worker.

[0014] In some embodiments, the second magnetic member is rotatably connected to the base, the rotation axis of the second magnetic member is parallel to the first magnetic member, and the magnetic poles of the second magnetic member are arranged in a direction perpendicular to the rotation axis.

[0015] The technical scheme of the embodiment provides some movement modes of the second magnetic member, and the second magnetic member is rotatably connected to the base. By rotating the second magnetic member, the position of the second magnetic member towards the first magnetic member can be adjusted, and the magnetic attraction force of the second magnetic member on the first magnetic member can be adjusted, thereby facilitating the disassembly and installation of the battery monomer by the worker.

[0016] In some embodiments, the magnetic attraction structure further comprises a handle connected to the second magnetic member, and the handle is configured to drive the second magnetic member to rotate relative to the base.

[0017] The technical scheme of the embodiment provides some specific structures of the magnetic attraction structure, and the handle is connected to the second magnetic member, so that the worker can drive the second magnetic member to move through the handle, thereby facilitating the worker to adjust the magnetic attraction force of the second magnetic member on the first magnetic member.

[0018] In some embodiments, the battery device comprises a plurality of battery monomers arranged along a first direction; the base extends along the first direction; and the second magnetic member extends along the first direction and corresponds to the plurality of battery monomers arranged along the first direction, so as to magnetically attract the plurality of battery monomers arranged along the first direction to the base.

[0019] The technical scheme of the embodiment provides some specific structures of the base, and the base extends along the first direction, so that the second magnetic member can fix each battery monomer arranged along the first direction to the base, thereby simplifying the structure of the magnetic attraction structure and facilitating the control of the position or state of the second magnetic member.

[0020] In some embodiments, the box comprises a top structure and a bottom structure spaced apart from the top structure, a containing cavity is formed between the top structure and the bottom structure, and the battery monomer is contained in the containing cavity; and the base is arranged on the bottom structure.

[0021] In the technical scheme of the embodiment, the box comprises the top structure and the bottom structure, and the magnetic attraction structure is arranged on the bottom structure, so that the battery monomer is fixed on the bottom structure of the lower box through the magnetic attraction structure, and the magnetic attraction structure can not only fix the battery monomer on the box, but also reduce the interference of the magnetic attraction structure on the arrangement of the battery monomer and the occupation of the magnetic attraction structure on the internal space of the box.

[0022] In some embodiments, the bottom structure is provided with a heat conduction layer on the side facing the containing cavity, and the heat conduction layer is connected to the magnetic attraction structure.

[0023] In the technical scheme of the embodiment, the heat conduction layer is arranged and connected to the magnetic attraction structure, and part of the heat of the battery monomer is transmitted to the bottom structure through the first magnetic member, the base, the second magnetic member, and the heat conduction layer, so as to better transmit the heat of the battery monomer and realize heat exchange, thereby facilitating better control of the temperature of the battery monomer.

[0024] In some embodiments, a cavity is formed in the base and faces the opening and the bottom structure, and the second magnetic member is contained in the cavity; the second magnetic member is in a cylindrical structure and has an axis parallel to the bottom structure, one side of the second magnetic member abuts against the base, and the other side of the second magnetic member abuts against the heat conduction layer.

[0025] The technical scheme of the embodiment provides a specific structural relationship of some second magnetic members and heat conduction layers, so that one end of the second magnetic member abuts against the base and the other end abuts against the heat conduction layer; at this time, the second magnetic member can be used not only to fix the battery monomer but also to transmit the heat of the battery monomer, thereby facilitating heat exchange between the battery monomer and other structures.

[0026] In some embodiments, the bottom structure comprises a plate body, and the plate body is provided with a heat conduction layer on the side facing the containing cavity; and the battery device further comprises a heat exchange assembly arranged on the side of the plate body away from the containing cavity.

[0027] In the technical scheme of the embodiment, the heat of the battery monomer can be transmitted to the heat exchange assembly through the first magnetic member, the base, the second magnetic member, the heat conduction layer, and the plate body, so as to facilitate heat exchange between the heat exchange assembly and the battery monomer, thereby enabling the heat exchange assembly to better control the temperature of the battery monomer.

[0028] In some embodiments, the bottom structure comprises a heat exchange assembly, and the heat conduction layer and the base are arranged on the side of the heat exchange assembly facing the containing cavity.

[0029] In the technical scheme of the embodiment, the heat exchange assembly is used as the bottom structure, the heat conduction layer is directly formed on the heat exchange assembly, and the base is directly connected to the heat exchange assembly. In this way, the heat of the battery monomer can be directly transferred to the heat exchange assembly through the first magnetic member, the base and the second magnetic member, the heat transfer path is simplified, and the heat exchange efficiency is improved.

[0030] In some embodiments, the battery device further comprises a partition structure arranged in the box, and the partition structure comprises a partition member movably arranged in the box, and the partition member is configured to be movable between the first magnetic member and the second magnetic member to hinder the second magnetic member from magnetically attracting the first magnetic member.

[0031] In the technical scheme of the embodiment, the movable partition member is arranged to hinder the second magnetic member from magnetically attracting the first magnetic member, so that the staff can easily remove and replace the battery monomer from the magnetic attraction structure. Meanwhile, the partition member can be withdrawn from between the second magnetic member and the first magnetic member, so that the second magnetic member can magnetically attract the first magnetic member, thereby facilitating the installation and fixation of the battery monomer.

[0032] In some embodiments, the partition member is a flexible member, and the partition structure further comprises a winding drum rotatably connected to the box, and the partition member is wound on the winding drum.

[0033] The technical scheme of the embodiment provides specific structures of some partition structures, and the partition member is wound on the winding drum to reduce the space occupation of the partition structure. Meanwhile, under this arrangement, the partition member can be moved between a plurality of second magnetic members and a plurality of corresponding first magnetic members to hinder the magnetic attraction structure from magnetically attracting a plurality of battery monomers, thereby facilitating the installation and replacement of a larger number of battery monomers.

[0034] In some embodiments, the partition member is a magnetic conductive structure.

[0035] The technical scheme of the embodiment provides structures of some partition members to enable the partition member to hinder the second magnetic member from magnetically attracting the first magnetic member.

[0036] In some embodiments, the battery device comprises a heat exchange assembly arranged in the accommodating cavity and connected to the box, the magnetic attraction structure is connected to the heat exchange assembly, and a heat conduction layer is arranged between the magnetic attraction structure and the heat exchange assembly.

[0037] In the technical scheme of the embodiment, the magnetic attraction structure is connected to the heat exchange assembly through the heat conduction layer, so that the side of the battery monomer connected to the magnetic attraction structure can also exchange heat with the heat exchange assembly, thereby reducing the negative impact of the magnetic attraction structure on the temperature control of the battery monomer.

[0038] In some embodiments, the side of the base facing the first magnetic member is provided with a heat conduction layer, and the heat conduction layer is connected to the first magnetic member.

[0039] In the technical scheme of the embodiment, the heat conduction layer is arranged between the first magnetic member and the base, so that the heat generated by the charging and discharging of the battery monomer can be better transmitted to the base, and the battery monomer can better exchange heat with the magnetic attraction structure.

[0040] In some embodiments, the first magnetic member is a magnet, and any magnetic pole of the first magnetic member faces the magnetic attraction structure.

[0041] In the technical scheme of the embodiment, the first magnetic member is a magnet, and the first magnetic member and the second magnetic member can be magnetically attracted and connected to each other, so that the battery monomer can be more stably fixed in the box,

[0042] In some embodiments, the first magnetic member is a ferromagnetic metal structure.

[0043] In the technical scheme of the embodiment, the first magnetic member is a ferromagnetic metal structure, so that the magnetic attraction structure can better magnetically attract the first magnetic member, and the battery monomer can be stably fixed in the box.

[0044] In some embodiments, the first magnetic member is a magnetic conductive structure.

[0045] In the technical scheme of the embodiment, the first magnetic member is a magnetic conductive structure, so that the magnetic field generated by the magnetic attraction structure can be concentrated by the first magnetic member, and the influence of the magnetic attraction structure on other structures inside or outside the battery device is reduced.

[0046] In some embodiments, the first magnetic member is a silicon steel structure or a ferro-nickel alloy structure.

[0047] The technical scheme of the embodiment provides specific materials of the first magnetic member, so that the first magnetic member can be magnetically attracted and fixed by the magnetic attraction structure, and the first magnetic member can also concentrate the magnetic field to reduce the influence of the magnetic attraction structure on other structures inside or outside the battery device.

[0048] In some embodiments, the battery monomer further comprises an insulating structure; the insulating structure is arranged between the shell and the first magnetic member, or the insulating structure is arranged on the side of the first magnetic member facing the magnetic attraction structure.

[0049] In the technical scheme of the embodiment, the insulating structure is arranged to reduce the risk of short circuit and other adverse conditions between the battery monomer and the magnetic attraction structure, and improve the safety performance and stability of the battery device.

[0050] In some embodiments, the battery device further comprises a limiting member connected to the box, the limiting member is located on at least one side of the magnetic attraction structure, and the height of the limiting member is greater than the height of the magnetic attraction structure.

[0051] The technical scheme of the embodiment is characterized in that the limiting piece is arranged beside the magnetic attraction structure to assist in limiting the displacement of the battery monomer relative to the magnetic attraction structure; meanwhile, the limiting piece can also play a guiding installation role to facilitate the alignment of the battery monomer and the magnetic attraction structure by the worker during the installation of the battery monomer.

[0052] In some embodiments, the shell comprises a first side and a second side located on the lateral side of the shell, the first side and the second side are alternately connected in a head-to-tail manner, the area of the first side is larger than the area of the second side; the limiting piece is opposite to the second side.

[0053] In the technical scheme of the embodiment, the limiting piece is opposite to the second side with a smaller area of the battery monomer, and the first side with a larger area of the battery monomer can abut against each other to limit the displacement, so that the limiting piece can play a limiting role and reduce the space occupied by the limiting piece; meanwhile, the breathing effect of the battery monomer at the larger first side is more obvious, and the limiting piece can also reduce the damage to the battery monomer.

[0054] In some embodiments, the battery device comprises a plurality of battery monomers arranged along a first direction and / or a second direction to form a battery monomer assembly, the first direction and the second direction are arranged at an included angle; the limiting piece is arranged on opposite sides of the battery monomer assembly.

[0055] In the technical scheme of the embodiment, the expansion beam is usually arranged in the arrangement direction of the first side in the box body to limit the displacement and expansion of the battery monomer, and the battery monomer assembly is usually arranged at intervals from the inner wall of the box body in the arrangement direction of the second side; therefore, in the arrangement direction of the second side of the battery monomer

[0056] In a second aspect, some embodiments of the present application also provide a power utilization device comprising the battery device provided by some embodiments of the first aspect, and the battery device is used for storing or providing electric energy.

[0057] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and to implement the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0058] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to limit the scope of the application in any way. Furthermore, the drawings are provided for purposes of illustration only and merely depict typical or example embodiments of the application. However, the application is not limited in its application to the details of construction and the arrangement of components in the drawings.

[0059] Figure 1Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0060] Figure 2 Exploded structural schematic diagram of a battery device provided for some embodiments of the present application;

[0061] Figure 3 Exploded structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0062] Figure 4 Schematic diagram of a battery device removing top structure provided for some embodiments of the present application;

[0063] Figure 5 Schematic diagram of a battery device removing top structure provided for some embodiments of the present application;

[0064] Figure 6 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 5 Schematic diagram of a cross section at line A-A in the above figure;

[0065] Figure 7 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 6 Schematic diagram of a local enlargement at B in the above figure;

[0066] Figure 8 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 6 Schematic diagram of a local enlargement at B in the above figure;

[0067] Figure 9 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 7 Schematic diagram of a local enlargement at C in the above figure; Figure 1 ;

[0068] Figure 10 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 7 Schematic diagram of a local enlargement at C in the above figure; Figure 2 ;

[0069] Figure 11 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 5 Schematic diagram of a cross section at line A-A in the above figure;

[0070] Figure 12 Schematic diagram of a battery device provided for some embodiments of the present application; Figure 11 Schematic diagram of a local enlargement at D in the above figure.

[0071] The meanings of the marks in the above figures are as follows:

[0072] 1000, vehicle;

[0073] 100, battery device;

[0074] 10, box body; 101, containing cavity; 11, first box body; 111, top structure; 12, second box body; 121, bottom structure; 1211, plate body; 1212, heat exchange assembly;

[0075] 20, battery cell; 21, shell; 211, end cover; 212, shell body; 22, electrode assembly; 23, electrode terminal; 24, first magnetic member; 25, insulation structure;

[0076] 30, magnetic attraction structure; 31, base; 311, cavity; 32, second magnetic member; 321, first magnetic pole; 322, second magnetic pole; 33, handle;

[0077] 40, heat conduction layer;

[0078] 50, limiting member;

[0079] 60, partition structure; 61, partition member; 62, winding drum;

[0080] 200, motor;

[0081] 300, controller;

[0082] X, length direction of the battery device; Y, width direction of the battery device; Z, height direction of the battery device. DETAILED DESCRIPTION

[0083] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0085] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0086] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0087] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects have an“or” relationship.

[0088] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0089] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0090] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0091] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0092] In the current battery device, the battery cells are usually fixed to the bottom plate or side plate of the box by means of adhesion, welding and the like. This results in that the battery cells are difficult to be individually detached from the box after the production of the battery device is completed. In the case that one or several battery cells fail or are invalid, the corresponding battery cells are difficult to be detached, resulting in that the corresponding battery cells are difficult to be maintained. If the failed battery cells cannot be comprehensively overhauled, the failure may spread and cause the risk of failure of the entire battery device, and even may cause the safety hazard of the battery device. Therefore, in the case that one or several battery cells fail or are invalid, the current battery device usually is scrapped, which greatly reduces the utilization rate of the battery device, increases the use cost of the battery device, and greatly reduces the service life of the battery device.

[0093] Based on the above considerations, in order to alleviate the problem that the battery cells are difficult to be detached and thus are difficult to be maintained, the battery device provided in the embodiments of the present application is provided with a first magnetic member on the shell of the battery cell, and a magnetic attraction structure is provided on the box, so as to be magnetically connected with the first magnetic member through the magnetic attraction structure, and thus the battery cell is fixed in the box through the magnetic attraction structure.

[0094] In such a battery device, the battery device is magnetically attracted in the box through the magnetic attraction structure. In the case that one battery cell needs to be detached, the battery cell can be taken down by a force greater than the magnetic attraction force, or can be taken down by reducing the magnetic attraction force provided by the magnetic attraction structure. Compared with the adhesion, welding and the like for fixing the battery cells, the setting reduces the difficulty of detaching the battery cells, facilitates the detachment and installation of the single battery cell in the battery device, and thus reduces the difficulty of maintaining and replacing the single battery cell in the battery device.

[0095] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using a battery as a power source or a variety of energy storage systems using a battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy and an electric plane toy and the like, and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft and the like.

[0096] The following embodiments take a power consumption device of a vehicle 1000 as an example for convenient description.

[0097] Reference Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, the controller 300 being used to control the battery to supply power to the motor 200, for example, for the power demand of the vehicle 1000 during starting, navigation, and driving.

[0098] In some embodiments of the present application, the battery can not only be used as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0099] Reference Figure 2 , Figure 2 A disassembled structural schematic diagram of a battery device 100 is provided for some embodiments of the present application.

[0100] The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0101] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0102] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0103] In some embodiments, the battery cell assembly can be a battery pack, which includes a box 10 and one or more battery cell assemblies, the battery cell assemblies being accommodated in the box 10.

[0104] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box 10 by fixing the battery module in the box 10.

[0105] As an example, the battery cell assembly can also be accommodated in the box 10 by directly fixing a plurality of battery cells 20 in the box 10.

[0106] As an example, the case 10 can include a first case 11 and a second case 12. The first case 11 and the second case 12 are fastened so that an enclosed space is formed inside the case 10 to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first case 11 can be a top cover or a bottom plate.

[0107] As an example, the case 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are connected with the frame, respectively, so that an enclosed space is formed inside the case 10 to accommodate the battery cell assembly.

[0108] In some embodiments, the case 10 can be part of the chassis structure of the vehicle 1000. For example, part of the case 10 can be at least part of the floor of the vehicle 1000, or part of the case 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0109] Reference Figure 3 , Figure 3 A schematic diagram of the exploded structure of the battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. As shown in the figure, the battery cell 20 includes a shell 21, an electrode assembly 22, and other functional components; the shell 21 includes a shell body 212 and an end cover 211.

[0110] The end cover 211 refers to a component that covers the opening of the shell body 212 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 211 can be adapted to the shape of the shell body 212 to fit the shell body 212. Alternatively, the end cover 211 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 211 is not easily deformed when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cover 211 can be provided with functional components such as electrode terminals 23. The electrode terminals 23 can be used to electrically connect with the electrode assembly 22 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 211 can also be provided with a pressure relief structure for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cover 211 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 211, which can be used to isolate the electrical connection components in the shell body 212 from the end cover 211 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0111] The shell body 212 is a component for cooperating with the end cover 211 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, electrolyte and other components. The shell body 212 and the end cover 211 can be independent components, and an opening can be provided on the shell body 212, and the end cover 211 is made to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 211 and the shell body 212 can also be integrated, specifically, the end cover 211 and the shell body 212 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the inside of the shell body 212, the end cover 211 is made to cover the shell body 212. The shell body 212 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell body 212 can be determined according to the specific shape and size of the electrode assembly 22. The material of the shell body 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application does not make special limitations.

[0112] The electrode assembly 22 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 22 can be contained in the shell 21. The electrode assembly 22 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting the main body of the electrode assembly 22, and a portion without active material constituting the tab of the positive electrode sheet and the negative electrode sheet, respectively. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab connects the electrode terminal 23 to form a current loop.

[0113] In a first aspect, with reference to Figures 3 to 6 The present application provides a battery device 100, which comprises a box body 10, a battery cell 20 and a magnetic attraction structure 30. The battery cell 20 is contained in the box body 10, and the battery cell 20 comprises a shell 21 and a first magnetic member 24 connected to the shell 21; the magnetic attraction structure 30 is connected to the box body 10, and the magnetic attraction structure 30 is magnetically attracted and connected to the first magnetic member 24.

[0114] In the figure, the direction of the X-axis is the length direction of the battery device 100 and the length direction of the box body 10; the direction of the Y-axis is the width direction of the battery device 100 and the width direction of the box body 10; the direction of the Z-axis is the height direction of the battery device 100 and the height direction of the box body 10.

[0115] The box 10 refers to a structure for providing a containing space for the battery monomer 20 in the battery device 100, and the box 10 can be prismatic, cylindrical or other shapes.

[0116] The battery monomer 20 refers to the smallest unit of the battery device 100, and one battery device 100 can include one or more battery monomers 20. The plurality of battery monomers 20 can be connected in series, in parallel or in mixed connection. The mixed connection refers to that the plurality of battery monomers 20 are connected in series and in parallel. The plurality of battery monomers 20 can be directly connected in series, in parallel or in mixed connection, and the whole of the plurality of battery monomers 20 is contained in the box 10.

[0117] The shell 21 refers to a structure for forming a ring inside the battery monomer 20, that is, the shell 21 has a containing space for containing the electrode assembly 22, electrolyte and other structures.

[0118] The first magnetic member 24 refers to a structure with magnetism in the battery monomer 20. The first magnetic member 24 can be a magnet or other structure with magnetism and capable of magnetically attracting other magnetic structures 30, such as a permanent magnet, an electromagnet, etc. The first magnetic member 24 can also be a structure with magnetism and capable of being attracted by a magnet, such as a ferrous structure, a nickel structure, etc.

[0119] The first magnetic member 24 can be a sheet structure, a block structure, a columnar structure or other shapes. The first magnetic member 24 can be a polygon, a circle or other regular shapes, or an irregular shape. One battery monomer 20 can include only one first magnetic member 24, or two or more first magnetic members 24.

[0120] The first magnetic member 24 is connected to the shell 21. The first magnetic member 24 can be connected to the side of the shell 21, or to the top or bottom of the shell 21. The first magnetic member 24 can completely cover the surface of the shell 21 to which it is connected, or only cover a part of the surface of the shell 21 to which it is connected. One side of the shell 21 can be provided with only one first magnetic member 24, or two or more first magnetic members 24.

[0121] For example, the first magnetic member 24 can be a sheet structure, and the first magnetic member 24 is arranged on the side of the shell 21 and completely covers the side. For example, the first magnetic member 24 can also be a bolt-shaped structure, and the first magnetic member 24 has a plurality of first magnetic members 24 arranged at the corners of the bottom surface of the shell 21.

[0122] The magnetic attraction structure 30 refers to a structure in the battery device 100 for magnetic attraction and adaptive connection with the first magnetic member 24. The magnetic attraction structure 30 can be magnetically attracted to the first magnetic member 24, thereby fixing the battery monomer 20 on the magnetic attraction structure 30. The magnetic attraction structure 30 is connected to the box body 10. The magnetic attraction structure 30 can be connected to the bottom surface of the box body 10 or the side surface or top surface of the box body 10 by welding, screwing or other methods. One magnetic attraction structure 30 can correspond to only one first magnetic member 24 of the battery monomer 20. One magnetic attraction structure 30 can also correspond to the first magnetic members 24 of two or more battery monomers 20.

[0123] According to the structure of the first magnetic member 24, the magnetic attraction structure 30 can include a structure with magnetic attraction capability, such as a permanent magnet or an electromagnet. The magnetic attraction structure 30 can also include a structure with magnetism and capable of being attracted by a magnet, such as an iron structure or a nickel structure. For example, when the first magnetic member 24 is a structure with magnetism and capable of being attracted by a magnet, the magnetic attraction structure 30 can include a magnet. For example, when the first magnetic member 24 is a magnet, the magnetic attraction structure 30 can include a magnet or a structure with magnetism and capable of being attracted by a magnet.

[0124] It can be understood that, since the first magnetic member 24 and the magnetic attraction structure 30 are magnetically attracted and adapted, when both the first magnetic member 24 and the magnetic attraction structure 30 include a magnet, the magnetic poles of the opposite ends of the first magnetic member 24 and the magnetic attraction structure 30 are different, so as to be magnetically attracted to each other.

[0125] When the magnetic attraction structure 30 corresponds to only one battery monomer 20, the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 can be greater than the weight of the battery monomer 20, so as to fix the battery monomer 20. The magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 can be set by selecting parameters such as material and volume. For example, the magnetic attraction force between the magnetic attraction structure 30 and the first magnetic member 24 can be twice the weight of the battery monomer 20.

[0126] When the magnetic attraction structure 30 corresponds to multiple battery monomers 20, the magnetic attraction force between the magnetic attraction structure 30 and each first magnetic member 24 of each battery monomer 20 can be greater than the sum of the weights of the battery monomers 20.

[0127] By adjusting the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30, the magnetic attraction structure 30 can not only relatively stably fix the battery monomer 20 in the box body 10, but also enable the worker to disassemble the battery monomer 20 from the box body 10. For example, the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 can be within a certain range, so as to fix the battery monomer 20 and facilitate disassembly by the worker.

[0128] The magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 can also be adjustable. When the battery monomer 20 needs to be fixed, the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 is large. When the battery monomer 20 needs to be disassembled, the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 is small. For example, at least one of the first magnetic member 24 and the magnetic attraction structure 30 can be an electromagnet to control the size of the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30 through voltage, current, and other parameters.

[0129] In this embodiment, the magnetic member is arranged on the battery monomer 20, and the magnetic attraction structure 30 is arranged on the box body 10 to fix the battery monomer 20 in the box body 10 through the magnetic attraction structure 30, thereby reducing the difficulty of disassembling the battery monomer 20 and facilitating the disassembly and installation of the single battery monomer 20 in the battery device 100, thereby reducing the difficulty of maintenance and replacement of the single battery monomer 20 in the battery device 100.

[0130] Reference Figures 4 to 7 In some embodiments, the magnetic attraction structure 30 includes a base 31 connected to the box body 10. The magnetic attraction structure 30 further includes a second magnetic member 32 arranged in the base 31, which is magnetically and attractively connected with the first magnetic member 24 to magnetically attract the first magnetic member 24 to the base 31.

[0131] The base 31 refers to a structure in the magnetic attraction structure 30 for providing a fixed basis for the second magnetic member 32 and other structures. The base 31 can be a frame structure, a box-shaped structure, or other shaped structures. The shape of the base 31 can be prismatic, cylindrical, prismatic, or other shapes. The base 31 is connected to the box body 10. The base 31 can be connected to the box body 10 by screwing, welding, or other methods. According to the position of the magnetic attraction structure 30, the base 31 can be connected to the bottom surface of the box body 10, or to the side surface or top surface of the box body 10. The material of the base 31 can include metal, plastic, or other materials.

[0132] The base 31 has a surface facing the first magnetic member 24, and the magnetic attraction structure 30 can magnetically attract the first magnetic member 24 to the surface, which can be the top surface or side surface of the base 31. The battery monomer 20 can be fixed on the base 31 under the action of the magnetic attraction force between the first magnetic member 24 and the magnetic attraction structure 30, thereby achieving the effect of fixing the battery monomer 20 in the box body 10.

[0133] The second magnetic member 32 refers to a structure with magnetism in the magnetic attraction structure 30. The second magnetic member 32 can be a magnet or the like with magnetism and capable of magnetically attracting other magnetic attraction structures 30. For example, the second magnetic member 32 can be a permanent magnet, an electromagnet, or the like. The second magnetic member 32 can also be a structure with magnetism and capable of being attracted by a magnet. For example, the second magnetic member 32 can be an iron structure member, a nickel structure member, or the like. In an example, the second magnetic member 32 can be a permanent magnet.

[0134] The second magnetic member 32 can be a sheet structure, a block structure, a columnar structure, or a structure of other shapes. The second magnetic member 32 can be a polygon, a circle, or other regular shapes. The second magnetic member 32 can also be irregular shapes.

[0135] The second magnetic member 32 is arranged in the base 31, that is, the base 31 is provided with a cavity for accommodating the second magnetic member 32. The cavity can be a prismatic space, a cylindrical space, or a space of other shapes. The second magnetic member 32 can be rotatably connected to the base 31, or slidably connected to the base 31, or fixed relative to the base 31. The second magnetic member 32 located in the base 31 can form a magnetic attraction force with the first magnetic member 24 on the battery monomer 20, so as to fix the battery monomer 20 on the base 31. At this time, the first magnetic member 24 and the second magnetic member 32 are located on opposite sides of the wall surface of the base 31 connected with the first magnetic member 24.

[0136] The embodiment provides specific structures of some magnetic attraction structures 30. The base 31 carries the second magnetic member 32 and the battery monomer 20, and the second magnetic member 32 is magnetically and attractively connected with the first magnetic member 24, so as to fix the battery monomer 20 on the base 31 through the first magnetic member 24 and the second magnetic member 32, thereby achieving the effect of fixing the battery monomer 20.

[0137] In some embodiments, the second magnetic member 32 is a permanent magnet.

[0138] The second magnetic member 32 is a permanent magnet, that is, the second magnetic member 32 can attract the first magnetic member 24, so as to fix the battery monomer 20 on the base 31. At this time, the first magnetic member 24 can be a magnet, or a structure with magnetism and capable of being attracted by a magnet.

[0139] For example, the first magnetic member 24 is a ferromagnetic metal member, and the first magnetic member 24 can be a sheet structure to reduce the space occupation.

[0140] In the embodiment, the second magnetic member 32 is a permanent magnet, so that the second magnetic member 32 can stably magnetically attract the first magnetic member 24, thereby improving the fixing stability of the magnetic attraction structure 30 to the battery monomer 20, and reducing the cost.

[0141] Reference Figures 4 to 7 In some embodiments, the base 31 is provided with a cavity 311, and the second magnetic member 32 is accommodated in the cavity 311 and movably connected to the base 31, so as to change the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24.

[0142] The cavity 311 refers to a space structure formed in the base 31. The cavity 311 can be a prismatic space, a cylindrical space or a space of other shapes. The cavity 311 can be a closed space or an open space with one side or multiple sides open. The cavity 311 can be formed in the base 31 only by the base 31, or the cavity 311 can be formed by the base 31 in cooperation with other structures.

[0143] The second magnetic member 32 is accommodated in the cavity 311 and movably connected to the base 31. The second magnetic member 32 can rotate relative to the base 31 or slide relative to the base 31.

[0144] The movement of the second magnetic member 32 can change the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24. Since the second magnetic member 32 magnetically attracts the first magnetic member 24 by a magnetic field, when the part of the magnetic field lines of the second magnetic member 32 that is directed towards and close to the first magnetic member 24 is relatively dense, the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24 is relatively strong; when the part of the magnetic field lines of the second magnetic member 32 that is directed towards and close to the first magnetic member 24 is relatively sparse, the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24 is relatively weak. That is, the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24 can be changed by changing the orientation of the second magnetic member 32 or changing the distance between the second magnetic member 32 and the first magnetic member 24.

[0145] Accordingly, the arrangement can adjust the magnetic attraction force of the second magnetic member 32 to the first magnetic member 24 by controlling the movement of the second magnetic member 32, and thereby adjust the fixing effect of the magnetic attraction structure 30 to the battery monomer 20, so as to facilitate the disassembly and installation of the battery monomer 20 by the workers.

[0146] For example, the second magnetic member 32 is slidably connected in the base 31, and the base 31 is provided with a guide rail, and the second magnetic member 32 is slidably connected to the guide rail, so that the second magnetic member 32 can be close to or away from the first magnetic member 24, thereby enabling the magnetic pole of the second magnetic member 32 to be close to or away from the first magnetic member 24.

[0147] For example, the second magnetic member 32 is rotationally connected in the base 31, the base 31 is provided with a rotating shaft rotationally connected in the base 31, and the second magnetic member 32 is connected to the rotating shaft. The second magnetic member 32 is rotationally adjustable relative to the base 31 to adjust the orientation of the second magnetic member 32, so that the part with stronger or weaker magnetic field of the second magnetic member 32 can be oriented towards the first magnetic member 24.

[0148] When the staff needs to disassemble a certain battery monomer 20, the second magnetic member 32 can be controlled to move away from the first magnetic member 24 or the part with weaker magnetic field of the second magnetic member 32 can be controlled to be oriented towards the first magnetic member 24, so as to reduce the magnetic attraction force of the second magnetic member 32 on the first magnetic member 24, thereby reducing the resistance of taking down the corresponding battery monomer 20; when the staff needs to install a certain battery monomer 20, the second magnetic member 32 can be controlled to move close to the first magnetic member 24 or the part with stronger magnetic field of the second magnetic member 32 can be controlled to be oriented towards the first magnetic member 24, so as to increase the magnetic attraction force of the second magnetic member 32 on the first magnetic member 24, thereby being able to more stably fix the battery monomer 20 in the box body 10.

[0149] In the embodiment, the second magnetic member 32 can move close to or away from the first magnetic member 24, or the part with stronger or weaker magnetic field of the second magnetic member 32 can be oriented towards the first magnetic member 24, and the attraction force of the second magnetic member 32 on the first magnetic member 24 is controlled in this way, thereby facilitating the staff to disassemble and install the battery monomer 20.

[0150] Reference Figures 4 to 9 In some embodiments in which the second magnetic member 32 is movably connected to the base 31, the second magnetic member 32 is rotationally connected in the base 31, the rotation axis of the second magnetic member 32 is parallel to the first magnetic member 24, and the magnetic poles of the second magnetic member 32 are arranged in a direction perpendicular to the rotation axis.

[0151] The second magnetic member 32 is rotationally connected to the base 31, that is, the second magnetic member 32 can rotate relative to the base 31, the rotation axis of the second magnetic member 32 is parallel to the first magnetic member 24, and the magnetic poles of the second magnetic member 32 are arranged in a direction perpendicular to the rotation axis, that is, in the process of rotation of the second magnetic member 32, the magnetic field intensity of the part of the second magnetic member 32 oriented towards the first magnetic member 24 is different, and the magnetic field of the second magnetic member 32 applied to the first magnetic member 24 is also different; at this time, the transmission of the second magnetic member 32 can adjust the part of the second magnetic member 32 oriented towards or close to the first magnetic member 24, so that the part with stronger or weaker magnetic field can be oriented towards the first magnetic member 24, to adjust the magnetic attraction force of the second magnetic member 32 on the first magnetic member 24.

[0152] In the case where the second magnetic member 32 is rotationally connected to the base 31, the second magnetic member 32 can have a cylindrical structure, so as to facilitate the rotation of the second magnetic member 32 relative to the base 31.

[0153] In some embodiments, the second magnetic member 32 has a cylindrical structure, the rotation axis of the second magnetic member 32 is parallel to the first magnetic member 24, and two magnetic poles of the second magnetic member 32 are arranged along the radial direction of the second magnetic member 32, and are respectively referred to as a first magnetic pole 321 and a second magnetic pole 322. In this case, the second magnetic member 32 can be attached to the inner wall of the base 31 to reduce the minimum distance between the second magnetic member 32 and the first magnetic member 24, and to improve the fixing effect of the second magnetic member 32. Meanwhile, the rotation of the second magnetic member 32 can make the first magnetic pole 321 or the second magnetic pole 322 face or stagger the first magnetic member 24, so that the part of the second magnetic member 32 with stronger or weaker magnetic field faces the first magnetic member 24, thereby facilitating the adjustment of the magnetic attraction force of the second magnetic member 32 on the first magnetic member 24.

[0154] The embodiments provide some movement modes of the second magnetic member 32, so that the second magnetic member 32 is rotationally connected to the base 31. By rotating the second magnetic member 32, the position of the second magnetic member 32 facing the first magnetic member 24 can be adjusted, and the adjustment of the magnetic attraction force of the second magnetic member 32 on the first magnetic member 24 is achieved, thereby facilitating the disassembly and installation of the battery monomer 20 by the staff.

[0155] Reference Figures 4 to 7 In some embodiments in which the second magnetic member 32 is movably connected to the base 31, the magnetic attraction structure 30 further comprises a handle 33 connected to the second magnetic member 32, and the handle 33 is configured to drive the second magnetic member 32 to rotate relative to the base 31.

[0156] The handle 33 refers to a structure in the magnetic attraction structure 30 for adjusting the position of the second magnetic member 32 relative to the base 31. The handle 33 can have a disc-shaped structure, a columnar structure, or other shapes. The handle 33 is connected to the second magnetic member 32. The handle 33 can be directly connected to the second magnetic member 32, or indirectly connected to the second magnetic member 32 through an intermediate structure. The handle 33 can be connected to the second magnetic member 32 by adhesion, welding, or the like.

[0157] The handle 33 can be located inside the base 31, or can extend outside the base 31. The handle 33 can extend outside the box body 10, or can be located inside the box body 10. In some embodiments, the handle 33 extends outside the base 31 for easy operation. In order to reduce the space occupation of the battery device 100 as a whole, the handle 33 is located inside the box body 10.

[0158] According to the movement direction and movement relationship of the second magnetic member 32, the handle 33 can slide relative to the base 31 to drive the second magnetic member 32 to slide, or the handle 33 can rotate relative to the base 31 to drive the second magnetic member 32 to rotate. In some embodiments, the handle 33 is rotationally connected to the base 31 to drive the second magnetic member 32 to rotate relative to the base 31.

[0159] The embodiment provides specific structures of the magnetic attraction structure 30, the handle 33, and the connection of the handle 33 to the second magnetic member 32, so that the worker can drive the second magnetic member 32 to move through the handle 33, thereby facilitating the worker to adjust the attraction force of the second magnetic member 32 on the first magnetic member 24.

[0160] Reference Figures 4 to 6 In some embodiments, the battery device 100 includes a plurality of battery monomers 20 arranged along at least a first direction; the base 31 extends along the first direction; and the second magnetic member 32 extends along the first direction and corresponds to the plurality of battery monomers 20 arranged along the first direction, so as to attract the plurality of battery monomers 20 arranged along the first direction to the base 31.

[0161] The plurality of battery monomers 20 are arranged along the first direction, which can be the length direction X of the battery device 100 or the width direction Y of the battery device 100; the plurality of battery monomers 20 can be arranged along only the first direction, or can be arranged along other directions simultaneously; for example, the first direction is the length direction X of the battery device 100, and the plurality of battery monomers 20 are arranged along the length direction X and the width direction Y of the battery device 100 simultaneously.

[0162] The base 31 extends along the first direction, so that the base 31 can be connected to the plurality of battery monomers 20 arranged along the first direction, so that the base 31 can carry the plurality of battery monomers 20.

[0163] In the first direction, only one base 31 can be provided, and the size of the base 31 in the first direction is greater than or equal to the sum of the sizes of all battery monomers 20 in the first direction, so that one base 31 can carry all battery monomers 20 arranged in the first direction; in the first direction, two or more bases 31 can also be provided, and the number of battery monomers 20 carried by each base 31 is less than the sum of the number of battery monomers 20 in the first direction.

[0164] In the case that the base 31 can carry the plurality of battery monomers 20 along the first direction, the second magnetic member 32 in the base 31 can extend along the first direction and correspond to the plurality of battery monomers 20; in the case that the second magnetic member 32 in the base 31 corresponds to the plurality of battery monomers 20, the number of battery monomers 20 magnetically attracted by the second magnetic member 32 can be the same as the number of battery monomers 20 carried by the base 31, in which case only one second magnetic member 32 can be provided in the base 31, the number of battery monomers 20 magnetically attracted by the second magnetic member 32 can be less than the number of battery monomers 20 carried by the base 31, in which case two or more second magnetic members 32 can be provided in the base 31.

[0165] In an example, the second magnetic member 32 is movable relative to the base 31, and the second magnetic member 32 is connected to the handle 33. A worker can adjust the magnetic attraction force of the second magnetic member 32 on the plurality of battery monomers 20 by moving the second magnetic member 32 through the handle 33.

[0166] The base 31 has a specific structure in the embodiment, and the base 31 extends in the first direction, so that the second magnetic member 32 can fix each battery monomer 20 arranged in the first direction on the base 31. Thus, the structure of the magnetic attraction structure 30 can be simplified, and the position or state of the second magnetic member 32 can be controlled.

[0167] Reference Figure 2 、 Figures 4 to 8 The box 10 includes a top structure 111 and a bottom structure 121 spaced apart from the top structure 111. The top structure 111 and the bottom structure 121 form a containing cavity 101 therebetween, and the battery monomers 20 are contained in the containing cavity 101. The base 31 is arranged on the bottom structure 121.

[0168] The top structure 111 and the bottom structure 121 are two structures of the box 10 arranged opposite to each other, and the battery monomers 20 are located between the top structure 111 and the bottom structure 121. The top structure 111 and the bottom structure 121 can be spaced apart along the height direction X of the battery device 100, or can be spaced apart along other directions. In the case that the box 10 includes a first box 11 and a second box 12, the top structure 111 can be a partial structure of the first box 11, and the bottom structure 121 can be a partial structure of the second box 12.

[0169] The top structure 111 can be a plate structure, or can be formed by a plurality of section steels. According to the shape of the battery device 100, the top structure 111 can have a circular shape, a polygonal shape, or other shapes. The material of the top structure 111 can include metal, plastic, or other materials.

[0170] The bottom structure 121 can be a plate structure, or can include a plurality of channels for the flow of heat exchange medium. According to the shape of the battery device 100, the bottom structure 121 can have a circular shape, a polygonal shape, or other shapes. The material of the bottom structure 121 can include metal, plastic, or other materials.

[0171] In an example, the first box 11 can include the top structure 111, and the second box 12 can include a frame structure and the bottom structure 121. The bottom structure 121 is connected to one open end of the frame structure and forms the second box 12. At this time, the top structure 111 can be connected to the other open end of the frame structure and form the box 10.

[0172] The accommodating cavity 101 refers to a space structure formed between the top structure 111 and the bottom structure 121, and is used to accommodate the battery monomer 20. The accommodating cavity 101 can be a cuboid space, or a cylindrical space or a space of other shapes. In an example, when the box body 10 includes a frame structure, the top structure 111, the bottom structure 121 and the frame structure enclose the accommodating cavity 101, and separate the accommodating cavity 101 from the space outside the battery device 100.

[0173] The base 31 is arranged on the bottom structure 121, that is, the magnetic attraction structure 30 is arranged on the bottom structure 121, so as to fix the battery monomer 20 on the bottom structure 121. In an example, the bottom structure 121 can be a plate body, and the magnetic attraction structure 30 is arranged on the plate body and magnetically attracts the battery monomer 20. In an example, the bottom structure 121 can also be a heat exchange assembly 1212, and the magnetic attraction structure 30 is arranged on the heat exchange assembly 1212 and magnetically attracts the battery monomer 20 to the heat exchange assembly 1212.

[0174] In the embodiment, the box body 10 includes the top structure 111 and the bottom structure 121, and the magnetic attraction structure 30 is arranged on the bottom structure 121. The battery monomer 20 is fixed on the bottom structure 121 of the lower box body 10 by the magnetic attraction structure 30, so that the magnetic attraction structure 30 can not only fix the battery monomer 20 on the box body 10, but also reduce the interference of the magnetic attraction structure 30 on the arrangement of the battery monomer 20, and reduce the occupation of the magnetic attraction structure 30 on the internal space of the box body 10.

[0175] Reference Figures 5 to 7 、 Figure 9 In some embodiments in which the base 31 is arranged on the bottom structure 121, the bottom structure 121 is provided with a heat conduction layer 40 on the side facing the accommodating cavity 101, and the heat conduction layer 40 is connected to the magnetic attraction structure 30.

[0176] The heat conduction layer 40 refers to a structure for transferring heat in the battery device 100, and is arranged on the side of the bottom structure 121 facing the accommodating cavity 101. The heat conduction layer 40 can completely cover the side of the bottom structure 121 facing the accommodating cavity 101, or can only cover part of the side of the bottom structure 121 facing the accommodating cavity 101. The heat conduction layer 40 can be a plate structure, or a coating or other structure formed on the bottom structure 121. According to the structure of the heat conduction layer 40, the heat conduction layer 40 can be connected to the bottom structure 121 by welding, bonding or the like, or can be formed on the bottom structure 121 by spraying, coating or the like.

[0177] The heat-conducting layer 40 is connected to the magnetic attraction structure 30. The heat-conducting layer 40 can be connected to each structure in the magnetic attraction structure 30. The heat-conducting layer 40 can be connected to only the base 31 or the second magnetic member 32, or can be connected to both the base 31 and the second magnetic member 32. The connection between the heat-conducting layer 40 and the base 31 can be a contact connection, or can be an adhesive connection or other connection mode. The connection between the heat-conducting layer 40 and the second magnetic member 32 can be a contact connection, so as to reduce the interference of the heat-conducting layer 40 on the movement of the second magnetic member 32. In the case where the second magnetic member 32 magnetically attracts the first magnetic member 24 to fix the battery monomer 20 on the base 31, the heat generated by the charging and discharging of the battery monomer 20 can be transmitted to the base 31. In the case where the heat-conducting layer 40 is connected to the base 31, the heat transmitted to the base 31 can be transmitted to the bottom structure 121 through the heat-conducting layer 40, and can be dissipated to the outside or transmitted to other structures of the battery device 100 through the bottom structure 121.

[0178] For example, the heat-conducting layer 40 abuts against the second magnetic member 32. In the case where the second magnetic member 32 magnetically attracts the battery monomer 20, one end of the second magnetic member 32 can abut against the inner wall of the base 31. At this time, part of the heat of the battery monomer 20 can be transmitted to the second magnetic member 32 through the base 31, and can be transmitted to the heat-conducting layer 40 through the second magnetic member 32.

[0179] In this embodiment, the heat-conducting layer 40 is provided and connected to the magnetic attraction structure 30. Part of the heat of the battery monomer 20 is transmitted to the bottom structure 121 through the first magnetic member 24, the base 31, the second magnetic member 32 and the heat-conducting layer 40, so as to better transmit the heat of the battery monomer 20 and achieve heat exchange, thereby facilitating better control of the temperature of the battery monomer 20.

[0180] Reference Figures 5 to 7 、 Figure 9 In some embodiments in which the bottom structure 121 is provided with the heat-conducting layer 40, the base 31 is provided with a cavity 311 facing the opening and facing the bottom structure 121. The second magnetic member 32 is accommodated in the cavity 311. The second magnetic member 32 is in a cylindrical structure and has an axis parallel to the bottom structure 121. One side of the second magnetic member 32 abuts against the base 31, and the other side of the second magnetic member 32 abuts against the heat-conducting layer 40.

[0181] The opening of the cavity 311 faces the bottom structure 121, that is, the cavity 311 is a space structure with one end open. At this time, the base 31 and the bottom structure 121 jointly enclose the internal space of the base 31, so that the second magnetic member 32 can be accommodated in the internal space.

[0182] The second magnetic member 32 is in a cylindrical structure, and the axis of the second magnetic member 32 is parallel to the bottom structure 121. In this way, the distance between the second magnetic member 32 and the inner wall of the base 31 remains unchanged when the second magnetic member 32 rotates in the cavity 311.

[0183] One side of the second magnetic member 32 abuts against the inner wall of the base 31, and the other side of the second magnetic member 32 abuts against the heat-conducting layer 40. The heat generated by the battery monomer 20 can be directly conducted to the second magnetic member 32 through the base 31 and then directly conducted to the heat-conducting layer 40 through the second magnetic member 32. In this way, the path of heat transfer is shortened, so that more heat can be transferred to the bottom structure 121, thereby reducing the heat dissipated to the inside of the box 10 during heat transfer and improving the temperature control efficiency.

[0184] When the second magnetic member 32 is opposite to the first magnetic member 24, the second magnetic member 32 abuts against the inner wall of the base 31, which can further reduce the distance between the second magnetic member 32 and the battery monomer 20, so that the second magnetic member 32 can more stably fix the battery monomer 20.

[0185] The embodiment provides specific structural relationship of the second magnetic member 32 and the heat-conducting layer 40. One end of the second magnetic member 32 abuts against the base 31, and the other end of the second magnetic member 32 abuts against the heat-conducting layer 40. In this way, the second magnetic member 32 can be used to transfer the heat of the battery monomer 20 in addition to fixing the battery monomer 20, thereby facilitating heat exchange between the battery monomer 20 and other structures.

[0186] Reference Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 In some embodiments in which the bottom structure 121 is provided with the heat-conducting layer 40, the bottom structure 121 includes a plate body 1211, and the plate body 1211 is provided with the heat-conducting layer 40 on the side facing the accommodating cavity 101. The battery device 100 further includes a heat exchange assembly 1212 arranged on the side of the plate body 1211 away from the accommodating cavity 101.

[0187] The plate body 1211 refers to a structure in the bottom structure 121 for bearing the battery monomer 20, the magnetic attraction structure 30 or other structures. The shape of the plate body 1211 can be square, circular or other shapes, and the shape of the plate body 1211 can be arranged according to the shape of the battery device 100. The material of the plate body 1211 can include metal, plastic or other materials.

[0188] The heat exchange component 1212 refers to a structure in the battery device 100 for heat exchange with the battery monomer 20 or other structures of the battery device 100. The heat exchange component 1212 can include a cold plate, a pipe, or other structures, and a heat exchange medium can flow in the heat exchange component 1212 to exchange heat with the adjacent battery monomer 20 or other structures of the battery device 100 through the heat exchange medium.

[0189] The plate body 1211 is provided with the heat conduction layer 40 on the side facing the accommodating cavity 101, so that the base 31 and / or the second magnetic member 32 can transfer heat to the plate body 1211. The plate body 1211 is provided with the heat exchange component 1212 on the side away from the accommodating cavity 101, so that the heat transferred to the heat conduction layer 40 can be transferred to the heat exchange component 1212.

[0190] In this embodiment, the heat of the battery monomer 20 can be transferred to the heat exchange component 1212 through the first magnetic member 24, the base 31, the second magnetic member 32, the heat conduction layer 40, and the plate body 1211, so that the heat exchange component 1212 can exchange heat with the battery monomer 20, thereby enabling the heat exchange component 1212 to better control the temperature of the battery monomer 20.

[0191] Reference Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 In some embodiments in which the bottom structure 121 is provided with the heat conduction layer 40, the bottom structure 121 includes the heat exchange component 1212, and the heat conduction layer 40 and the base 31 are arranged on the side of the heat exchange component 1212 facing the accommodating cavity 101.

[0192] In this embodiment, the bottom structure 121 includes the heat exchange component 1212, and the heat conduction layer 40 is arranged on the side of the heat exchange component 1212 facing the accommodating cavity 101. That is, in this embodiment, the heat exchange component 1212 directly serves as the bottom structure 121 of the box body 10 without the need for additional structures such as the plate body 1211 as an intermediate structure. The heat exchange component 1212 in this embodiment is used not only for heat exchange with the battery monomer 20 and other structures, but also for carrying the battery monomer 20, the magnetic attraction structure 30, and other structures.

[0193] In this embodiment, the heat exchange component 1212 serves as the bottom structure 121. At this time, the heat conduction layer 40 is directly formed on the heat exchange component 1212, and the base 31 is directly connected to the heat exchange component 1212. At this time, the heat of the battery monomer 20 can be directly transferred to the heat exchange component 1212 through the first magnetic member 24, the base 31, and the second magnetic member 32, thereby simplifying the heat transfer path and improving the heat exchange efficiency.

[0194] In some embodiments, the side of the base 31 facing the first magnetic member 24 is provided with the heat conduction layer 40, and the heat conduction layer 40 is connected to the first magnetic member 24.

[0195] The heat-conducting layer 40 is arranged on the side of the base 31 facing the first magnetic member 24 and is connected to the first magnetic member 24, that is, the heat-conducting layer 40 is located between the base 31 and the first magnetic member 24.

[0196] In the case where the second magnetic member 32 magnetically attracts the first magnetic member 24 to the base 31, the first magnetic member 24 can abut against the first magnetic member 24, and at this time, the heat of the battery monomer 20 can be transmitted to the base 31 through the first magnetic member 24 and the heat-conducting layer 40.

[0197] This arrangement can make the heat generated by the charging and discharging of the battery monomer 20 better transmitted to the magnetic attraction structure 30; in the case where the heat-conducting layer 40 is also arranged between the magnetic attraction structure 30 and the bottom structure 121, this arrangement makes the heat generated by the charging and discharging of the battery monomer 20 better transmitted to the bottom structure 121 through the plurality of heat-conducting layers 40 and the magnetic attraction structure 30, so as to control the temperature of the battery monomer 20.

[0198] In this embodiment, the heat-conducting layer 40 is also arranged between the first magnetic member 24 and the base 31, so that the heat generated by the charging and discharging of the battery monomer 20 can be better transmitted to the base 31, thereby making the battery monomer 20 better exchange heat with the magnetic attraction structure 30.

[0199] Reference Figure 11 、 Figure 12 In some embodiments, the battery device 100 further comprises a partition structure 60 arranged in the box 10, the partition structure 60 comprises a partition member 61 movably arranged in the box 10, the partition member 61 is configured to be movable between the first magnetic member 24 and the second magnetic member 32 to hinder the second magnetic member 32 from magnetically attracting the first magnetic member 24.

[0200] The partition structure 60 refers to a structure in the battery device 100 that hinders the magnetic attraction structure 30 from magnetically attracting the battery monomer 20; the partition member 61 refers to a structure in the partition structure 60 that hinders the second magnetic member 32 from magnetically attracting the first magnetic member 24, and the partition member 61 can be a hard structure, such as a plate body, a sheet-shaped structure, etc., or a flexible structure, such as a diaphragm, a curtain, etc.

[0201] The partition member 61 is movably connected in the box 10, so that the partition member 61 can move between the second magnetic member 32 and the first magnetic member 24 to weaken the magnetic attraction force of the second magnetic member 32 applied to the first magnetic member 24; a guide rail, a guide groove or the like structure can be arranged in the box 10, and part of the partition member 61 can slide along the guide rail, the guide groove or the like structure to achieve the effect of guiding the movement of the partition member 61.

[0202] In the case that the partition member 61 is located between the second magnetic member 32 and the first magnetic member 24, the magnetic field between the second magnetic member 32 and the first magnetic member 24 needs to pass through the partition member 61 and be magnetically attracted to each other, and the magnetic field passing through the partition member 61 will weaken the magnetic attraction. Therefore, the material of the partition member 61 can include a magnetic conductive material or other materials.

[0203] The partition member 61 can be arranged in the base 31 or outside the base 31. In the case that the partition member 61 is arranged outside the base 31, a passage can be arranged on the base 31 for the partition member 61 to pass through, so as to facilitate the movement of the partition member 61 between the second magnetic member 32 and the first magnetic member 24.

[0204] The number of the partition structure 60 can be one, two or more. In the case that the number of the partition structure 60 is one, the partition member 61 can move between each second magnetic member 32 and the corresponding first magnetic member 24 to hinder the magnetic attraction between each battery monomer 20 and the corresponding magnetic attraction structure 30. In the case that the number of the partition structure 60 is more than one, one partition structure 60 can be arranged beside each magnetic attraction structure 30, or one partition structure 60 can correspond to multiple magnetic attraction structures 30.

[0205] In the embodiment, the partition member 61 is arranged to be movable, so as to hinder the magnetic attraction between the second magnetic member 32 and the first magnetic member 24 by the partition member 61, thereby facilitating the workers to remove and replace the battery monomer 20 from the magnetic attraction structure 30. Meanwhile, the partition member 61 can also move out of the second magnetic member 32 and the first magnetic member 24, so as to facilitate the magnetic attraction between the second magnetic member 32 and the first magnetic member 24, thereby facilitating the installation and fixation of the battery monomer 20.

[0206] Reference Figure 11 、 Figure 12 In some embodiments in which the battery device 100 includes the partition structure 60, the partition member 61 is a flexible member, and the partition structure 60 further includes a winding drum 62 rotatably connected to the box 10, and the partition member 61 is wound on the winding drum 62.

[0207] The partition member 61 is a flexible member, and the partition member 61 can be a curtain, a diaphragm or the like.

[0208] The winding drum 62 is a structure in the partition structure 60 for winding the partition member 61, and the partition member 61 can be wound on the winding drum 62. The winding drum 62 can be a cylindrical structure, a prismatic structure or other shaped structure. The winding drum 62 can be directly rotatably connected to the box 10, or indirectly rotatably connected to the box 10 through an intermediate structure. Part of the winding drum 62 can extend out of the box 10, so as to facilitate the workers to rotate the winding drum 62. The winding drum 62 can also be completely located in the box 10, and the workers can rotate the winding drum 62 by disassembling the box 10.

[0209] According to the number of the magnetic attraction structures 30 corresponding to the partition member 61, the size of the base 31, the diameter of the winding drum 62 and other parameters, the partition member 61 can be wound on the winding drum 62 only once, or can be wound two or more times.

[0210] For example, only one partition structure 60 can be arranged in the box body 10, that is, only one winding drum 62 and one partition member 61 are included, at this time, the partition member 61 can hinder the magnetic attraction and adsorption of all the magnetic attraction structures 30 in the box body 10 to the battery monomer 20, the width of the partition member 61 can be the same or substantially the same as the width of the box body 10, and in the case of pulling the partition member 61 out of the winding drum 62, the length of the partition member 61 can be the same or substantially the same as the length of the box body 10; in the case of needing to dismount the battery monomer 20, the worker can pull the partition member 61 and make the partition member 61 pass through each base 31 so that the partition member 61 is located between each second magnetic member 32 and each first magnetic member 24; after the installation of the battery monomer 20 is completed, the worker can drive the winding drum 62 to wind up the partition member 61.

[0211] For example, multiple partition structures 60 can also be arranged in the box body 10, and each partition structure 60 corresponds to each magnetic attraction structure 30, so as to facilitate the worker to install and dismount one or several battery monomers 20 according to needs.

[0212] The embodiment provides specific structures of some partition structures 60, and the partition member 61 is wound by the winding drum 62 to reduce the space occupation of the partition structure 60; at the same time, under this arrangement, the partition member 61 can move between multiple second magnetic members 32 and corresponding multiple first magnetic members 24 to hinder the magnetic attraction and adsorption of the magnetic attraction structure 30 to the multiple battery monomers 20, thereby facilitating the installation and replacement of more battery monomers 20.

[0213] Reference Figure 11 、 Figure 12 In some embodiments of the battery device 100 including the partition structure 60, the partition member 61 is a magnetic conductive structure.

[0214] The partition member 61 is a magnetic conductive structure, that is, the material of the partition member 61 can include a magnetic conductive material; the magnetic conductive material can reabsorb and redistribute the magnetic field lines, and in the case that the partition member 61 is located between the second magnetic member 32 and the first magnetic member 24, part of the magnetic field lines between the second magnetic member 32 and the first magnetic member 24 can be transmitted along the partition member 61 and be constrained inside or around the partition member 61, thereby reducing the magnetic field lines transmitted from the second magnetic member 32 to the first magnetic member 24 and from the first magnetic member 24 to the second magnetic member 32, and reducing the magnetic attraction force between the second magnetic member 32 and the first magnetic member 24.

[0215] The material of the partition member 61 can include silicon steel, iron-nickel alloy, etc.

[0216] The embodiment provides some structures of the partition member 61, so that the partition member 61 can hinder the second magnetic member 32 from magnetically attracting the first magnetic member 24.

[0217] In some embodiments, the battery device 100 comprises a heat exchange assembly 1212 located in the accommodating cavity 101 and connected to the box 10, the magnetic attraction structure 30 is connected to the heat exchange assembly 1212, and a heat conduction layer 40 is arranged between the magnetic attraction structure 30 and the heat exchange assembly 1212.

[0218] The heat exchange assembly 1212 is arranged in the box 10, and in addition to being connected to the bottom structure 121, the heat exchange structure can be arranged at other positions, for example, between two adjacent battery monomers 20 or on the side wall inside the box 10.

[0219] For example, the heat exchange assembly 1212 can be arranged between two adjacent battery monomers 20, and the magnetic attraction structure 30 can be arranged on the opposite sides of the heat exchange assembly 1212. At this time, the first magnetic member 24 of the battery monomer 20 adjacent to the heat exchange assembly 1212 is arranged on the side of the shell 21 facing the heat exchange assembly 1212, and the two battery monomers 20 can be fixed on the heat exchange assembly 1212 through the magnetic attraction structure 30, so as to be more stably fixed in the box 10.

[0220] The heat conduction layer 40 is arranged between the magnetic attraction structure 30 and the heat exchange assembly 1212, and the heat generated by the magnetic attraction structure 30 during charging and discharging of the corresponding battery monomer 20 can be transmitted to the heat exchange assembly 1212 through the magnetic attraction structure 30 and the heat conduction layer 40, so that the heat exchange assembly 1212 can better exchange heat with the adjacent battery monomer 20 and better perform thermal management of the adjacent battery monomer 20.

[0221] In the embodiment, the magnetic attraction structure 30 is connected to the heat exchange assembly 1212 through the heat conduction layer 40, so that the side of the battery monomer 20 connected to the magnetic attraction structure 30 can also exchange heat with the heat exchange assembly 1212, reducing the negative impact of the magnetic attraction structure 30 on the temperature control of the battery monomer 20.

[0222] In some embodiments, the first magnetic member 24 is a magnet, and any magnetic pole of the first magnetic member 24 faces the magnetic attraction structure 30.

[0223] The first magnetic member 24 is a magnet, that is, the first magnetic member 24 can attract the magnetic attraction structure 30 to fix the battery monomer 20 on the base 31; the first magnetic member 24 can be a permanent magnet, can be an electromagnet or other magnet with magnetic attraction performance; at this time, the magnetic attraction structure 30 can include a magnet, or can include a structure with magnetism and capable of being attracted by a magnet.

[0224] For example, the magnetic attraction structure 30 comprises a ferromagnetic metal member, and the first magnetic member 24 can be a sheet structure to reduce the space occupation.

[0225] Any magnetic pole of the first magnetic member 24 faces the magnetic attraction structure 30, so that the first magnetic member 24 can be magnetically attracted to the magnetic attraction structure 30. For example, when the magnetic attraction structure 30 comprises a ferromagnetic metal member, any magnetic pole of the first magnetic member 24 can fix the battery monomer 20 on the magnetic attraction structure 30 by magnetic attraction; for example, when the magnetic attraction structure 30 comprises a magnet, the magnetic pole of the first magnetic member 24 facing the magnetic attraction structure 30 should be different from the magnetic pole of the magnetic attraction structure 30 facing the first magnetic member 24, so that the first magnetic member 24 can be magnetically attracted to the magnetic attraction structure 30.

[0226] In the embodiment, the first magnetic member 24 is a magnet, and the first magnetic member 24 and the second magnetic member 32 can be magnetically attracted to each other, so that the battery monomer 20 can be more stably fixed in the box body 10,

[0227] In some embodiments, the first magnetic member 24 is a ferromagnetic metal structure.

[0228] The first magnetic member 24 can be a structure with ferromagnetism and can be attracted by a magnet. The first magnetic member 24 can be an iron structure, a nickel structure, etc.

[0229] The first magnetic member 24 can be an independent structure, such as an independent plate body 1211 structure, a block structure, etc. The first magnetic member 24 can also be a layered structure formed on the shell 21, such as a coating, etc.

[0230] For example, when the first magnetic member 24 is a layered structure, the first magnetic member 24 can comprise powders of materials such as iron, ferric oxide, chromium dioxide, etc. to provide magnetism. At the same time, it can also comprise materials such as polyurethane, chloroethylene, vinyl acetate, etc. to provide properties such as adhesion.

[0231] For example, when the first magnetic member 24 is a layered structure, the first magnetic member 24 can be an epoxy resin paint mixed with magnetic particles such as iron powder, cobalt powder or nickel powder.

[0232] In the embodiment, the first magnetic member 24 is a ferromagnetic metal structure, so that the magnetic attraction structure 30 can better magnetically attract the first magnetic member 24, so that the battery monomer 20 can be stably fixed in the box body 10.

[0233] In some embodiments in which the first magnetic member 24 is a ferromagnetic metal structure, the first magnetic member 24 is a magnetic conductive structure.

[0234] The first magnetic member 24 is a magnetic conductive structure, that is, the material of the first magnetic member 24 includes a magnetic conductive material, which refers to a material having magnetic conductive performance. The magnetic conductive material has excellent magnetic field conductive performance, so as to concentrate the magnetic field lines in or near the magnetic conductive structure. In the case that the magnetic field acts on the magnetic conductive structure, the magnetic field lines will be conducted along the bayonet structure, so as to concentrate the magnetic field and reduce the magnetic field overflow, thereby reducing the negative influence of the magnetic field between the first magnetic member 24 and the magnetic attraction structure 30 on other structures in the box body 10, and reducing the negative influence of the magnetic field between the first magnetic member 24 and the magnetic attraction structure 30 on other structures of the battery device 100.

[0235] On the basis that the first magnetic member 24 is a ferromagnetic metal structure, the first magnetic member 24 can also be a magnetic conductive structure, that is, the material of the first magnetic member 24 has magnetism to facilitate the magnetic attraction of the magnetic attraction structure 30, and the material of the first magnetic member 24 also has magnetic conductive performance to guide the magnetic field lines and reduce magnetic overflow.

[0236] The material of the first magnetic member 24 can include silicon steel and iron-nickel alloy. It can be understood that, in addition to silicon steel and iron-nickel alloy, the material of the first magnetic member 24 can include other materials having magnetic conductive performance and magnetism, and is not limited to the above two.

[0237] In the embodiment, the first magnetic member 24 is a magnetic conductive structure, so as to concentrate the magnetic field generated by the magnetic attraction structure 30 through the first magnetic member 24, and reduce the influence of the magnetic attraction structure 30 on other structures inside or outside the battery device 100.

[0238] In some embodiments in which the first magnetic member 24 is a magnetic conductive structure, the first magnetic member 24 is a silicon steel structure or an iron-nickel alloy structure.

[0239] The first magnetic member 24 can be a silicon steel structure. Silicon steel has the characteristics of high magnetic permeability, low hysteresis loss and high saturation magnetic induction intensity, so that the magnetic attraction structure 30 can stably attract the first magnetic member 24, and can concentrate the magnetic field to reduce magnetic field overflow. At the same time, silicon steel also has good mechanical strength, good thermal stability and corrosion resistance, so as to adapt to the internal environment of the battery device 100.

[0240] The first magnetic member 24 can also be an iron-nickel alloy structure. Iron-nickel alloy has the characteristics of high magnetic permeability, low hysteresis loss and high saturation magnetic induction intensity, so that the magnetic attraction structure 30 can stably attract the first magnetic member 24, and can concentrate the magnetic field to reduce magnetic field overflow. At the same time, iron-nickel alloy also has good thermal stability and corrosion resistance, so as to adapt to the internal environment of the battery device 100. Iron-nickel alloy also has good machinability, so as to facilitate processing and reduce processing cost.

[0241] The embodiment provides specific materials of the first magnetic member 24, so that the first magnetic member 24 can be magnetically attracted and fixed by the magnetic attraction structure 30, and the first magnetic member 24 can also play a role in concentrating a magnetic field, so as to reduce the influence of the magnetic attraction structure 30 on other structures inside or outside the battery device 100.

[0242] Reference Figures 5 to 7 、 Figure 9 In some embodiments, the battery monomer 20 further comprises an insulation structure 25; the insulation structure 25 is arranged between the shell 21 and the first magnetic member 24, or the insulation structure 25 is arranged on a side of the first magnetic member 24 facing the magnetic attraction structure 30.

[0243] The insulation structure 25 refers to a structure of the battery monomer 20 playing an insulation role. The insulation structure 25 can include independent structural members, such as plate members, film structures and the like. The insulation structure 25 can also include structures formed on the shell 21, such as coating layers, spraying layers and the like.

[0244] The insulation structure 25 can be arranged between the shell 21 and the first magnetic member 24, that is, the insulation structure 25 is connected to the shell 21, and the first magnetic member 24 is connected to a side of the insulation structure 25 away from the first magnetic member 24. At this time, the first magnetic member 24 is indirectly connected to the shell 21 through the insulation structure 25. According to the specific structure of the insulation structure 25, the insulation structure 25 can be connected to the shell 21 by welding, bonding or the like. According to the specific structure of the insulation structure 25, the first magnetic member 24 can be connected to the insulation structure 25 by welding, bonding or the like.

[0245] The insulation structure 25 can be arranged on a side of the first magnetic member 24 facing the magnetic attraction structure 30, that is, the insulation structure 25 is located on a side of the first magnetic member 24 away from the shell 21, and the first magnetic member 24 is connected to the shell 21, and the insulation structure 25 is connected to a side of the first magnetic member 24 away from the shell 21. According to the specific structure of the insulation structure 25, the insulation structure 25 can be connected to the first magnetic member 24 by welding, bonding or the like. According to the specific structure of the insulation structure 25, the first magnetic member 24 can be connected to the shell 21 by welding, bonding or the like.

[0246] The arrangement of the insulation structure 25 can reduce the risk of short circuit of the battery monomer 20 through the first magnetic member 24, the magnetic attraction structure 30, the box body 10 and other battery monomers 20 or other electrical structures of the battery device 100, thereby improving the stability and safety performance of the battery device 100.

[0247] In this embodiment, the insulating structure 25 is arranged to reduce the risk of short circuit and other adverse conditions between the battery monomer 20 and the magnetic attraction structure 30, and to improve the safety performance and stability of the battery device 100.

[0248] Reference Figures 5 to 8 In some embodiments, the battery device 100 further comprises a limiting piece 50 connected to the box 10, the limiting piece 50 is located at least one side of the magnetic attraction structure 30, and the height of the limiting piece 50 is greater than the height of the magnetic attraction structure 30.

[0249] The limiting piece 50 refers to a structure used by the battery device 100 to assist in fixing the battery monomer 20, and the limiting piece 50 is arranged at least one side of the magnetic attraction structure 30, that is, the limiting piece 50 can be arranged at one side of the magnetic attraction structure 30, or at both sides of the magnetic attraction structure 30 or around the magnetic attraction structure 30; The limiting piece 50 can abut against the magnetic attraction structure 30, or be arranged separately from the magnetic attraction structure 30; The limiting piece 50 can be a columnar structure, a plate structure or other shaped structure, and the shape of the limiting piece 50 can be square, semicircular or other shape; The limiting piece 50 is connected to the box 10, and the limiting piece 50 can be connected to the box 10 by welding, screwing or other means; The material of the limiting piece 50 can include metal, plastic or other materials.

[0250] The limiting piece 50 can be arranged one-to-one with the magnetic attraction structure 30, and the limiting piece 50 can be located only beside one or a few magnetic attraction structures 30; Accordingly, the number of limiting pieces 50 can be one, two or more.

[0251] The limiting piece 50 can be located on the same side of the box 10 as the magnetic attraction structure 30, or the limiting piece 50 and the magnetic attraction structure 30 can be located on different sides of the box 10; For example, the magnetic attraction structure 30 and the limiting piece 50 are both connected to the side of the bottom structure 121 facing the inside of the box 10.

[0252] The height of the limiting piece 50 is greater than the height of the magnetic attraction structure 30, that is, at least part of the limiting piece 50 can be higher than the base 31, so that the part of the limiting piece 50 that is higher than the base 31 can be opposite to the battery monomer 20.

[0253] For example, during the installation of the battery monomer 20 on the magnetic attraction structure 30, the battery monomer 20 can be first abutted against the limiting piece 50 and moved along the limiting piece 50, so as to guide the installation direction of the battery monomer 20 through the limiting piece 50.

[0254] In the example, after the battery cell 20 is installed on the magnetic attraction structure 30, the limiting piece 50 can be arranged at a distance from the battery cell 20, and during normal use of the battery device 100, the limiting piece 50 does not play a role; while in the case of collision or other abnormal conditions of the battery device 100, the limiting piece 50 can limit the movement of the battery cell 20, so as to fix the battery cell 20.

[0255] In the embodiment, the limiting piece 50 is arranged beside the magnetic attraction structure 30 to assist in limiting the displacement of the battery cell 20 relative to the magnetic attraction structure through the limiting piece 50; at the same time, the limiting piece 50 can also play a role in guiding the installation, so as to facilitate the staff to align the battery cell 20 with the magnetic attraction structure 30 during the installation of the battery cell 20.

[0256] Reference Figure 5 Figure 6 In some embodiments, the shell 21 includes a first side and a second side located on the periphery of the shell 21, the first side and the second side are alternately connected end to end, the area of the first side is larger than the area of the second side; the limiting piece 50 is opposite to the second side.

[0257] The first side and the second side both refer to the surface located on the periphery of the shell 21, and the first side and the second side are alternately connected end to end to form the peripheral surface of the shell 21; in the example, when the shell 21 is a cuboid structure, the first side and the second side are both two, and the two first sides are oppositely arranged, and the two second sides are oppositely arranged, and the two first sides and the two second sides are alternately connected end to end to form the side surface of the shell 21.

[0258] The area of the first side is larger than the area of the second side, that is, the first side is the side with a larger area on the periphery of the shell 21.

[0259] Because the battery cell 20 will expand and contract periodically during charging and discharging, and the deformation amount of the first side during expansion and contraction is larger, the limiting piece 50 is opposite to the second side, so as to reduce the force of the limiting piece 50 on the battery cell 20 when the battery cell 20 expands, thereby reducing the damage that the limiting piece 50 may cause to the battery cell 20.

[0260] In the example, each battery cell 20 is arranged along a first direction, and the first side of the first battery cell 20 is also arranged along the first direction; the expansion beam perpendicular to the first direction along the length direction is arranged in the box body 10, and the expansion beam can resist the first side to suppress the expansion and displacement of the battery cell 20, so that the side of the first side of the battery cell 20 does not need to be additionally provided with the limiting piece 50.

[0261] ​In the embodiment, the limiting member 50 is opposite to the second side of the battery monomer 20 with a smaller area, and the first side of the battery monomer 20 with a larger area can abut against each other to limit the position. Therefore, the limiting member 50 can not only limit the position, but also reduce the space occupation of the limiting member 50. Meanwhile, the breathing effect of the battery monomer 20 at the larger first side is more obvious, and the setting can also reduce the damage of the limiting member 50 to the battery monomer 20.

[0262] Reference Figure 5 、 Figure 6 In some embodiments, the battery device 100 includes a plurality of battery monomers 20 arranged along a first direction and / or a second direction to form a battery monomer assembly, the first direction and the second direction are arranged at an angle; the limiting member 50 is arranged on the opposite sides of the battery monomer assembly.

[0263] The battery monomer assembly refers to a structure formed by a plurality of battery monomers 20 arranged in one or more directions. One battery device 100 can include one battery monomer assembly, or two or more battery monomer assemblies. The plurality of battery monomers 20 in the battery monomer assembly can be connected in series, in parallel, or in a mixed manner.

[0264] The plurality of battery monomers 20 in the battery monomer assembly can be arranged only along the first direction or the second direction, or can be arranged along both the first direction and the second direction. The first direction and the second direction are arranged at an angle, that is, the first direction and the second direction are different. The first direction can be perpendicular to the second direction, or the first direction can be arranged at other angles with the second direction. For example, the first direction is the length direction X of the battery device 100, and the second direction is the width direction Y of the battery device 100.

[0265] The limiting member 50 is located on the opposite sides of the battery monomer assembly, that is, the limiting member 50 is opposite to the outermost battery monomer 20 of the battery monomer assembly. Because each battery monomer 20 in the battery monomer assembly can inhibit displacement, the limiting member 50 can be arranged only on the outside of the battery monomer assembly to limit the displacement of the outermost battery monomer 20 of the battery monomer assembly by the limiting member 50, and the force provided by the limiting member 50 can be transmitted through the battery monomer 20 to limit the displacement of the battery monomer assembly.

[0266] This setting makes the limiting member 50 not only assist the magnetic attraction structure 30 to limit the displacement of the battery monomer 20, but also reduce the space occupation of the limiting member 50.

[0267] For example, the box body 10 is provided with an expansion beam arranged along the first direction, and the battery monomer assembly abuts against the expansion beam. At this time, the limiting member 50 can be arranged on the opposite sides of the battery monomer assembly along the second direction.

[0268] The limiting members 50 are arranged on opposite sides of the battery monomer assembly when the limiting members 50 are opposite to the second side; generally, an expansion beam is arranged in the box 10 in the arrangement direction of the first side to limit the displacement of the battery monomers 20 and the expansion of the battery monomers 20, and the battery monomer assembly is generally arranged in the arrangement direction of the second side and spaced from the inner wall of the box 10, and lacks limiting. Accordingly, the limiting members 50 are arranged in the arrangement direction of the second side of the battery monomers 20 in the present embodiment to limit the displacement of the battery monomers 20 by the limiting members 50.

[0269] In some embodiments, the battery device 100 includes the box 10, the battery monomers 20, and the magnetic attraction structure 30.

[0270] The box 10 includes a top structure 111, a bottom structure 121, and a frame structure, the frame structure extends through the height direction Z of the battery device 100, and the top structure 111 and the bottom structure 121 are arranged on opposite sides of the frame structure in the height direction Z of the battery device 100, respectively; the top structure 111, the bottom structure 121, and the frame structure enclose a containing cavity 101 of the battery device 100, and the battery monomers 20 are contained in the containing cavity 101.

[0271] The battery monomers 20 include a shell 21 and a first magnetic member 24, the first magnetic member 24 is arranged on the side of the bottom of the shell 21 facing the outside, and the first magnetic member 24 is a magnetic metal structural member with ferromagnetism.

[0272] The magnetic attraction structure 30 is arranged on the side of the bottom structure 121 facing the containing cavity 101, and the magnetic attraction structure 30 includes a base 31 and a second magnetic member 32 arranged in the base 31, the second magnetic member 32 is a permanent magnet; the second magnetic member 32 is rotationally connected in the base 31, and the second magnetic member 32 is connected to a handle 33, the handle 33 can drive the second magnetic member 32 to rotate in rotation; the base 31 extends along the length direction X of the battery device 100, so that each battery monomer 20 arranged in the length direction X of the battery device 100 can be connected to the same base 31.

[0273] The bottom structure 121 is further provided with limiting members 50, the limiting members 50 are two and are arranged in the width direction Y of the battery device 100, and the limiting members 50 are arranged close to the frame structure, and the battery monomers 20 and the magnetic attraction structure 30 are located between the two limiting members 50; the length direction of the limiting members 50 is parallel to the length direction X of the battery device 100, so as to be opposite to the adjacent battery monomers 20 arranged in the length direction X of the battery device 100.

[0274] In a second aspect, some examples of the present application also provide a power consuming device including the battery device 100 provided by some embodiments of the first aspect. The battery device 100 is used to store or provide electric energy.

[0275] The battery monomer 20 in the battery device 100 can be replaced or repaired individually, thereby reducing the maintenance and replacement cost of the battery device 100, improving the overall service life of the battery device 100, and reducing the use cost of the electric device.

[0276] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; a battery cell accommodated in the box body, the battery cell comprising a shell and a first magnetic member connected to the shell; a magnetic structure connected to the box body, the magnetic structure being magnetically connected to the first magnetic member; the magnetic structure comprises a base connected to the box body; the magnetic structure further comprises a second magnetic member provided in the base, the second magnetic member being magnetically connected to the first magnetic member to magnetically attract the first magnetic member to the base.

2. The battery device according to claim 1, characterized by The second magnetic member is a permanent magnet.

3. The battery device of claim 2, wherein The base is provided with a cavity, and the second magnetic member is accommodated in the cavity; the second magnetic member is movably connected to the base to change the magnetic attraction force of the second magnetic member to the first magnetic member.

4. The battery device of claim 3, wherein The second magnetic member is rotatably connected to the base, the rotation axis of the second magnetic member is parallel to the first magnetic member, and the magnetic poles of the second magnetic member are arranged in a direction perpendicular to the rotation axis.

5. The battery device of claim 3, wherein The magnetic structure further comprises a handle connected to the second magnetic member, the handle is configured to rotate the second magnetic member relative to the base.

6. The battery device of claim 1, wherein The battery device comprises a plurality of battery cells arranged along a first direction; the base extends along the first direction; the second magnetic member extends along the first direction and corresponds to the plurality of battery cells arranged along the first direction to magnetically attract the plurality of battery cells arranged along the first direction to the base.

7. The battery device according to any one of claims 1 to 6, wherein The box body comprises a top structure and a bottom structure spaced apart from the top structure, a receiving cavity is formed between the top structure and the bottom structure, and the battery cell is accommodated in the receiving cavity; the base is provided on the bottom structure.

8. The battery device of claim 7, wherein, The bottom structure is provided with a heat conduction layer on the side facing the receiving cavity, and the heat conduction layer is connected to the magnetic structure.

9. The battery device of claim 8, wherein, The base is provided with a cavity facing the bottom structure, and the second magnetic member is accommodated in the cavity; The second magnetic member is a cylindrical structure with an axis parallel to the bottom structure, one side of the second magnetic member abuts against the base, and the other side of the second magnetic member abuts against the heat conduction layer.

10. The battery device of claim 8, wherein, The bottom structure comprises a plate body, and the plate body is provided with the heat conduction layer on the side facing the receiving cavity; The battery device further comprises a heat exchange assembly provided on the side of the plate body away from the receiving cavity.

11. The battery device of claim 8, wherein, The bottom structure comprises a heat exchange assembly, and the heat conduction layer and the base are provided on the side of the heat exchange assembly facing the receiving cavity.

12. The battery device of claim 8, wherein, The base is provided with a heat conduction layer on the side facing the first magnetic member, and the heat conduction layer is connected to the first magnetic member.

13. The battery device of any one of claims 1-6, wherein, The battery device further comprises a partition structure provided in the box body, the partition structure comprises a partition member movably provided in the box body, and the partition member is configured to move between the first magnetic member and the second magnetic member to hinder the second magnetic member from magnetically attracting the first magnetic member.

14. The battery device of claim 13, wherein, The partition member is a flexible member, and the partition structure further comprises a winding drum rotatably connected to the box body, and the partition member is wound on the winding drum.

15. The battery device of claim 13, wherein, The partition member is a magnetic conductive structure.

16. The battery device of claim 7, wherein, The battery device comprises a heat exchange assembly located in the accommodating cavity and connected to the box body, the magnetic attraction structure is connected to the heat exchange assembly, and a heat conduction layer is arranged between the magnetic attraction structure and the heat exchange assembly.

17. The battery device of any one of claims 1-5, wherein, The first magnetic member is a magnet, and any magnetic pole of the first magnetic member faces the magnetic attraction structure.

18. The battery device of any one of claims 1-5, wherein, The first magnetic member is a ferromagnetic metal structure.

19. The battery device of claim 18, wherein, The first magnetic member is a magnetic conductive structure.

20. The battery device of claim 19, wherein, The first magnetic member is a silicon steel structure or a ferro-nickel alloy structure.

21. The battery device of any one of claims 1-5, wherein, The battery monomer further comprises an insulation structure. The insulation structure is arranged between the shell and the first magnetic member, or the insulation structure is arranged on a side of the first magnetic member facing the magnetic attraction structure.

22. The battery device of any one of claims 1-5, wherein, The battery device further comprises a limiting member connected to the box body, the limiting member is located on at least one side of the magnetic attraction structure, and the height of the limiting member is greater than the height of the magnetic attraction structure.

23. The battery device of claim 22, wherein, The shell comprises a first side and a second side located on the periphery of the shell, the first side and the second side are alternately connected end to end, and the area of the first side is greater than the area of the second side. The limiting member is opposite to the second side.

24. The battery device of claim 23, wherein, The battery device comprises a plurality of battery monomers, the plurality of battery monomers are arranged along a first direction and / or a second direction to form a battery monomer assembly, and the first direction and the second direction are arranged at an angle. The limiting member is arranged on opposite sides of the battery monomer assembly.

25. An electrical device, comprising: The battery device comprises the battery device as claimed in any one of claims 1-24.

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