Battery device, vehicle and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device, a vehicle and a power utilization device.The battery device comprises a box used for being detachably installed on a chassis in the first direction, the box is provided with a containing space, the containing space is of a space structure with an opening in one end, and the opening faces the chassis in the first direction; the battery single body assembly is contained in the containing space, the battery single body assembly comprises a shell assembly and a battery single body contained in the shell assembly, the shell assembly is used for being detachably installed on the chassis in the first direction, and the shell assembly is further detachably connected to the box body; in the technical scheme of the embodiment, the shell assembly of the battery monomer assembly is arranged on the chassis and the box body, and meanwhile, the box body is connected to the chassis, so that the connection stability is improved, and a box cover of the box body is saved; in addition, under the condition that some battery monomers need to be replaced, only the corresponding shell assembly is detached after the box body is detached, the whole battery device does not need to be detached, and the detaching difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device, a vehicle, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] Currently, in order to reduce the space occupied by the battery device in the vehicle, there is a solution that uses the battery device as the vehicle floor. However, this solution is only applicable to certain models of battery devices and is difficult to disassemble and repair. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, a vehicle and an electrical device, which can alleviate the problem that current battery devices are difficult to achieve both small space occupation and easy disassembly.

[0005] In a first aspect, an embodiment of the present application provides a battery device for use in a vehicle, wherein the vehicle includes a chassis, and the battery device includes:

[0006] The box body is used to be detachably mounted on the chassis along a first direction. The box body has a accommodating space. The accommodating space is a spatial structure with an opening at one end, and the opening is directed toward the chassis along the first direction. The battery cell assembly is accommodated in the accommodating space. The battery cell assembly includes a shell assembly and a battery cell accommodated in the shell assembly. The shell assembly is used to be detachably mounted on the chassis along the first direction, and the shell assembly can also be detachably connected to the box body.

[0007] In the technical solution of this embodiment, the shell assembly of the battery cell assembly is installed on the chassis, and the battery cell assembly is connected to the box, and the box is also connected to the chassis. In this arrangement, the box and the battery cell assembly are both connected to the chassis, which increases the connection parts and connection area between the battery device and the chassis, reduces the force on each connection part, and improves the connection stability. The opening is facing the chassis, that is, the chassis can be used as a part of the box of the battery device, saving the box cover and reducing the space occupied by the battery device. At the same time, when some battery cells need to be replaced, only the corresponding shell assembly can be removed after the box is removed, without removing the entire battery device, which reduces the difficulty of disassembly.

[0008] In some embodiments, the shell assembly includes two first plates and two second plates, the two first plates are spaced apart along the second direction, and the two second plates are spaced apart along the third direction, the second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction, the two first plates and the two second plates are alternately connected end to end along the circumference of the battery cell assembly; the shell assembly also includes a connecting structure provided on the second plate, the connecting structure is used to connect to the chassis, and the connecting structure is connected to the box.

[0009] The technical solution of this embodiment provides some specific structures of the housing assembly, so that the housing assembly includes a first plate and a second plate, and the second plate is connected to the chassis, so that the battery cell assembly can be installed on the chassis through the second plate.

[0010] In some embodiments, the connection structure includes a mounting seat, which is connected to the second plate; the connection structure also includes a fastener and a first connecting member, one end of which passes through the box and the mounting seat and is used to connect to the chassis, the fastener is located on the side of the box facing the accommodating space, and the fastener cooperates with the first connecting member.

[0011] The technical solution of this embodiment provides some specific structures of the connection structure, a mounting seat is set on the connection structure, and the connection structure includes a fastener and a first connecting member, so that the box body and the battery cell assembly are both installed on the chassis through the first connecting member, and the first connecting member is fixed by the fastener to improve the stability of the connection.

[0012] In some embodiments, the fastener includes a first fastener and a second fastener, and the first fastener and the second fastener are respectively connected to both sides of the mounting base along the first direction; one end of the first fastener is abutted against the mounting base, and the other end of the first fastener is used to abut against the chassis, one end of the second fastener is abutted against the mounting base, and the other end of the second fastener is abutted against the box.

[0013] The technical solution of this embodiment provides a specific structure of some fasteners, so that the fasteners include a first fastener and a second fastener, so as to fix the first connecting member through the first fastener and the second fastener; at the same time, the first fastener can also provide support and limitation between the chassis and the mounting seat, and the second fastener can also provide support and limitation between the mounting seat and the box body, so that the battery cell assembly can be more stably installed in the box body and can be more stably installed in the chassis.

[0014] In some embodiments, the first fastener is removably connected to the mounting base; and / or the second fastener is removably connected to the mounting base.

[0015] In the technical solution of this embodiment, the first fastener and / or the second fastener are detachable to facilitate replacement of the first fastener and the second fastener, and also enable the battery device to adapt to chassis and housing components of different specifications and models.

[0016] In some embodiments, the connection structure further includes a second connection member, which passes through the mounting seat and is connected to the box.

[0017] The technical solution of this embodiment provides some specific structures of the connection structure, so that the connection structure includes a second connecting member to better fix the battery cell assembly to the box through the second connecting member; at the same time, the second connecting member can also play a role in fixing the battery cell assembly, so that the first connecting member can pass through the box, the mounting seat, the fastener and be connected to the chassis.

[0018] In some embodiments, the housing assembly further includes a reinforcement member connected to a side of the second plate facing away from the battery cell, and the connecting structure is connected to a side of the reinforcement member facing away from the second plate to be indirectly connected to the second plate.

[0019] In the technical solution of this embodiment, a reinforcement is provided on the second plate body to improve the strength of the second plate body; at the same time, the mounting seat is connected to the reinforcement member to provide support for the mounting seat through the reinforcement member, and part of the force borne by the mounting seat can also be shared by the reinforcement member, thereby improving the strength of the mounting seat.

[0020] In some embodiments, the reinforcement member is integrally formed with the second plate.

[0021] In the technical solution of this embodiment, the reinforcement and the second plate are integrally formed to improve the connection strength between the reinforcement and the second plate. At the same time, the second plate and the reinforcement can better share part of the force borne by the mounting seat, thereby improving the strength of the mounting seat.

[0022] In some embodiments, the reinforcement has a cavity therein and a plurality of side walls surrounding the cavity, and at least one of the plurality of side walls is connected to the second plate.

[0023] The technical solution of this embodiment provides some specific structures of the reinforcement members, so that the reinforcement members have cavities therein, so that the reinforcement members can also have buffering capabilities; at the same time, this arrangement can also reduce the weight of the reinforcement members, thereby reducing the weight of the entire battery device and reducing costs.

[0024] In some embodiments, in a direction perpendicular to the second plate body, a size of the side wall connected to the second plate body ranges from 1 mm to 7 mm.

[0025] The technical solution of this embodiment provides some thicknesses of the side walls of the reinforcement, so that the connection portion between the reinforcement and the side wall can have a certain strength, while also reducing the weight of the reinforcement and lowering the cost.

[0026] In some embodiments, the material of the reinforcement is different from the material of the second plate.

[0027] In the technical solution of this embodiment, the material of the reinforcement is different from that of the second plate, so that the reinforcement and the second plate can be made of different materials according to needs, thereby facilitating the satisfaction of different performance requirements of the reinforcement and the second plate.

[0028] In some embodiments, a receiving groove is recessed on a side of the second plate body facing the reinforcement member, and at least a portion of the reinforcement member is received in the receiving groove and connected to the second plate body.

[0029] In the technical solution of this embodiment, a receiving groove is provided on the second plate body to provide positioning for the reinforcement member during the process of connecting the reinforcement member to the second plate body and to facilitate the connection of the reinforcement member to the second plate body.

[0030] In some embodiments, the length direction of the reinforcement is parallel to the length direction of the second plate.

[0031] In the technical solution of this embodiment, the length direction of the reinforcement is parallel to the length direction of the second plate body, so that the force borne on the reinforcement can be transmitted to different parts of the second plate body, so that the reinforcement and the second plate body can better share the force borne on the mounting seat and reduce the risk of stress concentration.

[0032] In some embodiments, the length of the reinforcement member is equal to the length of the second plate body.

[0033] In the technical solution of this embodiment, the length of the reinforcement is equal to the length of the second plate body, so that the entire reinforcement member and the second plate body can share the force borne by the mounting seat, thereby enabling the reinforcement member and the second plate body to better share the force borne by the mounting seat and better reduce the risk of stress concentration.

[0034] In some embodiments, the box includes a frame structure and a bottom plate, the bottom plate is connected to the frame structure along a first direction, the bottom plate and the frame structure enclose a receiving space, the shell assembly is connected to the bottom plate; the frame structure is directly connected to the chassis.

[0035] The technical solution of this embodiment provides some specific structures of the box so that the battery cell assembly can be connected to the bottom plate of the box, and the frame structure can be connected to the chassis, so that the battery cell assembly can be connected to the box, and the box can be connected to the chassis.

[0036] In a second aspect, embodiments of the present application provide a vehicle comprising a battery device according to some embodiments of the first aspect; and a chassis comprising a floor structure, at least a portion of which is connected to the box body and covers the opening of the accommodating space.

[0037] In a third aspect, embodiments of the present application provide an electrical device, including the battery device provided by some embodiments of the first aspect.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0040] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0041] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0042] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0043] Figure 4 A schematic diagram of the exploded structure of a battery device and a chassis provided in some embodiments of the present application;

[0044] Figure 5 A schematic front view of a battery device and a chassis provided in some embodiments of the present application;

[0045] Figure 6 A schematic front view of a battery device provided in some embodiments of the present application;

[0046] Figure 7 A schematic diagram of the exploded structure of a battery cell assembly provided in some embodiments of the present application;

[0047] Figure 8 A three-dimensional schematic diagram of a battery cell assembly provided in some embodiments of the present application installed in a box;

[0048] Figure 9 for Figure 8 A partial enlarged schematic diagram of point A in the middle;

[0049] Figure 10 A schematic diagram of the three-dimensional structure of a second plate provided in some embodiments of the present application;

[0050] Figure 11 A schematic diagram of the exploded structure of the second plate provided in some embodiments of the present application;

[0051] Figure 12 A schematic cross-sectional view of a second plate with a reinforcement member provided in some embodiments of the present application.

[0052] The meanings of the marks in the figure are:

[0053] 1000. Vehicle;

[0054] 100. Battery device;

[0055] 10. Box body; 101. Accommodation space; 11. Bottom plate; 12. Frame structure;

[0056] 20. Battery cell assembly; 21. Housing assembly; 211. First plate; 212. Second plate; 2121. Receiving groove; 213. Connecting structure; 2131. Mounting seat; 2132. Fastener; 2132a. First fastener; 2132b. Second fastener; 2133. First connector; 2134. Second connector; 214. Reinforcement member; 2141. Cavity; 2142. Sidewall; 22. Battery cell; 221. Housing; 222. End cap; 223. Electrode assembly; 224. Electrode terminal;

[0057] 200, motor;

[0058] 300, controller;

[0059] 400, chassis. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0062] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0063] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0065] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0068] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0069] Currently, in order to reduce the space occupied by the battery device, there is a solution to use a portion of the battery device box as the vehicle's floor structure, thereby saving part of the vehicle's floor structure and reducing the space occupied by the battery device.

[0070] In this type of solution, the battery cells of the battery assembly are connected to the housing. To inspect or replace the battery assembly's internal structure, the entire battery assembly must be removed and the housing disassembled. Because the housing is part of the vehicle's floor structure and involves many other components, the battery assembly disassembly process is complex, making disassembly, inspection, and repair difficult.

[0071] Based on the above considerations, in order to alleviate the problem that current battery devices are difficult to achieve both small space occupancy and easy disassembly, an embodiment of the present application provides a battery device, in which the accommodating space of the box is a spatial structure with an opening at one end, and the opening is facing the chassis of the vehicle; the two sides of the battery cell assembly are respectively installed on the chassis and the box, and the box is also installed on the chassis.

[0072] In such a battery device, the chassis of the vehicle can serve as the cover of the box body, saving the box body cover and thus reducing the space occupied by the battery device; at the same time, the battery cell assembly is connected to the chassis. During the inspection and maintenance of the battery device, only the box body can be removed from the chassis and the battery cell assembly, while the battery cell assembly is still suspended on the chassis, which reduces the difficulty of disassembly, inspection and maintenance of the battery device and simplifies the disassembly steps; at the same time, the battery device can also only remove a certain battery cell assembly for replacement without removing all battery cells, further simplifying the disassembly steps and further improving the efficiency of disassembly, inspection and maintenance.

[0073] The battery device disclosed in the embodiments of the present application can be used in various energy storage systems that use the battery device as a power source or use the battery device as an energy storage element. The power device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0074] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0075] refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery is provided inside the vehicle 1000, and the battery may be provided at the bottom, head or tail of the vehicle 1000. The battery may be used to power the vehicle 1000, for example, the battery may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 300 and a motor 200, and the controller 300 is used to control the battery to power the motor 200, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0076] In some embodiments of the present application, the battery can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0077] refer to Figure 2 , Figure 2 This is a schematic diagram of the exploded structure of a battery device 100 provided in some embodiments of the present application. The battery device 100 described in the embodiments of the present application may include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 may include multiple battery cells 22, which are connected in series, parallel, or in parallel via a busbar.

[0078] In some embodiments, the battery cell assembly 20 is generally formed by arranging a plurality of battery cells 22 .

[0079] As an example, the battery cell assembly 20 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 22 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 22 with a cable tie.

[0080] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more battery cell assemblies 20 , wherein the battery cell assemblies 20 are housed in the case 10 .

[0081] As an example, the battery cell assembly 20 may be a battery module, and the battery cell assembly 20 may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0082] As an example, the battery cell assembly 20 may also be housed in the case 10 by directly fixing the plurality of battery cells 22 to the case 10 .

[0083] As an example, the housing 10 may include a first housing 10 and a second housing 10. The first housing 10 and the second housing 10 are engaged to form an enclosed space within the housing 10 for accommodating the battery cell assembly 20. Enclosed herein means covered or closed, and may be sealed or unsealed. The first housing 10 may be a top cover or a bottom plate 11.

[0084] As an example, the box body 10 may include a top cover, a frame, and a bottom plate 11. The top cover and the bottom plate 11 are respectively connected to the frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly 20.

[0085] In some embodiments, the box 10 can be used as part of the chassis 400 structure of the vehicle 1000. For example, part of the box 10 can become at least part of the floor of the vehicle 1000, or part of the box 10 can become at least part of the cross member and longitudinal member of the vehicle 1000.

[0086] refer to Figure 3 , Figure 3 This is a schematic diagram of the exploded structure of a battery cell 22 provided in some embodiments of the present application. A battery cell 22 is the smallest unit that makes up a battery. As shown in the figure, a battery cell 22 includes an end cap 222, a housing 221, an electrode assembly 223, and other functional components.

[0087] The end cap 222 is a component that covers the opening of the housing 221 to isolate the internal environment of the battery cell 22 from the external environment. The shape of the end cap 222 can be adapted to the shape of the housing 221 to fit the housing 221. Optionally, the end cap 222 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 222 from deforming under pressure or collision, providing the battery cell 22 with greater structural strength and improved safety. The end cap 222 can be provided with functional components such as electrode terminals 224. The electrode terminals 224 can be used to electrically connect to the electrode assembly 223 to transmit or receive electrical energy from the battery cell 22. In some embodiments, the end cap 222 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 22 reaches a threshold. The end cap 222 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this is not particularly limited in this embodiment of the present application. In some embodiments, an insulating member may be provided inside the end cap 222 to isolate the electrical connection components in the housing 221 from the end cap 222 to reduce the risk of short circuit. For example, the insulating member may be made of plastic, rubber, or the like.

[0088] The shell 221 is a component used to cooperate with the end cap 222 to form the internal environment of the battery cell 22, wherein the formed internal environment can be used to accommodate the electrode assembly 223, electrolyte and other components. The shell 221 and the end cap 222 can be independent components. An opening can be set on the shell 221, and the internal environment of the battery cell 22 is formed by covering the opening with the end cap 222. Without limitation, the end cap 222 and the shell 221 can also be integrated. Specifically, the end cap 222 and the shell 221 can form a common connection surface before other components are inserted into the shell. When the interior of the shell 221 needs to be encapsulated, the end cap 222 is then covered with the shell 221. The shell 221 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 221 can be determined according to the specific shape and size of the electrode assembly 223. The shell 221 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0089] The electrode assembly 223 is a component in the battery cell 22 where electrochemical reactions occur. One or more electrode assemblies 223 may be contained in the housing 221. The electrode assembly 223 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 223, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals 224 to form a current loop.

[0090] First, reference Figure 4 、 Figure 5 Some embodiments of the present application provide a battery device 100, which is applied to a vehicle 1000, and the vehicle 1000 includes a chassis 400. The battery device 100 includes a housing 10 and a battery cell assembly 20. The housing 10 is configured to be detachably mounted on the chassis 400 along a first direction. The housing 10 has a receiving space 101, which is a spatial structure with an opening at one end, and the opening faces the chassis 400 along the first direction. The battery cell assembly 20 is accommodated in the receiving space 101. The battery cell assembly 20 includes a housing assembly 21 and a battery cell 22 accommodated in the housing assembly 21. The housing assembly 21 is configured to be detachably mounted on the chassis 400 along the first direction, and the housing assembly 21 is further detachably connected to the housing 10.

[0091] In the figure, the direction of the X-axis is the length direction of the battery device 100 , the direction of the Y-axis is the width direction of the battery device 100 , and the direction of the Z-axis is the height direction of the battery device 100 .

[0092] The chassis 400 refers to the load-bearing structure of the vehicle 1000 for supporting the vehicle body, transmitting power, and controlling the driving posture. It may include a frame, a driving system, a transmission system, a steering system, a braking system, etc.

[0093] The box 10 refers to a structure in the battery device 100 for providing a storage space 101 for structures such as the battery cell assembly 20. The box 10 can be a cylindrical structure, a prismatic structure, or a structure of other shapes. The material of the box 10 can include metal, plastic, or other materials.

[0094] The accommodating space 101 refers to the spatial structure in the box body 10 for accommodating the battery cell assembly 20 or other structures. The accommodating space 101 can be a prismatic space, a cylindrical space or a spatial structure of other shapes. The shape of the accommodating space 101 can also be set according to the shape of the box body 10.

[0095] The accommodating space 101 is a spatial structure with an opening at one end, that is, the accommodating space 101 can be connected to the external environment outside the box body 10 at the opening; the opening can be circular, square or other shapes; the opening can only cover a part of the corresponding end of the box body 10, or it can completely cover the corresponding end of the box body 10.

[0096] The box body 10 is detachably mounted on the chassis 400 along a first direction. The box body 10 can be connected to the chassis 400 by screwing, snapping or other means. The first direction can be the height direction Z of the battery device 100 or other directions.

[0097] The opening is directed toward the chassis 400 along a first direction, that is, the chassis 400 covers the opening of the accommodating space 101. At this time, the chassis 400 can serve as the lid of the box body 10 to close the opening of the accommodating space 101; for example, a part of the floor structure of the chassis 400 can cover the opening of the accommodating space 101.

[0098] The battery cell assembly 20 refers to a structure formed by the arrangement of battery cells 22. The battery cell 22 refers to the smallest unit that constitutes the battery device 100. The number of battery cells 22 in the battery cell assembly 20 can be one, or two or more. When the number of battery cells 22 is two or more, the battery cells 22 in the battery cell assembly 20 can be connected in series, in parallel, or in mixed series; the battery cells 22 in the battery cell assembly 20 can be arranged in one direction or in an array along two different directions.

[0099] The shell assembly 21 refers to the structure in the battery cell assembly 20 used to constrain and fix the battery cell 22. The shell assembly 21 may include a plate structure, a frame structure or other structures; the shell assembly 21 may be located only on both sides of each battery cell 22, or on the surrounding side of each battery cell 22, or even completely wrap each battery cell 22; the material of the shell assembly 21 may include metal, plastic or other materials.

[0100] The outer shell assembly 21 can enclose an internal space to accommodate the battery cell 22, that is, the battery cell 22 can be accommodated in the internal space enclosed by the outer shell assembly 21; the internal space can be a prismatic space structure or a space structure of other shapes; when the battery cell 22 is accommodated in the internal space, the battery cell assembly 20 can be connected to the outer shell assembly 21 by bonding, screwing, snapping, etc., or it can only be in contact with the outer shell assembly 21 without mechanical connection; the internal space enclosed by the outer shell assembly 21 can accommodate one battery cell 22, or two or more battery cells 22, and multiple battery cells 22 can be arranged in one direction or in an array along two different directions.

[0101] The shell assembly 21 is used to be detachably installed on the chassis 400 along a first direction. The shell assembly 21 can be connected to the chassis 400 by screwing, snapping or other means; when the box body 10 is installed on the chassis 400, the shell assembly 21 is also installed on the chassis 400. At this time, there are more connection parts between the battery device 100 and the chassis 400. Each connection part can better share the gravity or other forces of the battery device 100, thereby reducing the force on a single connection part and improving the stability and life of each connection part.

[0102] The shell assembly 21 can also be detachably connected to the box body 10. The shell assembly 21 can be connected to the box body 10 by screwing, snapping or other means. At this time, part of the box body 10 is installed on the chassis 400, and the other part is indirectly connected to the chassis 400 through the shell assembly 21; this setting can not only improve the connection stability between the box body 10 and the chassis 400, but also better fix the box body 10, the battery cell assembly 20 and the chassis 400.

[0103] For example, when the battery device 100 needs to be repaired, the connection structure between the battery cell assembly 20 and the box 10 can be removed, and the connection structure between the box 10 and the chassis 400 can be removed, and the box 10 can be removed from the chassis 400. At this time, the battery cell assembly 20 is still installed on the chassis 400, so the overall weight of the box 10 is lighter and the disassembly process is easier; and when a certain battery cell 22 needs to be repaired or replaced, only the corresponding battery cell assembly 20 needs to be removed, which simplifies the disassembly and repair steps.

[0104] If only the housing 10 of the battery assembly 100 is mounted on the chassis 400, the battery assembly 100 is susceptible to resonance with the chassis 400 while the vehicle 1000 is in motion. This resonance can damage the connection structure between the housing 10 and the chassis 400 and reduce the life of the connection structure between the housing 10 and the chassis 400. Therefore, a portion of the housing 10 is mounted on the chassis 400, while the other portion is indirectly connected to the chassis 400 via the housing assembly 21. This reduces the risk of resonance between the battery assembly 100 and the chassis 400 and improves the stability of the connection between the battery assembly 100 and the chassis 400.

[0105] In this embodiment, the shell assembly 21 of the battery cell assembly 20 is installed on the chassis 400, and the battery cell assembly 20 is connected to the box 10, and the box 10 is also connected to the chassis 400. In this arrangement, the box 10 and the battery cell assembly 20 are both connected to the chassis 400, which increases the connection parts and connection area between the battery device 100 and the chassis 400, reduces the force on each connection part, and improves the connection stability. The opening faces the chassis 400, that is, the chassis 400 can serve as a part of the box 10 of the battery device 100, eliminating the box cover of the box 10 and reducing the space occupied by the battery device 100. At the same time, when some battery cells 22 need to be replaced, only the corresponding shell assembly 21 can be removed after the box 10 is removed, without removing the entire battery device 100, thereby reducing the difficulty of disassembly.

[0106] refer to Figures 4 to 7 In some embodiments, the shell assembly 21 includes two first plates 211 and two second plates 212, the two first plates 211 are arranged at intervals along the second direction, and the two second plates 212 are arranged at intervals along the third direction, the second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction, the two first plates 211 and the two second plates 212 are alternately connected end to end along the circumference of the battery cell assembly 20; the shell assembly 21 also includes a connecting structure 213 provided on the second plate 212, the connecting structure 213 is used to connect to the chassis 400, and the connecting structure 213 is connected to the box body 10.

[0107] The first plate 211 is a structure in the housing assembly 21 for constraining the battery cell 22. The first plate 211 can be a square plate, or a circular plate, or a plate of other shapes. The first plate 211 can be supported by adjacent battery cells 22, or can be connected to adjacent battery cells 22. The material of the first plate 211 can include metal, plastic, or other materials. For example, the first plate 211 is a rectangular plate.

[0108] Similar to the first plate 211, the second plate 212 is a structure in the housing assembly 21 for constraining the battery cell 22. The second plate 212 can be a square plate, or a circular plate, or a plate of other shapes; the second plate 212 can be supported by adjacent battery cells 22, or can be connected to adjacent battery cells 22; the material of the second plate 212 can include metal, plastic or other materials; for example, the second plate 212 is a rectangular plate.

[0109] There are two first plates 211 and two second plates 212. The two first plates 211 are spaced apart along the second direction, and the two second plates 212 are spaced apart along the third direction. The first plates 211 and the second plates 212 are alternately connected end to end around the sides of the battery cell assembly 20. In this case, the first plates 211 and the second plates 212 can form a frame-like structure, and the internal space enclosed by the first plates 211 and the second plates 212 is a quadrangular prism-shaped spatial structure. The first plate 211 can be connected to the second plate 212 by welding, bonding, or other means. For example, the first plates 211 and the second plates 212 are alternately connected end to end to form a frame-like structure, and the internal space enclosed by the first plates 211 and the second plates 212 is a rectangular parallelepiped-shaped spatial structure. The first plates 211 and the second plates 212 both abut against adjacent battery cells 22 to constrain each battery cell 22 by pressing.

[0110] The second direction and the third direction are both perpendicular to the first direction. When the first direction is the height direction Z of the battery device 100, the second direction can be the width direction Y of the battery device 100 or the length direction X of the battery device 100. Correspondingly, the third direction can be the length direction X of the battery device 100 or the width direction Y of the battery device 100; so that the first plate 211 and the second plate 212 can be located on the peripheral side of the battery cell assembly 20.

[0111] For example, the first plate 211 is an end plate of the battery cell assembly 20 , and the second plate 212 is a side plate of the battery cell assembly 20 .

[0112] The connecting structure 213 refers to the structure in the outer shell assembly 21 used to connect the battery cell assembly 20 to the box body 10 and the chassis 400. The connecting structure 213 may include bolts, snaps or other structures; the connecting structure 213 is provided on the second plate body 212, and the connecting structure 213 can be connected to the second plate body 212 by bonding, welding, screwing or other means; when there are two second plate bodies 212, there can be two connecting structures 213 and they are respectively connected to the two second plate bodies 212, or there can be only one connecting structure 213 and it is connected to a certain second plate body 212.

[0113] The connection structure 213 may include only one connector or two or more different connectors. The connection between the battery cell assembly 20 and the box body 10 and the chassis 400 may be achieved through one connector or two different connectors.

[0114] This embodiment provides some specific structures of the housing assembly 21, so that the housing assembly 21 includes a first plate 211 and a second plate 212, and the second plate 212 is connected to the chassis 400, so that the battery cell assembly 20 can be installed on the chassis 400 through the second plate 212.

[0115] refer to Figures 4 to 8 In some embodiments, the connection structure 213 includes a mounting seat 2131, which is connected to the second plate 212; the connection structure 213 also includes a fastener 2132 and a first connecting member 2133, one end of the first connecting member 2133 passes through the box body 10 and the mounting seat 2131, and is used to connect to the chassis 400, the fastener 2132 is located on the side of the box body 10 facing the accommodating space 101, and the fastener 2132 cooperates with the first connecting member 2133.

[0116] The mounting seat 2131 refers to a structure in the connecting structure 213 used to provide a mounting base for other structures. The mounting seat 2131 can be a plate-like structure, a columnar structure or a structure of other shapes. The shape of the mounting seat 2131 can be circular, polygonal or other shapes; the mounting seat 2131 is connected to the second plate body 212, and the mounting seat 2131 can be connected to the second plate body 212 by bonding, welding, screwing or other means; the number of mounting seats 2131 can be one, or two or more; the material of the mounting seat 2131 can include metal, plastic or other materials.

[0117] The first connecting member 2133 refers to the structure in the connecting structure 213 used to connect the box body 10, the mounting base 2131 and the chassis 400. The first connecting member 2133 can be a bolt, or a rivet or other connecting member; the connecting structure 213 can include only one first connecting member 2133, or it can include two or more first connecting members 2133; the material of the first connecting member 2133 can include metal, plastic or other materials; it can be understood that when the connecting structure 213 includes the first connecting member 2133, the connecting structure 213 can also include other structures.

[0118] One end of the first connector 2133 passes through the box body 10, the mounting seat 2131 and is connected to the chassis 400 to connect the box body 10 and the battery cell assembly 20 to the chassis 400; when the number of first connectors 2133 is two or more, the first connectors 2133 can correspond to the mounting seat 2131 one by one, or two or more first connectors 2133 can pass through the same mounting seat 2131.

[0119] Because the box body 10 is mounted on the chassis 400 along the first direction with the mounting seat 2131, that is, the box body 10 and the mounting seat 2131 are located on one side of the chassis 400 along the first direction, at this time, one end of the first connecting member 2133 also passes through the box body 10 and the mounting seat 2131 along the first direction and is connected to the chassis 400. At this time, the length direction of the first connecting member 2133 can be parallel to the first direction.

[0120] For example, the first connecting member 2133 is a bolt. In this case, threaded holes corresponding to the first connecting member 2133 can be provided on the box body 10 and the mounting base 2131, so that the first connecting member 2133 can not only pass through the box body 10 and the mounting base 2131, but also be connected to the box body 10 and the mounting base 2131 by a threaded connection; accordingly, the chassis 400 has a threaded hole corresponding to the first connecting member 2133 to threadably cooperate with the first connecting member 2133.

[0121] Fastener 2132 refers to a structure in the connecting structure 213 used to cooperate with the first connecting member 2133. Depending on the structure of the first connecting member 2133, the fastener 2132 can be a nut, a threaded sleeve, or a snap or other fastener 2132; the number of fasteners 2132 can be one, or two or more. The number of fasteners 2132 can be set according to the number of first connecting members 2133. One first connecting member 2133 can correspond to one fastener 2132, or two or more fasteners 2132; the material of the fastener 2132 can include metal, plastic or other materials.

[0122] The fastener 2132 is located on the side of the box 10 facing the accommodating space 101. At this time, the fastener 2132 can be located between the mounting seat 2131 and the box 10, or on the side of the mounting seat 2131 facing the chassis 400, or different parts of the fastener 2132 can be located on both sides of the mounting seat 2131.

[0123] For example, when the first connecting member 2133 is a bolt, the fastener 2132 can be a nut. The fastener 2132 can be located between the box body 10 and the mounting base 2131 and abut against the box body 10. The first connecting member 2133 passes through the fastener 2132 and is threadedly engaged with it to fix the relative position of the box body 10 and the first connecting member 2133; the fastener 2132 can also be located on both sides of the mounting base 2131 and abut against the mounting base 2131 respectively. The first connecting member 2133 passes through the mounting base 2131 and is threadedly engaged with the first connecting members 2133 on both sides of the mounting base 2131 to fix the position of the battery cell assembly 20.

[0124] This embodiment provides some specific structures of the connection structure 213, a mounting seat 2131 is set on the connection structure 213, and the connection structure 213 includes a fastener 2132 and a first connection member 2133, so that the box body 10 and the battery cell assembly 20 are both installed on the chassis 400 through the first connection member 2133, and the first connection member 2133 is fixed by the fastener 2132 to improve the stability of the connection.

[0125] refer to Figure 6 、 Figure 8 、 Figure 9 In some embodiments, the fastener 2132 includes a first fastener 2132a and a second fastener 2132b, and the first fastener 2132a and the second fastener 2132b are respectively connected to both sides of the mounting base 2131 along the first direction; one end of the first fastener 2132a is abutted against the mounting base 2131, and the other end of the first fastener 2132a is used to abut the chassis 400, one end of the second fastener 2132b is abutted against the mounting base 2131, and the other end of the second fastener 2132b is abutted against the box 10.

[0126] The first fastener 2132a and the second fastener 2132b are both partial structures in the fastener 2132. The first fastener 2132a and the second fastener 2132b are respectively located on both sides of the mounting base 2131 along the first direction, that is, the first fastener 2132a is located on the side of the mounting base 2131 facing the chassis 400, and the second fastener 2132b is located on the side of the mounting base 2131 facing the box 10.

[0127] One end of the first fastener 2132a is abutted against the mounting seat 2131, and the other end is abutted against the chassis 400. After the first connecting member 2133 passes through the first fastener 2132a and cooperates with the first fastener 2132a, the first fastener 2132a can limit the relative position between the mounting seat 2131 and the chassis 400, so as to limit the relative position between the battery cell assembly 20 and the chassis 400, and can provide support for the mounting seat 2131.

[0128] One end of the second fastener 2132b is abutted against the mounting seat 2131, and the other end is abutted against the box body 10. After the first connecting member 2133 passes through the second fastener 2132b and cooperates with the second fastener 2132b, the second fastener 2132b can limit the relative position between the mounting seat 2131 and the box body 10, so as to limit the relative position between the battery cell assembly 20 and the box body 10, and can provide support for the mounting seat 2131 and the box body 10.

[0129] Under the restriction and support of the first fastener 2132 a and the second fastener 2132 b , the relative positions of the box 10 , the battery cell assembly 20 and the chassis 400 in the first direction are fixed, so that the battery device 100 can be stably connected to the chassis 400 .

[0130] It can be understood that since the battery cell assembly 20 has a certain size in the first direction, there is a certain distance between the mounting base 2131 and the box body 10, and between the mounting base 2131 and the chassis 400. The first fastener 2132a and the second fastener 2132b should also have a certain size in the first direction. At this time, the first fastener 2132a can be a sleeve-shaped structure; for example, the first connecting member 2133 is a bolt, and the first fastener 2132a and the second fastener 2132b are both threaded sleeves.

[0131] This embodiment provides some specific structures of the fasteners 2132, so that the fasteners 2132 include a first fastener 2132a and a second fastener 2132b, so as to fix the first connecting member 2133 through the first fastener 2132a and the second fastener 2132b; at the same time, the first fastener 2132a can also provide support and limitation between the chassis 400 and the mounting seat 2131, and the second fastener 2132b can also provide support and limitation between the mounting seat 2131 and the box body 10, so that the battery cell assembly 20 can be more stably installed in the box body 10, and can be more stably installed in the chassis 400.

[0132] In some embodiments, the first fastener 2132a is detachably connected to the mounting base 2131 ; and / or the second fastener 2132b is detachably connected to the mounting base 2131 .

[0133] The first fastener 2132a is detachably connected to the mounting base 2131, and the first fastener 2132a can be detachably connected to the mounting base 2131 by snapping, screwing or other means; the second fastener 2132b is detachably connected to the mounting base 2131, and the second fastener 2132b can be detachably connected to the mounting base 2131 by snapping, screwing or other means.

[0134] Before the first connecting member 2133 passes through the first fastener 2132a and the second fastener 2132b, the first fastener 2132a and the second fastener 2132b can be installed on both sides of the mounting seat 2131 respectively, so that the first connecting member 2133 can pass through the first fastener 2132a and the second fastener 2132b and cooperate with them.

[0135] The relative position of the mounting base 2131 relative to the second plate 212 can vary for different battery cell assemblies 20. In this case, the spacing between the mounting base 2131 and the chassis 400, and between the mounting base 2131 and the housing 10, can also vary. Consequently, the required lengths of the first fastener 2132a and the second fastener 2132b can also vary. Accordingly, the first fastener 2132a and the second fastener 2132b are made detachable, allowing them to be replaced with different sizes to accommodate different battery cell assembly 20 installation requirements.

[0136] In this embodiment, the first fastener 2132a and / or the second fastener 2132b are detachable to facilitate replacement of the first fastener 2132a and the second fastener 2132b, and also enable the battery device 100 to adapt to chassis 400 and housing components 21 of different specifications and models.

[0137] refer to Figure 4 In some embodiments, the connection structure 213 further includes a second connection member 2134 , which passes through the mounting seat 2131 and is connected to the box body 10 .

[0138] The second connecting member 2134 refers to the structure in the connecting structure 213 used to connect the box body 10 and the mounting base 2131. The second connecting member 2134 can be a bolt, or a rivet or other connecting member; the connecting structure 213 can include only one second connecting member 2134, or it can include two or more second connecting members 2134; the material of the second connecting member 2134 can include metal, plastic or other materials; it can be understood that when the connecting structure 213 includes the first connecting member 2133 and the second connecting member 2134, the connecting structure 213 can also include other structures.

[0139] One end of the second connector 2134 passes through the mounting seat 2131 and is connected to the box body 10 to connect the battery cell assembly 20 to the box body 10; when the number of second connectors 2134 is two or more, the second connectors 2134 can correspond one-to-one to the mounting seat 2131, or two or more second connectors 2134 can pass through the same mounting seat 2131.

[0140] Because the box body 10 is mounted on the chassis 400 along the first direction with the mounting seat 2131, that is, the box body 10 and the mounting seat 2131 are located on one side of the chassis 400 along the first direction, at this time, one end of the second connecting member 2134 also passes through the mounting seat 2131 along the first direction and is connected to the box body 10. At this time, the length direction of the second connecting member 2134 can be parallel to the first direction.

[0141] For example, the second connecting member 2134 is a bolt. In this case, threaded holes corresponding to the second connecting member 2134 can be provided on the box body 10 and the mounting base 2131, so that the second connecting member 2134 can pass through the mounting base 2131 and can also be connected to the box body 10 and the mounting base 2131 by threaded connection.

[0142] When the connection structure 213 includes a first connector 2133 and a second connector 2134, the battery cell assembly 20 can be first installed on the box body 10 through the second connector 2134, and then the box body 10 and the battery cell assembly 20 can be installed on the chassis 400 through the first connector 2133; in this process, the second connector 2134 can play the role of pre-fixing the battery cell assembly 20.

[0143] The second connecting member 2134 can also share the force borne by the battery cell assembly 20 and the box body 10, so as to further reduce the force borne by the connection parts between each first connecting member 2133 and the mounting seat 2131, and each first connecting member 2133 and the box body 10, thereby better improving the connection stability and connection life between the battery device 100 and the chassis 400.

[0144] This embodiment provides some specific structures of the connection structure 213, so that the connection structure 213 includes a second connection member 2134, so that the battery cell assembly 20 can be better fixed to the box body 10 through the second connection member 2134; at the same time, the second connection member 2134 can also play a role in fixing the battery cell assembly 20, so that the first connection member 2133 passes through the box body 10, the mounting seat 2131, the fastener 2132 and is connected to the chassis 400.

[0145] refer to Figures 7 to 10 In some embodiments, the housing assembly 21 further includes a reinforcement 214 , which is connected to a side of the second plate 212 facing away from the battery cell 22 , and the connection structure 213 is connected to a side of the reinforcement 214 facing away from the second plate 212 to be indirectly connected to the second plate 212 .

[0146] The reinforcement member 214 is a structure used to increase the strength of the housing assembly 21. The reinforcement member 214 may be a strip-shaped structure, or a plate-shaped structure, or a columnar structure. The reinforcement member 214 is provided on the second plate 212 to increase the strength of the second plate 212. The reinforcement member 214 may be connected to the second plate 212 by bonding, welding, screwing, or other means. The reinforcement member 214 may also be integrally formed with the second plate 212. The number of reinforcement members 214 may be one, or two or more.

[0147] The reinforcement member 214 may be made of metal, plastic or other materials.

[0148] The reinforcement 214 is connected to the side of the second plate 212 facing away from the battery cell 22 , that is, the reinforcement 214 is located on the side of the second plate 212 facing outside the battery cell assembly 20 to reduce possible damage to the battery cell 22 caused by the reinforcement 214 .

[0149] The connecting structure 213 is connected to the side of the reinforcement 214 facing away from the second plate body 212, that is, the connecting structure 213 is connected to the outer side of the reinforcement 214. The connecting structure 213 can be connected to the reinforcement 214 by bonding, welding, screwing or other means; when the connecting structure 213 includes a mounting seat 2131, the mounting seat 2131 is connected to the reinforcement 214. When the number of mounting seats 2131 is two or more, multiple mounting seats 2131 can be connected to the same reinforcement 214 or to different reinforcements 214.

[0150] The connecting structure 213 can be indirectly connected to the second plate body 212 through the reinforcement 214. The reinforcement 214 can share part of the force borne by the mounting seat 2131 to improve the strength of the mounting seat 2131. At the same time, the reinforcement 214 can also improve the connection strength between the connecting structure 213 and the second plate body 212 and improve the connection stability.

[0151] In this embodiment, a reinforcement 214 is provided on the second plate body 212 to improve the strength of the second plate body 212; at the same time, the mounting seat 2131 is connected to the reinforcement 214 to provide support for the mounting seat 2131 through the reinforcement 214, and part of the force borne by the mounting seat 2131 can also be shared by the reinforcement 214, thereby improving the strength of the mounting seat 2131.

[0152] refer to Figures 8 to 10 In some embodiments, the reinforcement member 214 and the second plate body 212 are integrally formed.

[0153] One-piece molding refers to a process in which molten, plastic material (such as metal, plastic, composite material, etc.) is injected into a mold cavity and molded into a part of the desired shape in one go. One-piece molding includes die casting, injection molding or other one-piece molding methods.

[0154] The reinforcement 214 and the second plate body 212 are integrally formed, which can improve the connection strength and connection stability between the reinforcement 214 and the second plate body 212, and can improve the overall strength of the structure. It can also save the connecting parts between the reinforcement 214 and the second plate body 212 and can improve production efficiency.

[0155] In this embodiment, the reinforcement 214 and the second plate 212 are integrally formed to improve the connection strength between the reinforcement 214 and the second plate 212. At the same time, the second plate 212 and the reinforcement 214 can better share part of the force borne by the mounting seat 2131, thereby improving the strength of the mounting seat 2131.

[0156] refer to Figures 10 to 12 In some embodiments, the reinforcement member 214 has a cavity 2141 therein and a plurality of side walls 2142 surrounding the cavity 2141 , and at least one of the plurality of side walls 2142 is connected to the second plate 212 .

[0157] Cavity 2141 refers to a spatial structure formed in the reinforcement 214. Cavity 2141 can be a prismatic spatial structure, a cylindrical spatial structure, or a spatial structure of other shapes. The shape of cavity 2141 can also be set according to the shape of reinforcement 214. The number of cavities 2141 can be one, two, or more.

[0158] When there is a cavity 2141 in the reinforcement 214, the reinforcement 214 also has side walls 2142 that enclose the cavity 2141. Each side wall 2142 can enclose the cavity 2141. At this time, the side wall 2142 has a side facing the cavity 2141 and also has a side facing the external environment of the reinforcement 214. According to the shape of the cavity 2141, the side wall 2142 can be a flat plate structure or an arc-shaped plate structure. The shape of the side wall 2142 can be rectangular, circular or other shapes.

[0159] At least one of the multiple side walls 2142 is connected to the second plate body 212. Depending on the shape of the reinforcement 214, the number of side walls 2142 connected to the second plate body 212 can be one, two or more; the side wall 2142 is connected to the second plate body 212 on the side facing the external environment of the reinforcement 214. Depending on the way the reinforcement 214 is connected to the second plate body 212, the side wall 2142 can be connected to the second plate body 212 by welding, bonding or other means.

[0160] The setting of the cavity 2141 enables the reinforcement 214 to have the ability to deform and absorb external impact, thereby improving the protection ability of the second plate 212 to the battery cell 22; at the same time, the setting of the cavity 2141 can also reduce the overall weight of the reinforcement 214 and reduce the cost of the reinforcement 214.

[0161] This embodiment provides some specific structures of the reinforcement member 214, so that the reinforcement member 214 has a cavity 2141, so that the reinforcement member 214 can also have a buffering capacity; at the same time, this arrangement can also reduce the weight of the reinforcement member 214, thereby reducing the weight of the entire battery device 100 and reducing costs.

[0162] refer to Figures 10 to 12 In some embodiments, in a direction perpendicular to the second plate body 212 , a size of the side wall 2142 connected to the second plate body 212 ranges from 1 mm to 7 mm.

[0163] The dimension of the side wall 2142 connected to the second plate 212 in the direction perpendicular to the second plate 212 refers to the thickness of the side plate, that is, Figure 12 As shown in the dimension H, the thickness of the side wall 2142 ranges from 1 mm to 7 mm. For example, the thickness of the side wall 2142 can be 1 mm, 3 mm, 4 mm, 5 mm, 7 mm or other values.

[0164] The thickness of the side wall 2142 reflects the connection strength between the reinforcement 214 and the second plate body 212. The greater the thickness of the side wall 2142, the stronger the strength of the connection between the reinforcement 214 and the second plate body 212. At the same time, the smaller the volume of the accommodating space 101, the greater the overall weight of the reinforcement 214.

[0165] For example, the thickness of the side wall 2142 can be 1 mm. In this case, the thickness of the side wall 2142 is thinner, the volume of the cavity 2141 is larger, the deformation ability of the reinforcement 214 is stronger, the ability to absorb external impact is stronger, and the weight is lighter and the cost is lower.

[0166] For example, the thickness of the side wall 2142 can be 4 mm. At this time, the thickness of the side wall 2142 is moderate. The reinforcement 214 has the ability to deform to absorb external impact, and can also make the connection between the reinforcement 214 and the second plate body 212 stronger. At the same time, it can also reduce the weight of the reinforcement 214 and reduce the cost of the reinforcement 214.

[0167] For example, the thickness of the side wall 2142 may be 7 mm. In this case, the thickness of the side wall 2142 is thicker, and the strength of the connection portion between the reinforcement 214 and the second plate 212 is stronger.

[0168] Regarding the thickness of the side wall 2142, when the cavity 2141 is connected to the space outside the reinforcement 214, it can be directly measured by a device such as a vernier caliper. When the cavity 2141 is a closed space structure, the reinforcement 214 can be cut first and then measured by a device such as a vernier caliper.

[0169] This embodiment provides some thicknesses of the side walls 2142 of the reinforcement 214 so that the connection portion between the reinforcement 214 and the side walls 2142 has a certain strength, while also reducing the weight of the reinforcement 214 and lowering the cost.

[0170] In some embodiments, the material of the reinforcement member 214 is different from the material of the second plate 212 .

[0171] The material of the reinforcement 214 may be different from that of the second plate 212 . According to different performance requirements of the second plate 212 and the reinforcement 214 , the materials of the reinforcement 214 and the second plate 212 may be different, so that different materials can be selected according to different requirements.

[0172] For example, the material of the second plate 212 may include steel, so that the second plate 212 can have higher strength, thereby better restraining the battery cell 22 and suppressing the deformation of the battery cell 22; the material of the reinforcement 214 may be aluminum alloy, so that the reinforcement 214 can have higher tensile strength, thereby reducing the risk of the force applied by the mounting seat 2131 to the reinforcement 214 causing the reinforcement 214 to deform and detach from the second plate 212.

[0173] In this embodiment, the material of the reinforcement 214 is different from that of the second plate 212, so that the reinforcement 214 and the second plate 212 can be made of different materials according to needs, thereby facilitating meeting the different performance requirements of the reinforcement 214 and the second plate 212.

[0174] refer to Figure 10 、 Figure 11 In some embodiments, a receiving groove 2121 is recessed on a side of the second plate 212 facing the reinforcement 214 , and at least a portion of the reinforcement 214 is received in the receiving groove 2121 and connected to the second plate 212 .

[0175] The accommodating groove 2121 is a groove-shaped structure that is recessed into the second plate body 212. The accommodating groove 2121 is provided on the side of the second plate body 212 facing the reinforcement 214 to facilitate accommodating the reinforcement 214. The shape of the accommodating groove 2121 can be the same as the shape of the reinforcement 214 to facilitate accommodating the reinforcement 214. The shape of the accommodating groove 2121 can also be different from the reinforcement 214. The depth of the accommodating groove 2121 can be greater than or equal to the thickness of the reinforcement 214 to fully accommodate the reinforcement 214. The depth of the accommodating groove 2121 can also be less than the thickness of the reinforcement 214 to accommodate part of the reinforcement 214. The number of accommodating grooves 2121 can be one, or two or more. The number of accommodating grooves 2121 can also be set according to the number of reinforcements 214.

[0176] At least a portion of the reinforcement member 214 is accommodated in the accommodation groove 2121 . The reinforcement member 214 may be completely accommodated in the accommodation groove 2121 , or may be only partially accommodated in the accommodation groove 2121 .

[0177] The reinforcement 214 is connected to the second plate body 212. When at least part of the reinforcement 214 is accommodated in the accommodating groove 2121, the reinforcement 214 can be connected to the bottom surface of the accommodating groove 2121 or to the side surface of the accommodating groove 2121. The reinforcement 214 can be connected to the bottom surface of the accommodating groove 2121 by welding, bonding or other means.

[0178] Before the reinforcement 214 is connected to the second plate 212 , the reinforcement 214 may be installed in the receiving groove 2121 to assist in fixing the reinforcement 214 through the receiving groove 2121 , so as to facilitate subsequent welding or bonding operations.

[0179] The setting of the accommodating groove 2121 can also enable at least part of the connection part between the reinforcement 214 and the second plate body 212 to be located within the accommodating groove 2121, so as to protect the connection part between the reinforcement 214 and the second plate body 212 and reduce the risk of damage to the connection part between the reinforcement 214 and the second plate body 212.

[0180] In this embodiment, a receiving groove 2121 is provided on the second plate 212 to provide positioning for the reinforcement 214 during connection of the reinforcement 214 to the second plate 212 and facilitate connection of the reinforcement 214 to the second plate 212 .

[0181] refer to Figure 10 、 Figure 11 In some embodiments, the length direction of the reinforcement member 214 is parallel to the length direction of the second plate 212 .

[0182] The length direction of the reinforcement 214 is parallel to the length direction of the second plate 212 . When the length direction of the second plate 212 is parallel to the length direction X of the battery device 100 , the length direction of the reinforcement 214 is also parallel to the length direction X of the second plate 212 .

[0183] This arrangement enables the reinforcement 214 to have a longer length, and the longer the length of the reinforcement 214, the larger the connection area between the reinforcement 214 and the second plate body 212, the higher the strength of the connection part between the reinforcement 214 and the second plate body 212, and the better the connection stability; at the same time, the longer the length of the reinforcement 214, the more evenly the reinforcement 214 can transfer the force it bears to the second plate body 212, thereby improving the strength of the reinforcement 214, and then improving the strength of the mounting seat 2131.

[0184] In this embodiment, the length direction of the reinforcement 214 is parallel to the length direction of the second plate 212, so that the force borne on the reinforcement 214 can be transmitted to different parts of the second plate 212, so that the reinforcement 214 and the second plate 212 can better share the force borne on the mounting seat 2131 and reduce the risk of stress concentration.

[0185] refer to Figure 10 、 Figure 11 In some embodiments, the length of the reinforcement member 214 is equal to the length of the second plate 212 .

[0186] The length of the reinforcement 214 is equal to the length of the second plate 212. At this time, the length of the reinforcement 214 is longer, the connection area between the reinforcement 214 and the second plate 212 is larger, and the reinforcement 214 can be more stably connected to the second plate 212, and the connection stability is better.

[0187] The length of the reinforcement 214 is equal to the length of the second plate 212 , and the reinforcement 214 can better transfer the force it bears to the second plate 212 more evenly, thereby improving the strength of the reinforcement 214 and further improving the strength of the mounting base 2131 .

[0188] In this embodiment, the length of the reinforcement 214 is equal to the length of the second plate 212, so that the entire reinforcement 214 and the second plate 212 can share the force borne by the mounting seat 2131, thereby enabling the reinforcement 214 and the second plate 212 to better share the force borne by the mounting seat 2131 and better reduce the risk of stress concentration.

[0189] refer to Figures 4 to 6In some embodiments, the box body 10 includes a frame structure 12 and a bottom plate 11. The bottom plate 11 is connected to the frame structure 12 along a first direction. The bottom plate 11 and the frame structure 12 form a receiving space 101. The shell assembly 21 is connected to the bottom plate 11; the frame structure 12 is directly connected to the chassis 400.

[0190] The frame structure 12 refers to a structure in the box body 10 used to provide side protection for the battery cell assembly 20. The frame structure 12 may include multiple side beams connected end to end. The frame structure 12 may be a quadrilateral square frame structure, or a pentagonal, hexagonal or other shaped frame structure; the beam body in the frame structure 12 may be a box beam, or an I-beam or other shaped beam structure; the material of the frame structure 12 may include metal, plastic or other materials.

[0191] The bottom plate 11 refers to the structure in the box 10 used to support the battery cell assembly 20 or other structures. The bottom plate 11 can be a circular plate structure, a square plate structure or a plate structure of other shapes; the bottom plate 11 is connected to the frame structure 12. The bottom plate 11 can be connected to the frame structure 12 by welding, bonding, screwing or other methods. The bottom plate 11 can also be integrally formed with the frame structure 12; the material of the bottom plate 11 can include metal, plastic or other materials. The material of the bottom plate 11 can be the same as or different from the material of the frame structure 12.

[0192] The bottom plate 11 and the frame structure 12 can enclose a storage space 101 with an open end. At this time, the storage space 101 is the spatial structure inside the box body 10, and the battery cell assembly 20 or other structures are accommodated in the storage space 101; the bottom plate 11 is connected to the frame structure 12 along the first direction, so that the opening of the storage space 101 can be in the first direction and opposite to the bottom plate 11.

[0193] The housing assembly 21 is connected to the bottom plate 11, meaning that the bottom plate 11 can be indirectly connected to the chassis 400 via the housing assembly 21; the frame structure 12 is directly connected to the chassis 400, and the frame structure 12 can be connected to the chassis 400 by screwing, clamping, or other means. In this case, the frame structure 12 of the box body 10 is directly connected to the chassis 400, and the bottom plate 11 is indirectly connected to the chassis 400 via the housing assembly 21. The housing assembly 21 is also connected to the chassis 400. This results in more connection points between the battery device 100 and the chassis 400, greater connection stability, less force on a single connection point, and improved lifespan and stability of the connection points.

[0194] This embodiment provides some specific structures of the box body 10 so that the battery cell assembly 20 can be connected to the bottom plate 11 of the box body 10, and the frame structure 12 can be connected to the chassis 400, so that the battery cell assembly 20 can be connected to the box body 10, and the box body 10 can be connected to the chassis 400.

[0195] In some embodiments, the battery device 100 includes a case 10 and a battery cell assembly 20 .

[0196] The box body 10 includes a frame structure 12 and a bottom plate 11. The bottom plate 11 is connected to the bottom of the frame structure 12 along the height direction Z of the battery device 100. The bottom plate 11 and the frame structure 12 form a accommodating space 101 with an opening at one end. The battery cell assembly 20 is accommodated in the accommodating space 101. The opening is located on one side of the accommodating space 101 along the height direction Z of the battery device 100, and the opening is opposite to the bottom plate 11.

[0197] The battery cell assembly 20 includes a shell assembly 21 and a plurality of battery cells 22 accommodated in the shell assembly 21. The shell assembly 21 includes two first plates 211 and two second plates 212. The two first plates 211 and the two second plates 212 are alternately connected end to end along the circumference of the battery cell assembly 20, and enclose an internal space to accommodate and constrain each battery cell 22.

[0198] A receiving groove 2121 is formed on a side of the second plate 212 away from the battery cell 22 . The receiving groove 2121 receives a reinforcement member 214 , which is welded to the second plate 212 . The length of the reinforcement member 214 is equal to that of the second plate 212 .

[0199] A plurality of mounting seats 2131 are connected to the reinforcement member 214 and are arranged at intervals along the length direction of the reinforcement member 214. Each mounting seat 2131 is detachably connected to a first fastener 2132a and a second fastener 2132b on both sides along the height direction Z of the battery device 100. The first fastener 2132a is located above the mounting seat 2131, and the second fastener 2132b is located below the mounting seat 2131. The first fastener 2132a and the second fastener 2132b are both threaded sleeves.

[0200] During the process of installing the battery device 100 on the chassis 400, one end of the second connecting member 2134 is passed through the mounting seat 2131 and connected to the base plate 11 to fix the battery device 100 on the base plate 11; one end of the first connecting member 2133 is passed through the base plate 11, the second fastener 2132b, the mounting seat 2131, the first fastener 2132a in sequence and connected to the chassis 400 to fix the box body 10 and the battery cell assembly 20 on the chassis 400; the frame structure 12 is also connected to the chassis 400 by bolts.

[0201] The first connecting member 2133 and the second connecting member 2134 are both bolts.

[0202] After the battery device 100 is installed on the chassis 400 , one end of the first fastener 2132 a abuts against the mounting seat 2131 , and the other end of the first fastener 2132 a abuts against the chassis 400 ; one end of the second fastener 2132 b abuts against the mounting seat 2131 , and the other end of the second fastener 2132 b abuts against the bottom plate 11 .

[0203] In a second aspect, embodiments of the present application further provide a vehicle 1000 comprising the battery device 100 provided in some embodiments of the first aspect. Vehicle 1000 further comprises a chassis 400 comprising a floor structure, at least a portion of which is connected to the box 10 and covers the opening of the accommodating space 101.

[0204] In the vehicle 1000, a portion of the floor structure in the chassis 400 covers the opening of the accommodating space 101 and also serves as the lid of the box body 10. The battery device 100 saves the lid and reduces space occupation. The battery cell assembly 20 and the box body 10 are both connected to the chassis 400, and the connection is stable. During maintenance of the battery device 100, the box body 10 or a battery cell assembly 20 can be removed separately, which simplifies the disassembly process of the battery device 100 and reduces the difficulty of inspection and maintenance.

[0205] In a third aspect, embodiments of the present application further provide an electrical device, including the battery device 100 provided in some embodiments of the first aspect.

[0206] In this electrical device, a portion of the floor structure in the chassis 400 covers the opening of the accommodating space 101 and also serves as the box cover of the box body 10. The battery device 100 saves the box cover and reduces space occupancy; the battery cell assembly 20 and the box body 10 are both connected to the chassis 400, and the connection stability is relatively strong; during the maintenance of the battery device 100, the box body 10 or a battery cell assembly 20 can be removed separately, which simplifies the disassembly process of the battery device 100 and reduces the difficulty of inspection and maintenance.

[0207] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, applied to a vehicle, wherein the vehicle includes a chassis, characterized in that: The battery device comprises: a box body, adapted to be detachably mounted on the chassis along a first direction, the box body having a receiving space, the receiving space being a spatial structure having an opening at one end, and the opening facing the chassis along the first direction; A battery cell assembly is accommodated in the accommodating space, and the battery cell assembly includes a shell assembly and a battery cell accommodated in the shell assembly. The shell assembly is used to be detachably mounted on the chassis along the first direction, and the shell assembly can also be detachably connected to the box.

2. The battery device according to claim 1, wherein: The housing assembly includes two first plates and two second plates, the two first plates are spaced apart along a second direction, and the two second plates are spaced apart along a third direction, the second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction, and the two first plates and the two second plates are alternately connected end to end along a circumferential side of the battery cell assembly; The housing assembly further includes a connecting structure provided on the second plate body, wherein the connecting structure is used to connect to the chassis, and the connecting structure is connected to the box body.

3. The battery device according to claim 2, characterized in that The connecting structure includes a mounting seat, and the mounting seat is connected to the second plate; The connection structure also includes a fastener and a first connecting member, one end of the first connecting member passes through the box and the mounting seat and is used to connect to the chassis, the fastener is located on the side of the box facing the accommodating space, and the fastener cooperates with the first connecting member.

4. The battery device according to claim 3, characterized in that The fastener includes a first fastener and a second fastener, wherein the first fastener and the second fastener are respectively connected to two sides of the mounting base along the first direction; One end of the first fastener is against the mounting seat, and the other end of the first fastener is used to against the chassis. One end of the second fastener is against the mounting seat, and the other end of the second fastener is against the box.

5. The battery device according to claim 4, characterized in that The first fastener is detachably connected to the mounting base; and / or The second fastener is detachably connected to the mounting base.

6. The battery device according to claim 3, characterized in that The connection structure further includes a second connection member, which passes through the mounting seat and is connected to the box.

7. The battery device according to any one of claims 2 to 6, characterized in that: The housing assembly further includes a reinforcement member connected to a side of the second plate away from the battery cell. The connection structure is connected to a side of the reinforcement member away from the second plate to be indirectly connected to the second plate.

8. The battery device according to claim 7, characterized in that The reinforcement member and the second plate are integrally formed.

9. The battery device according to claim 7, wherein: The reinforcement has a cavity therein and a plurality of side walls surrounding the cavity, and at least one of the plurality of side walls is connected to the second plate body.

10. The battery device according to claim 9, characterized in that In a direction perpendicular to the second plate body, a size of the side wall connected to the second plate body ranges from 1 mm to 7 mm.

11. The battery device according to claim 7, wherein: The material of the reinforcement is different from that of the second plate.

12. The battery device according to claim 11, wherein: A receiving groove is recessed on a side of the second plate body facing the reinforcement member, and at least a portion of the reinforcement member is received in the receiving groove and connected to the second plate body.

13. The battery device according to claim 7, wherein: The length direction of the reinforcement is parallel to the length direction of the second plate body.

14. The battery device according to claim 13, wherein: The length of the reinforcement is equal to the length of the second plate.

15. The battery device according to claim 1, wherein: The box body includes a frame structure and a bottom plate, the bottom plate is connected to the frame structure along the first direction, the bottom plate and the frame structure enclose the accommodation space, and the housing assembly is connected to the bottom plate; The frame structure is directly connected to the chassis.

16. A vehicle, characterized in that: comprising a battery device according to any one of claims 1 to 15; as well as The chassis includes a floor structure, at least a portion of which is connected to the box body and covers the opening of the accommodating space.

17. An electrical device, characterized in that: A battery device comprising the battery device according to any one of claims 1 to 15.

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