Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and relates to the technical field of batteries. The battery device comprises a battery box body and a single battery located in the battery box body, the battery box body comprises a first bottom wall, a first side wall and a limiting beam, the first side wall is connected to the first bottom wall, and a containing cavity for containing the single battery is defined by the first side wall and the first bottom wall; the limiting beam is located in the containing cavity and detachably connected with the first bottom wall. The limiting beam is designed to be detachably connected with the first bottom wall and / or the first side wall, installation and follow-up dismantling and maintenance of the limiting beam are facilitated, welding slag cannot be generated when the limiting beam is installed, and then the possibility that the box body structure is damaged when the limiting beam is installed is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electrical equipment. Background Art

[0002] Battery devices are widely used in electronic devices, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc.

[0003] A limiting beam is welded in the battery box of a battery device. The welding slag generated during welding may damage the box structure, and the limiting beam is difficult to replace and repair after welding. Therefore, how to reduce the possibility of the limiting beam damaging the box structure when installing the limiting beam and facilitate the replacement and repair of the limiting beam is a research direction in battery technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can reduce the possibility of a limiting beam damaging a box structure when installing the limiting beam, and facilitate replacement and maintenance of the limiting beam.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a battery case and a battery cell located in the battery case, wherein the battery case comprises a first bottom wall, a first side wall and a limiting beam, wherein the first side wall is connected to the first bottom wall and together with the first bottom wall encloses a accommodating cavity for accommodating the battery cell; the limiting beam is located in the accommodating cavity and is detachably connected to the first bottom wall.

[0006] By adopting the above technical solution, the limit beam is designed to be detachably connected to the first bottom wall, which not only facilitates the installation and subsequent replacement or maintenance of the limit beam, but also does not generate welding slag when the limit beam is installed, thereby reducing the possibility of damaging the box structure when installing the limit beam.

[0007] In some embodiments of the present application, the first bottom wall is connected to a first plug-in structure, the limiting beam is provided with a second plug-in structure, and the first plug-in structure and the second plug-in structure are plug-fitted.

[0008] By adopting the above technical solution, a first plug-in structure is provided on the first bottom wall, and a second plug-in structure is provided on the limiting beam. The installation of the limiting beam is achieved by plugging and matching the first plug-in structure and the second plug-in structure, which can improve the assembly efficiency and stability of the limiting beam after installation.

[0009] In some embodiments of the present application, the first plug-in structure includes a plug-in component, and the second plug-in structure includes a plug-in hole or a slot that matches the plug-in component.

[0010] By adopting the above technical solution, the first plug-in structure is designed to include a plug-in component, and the second plug-in structure is designed to include a plug hole or a slot. The structure is simple, easy to process, and convenient to connect.

[0011] In some embodiments of the present application, there are multiple connectors, and the multiple connectors are arranged on the first bottom wall along the first direction and / or the second direction, and are plugged into and matched with the limiting beam. The first direction is the length direction of the limiting beam, and the second direction intersects with the first direction.

[0012] By adopting the above technical solution, the number of connectors is designed to be multiple, and multiple connectors can be connected to multiple holes or slots, which can play a positioning role when the limit beam is assembled, and can improve the installation stability of the limit beam after the limit beam is inserted.

[0013] In some embodiments of the present application, the connector includes a connecting portion and a plug-in portion, one of two opposite surfaces of the connecting portion is connected to the first bottom wall, and the other surface is connected to at least one of the plug-in portions.

[0014] By adopting the above technical solution, the connector is designed to include a connecting portion and a plug-in portion, and the connecting portion is used to connect with the first bottom wall, which can facilitate the installation of the connector on the first bottom wall.

[0015] In some embodiments of the present application, each of the connecting parts is connected to a plurality of the plug-in parts, and the plurality of the plug-in parts are arranged at intervals along the first direction and / or the second direction.

[0016] By adopting the above technical solution, multiple plug-in parts are provided on each connecting part, so that the plug-in parts that originally need to be installed one by one on the first bottom wall can be installed in an integrated manner, thereby improving assembly efficiency. At the same time, the multiple plug-in parts on each connector can further improve the installation stability of the limiting beam.

[0017] In some embodiments of the present application, the first side wall is connected to a transition structure, and the transition structure is detachably connected to the limiting beam.

[0018] By adopting the above technical solution, the battery box is designed to include a transfer structure, and the transfer structure is used to connect the limiting beam and the first side wall that are at an angle to each other, so as to facilitate a detachable connection between the two.

[0019] In some embodiments of the present application, the transition structure includes a transition member and a first fastener, one end of the transition member is connected to the first side wall, and the other end is fitted with the limiting beam, the first fastener is passed through the other end of the transition member and the limiting beam, and the other end of the transition member is detachably connected to the limiting beam.

[0020] By adopting the above technical solution, the transition structure is designed to include a transition piece and a first fastener, and one end of the transition piece is attached to the limiting beam and connected to the first side wall through the first fastener. This can improve the connection stability between the transition structure and the first side wall, and when the limiting beam is detachably connected to the first bottom wall and the first side wall at the same time, it has better structural stability and improves the ability of the limiting beam to absorb expansion.

[0021] In some embodiments of the present application, the adapter includes a first adapter portion and a second adapter portion connected at an angle, the first adapter portion is connected to the limiting beam via the first fastener, and the second adapter portion is connected to the first side wall.

[0022] By adopting the above technical solution, the adapter is designed to include a first adapter part and a second adapter part connected at an angle, so that the first adapter part can be conveniently connected to the limiting beam. Similarly, it is also convenient to connect the second adapter part to the first side wall, thereby improving the connection stability between the limiting beam and the first side wall.

[0023] In some embodiments of the present application, the transition structure is detachably connected to the first side wall.

[0024] By adopting the above technical solution, the transfer structure is also designed to be detachably connected to the first side wall, so as to facilitate the disassembly and assembly of the transfer structure and the first side wall.

[0025] In some embodiments of the present application, the battery case further includes a heat exchange component, which is mounted on the first bottom wall and is used for performing heat exchange with the battery cell.

[0026] By adopting the above technical solution, a heat exchanger is provided in the battery cell for performing heat exchange with the battery cell, thereby reducing the temperature of the battery cell.

[0027] In some embodiments of the present application, the first bottom wall is provided with a limiting structure, and the heat exchange element cooperates with the limiting structure in limiting positions in a first direction and a second direction, the first direction is the length direction of the limiting beam, and the second direction intersects with the first direction.

[0028] By adopting the above technical solution, a limiting structure is provided on the first bottom wall to fix the position of the heat exchange element in the first direction and the second direction, thereby improving the installation stability of the heat exchange element.

[0029] In some embodiments of the present application, the limiting structure includes a limiting groove opened on the first bottom wall, and the heat exchange element is at least partially embedded in the limiting groove.

[0030] By adopting the above technical solution, the limiting structure is designed to include a limiting groove, and the heat exchanger is embedded in the limiting groove and can serve as a reinforcing rib of the first bottom wall. In addition, the heat exchanger does not occupy too much space in the accommodating cavity of the battery box after installation, and also provides better installation stability for the heat exchanger.

[0031] In some embodiments of the present application, the heat exchange component includes a heat exchange elbow, the limiting groove matches the shape and size of the heat exchange elbow, and the heat exchange elbow is embedded in the limiting groove.

[0032] By adopting the above technical solution, the limiting groove is designed to match the shape and size of the heat exchange elbow, and the heat exchange elbow is embedded in the limiting groove, which can improve the limiting and fixing effect of the heat exchange elbow and better protect the heat exchange elbow.

[0033] In some embodiments of the present application, the heat exchange element is bonded to the limiting groove.

[0034] By adopting the above technical solution, the heat exchange component is bonded to the limiting groove, which not only facilitates the connection but also further improves the stability of the heat exchange component after installation.

[0035] In some embodiments of the present application, the limiting beam and the battery cell are arranged along a second direction, the limiting beam limits the battery cell along the second direction, and the second direction intersects with a length direction of the limiting beam.

[0036] By adopting the above technical solution, the limiting beam can be used to limit the displacement or expansion of the battery cell in the second direction.

[0037] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device as described in any one of the above technical solutions, and the battery device is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0040] Figure 2 A schematic diagram of a battery device provided in some embodiments of the present application;

[0041] Figure 3 A top view of a first box provided in some embodiments of the present application;

[0042] Figure 4 An exploded view of a first box provided in some embodiments of the present application;

[0043] Figure 5 A schematic diagram of the structure of a limit beam provided in some embodiments of the present application;

[0044] Figure 6 A schematic diagram of the structure of a connector provided in some embodiments of the present application;

[0045] Figure 7 A cross-sectional view of a connector provided in some embodiments of the present application.

[0046] The reference numerals of the specific embodiments are as follows:

[0047] 1000. Vehicles;

[0048] 100. Battery device;

[0049] 10. Battery box;

[0050] 1. The first box;

[0051] 11. first bottom wall; 111. limiting structure; 1111. limiting groove;

[0052] 12. a first side wall;

[0053] 13. Accommodating cavity;

[0054] 14. Limiting beam; 141. Second plug-in structure; 1411. Plug hole;

[0055] 15. first plug-in structure; 151. plug-in component; 1511. connecting portion; 1512. plug-in portion;

[0056] 16. Adapter structure; 161. Adapter; 1611. First adapter portion; 1612. Second adapter portion; 16121. Second connection hole; 162. First fastener;

[0057] 17. Heat exchange parts; 171. Heat exchange elbow;

[0058] 2. The second box;

[0059] 20. Battery cells;

[0060] 200, controller;

[0061] 300, motor;

[0062] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0065] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, H and / or B can represent: H exists alone, H and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0068] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0069] The term “plurality” used in this application refers to two or more (including two).

[0070] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0071] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0072] In some embodiments, the battery device may be a battery pack, which includes a battery case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the battery case.

[0073] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the battery case by fixing the battery module in the battery case.

[0074] As an example, the battery cell assembly may also be housed in the battery case by directly fixing a plurality of battery cells to the battery case.

[0075] As an example, the battery case may include a first case and a second case. The first case and the second case are buckled together to form a closed space inside the battery case to accommodate the battery cell assembly. The closed space here means to cover or close, which may be sealed or unsealed. The first case may be a top cover or a bottom plate.

[0076] As an example, the battery case may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the battery case to accommodate the battery cell assembly.

[0077] As an example, the battery box can be used as part of the chassis structure of the vehicle. For example, the top cover of the battery box can become at least a part of the floor of the vehicle, or the frame of the battery box can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0078] In some embodiments, the battery device refers to an energy storage device, which includes a battery box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0080] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0081] The battery device usually includes a battery box and a battery cell inside the battery box. The battery box is used to withstand external impact and pressure, protect the internal parts from physical damage, and reduce the risk caused by collision or falling. A limiting beam is provided on the outside of the battery box. The limiting beam is used to separate the internal space of the battery box into a part for accommodating the battery cell and a part for accommodating electronic control devices such as BMS, and can limit the expansion of the battery cell.

[0082] Most of the related technologies install the limit beam on the side wall of the battery case by welding. The welding slag during welding can easily damage the structure of the battery case (such as the heat exchanger), and it is difficult to perform subsequent replacement or repair. In addition, the limit beam is only welded to the side wall of the battery case and has a weak ability to absorb expansion force.

[0083] Therefore, how to reduce the damage to the battery box during the installation of the limit beam and facilitate the subsequent replacement or maintenance of the limit beam is an important topic in the research and development of the battery device and its related components.

[0084] In view of this, the present application provides a technical solution to solve the above-mentioned technical problem by detachably connecting the limiting beam to the first bottom wall and / or the first side wall of the battery box.

[0085] The battery cells described in the embodiments of the present application are suitable for batteries and electrical equipment using the batteries.

[0086] Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, and the like; spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0087] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0088] Combined with Figure 1 As shown, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0089] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0090] Combined with Figure 2 and 3As shown, an embodiment of the present application provides a battery device 100, including a battery case 10 and a battery cell 20 located in the battery case 10, the battery case 10 includes a first bottom wall 11, a first side wall 12 and a limiting beam 14, the first side wall 12 is connected to the first bottom wall 11, and together with the first bottom wall 11, encloses a accommodating cavity 13 for accommodating the battery cell 20; the limiting beam 14 is located in the accommodating cavity 13, and is detachably connected to the first bottom wall 11.

[0091] The battery device 100 may be a secondary battery or a primary battery, and may also be a lithium sulfur battery, a sodium ion battery or a magnesium ion battery, but is not limited thereto. The battery cell 20 and the battery device 100 may be cylindrical, flat, rectangular or in other shapes.

[0092] The battery case 10 is used to provide a storage space for the battery cells 20. The battery case 10 can adopt a variety of structures. In some embodiments, the battery case 10 can include a first case 1 and a second case 2. The first case 1 and the second case 2 cover each other, and the first case 1 and the second case 2 jointly define a storage space for accommodating the battery cells 20.

[0093] The first box body 1 and the second box body 2 may both be hollow structures with one end open, and the second box body 2 covers the open side of the first box body 1, so that the first box body 1 and the second box body 2 jointly define a storage space; the second box body 2 may also be a plate-like structure, the first box body 1 is a hollow structure with one side open, and the open side of the second box body 2 covers the open side of the first box body 1. Of course, the battery box body 10 formed by the first box body 1 and the second box body 2 may be in various shapes, such as a cylinder, a cuboid, etc.

[0094] The first box body 1 includes a first bottom wall 11 and a plurality of first side walls 12 connected to the first bottom wall 11 . The first bottom wall 11 and the first side walls 12 enclose a receiving cavity 13 . The receiving cavity 13 and the second box body 2 enclose the above-mentioned receiving space.

[0095] Taking the rectangular plate-shaped first bottom wall 11 in the figure as an example, the number of first side walls 12 can be four, and of course the first side wall 12 can also be regarded as a whole. The second box body 2 can have a similar structure to the first box body 1, for example, it can include a second bottom wall and a second side wall, which will not be described in detail in this embodiment.

[0096] The limiting beam 14 may also be referred to as an expansion beam, and is mainly used to reduce the expansion of the battery cell 20. The limiting beam 14 is installed in the accommodating cavity 13, and the number may be one or two as shown in the figure.

[0097] Taking the two limiting beams 14 in the figure as an example, the two limiting beams 14 are respectively located near the two ends of the accommodating cavity 13 along the length direction, and the area between the two limiting beams 14 is used to install the battery cell 20, and the area enclosed by each limiting beam 14 and the first side wall 12 opposite to it is used to install electrical components such as BMS.

[0098] Different from the related art in which the limiting beam 14 is directly welded to the side wall of the box body, in this embodiment, the limiting beam 14 is designed to be detachably connected to the first bottom wall 11 .

[0099] The “detachable connection” described in this embodiment means that after the limiting beam 14 is installed in the battery box 10, it can be removed and reinstalled without damaging the battery box 10 and the limiting beam 14. The detachable connection includes plug-in, clamping, and bolt connection.

[0100] The above three technical solutions not only facilitate the installation and subsequent removal and maintenance of the limiting beam 14, but also do not generate welding slag when the limiting beam 14 is installed, thereby reducing the possibility of damaging the box structure when installing the limiting beam.

[0101] Combined with Figure 4-6 As shown, in some examples, optionally, the first bottom wall 11 is connected to a first plug-in structure 15 , the limiting beam 14 is provided with a second plug-in structure 141 , and the first plug-in structure 15 and the second plug-in structure 141 are plug-fitted.

[0102] The first plug-in structure 15 and the second plug-in structure 141 may form a plug-in fit, that is, one of the first plug-in structure 15 and the second plug-in structure 141 is inserted into the other.

[0103] One of the first plug-in structure 15 and the second plug-in structure 141 may be an inserter, and the other may be a structure having a certain plug-in space, such as a hole or a groove, which is accommodated in the inserter.

[0104] The design of inserting the limit beam 14 and the bottom wall can strengthen the connection between the limit beam 14 and the first bottom wall 11, and improve the stability of the structure after the two are connected. In addition, the insertion method makes the later maintenance and repair of the limit beam 14 more convenient, without the need to disassemble other structural components on a large scale. In addition, the insertion method can help disperse the vibration energy and improve the overall anti-seismic performance formed by the limit beam 14 and the first bottom wall 11.

[0105] In some examples, optionally, the first plug-in structure 15 includes a plug-in component 151 , and the second plug-in structure 141 includes a plug-in hole 1411 or a slot matched with the plug-in component 151 .

[0106] The connector 151 refers to a structure that can be inserted into the socket 1411 or the slot. The shape of the connector 151 is not limited, for example, it can be a block, a strip, a cylinder, etc., which are not listed one by one in this embodiment.

[0107] The plug hole 1411 refers to a through hole structure, and the slot refers to a slot body without an upper opening, which can also be understood as a blind hole. The drawings of this embodiment only show that the second plug structure 141 includes the plug hole 1411, and the second plug structure 141 does not include a slot.

[0108] The shape and size of the plug hole 1411 or the slot need to match those of the connector 151 so that the connector 151 can fit tightly with the inner wall surface of the slot after being inserted into the plug hole 1411 or the slot.

[0109] In the above structure, the first plug-in structure 15 is designed to include a plug-in component 151, and the second plug-in structure 141 is designed to include a plug hole 1411 or a slot. The structure is simple, easy to process, and convenient to connect.

[0110] In some examples, optionally, there are multiple connectors 151, which are arranged on the bottom wall at intervals along the first direction X and / or the second direction Y, and are plugged into and matched with the limiting beam 14. The first direction X is the length direction of the limiting beam 14, and the second direction Y intersects with the first direction X.

[0111] The above technical solution includes three implementations. One is that the connectors 151 are arranged in sequence along the first direction X in the figure, and the arrangement can be at a certain interval. Another is that the connectors 151 are arranged in sequence along the second direction Y in the figure. Another is that the connectors 151 are arranged in both the first direction X and the second direction Y. Only the first implementation is shown in the figure.

[0112] The number of connectors 151 is designed to be multiple, and multiple connectors 151 can be connected to multiple jacks 1411 or slots, which can play a positioning role when the limiting beam 14 is assembled, and can improve the installation stability of the limiting beam 14 after the limiting beam 14 is inserted.

[0113] Combined with Figure 4 and attached Figure 6 As shown, in some examples, optionally, the connector 151 includes a connecting portion 1511 and a plug-in portion 1512 , one of two opposite surfaces of the connecting portion 1511 is connected to the first bottom wall 11 , and the other surface is connected to at least one plug-in portion 1512 .

[0114] The connecting portion 1511 may be a plate-shaped member or a block-shaped member, and the plug-in portion 1512 may also be a plate-shaped member or a block-shaped member, which are not listed one by one in this embodiment.

[0115] The purpose of configuring the connecting portion 1511 includes facilitating the connection of the connector 151 to the first bottom wall 11. Because the connecting portion 1512 needs to be inserted into the slot or hole 1411, the surface size parallel to the wall surface of the first bottom wall 11 cannot be made too large, resulting in the stability of the connecting portion 1512 after being connected to the first bottom wall 11 needs to be improved.

[0116] Therefore, in this embodiment, the plug connector 151 is designed to include a connecting portion 1511, and the connecting portion 1511 and the plug connector 1512 are integrated, that is, the connecting portion 1511 and the plug connector 1512 are integrally formed or integrally connected by welding or other methods.

[0117] The connecting portion 1511 has opposite lower and upper surfaces, wherein the lower surface is used to connect to the first bottom wall 11, and the connection method can be a mechanical connection method such as bonding or snapping to be installed on the first bottom wall 11, thereby expanding the connection area between the connector 151 and the first bottom wall 11, improving the stability of the connector 151 after being installed on the first bottom wall 11, and also facilitating the installation of the connector 151 on the first bottom wall 11.

[0118] In some examples, optionally, each connection portion 1511 is connected to a plurality of plug-in portions 1512 , and the plurality of plug-in portions 1512 are arranged at intervals on the connection portion 1511 along the first direction X and / or the second direction Y.

[0119] The above technical solution includes three implementations. One is that the plug-in parts 1512 on each connecting part 1511 are arranged at intervals only along the first direction X. Another is that the plug-in parts 1512 on each connecting part 1511 are arranged at intervals only along the second direction Y. Another is as follows Figure 4 and 6 The plugging portions 1512 on each connecting portion 1511 are arranged at intervals along the first direction X and also arranged at intervals along the second direction Y. In this case, at least four plugging portions 1512 are disposed on the upper surface of each connecting portion 1511 .

[0120] A plurality of plug-in parts 1512 are provided on the upper surface of the connection part 1511. More plug-in parts 1512 can enhance the stability of the limiting beam 14 after docking with the plug-in part 151, and provide better resistance to the expansion of the battery cell 20. At the same time, by providing a plurality of plug-in parts 1512 on each connection part 1511, the plug-in parts 1512 that originally need to be installed one by one on the first bottom wall 11 can be installed in an integrated manner, thereby improving assembly efficiency.

[0121] The material of the plug connector 151 of this embodiment can be metal or polymer such as plastic, as long as it meets the strength requirements. The same is true for the material of the expansion beam of this embodiment.

[0122] Combined with Figure 4 and5 As shown, in some embodiments, the first side wall 12 is connected to a transition structure 16 , and the transition structure 16 is detachably connected to the limiting beam 14 .

[0123] The transition structure 16 is detachably connected to the limiting beam 14, thereby realizing a detachable connection between the limiting beam 14 and the first side wall 12. The connection between the transition structure 16 and the first side wall 12 may be a fixed connection or a detachable connection.

[0124] The detachable connection here can also be understood as that after the limiting beam 14 is connected to the first side wall 12, the connection between the two can be released and a second installation can be performed without damaging the first side wall 12 and the limiting beam 14.

[0125] In the related art, the limiting beam 14 is usually only welded to the first side wall 12. In some embodiments, the limiting beam 14 is connected to the bottom wall through the above-mentioned connector 151 and is also connected to the first side wall 12 through the transition structure 16, thereby further improving its structural strength and thereby improving the ability to resist the expansion of the battery cell 20.

[0126] Connecting the first side wall 12 and the limiting beam 14 via the transition structure 16 not only facilitates the detachable connection between the two, but also allows a certain interval to be formed between the limiting beam 14 and the first side wall 12, facilitating wiring.

[0127] Of course, in addition to realizing the indirect detachable connection between the limiting beam 14 and the first side wall 12 through the transfer structure 16, the limiting beam 14 and the first side wall 12 can also be directly plugged in, specifically, a slot is set in one of the limiting beam 14 and the first side wall 12, and a protrusion is set in the other, and the slot and the protrusion cooperate with each other (this embodiment is not shown in the figure).

[0128] In addition, the limiting beam 14 and the first side wall 12 can also be snap-connected, specifically, a slot is provided on one of the limiting beam 14 and the first side wall 12, and a buckle is provided on the other, and the slot and the buckle cooperate with each other (this embodiment is not shown in the figure).

[0129] Combined with Figure 5 As shown, in some examples, optionally, the transition structure 16 includes a transition piece 161 and a first fastener 162, one end of the transition piece 161 is connected to the first side wall 12, and the other end is in contact with the limiting beam 14, the first fastener 162 is passed through the other end of the transition piece 161 and the limiting beam 14, and is detachably connected to the other end of the transition piece 161 and the limiting beam 14.

[0130] The length of the adapter 161 needs to be sufficient to overlap the limiting beam 14 and the first side wall 12, and the adapter 161 is provided with one or more first connection holes, and the first fastener 162 passes through the first connection hole to achieve connection with the limiting beam 14. The first connection hole is similar in structure to the second connection hole 16121 described below, and is blocked after the first fastener 162 is installed, so it is not shown in the figure.

[0131] The first fastener 162 can be a bolt or a detachable rivet. Of course, the first fastener 162 can also be a plug-in component 151. The first fastener 162 needs to have a limiting cap, which abuts against the surface of the adapter 161 facing away from the limiting beam 14, and the surface of the adapter 161 facing the limiting beam 14 is in contact with the limiting beam 14.

[0132] The transition structure 16 is designed to include a transition piece 161 and a first fastener 162. One end of the transition piece 161 is attached to the limiting beam 14 and connected to the first side wall 12 through the first fastener 162. This can improve the connection stability between the transition structure 16 and the first side wall 12. Moreover, when the limiting beam 14 is detachably connected to the first bottom wall 11 and the first side wall 12 at the same time, it has better structural stability and improves the ability of the limiting beam 14 to absorb expansion.

[0133] In some examples, optionally, the adapter 161 includes a first adapter portion 1611 and a second adapter portion 1612 connected at an angle, the first adapter portion 1611 is connected to the limiting beam 14 via a first fastener 162 , and the second adapter portion 1612 is connected to the first side wall 12 .

[0134] The “connected at an angle” in this embodiment refers to the angle between the first adapter portion 1611 and the second adapter portion 1612 being greater than 0° and less than or equal to 180°.

[0135] The first adapter part 1611 is provided with the above-mentioned first connecting hole and is used to fit with the surface of the limiting beam 14. The first adapter part 1611 and the second adapter part 1612 can both be plate-like parts or block-like parts, and their shapes only need to have surfaces that can fit with the limiting beam 14 and the first side wall 12 respectively.

[0136] In some embodiments, the first adapter portion 1611 and the second adapter portion 1612 are perpendicular to each other and are integrally formed.

[0137] This design takes into account that the limiting beam 14 is usually perpendicular to the first side wall 12 to which it is connected. The first adapter portion 1611 and the second adapter portion 1612 are designed to be perpendicular to each other, so that the first adapter portion 1611 can be easily connected to the limiting beam 14. Similarly, it is also convenient to connect the second adapter portion 1612 to the first side wall 12, thereby improving the connection stability between the limiting beam 14 and the first side wall 12.

[0138] In some examples, optionally, the transition structure 16 is detachably connected to the first side wall 12 .

[0139] The adapter structure 16 and the first side wall 12 are also detachably connected, which facilitates the assembly and disassembly of the adapter structure 16 and the first side wall 12 .

[0140] In some examples, optionally, the transition structure 16 includes the above-mentioned first transition portion 1611 and second transition portion 1612 and first fastener 162, and may also include a second fastener (not shown in the figure), the second transition portion 1612 is provided with a second connecting hole 16121, the second fastener passes through the second connecting hole 16121 and is connected to the first side wall 12.

[0141] The second fastener may also be a bolt or a detachable rivet, etc., which has the same or similar structure as the first fastener 162 described above, and will not be described in detail in this embodiment.

[0142] Combined with the attachment again Figure 3 and attached Figure 4 As shown, in some examples, optionally, the battery box 10 further includes a heat exchange element 17 , which is mounted on the first bottom wall 11 and is used for heat exchange with the battery cell 20 .

[0143] In some embodiments, the heat exchange element 17 may be a heat exchange coil or a water cooling plate. The heat exchange element 17 is mainly used to perform heat exchange with the battery cell 20 in the accommodating cavity 13 to reduce the temperature of the battery cell 20 .

[0144] In some examples, optionally, the first bottom wall 11 is provided with a limiting structure 111, and the heat exchange element 17 cooperates with the limiting structure 111 to limit position in a first direction X and a second direction Y. The first direction X is the length direction of the limiting beam 14, and the second direction Y intersects with the first direction X.

[0145] The limiting structure 111 refers to a structure that can limit the displacement of the heat exchange element 17 at least in the first direction X and the second direction Y in the figure, which can be a limiting protrusion, a limiting groove 1111 and other structures.

[0146] The limiting structure 111 plays a certain positioning role when the heat exchange element 17 is installed, and also improves the installation stability of the heat exchange element 17 after the heat exchange element 17 is installed.

[0147] In some examples, optionally, the limiting structure 111 includes a limiting groove 1111 opened on the first bottom wall 11 , and the heat exchange element 17 is at least partially embedded in the limiting groove 1111 .

[0148] The limiting groove 1111 can be a groove structure directly formed on the first bottom wall 11, and the heat exchanger 17 can be partially or completely embedded in the limiting groove 1111, and the groove wall of the limiting groove 1111 is used for limiting and fixing. After installation, the heat exchanger 17 does not occupy too much space in the accommodating cavity 13 of the battery box 10, and also provides better installation stability for the heat exchanger 17.

[0149] In some embodiments, the height of the heat exchanger 17 can allow itself to partially protrude from the limiting groove 1111, so that the heat exchanger 17 is embedded in the limiting groove 1111 and can serve as a reinforcing rib of the first bottom wall 11, thereby improving the structural strength of the first bottom wall 11.

[0150] In some embodiments, the heat exchange element 17 includes a heat exchange elbow 171 , the limiting groove 1111 matches the shape and size of the heat exchange elbow 171 , and the heat exchange elbow 171 is embedded in the limiting groove 1111 .

[0151] The heat exchange elbow 171 may be a tubular structure including at least one end being U-shaped or S-shaped, and a flowable refrigerant (such as water or cooling liquid) is provided in the heat exchange elbow 171 .

[0152] Correspondingly, the limiting groove 1111 is also designed to include a U-shaped or S-shaped groove structure at at least one end to match the heat exchange bend 171. During installation, the heat exchange bend 171 is embedded in the limiting groove 1111, so that the limiting groove 1111 can limit and protect each pipe section of the heat exchange bend 171.

[0153] Of course, the limiting structure 111 of this embodiment is not limited to the limiting groove 1111 , and may also be, for example, a limiting block or a limiting track (not shown in the figure) surrounding the shape or contour of the heat exchange elbow 171 .

[0154] In some examples, optionally, the heat exchange element 17 is bonded to the limiting groove 1111 .

[0155] The heat exchange element 17 can be bonded to the bottom wall or side wall of the limiting groove 1111, so that the heat exchange element 17 is fixed in the limiting groove 1111 along a third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y. In some embodiments, the third direction Z can be understood as the arrangement direction from the first box body 1 to the second box body 2.

[0156] The heat exchange element 17 and the limiting groove 1111 may be bonded together by means of structural adhesive, and the bonding method may be that the heat exchange element 17 is fully or partially bonded to the limiting groove 1111 .

[0157] The heat exchange element 17 after bonding can be better fixed in the limiting groove 1111, which not only facilitates the connection but also further improves the stability of the heat exchange element 17 after installation.

[0158] In some examples, optionally, the limiting beam 14 and the battery cell 20 are arranged along the second direction Y, the limiting beam 14 limits the battery cell 20 along the second direction Y, and the second direction Y intersects with the length direction of the limiting beam.

[0159] The second direction Y and the length direction of the limiting beam (the first direction X) may be perpendicular to each other. In some embodiments, the second direction may be the length direction of the battery cell 20 .

[0160] The number of the limiting beams 14 can be two, and the two limiting beams 14 are arranged at intervals along the second direction Y, and divide the battery box 10 into three receiving grooves. In some embodiments, the middle receiving groove is used to place the battery cell 20, and the receiving grooves on both sides are used to place electrical devices (not shown in the figure), etc.

[0161] One or two limiting beams 14 may be used to limit the displacement or expansion of the battery cell 20 along the second direction Y, thereby improving the stability of the battery device 100 .

[0162] Finally, please see the attached Figure 2-7As shown, the embodiment of the present application provides a battery device 100, including a battery case 10 and a battery cell 20 located in the battery case 10, the battery case 10 includes a first bottom wall 11, a first side wall 12 and a limiting beam 14, the first side wall 12 is connected to the first bottom wall 11, and together with the first bottom wall 11, it encloses a receiving cavity 13 for receiving the battery cell 20; the limiting beam 14 is located in the receiving cavity 13, and is detachably connected to the first bottom wall 11. The first bottom wall 11 is connected to a first plug-in structure 15, and the limiting beam 14 is provided with a second plug-in structure 141, and the first plug-in structure 15 and the second plug-in structure 141 are plug-matched. The first plug-in structure 15 includes a plug-in connector 151, and the second plug-in structure 141 includes a plug-in hole 1411 or a slot adapted to the plug-in connector 151. There are multiple connectors 151, which are arranged on the first bottom wall 11 along the first direction X and / or the second direction Y, and are plugged and matched with the limiting beam 14. The first direction X is the length direction of the limiting beam 14, and the second direction Y intersects with the first direction X. The connector 151 includes a connecting portion 1511 and a plug-in portion 1512. One of the two opposite surfaces of the connecting portion 1511 is connected to the first bottom wall 11, and the other surface is connected to at least one plug-in portion 1512. Multiple plug-in portions 1512 are connected to each connecting portion 1511, and the multiple plug-in portions 1512 are arranged at intervals along the first direction X and / or the second direction Y. The first side wall 12 is connected to a transfer structure 16, and the transfer structure 16 is detachably connected to the limiting beam 14. The adapter structure 16 includes an adapter 161 and a first fastener 162. One end of the adapter 161 is connected to the first side wall 12, and the other end is fitted to the limiting beam 14. The first fastener 162 is inserted through the other end of the adapter 161 and the limiting beam 14, and the other end of the adapter 161 is detachably connected to the limiting beam 14. The adapter 161 includes a first adapter portion 1611 and a second adapter portion 1612 connected at an angle. The first adapter portion 1611 is connected to the limiting beam 14 through the first fastener 162, and the second adapter portion 1612 is connected to the first side wall 12. The adapter structure 16 is detachably connected to the first side wall 12. The battery box 10 also includes a heat exchanger 17. The first bottom wall 11 is provided with a limiting structure 111. The heat exchanger 17 is installed on the first bottom wall 11 and cooperates with the limiting structure 111 to limit in the first direction X and the second direction Y. The first direction X is the length direction of the limiting beam 14, and the second direction Y intersects with the first direction X. The limiting structure 111 includes a limiting groove 1111 opened on the first bottom wall 11, and the heat exchanger 17 is at least partially embedded in the limiting groove 1111. The heat exchanger 17 includes a heat exchange elbow 171. The limiting groove 1111 matches the shape and size of the heat exchange elbow 171, and the heat exchange elbow 171 is embedded in the limiting groove 1111. The heat exchanger 17 is bonded to the limiting groove 1111.

[0163] Combined with the attachment again Figure 1As shown, based on the above-mentioned battery device 100, an embodiment of the present application further provides an electric device, including the above-mentioned battery device 100, the battery device 100 is used to provide electric energy to the electric device, and the electric device may be a vehicle 1000.

[0164] 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 it. 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 the intermediate technical features, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: The invention comprises a battery box and a battery cell located in the battery box, wherein the battery box comprises: a first bottom wall; a first side wall connected to the first bottom wall and enclosing together with the first bottom wall a receiving cavity for receiving the battery cell; and A limiting beam is located in the accommodating cavity and is detachably connected to the first bottom wall.

2. The battery device according to claim 1, characterized in that: The first bottom wall is connected with a first plug-in structure, the limiting beam is provided with a second plug-in structure, and the first plug-in structure and the second plug-in structure are plug-fitted.

3. The battery device according to claim 2, characterized in that: The first plug-in structure includes a plug-in component, and the second plug-in structure includes a plug-in hole or a slot matched with the plug-in component.

4. The battery device according to claim 3, characterized in that: There are multiple connectors, which are arranged on the first bottom wall along the first direction and / or the second direction and are plugged into and matched with the limiting beam. The first direction is the length direction of the limiting beam, and the second direction intersects with the first direction.

5. The battery device according to claim 4, characterized in that: The plug connector comprises a connecting portion and an inserting portion. One of two opposite surfaces of the connecting portion is connected to the first bottom wall, and the other surface is connected to at least one of the inserting portions.

6. The battery device according to claim 5, characterized in that: A plurality of the plug-in parts are connected to each of the connecting parts, and the plurality of the plug-in parts are arranged at intervals along the first direction and / or the second direction.

7. The battery device according to claim 1, characterized in that: The first side wall is connected with a transition structure, and the transition structure is detachably connected to the limiting beam.

8. The battery device according to claim 7, characterized in that: The transition structure includes a transition piece and a first fastener, one end of the transition piece is connected to the first side wall, and the other end is fitted with the limiting beam, the first fastener is passed through the other end of the transition piece and the limiting beam, and detachably connects the other end of the transition piece to the limiting beam.

9. The battery device according to claim 8, characterized in that: The adapter comprises a first adapter portion and a second adapter portion connected at an angle, the first adapter portion is connected to the limiting beam via the first fastener, and the second adapter portion is connected to the first side wall.

10. The battery device according to any one of claims 7 to 9, characterized in that: The transition structure is detachably connected to the first side wall.

11. The battery device according to any one of claims 1 to 9, characterized in that: The battery box further includes a heat exchange component, which is mounted on the first bottom wall and is used for heat exchange with the battery cell.

12. The battery device according to claim 11, characterized in that: The first bottom wall is provided with a limiting structure, and the heat exchange component cooperates with the limiting structure in limiting positions in a first direction and a second direction. The first direction is the length direction of the limiting beam, and the second direction intersects with the first direction.

13. The battery device according to claim 12, characterized in that: The limiting structure includes a limiting groove opened on the first bottom wall, and the heat exchange element is at least partially embedded in the limiting groove.

14. The battery device according to claim 13, characterized in that: The heat exchange component comprises a heat exchange elbow, the limiting groove matches the shape and size of the heat exchange elbow, and the heat exchange elbow is embedded in the limiting groove.

15. The battery device according to claim 13, characterized in that: The heat exchange element is bonded to the limiting groove.

16. The battery device according to any one of claims 1 to 9, characterized in that: The limiting beam and the battery cell are arranged along a second direction, the limiting beam limits the battery cell along the second direction, and the second direction intersects with a length direction of the limiting beam.

17. An electrical equipment, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 16, wherein the battery device is used to provide electrical energy.

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