Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer, a box body and a reinforcing assembly, the battery cell comprises an electrode assembly and a housing for accommodating the electrode assembly. The box body comprises a bearing plate for bearing the battery monomers; the reinforcing assemblies are arranged on the side, away from the battery monomers, of the bearing plate, and at least one reinforcing assembly is arranged in the middle of the bearing plate in the length direction of the bearing plate. The reliability of the battery device can be improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery device and an electrical device. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] In the development of battery technology, how to improve the reliability of battery devices has always been a research direction in battery technology. Summary of the Utility Model

[0004] In view of the above problems, this application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell, a box body, and a strengthening component. The battery cell includes an electrode assembly and a housing, and the housing is used to accommodate the electrode assembly. The box body includes a carrier plate for carrying the battery cell. The strengthening component is arranged on the side of the carrier plate away from the battery cell, and in the length direction of the carrier plate, at least one strengthening component is arranged in the middle of the carrier plate.

[0006] In the above solution, by arranging the strengthening component on the side of the carrier plate away from the battery cell, the occupied space of the strengthening component in the battery device is reduced, and the energy density is increased. By arranging the strengthening component in the middle of the carrier plate, the bearing strength in the middle of the battery device is enhanced, thereby improving the overall bearing strength of the battery device and the reliability of the battery device.

[0007] In some embodiments, the number of strengthening components includes a plurality, and the plurality of strengthening components are arranged at intervals in the length direction, further enhancing the bearing strength of the carrier plate, improving the overall bearing strength of the battery device, and improving the anti-impact performance of the battery device.

[0008] In some embodiments, the strengthening component includes a first strengthening plate, and in the thickness direction of the carrier plate, the projection of the first strengthening plate falls within the projection of the carrier plate.

[0009] In the above solution, the area of the first strengthening plate is less than or equal to the area of the carrier plate, so that after the first strengthening plate is fixed on the carrier plate, the risk of interference between the first strengthening plate and other external structures can be reduced, and the possibility of separation between the first strengthening plate and the carrier plate can be reduced.

[0010] In some embodiments, a plurality of convex portions extending along the length direction are provided on the side of the carrier plate away from the battery cell, and the plurality of convex portions are spaced apart along the width direction of the carrier plate. A concave portion is formed between two adjacent convex portions.

[0011] In the above solution, by setting the above, it is beneficial to improve the load-bearing strength of the carrier plate, and the convex portion can also play a buffering role, reducing the risk that the external impact force is transmitted to the battery cell through the carrier plate and causing damage to the battery cell.

[0012] In some embodiments, the first reinforcing plate includes a main body portion and a protruding portion. The main body portion is located where the protruding portion is provided, the main body portion is in contact with the carrier plate, the protruding portion protrudes from the main body portion in a direction away from the carrier plate, and at least a part of the protruding portion is disposed in the concave portion.

[0013] In the above solution, by setting the main body portion to increase the contact area between the first reinforcing plate and the carrier plate, thereby increasing the connection strength between the first reinforcing plate and the carrier plate. By setting the protruding portion, it is beneficial to improve the impact resistance of the first reinforcing plate, and the protruding portion is disposed in the concave portion to reduce the space occupied by the protruding portion in the height of the battery device, and improve the space utilization rate of the battery device.

[0014] In some embodiments, the main body portion includes a first portion in contact with the concave portion and a second portion in contact with the convex portion. The side of the protruding portion facing away from the carrier plate and the side of the second portion facing away from the carrier plate are flush with each other, so as to reduce the possibility of the protruding portion interfering with other external components while reducing the space occupied by the protruding portion in the height of the battery device and improving the space utilization rate of the battery device.

[0015] In some embodiments, the reinforcing assembly further includes a second reinforcing plate, and the first reinforcing plate is located between the second reinforcing plate and the carrier plate.

[0016] In the above solution, by setting the second reinforcing plate, it is beneficial to increase the load-bearing strength of the reinforcing assembly, thereby increasing the load-bearing strength of the carrier plate, and by laminating the first reinforcing plate and the second reinforcing plate, different structures can also be provided on the first reinforcing plate and the second reinforcing plate to meet different design requirements and improve the applicability of the battery device.

[0017] In some embodiments, the box body further includes side beams provided on both sides in the width direction of the carrier plate, and the second reinforcing plate is connected to the side beams.

[0018] In the above solution, through the above setting, it is beneficial to improve the connection strength between the second reinforcing plate and the box body, so as to reduce the possibility of the reinforcing assembly being separated from the box body and improve the reliability of the reinforcing assembly.

[0019] In some embodiments, the second reinforcing plate includes a fitting portion and a flat portion. The fitting portion is arranged to match the concave and convex portions of the bearing plate, and the flat portion protrudes from the outer surface of the side of the fitting portion facing away from the bearing plate.

[0020] In the above solution, the flat portion protrudes from the outer surface of the side of the fitting portion facing away from the bearing plate, so as to reduce the possibility of interference between the flat portion and the convex portion in the area of the flat portion. Moreover, the flat portion can reduce the possibility of damage to the bearing plate caused by external impact force.

[0021] In some embodiments, there are two fitting portions, and the two fitting portions are respectively arranged on both sides of the flat portion along the length direction, so as to increase the abutting area between the second reinforcing plate and the bearing plate, and further increase the connection strength between the second reinforcing plate and the bearing plate.

[0022] In some embodiments, the flat portion is provided with mounting holes connected to the electrical device, so that the battery device can be connected to the electrical device through the mounting holes on the flat portion, so as to reduce the possibility that the vibration of the electrical device is directly transmitted to the bearing plate when the electrical device vibrates, resulting in damage to the bearing plate or even damage to the battery cell.

[0023] In some embodiments, the bearing plate includes a plurality of sub-bearing plates, and the plurality of sub-bearing plates are arranged side by side along the length direction. In the thickness direction of the bearing plate, the projection of the junction between two adjacent sub-bearing plates falls within the projection of the reinforcing component.

[0024] In the above solution, by setting a plurality of sub-bearing plates, it is beneficial to increase the overall length of the bearing plate while reducing the manufacturing difficulty of the bearing plate. By setting the projection of the junction between adjacent sub-bearing plates within the projection of the reinforcing component, it is beneficial to increase the overall bearing load of the bearing plate and reduce the possibility of fracture at the junction between two adjacent sub-bearing plates.

[0025] In some embodiments, the box body further includes a bearing space and an inner beam located in the bearing space. The bearing space is used to bear the battery cells. The inner beam is located on the side of the bearing plate facing the bearing space. In the length direction, the inner beam is arranged in the middle of the bearing plate, and at least part of the projection of the reinforcing component along the thickness direction of the bearing plate and the projection of the inner beam along the thickness direction of the bearing plate overlap.

[0026] In the above solution, through the above settings, it is beneficial to further increase the bearing strength in the middle area of the battery device, and thus improve the overall bearing strength of the battery device.

[0027] In some embodiments, the bearing plate is a sheet metal component, so as to reduce the manufacturing difficulty of the bearing plate and the manufacturing cost of the bearing plate.

[0028] In the above solution, the width-to-length ratio of the carrier plate is 0.2 to 0.6, so as to increase the length of the battery device as much as possible while reducing the risk of poor load-bearing strength in the middle of the battery device along the length direction.

[0029] In a second aspect, an embodiment of the present application provides an electrical device, including the battery device in any of the foregoing embodiments, and the battery device is used to provide electrical energy.

[0030] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used 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 those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0033] Figure 2 is an exploded structural diagram of a battery device provided by an embodiment of the present application;

[0034] Figure 3 is a schematic structural diagram of a battery module provided by an embodiment of the present application;

[0035] Figure 4 is an exploded structural diagram of another battery device provided by an embodiment of the present application;

[0036] Figure 5 is a bottom view structural diagram of a battery device provided by an embodiment of the present application;

[0037] Figure 6 is a bottom view sectional structural diagram of another battery device provided by an embodiment of the present application;

[0038] Figure 7 is an axonometric structural diagram of a battery device provided by an embodiment of the present application.

[0039] MARKING DESCRIPTION

[0040] 1000, vehicle;

[0041] 100. Battery device; 110. Battery cell; 200. Controller; 300. Motor; 400. Housing; 500. Battery module;

[0042] 10. Box body; 11. Carrier plate; 111. Convex part; 112. Concave part; 12. Side beam; 13. Inner beam;

[0043] 20. Reinforcement assembly; 21. First reinforcement plate; 211. Main body part; 211a. First part; 211b. Second part; 212. Protruding part; 22. Second reinforcement plate; 221. Fitting part; 222. Flat part;

[0044] 30. Cover body;

[0045] H. Mounting hole;

[0046] X. Length direction; Y. Width direction. Detailed implementation mode

[0047] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field 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 accompanying drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.

[0050] Referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is merely a relational term describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0052] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and defined, technical terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0055] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used through charging after discharging.

[0056] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application do not limit this.

[0057] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc.

[0058] The battery device 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 a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0059] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0060] In some embodiments, the battery device may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0061] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body by fixing the battery module in the box body.

[0062] As an example, the battery cell assembly may also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0063] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0064] In some embodiments, the battery device may be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0065] The battery device includes a box body and battery cells. The box body may include a cover body and a box main body, and the cover body and the box main body jointly define a bearing space for accommodating the battery cells.

[0066] To improve the endurance, the overall size of the battery device is enlarged according to the shape of the electrical device. In some electrical devices, the capacity of the battery device is increased by increasing the overall length of the battery device. The box body is used to carry the battery cells. As the overall length of the battery device increases, the bearing strength of the middle area of the box body is weaker than that of the end area of the box body, resulting in a risk that the middle area of the box body is easily damaged or even cracked under the action of external vibrations and other external forces during the use of the battery device, resulting in insufficient overall strength of the battery box body and reducing the reliability of the battery device.

[0067] Based on the above technical problems, the present application provides a technical solution. By arranging the strengthening component on the side of the bearing plate away from the battery cell, the bearing space of the battery device occupied by the strengthening component is reduced, and the energy density is improved. By arranging the strengthening component in the middle of the bearing plate, the bearing strength in the middle of the battery device is enhanced, thereby improving the overall bearing strength of the battery device and the reliability of the battery device.

[0068] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using battery devices. Electrical devices are, for example, mobile phones, portable devices, laptop computers, battery cars, electric vehicles, ships, spacecraft, electric toys, and electric tools, etc. Among them, spacecraft are, for example, airplanes, rockets, space shuttles, and spaceships, etc. Electric toys include, for example, fixed or mobile electric toys. Specifically, for example, game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Electric tools include, for example, metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools. Specifically, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers.

[0069] The battery cells described in the embodiments of the present application are not limited to the above-described electrical devices. However, for the sake of brevity of description, the following embodiments will be described by taking electric vehicles as examples.

[0070] Please refer to Figure 1 , Figure 1 FIG. is a schematic structural diagram of a vehicle provided by an embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 can be arranged inside the vehicle 1000. Specifically, for example, the battery device 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the power supply of the battery device to the motor 300, for example. The battery device can be used for starting, navigation, etc. of the vehicle 1000. Of course, the battery device 100 can also be used to drive the vehicle 1000 to travel, replacing or partially replacing fuel or natural gas to provide drive for the vehicle 1000.

[0071] Figure 2 FIG. is an exploded structural diagram of a battery device provided by an embodiment of the present application. Figure 3 FIG. is a schematic structural diagram of a battery module provided by an embodiment of the present application. Figure 4 FIG. is another exploded structural diagram of a battery device provided by an embodiment of the present application. Figures 4 to 7The battery cells in the battery device are not shown.

[0072] Please refer to Figures 2 to 4 In an embodiment of the present application, a battery device is provided, which includes battery cells, a box body 10, and a strengthening component 20. The battery cell includes an electrode assembly and a housing for accommodating the electrode assembly. The box body 10 includes a bearing plate 11 for bearing the battery cell 110. The strengthening component 20 is disposed on a side of the bearing plate 11 away from the battery cell 110, and at least one strengthening component 20 is disposed in the middle of the bearing plate 11 in the length direction X of the bearing plate 11.

[0073] Optionally, the battery device may include a box body for accommodating the battery cell 110, and the box body 400 may have various structures. In some embodiments, the box body 400 may include a cover body 30 and a box body 10. The cover body 30 and the box body 10 are covered with each other, and the cover body 30 and the box body 10 jointly define a bearing space for the battery cell 110. The box body 10 may be a hollow structure with one end open, and the cover body 30 is a plate-like structure. The cover body 30 is covered on the open side of the box body 10 to form a box body 400 with a bearing space. Both the cover body 30 and the box body 10 may also be hollow structures with one side open, and the open side of the cover body 30 is covered on the open side of the box body 10 to form a box body 400 with a bearing space. Of course, the cover body 30 and the box body 10 may have various shapes, such as a cylinder, a cuboid, etc.

[0074] In the battery device 100, the number of battery cells 110 may be one or more. If there are multiple battery cells 110, the multiple battery cells 110 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 110. The multiple battery cells 110 may be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 110 is accommodated in the box body 400; of course, it may also be that multiple battery cells 110 are first connected in series, in parallel, or in a mixed connection to form a battery module 500, and then multiple battery modules 500 are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 400.

[0075] Optionally, the bearing plate 11 may have a rectangular plate-like structure.

[0076] Optionally, the material of the strengthening component 20 may be the same as that of the bearing plate 11. Of course, they may also be different.

[0077] Optionally, the number of the strengthening components 20 may include one or more.

[0078] Optionally, the reinforcing component 20 can be fixedly connected to the bearing plate 11 by means of bolts, welding, clamping, etc. Further, the reinforcing component 20 can be fixedly connected to the side of the bearing plate 11 away from the battery cell 110, or, the bearing plate 11 is provided with a through structure, and the reinforcing component 20 is fixedly connected to the side of the bearing plate 11 facing the battery cell 110.

[0079] The middle part of the bearing plate 11 refers to the middle area in the length direction X of the bearing plate 11. One or more reinforcing components 20 can be arranged in the middle part.

[0080] Optionally, the reinforcing component 20 can be in a plate-like structure, a rod-like structure or other structures.

[0081] Exemplarily, the reinforcing component 20 can be a plate-like structure extending along the width direction Y of the bearing plate 11. Optionally, the thickness of the reinforcing component 20 can be the same as the thickness of the bearing plate 11.

[0082] In the battery device provided by the embodiment of the present application, by arranging the reinforcing component 20 on the side of the bearing plate 11 away from the battery cell 110, the bearing space of the box body 400 occupied by the reinforcing component 20 is reduced, and the energy density is improved. By arranging the reinforcing component 20 in the middle part of the bearing plate 11, the bearing strength in the middle part of the battery device is enhanced, so as to improve the overall bearing strength of the battery device and improve the reliability of the battery device 100.

[0083] In some optional embodiments, please refer to Figure 2 and Figure 4 , the number of the reinforcing components 20 includes a plurality, and the plurality of reinforcing components 20 are arranged at intervals along the length direction X, further enhancing the bearing strength of the bearing plate 11, improving the overall bearing strength of the battery device, and improving the impact resistance of the battery device.

[0084] Optionally, one of the reinforcing components 20 can be arranged in the middle part of the bearing plate 11, and the remaining reinforcing components 20 are arranged at intervals with the reinforcing component 20 located in the middle part as the symmetry axis. Optionally, the plurality of reinforcing components 20 can be symmetrically arranged with respect to the middle part of the bearing plate 11.

[0085] In some optional embodiments, please refer to Figure 2 , Figure 4 and Figure 5 , the reinforcing component 20 includes a first reinforcing plate 21, and in the thickness direction of the bearing plate 11, the projection of the first reinforcing plate 21 falls within the projection of the bearing plate 11.

[0086] Optionally, the number of the first reinforcing plates 21 can include one or more.

[0087] Exemplarily, one first reinforcing plate 21 is located in the middle part of the bearing plate 11 along the length direction X.

[0088] Exemplarily, a plurality of first reinforcing plates 21 are arranged at intervals along the length direction X.

[0089] In these alternative embodiments, the area of the first reinforcing plate 21 is less than or equal to the area of the bearing plate 11, so that after the first reinforcing plate 21 is fixed on the bearing plate 11, the risk of interference between the first reinforcing plate 21 and other external structures can be reduced, and the possibility of separation between the first reinforcing plate 21 and the bearing plate 11 can be reduced.

[0090] Figure 5 It is a schematic bottom view structure diagram of a battery device provided by an embodiment of the present application.

[0091] In some alternative embodiments, please refer to Figure 2 , Figure 4 and Figure 5 , on the side of the bearing plate 11 away from the battery cell 110, there are a plurality of convex portions 111 extending along the length direction X, and the plurality of convex portions 111 are arranged at intervals along the width direction Y of the bearing plate 11. A concave portion 112 is formed between two adjacent convex portions 111.

[0092] Optionally, the convex portion 111 can penetrate through the bearing plate 11 along the length direction X. Alternatively, the convex portion 111 extends a preset distance along the length direction X.

[0093] Exemplarily, the convex portion 111 can protrude from the concave portion 112 in the direction away from the battery cell 110.

[0094] In these alternative embodiments, by setting the above settings, it is beneficial to improve the bearing strength of the bearing plate 11, and the convex portion 111 can also play a buffering role, reducing the risk that an external impact force is transmitted to the battery cell 110 through the bearing plate 11 and thus causing damage to the battery cell 110.

[0095] In some alternative embodiments, please refer to Figure 2 , Figure 4 and Figure 5 , the first reinforcing plate 21 includes a main body portion 211 and a protruding portion 212. The main body portion 211 is located where the protruding portion 212 is provided. The main body portion 211 is in contact with the bearing plate 11. The protruding portion 212 protrudes from the main body portion 211 in the direction away from the bearing plate 11, and at least a part of the protruding portion 212 is arranged in the concave portion 112.

[0096] The shape of the main body portion 211 can be set to match the shape of the carrier plate 11. For example, the carrier plate 11 includes convex portions 111 and concave portions 112 that are alternately arranged along the width direction Y. The main body portion 211 includes a first portion 211a that can be in contact with the concave portion 112 and a second portion 211b that is in contact with the convex portion 111. The first portion 211a and the second portion 211b can be connected, or they can be a split structure. Optionally, the first portion 211a and the second portion 211b can be connected by an arc-shaped structure.

[0097] The protruding portion 212 can be connected to the first portion 211a, or it can be connected to the second portion 211b.

[0098] Optionally, the main body portion 211 and the protruding portion 212 can be an integral structure.

[0099] Optionally, the protruding portion 212 protrudes from the main body portion 211 in a direction away from the carrier plate 11, so as to form a hollow structure between the protruding portion 212 and the carrier plate 11. The hollow structure can serve as a deformation space for the protruding portion 212 to deform towards the carrier plate 11 under an external force, thereby reducing the possibility of the protruding portion 212 deforming and squeezing the carrier plate 11.

[0100] In these optional embodiments, by setting the main body portion 211 to increase the contact area between the first reinforcing plate 21 and the carrier plate 11, the connection strength between the first reinforcing plate 21 and the carrier plate 11 is increased. By providing the protruding portion 212, it is beneficial to improve the impact resistance of the first reinforcing plate 21, and when the protruding portion 212 is arranged in the concave portion 112, the space occupied by the protruding portion 212 in the height direction of the battery device is reduced, improving the space utilization rate of the battery device.

[0101] In some optional embodiments, please refer to Figure 2 、 Figure 4 and Figure 5 , the main body portion 211 includes a first portion 211a in contact with the concave portion 112 and a second portion 211b in contact with the convex portion 111. The side of the protruding portion 212 facing away from the carrier plate 11 and the side of the second portion 211b facing away from the carrier plate 11 are flush, so as to reduce the possibility of the protruding portion 212 interfering with other external components while reducing the space occupied by the protruding portion 212 in the height direction of the battery device, improving the space utilization rate of the battery device.

[0102] In some optional embodiments, please refer to Figure 2 and Figure 4 , the reinforcing assembly 20 further includes a second reinforcing plate 22, and the first reinforcing plate 21 is located between the second reinforcing plate 22 and the carrier plate 11.

[0103] Optionally, the shape of the second reinforcing plate 22 may be the same as that of the first reinforcing plate 21, or of course, different.

[0104] Optionally, the area of the second reinforcing plate 22 may be larger than that of the first reinforcing plate 21, or of course, equal to or smaller than that of the first reinforcing plate 21.

[0105] Exemplarily, the second reinforcing plate 22 may be disposed to cover the first reinforcing plate 21.

[0106] Optionally, the number of the second reinforcing plates 22 may be the same as that of the first reinforcing plates 21. Of course, one second reinforcing plate 22 may also cover multiple first reinforcing plates 21.

[0107] In some examples, the second reinforcing plate 22 extends along the width direction Y. In other examples, the second reinforcing plate 22 extends along the length direction X, and the second reinforcing plate 22 and the first reinforcing plate 21 overlap to form a cross shape.

[0108] In these optional embodiments, by providing the second reinforcing plate 22, it is beneficial to increase the load-bearing strength of the reinforcing assembly 20, and thus increase the load-bearing strength of the bearing plate 11. Moreover, by stacking the first reinforcing plate 21 and the second reinforcing plate 22, different structures may also be provided on the first reinforcing plate 21 and the second reinforcing plate 22 to meet different design requirements and improve the applicability of the battery device.

[0109] In some optional embodiments, please refer to Figure 2 , Figure 4 and Figure 6 , the box body 10 further includes side beams 12 disposed on both sides of the bearing plate 11 in the width direction Y, and the second reinforcing plate 22 is connected to the side beams 12.

[0110] Optionally, the second reinforcing plate 22 may extend along the width direction Y and be abutted against the side beams 12.

[0111] Optionally, the second reinforcing plate 22 may be fixedly connected to one side beam 12 in the width direction Y, or may be fixedly connected to both side beams 12 in the width direction Y.

[0112] Optionally, the box body 10 further includes side beams 12 disposed on both sides of the bearing plate 11 in the length direction X, and the second reinforcing plate 22 may also be connected to the side beams 12 located on both sides in the length direction X.

[0113] In these optional embodiments, through the above settings, it is beneficial to improve the connection strength between the second reinforcing plate 22 and the box body 10, reduce the possibility of the separation of the reinforcing assembly 20 from the box body 10, and improve the reliability of the reinforcing assembly 20.

[0114] Figure 6 It is a schematic upward sectional view of another battery device provided by an embodiment of the present application.

[0115] In some optional embodiments, please refer to Figure 2 , Figure 4 and Figure 6 , the second reinforcing plate 22 includes a fitting portion 221 and a flat portion 222. The fitting portion is arranged to match the concave portion 112 and the convex portion 111 of the bearing plate 11. The flat portion 222 protrudes from the outer surface of the side of the fitting portion 221 facing away from the bearing plate 11.

[0116] The fitting portion 221 is arranged to match the concave portion 112 and the convex portion 111 of the bearing plate 11. In other words, a part of the shape of the fitting portion 221 is similar to the shape of the concave portion 112 and they are close to each other or even in contact. Another part of the shape of the fitting portion 221 is similar to the shape of the convex portion 111 and they are close to each other or even in contact.

[0117] Optionally, the projection of the first reinforcing plate 21 in the thickness direction of the bearing plate 11 may be located within the projection of the flat portion 222 in the thickness direction.

[0118] In these optional embodiments, the flat portion 222 protrudes from the outer surface of the side of the fitting portion 221 facing away from the bearing plate 11, so as to reduce the possibility of interference between the flat portion 222 and the convex portion 111 located in the flat portion area. And the flat portion 222 can reduce the possibility of damage to the bearing plate 11 caused by external impact force.

[0119] In some optional embodiments, please refer to Figure 2 , Figure 4 and Figure 6 , the fitting portion 221 includes two. The two fitting portions are respectively arranged on both sides of the flat portion 222 along the length direction X, so as to increase the contact area between the second reinforcing plate 22 and the bearing plate 11, and further increase the connection strength between the second reinforcing plate 22 and the bearing plate 11.

[0120] Optionally, the dimension of the fitting portion 221 along the width direction Y may be less than or equal to the dimension of the flat portion 222 along the width direction Y.

[0121] Optionally, the two fitting portions 221 are in contact with the bearing plate 11, and the flat portion 222 extends along the width direction Y and is in contact with the side beam 12 arranged in the width direction.

[0122] In some optional embodiments, please refer to Figure 2 , Figure 4 and Figure 6, the flat portion 222 is provided with mounting holes H connected to the electrical device, so that the battery device can be connected to the electrical device through the mounting holes H on the flat portion 222, thereby reducing the possibility that the vibration directly transmitted to the carrier plate 11 when the electrical device vibrates causes damage to the carrier plate or even damage to the battery cell 110.

[0123] In some alternative embodiments, the carrier plate includes a plurality of sub-carrier plates arranged side by side in the length direction. In the thickness direction of the carrier plate, the projection of the junction between two adjacent sub-carrier plates falls within the projection of the reinforcement assembly.

[0124] Optionally, the plurality of sub-carrier plates can be fixedly connected by welding, bolt connection or the like.

[0125] In these alternative embodiments, by providing a plurality of sub-carrier plates, it is beneficial to increase the overall length of the carrier plate while reducing the manufacturing difficulty of the carrier plate. By setting the projection of the junction between adjacent sub-carrier plates within the projection of the reinforcement assembly, it is beneficial to increase the overall load-bearing capacity of the carrier plate and reduce the possibility of fracture at the junction between two adjacent sub-carrier plates.

[0126] Figure 7 It is an isometric structural schematic diagram of a battery device provided by an embodiment of the present application.

[0127] In some alternative embodiments, please refer to Figure 2 、 Figure 4 and Figure 7 , the box body 10 further includes a loading space and an inner beam 13 located in the loading space. The loading space is used to load the battery cell 110. The inner beam 13 is located on the side of the carrier plate 11 facing the loading space. In the length direction X, the inner beam 13 is arranged in the middle of the carrier plate 11, and at least part of the projection of the reinforcement assembly 20 in the thickness direction of the carrier plate and the projection of the inner beam 13 in the thickness direction of the carrier plate 11 overlap.

[0128] Optionally, the inner beam 13 can divide the loading space into two or more sub-loading spaces, and each sub-loading space can be provided with a battery cell 110 or a battery module.

[0129] Optionally, the reinforcement assembly 20 can be fixedly connected to the inner beam 13. For example, the carrier plate 11 is provided with a through structure, and a fixing member passes through the through structure to fix the reinforcement assembly 20 and the inner beam 13 together.

[0130] Optionally, the inner beam 13 can extend along the width direction Y.

[0131] In some examples, the projection of the reinforcing component 20 along the thickness direction of the bearing plate 11 and the projection of the inner beam 13 along the thickness direction of the bearing plate 11 are overlapped. In other examples, a part of the projection of the reinforcing component 20 along the thickness direction of the bearing plate 11 and the projection of the inner beam 13 along the thickness direction of the bearing plate 11 are overlapped.

[0132] In these optionally implemented embodiments, through the above settings, it is beneficial to further increase the bearing strength of the middle area of the battery device, thereby improving the overall bearing strength of the battery device.

[0133] In some optionally implemented embodiments, the bearing plate 11 is a sheet metal component to reduce the manufacturing difficulty of the bearing plate 11 and the manufacturing cost of the bearing plate.

[0134] In some optionally implemented embodiments, the aspect ratio of the width to the length of the bearing plate 11 is 0.2 to 0.6, so as to increase the length of the battery device as much as possible while reducing the risk of poor bearing strength in the middle of the battery device along the length direction X.

[0135] In some examples, the aspect ratio of the width to the length of the bearing plate 11 is 0.2, 0.3, 0.4, 0.5, or 0.6.

[0136] In a second aspect, an embodiment of the present application provides an electrical device, including the battery device in any of the foregoing implementation manners, and the battery device is used to provide electrical energy.

[0137] It should be noted that the electrical device provided by the embodiment of the present application has the beneficial effects of the battery device in any of the foregoing implementation manners. For specific content, please refer to the description of the beneficial effects of the electrical device above. The embodiment of the present application will not be repeated here.

[0138] According to some embodiments of the present application, please refer to Figures 2 to 7 , the electrical device includes a battery cell, a box body 10, and a reinforcing component 20. The battery cell includes an electrode assembly and a housing, and the housing is used to accommodate the electrode assembly. The box body includes a bearing plate 11 for bearing the battery cell 110. The reinforcing component 20 is disposed on a side of the bearing plate 11 away from the battery cell 110. In the length direction X of the bearing plate, at least one reinforcing component 20 is disposed in the middle of the bearing plate 11. The number of the reinforcing components 20 includes a plurality, and the plurality of reinforcing components 20 are spaced apart along the length direction X.

[0139] The reinforcing component includes a first reinforcing plate 21 and a second reinforcing plate 22. In the thickness direction of the bearing plate 11, the projection of the first reinforcing plate 21 falls within the projection of the bearing plate 11. On the side of the bearing plate away from the battery cell 110, there are a plurality of convex portions 111 extending along the length direction X, and the plurality of convex portions are arranged at intervals along the width direction Y of the bearing plate 11; a concave portion 112 is formed between two adjacent convex portions 111. The first reinforcing plate 21 includes a main body portion 211 and a protruding portion 212. The main body portion 211 is located where the protruding portion is provided, the main body portion is in contact with the bearing plate 11, the protruding portion 212 protrudes from the main body portion 211 in a direction away from the bearing plate, and at least part of the protruding portion 212 is arranged in the concave portion 112. The first reinforcing plate 21 is located between the second reinforcing plate 22 and the bearing plate 11. The box body 10 further includes side beams 12 arranged on both sides in the width direction Y of the bearing plate, and the second reinforcing plate 22 is connected to the side beams. The second reinforcing plate includes a fitting portion 221 and a flat portion 222. The fitting portion is matched with the concave portion 112 and the convex portion 111 of the bearing plate 11, and the flat portion 222 protrudes from the outer surface of the side of the fitting portion 221 facing away from the bearing plate 11. There are two fitting portions 221, and the two fitting portions are arranged on both sides of the flat portion 222 along the length direction X. The surface is provided with a mounting hole H connected to the electrical device. The box body 10 further includes a bearing space and an inner beam 13 located in the bearing space. The bearing space is used to bear the battery cell 110. The inner beam 13 is located on the side of the bearing plate 11 facing the bearing space. In the length direction X, the inner beam 13 is arranged in the middle of the bearing plate 11, and at least part of the projection of the reinforcing component 20 along the thickness direction of the bearing plate 11 and the projection of the inner beam 13 along the thickness direction of the bearing plate overlap. The bearing plate 11 is a sheet metal member.

[0140] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A battery cell, including an electrode assembly and a housing for accommodating the electrode assembly; A box body, including a carrier plate for carrying the battery cell; A strengthening assembly is disposed on a side of the carrier plate away from the battery cell, and in a length direction of the carrier plate, at least one of the strengthening assemblies is disposed in a middle portion of the carrier plate.

2. The battery device according to claim 1, characterized in that, The number of the strengthening assemblies includes a plurality, and the plurality of strengthening assemblies are spaced apart along the length direction.

3. The battery device according to claim 1, characterized in that, The strengthening assembly includes a first strengthening plate, and in a thickness direction of the carrier plate, a projection of the first strengthening plate falls within a projection of the carrier plate.

4. The battery device according to claim 3, wherein A plurality of convex portions extending along the length direction are provided on a side of the carrier plate away from the battery cell, and the plurality of convex portions are spaced apart along a width direction of the carrier plate; a concave portion is formed between two adjacent convex portions.

5. The battery device according to claim 4, characterized in that, The first strengthening plate includes a main body portion and a protruding portion. The main body portion is located where the protruding portion is provided. The main body portion is in contact with the carrier plate, and the protruding portion protrudes from the main body portion in a direction away from the carrier plate. At least a part of the protruding portion is disposed in the concave portion.

6. The battery device according to claim 5, characterized in that, The main body portion includes a first portion in contact with the concave portion and a second portion in contact with the convex portion, and a side of the protruding portion facing away from the carrier plate and a side of the second portion facing away from the carrier plate are flush.

7. The battery device according to claim 3, characterized in that, The strengthening assembly further includes a second strengthening plate, and the first strengthening plate is located between the second strengthening plate and the carrier plate.

8. The battery device according to claim 7, wherein, The box body further includes side beams disposed on both sides in a width direction of the carrier plate, and the second strengthening plate is connected to the side beams.

9. The battery device according to claim 7, characterized in that, The second strengthening plate includes a fitting portion and a flat portion. The fitting portion is matched with the concave and convex portions of the carrier plate, and the flat portion protrudes from an outer surface of the fitting portion facing away from the carrier plate.

10. The battery device according to claim 9, wherein, There are two of the fitting portions, and the two fitting portions are respectively disposed on both sides of the flat portion along the length direction.

11. The battery device according to claim 9, characterized in that, The flat portion is provided with mounting holes connected to an electrical device.

12. The battery device according to claim 1, characterized in that, The carrier plate includes a plurality of sub-carrier plates arranged side by side along the length direction, and in a thickness direction of the carrier plate, a projection of a junction between two adjacent sub-carrier plates falls within a projection of the strengthening assembly.

13. The battery device according to claim 1, characterized in that, The box body further includes a carrying space and an inner beam located in the carrying space. The carrying space is for carrying the battery cell. The inner beam is located on a side of the carrier plate facing the carrying space. In the length direction, the inner beam is disposed in a middle portion of the carrier plate, and at least a part of a projection of the strengthening assembly along the thickness direction of the carrier plate and a projection of the inner beam along the thickness direction of the carrier plate overlap.

14. The battery device according to claim 1, characterized in that, The carrier plate is a sheet metal member.

15. The battery device according to claim 1, characterized in that, The width-to-length ratio of the carrier plate is 0.2 to 0.

6.

16. An electrical device, characterized in that, Including the battery device according to any one of claims 1 to 15, the battery device is used to provide electrical energy.

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