Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body and a battery monomer, the box body comprises a containing space and a first beam, the first beam is arranged on at least one side of the containing space in the first direction and extends in the second direction, the first beam comprises a beam body and a plate body, the plate body is connected to the surface of one side of the beam body in the third direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other. The battery cells are accommodated in the accommodation space. Wherein a cavity is formed in the beam body, the plate body is of a solid structure, and the size of the plate body in the first direction is smaller than that of the beam body in the first direction. According to the invention, the reliability and energy density of the battery device can be effectively considered.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0003] In the development of battery technology, how to strike a balance between the reliability and energy density of battery devices is an ongoing research direction in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device that can effectively balance the reliability and energy density of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device comprising a housing and a battery cell. The housing comprises a storage space and a first beam. The first beam is disposed on at least one side of the storage space along a first direction and extends along a second direction. The first beam comprises a beam body and a plate body. The plate body is connected to a surface of one side of the beam body along a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other. The battery cell is accommodated in the storage space. The beam body has a cavity within it, the plate body is a solid structure, and the size of the plate body along the first direction is smaller than the size of the beam body along the first direction.

[0006] The first beam of the above-mentioned technical solution utilizes a combined design of a beam body with a cavity and a solid plate body. The cavity within the beam body absorbs energy, ensuring the first beam's collision resistance. The solid plate body, while providing some protection, effectively reduces the overall volume of the first beam, thereby minimizing its overall space utilization. This effectively balances the reliability and energy density of the battery device.

[0007] In some embodiments of the first aspect, in the third direction and in the direction close to the beam body, the size of the plate body along the first direction tends to gradually increase.

[0008] The above technical solution enables the connection area of ​​the plate body close to the beam body to have higher structural strength and stability, so as to improve the reliability of the connection between the plate body and the beam body while limiting the increase in the overall volume of the plate body, and effectively reduce the risk of fracture at the connection part between the plate body and the beam body when subjected to impact load, thereby further improving the overall impact resistance of the first beam.

[0009] In some embodiments of the first aspect, the box further includes a bottom plate disposed on one side of the accommodating space along the third direction, the first beam connected to the bottom plate, and the battery cells supported on the bottom plate. The plate has a first surface facing the accommodating space, and the bottom plate has a second surface facing the accommodating space, with the first surface being perpendicular to the second surface.

[0010] The above technical solution facilitates the formation of a regularly shaped accommodation space inside the box, which not only improves the modular arrangement of battery cells in the accommodation space to enhance the space utilization efficiency inside the box, but also improves the convenience of assembling the battery cells.

[0011] In some embodiments of the first aspect, the plate body has a third surface facing away from the accommodating space, the third surface is inclined relative to the first surface, and the angle between the plane where the third surface is located and the plane where the second surface is located and pointing to the accommodating space is an acute angle.

[0012] Through the coordination of the first surface and the third surface, the smoothness of demolding during mold forming can be improved, while the size of the plate along the first direction in the third direction and close to the beam body tends to gradually increase, so as to take into account the preparation efficiency and impact resistance of the first beam body.

[0013] In some embodiments of the first aspect, the plate body has a fourth surface facing away from the beam body, the fourth surface is connected between the first surface and the third surface, and the fourth surface is bent away from the beam body along the third direction.

[0014] The fourth surface can play a certain buffering role during the stress process, helping to guide and disperse the stress generated by the external load, so as to reduce the risk of stress concentration caused by sharp edges and corners.

[0015] In some embodiments of the first aspect, a dimension of the plate along the first direction is 2 mm to 20 mm.

[0016] By setting the size of the plate body along the first direction to be greater than or equal to 2 mm, the structural strength of the plate body can be improved, thereby improving the overall impact resistance of the first beam; by setting the size of the plate body along the first direction to be less than or equal to 20 mm, the volume of the plate body can be reduced, thereby reducing the overall space occupancy of the first beam.

[0017] In some embodiments of the first aspect, a dimension of the plate along the first direction is 4 mm to 8 mm.

[0018] The balance between the impact resistance and the space occupancy rate of the first beam can be further improved.

[0019] In some embodiments of the first aspect, the box further includes a buffer connected to a side of the plate facing away from the accommodating space, and an elastic modulus of the buffer is smaller than an elastic modulus of the plate.

[0020] The buffer member of the above technical solution can serve as a protective barrier, which can preferentially deform and absorb energy when the battery device is subjected to external impact or vibration, effectively reducing the impact peak transmitted to the first beam and reducing the impact energy directly acting on the first beam, thereby further improving the reliability of the battery device.

[0021] In some embodiments of the first aspect, there are multiple buffer members, and the multiple buffer members are spaced apart along the second direction, which can further improve the buffering effect of the buffer members on the first beam.

[0022] In some embodiments of the first aspect, there are two first beams, and the two first beams are respectively disposed on two sides of the accommodating space along the first direction.

[0023] In some embodiments of the first aspect, the box further includes two second beams, which are respectively disposed on both sides of the accommodating space along the second direction, and the second beams are connected between the two first beams.

[0024] The second beam can support the two first beams to improve the overall structural stability of the box.

[0025] In some embodiments of the first aspect, the box further includes a third beam, which is disposed in the accommodating space and connected between the two first beams.

[0026] The third beam can support the two first beams to further improve the overall structural stability of the box.

[0027] In some embodiments of the first aspect, the battery device further comprises a cover connected to the box body to enclose the accommodation space. The cover comprises a first side wall connected to the beam body and located on a side of the plate body facing away from the accommodation space.

[0028] The first side wall is located on the side of the plate body facing away from the accommodating space, so that the first side wall can play a certain protective role for the plate body. When the battery device is subjected to external impact or vibration, it can reduce the impact peak transmitted to the plate body, reduce the impact energy directly acting on the plate body, and reduce the risk of damage to the plate body.

[0029] In a second aspect, the present application provides an electrical device, which includes a battery device provided by any embodiment of the first aspect, and the battery device is used to store or provide electrical energy.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0033] Figure 2 A schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application;

[0034] Figure 3 A battery device provided in some embodiments of the present application is Figure 2 An enlarged partial cross-sectional structural diagram at H;

[0035] Figure 4 Another battery device provided in some embodiments of the present application is Figure 2 Schematic diagram of the enlarged partial cross-sectional structure at H.

[0036] The accompanying drawings in the specific implementation manner are as follows:

[0037] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor;

[0038] 10. Box; 11. Accommodation space;

[0039] 12. First beam; 121. Beam body; 1211. Cavity; 122. Plate body; 1221. First surface; 1222. Third surface; 1223. Fourth surface;

[0040] 13. Bottom plate; 131. Second surface;

[0041] 14. Buffer; 15. Second beam; 16. Third beam;

[0042] 20. Battery cells;

[0043] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. 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" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0046] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0048] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0049] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0050] The term "plurality" used in this application refers to two or more (including two).

[0051] In this application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" also includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0052] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0053] In the development of battery technology, how to strike a balance between the reliability and energy density of battery devices is an ongoing research direction in battery technology.

[0054] In related technologies, a battery device includes a housing and battery cells. The housing typically includes a frame beam with a cavity inside. This cavity absorbs energy from side impacts and improves the housing's collision resistance. However, the presence of the cavity makes the frame beam typically bulky, occupying a large space and affecting the energy density of the battery device.

[0055] Based on the above considerations, the present application designs a battery device, which includes a box body and a battery cell. The box body includes a storage space and a first beam. The first beam is arranged on at least one side of the storage space along the first direction and extends along the second direction. The first beam includes a beam body and a plate body. The plate body is connected to a side surface of the beam body along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The battery cell is accommodated in the storage space. The beam body has a cavity inside, the plate body is a solid structure, and the size of the plate body along the first direction is smaller than the size of the beam body along the first direction.

[0056] The first beam of the above-mentioned technical solution utilizes a combined design of a beam body with a cavity and a solid plate body. The cavity within the beam body absorbs energy, ensuring the first beam's collision resistance. The solid plate body, while providing some protection, effectively reduces the overall volume of the first beam, thereby minimizing its overall space utilization. This effectively balances the reliability and energy density of the battery device.

[0057] The battery cells described in the embodiments of the present application are suitable for battery devices and electrical equipment using battery devices. Electrical equipment can be equipment that uses a battery device as a power source or various energy storage systems that use a battery device as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0058] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0059] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0060] like Figure 1 As shown, a battery device 2 is provided inside the vehicle 1, and the battery device 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery device 2 can be used to power the vehicle 1, for example, the battery device 2 can serve as an operating power source for the vehicle 1.

[0061] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during startup, navigation, and driving.

[0062] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0063] In some embodiments, the battery device 2 may be an energy storage device.

[0064] Energy storage devices can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. They can store electrical energy as needed and deliver it when appropriate. For example, they can store energy during low-demand periods and provide it to users or devices during peak demand periods.

[0065] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0066] Figure 2 This is a schematic diagram of an exploded structure of a battery device provided in some embodiments of the present application. Figure 3 A battery device provided in some embodiments of the present application is Figure 2 Schematic diagram of the enlarged partial cross-sectional structure at H.

[0067] Continue to refer Figures 2 to 3 The embodiment of the present application provides a battery device 2, which includes a housing 10 and a battery cell 20. The housing 10 includes a storage space 11 and a first beam 12. The first beam 12 is disposed on at least one side of the storage space 11 along a first direction X and extends along a second direction Y. The first beam 12 includes a beam body 121 and a plate body 122. The plate body 122 is connected to a side surface of the beam body 121 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The battery cell 20 is accommodated in the storage space 11. A cavity 1211 is provided within the beam body 121. The plate body 122 is a solid structure. The dimension of the plate body 122 along the first direction X is smaller than the dimension of the beam body 121 along the first direction X.

[0068] The battery device 2 may include one or more battery cell assemblies to provide voltage and capacity.

[0069] The battery cell assembly may include a plurality of battery cells 20 , which are connected in series, in parallel, or in hybrid mode via a busbar. Hybrid mode means that the plurality of battery cells 20 are connected in both series and parallel mode.

[0070] The battery cell 20 may be a secondary battery cell. A secondary battery cell refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0071] As an example, the battery cell 20 can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel metal hydride battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc.

[0072] As an example, the battery cell 20 may be a prismatic battery cell, a soft-pack battery cell, or a battery cell of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal battery cells. Polygonal battery cells are, for example, hexagonal battery cells.

[0073] A battery cell assembly is typically formed by arranging multiple battery cells 20. For example, the battery cell assembly may be a battery module, which is formed by arranging and fixing multiple battery cells 20 to form a single module. For example, a battery module may be formed by bundling multiple battery cells 20 with a cable tie.

[0074] The battery device 2 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10. For example, the battery cell assemblies may be battery modules, which may be housed in the housing 10 by securing the battery modules in the housing 10. For example, the battery cell assembly may also be housed in the housing 10 by directly securing a plurality of battery cells 20 to the housing 10.

[0075] For example, the first beam 12 can also be called the frame beam of the box body 10. The first beam 12 can resist external impact, reduce the risk of damage to the internal structure of the battery device 2, thereby reducing the risk of battery short circuit and fire, and improving the reliability of the battery device 2.

[0076] The plate 122 can be detachably connected to the beam 121 or integrally provided on the beam 121. The plate 122 can be directly connected to the beam 121 or secured to the beam 121 via other components. For example, the plate 122 and the beam 121 can be connected by, but are not limited to, welding, bolting, clamping, riveting, or bonding.

[0077] A cavity 1211 is provided inside the beam body 121 , and the cavity 1211 extends along the second direction Y. The cavity 1211 can absorb impact energy during a collision.

[0078] Optionally, the shape of the cross section of the cavity 1211 perpendicular to the second direction Y may be, but is not limited to, a rectangle, an ellipse, or a honeycomb.

[0079] Optionally, the beam body 121 may be made of, but is not limited to, high-strength aluminum alloy or stainless steel.

[0080] The plate 122 is a solid structure, and its dimension along the first direction X is smaller than that of the beam 121 along the first direction X. This allows the plate 122 to effectively reduce the overall volume of the first beam 12 while providing a certain degree of protection, thereby reducing the overall space occupancy of the first beam 12.

[0081] As an example, the area of ​​the cross section of the plate body 122 perpendicular to the second direction Y may be smaller than the area of ​​the cross section of the beam body 121 perpendicular to the second direction Y, wherein the area of ​​the cross section of the beam body 121 perpendicular to the second direction Y is the sum of the area of ​​the cross section of the physical structure of the beam body 121 perpendicular to the second direction Y and the area of ​​the cross section of the cavity 1211 perpendicular to the second direction Y.

[0082] Optionally, the shape of the cross section of the plate body 122 perpendicular to the second direction Y may be, but is not limited to, a rectangle, a trapezoid, or an L-shape.

[0083] Optionally, the plate body 122 may be made of, but is not limited to, high-strength aluminum alloy or stainless steel.

[0084] The beam body 121 and the plate body 122 may be made of the same material or different materials.

[0085] As an example, the beam body 121 and the plate body 122 are made of the same material, which can simplify the manufacturing process of the first beam 12 and reduce costs.

[0086] The first beam 12 of the above-described technical solution utilizes a combined design of a beam body 121 having a cavity 1211 and a solid plate body 122. The cavity 1211 within the beam body 121 serves as an energy absorber, ensuring the first beam 12's anti-collision performance. The solid plate body 122, while providing a certain degree of protection, effectively reduces the overall volume of the first beam 12, thereby reducing the overall space occupied by the first beam 12. This effectively balances the reliability and energy density of the battery device 2.

[0087] In some embodiments, the plate body 122 and the beam body 121 are an integrally formed structure.

[0088] On the one hand, there is no need to connect the plate body 122 and the beam body 121 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the plate body 122 and the beam body 121 through an additional connection process, the plate body 122 and the beam body 121 in an integrated structure have higher structural strength.

[0089] For example, the first beam 12 may be integrally formed by extrusion.

[0090] In some embodiments, in the third direction Z and in the direction close to the beam body 121 , the size of the plate body 122 along the first direction X tends to gradually increase.

[0091] For example, the gradual increase in the size of the plate body 122 along the first direction X can be achieved in the form of a wedge, an inclined surface, or a step. For example, the cross section of the plate body 122 perpendicular to the second direction Y is in the shape of a wedge or a trapezoid.

[0092] The dimension of the plate body 122 along the first direction X can be understood as the distance along the first direction X between a side surface of the plate body 122 facing the accommodating space 11 and a side surface of the plate body 122 facing away from the accommodating space 11 .

[0093] The size of the plate body 122 along the first direction X may vary linearly. For example, the cross section of the plate body 122 perpendicular to the second direction Y may be wedge-shaped or trapezoidal.

[0094] The size of the plate 122 along the first direction X may also vary nonlinearly. For example, the surface of the plate 122 facing the accommodating space 11 is flat, and the surface of the plate 122 facing away from the accommodating space 11 is curved toward the accommodating space 11 .

[0095] The above technical solution enables the connection area of ​​the plate body 122 close to the beam body 121 to have higher structural strength and stability, so as to improve the reliability of the connection between the plate body 122 and the beam body 121 while limiting the increase in the overall volume of the plate body 122, and effectively reduce the risk of fracture of the connection part between the plate body 122 and the beam body 121 when subjected to impact load, thereby further improving the overall impact resistance of the first beam 12.

[0096] In some embodiments, the housing 10 further includes a bottom plate 13, which is disposed on one side of the accommodating space 11 along the third direction Z. The first beam 12 is connected to the bottom plate 13, and the battery cells 20 are supported on the bottom plate 13. The plate 122 has a first surface 1221 facing the accommodating space 11, and the bottom plate 13 has a second surface 131 facing the accommodating space 11, with the first surface 1221 being perpendicular to the second surface 131.

[0097] The first beam 12 can be detachably connected to the base plate 13 or integrally provided on the base plate 13. The first beam 12 can be directly connected to the base plate 13 or secured to the base plate 13 by other components. For example, the connection between the first beam 12 and the base plate 13 can be, but is not limited to, welding, bolting, clamping, riveting, or bonding.

[0098] As an example, the first beam 12 is connected to the bottom plate 13 via a beam body 121 .

[0099] Optionally, the bottom plate 13 may be made of, but is not limited to, high-strength aluminum alloy or stainless steel.

[0100] The second surface 131 of the bottom plate 13 can also be understood as a supporting surface for supporting the battery cells 20 .

[0101] The above technical solution facilitates the formation of a regularly shaped accommodation space 11 inside the box 10 , which not only improves the modular arrangement of the battery cells 20 in the accommodation space 11 to enhance the space utilization efficiency inside the box 10 , but also improves the convenience of assembling the battery cells 20 .

[0102] In some embodiments, a side surface of the beam body 121 facing the accommodating space 11 is perpendicular to the second surface 131 , which can further improve the regularity of the accommodating space 11 inside the box body 10 .

[0103] In some embodiments, the first surface 1221 is flush with the surface of the beam body 121 facing the accommodating space 11 , which can further improve the consistency of the first beam 12 facing the accommodating space 11 .

[0104] In some embodiments, the plate body 122 has a third surface 1222 facing away from the accommodating space 11 , and the third surface 1222 is tilted relative to the first surface 1221 .

[0105] The third surface 1222 can be inclined in various ways.

[0106] As an example, the edge of the third surface 1222 away from the beam body 121 may be relatively close to the first surface 1221 , and the edge of the third surface 1222 close to the beam body 121 may be relatively far from the first surface 1221 .

[0107] As another example, the side edge of the third surface 1222 away from the beam body 121 may be relatively far away from the first surface 1221 , and the side edge of the third surface 1222 close to the beam body 121 may be relatively close to the first surface 1221 .

[0108] In some embodiments, the angle a between the plane where the third surface 1222 is located and the plane where the second surface 131 is located and pointing to the accommodating space 11 is an acute angle.

[0109] Illustratively, in this embodiment, an edge of the third surface 1222 away from the beam body 121 is relatively close to the first surface 1221 , and an edge of the third surface 1222 close to the beam body 121 is relatively far from the first surface 1221 .

[0110] By cooperating with the first surface 1221 and the third surface 1222, it is possible to improve the demolding smoothness during mold forming while achieving a trend of gradually increasing the size of the plate body 122 along the first direction X in the third direction Z and close to the beam body 121, so as to take into account both the preparation efficiency and impact resistance of the first beam 12 body.

[0111] In some embodiments, the plate body 122 has a fourth surface 1223 facing away from the beam body 121 , and the fourth surface 1223 is connected between the first surface 1221 and the third surface 1222 .

[0112] The fourth surface 1223 may be directly connected to the first surface 1221 or indirectly connected to the first surface 1221 through other surfaces. The fourth surface 1223 may be directly connected to the third surface 1222 or indirectly connected to the third surface 1222 through other surfaces.

[0113] By introducing the fourth surface 1223 , the sharp edge of the end of the plate 122 away from the beam 121 caused by the direct connection between the first surface 1221 and the third surface 1222 resulting in a geometric mutation can be effectively alleviated, thereby significantly reducing the probability of stress concentration.

[0114] Figure 4 Another battery device provided in some embodiments of the present application is Figure 2 Schematic diagram of the enlarged partial cross-sectional structure at H.

[0115] Continue to refer Figure 4 In some embodiments, the fourth surface 1223 is bent along the third direction Z away from the beam body 121 .

[0116] The fourth surface 1223 can play a certain buffering role during the stress-bearing process, helping to guide and disperse the stress generated by the external load, so as to reduce the risk of stress concentration caused by sharp corners.

[0117] In some embodiments, the fourth surface 1223 is an arc surface.

[0118] In some embodiments, the fourth surface 1223 is a plane, which helps to reduce processing difficulty.

[0119] In some embodiments, the fourth surface 1223 is a plane and is parallel to the second surface 131 .

[0120] In some embodiments, the fourth surface 1223 is a plane, and an arc surface is provided between the fourth surface 1223 and the first surface 1221 .

[0121] In some embodiments, the fourth surface 1223 is a plane, and an arc surface is provided between the fourth surface 1223 and the third surface 1222 .

[0122] The arc surface can play a certain buffering role during the force process, helping to guide and disperse the stress generated by external loads to reduce the risk of stress concentration caused by sharp edges and corners.

[0123] In some embodiments, a dimension d1 of the plate 122 along the first direction X is 2 mm to 20 mm.

[0124] Exemplarily, the dimension d1 of the plate body 122 along the first direction X may be understood as the thickness of the plate body 122 .

[0125] As an example, the dimension d1 of the plate body 122 along the first direction X may be, but is not limited to, 2 mm, 5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 18 mm, 20 mm, etc.

[0126] By setting the dimension d1 of the plate body 122 along the first direction X to be greater than or equal to 2 mm, the structural strength of the plate body 122 can be improved, thereby improving the overall impact resistance of the first beam 12; by setting the dimension d1 of the plate body 122 along the first direction X to be less than or equal to 20 mm, the volume of the plate body 122 can be reduced, thereby reducing the overall space occupancy of the first beam 12.

[0127] In some embodiments, the dimension d1 of the plate body 122 along the first direction X is 4 mm to 8 mm, which can further improve the balance between the impact resistance and space occupancy of the first beam 12 .

[0128] As an example, the dimension d1 of the plate body 122 along the first direction X may be, but is not limited to, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, etc.

[0129] In some embodiments, the box body 10 further includes a buffer member 14 , which is connected to a side of the plate body 122 facing away from the accommodating space 11 , and an elastic modulus of the buffer member 14 is smaller than an elastic modulus of the plate body 122 .

[0130] The buffer member 14 can be detachably connected to the plate 122 or integrally formed on the plate 122. The buffer member 14 can be directly connected to the plate 122 or secured to the plate 122 by other components. For example, the buffer member 14 can be connected to the plate 122 by, but is not limited to, bolting, clamping, riveting, or bonding.

[0131] Optionally, the buffer member 14 may be, but is not limited to, a sheet-like structure or a block-like structure.

[0132] Optionally, the buffer member 14 may be made of, but not limited to, foam, rubber, polyurethane foam, or expandable polypropylene.

[0133] The buffer member 14 of the above technical solution can serve as a protective barrier, which can preferentially deform and absorb energy when the battery device 2 is subjected to external impact or vibration, effectively reducing the impact peak transmitted to the first beam 12 and reducing the impact energy directly acting on the first beam 12, thereby further improving the reliability of the battery device 2.

[0134] As an example, the elastic modulus of the buffer 14 and the plate 122 can be tested with reference to the national standard GBT22315-2008 “Test method for elastic modulus and Poisson's ratio of metallic materials”.

[0135] In some embodiments, the elastic modulus of the buffer member 14 is smaller than the elastic modulus of the beam body 121 .

[0136] In some embodiments, there are multiple buffer members 14 , and the multiple buffer members 14 are spaced apart along the second direction Y, which can further improve the buffering effect of the buffer members 14 on the first beam 12 .

[0137] For example, the number of the buffer members 14 may be two, three, four or more.

[0138] In some embodiments, the buffer member 14 may be configured as a multi-layer structure, such as a composite structure of a soft foam layer, a middle shock-absorbing rubber layer, and an outer protective layer, to improve its buffering and weather resistance capabilities.

[0139] In some embodiments, a through hole is defined in the plate body 122 , and the through hole passes through the plate body 122 along the first direction X.

[0140] When the plate body 122 receives an external force, it can release a certain amount of stress, thereby helping to reduce the risk of stress concentration on the plate body 122 and improve the reliability of the plate body 122.

[0141] In some embodiments, there are multiple through holes, and the multiple through holes are spaced apart along the second direction Y. This can further improve the stress release effect of the through holes.

[0142] Illustratively, the number of through holes may be two, three, four or more.

[0143] In some embodiments, in the same plane perpendicular to the second direction Y, the orthographic projection of the buffer 14 covers the orthographic projection of the through hole.

[0144] In some embodiments, the number of the first beams 12 is two, and the two first beams 12 are respectively disposed on two sides of the accommodating space 11 along the first direction X.

[0145] In some embodiments, the box 10 further includes two second beams 15, which are respectively disposed on either side of the accommodating space 11 along the second direction Y. The second beams 15 are connected between the two first beams 12. The second beams 15 can support the two first beams 12 to improve the overall structural stability of the box 10.

[0146] For example, the two first beams 12 and the two second beams 15 enclose and form the accommodation space 11. The second beams 15 may also be called expansion beams.

[0147] The second beam 15 can be detachably connected to the first beam 12 or integrally provided on the first beam 12. The second beam 15 can be directly connected to the first beam 12 or secured to the first beam 12 via other components. For example, the connection between the second beam 15 and the first beam 12 can be, but is not limited to, welding, bolting, clamping, riveting, or bonding.

[0148] Optionally, the second beam 15 may be made of, but is not limited to, high-strength aluminum alloy or stainless steel.

[0149] The second beam 15 and the first beam 12 may be made of the same material or different materials.

[0150] As an example, the second beam 15 and the first beam 12 are made of the same material, which can simplify the manufacturing process of the first beam 12 and reduce costs.

[0151] In some embodiments, a cavity is defined inside the second beam 15 , and the cavity extends along the first direction X. The cavity can absorb impact energy. For example, the cavity passes through the second beam 15 along the first direction X.

[0152] Optionally, the shape of the cross section of the cavity perpendicular to the first direction X may be, but is not limited to, a rectangle, an ellipse, or a honeycomb.

[0153] In some embodiments, the second beam 15 is connected to both the beam body 121 and the plate body 122 , which can improve the connection reliability between the second beam 15 and the first beam 12 .

[0154] In some embodiments, the box 10 further includes a third beam 16 disposed in the receiving space 11 and connected between the two first beams 12. The third beam 16 can support the two first beams 12 to further improve the overall structural stability of the box 10.

[0155] The third beam 16 can be detachably connected to the first beam 12 or integrally provided on the first beam 12. The third beam 16 can be directly connected to the first beam 12 or secured to the first beam 12 via other components. For example, the connection between the third beam 16 and the first beam 12 can be, but is not limited to, welding, bolting, clamping, riveting, or bonding.

[0156] Optionally, the third beam 16 may be made of, but is not limited to, high-strength aluminum alloy or stainless steel.

[0157] The third beam 16 and the first beam 12 may be made of the same material or different materials.

[0158] As an example, the third beam 16 and the first beam 12 are made of the same material, which can simplify the manufacturing process of the first beam 12 and reduce costs.

[0159] In some embodiments, a cavity is defined inside the third beam 16 , and the cavity extends along the first direction X. The cavity can absorb impact energy. For example, the cavity passes through the third beam 16 along the first direction X.

[0160] In some embodiments, the third beam 16 is spaced apart from the second beam 15 along the second direction Y.

[0161] In some embodiments, the third beam 16 is connected to both the beam body 121 and the plate body 122 , which can improve the connection reliability between the third beam 16 and the first beam 12 .

[0162] In some embodiments, a mounting member is provided on the beam body 121 .

[0163] In some embodiments, the battery device 2 further includes a cover connected to the box 10 to enclose the receiving space 11 . The cover includes a first sidewall connected to the beam 121 and located on a side of the plate 122 facing away from the receiving space 11 .

[0164] The cover and the box body 10 are buckled together to seal the accommodating space 11. The sealing here refers to covering or closing, which can be sealed or non-sealed.

[0165] The first side wall can be directly connected to the beam body 121, or can be restricted on the beam body 121 by other components. As an example, the connection method between the first side wall and the beam body 121 can be, but is not limited to, welding, bolting, clamping, riveting, or bonding.

[0166] The first side wall is located on the side of the plate body 122 facing away from the accommodating space 11, so that the first side wall can play a certain protective role for the plate body 122. When the battery device 2 is subjected to external impact or vibration, the impact peak value transmitted to the plate body 122 can be reduced, the impact energy directly acting on the plate body 122 can be reduced, and the risk of damage to the plate body 122 can be reduced.

[0167] In some embodiments, the first side wall is attached to a surface of the plate 122 facing away from the receiving space 11 .

[0168] In some embodiments, the box 10 further includes a buffer 14 disposed between the plate 122 and the first sidewall. The buffer 14 can separate the plate 122 and the first sidewall to reduce the risk of abnormal noise caused by the first sidewall and the plate 122 colliding with each other, thereby improving the quality of the battery device 2.

[0169] In some embodiments, the elastic modulus of the buffer 14 is smaller than the elastic modulus of the first sidewall.

[0170] In some embodiments, the first side wall is inclined toward one side surface of the plate body 122 , and the inclination direction of the first side wall toward one side surface of the plate body 122 matches the inclination direction of the third surface 1222 .

[0171] On the one hand, the first side wall is inclined toward the side surface of the plate body 122, which can significantly improve the smoothness of demolding after the first side wall is formed; on the other hand, the inclination direction of the side surface of the first side wall toward the plate body 122 is adapted to the inclination direction of the third surface 1222, which can improve the structural compactness of the box body 10.

[0172] In some embodiments, the box 10 can be used as part of a chassis structure of a vehicle. For example, a portion of the box 10 can become at least a portion of a floor of the vehicle, or a portion of the box 10 can become at least a portion of a cross member and a longitudinal member of the vehicle.

[0173] According to some embodiments of the present application, the present application further provides an electrical device, comprising a battery device 2 according to any of the above solutions, wherein the battery device 2 is used to store or provide electrical energy.

[0174] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. All technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0175] To better understand the battery device 2 provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery device 2 in actual application is provided herein for illustration.

[0176] An embodiment of the present application provides a battery device 2, comprising a housing 10 and a battery cell 20. The housing 10 comprises a storage space 11, a first beam 12, a bottom plate 13, and a plurality of buffer members 14. The first beam 12 is disposed on at least one side of the storage space 11 along a first direction X and extends along a second direction Y. The first beam 12 comprises a beam body 121 and a plate body 122. The plate body 122 is connected to a side surface of the beam body 121 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The battery cell 20 is accommodated in the storage space 11 and supported by the bottom plate 13. A cavity 1211 is defined within the beam body 121. The plate body 122 is a solid structure. The dimension of the plate body 122 along the first direction X is smaller than the dimension of the beam body 121 along the first direction X.

[0177] The bottom plate 13 is arranged on one side of the accommodating space 11 along the third direction Z, the first beam 12 is connected to the bottom plate 13, the plate body 122 has a first surface 1221 facing the accommodating space 11, and the bottom plate 13 has a second surface 131 facing the accommodating space 11, and the first surface 1221 is perpendicular to the second surface 131.

[0178] The plate body 122 has a third surface 1222 facing away from the accommodating space 11. The third surface 1222 is inclined relative to the first surface 1221. The angle a between the plane of the third surface 1222 and the plane of the second surface 131, which points toward the accommodating space 11, is acute. In the third direction Z, approaching the beam body 121, the dimension of the plate body 122 along the first direction X gradually increases. The dimension d1 of the plate body 122 along the first direction X is 4 mm to 8 mm.

[0179] The buffer member 14 is connected to a side of the plate 122 facing away from the accommodating space 11 . The plurality of buffer members 14 are spaced apart along the second direction Y. The elastic modulus of the buffer member 14 is smaller than that of the plate 122 .

[0180] The first beam 12 of the above-described technical solution utilizes a combined design of a beam body 121 having a cavity 1211 and a solid plate body 122. The cavity 1211 within the beam body 121 serves as an energy absorber, ensuring the first beam 12's anti-collision performance. The solid plate body 122, while providing a certain degree of protection, effectively reduces the overall volume of the first beam 12, thereby reducing the overall space occupied by the first beam 12. This effectively balances the reliability and energy density of the battery device 2.

[0181] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: The box body includes a storage space and a first beam, wherein the first beam is arranged on at least one side of the storage space along a first direction and extends along a second direction, the first beam includes a beam body and a plate body, the plate body is connected to a side surface of the beam body along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; A battery cell is accommodated in the accommodation space; A cavity is provided inside the beam body, the plate body is a solid structure, and a dimension of the plate body along the first direction is smaller than a dimension of the beam body along the first direction.

2. The battery device according to claim 1, wherein: In the third direction and in the direction close to the beam body, the size of the plate body along the first direction tends to gradually increase.

3. The battery device according to claim 1, wherein: The box body further includes a bottom plate, the bottom plate is arranged on one side of the accommodation space along the third direction, the first beam is connected to the bottom plate, and the battery cell is supported on the bottom plate; The plate body has a first surface facing the accommodation space, the bottom plate has a second surface facing the accommodation space, and the first surface is perpendicular to the second surface.

4. The battery device according to claim 3, characterized in that The plate body has a third surface facing away from the accommodation space, and the third surface is inclined relative to the first surface; An angle between a plane where the third surface is located and a plane where the second surface is located and pointing to the accommodation space is an acute angle.

5. The battery device according to claim 4, characterized in that The plate body has a fourth surface facing away from the beam body, the fourth surface is connected between the first surface and the third surface, and the fourth surface is bent away from the beam body along the third direction.

6. The battery device according to claim 1, wherein: The size of the plate along the first direction is 2 mm to 20 mm.

7. The battery device according to claim 6, characterized in that The size of the plate along the first direction is 4 mm to 8 mm.

8. The battery device according to claim 1, wherein: The box body further includes a buffer component connected to a side of the plate body facing away from the accommodating space, and an elastic modulus of the buffer component is smaller than an elastic modulus of the plate body.

9. The battery device according to claim 8, characterized in that There are multiple buffer members, and the multiple buffer members are spaced apart along the second direction.

10. The battery device according to claim 1, wherein: The number of the first beams is two, and the two first beams are respectively arranged on two sides of the accommodating space along the first direction.

11. The battery device according to claim 10, characterized in that The box body further includes two second beams, the two second beams are respectively arranged on both sides of the accommodating space along the second direction, and the second beams are connected between the two first beams.

12. The battery device according to claim 10, wherein: The box body further includes a third beam, which is disposed in the accommodating space and connected between the two first beams.

13. The battery device according to any one of claims 1 to 12, characterized in that: The battery device further includes a cover body connected to the box body to close the accommodation space; The cover body includes a first side wall, which is connected to the beam body and is located on a side of the plate body facing away from the accommodating space.

14. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 13, wherein the battery device is used to store or provide electrical energy.

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