Battery device and electric appliance

Abstract

The application relates to the technical field of battery production, in particular to a battery device and a power utilization equipment. The battery device comprises a battery monomer and a box body, the box body comprises a first box body and a second box body, the first box body and the second box body are connected through buckling and enclose a containing space, the battery monomer is arranged in the containing space, and the first box body is arranged below the second box body along the gravity direction; at least part of the first box body is a hollow structure, and a buffer is arranged in the hollow structure; the buffer comprises a plurality of spherical structures, and the diameters of at least two spherical structures are different. According to the embodiment of the application, the first box body and the second box body are arranged, the first box body is arranged below the second box body along the gravity direction, at least part of the first box body is a hollow structure, and a buffer is arranged in the hollow structure, so that the buffer in the hollow structure can improve the impact resistance of at least part of the first box body and improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more particularly to a battery device and electrical equipment. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] With the increasing maturity of new energy technologies, new energy vehicles and other electrical equipment are gradually entering the public eye. The core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the entire vehicle.

[0004] The battery device includes a housing and battery cells. The housing includes a first housing and a second housing, which are fastened together to enclose a receiving space. The battery cells are placed in the receiving space. The first housing is located below the second housing along the direction of gravity. The first housing has poor impact resistance, which reduces the reliability of the battery device. Utility Model Content

[0005] In view of the above problems, this application provides a battery device and an electrical device that solves the problem that the first housing of the battery device in the prior art has poor impact resistance, which reduces the reliability of the battery device.

[0006] A first aspect of the embodiments of this application provides a battery device, comprising:

[0007] Battery cells; and

[0008] The housing includes a first housing and a second housing. The first housing and the second housing are fastened together and enclose a receiving space. The battery cell is placed in the receiving space. The first housing is located below the second housing along the direction of gravity.

[0009] At least part of the first box is a hollow structure, and a buffer is provided inside the hollow structure. The buffer includes multiple spherical structures, and at least two of the spherical structures have different diameters.

[0010] The embodiments of this application provide a first housing and a second housing, wherein the first housing is located below the second housing along the direction of gravity, and at least a portion of the first housing is a hollow structure. The hollow structure contains a buffer element, which includes multiple spherical structures, and at least two of the spherical structures have different diameters. This allows the buffer element within the hollow structure to improve the impact resistance of at least a portion of the first housing and enhance the reliability of the battery device.

[0011] In some embodiments of this application, the first housing includes a first plate and a second plate that are connected to each other, the first plate and the second plate forming an accommodating space, and at least one of the first plate and the second plate is a hollow structure.

[0012] The embodiments of this application improve the impact resistance of at least one of the first and second plates by setting up a first plate and a second plate that are interconnected, forming an accommodating space, and by making at least one of the first plate and the second plate a hollow structure, thereby improving the reliability of the battery device.

[0013] In some embodiments of this application, two adjacent spherical structures are fitted together.

[0014] The embodiments of this application, by fitting two adjacent spherical structures together, can utilize the collision between the two adjacent spherical structures, as well as the collision between the buffer and the wall of the hollow structure, to achieve the effect of energy dissipation, improve the impact resistance of the first housing, and thus improve the reliability of the battery device.

[0015] In some embodiments of this application, at least some of the spherical structures are distributed within the hollow structure in a close-packed hexagonal structure, a face-centered cubic structure, or a body-centered cubic structure.

[0016] The embodiments of this application can increase the density of the buffer within the hollow structure by distributing at least spherical structures in a close-packed hexagonal, face-centered cubic, or body-centered cubic structure, thereby improving the impact resistance of the first housing and thus enhancing the reliability of the battery device.

[0017] In some embodiments of this application, the multiple spherical structures include first spheres and second spheres with different diameters, the diameter of the first sphere being larger than the diameter of the second sphere; there are multiple first spheres, and the multiple first spheres are distributed in a close-packed hexagonal structure or a face-centered cubic structure, wherein any group of six adjacent first spheres surrounds an octahedral gap, and the octahedral gap is filled with a second sphere.

[0018] The embodiments of this application include multiple spherical structures comprising first spheres and second spheres with different diameters, wherein the diameter of the first sphere is larger than the diameter of the second sphere; there are multiple first spheres, and the multiple first spheres are distributed in a close-packed hexagonal structure or a face-centered cubic structure, with any group of six adjacent first spheres forming an octahedral gap, and the second sphere filling the octahedral gap formed by any group of six adjacent first spheres. This increases the density of the second spheres in the hollow structure, thereby improving the impact resistance of the first housing and thus improving the reliability of the battery device.

[0019] In some embodiments of this application, the plurality of spherical structures further include a third sphere, the diameter of which is smaller than that of the second sphere, and any group of four adjacent first spheres encloses a tetrahedral gap, which is filled with the third sphere.

[0020] The embodiments of this application include a third sphere, wherein the diameter of the third sphere is smaller than the diameter of the second sphere, and any group of four adjacent first spheres encloses a tetrahedral gap, which is filled with the third sphere. This allows the third sphere to fill the tetrahedral gap formed by any group of four adjacent first spheres, thereby increasing the distribution density of the third sphere within the hollow structure, improving the impact resistance of the first housing, and thus enhancing the reliability of the battery device.

[0021] In some embodiments of this application, the diameter ratio of the first sphere to the second sphere is 1:0.1 to 1:0.414; and / or, the diameter ratio of the first sphere to the third sphere is 1:1 to 1:0.225.

[0022] In the embodiments of this application, by setting the diameter ratio of the first sphere and the second sphere to 1:0.1 to 1:0.414; and / or setting the diameter ratio of the first sphere and the third sphere to 1:1 to 1:0.225, the filling arrangement of the second sphere and the third sphere can be realized, thereby improving the stability of the distribution of the first sphere, the second sphere and the third sphere within the hollow structure, increasing the distribution density of the first sphere, the second sphere and the third sphere within the hollow structure, improving the impact resistance of the first housing, and thus improving the reliability of the battery device.

[0023] In some embodiments of this application, the number of first spheres is greater than or equal to the number of second spheres; and / or, the ratio of the number of first spheres to the number of third spheres is 1:1 to 1:2.

[0024] In the embodiments of this application, by making the number of first spheres greater than or equal to the number of second spheres; and / or by making the ratio of the number of first spheres to the number of third spheres 1:1 to 1:2, the hollow structure can be filled with as many spherical structures as possible, thereby improving the distribution density and stability of spherical structures within the hollow structure.

[0025] In some embodiments of this application, the multiple spherical structures include first spheres and second spheres with different diameters, the diameter of the first sphere being larger than the diameter of the second sphere; there are multiple first spheres, and the multiple first spheres are distributed in a body-centered cubic structure, wherein any group of six adjacent first spheres surrounds an octahedral gap, and the octahedral gap is filled with second spheres.

[0026] The embodiments of this application include multiple spherical structures comprising first spheres and second spheres with different diameters, wherein the diameter of the first sphere is larger than the diameter of the second sphere; there are multiple first spheres, and the multiple first spheres are distributed in a body-centered cubic structure; the second spheres fill the octahedral gaps formed by any group of six adjacent first spheres, thereby increasing the density of the second spheres in the hollow structure, which can improve the impact resistance of the first housing and thus improve the reliability of the battery device.

[0027] In some embodiments of this application, the plurality of spherical structures further include a third sphere, the diameter of which is smaller than that of the second sphere, and any group of four adjacent first spheres encloses a tetrahedral gap, which is filled with the third sphere.

[0028] The embodiments of this application provide a third sphere, wherein the diameter of the third sphere is smaller than the diameter of the second sphere, and the third sphere fills the tetrahedral gap enclosed by any group of four adjacent first spheres. This increases the density of the third sphere within the hollow structure, improves the impact resistance of the first housing, and thus improves the reliability of the battery device.

[0029] In some embodiments of this application, the diameter ratio of the first sphere to the second sphere is 1:0.1 to 1:0.291; and / or, the diameter ratio of the first sphere to the third sphere is 1:0.1 to 1:0.154.

[0030] In the embodiments of this application, by setting the diameter ratio of the first sphere to the second sphere to 1:0.1 to 1:0.291; and / or setting the diameter ratio of the first sphere to the third sphere to 1:0.1 to 1:0.154, the filling arrangement of the second sphere and the third sphere can be realized, thereby improving the stability of the distribution of the first sphere, the second sphere and the third sphere within the hollow structure, increasing the distribution density of the first sphere, the second sphere and the third sphere within the hollow structure, improving the impact resistance of the first housing, and thus improving the reliability of the battery device.

[0031] In some embodiments of this application, the ratio of the number of the first sphere to the number of the second sphere is 1:1 to 1:6; and / or, the ratio of the number of the first sphere to the number of the third sphere is 1:1 to 1:3.

[0032] In the embodiments of this application, by setting the ratio of the number of the first sphere to the number of the second sphere to 1:1 to 1:6; and / or setting the ratio of the number of the first sphere to the number of the third sphere to 1:1 to 1:3, the hollow structure can be filled with as many spherical structures as possible, thereby improving the distribution density and stability of the spherical structures within the hollow structure.

[0033] In some embodiments of this application, the spherical structure is a hollow structure.

[0034] The embodiments of this application reduce the weight of the spherical structure by making it a hollow structure, thereby reducing the weight of the first housing and achieving a lightweight design for the battery device.

[0035] The second aspect of this application provides an electrical device that includes the battery device mentioned in the above embodiments, the battery device being used to supply power to the electrical device.

[0036] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This application provides a schematic diagram of the structure of an electrical device according to some embodiments;

[0039] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0040] Figure 3 for Figure 2 A schematic diagram of the structure of the first box along the cross section AA shown;

[0041] Figure 4 A schematic diagram of the distribution structure of the spherical structure provided in some embodiments of this application (multiple first spheres are distributed in a face-centered cubic structure, and multiple first spheres surround octahedral gaps);

[0042] Figure 5 for Figure 4 The diagram shows the distribution of the spherical structure (multiple first spheres are distributed in a face-centered cubic structure, and multiple first spheres surround tetrahedral gaps);

[0043] Figure 6 A schematic diagram of the distribution structure of the spherical structure provided in some embodiments of this application (multiple first spheres are distributed in a closely packed hexagonal structure, and multiple first spheres surround octahedral gaps);

[0044] Figure 7 for Figure 6 The diagram shows the distribution of the spherical structure (multiple first spheres are arranged in a closely packed hexagonal structure, and multiple first spheres surround tetrahedral gaps);

[0045] Figure 8 A schematic diagram of the distribution structure of the spherical structure provided in some embodiments of this application (multiple first spheres are distributed in a body-centered cubic structure, and multiple first spheres surround octahedral gaps);

[0046] Figure 9 for Figure 8 The diagram shows the distribution of the spherical structure (multiple first spheres are distributed in a body-centered cubic structure, and multiple first spheres surround tetrahedral gaps).

[0047] The attached figures are labeled as follows:

[0048] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0049] 10. Battery cells;

[0050] 20. Box body; 21. First box body; 211. First panel; 212. Second panel; 213. Hollow structure; 22. Second box body; 23. Accommodation space;

[0051] 30. Buffer component; 31. First sphere; 32. Second sphere; 33. Third sphere. Detailed Implementation

[0052] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0054] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0055] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0057] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0058] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0060] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0061] The battery devices described in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. Such electrical equipment can be composed of battery cells and battery devices as described in this application.

[0062] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0063] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all batteries including housings and electrical equipment using batteries.

[0064] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0065] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0066] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0067] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0068] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0069] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0070] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0071] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0072] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0073] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. Current collectors without the positive active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. Current collectors without the negative active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0075] The battery device includes a housing and battery cells. The housing includes a first housing and a second housing, which are fastened together to enclose a receiving space. The battery cells are placed in the receiving space. The first housing is located below the second housing along the direction of gravity. The first housing has poor impact resistance, which reduces the reliability of the battery device.

[0076] To address this problem, embodiments of this application propose a battery device comprising a battery cell and a housing. The housing includes a first housing and a second housing, which are fastened together to enclose a receiving space. The battery cell is disposed within the receiving space, and the first housing is positioned below the second housing along the direction of gravity. At least a portion of the first housing is a hollow structure, and a buffer element is provided within the hollow structure. The buffer element comprises multiple spherical structures, with at least two spherical structures having different diameters. By configuring the first and second housings, with the first housing positioned below the second housing along the direction of gravity, and with at least a portion of the first housing being a hollow structure containing a buffer element comprising multiple spherical structures with at least two spherical structures of different diameters, embodiments of this application can improve the impact resistance of at least a portion of the first housing, thereby enhancing the reliability of the battery device.

[0077] The battery device in the embodiments of this application can be used in electrical equipment such as vehicles, or can be installed in electrical equipment that requires the installation of a battery device in advance.

[0078] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below.

[0079] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0080] Combination Figure 1 As shown, vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, the battery device 100 can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.

[0081] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0082] like Figure 2 As shown, an embodiment of this application also provides a battery device 100, including a housing 20 and a battery cell 10. The housing 20 has a receiving space 23, and the battery cell 10 is installed in the receiving space 23.

[0083] In some embodiments, such as Figure 2 As shown, the housing 20 may include a first housing 21 and a second housing 22, which overlap each other, together defining a receiving space 23 for accommodating the battery cell 10. Both the first housing 21 and the second housing 22 can be hollow structures with one open end, with the second housing 22 covering the open side of the first housing 21, so that the first housing 21 and the second housing 22 together define the receiving space; alternatively, the second housing 22 can be a plate-like structure, and the first housing 21 can be a hollow structure with one open side, with the open side of the second housing 22 covering the open side of the first housing 21. Of course, the housing 20 formed by the first housing 21 and the second housing 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0084] Specifically, such as Figure 2 and Figure 3 As shown, the first box 21 and the second box 22 are fastened together to form an accommodating space 23. The battery cell 10 is disposed in the accommodating space 23. The first box 21 is disposed below the second box 22 along the direction of gravity. At least part of the first box 21 is a hollow structure 213, and a buffer 30 is provided inside the hollow structure 213. The buffer 30 includes multiple spherical structures, and at least two spherical structures have different diameters.

[0085] It should be noted that the first housing 21 has a box-like structure and is usually located below the second housing 22. When the battery device 100 is installed on the electrical equipment, it is easily subjected to external impact. Therefore, it is necessary to focus on improving the impact resistance of the first housing 21. The second housing 22 can also adopt the same structure as the first housing 21. Alternatively, the second housing 22 can also adopt a solid plate structure.

[0086] The embodiments of this application provide a first housing 21 and a second housing 22, wherein the first housing 21 is located below the second housing 22 along the direction of gravity, and at least a portion of the first housing 21 is a hollow structure 213. A buffer 30 is provided inside the hollow structure 213. The buffer 30 includes multiple spherical structures, and at least two of the spherical structures have different diameters. This allows the buffer 30 inside the hollow structure 213 to improve the impact resistance of at least a portion of the first housing 21, improve the reliability of the battery device 100, and fully utilize the space inside the hollow structure 213.

[0087] like Figure 2 As shown, the first box 21 includes a first plate 211 and a second plate 212 connected to each other. The first plate 211 and the second plate 212 form an accommodating space 23. At least one of the first plate 211 and the second plate 212 is a hollow structure 213.

[0088] The first plate 211 can be a bottom plate and the second plate 212 can be a side plate, or the first plate 211 can be a side plate and the second plate 212 can be a bottom plate. The side plate can be rectangular and the bottom plate can be flat. Alternatively, when the battery device 100 adopts other shapes, the side plate can be an annular plate and the bottom plate can be flat.

[0089] The embodiments of this application, by setting up a first plate 211 and a second plate 212 that are interconnected, the first plate 211 and the second plate 212 form an accommodating space 23, and at least one of the first plate 211 and the second plate 212 is a hollow structure 213, can improve the impact resistance of at least one of the first plate 211 and the second plate 212 and improve the reliability of the battery device 100.

[0090] Specifically, the first plate 211 can be configured as a hollow structure 213, with a buffer 30 inside, thereby improving the impact resistance of the first plate 211. Optionally, the second plate 212 can also be configured as a hollow structure 213, with a buffer 30 inside, thereby improving the impact resistance of the second plate 212.

[0091] Preferably, both the first plate 211 and the second plate 212 are hollow structures 213, and a buffer element 30 is provided inside the hollow structure 213, thereby improving the impact resistance of the first plate 211 and the second plate 212. Compared with a structure where both the first plate 211 and the second plate 212 are solid plates, the impact resistance of the first plate 211 and the second plate 212 is significantly improved.

[0092] Optionally, two adjacent spherical structures are fitted together. It should be noted that there are multiple spherical structures, and all of them are housed within the hollow structure 213. The contact arrangement between two adjacent spherical structures allows for a buffering effect through collisions between them, improving the impact resistance of the first housing 21 and thus enhancing the reliability of the battery device.

[0093] The spherical structure can be in a free state within the hollow structure 213, meaning it is not fixed and can move within the hollow structure 213. Alternatively, the spherical structure can also be fixed within the hollow structure 213, such as by fixing it to the wall of the hollow structure 213, thus reducing the probability of the spherical structure moving freely.

[0094] like Figures 4 to 9 As shown, at least some of the spherical structures are distributed within the hollow structure 213 in a close-packed hexagonal structure, a face-centered cubic structure, or a body-centered cubic structure.

[0095] The close-packed hexagonal structure, face-centered cubic structure, and body-centered cubic structure here are stacking methods of spherical structures, which can realize the close-packing of spherical structures, thereby increasing the distribution density of spherical structures within the hollow structure 213 and improving the space utilization of the hollow structure 213.

[0096] The embodiments of this application can increase the distribution density of the buffer 30 in the hollow structure 213 by distributing at least a portion of the spherical structure in a close-packed hexagonal structure, face-centered cubic structure or body-centered cubic structure within the hollow structure 213, thereby improving the impact resistance of the first housing 21 and thus improving the reliability of the battery device 100.

[0097] Optionally, such as Figures 4 to 7 As shown, the multiple spherical structures include first spheres 31 and second spheres 32 with different diameters. The diameter of the first sphere 31 is larger than that of the second sphere 32. There are multiple first spheres 31, and the multiple first spheres 31 are distributed in a close-packed hexagonal structure or a face-centered cubic structure. In any group of six adjacent first spheres 31, an octahedral gap is formed, and the octahedral gap is filled with second spheres 32.

[0098] It should be noted that multiple first spheres 31 are arranged within the hollow structure 213. Any group of six adjacent first spheres 31 encloses an octahedral gap, and second spheres 32 fill this gap. Considering that the maximum size of the octahedral gap is smaller than the radius of the first sphere 31, the diameter of the second sphere 32 is smaller than the diameter of the first sphere 31. The size of the second sphere 32 can be smaller than or equal to the maximum size of the octahedral gap. Here, the maximum size of the octahedral gap refers to the radius of the largest sphere that can be accommodated within the octahedral gap.

[0099] The embodiments of this application include multiple spherical structures comprising first spheres 31 and second spheres 32 with different diameters, wherein the diameter of the first sphere 31 is larger than the diameter of the second sphere 32; the number of first spheres 31 is multiple, and the multiple first spheres 31 are distributed in a close-packed hexagonal structure or a face-centered cubic structure; the second spheres 32 fill the octahedral gaps enclosed by any group of six adjacent first spheres 31, thereby increasing the density of the second spheres 32 in the hollow structure 213, thereby improving the impact resistance of the first housing 21 and thus improving the reliability of the battery device.

[0100] Optionally, such as Figures 4 to 7 As shown, the multiple spherical structures also include a third sphere 33, the diameter of which is smaller than the diameter of the second sphere 32. Any group of four adjacent first spheres 31 forms a tetrahedral gap, and the third sphere 33 fills within the tetrahedral gap formed by the four adjacent first spheres 31. Specifically, the four first spheres 31 form a tetrahedral gap.

[0101] Since the maximum size of the tetrahedral gap is smaller than the maximum size of the octahedral gap, the diameter of the third sphere 33 is smaller than the diameter of the second sphere 32. The maximum size of the tetrahedral gap mentioned here refers to the radius of the largest sphere that can be contained within the tetrahedral gap.

[0102] The embodiments of this application provide a third sphere 33, wherein the diameter of the third sphere 33 is smaller than the diameter of the second sphere 32, and the third sphere 33 fills the tetrahedral gap enclosed by any group of four adjacent first spheres 31. This increases the density of the third sphere 33 within the hollow structure 213, improves the impact resistance of the first housing 21, and thus improves the reliability of the battery device 100.

[0103] In some embodiments of this application, the diameter ratio of the first sphere 31 to the second sphere 32 is 1:0.1 to 1:0.414, such as 1:0.1, 1:0.2, 1:0.3 or 1:0.414. The diameter ratio of the first sphere 31 to the third sphere 33 is 1:1 to 1:0.225, such as 1:0.1, 1:0.2 or 1:0.225.

[0104] In embodiments of this application, by setting the diameter ratio of the first sphere 31 to the second sphere 32 to 1:0.1 to 1:0.414, the second sphere 32 can fill the octahedral gap enclosed by any group of six adjacent first spheres 31. Furthermore, in embodiments of this application, by setting the diameter ratio of the first sphere 31 to the third sphere 33 to 1:0.1 to 1:0.225, the third sphere 33 can fill the tetrahedral gap enclosed by any group of four adjacent first spheres 31.

[0105] Optionally, the diameter ratio of the first sphere 31, the second sphere 32, and the third sphere 33 is 1:0.414:0.225.

[0106] The diameters of the second sphere 32 and the third sphere 33 can also be smaller. That is, the diameter of the second sphere 32 can be less than 0.414 times the diameter of the first sphere 31, such as 0.3 times the diameter of the first sphere 31. The diameter of the third sphere 33 can be less than 0.225 times the diameter of the first sphere 31, such as 0.2 times the diameter of the first sphere 31.

[0107] In the embodiments of this application, by setting the diameter ratio of the first sphere 31, the second sphere 32, and the third sphere 33 to 1:0.414:0.225, the maximum arrangement of the second sphere 32 and the third sphere 33 can be achieved. This improves the stability of the distribution of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure 213, increases the distribution density of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure 213, improves the impact resistance of the first housing 21, and thus improves the reliability of the battery device 100.

[0108] In some embodiments of this application, the number of first spheres 31 is greater than or equal to the number of second spheres 32. In this case, the second spheres 32 can be disposed within the partial octahedral gaps enclosed by the first spheres 31. The ratio of the number of first spheres 31 to the number of third spheres 33 is 1:1 to 1:2, such as the ratio of the number of first spheres 31 to the number of third spheres 33 being 1:1, 1:1.5, or 1:2. In this case, the first spheres 31 fill at least a portion of the tetrahedral gaps enclosed by any group of four adjacent first spheres 31.

[0109] In some embodiments of this application, the ratio of the number of the first sphere 31, the second sphere 32, and the third sphere 33 is 1:1:2.

[0110] It should be noted that the hollow structure 213 contains multiple structural units formed by a first sphere 31, a second sphere 32, and a third sphere 33. Considering that the first sphere 31 will be shared by multiple structural units, the ratio of the number of the first sphere 31, the second sphere 32, and the third sphere 33 is set to 1:1:2. This allows the second sphere 32 to be placed in the octahedral gaps enclosed by the six first spheres 31, and the third sphere 33 to be placed in the tetrahedral gaps enclosed by the four first spheres 31. This maximizes the distribution density of the spherical structure within the hollow structure 213 and improves the impact resistance of the first box 21.

[0111] In the embodiments of this application, by setting the ratio of the first sphere 31, the second sphere 32, and the third sphere 33 to 1:1:2, the hollow structure 213 can be filled with as many spherical structures as possible, thereby improving the distribution density and stability of the spherical structures within the hollow structure 213.

[0112] Continue to refer to Figure 8 and Figure 9 As shown, multiple first spheres 31 are distributed in a body-centered cubic structure, wherein second spheres 32 fill the octahedral gaps enclosed by any group of six adjacent first spheres 31. In this embodiment, the first spheres 31 are distributed in a body-centered cubic structure, and six first spheres 31 enclose octahedral gaps.

[0113] The embodiments of this application include multiple spherical structures comprising first spheres 31 and second spheres 32 with different diameters, wherein the diameter of the first sphere 31 is larger than the diameter of the second sphere 32; the number of first spheres 31 is multiple, and the multiple first spheres 31 are distributed in a body-centered cubic structure; the second spheres 32 fill the octahedral gaps enclosed by any group of six adjacent first spheres 31, thereby increasing the distribution density of the second spheres 32 within the hollow structure 213, thereby improving the impact resistance of the first housing 21 and thus improving the reliability of the battery device.

[0114] Optionally, the third sphere 33 fills the tetrahedral gap enclosed by any group of four adjacent first spheres 31, wherein the first spheres 31 are distributed in a three-dimensional cubic structure.

[0115] In the embodiments of this application, by filling the tetrahedral gaps formed by any group of four adjacent first spheres 31 with the third sphere 33, the density of the third sphere 33 within the hollow structure 213 can be increased, thereby improving the impact resistance of the first housing 21 and thus enhancing the reliability of the battery device.

[0116] Optionally, the diameter ratio of the first sphere 31 to the second sphere 32 is 1:0.1 to 1:0.291, such as 1:0.1, 1:0.2, or 1:0.291; the diameter ratio of the first sphere 31 to the third sphere 33 is 1:0.1 to 1:0.154, such as 1:0.1, 1:0.2, or 1:0.291. This allows for the filling arrangement of the second sphere 32 and the third sphere 33, thereby improving the stability of the distribution of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure, increasing the distribution density of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure 213, improving the impact resistance of the first housing 21, and thus improving the reliability of the battery device 100.

[0117] In some embodiments of this application, the diameter ratio of the first sphere 31, the second sphere 32, and the third sphere 33 is 1:0.291:0.154.

[0118] The diameters of the second sphere 32 and the third sphere 33 can also be smaller. That is, the diameter of the second sphere 32 can be less than 0.291 times the diameter of the first sphere 31, such as 0.2 times the diameter of the first sphere 31. The diameter of the third sphere 33 can be less than 0.154 times the diameter of the first sphere 31, such as 0.1 times the diameter of the first sphere 31.

[0119] In the embodiments of this application, by setting the diameter ratio of the first sphere 31, the second sphere 32, and the third sphere 33 to 1:0.291:0.154, the maximum arrangement of the second sphere 32 and the third sphere 33 can be achieved. This improves the stability of the distribution of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure 213, increases the distribution density of the first sphere 31, the second sphere 32, and the third sphere 33 within the hollow structure 213, improves the impact resistance of the first housing 21, and thus improves the reliability of the battery device.

[0120] Optionally, the ratio of the number of the first sphere 31 to the number of the second sphere 32 is 1:1 to 1:6, such as 1:1, 1:2, 1:3, 1:4, 1:5 or 1:6; the ratio of the number of the first sphere 31 to the number of the third sphere 33 is 1:1 to 1:3, such as 1:1, 1:2 or 1:3. This allows the hollow structure to be filled with as many spherical structures as possible, thereby improving the distribution density and stability of the spherical structures within the hollow structure.

[0121] Optionally, the ratio of the number of the first sphere 31, the second sphere 32, and the third sphere 33 is 1:6:3.

[0122] It should be noted that the hollow structure 213 contains multiple structural units formed by a first sphere 31, a second sphere 32, and a third sphere 33. Considering that the first sphere 31 will be shared by multiple structural units, the ratio of the number of the first sphere 31, the second sphere 32, and the third sphere 33 is set to 1:6:3. This allows the second sphere 32 to be placed in the octahedral gaps enclosed by the six first spheres 31, and the third sphere 33 to be placed in the tetrahedral gaps enclosed by the four first spheres 31. This maximizes the distribution density of the spherical structure within the hollow structure 213 and improves the impact resistance of the first box 21.

[0123] In the embodiments of this application, by setting the ratio of the first sphere 31, the second sphere 32, and the third sphere 33 to 1:6:3, the hollow structure 213 can be filled with as many spherical structures as possible, thereby improving the distribution density and stability of the spherical structures within the hollow structure 213.

[0124] Optionally, the spherical structure is a hollow structure. A hollow structure means that the interior of the spherical structure is hollow, which can reduce the weight of the spherical structure. Specifically, the first sphere 31, the second sphere 32, and the third sphere 33 can all be set as hollow structures, thereby reducing the total weight of the spherical structure and thus reducing the total weight of the first box 21.

[0125] The embodiments of this application reduce the weight of the spherical structure by setting it to a hollow structure, thereby reducing the weight of the first housing 21 and achieving a lightweight design of the battery device 100.

[0126] In the embodiments of this application, the buffer 30 inside the first housing 21 has an energy absorption effect close to elastoplastic deformation when compressed by 10 mm. Based on the buffer calculation method of discrete element-finite element coupling, the hollow spherical structure of this application, compared with the solution using aluminum foam, enables the first housing 21 to have better impact resistance and achieve a buffering effect.

[0127] Alternatively, the spherical structure can be made of metallic materials, such as aluminum alloy, magnesium alloy or titanium alloy, which are lightweight and have high strength.

[0128] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below.

[0129] A first aspect of this application provides a battery device, including a battery cell 10 and a housing 20. The housing 20 includes a first housing 21 and a second housing 22, which are fastened together to enclose a receiving space 23. The battery cell 10 is disposed within the receiving space 23, and the first housing 21 is disposed below the second housing 22 along the direction of gravity. At least a portion of the first housing 21 is a hollow structure 213, and a buffer member 30 is provided within the hollow structure 213. Further, the first housing 21 includes a first plate 211 and a second plate 212 connected to each other, which enclose the receiving space 23. At least one of the first plate 211 and the second plate 212 is a hollow structure 213. Further, two adjacent spherical structures are fitted together. Further, at least a portion of the spherical structures are distributed within the hollow structure 213 in a close-packed hexagonal structure, a face-centered cubic structure, or a body-centered cubic structure. Furthermore, the multiple spherical structures include first spheres 31 and second spheres 32 with different diameters, wherein the diameter of the first sphere 31 is larger than the diameter of the second sphere 32; there are multiple first spheres 31, and the multiple first spheres 31 are distributed in a close-packed hexagonal structure or a face-centered cubic structure, wherein any group of six adjacent first spheres 31 encloses an octahedral gap, and the octahedral gap is filled with second spheres 32. Furthermore, the multiple spherical structures also include a third sphere 33, the diameter of the third sphere 33 is smaller than the diameter of the second sphere 32, and any group of four adjacent first spheres 31 encloses a tetrahedral gap, and the tetrahedral gap is filled with third spheres 33. Furthermore, the diameter ratio of the first sphere 31 to the second sphere 32 is 1:0.1 to 1:0.414, and / or, the diameter ratio of the first sphere 31 to the third sphere 33 is 1:0.1 to 1:0.225. Further, the number of first spheres 31 is greater than or equal to the number of second spheres 32, and / or the ratio of the number of first spheres 31 to the number of second spheres 32 is 1:1 to 1:2. Further, the plurality of spherical structures includes first spheres 31 and second spheres 32 with different diameters, wherein the diameter of the first sphere 31 is greater than the diameter of the second sphere 32; the number of first spheres 31 is plurality, and the plurality of first spheres 31 are distributed in a body-centered cubic structure, wherein any group of six adjacent first spheres 31 encloses an octahedral gap, and the second spheres 32 fill the octahedral gap. Further, the plurality of spherical structures also includes a third sphere 33, the diameter of the third sphere 33 is smaller than the diameter of the second sphere 32, any group of four adjacent first spheres 31 encloses a tetrahedral gap, and the third sphere 33 fills the tetrahedral gap. Furthermore, the diameter ratio of the first sphere 31 to the second sphere 32 is 1:0.1 to 1:0.291, and / or the diameter ratio of the first sphere 31 to the third sphere 33 is 1:0.1 to 1:0.154. Furthermore, the quantity ratio of the first sphere 31 to the second sphere 32 is 1:1 to 1:6, and / or the quantity ratio of the first sphere 31 to the third sphere 33 is 1:1 to 1:3.Furthermore, the spherical structure is a hollow structure.

[0130] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell; as well as The housing includes a first housing and a second housing, which are fastened together to enclose a receiving space. The battery cell is disposed within the receiving space, and the first housing is disposed below the second housing along the direction of gravity. At least a portion of the first housing is a hollow structure, and a buffer element is provided inside the hollow structure. The buffer element includes multiple spherical structures, and at least two of the spherical structures have different diameters.

2. The battery device as claimed in claim 1, characterized in that, The first box includes a first plate and a second plate that are connected to each other, the first plate and the second plate forming the receiving space, and at least one of the first plate and the second plate is a hollow structure.

3. The battery device as claimed in claim 1, characterized in that, The two adjacent spherical structures are fitted together.

4. The battery device as claimed in claim 3, characterized in that, At least some of the spherical structures are distributed within the hollow structure in a close-packed hexagonal structure, a face-centered cubic structure, or a body-centered cubic structure.

5. The battery device as claimed in claim 4, characterized in that, The plurality of spherical structures include a first sphere and a second sphere with different diameters, wherein the diameter of the first sphere is larger than the diameter of the second sphere; The number of the first spheres is multiple, and the multiple first spheres are distributed in the close-packed hexagonal structure or the face-centered cubic structure, wherein any group of six adjacent first spheres surrounds an octahedral gap, and the octahedral gap is filled with the second sphere.

6. The battery device as claimed in claim 5, characterized in that, The plurality of spherical structures further include a third sphere, the diameter of which is smaller than that of the second sphere, and any group of four adjacent first spheres encloses a tetrahedral gap, the tetrahedral gap being filled by the third sphere.

7. The battery device as claimed in claim 6, characterized in that, The diameter ratio of the first sphere to the second sphere is 1:0.1 to 1:0.414; and / or, the diameter ratio of the first sphere to the third sphere is 1:0.1 to 1:0.

225.

8. The battery device as claimed in claim 6, characterized in that, The number of the first spheres is greater than or equal to the number of the second spheres; and / or, the ratio of the number of the first spheres to the number of the third spheres is 1:1 to 1:

2.

9. The battery device as claimed in claim 4, characterized in that, The plurality of spherical structures include a first sphere and a second sphere with different diameters, wherein the diameter of the first sphere is larger than the diameter of the second sphere; The number of the first spheres is multiple, and the multiple first spheres are distributed in the body-centered cubic structure, wherein any group of six adjacent first spheres surrounds an octahedral gap, and the octahedral gap is filled with the second sphere.

10. The battery device as claimed in claim 9, characterized in that, The plurality of spherical structures further include a third sphere, the diameter of which is smaller than that of the second sphere, and any group of four adjacent first spheres encloses a tetrahedral gap, the tetrahedral gap being filled by the third sphere.

11. The battery device as claimed in claim 10, characterized in that, The diameter ratio of the first sphere to the second sphere is 1:0.1 to 1:0.291; and / or, the diameter ratio of the first sphere to the third sphere is 1:0.1 to 1:0.

154.

12. The battery device as claimed in claim 10, characterized in that, The ratio of the number of the first sphere to the number of the second sphere is 1:1 to 1:6; and / or the ratio of the number of the first sphere to the number of the third sphere is 1:1 to 1:

3.

13. The battery device according to any one of claims 4 to 12, characterized in that, The spherical structure is a hollow structure.

14. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 13, the battery device being used to supply power to the electrical device.

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