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, a box body and a protection piece. The box body is internally provided with an accommodating space, the battery monomer is arranged in the accommodating space, and the protection piece is connected with the box body and arranged below the box body along the gravity direction. At least part of the protection piece is a composite material piece, and at least part of the protection piece is a hollow structure. The hollow structure is internally provided with an energy-absorbing piece and a buffer piece. The energy-absorbing piece is filled in at least part of the space between the buffer piece and the wall surface of the hollow structure. According to the embodiment of the application, the energy-absorbing piece is filled in at least part of the space between the buffer piece and the wall surface of the hollow structure, and at least part of the protection piece is a composite material piece. Therefore, the buffer performance of the protection piece can be improved by the buffer piece in the hollow structure, the energy-absorbing effect of the energy-absorbing piece in the hollow structure is utilized to improve the impact resistance of the protection piece, the protection of the battery monomer is formed, and the reliability of the battery device is improved.

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, individual battery cells, and protective components. The protective components are located at the bottom of the housing to protect it. The housing has a storage space where the individual battery cells are housed. However, the protective components have 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 appliance that solves the problem of poor impact resistance of the protective components of the battery device in the prior art.

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

[0007] Battery cell;

[0008] The enclosure contains a storage space, within which the individual battery cells are housed; and

[0009] The protective component is connected to the enclosure and is located below the enclosure along the direction of gravity.

[0010] At least some of the protective components are composite material components, and at least some of the protective components are hollow structures. The hollow structures are equipped with energy-absorbing components and buffer components, and the energy-absorbing components fill at least a portion of the space between the buffer components and the wall of the hollow structure.

[0011] The embodiments of this application, by setting at least a portion of the protective components as hollow structures, and providing energy-absorbing components and buffer components within the hollow structures, with the energy-absorbing components filling at least a portion of the space between the buffer components and the walls of the hollow structures, and at least a portion of the protective components being composite material components, can improve the buffering performance of the protective components through the buffer components within the hollow structures, and utilize the energy-absorbing components within the hollow structures to generate energy absorption, thereby improving the impact resistance of the protective components, forming protection for the battery cells, and thus improving the reliability of the battery device.

[0012] In some embodiments of this application, the number of buffers is at least two, and an energy-absorbing element is filled between two adjacent buffers.

[0013] The embodiments of this application increase the number of buffers in the hollow structure by using at least two buffers and filling the space between two adjacent buffers with energy-absorbing elements. This increases the filling rate of the energy-absorbing elements in the hollow structure, thereby improving the impact resistance of the protective components and providing protection for the battery cells.

[0014] In some embodiments of this application, the protective element includes a first housing and a second housing connected to each other, the first housing and the second housing forming a hollow structure, wherein at least one of the first housing and the second housing is a composite material.

[0015] The embodiments of this application include a protective component comprising a first housing and a second housing connected to each other, the first housing and the second housing forming a hollow structure, wherein at least one of the first housing and the second housing is a composite material component. This allows at least one of the first housing and the second housing to be made from a composite material component, thereby reducing the total weight of the protective component and thus reducing the total weight of the battery device.

[0016] In some embodiments of this application, the first housing is connected to the box body, the second housing is disposed away from the box body, and the second housing is a composite material component.

[0017] The embodiments of this application connect the first housing to the box body and set the second housing away from the box body. The second housing is a composite material component, which makes the second housing located at the bottom of the battery device a composite material component. This can improve the impact resistance of the protective component while reducing costs.

[0018] In some embodiments of this application, the composite material part includes a fiber reinforcement.

[0019] The embodiments of this application include fiber reinforcements in the composite material parts, wherein the fiber reinforcements are made of fiber-reinforced composite materials, which are lightweight and have high strength, and can improve the strength of the protective parts. The fiber reinforcements are generally lighter than metal materials, but have more than three times the strength of metal materials.

[0020] In some embodiments of this application, the fiber reinforcement includes one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement.

[0021] The embodiments of this application include one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement, which can be used to manufacture the fiber reinforcement.

[0022] In some embodiments of this application, the buffer includes a spherical structure disposed within a hollow structure.

[0023] The embodiments of this application facilitate the processing of the buffer by including a spherical structure in the buffer and placing the spherical structure inside the hollow structure, and also facilitate the filling of the energy-absorbing element inside the hollow structure.

[0024] In some embodiments of this application, the spherical structure is a hollow structure.

[0025] The embodiments of this application use a hollow spherical structure, which reduces the total weight of the spherical structure, achieves a lightweight design for the protective component, and thus reduces the weight of the battery device.

[0026] In some embodiments of this application, the spherical structure is a hollow metal part.

[0027] The embodiments of this application use hollow metal parts to make the spherical structure, which can reduce the probability of the spherical structure breaking by utilizing the strength of the hollow metal parts. In addition, the cost of the spherical structure can be reduced compared to the spherical structure made of composite materials.

[0028] In some embodiments of this application, the metal parts include one of aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts.

[0029] The embodiments of this application utilize metal parts, including one of aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts, to create spherical structures with good strength and less susceptibility to breakage.

[0030] In some embodiments of this application, the energy-absorbing component includes one of a polyethylene component, a polypropylene component, a polyethylene terephthalate component, an aerogel component, a foam material component, and a silicone rubber component.

[0031] The embodiments of this application, by including one of polyethylene, polypropylene, polyethylene terephthalate, aerogel, foam material, and silicone rubber as the energy-absorbing component, can reduce the possibility of the energy-absorbing component being corroded by the electrolyte or damaged by pressure, improve the reliability of the energy-absorbing component throughout the entire life cycle of the battery device, and extend the service life of the energy-absorbing component; at the same time, it can also reduce the production cost of the energy-absorbing component, thereby reducing the production cost of the battery device.

[0032] 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.

[0033] 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, the following are specific embodiments of this application. Attached Figure Description

[0034] 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:

[0035] Figure 1 This application provides a schematic diagram of the structure of an electrical device according to some embodiments;

[0036] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0037] Figure 3 for Figure 2 A schematic diagram of the protective components of the battery device shown;

[0038] Figure 4 for Figure 3 A schematic cross-sectional view of the protective component of the battery device shown along section AA;

[0039] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the protective components of the battery device along section AA (the buffer and energy-absorbing components are not shown).

[0040] The attached figures are labeled as follows:

[0041] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0042] 10. Battery cells;

[0043] 20. Box body; 21. First box body; 211. First panel; 212. Second panel; 22. Second box body; 23. Storage space;

[0044] 30. Protective component; 31. First housing; 32. Second housing; 33. Hollow structure;

[0045] 40. Energy-absorbing components;

[0046] 50. Buffer components. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] A battery cell consists of a battery cell and an electrolyte. The battery cell is composed 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 battery cells can be of a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0069] 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.

[0070] The battery device includes a housing, individual battery cells, and protective components. The protective components are located at the bottom of the housing to protect it. The housing has a storage space where the individual battery cells are housed. However, the protective components have poor impact resistance, which reduces the reliability of the battery device.

[0071] To address this problem, this application proposes a battery device comprising a battery cell, a housing, and a protective component. The battery cell is disposed within a housing space, and the protective component is connected to the housing and positioned below the housing along the direction of gravity. At least a portion of the protective component is a composite material and is a hollow structure. The hollow structure contains an energy-absorbing component and a buffer component, with the energy-absorbing component filling at least a portion of the space between the buffer component and the wall of the hollow structure. By filling the space between the buffer component and the wall of the hollow structure, this application's embodiment enhances the buffering performance of the protective component through the buffer component within the hollow structure and utilizes the energy-absorbing component within the hollow structure to absorb energy, thereby improving the impact resistance of the protective component, protecting the battery cell, and ultimately improving the reliability of the battery device.

[0072] 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.

[0073] 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, the following are specific embodiments of this application.

[0074] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0075] 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.

[0076] 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.

[0077] like Figure 2 As shown, an embodiment of this application also provides a battery device 100, including a battery housing 20 and a battery cell 10. The battery housing 20 has a receiving space 23, and the battery cell 10 is installed in the receiving space 23.

[0078] In some embodiments, such as Figure 2As shown, the battery 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 battery 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.

[0079] Specifically, such as Figure 2 As shown, the first box 21 and the second box 22 are fastened together to form a receiving space 23. The battery cell 10 is placed in the receiving space 23, and the first box 21 is located below the second box 22 along the direction of gravity.

[0080] It should be noted that the first housing 21 has a box-shaped 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, a protective component 30 is provided below the first housing 21 to protect the first housing 21.

[0081] The buffer 50 here can be in various shapes, such as an M-shaped or N-shaped structure. It can utilize the elasticity and plasticity of the buffer 50 itself to achieve the effect of energy attenuation, thereby improving the impact resistance of the protective component 30.

[0082] The protective component 30 mentioned here is a component that protects the first housing 21. It is usually a plate-shaped structure and can also be called a bottom protective plate.

[0083] like Figure 3 and Figure 4 As shown, at least a portion of the protective component 30 is a composite material component, and at least a portion of the protective component 30 is a hollow structure. The hollow structure 33 is provided with an energy-absorbing component 40 and a buffer component 50. The energy-absorbing component 40 fills at least a portion of the space between the buffer component 50 and the wall of the hollow structure 33.

[0084] The hollow structure 33 mentioned here refers to the protective component 30 adopting a hollow plate structure, and the hollow structure 33 can be filled with energy-absorbing component 40 and buffer component 50. The energy-absorbing component 40 is a component used to absorb impact force. Understandably, when the protective component 30 is subjected to impact force, the impact force is transmitted to the energy-absorbing component 40 and causes the energy-absorbing component 40 to deform, thereby absorbing the impact force. The energy-absorbing component 40 can have a certain degree of elasticity; in other words, the energy-absorbing component 40 can be made of elastic material, such as, but not limited to, nylon, polyoxymethylene, and synthetic resin. The buffer component 50 can also absorb impact force and deform after being impacted, thereby improving the impact resistance of the protective component 30.

[0085] In the embodiments of this application, at least a portion of the protective element 30 is configured as a hollow structure 33, and the hollow structure 33 is provided with an energy-absorbing element 40 and a buffer element 50. The energy-absorbing element 40 fills at least a portion of the space between the buffer element 50 and the wall of the hollow structure 33. The buffer element 50 in the hollow structure 33 can improve the buffering performance of the protective element 30, and the energy-absorbing element 40 in the hollow structure 33 can generate an energy-absorbing effect, thereby improving the impact resistance of the protective element 30 and forming protection for the first housing 21 and the battery cell 10, thereby improving the reliability of the battery device 100.

[0086] The number of buffer components 50 here can be one, and the other spaces within the hollow structure 33 can be filled with energy-absorbing components 40. "At least part of the protective component 30 is a composite material" means that at least part of the protective component 30 is made of composite materials. The composite material here can be a common composite material, which has higher structural strength and can improve the impact resistance of the protective component 30 compared to using metal components.

[0087] like Figure 4 As shown, alternatively, the number of buffer members 50 is at least two, and the energy-absorbing member 40 fills the space between at least partially adjacent two buffer members 50. Figure 4 In the hollow structure 33, there are multiple buffer components 50, and the multiple buffer components 50 are distributed in multiple rows and columns inside the hollow structure 33, which can improve the overall strength of the protective component 30.

[0088] The embodiments of this application increase the number of buffers 50 in the hollow structure 33 by having at least two buffers 50 and filling the space between two adjacent buffers 50 with energy-absorbing elements 40. This increases the filling rate of energy-absorbing elements 40 in the hollow structure 33, thereby improving the impact resistance of the protective element 30 and providing protection for the battery cell 10.

[0089] Optionally, such as Figure 4As shown, the protective component 30 includes a first housing 31 and a second housing 32 that are connected to each other. The first housing 31 and the second housing 32 form a hollow structure 33, wherein at least one of the first housing 31 and the second housing 32 is a composite material component.

[0090] It should be noted that the first box 21 includes a first plate 211 and a second plate 212, wherein the first plate 211 is the bottom plate and the second plate 212 is the side plate, and the second plate 212 and the first plate 211 form an accommodating space 23.

[0091] It should be noted that the first housing 31 and the second housing 32 can be fastened together or connected by screws or the like. The first housing 31 and the second housing 32 form a hollow structure 33. The first housing 31 and the second housing 32 can both be composite materials, or the first housing 31 can be a composite material and the second housing 32 can be a metal part, or the first housing 31 can be a metal part and the second housing 32 can be a composite material.

[0092] Alternatively, the second plate 212 can also adopt the same structure, with the second plate 212 and the first plate 211 connected to each other, either by bonding or by bolts. Of course, to facilitate the connection between the second plate 212 and the first plate 211, a connecting plate can be provided at the connection position between the first plate 211 and the second plate 212, and bolts can be used for connection by providing connecting holes on the connecting plate.

[0093] The embodiments of this application include a protective member 30 comprising a first housing 31 and a second housing 32 connected to each other, the first housing 31 and the second housing 32 forming a hollow structure 33, wherein at least one of the first housing 31 and the second housing 32 is a composite material, so that at least one of the first housing 31 and the second housing 32 can be made of a composite material, which facilitates the reduction of the total weight of the protective member 30, thereby reducing the total weight of the battery device 100.

[0094] Specifically, the first housing 31 is connected to the box 20, and the second housing 32 is disposed away from the box 20, wherein the second housing 32 is a composite material component.

[0095] In the embodiment, the first housing 31 is located above the second housing 32 and is connected to the first box 21. Therefore, the impact resistance requirement for the first housing 31 is lower than that for the second housing 32. Thus, in the embodiments of this application, only the second housing 32 can be set as a composite material part, and the first housing 31 can be made of metal or other materials to reduce the cost of the protective part 30.

[0096] In the embodiments of this application, by connecting the first housing 31 to the box 20 and setting the second housing 32 away from the box 20, wherein the second housing 32 is a composite material, the second housing 32 located at the bottom of the battery device 100 can be a composite material, thereby improving the impact resistance of the protective component 30 while reducing costs.

[0097] Optionally, the first housing 31 and the second housing 32 can also be composite material parts, which can better protect the first housing 21, improve the impact resistance of the protective part 30, and reduce the weight of the protective part 30.

[0098] Optionally, the composite material part includes fiber reinforcement. Here, fiber reinforcement refers to a product made of fiber-reinforced plastic, where the reinforcing fibers can be glass fibers, carbon fibers, or boron fibers, etc., used to provide strength and rigidity to the material.

[0099] The embodiments of this application include fiber reinforcements in the composite material parts, wherein the fiber reinforcements are made of fiber-reinforced composite materials, which are lightweight and have high strength, and can improve the strength of the protective part 30. The fiber reinforcements are generally lighter than metal materials, but have more than three times the strength of metal materials.

[0100] Optionally, the fiber reinforcement includes one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement.

[0101] Among them, carbon fiber reinforced components are parts made of carbon fiber reinforced composite materials. Fiber reinforced composite materials are composite materials formed by using carbon fiber or carbon fiber fabric as reinforcement and resin, ceramics, metals, cement, carbonaceous materials, or rubber as the matrix. Glass fiber reinforced components are parts made of glass fiber reinforced plastics. Aramid fiber reinforced components are parts made of aramid fiber reinforced plastics. These fiber reinforced components can enable the protective component 30 to have high strength and low weight, thereby improving the strength of the protective component 30 and reducing its weight.

[0102] The embodiments of this application include one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement, which can be used to manufacture the fiber reinforcement.

[0103] Optionally, such as Figure 4 and Figure 5 As shown, the buffer 50 includes a spherical structure, which is disposed within the hollow structure 33.

[0104] There are multiple spherical structures here, and these spherical structures are arranged in a distribution pattern of one row and multiple columns, multiple rows and multiple columns, or multiple rows and one column. Energy-absorbing components 40 are filled between adjacent spherical structures, thereby further improving the impact resistance of the protective component 30 through the energy-absorbing components 40.

[0105] The embodiments of this application, by including a spherical structure in the buffer 50 and placing the spherical structure inside the hollow structure 33, facilitate the processing of the buffer 50, the placement of the spherical structure inside the hollow structure 33, and the filling of the energy-absorbing member 40 inside the hollow structure 33.

[0106] Optionally, the spherical structure can be hollow. Here, "hollow structure" refers to a spherical structure with a hollow interior, which reduces its weight.

[0107] The embodiments of this application use a hollow spherical structure, which reduces the total weight of the spherical structure and achieves a lightweight design for the protective component 30, thereby reducing the weight of the battery device.

[0108] Optionally, embodiments of this application may also provide a reinforcing layer on the outer surface of the spherical structure, wherein the strength of the reinforcing layer is greater than the strength of the spherical structure, thereby increasing the strength of the buffer 50 and reducing the probability of the buffer 50 breaking.

[0109] Optionally, the spherical structure is a hollow metal component. Here, "hollow metal component" refers to the fact that the spherical structure can be made of metal, possessing high strength and a certain degree of plastic deformation capability, thus enabling it to absorb impact energy.

[0110] The embodiments of this application use hollow metal parts to make the spherical structure, which can reduce the probability of the spherical structure breaking by utilizing the strength of the metal parts. In addition, the cost of the spherical structure can be reduced compared to the spherical structure made of composite materials.

[0111] As mentioned earlier, spherical structures are usually made of metal, but spherical structures can also be made of other materials, such as plastic, which can also improve the impact resistance of the protective component 30.

[0112] Optionally, the metal parts include one of aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts.

[0113] It should be noted that aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts are all common components in existing technologies. Among them, steel alloy parts can be stainless steel parts or carbon steel parts, which can give the spherical structure good strength and reduce the probability of the spherical structure breaking.

[0114] The embodiments of this application utilize metal parts, including one of aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts, to create spherical structures with good strength and less susceptibility to breakage.

[0115] Optionally, the energy-absorbing component 40 includes one of a polyethylene component, a polypropylene component, a polyethylene terephthalate component, an aerogel component, a foam material component, and a silicone rubber component.

[0116] Among them, polyethylene parts are components made of polyethylene material, polypropylene parts are components made of polypropylene material, polyethylene terephthalate parts are components made of polyethylene terephthalate material, aerogel parts are components made of aerogel material, foamed material parts are components made of foamed material, and silicone rubber parts are components made of silicone rubber material. All of these components can absorb the impact force of the energy-absorbing component 40.

[0117] The embodiments of this application include the energy-absorbing component 40 in one of the following materials: polyethylene, polypropylene, polyethylene terephthalate, aerogel, foam material, and silicone rubber. This reduces the possibility of the energy-absorbing component 40 being corroded by the electrolyte or damaged by pressure, improves the reliability of the energy-absorbing component 40 throughout the entire life cycle of the battery device, and extends the service life of the energy-absorbing component 40. At the same time, it can also reduce the production cost of the energy-absorbing component 40, thereby reducing the production cost of the battery device 100.

[0118] It should be noted that the foamed material components here can be made of structural foam material or foamed polypropylene material, which has high strength and good elasticity, and can resist impact.

[0119] It should be noted that both the energy-absorbing component 40 and the buffer component 50 here have good strength. The buffer component 50 can make the protective component 30 have high strength. The energy-absorbing component 40 fills the remaining space in the hollow structure 33 of the protective component 30, which can realize the utilization rate of the space in the hollow structure 33, thereby further improving the strength and impact resistance of the protective component 30.

[0120] Furthermore, during the process of placing the energy-absorbing component 40 and the buffer component 50 into the hollow structure 33, the first housing 31 and the second housing 32 can be set separately first, the buffer component 50 can be placed into the hollow structure 33, and then the granular energy-absorbing component 40 can be filled into the space between adjacent buffer components 50 and between the inner wall surface of the buffer component 50 and the protective component 30. After the hollow structure 33 is completely filled, the first housing 31 and the second housing 32 can be connected. Specifically, this can be achieved using equipment such as a foaming machine.

[0121] Alternatively, an opening can be provided on the first housing 31 or the second housing 32 to allow the energy-absorbing element 40 to be filled, and then the opening can be closed.

[0122] Optionally, there can be multiple spherical structures, and the outer diameters of the multiple spherical structures can be the same or different. When there are multiple outer diameters of the spherical structures, the sizes of the spherical structures are different, which can also play a buffering role.

[0123] 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, the following are specific embodiments of this application.

[0124] A first aspect of the embodiments of this application provides a battery device, which includes a battery cell 10, a housing 20, and a protective member 30. The housing 20 has a receiving space 23, and the battery cell 10 is disposed within the receiving space 23. The protective member 30 is connected to the housing 20 and is disposed below the housing 20 along the direction of gravity. At least a portion of the protective member 30 is a composite material, and at least a portion of the protective member 30 is a hollow structure 33. The hollow structure 33 contains an energy-absorbing member 40 and a buffer member 50, with the energy-absorbing member 40 filling at least a portion of the space between the buffer member 50 and the wall of the hollow structure 33. Further, the number of buffer members 50 is at least two, with an energy-absorbing member 40 filling the space between two adjacent buffer members 50. Further, the protective member 30 includes a first housing 31 and a second housing 32 connected to each other, the first housing 31 and the second housing 32 forming the hollow structure 33, wherein at least one of the first housing 31 and the second housing 32 is a composite material. Further, the first shell 31 is connected to the housing 20, and the second shell 32 is disposed away from the housing 20, wherein the second shell 32 is a composite material component. Further, the composite material component includes a fiber-reinforced component. Further, the fiber-reinforced component includes one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement. Further, the buffer component 50 includes a spherical structure disposed within the hollow structure 33. Further, the spherical structure is a hollow structure. Further, the spherical structure is a hollow metal component. Further, the metal component includes one of aluminum alloy, magnesium alloy, titanium alloy, and steel alloy. Further, the energy-absorbing component 40 includes one of polyethylene, polypropylene, polyethylene terephthalate, aerogel, foam material, and silicone rubber.

[0125] 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; The housing has a storage space inside, and the battery cell is disposed within the storage space; as well as A protective component, which is connected to the housing and is located below the housing along the direction of gravity; At least a portion of the protective components are composite material components, and at least a portion of the protective components are hollow structures. The hollow structures contain energy-absorbing components and buffer components, with the energy-absorbing components filling at least a portion of the space between the buffer components and the walls of the hollow structures.

2. The battery device as claimed in claim 1, characterized in that, The number of buffers is at least two, and the energy-absorbing element is filled between two adjacent buffers.

3. The battery device as claimed in claim 1, characterized in that, The protective component includes a first housing and a second housing that are connected to each other, the first housing and the second housing forming the hollow structure, wherein at least one of the first housing and the second housing is a composite material.

4. The battery device as claimed in claim 3, characterized in that, The first housing is connected to the box body, and the second housing is disposed away from the box body, wherein the second housing is the composite material component.

5. The battery device as claimed in claim 3, characterized in that, The composite material component includes fiber-reinforced components.

6. The battery device as claimed in claim 5, characterized in that, The fiber reinforcement includes one of carbon fiber reinforcement, glass fiber reinforcement, and aramid fiber reinforcement.

7. The battery device according to any one of claims 1 to 6, characterized in that, The buffer includes a spherical structure disposed within the hollow structure.

8. The battery device as claimed in claim 7, characterized in that, The spherical structure is a hollow structure.

9. The battery device as claimed in claim 8, characterized in that, The spherical structure is a hollow metal component.

10. The battery device as claimed in claim 9, characterized in that, The metal parts include one of aluminum alloy parts, magnesium alloy parts, titanium alloy parts, and steel alloy parts.

11. The battery device according to any one of claims 1 to 6, characterized in that, The energy-absorbing component includes one of the following: polyethylene, polypropylene, polyethylene terephthalate, aerogel, foam material, and silicone rubber.

12. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 11, the battery device being used to supply power to the electrical device.

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