Battery device and electric device

Abstract

The application relates to a battery device and a power utilization device. The battery device comprises a battery cell and a box assembly. The box assembly comprises an inner container assembly and a frame. An accommodating cavity is arranged at one end of the inner container assembly, the battery cell is arranged in the accommodating cavity, and the frame is arranged around the opening and connected with the inner container assembly. The inner container assembly comprises at least one metal layer and at least one composite material layer which are stacked. Compared with the inner container assembly prepared by using only one kind of material, the battery device provided by the application has the inner container assembly with the metal layer stacked with the composite material layer. Because the corrosion resistance of the composite material layer is stronger than that of the metal layer, and the weldability of the metal layer is stronger than that of the composite material layer, the structural strength, impact resistance, weldability and corrosion resistance of the whole inner container assembly are improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] The enclosure is a crucial component that houses the individual battery cells, providing them with a suitable operating space to ensure their proper functioning. The performance of the enclosure directly impacts the operation of the battery cells; therefore, there is an urgent need for a high-performance enclosure to offer the best possible operating space for the battery cells. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can alleviate the problem of poor performance of the housing affecting the operation of individual battery cells.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell and a housing assembly. The housing assembly includes an inner liner assembly and a frame. One end of the inner liner assembly has an opening with a receiving cavity, in which the battery cell is disposed. The frame is disposed around the opening and connected to the inner liner assembly. The inner liner assembly includes at least one stacked metal layer and at least one composite material layer.

[0006] In the technical solution of this application embodiment, compared with using only one material to prepare the inner liner assembly, the inner liner assembly using a metal layer stacked with a composite material layer has better corrosion resistance than the metal layer and better weldability than the composite material layer. Therefore, the overall structural strength, impact resistance, weldability and corrosion resistance of the inner liner assembly are improved.

[0007] In some embodiments, when there are multiple metal layers and multiple composite material layers, the metal layers and composite material layers are stacked in a cross manner.

[0008] In this way, the number of metal and composite material layers can be adjusted according to needs, improving the thermal insulation and impact resistance of the entire inner liner assembly.

[0009] In some embodiments, the structure of the composite material layer is configured as a composite material basin, the structure of the metal layer is configured as a metal basin, at least one metal basin forms a metal edge at the opening, the metal edge extends in a direction away from the receiving cavity and is connected to the frame.

[0010] Thus, by constructing both the composite material layer and the metal layer in a basin shape, the structure of each layer of the inner liner assembly is simplified, facilitating its processing. Due to the inherent material properties of the composite material basin, a metal rim is required at the opening of the metal basin to connect it to the frame. The number of metal rims can be determined based on current requirements.

[0011] In some embodiments, the inner liner assembly includes a first composite material basin, a metal basin, and a second composite material basin stacked sequentially, with an adhesive layer provided between each pair of the first composite material basin, the metal basin, and the second composite material basin.

[0012] The above configuration can simplify the structure of the inner liner assembly as much as possible without affecting its performance, and improve the connection stability between the various basins of the inner resistance assembly.

[0013] In some embodiments, the metal basin includes a metal basin body located between a first composite material basin and a second composite material basin. One end of a metal edge is connected to the metal basin body, and the other end extends out of the opening toward the frame. The metal edge includes a plurality of bends, some of which abut against the frame, and others of which are supported by the frame.

[0014] This design not only increases the contact area between the metal edge and the frame, but also provides space for welding the metal edge and the frame.

[0015] In some embodiments, the metal basin and the metal edge are integrally formed.

[0016] This design not only improves the connection strength between the metal basin and the metal edge, but also simplifies the processing of the metal basin and the metal edge.

[0017] In some embodiments, the metal basin further includes a metal bottom wall and a metal side wall, the metal side wall is disposed around the metal bottom wall and together with the metal bottom wall forms a metal basin body, and the end of the metal side wall away from the metal bottom wall is connected to a metal edge.

[0018] At the opening, at least one wall surface of the metal sidewall is provided with a first mating part, and the first composite material basin and / or the second composite material basin is provided with a second mating part, the corresponding second mating part abutting against the corresponding first mating part.

[0019] When the inner liner assembly is subjected to cyclic load, that is, when the inner liner assembly is subjected to force in reciprocating vibration, the first mating part and the second mating part can provide a certain support force, reduce the probability of separation of the metal basin, the first composite material basin and the second composite material, and improve the connection stability between the three.

[0020] In some embodiments, both sides of the metal sidewall are provided with a first mating portion, and the shape of the first mating portion is configured as a sawtooth.

[0021] This design not only improves the connection stability between the metal basin, the first composite material basin, and the second composite material, but also simplifies the structure of the first mating part and the second mating part, and reduces the processing difficulty of the first mating part and the second mating part.

[0022] In some embodiments, the first mating portion extends from the opening along the depth direction of the metal basin, wherein the length of the first mating portion is L, where L > 50 mm.

[0023] While ensuring that the first mating part meets the usage requirements, the length of the first mating part is limited, which allows for flexible setting of the length of the first mating part and reduces the difficulty of setting the first mating part.

[0024] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments.

[0025] 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

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. 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:

[0027] Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments.

[0028] Figure 2 This is an exploded view of a battery device according to one or more embodiments.

[0029] Figure 3 This is an exploded structural diagram of a battery cell according to one or more embodiments.

[0030] Figure 4 This is a structural schematic diagram of a housing assembly with a hidden portion of its structure according to one or more embodiments.

[0031] Figure 5 This is a cross-sectional view of a partially concealed structure of a housing assembly according to one or more embodiments.

[0032] Figure 6 This is a cross-sectional view of a partially concealed structure of a housing assembly according to one or more embodiments.

[0033] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0034] The reference numerals in the detailed embodiments are as follows:

[0035] 1000, vehicles;

[0036] 100. Battery assembly; 200. Controller; 300. Motor;

[0037] 10. Housing assembly; 11. First part; 12. Second part; 121. Receiving cavity; 122. Metal layer; 1221. Metal edge; 12211. Bending part; 1222. First mating part; 123. Composite material layer; 1231. Second mating part; 13. Frame; 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Cell assembly. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] In the description of the embodiments of this application, the technical terms "first," "second," etc., 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.

[0041] 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.

[0042] In the description of the embodiments of this application, the term "and / or" merely describes 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In the description of the embodiments of this application, if any, 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).

[0044] In the description of the embodiments of this application, if any technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," or "circumferential" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does 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, it should not be construed as a limitation on the embodiments of this application.

[0045] 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.

[0046] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used 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 power battery applications, market demand is also constantly increasing.

[0047] The battery enclosure is a crucial component of a battery pack, playing a vital role in the safety and protection of individual battery cells. When the battery pack is subjected to impact or strong vibration, the enclosure is the first to be affected. Furthermore, changes in the battery pack's operating environment, such as temperature fluctuations, will alter the internal temperature of the enclosure, impacting the operating efficiency of the individual battery cells. Therefore, a high-performance enclosure is needed to improve the operating efficiency of the individual battery cells.

[0048] Based on the above considerations, in order to address the poor performance of current battery housings, some embodiments of this application provide a battery device including a housing assembly. The housing assembly includes an inner liner assembly and a frame. The inner liner assembly includes at least one stacked metal layer and at least one composite material layer. Compared to using a single material to manufacture the housing, the battery device provided by the embodiments of this application improves the structural strength, impact resistance, weldability, and corrosion resistance of the housing.

[0049] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using battery cells and batteries disclosed in this application.

[0050] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, energy storage products, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and energy storage products can include energy storage stations, etc.

[0051] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0052] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The 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 provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The 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 the vehicle 1000 during starting, navigation, and driving.

[0053] 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.

[0054] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing assembly 10 and a battery cell 20, with the battery cell 20 housed within the housing assembly 10. The housing assembly 10 provides a receiving space for the battery cell 20, and can adopt various structures. In some embodiments, the housing assembly 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a receiving space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the receiving space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing assembly 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0055] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of multiple battery cells 20 is housed within the housing assembly 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form battery modules, and then multiple battery modules connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the housing assembly 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0056] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0057] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery. Figure 3The battery cell 20 includes an end cap 21, a housing 22, a cell assembly 23, and other functional components.

[0058] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Alternatively, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is less prone to deformation under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with cell assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0059] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the cell assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the cell assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0060] The cell assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more cell assemblies 23. The cell assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0061] Please see Figure 4 and Figure 5 Some embodiments of this application provide a battery device 100, which includes a battery cell 20 and a housing assembly 10. The housing assembly 10 includes an inner liner assembly and a frame 13. One end of the inner liner assembly has an opening with a receiving cavity 121, and the receiving cavity 121 contains the battery cell 20. The frame 13 is disposed around the opening and connected to the inner liner assembly. The inner liner assembly includes at least one stacked metal layer 122 and at least one composite material layer 123.

[0062] The frame 13 is used to connect to the inner liner assembly and fix the inner liner assembly to the mounting surface of the vehicle, wherein the frame 13 and the inner liner assembly can be welded together.

[0063] The inner liner assembly corresponds to part 12 in the previous section. The metal layer 122 can be made of materials such as steel, aluminum, and titanium. The composite material layer 123 can be made of resin-based composite material (i.e., fiber-reinforced plastic), which has advantages such as lightweight, high strength, and strong corrosion resistance. The specific number of metal layers 122 and composite material layers 123 can be determined according to the actual situation.

[0064] In some examples, the inner liner assembly may include a metal layer 122 and a composite material layer 123. In other examples, the inner liner assembly includes a metal layer 122 and two composite material layers 123. In still other examples, the inner liner assembly includes two metal layers 122 and two composite material layers 123.

[0065] The following description uses an inner liner assembly comprising a metal layer 122 and a composite material layer 123 as an example. When the metal layer 122 is located inside the composite material layer 123, that is, when the metal layer 122 is located within the receiving cavity 121, the composite material layer 123 is positioned closer to the battery cell 20, which can effectively provide heat insulation. When the composite material layer 123 is located inside the metal layer 122, that is, when the composite material layer 123 is located within the receiving cavity 121, an anti-corrosion layer can be coated on the surface of the metal layer 122 away from the composite material layer 123 to protect the metal layer 122.

[0066] Compared to using only one material to prepare the inner liner assembly, the inner liner assembly with a metal layer 122 stacked with a composite material layer 123 has better corrosion resistance than the metal layer 122, and the metal layer 122 has better weldability than the composite material layer 123. Therefore, the overall structural strength, impact resistance, weldability and corrosion resistance of the inner liner assembly are improved.

[0067] In some embodiments, when there are multiple metal layers 122 and multiple composite material layers 123, the metal layers 122 and the composite material layers 123 are stacked in a cross manner.

[0068] For example, when there are two metal layers 122 and two composite material layers 123, the metal layers 122 and the composite material layers 123 can be stacked in a cross manner, that is, a composite material layer 123 is placed between two metal layers 122.

[0069] In this way, the number of metal layer 122 and composite material layer 123 can be adjusted according to needs, which improves the thermal insulation and impact resistance of the entire inner liner assembly.

[0070] Of course, in other embodiments, the metal layer 122 and the composite material layer 123 may not need to be arranged in an overlapping manner. For example, two metal layers 122 are stacked, and a composite material layer 123 is arranged on each side.

[0071] In some embodiments, the composite material layer 123 is configured as a composite material basin, the metal layer 122 is configured as a metal basin, at least one metal basin has a metal edge 1221 formed at the opening, the metal edge 1221 extends away from the receiving cavity 121 and is connected to the frame 13.

[0072] For example, the inner liner assembly includes two metal basins and two composite material basins, which are stacked sequentially. The stacking method can be that the metal basins and composite material basins are arranged alternately, or that the two metal basins are stacked together, and finally stacked on top of the two composite material basins, etc. In this way, both the composite material layer 123 and the metal layer 122 are constructed in a basin shape, which simplifies the structure of each layer of the inner liner assembly and facilitates its processing.

[0073] One of the two metal basins has a metal edge 1221 at its opening, which can be welded to the frame 13 to connect the inner liner assembly and the frame 13. Alternatively, in other embodiments, both metal basins can have a metal edge 1221 at their openings, meaning both edges 1221 are connected to the frame 13, thus improving the connection strength between the inner liner assembly and the frame 13.

[0074] Therefore, by constructing both the composite material layer 123 and the metal layer 122 in a basin shape, the structure of each layer of the inner liner assembly is simplified, making it easier to process. Due to the limitations of the material properties of the composite material basin itself, a metal edge 1221 needs to be provided at the opening of the metal basin to connect with the frame 13. The number of metal edges 1221 can be determined according to the current requirements.

[0075] like Figure 5 As shown, in some embodiments, the inner liner assembly includes a first composite material basin, a metal basin, and a second composite material basin stacked sequentially, with an adhesive layer between each pair of the first composite material basin, the metal basin, and the second composite material basin.

[0076] The first composite material basin is located inside the receiving cavity 121, and the second composite material basin is located outside the receiving cavity 121. The first composite material basin mainly serves a heat preservation function, while the second composite material basin mainly serves a corrosion protection function, protecting the metal basin. Furthermore, the second composite material basin also provides some heat preservation to further maintain the temperature inside the receiving cavity 121.

[0077] In actual assembly, because the surfaces of the first composite material basin and the metal basin that come into contact with each other are provided with an adhesive layer, and the surfaces of the second composite material basin and the metal basin that come into contact with each other are also provided with an adhesive layer, the connection method between the first composite material basin, the metal basin and the second composite material basin can be simplified and the connection stability can be improved.

[0078] The above configuration can simplify the structure of the inner liner assembly as much as possible without affecting its performance, and improve the connection stability between the various basins of the inner resistance assembly.

[0079] like Figure 5 and Figure 6 As shown, in some embodiments, the metal basin includes a metal basin body located between the first composite material basin and the second composite material basin. One end of the metal edge 1221 is connected to the metal basin body, and the other end extends out of the opening toward the frame 13. The metal edge 1221 includes a plurality of bends 12211, some of which abut against the frame 13, and other bends 12211 are supported by the frame 13.

[0080] For example, the metal edge 1221 extends toward the frame 13 and forms three bends 12211, two of which contact the frame 13, and the last bend 12211, away from the metal basin, overlaps the frame 13. This not only increases the contact area between the metal edge 1221 and the frame 13, but also provides welding space for welding the metal edge 1221 and the frame 13.

[0081] It should be noted that the bent portion 12211 formed by the metal edge 1221 is not limited to... Figure 6 The shape shown may also include two bends 12211 on the metal edge 1221, both of which are in contact with the frame 13, etc.

[0082] In some embodiments, the metal basin and the metal edge 1221 are integrally formed.

[0083] This design not only improves the connection strength between the metal basin and the metal edge 1221, but also simplifies the processing of the metal basin and the metal edge 1221.

[0084] Please see Figure 7 In some embodiments, the metal basin further includes a metal bottom wall and metal side walls. The metal side walls are arranged around the metal bottom wall and together with the metal bottom wall form a metal basin body. The end of the metal side wall away from the metal bottom wall is connected to the metal edge 1221. At the opening, at least one wall surface of the metal side wall is provided with a first mating part 1222, and the first composite material basin and / or the second composite material basin is provided with a second mating part 1231, the corresponding second mating part 1231 abutting against the corresponding first mating part 1222.

[0085] In other words, in the thickness direction of the metal sidewall, the metal sidewall includes two opposing wall surfaces. For ease of explanation, one of the wall surfaces is named the first wall surface, and the other wall surface is named the second wall surface. The first wall surface is in contact with the first composite material basin, and the second wall surface is in contact with the second composite material basin.

[0086] In some examples, the first wall surface is provided with a first mating portion 1222, and the first composite material basin is provided with a second mating portion 1231. In another example, the second wall surface is provided with a first mating portion 1222, and the second composite material basin is provided with a second mating portion 1231. In still other examples, both the first and second wall surfaces are provided with a first mating portion 1222, and the first and second composite material basins are provided with a second mating portion 1231.

[0087] When the metal basin, the first composite material basin, and the second composite material basin are assembled together, the first mating part 1222 abuts against the corresponding second mating part 1231. When the inner liner assembly is subjected to cyclic load, that is, when the inner liner assembly is subjected to force in reciprocating vibration, the first mating part 1222 and the second mating part 1231 can provide a certain supporting force, reduce the probability of separation of the metal basin, the first composite material basin, and the second composite material, and improve the connection stability between the three.

[0088] like Figure 7 As shown, further, in some embodiments, both sides of the metal sidewall are provided with a first mating part 1222, and the shape of the first mating part 1222 is configured as a sawtooth shape.

[0089] This design not only improves the connection stability between the metal basin, the first composite material basin, and the second composite material, but also simplifies the structure of the first mating part 1222 and the second mating part 1231, reducing the processing difficulty of the first mating part 1222 and the second mating part 1231.

[0090] Of course, in other examples, one of the first mating part 1222 and the second mating part 1231 may be constructed as a protrusion and the other as a groove, and the two may be inserted together.

[0091] Furthermore, please continue reading Figure 7 In some embodiments, the first mating portion 1222 extends from the opening along the depth direction of the metal basin, wherein the length of the first mating portion 1222 is L, where L > 50 mm. The maximum length of the first mating portion 1222 can be equal to the length of the metal sidewall.

[0092] While ensuring that the first mating part 1222 meets the usage requirements, the length of the first mating part 1222 is limited, which allows for flexible setting of the length of the first mating part 1222 and reduces the difficulty of setting the first mating part 1222.

[0093] Furthermore, some embodiments of this application also provide an electrical device that includes the battery device 100 described in the above embodiments. Therefore, the electrical device possesses all the beneficial effects of the battery device 100.

[0094] In a specific embodiment, such as Figure 5 As shown, the battery device 100 includes a battery cell 20 and a housing assembly 10. The housing assembly 10 includes an inner liner assembly and a frame 13. The inner liner assembly includes a stacked metal layer 122 and two composite material layers 123. The metal layer 122 is located between the two composite material layers 123, and the metal layer 122 and the composite material layers 123 are bonded together. Both the metal layer 122 and the composite material layers 123 are constructed in a basin shape. The opening of the metal layer 122 has a metal edge 1221, and the metal edge 1221 forms a bend 12211. The last bend 12211 away from the metal basin overlaps the frame 13 for welding.

[0095] Along the thickness direction of the metal layer 122, both metal sidewalls of the metal layer 122 are provided with a first mating part 1222, and both the first composite material basin and the second composite material basin are provided with a second mating part 1231, with the corresponding second mating part 1231 abutting against the corresponding first mating part 1222. All mating parts are constructed in a serrated shape and extend along the depth direction of the inner liner assembly.

[0096] The battery device 100 provided in this application embodiment is different from the inner liner assembly which is made of only one material. It is an inner liner assembly in which a metal layer 122 is stacked with a composite material layer 123. Because the corrosion resistance of the composite material layer 123 is stronger than that of the metal layer 122, and the weldability of the metal layer 122 is stronger than that of the composite material layer 123, the overall structural strength, impact resistance, weldability and corrosion resistance of the inner liner assembly are improved.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: Battery cell; The housing assembly includes an inner liner assembly and a frame. One end of the inner liner assembly has an opening with a receiving cavity, and the battery cell is disposed inside the receiving cavity. The frame is arranged around the opening and connected to the inner liner assembly. The inner liner assembly includes at least one stacked metal layer and at least one composite material layer. The composite material layer is configured as a composite material basin, and the metal layer is configured as a metal basin.

2. The battery device according to claim 1, characterized in that, When there are multiple metal layers and multiple composite material layers, the metal layers and the composite material layers are stacked in a cross manner.

3. The battery device according to claim 2, characterized in that, At least one of the metal basins forms a metal edge in the opening, the metal edge extending away from the receiving cavity and connecting to the frame.

4. The battery device according to claim 3, characterized in that, The inner liner assembly includes a first composite material basin, a metal basin, and a second composite material basin stacked sequentially, with an adhesive layer between each pair of the first composite material basin, the metal basin, and the second composite material basin.

5. The battery device according to claim 4, characterized in that, The metal basin includes a metal basin body located between the first composite material basin and the second composite material basin. One end of the metal edge is connected to the metal basin body, and the other end extends out of the opening toward the frame. The metal edge includes multiple bends, some of which abut against the frame, and others of which are supported by the frame.

6. The battery device according to claim 5, characterized in that, The metal basin and the metal edge are integrally formed.

7. The battery device according to claim 4, characterized in that, The metal basin also includes a metal bottom wall and a metal side wall. The metal side wall is arranged around the metal bottom wall and together with the metal bottom wall forms the metal basin body. The end of the metal side wall away from the metal bottom wall is connected to the metal edge. At the opening, at least one wall surface of the metal sidewall is provided with a first mating part, and the first composite material basin and / or the second composite material basin is provided with a second mating part, the corresponding second mating part abutting against the corresponding first mating part.

8. The battery device according to claim 7, characterized in that, The first mating part is provided on both sides of the metal sidewall, and the first mating part is constructed in a sawtooth shape.

9. The battery device according to claim 7, characterized in that, The first mating part extends from the opening along the depth direction of the metal basin, wherein the length of the first mating part is L, where L > 50 mm.

10. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 9.

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