Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises a box body, the box body comprises a first part and a second part, the second part comprises a first non-metal layer, a second non-metal layer, a metal layer and a hanging part, the first non-metal layer comprises a bottom plate and side plates arranged on the periphery of the bottom plate, and the second non-metal layer comprises a second non-metal layer; a part of the metal layer is arranged between the bottom plate and the second non-metal layer; the mounting part is located on the side, away from the containing space, of the side plate, and the mounting part is connected with the metal layer. According to the scheme provided by the invention, the first non-metal layer can protect the internal metal layer from being corroded, the middle metal layer ensures the structural rigidity of the whole second part, and the second non-metal layer can ensure the insulating property in the second part. When the second part is connected with other parts, the connection reliability can be improved under the support of the metal layer. And meanwhile, the second part adopts a combined structure of the non-metal layer and the metal layer, so that the weight of the whole box body is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery generally comprises a lower box body, a battery module accommodated in the lower box body, and a sealing cover provided on the upper cover of the lower box body.

[0003] In the related art, the lower box body cannot be connected to other components by using a traditional welding process, and the reliability of the connection cannot be guaranteed. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can solve the problem that the connection reliability of the lower box body and other components cannot be guaranteed.

[0005] To solve the above technical problems, in a first aspect, the present application provides a battery device, comprising:

[0006] A box body, the box body comprising a first part and a second part, the first part and the second part being buckled to form an accommodation space;

[0007] The second part comprises a first non-metal layer, a second non-metal layer, a metal layer and a mounting portion, the first non-metal layer comprising a bottom plate and a side plate arranged around the bottom plate, part of the metal layer being arranged between the bottom plate and the second non-metal layer, the bottom plate being located on a side of the metal layer away from the accommodation space, and the second non-metal layer being located on a side of the metal layer facing the accommodation space;

[0008] The mounting portion is located on a side of the side plate away from the accommodation space, and the mounting portion is connected to the metal layer.

[0009] In the technical scheme of the present application, the first non-metal layer can protect the internal metal layer from corrosion and resist external scratching, the metal layer in the middle ensures the structural rigidity of the entire second part, and the second non-metal layer can ensure the insulation performance of the inside of the second part while meeting the electrical safety between the second part and the battery cell located therein. When the second part is connected to other components, the other components can be connected together with the corresponding metal layer, so that the reliability of the connection can be improved under the support of the metal layer. At the same time, since the second part adopts a combined structure of a non-metal layer and a metal layer, the weight of the entire box body is effectively reduced. Moreover, it is convenient to arrange the mounting portion on the second part, and the load on the mounting portion can be dispersed by connecting the mounting portion to the metal layer, thereby avoiding damage to the second part caused by local stress concentration.

[0010] In some embodiments, the metal layer comprises a bending portion, and the bending portion abuts against a side of the side plate facing the accommodation space.

[0011] In this way, the mounting portion is connected with the bending portion, so that the load on the mounting portion can be dispersed, and local stress concentration can be avoided to damage the second part.

[0012] In some embodiments, the battery device further comprises a reinforcing plate fixed to a side of the side plate facing the accommodation space, and the bending portion abuts against a side of the reinforcing plate facing the accommodation space.

[0013] The mounting portion is connected with the side plate, the reinforcing plate, and the bending portion in sequence.

[0014] In this way, the connection strength between the mounting portion, the side plate, and the bending portion can be further improved, so that the mounting portion can be stably connected to the metal layer.

[0015] In some embodiments, the mounting portion comprises a bearing portion and a fixing plate connected in sequence, the bearing portion is used to connect the battery device with other components, the fixing plate is connected to a side of the side plate away from the accommodation space, and the fixing plate is connected with the bending portion.

[0016] In some embodiments, the second part further comprises a fastener and an adhesive layer.

[0017] The adhesive layer is arranged between a side of the side plate away from the accommodation space and the mounting portion.

[0018] The fixing plate is connected with the side plate and the bending portion through the fastener. In this way, not only can the sealing performance of the mounting portion and the side plate away from the accommodation space be ensured, so that foreign matters cannot enter the second part from the gap between the mounting portion and the side plate, but also the mounting portion, the side plate, and the bending portion can be stably connected together through the fastener, and the stability of the connection of the mounting portion is further improved.

[0019] In some embodiments, the second part further comprises a metal edge beam arranged on a side of the side plate away from the accommodation space.

[0020] The metal edge beam is provided with a hanging hole configured to connect other components.

[0021] In this way, when the hanging hole on the metal edge beam is stressed, the stress can be dispersed to the second part, and local stress concentration can be avoided.

[0022] In some embodiments, a side of the metal edge beam facing the bottom plate is provided with an extension plate connected to a side of the bottom plate away from the metal layer.

[0023] In this way, the metal edge beam can be stably connected to the bottom plate, and the side of the bottom plate away from the metal layer can be protected from being scratched.

[0024] In some embodiments, a first flange surface is arranged on the side of the side plate away from the bottom plate, and a second flange surface is arranged on the metal edge beam, and the first flange surface and the second flange surface both extend outward relative to the accommodation space.

[0025] The metal edge beam is arranged on the side of the side plate away from the accommodation space, and the first flange surface is connected to the second flange surface. In this way, the side plate and the metal edge beam can be connected together.

[0026] In some embodiments, at least one of the bottom plate, the second non-metal layer and the metal layer is formed with alternating and continuous protrusions and grooves in the first direction. In this way, the strength of the bottom plate, the second non-metal layer and the metal layer can be improved, thereby improving the strength of the entire second part.

[0027] In some embodiments, the second part further comprises a buffer layer arranged between the second non-metal layer and the metal layer. In this way, when the battery cell is placed on the second non-metal layer, the buffer layer can prevent the second non-metal layer from directly colliding and rubbing against the metal layer.

[0028] In some embodiments, the buffer layer is formed with alternating and continuous protrusions and grooves in the first direction. In this way, the strength of the buffer layer can be improved.

[0029] In a second aspect, the application provides a power-using device comprising the battery device as described in any one of the embodiments of the application.

[0030] The above description is only a summary of the technical solutions of the application. In order to make the technical solutions of the application more clearly understood and implemented, and to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following detailed description of the embodiments of the application is provided. BRIEF DESCRIPTION OF DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The accompanying drawings are included to provide a description of the embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in different drawings represent the same or similar elements. In the drawings:

[0032] Figure 1 A structural schematic diagram of a power-using device provided by some embodiments of the application.

[0033] Figure 2 Structure diagram of a battery provided for some embodiments of the present application;

[0034] Figure 3 Structure diagram of a battery cell provided for some embodiments of the present application;

[0035] Figure 4 Structure diagram of a battery device provided for some embodiments of the present application;

[0036] Figure 5 Exploded view of Figure 4

[0037] Enlarged view of A in Figure 6 Figure 4

[0038] Figure 7 Figure 4 Cross-sectional view along the X-axis direction at the mounting portion.

[0039] Reference signs in the detailed description are as follows:

[0040] 1000, vehicle;

[0041] 100, battery; 200, controller; 300, motor;

[0042] 110, box body; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 123, electrode assembly;

[0043] 1121, first non-metal layer; 11211, bottom plate; 11212, side plate; 112121, first flange surface; 1122, second non-metal layer; 1123, metal layer; 11231, bending portion; 1124, metal edge beam; 11241, hanging hole; 11242, extension plate; 11243, second flange surface; 1125, mounting portion; 11251, bearing portion; 11252, fixing plate; 11253, mounting hole; 1126, buffer layer; 1127, fastener; 1128, adhesive layer; X, second direction; Y, first direction. DETAILED DESCRIPTION

[0044] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0045] ​​​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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments, and is not necessarily used consistently throughout. It will be explicitly understood by one of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0053] In the related art, the battery generally includes a lower box body, a battery module accommodated in the lower box body, and a sealing cover provided on the upper cover of the lower box body.

[0054] With the increasing demand of electric vehicles for lightweight and energy density, more and more lightweight materials such as composite materials are applied in the manufacture of lower box body. However, the composite material cannot use the traditional welding process, so that when the lower box body is connected with other components, the reliability of the connection cannot be guaranteed.

[0055] Based on the above consideration, in order to solve the problem that the connection reliability cannot be guaranteed when the lower box body is connected with other components, a battery device is designed, which comprises a box body, the box body comprising a first part and a second part, the first part and the second part being buckled to form an accommodation space; the second part comprises a first non-metal layer, a second non-metal layer, a metal layer and a mounting portion, the first non-metal layer comprises a bottom plate and a side plate arranged around the bottom plate, part of the metal layer is arranged between the bottom plate and the second non-metal layer, the bottom plate is located on the side of the metal layer away from the accommodation space, and the second non-metal layer is located on the side of the metal layer facing the accommodation space; the mounting portion is located on the side of the side plate away from the accommodation space, and the mounting portion is connected with the metal layer.

[0056] The first non-metal layer can protect the internal metal layer from corrosion and resist external scratches, the middle metal layer ensures the structural rigidity of the entire second part, and the second non-metal layer can ensure the insulation performance inside the second part, while meeting the electrical safety between the second part and the battery cells located inside the second part. When the second part is connected to other components, the other components can be connected together with the corresponding metal layer, so that the reliability of the connection can be improved under the support of the metal layer. At the same time, since the second part adopts the combined structure of the non-metal layer and the metal layer, the weight of the overall box body is effectively reduced. Moreover, it is convenient to provide a mounting portion on the second part, and the mounting portion is connected with the metal layer, so that the load on the mounting portion can be dispersed, and local stress concentration can be avoided to damage the second part.

[0057] The battery in the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery pack and the like. The battery can be used as a power supply or a power supply system of an electric device, so as to improve the overall performance of the battery and facilitate the promotion of the battery.

[0058] The electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric aircraft toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0059] The following embodiments are described with reference to a vehicle 1000 as an example of an electric device of an embodiment of the present application for convenience of description.

[0060] Please refer to Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0061] In some embodiments of the present application, the battery 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0062] Please refer to Figure 2 , Figure 2 An exploded view of the battery 100 provided in some embodiments of the present application is shown. The battery 100 includes a box body 110 and battery cells 120, and the battery cells 120 are accommodated in the box body 110. The box body 110 is used to provide an accommodation space for the battery cells 120, and the box body 110 can adopt various structures. In some embodiments, the box body 110 can include a first part 111 and a second part 112, and the first part 111 and the second part 112 are overlapped with each other, and the first part 111 and the second part 112 together define an accommodation space for accommodating the battery cells 120. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-shaped structure, and the first part 111 is overlapped with the open side of the second part 112 to make the first part 111 and the second part 112 together define the accommodation space; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 is overlapped with the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can have various shapes, such as a cylinder, a cuboid, etc.

[0063] In the battery 100, the battery cells 120 can be multiple, and the multiple battery cells 120 can be connected in series, in parallel, or in a mixed connection, where the mixed connection means that the multiple battery cells 120 are connected in series and in parallel. The multiple battery cells 120 can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the multiple battery cells 120 is accommodated in the box body 110; of course, the battery 100 can also be that the multiple battery cells 120 are first connected in series, in parallel, or in a mixed connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the box body 110. The battery 100 can also include other structures, for example, the battery 100 can also include a busbar component for realizing the electrical connection between the multiple battery cells 120.

[0064] Each battery cell 120 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 thereto. The battery cell 120 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0065] As Figure 3As shown, the battery cell 120 can include a housing, an electrode assembly 123, and electrode terminals. The housing includes a casing 121 having an opening and an end cap 122 closing the opening to isolate an internal environment of the battery cell 120 from an external environment.

[0066] The casing 121 is a component for cooperating with the end cap 122 to form the internal environment of the battery cell 120, where the formed internal environment can be used to accommodate the electrode assembly 123, electrolyte, and other components. The casing 121 and the end cap 122 can be independent components. The casing 121 can be in various shapes and sizes. Specifically, the shape of the casing 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the casing 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0067] The end cap 122 refers to a component that covers the opening of the casing 121 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the casing 121 to cooperate with the casing 121. Optionally, the end cap 122 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cap 122 is not easily deformed when subjected to extrusion and collision, so that the battery cell 120 can have higher structural strength, and the reliability can also be improved. The end cap 122 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly 123 for outputting or inputting the electrical energy of the battery cell 120. The material of the end cap 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 122, which can be used to isolate the electrical connection components in the casing 121 from the end cap 122 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0068] The electrode assembly 123 is a component in which electrochemical reactions occur in the battery cell 120. One or more electrode assemblies 123 can be contained within the case 121. The electrode assembly 123 is mainly formed by winding or layering a positive electrode tab and a negative electrode tab, and a separator film is usually provided between the positive electrode tab and the negative electrode tab to separate the positive electrode tab and the negative electrode tab to avoid internal short circuit. The positive electrode tab and the negative electrode tab have portions with active materials that constitute the main body of the electrode assembly 123, and portions without active materials that constitute the tabs of the positive electrode tab and the negative electrode tab, respectively. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at two ends of the main body, respectively. During the charging and discharging of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop. In addition, the electrode assembly 123 can be a winding type structure or a stacking type structure.

[0069] In some embodiments, the battery cell 120 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0070] According to some embodiments of the present application, Figure 4 For the structural schematic diagram of the battery device in the present application, Figure 5 For Figure 4 the exploded view. As Figure 4 and in combination with Figure 5 shown, the present application provides a battery device, which comprises a box body 110, the box body 110 comprising a first part 111 and a second part 112, the first part 111 and the second part 112 being buckled to form a containing space; the second part 112 comprising a first non-metal layer 1121, a second non-metal layer 1122, a metal layer 1123 and a mounting part 1125, the first non-metal layer 1121 comprising a bottom plate 11211 and a side plate 11212 arranged at the periphery of the bottom plate 11211, part of the metal layer 1123 being arranged between the bottom plate 11211 and the second non-metal layer 1122; the bottom plate 11211 being located on the side of the metal layer 1123 away from the containing space, the second non-metal layer 1122 being located on the side of the metal layer 1123 facing the containing space; the mounting part 1125 being located on the side of the side plate 11212 away from the containing space, and the mounting part 1125 being connected with the metal layer 1123.

[0071] The specific structure of the first part 111 in the present embodiment can be referred to the description above, which will not be repeated here.

[0072] The first non-metallic layer 1121 and the second non-metallic layer 1122 in the embodiment can be formed by mixing fibers and resin, wherein the fibers can be glass fibers, carbon fibers, basalt fibers or combinations thereof, and the resin can be epoxy resin, polyurethane or unsaturated polyester; and the metal layer 1123 is steel or aluminum. The embodiment does not limit the materials of the non-metallic layer and the metal layer, and the specific materials can be determined according to actual conditions.

[0073] As shown in Figure 5 The mounting part 1125 in the embodiment is installed on the side plate 11212 on the front side along the X-axis direction, and it can be understood that the mounting part 1125 can also be installed on the side plate 11212 on the rear side along the X-axis direction, which is not limited here.

[0074] In the embodiment, the bottom plate 11211 and the side plate 11212 are integrally formed, and the bottom plate 11211 and the side plate 11212 are surrounded to form a concave structure, and the metal layer 1123 and the second non-metallic layer 1122 are located in the corresponding concave structures.

[0075] The mounting part 1125 in the embodiment can be connected to the side plate 11212 away from the accommodation space by bolts, and at the same time, the mounting part 1125 is also connected to the metal layer 1123 by bolts, which can be determined according to actual conditions, and the embodiment of the specification does not limit this. In this way, not only is it convenient to provide the mounting part 1125 on the second part 112, but also the mounting part 1125 is not only connected to the side plate 11212, but also connected to the metal layer 1123, so that the load on the mounting part 1125 can be dispersed, avoiding local stress concentration to cause damage to the second part 112.

[0076] Referring to Figure 5 The first non-metallic layer 1121, the metal layer 1123 and the second non-metallic layer 1122 are stacked from bottom to top, and the three can be connected together by bolts, or the three are connected together by adhesion, which is not limited here. At the same time, the first non-metallic layer 1121 is located on the side of the metal layer 1123 away from the accommodation space, and the second non-metallic layer 1122 is located on the side of the metal layer 1123 facing the accommodation space.

[0077] In use, the first non-metal layer 1121 can protect the internal metal layer 1123 from corrosion, and can resist external scratches, the intermediate metal layer 1123 can ensure the structural rigidity of the entire second part 112, and the second non-metal layer 1122 can ensure the insulation performance inside the second part 112, while meeting the electrical safety between the second part 112 and the battery cell located in the second part 112. When the second part 112 is connected with other components, the other components can be connected with the corresponding metal layer 1123, so that the connection reliability can be improved under the support of the metal layer 1123. At the same time, since the second part 112 adopts the combined structure of the non-metal layer and the metal layer, the weight of the entire box body 110 is effectively reduced. Therefore, the mounting part 1125 is connected with the metal layer 1123, so that the load on the mounting part 1125 can be dispersed, and damage to the second part 112 caused by local stress concentration can be avoided.

[0078] According to some embodiments of the present application, as Figure 5 and in combination with Figure 6 It is shown that the metal layer 1123 includes a bending part 11231, which abuts against the side of the side plate 11212 facing the accommodation space.

[0079] The bending part 11231 in the embodiment is integrally formed with the metal layer 1123, and the bending part 11231 is also a metal material.

[0080] The mounting part 1125 in the embodiment can be connected to the side of the side plate 11212 away from the accommodation space by bolts, and at the same time, the mounting part 1125 is also connected with the metal layer 1123 by bolts. The specific connection mode can be determined according to actual conditions, which is not limited in the embodiments of the present application.

[0081] In this way, not only is it convenient to provide the mounting part 1125 on the second part 112, but also the mounting part 1125 is not only connected to the side plate 11212, but also connected to the metal layer 1123, so that the load on the mounting part 1125 can be dispersed, and damage to the second part 112 caused by local stress concentration can be avoided.

[0082] According to some embodiments of the present application, the battery device further includes a reinforcing plate (not labeled in the figure), which is fixed to the side of the side plate 11212 facing the accommodation space, and the bending part 11231 abuts against the side of the reinforcing plate facing the accommodation space; the mounting part 1125 is connected to the side plate 11212, the reinforcing plate and the bending part 11231 in sequence.

[0083] The reinforcing plate in the embodiment can be a steel plate, an alloy plate, etc. The specific reinforcing plate can be determined according to actual conditions, which is not limited in the embodiments of the present application.

[0084] The reinforcing plate in the embodiment can be fixed on the side plate along the X direction through bolts or clamping.

[0085] When the mounting portion 1125 needs to be connected, bolts can be used to sequentially pass through the mounting portion 1125, the side plate 11212, the reinforcing plate, and then be connected with the bending portion 11231.

[0086] In this way, the connection strength between the mounting portion 1125, the side plate 11212, and the bending portion 11231 can be further improved, so that the mounting portion 1125 can be stably connected to the metal layer 1123.

[0087] According to some embodiments of the present application, as shown in Figure 6 and in combination with Figure 5 , the mounting portion 1125 includes a connected bearing portion 11251 and a fixing plate 11252, the bearing portion 11251 is used to connect the battery device with other components, the fixing plate 11252 is connected to the side of the side plate 11212 away from the accommodation space, and the fixing plate 11252 is connected with the bending portion 11231.

[0088] The bearing portion 11251 and the fixing plate 11252 in the embodiment are integrally formed, and the bearing portion 11251 is provided with a mounting hole 11253, so that other components can be inserted into the corresponding mounting hole 11253.

[0089] When the mounting portion 1125 needs to be connected, bolts can be used to sequentially pass through the corresponding fixing plate 11252, the side plate 11212, and then be connected with the bending portion 11231. Since the bending portion 11231 itself has high strength, the connection strength between the mounting portion 1125 and the metal layer 1123 can be improved through the bending portion 11231, so that the mounting portion 1125 can be stably connected to the metal layer 1123.

[0090] According to some embodiments of the present application, as shown in Figure 7 and in combination with Figure 5 , Figure 6 , the second part 112 further includes a fastener 1127 and an adhesive layer 1128; the adhesive layer 1128 is arranged between the side of the side plate 11212 away from the accommodation space and the mounting portion 1125; and the fixing plate 11252 is connected with the side plate 11212 and the bending portion 11231 through the fastener 1127.

[0091] The fastener 1127 in this embodiment can be a bolt, a pull rivet nut, etc., and the bonding layer 1128 can be a glue layer. During installation, the bonding layer 1128 is arranged on the mounting portion 1125 and the side plate 11212 away from the containing space. In this way, the sealing between the mounting portion 1125 and the outer surface of the side plate 11212 can be ensured, and foreign matter can be prevented from entering the second portion 112 through the gap between the mounting portion 1125 and the side plate 11212. In addition, the mounting portion 1125 can be stably connected to the side plate 11212 through the fastener 1127, and the stability of the connection of the mounting portion 1125 is further improved.

[0092] According to some embodiments of the present application, as shown in Figure 5 The second portion 112 further includes a metal edge beam 1124 arranged on the side of the side plate 11212 away from the containing space. Meanwhile, the metal edge beam 1124 is provided with a hanging hole 11241 configured to connect other components.

[0093] The metal edge beam 1124 in this embodiment is arranged on the side plate 11212 along the Y-axis direction. The angle between the Y-axis and the X-axis can be 80°, 85°, 90°, etc. For convenience of description, the X-axis and the Y-axis are perpendicular to each other.

[0094] The metal edge beam 1124 in this embodiment can be a steel body, an aluminum alloy, etc., which is not limited here.

[0095] Referring to Figure 5 As shown in the drawings, the metal edge beam 1124 is arranged on both sides of the second portion 112 and can be connected to the corresponding side plate 11212 through a pull rivet nut. In this way, when the metal edge beams 1124 on both sides are connected to other components through the hanging holes 11241, the load received by the metal edge beams 1124 can be dispersed to the second portion 112, avoiding local stress concentration.

[0096] According to some embodiments of the present application, as shown in Figure 5 The side of the metal edge beam 1124 facing the bottom plate 11211 is provided with an extension plate 11242.

[0097] The metal edge beam 1124 is arranged on the side of the side plate 11212 away from the containing space, and the extension plate 11242 is connected to the side of the bottom plate 11211 away from the metal layer 1123.

[0098] The extension plate 11242 in the embodiment is integrally formed with the metal edge beam 1124, and when the metal edge beam 1124 is connected to the outer surface of the side plate 11212 along the Y-axis direction, the extension plate 11242 is located on the side of the bottom plate 11211 away from the metal layer 1123, and at the same time, the extension plate 11242 is in close contact with the side of the bottom plate 11211 away from the metal layer 1123. In this way, not only can the metal edge beam 1124 be stably connected to the side plate 11212, but also the side of the bottom plate 11211 away from the metal layer 1123 can be protected from being scratched under the protection of the extension plate 11242.

[0099] According to some embodiments of the present application, as shown in Figure 5 The side plate 11212 is provided with a first flange surface 112121 away from the bottom plate 11211, and the metal edge beam 1124 is provided with a second flange surface 11243, both the first flange surface 112121 and the second flange surface 11243 extend outward relative to the accommodation space; when the metal edge beam 1124 is arranged on the side of the side plate 11212 away from the accommodation space, the first flange surface 112121 is connected with the second flange surface 11243.

[0100] The first flange surface 112121 in the embodiment is integrally formed with the side plate 11212, and the second flange surface 11243 is integrally formed with the metal edge beam 1124.

[0101] When the metal edge beam 1124 is connected to the side of the side plate 11212 away from the accommodation space, the first flange surface 112121 and the second flange surface 11243 can be connected together by bolts, thereby facilitating the fixation of the metal edge beam 1124 and the side plate 11212 together.

[0102] According to some embodiments of the present application, as shown in Figure 5 At least one of the bottom plate 11211, the second non-metal layer 1122 and the metal layer 1123 is formed with alternating and continuous arrangement of protrusions and grooves along the first direction.

[0103] The first direction in the embodiment is the Y-axis direction as shown in Figure 5 .

[0104] The bottom plate 11211, the second non-metal layer 1122 and the metal layer 1123 in the embodiment are formed with alternating and continuous arrangement of protrusions and grooves along the Y-axis direction, so as to improve the strength of the bottom plate 11211, the second non-metal layer 1122 and the metal layer 1123, and further improve the strength of the overall box body 110.

[0105] According to some embodiments of the present application, as shown in Figure 5As shown, the second portion 112 further includes a buffer layer 1126, which is arranged between the second non-metal layer 1122 and the metal layer 1123.

[0106] The buffer layer 1126 in the embodiment can be a foam layer, a fiber material layer, etc., which can be determined according to actual conditions, and the embodiments of the present specification do not limit this.

[0107] In this way, when the battery cell is placed on the second non-metal layer 1122, the second non-metal layer 1122 is prevented from directly colliding and rubbing against the metal layer 1123 under the buffering effect of the buffer layer 1126.

[0108] According to some embodiments of the present application, as shown in Figure 5 As shown, the buffer layer 1126 is formed with protrusions and grooves arranged alternately and continuously along the first direction.

[0109] The first direction in the embodiment can refer to the description above, which will not be repeated here.

[0110] Since the buffer layer 1126 is formed with protrusions and grooves arranged alternately and continuously along the Y-axis direction, the strength of the buffer layer 1126 can be improved.

[0111] The present application also provides a power device, which includes the battery device according to any one of the embodiments of the present application.

[0112] The specific structure of the battery device in the embodiment refers to the above-described embodiments. Since all the technical solutions of the above-described embodiments are adopted in the power device, at least all the beneficial effects brought by the technical solutions of the above-described embodiments are possessed, which will not be repeated here.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, which should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a first part and a second part, the first part and the second part being buckled to form a containing space; the second part comprises a first non-metallic layer, a second non-metallic layer, a metal layer and a mounting portion, the first non-metallic layer comprises a bottom plate and a side plate arranged at the periphery of the bottom plate, part of the metal layer is arranged between the bottom plate and the second non-metallic layer, the bottom plate is located on the side of the metal layer away from the containing space, and the second non-metallic layer is located on the side of the metal layer facing the containing space; the mounting portion is located on the side of the side plate away from the containing space, and the mounting portion is connected with the metal layer.

2. The battery device according to claim 1, characterized by The metal layer comprises a bending portion, and the bending portion abuts against the side of the side plate facing the containing space.

3. The battery device of claim 2, wherein, The battery device further comprises a reinforcing plate fixed to the side of the side plate facing the containing space, and the bending portion abuts against the side of the reinforcing plate facing the containing space; the mounting portion is sequentially connected with the side plate, the reinforcing plate and the bending portion.

4. The battery device according to claim 2 or 3, wherein the mounting portion comprises a connecting bearing portion and a fixing plate connected therewith, the bearing portion is used for connecting the battery device with other components, the fixing plate is connected to the side of the side plate away from the containing space, and the fixing plate is connected with the bending portion.

5. The battery device of claim 4, wherein, The second part further comprises a fastener and an adhesive layer; the adhesive layer is arranged between the side of the side plate away from the containing space and the mounting portion; the fixing plate is connected with the side plate and the bending portion through the fastener.

6. The battery device of claim 2, wherein The second part further comprises a metal edge beam arranged on the side of the side plate away from the containing space; the metal edge beam is provided with a hanging hole configured to connect other components.

7. The battery device of claim 6, wherein The metal edge beam is provided with an extension plate on the side facing the bottom plate, and the extension plate is connected to the side of the bottom plate away from the metal layer.

8. The battery device of claim 6, wherein, The side plate is provided with a first flange surface on the side away from the bottom plate, and the metal edge beam is provided with a second flange surface, both the first flange surface and the second flange surface extending outward relative to the containing space; when the metal edge beam is arranged on the side of the side plate away from the containing space, the first flange surface is connected with the second flange surface.

9. The battery device of claim 2, wherein, At least one of the bottom plate, the second non-metallic layer and the metal layer is formed with protrusions and grooves arranged alternately and continuously in a first direction.

10. The battery device of claim 1, wherein The second part further comprises a buffer layer arranged between the second non-metallic layer and the metal layer.

11. The battery device of claim 10, wherein, The buffer layer is formed with protrusions and grooves arranged alternately and continuously in a first direction.

12. An electrical device, characterized by The battery device comprises the battery device according to any one of claims 1 to 11.

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