Battery device, electric equipment and box cover

Abstract

The utility model relates to a battery device, electric equipment and a box cover, a cover body is provided with a reinforcing area and a peripheral area, and the thickness of the reinforcing area is greater than that of the peripheral area, so that a seat is thickened at a fixed position on the box cover, and the bearing capacity of the seat is enhanced. And meanwhile, the reinforcing component is filled in the mounting component, so that the mounting component and the reinforcing component which are of the hollow structure can form an embedded structure with relatively high rigidity. According to the design, the structural design of the box cover is improved, the structural strength of the box cover for fixing the seat is improved, and the seat is reliably fixed, so that the metal structural design on the box cover can be partially or completely canceled, the overall weight is reduced, and the light weight of the battery device is facilitated.

Description

Technical Field

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

[0002] As new energy vehicles pursue longer driving range, battery devices are generally integrated with the chassis of the vehicle to increase the space for battery device layout and improve the energy density of the battery device. For example, the seat is directly fixed to the box cover of the battery device through the seat beam. In order to achieve the fixed installation of the seat, the box cover of the traditional battery device is usually made of metal material to enhance the structural strength. However, this structural design will increase the overall weight of the box cover, which is not conducive to the lightweight of the battery device. Utility Model Content

[0003] Based on this, it is necessary to provide a battery device, electrical equipment and box cover, which can reduce the overall weight while achieving reliable fixed installation of the seat, thereby facilitating the lightweighting of the battery device.

[0004] In the first aspect, the present application provides a battery device, which includes: a battery cell, a bottom shell and a box cover. The box cover is arranged on the bottom shell, and the battery cell is accommodated between the bottom shell and the box cover, wherein the box cover includes: a cover body, including a reinforcement area and a peripheral area outside the reinforcement area, the structural strength of the reinforcement area is greater than the structural strength of the peripheral area; a mounting component, which is arranged on the reinforcement area, and has a cavity inside the mounting component, and the side of the mounting component facing away from the cavity is used to fix the seat; a reinforcing component, which is arranged in the cavity.

[0005] The above-mentioned box cover has a peripheral area and a reinforcement area respectively arranged on the cover body, and the structural strength of the reinforcement area is greater than that of the peripheral area, so that the seat is reinforced at the fixed position on the box cover, thereby improving its load-bearing capacity. At the same time, a reinforcement component is filled inside the mounting component, so that the mounting component with a hollow structure and the reinforcement component can form a high-rigidity interlocking structure. With such a design, by improving the structural design of the box cover, the structural strength of the box cover for fixing the seat is improved, so that the seat can be reliably fixed, so that the metal structure design on the box cover can be partially or completely eliminated, reducing the overall weight, which is conducive to lightweighting of the battery device.

[0006] In some embodiments, the thickness of the reinforcement area is greater than that of the peripheral area. With such a design, the position of the cover body used for fixing the seat is thickened, thereby enhancing the structural strength and improving the reliability of the seat fixing.

[0007] In some embodiments, the reinforcement area includes a first surface and a second surface that are opposite to each other along the thickness direction of the peripheral area, the first surface protrudes from one surface of the peripheral area along its own thickness direction, the second surface is flush with or protrudes from another surface of the peripheral area along its own thickness direction, and the mounting component is disposed on the first surface or the second surface. This design allows the reinforcement area to be better embedded in the peripheral area, which is convenient for improving the connection strength between the two and the load-bearing capacity of the box cover, thereby making the seat reliable and stable.

[0008] In some embodiments, the second surface faces the battery cell, the second surface is flush with the surface of the peripheral area along its own thickness direction and facing the battery cell, and the mounting component is arranged on the first surface. In this design, the second surface is flush with the surface of the peripheral area, which can reduce the space occupied by the second surface inside the battery device due to protruding from the surface of the peripheral area.

[0009] In some embodiments, the mounting component includes two side parts and a fixing part connected between the two side parts, the two side parts are arranged in the reinforcement area at intervals along a preset direction, the fixing part, the two side parts and the reinforcement area enclose a cavity, and the side of the fixing part facing away from the cavity is used to fix the seat. The preset direction intersects with the thickness direction of the peripheral area. In this way, the mounting component is designed as a side part and a fixing part, which not only facilitates the fixing part to be stably supported on the reinforcement area; it also facilitates the seat to be stably supported on the mounting component, thereby improving the stability of the structure.

[0010] In some embodiments, the reinforcement area includes two side edges that are opposite to each other along a preset direction, and each side edge extends beyond the corresponding side portion in the preset direction. In this design, each side edge extends beyond the corresponding side portion, and the structure of the mounting component on both sides along the preset direction is thickened, which is conducive to improving the left and right bending resistance of the mounting component in the peripheral area along the preset direction, thereby improving the reliability of the seat fixation.

[0011] In some embodiments, the dimension of the side extending beyond the side portion is recorded as L, wherein 20 mm ≤ L ≤ 50 mm. With such a design, the dimension L is controlled between 20 mm and 50 mm, and the range of the reinforcement area on the peripheral area is reasonably controlled under the premise of ensuring the reliability of the seat fixation, thereby reducing the increase in the overall weight of the box cover.

[0012] In some embodiments, L also satisfies the condition: 30 mm ≤ L ≤ 40 mm. With such a design, the dimension L is further controlled between 30 mm and 40 mm, further effectively taking into account the stability of the seat fixing and the weight of the entire box cover.

[0013] In some embodiments, the thickness of the reinforcement area is recorded as h1, and the thickness of the peripheral area is recorded as h2, wherein 3≤h1 / h2≤5. In this design, the ratio of the thickness h1 to the thickness h2 is controlled between 3 and 5, and the thickness of the reinforcement area is controlled under the premise of effectively supporting the seat, thereby effectively taking into account the reliability of the seat fixation and the weight of the entire box cover.

[0014] In some embodiments, h1 / h2 also satisfies the condition of: 4≤h1 / h2≤5. With such a design, the ratio of the thickness h1 to the thickness h2 is further controlled between 4 and 5, further effectively taking into account the reliability of the seat fixation and the overall weight of the box cover.

[0015] In some embodiments, h1 satisfies the condition: 3 mm ≤ h1 ≤ 5 mm. With such a design, the thickness h1 of the reinforcement area is controlled between 3 mm and 5 mm, so that the size of the reinforcement area meets the requirement of reliable fixing of the seat.

[0016] In some embodiments, the reinforcement area and the mounting components are both multiple, the peripheral area is arranged around the periphery of each reinforcement area, and at least one mounting component is arranged on the reinforcement area. In this design, increasing the number of reinforcement areas and mounting components is conducive to increasing the fixing position of the mounting component and the seat, so as to achieve a secure fixation of the seat.

[0017] In some embodiments, the box cover further includes a fastener, which is disposed on the mounting component and at least partially located in the cavity, and is used to connect with the seat. With such a design, the seat is effectively and stably fixed to the mounting component through the fastener, thereby improving the stability of the structure.

[0018] In some embodiments, the peripheral area, the reinforcement area and the mounting components are all constructed as a structure having a non-metal composite material. In this way, the peripheral area, the reinforcement area and the mounting components are all designed as non-metal composite materials, which reduces the overall weight of the box cover while ensuring reliable fixation of the seat, which is conducive to achieving lightweight battery devices.

[0019] In the second aspect, the present application provides a box cover, which includes: a cover body, including a reinforcement area and a peripheral area located outside the reinforcement area, the structural strength of the reinforcement area is greater than the structural strength of the peripheral area; an installation component, which is arranged on the reinforcement area, and has a cavity inside the installation component; a reinforcement component, which is arranged in the cavity.

[0020] In a third aspect, the present application provides an electrical device, the electrical device comprising: a battery device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0022] Figure 2An exploded view of a battery device provided in accordance with some embodiments of the present application.

[0023] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application.

[0024] Figure 4 This is a structural cross-sectional view of a box cover provided in some embodiments of the present application.

[0025] Figure 5 This is a structural cross-sectional view of a box cover provided in some other embodiments of the present application.

[0026] Figure 6 This is a structural cross-sectional view of a box cover provided in some other embodiments of the present application.

[0027] Figure 7 This is a top view of the structure of the box cover provided in some embodiments of the present application.

[0028] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, housing; 1, housing cover; 2, bottom shell; 20, battery cell; 201, end cap; 202, electrode terminal; 203, housing; 204, electrode assembly; 11, cover body; 111, inner surface; 112, outer surface; 12, reinforcement area; 121, first surface; 122, second surface; 123, side; 13, mounting component; 131, side; 132, fixing portion; 133, cavity; 14, reinforcement component; 15, fastener; 16, peripheral area; X, preset direction; Y, thickness direction. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0035] At present, from the perspective of market development, the application of power battery devices is becoming more and more extensive. Power battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery devices, the market demand is also constantly expanding.

[0036] As new energy vehicles pursue longer driving range, battery devices are generally integrated with the chassis of the vehicle to increase the space for battery device layout and improve the energy density of the battery device. For example, the seat is directly fixed on the box cover of the battery device to reduce the redundant structure in the chassis. In order to achieve the fixed installation of the seat, the box cover of the traditional battery device is usually made of metal material to enhance the structural strength. However, this structural design will increase the overall weight of the box cover, which is not conducive to the lightweight of the battery device.

[0037] Based on this, in order to solve the problem that the overall weight of the box cover increases in order to achieve reliable fixation of the seat, the present application provides a battery device, in which the cover body is configured as a reinforcement area and a peripheral area, and the structural strength of the reinforcement area is greater than the structural strength of the peripheral area, so that the seat is reinforced at the fixed position on the box cover, thereby improving its load-bearing capacity. At the same time, a reinforcement component is filled inside the mounting component, so that the mounting component of the hollow structure and the reinforcement component can form a high-rigidity interlocking structure. With such a design, by improving the structural design of the box cover, the structural strength of the box cover for fixing the seat is improved, so that the seat can be reliably fixed, so that the metal structure design on the box cover can be partially or completely eliminated, reducing the overall weight, which is conducive to lightweight battery devices.

[0038] The battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electrical devices such as vehicles, ships or aircraft. A power supply system comprising the battery cells and battery devices disclosed in the present application can be used to form the electrical device.

[0039] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0040] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0041] Please refer to Figure 2 , Figure 2 The exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. Among them, the box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a box cover 1 and a bottom shell 2, and the box cover 1 and the bottom shell 2 cover each other, and the box cover 1 and the bottom shell 2 jointly define a storage space for accommodating the battery cell 20. The bottom shell 2 can be a hollow structure with one end open, and the box cover 1 can be a plate-like structure. The box cover 1 covers the open side of the bottom shell 2, so that the box cover 1 and the bottom shell 2 jointly define a storage space; the box cover 1 and the bottom shell 2 can also be hollow structures with one side open, and the open side of the box cover 1 covers the open side of the bottom shell 2. Of course, the box body 10 formed by the box cover 1 and the bottom shell 2 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0042] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0043] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0044] Please refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery device 100. Figure 3 The battery cell 20 includes an end cover 201, a shell 203, an electrode assembly 204 and other functional components.

[0045] The end cap 201 refers to a component that covers the opening of the shell 203 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 201 can be adapted to the shape of the shell 203 to match the shell 203. Optionally, the end cap 201 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 201 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 202 can be provided on the end cap 201. The electrode terminal 202 can be used to electrically connect with the electrode assembly 204 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 201 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 201 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 201, and the insulating member may be used to isolate the electrical connection components in the housing 203 from the end cap 201 to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber, etc. It should be noted that, Figure 2 The box cover 1 shown in the figure is only used to show the structure of the box body 10, and the detailed structure thereof is not shown in the figure. Figure 2 Displayed in.

[0046] The shell 203 is a component used to cooperate with the end cap 201 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 204, the electrolyte and other components. The shell 203 and the end cap 201 can be independent components, and an opening can be set on the shell 203, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 201 at the opening. Without limitation, the end cap 201 and the shell 203 can also be integrated. Specifically, the end cap 201 and the shell 203 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 203, the end cap 201 covers the shell 203. The shell 203 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 203 can be determined according to the specific shape and size of the electrode assembly 204. The shell 203 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special limitation on this.

[0047] The electrode assembly 204 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 204 may be included in the housing 203. The electrode assembly 204 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 204, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals 202 to form a current loop.

[0048] According to some embodiments of this application, please refer to Figure 4 The present application provides a battery device 100, which includes: a battery cell 20, a bottom shell 2 and a box cover 1, wherein the box cover 1 is disposed on the bottom shell 2, and the battery cell 20 is accommodated between the bottom shell 2 and the box cover 1. The box cover 1 includes: a cover body 11, a mounting component 13 and a reinforcing component 14. The cover body 11 includes a reinforcing area 12 and a peripheral area 16 located outside the reinforcing area 12, and the structural strength of the reinforcing area 12 is greater than the structural strength of the peripheral area 16. The mounting component 13 is disposed on the reinforcing area 12, and a cavity 133 is provided in the mounting component 13. The side of the mounting component 13 facing away from the cavity 133 is used to fix the seat, and the reinforcing component 14 is disposed in the cavity 133.

[0049] The cover body 11 refers to the main structure on the box cover 1, which cooperates with the bottom shell 2 to enclose a storage space for accommodating the battery cell 20. The reinforcement area 12 refers to the structure on the box cover 1 for fixing the seat, and the peripheral area 16 is located at the periphery of the reinforcement area 12. At this time, the reinforcement area 12 is equivalent to being embedded in the cover body 11. The structural strength of the reinforcement area 12 is greater than the structural strength of the peripheral area 16. There are many ways to achieve this, such as: the material elastic modulus of the reinforcement area 12 is greater than the material elastic modulus of the peripheral area 16, that is, the reinforcement area 12 and the peripheral area 16 are made of different materials; or, the thickness of the reinforcement area 12 is greater than the thickness of the peripheral area 16. Of course, the material elastic modulus and thickness of the reinforcement area 12 can also be greater than the material elastic modulus and thickness of the peripheral area 16. Meanwhile, when the materials of the reinforcing area 12 and the peripheral area 16 can be consistent, both the reinforcing area 12 and the peripheral area 16 can be structures having a composite material, wherein the composite material can be, but is not limited to, a continuous fiber reinforced type resin, and the resin can be a thermosetting resin, such as epoxy resin, polyurethane; or a thermoplastic resin, such as polyamide resin, polypropylene resin, etc. In some examples, the reinforcing area 12 and the peripheral area 16 are an integrated structure, and the thickness of the reinforcing area 12 is greater than the thickness of the peripheral area 16, that is, a portion of the cover body 11 is raised along at least one side of its own thickness direction Y to form the reinforcing area 12.

[0050] The mounting component 13 refers to a structure for fixing the seat, and has a cavity 133 inside, which can reduce the weight of the mounting component 13 itself. The internal cavity 133 can be formed only by the structure of the mounting component 13 itself, for example, the mounting component 13 can be a square tubular structure; of course, it can also be formed by the mounting component 13 and the reinforcement area 12. At the same time, the cavity 133 in the mounting component 13 can be filled with the reinforcement component 14 to form a chimeric structure. Among them, there are many options for the material of the reinforcement component 14, for example, the reinforcement component 14 can be selected from foam materials, such as MPPE (Modified Polypheylene ether), RPU (Rigid Polyurethane) and other foam materials; of course, materials with greater structural rigidity can also be selected, such as pultruded composite materials, aluminum blocks, etc.

[0051] In addition, the seat can be directly fixed on the mounting component 13, or indirectly fixed on the mounting component 13 through the seat beam, wherein the seat or the seat beam can be fixed on the mounting component 13 in various ways, such as: the fixing method can be but not limited to clamping, bolting, pinning, riveting, etc. At the same time, the mounting component 13 can be fixed on the reinforcement area 12 in various ways, such as: can be but not limited to clamping, bolting, pinning, integrated molding, etc. Among them, the integrated molding method can be extrusion, injection molding, etc.

[0052] With such a design, by improving the structural design of the box cover 1, the structural strength of the box cover 1 for fixing the seat is increased, so that the seat can be reliably fixed, so that the metal structure design on the box cover 1 can be partially or completely eliminated, reducing the overall weight, which is conducive to lightweighting of the battery device 100.

[0053] According to some embodiments of the present application, optionally, the thickness of the reinforcement area 12 is greater than the thickness of the peripheral area 16 .

[0054] Under the premise that the thickness of the reinforcement area 12 is greater than the thickness of the peripheral area 16, the materials of the reinforcement area 12 and the peripheral area 16 can be consistent or different. When the materials selected for the two are different, the elastic modulus of the material of the reinforcement area 12 can be greater than the elastic modulus of the material of the peripheral area 16.

[0055] Such a design makes the cover body 11 thicker at the position for fixing the seat, thereby enhancing the structural strength and improving the reliability of the seat fixing.

[0056] According to some embodiments of the present application, optionally, please refer to Figures 4 to 6 The reinforcement area 12 includes a first surface 121 and a second surface 122 that are opposite to each other along the thickness direction Y of the peripheral area 16. The first surface 121 protrudes from one surface of the peripheral area 16 along its own thickness direction Y, and the second surface 122 is flush with or protrudes from the other surface of the peripheral area 16 along its own thickness direction Y. The mounting component 13 is arranged on the first surface 121 or the second surface 122.

[0057] The cover body 11 cooperates with the bottom shell 2 to form a storage space for accommodating the battery cell 20. Therefore, the two surfaces of the peripheral area 16 along its thickness direction Y may include an inner surface 111 facing the storage space and an outer surface 112 facing away from the storage space. The first surface 121 may protrude from the outer surface 112 of the peripheral area 16, and the second surface 122 may be flush with or protrude from the inner surface 111 of the peripheral area 16. For details, please refer to Figure 4 and Figure 7 , in this case, the mounting member 13 can be disposed on the first surface 121. Of course, the first surface 121 can protrude from the inner surface 111 of the peripheral area 16, and the second surface 122 can be flush with or protrude from the outer surface 112 of the peripheral area 16. For details, please refer to Figure 6 , at this time, the mounting component 13 is disposed on the second surface 122 .

[0058] Such a design allows the reinforcement area 12 to be better embedded in the peripheral area 16, thereby improving the connection strength between the two and increasing the bearing capacity of the box cover 1, thereby making the seat fixed reliably and stably.

[0059] According to some embodiments of the present application, optionally, please refer to Figure 4The second surface 122 faces the battery cell 20 , and the second surface 122 is flush with the surface of the peripheral area 16 along its own thickness direction Y and faces the battery cell 20 . The mounting component 13 is disposed on the first surface 121 .

[0060] The mounting member 13 is disposed on the first surface 121, which means that the first surface 121 protrudes from the outer surface 112 of the peripheral region 16, and the second surface 122 is flush with the inner surface 111 of the peripheral region 16. In this embodiment, the second surface 122 is flush with the inner surface 111 of the peripheral region 16, so as to reduce the space occupied by the second surface 122 inside the battery device 100 due to the protrusion of the surface of the peripheral region 16.

[0061] With such a design, the second surface 122 is flush with the surface of the peripheral region 16 , which can reduce the space inside the battery device 100 occupied by the second surface 122 protruding from the surface of the peripheral region 16 .

[0062] According to some embodiments of the present application, optionally, please refer to Figure 4 The mounting component 13 includes two side portions 131 and a fixing portion 132 connected between the two side portions 131. The two side portions 131 are arranged in the reinforcement area 12 at intervals along a preset direction X. The fixing portion 132, the two side portions 131 and the reinforcement area 12 enclose a cavity 133. The side of the fixing portion 132 facing away from the cavity 133 is used to fix the seat. The preset direction X intersects with the thickness direction Y of the peripheral area 16.

[0063] The fixing portion 132 refers to a structure on the mounting component 13 for fixing the seat, and is spaced apart from the reinforcement area 12 along the thickness direction Y of the peripheral area 16. There are many ways to fix the seat on the fixing portion 132, for example, the seat can be fixed to the fixing portion 132 by bolts, rivets, pins and other components; of course, the seat can also be fixed to the fixing portion 132 by structural adhesives, welding rods and other materials. In some examples, the preset direction X is perpendicular to the thickness direction Y of the peripheral area 16.

[0064] The fixing portion 132 is connected between the two side portions 131 and supported on the reinforcement area 12 through the two side portions 131, providing stable support for the seat. At the same time, the reinforcing component 14 filled in the cavity 133 can also support the fixing portion 132 to improve the bearing capacity of the fixing portion 132 on the seat. There are also many ways to connect the fixing portion 132 and the side portions 131, such as bolt connection, welding, riveting, pin connection, integrated molding, etc. In some examples, the reinforcement area 12, the two side portions 131 and the fixing portion 132 are an integrated structure.

[0065] In addition, in some embodiments, the reinforcement area 12 and the mounting component 13 can extend on the peripheral area 16 along a direction intersecting with the preset direction X; at the same time, the cavity 133 also extends along a direction intersecting with the preset direction X, which can extend the fixed position of the seat and facilitate further improving its fixation reliability.

[0066] In this way, the mounting component 13 is designed as a side portion 131 and a fixing portion 132, which not only facilitates the fixing portion 132 to be stably supported on the reinforcement area 12, but also facilitates the seat to be stably supported on the mounting component 13, thereby improving the stability of the structure.

[0067] According to some embodiments of the present application, optionally, please refer to Figure 4 The reinforcement area 12 includes two side edges 123 opposite to each other along the preset direction X, and each side edge 123 extends beyond the corresponding side portion 131 in the preset direction X.

[0068] Each side edge 123 extends beyond the corresponding side portion 131, indicating that the mounting member 13 is located in the middle of the reinforcement area 12. Figure 4 For example, Figure 4 The side edge 123 on the left side of the center is protruding Figure 4 Outside the side portion 131 on the left side, Figure 4 The side edge 123 on the middle right side is protruding Figure 4 In this embodiment, each side edge 123 extends beyond the corresponding side portion 131, and the structure of both sides of the mounting component 13 along the preset direction X can be respectively thickened, which can improve the left and right bending resistance of the mounting component 13 in the peripheral area 16 along the preset direction X.

[0069] The dimension of each side edge 123 extending beyond the corresponding side portion 131 may be greater than or equal to the height of the side portion 131 on the reinforcement area 12; of course, it may also be less than the height of the side portion 131 on the reinforcement area 12. When the dimension of each side edge 123 extending beyond the corresponding side portion 131 is greater than the height of the side portion 131 on the reinforcement area 12, not only the range of the reinforcement area 12 on the peripheral area 16 is increased, but also the bending resistance of the mounting component 13 along the preset direction X on the peripheral area 16 is further improved.

[0070] With such a design, each side edge 123 extends beyond the corresponding side portion 131 and the structure on both sides of the mounting component 13 along the preset direction X is thickened, which is beneficial to improving the left and right bending resistance of the mounting component 13 in the peripheral area 16 along the preset direction X, thereby improving the reliability of seat fixation.

[0071] According to some embodiments of the present application, optionally, please refer to Figure 4 The dimension of the side edge 123 extending beyond the side portion 131 is denoted as L, wherein 20 mm ≤ L ≤ 50 mm.

[0072] The side edge 123 is too large beyond the side portion 131, which may increase the size of the reinforcement area 12 and increase the overall weight of the box cover 1. Therefore, under the premise of ensuring the reliability of seat fixation, the size L may be between 20 mm and 50 mm, for example, the size L may be, but is not limited to, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, etc.

[0073] With such a design, the dimension L is controlled between 20 mm and 50 mm. On the premise of ensuring the reliability of seat fixation, the range of the reinforcement area 12 on the peripheral area 16 is reasonably controlled to reduce the increase in the overall weight of the box cover 1.

[0074] According to some embodiments of the present application, optionally, L also satisfies the condition: 30 mm ≤ L ≤ 40 mm.

[0075] The size L may further be between 30 mm and 40 mm. For example, the size L may be, but is not limited to, 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 40 mm, etc.

[0076] With such a design, the dimension L is further controlled between 30 mm and 40 mm, further effectively taking into account the stability of the seat fixation and the overall weight of the box cover 1.

[0077] According to some embodiments of the present application, optionally, the thickness of the reinforcement area 12 is recorded as h1, and the thickness of the peripheral area 16 is recorded as h2, wherein 3≤h1 / h2≤5.

[0078] The ratio of the thickness h1 to the thickness h2 may be between 3 and 5, for example, the ratio may be, but is not limited to, 3, 3.2, 3.4, 3.6, 3.8, 4, 4.2, 4.4, 4.6, 4.8, 5, etc.

[0079] With such a design, the ratio of the thickness h1 to the thickness h2 is controlled between 3 and 5. On the premise of effectively supporting the seat, the thickness of the reinforced area 12 is controlled, thereby effectively taking into account the reliability of seat fixation and the overall weight of the box cover 1.

[0080] According to some embodiments of the present application, optionally, h1 / h2 also satisfies the condition: 4≤h1 / h2≤5.

[0081] The ratio of the thickness h1 to the thickness h2 may be between 4 and 5, for example, the ratio may be, but is not limited to, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, etc.

[0082] With such a design, the ratio of the thickness h1 to the thickness h2 is further controlled between 4 and 5, further effectively taking into account the reliability of the seat fixation and the overall weight of the box cover 1.

[0083] According to some embodiments of the present application, optionally, h1 satisfies the condition: 3mm≤h1≤5mm.

[0084] When the ratio of thickness h1 to thickness h2 is 3-5 or 4-5, thickness h1 can be between 3 mm and 5 mm. For example, thickness h1 can be but not limited to 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 3.8 mm, 4 mm, 4.2 mm, 4.4 mm, 4.6 mm, 4.8 mm, 5 mm, etc.

[0085] With such a design, the thickness h1 of the reinforcement area 12 is controlled between 3 mm and 5 mm, so that the size of the reinforcement area 12 meets the requirement of reliable fixation of the seat.

[0086] According to some embodiments of the present application, optionally, please refer to Figure 7 The reinforcement area 12 and the mounting components 13 each include a plurality of peripheral areas 16 disposed around the periphery of each reinforcement area 12 , and at least one mounting component 13 is disposed on the reinforcement area 12 .

[0087] All the reinforcement areas 12 may be arranged in parallel on the cover body 11, and two adjacent reinforcement areas 12 may be connected to each other, such as the reinforcement areas 12 are arranged in parallel on the peripheral area 16 and connected to each other to form an integral structure; in addition, two adjacent reinforcement areas 12 are also separated from each other. In some examples, all the reinforcement areas 12 are arranged in parallel and spaced along a preset direction X on the peripheral area 16, wherein the preset direction X is the spacing direction between the two side portions 131 in the mounting component 13, and of course, it may also be the width direction of the peripheral area 16.

[0088] The number of mounting components 13 can be one or more on the same reinforcement area 12. When the number of mounting components 13 is more than one, all mounting components 13 can be arranged in parallel in sequence, so that the fixing positions of the mounting components 13 and the seat can be further increased on the same reinforcement area 12, so that the seat can be firmly fixed.

[0089] Such a design increases the number of reinforcement areas 12 and mounting components 13, which is beneficial to increasing the fixing positions of the mounting components 13 and the seat, thereby achieving a secure fixation of the seat.

[0090] According to some embodiments of the present application, optionally, please refer to Figure 4 The box cover 1 also includes a fastener 15, which is arranged on the mounting component 13 and at least partially located in the cavity 133. The fastener 15 is used to connect with the seat.

[0091] The fastener 15 refers to a structure for fixing the seat to the mounting component 13, which may be, but is not limited to, a bolt, a pin, a rivet, etc. In some examples, the fastener 15 is a rivet, which is at least partially located in the cavity 133 and is riveted to the mounting component 13. At the same time, the number of fasteners 15 on the same mounting component 13 may be one or more.

[0092] With such a design, the seat is effectively and stably fixed on the mounting component 13 through the fastener 15, thereby improving the stability of the structure.

[0093] According to some embodiments of the present application, optionally, the peripheral area 16 , the reinforcement area 12 , and the mounting component 13 are all constructed to have a structure having a non-metal composite material.

[0094] It should be noted that non-metallic composite materials refer to materials that combine a non-metallic matrix with a reinforcing material, such as a combination of a resin and continuous fibers, wherein the resin may be a thermosetting resin, such as epoxy resin, polyurethane, or a thermoplastic resin, etc. Since non-metallic composite materials are well-known materials, their specific structures are not described in detail here.

[0095] With such a design, the peripheral area 16 , the reinforcement area 12 and the mounting component 13 are all designed to be non-metallic composite materials. Under the premise of ensuring reliable fixation of the seat, the overall weight of the box cover 1 is reduced, which is conducive to achieving lightweight battery device 100 .

[0096] According to some embodiments of this application, please refer to Figures 4 to 6 The present application provides a box cover 1, which includes: a cover body 11, including a reinforcement area 12 and a peripheral area 16 located outside the reinforcement area 12, the structural strength of the reinforcement area 12 is greater than the structural strength of the peripheral area 16; an installation component 13, which is arranged on the reinforcement area 12, and has a cavity 133; a reinforcement component 14, which is arranged in the cavity 133.

[0097] The cover body 11 refers to the main structure on the box cover 1, which cooperates with the bottom shell 2 to enclose a storage space for accommodating the battery cell 20. The reinforcement area 12 refers to the structure on the box cover 1 for fixing the seat, and the peripheral area 16 is located at the periphery of the reinforcement area 12. At this time, the reinforcement area 12 is equivalent to being embedded in the cover body 11. The structural strength of the reinforcement area 12 is greater than the structural strength of the peripheral area 16. There are many ways to achieve this, such as: the material elastic modulus of the reinforcement area 12 is greater than the material elastic modulus of the peripheral area 16, that is, the reinforcement area 12 and the peripheral area 16 are made of different materials; or, the thickness of the reinforcement area 12 is greater than the thickness of the peripheral area 16. Of course, the material elastic modulus and thickness of the reinforcement area 12 can also be greater than the material elastic modulus and thickness of the peripheral area 16. Meanwhile, when the materials of the reinforcing area 12 and the peripheral area 16 can be consistent, both the reinforcing area 12 and the peripheral area 16 can be structures having a composite material, wherein the composite material can be, but is not limited to, a continuous fiber reinforced type resin, and the resin can be a thermosetting resin, such as epoxy resin, polyurethane; or a thermoplastic resin, such as polyamide resin, polypropylene resin, etc. In some examples, the reinforcing area 12 and the peripheral area 16 are an integrated structure, and the thickness of the reinforcing area 12 is greater than the thickness of the peripheral area 16, that is, a portion of the cover body 11 is raised along at least one side of its own thickness direction Y to form the reinforcing area 12.

[0098] The mounting component 13 refers to a structure for fixing the object to be installed, such as fixing a seat. Of course, in other embodiments, the mounting component 13 can also fix other objects. The mounting component 13 has a cavity 133 inside, which can reduce the weight of the mounting component 13 itself. The internal cavity 133 can be formed only by the structure of the mounting component 13 itself, such as: the mounting component 13 can be a square tubular structure; of course, it can also be formed by the mounting component 13 and the reinforcement area 12. At the same time, the cavity 133 in the mounting component 13 can be filled with the reinforcement component 14 to form a chimeric structure. Among them, the material of the reinforcement component 14 can have a variety of options, for example: the reinforcement component 14 can be selected from foam materials, such as MPPE (Modified Polypheylene ether), RPU (Rigid Polyurethane) and other foam materials; of course, materials with greater structural rigidity can also be selected, such as pultruded composite materials, aluminum blocks, etc.

[0099] In addition, it should be noted that the box cover 1 in this embodiment can be the box cover 1 in any of the above embodiments. Therefore, other specific structures of the box cover 1 in this embodiment can refer to the above embodiments and will not be described in detail here.

[0100] With such a design, by improving the structural design of the box cover 1, the structural strength of the box cover 1 for fixing the seat is increased, so that the seat can be reliably fixed, so that the metal structure design on the box cover 1 can be partially or completely eliminated, reducing the overall weight, which is conducive to lightweighting of the battery device 100.

[0101] According to some embodiments of the present application, the present application provides an electrical device, and the electrical device includes: the battery device 100 as described above.

[0102] According to some embodiments of this application, please refer to Figures 4 to 7 The present application provides a box cover 1, which includes a cover body 11, a mounting component 13 and a reinforcing component 14. The cover body 11 includes a reinforcing area 12 and a peripheral area 16, and the peripheral area 16 is arranged around the outer periphery of the reinforcing area 12. The thickness of the reinforcing area 12 is greater than that of the peripheral area 16, providing structural support for the fixation of the seat. The mounting component 13 is arranged on the reinforcing area 12, and a cavity 133 is formed between the mounting component 13 and the reinforcing area 12. The reinforcing component 14 is filled in the cavity 133, such as a foam structure, so that a high-rigidity interlocking structure is formed between the mounting component 13 and the reinforcing component 14.

[0103] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0104] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, It is characterized in that The battery device comprises: Battery cell (20); Bottom shell (2); A box cover (1) is arranged on the bottom shell (2), and the battery cell (20) is accommodated between the bottom shell (2) and the box cover (1), wherein the box cover (1) comprises: A cover body (11) comprises a reinforcement area (12) and a peripheral area (16) located outside the reinforcement area (12), wherein the structural strength of the reinforcement area (12) is greater than the structural strength of the peripheral area (16); A mounting component (13) is disposed on the reinforcement area (12), wherein the mounting component (13) has a cavity (133) therein, and a side of the mounting component (13) facing away from the cavity (133) is used for fixing the seat; The reinforcing component (14) is arranged in the cavity (133).

2. The battery device according to claim 1, It is characterized in that The thickness of the reinforcement area (12) is greater than the thickness of the peripheral area (16).

3. The battery device according to claim 2, It is characterized in that The reinforcement area (12) comprises a first surface (121) and a second surface (122) which are opposite to each other along the thickness direction (Y) of the peripheral area (16); the first surface (121) protrudes from one surface of the peripheral area (16) along its own thickness direction (Y); the second surface (122) is flush with or protrudes from another surface of the peripheral area (16) along its own thickness direction (Y); and the mounting component (13) is arranged on the first surface (121) or the second surface (122).

4. The battery device according to claim 3, It is characterized in that The second surface (122) faces the battery cell (20), the second surface (122) is flush with the surface of the peripheral area (16) along its own thickness direction (Y) and facing the battery cell (20), and the mounting component (13) is arranged on the first surface (121).

5. The battery device according to claim 1, It is characterized in that The mounting component (13) comprises two side portions (131) and a fixing portion (132) connected between the two side portions (131); the two side portions (131) are arranged at intervals in the reinforcement area (12) along a preset direction (X); the fixing portion (132), the two side portions (131) and the reinforcement area (12) enclose the cavity (133); a side of the fixing portion (132) facing away from the cavity (133) is used to fix the seat; the preset direction (X) intersects with a thickness direction (Y) of the peripheral area (16).

6. The battery device according to claim 5, It is characterized in that The reinforcement area (12) comprises two side edges (123) that are opposite to each other along the preset direction (X), and each of the side edges (123) extends beyond the corresponding side portion (131) in the preset direction (X).

7. The battery device according to claim 6, It is characterized in that The dimension of the side edge (123) beyond the side portion (131) is denoted as L, wherein 20 mm ≤ L ≤ 50 mm.

8. The battery device according to claim 7, It is characterized in that L also satisfies the condition: 30mm≤L≤40mm.

9. The battery device according to claim 2, It is characterized in that The thickness of the reinforcement area (12) is denoted as h1, and the thickness of the peripheral area (16) is denoted as h2, wherein 3≤h1 / h2≤5.

10. The battery device according to claim 9, It is characterized in that h1 / h2 also satisfies the condition: 4≤h1 / h2≤5.

11. The battery device according to claim 9, It is characterized in that The condition that h1 satisfies is: 3mm≤h1≤5mm.

12. The battery device according to any one of claims 1 to 7, It is characterized in that The reinforcement area (12) and the installation component (13) each include a plurality of parts, the peripheral area (16) is arranged around the periphery of each reinforcement area (12), and at least one installation component (13) is arranged on the reinforcement area (12).

13. The battery device according to any one of claims 1 to 7, It is characterized in that The box cover also includes a fastener (15), which is arranged on the mounting component (13) and is at least partially located in the cavity (133), and the fastener (15) is used to connect with the seat.

14. The battery device according to any one of claims 1 to 7, It is characterized in that The peripheral area (16), the reinforcement area (12) and the mounting component (13) are all constructed to have a structure having a non-metallic composite material.

15. A box cover, It is characterized in that The box cover comprises: A cover body (11) comprises a reinforcement area (12) and a peripheral area (16) located outside the reinforcement area (12), wherein the structural strength of the reinforcement area (12) is greater than the structural strength of the peripheral area (16); A mounting component (13) is disposed on the reinforcement area (12), and a cavity (133) is provided in the mounting component (13); The reinforcing component (14) is arranged in the cavity (133).

16. An electrical device, It is characterized in that The electrical equipment includes: A battery device as claimed in any one of claims 1 to 14.

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