Battery cover and electronic device

Abstract

The present application relates to the technical field of electronic devices. Provided are a battery cover and an electronic device, which are used for solving the problems of the easy deformation and low yield of existing double-spliced battery covers. The battery cover provided by the present application comprises: a bottom plate, a first cover plate, a second cover plate, a Mylar sheet and a first adhesive layer, wherein the surface of the bottom plate comprises a first region and a second region, the second region comprising a first sub-region and a second sub-region, and the first sub-region surrounds the second sub-region in a single circle. The first cover plate is fixed on the first region, and the second cover plate is arranged on the second region. The second sub-region is bonded and fixed to the second cover plate by means of the first adhesive layer. The Mylar sheet is arranged between the second cover plate and the first sub-region, the surface of one side of the Mylar sheet is bonded and fixed to the second cover plate, and the surface of the other side of the Mylar sheet is bonded and fixed to the first sub-region. In the present application, the shrinkage stress generated during the curing of an adhesive is released using the deformation of the Mylar sheet, such that the risk of deformation of the battery cover can be reduced.

Description

Battery cover and electronics

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 21, 2023, with application number 202323167314.4 and invention name “A double-piece battery cover and electronic device”, and the Chinese patent application filed with the State Intellectual Property Office on December 29, 2023, with application number 202323669484.2 and invention name “Battery cover and electronic device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the technical field of electronic devices, and in particular to a battery cover and an electronic device. Background Art

[0003] With the development of electronic devices (such as mobile phones, tablet computers, etc.), the appearance and structure of battery covers of electronic devices are becoming more and more diversified. The battery covers of mid-to-high-end electronic devices generally begin to adopt a double-spliced ​​design (that is, the battery cover panel is made of two different materials, which has a better appearance and touch feel).

[0004] To ensure structural strength and impact resistance, existing double-piece battery covers are generally made of multi-layer bonding. When there are many bonding layers, the battery cover is prone to deformation, resulting in a low yield rate.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a battery cover and an electronic device, which are used to solve the problems of easy deformation and low yield of existing double-piece battery covers.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions:

[0008] In a first aspect, an embodiment of the present application provides a battery cover, which includes a base plate, a first cover plate, a second cover plate, a Mylar sheet, and a first adhesive layer.

[0009] The base plate surface includes a first area and a second area, the second area includes a first sub-area and a second sub-area, and the first sub-area is arranged around the second sub-area. A first cover plate is fixed to the first area, and a second cover plate is arranged on the second area. The second sub-area is bonded to the second cover plate via a first adhesive layer. A Mylar sheet is disposed between the second cover plate and the first sub-area, with one side of the Mylar sheet bonded to the second cover plate and the other side of the Mylar sheet bonded to the first sub-area.

[0010] The battery cover provided in the first aspect of the present application, on the one hand, is provided with a Mylar sheet between the second cover plate and the first sub-region on the base plate, and both side surfaces of the Mylar sheet are respectively bonded and fixed to the second cover plate and the first sub-region. For example, one side surface of the Mylar sheet is an adhesive surface, and the adhesive surface of the Mylar sheet is bonded and fixed to the second cover plate, and the other side surface of the Mylar sheet is bonded and fixed to the base plate by an adhesive. When the adhesive cures, part of the shrinkage stress generated by the adhesive will be dispersed to the Mylar sheet, and then the deformation of the Mylar sheet is used to release this part of the shrinkage stress, thereby reducing the risk of deformation of the battery cover due to excessive shrinkage stress when the adhesive cures.

[0011] On the other hand, when manufacturing the battery cover, pre-bonding the second cover plate and the base plate with the first adhesive layer not only prevents the second cover plate from slipping or misaligning relative to the base plate, but also controls the spacing between the second cover plate and the base plate (i.e., the spacing between the second cover plate and the base plate is equal to the thickness of the first adhesive layer) when the second cover plate and the base plate are subsequently pressed together, thereby preventing the spacing between the second cover plate and the base plate from being too small, which would cause adhesive overflow between the other side surface of the Mylar sheet and the first sub-region on the base plate.

[0012] In combination with the first aspect, in a possible implementation, the second region further includes a third sub-region, the third sub-region extends along an edge of the second region, and the third sub-region is bonded and fixed to the second cover plate via a second adhesive layer.

[0013] In this way, when manufacturing the battery cover, the second cover plate and the bottom plate are pre-bonded using the second adhesive layer and the first adhesive layer, which can further prevent the second cover plate from slipping and misaligning relative to the first cover plate. In addition, the third sub-region extends along the edge of the second region, that is, the third sub-region is annular. Correspondingly, the second adhesive layer in the third sub-region is also annular and extends along the edge of the second cover plate. This allows the second adhesive layer to support the edge of the second cover plate, and subsequently prevent the edge of the second cover plate from collapsing when the second cover plate and the bottom plate are pressed together.

[0014] In combination with the first aspect, in another possible implementation, a plurality of second sub-regions are provided, and the plurality of second sub-regions are distributed at intervals, and each second sub-region is bonded and fixed to the second cover plate by a first adhesive layer.

[0015] In this way, a first adhesive layer is provided in each second sub-region. During battery cover manufacturing, multiple first adhesive layers are used to pre-bond the second cover plate to the bottom plate, further preventing the second cover plate from slipping or misaligning relative to the first cover plate. Furthermore, the multiple, spaced-apart first adhesive layers provide uniform support for the second cover plate, preventing localized collapse of the second cover plate when the second cover plate and bottom plate are subsequently pressed together.

[0016] In conjunction with the first aspect, in another possible implementation, a mounting hole is defined in the battery cover, extending through the second cover plate, the Mylar layer, and the bottom plate along the thickness of the battery cover. This arrangement facilitates mounting a decorative cover for a camera in an electronic device within the mounting hole.

[0017] In combination with the first aspect, in another possible implementation, the second area further includes a fourth sub-area, the fourth sub-area extends around the mounting hole, and the fourth sub-area is bonded and fixed to the second cover plate via a third adhesive layer.

[0018] In this way, when manufacturing the battery cover, the second cover plate and the bottom plate are pre-bonded using the third adhesive layer and the first adhesive layer, which can further prevent the second cover plate from slipping and misaligning relative to the first cover plate. In addition, the fourth sub-region extends around the mounting hole, that is, the fourth sub-region is annular. Correspondingly, the third adhesive layer within the fourth sub-region is also annular and extends around the mounting hole, so that the third adhesive layer can support the edge of the mounting hole on the second cover plate. Subsequently, when the second cover plate and the bottom plate are pressed together, the edge of the mounting hole on the second cover plate can be prevented from collapsing.

[0019] In conjunction with the first aspect, in another possible implementation, the base plate includes a plate body and a raised portion, the raised portion being disposed on a surface of the plate body and dividing the surface of the plate body into a first area and a second area. With this arrangement, the raised portion can be used to completely separate the first cover plate from the second cover plate, preventing interference between the first and second cover plates.

[0020] In combination with the first aspect, in another possible implementation, the protrusion extends along the length direction of the battery cover from one side edge of the board body to the other side edge of the board body.

[0021] In combination with the first aspect, in another possible implementation, the second cover plate includes a transparent cover plate and a decorative film layer, one side surface of the decorative film layer is fixedly connected to the transparent cover plate, and the other side surface of the decorative film layer is bonded and fixed to the Mylar sheet and the first adhesive layer. With this arrangement, the user can observe the various colors, textures, and patterns on one side surface of the decorative film layer through the transparent cover plate, thereby enhancing the design and aesthetics of the battery cover. In addition, when the adhesive between the other side surface of the Mylar sheet and the first sub-region cures, a portion of the shrinkage stress generated by the adhesive will be dispersed to the Mylar sheet (using the deformation of the Mylar sheet to release this part of the shrinkage stress), and will not be directly transmitted to the decorative film layer, causing deformation of the decorative film layer, and thus resulting in poor lighting (for example, distortion of the pattern or texture on the decorative film layer).

[0022] In combination with the first aspect, in another possible implementation, the transparent cover is made of glass, thereby improving the touch feel of the battery cover.

[0023] In conjunction with the first aspect, in another possible implementation, multiple first regions and multiple first cover plates are provided, and the multiple first regions and multiple first cover plates are provided in a one-to-one correspondence. This configuration allows the multiple first cover plates to be combined to create a variety of patterns. When the multiple first cover plates are made of different materials, the battery cover can have a variety of tactile and visual qualities, thereby enhancing the user experience.

[0024] In conjunction with the first aspect, in another possible implementation, multiple second regions and multiple second cover plates are provided, and the multiple second regions and multiple second cover plates are provided in a one-to-one correspondence. This configuration allows the multiple second cover plates to be combined to create a variety of patterns. When the multiple second cover plates are made of different materials, the battery cover can have a variety of tactile and visual experiences, thereby enhancing the user experience.

[0025] In combination with the first aspect, in another possible implementation, the battery cover further includes a fourth adhesive layer, and the first sub-region is bonded and fixed to the Mylar sheet via the fourth adhesive layer.

[0026] In this way, the fourth adhesive layer is not directly bonded to the second cover plate, but is bonded to the Mylar sheet on the surface of the second cover plate, which is equivalent to using the Mylar sheet to separate the fourth adhesive layer from the second cover plate. When the fourth adhesive layer solidifies, the shrinkage stress generated by it will act on the Mylar sheet. The deformation of the Mylar sheet is used to release part of the shrinkage stress of the fourth adhesive layer, thereby avoiding the shrinkage stress of the fourth adhesive layer directly acting on the second cover plate and causing deformation of the second cover plate.

[0027] In combination with the first aspect, in another possible implementation, the fourth adhesive layer is hot melt adhesive.

[0028] In combination with the first aspect, in another possible implementation, the first adhesive layer is a foam double-sided adhesive tape.

[0029] In combination with the first aspect, in another possible implementation, the first cover is made of PU leather, thereby improving the touch feel of the battery cover.

[0030] In conjunction with the first aspect, in another possible implementation, the base plate is made of glass fiber. Glass fiber has high mechanical strength and heat resistance, and good insulation performance, and is more suitable for the environmental conditions in which the base plate is located.

[0031] In a second aspect, the present application provides an electronic device, which includes a frame, a battery, and the battery cover provided in the first aspect above.

[0032] The battery cover is fixed to the frame, and the frame and the battery cover form a receiving cavity, and the battery is disposed in the receiving cavity. It is understood that the beneficial effects achieved by the electronic device described in the second aspect and any possible implementation thereof provided above can be referred to the beneficial effects of the first aspect and any possible implementation thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic diagram of the overall structure of an electronic device provided in an embodiment of the present application;

[0034] FIG2 is an exploded view of the structure of the electronic device in FIG1 ;

[0035] FIG3 is an exploded view of the structure of a double-piece battery cover in the related art;

[0036] FIG4 is a schematic exploded view of the structure of a battery cover provided in an embodiment of the present application;

[0037] FIG5 is a front view of the bottom plate in FIG4 ;

[0038] FIG6 is a partial enlarged view of point B in FIG4;

[0039] FIG7 is a schematic diagram showing the distribution of the first area and the second area on the bottom plate of FIG4 ;

[0040] FIG8 is a schematic diagram of the first adhesive layer in FIG4 being bonded to the second sub-area;

[0041] FIG9 is a schematic diagram showing the distribution of the first area and the second area on another base plate provided by an embodiment of the present application;

[0042] FIG10 is an exploded schematic diagram of the structure of another battery cover provided in an embodiment of the present application;

[0043] FIG11 is a schematic diagram showing the distribution of the first sub-area, the second sub-area, and the third sub-area on the bottom plate of FIG10 ;

[0044] FIG12 is a schematic diagram of the first adhesive layer and the second adhesive layer in FIG10 being distributed and bonded to the second sub-region and the third sub-region;

[0045] FIG13 is an exploded view of another battery cover structure provided in an embodiment of the present application;

[0046] FIG14 is a schematic diagram showing the distribution of the first sub-area, the second sub-area, the third sub-area, and the fourth sub-area on the bottom plate of FIG13;

[0047] FIG15 is a schematic diagram of the first adhesive layer, the second adhesive layer, and the third adhesive layer in FIG13 being distributed and bonded to the second sub-region, the third sub-region, and the fourth sub-region;

[0048] FIG16 is an exploded view of another battery cover structure provided in an embodiment of the present application;

[0049] FIG17 is a front view of the battery cover in FIG16;

[0050] FIG18 is a schematic cross-sectional view taken along line AA in FIG17 .

[0051] Reference numerals:

[0052] 01. Electronic device; 10. Display module; 11. Translucent cover; 12. Display screen; 20. Housing; 21. Battery cover; 22. Frame; 23. Mid-panel; 30. Camera module; 40. Main board; 50. Camera decorative cover; 60. Battery; 70. Related technology: Double-piece battery cover; 71. Substrate; 72. Adhesive backing; 73. Spliced ​​panel; 731. First panel; 732. Second panel; 80. Battery cover; 81. Bottom plate; 811. Panel body; 8111 , first surface; 812, raised portion; 810, first area; 820, second area; 820a, first sub-area; 820b, second sub-area; 820c, third sub-area; 820d, fourth sub-area; 82, first cover plate; 83, second cover plate; 831, transparent cover plate; 832, decorative film layer; 84, Mylar sheet; 85, first adhesive layer; 86, second adhesive layer; 87, third adhesive layer; 88, fourth adhesive layer; 89, fifth adhesive layer; 800, mounting hole. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the application more clear, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0054] In the description of this application, it should be clarified that the terms "vertical," "transverse," "longitudinal," "front," "rear," "left," "right," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely to facilitate the description of this application. They do not imply that the devices or components referred to must have specific orientations or positions, and therefore should not be construed as limitations on this application. The term "quantity" should also not be construed as a limitation on this application.

[0055] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0056] An embodiment of the present application provides an electronic device. Specifically, the electronic device may be a portable electronic device or other type of electronic device. For example, the electronic device may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a monitor, a camera, a personal computer, a notebook computer, a wearable device, etc. For ease of description, the following examples are all based on the example of a mobile phone as the electronic device.

[0057] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the overall structure of an electronic device 01 provided in an embodiment of the present application, and Figure 2 is an exploded view of the structure of electronic device 01 in Figure 1. As can be seen from the above, in this embodiment, electronic device 01 is a mobile phone and can have a substantially rectangular plate-like structure. Electronic device 01 can include a display module 10, a housing 20, a camera module 30, a mainboard 40, a camera decorative cover 50, and a battery 60.

[0058] It is understandable that FIG1 and FIG2 merely schematically illustrate some components included in the electronic device 01 , and the actual shape, actual size, actual position and actual structure of these components are not limited by FIG1 and FIG2 .

[0059] The above-mentioned display module 10 is used to display images, videos, etc. The display module 10 may include a translucent cover plate 11 and a display screen 12 (English name: panel, also called a display panel), and the translucent cover plate 11 and the display screen 12 are stacked. The material of the translucent cover plate 11 includes but is not limited to glass. For example, the translucent cover plate 11 can adopt an ordinary translucent cover plate to protect the display screen to avoid damage to the display screen due to external force, and it can also play a dust-proof role. Alternatively, the translucent cover plate 11 can also adopt a translucent cover plate with a touch function, so that the electronic device 01 has a touch function, which makes it more convenient for users to use. Therefore, the present application does not specifically limit the specific material of the translucent cover plate 11.

[0060] Furthermore, the display screen 12 may be a flexible display screen or a rigid display screen. For example, the display screen 12 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, or a liquid crystal display (LCD) display screen.

[0061] The housing 20 is used to protect the electronic components inside the electronic device 01. The housing 20 may include a battery cover 21 and a frame 22. The battery cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the light-transmitting cover plate 11 and the battery cover 21. The battery cover 21 is fixed to the frame 22. For example, the battery cover 21 can be fixed to the frame 22 by bonding, threading, welding, snapping, etc. The light-transmitting cover plate 11 can be fixed to the frame 22 by gluing, so that the light-transmitting cover plate 11, the battery cover 21 and the frame 22 form a receiving cavity inside the electronic device 01. The display screen 12, the main board 40 and the camera module 30 are all arranged in the internal receiving space.

[0062] The motherboard 40 is used to house the electronic components of the electronic device 10 and to electrically connect the components. The battery 60 is electrically connected to the motherboard 40 to provide power to the electronic components. For example, the electronic components may be a control chip (e.g., a system-on-chip (SOC)), a graphics processing unit (GPU), a universal flash storage (UFS), an earpiece, a flash module, and the linear motor 60.

[0063] In some embodiments, the housing 20 may further include a middle plate 23, which is disposed in the accommodating cavity and is located on the side of the display screen 12 away from the light-transmitting cover plate 11. The middle plate 23 is fixedly connected to the frame 22 to form the middle frame of the electronic device 10. For example, the middle plate 23 and the frame 22 may be fixedly connected by gluing, threading, welding, snapping, etc.; or, the middle plate 23 and the frame 22 may be an integrally formed structure, that is, the middle plate 23 and the frame 22 form a structural component as a whole. The middle plate 23 divides the accommodating cavity into two independent spaces, one of which is located between the light-transmitting cover plate 11 and the middle plate 23, and the display screen 12 is located in this space. The other space is located between the middle plate 23 and the battery cover 21, and the main board 40, camera module 30 and battery 60 are all disposed in this space.

[0064] For the convenience of the following description, an XYZ coordinate system is established, where the width of the battery cover is the X-axis, the length of the battery cover is the Y-axis, and the thickness of the battery cover is the Z-axis. The thickness of the battery cover corresponds to the thickness of the electronic device, the length of the battery cover corresponds to the length of the electronic device, and the width of the battery cover corresponds to the width of the electronic device.

[0065] Please refer to FIG. 3 , which is an exploded view of the structure of a double-piece battery cover 70 in the related art.

[0066] Specifically, the related technology double-split battery cover 70 may include a substrate 71, a splicing panel 73 and a backing glue 72, wherein the splicing panel 73 includes a first panel 731 and a second panel 732 of different materials, and the first panel 731 and the second panel 732 are both bonded and fixed to the surface of the substrate 71 by the backing glue 72.

[0067] During manufacturing, the volume of the back glue 72 will gradually shrink during the curing process and generate shrinkage stress. Most of the shrinkage stress will directly act on the splicing panel 73 and the substrate 71, which may easily cause deformation of the related technology double-spliced ​​battery cover 70 (such as local dents, etc.).

[0068] To solve the above problem, an embodiment of the present application provides a battery cover 80 , which can be applied to the above electronic device 01 , that is, the battery cover 80 is fixed on the above frame 22 .

[0069] Referring to Figures 4, 5, and 6, Figure 4 is an exploded schematic diagram of the structure of a battery cover 80 provided in an embodiment of the present application, Figure 5 is a front view (parallel to the XY plane) of the bottom plate 81 in Figure 4, and Figure 6 is a partial enlarged view of point B in Figure 4. The battery cover 80 is provided with a mounting hole 800 extending through the battery cover 80 along its thickness (Z-axis direction). The mounting hole 800 is used to mount the camera decorative cover 50 of the electronic device.

[0070] The shape of the mounting hole 800 can be regular or irregular, such as circular, elliptical, rectangular, etc., as long as it is compatible with the outer contour of the camera decorative cover 50 , which will not be elaborated here.

[0071] The battery cover 80 may include a bottom plate 81 , a first cover plate 82 , a second cover plate 83 , a Mylar sheet 84 and a first adhesive layer 85 .

[0072] The surface of the bottom plate 81 includes a first area 810 and a second area 820. It should be noted that the shapes and sizes of the first area 810 and the second area 820 may be the same or different.

[0073] The material of the bottom plate 81 can be glass fiber, aramid fiber, or other materials with high mechanical strength, heat resistance, and good insulation performance, and this application does not impose any special restrictions on this.

[0074] In some embodiments, the bottom plate 81 may include a plate body 811 and a raised portion 812 , wherein the raised portion 812 is provided on the surface of the plate body 811 and divides the surface of the plate body 811 into a first area 810 and a second area 820 .

[0075] The raised portion 812 can extend from one edge of the plate body 811 to the other edge of the plate body 811 along the length of the battery cover 80. Alternatively, the raised portion 812 can extend from one edge of the plate body 811 to the other edge of the plate body 811 along the width of the battery cover 80. Alternatively, the raised portion 812 can be annular, with the first region 810 located inside the raised portion 812 and the second region 820 located outside the raised portion 812. It is understood that the raised portion 812 can also extend in other directions, as long as it can separate the surface of the plate body 811 into the first region 810 and the second region 820, and this application does not specifically limit this.

[0076] This application does not impose any particular limitation on the location of the mounting hole 800. For example, the mounting hole 800 may be located in the first region 810 of the base plate 81, or in the second region 820 of the base plate 81, or the mounting hole 800 may span between the first region 810 and the second region 820 of the base plate 81.

[0077] For example, please continue to refer to Figures 4, 5, and 6. The board body 811 of the bottom plate 81 is a rectangular plate structure. The board body 811 has a first surface 8111 facing the outside of the electronic device 01 and a second surface (not shown) facing the inside of the electronic device 01. The raised portion 812 is an elongated strip-shaped structure. The raised portion 812 is provided on the first surface 8111 of the board body 811 and extends from one side edge of the board body 811 to the other side edge of the board body 811 along the length direction (Y-axis direction) of the battery cover 80. As a result, the first surface 8111 of the board body 811 is divided into a first area 810 and a second area 820 by the raised portion 812. The right side of the raised portion 812 in the illustrated direction is the first area 810, and the left side of the raised portion 812 in the illustrated direction is the second area 820. The first area 810 and the second area 820 have the same shape and area, and are centrally symmetrically arranged. The mounting hole 800 is provided on the second region 820 , and the mounting hole 800 is elliptical in shape.

[0078] It should be noted that the plate body 811 and the raised portion 812 can be a separate structure or can be connected to form an integral structure. When the integral structure is formed, the plate body 811 and the raised portion 812 are a whole, without a partition between them. Compared with the separate structure, the integral structure is stronger and more secure, and is also easier to assemble.

[0079] Based on the above, the first cover plate 82 is fixed to the first region 810. It is understood that the first cover plate 82 and the base plate 81 can be fixed by bonding, snapping, or other methods. For example, referring to Figures 4, 5, and 6, the battery cover 80 further includes a fifth adhesive layer 89, through which the first cover plate 82 is bonded and fixed to the first region 810 of the base plate 811.

[0080] The material of the first cover plate 82 can be PU leather, PE leather or natural leather, etc., and this application does not impose any special limitation on this.

[0081] Furthermore, the second region 820 includes a first sub-region 820a and a second sub-region 820b. The first sub-region 820a is arranged around the second sub-region 820b. It should be noted that the first sub-region 820a is arranged around the second sub-region 820b, that is, the portion of the second region 820 other than the second sub-region 820b belongs to the first sub-region 820a, which is equivalent to the second sub-region 820b being embedded in the first sub-region 820a, and the second sub-region 820b being surrounded by the first sub-region 820a.

[0082] Mylar sheet 84 is disposed between second cover plate 83 and first sub-region 820a. One side of Mylar sheet 84 is bonded to second cover plate 83, while the other side of Mylar sheet 84 is bonded to first sub-region 820a. Second sub-region 820b is bonded to second cover plate 83 via first adhesive layer 85.

[0083] It is understandable that the Mylar sheet 84 may cover the entire first sub-region 820a or may cover part of the first region 810, and this application does not impose any special limitation on this.

[0084] The first adhesive layer 85 can be a double-sided foam tape, such as PE (Polyethylene) double-sided foam tape, EVA (Ethylene-Vinyl Acetate copolymer) double-sided foam tape, PU (Poly Urethane) double-sided foam tape, acrylic double-sided foam tape, etc.

[0085] In this way, the two side surfaces of the Mylar sheet 84 are respectively bonded and fixed to the second cover plate 83 and the first sub-area 820a of the base plate 81. For example, one side surface of the Mylar sheet 84 is an adhesive surface, and the adhesive surface of the Mylar sheet 84 is bonded and fixed to the second cover plate 83, and the other side surface of the Mylar sheet 84 is bonded and fixed to the base plate 81 through an adhesive. When the adhesive cures, part of the shrinkage stress generated by the adhesive will be dispersed to the Mylar sheet 84, and then the deformation of the Mylar sheet 84 will be used to release this part of the shrinkage stress, thereby reducing the risk of deformation of the battery cover 80 due to excessive shrinkage stress during the curing of the adhesive.

[0086] It should be noted that the second area 820 and the second cover plate 83 can be provided with one or more. When the second area 820 and the second cover plate 83 are provided with multiple, the multiple second areas 820 and the multiple second cover plates 83 are provided in a one-to-one correspondence. Among them, the material and shape of the multiple second cover plates 83 can be the same or different, and this application does not impose any special restrictions on this. With this arrangement, multiple second cover plates 83 can be used to splice out a variety of patterns, and when the materials of the multiple second cover plates 83 are different, the battery cover 80 can have a variety of touches and appearances, which can enhance the user experience.

[0087] Similarly, the first region 810 and the first cover plate 82 may each be provided in one piece or in multiple pieces. When multiple first regions 810 and multiple first cover plates 82 are provided, the multiple first regions 810 and the multiple first cover plates 82 are provided in a one-to-one correspondence. The materials and shapes of the multiple first cover plates 82 may be the same or different, and this application does not impose any particular restrictions on this.

[0088] For example, please refer back to Figure 4. A first cover plate 82 and a second cover plate 83 are provided, and a first region 810 and a second region 820 are provided on the plate body 811. The mounting hole 800 is provided in the second region 820 and is elliptical in shape.

[0089] The second sub-region 820b can be provided as one or more, and this application does not impose any special restrictions on this. Among them, when there are multiple second sub-regions 820b, the multiple second sub-regions 820b are spaced apart. The shapes of the multiple second sub-regions 820b can be the same or different. At this time, there are also multiple first adhesive layers 85, so that each second sub-region 820b is bonded and fixed to the second cover plate 83 through a first adhesive layer 85. In this way, the multiple spaced-apart first adhesive layers 85 can evenly support the second cover plate 83, and when the second cover plate 83 and the base plate 81 are pressed together, the second cover plate 83 can be prevented from partially collapsing.

[0090] The second sub-region 820b may be in a regular or irregular shape such as a circle, a rectangle, a trapezoid, etc., and this application does not impose any special limitation on this.

[0091] In this embodiment, please refer to Figures 7 and 8. Figure 7 is a schematic diagram of the distribution of the first area 810 and the second area 820 on the base plate 81 in Figure 4 (parallel to the XY plane). Figure 8 is a schematic diagram of the first adhesive layer 85 in Figure 4 being bonded to the second sub-area 820b (parallel to the XY plane). In the figure, the second sub-area 820b is provided with a ridge located below the mounting hole 800. The shape of the second sub-area 820b is a combination of a rectangle and a trapezoid, that is, the blank area surrounded by the dotted line in Figure 7. The remaining shaded area is the first sub-area 820a. Correspondingly, the first adhesive layer 85 is also provided with a ridge, and the outer contour shape of the first adhesive layer 85 (parallel to the XY plane) matches the outer contour shape of the second sub-area 820b (parallel to the XY plane).

[0092] In other embodiments, please refer to FIG9 , which is a schematic diagram (parallel to the XY plane) illustrating the distribution of a first sub-region 820a and a second sub-region 820b on the bottom plate 81 of another battery cover 80 provided in an embodiment of the present application. Two second sub-regions 820b are provided, both located below the mounting hole 800. Both second sub-regions 820b are rectangular, i.e., the blank areas enclosed by the dotted lines in FIG9 , and the remaining shaded areas are the first sub-regions 820a.

[0093] Please refer back to Figure 4. The second cover plate 83 may include a transparent cover plate 831 and a decorative film layer 832. One side surface of the decorative film layer 832 is fixedly connected to the transparent cover plate 831. For example, the decorative film layer 832 may be adhered to a transparent panel, or the decorative film layer 832 may be directly formed on the transparent cover plate 831 by spraying, electroplating, evaporation, etc. With this arrangement, the user can observe the various colors, textures, and patterns on one side surface of the decorative film layer 832 through the transparent cover plate 831, thereby enhancing the design and aesthetics of the battery cover 80. The material of the transparent cover plate 831 may be glass, crystal, plastic, etc., and this application does not impose any special restrictions on this.

[0094] The Mylar sheet 84 is located between the other side surface of the decorative film layer 832 and the first sub-region 820 a on the board body 811 . The Mylar sheet 84 and the first adhesive layer 85 are bonded and fixed to the other side surface of the decorative film layer 832 .

[0095] In this way, by arranging the Mylar sheet 84 between the decorative film layer 832 on the second cover plate 83 and the first sub-region 820a on the plate body 811, the two side surfaces of the Mylar sheet 84 are respectively bonded and fixed to the decorative film layer 832 and the first sub-region 820a. For example, one side surface of the Mylar sheet 84 is an adhesive surface, and the adhesive surface of the Mylar sheet 84 is bonded and fixed to the decorative film layer 832, and the other side surface of the Mylar sheet 84 is bonded and fixed to the first sub-region 820a on the base plate 81 through an adhesive. When the adhesive cures, part of the shrinkage stress generated by it will be dispersed to the Mylar sheet 84 (using the deformation of the Mylar sheet 84 to release this part of the shrinkage stress), and will not be directly transmitted to the decorative film layer 832 to cause deformation of the decorative film layer 832, thereby reducing the risk of poor light and shadow on the second cover plate 83 (for example, distortion or deformation of the pattern or texture on the decorative film layer 832).

[0096] Furthermore, during the manufacture of the battery cover 80, the first adhesive layer 85 is first used to pre-bond the side of the second cover plate 83 provided with the decorative film layer 832 to the plate body 811. This not only prevents the second cover plate 83 from slipping or misaligning relative to the plate body 811, but also, during the subsequent lamination of the second cover plate 83 and the plate body 811, the first adhesive layer 85 controls the distance between the second cover plate 83 and the plate body 811 (i.e., the distance between the second cover plate 83 and the plate body 811 is equal to the thickness of the first adhesive layer 85). This prevents the adhesive between the other surface of the Mylar sheet 84 and the plate body 811 from overflowing beyond the first sub-region 820a due to the distance between the second cover plate 83 and the plate body 811 being too small.

[0097] In some embodiments, the second region 820 further includes a third sub-region 820 c , and the third sub-region 820 c extends along the edge of the second region 820 . The third sub-region 820 c is bonded and fixed to the second cover plate 83 via a second adhesive layer 86 .

[0098] For example, see Figures 10, 11, and 12. Figure 10 is an exploded view of the structure of another battery cover 80 provided in an embodiment of the present application. Figure 11 is a schematic diagram (parallel to the XY plane) showing the distribution of the first sub-region 820a, the second sub-region 820b, and the third sub-region 820c on the bottom plate 81 in Figure 10. Figure 12 is a schematic diagram (parallel to the XY plane) showing the first adhesive layer 85 and the second adhesive layer 86 in Figure 10 being bonded to the second sub-region 820b and the third sub-region 820c.

[0099] As can be seen, the battery cover 80 in Figure 10 is equivalent to the battery cover 80 in Figure 4 above, with a third sub-area 820c divided from the second area 820 of the plate body 811, and a second adhesive layer 86 added between the second cover plate 83 and the plate body 811. The third sub-area 820c is annular and extends along the edge of the second area 820. The second adhesive layer 86 is also annular and located within the third sub-area 820c. The outer contours (parallel to the XY plane) of the third sub-area 820c and the second adhesive layer 86 coincide with the outer contour (parallel to the XY plane) of the second area 820. The portion of the second area 820 other than the second sub-area 820b and the third sub-area 820c belongs to the first sub-area 820a (i.e., the shaded portion in Figure 11).

[0100] Thus, during the manufacture of the battery cover 80, the second cover plate 83 and the plate body 811 are pre-bonded using the second adhesive layer 86 and the first adhesive layer 85, further preventing the second cover plate 83 from slipping or misaligning relative to the plate body 811. Furthermore, the second adhesive layer 86 within the third subregion 820c supports the edge of the second cover plate 83, preventing the edge of the second cover plate 83 from collapsing when the second cover plate 83 and the plate body 811 are subsequently pressed together.

[0101] In some embodiments, the second region 820 further includes a fourth sub-region 820 d . The fourth sub-region 820 d extends around the mounting hole 800 . The fourth sub-region 820 d is bonded and fixed to the second cover plate 83 via a third adhesive layer 87 .

[0102] For example, see Figures 13, 14, and 15. Figure 13 is an exploded view of the structure of another battery cover 80 provided in an embodiment of the present application. Figure 14 is a schematic diagram (parallel to the XY plane) showing the distribution of the first sub-region 820a, the second sub-region 820b, the third sub-region 820c, and the fourth sub-region 820d on the bottom plate 81 in Figure 13. Figure 15 is a schematic diagram (parallel to the XY plane) showing the first adhesive layer 85, the second adhesive layer 86, and the third adhesive layer 87 in Figure 13 being distributed and bonded to the second sub-region 820b, the third sub-region 820c, and the fourth sub-region 820d.

[0103] As can be seen, the battery cover 80 in Figure 13 is equivalent to the battery cover 80 in Figure 10 , except that a fourth sub-area 820d is further divided on the second area 820 of the panel body 811, and a third adhesive layer 87 is added between the second cover plate 83 and the panel body 811. The mounting hole 800 sequentially passes through the glass panel, the decorative film layer 832, the Mylar layer, and the panel body 811 along the thickness direction (Z-axis direction) of the battery cover 80. The fourth sub-area 820d and the third adhesive layer 87 are both annular, with the fourth sub-area 820d circling the outside of the mounting hole 800, and the third adhesive layer 87 located within the fourth sub-area. The outer contours (parallel to the XY plane) of the fourth sub-area 820d and the third adhesive layer 87 both match the outer contour (parallel to the XY plane) of the mounting hole 800. All parts of the second region 820 except the second sub-region 820b, the third sub-region 820c and the fourth sub-region 820d belong to the first sub-region 820a (ie, the shaded part in the figure).

[0104] Thus, during the manufacture of the battery cover 80, the third adhesive layer 87, the second adhesive layer 86, and the first adhesive layer 85 can be used to pre-bond the side of the second cover plate 83 provided with the decorative film layer 832 to the plate body 811, further preventing the second cover plate 83 from slipping or misaligning relative to the plate body 811. Furthermore, the third adhesive layer 87 within the fourth subregion 820d can support the edge of the mounting hole 800 in the second cover plate 83, preventing the edge of the mounting hole 800 in the second cover plate 83 from collapsing when the second cover plate 83 and the plate body 811 are pressed together.

[0105] Furthermore, the battery cover 80 includes a fourth adhesive layer 88. One side of the Mylar sheet 84 is bonded to the decorative film layer 832 on the second cover plate 83, and the other side of the Mylar sheet 84 is bonded to the first sub-region 820a on the bottom plate 81 via the fourth adhesive layer 88.

[0106] For example, see Figures 16, 17, and 18. Figure 16 is an exploded view of another embodiment of the battery cover 80 provided in the present application. Figure 17 is a front view (parallel to the XY plane) of the battery cover 80 in Figure 16. Figure 18 is a cross-sectional view taken at AA in Figure 17.

[0107] One side of the Mylar sheet 84 is adhesively bonded to the second cover plate 83 , and the other side of the Mylar sheet 84 is adhesively bonded to the first sub-region 820 a via a fourth adhesive layer 88 .

[0108] 16 is equivalent to the battery cover 80 in FIG13 above, with a fourth adhesive layer 88 added between the decorative film layer 832 and the board body 811. The fourth adhesive layer 88 can be hot melt adhesive, UV adhesive, thermosetting adhesive, etc.

[0109] The adhesive surface of the Mylar sheet 84 is bonded and fixed to the decorative film layer 832 on the second cover plate 83 , and the other surface of the Mylar sheet 84 is bonded and fixed to the first sub-region 820 a on the plate body 811 via the fourth adhesive layer 88 .

[0110] In this way, the fourth adhesive layer 88 is not directly bonded to the decorative film layer 832 on the second cover plate 83, but is bonded to the Mylar sheet 84, which is equivalent to using the Mylar sheet 84 to separate the fourth adhesive layer 88 from the decorative film layer 832. When the fourth adhesive layer 88 is cured, part of the shrinkage stress generated in the fourth adhesive layer 88 will be dispersed to the Mylar sheet 84 (using the deformation of the Mylar sheet 84 to release this part of the shrinkage stress), and will not be directly transmitted to the decorative film layer 832 to cause deformation of the decorative film layer 832, thereby reducing the risk of poor light and shadow on the second cover plate 83 (for example, distortion or deformation of the pattern or texture on the decorative film layer 832, etc.).

[0111] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0112] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A battery cover, characterized in that: include: A bottom plate, wherein the surface of the bottom plate includes a first area and a second area; the second area includes a first sub-area and a second sub-area, and the first sub-area is arranged around the second sub-area; A first cover plate, fixed on the first area; A second cover plate, disposed on the second area; A Mylar sheet is disposed between the second cover plate and the first sub-region, one side surface of the Mylar sheet is bonded and fixed to the second cover plate, and the other side surface of the Mylar sheet is bonded and fixed to the first sub-region; A first adhesive layer, wherein the second sub-region is bonded and fixed to the second cover plate through the first adhesive layer.

2. The battery cover according to claim 1, characterized in that: The second region further includes a third sub-region, and the third sub-region extends along an edge of the second region. The third sub-region is bonded and fixed to the second cover plate via a second adhesive layer.

3. The battery cover according to claim 1, characterized in that: A plurality of the second sub-regions are provided, and the plurality of the second sub-regions are distributed at intervals, and each of the second sub-regions is bonded and fixed to the second cover plate by the first adhesive layer.

4. The battery cover according to any one of claims 1 to 3, characterized in that: The battery cover is provided with a mounting hole, and the mounting hole penetrates the second cover plate, the Mylar layer and the bottom plate along the thickness direction of the battery cover.

5. The battery cover according to claim 4, characterized in that: The second region further includes a fourth sub-region, the fourth sub-region extends around the mounting hole, and the fourth sub-region is bonded and fixed to the second cover plate via a third adhesive layer.

6. The battery cover according to any one of claims 1 to 5, characterized in that: The bottom plate includes a plate body and a raised portion, wherein the raised portion is disposed on a surface of the plate body and divides the surface of the plate body into the first area and the second area.

7. The battery cover according to claim 6, characterized in that: The protrusion extends from one side edge of the board body to the other side edge of the board body along the length direction of the battery cover.

8. The battery cover according to any one of claims 1 to 7, characterized in that: The second cover plate includes a transparent cover plate and a decorative film layer, one side surface of the decorative film layer is fixedly connected to the transparent cover plate, and the other side surface of the decorative film layer is bonded and fixed to the Mylar sheet and the first adhesive layer.

9. The battery cover according to any one of claims 1 to 8, characterized in that: A plurality of the first regions and a plurality of the first cover plates are provided, and the plurality of the first regions and the plurality of the first cover plates are provided in a one-to-one correspondence.

10. The battery cover according to any one of claims 1 to 9, characterized in that: The second regions and the second cover plates are both provided in plurality, and the plurality of second regions and the plurality of second cover plates are provided in one-to-one correspondence.

11. The battery cover according to any one of claims 1 to 10, characterized in that: The battery cover further includes a fourth adhesive layer, and the first sub-region is bonded and fixed to the Mylar sheet via the fourth adhesive layer.

12. The battery cover according to claim 11, characterized in that: The fourth adhesive layer is hot melt adhesive.

13. An electronic device, characterized in that: The invention comprises a frame, a battery and a battery cover according to any one of claims 1 to 12, wherein the battery cover is fixed to the frame, the frame and the battery cover are arranged to form a receiving cavity, and the battery is arranged in the receiving cavity.

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