Electronic device

Abstract

The utility model provides electronic equipment. The electronic equipment comprises a battery; a wireless charging coil; the ferromagnetic shielding layer is attached to the surface, facing one side of the wireless charging coil, of the battery or attached to the surface of a component between the battery and the wireless charging coil; the ferromagnetic shielding layer is used for shielding a magnetic field generated by the wireless charging coil; the ferromagnetic shielding layer replaces an original ferromagnetic shielding part, and the saved structural space can be used for increasing the thickness of the battery, so that the capacity of the battery is improved, or the thickness of the electronic equipment is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and more specifically, to an electronic device. Background Art

[0002] The internal space of electronic devices is very valuable. Providing as many functions as possible and as long a battery life as possible while limiting the space and weight of the electronic device itself can improve the product competitiveness of the electronic device.

[0003] Among them, the space utilization rate in the thickness direction of the battery is improved, which can greatly increase the battery capacity. However, the flexible printed circuit (FPC) used for wireless charging in electronic devices is usually placed between the battery and the battery cover, occupying a thickness space of 0.15mm to 0.17mm. Among them, the thickness of the ferromagnetic shielding part in the wireless charging FPC is about 0.08mm, which limits the space for increasing the battery capacity. Utility Model Content

[0004] The present application provides an electronic device, which can increase the capacity of a battery in the electronic device.

[0005] In a first aspect, an electronic device is provided, comprising: a battery; a wireless charging coil; a ferromagnetic shielding layer, the ferromagnetic shielding layer being attached to a surface of the battery facing the wireless charging coil, or to a surface of a component between the battery and the wireless charging coil; the thickness of the ferromagnetic shielding layer being less than or equal to 0.04 mm; and the ferromagnetic shielding layer being used to shield a magnetic field generated by the wireless charging coil.

[0006] In the embodiments provided in the present application, a ferromagnetic shielding layer for shielding the magnetic field generated by the wireless charging coil is attached to the surface of the battery facing the wireless charging coil, or a ferromagnetic shielding layer for shielding the magnetic field generated by the wireless charging coil is attached to the component between the battery and the wireless charging coil, thereby replacing the original ferromagnetic shielding component. The saved structural space can be used to increase the thickness of the battery to increase the battery capacity, or to reduce the thickness of the electronic device to improve the user experience.

[0007] In combination with the first aspect, in some implementations of the first aspect, a projection of the ferromagnetic shielding layer in the thickness direction at least covers a projection of the wireless charging coil in the thickness direction.

[0008] Based on the above technical solution, the projection of the ferromagnetic shielding layer in the thickness direction at least completely covers the projection of the wireless charging coil in the thickness direction, so as to fully shield the magnetic field in the wireless charging coil to ensure the normal operation of other electronic components in the electronic device.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the ferromagnetic shielding layer is formed by chemical vapor deposition (CVD) or spraying.

[0010] In the embodiments provided in the present application, the ferromagnetic shielding layer produced by chemical vapor deposition (CVD) or spraying is relatively thin, which can effectively provide structural space for increasing the thickness of the battery, improving the battery capacity, or reducing the thickness of the electronic device, thereby improving the user experience.

[0011] In combination with the first aspect, in some implementations of the first aspect, the component between the battery and the wireless charging coil includes a heat sink, and the ferromagnetic shielding layer is attached to a surface of the heat sink facing the wireless charging coil.

[0012] In combination with the first aspect, in some implementations of the first aspect, the heat sink includes any one of graphite, a liquid cooling film, or a vacuum chamber heat sink VC.

[0013] In combination with the first aspect, in certain implementations of the first aspect, the electronic device also includes a first back cover, the first back cover is located on a side of the wireless charging coil away from the battery, the first back cover and the wireless charging coil are connected by an adhesive component, and the ferromagnetic shielding layer is attached to a surface of the heat sink facing the wireless charging coil.

[0014] In the embodiment provided in the present application, a heat sink for dissipating heat from the battery is provided between the battery and the wireless charging coil. The ferromagnetic shielding layer is attached to the heat sink, thereby avoiding the introduction of new parts. The magnetic field in the wireless charging coil is shielded on the basis of the existing structure, thereby saving structural space inside the electronic device, thereby reducing the thickness of the electronic device or increasing the capacity of the battery, thereby improving the user experience.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the electronic device also includes a first back cover, the first back cover is located on a side of the wireless charging coil away from the battery, the first back cover and the wireless charging coil are connected by an adhesive component, and the ferromagnetic shielding layer is attached to a surface of the battery on a side facing the wireless charging coil.

[0016] In the embodiment provided in the present application, a ferromagnetic shielding layer is attached to the surface of the battery facing the wireless charging coil, which can avoid the introduction of new parts. On the basis of the existing structure, the shielding of the magnetic field in the wireless charging coil is achieved, and the structural space inside the electronic device is saved, thereby reducing the thickness of the electronic device or increasing the capacity of the battery, thereby improving the user experience.

[0017] In combination with the first aspect, in certain implementations of the first aspect, the electronic device also includes a battery cover and a back cover, the battery cover is located between the wireless charging coil and the battery, the battery cover includes a recessed area, the recessed area is used to accommodate the wireless charging coil, the back cover is used to cover the recessed area, and the ferromagnetic shielding layer is attached to the surface of the recessed area on a side facing the wireless charging coil.

[0018] In the embodiment provided in the present application, the back cover of the electronic device adopts a split design, the wireless charging coil is arranged between the battery cover and the back cover, and the ferromagnetic shielding layer can be attached to the surface of the battery cover facing the wireless charging coil, thereby saving structural space inside the electronic device, thereby thinning the electronic device or increasing the battery capacity, thereby improving the user experience.

[0019] In combination with the first aspect, in some implementations of the first aspect, the electronic device also includes a second back cover, the wireless charging coil is embedded in the second back cover, and the ferromagnetic shielding layer is attached to the surface of the second back cover facing the wireless charging coil.

[0020] In the embodiment provided in the present application, a wireless charging coil is embedded in the second back cover of the electronic device, and a ferromagnetic shielding layer is attached to the surface of the second back cover facing the wireless charging coil, thereby reducing the structural space occupied by the wireless charging coil in the electronic device and replacing the original ferromagnetic shielding component, thereby saving the structural space inside the electronic device, reducing the thickness of the electronic device or increasing the battery capacity, and improving the user experience.

[0021] In combination with the first aspect, in some implementations of the first aspect, a material constituting the ferromagnetic shielding layer includes at least one of an iron-silicon alloy, an iron-nickel alloy, or a ferrite.

[0022] In the embodiments provided in the present application, materials such as iron-silicon alloy, iron-nickel alloy or ferrite have good magnetic shielding performance, which can effectively shield the magnetic field generated by the wireless charging coil when working, so that other electronic components in the electronic device can work normally.

[0023] In some possible implementations, the constituent material of the ferromagnetic shielding layer may be at least one of iron-silicon alloy particles, iron-nickel alloy particles, or ferrite particles.

[0024] In combination with the first aspect, in certain implementations of the first aspect, the operating frequency of the ferromagnetic shielding layer is greater than or equal to 100Khz and less than or equal to 150KHz, the magnetic permeability is greater than or equal to 1000H / m and less than or equal to 8000H / m, and the magnetic loss coefficient is greater than or equal to 0.04 and less than or equal to 0.08. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an exploded diagram of the structure of an electronic device.

[0026] Figure 2 It is a structural explosion diagram of an electronic device provided in an embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of an electronic device provided in an embodiment of the present application.

[0028] Figure 4 It is a structural explosion diagram of another electronic device provided in an embodiment of the present application.

[0029] Figure 5 It is a schematic cross-sectional structure diagram of another electronic device provided in an embodiment of the present application.

[0030] Figure 6 This is a structural explosion diagram of another electronic device provided in an embodiment of the present application.

[0031] Figure 7 It is a schematic cross-sectional structure diagram of another electronic device provided in an embodiment of the present application.

[0032] Figure 8 This is a structural explosion diagram of another electronic device provided in an embodiment of the present application.

[0033] Fig. 9 It is a schematic cross-sectional structure diagram of another electronic device provided in an embodiment of the present application.

[0034] Fig.10 This is a top view of a back cover of another electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0036] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. appearing in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0037] The terms "include", "comprising", "having" and variations thereof all mean "including but not limited to", unless specifically emphasized otherwise.

[0038] In the embodiments of the present application, the number of nouns, unless otherwise specified, means "singular noun or plural noun", that is, "one or more". "At least one" means one or more, "plural" means two or more, and "multiple" in "one or more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. For example, A / B means: A or B. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c means: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0039] In the embodiments of the present application, the same reference numerals are used to represent the same components or the same structural parts. For the same structural parts in the embodiments of the present application, only one of the structural parts may be marked with a reference numeral in the figure as an example. It should be understood that the reference numerals are also applicable to other identical structural parts. In addition, the various components in the figures are not drawn to scale, and the dimensions and sizes of the structural parts shown in the figures are only exemplary and should not be understood as limiting the present application.

[0040] Figure 1 It is a structural exploded diagram of an electronic device. The embodiment of the present application takes a mobile phone as an example to describe the structure of a battery cover and a battery system in the electronic device. The electronic device may also be a tablet computer, a laptop computer, a smart watch, etc., and the present application does not limit this.

[0041] like Figure 1As shown, the electronic device 100 may include components such as a battery cover 110, a wireless charging FPC 120, a battery 130, and a mainboard 140. Among them, the battery cover 110 can be made of a material with insulating properties such as glass, ceramic, fiber or leather. When the back cover of the electronic device 100 adopts an integrated design, the battery cover 110 can be the back cover of the electronic device 100, and when the back cover of the electronic device 100 adopts a split design, the battery cover 110 can be a part of the back cover of the electronic device 100. The wireless charging FPC 120 can be arranged between the battery cover 110 and the battery 130, and a buffer foam (not shown in the figure) can be arranged between the wireless charging FPC 120 and the battery cover 110 to prevent the wireless charging FPC 120 from leaving an indentation on the battery cover 110 when the electronic device 100 falls. The wireless charging FPC 120 is further provided with a ferromagnetic shielding member 1201 for shielding the magnetic field generated by the wireless charging FPC 120 . The ferromagnetic shielding member 1201 may be provided between the wireless charging FPC 120 and the battery 130 .

[0042] The wireless charging FPC120 may be a layered structure, for example, it may include a polymer substrate layer, a glue layer, a metal layer, a polymer coating, etc. The metal layer may be disposed between the polymer substrate layer and the polymer coating layer, and fixedly connected to the polymer substrate layer and the polymer coating layer through the glue layer. The metal layer may include a spiral coil and an outlet segment, the spiral coil may be located in the first portion 121 of the wireless charging FPC120 shown in the figure, the first portion 121 may be circular, elliptical or irregular in shape, etc., adapted to the shape of the spiral coil, the spiral coil may be used to generate an induced magnetic field by powering on, and realize the wireless charging function of the electronic device 100. The outlet segment may be located in the second portion 122 of the wireless charging FPC120 shown in the figure, the outlet segment may be connected to the spiral coil, and the end of the outlet segment may extend out of the polymer coating layer. For example, the polymer coating layer may include a through hole (not shown in the figure), and the end of the outlet segment may extend out of the polymer coating layer from the through hole. The portion of the outgoing line segment extending out of the polymer coating layer can be connected to a spring connector (pad), or an electrical connector, for realizing the electrical connection between the wireless charging FPC 120 and the mainboard 140. Accordingly, a spring 141 can be provided at a position close to the wireless charging FPC 120 of the mainboard 140. The number of springs 141 can be the same as the number of electrical connectors, for example, two. The spring 141 can be connected to the electrical connector to realize the electrical connection between the mainboard 140 and the wireless charging FPC 120. The mainboard 140 can also be electrically connected to the battery 130, and the battery 130 can provide power for the mainboard 140.

[0043] In this solution, the distance between the battery cover 110 and the battery 130 is about 0.15mm to 0.17mm, or in other words, the distance between the two surfaces of the battery cover 110 and the battery 130 that are close to each other is about 0.15mm to 0.17mm, and the wireless charging FPC 120 is arranged between the battery 130 and the battery cover 110. The wireless charging FPC 120 includes a ferromagnetic shielding member 1201, which is arranged on the inner side of the wireless charging FPC 120. The material used to prepare the ferromagnetic shielding member is generally a nanocrystalline film, and an iron-based nanocrystalline soft magnetic alloy is commonly used, which includes chemical elements such as iron, silicon, and boron. The operating frequency of a single-layer nanocrystalline film is between 100KHZ-150KHZ, the magnetic permeability of each layer is about 200H / m-2000H / m, and the magnetic loss coefficient is between 0.01-0.02. In order to shield the magnetic field generated by the wireless charging FPC 120, it is necessary to stack single-layer nanocrystalline films. For example, four layers of nanocrystalline films can be glued together with a thickness of about 0.08 mm. Since the ferromagnetic shielding member 1201 is located between the wireless charging FPC 120 and the battery 130, it occupies this part of the space, limiting the increase in battery capacity. Therefore, an embodiment of the present application provides an electronic device to increase the capacity of the battery.

[0044] Figure 2 is a structural exploded diagram of an electronic device provided in an embodiment of the present application, Figure 3 It is a schematic diagram of the cross-sectional structure of the electronic device.

[0045] like Figure 2 or Figure 3 As shown, the first back cover 210, the adhesive component 2101 ( Figure 2 ), wireless charging FPC 220 , ferromagnetic shielding layer 250 , main board 240 and battery 230 .

[0046] The first back cover 210 may be made of non-metallic materials, such as glass, ceramic, fiber, leather or other materials with good insulation properties.

[0047] The adhesive component 2101 can bond the first back cover 210 to the first portion 221 of the wireless charging FPC 120 , so that the wireless charging FPC 220 can be fixed in the electronic device 200 without damaging other electronic components inside the electronic device 200 .

[0048] The wireless charging FPC220 may be a layered structure, for example, it may include a polymer substrate layer, an adhesive layer, a metal layer, a polymer coating, etc. The metal layer may be disposed between the polymer substrate layer and the polymer coating layer, and fixedly connected to the polymer substrate layer and the polymer coating layer through the adhesive layer. The metal layer may include a spiral coil and an outlet segment, and the spiral coil may be located in the first portion 221 of the wireless charging FPC220 shown in the figure, and the first portion 221 may be circular, elliptical or irregular in shape, etc., adapted to the shape of the spiral coil, and the spiral coil may be used to generate an induced magnetic field when powered on, so as to realize the wireless charging function of the electronic device 200.

[0049] The ferromagnetic shielding layer 250 can be attached to the surface of the component between the battery 230 and the wireless charging FPC 220 by chemical vapor deposition (CVD), sputtering or spraying, or can be directly attached to the surface of the battery 230 facing the first rear cover 210.

[0050] The material constituting the ferromagnetic shielding layer 250 may include at least one of iron-silicon alloy particles, iron-nickel alloy particles or ferrite particles. The thickness of the ferromagnetic shielding layer 250 is less than or equal to 0.04 mm, the operating frequency is between 100KHZ-150KHZ, the magnetic permeability is between 1000H / m-8000H / m, and the magnetic loss coefficient is between 0.04-0.08.

[0051] The projection of the ferromagnetic shielding layer 250 in the thickness direction can at least completely cover the projection of the wireless charging FPC 220 in the thickness direction. In other words, the ferromagnetic shielding layer 250 is set corresponding to the wireless charging FPC 220. When the projection of the ferromagnetic shielding layer 250 in the thickness direction can completely cover the projection of the wireless charging FPC 220 in the thickness direction, the magnetic field in the wireless charging FPC 220 can be shielded to ensure that other electronic components in the electronic device 200 work normally.

[0052] In some embodiments, the area of ​​the ferromagnetic shielding layer 250 must at least be able to cover the first part 221 of the wireless charging FPC120, that is, the area of ​​the ferromagnetic shielding layer 250 is at least greater than or equal to the area of ​​the first part 221, so that the effective shielding area of ​​the ferromagnetic shielding layer 250 can at least completely cover the magnetic field generated by the wireless charging FPC220 when it is working, so as to reduce the interference of the magnetic field in the wireless charging FPC220 on other electronic components in the electronic device 200.

[0053] In some embodiments, the area of ​​the ferromagnetic shielding layer 250 may be similar to or equal to the area of ​​the first portion 221 of the wireless charging FPC 220. Figure 2As shown, the ferromagnetic shielding layer 250 and the wireless charging FPC 220 have similar shapes and areas, both of which are elliptical.

[0054] In some embodiments, the area of ​​the ferromagnetic shield 250 may also be close to or equal to the area of ​​the battery 230. The area of ​​the ferromagnetic shielding layer 250 may also be between the area of ​​the first part 221 of the wireless charging FPC 220 and the area of ​​the battery 230. Generally speaking, the larger the area of ​​the ferromagnetic shielding layer 250, the better the shielding effect of the magnetic field. The wireless charging FPC 220 may include an electrical connector, which may be used to electrically connect to the mainboard 240. The electrical connector may be disposed at the end of the second part 222 away from the first part 221. In other words, the electrical connector may be disposed on the side of the wireless charging FPC 220 close to the battery 230. A spring 241 is disposed on the mainboard 240, and the number of springs 241 may be the same as the number of electrical connectors, for example, 2, and the spring 241 may be connected to the electrical connector to achieve electrical connection between the mainboard 240 and the wireless charging FPC 220. The mainboard 240 may also include a board-to-board (BTB) connector to replace the spring 241 to electrically connect to the wireless charging FPC 220. The present application does not limit the electrical connection method between the wireless charging FPC 220 and the mainboard 240. The mainboard 240 may also be electrically connected to the battery 230.

[0055] Based on the above technical solution, a ferromagnetic shielding layer 250 for shielding the magnetic field generated by the wireless charging FPC220 is attached to the surface of the battery 230 facing the wireless charging FPC220, or a ferromagnetic shielding layer 250 for shielding the magnetic field generated by the wireless charging FPC220 is attached to the component between the battery 230 and the wireless charging FPC220, thereby replacing the original ferromagnetic shielding component. The saved structural space can be used to increase the thickness of the battery 230 to increase the capacity of the battery 230, or to reduce the thickness of the electronic device 200 to improve the user experience.

[0056] Figure 4 is a structural exploded diagram of another electronic device provided in an embodiment of the present application, Figure 5 It is a schematic diagram of the cross-sectional structure of the electronic device.

[0057] like Figure 4 As shown, the electronic device 300 is sequentially arranged with a first back cover 310, an adhesive component 3101 ( Figure 4 ), wireless charging FPC 320 , ferromagnetic shielding layer 350 , heat sink 360 , mainboard 340 and battery 330 .

[0058] The first back cover 310 may be made of non-metallic materials, such as glass, ceramic, fiber, leather or other materials with good insulation properties.

[0059] The relevant properties of the wireless charging FPC 320 and the ferromagnetic shielding layer 350 may refer to the description of the wireless charging FPC 220 and the ferromagnetic shielding layer 250 , respectively, and will not be described again here for the sake of brevity.

[0060] The wireless charging FPC 320 includes a first portion 321 and a second portion 322 . The second portion 322 of the wireless charging FPC 320 can be connected to the spring 341 on the mainboard 340 through an electrical connector.

[0061] In some embodiments, the heat sink 360 may be graphite, a liquid cooling film or a vacuum chamber (VC), and the thickness of the heat sink 360 may be greater than or equal to 0.01 mm and less than or equal to 1 mm. Preferably, the thickness of the heat sink 360 may be greater than or equal to 0.05 mm and less than or equal to 0.2 mm. The heat sink 360 may be used to dissipate heat from the battery 330, and may also be used to dissipate heat from other heat generating components in the electronic device 300, thereby improving the safety of the electronic device 300 and the user experience.

[0062] In some embodiments, the ferromagnetic shielding layer 350 may be attached to the upper surface of the heat sink 360, or may be attached to the lower surface of the heat sink 360. Alternatively, the ferromagnetic shielding layer 350 is attached to both the upper surface and the lower surface of the heat sink 360. The upper surface of the heat sink 360 refers to the surface of the heat sink 360 facing the first rear cover 310, and the lower surface of the heat sink 360 refers to the surface of the heat sink 360 facing the battery 330.

[0063] The projection of the ferromagnetic shielding layer 350 in the thickness direction can at least completely cover the projection of the wireless charging FPC 320 in the thickness direction. In other words, the ferromagnetic shielding layer 350 is set corresponding to the wireless charging FPC 320. When the projection of the ferromagnetic shielding layer 350 in the thickness direction can completely cover the projection of the wireless charging FPC 320 in the thickness direction, the magnetic field in the wireless charging FPC 320 can be shielded to ensure that other electronic components in the electronic device 300 work normally.

[0064] Based on the above technical solution, a heat sink 360 for dissipating heat for the battery 330 is arranged between the battery 330 and the wireless charging FPC 320. The ferromagnetic shielding layer 350 is attached to the heat sink 360, which can avoid introducing new parts. On the basis of the existing structure, the magnetic field in the wireless charging FPC 320 is shielded, which saves the structural space inside the electronic device 300, thereby reducing the thickness of the electronic device 300 or increasing the capacity of the battery 330, thereby improving the user experience.

[0065] In some embodiments, the back cover of the electronic device may adopt the above-mentioned integrated design. In this case, the battery cover may directly serve as the back cover of the electronic device.

[0066] In some embodiments, the back cover of the electronic device may also adopt a split design. In this case, the back cover of the electronic device may include a battery cover and a back cover. The battery cover may be provided with a recessed area for accommodating the wireless charging FPC, and the back cover is used to cover the recessed area.

[0067] Figure 6 is a structural exploded diagram of another electronic device provided in an embodiment of the present application, Figure 7 It is a schematic diagram of the cross-sectional structure of the electronic device.

[0068] like Figure 6 As shown, the back cover of the electronic device 400 adopts a split design, and the back cover 410a, the battery cover 410b, the adhesive component 4101 ( Figure 6 ), wireless charging FPC 420, ferromagnetic shielding layer 450, battery 430 and mainboard 440 (not shown in FIG. Figure 6 not shown).

[0069] The relevant properties of the wireless charging FPC 420 and the ferromagnetic shielding layer 450 can refer to the description of the wireless charging FPC 220 and the ferromagnetic shielding layer 250 respectively, and for the sake of brevity, they are not repeated here.

[0070] In this solution, the back cover of the electronic device 400 includes a back cover 410a and a battery cover 410b. The battery cover 410b is provided with a recessed area 410b1, which can be used to accommodate the wireless charging FPC 420. The back cover 410a is used to cover the recessed area 410b1 of the battery cover 410b. The back cover 410a can protect the components arranged in the recessed area 410b1 of the battery cover 410b. The wireless charging FPC 420 is provided between the back cover 410a and the recessed area 410b1 of the battery cover 410b. The first part 421 of the wireless charging FPC 420 can be bonded and fixed to the back cover 410a by an adhesive component 4101, or can be bonded and fixed to the battery cover 410b by an adhesive component 4101.

[0071] The back cover 410a may be made of non-metallic materials, such as glass, ceramics, fiber or leather, etc., which have good insulation properties, so that the wireless charging FPC 420 can receive electromagnetic waves and achieve the purpose of wireless charging.

[0072] It should be understood that when the back cover of the electronic device 400 adopts a split design, the constituent material of the battery cover 410b can be a metal material.

[0073] The ferromagnetic shielding layer 450 can be attached to the surface of the battery cover 410b facing the wireless charging FPC420, or it can be attached to the surface of the battery cover 410b facing the battery 430. Generally speaking, the closer the ferromagnetic shielding layer 450 is to the wireless charging FPC420, the better the effect of shielding the magnetic field.

[0074] The projection of the ferromagnetic shielding layer 450 in the thickness direction can at least completely cover the projection of the wireless charging FPC 420 in the thickness direction. In other words, the ferromagnetic shielding layer 450 is set corresponding to the wireless charging FPC 420. When the projection of the ferromagnetic shielding layer 450 in the thickness direction can completely cover the projection of the wireless charging FPC 420 in the thickness direction, the magnetic field in the wireless charging FPC 420 can be shielded to ensure that other electronic components in the electronic device 400 work normally.

[0075] In some embodiments, the battery cover 410b may be provided with a through hole so that the second portion 422 of the wireless charging FPC 420 can pass through the through hole. The first portion 421 of the wireless charging FPC 420 is provided between the back cover 410a and the battery cover 410b, and the second portion 422 of the wireless charging FPC 420 passes through the through hole reserved in the battery cover 410b and extends inward, and is electrically connected to the spring 441 on the main board 440 inside the battery cover 410b through the electrical connector.

[0076] In some embodiments, a heat sink may also be provided between the battery 430 and the battery cover 410b. In this case, the ferromagnetic shielding layer 450 may also be attached to the upper surface of the heat sink, or to the lower surface of the heat sink. Alternatively, the ferromagnetic shielding layer 450 is attached to both the upper and lower surfaces of the heat sink. The upper surface of the heat sink refers to the surface of the heat sink 460 facing the battery cover 410b, and the lower surface of the heat sink refers to the surface of the heat sink facing the battery 430.

[0077] Based on the above technical solution, the back cover of the electronic device 400 adopts a split design, the wireless charging FPC420 is arranged between the battery cover 410b and the back cover 410a, and the ferromagnetic shielding layer 450 can be attached to the surface of the battery cover 410b facing the wireless charging FPC420, thereby saving the structural space inside the electronic device 400, thereby reducing the thickness of the electronic device 400 or increasing the capacity of the battery 430, thereby improving the user experience.

[0078] Figure 8 is a structural exploded diagram of another electronic device provided in an embodiment of the present application, Fig. 9 is a schematic diagram of the cross-sectional structure of the electronic device. Fig.10 It is a top view of the back cover of the electronic device.

[0079] like Figure 8As shown, the second rear cover 510 is arranged in sequence from the outside to the inside of the electronic device 500, and the wireless charging FPC 520 ( Figure 8 ), ferromagnetic shielding layer 550 , main board 540 and battery 530 .

[0080] The relevant properties of the wireless charging FPC 520 and the ferromagnetic shielding layer 550 may refer to the description of the wireless charging FPC 220 and the ferromagnetic shielding layer 250 , respectively, and will not be described again here for the sake of brevity.

[0081] The second back cover 510 may be made of non-metallic materials, such as glass, ceramic, fiber, leather or other materials with good insulation properties.

[0082] Combination Figure 8 , further reference Fig. 9 and Fig.10 The first part 521 of the wireless charging FPC 520 is embedded in the second rear cover 510, and the second part 522 extends out of the second rear cover 510 and is connected to the main board 540 through an electrical connector. The ferromagnetic shielding layer 550 can be attached to the surface of the second rear cover 510 facing the battery 530, or to the outer packaging surface of the battery 530 facing the second rear cover 510.

[0083] refer to Fig. 9 and Fig.10 , the wireless charging FPC 520 is partially embedded in the second rear cover 510, which means that the first part 521 of the wireless charging FPC is embedded in the middle of the second rear cover 510, so that the first part 521 of the wireless charging FPC 520 cannot be directly observed from the inner surface and the outer surface of the second rear cover 510, and the second part 522 of the wireless charging FPC 520 extends from the inner surface of the second rear cover 510. The second part 522 of the wireless charging FPC 520 may have an electrical connector 5201, which can be electrically connected to the spring 541 of the main board 540. The main board 540 may also include a board to board (BTB) connector to replace the spring 541 to electrically connect to the wireless charging FPC 520. The present application does not limit the electrical connection method between the wireless charging FPC 520 and the main board 540.

[0084] The projection of the ferromagnetic shielding layer 550 in the thickness direction can at least completely cover the projection of the wireless charging FPC 520 in the thickness direction. In other words, the ferromagnetic shielding layer 550 is set corresponding to the wireless charging FPC 520. When the projection of the ferromagnetic shielding layer 550 in the thickness direction can completely cover the projection of the wireless charging FPC 520 in the thickness direction, the magnetic field in the wireless charging FPC 520 can be shielded to ensure that other electronic components in the electronic device 500 work normally.

[0085] In some embodiments, a heat sink may be provided between the second back cover 510 and the battery 530. In this case, the ferromagnetic shielding layer 550 may also be attached to the upper surface of the heat sink, or to the lower surface of the heat sink. Alternatively, the ferromagnetic shielding layer 550 is attached to both the upper and lower surfaces of the heat sink. The upper surface of the heat sink refers to the surface of the heat sink facing the second back cover 510, and the lower surface of the heat sink refers to the surface of the heat sink facing the battery 530.

[0086] Based on the above technical solution, a wireless charging FPC520 is embedded in the second back cover 510 of the electronic device 500, and the ferromagnetic shielding layer 550 is attached to the surface of the second back cover 510 facing the wireless charging FPC520, thereby reducing the structural space occupied by the wireless charging FPC520 in the electronic device 500 and replacing the original ferromagnetic shielding component, thereby saving the structural space inside the electronic device 500, and can reduce the thickness of the electronic device 500 or increase the capacity of the battery 530, thereby improving the user experience.

[0087] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electronic device, characterized in that: include: Battery; Wireless charging coil; A ferromagnetic shielding layer, wherein the ferromagnetic shielding layer is attached to the surface of the battery facing the wireless charging coil, or to the surface of a component between the battery and the wireless charging coil, and the thickness of the ferromagnetic shielding layer is less than or equal to 0.04 mm; the ferromagnetic shielding layer is used to shield the magnetic field generated by the wireless charging coil.

2. The electronic device according to claim 1, characterized in that: The projection of the ferromagnetic shielding layer in the thickness direction at least covers the projection of the wireless charging coil in the thickness direction.

3. The electronic device according to claim 1 or 2, characterized in that: The ferromagnetic shielding layer is formed by chemical vapor deposition (CVD) or spraying.

4. The electronic device according to claim 1, characterized in that: The component between the battery and the wireless charging coil includes a heat sink, and the ferromagnetic shielding layer is attached to a surface of the heat sink facing the wireless charging coil.

5. The electronic device according to claim 4, characterized in that: The heat sink includes any one of graphite, a liquid cooling film or a vacuum chamber heat sink VC.

6. The electronic device according to claim 4, characterized in that: The electronic device further includes a first back cover, which is located on a side of the wireless charging coil away from the battery, and the first back cover and the wireless charging coil are connected via an adhesive component.

7. The electronic device according to claim 1, characterized in that: The electronic device also includes a first back cover, which is located on a side of the wireless charging coil away from the battery. The first back cover and the wireless charging coil are connected by an adhesive component, and the ferromagnetic shielding layer is attached to a surface of the battery facing the wireless charging coil.

8. The electronic device according to claim 1, characterized in that: The electronic device also includes a battery cover and a back cover, the battery cover is located between the wireless charging coil and the battery, the battery cover includes a recessed area, the recessed area is used to accommodate the wireless charging coil, the back cover is used to cover the recessed area, and the ferromagnetic shielding layer is attached to the surface of the recessed area facing the wireless charging coil.

9. The electronic device according to claim 1, characterized in that: The electronic device further includes a second back cover, the wireless charging coil is embedded in the second back cover, and the ferromagnetic shielding layer is attached to a surface of the second back cover facing the wireless charging coil.

10. The electronic device according to claim 1 or 2, characterized in that: The ferromagnetic shielding layer is made of at least one of an iron-silicon alloy, an iron-nickel alloy or a ferrite.

11. The electronic device according to claim 1 or 2, characterized in that: The operating frequency of the ferromagnetic shielding layer is greater than or equal to 100 Khz and less than or equal to 150 KHz, and the magnetic permeability is greater than or equal to 1000 H / m and less than or equal to 8000 H / m.

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