Wireless charging coil, wireless charging module and electronic equipment

Abstract

The invention discloses a wireless charging coil, a wireless charging module and electronic equipment. The wireless charging coil comprises: a hollow area; the coil structure is arranged around the hollow area; the coil structure is provided with a first coil part and a second coil part, and the hollow area is located between the first coil part and the second coil part in the first direction; each of the first coil part and the second coil part comprises a plurality of wiring groups, and the plurality of wiring groups are arranged along a first direction; in the first direction, the width of the first coil part is smaller than that of the second coil part, and the widths of the plurality of wiring groups of the second coil part are gradually reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic devices, and specifically relates to a wireless charging coil, a wireless charging module and an electronic device. Background Art

[0002] like Figure 1 and Figure 2 As shown, with the increasing demand for images of electronic devices, the camera modules of electronic devices are designed to be larger and larger, occupying the installation area of ​​the wireless charging module 30 ′.

[0003] In the related art, the wireless charging module 30' includes a wireless charging coil 10', and the wireless charging coil 10' includes a hollow area 100' and a multi-turn wiring. The multi-turn wiring is arranged around the hollow area 100', and the multi-turn wiring is a ring structure of equal width, and the wire diameter of the multi-turn wiring is equal. When the electronic device using the wireless charging module 30' is placed on the charging seat, the distance between the center of the wireless charging coil 10' and the center of the coil 80' of the charging seat is large. As a result, the hollow part 800' of the coil 80' of the charging seat is blocked by the wireless charging module 30' of the electronic device in a large area. At the same time, the hollow area 100' of the wireless charging coil 10' of the electronic device is blocked by the coil 80' of the charging seat in a large area. This results in low charging efficiency and long charging time for the electronic device. Summary of the invention

[0004] The present application aims to provide a wireless charging coil, a wireless charging module and an electronic device, which solves one of the problems in the related art that due to the unreasonable structural setting of the wireless charging module, the distance between the center of the wireless charging coil and the center of the coil of the charging base is large, which affects the charging efficiency of the electronic device and increases the charging time.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application proposes a wireless charging coil, comprising: a hollow area; a coil structure, wherein the coil structure is arranged around the hollow area; the coil structure has a first coil portion and a second coil portion, and along a first direction, the hollow area is located between the first coil portion and the second coil portion; the first coil portion and the second coil portion each include a plurality of wiring groups, and the plurality of wiring groups are arranged along the first direction; along the first direction, the width of the first coil portion is smaller than the width of the second coil portion, and the widths of the plurality of wiring groups of the second coil portion gradually decrease.

[0007] In a second aspect, an embodiment of the present application proposes a wireless charging module, including: a wireless charging coil as in the first aspect.

[0008] In a third aspect, an embodiment of the present application proposes an electronic device, comprising: a camera module; and a wireless charging module as in the second aspect, wherein the first coil portion is located between the second coil portion and the camera module.

[0009] In an embodiment of the present application, the wireless charging coil includes a hollow area and a coil structure. The coil structure is arranged around the hollow area.

[0010] The coil structure is divided into regions so that the coil structure has a first coil portion and a second coil portion. Along the first direction, the hollow area is located between the first coil portion and the second coil portion. That is, the first coil portion and the second coil portion are arranged opposite to each other and spaced apart in the first direction.

[0011] The size and structure of the first coil portion and the second coil portion are defined. Along the first direction, the width of the first coil portion is smaller than the width of the second coil portion. The first coil portion includes a plurality of routing groups, and the second coil portion includes a plurality of routing groups. The plurality of routing groups of the first coil portion are arranged along the first direction, and the plurality of routing groups of the second coil portion are arranged along the first direction. Wherein, along the first direction, the width of the plurality of routing groups of the second coil portion gradually decreases.

[0012] This setting optimizes the routing of the coil structure, adjusts the size of the inner circle of the coil structure, and adjusts the distribution of the magnetic field strength of the wireless charging coil. Based on the fact that the maximum size of the coil structure in the first direction and the second direction of the present application is the same as the size of the coil in the related art, the present application adjusts the distribution position of the hollow area in the first direction, the routing design of the first coil part of the wireless charging coil is more dense, the magnetic field at the second coil part is more concentrated in the inner circle of the coil structure, and the magnetic field at the first coil part is more concentrated in the middle area of ​​the first coil part in the first direction. In this way, compared with the wireless charging coil in the related art, the present application increases the equivalent height of the wireless charging coil in the first direction (that is, along the first direction, the height from the center of the wireless charging coil to the bottom of the electronic device is increased). In this way, after the electronic device is placed on the charging seat, the distance from the center of the coil of the charging seat to the center of the wireless charging coil can be reduced along the first direction, the area of ​​the hollow area of ​​the coil of the charging seat that is blocked by the coil structure of the wireless charging coil can be reduced, and the area of ​​the hollow area of ​​the wireless charging coil that is blocked by the coil of the charging seat can be reduced, which is conducive to improving the wireless charging efficiency of the electronic device and shortening the wireless charging time of the electronic device.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 It is a schematic diagram of the structure of the coil of the charging base and the wireless charging coil in the related art;

[0016] Figure 2 It is a structural schematic diagram of a wireless charging module in the related art;

[0017] Figure 3 It is a schematic diagram of the structure of a shielding layer and a flexible circuit board in the related art;

[0018] Figure 4 is a schematic diagram of the magnetic field intensity distribution of a wireless charging coil in the related art;

[0019] Figure 5 is a schematic diagram of the structure of a wireless charging coil and a flexible circuit board according to an embodiment of the present application;

[0020] Figure 6 is a schematic diagram of the structure of a coil of a charging base and a wireless charging coil in one embodiment of the present application;

[0021] Figure 7 is an exploded view of a wireless charging module according to an embodiment of the present application;

[0022] Figure 8 is a structural schematic diagram of a wireless charging module according to an embodiment of the present application;

[0023] Fig. 9 is a schematic diagram of magnetic field intensity distribution of a wireless charging coil according to an embodiment of the present application;

[0024] Fig.10 is a curve diagram showing how the coupling value k of the transceiver coil of the present application and related technologies changes with the offset distance in the first direction;

[0025] Fig.11 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0026] Reference numerals:

[0027] Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0028] 10' wireless charging coil, 100' hollow area, 240' base copper, 250' copper plating, 30' wireless charging module, 300' covering layer, 400' shielding layer, 500' flexible circuit board, 600' protective layer, 700' supporting layer, 80' charging base coil, 800' hollow part.

[0029] Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.11 The corresponding relationship between the reference numerals and component names in the figure is:

[0030] 10 wireless charging coil, 100 hollow area, 200 coil structure, 210 first coil part, 220 second coil part, 230 routing, 240 base copper, 250 copper plating, 232 coil, 260 third coil part, 270 routing group, 30 wireless charging module, 300 covering layer, 400 shielding layer, 410 hollow area, 500 flexible circuit board, 600 protective layer, 700 supporting layer, 80 coil of charging base, 800 hollow part, 90 electronic device, 900 camera module. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0032] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The following is combined with Figures 5 to 11 The wireless charging coil 10, the wireless charging module 30 and the electronic device provided in the embodiments of the present application are described.

[0036] like Figure 5 As shown, according to some embodiments of the present application, a wireless charging coil 10 is proposed, including: a hollow area 100; a coil structure 200, the coil structure 200 is arranged around the hollow area 100; the coil structure 200 has a first coil portion 210 and a second coil portion 220, along the first direction, the hollow area 100 is located between the first coil portion 210 and the second coil portion 220; the first coil portion 210 and the second coil portion 220 both include a plurality of wiring groups 270, and the plurality of wiring groups 270 are arranged along the first direction; along the first direction, the width of the first coil portion 210 is smaller than the width of the second coil portion 220, and the widths of the plurality of wiring groups 270 of the second coil portion 220 gradually decrease.

[0037] In the embodiment of the present application, the wireless charging coil 10 includes a hollow area 100 and a coil structure 200 . The coil structure 200 is disposed around the hollow area 100 .

[0038] The coil structure 200 is divided into regions such that the coil structure 200 has a first coil portion 210 and a second coil portion 220. Along the first direction, the hollow area 100 is located between the first coil portion 210 and the second coil portion 220. That is, the first coil portion 210 and the second coil portion 220 are arranged opposite and spaced apart in the first direction.

[0039] The size and structure of the first coil portion 210 and the second coil portion 220 are defined. Along the first direction, the width of the first coil portion 210 is smaller than the width of the second coil portion 220. The first coil portion 210 includes a plurality of routing groups 270, and the second coil portion 220 includes a plurality of routing groups 270. The plurality of routing groups 270 of the first coil portion 210 are arranged along the first direction, and the plurality of routing groups 270 of the second coil portion 220 are arranged along the first direction. Among them, along the first direction, the width of the plurality of routing groups 270 of the second coil portion 220 gradually decreases.

[0040] This setting optimizes the routing 230 of the coil structure 200, adjusts the size of the inner circle of the coil structure 200, and adjusts the distribution of the magnetic field strength of the wireless charging coil 10. Based on the fact that the maximum size of the coil structure 200 in the first direction and the second direction is the same as the size of the coil in the related art, the present application adjusts the distribution position of the hollow area 100 in the first direction, and the routing 230 of the first coil part 210 of the wireless charging coil 10 is designed to be more dense, the magnetic field at the second coil part 220 is more concentrated in the inner circle of the coil structure 200, and the magnetic field at the first coil part 210 is more concentrated in the middle area of ​​the first coil part 210 in the first direction. In this way, compared with the wireless charging coil 10' in the related art, the present application increases the equivalent height of the wireless charging coil 10 in the first direction (that is, along the first direction, the height from the center of the wireless charging coil 10 to the bottom of the electronic device is increased). In this way, after the electronic device is placed on the charging base, the distance from the center of the coil 80 of the charging base to the center of the wireless charging coil 10 can be reduced along the first direction, and the area of ​​the hollow area 100 of the coil 80 of the charging base that is blocked by the coil structure 200 of the wireless charging coil 10 can be reduced. The area of ​​the hollow area 100 of the wireless charging coil 10 that is blocked by the coil 80 of the charging base can be reduced, which is beneficial to improving the wireless charging efficiency of the electronic device and shortening the wireless charging time of the electronic device.

[0041] Exemplarily, the length of the hollow area 100 in the first direction is greater than the length of the hollow area 100 in the second direction.

[0042] Exemplarily, the first direction is perpendicular to the second direction.

[0043] Exemplarily, the included angle between the orthographic projections of the first direction and the second direction on the preset plane is an acute angle.

[0044] Exemplarily, the included angle between the orthographic projections of the first direction and the second direction on the preset plane is an obtuse angle.

[0045] Exemplarily, a plurality of routing groups 270 are connected in series.

[0046] like Figure 5 As shown, along the first direction, the maximum length of the outer loop of the coil structure 200 in the first direction is d. The width of the first coil portion 210 is t5. Along the first direction, the width of the second coil portion 220 is t6.

[0047] In some embodiments, each routing group 270 includes at least one routing wire 230, and each routing wire 230 includes at least one turn of coil 232; when the routing group 270 includes multiple routing wires 230, the multiple routing wires 230 are arranged along a first direction; when the routing wire 230 includes multiple turns of coil 232, the multiple turns of coil 232 are arranged along the first direction.

[0048] In this embodiment, the structure of the routing group 270 is further defined.

[0049] Specifically, each wiring group 270 includes at least one wiring 230 .

[0050] Specifically, each trace 230 includes at least one turn of coil 232 .

[0051] When the wiring group 270 includes multiple wiring strands 230 , the multiple wiring strands 230 are arranged along the first direction.

[0052] When the trace 230 includes a plurality of turns of coils 232 , the plurality of turns of coils 232 are arranged along the first direction.

[0053] Exemplarily, the multiple turns of coils 232 of the trace 230 are connected in parallel.

[0054] Exemplarily, when each wiring group 270 includes one strand of wiring 230 , and each strand of wiring 230 includes one turn of coil 232 , the width of the coil 232 of the strands of wiring 230 gradually decreases along the first direction.

[0055] In some embodiments, in the second coil portion 220 , when the number of traces 230 in two adjacent trace groups 270 is the same, the width of the traces 230 in the outer trace group 270 is greater than the width of the traces 230 in the inner trace group 270 .

[0056] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0057] In the second coil portion 220 , when the number of traces 230 in two adjacent trace groups 270 is the same, the width of the traces 230 in the outer trace group 270 is greater than the width of the traces 230 in the inner trace group 270 .

[0058] This arrangement can meet the requirement of gradually reducing the width of the plurality of wiring groups 270 of the second coil portion 220 along the first direction.

[0059] Exemplarily, in the second coil portion 220 , two adjacent wiring groups 270 each include three wiring strands, and along the first direction, the width of the wiring 230 of the wiring group 270 located on the outside is greater than the width of the wiring 230 of the wiring group 270 located on the inside.

[0060] Exemplarily, in the second coil portion 220 , two adjacent wiring groups 270 each include two wiring strands, and along the first direction, the width of the wiring 230 of the wiring group 270 located on the outside is greater than the width of the wiring 230 of the wiring group 270 located on the inside.

[0061] In some embodiments, in two adjacent wiring groups 270 of the second coil portion 220 , the number of wirings 230 in the wiring group 270 located on the outer side is greater than the number of wirings 230 in the wiring group 270 located on the inner side.

[0062] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0063] In two adjacent wiring groups 270 of the second coil portion 220 , the number of wirings 230 in the wiring group 270 located on the outer side is greater than the number of wirings 230 in the wiring group 270 located on the inner side.

[0064] This arrangement can meet the use requirement that the width of the plurality of wiring groups 270 of the second coil portion 220 gradually decreases along the first direction.

[0065] Exemplarily, of the two adjacent wiring groups 270 of the second coil part 220, the wiring group 270 located on the outside is recorded as the first wiring group, and the wiring group 270 located on the inside is recorded as the second wiring group. The first wiring group includes three wiring strands, and the second wiring group includes two wiring strands.

[0066] Exemplarily, of the two adjacent wiring groups 270 of the second coil part 220, the wiring group 270 located on the outside is recorded as the first wiring group, and the wiring group 270 located on the inside is recorded as the second wiring group. The first wiring group includes four wiring strands, and the second wiring group includes three wiring strands.

[0067] In some embodiments, the width of the traces 230 of the trace group 270 located on the outside is greater than the width of the traces 230 of the trace group 270 located on the inside.

[0068] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0069] In two adjacent routing groups 270 of the second coil part 220, the number of routing lines 230 of the routing group 270 located on the outside is greater than the number of routing lines 230 of the routing group 270 located on the inside. The width of the routing lines 230 of the routing group 270 located on the outside is greater than the width of the routing lines 230 of the routing group 270 located on the inside.

[0070] This arrangement can meet the use requirement that the width of the plurality of wiring groups 270 of the second coil portion 220 gradually decreases along the first direction.

[0071] In some embodiments, in the second coil portion 220, when each routing group 270 includes a routing wire 230, the number of coils 232 of two adjacent routing wires is the same, and the width of the coil 232 of the routing wire 230 located on the outside is greater than the width of the coil 232 of the routing wire 230 located on the inside.

[0072] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0073] When each wiring group 270 includes a wiring 230 , the numbers of coils 232 of two adjacent wirings are the same, and the width of the coil 232 of the wiring 230 located on the outside is greater than the width of the coil 232 of the wiring 230 located on the inside.

[0074] This arrangement can meet the requirement of gradually reducing the width of the plurality of wiring groups 270 of the second coil portion 220 along the first direction.

[0075] Exemplarily, in the second coil portion 220 , two adjacent wires each include a turn of coil 232 , and along the first direction, the width of the coil 232 of the wire 230 located on the outside is greater than the width of the coil 232 of the wire 230 located on the inside.

[0076] Exemplarily, in the second coil portion 220, two adjacent wires each include three turns of coils, the outer wire 230 is recorded as the first wire, and the inner wire 230 is recorded as the second wire. Along the first direction, the width of the three turns of coils of the first wire is equal, and the width of the three turns of coils of the second wire is equal. Along the first direction, the width of the coil 232 of the first wire is greater than the width of the coil 232 of the second wire.

[0077] In some embodiments, in the second coil portion 220 , when each routing group 270 includes a routing wire 230 , the number of coils 232 of the routing wire 230 located on the outside of two adjacent routing wires is greater than the number of coils 232 of the routing wire 230 located on the inside.

[0078] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0079] In the second coil portion 220 , when each wiring group 270 includes one wiring 230 , the number of coils 232 of the wiring 230 located on the outer side of two adjacent wirings is greater than the number of coils 232 of the wiring 230 located on the inner side.

[0080] This arrangement can meet the requirement of gradually reducing the width of the plurality of wiring groups 270 of the second coil portion 220 along the first direction.

[0081] Exemplarily, of the two adjacent wires of the second coil portion 220, the outer wire 230 is recorded as the first wire, and the inner wire 230 is recorded as the second wire. The first wire includes three turns of coil, and the second wire includes two turns of coil.

[0082] Exemplarily, of the two adjacent wires of the second coil portion 220, the outer wire 230 is recorded as the first wire, and the inner wire 230 is recorded as the second wire. The first wire includes four turns of coil 232, and the second wire includes three turns of coil.

[0083] In some embodiments, the width of the coil 232 of the trace 230 located on the outside is equal to the width of the coil 232 of the trace 230 located on the inside.

[0084] In this embodiment, a matching structure of a plurality of wiring groups 270 of the second coil portion 220 is defined.

[0085] In the second coil part 220, when each wiring group 270 includes a wiring 230, the number of coils 232 of the wiring 230 located on the outside of two adjacent wirings is greater than the number of coils 232 of the wiring 230 located on the inside. The width of the coil 232 of the wiring 230 located on the outside is equal to the width of the coil 232 of the wiring 230 located on the inside.

[0086] That is, by increasing the number of coils 232 of the wiring 230 located on the outside, the requirement of gradually reducing the width of the plurality of wiring groups 270 of the second coil portion 220 along the first direction is met.

[0087] In some other embodiments, in the second coil portion 220, when each wiring group 270 includes a wiring 230, the number of coils 232 of the wiring 230 located on the outside of two adjacent wirings is greater than the number of coils 232 of the wiring 230 located on the inside. The width of the coil 232 of the wiring 230 located on the outside is greater than the width of the coil 232 of the wiring 230 located on the inside.

[0088] In some other embodiments, in the second coil part 220, when each wiring group 270 includes a wiring 230, the number of coils 232 of the wiring 230 located on the outside of two adjacent wirings is greater than the number of coils 232 of the wiring 230 located on the inside. The width of the coil 232 of the wiring 230 located on the outside is smaller than the width of the coil 232 of the wiring 230 located on the inside. In other words, even if the width of the coil 232 of the wiring 230 located on the outside is smaller than the width of the coil 232 of the wiring 230 located on the inside, the total width of the coil 232 of the wiring 230 located on the outside along the first direction is greater than the total width of the coil 232 of the wiring 230 located on the inside.

[0089] In some embodiments, along the first direction, the widths of the plurality of wiring groups 270 of the first coil portion 210 are equal.

[0090] In this embodiment, a matching structure of a plurality of wiring groups 270 of the first coil portion 210 is defined.

[0091] Along the first direction, in the first coil portion 210, the widths of any two of the plurality of wiring groups 270 are equal. This arrangement can simplify the processing difficulty of the first coil portion 210 while satisfying the use requirement that the width of the first coil portion 210 is smaller than the width of the second coil portion 220 along the first direction, which is beneficial to improving the processing efficiency of the wireless charging coil 10.

[0092] Exemplarily, in the first coil portion 210 , each wiring group 270 includes a wiring strand 230 .

[0093] Exemplarily, of two adjacent routing groups 270 of the first coil portion 210, the routing group 270 located outside is recorded as the first routing group, and the routing group 270 located inside is recorded as the second routing group. The number of routing lines 230 in the first routing group is equal to the number of routing lines 230 in the second routing group.

[0094] Exemplarily, of the two adjacent routing groups 270 of the first coil portion 210, the routing group 270 located on the outside is recorded as the first routing group, and the routing group 270 located on the inside is recorded as the second routing group. The number of routing lines 230 of the first routing group is not equal to the number of routing lines 230 of the second routing group, and the width of the routing lines 230 of the first routing group is not equal to the width of the routing lines 230 of the second routing group, so as to ensure that the widths of the multiple routing groups 270 of the first coil portion 210 are equal.

[0095] In some embodiments, the maximum length of the outer loop of the coil structure 200 in the first direction is d; the portion of the coil structure 200 located between the first coil portion 210 and the second coil portion 220 includes two third coil portions 260; along the second direction, the hollow area 100 is located between the two third coil portions 260; along the first direction, the height of the position where the end surface of the third coil portion 260 is away from the first coil portion 210 is d / 2; along the first direction, the spacing between the two third coil portions 260 gradually decreases; or along the first direction, the spacing between the two third coil portions 260 first decreases and then becomes equal; or along the first direction, the spacing between the two third coil portions 260 is equal.

[0096] In this embodiment, the coil structure 200 further has two third coil portions 260 , each of which is located between the first coil portion 210 and the second coil portion 220 .

[0097] Along the second direction, the hollow area 100 is located between the two third coil parts 260. That is, along the second direction, the two third coil parts 260 are arranged opposite to each other and spaced apart.

[0098] The maximum length of the outer loop of the coil structure 200 in the first direction is d. Along the first direction, the height of the position where the end surface of the third coil portion 260 is away from the first coil portion 210 is d / 2.

[0099] Along the first direction, the distance between the two third coil parts 260 gradually decreases. Alternatively, along the first direction, the distance between the two third coil parts 260 first decreases and then becomes equal. Alternatively, along the first direction, the distance between the two third coil parts 260 is equal.

[0100] This setting further limits the shape of the hollow area 100, so that even if the camera module of the electronic device occupies the position of the wireless charging coil 10 along the first direction, the shape of the hollow area 100 of the wireless charging coil 10 can still be adapted to the shape of the hollow part 800 of the charging stand. In this way, the area covered by the hollow area 100 of the wireless charging coil 10 and the area covered by the hollow part 800 of the charging stand can be further reduced, which is conducive to improving the wireless charging efficiency of the electronic device.

[0101] like Figure 5 As shown, the distance between the end faces of the two third coil parts 260 facing away from the first coil part 210 is t1. Along the first direction, the distance between the parts of the two third coil parts 260 whose height is greater than d / 2 is t2. Among them, 0.8≤t2 / t1≤1. Exemplarily, t2 / t1=0.85, t2 / t1=0.88, t2 / t1=0.9, t2 / t1=0.92, t2 / t1=0.95 and t2 / t1=0.97, etc., are not listed here one by one.

[0102] like Figure 7 and Figure 8 As shown, according to some other embodiments of the present application, the wireless charging module 30 includes: a wireless charging coil 10 as in any of the above embodiments.

[0103] The wireless charging module 30 provided in the present application includes the wireless charging coil 10 of any of the above embodiments, and therefore has all the beneficial effects of the above wireless charging coil 10, which will not be described one by one here.

[0104] In some embodiments, Figure 7 and Figure 8 As shown, the wireless charging module 30 also includes: a covering layer 300; a supporting layer 700, wherein the wireless charging coil 10 is located between the covering layer 300 and the supporting layer 700; a shielding layer 400, which is arranged on the side of the supporting layer 700 away from the covering layer 300, and the shielding layer 400 is provided with a hollow area 410; a flexible circuit board 500, wherein a part of the flexible circuit board 500 is arranged in the hollow area 410; and a protective layer 600, which is arranged on the side of the shielding layer 400 away from the supporting layer 700.

[0105] In this embodiment, the wireless charging module 30 further includes a covering layer 300 , a supporting layer 700 , a shielding layer 400 , a flexible circuit board 500 and a protective layer 600 .

[0106] The cover layer 300 , the wireless charging coil 10 , the support layer 700 , the shielding layer 400 and the protection layer 600 are stacked in sequence.

[0107] The shielding layer 400 is provided with a hollow area 410 , and a portion of the flexible circuit board 500 is provided in the hollow area 410 . That is, a portion of the flexible circuit board 500 is embedded in the hollow area 410 .

[0108] In related technologies, such as Figure 2 As shown, the wireless charging module 30' includes two wireless charging coils 10', two covering layers 300', two supporting layers 700', a shielding layer 400' and a protective layer 600'. Compared with the wireless charging module 30' of the related art, the present application changes the double-layer wireless charging coil into a single-layer wireless charging coil, and cancels a covering layer 300 and a supporting layer 700, thereby reducing the material input of the wireless charging module 30 and thinning the thickness of the wireless charging module 30. In other words, the present application improves the structure of the wireless charging module 30. Compared with the wireless charging module of the related art, under the condition of the same module thickness, a thicker routing 230 design can be used to achieve a lower impedance, so that the wireless charging module 30 has better performance. In other words, the present application improves the structure of the wireless charging module 30. Compared with the wireless charging module 30' of the related art, under the condition of the same performance requirements, the thickness of the wireless charging module 30 can be thinned.

[0109] like Fig.11 As shown, according to some further embodiments of the present application, the electronic device 90 includes: a camera module 900; and the wireless charging module 30 of any of the above embodiments, wherein the first coil portion 210 is located between the second coil portion 220 and the camera module 900.

[0110] In related technologies, such as Figure 1 As shown, the electronic device includes a wireless charging module 30', and the wireless charging module 30' includes a wireless charging coil 10'. The electronic device is placed on a charging base, and the coil 80' of the charging base cooperates with the wireless charging coil 10' of the electronic device to wirelessly charge the electronic device.

[0111] As the demand for images of electronic devices increases, the camera modules of electronic devices are designed to be larger and larger, squeezing out the installation area of ​​the wireless charging module 30', resulting in the distance from the center of the wireless charging coil 10' to the bottom of the electronic device along the Y direction becoming smaller and smaller. Along the Y direction, the distance between the center of the coil 80' of the charging stand and the center of the wireless charging coil 10' of the electronic device increases accordingly. When the electronic device is wirelessly charged, the hollow portion 800' of the coil 80' of the charging stand is blocked by a large area of ​​the coil structure of the electronic device. At the same time, the hollow area 100' of the wireless charging coil 10' of the electronic device is blocked by a large area of ​​the coil 80' of the charging stand, resulting in low charging efficiency and long charging time for the electronic device.

[0112] In the present application, the electronic device 90 includes a camera module 900 and a wireless charging module 30, and the first coil portion 210 is located between the second coil portion 220 and the camera module 900. That is, the first coil portion 210 is closer to the camera module 900 than the second coil portion 220.

[0113] The wireless charging module 30 includes a wireless charging coil 10. The wireless charging coil 10 includes a hollow area 100 and a coil structure 200. The coil structure 200 is arranged around the hollow area 100.

[0114] The coil structure 200 is divided into regions such that the coil structure 200 has a first coil portion 210 and a second coil portion 220. Along the first direction, the hollow area 100 is located between the first coil portion 210 and the second coil portion 220. That is, the first coil portion 210 and the second coil portion 220 are arranged opposite and spaced apart in the first direction.

[0115] The size and structure of the first coil portion 210 and the second coil portion 220 are defined. Along the first direction, the width of the first coil portion 210 is smaller than the width of the second coil portion 220. The first coil portion 210 includes a plurality of routing groups 270, and the second coil portion 220 includes a plurality of routing groups 270. The plurality of routing groups 270 of the first coil portion 210 are arranged along the first direction, and the plurality of routing groups 270 of the second coil portion 220 are arranged along the first direction. Among them, along the first direction, the width of the plurality of routing groups 270 of the second coil portion 220 gradually decreases.

[0116] This setting optimizes the routing 230 of the coil structure 200, adjusts the size of the inner circle of the coil structure 200, and adjusts the distribution of the magnetic field strength of the wireless charging coil 10. Based on the fact that the maximum size of the coil structure 200 in the first direction and the second direction is the same as the size of the coil in the related art, the present application adjusts the distribution position of the hollow area 100 in the first direction, and the routing 230 of the first coil part 210 of the wireless charging coil 10 is designed to be more dense, the magnetic field at the second coil part 220 is more concentrated in the inner circle of the coil structure 200, and the magnetic field at the first coil part 210 is more concentrated in the middle area of ​​the first coil part 210 in the first direction. In this way, compared with the wireless charging coil 10' in the related art, the present application increases the equivalent height of the wireless charging coil 10 in the first direction (that is, along the first direction, the height from the center of the wireless charging coil 10 to the bottom of the electronic device is increased). In this way, after the electronic device is placed on the charging base, the distance from the center of the coil 80 of the charging base to the center of the wireless charging coil 10 can be reduced along the first direction, and the area of ​​the hollow area 100 of the coil 80 of the charging base that is blocked by the coil structure 200 of the wireless charging coil 10 can be reduced. The area of ​​the hollow area 100 of the wireless charging coil 10 that is blocked by the coil 80 of the charging base can be reduced, which is beneficial to improving the wireless charging efficiency of the electronic device and shortening the wireless charging time of the electronic device.

[0117] It can be understood that the first direction is the Y direction.

[0118] Exemplarily, the wireless charging coil 10 of the wireless charging module 30 of the present application is a single-layer structure, which is conducive to reducing the overall thickness of the wireless charging module 30. The present application optimizes the routing 230 of the wireless charging coil 10, increases the size of the inner circle of the wireless charging coil 10 in the first direction, and improves the equivalent height of the wireless charging coil 10.

[0119] For example, Figure 5 As shown, without changing the maximum size of the wireless charging coil 10 in the first direction and the second direction, the wiring 230 of the first coil portion 210 at the uppermost end in the first direction is designed to be more dense.

[0120] For example, Figure 5 As shown, along the first direction, the width of the first coil portion 210 is t5. Exemplarily, t5=6.4 mm.

[0121] Exemplarily, the first coil portion 210 includes a plurality of routing groups 270. The plurality of routing groups 270 are arranged along a first direction. Each routing group 270 includes a strand of routing 230, each strand of routing 230 includes a plurality of turns of coils 232, the plurality of turns of coils 232 of each strand of routing 230 are connected in parallel, and the plurality of strands of routing 230 are connected in series. Along the first direction, the plurality of turns of coils 232 of each strand of routing 230 have the same width.

[0122] For example, Figure 5 As shown, along the first direction, the width of the second coil portion 220 at the lower end is t6. For example, t6=11.3 mm.

[0123] Exemplarily, the second coil portion 220 includes a plurality of routing groups 270. The plurality of routing groups 270 are arranged along a first direction. Each routing group 270 includes a strand of routing 230, each strand of routing 230 includes a plurality of turns of coils 232, the plurality of turns of coils 232 of each strand of routing 230 are connected in parallel, and the plurality of strands of routing 230 are connected in series. Along the first direction, the width of the plurality of turns of coils 232 of each strand of routing 230 gradually decreases from the outer circle to the inner circle.

[0124] For example, Figure 5 As shown, the size of the inner coil of the wireless charging coil 10 is adjusted. The maximum length of the outer coil of the coil structure 200 in the first direction is d. Along the first direction, starting from the position height d / 2 upward, the distance between the two third coil parts 260 gradually decreases. Exemplarily, d=48mm.

[0125] like Figure 5 As shown, the distance between the end faces of the two third coil parts 260 facing away from the first coil part 210 is t1. That is, along the second direction, the maximum width of the inner circle of the coil structure 200 is t1. Exemplarily, t1=25mm. Along the first direction, the distance between the two third coil parts 260 gradually decreases to 24.4mm. The maximum length of the inner circle of the coil structure 200 in the first direction is t3, and t3=30mm is exemplary. The maximum length of the outer circle of the coil structure 200 in the second direction is t4.

[0126] It is understandable that when the transceiver coils are wirelessly coupled, the larger the area of ​​the hollow portion 800 of the coil 232 that is partially blocked by the wiring 230 , the lower the charging efficiency.

[0127] like Figure 1 As shown, along the first direction, the wireless charging coil 10' in the related art is offset by 5 mm relative to the coil 80' of the charging base (eg, the vehicle-mounted wireless transmitting coil). Figure 6 As shown, along the first direction, the wireless charging coil 10 of the present application is offset by 5 mm relative to the coil 80 of the charging base. Figure 6It can be seen that the hollow area 100 of the wireless charging coil 10 of the present application is almost not blocked by the coil 80 of the charging base, and the hollow part 800 of the coil 80 of the charging base is almost not blocked by the wireless charging coil 10 .

[0128] When the wireless charging module 30 of the present application is working, the magnetic field at the second coil portion 220 is more concentrated on the inner circle of the coil structure 200, and the magnetic field at the first coil portion 210 is more concentrated on the middle area of ​​the first coil portion 210 in the first direction. Figure 4 shows the magnetic field intensity distribution of the wireless charging coil 10' in the related art, Fig. 9 The magnetic field intensity distribution of the wireless charging coil 10 of the present application is shown.

[0129] like Figure 4 As shown, the magnetic field strength gradually increases from the center of the wireless charging coil 10. Along the first direction, the equivalent height of the wireless charging coil 10 is the center height of the wireless charging coil 10, and the equivalent height is 24 mm.

[0130] like Fig. 9 As shown, the present application reasonably arranges the structure of the wireless charging coil 10 and adjusts the distribution of the magnetic field strength. The equivalent height of the wireless charging coil 10 is 29 mm.

[0131] Depend on Figure 4 and Fig. 9 It can be seen that the maximum length of the wireless charging coil 10 in the first direction is 48 mm, and the maximum length of the wireless charging coil 10 in the second direction is 48 mm. Along the first direction, the wireless charging coil 10 of the present application is 5 mm higher than the equivalent height of the wireless charging coil 10' in the related art.

[0132] When the wireless charging module 30 of the present application is working, the center of the magnetic field will shift to the upper narrower area of ​​the wiring 230. Along the first direction, the width of the first coil part 210 is smaller than the width of the second coil part 220, and the width of the multiple wiring groups 270 of the second coil part 220 gradually decreases, which can increase the equivalent height of the wireless charging module 30 in the first direction.

[0133] Exemplarily, the second coil portion 220 includes three routing groups 270, and along the first direction, the three routing groups 270 are respectively recorded as the first routing group, the second routing group and the third routing group. The first routing group includes three strands of routing, the second routing group includes three strands of routing, and the third routing group includes two strands of routing. Along the first direction, the widths of the three strands of the first routing group are equal, the widths of the three strands of the second routing group are equal, the widths of the two strands of the third routing group are equal, the width of the routing 230 of the second routing group is less than the width of the routing 230 of the first routing group, and the width of the routing 230 of the second routing group is greater than the width of the routing 230 of the third routing group. The strongest magnetic field area of ​​the second coil portion 220 of the wireless charging coil 10 will still be biased toward the inner circle of the coil structure 200, and the magnetic field center of the wireless charging coil 10 will be offset upward, so that the equivalent height in the first direction will be increased upward.

[0134] Exemplarily, the second coil portion 220 includes eight routing groups 270, each routing group 270 includes a routing line 230. It is understandable that the second coil portion 220 includes eight routing lines 230, and the eight routing lines 230 are connected in series. The outermost routing line 230 includes three turns of coils 232 connected in parallel. The innermost routing line 230 includes one turn of coil 232. The remaining six routing lines 230 each include two turns of coils 232 connected in parallel. That is, the second coil portion 220 includes 16 turns of coils 232. The width from the outermost routing line 230 to the innermost routing line 230 gradually narrows, which can increase the equivalent height in the first direction. And this setting is more flexible in adjusting the overall inductance and impedance of the wireless charging module 30.

[0135] It is understandable that the charging performance of the wireless charging module 30 is correlated with the coupling value of the transceiver coil. In the related art, under the influence of the camera module of the electronic device, along the first direction, the distance from the center of the wireless charging module 30' to the bottom of the electronic device is 65mm. In the charging seat (such as a car wireless charging seat), along the first direction, the distance from the center of the coil 80' of the charging seat to the bottom of the charging seat is 72mm. Fig.10 As shown, when the wireless charging coil 10' of the electronic device in the related art (i.e., along the first direction, the distance from the center of the wireless charging module 30' to the bottom of the electronic device is 65mm) is used with a charging stand (along the first direction, the distance from the center of the coil 80' of the charging stand to the bottom of the charging stand is 72mm), the wireless charging module 30' of the electronic device is at risk of being disconnected at any time. When the electronic device of the present application is used with a charging stand (along the first direction, the distance from the center of the coil 80 of the charging stand to the bottom of the charging stand is 72mm), the coupling conditions of normal fast charging can be met, and the charging experience of third-party wireless charging accessories (i.e., charging stands), especially vehicle-mounted wireless charging stands, is significantly improved.

[0136] Exemplarily, the present application reasonably arranges the matching structure of the wireless charging module 30 , which is beneficial to increasing the thickness of the wireless charging coil 10 and optimizing the impedance of the wireless charging module 30 .

[0137] In related technologies, such as Figure 2 and Figure 3 As shown, the wireless charging module 30' includes a double-layer wireless charging coil. From the top layer to the bottom layer, the wireless charging module 30' includes a covering layer 300', a wireless charging coil 10', a supporting layer 700', a wireless charging coil 10', a covering layer 300', a supporting layer 700', a shielding layer 400' and a protective layer 600'.

[0138] In this application, if Figure 7 and Figure 8 As shown, the wireless charging module 30 includes a covering layer 300 (e.g., a CVL (cover lay) layer), a wireless charging coil 10 (e.g., the wireless charging coil 10 includes a base copper 240 and a copper plating 250), a supporting layer 700 (e.g., a polyimide film), a shielding layer 400 (e.g., a nanocrystalline shielding sheet) and a protective layer 600 (e.g., a polyethylene terephthalate layer). Compared with the related art, the wireless charging coil 10 of the present application is a single-layer structure, and the wireless charging coil 10 has only one jumper connecting the inner and outer circles of the coil 232. The jumper area of ​​the nanocrystalline shielding sheet is provided with a hollow area 410, and the jumper part and the nanocrystalline shielding sheet are inlaid and stacked into one layer. The present application eliminates a covering layer 300 and a supporting layer 700, and the supporting layer 700 and the shielding layer 400 are bonded by laminating glue, thereby reducing the thickness of the wireless charging module 30, specifically, by 0.02 mm. That is to say, the present application improves the structure of the wireless charging module 30. Compared with the wireless charging module 30' of the related art, under the condition of the same module thickness, a thicker routing line 230 design can be used to achieve lower impedance, so that the wireless charging module 30 has better performance.

[0139] Exemplarily, in the present application, the maximum length of the wireless charging coil 10 in the first direction is 48 mm, and the maximum length of the wireless charging coil 10 in the second direction is 48 mm. Along the first direction, the height from the center of the wireless charging module 30 to the bottom of the electronic device is 65 mm. Along the first direction, the equivalent height of the wireless charging coil 10 is 69 mm. The wireless charging coil 10 is "D" shaped. Along the first direction, the width of the first coil portion 210 (e.g., 6.4 mm) is smaller than the width of the second coil portion 220 (e.g., 11.3 mm), and the widths of the multiple wiring groups 270 of the second coil portion 220 gradually decrease. The maximum length of the inner circle of the wireless charging coil 10 in the second direction is 25 mm. Along the first direction, from a position height of 25 mm upwards, the length of the inner circle of the wireless charging coil 10 in the second direction narrows to 24.4 mm. As Figure 8 As shown, the wireless charging module 30 includes a covering layer 300, a wireless charging coil 10, a supporting layer 700, a flexible circuit board 500, a shielding layer 400 and a protective layer 600. Along the direction from the covering layer 300 to the protective layer 600, the thickness of the wireless charging module 30 is 0.16mm, and the thickness of the wireless charging coil 10 (e.g., the copper of the trace 230) is 50um (e.g., the thickness of the base copper 240 is 35um, and the thickness of the copper plating 250 is 15um). The present application improves the structure of the wireless charging module 30. Compared with the wireless charging module 30' of the related art, the thickness can be reduced by 0.18mm under the condition of equal performance.

[0140] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0141] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A wireless charging coil, characterized in that: include: Hollow area; A coil structure, wherein the coil structure is arranged around the hollow area; The coil structure comprises a first coil portion and a second coil portion, and along a first direction, the hollow area is located between the first coil portion and the second coil portion; The first coil portion and the second coil portion each include a plurality of wiring groups, and the plurality of wiring groups are arranged along the first direction; Along the first direction, the width of the first coil portion is smaller than the width of the second coil portion, and the widths of the plurality of routing groups of the second coil portion gradually decrease.

2. The wireless charging coil according to claim 1, characterized in that: Each of the wiring groups includes at least one wiring strand, and each wiring strand includes at least one coil turn; When the wiring group includes a plurality of wiring strands, the plurality of wiring strands are arranged along the first direction; When the routing includes a plurality of turns of the coil, the plurality of turns of the coil are arranged along the first direction.

3. The wireless charging coil according to claim 2, characterized in that: In the second coil portion, when the numbers of the wirings of two adjacent wiring groups are the same, the width of the wiring of the wiring group located on the outer side is greater than the width of the wiring of the wiring group located on the inner side.

4. The wireless charging coil according to claim 2, characterized in that: In two adjacent wiring groups of the second coil portion, the number of wirings in the wiring group located on the outer side is greater than the number of wirings in the wiring group located on the inner side.

5. The wireless charging coil according to claim 4, characterized in that: The width of the wiring of the wiring group located on the outer side is greater than the width of the wiring of the wiring group located on the inner side.

6. The wireless charging coil according to claim 2, characterized in that: In the second coil portion, when each of the wiring groups includes one strand of the wiring, the numbers of coils of two adjacent strands of the wiring are the same, and the width of the coil of the wiring located on the outside is greater than the width of the coil of the wiring located on the inside.

7. The wireless charging coil according to claim 2, characterized in that: In the second coil portion, when each of the wiring groups includes one strand of the wiring, the number of coils of the wiring located on the outer side of two adjacent strands of the wiring is greater than the number of coils of the wiring located on the inner side.

8. The wireless charging coil according to claim 7, characterized in that: The width of the coil of the routing line located on the outside is equal to the width of the coil of the routing line located on the inside.

9. The wireless charging coil according to any one of claims 1 to 8, characterized in that: Along the first direction, the widths of the plurality of wiring groups of the first coil portion are uniform.

10. The wireless charging coil according to any one of claims 1 to 8, characterized in that: The maximum length of the outer loop of the coil structure in the first direction is d; The portion of the coil structure located between the first coil portion and the second coil portion includes two third coil portions; Along the second direction, the hollow area is located between two of the third coil parts; Along the first direction, the height of the position where the end surface of the third coil portion is away from the first coil portion is d / 2; Along the first direction, the distance between the two third coil parts gradually decreases; or Along the first direction, the distance between the two third coil parts first decreases and then becomes equal; or Along the first direction, the intervals between the two third coil parts are equal.

11. A wireless charging module, characterized in that: include: The wireless charging coil according to any one of claims 1 to 10.

12. The wireless charging module according to claim 11, characterized in that: Also includes: Covering layer; A supporting layer, wherein the wireless charging coil is located between the covering layer and the supporting layer; A shielding layer, arranged on a side of the supporting layer away from the covering layer, the shielding layer being provided with a hollow area; A flexible circuit board, a portion of which is disposed in the hollow area; The protective layer is arranged on a side of the shielding layer away from the supporting layer.

13. An electronic device, characterized in that: include: Camera module; and In the wireless charging module as described in claim 11 or 12, the first coil portion is located between the second coil portion and the camera module.

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