Wireless charging coil, wireless charging component and electronic device

Abstract

The embodiment of the present application provides a wireless charging coil, a wireless charging component and an electronic device, wherein the wireless charging coil comprises a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, the second connection end is arranged at the edge of the wireless charging coil, and the first connection end is used to directly connect to a connection point on a circuit board. The thickness of the wireless charging coil can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a wireless charging coil, a wireless charging component and an electronic device. Background Art

[0002] With the popularity of wireless charging, more and more electronic devices support functions such as wireless charging. For example, smartphones and wireless charging bases. Smartphones and wireless charging bases perform contactless wireless charging through wireless charging coils.

[0003] However, the existing wireless charging coil includes a first tap and a second tap, which are used to connect the wireless charging circuit, wherein the first tap is set at the outer edge of the wireless charging coil, and the second tap is pulled out from the inside of the wireless charging coil to be parallel to the first tap, and the first tap and the second tap together facilitate the electrical connection between the wireless charging coil and the motherboard. However, because the second tap is pulled out from the inside of the wireless charging coil, the area where the second tap extends from the inside of the wireless charging coil to the edge of the wireless charging coil will have the thickness of two layers of wiring, which increases the thickness of the wireless charging coil. Summary of the invention

[0004] The embodiments of the present application provide a wireless charging coil, a wireless charging component and an electronic device, which can reduce the thickness of the wireless charging coil.

[0005] An embodiment of the present application provides a wireless charging coil, which includes a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, the second connection end is arranged at the edge of the wireless charging coil, and the first connection end is used to directly connect to a connection point on a circuit board.

[0006] The present application embodiment provides a wireless charging component, which includes:

[0007] A wireless charging coil, the wireless charging coil comprising a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, and the second connection end is arranged at an edge of the wireless charging coil;

[0008] A circuit board, the circuit board comprising a first connection point and a second connection point arranged on a surface of the circuit board, the first connection point being directly electrically connected to the first connection end, the second connection point being electrically connected to the second connection end, and the first connection point and the second connection point being used to electrically connect a wireless charging circuit.

[0009] The embodiment of the present application further provides an electronic device, which includes a housing and a wireless charging component, wherein the wireless charging component is arranged in the housing, and the wireless charging component includes a wireless charging coil and a circuit board;

[0010] The wireless charging coil comprises a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, and the second connection end is arranged at the edge of the wireless charging coil;

[0011] The circuit board includes a first connection point and a second connection point arranged on the surface of the circuit board, the first connection point is directly electrically connected to the first connection end, the second connection point is electrically connected to the second connection end, and the first connection point and the second connection point are used to electrically connect the wireless charging circuit.

[0012] The wireless charging coil provided in the embodiment of the present application includes a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, the second connection end is arranged at the edge of the wireless charging coil, and the first connection end is used to directly connect to the connection point on the circuit board. The first connection end of the wireless charging coil is directly electrically connected to the connection point of the circuit board inside the wireless charging coil, and does not need to be pulled out from the wireless charging coil to the outside of the wireless charging coil. The output line of the first connection end does not need to pass through the wireless charging coil, and there will be no two layers of thickness of the wireless charging coil routing, thereby reducing the thickness of the wireless charging coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the wireless charging coil provided in an embodiment of the present application.

[0015] Figure 2 This is a schematic diagram of the first structure of the wireless charging component provided in the embodiment of the present application.

[0016] Figure 3 This is a second structural diagram of the wireless charging component provided in an embodiment of the present application.

[0017] Figure 4 This is a third structural schematic diagram of the wireless charging component provided in an embodiment of the present application.

[0018] Figure 5 yes Figure 4 Cross-sectional view along the A-A' direction.

[0019] Figure 6 This is a fourth structural schematic diagram of the wireless charging component provided in an embodiment of the present application.

[0020] Figure 7 This is a fifth structural diagram of the wireless charging component provided in the embodiment of the present application.

[0021] Figure 8 It is an overall schematic diagram of the wireless charging provided in the embodiment of the present application.

[0022] Fig. 9 It is a schematic structural diagram of a wireless charging device provided in an embodiment of the present application.

[0023] Fig.10 It is a schematic structural diagram of a wireless charging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being not in direct contact but in contact through another feature between them. The disclosure below provides many different embodiments or examples for realizing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0027] The embodiments of the present application provide a wireless charging coil, a wireless charging component and an electronic device, which will be described in detail below.

[0028] Wireless charging technology does not require cables to complete power transmission, so it is becoming more and more popular. Wireless charging technology generally connects an adapter to a wireless charging device (such as a wireless charging base), and transmits the output power of the adapter to the device to be charged in a wireless manner (such as electromagnetic waves) through the wireless charging device, so as to wirelessly charge the device to be charged.

[0029] According to different wireless charging principles, wireless charging methods are mainly divided into three types: magnetic coupling (or electromagnetic induction), magnetic resonance and radio waves.

[0030] At present, the mainstream wireless charging standards include the QI standard, the Power Matters Alliance (PMA) standard, and the Alliance for Wireless Power (A4WP). Both the QI standard and the PMA standard use magnetic coupling for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

[0031] The wireless charging coil, wireless charging assembly and electronic device provided by the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0032] See also Figure 1 , Figure 1 : is a schematic diagram of a wireless charging coil provided in an embodiment of the present application. The wireless charging coil 52 includes a first connection end 522 and a second connection end 523, wherein the first connection end 522 is arranged in the middle of the wireless charging coil 52, and the second connection end 523 is arranged at the edge of the wireless charging coil 52, and the first connection end 52 is used to directly connect to a connection point on a circuit board.

[0033] Among them, the wireless charging coil 52 may include a metal wire that can be wound by a section of metal wire. Specifically, the metal wire includes a first connection end 522 and a second connection end 523, the first connection end 522 remains stationary, the metal wire is wound around the first connection end 522 for multiple turns, and the radius of the multiple turns of the metal wire gradually increases so that the multiple turns of the metal wire do not overlap in the thickness direction, and the two adjacent turns of the metal wire can be arranged adjacently, and the second connection end 523 is at the outermost side of the multiple turns of the metal wire. The multiple turns of the metal wire include at least two turns. The two adjacent turns of the metal wire may also be arranged non-adjacently. An insulating layer is provided outside the metal wire, and the metal wire may be an enameled wire, etc. The metal wire may be made of a metal or alloy with good wire performance, such as copper, copper alloy, gold, etc. The length of the metal wire section is set according to the requirements of the wireless charging coil, and the diameter of the metal wire is generally 1mm-2mm. Among them, the first connection end 522 and the second connection end 523 can be directly electrically connected to the external conductor, such as being connected by soldering and inserted into the conductive hole, and the hole wall of the conductive hole is metal.

[0034] The first connection end 522 is directly electrically connected to the connection point of the circuit board in the wireless charging coil 52, and does not need to be pulled out from the wireless charging coil 52 to the outside of the wireless charging coil 52. The outlet line of the first connection end 522 does not need to pass through the wireless charging coil 52, unlike the prior art, where the first connection end 522 extends from the inside of the wireless charging coil 52 to the outside of the wireless charging coil 52. There will be no two layers of coil wiring thickness, which reduces the thickness of the wireless charging coil 52. For example, smartphones are becoming thinner and thinner. The wireless charging coil in the existing solution has two layers of wiring, which is thick and is not conducive to the thinness of smartphones. In the wireless charging coil assembly of this embodiment, the thickness of the wireless charging coil 52 is a single layer of wiring, which meets the thickness requirements of smartphones. Among them, the connection point of the circuit board can be connected to the wireless charging circuit through the wiring printed on the circuit board.

[0035] In some embodiments, the wireless charging coil 52 includes at least two turns of metal wire, a gap is provided between two adjacent turns of metal wire among the at least two turns of metal wire, and a non-conductive material is provided in the gap.

[0036] The metal wire can be first wound to form multiple turns of metal wire, and the radius of the multiple turns of metal wire gradually increases, wherein there is a gap between two adjacent turns of metal wire, and then non-conductive materials such as plastic, plastic and other materials are filled into the adjacent gaps to finally form a wireless charging coil. Conductive ports are respectively reserved at both ends of the wireless charging coil. The first connection end is in the middle of the wireless charging coil, and is at the edge of the wireless charging coil.

[0037] In some embodiments, the upper surface of the wireless charging coil 52 may be a plane, and in some other embodiments, the lower surface of the wireless charging coil 52 may also be a plane. The cross-section of the metal wire in the wireless charging coil 52 may be circular, or other shapes, such as oval, square, etc.

[0038] In some embodiments, the wireless charging coil 52 includes at least two turns of metal wire, and the upper surfaces of any two turns of metal wire are in the same plane. It can also be understood that any two turns of metal wire in the wireless charging coil are substantially parallel, and all metal wires are arranged in the same layer.

[0039] In some embodiments, the wireless charging coil 52 includes at least two turns of wire, the wire includes a metal wire and a protective layer wrapping the metal wire, the protective layer is made of non-conductive material, and the upper surface of any one of the at least two turns of wire is in the same plane.

[0040] The wires in the wireless charging coil 52 are first configured as independently insulated wires, that is, the inside of the wires is a metal wire, and the outside is wrapped with a non-conductive protective layer, and any two adjacent turns of the wires are non-conductive to each other. Among them, the upper surface of any one of the two turns of the wires is in the same plane. It can also be understood that any two turns of the wires in the wireless charging coil 52 are roughly parallel, and all the metal wires are arranged in the same layer. The metal wires in the wires can be cylindrical, and the protective layer wrapping the metal wires is also a hollow cylindrical shape. Of course, the metal wires in the wires can also be other shapes, such as elliptical, square, etc. Similarly, the protective layer wrapping the metal wires can also be other shapes, such as elliptical, square, etc.

[0041] In some embodiments, the wireless charging coil 52 includes at least two turns of wire, and two adjacent turns of wire in the at least two turns of wire are arranged at intervals. The wires in the wireless charging coil 52 are arranged at intervals, rather than just being arranged close together. Appropriate adjustments can be made later to meet the needs of different environments.

[0042] In some embodiments, the smallest circle of wire in the wireless charging coil 52 forms a receiving area 524, and the first connection end 522 is disposed in the receiving area 524. The center of the wireless charging coil 52 is not solid, that is, there is a portion of empty space inside, and the empty space is the receiving area 524. The first connection end is disposed in the receiving area 524, and the smallest circle of wire in the wireless charging coil 52 extends a section of wire to connect to the first connection end 522. The first connection end 522 can be disposed in the center of the wireless charging coil 52, that is, the center of the receiving area 524.

[0043] In some embodiments, the wireless charging coil is solid, that is, the center of the wireless charging coil is the first connection end, and the first connection end is surrounded by the wires of the wireless charging coil. The structure is compact and the space utilization rate is the highest.

[0044] See also Figure 2 , Figure 2 1 is a schematic diagram of the first structure of a wireless charging assembly provided in an embodiment of the present application. The wireless charging assembly includes a wireless charging coil 52 and a circuit board 53.

[0045] The wireless charging coil 52 includes a first connection end 522 and a second connection end 523, wherein the first connection end 522 is arranged in the middle of the wireless charging coil 52, and the second connection end 523 is arranged at the edge of the wireless charging coil 52. Specifically, the wireless charging coil 52 includes a section of metal wire, which includes a first connection end 522 and a second connection end 523. The metal wire can be wound around the first connection end 522 for at least two turns to form a coil pattern 521, the first connection end 522 is arranged in the middle of the coil pattern 521, and the second connection end 523 is arranged at the edge of the coil pattern 521.

[0046] The coil pattern 521 can be formed by winding a section of metal wire. Specifically, the metal wire includes a first connection end 522 and a second connection end 523, the first connection end 522 remains stationary, and the metal wire is wound around the first connection end 522 for multiple turns, and the radius of the multiple turns of the metal wire gradually increases so that the multiple turns of the metal wire do not overlap in the thickness direction, and the two adjacent turns of the metal wire can be arranged adjacently, and the second connection end 523 is at the outermost side of the multiple turns of the metal wire. The multiple turns of the metal wire include at least two turns. The two adjacent turns of the metal wire may also be arranged non-adjacently. An insulating layer is provided on the outside of the metal wire, and the metal wire may be an enameled wire, etc. The metal wire may be made of a metal or alloy with good wire performance, such as copper, copper alloy, gold, etc. The length of this section of the metal wire is set according to the requirements of the wireless charging coil, and the diameter of the metal wire is generally 1mm-2mm.

[0047] The circuit board 53 includes a first connection point 531 and a second connection point 532 arranged on the surface of the circuit board 53, the first connection point 531 is directly electrically connected to the first connection end 522, the second connection point 532 is electrically connected to the second connection end 523, and the first connection point 531 and the second connection point 532 are electrically connected to the wireless charging circuit.

[0048] The first connection end 522 of the wireless charging coil 52 is directly electrically connected to the wiring of the circuit board 53 in the coil pattern 521, and does not need to be pulled out from the coil pattern 521 to the outside of the coil pattern 521. The outlet wire of the first connection end 522 does not need to pass through the coil pattern 521, unlike the prior art, where the first connection end 522 extends from the inside of the coil pattern 521 to the outside of the coil pattern 521. There will be no two layers of coil wiring thickness, which reduces the thickness of the wireless charging coil 52. For example, smartphones are getting thinner and thinner. The wireless charging coil in the existing solution has two layers of wiring, which is thick and is not conducive to the thinness of smartphones. However, the thickness of the wireless charging coil 52 in the wireless charging coil assembly of this embodiment is a single layer of wiring, which meets the thickness requirements of smartphones.

[0049] In some embodiments, the innermost circle of metal wire of the wireless charging coil 52 forms a hollow area, and the first connection end 522 is arranged in the hollow area. The first connection point 531 is arranged corresponding to the hollow area, so that the first connection end 522 and the first connection point 531 can be directly electrically connected in the hollow area. Specifically, the projection of the first connection end 522 on the circuit board 53 intersects or overlaps with the first connection point 531, and the first connection point 531 and the first connection end 522 can be directly welded together by soldering to complete the direct electrical connection between the first connection point 531 and the first connection end 522. It is also possible that the projection of the first connection end 522 on the circuit board 53 does not intersect with the first connection point 531, and there is a distance between the first connection point 531 and the first connection end 522. The distance is small, such as less than 1 cm, and it can still be directly welded together by soldering to complete the direct electrical connection between the first connection point 531 and the first connection end 522.

[0050] In some embodiments, the innermost circle of metal wire of the wireless charging coil 52 is adjacent to the first connection end 522, there is no hollow area in the middle of the wireless charging coil 52, the projection of the first connection end 522 on the circuit board 53 intersects or overlaps with the first connection point 531, and the first connection point 531 and the first connection end 522 can be directly welded together by soldering to complete the direct electrical connection between the first connection point 531 and the first connection end 522.

[0051] The first connection point 531 and the second connection point 532 are electrically connected to the wireless charging circuit and can be connected through a trace printed on the circuit board 53 or through a trace set in the middle layer of the circuit board.

[0052] In some embodiments, the wireless charging coil can be applied to the device to be charged, and the wireless charging circuit on the circuit board can be a wireless receiving charging circuit that receives wireless signals to charge the battery. Figure 3 , Figure 36 is a second structural diagram of a wireless charging component provided in an embodiment of the present application. The wireless charging coil can be applied to a device to be charged 61. For the device to be charged 61 (such as a mobile phone), the device to be charged 61 includes a receiving coil 611 (wireless charging coil) and a wireless receiving circuit 610, a wireless charging power receiving chip 612, a battery charging management chip 613 and a battery 614. Among them, the receiving coil 611 is used to receive energy (such as electromagnetic energy) emitted by the wireless charging device 62 and convert it into an alternating current signal. The wireless charging power receiving chip 612 is electrically connected to the receiving coil 611, and the alternating current signal of the receiving coil 611 is converted into a direct current signal by analog-to-digital conversion (AC-DC). The wireless charging power receiving chip 612 can also perform rectification, filtering and other operations before or after the analog-to-digital conversion. The battery charging management chip 613 is electrically connected to the wireless charging power receiving chip 612, and the direct current signal of the wireless charging power receiving chip 612 is converted into an electrical signal for powering the battery 614, such as voltage conversion. In this embodiment, the wireless charging circuit electrically connected to the receiving coil 611 (wireless charging coil) is the wireless receiving circuit 610 .

[0053] In some embodiments, the wireless receiving circuit 610 also includes a first control chip 615, which is electrically connected to the wireless charging power receiving chip 612 and the battery charging management chip 613 respectively. The first control chip 615 can control the wireless charging power receiving chip 612 and the battery charging management chip 613 to work or stop.

[0054] In some embodiments, the wireless charging coil may be applied to a wireless charging device, and the wireless charging circuit on the circuit board may be a wireless transmitting charging circuit that transmits wireless signals.

[0055] In some embodiments, the wireless charging coil can also be used on the wireless charging device 62. For the wireless charging device 62 (such as a wireless charging base), the wireless charging device 62 includes a transmitting coil 623 (wireless charging coil) and a wireless transmitting circuit 620. The wireless transmitting circuit 620 includes: a voltage conversion module 621 and a wireless charging power transmitting chip 622. Among them, the voltage conversion module 621 converts the voltage, such as increasing the voltage of the circuit. The wireless charging power transmitting chip 622 is electrically connected to the voltage conversion module 621, and the increased voltage is converted into an analog-to-digital converter (DC-AC) to obtain an alternating current signal. The transmitting coil 623 is electrically connected to the wireless charging power transmitting chip 622, and the alternating current signal is converted into electromagnetic energy and transmitted. In this embodiment, the wireless charging circuit electrically connected to the transmitting coil 623 (wireless charging coil) is the wireless transmitting circuit 620.

[0056] The wireless transmitting circuit 620 may also include a wired interface, which is connected to a power source (mains power) through an adapter, and the adapter converts the power source (such as AC 220V) into an electrical signal suitable for the wireless charging device (such as DC 5V). The wired interface is electrically connected to the voltage conversion module 621.

[0057] In some embodiments, the wireless transmitting circuit 620 also includes a second control chip 624, which is electrically connected to the voltage conversion module 624 and the wireless charging power transmitting chip 622 respectively. The second control chip 624 can control the voltage conversion module 621 and the wireless charging power transmitting chip 622 to work or stop.

[0058] In some embodiments, the wireless charging power transmitter chip 622 can be replaced by an inverter circuit and a resonant circuit. The inverter circuit may include multiple switch tubes, and the output power can be adjusted by controlling the on-time (duty cycle) of the switch tubes. The resonant circuit is used to transmit electrical energy. For example, the resonant circuit may include a capacitor and a transmitting coil. By adjusting the resonant frequency of the resonant circuit, the output power of the wireless transmitting circuit can be adjusted.

[0059] The first connection point 531 is electrically connected to the first connection end 522 , the second connection point 532 is electrically connected to the second connection end 523 , the first connection point 531 and the second connection point 532 are connected to the wireless charging circuit 54 , and the wireless charging circuit 54 controls the wireless charging coil 52 to send or receive energy.

[0060] Specifically, in some embodiments, the first connection point 531 is a soldering pad, and the first connection point 531 is connected to the first connection end 522 by welding.

[0061] In some embodiments, the second connection point 532 is a pad, and the second connection point 532 is connected to the second connection end 523 by welding.

[0062] In some embodiments, the first connection point 531 is a pad, and the first connection point 531 is welded to the first connection end 522 ; the second connection point 532 is a pad, and the second connection point 532 is welded to the second connection end 523 .

[0063] In some embodiments, metal pins are provided at the first connection point 531 and / or the second connection point 532 , and the first connection end 522 and the second connection end 523 of the wireless charging coil 52 are respectively welded to the first connection point 531 and the second connection point 532 .

[0064] See also Figure 4 and Figure 5 , Figure 4 is a third structural schematic diagram of the wireless charging assembly provided in the embodiment of the present application, Figure 5 yes Figure 4 The circuit board 53 also includes an insulating layer 55 disposed on the surface, a first notch 551 is disposed in the middle of the insulating layer 55, and a first connection point 531 is disposed in the first notch 551; the circuit board 53 also includes a wiring layer disposed in the middle, one end of a first wiring 533 in the wiring layer is electrically connected to the first connection point 531 in the first notch 551, and the other end of the first wiring 533 is electrically connected to the second connection point 532 respectively to the wireless charging circuit.

[0065] The first notch 551 may have the same shape as the first connection point 531 , such as circular, elliptical, square, rectangular, etc. The first notch 551 may also have a different shape from the first connection point 531 , and the area of ​​the first notch 551 may be smaller than the area of ​​the first connection point 531 .

[0066] The wiring layer is arranged in the middle of the circuit board 53, and the thickness of the wiring layer is very small. For example, a metal layer such as copper metal is coated on the substrate, and then etched to form the required wiring layer, and the thickness of the wiring layer is 15um-70um. Moreover, the wiring layer itself exists and will not increase the thickness. It is only necessary to design the routing of the first connection end 522 of the wireless charging coil corresponding to the wiring layer to the first connection point 531 during design. The thickness of the metal wire of the wireless charging coil generally needs to be 1mm-2mm. If the first connection end of the wireless charging coil is led from the inside to the outside through a metal wire, the thickness of this part is 2mm-4mm, and the thickness increases significantly, which is not conducive to the thinness of electronic devices such as mobile phones.

[0067] An insulating layer 55 is provided on the surface of the circuit board 53, and the wireless charging coil 52 is arranged on the insulating layer 55, wherein a first notch 551 is provided in the middle of the insulating layer 55, and the first notch 551 corresponds to the hollow area in the middle of the wireless charging coil 52, and the space surrounded by the innermost circle of metal wire of the coil pattern 521 is the hollow area. A first connection point 531 is provided in the first notch 551, and the first connection end 522 of the wireless charging coil 52 arranged in the middle of the coil pattern 521 can be electrically connected to the first connection point 531. A wiring layer is provided under the insulating layer 55 of the circuit board 53, and the wiring layer has a first routing line 533. The first connection point 531 is a connection point in the first routing line 533. The first connection end 522 of the wireless charging coil 52 is connected to one end of the first routing line 533 through the first connection point 531, and the other end of the first routing line 533 is electrically connected to the wireless charging circuit 54 at other positions of the circuit board 53. The second connection point 532 can be directly electrically connected to the wireless charging circuit 54, that is, the wireless charging circuit 54 is also disposed on the circuit board 53, and the wireless charging circuit 54 is directly electrically connected to the second connection point 532, or the pad of the element (such as a capacitor, a chip) in the wireless charging circuit 54 connected to the wireless charging coil 52 is the second connection point 532. The first connection point 531 is electrically connected to the wireless charging circuit 54 through the wiring of the circuit board 53.

[0068] The circuit board 53 may be a multilayer board, and other layers such as a power layer, a ground layer, etc. may be provided between the wiring layer and the insulating layer 55. A through hole is provided between the wiring layer and the first notch 551, and a wire is provided in the through hole. One end of the first trace 533 in the wiring layer is electrically connected to the first connection end 522 of the wireless charging coil 52 through the wire in the through hole.

[0069] The wiring layer may include multiple sub-wiring layers, and the first wiring line 533 electrically connected to the wireless charging coil 52 is arranged in the first sub-wiring layer, and other sub-wiring layers may be arranged between the first sub-wiring layer and the insulating layer 55. A through hole is arranged between the first wiring layer and the first notch 551, and a wire is arranged in the through hole. One end of the first wiring line 533 in the first wiring layer is electrically connected to the first connection end 522 of the wireless charging coil 52 through the wire in the through hole.

[0070] In some embodiments, a second notch 552 is provided in the middle of the insulating layer 55, and a second connection point 532 is provided in the second notch 552; the wiring layer also includes a second routing line 534, one end of the second routing line 534 is electrically connected to the second connection point 532 in the second notch 552, and the other end of the first routing line 533 and the other end of the second routing line 534 are respectively electrically connected to the wireless charging circuit 54.

[0071] The second notch 552 is similar to the first notch 551, and is used to set the second connection point 532, and electrically connect the second connection point 532 to the second routing line 534 of the wiring layer. The second routing line 534 and the first routing line 533 can be set in the same layer, one end of the second routing line 534 is electrically connected to the second connection point 532 in the second notch 552, and the other end of the first routing line 533 and the other end of the second routing line 534 are electrically connected to the wireless charging circuit 54 respectively. The first connection point 531 and the second connection point 532 are both electrically connected to the wireless charging circuit 54 through the routing of the circuit board 53, that is, the first connection end 522 and the second connection end 523 of the wireless charging coil 52 are electrically connected to the wireless charging circuit 54 through the first routing line 533 and the second routing line 534 in the circuit board 53 respectively.

[0072] See also Figure 6 , Figure 6 This is a fourth structural schematic diagram of the wireless charging component provided in the embodiment of the present application. The first routing line 533 includes a first routing line 5331 and a second routing line 5332. The projection of the first routing line 5331 on the circuit board 53 is inside the coil pattern 521. The projection of the second routing line 5332 on the circuit board 53 is outside the coil pattern 521. The second routing line 5332 is arranged adjacent to the second routing line 534.

[0073] The first routing line 533 is divided into a first routing line 5331 and a second routing line 5332. The projection of the first routing line 5331 on the circuit board 53 is inside the coil pattern 521, that is, the first routing line 5331 extends from inside the coil pattern 521 to outside the coil pattern 521, and the projection of the second routing line 5332 on the circuit board 53 is outside the coil pattern 521. The second routing line 5332 is arranged adjacent to the second routing line 534. It is convenient to arrange the routing lines at both ends of the wireless charging coil 52 on the circuit board 53. Among them, the second routing line 5332 and the second routing line 534 can be arranged in parallel. In addition, the first routing line 533 and the second routing line 534 transmit AC signals, which have greater interference. The first routing line 533 and the second routing line 534 are arranged adjacently and in parallel, which reduces the contact area between the AC signal and other modules, can reduce the impact on other modules, and facilitate wiring.

[0074] Please combine Figure 7 , Figure 7 The first wiring 533 divides the circuit board 53 into at least two areas. The circuit board 53 also includes a functional module 57. The functional module 57 includes multiple components, and the multiple components are arranged in the same area.

[0075] The first line 533 extends from the wireless charging circuit 54 to the first connection point 531, and divides the circuit board 53 into at least two areas. Other functional modules 57 are also arranged on the circuit board 53. Taking a smart phone as an example, the other functional modules 57 can be audio modules or display modules. Each functional module 57 includes multiple components. If multiple components of a functional module 57 are arranged on both sides of the first line 533, because the AC signal transmitted by the first line 533 causes serious interference when the components arranged on both sides of the first line 533 interact with each other, the performance of the functional module 57 is affected. Therefore, multiple components of a functional module 57 are arranged in the same area, that is, arranged on one side of the first line 533, and of course, can also be arranged on one side of the second line 534. Reduce the influence of the first line 533 and / or the second line 534 on other functional modules. Among them, the first line 533 and the second line 534 can be arranged in parallel and adjacent to each other.

[0076] If the first routing line 533 and the second routing line 534 are routed separately, the multiple components of the functional module 57 are arranged on one side of the first routing line 533 and the second routing line 534 , that is, the multiple components of the functional module 57 are not arranged on both sides of the first routing line 533 or the second routing line 534 .

[0077] In some embodiments, the first connection end 522 is disposed at the center of the coil pattern 521. It is convenient to separate the first connection end 522 from the coil pattern 521, and to facilitate the welding connection between the first connection end 522 and the first connection point 531. The wires in the coil pattern 521 are arranged adjacent to each other, and the radius of each circle gradually decreases from the outside to the inside. A hollow area is provided in the center of the coil pattern 521, and the first connection end 522 extends from the end of the coil pattern 521 to the middle of the hollow area, and is no longer arranged adjacent to the wire of the coil pattern 521.

[0078] The first connection end 522 can be set at the center of the coil pattern 521, and a position for the wireless charging coil 52 is reserved in advance on the circuit board 53, and a first connection point 531 and a second connection point 532 corresponding to the first connection end 522 and the second connection end 523 are set. The first connection point 531 and the second connection point 532 can be soldering pads. The first connection point 531 as a soldering pad is set at the center of the coil pattern 521. The space for welding the first connection end 522 and the first connection point 531 is large, which is convenient for operation. Moreover, they are far away from the surrounding coil patterns 521, and it is not easy to leave residual solder.

[0079] In some embodiments, the electronic device includes a housing and a wireless charging component, the wireless charging component is disposed in the housing, and the wireless charging component includes a wireless charging coil and a circuit board.

[0080] The wireless charging coil includes a section of metal wire, the metal wire includes a first connection end and a second connection end, the metal wire is wound around the first connection end for at least two turns to form a coil pattern, the first connection end is arranged in the middle of the coil pattern, and the second connection end is arranged at the edge of the coil pattern. The circuit board includes a first connection point and a second connection point arranged on the surface of the circuit board, the first connection point is electrically connected to the first connection end, the second connection point is electrically connected to the second connection end, the projection of the first connection end on the circuit board coincides with the first connection point, and the first connection point and the second connection point are used to electrically connect the wireless charging circuit. The electronic device can be a charging device, such as a wireless charging base, or a device to be charged, such as a smart phone.

[0081] It should be noted that the wireless charging component may also be the wireless charging component of any of the above embodiments.

[0082] In some embodiments, the electronic device further includes a battery, the wireless charging component is electrically connected to the battery, and the wireless charging component is used to charge the battery.

[0083] The electronic device is a device to be charged, and the wireless charging coil in the wireless charging assembly is used to receive energy and convert it into electrical energy, and then charge the battery inside the electronic device. The electronic device can be a smart phone, a tablet computer, or other device with a battery and a wireless charging assembly. Smart phones are becoming thinner and thinner. The wireless charging coil in the existing solution has two layers of wiring, which is thick and is not conducive to the thinness of smart phones. The thickness of the wireless charging coil in the wireless charging coil assembly of this embodiment is a single layer of wiring, which meets the thickness requirements of smart phones.

[0084] In some embodiments, the electronic device further includes a control module, and the control module is used to control the wireless charging coil to convert electrical energy into electromagnetic energy and transmit it.

[0085] The wireless charging coil in the wireless charging component is used to convert electrical energy into electromagnetic energy and transmit it. The electronic device is a wireless charging device, such as a wireless charging base or other equipment.

[0086] The wireless charging base may include a backup battery, and the wireless charging base may be connected to the power source by wire through an adapter, or the wireless charging base may be directly connected to the power source by wire. The wireless charging base may charge the backup battery, and when the power source is out of power, such as a power outage in a city, the backup battery may be used to wirelessly charge other devices to be charged.

[0087] In some embodiments, the electronic device can also be an accessory, and the wireless charging coil in the wireless charging component of the accessory is used to receive energy and convert it into electrical energy. Then the accessory is connected to other devices such as a smartphone by wire. For example, the accessory has a first connection port, and the first connection port is physically connected to the second connection port of the smartphone. Then the accessory converts the energy received by the wireless charging coil it has into electrical energy, and then the electrical energy is used to charge the battery of the smartphone through the first connection port of the accessory and the second connection port of the smartphone. The accessory can be made into a rear shell or front shell or bracket or protective shell of a smartphone. Of course, the accessory can also be used in other forms.

[0088] like Figure 8 As shown, the device to be charged 22 cooperates with the wireless charging device 31 for wireless charging. The wireless charging device 31 is connected to a power source, such as a mains, through an adapter 41. The adapter 41 converts the mains, such as 220V, into a voltage suitable for the wireless charging device 31. The wireless charging device 31 includes a voltage conversion circuit 311, a wireless transmitting circuit 312, and a first control module 313. The device to be charged 22 includes a wireless receiving circuit 221, a buck conversion circuit component 222, a battery 223, and a second control module 224.

[0089] The wireless charging device 31 may include a voltage conversion circuit 311, a wireless transmitting circuit 312 and a first control module 313. The voltage conversion circuit 311 is electrically connected to the adapter 41 and the wireless transmitting circuit 312 respectively, and the wireless transmitting circuit 312 sends out energy to charge the device to be charged 22. The first control module 313 is electrically connected to the voltage conversion circuit 311 and the wireless transmitting circuit 312 respectively. The voltage conversion circuit 311 is used to convert the voltage of the power input to the wireless charging device 31, for example, converting the input mains power (such as 220V) into a suitable voltage (such as 15V, 12V, 9V, etc.). The wireless transmitting circuit 312 is used to convert electrical energy into electromagnetic energy and then transmit the electromagnetic energy. The first control module 313 is used to control the opening and closing of the voltage conversion circuit 311 and the wireless transmitting circuit 312, and can also be used to detect whether the return information of the device to be charged 322 is received, and then control the opening and closing of the voltage conversion circuit 311 and the wireless transmitting circuit 312 according to the return information. The returned information may include battery information of the device to be charged 322 , such as whether the battery is fully charged, and the returned information may also include charging type information of the charging device 322 .

[0090] The device to be charged 22 includes a wireless receiving circuit 221, a buck conversion circuit 222 and a battery 223 which are electrically connected in sequence, and the device to be charged 22 also includes a second control module 224 which is electrically connected to the wireless receiving circuit 221 and the buck conversion circuit 222. Among them, the wireless receiving circuit 221 is used to receive the electromagnetic energy emitted by the wireless transmitting circuit 312 of the wireless charging device 31, and convert the electromagnetic energy into electrical energy. The buck conversion circuit 222 is used to reduce the voltage of the electrical energy converted from the electromagnetic energy (such as from 15V to 9V, 9V to 5V, etc.). Specifically, the high voltage and low current output by the wireless receiving circuit 221 is converted into a low voltage and high current. The second control module 224 can be used to control the opening and closing of the wireless receiving circuit 221 and the buck conversion circuit 222. It can also be used to detect whether the information sent by the wireless charging device 31 is received, and then control the opening and closing of the wireless receiving circuit 221 and the buck conversion circuit 222 according to the received information.

[0091] In one embodiment, during the wireless charging process of the device to be charged, the wireless charging device and the device to be charged perform bidirectional communication, thereby the wireless charging device can determine charging parameters (e.g., charging voltage / charging current) and charging modes (e.g., charging modes using different charging powers) with the device to be charged.

[0092] In one embodiment, the wireless charging device and the device to be charged perform bidirectional communication to obtain the voltage and / or current of the battery of the device to be charged; and adjust the transmission power of the wireless transmission circuit 312 according to the voltage and / or current of the battery.

[0093] Optionally, in some embodiments, the communication information between the wireless charging device and the device to be charged includes at least one of the following information: battery temperature information; information indicating the peak value or average value of the output voltage and / or output current of the wireless receiving circuit; indication information of entering overvoltage protection or overcurrent protection; power transmission efficiency information, used to indicate the power transmission efficiency between the wireless transmitting circuit and the wireless receiving circuit.

[0094] Optionally, in some embodiments, the communication information includes power transmission efficiency information, and the wireless charging device may determine the adjustment range of the transmission power of the wireless transmission circuit according to the power transmission efficiency information.

[0095] Optionally, in some embodiments, the wireless charging device supports a first wireless charging mode and a second wireless charging mode, wherein the wireless charging device charges the device to be charged faster in the first wireless charging mode than in the second wireless charging mode.

[0096] Optionally, in some embodiments, the wireless charging apparatus communicates with the device to be charged to negotiate to use the first wireless charging mode or the second wireless charging mode for wireless charging.

[0097] Optionally, in some embodiments, the wireless charging device communicates with the device to be charged to negotiate the use of the first wireless charging mode or the second wireless charging mode for wireless charging, which may include: performing handshake communication with the device to be charged, and when the handshake communication is successful, controlling the wireless charging device to use the first wireless charging mode to charge the device to be charged; when the handshake communication fails, controlling the wireless charging device to use the second wireless charging mode to charge the device to be charged.

[0098] In wireless charging, both the wireless transmitting circuit 312 and the wireless receiving circuit 221 require a wireless charging coil, which can be used to convert electrical energy into electromagnetic energy or convert electromagnetic energy into electrical energy.

[0099] The electronic devices used in the embodiments of the present application may include, but are not limited to, devices configured to receive / send communication signals via a wired line connection (such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network) and / or via a wireless interface (for example, for a cellular network, a wireless local area network (WLAN), a digital television network such as a digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal). A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" and / or a "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals which may combine a cellular radiotelephone with data processing, fax, and data communications capabilities; personal digital assistants (PDAs) which may include a radiotelephone, a pager, Internet / Intranet access, a Web browser, a notepad, a calendar, and / or a global positioning system (GPS) receiver; and conventional laptop and / or palmtop receivers or other electronic devices that include a radiotelephone transceiver.

[0100] The wireless charging device of the embodiment of the present application includes an adapter, and the adapter includes a control unit. The embodiment of the present application does not specifically limit the communication content between the control unit of the adapter and the electronic device (such as a smart phone), and the control method of the control unit over the output of the adapter in the second charging mode. For example, the control unit can communicate with the electronic device (such as a smart phone), interact with the current voltage or current power of the battery in the electronic device (such as a smart phone), and adjust the output voltage or output current of the adapter based on the current voltage or current power of the battery. The communication content between the control unit and the electronic device (such as a smart phone), and the control method of the control unit over the output of the adapter in the second charging mode are described in detail below in conjunction with specific embodiments.

[0101] Optionally, in some embodiments, the wireless charging device supports a first charging mode and a second charging mode, and the wireless charging device charges the device to be charged faster in the second charging mode than in the first charging mode, and the wireless charging device performs bidirectional communication with the device to be charged to control the output power of the wireless charging device, including: performing bidirectional communication with the device to be charged to control the output power of the wireless charging device in the second charging mode.

[0102] The embodiments of the present application do not limit the specific type of the wireless charging device. For example, the wireless charging device may be a wireless charging base, or may be other types of devices that can convert electrical signals into electromagnetic waves to achieve wireless charging.

[0103] The embodiments of the present application do not specifically limit the number and type of external interfaces of the wireless charging device. In some embodiments, the wireless charging device may include an external interface, which can be used to receive charging power provided by an external device and to transmit data provided by the external device. In other embodiments, the wireless charging device may include multiple external interfaces. For example, the wireless charging device includes two external interfaces, one of which is used to connect to an electronic device, and the other is used to connect to an adapter. The external interface of the wireless charging device may include, for example, at least one of a serial port, a universal serial bus (USB), and the like. The USB interface may be, for example, a USB 2.0 interface, a USB 3.0 interface, or a TYPE-C interface.

[0104] The embodiments of the present application do not specifically limit the wireless charging method. For example, wireless charging can be performed based on at least one of magnetic coupling, magnetic resonance, and radio waves.

[0105] In some implementations, the wireless charging method may be based on a conventional wireless charging standard for wireless charging. For example, the wireless charging method may be based on one of the following standards for wireless charging: the QI standard, the A4WP standard, and the PMA standard.

[0106] The device to be charged also includes a wireless communication module, which is used to transmit the data stored in the wireless charging device or the second electronic device connected to the wireless charging device to the electronic device through a wireless link during the wireless charging process of the wireless charging device to the device to be charged, or transmit the data stored in the device to be charged to the wireless charging device or the second electronic device connected to the wireless charging device through a wireless link. The wireless charging device can have a built-in memory for storing data transmitted by the electronic device. The wireless charging device can also be connected to a second electronic device, which can be a computer, a mobile hard disk or other device with storage function. The wireless charging device can be connected to the second electronic device by wire or wirelessly (such as Bluetooth connection, WIFI connection, short-range wireless connection). The wireless communication module stores the data of the electronic device to the second electronic device via the wireless charging device.

[0107] The device to be charged and the wireless charging device can communicate through a short-range wireless communication system. Specifically, the short-range wireless communication system includes a transmitting device and a receiving device. The transmitting device and the receiving device can realize non-contact high-speed data transmission. Optionally, an extremely high frequency (EHF) antenna is encapsulated in the integrated circuit (IC) chip of the transmitting device, so that the transmitting device can realize high-speed wireless data transmission (for example, a transmission speed of up to 6GB / s) based on a high carrier frequency (for example, 60GHz). Optionally, an EHF antenna can also be encapsulated in the IC chip of the receiving device, so that two-way communication between the transmitting device and the receiving device can be achieved. Optionally, wireless data transmission is achieved between the transmitting device and the receiving device through electromagnetic signals. Among them, the transmitting device is set on the device to be charged, and the receiving device is set on the wireless charging device. It is also possible that the transmitting device is set on the wireless charging device, and the receiving device is set on the device to be charged. It is also possible that the transmitting device and the receiving device can be integrated together to enable the sending function or the receiving function in different communication situations.

[0108] It should be understood that short-range wireless communication based on high carrier frequency has the advantages of low power consumption, small size, fast transmission rate, and contactless transmission. It can also realize the function of plug-and-play module, which can greatly improve signal integrity, support more flexible system implementation, reduce standby power consumption, increase bandwidth and data transmission security, and be compatible with support for high-speed video signals.

[0109] It should be understood that the high carrier frequency can be a carrier frequency that can achieve high-speed wireless data transmission. The high carrier frequency can be a specific carrier frequency or a carrier frequency band, such as 30 GHz-300 GHz, which is not specifically limited in the embodiments of the present application.

[0110] Optionally, the high carrier frequency is 60 GHz.

[0111] Optionally, the transmitting end device includes an IC chip in which an EHF antenna is packaged.

[0112] For example, the transmitting device includes an independent transmission chip, for example, the independent transmission chip is an IC chip with an EHF antenna encapsulated inside, and the transmission power of the independent transmission chip can be a high frequency of 60GHz, thereby enabling rapid transmission of data between the transmitting device and the receiving device (e.g., a transmission speed of 6GB / s).

[0113] In some embodiments, the device to be charged performs bidirectional communication with the wireless charging device via a wireless communication module. The wireless charging device may include an adapter, and the wireless communication module is used to perform bidirectional communication with the wireless charging device to negotiate a charging mode between the adapter and the device to be charged, that is, whether the adapter and the device to be charged are in the first charging mode or the second charging mode.

[0114] The embodiment of the present application does not specifically limit the data type transmitted between the wireless charging device and the second electronic device. For example, the wireless charging device can transmit at least one of the following data: data in USB protocol format, data in DP protocol format, and data in MHL protocol format.

[0115] Furthermore, in some embodiments, the wireless charging device can be used to transmit data in multiple protocol formats with the second electronic device. For example, the wireless charging device can support the transmission of data in USB protocol format and MHL protocol format at the same time.

[0116] The embodiments of the present application do not limit the specific structure of the wireless charging device, and any circuit structure that can realize the function of the wireless charging device can be used in the embodiments of the present application. Fig. 9For example, the wireless charging device 10 may include: a control unit 121 (for example, it may be an MCU), a wireless charging unit 122 and a wireless data transmission unit 13, wherein the control unit 121 and the wireless charging unit 122 may jointly implement the functions corresponding to the wireless charging control unit 12. In addition, the wireless data transmission function of the wireless data transmission unit 13 may also be implemented under the control of the control unit 121. Furthermore, the control unit 121 may also communicate with an external device and / or interact with control information through the external interface 11. In other words, the control-related functions within the wireless charging device 10 may all be integrated into the control unit 121 and uniformly controlled by the control unit 121, but the embodiments of the present application are not limited thereto, and multiple control units may also be arranged in the wireless charging device 10, each used to implement different control functions.

[0117] Specifically, the control unit 121 can communicate with the electronic device 30 to identify the type of the electronic device 30 and determine the power level that matches the device to be charged 30. Taking the input power of the external interface 11 as an example of DC power, the wireless charging unit 122 can include devices such as a conversion circuit and a coil. The conversion circuit can be used to convert the DC power input from the external interface 11 into AC power, and the coil can be used to convert the AC power into electromagnetic waves and transmit them to the receiving end. The device to be charged communicates with the wireless charging device and sends information such as the type and power level of the device to be charged to the wireless charging device to control the output power of the wireless charging device.

[0118] Taking the second electronic device 20 as a host device, the control unit 121 as an MCU, and the wireless charging device 10 as a wireless charging base as an example, when the host device is connected to the wireless charging base through the external interface of the wireless charging base, the MCU identifies the power that the host device can provide and the type of data interaction supported by the host device (such as data in USB 2.0 format, data in USB3.0 format, image data, audio and video data, etc.). Then, the wireless charging device 10 can provide multiple power levels for the device to be charged according to the power that the host device can provide and the rules defined by the traditional wireless charging standards (such as QI or A4WP, etc.), such as low power levels (such as 5W) and medium power levels (such as 10W and / or 15W). Of course, if the host device can provide more power, the embodiment of the present application can also expand the traditional wireless charging standards (such as QI or A4WP, etc.) to provide a higher power level to the device to be charged. The device to be charged can send its own power level and control command to the wireless charging base and / or the host device so that the wireless charging base and / or the host device determine the power level.

[0119] It should be noted that the above is an example of wireless charging device 10 performing wireless charging based on traditional wireless charging standards, but the embodiments of the present application are not limited to this. The wireless charging device 10 can also perform wireless charging based on a custom private standard or protocol, such as identifying the type of electronic device according to a custom private standard or protocol, matching the power level of the device to be charged, etc.

[0120] In some implementations, the wireless charging device 10 can be connected to an adapter through the external interface 11, and wirelessly charge the device to be charged 30 according to the output power of the adapter. In other implementations, the wireless charging device 10 can be used as an adapter, that is, the function of the adapter is integrated into the wireless charging device 10. The above adapter can be a common adapter in the related art, or it can be an adapter with controllable output power provided in the embodiment of the present application.

[0121] During wireless charging, a common adapter in the related art and an adapter with controllable output power provided by an embodiment of the present application are described in detail. As mentioned above, in order to be able to apply the adapter to the field of wireless charging, the first possible implementation method is to connect the adapter to a wireless charging device, so as to wirelessly charge the electronic device based on the output power of the adapter. In this implementation method, the main function of the wireless charging device is to convert the output power of the adapter into a wireless power signal, and then transmit the wireless power signal to the electronic device. The second possible implementation method is to directly use the wireless charging device as an adapter (that is, integrate the function of the adapter into the wireless charging device) and use the output power of the wireless charging device to charge the electronic device. In this implementation method, the wireless charging device is not only responsible for converting the alternating current through operations such as transformer and rectification, but also responsible for transmitting the converted voltage and current to the electronic device in a wireless manner, thereby wirelessly charging the electronic device. The above two implementation methods are described in detail below in conjunction with specific embodiments.

[0122] Take the first implementation as an example. Fig.10 As shown, the external interface 11 can be connected to the adapter 40. When the external interface 11 is connected to the adapter 40, the wireless charging device 10 can be mainly used for wireless charging, and the wireless data transmission unit 13 can be in an idle state, or transmit some parameter information related to wireless charging.

[0123] The embodiment of the present application does not specifically limit the type of the adapter 40. For example, the adapter 40 may be a common adapter provided by the related prior art. For another example, the adapter 40 may be an adapter capable of controlling its own output power provided by the embodiment of the present application. Such adapters usually need to communicate bidirectionally with the outside world to negotiate or control the output power of the adapter.

[0124] Taking the adapter 40 as an ordinary adapter as an example, when the wireless charging device 10 recognizes that the external interface 11 is connected to the ordinary adapter, the wireless charging control unit 12 can provide one or more power levels, such as low power level (such as 5W) and medium power level (such as 10W and / or 15W), for the device to be charged based on the rules defined by the wireless charging standard (such as QI, A4WP, etc.). When the wireless charging device 10 detects an electronic device, it can communicate based on the wireless charging protocol provided by the wireless charging standard to identify the type of the electronic device and match the power level of the electronic device. Then, the wireless charging base can wirelessly charge the electronic device based on the matched power level.

[0125] Taking the adapter 40 as an example of an adapter with adjustable output power provided in the embodiment of the present application, the wireless charging control unit 12 in the wireless charging device 10 can communicate with the adapter in a two-way manner to control (or negotiate) the output power of the adapter, and wirelessly charge the electronic device 30 according to the output power of the adapter. As can be seen from the above, compared with the ordinary adapter provided by the related art, the adapter with controllable output power provided in the embodiment of the present application can provide greater output power, thereby providing a basis for fast charging in the field of wireless charging.

[0126] When the wireless charging device 10 detects that the external interface 11 is connected to the adapter, the wireless charging device 10 can communicate bidirectionally with the adapter. If the adapter can support bidirectional communication, it indicates that the adapter is an adapter with controllable output power as described above. At this time, the wireless charging control unit 12 in the wireless charging device 10 can provide one or more standard power levels, such as low power levels (such as 5W) and medium power levels (such as 10W and / or 15W), for the device to be charged based on the rules defined by the wireless charging standard (such as QI, A4WP, etc.). Alternatively, the wireless charging control unit 12 can expand the traditional wireless charging standards (such as QI, A4WP, etc.) to enable it to support higher power levels. In this way, when the wireless charging device 10 detects that the external interface 11 is connected to an adapter with controllable output power, a higher power level can be provided for the device to be charged.

[0127] Optionally, in some embodiments, the wireless charging device 10 can perform bidirectional communication with the device to be charged in accordance with the bidirectional communication protocol provided in the embodiment of the present application (see the bidirectional communication process and instruction set between the adapter and the device to be charged described above for details) to provide a medium power level or even a higher power level.

[0128] Taking the wireless charging device 10 as an example of a wireless charging base, when the device to be charged is connected to the wireless charging base, the wireless charging base can perform two-way communication with the device to be charged according to the two-way communication protocol provided in the embodiment of the present application to identify the type of the device to be charged and perform power matching on the device to be charged. Then, the wireless charging base can wirelessly charge the device to be charged based on the matched power. It should be noted that the power matching process can include current matching and voltage matching. Taking the matching power equal to 10W as an example, the voltage and current can be 5V and 2A respectively, or the voltage and current can be 10V and 1A respectively.

[0129] It should be noted that the embodiments of the present application do not specifically limit the content of the communication between the wireless charging control unit 12 and the adapter, as long as the purpose of controlling or negotiating the output power of the adapter can be achieved. The following is an example of the communication content between the adapter and the wireless charging control unit 12 in conjunction with a specific embodiment.

[0130] Optionally, in some embodiments, the adapter 40 is an adapter that supports a first charging mode and a second charging mode, and the adapter 40 charges the electronic device 30 faster in the second charging mode than in the first charging mode. The above-mentioned two-way communication with the adapter 40 to control the output power of the adapter 40 may include: performing two-way communication with the adapter 40 to control the output power of the adapter 40 in the second charging mode.

[0131] It should be noted that the output power of the adapter 40 in the second charging mode can be actively determined by the wireless charging device 10; or, it can be determined by the wireless charging device 10 with reference to the state or capability of the terminal to be charged; or, it can be determined by the device to be charged 30. In this case, the wireless charging device 10 is mainly responsible for the transmission of information or instructions between the adapter 40 and the device to be charged 30.

[0132] Optionally, in some embodiments, the wireless charging control unit 12 may directly communicate bidirectionally with the adapter 40 to negotiate or control the output power of the adapter in the second charging mode. For example, the wireless charging control unit 12 may communicate bidirectionally with the adapter 40 using the bidirectional communication protocol provided in the embodiment of the present application (see the bidirectional communication process and instruction set between the adapter and the electronic device described above).

[0133] Optionally, in some embodiments, performing bidirectional communication with the adapter 40 to control the output power of the adapter 40 in the second charging mode may include: performing bidirectional communication with the adapter 40 to negotiate the charging mode of the adapter 40 .

[0134] For example, the adapter 40 may send a first instruction to the wireless charging control unit 12 to inquire whether the wireless charging control unit 12 turns on the second charging mode; the wireless charging control unit 12 sends a reply instruction to the first instruction to the adapter, and the reply instruction to the first instruction is used to indicate whether the wireless charging control unit 12 agrees to turn on the second charging mode. If the reply instruction to the first instruction indicates that the wireless charging control unit 12 agrees to turn on the second charging mode, the adapter turns on the second charging mode.

[0135] The embodiment of the present application does not specifically limit the manner in which the wireless charging control unit 12 determines whether to enable the second charging mode. For example, the wireless charging control unit 12 may directly agree to enable the second charging mode; for another example, the wireless charging control unit 12 may send a first instruction to the electronic device 30, and the device to be charged 30 may decide whether to enable the second charging mode; for another example, the wireless charging control unit 12 may determine whether to enable the second charging mode based on the status of the device to be charged 30 (such as whether the device to be charged supports the second charging mode, and / or the current power level of the device to be charged, etc.).

[0136] Optionally, in some embodiments, performing bidirectional communication with the adapter 40 to control the output power of the adapter 40 in the second charging mode may include: performing bidirectional communication with the adapter 40 to control the output voltage of the adapter in the second charging mode.

[0137] For example, the adapter 40 can send a second instruction to the wireless charging control unit 12, inquiring whether the current output voltage of the wireless charging control unit 12 is appropriate; the wireless charging control unit 12 can send a reply instruction of the second instruction to the adapter 40, and the reply instruction of the second instruction is used to check whether the current output voltage of the adapter 40 is appropriate, high or low, so that the adapter 40 can adjust its own output voltage according to the reply instruction of the second instruction.

[0138] The embodiment of the present application does not specifically limit the manner in which the wireless charging control unit 12 determines the output voltage of the adapter in the second charging mode. Optionally, in some embodiments, the wireless charging control unit 12 may actively determine the output voltage of the adapter in the second charging mode. For example, after the wireless charging control unit 12 identifies that the adapter is an adapter with controllable output power, it directly adjusts the output voltage of the adapter 40 to a preset higher level. Optionally, in other embodiments, the wireless charging control unit 12 may communicate with the device to be charged 30, and control the output voltage of the adapter in the second charging mode based on feedback information from the device to be charged 30.

[0139] Optionally, in some embodiments, performing bidirectional communication with the adapter to control the output power of the adapter in the second charging mode may include: performing bidirectional communication with the adapter to control the output current of the adapter in the second charging mode.

[0140] For example, the adapter 40 may send a third instruction to the wireless charging control unit 12, inquiring the wireless charging control unit 12 about the current value of the output current of the adapter, or the maximum charging current supported by the wireless charging device; the wireless charging control unit 12 may send a reply instruction of the third instruction to the adapter 40, and the reply instruction of the third instruction is used to indicate the current value of the output current of the adapter, or the maximum charging current supported by the wireless charging device, so that the adapter 40 adjusts its own output current according to the reply instruction of the third instruction.

[0141] The embodiment of the present application does not specifically limit the manner in which the wireless charging control unit 12 determines the output current of the adapter in the second charging mode. Optionally, in some embodiments, the wireless charging control unit 12 may actively control the output current of the adapter in the second charging mode. For example, after the wireless charging control unit 12 identifies that the adapter is an adapter with controllable output power, it directly adjusts the output current of the adapter to a preset higher level. Optionally, in other embodiments, the wireless charging control unit 12 may communicate with the device to be charged 30, and control the output current of the adapter in the second charging mode based on feedback information from the device to be charged 30.

[0142] It should be noted that the embodiment of the present application does not specifically limit the process of the wireless charging control unit 12 wirelessly charging the device 30 to be charged according to the output power of the adapter 40. In some embodiments, the wireless charging protocol provided by the traditional wireless charging standard (such as QI or A4WP) can be used to wirelessly charge the electronic device 30. In other implementations, the two-way communication protocol provided by the embodiment of the present application (see the two-way communication process and instruction set between the adapter and the electronic device described above) can be used to wirelessly charge the device 30 to be charged.

[0143] Specifically, the above-mentioned wireless charging of the device to be charged 30 according to the output power of the adapter 40 may include: performing two-way communication with the device to be charged 30 to inquire whether the device to be charged 30 agrees to start the second charging mode; if the device to be charged 0 agrees to start the second charging mode, wireless charging of the device to be charged 30 is performed according to the output power of the adapter 40 in the second charging mode.

[0144] The communication process of the traditional wireless charging process only includes the identification of the electronic device and the power level confirmation process. The embodiment of the present application is based on a customized two-way communication protocol. First, the type of electronic device is identified (that is, whether the electronic device is an adapter that supports the second charging mode). The two-way communication protocol provided by the embodiment of the present application is applied to the field of wireless charging, providing a basis for fast charging in the field of wireless charging.

[0145] Optionally, in some embodiments, the wireless charging control unit 12 can also be used to perform bidirectional communication with the device to be charged 30 to adjust the output power of the wireless charging control unit 12 during the process of the wireless charging control unit 12 wirelessly charging the device to be charged 30 according to the output power of the adapter 40.

[0146] In the traditional wireless charging process, after completing the power matching of the electronic device, the output power of the wireless charging control cannot be adjusted. The embodiment of the present application modifies the communication protocol between the wireless charging control unit 12 and the device to be charged 30. In the wireless charging control, two-way communication between the wireless charging control unit 12 and the device to be charged 30 is maintained, so that the output power of the wireless charging control unit 12 can be adjusted in real time according to actual needs, thereby improving the flexibility of the wireless charging process.

[0147] Taking the second implementation method (i.e., the wireless charging device 10 directly serves as an adapter) as an example, the wireless charging control unit 12 can also be used to receive alternating current; convert the input power of the alternating current into the output power of the wireless charging device 10; and wirelessly charge the device 30 to be charged according to the output power of the wireless charging device 10.

[0148] Integrating the function of the adapter into the wireless charging device can reduce the number of devices or apparatuses that need to be connected during the wireless charging process and simplify the implementation.

[0149] It should be understood that the function of an ordinary adapter can be integrated into the wireless charging device 10, and the function of an adapter with adjustable output power provided in the embodiment of the present application can also be integrated into the wireless charging device 10. Taking the integration of the function of the adapter with adjustable output power provided in the embodiment of the present application in the wireless charging device 10 as an example, the wireless charging device 10 can communicate bidirectionally with the device to be charged, thereby controlling the output power of the wireless charging device 10. The bidirectional communication mechanism between the wireless charging device 10 and the device to be charged can adopt a communication mechanism similar to the bidirectional communication mechanism between the adapter with adjustable output power and the electronic device in the wired charging process (see above for details), except that the charging power between the wireless charging device 10 and the device to be charged is transmitted wirelessly. The communication mechanism and charging control method between the wireless charging device 10 and the device to be charged are described in detail below in conjunction with specific embodiments.

[0150] Optionally, in some embodiments, the wireless charging device 10 may support a first charging mode and a second charging mode, and the charging speed of the wireless charging device 10 for the device to be charged 30 in the second charging mode is faster than the charging speed of the wireless charging device 10 for the device to be charged 30 in the first charging mode, and performing two-way communication with the device to be charged 30 to control the output power of the wireless charging device 10 may include: performing two-way communication with the device to be charged 30 to control the output power of the wireless charging device 10 in the second charging mode.

[0151] Optionally, in some embodiments, performing bidirectional communication with the device to be charged 30 to control the output power of the wireless charging apparatus 10 in the second charging mode may include: performing bidirectional communication with the device to be charged 30 to negotiate the charging mode of the wireless charging apparatus 10 .

[0152] Optionally, in some embodiments, performing bidirectional communication with the device to be charged 30 to control the output power of the wireless charging apparatus 10 in the second charging mode may include: performing bidirectional communication with the device to be charged 30 to control the output voltage of the wireless charging apparatus 10 in the second charging mode.

[0153] Optionally, in some embodiments, performing bidirectional communication with the device to be charged 30 to control the output power of the wireless charging apparatus 10 in the second charging mode may include: performing bidirectional communication with the device to be charged 30 to control the output current of the wireless charging apparatus 10 in the second charging mode.

[0154] The functions of the wireless charging device 10 are described in detail above in combination with different embodiments, but the various embodiments of the present application are independent of each other.

[0155] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0156] The wireless charging coil, wireless charging assembly and electronic device provided in the embodiments of the present application are introduced in detail above. The principles and implementation methods of the present application are described in detail using specific examples herein. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A wireless charging component, characterized in that: include: A wireless charging coil, the wireless charging coil comprising at least two turns of metal wire, the upper surface of any one of the at least two turns of metal wire being in the same plane; the wireless charging coil comprising a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, and the second connection end is arranged at an edge of the wireless charging coil; A circuit board, the circuit board comprising a first connection point and a second connection point arranged on a surface of the circuit board, the first connection point being directly electrically connected to the first connection end, the second connection point being electrically connected to the second connection end, the first connection point and the second connection point being used to electrically connect a wireless charging circuit; The circuit board further comprises an insulating layer arranged on the surface, a first notch is arranged in the middle of the insulating layer, and the first connection point is arranged in the first notch; The circuit board also includes a wiring layer arranged in the middle, one end of a first wiring in the wiring layer is electrically connected to a first connection point in the notch, and the other end of the first wiring is electrically connected to the second connection point respectively to the wireless charging circuit; A second notch is provided in the middle of the insulating layer, and the second connection point is provided in the second notch; The wiring layer further includes a second wiring, one end of the second wiring is electrically connected to a second connection point in the second notch, and the other end of the first wiring and the other end of the second wiring are electrically connected to a wireless charging circuit respectively; The first routing line includes a first routing line section and a second routing line section. The projection of the first routing line section on the circuit board is within the wireless charging coil, the projection of the second routing line section on the circuit board is outside the wireless charging coil, and the second routing line section is arranged adjacent to the second routing line.

2. The wireless charging assembly according to claim 1, characterized in that: The first routing line divides the circuit board into at least two areas. The circuit board also includes a functional module. The functional module includes a plurality of components. The plurality of components are arranged in the same area.

3. The wireless charging assembly according to claim 1, characterized in that: The first connection point is a soldering pad, and the first connection point is connected to the first connection end by welding; and / or The second connection point is a soldering pad, and the second connection point is connected to the second connection end by welding.

4. The wireless charging assembly according to claim 1, characterized in that: A gap is provided between two adjacent circles of the at least two circles of metal wire, and a non-conductive material is provided in the gap.

5. The wireless charging assembly according to claim 1, characterized in that: The wireless charging coil includes at least two turns of conductive wires, the conductive wires include metal wires and a protective layer wrapping the metal wires, the protective layer is made of non-conductive material, and the upper surface of any one of the at least two turns of conductive wires is in the same plane.

6. The wireless charging assembly according to claim 5, characterized in that: Two adjacent turns of the at least two turns of the conductive wire are arranged at intervals.

7. The wireless charging assembly according to claim 5, characterized in that: A circle of wire with the smallest radius in the wireless charging coil forms an accommodation area, and the first connecting end is arranged in the accommodation area.

8. An electronic device, characterized in that: It comprises a housing and a wireless charging component, wherein the wireless charging component is arranged in the housing, and the wireless charging component comprises a wireless charging coil and a circuit board; The wireless charging coil comprises a first connection end and a second connection end, wherein the first connection end is arranged in the middle of the wireless charging coil, and the second connection end is arranged at the edge of the wireless charging coil; The circuit board includes a first connection point and a second connection point arranged on a surface of the circuit board, the first connection point is directly electrically connected to the first connection end, the second connection point is electrically connected to the second connection end, and the first connection point and the second connection point are used to electrically connect the wireless charging circuit; The circuit board further comprises an insulating layer arranged on the surface, a first notch is arranged in the middle of the insulating layer, and the first connection point is arranged in the first notch; The circuit board also includes a wiring layer arranged in the middle, one end of a first wiring in the wiring layer is electrically connected to a first connection point in the notch, and the other end of the first wiring is electrically connected to the second connection point respectively to the wireless charging circuit; A second notch is provided in the middle of the insulating layer, and the second connection point is provided in the second notch; The wiring layer further includes a second wiring, one end of the second wiring is electrically connected to a second connection point in the second notch, and the other end of the first wiring and the other end of the second wiring are electrically connected to a wireless charging circuit respectively; The first routing line includes a first routing line section and a second routing line section. The projection of the first routing line section on the circuit board is within the wireless charging coil, the projection of the second routing line section on the circuit board is outside the wireless charging coil, and the second routing line section is arranged adjacent to the second routing line.

9. The electronic device according to claim 8, characterized in that: The electronic device also includes a battery, the wireless charging component is electrically connected to the battery, and the wireless charging component is used to charge the battery.

10. The electronic device according to claim 8, characterized in that: The electronic device further comprises a control module, and the control module is used to control the wireless charging coil to convert electrical energy into electromagnetic energy and transmit it.

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