Wireless charging receiver and electronic equipment thereof

Abstract

The utility model relates to a wireless charging receiver and an electronic device thereof, the wireless charging receiver comprises a coil unit, a magnetic substrate and a connecting unit, the coil unit comprises a coil wound into a conductive pattern, and two ends of the coil respectively form a first connecting terminal and a second connecting terminal; the coil is arranged on the top surface of the magnetic substrate, the connecting unit comprises a first printed circuit board and a second printed circuit board, the first connecting terminal is connected with the first printed circuit board, and the second connecting terminal is connected with the second printed circuit board; a first groove matched with the first printed circuit board in shape and a second groove matched with the second printed circuit board in shape are further formed in the magnetic substrate. Compared with the prior art, the wireless power receiver has the advantages that the thickness of the wireless power receiver is reduced, the shielding property and the performance are improved, and the like.

Description

Technical Field

[0001] This utility model relates to the field of wireless power transmission technology, and in particular to a wireless charging receiver and its electronic device. Background Technology

[0002] Wireless power transfer, or wireless energy transfer, refers to the technology of wirelessly transmitting electrical energy to desired devices. In the 17th century, electric motors and transformers utilizing the principle of electromagnetic induction were widely used. Later, a method was proposed to transmit electrical energy by radiating electromagnetic waves such as radio waves or lasers. In fact, everyday electric toothbrushes and electric shavers use the principle of electromagnetic induction for charging. Electromagnetic induction refers to the generation of current through induced voltage when the magnetic field around a conductor changes. Electromagnetic induction schemes have been successfully commercialized for small electronic devices, but they suffer from the problem of short power transmission distances.

[0003] Besides electromagnetic induction, long-distance transmission using resonant and shortwave radio frequency has been proposed as a wireless power transfer solution. However, the wireless power receiver installed in the terminal has relatively high requirements for thickness. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art by providing a wireless charging receiver and its electronic device, which can reduce the thickness of the wireless power receiver and ensure shielding.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A wireless charging receiver includes a coil unit, a magnetic substrate, and a connection unit. The coil unit includes a coil wound in a conductive pattern, with a first connection terminal and a second connection terminal formed at both ends of the coil. The coil is disposed on the top surface of the magnetic substrate. The connection unit includes a first printed circuit board and a second printed circuit board, with the first connection terminal connected to the first printed circuit board and the second connection terminal connected to the second printed circuit board.

[0007] The magnetic substrate also forms a first groove that matches the shape of the first printed circuit board and a second groove that matches the shape of the second printed circuit board.

[0008] Furthermore, both the first and second printed circuit boards are rectangular structures, and both the first and second grooves are rectangular; one end of the first printed circuit board is connected to the first connection terminal, and the other end extends out along the first groove; one end of the second printed circuit board is connected to the second connection terminal, and the other end extends out along the second groove.

[0009] Furthermore, the first groove and the second groove are parallel to each other.

[0010] Furthermore, the coil is formed by winding a conductive wire into a conductive pattern, the conductive pattern being spiral-shaped.

[0011] Furthermore, the coil is formed by etching.

[0012] Furthermore, the coil is a conductor, which is a metal or alloy.

[0013] Furthermore, the magnetic substrate is a soft magnetic material, which is ferrite, nanocrystal, or iron-silicon-aluminum.

[0014] Furthermore, the length of the magnetic substrate is between 40mm and 60mm, and the width is between 40mm and 60mm.

[0015] Furthermore, the first connection terminal is connected to the first printed circuit board via solder, and the second connection terminal is connected to the second printed circuit board via solder.

[0016] This utility model also provides an electronic device, including a wireless charging receiver as described above; the electronic device is a mobile phone.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) On the one hand, this utility model significantly reduces the thickness of the wireless power receiver by directly placing the coil unit on the top surface of the magnetic substrate; on the other hand, it uses a slot on the magnetic substrate to place the connection unit. The magnetic substrate can prevent other metal materials from affecting the coil and play a shielding role. If the magnetic substrate is opened, some shielding will be lost. This solution can ensure the normal connection between the coil and the printed circuit board (FPC) without opening, and also ensure the shielding of the magnetic substrate.

[0019] (2) The present invention sets the connection unit as two printed circuit boards, which eliminates the substrate without the line part, improves the economy, and the corresponding slotted area of ​​the magnetic substrate is also reduced, which improves the shielding and performance.

[0020] (3) The coil of this utility model can be a coil composed of N strands of copper wire wound together, or a coil with a more complex shape can be made by etching, addition, laser, or die cutting.

[0021] Soft magnetic materials are not limited to ferrites, nanocrystals, iron-silicon-aluminum and other magnetic materials, and come in a variety of forms. Attached Figure Description

[0022] Figure 1 This is a perspective view of a wireless power receiver provided in an embodiment of the present utility model;

[0023] Figure 2 This is a head-up view of a wireless power receiver provided in an embodiment of this utility model;

[0024] Figure 3 This is an exploded perspective view of a wireless power receiver provided in an embodiment of this utility model;

[0025] In the figure, 100 is a coil unit, 110 is a first connecting terminal, 120 is a second connecting terminal, 130 is a coil, 200 is a magnetic substrate, 210 is a first groove, 220 is a second groove, 300 is a connecting unit, 310 is a first printed connecting terminal, 320 is a first printed circuit board, 330 is a second printed connecting terminal, and 340 is a second printed circuit board. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] Example 1

[0033] like Figures 1-3 As shown, this embodiment provides a wireless charging receiver that can wirelessly receive power from the transmission side using electromagnetic induction. It includes a coil unit 100, a magnetic substrate 200, and a connection unit 300. The coil unit 100 includes a coil 130 wound in a conductive pattern, with a first connection terminal 110 and a second connection terminal 120 formed at both ends of the coil 130. The coil 130 is disposed on the top surface of the magnetic substrate 200. The connection unit 300 includes a first printed circuit board 320 and a second printed circuit board 340. The first connection terminal 110 is connected to the first printed circuit board 320, and the second connection terminal 120 is connected to the second printed circuit board 340.

[0034] The magnetic substrate 200 also forms a first groove 210 that matches the shape of the first printed circuit board 320 and a second groove 220 that matches the shape of the second printed circuit board 340.

[0035] Preferably, both the first printed circuit board 320 and the second printed circuit board 340 are rectangular structures, and both the first groove 210 and the second groove 220 are rectangular. One end of the first printed circuit board 320 is connected to the first connecting terminal 110, and the other end extends along the first groove 210. One end of the second printed circuit board 340 is connected to the second connecting terminal 120, and the other end extends along the second groove 220.

[0036] The first groove 210 and the second groove 220 are parallel to each other.

[0037] On the one hand, the installation connection unit of this solution does not make holes in the magnetic substrate, which can ensure the normal connection between the coil and the FPC and also ensure the shielding of the magnetic plate. On the other hand, this solution sets the connection unit as two printed circuit boards, converting the conventional one FPC into two FPCs, eliminating the substrate without circuit parts, improving economy, and the corresponding slotted area of ​​the magnetic plate is also reduced, improving shielding and performance.

[0038] Specifically, the coil unit 100 may include a first connection terminal 110, a second connection terminal 120, and a coil 130. The coil 130 may be formed as a conductive pattern, such as a conductive layer. The first connection terminal 110 is located at one end of the coil 130, and the second connection terminal 120 is disposed at the other end of the coil 130. The first connection terminal 110 and the second connection terminal 120 are necessary for connection with the connection unit 300.

[0039] The coil 130 can be formed into a conductive pattern obtained by repeatedly winding wires. When viewed from above, the coil pattern can have a spiral shape. However, the examples are not limited to this, and various patterns can be formed. In this embodiment, the coil is formed by winding N strands (N≥2) of copper wires in a spiral pattern. Coils with more complex shapes can also be made using etching, addition, laser, or die-cutting methods. The coil unit 100 can be directly disposed on the top surface of the magnetic substrate 200, or an adhesive layer can be disposed between the coil unit 100 and the magnetic substrate 200. The coil unit 100 may include a conductor. The conductor may include metal or alloy.

[0040] The magnetic substrate 200 can change the direction of the magnetic field received from the transmission side. The magnetic substrate 200 can reduce the amount of magnetic field leaking to the outside by changing the direction of the magnetic field received from the transmission side. Specifically, the magnetic substrate 200 changes the direction of the magnetic field transmitted from the transmission side to the lateral direction, so that the magnetic field can be more concentrated on the coil unit 100. The magnetic substrate 200 can absorb some of the magnetic field received from the transmission side and leaking to the outside, thus dissipating the magnetic field as heat. Reducing the amount of magnetic field leaking outward can reduce the adverse effects of the magnetic field on the human body. The magnetic substrate 200 can be fabricated in sheet form and can be flexible.

[0041] The magnetic substrate material is a nanocrystalline soft magnetic material, with dimensions ranging from 40mm x 40mm to 60mm x 60mm. Soft magnetic materials are not limited to ferrite, nanocrystalline, or iron-silicon-aluminum magnetic materials.

[0042] The connection unit 300 may include a first printed connection terminal 310, a first printed circuit board 320, a second printed connection terminal 330, and a second printed circuit board 340. The connection between the coil unit 100 and the connection unit 300 is achieved via solder. Specifically, the first connection terminal 110 of the coil unit 100 is connected to the first printed connection terminal 310 of the connection unit 300 via solder, and the second connection terminal 120 of the coil unit 100 is connected to the second printed connection terminal 330 of the connection unit 300 via solder. The first printed circuit board 320 and the second printed circuit board 340 may include wiring layers.

[0043] The number of independent flexible circuit boards in the connection unit 300 must be greater than or equal to 2 sets.

[0044] The connection unit 300 connects the wireless power receiving circuit to the coil unit 100 to transmit power received from the coil unit 100 to the load via the wireless power receiving circuit. The wireless power receiving circuit may include a rectifier circuit for converting alternating current to direct current and a smoothing circuit for transmitting the direct current to the load after removing ripple components from the direct current.

[0045] In the wireless power receiver, the coil unit 100 is directly disposed on the top surface of the magnetic substrate 200, so the overall thickness can be significantly reduced by a flexible board compared to the case where the coil pattern is formed thereon.

[0046] The magnetic substrate has a pre-formed receiving space corresponding to the shape of a connection unit for connecting a wireless power receiving circuit; the receiving space on the magnetic substrate is located on the top surface of the magnetic substrate and its height is less than the thickness of the magnetic substrate. The connection unit is disposed in the receiving space and connected to the coil signal processing unit.

[0047] like Figure 3 As shown, the magnetic substrate 200 has a receiving space with the same structure as the connecting unit 300. The receiving space includes a first groove 210 that matches the shape of the first printed circuit board 320 and a second groove 220 that matches the shape of the second printed circuit board 340. Since the connecting unit 300 is disposed in the receiving space 210 of the magnetic substrate 200, the connecting unit 300 can be disposed below the coil unit 100, and the thickness of the wireless power receiver is significantly reduced, which can significantly reduce the number of devices such as portable terminals equipped with wireless power receivers.

[0048] Example 2

[0049] This embodiment provides an electronic device, including a wireless charging receiver as described in Embodiment 1; the electronic device is a mobile phone, such as a cellular phone, PCS (Personal Communications Service) phone, GSM phone, CDMA-2000 phone or WCDMA phone, PMP (Portable Multimedia Player), PDA (Personal Digital Assistant), smartphone or MBS (Mobile Broadcasting System) phone, but the examples are not limited to these. If various devices can wirelessly receive power, they can be used as terminals.

[0050] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A wireless charging receiver, comprising: The coil unit (100) includes a coil (130) wound as a conductive pattern, both ends of the coil (130) form a first connection terminal (110) and a second connection terminal (120) respectively; the coil (130) is arranged on the top surface of the magnetic substrate (200), the connection unit (300) includes a first printed circuit board (320) and a second printed circuit board (340), the first connection terminal (110) is connected to the first printed circuit board (320), and the second connection terminal (120) is connected to the second printed circuit board (340). The magnetic substrate (200) further forms a first groove (210) matched with the shape of the first printed circuit board (320) and a second groove (220) matched with the shape of the second printed circuit board (340) respectively.

2. The wireless charging receiver of claim 1, wherein, The first printed circuit board (320) and the second printed circuit board (340) are both rectangular structures, the first groove (210) and the second groove (220) are both rectangular; one end of the first printed circuit board (320) is connected to the first connection terminal (110), and the other end extends along the first groove (210); one end of the second printed circuit board (340) is connected to the second connection terminal (120), and the other end extends along the second groove (220).

3. The wireless charging receiver of claim 2, wherein, The first groove (210) and the second groove (220) are parallel to each other.

4. The wireless charging receiver of claim 1, wherein, The coil (130) is formed by winding a wire into a conductive pattern, and the conductive pattern is spiral-shaped.

5. The wireless charging receiver of claim 1, wherein, The coil (130) is formed by etching.

6. The wireless charging receiver of claim 1, wherein, The coil (130) is a conductor, which is metal or alloy.

7. The wireless charging receiver of claim 1, wherein, The magnetic substrate (200) is a soft magnetic material, which is ferrite, nanocrystalline or iron-silicon-aluminum.

8. The wireless charging receiver of claim 7, wherein, The length of the magnetic substrate (200) is between 40mm and 60mm, and the width is between 40mm and 60mm.

9. The wireless charging receiver of claim 1, wherein, The first connection terminal (110) is connected to the first printed circuit board (320) by solder, and the second connection terminal (120) is connected to the second printed circuit board (340) by solder.

10. An electronic device, comprising: The electronic device is a mobile phone. The electronic device is a mobile phone.

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