WO2013097334A1

WO2013097334A1 - Apparatus, system and mobile terminal for wireless charging

Info

Publication number: WO2013097334A1
Application number: PCT/CN2012/071533
Authority: WO
Inventors: 顾云峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-12-30
Filing date: 2012-02-23
Publication date: 2013-07-04
Also published as: CN102545326A

Abstract

Disclosed in the present invention are a wireless charging apparatus, a mobile terminal supporting wireless charging and a wireless charging system, the wireless charging apparatus comprises a charging base. The charging base is configured with a transmitting circuit, a transmitting coil, a movable daughter board and positioning magnet. The transmitting coil connects with the transmitting circuit through conducting wires, and the positioning magnet is fixed on the daughter board in the form of being located inside the transmitting coil. When wirelessly charging the mobile terminal by using the present invention, the position of the mobile terminal need not be changed, it can just be placed everywhere on the charging base of the wireless charging apparatus, when wireless charging is not in demand, the daughter board is fixed near the transmitting circuit and cannot be moved freely. By utilizing the present invention, it is convenient to charge the mobile terminal using the wireless charging apparatus, and the user experience of using wireless charging is enhanced at the same time.

Description

Wireless charging device and system, mobile terminal

The present invention relates to a mobile terminal charging technology, and more particularly to a wireless charging device, a mobile terminal supporting wireless charging, and a wireless charging system. Background technique

At present, mobile terminals support more and more powerful functions, and their applications are more and more widely used. Mobile terminals can be used as entertainment tools for users, such as listening to songs, watching TV programs, surfing the Internet, etc. through mobile terminals. In the process of using the mobile terminal, due to the limitation of the battery capacity, the power is quickly used up, so it is necessary to frequently charge the battery of the mobile terminal.

The emergence of wireless charging technology represented by electromagnetic induction has brought convenience to consumers. The wireless charging device can conveniently charge the mobile phone, freeing the user from the shackles of the charging cable. However, when the battery is charged using the wireless charging function, there is a problem of inconvenient use, which also affects the user experience. Summary of the invention

In view of this, the main objective of the present invention is to provide a wireless charging device, a mobile terminal supporting wireless charging, and a wireless charging system, which can provide a better wireless charging effect for the mobile terminal and can provide an excellent user experience. .

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A wireless charging device includes a charging base, wherein the charging base is provided with a transmitting circuit, a transmitting coil, a movable sub-board that fixes the transmitting coil, and a positioning magnet, and the transmitting coil is connected to the transmitting circuit by a wire, A positioning magnet is fixed to the daughter board in a manner of being located inside the transmitting coil. Preferably, the positioning magnet is fixed to the daughter board in a manner of being located at the center of the transmitting coil.

Preferably, the wireless charging device further includes a return magnet disposed near the transmitting circuit, a magnetic field strength of the return magnet is less than a magnetic field strength of the positioning magnet, and the return magnet and the positioning magnet Set in a way that is attractive to each other.

Preferably, the bottom of the sub-board is provided with balls and/or rollers, and the sub-boards are freely movable in the charging base by the balls and/or rollers.

Preferably, the wire is a flexible wire, and the length of the wire supports that the daughterboard can be moved to any position in the charging base.

a mobile terminal supporting wireless charging, wherein the mobile terminal is provided with a receiving coil and a positioning magnet; wherein the receiving coil is positioned on the mobile terminal, and the positioning magnet is located in the receiving coil Fixed to the mobile terminal.

Preferably, the positioning magnet is fixed to the mobile terminal in a manner to be located at the center of the receiving coil.

A wireless charging system, comprising the aforementioned wireless charging device, and the aforementioned wireless terminal supporting wireless charging.

Preferably, the magnetic field strength of the positioning magnet fixed to the mobile terminal is greater than the magnetic field strength of the return magnet.

Preferably, the magnetic field strength of the positioning magnet fixed to the mobile terminal is equivalent to the magnetic field strength of the positioning magnet fixed to the sub-board and is provided in a mutually attractive manner.

The charging base of the wireless charging device of the present invention is provided with a transmitting circuit, a transmitting coil, a movable sub-board for fixing the transmitting coil, and a positioning magnet. The transmitting coil is connected to the transmitting circuit through a wire, and the positioning magnet is fixed to the transmitting coil in a manner of being located in the transmitting coil. The mobile terminal is provided with a receiving coil and a positioning magnet; wherein the receiving coil is positioned on the mobile terminal, and the positioning magnet is fixed on the mobile terminal in a manner of being located in the receiving coil. Thus, when charging the mobile terminal, As long as the mobile terminal is placed on the charging base of the wireless charging device of the present invention, the mutual attraction between the positioning magnet on the mobile terminal and the positioning magnet fixed on the daughter board, the receiving coil in the mobile terminal and the wireless charging device The transmitting coils are coupled to each other to achieve an optimal charging effect for the mobile terminal. When the mobile terminal wirelessly charges the mobile terminal, the mobile terminal does not need to be displaced, but is only placed on the charging base of the wireless charging device, and can be placed arbitrarily; and when there is no wireless charging, the daughter board is fixed and transmitted. Near the circuit, you can't move around. The invention not only facilitates charging the mobile terminal by using the wireless charging device, but also improves the experience effect of using the wireless charging user. DRAWINGS

Figure 1 is a block diagram of wireless charging implementation;

2 is a schematic structural diagram of a wireless charging apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a structure of a mobile terminal according to an embodiment of the present invention. detailed description

The basic idea of the present invention is: a charging base of a wireless charging device is provided with a transmitting circuit, a transmitting coil, a movable sub-board of a fixed transmitting coil, and a positioning magnet, and the transmitting coil is connected to the transmitting circuit through a wire, and the positioning magnet is located in the transmitting coil. The method is fixed on the sub-board; and the mobile terminal is provided with a receiving coil and a positioning magnet; wherein the receiving coil is positioned on the mobile terminal, and the positioning magnet is fixed on the mobile terminal in a manner of being located in the receiving coil.

The present invention will be further described in detail below with reference to the accompanying drawings.

The wireless charging technology represented by electromagnetic induction is the current mainstream wireless charging technology. Figure 1 is a block diagram of wireless charging implementation. The basic structure of the wireless charging technology is shown in Figure 1. It is mainly divided into two parts, one is the transmitting end, also It is called the transmitting base, that is, the charging base; one is the receiving terminal, and the transmission between the transmitting end and the receiving terminal is realized by the induction coil. Transmitter and external power supply Connected, is the input end of the energy, the transmitting end has a transmitting coil; the receiving terminal is a mobile terminal that needs to be charged, and the receiving terminal has a receiving coil. When the transmitting coil and the receiving coil are facing each other, the magnetic flux coupling is optimal and the charging efficiency is maximum. In order to achieve the best coupling effect between the transmitting coil and the receiving coil between the charging base and the mobile terminal, the current wireless charging device places a magnet as a core in the middle of the transmitting end, fixes the transmitting coil on the transmitting base, and causes the magnet to be transmitted. The center of the coil; Similarly, a small magnet is placed at the receiving end. When wirelessly charging, the receiving terminal is placed on the charging base, and the magnet at the receiving end and the magnet on the charging base attract each other to move on the charging base. The terminal is attracted to the mobile terminal by the magnet fixed on the charging base, so that the transmitting coil and the receiving coil reach the optimal coupling position, thereby improving the transmission efficiency of the wireless charging.

Although the charging method shown in FIG. 1 can implement wireless charging of the mobile terminal, the following problems exist: During the charging process, the mobile terminal is attracted to the middle of the charging base, and during use, the user finds the mobile terminal. There is a significant shifting process, which may cause physical damage to the mobile terminal and affect the user experience. In addition, when the mass of the mobile terminal is large, if the magnet on the charging base cannot attract the mobile terminal to the middle of the base , will result in low charging efficiency, and if the alignment of the receiving coil and the transmitting coil is realized by human means, there will be obvious human error.

The wireless charging system proposed by the present invention still includes two parts: one is a mobile terminal, and the other is a wireless charging device. Their respective constituent structures are described in detail below.

2 is a schematic structural diagram of a wireless charging device according to an embodiment of the present invention. As shown in FIG. 2, a wireless charging device according to an embodiment of the present invention includes a charging base 20, and the charging base 20 is provided with a transmitting circuit 26, a transmitting coil 21, a movable sub-board 22 fixing the transmitting coil 21, and a positioning magnet 23, the transmitting coil 21 being connected to the transmitting circuit 26 by a wire, the positioning magnet 23 being located at the transmitting coil 21 The inner mode is fixed to the sub-board 22. Specifically, the positioning magnet 23 is fixed to the sub-board 22 so as to be located at the center of the transmitting coil 21.

The wireless charging device shown in FIG. 1 further includes a return magnet 25 disposed in the vicinity of the transmitting circuit 26, the magnetic field strength of the return magnet 25 is smaller than the magnetic field strength of the positioning magnet 23, and the return magnet 25 The positioning magnets 23 are disposed in such a manner as to attract each other. The return magnet 25 is disposed such that the sub-plate 22 is attracted to the return magnet 25 by the return magnet 25 in the uncharged state, thereby realizing the fixing of the sub-board 22, thereby making the wireless charging device of the present invention The structure is more stable.

The bottom of the sub-board 22 is provided with balls and/or rollers, and the sub-boards 22 are freely movable in the charging base 20 by the balls and/or rollers. In the present invention, the structure in which the sub-board 22 is freely movable in the charging base 20 is not limited, and the sub-board 22 may be coupled to the bottom surface of the charging base 20 in a sliding manner to realize free movement of the sub-board 22.

In the present invention, the wire is a flexible wire, and the length of the wire supports the sub-board 22 to be moved to any position in the charging base 20.

FIG. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention. As shown in FIG. 3, a mobile terminal according to an embodiment of the present invention is provided with a receiving coil 31 and a positioning magnet 32; wherein the receiving coil 31 is located in the The positioning magnet 32 is fixed to the mobile terminal in a manner of being located inside the receiving coil 31 on the mobile terminal.

Specifically, the positioning magnet 32 is fixed to the mobile terminal in a manner of being located at the center of the receiving coil 31.

In the present invention, the magnetic field strength of the positioning magnet 32 fixed to the mobile terminal is greater than the magnetic field strength of the return magnet 25.

The magnetic field strength of the positioning magnet 32 fixed to the mobile terminal is equivalent to the magnetic field strength of the positioning magnet 23 fixed to the sub-board 11, and is disposed in such a manner as to attract each other.

When the invention is applied, the mobile terminal is placed on the charging base 20, because it is fixed to the mobile The positioning magnet 32 on the terminal and the positioning magnet 23 fixed on the sub-board 22 are attracted to each other, and the sub-board 22 can be arbitrarily moved in the charging base 20, so that the two magnets will completely correspond, thereby moving The receiving coil 31 on the terminal and the transmitting coil 21 on the wireless charging device of the present invention achieve a central correspondence, and the receiving coil 31 and the transmitting coil 21 achieve better coupling, ensuring that the mobile terminal is placed at any position of the wireless charging device charging base 20, Both can guarantee the best charging of the mobile terminal.

When the mobile terminal is not wirelessly charged, since there is no more mobile terminal on the charging base 20, since the return magnet 25 in the vicinity of the transmitting circuit 26 and the positioning magnet 23 on the sub-board 11 are attracted to each other, the sub-board 22 will move and The return magnet 25 is fixed to the vicinity of the transmitting circuit 26 to fix the sub-board 22.

When the mobile terminal wirelessly charges the mobile terminal, the mobile terminal does not need to be displaced, but is only placed on the charging base of the wireless charging device, and can be placed arbitrarily; and when there is no wireless charging, the daughter board is fixed and transmitted. Near the circuit, you can't move around. The invention not only facilitates charging of the mobile terminal using the wireless charging device, but also improves the experience of using the wireless charging user.

The present invention also describes a wireless charging system including the wireless charging device shown in Fig. 2 and the mobile terminal supporting wireless charging shown in Fig. 3.

The magnetic field strength of the positioning magnet 32 fixed to the mobile terminal is greater than the magnetic field strength of the return magnet 25.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The invention provides a transmitting circuit, a transmitting coil, a movable sub-board of a fixed transmitting coil and a positioning magnet in a charging base of the wireless charging device, and the transmitting coil is connected to the transmitting power through a wire The positioning magnet is fixed on the sub-board in a manner of being located in the transmitting coil; and the receiving coil and the positioning magnet are disposed in the mobile terminal; wherein the receiving coil is positioned on the mobile terminal, and the positioning magnet is located in the receiving coil It is fixed on the mobile terminal. In this way, when the mobile terminal is wirelessly charged, the mobile does not need to be displaced at all, but is placed only on the charging base of the wireless charging device, and can be placed arbitrarily.

Claims

Claim

A wireless charging device, wherein the wireless charging device includes a charging base, and the charging base is provided with a transmitting circuit, a transmitting coil, a movable daughter board that fixes the transmitting coil, and a positioning magnet, The transmitting coil is connected to the transmitting circuit by a wire, and the positioning magnet is fixed to the daughter board in a manner of being located inside the transmitting coil.

2. The wireless charging device according to claim 1, wherein the positioning magnet is fixed to the sub-board at a center of the transmitting coil.

The wireless charging device according to claim 1 or 2, wherein the wireless charging device further comprises a return magnet disposed near the transmitting circuit, wherein a magnetic field strength of the return magnet is smaller than the positioning The magnetic field strength of the magnet, and the return magnet and the positioning magnet are disposed to attract each other.

The wireless charging device according to claim 3, wherein the bottom of the sub-board is provided with balls and/or rollers, and the sub-board can be freely in the charging base by the balls and/or rollers mobile.

5. The wireless charging device according to claim 4, wherein the wire is a flexible wire, and the length of the wire supports that the daughterboard can be moved to any position in the charging base.

A mobile terminal that supports wireless charging, wherein the mobile terminal is provided with a receiving coil and a positioning magnet; wherein the receiving coil is positioned on the mobile terminal, and the positioning magnet is located at the The manner within the receiving coil is fixed to the mobile terminal.

The mobile terminal according to claim 6, wherein the positioning magnet is fixed to the mobile terminal in such a manner as to be centered on the receiving coil.

A wireless charging system, characterized in that the wireless charging system comprises the wireless charging device according to any one of claims 1 to 5, and the mobile terminal supporting wireless charging according to claim 6 or 7.

9. The wireless charging system of claim 8, wherein the wireless charging system is fixed The magnetic field strength of the positioning magnet on the moving terminal is greater than the magnetic field strength of the returning magnet.

10. The wireless charging system according to claim 8, wherein a magnetic field strength of the positioning magnet fixed to the mobile terminal is equivalent to a magnetic field strength of a positioning magnet fixed to the sub-board and is attracted to each other. Mode setting.