WO2023134341A1

WO2023134341A1 - Wireless charging device

Info

Publication number: WO2023134341A1
Application number: PCT/CN2022/137606
Authority: WO
Inventors: 陈锐
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-01-11
Filing date: 2022-12-08
Publication date: 2023-07-20
Also published as: CN216625389U

Abstract

Provided is a wireless charging device. The wireless charging device comprises: a first coil, which is used for receiving electromagnetic energy and converting the electromagnetic energy into electric energy, so as to wirelessly charge the wireless charging device; and a second coil, which is used for transmitting electromagnetic energy, so as to wirelessly charge an electronic device that receives the electromagnetic energy, wherein the size of the second coil is different from the size of the first coil. When an electronic device is wirelessly charged by means of the wireless charging device, the size of a second coil can be adapted to the size of a receiving coil in the charged electronic device, and the charging efficiency of the wireless charging device itself is also not affected, thereby avoiding the problem in the relevant art of a low charging efficiency caused by using a first coil to wireless charge another electronic device.

Description

wireless charging device

This application claims the priority of a Chinese patent application with application number 202220069891.6 and application title "Wireless Charging Device" filed with the China Patent Office on January 11, 2022, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of mobile terminals, and more specifically, to a wireless charging device.

Background technique

Wireless charging technology has received more and more attention as a simple and feasible charging method. This technology usually utilizes the transmitter coil set in the wireless charging base and the receiving coil set in the wireless charging device to transfer energy through the principle of electromagnetic wave induction, so as to realize the charging of the wireless charging device.

With the development of wireless charging technology, the existing wireless charging equipment can not only charge itself through the wireless charging base, but also wirelessly charge other electronic equipment. For example, some mobile phones can be used to charge Bluetooth headsets or smart watches. However, when other electronic devices are wirelessly charged based on existing wireless charging devices, the charging efficiency is very low.

Contents of the invention

The present application provides a wireless charging device to effectively improve the charging efficiency of the existing wireless charging device when charging other electronic devices.

In the first aspect, there is provided a wireless charging device, which is characterized in that it includes: a first coil for receiving electromagnetic energy and converting the electromagnetic energy into electrical energy to wirelessly charge the wireless charging device; a second coil for wirelessly charging the wireless charging device; for transmitting electromagnetic energy to wirelessly charge an electronic device receiving the electromagnetic energy; wherein, the size of the second coil is different from that of the first coil.

Optionally, the first coil is also used to send electromagnetic energy to wirelessly charge the electronic device receiving the electromagnetic energy.

Optionally, the wireless charging device further includes: a first charging chip, which is connected to the second coil when the electronic device is wirelessly charged through the second coil; otherwise, the first charging chip The charging chip is connected with the first coil.

Optionally, the wireless charging device further includes: a first switch circuit, located between the first charging chip and the first coil, for connecting the first charging chip and the first coil; a second switch circuit A circuit, located between the first charging chip and the second coil, for connecting the first charging chip and the second coil; wherein, when the electronic device is wirelessly charged through the second coil , the first switch circuit is turned off and the second switch circuit is turned on, otherwise, the first switch circuit is turned on and the second switch circuit is turned off.

Optionally, the wireless charging device further includes: a first charging chip connected to the first coil; a second charging chip connected to the second coil; wherein, when the electronic device is wirelessly charged through the second coil When charging, the second charging chip is in the start state, otherwise, the second charging chip is in the stop working state.

Optionally, the second charging chip is a wireless charging control chip having both receiving and transmitting functions or a wireless charging control chip having only transmitting function.

Optionally, the first charging chip is a wireless charging control chip having both receiving and transmitting functions.

Optionally, the wireless charging device further includes: a processor, the processor is configured to control the working states of the first coil and the second coil.

Optionally, the wireless charging device further includes: a sensor, where the sensor is used to assist the processor in controlling the working states of the first coil and the second coil.

Optionally, the wireless charging device is a mobile terminal device, and the electronic device is a peripheral device of the mobile terminal device.

Optionally, the mobile terminal device is a mobile phone or a tablet computer.

Optionally, the peripheral devices of the mobile terminal device include one or more of the following: Bluetooth earphones, smart bracelets, and smart stylus.

The wireless charging device provided by the embodiment of the present application has a first coil for charging itself and a second coil for wirelessly charging other electronic devices, and the size of the second coil is set to be the same as that of the first coil The sizes are different. When the wireless charging device is used to wirelessly charge other electronic devices, the size of the second coil can be adapted to the size of the receiving coil in the electronic device being charged without affecting the charging efficiency of the wireless charging device itself, avoiding The problem of low charging efficiency caused by using the first coil to wirelessly charge other electronic devices in the related art is solved.

Description of drawings

Fig. 1 is a schematic structural diagram of a wireless charging device provided by an embodiment of the present application.

FIG. 2 is a schematic diagram of a coil driving circuit provided by an embodiment of the present application.

Fig. 3 is a schematic diagram of a coil driving circuit provided by another embodiment of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application is described in more detail below based on exemplary embodiments in conjunction with the accompanying drawings. The same or similar reference numerals are used in the figures to denote the same or similar modules. It should be understood that the drawings are only schematic, and the protection scope of the present application is not limited thereto.

With the application of wireless charging technology more and more widely, the wireless charging device gradually develops to not only charge itself through the wireless charging base, but also wirelessly charge other electronic devices.

The wireless charging device in the embodiment of the present application may refer to any electronic device that can be charged through a wireless charging technology and externally charged. For example, the wireless charging device may be a wireless power bank or a mobile terminal device. The mobile terminal device can be, for example, a mobile phone or a smart phone (such as a phone based on iPhone™, or a phone based on Android™), a portable gaming device (such as Nintendo DS™, Play Station Portable™, Gameboy Advance™, iPhone™) , laptops, personal digital assistants (PDAs), portable Internet devices, etc.

The other electronic device in the embodiment of the present application may be any electronic device that can be charged through a wireless charging technology. In some implementation manners, the other electronic device may be the aforementioned wireless charging device. In some other implementation manners, the other electronic device may be a peripheral device of the mobile terminal device. A peripheral device may refer to an electronic device used in conjunction with a mobile terminal device. For example, the other electronic devices may be various earphones (for example, Bluetooth earphones or True Wireless Stereo earphones, referred to as TWS earphones, etc.), smart watches (or smart bracelets), smart stylus pens, wireless mice, and the like.

There is usually a coil in the wireless charging device, and the coil is used for charging the wireless charging device, so the coil is usually set to a larger size (for example, the size of the coil can be within the range allowed by the space of the wireless charging device is set to the maximum), so that when the wireless charging device is placed on the wireless charging base, the charging efficiency of the wireless charging device can be fully guaranteed.

In order to make the wireless charging device meet the requirement of wireless charging for other electronic devices. A feasible way is to set the above-mentioned coil as a coil capable of receiving and emitting electromagnetic energy at the same time, so as to charge other electronic devices through the coil.

However, electronic devices that are usually charged by a wireless charging device are smaller in size and capacity than the wireless charging device. For example, mobile phones, Bluetooth headsets or smart watches are often carried by users. When the Bluetooth headset or smart watch is out of power, Typically, the phone is used to charge headphones or a smart watch. In this case, if the above-mentioned coil used for charging of the wireless charging device (such as the above-mentioned mobile phone) is directly used to transmit electromagnetic energy, it will be due to the reception of the transmitting coil and the electronic device (such as the above-mentioned Bluetooth headset or smart watch). The wide variation in the size of the coils results in the electronics being able to couple only a fraction of the emitted electromagnetic energy, resulting in very inefficient charging.

In order to solve the above problems, the wireless charging device proposed in the embodiment of the present application has both a first coil for charging itself and a second coil for wirelessly charging other electronic devices. The size of the second coil is set to be different from the size of the first coil, so that the size of the second coil is adapted to the size of the receiving coil in the electronic device to be charged, so that other electronic devices can be wirelessly charged , effectively improve the charging efficiency.

The wireless charging device provided by the embodiment of the present application will be described in detail below with reference to FIG. 1 .

Referring to FIG. 1 , a wireless charging device 10 may include a first coil 11 , a second coil 12 and a control module 13 .

The first coil 11 is used to receive electromagnetic energy emitted by other devices capable of charging it, and convert the electromagnetic energy into electrical energy, so as to wirelessly charge the wireless charging device itself. Other devices that can charge it may be a charging pad or a charging base, or may be another of the above wireless charging devices.

The second coil 12 is used to send electromagnetic energy to wirelessly charge electronic devices capable of receiving the electromagnetic energy. The electronic device is the other electronic device mentioned above.

The control module 13 can be used to control the working state of the first coil and/or the second coil according to the working condition of the wireless charging device. In some implementations, the working condition of the wireless charging device may be that it can also charge other electronic devices while charging itself, and the control module 13 may control the first coil and the second coil to work simultaneously. In some other implementations, the working condition of the wireless charging device may be one of the following: charging itself or charging other electronic devices. In this working condition, the control module 13 may control the first coil or the second coil to turn on work, while controlling another coil (that is, the second coil or the first coil) to stop working.

Wherein, the size of the second coil 12 is different from that of the first coil 11 , so that the wireless charging device 10 can charge other electronic devices with different sizes. Preferably, in some implementations, as shown in FIG. 1 , the size of the second coil 12 is smaller than the size of the first coil 11, so as to be widely available for other electronic devices smaller than the wireless charging device 10 (also called Efficient charging of electronic devices to be charged, such as the aforementioned small peripheral devices.

In the embodiment of the present application, a second coil specially used for wirelessly charging other electronic devices is provided, and the size of the second coil is set to be different from that of the first coil for charging itself. In this way, the size of the second coil can be adapted to the size of the receiving coil in the electronic device to be charged, so that when wireless charging is performed for other electronic devices, the receiving coil of other electronic devices can be coupled to the second coil. Most of the energy emitted by the coil effectively improves the charging efficiency.

It should be understood that the arrangement and shape structure of the first coil 11 and the second coil 12 in FIG. 1 is only an example. As long as the wireless charging device has the first coil 11 and the second coil 12 mentioned above, it is within the scope of protection of the wireless charging device of the embodiment of the present application.

The embodiment of the present application does not specifically limit the above-mentioned first coil 11, as long as the first coil 11 can be used to wirelessly charge the wireless charging device 10. In some implementations, the first coil 11 can be used to receive electromagnetic energy to wirelessly charge the wireless charging device 10 , and can also be used to send electromagnetic energy to wirelessly charge other electronic devices that receive the electromagnetic energy. By setting the first coil 11 to be used for wireless charging for other electronic devices at the same time, when the receiving coil in other electronic devices is matched with the first coil 11, the wireless charging device 10 can efficiently charge other electronic devices. Electronic device charging.

The embodiment of the present application does not specifically limit the driving manner of the first coil 11 or the second coil 12 . In some embodiments, as shown in FIG. 2 , the first coil 11 and the second coil 12 can be jointly driven by the first charging chip 14 . When other electronic devices (for example, small peripheral devices) need to be charged through the second coil 12 in the wireless charging device 10 , the control module 13 can control the first charging chip 14 to connect to the second coil 12 . When it is necessary to receive electromagnetic energy through the first coil 11 in the wireless charging device 10 to charge the wireless charging device 10 itself, or to transmit electromagnetic energy through the first coil 11 to charge other electronic devices (for example, the same size as the wireless charging device 10 When performing wireless charging on electronic devices or large electronic devices), the control module 13 can control the first charging chip 14 to be connected to the first coil 11 . By setting the first coil 11 and the second coil 12 to be driven by the same first charging chip 14 , the manufacturing cost of the wireless charging device 10 can be effectively reduced.

The embodiment of the present application does not specifically limit the switching connection mode between the first charging chip 14 and the first coil 11 or the second coil 12 . As an implementation manner, as shown in FIG. 2 , the first coil 11 is connected to the first charging chip 14 through a first switch circuit 15 . The second coil 12 is connected to the first charging chip 14 through the second switch circuit 16 . When the second coil 12 is required to wirelessly charge other electronic devices, the control module 13 can control the first switch circuit 15 to turn off and the second switch circuit 16 to turn on, so that the first charging chip 14 is connected to the second coil 12 . And when the first coil 11 is required to charge the wireless charging device itself or wirelessly charge other electronic devices, the control module 13 can control the first switch circuit 15 to be turned on and the second switch circuit 16 to be turned off, so that the first charging chip 14 is connected with the first coil 11.

Generally speaking, the first coil 11 or the second coil 12 itself has inductance and capacitance, therefore, in order to ensure that the switch circuit can effectively turn off the circuit. As shown in FIG. 2 , the first switch circuit 15 may include a first switch 151 and a second switch 152 . The second switch circuit 16 may include a third switch 161 and a fourth switch 162 . The first switch 151 and the second switch 152 are respectively located near the connection points between the two ends of the first coil 11 and the first charging chip 14 . The third switch 161 and the fourth switch 162 are respectively located near the connection points between the two ends of the second coil 12 and the first charging chip 14 . By arranging two switches on the first switch circuit 15 and the second switch circuit 16, when switching between the first coil 11 and the second coil 12, the electric energy stored in the capacitance of the first coil 11 or the second coil 12 can be avoided. Influence the electrical connection between the first charging chip 14 and the first coil 11 or the second coil 12 to effectively shut down the circuit connection completely when it is necessary to shut down the circuit connection.

In some other embodiments, as shown in FIG. 3 , the first coil 11 and the second coil 12 can be connected to the first charging chip 14 and the second charging chip 17 respectively, and the first charging chip 14 and the second charging chip can be used 17 are respectively driven. When other electronic devices (eg, small peripheral devices) need to be charged through the second coil 12 in the wireless charging device 10 , the control module 13 can control the second charging chip 17 to start working. When it is necessary to receive electromagnetic energy through the first coil 11 in the wireless charging device 10 to charge the wireless charging device 10 itself, or to transmit electromagnetic energy through the first coil 11 to charge other electronic devices (for example, the same size as the wireless charging device 10 When performing wireless charging on electronic equipment or large electronic equipment), the control module 13 can control the first charging chip 14 to start working.

The embodiment of the present application does not specifically limit under what circumstances the first charging chip 14 or the second charging chip 17 is in the activated state, as long as the first coil 11 or the second coil 12 is required to work, the corresponding charging chip can be driven It is in the activated state, and when the first coil 11 or the second coil 12 does not need to work, the corresponding charging chip can be driven to be in the stopped state. By setting an independent charging chip for driving the first coil 11 and the second coil 12 respectively, the two coils can work simultaneously, which can effectively improve the compatibility and flexibility of the wireless charging device. For example, while using the first coil 11 to charge the wireless charging device itself, use the second coil 12 to charge other electronic devices, and at this time, the first charging chip 14 and the second charging chip 17 can be driven simultaneously. Or it is also possible to use the second coil 12 to wirelessly charge another electronic device while using the first coil 11 to wirelessly charge another electronic device. At this time, the first charging chip 14 and the second charging chip can also be driven at the same time. 17.

The embodiment of the present application does not specifically limit the type of the first charging chip 14 or the second charging chip 17 . As an implementation, the first charging chip 14 is a wireless charging control chip (or TRX IC) with both receiving and transmitting functions; the second charging chip 17 can be a wireless charging control chip (or TRX IC) having both receiving and transmitting functions. It is called TRX IC) or a wireless charging control chip (or TX IC) that only has a transmitting function.

As mentioned above, the working state of the first coil 11 or the second coil 12 can be controlled by the control module 13 , correspondingly, the activation of the first charging chip 14 or the second charging chip 17 is also controlled by the control module 13 . The embodiment of the present application does not specifically limit the foregoing control module 13 . In some implementation manners, the foregoing control module 13 may be a processor of the wireless charging device 10 . For example, when the wireless charging device 10 is a mobile phone, its control module 13 may be the CPU of the mobile phone. The mobile phone CPU can control the working state of the first coil 11 and/or the second coil 12 (that is, control the starting state of the first charging chip 14 or the second charging chip 17) according to certain software logic. The software logic can be generated according to the working mode selected by the user in the mobile phone system. For example, the mobile phone can provide the user with the option to choose whether to use the mobile phone to charge the peripheral equipment of the mobile phone. If the user chooses to charge the above electronic When the device performs wireless charging, software logic for making the second coil 12 work is generated. And the mobile phone CPU can control the second coil 12 to start working according to the software logic.

In some other implementation manners, the wireless charging device may further include a sensor, and the sensor may assist the processor in controlling the working states of the first coil 11 and the second coil 12 . Still taking the wireless charging device 10 as a mobile phone as an example, after the above-mentioned software logic for making the second coil work is generated, it is also necessary to cooperate with the sensor to detect whether the electronic device to be charged is close to the mobile phone. If the sensor also detects that the electronic device to be charged is attached to the corresponding position of the wireless charging device, the signal can be notified to the CPU of the mobile phone, and the CPU of the mobile phone can control the second coil to start working according to the software logic and the signal.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A wireless charging device, characterized in that it includes:

The first coil is used to receive electromagnetic energy and convert the electromagnetic energy into electrical energy, so as to wirelessly charge the wireless charging device;

a second coil for emitting electromagnetic energy to wirelessly charge an electronic device receiving said electromagnetic energy;

Wherein, the size of the second coil is different from that of the first coil.
The wireless charging device according to claim 1, wherein the first coil is also used to send electromagnetic energy to wirelessly charge the electronic device receiving the electromagnetic energy.
The wireless charging device according to claim 2, further comprising:

A first charging chip, when the electronic device is wirelessly charged through the second coil, the first charging chip is connected to the second coil; otherwise, the first charging chip is connected to the first coil.
The wireless charging device according to claim 3, further comprising:

a first switch circuit, located between the first charging chip and the first coil, for connecting the first charging chip and the first coil;

a second switch circuit, located between the first charging chip and the second coil, for connecting the first charging chip and the second coil;

Wherein, when the electronic device is wirelessly charged through the second coil, the first switch circuit is turned off and the second switch circuit is turned on; otherwise, the first switch circuit is turned on and the second switch circuit is turned on. The switching circuit is turned off.
The wireless charging device according to claim 2, further comprising:

a first charging chip connected to the first coil;

a second charging chip connected to the second coil;

Wherein, when the electronic device is wirelessly charged through the second coil, the second charging chip is in an active state; otherwise, the second charging chip is in a stop working state.
The wireless charging device according to claim 5, wherein the second charging chip is a wireless charging control chip having both receiving and transmitting functions or a wireless charging control chip having only transmitting function.
The wireless charging device according to any one of claims 3-6, wherein the first charging chip is a wireless charging control chip having both receiving and transmitting functions.
The wireless charging device according to any one of claims 1-6, further comprising:

A processor, the processor is used to control the working states of the first coil and the second coil.
The wireless charging device according to claim 8, further comprising:

A sensor, the sensor is used to assist the processor to control the working state of the first coil and the second coil.
The wireless charging device according to claim 1, wherein the wireless charging device is a mobile terminal device, and the electronic device is a peripheral device of the mobile terminal device.
The wireless charging device according to claim 10, wherein the mobile terminal device is a mobile phone or a tablet computer.
According to the wireless charging device according to claim 11, the peripheral device of the mobile terminal device includes one or more of the following: a Bluetooth headset, a smart bracelet, and a smart stylus.