CN216625389U

CN216625389U - Wireless charging equipment

Info

Publication number: CN216625389U
Application number: CN202220069891.6U
Authority: CN
Inventors: 陈锐
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-05-27
Anticipated expiration: 2032-01-11
Also published as: WO2023134341A1

Abstract

Provided is a wireless charging device including: a first coil for receiving electromagnetic energy and converting the electromagnetic energy into electrical energy for wirelessly charging the wireless charging device; a second coil for transmitting electromagnetic energy for wirelessly charging an electronic device receiving the electromagnetic energy; wherein the second coil is different in size from the first coil. When wirelessly charging electronic equipment through this wireless battery charging outfit, can make the size of the size adaptation of second coil in the electronic equipment's that is charged size of receiving coil, do not influence this wireless battery charging outfit self charging efficiency simultaneously, avoided using first coil to carry out the problem that charging efficiency is low that wireless charging led to for other electronic equipment among the correlation technique.

Description

Wireless charging equipment

Technical Field

The application relates to the field of mobile terminals, in particular to a wireless charging device.

Background

Wireless charging technology has received increasing attention as a simple and feasible charging method. The technology generally utilizes a transmitting coil arranged in a wireless charging base and a receiving coil arranged in a wireless charging device to transfer energy through the electromagnetic wave induction principle so as to realize charging of the wireless charging device.

With the development of wireless charging technology, the existing wireless charging equipment can be charged for itself through the wireless charging base, and can also be used for wirelessly charging other electronic equipment. For example, some of the cell phones may be used to charge a bluetooth headset or a smart watch, etc. However, when other electronic devices are wirelessly charged based on the existing wireless charging device, the charging efficiency is very low.

Disclosure of Invention

The application provides a wireless charging device to effectively improve the charge efficiency of current wireless charging device when charging other electronic equipment.

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

Optionally, the first coil is further configured to transmit electromagnetic energy to wirelessly charge the electronic device receiving the electromagnetic energy.

Optionally, the wireless charging device further comprises: the first charging chip is connected with the second coil when the electronic equipment is wirelessly charged through the second coil, otherwise, the first charging chip is connected with the first coil.

Optionally, the wireless charging device further comprises: the first switch circuit is positioned between the first charging chip and the first coil and used for connecting the first charging chip and the first coil; the second switch circuit is positioned between the first charging chip and the second coil and used for connecting the first charging chip and the second coil; when the electronic equipment 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 comprises: the first charging chip is connected with the first coil; the second charging chip is connected with the second coil; when the electronic equipment is wirelessly charged through the second coil, the second charging chip is in a starting state, otherwise, the second charging chip is in a 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 comprises: a processor for controlling the operating state of the first coil and the second coil.

Optionally, the wireless charging device further comprises: a sensor to assist the processor in controlling the operating state 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 device of the mobile terminal device includes one or more of the following: bluetooth headset, intelligent bracelet, intelligent touch-control pen.

The wireless charging device provided by the embodiment of the application is provided with a first coil used for charging the wireless charging device and a second coil used for wirelessly charging other electronic devices, and the size of the second coil is set to be different from that of the first coil. When carrying out wireless charging to other electronic equipment through this wireless battery charging outfit, can make the size of a dimension adaptation of second coil in the electronic equipment's that is charged size of receiving coil, do not influence this wireless battery charging outfit self charging efficiency simultaneously, avoided using first coil to carry out the problem that charging efficiency is low that wireless charging led to for other electronic equipment among the correlation technique.

Drawings

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

Fig. 2 is a circuit diagram of a coil driver according to an embodiment of the present application.

Fig. 3 is a circuit diagram of a coil driver according to another embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application is described in more detail below based on exemplary embodiments and in conjunction with the accompanying drawings. The same or similar reference numbers are used in the drawings to refer to the same or similar modules. It is to be understood that the drawings are diagrammatic and not restrictive, and that the scope of the application is not limited thereto.

Along with the application of the wireless charging technology is more and more extensive, wireless charging equipment develops gradually and not only can charge for self through the wireless charging base, but also can carry out wireless charging for other electronic equipment.

The wireless charging device in the embodiment of the present application may refer to any one of electronic devices that can be charged and externally charged by a wireless charging technology. For example, the wireless charging device may be a wireless charging bank or a mobile terminal device. The mobile terminal device may be, for example, a mobile phone or a smart phone (which may be, for example, an iPhone (TM) -based phone or an Android (TM) -based phone), a Portable game device (e.g., Nintendo DS (TM), Play Station Portable (TM), game Advance (TM), iPhone (TM)), a laptop, a Personal Digital Assistant (PDA), a Portable internet device, or the like.

The other electronic device in the embodiment of the present application may be any one of electronic devices that can be charged by a wireless charging technology. In some implementations, the other electronic device may be the wireless charging device described above. In other implementations, 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 types of earphones (e.g., a bluetooth earphone or a True Wireless Stereo earphone, TWS earphone for short, etc.), a smart watch (or smart band), a smart stylus, a Wireless mouse, and the like.

The wireless charging device generally has a coil therein, and the coil is used for charging the wireless charging device, so the coil is generally set to have a larger size (for example, the size of the coil can be set to be the largest within a range allowed by a space of the wireless charging device), so that when the wireless charging device is placed on the wireless charging base, the charging efficiency of the wireless charging device can be sufficiently ensured.

In order to enable the wireless charging device to meet the requirement of wirelessly charging other electronic devices. One possibility is to arrange the coil as a coil that can simultaneously receive and transmit electromagnetic energy in order to charge other electronic devices via the coil.

However, the electronic device that is usually charged by the wireless charging device is smaller than the wireless charging device in size and capacitance, for example, the mobile phone, the bluetooth headset or the smart watch is often carried by the user, and when the bluetooth headset or the smart watch is dead, the mobile phone is usually used to charge the headset or the smart watch. In this case, if the coil for charging of the wireless charging device (for example, the mobile phone) is directly used to transmit electromagnetic energy, the electromagnetic energy may be coupled to only a small amount of the transmitted electromagnetic energy by the electronic device (for example, the bluetooth headset or the smart watch) due to the large size difference between the transmitting coil and the receiving coil in the electronic device, and thus the charging efficiency is very low.

In order to solve the above problem, 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 this second coil is set up to be different with the size of first coil to make the size of size adaptation of second coil in the electronic equipment who is charged size of receiving coil, thereby can be when carrying out wireless charging for other electronic equipment, effectively improve charge efficiency.

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

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

The first coil 11 is used for receiving electromagnetic energy emitted by other devices capable of being charged and converting the electromagnetic energy into electric energy so as to wirelessly charge the wireless charging device. Other devices that may be charged may be a charging pad or a charging cradle, or may be another wireless charging device as described above.

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

The control module 13 may be configured to control the operating state of the first coil and/or the second coil according to the operating condition of the wireless charging device. In some implementations, the working condition of the wireless charging device may be that other electronic devices may be charged while charging itself, and then the control module 13 may control the first coil and the second coil to be turned on simultaneously. In other implementations, the operating condition of the wireless charging device may be one of: the control module 13 may control the first coil or the second coil to start operating, and control the other coil (i.e., the second coil or the first coil) to stop operating.

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 that of the first coil 11, so as to effectively charge other electronic devices (which may also be referred to as electronic devices to be charged, for example, the small-sized peripheral devices described above) that are widely smaller than the wireless charging device 10.

This application embodiment is used for carrying out wireless second coil that charges for other electronic equipment through setting up specially, and set up the size of this second coil into with the size difference that carries out the first coil that charges to self. By the method, the size of the second coil can be adapted to the size of the receiving coil in the charged electronic equipment, so that when other electronic equipment is wirelessly charged, the receiving coil of other electronic equipment can be coupled to most of energy emitted by the second coil, and the charging efficiency is effectively improved.

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

The first coil 11 is not particularly limited in the embodiment of the present application, as long as the first coil 11 can be used for wirelessly charging the wireless charging device 10. In some implementations, the first coil 11 can be used to both receive electromagnetic energy to wirelessly charge the wireless charging device 10 and to transmit electromagnetic energy to wirelessly charge other electronic devices that receive the electromagnetic energy. By arranging the first coil 11 to be simultaneously available for wirelessly charging other electronic devices, the wireless charging device 10 can efficiently charge such other electronic devices when the receiving coil in the other electronic devices is matched with the first coil 11.

The embodiment of the present application does not specifically limit the driving method 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 may be driven using the first charging chip 14 in common. When it is required to charge other electronic devices (e.g., small-sized peripheral devices) through the second coil 12 in the wireless charging device 10, the control module 13 may control the first charging chip 14 to be connected with the second coil 12. When it is required to receive electromagnetic energy through the first coil 11 of the wireless charging device 10 to charge the wireless charging device 10 itself, or it is required to transmit electromagnetic energy through the first coil 11 to wirelessly charge other electronic devices (for example, electronic devices or large electronic devices having the same size as the wireless charging device 10), the control module 13 may control the first charging chip 14 to be connected to the first coil 11. By arranging 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 manner between the first charging chip 14 and the first coil 11 or the second coil 12. As one implementation, 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 a second switching circuit 16. When the second coil 12 is required to wirelessly charge other electronic devices, the control module 13 may control the first switch circuit 15 to be turned off and the second switch circuit 16 to be turned on, so that the first charging chip 14 is connected to the second coil 12. When the first coil 11 is needed to charge the wireless charging device itself or wirelessly charge other electronic devices, the control module 13 may 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 to the first coil 11.

Generally, the first coil 11 or the second coil 12 itself has inductance and capacitance, and thus, the circuit can be effectively turned off in order to ensure the switching 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 connection points of both 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 connection points of both 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, it can be avoided that the electric energy stored in the capacitor of the first coil 11 or the second coil 12 affects the electric connection between the first charging chip 14 and the first coil 11 or the second coil 12 when the first coil 11 and the second coil 12 are switched, so as to effectively turn off the circuit connection completely when the circuit connection needs to be turned off.

In other embodiments, as shown in fig. 3, the first coil 11 and the second coil 12 may be connected to the first charging chip 14 and the second charging chip 17, respectively, and driven using the first charging chip 14 and the second charging chip 17, respectively. When it is required to charge other electronic devices (e.g., small-sized peripheral devices) through the second coil 12 in the wireless charging device 10, the control module 13 may control the second charging chip 17 to start operating. When it is required to receive electromagnetic energy through the first coil 11 of the wireless charging device 10 to charge the wireless charging device 10 itself, or it is required to transmit electromagnetic energy through the first coil 11 to wirelessly charge other electronic devices (for example, electronic devices or large electronic devices with the same size as the wireless charging device 10), the control module 13 may control the first charging chip 14 to start operation.

The embodiment of the present application does not specifically limit what kind of situation the first charging chip 14 or the second charging chip 17 is in the starting state, and as long as the first coil 11 or the second coil 12 is required to operate, the corresponding charging chip may be driven to be in the starting state, and when the first coil 11 or the second coil 12 is not required to operate, the corresponding charging chip may be driven to be in the stopping state. Through setting up an independent chip that charges respectively for first coil 11 and second coil 12 and drive, can let these two coils simultaneous working, can effectively improve wireless charging equipment's compatibility and flexibility. For example, the other electronic devices may be charged using the second coil 12 while the wireless charging device itself is charged using the first coil 11, at which time the first charging chip 14 and the second charging chip 17 may be driven simultaneously. Alternatively, while one other electronic device is wirelessly charged by using the first coil 11, another other electronic device may be wirelessly charged by using the second coil 12, and at this time, the first charging chip 14 and the second charging chip 17 may be driven at the same time.

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 one implementation, the first charging chip 14 is a wireless charging control chip (or TRX IC) having both receiving and transmitting functions; the second charging chip 17 may be a wireless charging control chip (or TRX IC) having both receiving and transmitting functions or a wireless charging control chip (or TX IC) having only transmitting function.

As described above, the operating state of the first coil 11 or the second coil 12 can be controlled by the control module 13, and accordingly, whether the first charging chip 14 or the second charging chip 17 is activated or not is also controlled by the control module 13. The embodiment of the present application does not specifically limit the control module 13. In some implementations, the aforementioned 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, the control module 13 may be a CPU of the mobile phone. The CPU of the mobile phone may control the operating state of the first coil 11 and/or the second coil 12 (i.e. control the starting state of the first charging chip 14 or the second charging chip 17) according to a certain software logic. The software logic may be generated according to an operating mode selected by the user in the mobile phone system, for example, the mobile phone may provide the user with an option of selecting whether to use the mobile phone to charge the peripheral device of the mobile phone, and if the user selects to wirelessly charge the electronic device, the software logic may be generated to operate the second coil 12. And the mobile phone CPU can control the second coil 12 to start up according to the software logic.

In other implementations, a sensor may be further included in the wireless charging device, and the sensor may assist the processor in controlling the operating states of the first coil 11 and the second coil 12. Still taking the wireless charging device 10 as an example of a mobile phone, after the software logic for operating the second coil is generated, it is further necessary to determine whether the electronic device to be charged is close to the mobile phone in cooperation with the sensor. If the sensor also detects that the electronic equipment to be charged is attached to the corresponding position of the wireless charging equipment, the sensor can inform the mobile phone CPU of the signal, and the mobile phone CPU can control the second coil to start working according to the software logic and the signal.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., 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, a data center, etc., that includes one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Versatile Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wireless charging device, comprising:

a first coil for receiving electromagnetic energy and converting the electromagnetic energy into electrical energy for wirelessly charging the wireless charging device;

a second coil for transmitting electromagnetic energy to wirelessly charge an electronic device receiving the electromagnetic energy;

wherein the second coil is different in size from the first coil.

2. The wireless charging device of claim 1, wherein the first coil is further configured to transmit electromagnetic energy to wirelessly charge the electronic device receiving the electromagnetic energy.

3. The wireless charging device of claim 2, further comprising:

the first charging chip is connected with the second coil when the electronic equipment is wirelessly charged through the second coil, otherwise, the first charging chip is connected with the first coil.

4. The wireless charging device of claim 3, further comprising:

the first switch circuit is positioned between the first charging chip and the first coil and used for connecting the first charging chip and the first coil;

the second switch circuit is positioned between the first charging chip and the second coil and used for connecting the first charging chip and the second coil;

when the electronic equipment is wirelessly charged through the second coil, the first switch circuit is switched off and the second switch circuit is switched on, otherwise, the first switch circuit is switched on and the second switch circuit is switched off.

5. The wireless charging device of claim 2, further comprising:

the first charging chip is connected with the first coil;

the second charging chip is connected with the second coil;

when the electronic equipment is wirelessly charged through the second coil, the second charging chip is in a starting state, otherwise, the second charging chip is in a stop working state.

6. The wireless charging device according to claim 5, wherein the second charging chip is a wireless charging control chip having both a receiving and a transmitting function or a wireless charging control chip having only a transmitting function.

7. The wireless charging device of any one of claims 3-6, wherein the first charging chip is a wireless charging control chip having both receiving and transmitting functions.

8. The wireless charging device of any one of claims 1-6, further comprising:

a processor for controlling the operating state of the first coil and the second coil.

9. The wireless charging device of claim 8, further comprising:

a sensor to assist the processor in controlling the operating state of the first coil and the second coil.

10. The wireless charging device of 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.

11. The wireless charging device of claim 10, wherein the mobile terminal device is a mobile phone or a tablet computer.

12. The wireless charging device of claim 11, wherein the peripheral devices of the mobile terminal device comprise one or more of: bluetooth headset, intelligent bracelet, intelligent touch-control pen.