CN113178952A

CN113178952A - Wireless charging equipment and wireless charging system

Info

Publication number: CN113178952A
Application number: CN202110450123.5A
Authority: CN
Inventors: 冉凤
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-07-27

Abstract

The present disclosure provides a wireless charging device and a wireless charging system. The wireless charging equipment provided by the disclosure comprises a first coil and a second coil which are connected with a charging management chip; wherein the wireless charging device communicates with a receiving coil of a powered device through the first coil to transmit communication information, and energy is transferred to the receiving coil through the second coil to charge the powered device through the transferred energy. The wireless charging equipment and the wireless charging system provided by the disclosure can improve the charging efficiency, can also reduce the problem of frequent disconnected charging caused by weak coupling, and can improve the charging experience.

Description

Wireless charging equipment and wireless charging system

Technical Field

The present disclosure relates to the field of wireless charging technologies, and in particular, to a wireless charging device and a wireless charging system.

Background

At present, more and more electronic devices are charged in a wireless charging mode. For example, a mobile phone, a toothbrush, a shaver and the like can be charged in a wireless charging mode.

The existing wireless charging equipment needs to communicate with the powered equipment through a wireless transmitting coil in the process of wirelessly charging the powered equipment, so that the charging efficiency is seriously influenced.

Disclosure of Invention

The present disclosure provides a wireless charging device and a wireless charging system to solve the disadvantages in the related art.

According to a first aspect of the embodiments of the present disclosure, a wireless charging device is provided, which includes a first coil and a second coil connected to a charging management chip; wherein,

the wireless charging device communicates with a receiving coil of a power receiving device through the first coil to transmit communication information, and energy is transferred to the receiving coil through the second coil to charge the power receiving device through the transferred energy.

Further, the first coil comprises a single turn coil; the second coil comprises a plurality of coils wound from inside to outside along the circumferential direction by a lead, a hollow area is arranged at the central point of the plurality of coils, and the first coil is accommodated in the hollow area.

The charging management chip is used for entering a response waiting state when the second coil induces that the powered device enters a charging range of the device, and determining that the handshake with the powered device succeeds when the first coil receives a response message of the powered device in a response time period.

Further, the charging management chip is further configured to, after it is determined that the handshake with the powered device is successful, output a charging current matching the required current and the required voltage to the second coil based on the required current and the required voltage carried in the response message, so as to transfer energy to the receiving coil through the second coil.

Further, the charging management chip is further configured to receive charging information from the powered device through the first coil during charging, and output a charging current matching the charging information to the second coil based on the charging information, so as to transfer energy to the receiving coil through the second coil.

Further, the charging management chip is further configured to stop charging the powered device when receiving a termination instruction from the powered device through the first coil.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the above embodiment, the wireless charging device and the wireless charging system provided by the present disclosure, through setting the first coil and the second coil in the wireless charging device, can make the wireless charging device pass through the communication transmission communication information between the first coil and the receiving coil of the power receiving device, through the second coil to the receiving coil carries out energy transfer, and it is right to charge the power receiving device through the transferred energy, so that the second coil only transfers energy, and not only can the charging efficiency be improved, but also the problem of frequent disconnected charging caused by weak coupling can be reduced, and the charging experience can be improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a top view of a wireless charging device shown in accordance with an exemplary embodiment of the present disclosure;

fig. 2 is an operational schematic diagram of a wireless charging device according to an exemplary embodiment of the present disclosure;

fig. 3 is a top view of another wireless charging device shown in accordance with an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a power receiving apparatus according to an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The principle of wireless charging is to set a transmitting coil on a wireless charging device and a receiving coil on a power receiving device. The transmitting coil generates an alternating magnetic field through the accessed alternating current, and the change of the magnetic field generates induction current in the receiving coil, so that energy is transferred from the wireless charging device to the power receiving device.

The existing wireless charging equipment needs to communicate with the powered equipment through a transmitting coil in the process of wirelessly charging the powered equipment, so that the charging efficiency is seriously influenced.

The present disclosure provides a wireless charging device and a wireless charging system to solve the problem of low charging efficiency when communicating with a power receiving device through a transmitting coil in the related art.

Several specific embodiments are given below to illustrate the technical solutions of the present disclosure in detail, and these specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 1 is a top view of a wireless charging device shown in accordance with an exemplary embodiment of the present disclosure. Referring to fig. 1, the wireless charging device provided in this embodiment includes a first coil 2 and a first coil 2 connected to a charging management chip 1, where the wireless charging device communicates with a receiving coil of a powered device through the first coil 2 to transmit communication information, and energy is transferred to the receiving coil through the first coil 2, so as to charge the powered device through the transferred energy.

Specifically, the charging management chip 1 is configured to, when charging information from the powered device is received through the first coil 2, control output power of the chip based on the charging information, so as to output a charging current matching the charging information to the first coil 2, so as to perform energy transfer to the receiving coil through the first coil 2.

The charging information may be a required charging current, a required charging voltage, and the like, and in this embodiment, the charging information is not limited thereto.

Specifically, for the specific structure and the operation principle of the charge management chip 1, reference may be made to the description in the related art, and details are not repeated here. For example, in one embodiment, the charging management chip 1 may include a control unit, and a modulation and demodulation unit and an output circuit respectively connected to the controller.

The first coil 2 may be connected to a modem unit of the charging management chip 1. The modulation and demodulation unit is mainly used for modulating and demodulating communication information. For example, communication information from the power receiving apparatus received by the first coil 2 is demodulated, and the demodulated communication information is transmitted to the control unit. For another example, after the communication information sent by the control unit is modulated, the modulated communication information is sent out through the first coil 2.

Further, the first coil 2 may be connected to an output circuit. And an output circuit, which is mainly used for outputting a charging current to the first coil 2 under the control of the control unit so as to transfer energy to a receiving coil of the power receiving device through the first coil 2.

It should be noted that, the specific control principle of the output circuit by the controller may be referred to the description in the related art, and is not described herein again. For example, after the wireless charging device obtains the required charging current and the required charging voltage of the powered device, the charging power may be calculated, and the output circuit may be controlled to output an appropriate charging current to the first coil 2 according to the charging power.

Specifically, the first coil 2 and the first coil 2 may be various forms of coils. In the present embodiment, the specific structure and the specific shape of the first coil 2 and the first coil 2 are not limited.

For example, in terms of structure, in an embodiment, the body and the two terminals of the first coil 2 and/or the first coil 2 are coplanar (the body and the two terminals of the coil are substantially in one plane). For another example, in another embodiment, the body and the two terminals of the first coil 2 and/or the first coil 2 are not coplanar. For example, the first coil 2 may be a helical coil having a body that is not coplanar with the terminals.

For another example, in terms of shape, in an embodiment, the first coil 2 and/or the first coil 2 may be a circular coil. In another embodiment, the first coil 2 and/or the first coil 2 may be a square coil.

It should be noted that the first coil 2 and the first coil 2 may be in the same horizontal plane (the horizontal plane refers to a plane parallel to a support surface of the powered device on the device), or in different horizontal planes. In the present embodiment, this is not limited.

Fig. 2 is an operational schematic diagram of a wireless charging device according to an exemplary embodiment of the present disclosure. The working principle of the wireless charging device provided by the present disclosure is described below with reference to fig. 2:

specifically, referring to fig. 2, by providing the first coil 2 and the first coil 2 in the wireless charging device, communication information can be transmitted through the first coil 2 and the receiving coil of the power receiving device, and energy can be transferred to the receiving coil of the power receiving device by coupling the first coil 2 and the receiving coil of the power receiving device. Therefore, the charging efficiency can be improved, the problem of frequent disconnected charging caused by weak coupling can be reduced, and the charging experience is improved. Further, by receiving the communication information by the coil independent of the transmitting coil, the reception processing capability of the wireless charging apparatus for the communication information from the power receiving apparatus can also be enhanced.

It should be noted that the communication information may include communication information in a handshake phase (after the handshake is successful, the wireless charging device starts to charge the powered device) and communication information during charging.

A charging method for charging a power receiving device by using the wireless charging device will be briefly described below with reference to fig. 1 and 2:

specifically, the charging management chip 1 is configured to enter a response waiting state when the first coil 2 senses that the powered device enters a charging range of the device, and determine that the handshake with the powered device is successful when the first coil receives a response message of the powered device in a response time period.

Specifically, when the powered device is placed in the charging range of the wireless charging device, the wireless charging device can sense the change of the surrounding magnetic field through the first coil 2, and at this time, the wireless charging management chip 1 controls the wireless charging device to enter a waiting response state (a handshaking phase);

further, at the same time, the powered device can also sense the change of the surrounding magnetic field through the internal receiving coil. And when the powered device senses the change of the surrounding magnetic field, the charging information (for example, the required charging voltage and the required charging current) of the device can be acquired, and then the response message carrying the charging information is transmitted to the wireless charging device through the receiving coil.

Correspondingly, if the wireless charging device receives a response message from the powered device through the first coil 2 in a response time period, it is determined that the handshake with the powered device is successful, and then the charging management chip 1 controls the first coil 2 to transmit energy to the powered device to start charging the powered device (it should be noted that after entering a waiting response state, if a response message is received in the response time period, the handshake is successful, and the wireless charging device starts to provide energy to the powered device based on a required voltage and a required current carried in the response message, otherwise, the handshake fails, and the wireless charging device does not provide energy).

It should be noted that, during the entire charging process, the wireless charging device may continuously communicate with the powered device, obtain charging information of the powered device, and then adjust the entire charging process (e.g., adjust a charging current or a charging voltage) based on the obtained charging information.

The wireless charging management chip 1 is further configured to receive charging information from the powered device through the first coil 2 during a charging process, and output a charging current matching the charging information to the first coil 2 based on the charging information, so as to transfer energy to the receiving coil through the first coil 2.

Of course, after the powered device is fully charged, it also sends a termination command to the wireless charging device, and the wireless charging device may receive the termination command through the first coil 2, and then stop supplying power to the powered device.

In other words, the charging management chip 1 is further configured to stop charging the powered device when receiving a termination instruction from the powered device through the first coil.

The wireless charging equipment that this embodiment provided through set up first coil and second coil in wireless charging equipment, makes the usable first coil of wireless charging equipment and powered device's receiving coil communication transmission communication information, through the second coil to receiving coil carries out energy transfer, and it is right to be right with the energy through the transmission the powered device charges, like this, not only can improve charge efficiency, can reduce the problem of frequently disconnected filling that leads to because of the coupling is weak, can improve the experience of charging. Further, the reception processing capability of the wireless charging apparatus for communication information from the power receiving apparatus can also be enhanced.

Optionally, in an embodiment, a distance between a projection point of the center point of the first coil 2 on the powered device supporting surface of the device and a projection point of the center point of the first coil 2 on the powered device supporting surface may be smaller than a preset threshold.

It should be noted that the preset threshold is set according to actual needs, and in this embodiment, a specific value of the preset threshold is not limited.

Specifically, the center point of first coil 2 is in the projection point of powered device holding surface with the center point of first coil 2 is in when the distance of the projection point of powered device holding surface can be less than the predetermined threshold value, can guarantee that first coil 2 and first coil 2 homoenergetic are well cooperated with the receiving coil of powered device. That is, when the first coil 2 is strongly coupled to the receiving coil, the communication capability between the first coil 2 and the receiving coil is also strong.

Preferably, in an embodiment, a projected point of the center point of the first coil 2 on the supporting surface of the power receiving device coincides with a projected point of the center point of the first coil 2 on the supporting surface of the power receiving device.

Fig. 3 is a top view of another wireless charging device shown in accordance with an example embodiment of the present disclosure. Referring to fig. 3, on the basis of the above embodiment, in the wireless charging device provided in this embodiment, the first coil 2 includes a single-turn coil; the first coil 2 comprises a plurality of coils wound from inside to outside along the circumferential direction by a wire, and the plurality of coils are in one plane.

In particular, the first coil 2 may be a Sniffer coil, which is used to detect high frequency signals.

It should be noted that, by the above arrangement, not only the cost can be reduced, but also the hardware space can be reduced.

Referring to fig. 3, in the example shown in fig. 3, the diameter of the first coil 2 is larger than the diameter of the first coil 2, a central point of the first coil 2 includes a hollow area, and the first coil 2 is accommodated in the hollow area.

Specifically, the hardware space can be further reduced by housing the first coil in the hollow region of the first coil.

Referring to fig. 3, in an embodiment, when the first coil 2 is accommodated in the hollow area, a center point of the first coil 2 coincides with a center point of the first coil 2.

Specifically, when the central point of the first coil 2 coincides with the central point of the first coil 2, it can be ensured that the first coil 2 and the first coil 2 can both be well matched with the receiving coil of the power receiving device.

An embodiment of the present disclosure further provides a wireless charging system, including any one of the foregoing wireless charging apparatuses and a powered device; wherein,

the wireless charging device communicates with a receiving coil of the power receiving device through a first coil to transmit communication information, and transfers energy to the receiving coil through a second coil to charge the power receiving device through the transferred energy.

Further, the charging management chip is configured to enter a response waiting state when the second coil senses that the powered device enters a charging range of the device, and determine that the handshake with the powered device is successful when the first coil receives a response message of the powered device in a response time period.

Fig. 4 is a schematic structural diagram of a power receiving apparatus according to an exemplary embodiment of the present disclosure. For example, the powered device may be a mobile phone or the like.

Referring to fig. 4, the powered device 400 may include one or more of the following components: processing components 402, memory 404, power components 406, multimedia components 408, audio components 410, input/output (I/O) interfaces 412, sensor components 414, and communication components 416.

The processing component 402 generally controls the overall operation of the powered device 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.

The memory 404 is configured to store various types of data to support operations at the powered device 400. Examples of such data include instructions for any application or method operating on powered device 400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 404 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power supply component 406 provides power to the various components of powered device 400. Power components 406 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for powered device 400.

The multimedia component 408 includes a screen that provides an output interface between the powered device 400 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front facing camera and/or a rear facing camera. When the powered device 400 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and/or the rear-facing camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 410 is configured to output and/or input audio signals. For example, the audio component 410 includes a Microphone (MIC) configured to receive an external audio signal when the powered device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

The I/O interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 414 includes one or more sensors for providing various aspects of state assessment for the powered device 400. For example, the sensor component 414 can detect the open/closed state of the powered device 400, the relative positioning of the components, such as a display and keypad of the powered device 400, the sensor component 414 can also detect a change in the position of the powered device 400 or a component of the powered device 400, the presence or absence of user contact with the powered device 400, the orientation or acceleration/deceleration of the powered device 400, and a change in the temperature of the powered device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 416 is configured to facilitate wired or wireless communication between the powered device 400 and other devices. Powered device 400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, powered device 400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components for performing the methods described in any of the above embodiments.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 404 comprising instructions, executable by the processor 420 of the powered device 400 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A wireless charging device is characterized by comprising a first coil and a second coil which are connected with a charging management chip; wherein,

2. The wireless charging device of claim 1, wherein the first coil comprises a single turn coil; the second coil comprises a plurality of coils wound from inside to outside along the circumferential direction by a lead, a hollow area is arranged at the central point of the plurality of coils, and the first coil is accommodated in the hollow area.

3. The wireless charging device of claim 1, wherein the charging management chip is configured to enter a wait-for-response state when a powered device is sensed to enter a charging range of the device through the second coil, and determine that a handshake with the powered device is successful when a response message of the powered device is received through the first coil in a response time period.

4. The wireless charging device of claim 3, wherein the charging management chip is further configured to output a charging current matching the required current and the required voltage to the second coil for energy transfer to the receiving coil through the second coil based on the required current and the required voltage carried in the response message after determining that the handshake with the powered device is successful.

5. The wireless charging device according to claim 3, wherein the charging management chip is further configured to receive charging information from the powered device through the first coil during charging, and output a charging current matching the charging information to the second coil based on the charging information, so as to transfer energy to the receiving coil through the second coil.

6. The wireless charging device according to claim 3, wherein the charging management chip is further configured to stop charging the powered device when a termination instruction is received from the powered device through the first coil.

7. A wireless charging system is characterized by comprising a wireless charging device and a powered device; wherein,

the wireless charging equipment comprises a first coil and a second coil which are connected with a charging management chip;

8. The wireless charging system of claim 7, wherein the first coil comprises a single turn coil; the second coil comprises a plurality of coils wound from inside to outside along the circumferential direction by a lead, a hollow area is arranged at the central point of the plurality of coils, and the first coil is accommodated in the hollow area.

9. The wireless charging system of claim 7, wherein the charging management chip is configured to enter a wait-for-response state when a powered device is sensed to enter a charging range of the device by the second coil, and determine that a handshake with the powered device is successful when a response message of the powered device is received by the first coil within a response time period.

10. The wireless charging system of claim 9, wherein the charging management chip is further configured to output a charging current matching the required current and the required voltage to the second coil for energy transfer to the receiving coil through the second coil based on the required current and the required voltage carried in the response message after determining that the handshake with the powered device is successful.