CN117996974A - Wireless charging device and wireless charging method - Google Patents

Abstract

The disclosure relates to a wireless charging device and a wireless charging method, and relates to the field of wireless charging. The device is applied to a back shell of terminal equipment and comprises: the first coil and the second coil are connected through a control circuit; and the magnetic shielding assembly is arranged between the first coil and the second coil.

Description

Wireless charging device and wireless charging method

Technical Field

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

Background

With the development of wireless technology, charging a terminal by wireless charging has become a first choice, and wireless charging mainly realizes wireless transmission of electric energy through electromagnetic field coupling between a transmitting coil of a transmitting end and a receiving coil of a receiving end. How does it avoid the back shell from impeding electromagnetic field coupling after the terminal is sleeved with the back shell? In the related art, a coil is provided in the back shell so that a magnetic field can pass through the back shell coil.

However, the existing back shell scheme can realize that wireless charging cannot realize infinite reverse charging, or can realize that wireless reverse charging cannot realize wireless charging, or can realize that wireless charging and infinite direction charging can be realized, but the back shell cannot be used or damage a terminal because the international standard wireless electromagnetic field intensity is not authenticated.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides a wireless charging device and a wireless charging method.

According to a first aspect of embodiments of the present disclosure, there is provided a wireless charging device, applied to a back shell of a terminal device, including a first coil and a second coil, connected by a control circuit; and the magnetic shielding assembly is arranged between the first coil and the second coil.

In one embodiment, the control circuit includes a first switch and a second switch; the first coil and the second coil are connected in series or in parallel by opening and/or closing the first switch and the second switch.

In another embodiment, the control circuit includes a first rectifying circuit and an inverter circuit, the first rectifying circuit is connected with the first coil, the inverter circuit is connected with the second coil, and the first rectifying circuit and the inverter circuit are connected in series; the first coil and the second coil transmit current signals through the first rectifying circuit and the inverter circuit.

In another embodiment, the wireless charging device further comprises a second rectifying circuit, and the second rectifying circuit is connected in parallel with the control circuit; the second rectifying circuit is used for rectifying the alternating current signal transmitted in the control circuit into a direct current signal and supplying power for the back shell.

In another embodiment, the wireless charging device further comprises a third switch and a fourth switch; the control circuit and the second rectifying circuit transmit alternating current signals through the closing of the third switch; the second rectifying circuit and the back shell transmit direct current signals through the closing of the fourth switch.

In another embodiment, the wireless charging device further includes a voltage regulating circuit, one end of the voltage regulating circuit is connected to the first rectifying circuit, and the other end of the voltage regulating circuit is connected to the inverter circuit.

In another embodiment, the magnetic shielding component is a wire made of a plurality of nanocrystalline materials, and the wire is wound on the outer layers of the first coil and the second coil respectively.

In another embodiment, the magnetic shielding component is made of a plurality of nanocrystalline materials, and the middle part of the magnetic shielding component is hollowed.

According to a second aspect of the embodiments of the present disclosure, there is provided a wireless charging method applied to a back case of a terminal device, the back case including a first coil, a second coil, and a magnetic shield assembly disposed between the first coil and the second coil, including: acquiring a first induction current generated by the first coil according to an alternating magnetic field sent by a sending end; the induced current is transmitted to the second coil through the control circuit, and the first induced current is coupled to the receiving end through the second coil.

In one embodiment, the control circuit includes a first switch and a second switch; the transmitting the first induced current to the second coil by a control circuit includes: the first induced current is transmitted to the second coil when the first switch and the second switch are closed.

In yet another embodiment, the control circuit includes a first rectifying circuit and an inverter circuit; the transmitting the first induced current to the second coil by a control circuit includes: rectifying the first induced current into a first direct current through the first rectifying circuit, inverting the first direct current into the first induced current through the inverting circuit, and transmitting the first induced current to the second coil.

In another embodiment, the back shell further includes a second rectifying circuit therein, and the method further includes: and acquiring a second induced current from the control circuit through the second rectifying circuit, rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell.

In another embodiment, the back shell further comprises a third switch and a fourth switch; the obtaining, by the second rectifying circuit, the second induced current transmitted in the control circuit includes: when the third switch is closed, a second induction current is obtained from the control circuit through a second rectifying circuit; the rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell comprises: and when the fourth switch is closed, rectifying the second induced current into direct current and transmitting the direct current into the back shell.

In another embodiment, the control circuit further comprises a voltage regulating circuit; after the rectifying the first induced current to a first direct current by a first rectifying circuit, the method further comprises: and inputting the first direct current into the voltage regulating circuit to obtain the first direct current after voltage regulation.

In another embodiment, when the terminal device is in a wireless charging state, the transmitting end is a coil in a device different from the terminal device, and the receiving end is a coil in the terminal device.

In another embodiment, when the terminal device is in a wireless reverse charging state, the transmitting end is a coil in the terminal device, and the receiving end is a coil in a device different from the terminal device.

A fourth aspect of the present disclosure provides a wireless charging device applied to a back shell of a terminal device, the device including: the acquisition module is used for acquiring a first induction current generated by the first coil according to the alternating magnetic field sent by the sending end; and the transmission module is used for transmitting the first induction current to the second coil through the control circuit and coupling the first induction current to the receiving end through the second coil.

In one embodiment, the control circuit includes a first switch and a second switch; the transmission module is specifically configured to transmit the first induced current to the second coil when the first switch and the second switch are closed.

In yet another embodiment, the control circuit includes a first rectifying circuit and an inverter circuit; the transmission module is specifically configured to rectify the first induced current into a first direct current through the first rectifying circuit, invert the first direct current into the first induced current through the inverting circuit, and transmit the first induced current to the second coil.

In another embodiment, the back shell further includes a second rectifying circuit, and the transmission module is further configured to obtain a second induced current from the control circuit through the second rectifying circuit, rectify the second induced current into a second direct current, and transmit the second direct current to the back shell.

In another embodiment, the back shell further comprises a third switch and a fourth switch; the transmission module is specifically configured to obtain a second induced current from the control circuit through a second rectifying circuit when the third switch is closed; and when the fourth switch is closed, rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell.

In another embodiment, the control circuit further comprises a voltage regulating circuit;

The transmission module is further configured to input the first direct current into the voltage regulation circuit, and obtain the first direct current after voltage regulation.

In another embodiment, when the terminal device is in a wireless charging state, the transmitting end is a coil in a device different from the terminal device, and the receiving end is a coil in the terminal device.

In another embodiment, when the terminal device is in a wireless reverse charging state, the transmitting end is a coil in the terminal device, and the receiving end is a coil in a device different from the terminal device.

A fourth aspect of the present disclosure provides a wireless charging apparatus, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the wireless charging method according to the second aspect and embodiments thereof described above.

A fifth aspect of the present disclosure provides a computer readable storage medium, which when executed by a processor, performs the wireless charging method according to the second aspect and embodiments thereof.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: the back shell is internally provided with a first coil and a second coil, the first coil and the second coil are connected through a control circuit, and a magnetic shielding assembly is arranged between the first coil and the second coil. The magnetic shielding assembly is arranged between the first coil and the second coil, so that the radiation influence of a magnetic field on the terminal can be avoided, induced current is generated when the first coil senses the magnetic field sent by the transmitting coil, the induced current is transmitted to the second coil through the control circuit, and the second coil couples the induced current to the receiving coil, so that wireless charging and infinite reverse charging can be realized after the terminal is sleeved with the back shell.

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 disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a block diagram showing a related art back shell coil according to an exemplary embodiment.

Fig. 2 is a block diagram showing another related art back shell coil according to an exemplary embodiment.

Fig. 3 is a block diagram showing another related art back shell coil according to an exemplary embodiment.

Fig. 4 is a block diagram illustrating a wireless charging apparatus according to an exemplary embodiment.

Fig. 5 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 6 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 7 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 8 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 9 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 10 is a block diagram illustrating another wireless charging apparatus according to an exemplary embodiment.

Fig. 11 is a flowchart illustrating a wireless charging method according to an exemplary embodiment.

Fig. 12 is a block diagram of a wireless charging system according to an exemplary embodiment.

Fig. 13 is a block diagram illustrating a wireless charging system according to an exemplary embodiment.

Fig. 14 is a block diagram illustrating an apparatus for wireless charging according to an example embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure.

The current back shell scheme can realize that wireless charging can not realize unlimited reverse charging, or can realize that wireless reverse charging can not realize wireless charging, or can realize that wireless charging and unlimited direction charge but because the wireless electromagnetic field intensity of international standard passes authentication, the back shell can not be used or damage the terminal.

Several related art backshell schemes are given by way of example below:

as shown in fig. 1, the back-case coil is free of a magnetic shielding material, and the magnetic field of the TX (transmitting) coil penetrates through the back-case coil into the terminal coil, thereby enabling wireless charging of the terminal; meanwhile, the terminal can start wireless reverse charging, and the magnetic field of the terminal coil passes through the back shell coil and enters coils in other terminal devices to wirelessly charge the other terminal devices. However, the existence of the magnetic shielding material is not enough, so that the wireless electromagnetic field intensity of the international standard is not authenticated, and the back shell cannot be used for wireless charging or wireless reverse charging.

As shown in fig. 2, the front surface of the back shell coil is attached with a magnetic shielding material, that is, the magnetic shielding material is attached between the TX coil and the back shell coil. The terminal starts wireless reverse charging, and the back shell coil cannot penetrate through magnetic shielding materials to provide energy for the TX coil after receiving the energy, so that other terminal equipment cannot be charged, and only other modules in the back shell can be supplied with power, such as a camera light supplementing module of the ring flash light supplementing back shell; and the terminal is sleeved on the back shell, so that wireless charging cannot be performed, and the electromagnetic field of TX cannot pass through the magnetic shielding material outside the back shell.

As shown in fig. 3, the back of the back shell coil is attached with a magnetic shielding material, i.e. the magnetic shielding material is arranged between the back shell coil and the terminal. The terminal is sleeved with the back shell, when the back shell coil receives the magnetic field sent by the TX coil, the magnetic field can only be converted into energy, and the energy is charged to the terminal through the wired charging interface of the back shell, so that the power cannot be reversely supplied to the back shell self module, the other terminals cannot be reversely charged, the back shell can only be directly charged in a wireless manner, and the terminal is charged in a wired manner through the wired interface.

Based on the technical problem, the present disclosure provides a wireless charging device, in which a first coil and a second coil are disposed in a back shell, the first coil and the second coil are connected through a control circuit, and a magnetic shielding assembly is disposed between the first coil and the second coil. The magnetic shielding assembly is arranged between the first coil and the second coil, so that the radiation influence of a magnetic field on the terminal can be avoided, induced current is generated when the first coil senses the magnetic field sent by the transmitting coil, the induced current is transmitted to the second coil through the control circuit, and the second coil couples the induced current to the receiving coil, so that wireless charging and infinite reverse charging can be realized after the terminal is sleeved with the back shell.

Fig. 4 is a block diagram of a wireless charging apparatus according to an exemplary embodiment, and as shown in fig. 4, the wireless charging apparatus is applied to a back case of a terminal device, and includes:

The first coil 1 and the second coil 2 are connected through a control circuit 3;

The magnetic shield assembly 4 is disposed between the first coil 1 and the second coil 2.

As a possible implementation manner, the magnetic shielding component 4 is a wire made of a plurality of nanocrystalline materials, and the wire is respectively wound on the outer layers of the first coil and the second coil, so as to save space occupation.

As another possible implementation manner, the magnetic shielding component 4 is made of a plurality of nanocrystalline materials, and the middle part of the magnetic shielding component 4 is hollowed-out so as to increase the magnetic permeability.

In an exemplary embodiment, the magnetic shielding component 4 is a cuboid made of a plurality of nanocrystalline materials, and the middle part of the cuboid is hollowed.

The embodiment of the disclosure provides a wireless charging device, a first coil and a second coil are arranged in a back shell, the first coil and the second coil are connected through a control circuit, and a magnetic shielding assembly is arranged between the first coil and the second coil. The magnetic shielding assembly is arranged between the first coil and the second coil, so that the radiation influence of a magnetic field on the terminal can be avoided, induced current is generated when the first coil senses the magnetic field sent by the transmitting coil, the induced current is transmitted to the second coil through the control circuit, and the second coil couples the induced current to the receiving coil, so that wireless charging and infinite reverse charging can be realized after the terminal is sleeved with the back shell.

As a possible implementation, the control circuit 3 includes a first switch and a second switch; the first coil 1 and the second coil 2 are connected in series or in parallel by opening and/or closing the first switch and the second switch.

Illustratively, as shown in fig. 5, the first switch 31 is connected in series with the second switch 32, and the first coil and the second coil are connected in series when the first switch 31 and the second switch 32 are closed. When the first switch 31 and the second switch 32 are closed, as shown in fig. 6, the control circuit is turned on, the induced current is transmitted in the control circuit, and when the induced current flows through the first coil 1, the first coil 1 couples the induced current to the coil in the receiving end, and the first coil 1 corresponds to a relay stub.

Of course, the first coil 1 and the second coil 2 may be arbitrarily connected through the first switch 31 and the second switch 32, so long as the control circuit is turned on, the current generated by the first coil 1 may be transmitted to the second coil 2 through the control circuit 3, and the embodiment of the disclosure is not limited.

As another possible implementation manner, as shown in fig. 7, the control circuit 3 includes a first rectifying circuit 33 and an inverter circuit 34, where the first rectifying circuit 33 is connected to the first coil 1, the inverter circuit 34 is connected to the second coil 2, and the first rectifying circuit 33 and the inverter circuit 34 are connected in series; the first coil 1 and the second coil 2 transmit current signals through the first rectifying circuit 33 and the inverter circuit 34.

Because the transformer is arranged in the rectifying circuit and the inverting circuit, the transformer comprises coils, the process of transmitting the first induced current through the first rectifying circuit and the inverting circuit is basically energy coupling, when the first coil senses a magnetic field, the first induced current is generated, the first induced current is alternating current, the alternating current is coupled to an input coil in the first rectifying circuit, the direct current is rectified and output through the first rectifying circuit, the direct current is coupled to an input coil of the inverting circuit, the direct current is inverted into alternating current through the inverting circuit and transmitted to a second coil, and the second coil couples the alternating current to a receiving end, so that wireless charging and wireless reverse charging are realized.

Further, as shown in fig. 8, the wireless charging device further includes a voltage regulating circuit 5, one end of the voltage regulating circuit 5 is connected to the first rectifying circuit 33, and the other end of the voltage regulating circuit 5 is connected to the inverter circuit 34.

The voltage regulating circuit can be a BUCK-BOOST circuit. The BUCK-BOOST circuit is a commonly used DC/DC converter circuit, and its output voltage may be either lower or higher than the input voltage, and the polarity of the output voltage is opposite to the input voltage.

In the embodiment of the disclosure, since the magnitude of the induced current generated by the magnetic field sent by the receiving end may be different from that of the induced current required by the receiving end, the direct current is adjusted to the direct current supported by the receiving end through the voltage regulating circuit, so that the damage of the terminal equipment of the receiving end is avoided.

In some embodiments, since there are some modules that need to be charged, such as a camera light compensation module, in the back shell, the power transmitted in the control circuit can be split into a part to charge other modules in the back shell.

In a possible implementation manner, as shown in fig. 9, the wireless charging device may further include a second rectifying circuit 6, where the second rectifying circuit 6 is connected in parallel with the control circuit 3; the second rectifying circuit 6 is configured to rectify the ac signal transmitted in the control circuit 3 into a dc signal, and supply power to the back shell.

Of course, if operation of the second rectifying circuit is not desired, the control circuit may be isolated from the second rectifying circuit by a separate device, and then operated when operation of the second rectifying circuit is required.

Based on this, as shown in fig. 10, the wireless charging device may further include a third switch 35 and a fourth switch 36; the control circuit 3 and the second rectifying circuit 6 transmit an alternating current signal by the closing of the third switch 35; the second rectifying circuit 6 and other modules in the back shell transmit direct current signals through the closing of the fourth switch 36, thereby realizing power supply.

The second rectifying circuit in the back shell can be used as a receiving end to generate direct current to supply power to other modules in the back shell no matter whether the terminal is in wireless charging or wireless reverse charging.

According to the embodiment of the disclosure, the switching device is arranged, when the electric quantity of the terminal equipment is low, the switching device can be controlled to be opened so that the second rectifying circuit does not work, all energy charges the terminal equipment, when the electric quantity of the terminal equipment is saturated, the switching device is controlled to be closed so that the second rectifying circuit rectifies part of energy into alternating current to charge other modules in the back shell, and intelligent charging is achieved.

Further, an embodiment of the present disclosure further provides a wireless charging method for charging by using the above wireless charging device, and fig. 11 is a flowchart of a wireless charging method according to an exemplary embodiment, where the wireless charging method is used in a back shell of a terminal, and the back shell includes a first coil, a second coil, and a magnetic shielding assembly disposed between the first coil and the second coil, as shown in fig. 11, and includes the following steps.

In step S11, a first induced current generated by the first coil according to the alternating magnetic field transmitted from the transmitting end is acquired.

In step S12, the induced current is transmitted to the second coil through the control circuit, and the first induced current is coupled to the receiving terminal through the second coil.

When the terminal is in a wireless charging state, the sending end is a coil in a device different from the terminal, and the receiving end is a coil in the terminal. When the terminal is in a wireless reverse charging state, the transmitting end is a coil in the terminal, and the receiving end is a coil in a device different from the terminal.

Specifically, when the terminal is in a wireless charging state, coils in other terminal devices send magnetic fields to the first coil, the first coil generates induction current when inducing the magnetic fields, the induction current is transmitted to the second coil through the control circuit, and when the second coil receives the induction current, the induction current is coupled to the terminal coils in the terminal devices, so that wireless charging is realized. Similarly, the terminal is in a wireless reverse charging state.

According to the embodiment of the disclosure, the magnetic shielding assembly is arranged between the first coil and the second coil, so that the radiation influence of a magnetic field on the terminal can be avoided, the first coil senses the magnetic field sent by the transmitting end and generates induction current, the control circuit transmits the induction current to the second coil, and the second coil couples the induction current to the receiving end, so that wireless charging and infinite reverse charging can be realized after the terminal is sleeved with the back shell.

In some embodiments, the control circuit includes a first switch and a second switch that, when closed, transmit a first induced current to the second coil.

According to the embodiment of the disclosure, the switch is arranged, when the switch is closed, the control circuit is conducted, and the first coil and the second coil can transmit first induction current through the control circuit, so that wireless charging or wireless reverse charging is realized.

In other embodiments, the control circuit includes a first rectifying circuit and an inverter circuit; the first induced current is rectified into a first direct current through the first rectifying circuit, and the first direct current is inverted into the first induced current through the inverting circuit and is transmitted to the second coil.

Optionally, since other modules needing to be charged are also present in the back shell, when the terminal is subjected to wireless charging or infinite reverse charging, the second induction current can be obtained from the control circuit through the second rectification circuit, and the second induction current is rectified into the second direct current and is transmitted to the back shell.

Further, the wireless charging device further comprises a third switch and a fourth switch, when the third switch is closed, the second induction current is obtained from the control circuit through the second rectifying circuit, and when the fourth switch is closed, the second induction current is rectified into a second direct current and transmitted to the back shell.

When the third switch and the fourth switch are closed, the current is obtained from the control circuit to supply power to other modules inside the back shell.

In some embodiments, the control circuit further comprises a voltage regulating circuit, the method further comprising, after rectifying the first induced current to a first direct current by the first rectifying circuit: and inputting the first direct current into the voltage regulating circuit to obtain the first direct current after voltage regulation. And then the regulated direct current is inverted into induced current, so that the condition that equipment is damaged due to different currents required by a sending end and a receiving end is avoided.

Optionally, when the terminal is in wireless reverse charging, OTG of the terminal can be used first, electric energy is transmitted to the back shell through the wired socket, the back shell converts the electric energy into an alternating current signal through the inverter circuit in the control circuit and transmits the alternating current signal to the second coil, and the second coil couples the alternating current signal to the coil of other terminal equipment to realize wireless reverse charging.

In order to describe in more detail a wireless charging method provided by the present disclosure, two aspects of wireless charging and infinite reverse charging from a terminal are described below, and as shown in fig. 12, a complete wireless charging system is provided, including a terminal coil, a wireless charging device provided by an embodiment of the present disclosure, and coils in other terminal devices. When the terminal is in a wireless charging state, the second coil 2 senses an alternating magnetic field sent by other coils to generate induction current, the induction current is transmitted to the first coil 1 through the control circuit 3, the first coil 1 couples the induction current to the terminal coil, and the terminal coil receives the induction current to charge the terminal. When the terminal is in a wireless recoil state, the first coil 1 senses an alternating magnetic field sent by other coils to generate an induction current, the induction current is transmitted to the second coil 2 through the control circuit 3, the second coil 2 couples the induction current to coils in other equipment needing to be charged, and the coils in other equipment needing to be charged receive the induction current to charge the equipment.

According to the embodiment of the disclosure, the magnetic shielding assembly is arranged between the first coil and the second coil to avoid radiation influence of a magnetic field on the terminal, induced current is generated when the first coil senses the magnetic field sent by the transmitting coil, meanwhile, the induced current is transmitted to the second coil through the control circuit, and the second coil couples the induced current to the receiving coil, so that wireless charging and infinite reverse charging can be achieved after the terminal is sleeved with the back shell.

Based on the same conception, the embodiment of the disclosure also provides a wireless charging device.

It will be appreciated that, in order to achieve the above-mentioned functions, the wireless charging device provided in the embodiments of the present disclosure includes corresponding hardware structures and/or software modules that perform the respective functions. The disclosed embodiments may be implemented in hardware or a combination of hardware and computer software, in combination with the various example elements and algorithm steps disclosed in the embodiments of the disclosure. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the embodiments of the present disclosure.

Fig. 13 is a block diagram of a wireless charging device, according to an example embodiment. Referring to fig. 13, the apparatus includes an acquisition module 1301 and a transmission module 1302.

An obtaining module 1301, configured to obtain a first induced current generated by the first coil according to the alternating magnetic field sent by the sending end; the transmission module 1302 is configured to transmit the first induced current to the second coil through the control circuit, and couple the first induced current to the receiving end through the second coil.

In one embodiment, the control circuit includes a first switch and a second switch; the transmission module 1302 is specifically configured to transmit the first induced current to the second coil when the first switch and the second switch are closed.

In yet another embodiment, the control circuit includes a first rectifying circuit and an inverter circuit; the transmission module 1302 is specifically configured to rectify the first induced current into a first direct current through a first rectifying circuit, invert the first direct current into the first induced current through an inverting circuit, and transmit the first induced current to the second coil.

In another embodiment, the back shell further includes a second rectifying circuit, and the transmission module 1302 is further configured to obtain a second induced current from the control circuit through the second rectifying circuit, rectify the second induced current into a second direct current, and transmit the second direct current to the back shell.

In another embodiment, the back shell further comprises a third switch and a fourth switch; the transmission module 1302 is specifically configured to obtain, when the third switch is closed, a second induced current from the control circuit through the second rectifying circuit; when the fourth switch is closed, the second induced current is rectified into a second direct current and transmitted into the back shell.

In another embodiment, the control circuit further comprises a voltage regulating circuit; the transmission module 1302 is further configured to input the first direct current to the voltage regulation circuit, and obtain the first direct current after voltage regulation.

In another embodiment, when the terminal device is in a wireless charging state, the transmitting end is a coil in a device different from the terminal device, and the receiving end is a coil in the terminal device.

In another embodiment, when the terminal device is in the wireless reverse charging state, the transmitting end is a coil in the terminal device, and the receiving end is a coil in a device different from the terminal device.

Fig. 14 is a block diagram illustrating an apparatus 100 for wireless charging according to an example embodiment. For example, the apparatus 100 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like.

Referring to fig. 14, the apparatus 100 may include one or more of the following components: a processing component 102, a memory 104, a power component 106, a multimedia component 108, an audio component 110, an input/output (I/O) interface 112, a sensor component 114, and a communication component 116.

The processing component 102 generally controls overall operation of the device 100, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 102 may include one or more processors 120 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 102 can include one or more modules that facilitate interactions between the processing component 102 and other components. For example, the processing component 102 may include a multimedia module to facilitate interaction between the multimedia component 108 and the processing component 102.

The memory 104 is configured to store various types of data to support operations at the apparatus 100. Examples of such data include instructions for any application or method operating on the device 100, contact data, phonebook data, messages, pictures, videos, and the like. The memory 104 may be implemented by any type or combination of volatile or nonvolatile 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 disk.

The power component 106 provides power to the various components of the device 100. The power components 106 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 100.

The multimedia component 108 includes a screen between the device 100 and the user that provides an output interface. 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 input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 108 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 100 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 110 is configured to output and/or input audio signals. For example, the audio component 110 includes a Microphone (MIC) configured to receive external audio signals when the device 100 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 104 or transmitted via the communication component 116. In some embodiments, the audio component 110 further comprises a speaker for outputting audio signals.

The I/O interface 112 provides an interface between the processing component 102 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 114 includes one or more sensors for providing status assessment of various aspects of the device 100. For example, the sensor assembly 114 may detect the on/off state of the device 100, the relative positioning of the components, such as the display and keypad of the device 100, the sensor assembly 114 may also detect a change in position of the device 100 or a component of the device 100, the presence or absence of user contact with the device 100, the orientation or acceleration/deceleration of the device 100, and a change in temperature of the device 100. The sensor assembly 114 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 114 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 114 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 116 is configured to facilitate communication between the apparatus 100 and other devices in a wired or wireless manner. The device 100 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 116 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 116 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, the apparatus 100 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, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 104, including instructions executable by processor 120 of apparatus 100 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

It is understood that the term "plurality" in this disclosure means two or more, and other adjectives are similar thereto. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It is further understood that the terms "first," "second," and the like are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the expressions "first", "second", etc. may be used entirely interchangeably. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "center," "longitudinal," "transverse," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation.

It will be further understood that "connected" includes both direct connection where no other member is present and indirect connection where other element is present, unless specifically stated otherwise.

It will be further understood that although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous.

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 application is intended to cover any adaptations, 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 to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims (19)

1. A wireless charging device, characterized in that it is applied in a back shell of a terminal device, the wireless charging device comprising:

The first coil and the second coil are connected through a control circuit;

and the magnetic shielding assembly is arranged between the first coil and the second coil.

2. The wireless charging device of claim 1, wherein the control circuit includes a first switch and a second switch;

the first coil and the second coil are connected in series or in parallel by opening and/or closing the first switch and the second switch.

3. The wireless charging device according to claim 1, wherein the control circuit includes a first rectifying circuit and an inverter circuit, the first rectifying circuit is connected to the first coil, the inverter circuit is connected to the second coil, and the first rectifying circuit and the inverter circuit are connected in series;

The first coil and the second coil transmit current signals through the first rectifying circuit and the inverter circuit.

4. A wireless charging device according to claim 2 or 3, further comprising a second rectifying circuit connected in parallel with the control circuit;

the second rectifying circuit is used for rectifying the alternating current signal transmitted in the control circuit into a direct current signal and supplying power for the back shell.

5. The wireless charging device of claim 4, further comprising a third switch and a fourth switch;

the control circuit and the second rectifying circuit transmit alternating current signals through the closing of the third switch;

the second rectifying circuit and the back shell transmit direct current signals through the closing of the fourth switch.

6. The wireless charging device of claim 3, further comprising a voltage regulating circuit, wherein one end of the voltage regulating circuit is connected to the first rectifying circuit, and the other end of the voltage regulating circuit is connected to the inverter circuit.

7. The wireless charging device of claim 5 or 6, wherein the magnetic shielding assembly is a plurality of wires of nanocrystalline material wound around the outer layers of the first and second coils, respectively.

8. The wireless charging device of claim 5 or 6, wherein the magnetic shielding assembly is composed of a plurality of nanocrystalline materials, and the middle part of the magnetic shielding assembly is hollow.

9. A wireless charging method, characterized in that it is applied to a back shell of a terminal device, the back shell including a first coil, a second coil, and a magnetic shielding assembly disposed between the first coil and the second coil, the method comprising:

acquiring a first induction current generated by the first coil according to an alternating magnetic field sent by a sending end;

the first induced current is transmitted to the second coil through the control circuit, and the first induced current is coupled to the receiving end through the second coil.

10. The method of claim 9, wherein the control circuit comprises a first switch and a second switch;

the transmitting the first induced current to the second coil by a control circuit includes:

The first induced current is transmitted to the second coil when the first switch and the second switch are closed.

11. The method of claim 10, wherein the control circuit comprises a first rectifying circuit and an inverter circuit;

the transmitting the first induced current to the second coil by a control circuit includes:

Rectifying the first induced current into a first direct current through the first rectifying circuit, inverting the first direct current into the first induced current through the inverting circuit, and transmitting the first induced current to the second coil.

12. The method of claim 10 or 11, wherein the back shell further comprises a second rectifying circuit therein, the method further comprising:

And acquiring a second induced current from the control circuit through the second rectifying circuit, rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell.

13. The method of claim 12, further comprising a third switch and a fourth switch in the back shell;

the obtaining, by the second rectifying circuit, the second induced current transmitted in the control circuit includes:

When the third switch is closed, a second induction current is obtained from the control circuit through a second rectifying circuit;

The rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell comprises:

And when the fourth switch is closed, rectifying the second induced current into a second direct current and transmitting the second direct current into the back shell.

14. The method of claim 11, wherein the control circuit further comprises a voltage regulation circuit;

After the rectifying the first induced current to a first direct current by a first rectifying circuit, the method further comprises:

and inputting the first direct current into the voltage regulating circuit to obtain the first direct current after voltage regulation.

15. A method according to claim 13 or 14, characterized in that the transmitting end is a coil in a device different from the terminal device and the receiving end is a coil in the terminal device when the terminal device is in a wireless charging state.

16. The method according to claim 13 or 14, wherein the transmitting end is a coil in the terminal device and the receiving end is a coil in a device different from the terminal device when the terminal device is in a wireless reverse charging state.

17. A wireless charging device for use in a back shell of a terminal device, the device comprising:

The acquisition module is used for acquiring a first induction current generated by the first coil according to the alternating magnetic field sent by the sending end;

And the transmission module is used for transmitting the first induction current to the second coil through the control circuit and coupling the first induction current to the receiving end through the second coil.

18. A wireless charging device, comprising:

A processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the wireless charging method of any of claims 9-16.

19. A non-transitory computer readable storage medium, which when executed by a processor, performs the wireless charging method of any of claims 9-16.