HK40011285B - Wireless charging apparatus, device to be charged and control method therefor - Google Patents

Description

Wireless charging device, equipment to be charged and control method thereof

The present application claims priority from the chinese patent office filed on 7 of 4 months 2017, PCT application number PCT/CN2017/079784, the invention name "wireless charging system, apparatus, method and device to be charged", and the PCT application filed on 13 months 2017, 4 months, the chinese patent office, application number PCT/CN2017/080334, the invention name "device to be charged and method to be charged", the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of wireless charging, and more particularly, to a wireless charging apparatus, a device to be charged, and a control method thereof.

Background

With the popularization of wireless charging technology, more and more electronic devices support a wireless charging function.

In a wireless charging process, a wireless charging device (e.g., a wireless charging base) typically uses a transmitting coil to transmit a wireless charging signal (electromagnetic signal).

The traditional transmitting coil is formed by coiling a plurality of turns of coils, but the design mode of the traditional transmitting coil is single, so that the wireless charging process is not flexible enough.

Disclosure of Invention

The application provides a wireless charging device, equipment to be charged and a control method thereof, so as to improve flexibility of a wireless charging process.

In a first aspect, a wireless charging apparatus is provided, comprising: a wireless transmitting circuit; a transmitting coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different; and the control circuit is used for selecting one pair of connectors from the plurality of pairs of connectors, and the one pair of connectors are electrically connected with the wireless transmitting circuit.

In a second aspect, there is provided a device to be charged, comprising: a receiving coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different; a wireless receiving circuit; and the control circuit is used for selecting one pair of connectors from the plurality of pairs of connectors, and the one pair of connectors are electrically connected with the wireless receiving circuit.

In a third aspect, there is provided a control method of a wireless charging device including: a wireless transmitting circuit; a transmitting coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different; the control method comprises the following steps: a pair of contacts is selected from a plurality of pairs of contacts that are electrically connected to the wireless transmit circuit.

In a fourth aspect, there is provided a control method of an apparatus to be charged, the apparatus to be charged including: a receiving coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different; a wireless receiving circuit; the control method comprises the following steps: a pair of contacts is selected from a plurality of pairs of contacts that are electrically connected to the wireless receiving circuit.

The transmitting coil provided by the application is provided with a plurality of pairs of joints, and the control circuit can select and switch among the pairs of joints according to actual needs, so that the flexibility of a wireless charging process is improved.

Drawings

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

Fig. 2 is a diagram illustrating a structure of a transmitting coil according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a wireless charging device according to another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a wireless charging device according to still another embodiment of the present application.

Fig. 5 is a schematic structural diagram of a device to be charged provided in one embodiment of the present application.

Fig. 6 is a schematic structural view of a device to be charged provided in another embodiment of the present application.

Fig. 7 is a schematic flowchart of a control method of a wireless charging device provided in an embodiment of the present application.

Fig. 8 is a schematic flowchart of a control method of a device to be charged provided in an embodiment of the present application.

Detailed Description

The wireless charging device 10 according to the embodiment of the present application may be a wireless charging base, or may be a chip system. The wireless charging device 10 provided in the embodiment of the present application is described in detail below with reference to fig. 1.

As shown in fig. 1, the wireless charging device 10 may include a wireless transmit circuit 12, a transmit coil 14, and a control circuit 16. The form and function of the components within the wireless charging device 10 are described in detail below.

The wireless transmit circuit 12 may generate a wireless charging signal through the transmit coil 14. Specifically, the wireless transmitting circuit 12 may include a high-frequency oscillation circuit, and the wireless transmitting circuit 12 may generate a high-frequency oscillation signal based on the high-frequency oscillation circuit and transmit out through the transmitting coil 14 to form a wireless charging signal.

The transmit coil 14 has multiple pairs of taps (the wires may be routed out of a location of the transmit coil 14 to form a tap), and the number of turns of the coil defined by the different tap pairs is different. The specific location of the connector in the transmitter coil 14 may be flexibly set according to actual needs, such as may be located in one or more of the following locations of the transmitter coil 14: a start position, an end position, and any position in between. Each pair of taps in the transmit coil 14 may define a coil having a number of turns. The coil defined by a pair of joints is a coil in which one joint of the pair of joints is used as a starting position and the other joint is used as an ending position.

The number of pairs of connectors included in the transmitter coil 14 is not particularly limited in this embodiment, and may include 2 pairs of connectors, or may include 3 or more pairs of interfaces, for example.

Fig. 2 shows one possible design of the transmitting coil. As shown in fig. 2, the transmitting coil 14 includes 3 joints, namely joint 1, joint 2, and joint 3 shown in fig. 2. The joint 2 is located at the start position (or innermost side) of the transmitting coil 14, the joint 1 is located at the end position (or outermost side) of the transmitting coil 14, and the joint 3 is located at the intermediate position of the transmitting coil 14.

In fig. 2, the transmitting coil 14 includes 2 pairs of joints, i.e., a pair of joints (hereinafter referred to as a second pair of joints) formed by the joint 1 and the joint 2 and a pair of joints (hereinafter referred to as a first pair of joints) formed by the joint 2 and the joint 3. Taking the example that the transmitting coil 14 comprises N turns (N is a positive integer greater than 1), since the junctions 1 and 2 are located at the innermost and outermost sides of the transmitting coil 14, respectively, the junctions 1 and 2 define N turns (i.e., all of the coils of the transmitting coil 14), and since the junction 3 is located at the intermediate position of the transmitting coil 14, the junctions 2 and 3 define a coil having a number of turns less than N.

The control circuit 16 may be configured to select a pair of contacts from a plurality of pairs of contacts that are electrically connected to the wireless transmit circuit 12. The wireless transmitting circuit 12 is electrically connected to which of the plurality of pairs of contacts, and the wireless transmitting circuit 12 transmits a wireless charging signal outwardly through a coil defined by the pair of contacts to which it is electrically connected. Still taking fig. 2 as an example, if the wireless transmit circuit 12 is electrically connected to a second pair of terminals (including terminal 1 and terminal 2), the wireless transmit circuit 12 transmits a wireless charging signal outwardly through the entire transmit coil 14 (including an N-turn coil); if the wireless transmitting circuit 12 is electrically connected to the first pair of contacts (including the contacts 2 and 3), the wireless transmitting circuit 12 transmits a wireless charging signal outwardly through a coil (less than N turns) located between the contacts 2 and 3.

The form of the control circuit 16 is not particularly limited in the embodiment of the present application, as long as the above-described control function can be realized. As one example, the control circuit 16 may include a microcontroller unit (microcontroller unit, MCU) and a switching circuit that switches between different pairs of contacts under the control of the MCU.

The control circuit 16 may select a pair of contacts from a plurality of pairs of contacts to be electrically connected to the wireless transmitting circuit 12 in any manner, which is not limited in the embodiment of the present application. For example, the control circuit 16 may operate using a pair of joints defining a greater number of turns, and if the heat generated by the wireless transmitting device 10 is excessive, the control circuit 16 may operate using a pair of joints defining a lesser number of turns to reduce the amount of heat generated during operation.

The transmitting coil 14 provided in the embodiment of the application is provided with a plurality of pairs of connectors, and the control circuit 16 can select and switch between the plurality of pairs of connectors according to actual needs, so that the flexibility of a wireless charging process is improved.

An alternative way of selecting the joint is given below.

First, the wireless charging device 10 supports a first wireless charging mode and a second wireless charging mode. The wireless charging apparatus 10 charges the device to be charged in the first wireless charging mode faster than the wireless charging apparatus charges the device to be charged in the second wireless charging mode.

In other words, the wireless charging apparatus 10 operating in the first wireless charging mode takes less time to fill the battery in the device to be charged 230 with the same capacity than the wireless charging apparatus 10 operating in the second wireless charging mode.

The second wireless charging mode may be referred to as a normal wireless charging mode, and may be, for example, a conventional wireless charging mode based on QI standard, power entity alliance (power matters alliance, PMA) standard, or wireless power alliance (alliance for wireless power, A4 WP) standard. The first wireless charging mode may be a fast wireless charging mode. The normal wireless charging mode may refer to a wireless charging mode in which the wireless charging device 10 has a small transmitting power (typically less than 15W, and a common transmitting power is 5W or 10W), and in the normal wireless charging mode, it is required to completely fill a battery with a large capacity (such as a battery with a capacity of 3000 milliampere hours), which usually takes several hours; while in the fast wireless charging mode, the transmit power of the wireless charging device 10 is relatively large (typically greater than or equal to 15W). Compared to the normal wireless charging mode, the charging time required for the wireless charging device 220 to completely fill the same capacity battery in the fast wireless charging mode can be significantly shortened and the charging speed is faster.

The control circuit 16 may be configured to: when the wireless charging device 10 charges the equipment to be charged using the first wireless charging mode, a first pair of connectors of the plurality of pairs of connectors is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit 12 transmits a wireless charging signal through a coil defined by the first pair of connectors; when the wireless charging device 10 uses the second wireless charging mode to charge the equipment to be charged, controlling a second pair of connectors of the plurality of pairs of connectors to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit 12 transmits a wireless charging signal through a coil defined by the second pair of connectors; wherein the number of coil turns defined by the first pair of tabs is less than the number of coil turns defined by the second pair of tabs.

Taking the form of the transmitting coil 14 as shown in fig. 2 as an example, the second pair of taps corresponds to tap 1 and tap 2, which define the entire coil of the transmitting coil 14; the first pair of taps corresponds to tap 2 and tap 3, which define part of the coil of the transmit coil 14. When the wireless charging device 10 uses the second wireless charging mode to charge the equipment to be charged, the control circuit 16 can control the wireless transmitting circuit 12 to be electrically connected with the connector 1 and the connector 2, so that the transmitting coil 14 is in an operating state as a whole; when the wireless charging apparatus 10 uses the first wireless charging mode to charge the device to be charged, the control circuit 16 may control the wireless transmitting circuit 12 to be electrically connected with the connector 2 and the connector 3, so that a part of the coils in the transmitting coil 14 are in an operating state.

The more coil turns a pair of junctions define, the greater the impedance of the coil may be. When the wireless charging device 10 is operated in the first wireless charging mode, since the charging speed of the wireless charging device 10 in the first wireless charging mode is high, if the impedance of the coil in the operating state is high, the heat generation phenomenon of the coil is very prominent. In order to reduce the heat productivity of the coil, when the wireless charging device 10 is in the first wireless charging mode, the embodiment of the present application controls the first docking head to operate, so as to reduce the impedance and the heat productivity of the coil in an operating state (the reduction of the inductance caused by the smaller number of turns of the coil can be compensated by increasing the emission voltage, etc.); when the wireless charging device 10 is in the second wireless charging mode, the embodiment of the present application controls the second docking head to operate.

The wireless charging device 10 may further include a circuit having other functions according to actual needs, in addition to the wireless transmitting circuit 12, the transmitting coil 14, and the control circuit 16, which is not limited in this embodiment. Several alternative implementations of the wireless charging device 10 are presented below in conjunction with fig. 3-4.

As shown in fig. 3, the wireless charging device 10 may also include a voltage conversion circuit 18.

The voltage conversion circuit 18 is operable to receive an input voltage and convert the input voltage to an input voltage and an input current of the wireless transmitting circuit 12. The control circuit 16 may also be used to wirelessly communicate with the device to be charged during wireless charging to adjust the transmit power of the wireless transmit circuit 12 so that the transmit power of the wireless transmit circuit 12 matches the charging voltage and/or charging current currently required by the battery of the device to be charged.

The voltage conversion circuit 18 is configured to enable the wireless charging device 10 to adjust the voltage received by the wireless transmitting circuit 12 according to actual needs. For example, if the maximum output voltage of the external power supply device cannot meet the input voltage requirement of the wireless transmitting circuit 12, the voltage conversion circuit 18 may be configured such that the input voltage of the wireless transmitting circuit 12 cannot reach the desired input voltage, assuming that the wireless charging device 10 desires to perform energy transmission in a high-voltage low-current manner, which requires a high input voltage (e.g., 10V or 20V) of the wireless transmitting circuit 12. Of course, alternatively, if the output voltage of the external power supply device can meet the input voltage requirement of the wireless transmitting circuit 12, the voltage converting circuit 18 can be omitted to simplify the implementation of the wireless charging apparatus 10.

As shown in fig. 4, the wireless charging device 10 may also include a charging interface 13. The charging interface 13 may be used to connect to an external power supply device 20, and the input voltage of the voltage conversion circuit 18 described above may be the voltage supplied by the power supply device 20 through the charging interface 13. In this embodiment, the control circuit 16 is also operable to communicate with the power supply device 20 to adjust the output voltage and/or output current of the power supply device 20 to adjust the transmit power of the wireless transmit circuit 12.

Alternatively, the charging interface 13 may be a universal serial bus (universal serial bus, USB) interface. The type of the charging interface 13 is not particularly limited in this application. Alternatively, in some embodiments, the charging interface 13 may be a universal serial bus (universal serial bus, USB) interface. The USB interface may be, for example, a USB 2.0 interface, a micro USB interface, or a USB TYPE-C interface. Alternatively, in other embodiments, the charging interface 13 may also be a lighting interface, or any other type of parallel and/or serial port that can be used for charging.

The communication manner between the control circuit 16 and the power supply apparatus 20 is not particularly limited in the embodiment of the present application. As one example, the control circuit 16 may be connected to the power supply device 20 through a communication interface other than the charging interface, and communicate with the power supply device 20 through the communication interface. As another example, the control circuit 16 may communicate with the power supply device 20 in a wireless manner. For example, the control circuit 16 may perform near field communication (near field communication, NFC) with the power supply 20. As yet another example, the control circuit 16 may communicate with the power supply device 20 through the charging interface 13 without providing an additional communication interface or other wireless communication module, which may simplify the implementation of the wireless charging apparatus 10. For example, the charging interface 13 is a USB interface, and the control circuit 16 may communicate with the power supply device 20 based on data lines (e.g., d+ and/or D-lines) in the USB interface. As another example, charging interface 13 may be a USB interface (e.g., a USB TYPE-C interface) that supports a power transfer (PD) communication protocol, and control circuit 16 and power supply device 210 may communicate based on the PD communication protocol.

The wireless charging apparatus 10 shown in the embodiment of fig. 3 receives charging power through an external power supply device 20. Unlike the embodiment of fig. 3, the embodiment of fig. 4 integrates the functions of the power supply device 20 inside the wireless charging apparatus 10 to reduce the number of devices required for wireless charging and to increase the integration level of the wireless charging apparatus 10.

The wireless charging device according to the embodiment of the present application is described in detail above, and the device to be charged provided in the embodiment of the present application is described in detail below in conjunction with specific embodiments.

The device to be charged provided in embodiments of the present application may be a chip system or a terminal, which may include, but is not limited to, a device configured to receive/transmit communication signals via a wireline connection (e.g., via a public-switched telephone network (public switched telephone network, PSTN), a digital subscriber line (digital subscriber line, DSL), a digital cable, a direct cable connection, and/or another data connection/network) and/or via a wireless interface (e.g., for a cellular network, a wireless local area network (wireless local area network, WLAN), a digital television network such as a digital video broadcasting-handheld (digital video broadcasting handheld, DVB-H) network, a satellite network, an amplitude-frequency modulation (amplitude modulation-frequency modulation, AM-FM) broadcast transmitter, and/or another communication terminal). Terminals configured to communicate over a wireless interface may be referred to as "wireless communication terminals," wireless terminals, "and/or" mobile terminals. Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (personal communication system, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; personal digital assistants (personal digital assistant, PDA) that may include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (global positioning system, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In addition, the device or terminal to be charged used in the embodiment of the present invention may further include a mobile power source (power bank), which can receive the charge of the wireless charging device, so as to store energy to provide energy for other electronic devices.

As shown in fig. 5, the device to be charged 30 provided in the embodiment of the present application may include a receiving coil 32, a wireless receiving circuit 34, and a control circuit 36.

The receiving coil 32 may be used to receive a wireless charging signal transmitted by a wireless charging device. The receiving coil 32 has a plurality of pairs of taps, and the number of turns of the coil defined by the different tap pairs is different. The lead is led out at a certain position of the receiving coil 32 to form a joint. The specific location of the connector in the receiver coil 32 may be flexibly set according to actual needs, such as may be located in one or more of the following positions of the receiver coil 32: a start position, an end position, and any position in between. Each pair of taps in the receive coil 32 may define a coil having a number of turns. The coil defined by a pair of joints is a coil in which one joint of the pair of joints is used as a starting position and the other joint is used as an ending position.

The number of pairs of connectors included in the receiving coil 32 in the embodiments of the present application is not particularly limited, and may include 2 pairs of connectors, or may include 3 pairs or more of interfaces, for example.

The receiving coil 32 may be of the design shown in fig. 2. As shown in fig. 2, the receiving coil 32 includes 3 terminals, namely, terminal 1, terminal 2, and terminal 3 shown in fig. 2. The connector 2 is located at the start position (or innermost side) of the receiving coil 32, the connector 1 is located at the end position (or outermost side) of the receiving coil 32, and the connector 3 is located at the intermediate position of the receiving coil 32.

In fig. 2, the receiving coil 32 includes 2 pairs of joints, i.e., a pair of joints (hereinafter referred to as a second pair of joints) formed by the joint 1 and the joint 2 and a pair of joints (hereinafter referred to as a first pair of joints) formed by the joint 2 and the joint 3. Taking the example that the receiving coil 32 comprises N turns (N is a positive integer greater than 1), since the junctions 1 and 2 are located at the innermost and outermost sides of the receiving coil 32, respectively, the junctions 1 and 2 define N turns (i.e., all of the coils of the receiving coil 32), and since the junction 3 is located at the intermediate position of the receiving coil 32, the junctions 2 and 3 define a coil having a number of turns less than N.

The wireless receiving circuit 34 may be configured to convert the wireless charging signal received by the receiving coil 32 into an output voltage and an output current of the wireless receiving circuit 34. Specifically, the wireless receiving circuit 34 may include a rectifying circuit and/or a shaping circuit such as a filtering circuit.

The control circuit 36 may be configured to select a pair of contacts from a plurality of pairs of contacts that are electrically connected to the wireless receiving circuit 34. The wireless receiving circuit 34 is electrically connected to which of the plurality of pairs of contacts, and the wireless receiving circuit 34 receives a wireless charging signal from the coil defined by the pair of contacts to which it is electrically connected. Still taking fig. 2 as an example, if the wireless receiving circuit 34 is electrically connected to the second pair of terminals (including terminal 1 and terminal 2), the wireless receiving circuit 34 receives a wireless charging signal through the entire receiving coil 32 (including N turns of coil); if the wireless receiving circuit 34 is electrically connected to the first pair of contacts (including the contacts 2 and 3), the wireless receiving circuit 34 receives a wireless charging signal through a coil (less than N turns) located between the contacts 2 and 3.

The form of the control circuit 36 in the embodiment of the present application is not particularly limited as long as the above-described control function can be realized. As one example, the control circuit 36 may include an MCU and a switching circuit that switches between different pairs of contacts under the control of the MCU.

The control circuit 36 may select a pair of connectors from a plurality of pairs of connectors to be electrically connected to the wireless receiving circuit 34 in any manner, which is not limited in the embodiment of the present application. For example, the control circuit 36 may first operate using a pair of joints defining a larger number of turns, and if the heat generated by the device to be charged 30 is too large, the control circuit 36 may operate using a pair of joints defining a smaller number of turns to reduce the amount of heat generated during operation.

The receiving coil 32 provided in the embodiment of the application has a plurality of pairs of connectors, and the control circuit 36 can select and switch between the plurality of pairs of connectors according to actual needs, so that flexibility of a wireless charging process is improved.

An alternative way of selecting the joint is given below.

First, as shown in fig. 6, the device to be charged 30 may further include: a first charging path 31 and a detection circuit 33. The voltage-reducing circuit 312 may be disposed on the first charging channel 31 (the voltage-reducing circuit 312 may be a Buck circuit or a charge pump, or the voltage-reducing circuit may not be disposed on the first charging channel 31), and the voltage-reducing circuit 312 may be configured to receive the output voltage of the wireless receiving circuit 34, perform voltage-reducing processing on the output voltage of the wireless receiving circuit 34, obtain the output voltage and the output current of the first charging channel 31, and charge the battery 35 of the device to be charged 30 based on the output voltage and the output current of the first charging channel 31.

The detection circuit 33 may be used to detect the voltage and/or current on the first charging channel 31.

The control circuit 36 may be configured to wirelessly communicate with the wireless charging device according to the voltage and/or current on the first charging channel 31 detected by the detection circuit 33, so as to adjust the transmitting power of the wireless charging device, so that the output voltage and/or output current of the first charging channel 31 matches the charging voltage and/or charging current currently required by the battery 35.

Optionally, as shown in fig. 6, the device to be charged 30 may further include a second charging channel 37. The second charging channel 37 may be provided with a conversion circuit 372, where the conversion circuit 372 may be configured to receive an output voltage and an output current of the wireless receiving circuit 34, perform constant voltage and/or constant current control on the output voltage and/or the output current of the wireless receiving circuit 34, so that the output voltage and/or the output current of the second charging channel 37 matches a charging voltage and/or a charging current currently required by the battery 35, and charge the battery 35 (may include a power core or multiple power cores connected in series) based on the output voltage and/or the output current of the second charging channel 37.

The control circuit 36 may be configured to: when the device to be charged 30 charges the battery 35 using the first charging path 31, a first pair of contacts of the plurality of pairs of contacts is controlled to be electrically connected with the wireless receiving circuit 34, so that the wireless receiving circuit 34 receives a wireless charging signal through a coil defined by the first pair of contacts; when the device to be charged 30 charges the battery 35 using the second charging path 37, a second pair of contacts of the plurality of pairs of contacts is controlled to be electrically connected with the wireless receiving circuit 34, so that the wireless receiving circuit 34 receives a wireless charging signal through a coil defined by the second pair of contacts; wherein the number of coil turns defined by the first pair of tabs is less than the number of coil turns defined by the second pair of tabs.

Taking the form of the receiving coil 32 as shown in fig. 2 as an example, the second pair of junctions corresponds to junction 1 and junction 2, which define all of the coils of the receiving coil 32; the first pair of contacts corresponds to contacts 2 and 3, which define part of the coils of the receiving coil 32. When the to-be-charged device 30 charges the battery 35 using the second charging channel 37, the control circuit 36 may control the wireless receiving circuit 34 to be electrically connected with the connector 1 and the connector 2, so that the receiving coil 32 is in an operating state as a whole; when the device to be charged 30 charges the battery 35 using the first charging path 37, the control circuit 36 may control the wireless receiving circuit 34 to be electrically connected with the connector 2 and the connector 3 so that a part of the coils in the receiving coil 32 are in an operating state.

The first charging path 31 and the second charging path 37 described above may correspond to the wireless charging mode of the wireless charging device described above. For example, when the wireless charging device performs wireless charging in the first wireless charging mode, the to-be-charged apparatus 30 may charge the battery 35 using the first charging path 31; when the wireless charging device performs wireless charging in the second wireless charging mode, the device to be charged 30 may charge the battery 35 using the second charging path 37.

In the embodiment of the application, the control circuit 36 switches between different connector pairs according to the charging channel currently used, so that the flexibility of wireless charging is improved.

The control circuit 36 and the wireless charging device may perform wireless communication based on bluetooth (blue), wi-Fi (wireless fidelity), or backscatter (backscattering) modulation (or power load modulation), which is not limited by the embodiments of the present application.

The apparatus embodiments of the present application are described above in detail in connection with fig. 1-6, and the method embodiments of the present application are described below in connection with fig. 7-8, where the method embodiments correspond to the apparatus embodiments, and therefore, reference may be made to the apparatus embodiments above for parts that are not described in detail.

Fig. 7 is a schematic flowchart of a control method of a wireless charging device provided in an embodiment of the present application. The wireless charging device may be the wireless charging device 10 described above. The wireless charging device may include: wireless transmitting circuit and transmitting coil. The transmitting coil has a plurality of pairs of taps, and the number of turns of the coil defined by the different tap pairs is different.

The control method of fig. 7 includes step S710. In step S710, a pair of contacts electrically connected to the wireless transmission circuit is selected from the plurality of pairs of contacts.

Optionally, the wireless charging device supports a first wireless charging mode and a second wireless charging mode, wherein the charging speed of the device to be charged in the first wireless charging mode is faster than the charging speed of the device to be charged in the second wireless charging mode.

In this embodiment, the step S710 may include controlling a first pair of connectors of the plurality of pairs of connectors to be electrically connected with the wireless transmitting circuit so that the wireless transmitting circuit transmits the wireless charging signal through the coil defined by the first pair of connectors when the wireless charging device charges the device to be charged using the first wireless charging mode; when the wireless charging device uses a second wireless charging mode to charge the equipment to be charged, a second pair of connectors in the plurality of pairs of connectors is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit transmits wireless charging signals through coils defined by the second pair of connectors; wherein the number of coil turns defined by the first pair of tabs is less than the number of coil turns defined by the second pair of tabs.

Fig. 8 is a schematic flowchart of a control method of a device to be charged provided in an embodiment of the present application. The device to be charged may be the device to be charged 30 described above. The device to be charged 30 may include a reception line diagram and a wireless reception circuit. The receiving coil has a plurality of pairs of taps, and the number of turns of the coil defined by the different tap pairs is different.

The control method of fig. 8 includes step S810. In step S810, a pair of contacts electrically connected to the wireless receiving circuit is selected from the plurality of pairs of contacts.

Optionally, the device to be charged may further include. A first charging path. The first charging channel is provided with a voltage reduction circuit, the voltage reduction circuit is used for receiving the output voltage of the wireless receiving circuit, carrying out voltage reduction treatment on the output voltage of the wireless receiving circuit to obtain the output voltage and the output current of the first charging channel, and charging the battery of the equipment to be charged based on the output voltage and the output current of the first charging channel;

the control method of fig. 8 may further include: detecting a voltage and/or current on the first charging path; and according to the detected voltage and/or current on the first charging channel, carrying out wireless communication with the wireless charging device so as to adjust the transmitting power of the wireless charging device, so that the output voltage and/or output current of the first charging channel is matched with the charging voltage and/or charging current currently required by the battery.

Optionally, the device to be charged may further comprise a second charging channel. The second charging channel is provided with a conversion circuit, the conversion circuit is used for receiving the output voltage and the output current of the wireless receiving circuit, and performing constant voltage and/or constant current control on the output voltage and/or the output current of the wireless receiving circuit, so that the output voltage and/or the output current of the second charging channel is matched with the current required charging voltage and/or the current of the battery, and the battery is charged based on the output voltage and/or the output current of the second charging channel.

The step S810 may include: when the to-be-charged equipment charges the battery by using the first charging channel, a first pair of connectors in the plurality of pairs of connectors is controlled to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives a wireless charging signal through a coil defined by the first pair of connectors; when the to-be-charged equipment charges the battery by using the second charging channel, controlling a second pair of connectors in the plurality of pairs of connectors to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives wireless charging signals through a coil defined by the second pair of connectors; wherein the number of coil turns defined by the first pair of tabs is less than the number of coil turns defined by the second pair of tabs.

Optionally, the step-down circuit is a Buck circuit or a charge pump.

Optionally, the device to be charged and the wireless charging device communicate wirelessly based on bluetooth, wireless fidelity, or backscatter modulation.

It should be noted that, on the premise of no conflict, the embodiments described in the present application and/or the technical features in the embodiments may be arbitrarily combined with each other, and the technical solutions obtained after the combination should also fall into the protection scope of the present application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, 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, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (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 accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of 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 video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The foregoing is merely 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 think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to 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 (18)

1. A wireless charging device, wherein the wireless charging device supports a first wireless charging mode and a second wireless charging mode, wherein the wireless charging device charges a device to be charged in the first wireless charging mode at a faster rate than the wireless charging device charges the device to be charged in the second wireless charging mode, the wireless charging device comprising:

A wireless transmitting circuit;

a transmitting coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different;

a control circuit for selecting a pair of connectors from a plurality of pairs of connectors to be electrically connected to the wireless transmitting circuit,

when the wireless charging device uses the first wireless charging mode to charge a first charging channel comprising a voltage reducing circuit in the equipment to be charged, a first pair of connectors in a plurality of pairs is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit transmits wireless charging signals through a coil defined by the first pair of connectors and performs voltage reducing processing through the voltage reducing circuit;

when the wireless charging device uses the second wireless charging mode to charge a second charging channel comprising a conversion circuit in the equipment to be charged, a second pair of connectors in a plurality of pairs is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit transmits wireless charging signals through a coil defined by the second pair of connectors and performs constant voltage and/or constant current control through the conversion circuit, the output voltage and/or output current of the second charging channel is matched with the charging voltage and/or charging current currently required by a battery, and the battery is charged based on the output voltage and/or the output current of the second charging channel;

Wherein the first pair of tabs define a fewer number of turns than the second pair of tabs.

2. The wireless charging device of claim 1, wherein the wireless charging device further comprises:

the voltage conversion circuit is used for receiving input voltage and converting the input voltage to obtain the input voltage and the input current of the wireless transmitting circuit;

the control circuit is further used for carrying out wireless communication with the equipment to be charged in the wireless charging process so as to adjust the transmitting power of the wireless transmitting circuit, so that the transmitting power of the wireless transmitting circuit is matched with the charging voltage and/or the charging current currently required by the battery of the equipment to be charged.

3. The wireless charging device of claim 2, wherein the wireless charging device further comprises:

the charging interface is used for being connected with the power supply equipment, and the input voltage of the voltage conversion circuit is the voltage provided by the power supply equipment through the charging interface;

wherein the control circuit is further configured to communicate with the power supply device to adjust an output voltage and/or an output current of the power supply device to adjust a transmit power of the wireless transmit circuit.

4. The wireless charging device of claim 3, wherein the charging interface is a universal serial bus USB interface or a lighting interface.

5. The wireless charging apparatus of claim 4, wherein the charging interface is a USB interface, and the control circuit communicates with the power supply device based on a data line in the USB interface.

6. The wireless charging apparatus of claim 4, wherein the charging interface is a USB interface supporting a power transfer PD communication protocol, and the control circuit communicates with the power supply device based on the PD communication protocol.

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

and the power supply circuit is used for receiving externally input alternating current, generating output voltage and output current of the power supply circuit according to the alternating current, and the input voltage of the voltage conversion circuit is the output voltage of the power supply circuit.

8. The wireless charging device of any one of claims 1-7, wherein the wireless charging device is a wireless charging base.

9. A device to be charged, characterized by comprising:

a receiving coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different;

a wireless receiving circuit;

the wireless charging device comprises a first charging channel, wherein a voltage reducing circuit is arranged on the first charging channel and is used for receiving the output voltage of the wireless receiving circuit, reducing the output voltage of the wireless receiving circuit to obtain the output voltage and the output current of the first charging channel, and charging the battery of the device to be charged based on the output voltage and the output current of the first charging channel;

the second charging channel is provided with a conversion circuit, the conversion circuit is used for receiving the output voltage and the output current of the wireless receiving circuit, performing constant voltage and/or constant current control on the output voltage and/or the output current of the wireless receiving circuit, enabling the output voltage and/or the output current of the second charging channel to be matched with the charging voltage and/or the charging current currently required by the battery, and charging the battery based on the output voltage and/or the output current of the second charging channel;

The control circuit is used for selecting a pair of connectors electrically connected with the wireless receiving circuit from a plurality of pairs of connectors, and specifically comprises:

when the to-be-charged device charges the battery by using the first charging channel, a first pair of connectors in a plurality of pairs of connectors is controlled to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives a wireless charging signal through a coil defined by the first pair of connectors;

when the to-be-charged equipment charges the battery by using the second charging channel, a second pair of connectors in a plurality of pairs of connectors is controlled to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives a wireless charging signal through a coil defined by the second pair of connectors;

wherein the first pair of tabs define a fewer number of turns than the second pair of tabs.

10. The apparatus to be charged according to claim 9, characterized in that said apparatus to be charged further comprises:

a detection circuit for detecting a voltage and/or a current on the first charging channel;

the control circuit is further configured to:

and according to the voltage and/or current on the first charging channel detected by the detection circuit, carrying out wireless communication with a wireless charging device so as to adjust the transmitting power of the wireless charging device, so that the output voltage and/or output current of the first charging channel is matched with the charging voltage and/or charging current currently required by the battery.

11. The device to be charged according to claim 10, wherein said battery comprises N power cells connected in series with each other, wherein N is a positive integer greater than 1.

12. The device to be charged according to any one of claims 10-11, characterized in that the step-down circuit is a Buck circuit or a charge pump.

13. The device to be charged according to any of the claims 10-11, characterized in that said control circuit and said wireless charging means are in wireless communication based on bluetooth, wireless fidelity or backscatter modulation.

14. A control method of a wireless charging device, wherein the wireless charging device supports a first wireless charging mode and a second wireless charging mode, and a charging speed of a device to be charged in the first wireless charging mode is faster than a charging speed of the wireless charging device to the device to be charged in the second wireless charging mode, the wireless charging device comprising:

a wireless transmitting circuit;

a transmitting coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different;

a control circuit;

the control method comprises the following steps:

selecting a pair of connectors from a plurality of pairs of connectors, wherein the pair of connectors are electrically connected with the wireless transmitting circuit;

The control circuit performs the following steps: when the wireless charging device uses the first wireless charging mode to charge a first charging channel comprising a voltage reducing circuit in the equipment to be charged, a first pair of connectors in a plurality of pairs is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit transmits wireless charging signals through a coil defined by the first pair of connectors and performs voltage reducing processing through the voltage reducing circuit;

when the wireless charging device uses the second wireless charging mode to charge a second charging channel comprising a conversion circuit in the equipment to be charged, a second pair of connectors in a plurality of pairs is controlled to be electrically connected with the wireless transmitting circuit, so that the wireless transmitting circuit transmits wireless charging signals through a coil defined by the second pair of connectors and performs constant voltage and/or constant current control through the conversion circuit, the output voltage and/or output current of the second charging channel is matched with the charging voltage and/or charging current currently required by a battery, and the battery is charged based on the output voltage and/or the output current of the second charging channel;

wherein the first pair of tabs define a fewer number of turns than the second pair of tabs.

15. A control method of an apparatus to be charged, characterized in that the apparatus to be charged includes:

a receiving coil having a plurality of pairs of junctions, and the number of turns of the coil defined by the different junction pairs being different;

a wireless receiving circuit;

the wireless charging device comprises a first charging channel, wherein a voltage reducing circuit is arranged on the first charging channel and is used for receiving the output voltage of the wireless receiving circuit, reducing the output voltage of the wireless receiving circuit to obtain the output voltage and the output current of the first charging channel, and charging the battery of the device to be charged based on the output voltage and the output current of the first charging channel;

the second charging channel is provided with a conversion circuit, the conversion circuit is used for receiving the output voltage and the output current of the wireless receiving circuit, performing constant voltage and/or constant current control on the output voltage and/or the output current of the wireless receiving circuit, enabling the output voltage and/or the output current of the second charging channel to be matched with the charging voltage and/or the charging current currently required by the battery, and charging the battery based on the output voltage and/or the output current of the second charging channel;

A control circuit;

the control method comprises the following steps:

selecting a pair of connectors from a plurality of pairs of connectors, wherein the pair of connectors are electrically connected with the wireless receiving circuit;

executing by the control circuit: when the to-be-charged device charges the battery by using the first charging channel, a first pair of connectors in a plurality of pairs of connectors is controlled to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives a wireless charging signal through a coil defined by the first pair of connectors;

when the to-be-charged equipment charges the battery by using the second charging channel, a second pair of connectors in a plurality of pairs of connectors is controlled to be electrically connected with the wireless receiving circuit, so that the wireless receiving circuit receives a wireless charging signal through a coil defined by the second pair of connectors;

wherein the first pair of tabs define a fewer number of turns than the second pair of tabs.

16. The control method according to claim 15, characterized in that the device to be charged further comprises:

detecting a voltage and/or current on the first charging channel;

according to the detected voltage and/or current on the first charging channel, wireless communication is carried out with a wireless charging device, so that the transmitting power of the wireless charging device is adjusted, and the output voltage and/or output current of the first charging channel is matched with the charging voltage and/or charging current currently required by the battery.

17. The control method according to claim 15 or 16, characterized in that the step-down circuit is a Buck circuit or a charge pump.

18. The control method according to any one of claims 15 to 16, characterized in that the device to be charged and the wireless charging means communicate wirelessly based on bluetooth, wireless fidelity or backscatter modulation.