CN112769246A - Wireless charging and discharging method, wireless charging and discharging device and electronic equipment - Google Patents
Wireless charging and discharging method, wireless charging and discharging device and electronic equipment Download PDFInfo
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- 238000007599 discharging Methods 0.000 title claims abstract description 141
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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Abstract
The embodiment of the application provides a wireless charging and discharging method, a wireless charging and discharging device and electronic equipment. The wireless charging and discharging method comprises the following steps: sending a preset electromagnetic signal to second equipment; the preset electromagnetic signal is used for indicating the second equipment to generate response information; acquiring the equipment type of the second equipment according to the response information; when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device; when the second equipment is wireless transmitting equipment, the preset electromagnetic signal is stopped being sent, the charging safety can be improved, and the equipment is prevented from being damaged.
Description
Technical Field
The present disclosure relates to the field of charging and discharging technologies, and in particular, to a wireless charging and discharging method, a wireless charging and discharging device, and an electronic device.
Background
Electronic devices play an increasingly important role in human life, and the development of charging technology for electronic devices is becoming faster and faster. In the wireless charging system, the first device can be used as a transmitting terminal for wireless charging, the second device can be used as a receiving terminal for wireless charging, in the wireless charging process, the first device can transmit the energy stored in the battery of the first device through the coil, and the second device can receive the energy through the receiving coil to realize wireless charging.
However, in the wireless charging process, if the first device can be used as a transmitting terminal for wireless charging or a receiving terminal for wireless charging, and the second device is a wireless transmitting device (e.g., a wireless charging base), when the first device starts wireless reverse charging, that is, when the first device is used as the transmitting terminal for wireless charging, the first device and the second device both continuously transmit electromagnetic signals, and resonance energy of the two electromagnetic signals is superposed, thereby causing different damage to the first device or the second device.
Disclosure of Invention
The embodiment of the application provides a wireless charging and discharging method, a wireless charging and discharging device and an electronic device, which can improve safety and avoid damage of the device.
The embodiment of the application provides a wireless charging and discharging method, which is applied to first equipment, wherein the first equipment comprises a receiving and transmitting coil, the receiving and transmitting coil is used for transmitting a preset electromagnetic signal and a receiving and transmitting electromagnetic signal, and the method comprises the following steps:
sending a preset electromagnetic signal to second equipment; the preset electromagnetic signal is used for indicating the second equipment to generate response information;
acquiring the equipment type of the second equipment according to the response information;
when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device;
and when the second equipment is wireless transmitting equipment, stopping transmitting the preset electromagnetic signal.
The embodiment of the application provides a wireless charging and discharging method, which is applied to second equipment, and comprises the following steps:
receiving a preset electromagnetic signal transmitted by first equipment;
responding to the preset electromagnetic signal according to the equipment type to generate corresponding response information;
and feeding back the response information to the first equipment according to a preset communication protocol, and receiving the adjusted preset electromagnetic signal sent by the first equipment to charge the second equipment when the second equipment is wireless receiving equipment.
The embodiment of the application provides a wireless charging and discharging device, includes:
the wireless receiving and transmitting circuit is used for generating magnetic induction with external wireless equipment, and is used for transmitting a preset electromagnetic signal and receiving and transmitting the electromagnetic signal, wherein the preset electromagnetic signal is used for indicating the external wireless equipment to generate response information;
the control module is connected with the wireless transceiving circuit and used for acquiring the equipment type of the external wireless equipment according to the response information;
the charging and discharging circuit is respectively connected with the wireless transceiving circuit and the control module, and is used for adjusting the preset electromagnetic signal and discharging to the external wireless equipment when the external wireless equipment is wireless receiving equipment; and when the external wireless equipment is wireless transmitting equipment, controlling the wireless receiving and transmitting circuit to stop transmitting the preset electromagnetic signal.
An electronic device in an embodiment of the present application includes the above wireless charging and discharging device.
The wireless charging and discharging method, the wireless charging and discharging device and the electronic equipment can send the preset electromagnetic signal to the second equipment; acquiring the equipment type of the second equipment according to the response information; when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device; and when the second equipment is wireless transmitting equipment, stopping transmitting the preset electromagnetic signal and waiting for receiving the electromagnetic signal transmitted by the second equipment. When the first equipment is used as a wireless charging transmitting terminal, the first equipment can transmit preset electromagnetic signals to the second equipment, the equipment type of the second equipment is identified, and the second equipment is discharged when being used as wireless receiving equipment, so that the safety is improved, and the first equipment is prevented from being damaged.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1a is a diagram illustrating an application scenario of a wireless charging method according to an embodiment;
fig. 1b is a diagram illustrating an application scenario of a wireless charging method according to another embodiment;
FIG. 2 is a flow chart of a wireless charging and discharging method according to an embodiment;
FIG. 3 is a flow chart of a wireless charging and discharging method according to an embodiment;
FIG. 4 is a flow chart of a wireless charging and discharging method according to another embodiment;
FIG. 5 is a flowchart of a wireless charging/discharging method according to still another embodiment;
FIG. 6 is a flowchart of a wireless charging/discharging method according to still another embodiment;
fig. 7 is a schematic structural diagram of a wireless charging and discharging device in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Fig. 1a and 1b are schematic diagrams of an application environment of a wireless charging and discharging method in an embodiment. As shown in fig. 1a and 1b, the application environment may be understood as a wireless charging system comprising a first device 110 and a second device 120. In this embodiment, the first device 110 may serve as a transmitting terminal for wireless charging, and may be capable of discharging to the second device based on a wireless charging technology; the first device 110 can be a receiving end, which can obtain power from the second device (wireless charging cradle) based on the wireless charging technology to charge the first device.
In the embodiment of the present application, the first device 110 may be any terminal device that can receive the charge of an external device in a wireless manner and can discharge to other electronic devices in a wireless manner, such as a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), an in-vehicle computer, a wearable device, or a wireless mobile power supply (charger) having both wireless charging and discharging functions.
When the second device 120 is a wireless charging receiving terminal, the first device 110 can turn on the reverse wireless charging function, the first device 110 can be used as a wireless charging transmitting terminal, the energy stored in the battery can be transmitted in the form of electromagnetic waves through the wireless transceiver circuit, and the second device 120 can receive the electromagnetic waves through the wireless transceiver circuit, so that the charging of the second device is realized.
When the second device 120 is a wireless charging transmitting terminal (e.g., a wireless charging base device), the first device 110 may serve as a wireless charging receiving terminal, and may receive the electric energy transmitted by the second device in a wireless manner, so as to implement wireless charging.
The wireless charging and discharging method in this embodiment is described by taking the first device in fig. 1 as an example. In the embodiment of the present application, the first device may serve as both a transmitting end and a receiving end of wireless charging.
Fig. 2 is a flow chart of a wireless charging method in one embodiment. In one embodiment the wireless charging method comprises steps 202 to 206.
In one embodiment, the wireless transceiver circuit in the first device includes a transceiver coil for transmitting the predetermined electromagnetic signal and transceiving the electromagnetic signal.
The first device sends a preset electromagnetic signal to the second device through the transceiver coil, wherein the preset electromagnetic signal can be understood as a periodic resonant wave with preset power. For example, the first device transmits periodic resonant waves with preset power through the transceiver coil, and the frequency of the periodic resonant waves can enable the transceiver coil to work at a deviated LC resonance point and meet the minimum working frequency required by wireless communication between the first device and the second device, so that the resonant waves for communication can be reduced, and the damage risk of the first device can be reduced.
In one embodiment, the device types of the second device may include a wireless receiving device and a wireless transmitting device. When the second device is a wireless receiving device, the second device may serve as a receiving end for wireless charging, and when the second device is a wireless transmitting device, the second device may serve as a transmitting end for wireless charging. Also included in the second device is wireless transceiver circuitry, which may also include a coil for receiving and transmitting electromagnetic signals. When the second device receives the preset electromagnetic signal, the second device is activated to be in a working state, and the second device generates response information according to the received preset electromagnetic signal.
In one embodiment, the second device may generate the corresponding response information according to the device type. When the device types are different, the response information generated by the second device is also different.
And 204, acquiring the device type of the second device according to the response information.
In one embodiment, the first device includes a wireless transceiver circuit, the second device also includes a wireless transceiver circuit, and the first device and the second device can wirelessly communicate based on the respective wireless transceiver circuits. For example, when the first device and the second device are wirelessly communicating based on the Qi protocol, the second device may transmit the generated response information back to the first device by means of a power carrier when the second device is a wireless receiving device. When the second device is a wireless transmitting device, the second device cannot recognize the preset electromagnetic signal, namely, an error is reported, the corresponding response information which can be generated can carry an error reporting identification, and the response cannot be transmitted back to the wireless charging device. Correspondingly, when the first device receives the response message, the second device is indicated as a wireless receiving device; when the first device does not receive the response information, the second device is indicated as a wireless transmitting device.
In one embodiment, the first device may include a wireless communication module, and the second device may also include a wireless communication module. The wireless communication modules in the first device and the second device may receive the response information fed back by the second device according to a preset wireless communication protocol, where the response information carries the device type. When the first device receives the response information, the response information carries the device type of the second device, and the first device can determine the device type of the second device. For example, the first device and the second device may communicate wirelessly via bluetooth (bluetooth), wireless fidelity (Wi-Fi), Near Field Communication (NFC) backscattering (backscatter) modulation (or power load modulation), or other Near Field Communication protocols.
And step 206, when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device.
And step 208, when the second device is a wireless transmitting device, stopping transmitting the preset electromagnetic signal.
In one embodiment, the first device may know the device type of the second device according to the response information. When the second device is a wireless receiving device, the first device may adjust the power of the preset electromagnetic signal transmitted by the wireless transceiving circuit to output an electromagnetic signal suitable for discharging to the second device.
In one embodiment, when the second device is a wireless transmitting device, the first device stops sending the preset electromagnetic signal, and at this time, the first device may stop sending the preset electromagnetic signal to the second device, so as to avoid loss of electric quantity in the first device.
In one embodiment, when the second device is a wireless transmitting device, the first device stops sending the preset electromagnetic signal.
In one embodiment, when the second device is a wireless transmitting device, the first device may also wait to receive the electromagnetic signal transmitted by the second device. For example, when the second device is a wireless transmitting device, if the wireless transmitting device turns on a wireless charging function, the wireless transmitting device may transmit an electromagnetic signal to the first device to charge the first device.
For example, the charging process by which the second device charges the first device may include one or more of a trickle charge phase, a constant current charge phase, and a constant voltage charge phase. The constant current charging stage may include a plurality of stages of constant current charging stages, which may be respectively referred to as a first charging stage, a second charging stage, a third charging stage, …, and an nth charging stage. The second device may pre-construct a mapping of the charging phases to their corresponding charging currents. For example, the charging current for the first charging phase is the largest and the charging current for the nth charging phase is the smallest. The nth charging stage may be understood as the last stage of the constant current charging mode, that is, the battery may be fully charged when passing through the nth charging stage. The current conversion process between two adjacent constant current stages can be gradual change, or can also be step-type jump change.
It should be noted that the constant-current charging phase or the constant-current phase mentioned in the embodiments of the present invention does not require that the charging current is kept completely constant, and may refer to that, for example, the peak value or the average value of the charging current is kept constant for a period of time. In practice, the constant current charging stage generally adopts a segmented constant current manner for charging.
The wireless charging method comprises the steps of sending a preset electromagnetic signal to second equipment; the preset electromagnetic signal is used for indicating the second equipment to generate response information; acquiring the equipment type of the second equipment according to the response information; when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device; and when the second equipment is wireless transmitting equipment, stopping transmitting the preset electromagnetic signal and waiting for receiving the electromagnetic signal transmitted by the second equipment. In the method in the embodiment of the present application, when the first device is used as a transmitting end for wireless charging, the first device may transmit a preset electromagnetic signal to the second device, identify a device type of the second device, and discharge the second device when the second device is a wireless receiving device, so that the security is improved, and the first device is prevented from being damaged.
In one embodiment, the wireless charging and discharging method comprises steps 302-312. Wherein the content of the first and second substances,
In one embodiment, a display interface for triggering the discharging instruction is arranged in the first device. The display interface can be any interface, such as a screen locking interface, a pull-down notification interface and the like. For example, a control for turning on the wireless charging function is provided in the display interface. When the operation of the user on the control is received, a corresponding mark is displayed on the control, and the mark is used for indicating that the discharging instruction is triggered and the wireless charging function is started.
Further, when the operation of the user on the control is received, prompt information of whether to start the wireless charging function is output in a pop-up window mode, and a selection control with an option of 'cancel' or 'confirm' is included for the user to select.
In the present application, the specific form of the trigger operation of the discharge command is not further limited.
In one embodiment, the first device further includes a charging and discharging circuit, and when the discharging instruction is triggered, the operating mode of the first device is switchable to a wireless discharging mode, and at this time, the charging and discharging circuit can be used to implement a discharging function, that is, after the electric energy stored in the battery module in the first device is converted, the electric energy can be transmitted by using the wireless transceiving circuit to discharge to the second device.
In one embodiment, the response information may be transmitted by way of a power carrier through the transceiver coil. In the wireless discharging mode, if a transceiver coil in a wireless transceiver circuit receives the response information, it may be determined that the device type of the second device is the wireless receiving device; if the transceiver coil in the transceiver circuit receives the response message within a predetermined period (e.g., three periods), it may be determined that the device type of the second device is the wireless transmitting device.
It should be noted that propagation of the response information, a loading manner, a number of cycles of the preset period, and the like may be negotiated based on a wireless transmission protocol between the first device and the second device, which is not further limited in this embodiment of the application.
And 308, when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device.
In one embodiment, the first device may further receive wireless discharge information sent by the second device, adjust the transmission power of the preset electromagnetic signal according to the received wireless discharge information, and discharge to the second device. Wherein the wireless discharging information includes at least one of a battery level, a discharging power, a charging current, and a charging voltage of the second device. For example, if the wireless discharging information includes the charging power, the first device may adjust the transmission power of the predetermined electromagnetic signal according to the discharging power to transmit the electromagnetic signal suitable for discharging to the second device.
In this embodiment of the application, the first device may adjust the transmission power of the preset electromagnetic signal according to the wireless discharge information, and a specific adjustment manner of the first device is not particularly limited. For example, the charging and discharging circuit included in the first device may include a conversion circuit and a rectifying circuit, wherein the conversion circuit may adjust an output voltage of the rectifying circuit according to the received wireless discharging information. The output voltage of the rectifying circuit is positively correlated with the oscillation frequency of the transmitting and receiving coil. The higher the oscillation frequency of the transceiver coil is, the higher the power of the electromagnetic signal transmitted by the transceiver coil is. When the output voltage is larger, the power transmitted by the transceiver coil is also larger, and the discharging capability of the first device is also stronger.
Optionally, a power adjusting circuit may be further disposed in the first device, and the power adjusting circuit may be connected to the transceiver coil and used for adjusting the power of the transceiver coil for receiving and transmitting the electromagnetic signal. The power adjustment may include, for example, a Pulse Width Modulation (PWM) controller and a switching unit, and the power of the coil for transmitting the electromagnetic signal is adjusted by adjusting a duty ratio of a control signal sent by the PWM controller and/or by controlling a switching frequency of the switching unit.
After the second device receives the adjusted preset electromagnetic signal (also referred to as a target electromagnetic signal), a charging circuit in the second device may convert the target electromagnetic signal into a direct current signal suitable for charging a battery in the second device, so as to wirelessly charge the second device.
In one embodiment, the operating mode of the first device may further include a wireless charging mode. When the working mode is the wireless charging mode, the charging and discharging circuit can be used for realizing the charging function, namely, the electromagnetic signal received by the wireless receiving and transmitting circuit can be converted into the electric signal suitable for charging the battery module in the first device.
In one embodiment, receiving an electromagnetic signal transmitted by the second device and charging the first device according to the received electromagnetic signal includes:
and sending wireless charging information of the first equipment to the second equipment, wherein the wireless charging information is used for indicating the second equipment to transmit an electromagnetic signal suitable for charging the first equipment, and comprises at least one of the battery capacity, the charging demand current and the charging demand voltage of the first equipment. Receiving the electromagnetic signal based on the transceiver coil, and charging the first device in a wireless charging mode of the first device. For example, the charging and discharging circuit may include a conversion circuit and a rectifying circuit. The receiving and transmitting coil can convert the received electromagnetic signals into alternating current signals and output the alternating current signals to the rectifying circuit, the rectifying circuit converts the alternating current signals into direct current signals and outputs the direct current signals to the converting circuit, and the converting circuit performs boosting processing on the received direct current signals to output electric signals suitable for charging the battery module and then charge the first equipment.
In one embodiment, information used for safety protection, abnormality detection, or fault handling, such as temperature information of a battery, indication information of entering overvoltage protection or overcurrent protection, Charge state information (Charge Status), Error correction information (Control Error), and power transfer efficiency information (which may be used to indicate power transfer efficiency between the first device and the second device) may be interacted between the first device and the second device.
The embodiment of the present application further provides a wireless charging and discharging method, which is described by taking the second device in fig. 1 as an example. The second device may be a receiving end for wireless charging, or may be a transmitting end for wireless charging. Fig. 4 is a flow chart of a wireless charging method in one embodiment. In one embodiment the wireless charging method comprises steps 402 to 406.
In one embodiment, the wireless transceiver circuitry in the first device includes a transceiver coil for transmitting and receiving electromagnetic signals. The receiving coil in the second device can generate magnetic induction with the coil of the first device, and can receive a preset electromagnetic signal transmitted by the coil of the first device. The preset electromagnetic signal is a periodic resonant wave with preset power. For example, the first device first transmits periodic resonant waves with preset power through the coil, and the frequency of the periodic resonant waves can enable the coil to work at a deviated LC resonance point and meet the minimum working frequency required by wireless communication between the first device and the second device, so that the resonant wave energy for communication is reduced, and the damage risk of the first device is further reduced.
And step 404, responding to the preset electromagnetic signal according to the equipment type to generate corresponding response information.
And when the second equipment receives the periodic resonant wave, the second equipment is activated to be in a working state, and corresponding response information is generated according to the equipment type of the second equipment.
In one embodiment, the device types of the second device may include a wireless receiving device and a wireless transmitting device. When the second device is a wireless receiving device, the second device may serve as a receiving end for wireless charging, and when the second device is a wireless transmitting device, the second device may serve as a transmitting end for wireless charging. Also included in the second device is wireless transceiver circuitry, which may also include a coil for receiving and transmitting electromagnetic signals. When the second device receives the preset electromagnetic signal, the second device is activated to be in a working state, and the second device generates response information according to the received preset electromagnetic signal.
In one embodiment, the second device may generate the corresponding response information according to the device type. When the device types are different, the response information generated by the second device is also different.
For example, when the second device is a wireless receiving device, the response information generated by the second device is presented by a power carrier. When the second device is a wireless transmitting device, the second device may not recognize the preset electromagnetic signal, or may generate an error, and the response information that may be generated correspondingly may carry an error identifier, for example, the error information has a specific identifier, for example, the response information is null, that is, the response information does not include any data.
In one embodiment, the first device and the second device may communicate wirelessly based on respective wireless transceiving circuitry. For example, when the first device and the second device are wirelessly communicating based on the Qi protocol, the second device may transmit the generated response information back to the first device by means of a power carrier when the second device is a wireless receiving device. When the second device is a wireless transmitting device, the second device cannot recognize the preset electromagnetic signal, or an error occurs, and the response information which can be correspondingly generated carries an error-reporting identifier, for example, the response information is null, that is, does not include any data, and the like, and feeds back the response information to the first device.
In one embodiment, the first device may include a wireless communication module, and the second device may also include a wireless communication module. The wireless communication modules in the first device and the second device may receive the response information fed back by the second device according to a preset wireless communication protocol, where the response information carries the device type. When the first device receives the response information, the response information carries the device type of the second device, and the first device can determine the device type of the second device. For example, the first device and the second device may communicate wirelessly via bluetooth (bluetooth), wireless fidelity (Wi-Fi), Near Field Communication (NFC) backscattering (backscatter) modulation (or power load modulation), or other Near Field Communication protocols.
The specific transmission mode of the response message may be set according to a communication protocol. For example, when the first device and the second device are wirelessly communicated based on the Qi protocol, the response information is transmitted back to the first device by the second device through the power carrier.
The wireless charging method comprises the steps of receiving a preset electromagnetic signal transmitted by first equipment; responding to the preset electromagnetic signal according to the equipment type to generate corresponding response information; and sending the response information to the first equipment, and receiving the adjusted preset electromagnetic signal sent by the first equipment to charge the second equipment when the second equipment is wireless receiving equipment. Before the second equipment is wirelessly charged, the preset electromagnetic signal can be responded according to the equipment type, and the second equipment is charged through the first equipment when the second equipment is the receiving equipment, so that the safety is improved, and the first equipment is prevented from being damaged.
In one embodiment, the preset electromagnetic signal is received by a wireless charging and discharging circuit, and the method further includes:
in an embodiment, the second device is further provided with a detection circuit connected with the wireless charging and discharging circuit, and the detection circuit is used for detecting the output voltage and/or the output current of the wireless charging circuit. The detection circuit may include a voltage detection circuit and a current detection circuit. For example, the voltage detection circuit may sample the output voltage of the wireless charging and discharging circuit by serially dividing the voltage. The current detection circuit can sample the output current of the wireless charging and discharging circuit through the current detection resistor and the current detection meter.
It should be noted that, in the embodiment of the present application, specific circuits for voltage sampling and current sampling in the detection circuit are not further limited.
In an embodiment, the second device may send wireless discharge information to the first device based on a negotiated wireless communication protocol according to the output voltage and/or the output current. The wireless discharging information is used for instructing the first device to adjust the transmitting power of the preset electromagnetic signal so as to output an electromagnetic signal suitable for discharging to the second device. That is, after the first device adjusts the transmission power of the preset electromagnetic signal, the second device may enable the charging voltage and/or the charging current output by the wireless charging and discharging circuit to meet the charging requirement of the battery in the second device in at least one of the trickle charging stage, the constant voltage charging stage and the constant current charging stage according to the received electromagnetic signal.
For example, when the battery in the second device is currently in the constant voltage charging stage, the charging voltage of the constant voltage charging stage is a, and at this time, it is detected that the output voltage of the wireless charging and discharging circuit is greater than a, the wireless discharging information may be sent to the first device, so that the first device adjusts the transmission power of the preset electromagnetic signal to restore the charging voltage of the second device to a again.
In one embodiment, the wireless charging and discharging method further includes: the step of transmitting an electromagnetic signal adapted to discharge the first device to the first device when the second device is a wireless transmitting device. Specifically, when the second device is a wireless transmitting device, the wireless charging information transmitted by the first device is received; and transmitting an electromagnetic signal suitable for charging the first device according to the wireless charging information, wherein the wireless charging information comprises at least one of the battery capacity, the charging demand current and the charging demand voltage of the first device.
In one embodiment, information used for safety protection, abnormality detection, or fault handling, such as temperature information of a battery, indication information of entering overvoltage protection or overcurrent protection, Charge state information (Charge Status), Error correction information (Control Error), and power transfer efficiency information (which may be used to indicate power transfer efficiency between the first device and the second device) may be interacted between the first device and the second device.
The embodiment of the application also provides a wireless charging and discharging method. In one embodiment the wireless charging method comprises steps 602 to 610.
and step 610, when the second device is a wireless transmitting device, stopping transmitting the preset electromagnetic signal, receiving the electromagnetic signal transmitted by the second device, and charging the first device.
In the wireless charging and discharging method, when the first device serves as a transmitting end of wireless charging, the first device can transmit the preset electromagnetic signal to the second device, the device type of the second device is identified, and when the second device serves as a wireless receiving device, the second device is discharged, so that safety is improved, and damage to the first device is avoided.
It should be understood that although the various steps in the flow charts of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
As shown in fig. 7, an embodiment of the present application further provides a wireless charging and discharging device. The wireless charging and discharging device provided by the embodiment of the application can be a receiving end of a wireless charging system and can also be a transmitting end of the wireless charging system.
In one embodiment, the wireless charging/discharging device includes: a battery module 710, a wireless transceiver circuit 720, a control module 730 and a charging and discharging circuit 740. The battery module 710, the charging and discharging circuit 740, and the wireless transceiver circuit 720 are sequentially connected, and the control module 730 is connected to the charging and discharging circuit 740. The charging and discharging circuit 740 is capable of magnetically inducing with an external wireless device, and is configured to transmit a predetermined electromagnetic signal and transmit/receive an electromagnetic signal.
When the wireless charging/discharging device is used as a receiving terminal for wireless charging, the transceiver coil in the wireless transceiver circuit 720 can receive an electromagnetic signal sent by a wireless external device (used as a transmitting terminal for wireless charging), convert the received electromagnetic signal into an alternating current signal, convert the received alternating current signal into a stable direct current signal through the charging/discharging circuit 740, and the direct current signal (the voltage and the current meet the requirement of the battery module 710) is suitable for the direct current signal for charging the battery module 710.
When the wireless charging and discharging device is used as a transmitting terminal for wireless charging, a transceiver coil in the wireless transceiver circuit 720 can transmit a preset electromagnetic signal to a wireless external device (used as a receiving terminal for wireless charging), and acquire the device type of the external wireless device according to response information of the external wireless device, and when the external wireless device is a wireless receiving device, the transceiver coil is used for adjusting the preset electromagnetic signal according to an output electric signal of the battery module 710 and discharging to the external wireless device; when the external wireless device is a wireless transmitting device, the wireless transceiver circuit 720 is controlled to stop transmitting the preset electromagnetic signal, and the wireless transceiver circuit is controlled to receive the electromagnetic signal transmitted by the external wireless device, and charge the battery module 710 according to the received electromagnetic signal.
In one embodiment, the battery type of the battery module 710 may include at least one of a lead-acid battery, a nickel-metal hydride battery, a sodium-sulfur battery, a flow battery, a super capacitor, a lithium battery, and a flexible battery. The number of batteries included in the battery module 710 may be 1, 2, 3, or more, and if the number of batteries is greater than 1, the batteries in the battery module 710 are connected in series. In one embodiment, the output voltage of each battery module 710 may range from 2.0 volts to 4.4 volts, and it should be understood that the output voltages of the battery modules 710 may or may not have the same range, and this is not further limited in this embodiment.
In one embodiment, the wireless transceiver circuit 720 is configured to generate magnetic induction with an external wireless device, and is configured to transmit a predetermined electromagnetic signal and to transmit and receive an electromagnetic signal. The wireless transceiver circuit 720 may include a transceiver coil and a capacitor in series with the transceiver coil. The wireless transceiver circuit 720 can convert the output current of the power module into ac power, and convert the ac power into an electromagnetic signal through the transceiver coil to be transmitted. Meanwhile, the wireless transceiver circuit 720 may also receive an electromagnetic signal transmitted by an external wireless device, convert the electromagnetic signal into an alternating current, and perform operations such as rectification and/or filtering on the alternating current.
In one embodiment, when the wireless charging/discharging device is used as a transmitting terminal for wireless charging, the transmitting/receiving coil of the wireless transmitting/receiving circuit 720 can receive the alternating current output by the charging/discharging circuit 740, the voltage signal of the alternating current is adjustable, and the transmitting/receiving coil can transmit a predetermined electromagnetic signal. Wherein the preset electromagnetic signal can be understood as a periodic resonant wave with a preset power. The frequency of the periodic resonant wave energy can enable the receiving and transmitting coil to work at a deviated LC resonance point, and can meet the minimum working frequency required by wireless communication between the wireless charging and discharging device and external wireless equipment, so that the resonant wave energy for communication is reduced, and the damage risk of the wireless charging device is further reduced. The preset electromagnetic signal is also used for activating the external wireless equipment and indicating the external wireless equipment to generate corresponding response information according to the equipment type.
In one embodiment, the wireless charging/discharging device and the external wireless device can wirelessly communicate based on the respective wireless transceiving circuits 720. For example, when the wireless charging/discharging device and the external wireless device perform wireless communication based on the Qi protocol, if the external wireless device is a wireless receiving device, the external wireless device may transmit the generated response information back to the wireless charging/discharging device by means of a power carrier. That is, the transceiver coil of the wireless charging and discharging device can receive response information generated by the external wireless device.
When the external wireless equipment is wireless transmitting equipment, the external wireless equipment cannot recognize the preset electromagnetic signal, namely error reporting occurs, the corresponding response information which can be generated can carry error reporting identification, and the response cannot be transmitted back to the wireless charging and discharging device.
In one embodiment, the control module 730 is connected to the transceiver circuit, and is configured to obtain the device type of the external wireless device according to the response information; and is also used for realizing the control of the processes of transmission, reception and the like. The control module 730 may be an integrated control unit, an application processor, or an independently configured MCU chip. For example, when the external wireless device is a wireless receiving device, the wireless receiving device is configured to adjust the preset electromagnetic signal according to the output electrical signal of the battery module 710 and discharge the preset electromagnetic signal to the external wireless device; when the external wireless device is a wireless transmitting device, the wireless transceiver circuit 720 is controlled to stop transmitting the preset electromagnetic signal, and the wireless transceiver circuit is controlled to receive the electromagnetic signal transmitted by the external wireless device, and charge the battery module 710 according to the received electromagnetic signal.
In one embodiment, the wireless charging and discharging apparatus further includes a wireless communication module connected to the control module 730, and configured to perform data transmission with the external wireless device, where the transmitted data may include response information, wireless charging information, and wireless discharging information.
The wireless communication between the wireless charging and discharging device and the external wireless equipment can be unidirectional communication or bidirectional communication. The wireless charging and discharging device and the wireless communication module in the external wireless device can receive the response information fed back by the external wireless device according to a preset wireless communication protocol, and the response information carries the device type.
The wireless charging and discharging device can also receive wireless discharging information output by external wireless equipment, wherein the wireless discharging information comprises at least one of battery capacity, discharging power, discharging current and discharging voltage of the external wireless equipment;
the wireless charging and discharging device can also send wireless charging information to the external wireless equipment, wherein the wireless charging information comprises at least one of battery capacity, charging current and charging voltage of the wireless charging and discharging device;
for example, the first device and the second device may communicate wirelessly via bluetooth (bluetooth), wireless fidelity (Wi-Fi), Near Field Communication (NFC) backscattering (backscatter) modulation (or power load modulation), or other Near Field Communication protocols.
In one embodiment, information used for safety protection, abnormality detection, or fault handling, such as temperature information of a battery, indication information of entering overvoltage protection or overcurrent protection, Charge state information (Charge Status), Error correction information (Control Error), and power transmission efficiency information (which may be used to indicate power transmission efficiency between the wireless charging apparatus and a device to be charged) may also be interacted between the wireless charging apparatus and an external wireless device.
In one embodiment, the charging and discharging circuit 740 includes a converting circuit 741 and a rectifying circuit 743. The conversion circuit 741 is connected to the control module 730 and the battery module 710, respectively. The converting circuit 741 may be referred to as a charging management module, such as an Integrated Circuit (IC). During the charging and discharging process of the battery module 710, the converting circuit 741 may be configured to perform voltage boosting and voltage dropping management on the charging and discharging signals (voltage and/or current) of the battery module 710. The conversion circuit 741 may include a voltage feedback function, and/or a current feedback function.
The rectifying circuit 743 is connected to the battery module 710 and the wireless transceiver circuit 720, respectively, and is configured to convert a direct current signal and an alternating current signal (AC/DC, DC/AC).
In one embodiment, the rectifying circuits 743 are respectively connected to the control module 730, an output voltage of the rectifying circuit 743 is adjustable, and under the control of the control module 730, the rectifying circuit 743 can output a preset discharging signal to enable the wireless transceiver circuit 720 to output an electromagnetic signal with a preset power.
In one embodiment, when the external wireless device is a wireless receiving device, the wireless charging and discharging device serves as a transmitting terminal to wirelessly charge the external wireless device. The conversion circuit 741 (e.g., a Boost circuit) may perform a Boost process on the AC signal output by the battery module 710, and the boosted AC signal may be output to a rectification circuit 743 (e.g., an AC/DC circuit), where the rectification circuit 743 may convert the AC signal into a DC signal.
In one embodiment, the control module 730 can further adjust the output voltage of the rectifying circuit 743 according to the wireless discharging information of the external wireless device acquired by the wireless communication module to adjust the transmitting power of the preset electromagnetic signal, so as to discharge the external wireless device according to the adjusted preset electromagnetic signal. The output voltage of the rectifying circuit 743 is positively correlated with the oscillation frequency of the transmitting and receiving coil. The higher the oscillation frequency of the transceiver coil is, the higher the power of the electromagnetic signal transmitted by the transceiver coil is. When the output voltage is larger, the power transmitted by the transceiver coil is also larger, and the power supply capability of the wireless charging device is also stronger.
In one embodiment, when the external wireless device is set as a wireless transmitter, the wireless charging/discharging device serves as a receiving end of wireless charging. When the external wireless device wirelessly charges the wireless charging/discharging device, the wireless transceiver circuit 720 of the wireless charging/discharging device can receive the electromagnetic signal of the external wireless device, convert the received electromagnetic signal into an ac signal, and output the ac signal to the rectifier circuit 743. The rectifying circuit 743 (e.g., an AC/DC circuit) is configured to convert the AC signal output by the wireless transceiver circuit 720 into a DC signal and output the DC signal to the converting circuit 741, and the converting circuit 741 (e.g., a Buck circuit) may perform a voltage reduction process on the received DC signal to obtain an electrical signal suitable for charging the battery module 710.
The wireless charging and discharging device provided by the embodiment can be used as a receiving end for wireless charging and can also be used as a transmitting end for wireless charging. When the wireless charging device is used as a wireless charging transmitting terminal, a preset electromagnetic signal can be sent to the external wireless equipment, the equipment type of the external wireless equipment is identified, and the external wireless equipment is discharged to the external wireless equipment when being used as a wireless receiving equipment, so that the safety is improved, and the damage of the wireless charging device is avoided.
The division of the modules in the charging control device is only for illustration, and in other embodiments, the charging control device may be divided into different modules as needed to complete all or part of the functions of the charging control device.
The respective modules in the charge control device described above may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of the wireless charging method.
A computer program product containing instructions which, when run on a computer, cause the computer to perform a wireless charging method.
Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and bus dynamic RAM (RDRAM).
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. A wireless charging and discharging method is applied to first equipment, wherein the first equipment comprises a transceiver coil, and the transceiver coil is used for sending a preset electromagnetic signal and transceiving an electromagnetic signal, and the method comprises the following steps:
sending a preset electromagnetic signal to second equipment; the preset electromagnetic signal is used for indicating the second equipment to generate response information;
acquiring the equipment type of the second equipment according to the response information;
when the second device is a wireless receiving device, adjusting the preset electromagnetic signal and discharging to the second device;
and when the second equipment is wireless transmitting equipment, stopping transmitting the preset electromagnetic signal.
2. The method of claim 1, wherein said transmitting a preset electromagnetic signal to a second device comprises:
the method comprises the steps that a receiving and transmitting coil of first equipment sends a preset electromagnetic signal to second equipment, wherein the preset electromagnetic signal is a periodic resonant wave with preset power, and the preset electromagnetic signal is also used for activating the second equipment.
3. The method of claim 2, wherein before sending the predetermined electromagnetic signal to the second device, the method further comprises:
and triggering a discharging instruction, and switching the working mode of the first equipment into the wireless discharging mode.
4. The method of claim 3, wherein the obtaining the device type of the second device according to the response information comprises:
in the wireless discharge mode, if the transceiver coil receives the response information, the device type is the wireless receiving device, and if the transceiver coil does not receive the response information in a preset period, the device type is the wireless transmitting device; or the like, or, alternatively,
and receiving the response information fed back by the second equipment according to a preset wireless communication link, wherein the response information carries the equipment type.
5. The method of claim 1, wherein the adjusting the preset electromagnetic signal and discharging to the second device when the device type is a wireless receiving device comprises:
receiving wireless discharging information sent by the second device, wherein the wireless discharging information comprises at least one of battery capacity, discharging power demand information, discharging demand current and discharging demand voltage of the second device;
and adjusting the transmitting power of the preset electromagnetic signal according to the wireless discharging information so as to discharge to the second equipment.
6. The method of claim 1, wherein before receiving the electromagnetic signal transmitted by the second device, the method comprises:
and switching the working mode of the first equipment into a wireless charging mode.
7. The method according to claim 6, wherein after stopping sending the preset electromagnetic signal, further comprising: a step of receiving an electromagnetic signal transmitted by the second device and charging the first device according to the received electromagnetic signal, wherein,
the receiving the electromagnetic signal sent by the second device and charging the first device according to the received electromagnetic signal includes:
sending wireless charging information of the first device to the second device, wherein the wireless charging information is used for instructing the second device to transmit an electromagnetic signal suitable for charging the first device, and the wireless charging information comprises at least one of battery capacity, charging demand current and charging demand voltage of the first device;
and the transceiver coil of the first device receives the electromagnetic signal and charges the first device in a wireless charging mode of the first device.
8. A wireless charging method applied to a second device, the method comprising:
receiving a preset electromagnetic signal transmitted by first equipment;
responding to the preset electromagnetic signal according to the equipment type to generate corresponding response information;
and feeding back the response information to the first equipment, and receiving the adjusted preset electromagnetic signal sent by the first equipment to charge the second equipment when the second equipment is wireless receiving equipment.
9. The method of claim 8, wherein the predetermined electromagnetic signal is received by a wireless charging and discharging circuit, the method further comprising:
detecting the output voltage and/or the output current of the wireless charging and discharging circuit;
and sending wireless discharge information to the first equipment according to the output voltage and/or the output current, wherein the wireless discharge information is used for indicating the first equipment to adjust the transmission power of the preset electromagnetic signal so as to discharge to the second equipment, and the wireless discharge information comprises at least one of battery capacity, discharge power demand information, discharge demand current and discharge demand voltage of the first equipment.
10. The method of claim 8, further comprising: a step of transmitting an electromagnetic signal adapted to discharge said first device to said first device, when said second device is a wireless transmitting device, wherein,
transmitting an electromagnetic signal adapted to discharge the first device to the first device when the second device is a wireless transmitting device, comprising:
when the second equipment is wireless transmitting equipment, receiving wireless charging information transmitted by the first equipment;
and transmitting an electromagnetic signal suitable for charging the first device according to the wireless charging information, wherein the wireless charging information comprises at least one of the battery capacity, the charging demand current and the charging demand voltage of the first device.
11. A wireless charging and discharging device is characterized by comprising:
the wireless receiving and transmitting circuit is used for generating magnetic induction with external wireless equipment, and is used for transmitting a preset electromagnetic signal and receiving and transmitting the electromagnetic signal, wherein the preset electromagnetic signal is used for indicating the external wireless equipment to generate response information;
the control module is connected with the wireless transceiving circuit and used for acquiring the equipment type of the external wireless equipment according to the response information;
the charging and discharging circuit is respectively connected with the wireless transceiving circuit and the control module, and is used for adjusting the preset electromagnetic signal and discharging to the external wireless equipment when the external wireless equipment is wireless receiving equipment; and when the external wireless equipment is wireless transmitting equipment, controlling the wireless receiving and transmitting circuit to stop transmitting the preset electromagnetic signal.
12. The wireless charging and discharging device according to claim 11, further comprising a battery module, wherein the charging and discharging circuit comprises:
the conversion circuit is respectively connected with the control module and the battery module, and is used for boosting the alternating current signal output by the battery module when the external wireless equipment is wireless receiving equipment, and is used for reducing the voltage of the received direct current signal when the external wireless equipment is wireless transmitting equipment so as to generate an electric signal suitable for charging the battery module;
the rectifying circuit is respectively connected with the control module, the conversion circuit and the wireless transceiver circuit and is used for converting the alternating current signal output by the wireless transceiver circuit into the direct current signal and converting the alternating current signal output by the battery module into the direct current signal; and the wireless transceiver circuit is also used for outputting a preset discharging signal according to the adjusting instruction output by the control module so as to enable the wireless transceiver circuit to output an electromagnetic signal with preset power.
13. The wireless charging and discharging device according to claim 11, further comprising:
and the wireless communication module is connected with the control module and is used for carrying out data transmission with the external wireless equipment.
14. An electronic device, comprising: the wireless charging and discharging device according to any one of claims 11 to 13.
Priority Applications (2)
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| CN201911076416.0A CN112769246A (en) | 2019-11-06 | 2019-11-06 | Wireless charging and discharging method, wireless charging and discharging device and electronic equipment |
| PCT/CN2020/126370 WO2021088844A1 (en) | 2019-11-06 | 2020-11-04 | Wireless charging and discharging method, wireless charging and discharging apparatus and electronic device |
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| CN201911076416.0A CN112769246A (en) | 2019-11-06 | 2019-11-06 | Wireless charging and discharging method, wireless charging and discharging device and electronic equipment |
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Application publication date: 20210507 |