CN115986962A - Control method of wireless charging device and wireless charging device - Google Patents
Control method of wireless charging device and wireless charging device Download PDFInfo
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- CN115986962A CN115986962A CN202310270535.XA CN202310270535A CN115986962A CN 115986962 A CN115986962 A CN 115986962A CN 202310270535 A CN202310270535 A CN 202310270535A CN 115986962 A CN115986962 A CN 115986962A
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Abstract
The application discloses a control method of a wireless charging device and the wireless charging device, and belongs to the technical field of wireless charging. The method comprises the following steps: under the condition that the wireless charging device is in a standby mode, controlling the full-bridge transmitter to perform foreign matter detection according to a first time interval to acquire foreign matter detection information; under the condition that the target access equipment exists in the power transmission range of the wireless charging device based on the foreign matter detection information, the control switch unit is switched to a conducting state, and the second control unit and the power supply of the radio frequency tag transceiver are conducted; controlling a second control unit to drive the radio frequency label transceiver to carry out radio frequency label detection according to a second time interval, and acquiring target detection information of the target access equipment; and controlling the full-bridge transmitter to detect foreign matters according to a first time interval under the condition that the target access equipment is determined to comprise the radio frequency tag based on the target detection information, and acquiring the foreign matter detection information. The method can effectively reduce the electric quantity consumption of the wireless charging device.
Description
Technical Field
The present application belongs to the field of wireless charging technologies, and in particular, to a control method for a wireless charging device and a wireless charging device.
Background
Wireless charging, also known as inductive charging and non-contact charging, is a new charging technology that is derived from wireless power transmission technology. Wireless charging technology utilizes near-field induction, where wireless charging devices transfer energy to devices to be charged, and the devices use the received energy to charge batteries and provide energy for the operation of the devices themselves. Because the energy is transmitted between the wireless charger and the charging equipment through inductive coupling, no electric wire is needed for connection, and no conductive contact is exposed.
At present, when a wireless charging transmitting terminal transmits power at any stage, a radio frequency tag (NFC/RFID) in a transmitting range may be damaged, a QI protocol specifies that the wireless charging transmitting terminal needs to detect the radio frequency tag regularly before transmitting power to judge whether the radio frequency tag is accessed, and when the wireless charging transmitting terminal transmits power at any stage, the radio frequency tag needs to detect regularly, which can result in the increase of the power consumption of the wireless charging transmitting terminal.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the present application provides a control method of a wireless charging device and the wireless charging device, which reduce power consumption of the wireless charging device.
In a first aspect, the present application provides a method for controlling a wireless charging device, where the wireless charging device includes a radio frequency tag detection system, the radio frequency tag detection system includes a first control unit, a full-bridge transmitter, a second control unit, a radio frequency tag transceiver and a switch unit, the first control unit is connected to the full-bridge transmitter, the second control unit and the switch unit, the radio frequency tag transceiver is connected to the second control unit and the switch unit, and the method is applied to the first control unit, and includes:
under the condition that the wireless charging device is in a standby mode, controlling the full-bridge transmitter to detect foreign matters according to a first time interval to obtain foreign matter detection information;
controlling the switch unit to be switched to a conducting state and conducting the second control unit and the power supply of the radio frequency tag transceiver under the condition that the target access equipment exists in the power transmitting range of the wireless charging device based on the foreign matter detection information;
controlling the second control unit to drive the radio frequency tag transceiver to perform radio frequency tag detection according to a second time interval, and acquiring target detection information of the target access equipment;
and controlling the full-bridge transmitter to detect foreign matters according to the first time interval under the condition that the target access equipment is determined to comprise the radio frequency tag based on the target detection information, and acquiring the foreign matter detection information.
According to the control method of the wireless charging device, the foreign matter detection is executed in the standby mode, when the condition that equipment is accessed in the power transmission range is judged, the power supply of the second control unit and the power supply of the radio frequency tag transceiver are conducted, the radio frequency tag detection is executed, and the electric quantity consumption of the wireless charging device can be effectively reduced.
According to an embodiment of the present application, the obtaining target detection information of the target access device includes:
and under the condition that the target detection information fed back by the second control unit is determined to be received, the switch unit is controlled to be switched to an off state, and the power supply of the second control unit and the radio frequency tag transceiver is cut off.
According to an embodiment of the present application, after the obtaining of the target detection information of the target access device, the method further includes:
controlling the full-bridge transmitter to establish a communication connection with the target access device if it is determined that the target access device does not include a radio frequency tag based on the target detection information;
and under the condition that the communication connection between the wireless charging device and the target access equipment is successfully established, controlling the wireless charging device to be switched to a transmission power mode to charge the target access equipment.
According to an embodiment of the application, after the controlling the full-bridge transmitter to establish a communication connection with the target access device, the method further comprises:
and determining that the target access equipment is a metal foreign object if the communication connection between the wireless charging device and the target access equipment is not established successfully.
According to an embodiment of the present application, the determining, based on the foreign object detection information, that a target access device exists within a power transmission range of the wireless charging apparatus includes:
determining that a first access device exists within a power transmission range of the wireless charging apparatus when the foreign object detection information is smaller than a first detection threshold;
and determining that the first access device is the target access device when the foreign object detection information is greater than or equal to a second detection threshold, wherein the second detection threshold is smaller than the first detection threshold.
According to one embodiment of the application, after the determining that the first access device is present within the power transmission range of the wireless charging apparatus, the method further comprises:
and determining that the first access device is a metal foreign object when the foreign object detection information is smaller than the second detection threshold.
According to an embodiment of the application, the method further comprises:
under the condition that the wireless charging device is in a transmitting power mode, controlling the second control unit to drive the radio frequency tag transceiver to detect the radio frequency tag according to a third time interval;
and under the condition that the radio frequency tag is accessed in the power transmission range of the wireless charging device, stopping transmitting power and controlling the full-bridge transmitter to perform foreign matter detection according to a fourth time interval.
According to an embodiment of the present application, the transmission power mode includes a Ping phase, a configuration phase, a negotiation phase, a calibration phase, and a power transmission phase, where a time interval between the Ping phase, the configuration phase, and the negotiation phase for performing radio frequency tag detection is a fifth time interval, a time interval between the calibration phase and the power transmission phase for performing radio frequency tag detection is a sixth time interval, and the sixth time interval is smaller than the fifth time interval.
In a second aspect, the present application provides a wireless charging apparatus, the apparatus comprising:
the radio frequency tag detection system comprises a first control unit, a full-bridge transmitter, a second control unit, a radio frequency tag transceiver and a switch unit, wherein the first control unit is respectively connected with the full-bridge transmitter, the second control unit and the switch unit, the radio frequency tag transceiver is respectively connected with the second control unit and the switch unit, and the first control unit is used for executing the control method of the wireless charging device in the first aspect;
and the charging control system is connected with the radio frequency tag detection system and is used for charging the target access equipment.
According to the wireless charging device, the foreign matter detection is executed in the standby mode, when the condition that equipment is connected in the power transmission range is judged, the power supply of the second control unit and the radio frequency label transceiver is switched on, the radio frequency label detection is executed, and the electric quantity consumption of the wireless charging device can be effectively reduced.
According to an embodiment of the present application, further comprising:
the wireless transmitting chip integrates the first control unit and the full-bridge inverter circuit, a first end of the wireless transmitting chip is connected with a first capacitor, a second end of the wireless transmitting chip is connected with a second capacitor, a resonant capacitor and a resonant coil are connected between the first capacitor and the second capacitor, the full-bridge transmitter comprises the first capacitor, the second capacitor, the resonant capacitor and the resonant coil, a third end of the wireless transmitting chip is connected with one end of a detection resistor, the other end of the detection resistor is connected between the resonant capacitor and the resonant coil, and the detection resistor is used for executing foreign matter detection;
the wireless radio frequency chip integrates the second control unit and the radio frequency receiving and sending circuit, the radio frequency receiving and sending circuit is connected with the radio frequency antenna, and the radio frequency label transceiver comprises the radio frequency receiving and sending circuit and the radio frequency antenna.
In a third aspect, the present application provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the control method of the wireless charging apparatus according to the first aspect when executing the computer program.
In a fourth aspect, the present application provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the wireless charging apparatus as described in the first aspect above.
In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the method of controlling a wireless charging apparatus as described in the first aspect above.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flowchart illustrating a control method of a wireless charging device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wireless charging device according to an embodiment of the present disclosure;
fig. 3 is a second schematic structural diagram of a wireless charging device according to an embodiment of the present disclosure;
fig. 4 is a second flowchart illustrating a control method of a wireless charging apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Reference numerals:
a first control unit 210, a full-bridge transmitter 220, a second control unit 230, a radio frequency tag transceiver 240, and a switch unit 250.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The control method of the wireless charging device, the electronic device and the readable storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
The wireless charging device can comprise a radio frequency tag detection system and a charging control system, wherein the radio frequency tag detection system is used for detecting whether a radio frequency tag is accessed, and the charging control system is used for charging equipment.
As shown in fig. 2, the radio frequency tag detection system includes a first control unit 210, a full-bridge transmitter 220, a second control unit 230, a radio frequency tag transceiver 240, and a switching unit 250.
The first control unit 210 is connected to the full-bridge transmitter 220, the second control unit 230 and the switch unit 250, respectively, and the rfid transceiver 240 is connected to the second control unit 230 and the switch unit 250, respectively.
The first control unit 210 may communicate with the wireless charging reception device, control the full-bridge transmitter 220 to perform analog ping, foreign object detection, transmission power, and the like, control the on/off of the switch unit 250, and communicate with the second control unit 230.
The rf tag transceiver 240 may detect the rf tag and transmit and receive data with the rf tag, and the second control unit 230 may control the rf tag transceiver 240 to detect and communicate the rf tag (e.g., NFC, RFID, etc.), process the detection information of the rf tag, and transmit the detection information to the first control unit 210.
When the switch unit 250 is in the on state, the second control unit 230 and the power supply of the radio frequency tag transceiver 240 are turned on, and the second control unit 230 may control the radio frequency tag transceiver 240 to perform radio frequency tag detection; when the switch unit 250 is in the off state, the power of the second control unit 230 and the rfid transceiver 240 is cut off, and the second control unit 230 and the rfid transceiver 240 cannot operate and do not consume electric power.
The method for controlling the wireless charging apparatus according to the embodiment of the present application may be applied to the first control unit 210 in the wireless charging apparatus.
As shown in fig. 1, the method for controlling the wireless charging apparatus includes: step 110 to step 140.
When the wireless charging device is in the standby mode, the first control unit 210 controls the full-bridge transmitter 220 to continuously perform foreign object detection according to a first time interval, and obtains foreign object detection information to determine whether an access device exists in a power transmission range of the wireless charging device, and whether the access device belongs to a wireless charging receiving device or an external metal foreign object.
In practical implementation, the first control unit 210 controls the full-bridge transmitter 220 to continuously perform the foreign object detection at a first time interval, and the foreign object detection may be an analog ping, a Q-value detection, or other detection methods.
Step 120, controlling the switch unit 250 to switch to the conducting state and conducting the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 under the condition that it is determined that the target access device exists in the power transmission range of the wireless charging apparatus based on the foreign object detection information.
In this step, it is determined that the target access device exists within the power transmission range of the wireless charging apparatus based on the foreign object detection information, and the first control unit 210 controls the switch unit 250 to switch to the on state, and turns on the power supplies of the second control unit 230 and the radio frequency tag transceiver 240.
The first control unit 210 controls the second control unit 230 to drive the radio frequency tag transceiver 240 to perform multiple radio frequency tag detections according to the second time interval, so as to obtain target detection information of the target access device, and determine whether the target access device includes a radio frequency tag.
In actual implementation, the first control unit 210 controls the switch unit 250 to switch to the on state, and turns on the power supplies of the second control unit 230 and the radio frequency tag transceiver 240, the first control unit 210 notifies the second control unit 230 to perform the radio frequency tag detection, and the second control unit 230 controls the radio frequency tag transceiver 240 to perform the radio frequency tag detection according to the second time interval.
Step 140, under the condition that the target access device is determined to include the radio frequency tag based on the target detection information, controlling the full-bridge transmitter 220 to perform foreign object detection according to the first time interval, and acquiring the foreign object detection information.
In this step, when the target access device is determined to include the radio frequency tag according to the target detection information of the target access device, the target access device does not need to be further processed, and the full-bridge transmitter 220 continues to be controlled at the first time interval to perform the foreign object detection, so as to obtain the corresponding foreign object detection information.
The target detection information is used for judging whether target access equipment in a power transmission range of the wireless charging device comprises a radio frequency tag or not.
In actual implementation, based on the target detection information, it is determined that the target access device includes a radio frequency tag, which may be an independent radio frequency tag, or a radio frequency tag carried by the wireless charging receiving device, for example, a door card, a bus card, and the like held in a mobile phone shell of a mobile phone.
In the related art, the wireless charging transmitting terminal periodically detects and judges whether the radio frequency tag is connected before transmitting power, so that the power consumption of the wireless charging transmitting terminal is increased.
In the embodiment of the present application, the wireless charging device is in the standby mode, only when it is determined that there is an access of a device within the power transmission range, the radio frequency tag detection is performed, it is determined whether the access device includes a radio frequency tag, the access device enters a normal no-load condition, only the foreign object detection is performed, the foreign object detection and the radio frequency tag detection are combined, and only when the radio frequency tag detection is performed, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and compared with the related art, the standby mode also needs to perform the tag detection periodically, the power consumption is lower, and the service time of the mobile power supply with the wireless charging function is prolonged.
According to the control method of the wireless charging device in the embodiment of the application, by performing the foreign object detection in the standby mode, when it is determined that the device access exists within the power transmission range, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on to perform the radio frequency tag detection, so that the power consumption of the wireless charging device can be effectively reduced.
In some embodiments, the step 130 of obtaining the target detection information of the target access device includes:
in the case where it is determined that the target detection information fed back by the second control unit 230 is received, the control switch unit 250 is switched to the off state, and the power of the second control unit 230 and the radio frequency tag transceiver 240 is cut off.
The first control unit 210 controls the switch unit 250 to switch to the on state, and after the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, the first control unit 210 notifies the second control unit 230 to perform the radio frequency tag detection, and the second control unit 230 controls the radio frequency tag transceiver 240 to perform the radio frequency tag detection according to the second time interval.
After the detection action of the rf tag transceiver 240 is finished, the second control unit 230 receives the target detection information of the rf tag transceiver 240 and feeds the target detection information back to the first control unit 210, and when the first control unit 210 receives the target detection information, the switch unit 250 is controlled to close the switch, so as to cut off the power supply of the second control unit 230 and the rf tag transceiver 240.
In this embodiment, only when the second control unit 230 and the rfid transceiver 240 perform rfid detection, the power supplies of the second control unit 230 and the rfid transceiver 240 are turned on, and after the rfid is finished, the power supplies of the second control unit 230 and the rfid transceiver 240 are immediately turned off, so as to further reduce the power consumption of the wireless charging device.
In some embodiments, after obtaining the target detection information of the target access device in step 130, the method for controlling the wireless charging apparatus may further include:
controlling the full-bridge transmitter 220 to establish communication connection with the target access device under the condition that the target access device does not include the radio frequency tag based on the target detection information;
and under the condition that the communication connection between the wireless charging device and the target access equipment is successfully established, controlling the wireless charging device to be switched to a transmission power mode to charge the target access equipment.
In this embodiment, when determining that the target access device does not include the radio frequency tag according to the target detection information, it is necessary to determine whether the target access device belongs to the wireless charging receiving device.
In actual implementation, the first control unit 210 may control the full-bridge transmitter 220 to perform a digitalping in an attempt to establish a communication connection with a target access device.
When the communication connection between the wireless charging device and the target access equipment is successfully established and the target access equipment is judged to belong to the wireless charging receiving equipment, the wireless charging device can be switched to a transmitting power mode to charge the target access equipment.
In some embodiments, in the event that the communication connection between the wireless charging apparatus and the target access device is not established successfully, the target access device is determined to be a metallic foreign object.
In this embodiment, when the communication connection between the wireless charging apparatus and the target access device is not established successfully, it is determined that the target access device is an external metal foreign object, and the first control unit 210 continues to control the full-bridge transmitter 220 to perform the foreign object detection at the first time interval.
In some embodiments, the step 120 of determining that the target access device exists within the power transmission range of the wireless charging apparatus based on the foreign object detection information may include:
determining that first access equipment exists in a power transmission range of the wireless charging device under the condition that the foreign object detection information is smaller than a first detection threshold value;
and determining the first access equipment as the target access equipment when the foreign matter detection information is larger than or equal to the second detection threshold.
Wherein the second detection threshold is less than the first detection threshold.
In this embodiment, the first control unit 210 controls the full-bridge transmitter 220 to perform foreign object detection at a first time interval, and compares the foreign object detection information with a first detection threshold and a second detection threshold to determine whether a target access device exists within a power transmission range of the wireless charging apparatus.
When the foreign matter detection information is smaller than the first detection threshold value, it is judged that equipment access exists in the power transmission range of the wireless charging device, namely the first access equipment exists in the power transmission range of the wireless charging device.
In this embodiment, whether the first access device is an external metal foreign object is preliminarily screened through the second detection threshold, when the foreign object detection information is greater than or equal to the second detection threshold, it is determined that the first access device is an external metal foreign object, and a radio frequency tag may exist in the first access device, and then the first access device is determined to be a target access device, and radio frequency tag detection is subsequently performed on the target access device.
In some embodiments, after determining that the first access device is present within the power transmission range of the wireless charging apparatus, the method of controlling the wireless charging apparatus may further comprise:
and under the condition that the foreign matter detection information is smaller than the second detection threshold value, determining that the first access equipment is the metal foreign matter.
In this embodiment, when the foreign object detection information is smaller than the second detection threshold, it is determined that the first access device is an external metal foreign object, and it is not necessary to further determine whether the first access device has a radio frequency tag, and it is not necessary to perform radio frequency tag detection.
It can be understood that the first detection threshold is a critical value for determining whether the device is connected to the power transmission range of the wireless charging apparatus, and the second detection threshold is a critical value for primarily determining whether the device in the power transmission range of the wireless charging apparatus is a metal foreign object.
In some embodiments, the control method of the wireless charging apparatus may further include:
under the condition that the wireless charging device is in the transmission power mode, controlling the second control unit 230 to drive the radio frequency tag transceiver 240 to perform radio frequency tag detection according to a third time interval;
and under the condition that the radio frequency tag is accessed in the power transmission range of the wireless charging device, stopping transmitting power, and controlling the full-bridge transmitter 220 to perform foreign matter detection according to a fourth time interval.
The wireless charging device is in a transmission power mode to charge the wireless charging receiving device, and the first control unit 210 controls the second control unit 230 to drive the radio frequency tag transceiver 240 to perform radio frequency tag detection according to a third time interval, so as to determine whether a radio frequency tag is accessed within a power transmission range of the wireless charging device.
When the fact that a radio frequency tag is accessed in the power emission range of the wireless charging device is determined, stopping power emission, and avoiding damage to the radio frequency tag in the power emission range; and when the fact that no radio frequency tag is accessed in the power transmission range of the wireless charging device is determined, continuing to detect the radio frequency tag at a third time interval.
In this embodiment, it is determined that the radio frequency tag is accessed within the power transmission range of the wireless charging device, the transmission power is stopped, and the radio frequency tag is prevented from being damaged, and meanwhile, the first control unit 210 controls the full-bridge transmitter 220 to perform the foreign object detection according to the fourth time interval, so as to reduce the power consumption of the wireless charging device.
It should be noted that, when the radio frequency tag detection is executed in the transmission power mode, only when the detection time node corresponding to the third time interval is reached, the first control unit 210 controls the switch unit 250 to switch to the on state, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and the power supplies are turned off in the rest of time, so that the average current of the wireless charging device system is smaller, and the power consumption is lower.
In some embodiments, the transmit power mode includes a Ping phase, a configuration phase, a negotiation phase, a calibration phase, and a power transmission phase.
The time interval for detecting the radio frequency label in the Ping stage, the configuration stage and the negotiation stage is a fifth time interval, the time interval for detecting the radio frequency label in the calibration stage and the power transmission stage is a sixth time interval, and the sixth time interval is smaller than the fifth time interval.
A specific embodiment is described below.
As shown in fig. 4, after the system is powered on, in the standby mode, the first control unit 210 controls the full-bridge transmitter 220 to continuously perform the foreign object detection at a first time interval.
And comparing the detected result of the foreign object detection with a first detection threshold and a second detection threshold, and judging that equipment access exists in the power transmission range when the detected result is smaller than the first detection threshold and larger than the second detection threshold.
The first control unit 210 controls the second control unit 230 to perform NFC/RFID detection n times, i.e. radio frequency tag detection, at a second time interval to determine whether the access device includes an NFC/RFID tag.
And when the access device does not contain the NFC/RFID tag, controlling the full-bridge transmitter 220 to perform digital ping, establishing communication with the access device, and entering a power transmission mode to charge the access device after the communication is successfully established.
And in the power transmission mode, continuing NFC/RFID detection at a third time interval, judging whether an NFC/RFID label is included, stopping transmitting power when the NFC/RFID label is judged to exist, and returning to foreign matter detection.
It should be noted that, the specific values of the first time interval, the second time interval, the third time interval, the fourth time interval, the fifth time interval, and the sixth time interval, and the first detection threshold and the second detection threshold may be adjusted and set according to actual requirements, which is not limited in this embodiment of the application.
In this embodiment, the foreign object detection is performed in the standby mode, so that the power consumption of the wireless charging device can be effectively reduced, the radio frequency tag detection is performed in the transmission power mode, only when the detection time node corresponding to the third time interval is reached, the first control unit 210 controls the switch unit 250 to switch to the conducting state, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and the power supplies are turned off in the rest of time, so that the average current of the wireless charging device system is smaller, and the power consumption is lower.
The embodiment of the application also provides a wireless charging device which comprises a radio frequency label detection system and a charging control system.
The charging control system is connected with the radio frequency tag detection system and used for charging the target access equipment.
As shown in fig. 2, the radio frequency tag detection system includes a first control unit 210, a full-bridge transmitter 220, a second control unit 230, a radio frequency tag transceiver 240 and a switch unit 250, wherein the first control unit 210 is connected with the full-bridge transmitter 220, the second control unit 230 and the switch unit 250, respectively, and the radio frequency tag transceiver 240 is connected with the second control unit 230 and the switch unit 250, respectively.
In this embodiment, the first control unit 210 may be configured to execute the control method of the wireless charging apparatus described above.
According to the wireless charging device provided by the embodiment of the application, when the foreign object detection is performed in the standby mode and the device access is determined to exist in the power transmission range, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on to perform the radio frequency tag detection, so that the power consumption of the wireless charging device can be effectively reduced.
The radio frequency tag detection is executed in the transmission power mode, and only when the detection time node corresponding to the third time interval is reached, the first control unit 210 controls the switch unit 250 to switch to the on state, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and the power supplies are cut off in the rest time, so that the average current of the wireless charging device system is smaller, and the power consumption is lower.
In some embodiments, the wireless charging device includes a wireless transmitting chip and a wireless radio frequency chip.
As shown in fig. 3, a wireless transmitting chip (shown as U1) integrates the first control unit 210 and the full-bridge inverter circuit, a first end of the wireless transmitting chip is connected to a first capacitor (shown as C1), a second end of the wireless transmitting chip is connected to a second capacitor (shown as C2), and a resonant capacitor (shown as C3) and a resonant coil (shown as L1) are connected between the first capacitor and the second capacitor.
The wireless transmitting Chip may be a System On Chip (SOC), and the first control unit 210 integrated on the wireless transmitting Chip is a control center of the radio frequency tag detection System.
The full-bridge inverter circuit on the wireless transmitting chip, the first capacitor, the second capacitor, the resonant capacitor and the resonant coil form a full-bridge transmitter 220.
In this embodiment, the foreign matter detection work can be completed by the first control unit 210 and the detection resistor.
The third end of the wireless transmitting chip is connected with one end of a detection resistor (shown as R1), the other end of the detection resistor is connected between the resonant capacitor and the resonant coil, and the detection resistor is used for executing foreign object detection, where VIN and VDD indicate voltage access of the radio frequency tag detection system of the wireless charging device.
The wireless RF chip (shown as U2) integrates the second control unit 230 and an RF transceiver circuit, the RF transceiver circuit is connected to an RF antenna (shown as RF 1), and the RF tag transceiver 240 includes an RF transceiver circuit and an RF antenna.
As shown in fig. 3, the switch unit 250 may include a PMOS transistor (shown as Q1) and an NMOS transistor (shown as Q2), through which the second control unit 230 and the rf tag transceiver 240 are powered on and off.
A specific example of the operation of the wireless charging device is described below.
In the standby mode, the wireless transmitting chip controls the full-bridge transmitter 220 to continuously perform Q value detection at a first time interval (e.g., 300 ms), and the Q value detection is used to determine whether the access device belongs to the wireless charging receiving device or to an external metallic foreign object.
If the Q value detected by the Q value detection is lower than a first detection threshold (for example, the first detection threshold is 20), the device is considered to be accessed, otherwise, the Q value detection is continued.
If the measured Q value is lower than a second detection threshold (for example, the first detection threshold is 10), the access device is considered as an external metal foreign object, the radio frequency tag detection is not carried out on the access device, and the Q value detection is continuously carried out at intervals of 300ms until the foreign object is removed.
If the measured Q value is higher than the second detection threshold, the system cannot determine whether the access device is a wireless charging receiving device or an external metal foreign object, and needs to perform radio frequency tag detection 3 times at a second time interval (e.g., 300 ms), determine whether the access device contains an NFC tag, and if so, continue to perform Q value detection at the first time interval.
When the radio frequency tag detection is executed, the wireless transmitting chip can output a high level to a gate end of the NMOS tube to control the NMOS tube to be opened, when the NMOS tube is opened, the PMOS tube is opened, VDD is conducted to a power input end of the wireless radio frequency chip through the PMOS tube, the wireless transmitting chip informs the wireless radio frequency chip to carry out the radio frequency tag detection, and the wireless radio frequency chip controls the radio frequency tag transceiver 240 to carry out the radio frequency tag detection.
After the radio frequency label detection action is finished, the wireless radio frequency chip processes the received detection information and feeds the detection information back to the wireless transmitting chip, the wireless transmitting chip outputs low level to a gate end of the NMOS tube to control the NMOS tube to be closed, when the NMOS tube is closed, the PMOS tube is closed, and the power supply input of the wireless radio frequency chip is cut off.
And performing radio frequency tag detection, when the access device does not contain an NFC tag is determined, the first control unit 210 controls the full-bridge transmitter 220 to perform Digital Ping, if communication is successfully established with the access device, the access device is considered to be a wireless charging receiving device, otherwise, the access device is considered to be an external metal foreign object, and Q value detection is continuously performed at a first time interval.
After the access device is identified as a wireless charging receiving device, the radio frequency tag detection is continuously performed at a fifth time interval (for example, 300 ms) in the Ping phase, the configuration phase and the negotiation phase, and the radio frequency tag detection is continuously performed at a sixth time interval (for example, 50 ms) in the calibration phase and the power transmission phase.
And detecting the radio frequency tag, judging whether the radio frequency tag is accessed in the transmitting range, if so, stopping transmitting power, and continuously detecting the Q value at a first time interval, otherwise, continuously detecting the radio frequency tag.
In some embodiments, as shown in fig. 5, an electronic device 500 is further provided in the embodiments of the present application, and includes a processor 501, a memory 502, and a computer program stored in the memory 502 and capable of running on the processor 501, where the computer program is executed by the processor 501 to implement the processes in the above-described embodiments of the control method for a wireless charging apparatus, and can achieve the same technical effects, and is not described herein again to avoid repetition.
It should be noted that the electronic device in the embodiment of the present application includes the mobile electronic device and the non-mobile electronic device described above.
The embodiment of the present application further provides a non-transitory computer readable storage medium, where a computer program is stored on the non-transitory computer readable storage medium, and when executed by a processor, the computer program implements each process of the control method embodiment of the wireless charging device, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read only memory ROM, a random access memory RAM, a magnetic or optical disk, and the like.
An embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for controlling the wireless charging apparatus is implemented.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read only memory ROM, a random access memory RAM, a magnetic or optical disk, and the like.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the control method embodiment of the wireless charging device, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method of a wireless charging device is characterized in that the wireless charging device comprises a radio frequency label detection system, the radio frequency label detection system comprises a first control unit, a full-bridge transmitter, a second control unit, a radio frequency label transceiver and a switch unit, the first control unit is respectively connected with the full-bridge transmitter, the second control unit and the switch unit, the radio frequency label transceiver is respectively connected with the second control unit and the switch unit, the method is applied to the first control unit, and the method comprises the following steps:
under the condition that the wireless charging device is in a standby mode, controlling the full-bridge transmitter to detect foreign matters according to a first time interval to obtain foreign matter detection information;
controlling the switch unit to be switched to a conducting state and conducting the second control unit and the power supply of the radio frequency tag transceiver under the condition that the target access equipment exists in the power transmitting range of the wireless charging device based on the foreign matter detection information;
controlling the second control unit to drive the radio frequency tag transceiver to perform radio frequency tag detection according to a second time interval, and acquiring target detection information of the target access equipment;
and under the condition that the target access equipment comprises the radio frequency tag, controlling the full-bridge transmitter to detect foreign matters according to the first time interval to obtain the foreign matter detection information.
2. The method of claim 1, wherein the obtaining the target detection information of the target access device comprises:
and under the condition that the target detection information fed back by the second control unit is determined to be received, controlling the switch unit to be switched to an off state, and cutting off the power supply of the second control unit and the radio frequency tag transceiver.
3. The method of claim 1, wherein after the obtaining the target detection information of the target access device, the method further comprises:
controlling the full-bridge transmitter to establish a communication connection with the target access device if it is determined that the target access device does not include a radio frequency tag based on the target detection information;
and under the condition that the communication connection between the wireless charging device and the target access equipment is successfully established, controlling the wireless charging device to be switched to a transmission power mode to charge the target access equipment.
4. The method of claim 3, wherein after the controlling the full-bridge transmitter to establish a communication connection with the target access device, the method further comprises:
if the communication connection between the wireless charging device and the target access equipment is not established successfully, determining that the target access equipment is a metal foreign object.
5. The method of claim 1, wherein the determining that the target access device is present within the power transmission range of the wireless charging apparatus based on the foreign object detection information comprises:
determining that a first access device exists within a power transmission range of the wireless charging apparatus when the foreign object detection information is smaller than a first detection threshold;
and determining that the first access device is the target access device when the foreign object detection information is greater than or equal to a second detection threshold, wherein the second detection threshold is smaller than the first detection threshold.
6. The method of claim 5, wherein after the determining that the first access device is present within the power transmission range of the wireless charging apparatus, the method further comprises:
and determining that the first access device is a metal foreign object when the foreign object detection information is smaller than the second detection threshold.
7. The method for controlling a wireless charging apparatus according to any one of claims 1 to 6, further comprising:
under the condition that the wireless charging device is in a transmitting power mode, controlling the second control unit to drive the radio frequency tag transceiver to detect the radio frequency tag according to a third time interval;
and under the condition that the radio frequency tag is accessed in the power transmission range of the wireless charging device, stopping transmitting power and controlling the full-bridge transmitter to detect foreign matters according to a fourth time interval.
8. The method according to claim 7, wherein the transmission power mode includes a Ping phase, a configuration phase, a negotiation phase, a calibration phase, and a power transmission phase, a time interval between the Ping phase, the configuration phase, and the negotiation phase for rf tag detection is a fifth time interval, a time interval between the calibration phase and the power transmission phase for rf tag detection is a sixth time interval, and the sixth time interval is smaller than the fifth time interval.
9. A wireless charging device, comprising:
a radio frequency tag detection system, comprising a first control unit, a full-bridge transmitter, a second control unit, a radio frequency tag transceiver and a switch unit, wherein the first control unit is respectively connected with the full-bridge transmitter, the second control unit and the switch unit, the radio frequency tag transceiver is respectively connected with the second control unit and the switch unit, and the first control unit is used for executing the control method of the wireless charging device according to any one of claims 1 to 8;
and the charging control system is connected with the radio frequency tag detection system and is used for charging the target access equipment.
10. The wireless charging apparatus of claim 9, further comprising:
the wireless transmitting chip integrates the first control unit and the full-bridge inverter circuit, a first end of the wireless transmitting chip is connected with a first capacitor, a second end of the wireless transmitting chip is connected with a second capacitor, a resonant capacitor and a resonant coil are connected between the first capacitor and the second capacitor, the full-bridge transmitter comprises the first capacitor, the second capacitor, the resonant capacitor and the resonant coil, a third end of the wireless transmitting chip is connected with one end of a detection resistor, the other end of the detection resistor is connected between the resonant capacitor and the resonant coil, and the detection resistor is used for executing foreign matter detection;
the wireless radio frequency chip integrates the second control unit and the radio frequency receiving and transmitting circuit, the radio frequency receiving and transmitting circuit is connected with the radio frequency antenna, and the radio frequency tag transceiver comprises the radio frequency receiving and transmitting circuit and the radio frequency antenna.
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