CN115986962B - 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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- CN115986962B CN115986962B CN202310270535.XA CN202310270535A CN115986962B CN 115986962 B CN115986962 B CN 115986962B CN 202310270535 A CN202310270535 A CN 202310270535A CN 115986962 B CN115986962 B CN 115986962B
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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 detect the foreign matters according to a first time interval, and acquiring 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 switch unit is controlled to be 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 a radio frequency tag transceiver to perform radio frequency tag detection according to a second time interval, and acquiring target detection information of target access equipment; and controlling the full-bridge transmitter to perform foreign matter detection according to a first time interval under the condition that the target access equipment comprises 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 application belongs to the technical field of wireless charging, and particularly relates to a control method of a wireless charging device and the wireless charging device.
Background
Wireless charging, also known as inductive charging, non-contact charging, is a new charging technology that results from wireless power transfer technology. Wireless charging technology utilizes near field induction to transfer energy from a wireless charging device to a device to be charged, which uses the received energy to charge a battery and to provide energy for the operation of the device itself. Because the wireless charger and the charging equipment are coupled through inductance to transmit energy, no wire connection is needed, and the non-conductive contact can be exposed.
At present, when the wireless charging transmitting terminal transmits power at any stage, radio frequency tags (NFC/RFID) in a transmitting range can be possibly damaged, the QI protocol prescribes that before the wireless charging transmitting terminal transmits power, radio frequency tag detection is required to be carried out regularly to judge whether radio frequency tags are connected or not, and when the wireless charging transmitting terminal transmits power at any stage, radio frequency tag detection is required to be carried out regularly, so that electric quantity consumption of the wireless charging transmitting terminal can be increased, and in some mobile power supplies with wireless charging functions, the electric quantity consumption of the mobile power supplies is increased, and the electric quantity consumption of the mobile power supplies is possibly too large to enable charging work.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a control method of a wireless charging device and the wireless charging device, and the power consumption of the wireless charging device is reduced.
In a first aspect, the present application provides a control method of a wireless charging device, where the wireless charging device includes a radio frequency tag detection system, where 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, where the first control unit is connected to the full-bridge transmitter, the second control unit, and the switch unit, and the radio frequency tag transceiver is connected to the second control unit and the switch unit, respectively, 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 perform foreign matter detection according to a first time interval to obtain foreign matter detection information;
controlling the switch unit to be switched to a conducting state 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, and conducting the power supply of the second control unit and the radio frequency tag transceiver;
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 a radio frequency tag based on the target detection information, controlling the full-bridge transmitter to detect the foreign matter according to the first time interval, and acquiring the foreign matter detection information.
According to the control method of the wireless charging device, when the foreign matter detection is executed in the standby mode and the equipment access exists in the power transmission range, the power supplies of the second control unit and the radio frequency tag transceiver are conducted, the radio frequency tag detection is executed, and therefore the electric quantity consumption of the wireless charging device can be effectively reduced.
According to one embodiment of the present application, the obtaining the 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 received, controlling the switch unit to switch to an off state, and cutting off the power supply of the second control unit and the radio frequency tag transceiver.
According to one embodiment of the present application, after the obtaining the target detection information of the target access device, the method further includes:
Controlling the full-bridge transmitter to establish communication connection with the target access equipment under the condition that the target access equipment does not comprise 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 switch to a transmitting power mode to charge the target access equipment.
According to one embodiment of the application, after said controlling said full-bridge transmitter to establish a communication connection with said target access device, said method further comprises:
and under the condition that the communication connection between the wireless charging device and the target access equipment is not successfully established, determining that the target access equipment is a metal foreign matter.
According to one embodiment of the present application, the determining, based on the foreign object detection information, that a target access device exists in a power transmission range of the wireless charging apparatus includes:
determining that a first access device exists in a power transmission range of the wireless charging device under the condition that the foreign matter detection information is smaller than a first detection threshold value;
and under the condition that the foreign matter detection information is larger than or equal to a second detection threshold value, determining the first access equipment as the target access equipment, wherein the second detection threshold value is smaller than the first detection threshold value.
According to one embodiment of the application, after said determining that there is a first access device within a power transmission range of the wireless charging apparatus, the method further comprises:
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 a metal foreign matter.
According to one embodiment of the present application, the method further comprises:
controlling the second control unit to drive the radio frequency tag transceiver to perform radio frequency tag detection according to a third time interval under the condition that the wireless charging device is in a transmitting power mode;
and under the condition that the radio frequency tag is connected in the power transmission range of the wireless charging device, stopping transmitting power, and controlling the full-bridge transmitter to detect the foreign matters 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 of radio frequency tag detection performed by the Ping phase, the configuration phase, and the negotiation phase is a fifth time interval, and a time interval of radio frequency tag detection performed by the calibration phase and the power transmission phase 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 device, the device 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, when the foreign matter detection is performed in the standby mode and the equipment access exists in the power transmission range, the power supply of the second control unit and the radio frequency tag transceiver is conducted, the radio frequency tag detection is performed, and therefore the electric quantity consumption of the wireless charging device can be effectively reduced.
According to one embodiment of the present application, further comprising:
the wireless transmitting chip is integrated with 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 resonance capacitor and a resonance coil are connected between the first capacitor and the second capacitor, the full-bridge transmitter comprises the first capacitor, the second capacitor, the resonance capacitor and the resonance 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 resonance capacitor and the resonance 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 transceiver circuit, the radio frequency transceiver circuit is connected with the radio frequency antenna, and the radio frequency tag transceiver comprises the radio frequency transceiver circuit and the radio frequency antenna.
In a third aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the method for controlling a wireless charging device according to the first aspect when the processor executes 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 a method of controlling a wireless charging device 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 a method of controlling a wireless charging device as described in the first aspect above.
Additional aspects and advantages of the 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 application.
Drawings
The foregoing 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, wherein:
fig. 1 is a schematic flow chart of a control method of a wireless charging device according to an embodiment of the present application;
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 the wireless charging device according to the embodiment of the present application;
fig. 4 is a second flowchart of a control method of the wireless charging device according to the embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to 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 switching unit 250.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The control method of the wireless charging device, the electronic device and the readable storage medium provided by the embodiment of the application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenes 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 connected in or not, 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, and the radio frequency tag transceiver 240 is connected to the second control unit 230 and the switch unit 250.
The first control unit 210 may communicate with the wireless charging reception device, control the full-bridge transmitter 220 to perform analog ping, foreign matter detection, transmission power, etc., and may also control the on-off of the switching unit 250 and communicate with the second control unit 230.
The radio frequency tag transceiver 240 may detect the radio frequency tag and transmit and receive data to and from the radio frequency tag, and the second control unit 230 may control the radio frequency tag transceiver 240 to detect and communicate the radio frequency tag (e.g., NFC, RFID, etc.), process detection information of the radio frequency 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 can 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 radio frequency tag transceiver 240 is cut off, and the second control unit 230 and the radio frequency tag transceiver 240 cannot operate, and no power consumption is generated.
The control method of the wireless charging device provided in the embodiment of the present application may be applied to the first control unit 210 in the wireless charging device.
As shown in fig. 1, the control method of the wireless charging device includes: steps 110 to 140.
In step 110, when the wireless charging device is in the standby mode, the full-bridge transmitter 220 is controlled to perform the foreign object detection at the first time interval, so as to obtain the foreign object detection information.
When the wireless charging device is in the standby mode, the first control unit 210 controls the full-bridge transmitter 220 to continuously perform the foreign object detection at the first time interval, and obtains the foreign object detection information to determine whether there is an access device in the power transmission range of the wireless charging device, and whether the access device belongs to the wireless charging receiving device or an external metal foreign object.
In actual implementation, the first control unit 210 controls the full-bridge transmitter 220 to continuously perform the foreign object detection at the first time interval, and the foreign object detection may be an analog ping, Q value detection, or the like.
In step 120, in the case 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, the control switch unit 250 is switched to the on state, and the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on.
In this step, based on the foreign matter detection information, it is determined that the target access device exists in the power transmission range of the wireless charging apparatus, and the first control unit 210 controls the switching unit 250 to be switched to the on state, turning on the power sources of the second control unit 230 and the radio frequency tag transceiver 240.
In step 130, the second control unit 230 is controlled to drive the radio frequency tag transceiver 240 to perform radio frequency tag detection according to the second time interval, so as to obtain the target detection information of the target access device.
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 for multiple times according to the second time interval, 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 a conductive state, and turns on the power supply of the second control unit 230 and the radio frequency tag transceiver 240, the first control unit 210 informs the second control unit 230 to perform radio frequency tag detection, and the second control unit 230 controls the radio frequency tag transceiver 240 to perform radio frequency tag detection according to the second time interval.
In step 140, in the case that the target access device includes the radio frequency tag based on the target detection information, the full-bridge transmitter 220 is controlled to perform the foreign object detection at the first time interval, so as to obtain the foreign object detection information.
In this step, when it is determined that the target access device includes the radio frequency tag according to the target detection information of the target access device, no further processing is required for the target access device, and the full-bridge transmitter 220 is continuously controlled to perform foreign object detection at the first time interval, so as to obtain corresponding foreign object detection information.
The target detection information is used for judging whether target access equipment in the power transmission range of the wireless charging device contains a radio frequency tag or not.
In practical 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, etc. clamped in a mobile phone shell of the mobile phone.
In the related art, before transmitting power, the wireless charging transmitting terminal periodically detects the radio frequency tag to determine whether the radio frequency tag is connected, which results in the increase of the electric quantity consumption of the wireless charging transmitting terminal.
In this embodiment of the present application, the wireless charging device is in a standby mode, only when it is determined that the device is in the power transmission range, the radio frequency tag detection is performed, whether the access device includes a radio frequency tag is determined, the normal idle condition is entered, only the foreign matter detection is performed, the combination of the foreign matter detection and the radio frequency tag detection is performed, 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, so that the power consumption is lower compared with the power consumption of the wireless charging device, 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, when the foreign matter detection is performed in the standby mode and the equipment access exists in the power transmission range, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and the radio frequency tag detection is performed, so that the electric quantity consumption of the wireless charging device can be effectively reduced.
In some embodiments, step 130, obtaining target detection information of the target access device includes:
in case 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 an off state, and 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 a conductive 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 radio frequency tag detection, and the second control unit 230 controls the radio frequency tag transceiver 240 to perform radio frequency tag detection according to a second time interval.
After the detection of the radio frequency tag transceiver 240 is finished, the second control unit 230 receives the target detection information of the radio frequency tag transceiver 240 and feeds back the target detection information 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 radio frequency tag transceiver 240.
In this embodiment, only when the second control unit 230 and the radio frequency tag transceiver 240 perform radio frequency tag detection, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and after the radio frequency tag is finished, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are immediately turned off, so as to further reduce the power consumption of the wireless charging device.
In some embodiments, after the target detection information of the target access device is acquired in step 130, the control method of the wireless charging apparatus may further include:
in the case that the target access device is determined not to include the radio frequency tag based on the target detection information, controlling the full-bridge transmitter 220 to establish a communication connection with the target access device;
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 switch to a transmitting power mode to charge the target access equipment.
In this embodiment, when it is determined 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 digital ping in an attempt to establish a communication connection with the 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, the target access device is determined to be a metallic foreign object in the event that the establishment of the communication connection between the wireless charging apparatus and the target access device is unsuccessful.
In this embodiment, when the communication connection between the wireless charging apparatus and the target access device is not successfully established, the target access device is determined to be an external metallic foreign object, and the first control unit 210 continues to control the full-bridge transmitter 220 to perform foreign object detection at the first time interval.
In some embodiments, step 120 of determining that a target access device exists within a power transmission range of the wireless charging apparatus based on the foreign object detection information may include:
determining that a first access device exists in the power transmission range of the wireless charging device under the condition that the foreign matter detection information is smaller than a first detection threshold value;
and determining the first access device as the target access device under the condition that the foreign matter detection information is greater than or equal to the second detection threshold value.
Wherein the second detection threshold is smaller 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 in the power transmission range of the wireless charging apparatus.
And when the foreign matter detection information is smaller than the first detection threshold value, judging that the 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 primarily screened through the second detection threshold, when the foreign object detection information is greater than or equal to the second detection threshold, the possibility that the first access device is the external metal foreign object is judged to be smaller, a radio frequency tag may exist in the first access device, the first access device is determined to be a target access device, and radio frequency tag detection is 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 control method of the wireless charging apparatus may further include:
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 or not, 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 there is a device access in 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 metallic foreign object.
In some embodiments, the control method of the wireless charging device may further include:
in the case that the wireless charging device is in the transmitting power mode, the second control unit 230 is controlled to drive the radio frequency tag transceiver 240 to perform radio frequency tag detection according to the third time interval;
and stopping transmitting power and controlling the full-bridge transmitter 220 to perform foreign matter detection according to the fourth time interval under the condition that the radio frequency tag is connected in the power transmitting range of the wireless charging device.
The wireless charging device is in a transmitting 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 connected in a power transmitting range of the wireless charging device.
When the radio frequency tag is determined to be accessed in the power transmission range of the wireless charging device, stopping transmitting power, and avoiding damaging the radio frequency tag in the power transmission range; and when the fact that the radio frequency tag is not 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 connected in 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 foreign matter 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 performed in the transmission power mode and 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, and turns on the power supply of the second control unit 230 and the radio frequency tag transceiver 240, and the power supply is turned off in the rest of the 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 transfer phase.
The time interval of radio frequency label detection in the Ping stage, the configuration stage and the negotiation stage is a fifth time interval, the time interval of radio frequency label detection 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 matter detection at a first time interval.
And comparing the detected result with a first detection threshold value and a second detection threshold value according to the detected result of the foreign matter detection, and judging that equipment is accessed in the power transmission range when the detected result is smaller than the first detection threshold value and larger than the second detection threshold value.
The first control unit 210 controls the second control unit 230 to perform n times of NFC/RFID detection, i.e., radio frequency tag detection, at a second time interval to determine whether the access device contains an NFC/RFID tag.
When the access device is judged not to contain the NFC/RFID tag, the full-bridge transmitter 220 is controlled to conduct digital ping, communication is established with the access device, and after the communication is established successfully, the power transmission mode is entered to charge the access device.
And in the power transmission mode, continuously detecting NFC/RFID at a third time interval, judging whether the NFC/RFID tag is contained, stopping transmitting power when judging that the NFC/RFID tag exists, and returning to foreign matter detection.
It should be noted that, 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 needs, which is not limited in the embodiment of the present application.
In this embodiment, when the foreign object detection is performed in the standby mode, the power consumption of the wireless charging device can be effectively reduced, the radio frequency tag detection is performed in the transmitting 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, the power supplies are turned off in the rest of the time, 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 tag detection system and a charging control system.
The charging control system is connected with the radio frequency tag detection system and is 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 respectively connected with the full-bridge transmitter 220, the second control unit 230, and the switch unit 250, and the radio frequency tag transceiver 240 is respectively connected with the second control unit 230 and the switch unit 250.
In this embodiment, the first control unit 210 may be used to perform the control method of the wireless charging device described above.
According to the wireless charging device provided by the embodiment of the application, when the foreign matter detection is performed in the standby mode and the equipment access exists in the power transmission range, the power supplies of the second control unit 230 and the radio frequency tag transceiver 240 are turned on, and the radio frequency tag detection is performed, so that the electric quantity consumption of the wireless charging device can be effectively reduced.
The radio frequency tag detection is performed 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, and 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 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 a first control unit 210 and a full-bridge inverter circuit, a first end of the wireless transmitting chip is connected with a first capacitor (shown as C1), a second end of the wireless transmitting chip is connected with 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 the full-bridge transmitter 220.
In this embodiment, the foreign matter detection work may be completed by the first control unit 210 and the detection resistor.
The third terminal 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 resonance capacitor and the resonance coil, and the detection resistor is used for performing foreign matter detection, wherein VIN and VDD represent voltage access of a radio frequency tag detection system of the wireless charging device.
The wireless radio frequency chip (illustrated as U2) integrates a second control unit 230 and a radio frequency transceiver circuit connected to a radio frequency antenna (illustrated as RF 1), and the radio frequency tag transceiver 240 includes the radio frequency transceiver circuit and the radio frequency antenna.
As shown in fig. 3, the switching unit 250 may include a PMOS transistor (illustrated as Q1) and an NMOS transistor (illustrated as Q2), through which the power on/off of the second control unit 230 and the radio frequency tag transceiver 240 is implemented.
Specific embodiments of the operation of the wireless charging device are 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 for determining whether the access device belongs to the wireless charging receiving device or to the external metallic foreign object.
If the detected Q value is lower than a first detection threshold (e.g., the first detection threshold is 20), then the device is considered to be connected, otherwise, the Q value detection is continued.
If the measured Q value is lower than the second detection threshold (for example, the first detection threshold is 10), the access device is considered to be an external metal foreign object, the radio frequency tag detection is not performed on the access device, and the Q value detection is continuously performed for 300ms at intervals 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 for 3 times at a second time interval (e.g., 300 ms), to determine whether the access device includes 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 the gate end of the NMOS tube, the NMOS tube is controlled to be opened, the PMOS tube is opened when the NMOS tube is opened, the VDD is conducted to the 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 tag detection action is finished, the radio frequency chip processes the received detection information and feeds the detection information back to the radio transmitting chip, the radio transmitting chip outputs a low level to the gate end of the NMOS tube, the NMOS tube is controlled to be closed, and when the NMOS tube is closed, the PMOS tube is closed, and the power input of the radio frequency chip is cut off.
When the radio frequency tag detection is performed and it is determined that the access device does not include the NFC tag, 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 recognizing that the access device is a wireless charging receiving device, the radio frequency tag detection is continuously performed at a fifth time interval (e.g., 300 ms) when the access device is in a Ping phase, a configuration phase and a negotiation phase, and the radio frequency tag detection is continuously performed at a sixth time interval (e.g., 50 ms) when the access device is in a calibration phase and a power transmission phase.
And carrying out radio frequency tag detection, judging whether a radio frequency tag is connected to a transmitting range, stopping transmitting power if the radio frequency tag is connected to the transmitting range, and continuously carrying out Q value detection at a first time interval, otherwise, continuously carrying out radio frequency tag detection.
In some embodiments, as shown in fig. 5, the embodiment of the present application further provides an electronic device 500, including 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 program when executed by the processor 501 implements the respective processes of the above-mentioned method embodiment for controlling a wireless charging device, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein.
The electronic device in the embodiment of the 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, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned embodiment of the control method of the wireless charging device, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application also provides a computer program product, which comprises a computer program, and the computer program realizes the control method of the wireless charging device when being executed by a processor.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running a program or an instruction, so as to implement each process of the control method embodiment of the wireless charging device, and achieve the same technical effect, so that repetition is avoided, and no further description is provided here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., 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 present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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: many changes, modifications, substitutions and variations may 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 (9)
1. A control method of a wireless charging device, wherein the wireless charging device comprises a radio frequency tag detection system, 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, 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, the method is applied to the first control unit, and the method comprises:
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 obtain foreign matter detection information;
controlling the switch unit to be switched to a conducting state 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, and conducting the power supply of the second control unit and the radio frequency tag transceiver;
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;
controlling the full-bridge transmitter to perform foreign matter detection according to the first time interval under the condition that the target access equipment comprises a radio frequency tag based on the target detection information, and acquiring the foreign matter detection information;
the determining, based on the foreign object detection information, that a target access device exists in a power transmission range of the wireless charging device includes:
determining that a first access device exists in a power transmission range of the wireless charging device under the condition that the foreign matter detection information is smaller than a first detection threshold value;
And under the condition that the foreign matter detection information is larger than or equal to a second detection threshold value, determining the first access equipment as the target access equipment, wherein the second detection threshold value is smaller than the first detection threshold value.
2. The method for controlling a wireless charging apparatus according to claim 1, wherein the acquiring the 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 received, controlling the switch unit to switch to an off state, and cutting off the power supply of the second control unit and the radio frequency tag transceiver.
3. The control method of the wireless charging apparatus according to claim 1, wherein after the acquisition of the target detection information of the target access device, the method further comprises:
controlling the full-bridge transmitter to establish communication connection with the target access equipment under the condition that the target access equipment does not comprise 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 switch to a transmitting power mode to charge the target access equipment.
4. A control method of a wireless charging apparatus according to claim 3, wherein after said controlling the full-bridge transmitter to establish a communication connection with the target access device, the method further comprises:
and under the condition that the communication connection between the wireless charging device and the target access equipment is not successfully established, determining that the target access equipment is a metal foreign matter.
5. The method of controlling a wireless charging apparatus according to claim 1, wherein after said determining that a first access device exists within a power transmission range of the wireless charging apparatus, the method further comprises:
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 a metal foreign matter.
6. The control method of a wireless charging device according to any one of claims 1 to 5, characterized in that the method further comprises:
controlling the second control unit to drive the radio frequency tag transceiver to perform radio frequency tag detection according to a third time interval under the condition that the wireless charging device is in a transmitting power mode;
and under the condition that the radio frequency tag is connected in the power transmission range of the wireless charging device, stopping transmitting power, and controlling the full-bridge transmitter to detect the foreign matters according to a fourth time interval.
7. The method according to claim 6, wherein the transmission power mode includes a Ping phase, a configuration phase, a negotiation phase, a calibration phase, and a power transmission phase, and the intervals of radio frequency tag detection performed by the Ping phase, the configuration phase, and the negotiation phase are a fifth interval, and the intervals of radio frequency tag detection performed by the calibration phase and the power transmission phase are a sixth interval, and the sixth interval is smaller than the fifth interval.
8. A wireless charging device, 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 according to any one of claims 1-7;
and the charging control system is connected with the radio frequency tag detection system and is used for charging the target access equipment.
9. The wireless charging device of claim 8, further comprising:
the wireless transmitting chip is integrated with 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 resonance capacitor and a resonance coil are connected between the first capacitor and the second capacitor, the full-bridge transmitter comprises the first capacitor, the second capacitor, the resonance capacitor and the resonance 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 resonance capacitor and the resonance 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 transceiver circuit, the radio frequency transceiver circuit is connected with the radio frequency antenna, and the radio frequency tag transceiver comprises the radio frequency transceiver circuit and the radio frequency antenna.
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| US10833539B2 (en) * | 2017-09-27 | 2020-11-10 | Wits Co., Ltd. | Mobile terminal, communications module and control method of mobile terminal |
| CN208226683U (en) * | 2018-03-20 | 2018-12-11 | 北京弗圣威尔科技有限公司 | It can carry out the mechanism of wireless charging and heating and the device with wireless charging and heating function |
| KR102622769B1 (en) * | 2019-04-29 | 2024-01-10 | 엘지전자 주식회사 | Wireless power reception device, wireless power transmission device, and wireless power transmission method using the same |
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