CN111490579B - Wireless charging method, foreign matter detection method, device, base and storage medium - Google Patents

Wireless charging method, foreign matter detection method, device, base and storage medium Download PDF

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Publication number
CN111490579B
CN111490579B CN202010584838.5A CN202010584838A CN111490579B CN 111490579 B CN111490579 B CN 111490579B CN 202010584838 A CN202010584838 A CN 202010584838A CN 111490579 B CN111490579 B CN 111490579B
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current value
working
wireless
preset
wireless charging
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CN111490579A (en
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黄拔梓
黄道臣
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Shenzhen Lebond Technology Co ltd
Dongguan Lebond Electronic Technology Co Ltd
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Shenzhen Libode Technology Co ltd
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Priority to PCT/CN2021/098553 priority patent/WO2021259048A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

The application is applicable to the technical field of wireless charging, and provides a wireless charging method, a wireless charging device, a wireless charging base, a personal care appliance and a computer storage medium, wherein whether the working current value of a wireless transmitting module is within a preset current value range is judged by acquiring the working current value of the wireless transmitting module; if the working current value of the wireless transmitting module is within the preset current value range, the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies is obtained, a working current value sequence is generated, the working current value sequence is matched with the preset current value sequence, if the working current value sequence is matched with the preset current value sequence in a consistent manner, the wireless transmitting module is driven to alternately work under at least two working voltages, and the problems that the temperature is too high and the detection accuracy of wireless charging foreign matters is low due to the fact that heat is easily generated in the quick charging process of the existing wireless charging circuit are solved.

Description

Wireless charging method, foreign matter detection method, device, base and storage medium
Technical Field
The present application belongs to the field of wireless charging technologies, and in particular, to a wireless charging method, a wireless charging foreign object detection method, a wireless charging device, a wireless charging base, a personal care appliance, and a computer storage medium.
Background
With the improvement of life quality of people, various consumer electronics products emerge endlessly, the traditional contact wired charging technology is more and more difficult to meet the requirements of people, and the wireless charging technology has the advantages of no need of wire connection, no conductive contact exposed on a charger and an electric device, convenience in charging and the like, and is widely applied to electronic products. The current wireless charging technology is mainly based on near-field induction, a charger for wireless charging transmits energy to electric equipment in a preset charging area range, the electric equipment charges a battery by using the received energy and is simultaneously used by the electric equipment, the principle of energy transmission is to arrange a coil in the charger and generate an alternating current electromagnetic field through alternating current, and one end of the electric equipment is provided with another coil to receive the alternating current electromagnetic field and convert the alternating current electromagnetic field into electric energy to be stored in the battery of the electric equipment, so the wireless charging technology can really improve the convenience of charging the electric equipment.
The foreign matter identification technology of wireless charging has been highly concerned by those skilled in the art, and especially when there is a metal foreign matter invading the range of the charging area, the accuracy of foreign matter identification is low, which often causes equipment damage, especially in the process of rapid charging, because of the high temperature generated by the metal foreign matter, the danger is caused. Moreover, when pursuing charging efficiency, the person skilled in the art often faces the problem of too high temperature of the charging device caused by the wireless quick charging technology.
Disclosure of Invention
In view of this, embodiments of the present application provide a wireless charging method, a wireless charging device, a wireless charging base, a personal care appliance, and a computer storage medium, which are used to solve the problems of excessive temperature and low accuracy of detecting a wireless charging foreign object due to easy heat generation in a fast charging process of a conventional wireless charging circuit.
A first aspect of an embodiment of the present application provides a wireless charging method, which is applied to a wireless charging base, where the wireless charging base includes a wireless transmitting module for transmitting a wireless charging signal, and the wireless charging method includes:
acquiring a working current value of the wireless transmitting module;
judging whether the working current value of the wireless transmitting module is within a preset current value range or not; if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence;
and matching the working current value sequence with a preset current value sequence, and if the working current value sequence is matched with the preset current value sequence in a consistent manner, driving the wireless transmitting module to alternately work under at least two working voltages.
Optionally, if the working current value sequence matches with the preset current value sequence consistently, the method includes:
and judging whether the wireless transmitting frequency corresponding to the maximum current value in the working current value array is positioned in a preset frequency threshold interval, if so, judging that the working current value array is matched with the preset current value array consistently.
Optionally, if the working current value sequence matches with the preset current value sequence consistently, the method includes:
judging whether the working current value i0 corresponding to the preset transmitting frequency F0 is the maximum current value in the working current sequence, if so, judging that the working current value sequence is matched with the preset current value sequence; wherein the plurality of preset wireless transmission frequencies includes the preset transmission frequency F0.
Optionally, the preset current value range includes a first current threshold, and the first current threshold is a lower limit value of the preset current value range, and if the working current value is smaller than the first current threshold, it is determined that the wireless charging base is in an idle state.
Optionally, the preset current value range includes a second current threshold, the second current threshold is an upper limit value of the preset current value range, and if the working current value is greater than the second current threshold, it is determined that the wireless charging base is in a foreign matter state.
Optionally, if the working current value array is inconsistent with the preset current value array in matching, it is determined that the wireless charging base is in a foreign matter state.
Optionally, the wireless charging method further includes a foreign object processing and determining step, where the foreign object processing and determining step includes:
acquiring a working current value of the wireless transmitting module;
comparing the working current value with a preset foreign matter treatment current value;
if the working current value is smaller than the foreign matter treatment current value, judging that the wireless charging base is in an idle state;
and if the working current value is not less than the foreign matter treatment current value, judging that the wireless charging base is still in a foreign matter state.
Optionally, when the wireless charging base is in a foreign object state, the foreign object processing determining step is performed once at preset time intervals T1.
Optionally, the driving the wireless transmitting module to alternately operate at least two operating voltages includes:
driving the wireless transmission module to alternately work at a first working voltage and a second working voltage in each working period T;
the duration of the first working voltage in the working period T is TA, the ratio of TA to the working period T is a first ratio, and the value range of the first ratio is [0.1, 0.9 ].
Optionally, the wireless charging method further includes a fast charging adjustment step, where the fast charging adjustment step includes:
comparing the working current value with a quick charge regulation range value;
when the working current value is smaller than the lower limit value of the quick charge regulation range value, increasing the first ratio; and when the working current value is larger than the upper limit value of the quick charge regulation range value, reducing the first ratio.
Optionally, the wireless charging method further includes a full charge detection step, where the full charge detection step includes:
switching the wireless transmitting frequency of the wireless transmitting module to be full of detecting frequency;
acquiring a full detection current value of the wireless transmitting module under the full detection frequency;
and comparing the full-filling detection current value with a preset full-filling reference value, and judging that the current is full when the full-filling detection current value is smaller than the full-filling reference value.
Optionally, the full detection step is performed at preset time intervals T2.
The second aspect of the embodiments of the present application further provides a wireless charging foreign object detection method, which is applied to a wireless charging base, where the wireless charging base includes a wireless transmitting module, and the wireless charging foreign object detection method includes the following steps:
acquiring a working current value of the wireless transmitting module;
judging whether the working current value of the wireless transmitting module is within a preset current value range or not; if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence;
sequentially subtracting the latter item from the former item in the working current value sequence to obtain a plurality of current difference values;
and if a positive number appears after a negative number appears in the plurality of current difference values, determining that the object on the wireless charging base is a pre-charging device.
Optionally, the wireless charging foreign object detection method further includes determining that the wireless charging base is in a foreign object state if each of the plurality of current difference values is a positive number or a negative number.
A third aspect of the embodiments of the present application provides a wireless charging device, including a control module, where the control module is configured to send a control signal, and the wireless charging device further includes:
the wireless transmitting module is used for transmitting a wireless charging signal;
the frequency adjusting module is used for adjusting the wireless transmitting frequency of the wireless transmitting module;
the voltage adjusting module is used for adjusting the working voltage of the wireless transmitting module so as to perform quick charging adjustment;
the current detection module is used for acquiring the working current value of the wireless transmission module; the wireless transmission device is also used for generating a working current value array under a plurality of preset wireless transmission frequencies according to the control signal and matching the working current value array with a preset current value array; and the controller is also used for carrying out foreign matter treatment judgment and full detection according to the control signal.
A fourth aspect of an embodiment of the present application provides a wireless charging base, including: the wireless charging system comprises a wireless transmitting module, a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the wireless transmitting module is used for transmitting a wireless charging signal, and the processor executes the computer program to realize the steps of the wireless charging method.
A fifth aspect of embodiments of the present application provides a personal care appliance comprising a wireless receiving module, and a wireless charging base as described above;
the wireless receiving module is used for receiving a wireless charging signal transmitted by a wireless transmitting module of the wireless charging base.
A sixth aspect of embodiments of the present application provides a computer storage medium storing a computer program that, when executed by a processor, implements the steps of the wireless charging method described above.
The embodiment of the application provides a wireless charging method, a wireless charging foreign matter detection method, a wireless charging device, a wireless charging base, a personal care appliance and a computer storage medium, wherein whether the working current value of a wireless transmitting module is within a preset current value range is judged by acquiring the working current value of the wireless transmitting module; if the working current value of the wireless transmitting module is within the preset current value range, the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies is obtained, a working current value sequence is generated, the working current value sequence is matched with the preset current value sequence, if the working current value sequence is matched with the preset current value sequence in a consistent manner, the wireless transmitting module is driven to alternately work under at least two working voltages, and the problems that the temperature is too high and the detection accuracy of wireless charging foreign matters is low due to the fact that heat is easily generated in the quick charging process of the existing wireless charging circuit are solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flowchart of an implementation of a wireless charging method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating a working current value sequence and a preset current value sequence provided in an embodiment of the present application;
FIG. 3 is a schematic flow chart of an implementation of the foreign object processing determination step provided in the embodiment of the present application;
FIG. 4 is a schematic flow chart of an implementation of the fast charge adjustment step provided in the embodiment of the present application;
FIG. 5 is a schematic flow chart of an implementation of the fullness detecting step provided by the embodiment of the present application;
fig. 6 is a schematic structural diagram of a wireless charging device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a wireless charging base according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the present application provides a wireless charging method, which is applied to a wireless charging base, where the wireless charging base includes a wireless transmitting module for transmitting a wireless charging signal, fig. 1 is a schematic view of an implementation flow of the wireless charging method provided in the embodiment of the present application, and referring to fig. 1, the wireless charging method may include steps 10 to 30.
And step 10, obtaining the working current value of the wireless transmitting module.
In this embodiment, after the wireless charging base is started, the working current value of the wireless transmitting module is obtained.
In one embodiment, because the wireless transmitting module mainly comprises inductance coils, the wireless receiving module in the preset charging device also comprises inductance coils, when the two inductance coils are close to each other, the magnetic field change of one inductance coil will affect the magnetic field of the other inductance coil, namely, the two inductance coils generate mutual inductance phenomenon in the working process, the size of the mutual inductance depends on the degree of coupling between the self-inductance of the inductance coils and the two inductance coils, and therefore, different charging devices have unique inductance coils. In this embodiment, since the wireless transmitting module and the preset charging device both have their unique inductance coils, after the wireless charging base is started, the working current value of the wireless transmitting module at the preset starting detection frequency is obtained, so as to determine whether there is a foreign object on the wireless charging base based on the working current value of the wireless transmitting module at the preset starting detection frequency.
Step 20, judging whether the working current value of the wireless transmitting module is within a preset current value range; and if the working current value of the wireless transmitting module is within the preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence.
In the embodiment of the application, since the metal objects have specific inductance characteristics, for example, mutual inductance coefficients of a resistor, a capacitor and an inductor when the metal objects are close to an inductance coil in a wireless transmission module are not only different, but also have larger difference, further, a metal structure and a circuit structure in the preset charging device have larger influence on the inductance characteristics, and therefore, for the preset charging device, the charging devices of different models have specific working current values under the preset starting detection frequency. Therefore, in the present embodiment, whether there is a foreign object on the wireless charging base can be determined by the operating current value.
In this embodiment, the wireless transmitting module is used for transmitting a wireless charging signal, and determines whether the acquired working current value is within a preset current value range by acquiring the working current value of the wireless transmitting module, so as to determine whether a foreign object exists on the wireless charging base. The preset current value range in the present embodiment may be a current value range that is determined by a user in advance according to a foreign object detection situation, for example, the lower limit value (i.e. the first current threshold value) of the preset current value range is used for determining whether a metal object exists on the wireless charging base, if the working current value is smaller than the lower limit value, then judging that no object exists, at the moment, the wireless charging base is in an idle state, if the working current value is larger than or equal to the lower limit value, it is determined that there is a metal object, the upper limit value of the preset current value range (i.e., the second current threshold value) is used to determine whether it is the preset charging device, and if the operating current value is greater than the upper limit value, judging that the object on the wireless charging base is not the preset charging equipment, if the working current value is less than or equal to the upper limit value, it is determined that the object on the wireless charging base is a preset charging device or a metal object similar to the preset charging device.
In this embodiment, if the working current value of the wireless transmitting module is within the preset current value range, it indicates that the object on the wireless charging base is the preset charging device or a metal object similar to the preset charging device, and therefore, in order to determine whether the object is the preset charging device, a working current value series is generated by collecting the working current values of the wireless transmitting module at a plurality of preset wireless transmitting frequencies and based on the plurality of working current values, so as to further determine whether the object on the wireless charging base is the preset charging device.
And step 30, matching the working current value sequence with a preset current value sequence, and if the working current value sequence is consistent with the preset current value sequence in matching, driving the wireless transmitting module to alternately work under at least two working voltages.
Specifically, because wireless transmitting module mainly comprises inductance coils, predetermine wireless receiving module in the battery charging outfit and also comprises inductance coils, two sets of inductance coils are when being close to each other, and the magnetic field change of an inductance coil will influence the magnetic field of another inductance coil, and two sets of inductance coils take place mutual induction phenomenon in the course of the work promptly, and mutual inductance's size depends on inductance coil's self-inductance and the degree of two inductance coil coupling, consequently, different battery charging outfit have its unique inductance coil. In this embodiment, since the wireless transmitting module and the preset charging device both have their unique inductance coils, the working current value of the wireless transmitting module at a plurality of wireless transmitting frequencies is collected to generate a working current value sequence, and based on the working current value sequence, it can be identified whether the object on the wireless charging base is the preset charging device.
In this embodiment, if the working current value array matches consistently with the preset current value array, it indicates that the object on the wireless charging base is the preset charging device, and at this moment, the wireless charging base starts the charging mode to charge the preset charging device quickly.
In one embodiment, in step 30, if the working current value sequence matches the preset current value sequence, the method includes: and judging whether the wireless transmitting frequency corresponding to the maximum current value in the working current value array is positioned in a preset frequency threshold interval, if so, judging that the working current value array is matched with the preset current value array consistently.
In this embodiment, a plurality of working current values in the working current value sequence are in one-to-one correspondence with a plurality of preset wireless transmission frequencies, for example, the preset wireless transmission frequency is used as an abscissa, the working current value is a ordinate, the plurality of working current values in the working current value sequence are sequentially connected to form a waveform curve, if the wireless transmission frequency corresponding to the maximum current value in the working current value sequence is located in a preset frequency threshold interval, it is determined that the working current value sequence is consistent with the preset current value sequence in a matching manner, and at this time, the wireless transmission module can be controlled to enter a fast charging state, that is, the wireless transmission module is driven to alternately operate under at least two working voltages.
In one embodiment, referring to fig. 2, the plurality of preset wireless transmission frequencies include f1, f2, f3, f4 and f5, as shown in fig. 2, the operating current values collected under the preset wireless transmission frequencies F1, F2, F3, F4 and F5 are i1, i2, i3, i4 and i5 respectively, the operating current values i1, i2, i3, i4 and i5 are sequentially connected to form a waveform curve W1, W2 is a waveform curve formed by a preset current value sequence, the operating current value i3 is the maximum current value in the working current value sequence, the wireless transmission frequency corresponding to the operating current value i3 is F3, the preset frequency threshold interval is [ F1, F2], if F3 is located in the preset frequency threshold interval [ F1, F2], and judging that the working current value sequence is matched with the preset current value sequence uniformly, and if F3 is positioned outside a preset frequency threshold interval [ F1, F2], judging that the working current value sequence is not matched with the preset current value sequence uniformly.
In one embodiment, in step 30, if the working current value sequence matches the preset current value sequence, the method includes: judging whether the working current value i0 corresponding to the preset transmitting frequency F0 is the maximum current value in the working current sequence, if so, judging that the working current value sequence is matched with the preset current value sequence; wherein the plurality of preset wireless transmission frequencies includes the preset transmission frequency F0.
In this embodiment, a working current value of the wireless transmission frequency under a plurality of preset transmission frequencies is obtained, and a working current value sequence is generated, where the plurality of preset transmission frequencies include F0, a plurality of working current values in the working current value sequence correspond to the plurality of preset wireless transmission frequencies one to one, whether the working current value i0 corresponding to the preset transmission frequency F0 is a maximum current value in the working current value sequence is determined, if yes, it is determined that the working current value sequence matches the preset current value sequence consistently, and if not, it is determined that the working current value sequence matches the preset current value sequence inconsistently.
Specifically, in the preset current value sequence, the preset working current value corresponding to the wireless transmission frequency F0 is the maximum current value, and therefore, if the working current value sequence generated by the wireless transmission module under a plurality of preset wireless transmission frequencies matches with the preset current value sequence, the working current value i0 of the wireless transmission module under the wireless transmission frequency F0 reaches the maximum value, that is, when the wireless transmission frequency is less than F0, the corresponding working current value is less than i0, and when the wireless transmission frequency is greater than F0, the corresponding working current value is less than i 0.
In one embodiment, the upper frequency threshold F2 in the preset frequency threshold interval [ F1, F2] may be the same as the lower frequency threshold F1, and F2= F1= F0, at this time, it is determined whether the wireless transmission frequency corresponding to the maximum current value in the operating current sequence is F0, and if so, it is determined that the operating current value sequence matches the preset current value sequence.
In one embodiment, in step 20, the preset current value range includes a first current threshold, and the first current threshold is a lower limit of the preset current value range, and if the working current value is smaller than the first current threshold, it is determined that the wireless charging base is in an idle state.
In this embodiment, if the working current value of the wireless transmitting module is smaller than a preset first current threshold, and the first current threshold is a lower limit value of a preset current value range, it indicates that there is no metal object on the wireless charging base, that is, it can be determined that there is no object on the wireless charging base, and the wireless charging base is in an idle state.
Further, in an embodiment, if the working current of the wireless transmitting module is still smaller than the preset first current threshold after the preset time period, the wireless transmitting module may be controlled to stop working, so as to avoid energy consumption increase and electric energy waste caused by the wireless transmitting module always transmitting the wireless charging signal.
In one embodiment, in step 20, the preset current value range includes a second current threshold, and the second current threshold is an upper limit value of the preset current value range, and if the working current value is greater than the second current threshold, it is determined that the wireless charging base is in a foreign object state.
In this embodiment, if the working current value of the wireless transmitting module is greater than the preset second current threshold, and the second current threshold is the upper limit of the preset current value range, it may be determined that a foreign object exists on the wireless charging base, and the foreign object is neither the preset charging device nor a metal object similar to the preset charging device, and it may be directly determined that the object on the wireless charging base belongs to the foreign object.
In one embodiment, if the working current value sequence is not consistent with the preset current value sequence in a matching manner, it is determined that the wireless charging base is in a foreign matter state.
In the embodiment of the application, since the metal objects have specific inductance characteristics, for example, mutual inductance coefficients of a resistor, a capacitor and an inductor when the metal objects are close to an inductance coil in a wireless transmission module are not only different, but also have larger difference, further, a metal structure and a circuit structure in the preset charging device have larger influence on the inductance characteristics, and therefore, for the preset charging device, charging devices of different models have specific current value sequences. In this embodiment, the working current value sequence is matched with the preset current value sequence, and if the working current value sequence is not matched with the preset current value sequence, it is determined that the wireless charging base is in a foreign matter state.
In one embodiment, in step 30, matching the working current value sequence with a preset current value sequence, and if the working current value sequence is matched with the preset current value sequence, driving the wireless transmitting module to alternately operate under at least two working voltages includes:
if the characteristics of the working current value sequence are consistent with those of the preset current value sequence or the variation trends in the working current value sequence are matched with those of the preset current value sequence, it is judged that no foreign matter exists on the wireless charging base, and the wireless charging base enters a quick charging state.
In this embodiment, the operating current value sequence is matched with a preset current value sequence, for example, the plurality of preset wireless transmission frequencies include f1, f2 and f3, the operating current values collected at the plurality of preset wireless transmission frequencies are I1, I2 and I3, the preset current values are I1, I2 and I3, and if the operating current value sequence (I1, I2 and I3) is consistent with the preset current value sequence (I1, I2 and I3), it is determined that no foreign object exists on the wireless charging base.
In one embodiment, the working current value sequence and the preset current value sequence are matched and consistent, which may be that the current value curves in the working current value sequence have consistent variation trends, for example, the working current value sequence generated by the wireless transmitting module under a plurality of preset wireless transmitting frequencies has the same variation trend as the preset current value sequence, that is, the maximum working current value is reached under the same wireless transmitting frequency, and it is determined that the working current value sequence and the preset current value sequence are matched and consistent; if the preset current value array is a waveform curve and the working current value array is the same waveform curve, judging that the working current value array is matched with the preset current value array consistently; and if the preset current value sequence is a parabolic curve with a downward opening, and the working current value sequence is also in the same parabolic shape with the downward opening, judging that the working current value sequence is matched with the preset current value sequence.
In an embodiment, the matching of the working current value sequence and the preset current value sequence may be that the detected working current value sequence is the same as the preset current value sequence, or the matching is determined to be consistent when the similarity reaches a preset percentage, for example, the similarity reaches 80% or more.
In one embodiment, each charging device has a unique inductance characteristic, and therefore, by acquiring operating current values of the wireless transmitting module at a plurality of wireless transmitting frequencies, the plurality of wireless transmitting frequencies correspond to an operating current value sequence consisting of a plurality of operating current values, and the corresponding charging device is determined according to the operating current value sequence, for example, the operating current value sequence matches with a preset current value sequence, if the operating current value sequence matches with the preset current value sequence, it is determined that the charging device on the charging base is the preset charging device, and if the operating current value sequence does not match with the preset current value sequence, it is determined that the charging device on the charging base is a non-preset charging device, that is, a foreign object exists, and at this time, the wireless charging base is in a foreign object state.
In one embodiment, when the operating current value of the wireless transmitting module is detected to be within a preset operating current value range, it is indicated that an object, which may be a pre-charging device or a foreign object that is not a preset charging device, is placed on the wireless charging base, and at this time, it may be further determined whether the object on the wireless charging base is a pre-charging device or another foreign object by using the following wireless charging foreign object detection method, where the wireless charging foreign object detection method includes the following steps:
collecting working current values of a wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence; and subtracting the latter item from the former item in the working current value sequence to obtain a plurality of current difference values, if the obtained plurality of current difference values are all positive numbers or all negative numbers, the object on the wireless charging base is a foreign object, and if the obtained result shows that the negative number appears first and then the positive number appears, the object on the wireless charging base is the pre-charging equipment.
Specifically, for example, in a preferred embodiment, the plurality of preset wireless transmission frequencies include f1, f2, f3 and f4, and f1, f2, f3 and f4 are sequentially increased, and the number of the working current values collected at the plurality of preset wireless transmission frequencies is i1, i2, i3 and i 4; subtracting the latter term from the former term of the operating current value series i1, i2, i3, i4 to obtain three current difference values: i1-i2, i2-i3, i3-i 4; if all the three current difference values are positive numbers, the object on the wireless charging base is a foreign object, if the three obtained current difference values first show a negative number and then show a positive number, the object on the wireless charging base is a pre-charging device.
In another preferred embodiment, the plurality of preset wireless transmission frequencies include f1, f2, f3 and f4, wherein f1, f2, f3 and f4 are sequentially decreased, and the number of the working current values collected at the plurality of preset wireless transmission frequencies is i1, i2, i3 and i 4; subtracting the latter item from the former item of the working current value series i1, i2, i3 and i4 to obtain three current difference values, i1-i2, i2-i3 and i3-i 4; if all the obtained three current difference values are negative numbers, the object on the wireless charging base is a foreign matter, if the three obtained results show that the negative numbers appear first and then positive numbers appear, the object on the wireless charging base is the pre-charging equipment.
In one embodiment, the former item in the working current value sequence is subtracted from the latter item to obtain a plurality of current difference values, and if each of the obtained plurality of current difference values is a positive number or a negative number, it is determined that a foreign object exists on the wireless charging base, and the wireless charging base is in a foreign object state.
In one embodiment, if the wireless charging base is judged to have foreign matters, the power supply to the wireless transmitting module is turned off.
In this embodiment, after judging that there is the foreign matter on the wireless base that charges, can reach energy-conserving purpose through closing supplying power to wireless transmitting module, not only can avoid the power consumption of wireless transmitting module in abnormal working process, can also avoid wireless transmitting module to take place incident such as short circuit in abnormal working process.
Further, in an embodiment, if it is determined that there is a foreign object on the wireless charging base, the wireless transmission frequency of the wireless transmission module may be reduced, or the operating voltage of the wireless transmission module may be reduced.
In this embodiment, if it is determined that there is a foreign object on the wireless charging base, the wireless transmission frequency of the wireless transmission module may be reduced, or the operating voltage of the wireless transmission module may be reduced, so as to reduce the energy consumption of the wireless charging base in a non-charging phase, for example, the operating voltage of the wireless transmission module is reduced from a high voltage to a low voltage, or the operating voltage of the wireless transmission module is set to a preset voltage set to detect a foreign object state.
In one embodiment, after determining that the wireless charging base is in the foreign object state, a foreign object processing determining step is further included, specifically, referring to fig. 3, the foreign object processing determining step includes steps 41 to 43.
And step 41, acquiring a working current value of the wireless transmitting module.
And 42, comparing the working current value with a preset foreign matter treatment current value.
In this embodiment, the wireless charging base is in a foreign matter state, the power supply of the wireless transmitting module is turned off, and after the turning-off duration reaches the preset duration T1, the power supply of the wireless transmitting module is turned on, and the working current value of the wireless transmitting module is collected again.
In one embodiment, the steps of detecting the foreign object in steps 10, 20 and 30 may be performed again directly after the power supply to the wireless transmission module is turned off for a preset time period T1.
And 43, if the working current value is smaller than the foreign matter treatment current value, determining that the wireless charging base is in an idle state, and if the working current value is not smaller than the foreign matter treatment current value, determining that the wireless charging base is still in a foreign matter state.
In this embodiment, if the collected operating current value is greater than the foreign object treatment current value, it can be determined that there is a foreign object on the wireless charging base, and the wireless charging base is still in a foreign object state.
In one embodiment, when the wireless charging base is in the foreign object state, the foreign object processing determination is performed at preset time intervals T1.
In this embodiment, by comparing the operating current value collected at preset time interval T1 with the foreign matter treatment current value, it can be determined whether there is any foreign matter on the wireless charging base, and if the operating current value of the wireless transmitting module is smaller than the foreign matter treatment current value, it is determined that the foreign matter on the wireless charging base has been removed.
In this embodiment, if the collected working current value is smaller than the foreign object treatment current value, step 10, step 20, and step 30 are executed again after the preset time interval T3, to determine whether the charging device on the wireless charging base is the preset charging device, and if so, the wireless transmitting module is controlled to enter the fast charging mode to charge the preset charging device.
In one embodiment, in step 42, if the working current value is not less than the foreign object treatment current value, it is determined that the wireless charging base is still in the foreign object state, and the power supply to the wireless transmitting module is turned off again.
In one embodiment, in step 10, obtaining the operating current value of the wireless transmitting module specifically includes: and collecting the working current value of the wireless transmitting module at preset time intervals T4.
In this embodiment, the working current value of the wireless transmitting module is collected at preset time intervals T4, the working state of the wireless charging base can be detected in real time, for example, if the charging device is located on the wireless charging base and is in a normal power supply state, if other metal objects appear on the wireless charging base or magnetic impurities are doped, the charging device is abnormal in charging, at the moment, the working current value of the wireless transmitting module is collected at preset time intervals T4, whether the charging device is abnormal in the charging process can be detected, and the potential safety hazard is avoided.
In one embodiment, if there is a foreign object on the wireless charging base, that is, the wireless charging base is in a foreign object state, the user is reminded of the foreign object detection result through a flashing warning light signal or a voice playing signal. For example, if a foreign object is detected on the wireless charging base, a voice signal "foreign object is present on the wireless charging base" is played.
In one embodiment, step 30, driving the wireless transmitting module to alternately operate at least two operating voltages includes: driving the wireless transmission module to alternately work at a first working voltage and a second working voltage in each working period T; the duration of the first working voltage in the working period T is TA, the ratio of TA to T is a first ratio, and the value range of the first ratio is [0.1, 0.9 ].
In this embodiment, the wireless transmission module is driven to alternately operate at the first operating voltage and the second operating voltage in each operating period T, so that the temperature of the wireless charging base can be controlled within a preset temperature range, specifically, the duration of the first operating voltage in each operating period T is TA, the duration of the second operating voltage in each operating period T is TB, TA + TB = T, the ratio of TA to T is a first ratio, and the value range of the first ratio may be [0.1, 0.9 ].
In one embodiment, when the first ratio is 0.1, that is, the duration of the first operating voltage is one tenth of the entire operating period T, at this time, the charging current of the wireless transmitter module is 250mA, the charging temperature of the wireless transmitter module is about 40 °, that is, the temperature of the charging coil is about 40 °; when the first ratio is 0.9, that is, the duration of the first working voltage accounts for nine tenth of the whole working period T, at this time, the charging current of the wireless transmission module is 400mA, the charging temperature of the wireless transmission module is about 65 °, that is, the temperature of the charging coil is about 65 °.
In one embodiment, the operating voltage of the wireless transmitting module may be adjusted by controlling the operating state of the voltage adjusting module, for example, when the voltage adjusting module is in the first operating state, the wireless transmitting module operates at the first operating voltage, and when the voltage adjusting module is in the second operating state, the wireless transmitting module operates at the second operating voltage.
In one embodiment, the first operating state of the voltage regulation module may be an on state and the second operating state of the voltage regulation module may be an off state. That is, when the voltage regulation module is in the on state, the wireless transmitting module works in the fast charging mode, and when the voltage regulation module is in the off state, the wireless transmitting module works in the ordinary charging mode or the wireless transmitting module stops transmitting the wireless charging signal.
In one embodiment, the wireless charging method in this embodiment further includes a fast charging adjustment step. Specifically, referring to fig. 4, the fast charge adjustment step includes steps 51 and 52.
And step 51, comparing the working current value with the quick charge regulation range value.
Step 52, when the working current value is smaller than the lower limit value of the quick charge regulation range value, increasing a first ratio; and when the working current value is larger than the upper limit value of the quick charge adjusting range value, reducing the first ratio.
In this embodiment, the working current value of the wireless transmitting module is monitored in real time, for example, the working current value of the wireless transmitting module is detected at preset time intervals, and the temperature of the wireless charging base is monitored in real time according to the working current value, for example, if the working current value of the wireless transmitting module is smaller than the lower limit value of the fast charging adjustment range value, the temperature of the wireless charging base is determined to be lower, at this time, the charging speed of the wireless charging base can be increased by increasing the first ratio, that is, by increasing the holding time of the first working voltage in each working period T, so as to achieve the purpose of fast success, if the working current value of the wireless transmitting module is greater than the upper limit value of the fast charging adjustment range value, the temperature of the wireless charging base is determined to be higher, at this time, by decreasing the first ratio, that is, that by decreasing the holding time of the first working voltage in each working period T, therefore, the working current value of the wireless transmitting module is reduced by reducing the working time of the wireless transmitting module under the first working voltage, the heat productivity of the wireless charging base is further reduced, and the purpose of reducing the temperature of the wireless charging base is achieved. The quick charging adjustment is realized by controlling the working current value within the quick charging adjustment range value, so that the quick charging working current value is dynamically controlled, the high-efficiency quick charging of the wireless charging base is ensured, and the charging temperature of the wireless charging base is dynamically regulated and controlled to be not more than an ideal range.
In one embodiment, the wireless charging method in this embodiment further includes: the first ratio is adjusted based on the electric quantity signal output by the device to be charged, for example, the electric quantity signal and the first ratio are in a preset inverse proportional relationship, the inverse proportional relationship may be a preset linear relationship or a preset curve relationship, and the lower the electric quantity of the device to be charged represented by the electric quantity signal is, the higher the first ratio is, so that when the electric quantity of the device to be charged is lower, the duration time of the first working voltage in each working period T is increased to increase the charging speed.
In one embodiment, the wireless charging method in this embodiment further includes: and determining a quick charging parameter according to the working current value sequence generated by the wireless transmitting module under a plurality of preset wireless transmitting frequencies so as to control the wireless transmitting module to generate a corresponding wireless charging signal and charge the equipment to be charged.
Specifically, in this embodiment, a corresponding working current value sequence may be generated by obtaining working current values of the wireless transmitting module at a plurality of wireless transmitting frequencies, so as to determine a model of a device to be charged on the wireless charging base, and thus determine corresponding fast charging parameters.
In one embodiment, the type of the device to be charged is matched through the working current value array to determine the corresponding fast charging parameters, that is, each device to be charged has the corresponding fast charging parameter, and the device to be charged is charged by setting the corresponding fast charging parameters, so that the problem that the device to be charged is damaged due to the fact that the working voltage or the working current is not matched can be avoided.
In one embodiment, the working current value sequence and the type or specific model of the device to be charged have a preset mapping relationship, each type or specific model of the device to be charged corresponds to one working current value sequence, the type or model of the device to be charged can be determined based on the working current value sequence, and then the corresponding fast charging parameter is determined based on the type or model of the device to be charged.
Specifically, for example, the operating current value series of the wireless transmission module at a plurality of wireless transmission frequencies are detected as i1, i2, i3, i4 and i5, based on the operating current value series i1, i2, i3, i4 and i5, the type or model of the device to be charged can be obtained from a mapping relation database between the preset operating current value series and the type (or model) of the device to be charged, and then the corresponding fast charging parameter is determined based on the type or model of the device to be charged.
In one embodiment, the model of the device to be charged is matched through the working current value number series to determine the corresponding fast charging parameter, for example, the device to be charged is an electric toothbrush, and the working current value of each electric toothbrush under a plurality of preset working voltages has the working current value number series corresponding to the electric toothbrush, so that the model of the electric toothbrush to be charged is determined by matching the working current value number series, and the corresponding fast charging parameter is determined, thereby not only achieving the purpose of fast charging, but also avoiding charging faults caused by different product models of the device to be charged.
In one embodiment, the fast charge parameter may be at least one of a first ratio, a duty cycle T, a wireless transmission frequency, a first operating voltage, and a second operating voltage.
Specifically, the ratio of the duration TA of the first working voltage in each working period T to the working period T may be determined according to the working current value sequence; the working period of the wireless transmission module working alternately at the first working voltage and the second working voltage can be determined according to the working current value sequence; the wireless transmitting frequency of the wireless transmitting module can be determined according to the working current value sequence; the voltage value of the first operating voltage may also be determined from the sequence of operating current values and the voltage value of the second operating voltage may be determined from the sequence of operating current values.
In one embodiment, determining the wireless transmission frequency of the wireless transmission module according to the operating current value sequence specifically includes: and acquiring the wireless transmitting frequency corresponding to the working current value sequence from a preset current value sequence database according to the working current value sequence.
Specifically, the preset current value array database in this embodiment may be a mapping relation table between working current value arrays and wireless transmission frequencies, where each working current value array corresponds to one wireless transmission frequency, and the wireless transmission frequency is a frequency for charging the device to be charged by the wireless transmission module. For example, the current value sequence database includes N operating current value sequences and N wireless transmission frequencies, where N is a positive integer, the N operating current value sequences respectively correspond to the N wireless transmission frequencies one by one, and the operating current value sequences in the non-operating current value sequence database all correspond to the standby wireless transmission frequency, where the standby wireless transmission frequency is used to control the wireless transmission module to be in a standby state. In a specific application, if the working current value sequence of the wireless transmitting module at the preset wireless transmitting frequency does not belong to the preset N working current value sequences, it is indicated that the device to be charged is an illegal charging device, and at this time, the wireless transmitting module is in a standby state, and charging of the device on the wireless charging base is rejected.
In an embodiment, the temperature of the wireless charging base can be detected at preset temperature detection time intervals, the temperature of the wireless charging base can be monitored in real time, and damage to devices due to overhigh temperature of the wireless charging base is avoided.
In one embodiment, referring to fig. 5, the wireless charging method in this embodiment further includes a full charge detection step, and the full charge detection step includes steps 61 to 63.
And 61, switching the wireless transmission frequency of the wireless transmission module to be full of detection frequency.
And step 62, acquiring a full detection current value of the wireless transmitting module at the full detection frequency.
And step 63, comparing the full-filling detection current value with a preset full-filling reference value, and judging that the current is full when the full-filling detection current value is smaller than the full-filling reference value.
Specifically, in one embodiment, the charging is determined to be full by switching the wireless transmission frequency of the wireless transmission module to the full-charge detection frequency and determining whether the device to be charged is full based on the full-charge detection current value of the wireless transmission module at the full-charge detection frequency, for example, when the full-charge detection current value is smaller than the full-charge reference value.
In one embodiment, after a preset time interval T2, the device to be charged is full-detected, and it is determined whether the device to be charged is full based on the full-detection current value of the wireless transmission module at the full-detection frequency, if so, a preset adjustment operation is performed, and the wireless transmission module is controlled to be in a standby state, and if not, the adjustment operation is not performed.
In this embodiment, the preset full detection frequency may be determined based on the type or specific model of the device to be charged. The wireless transmitting frequency of the wireless transmitting module is adjusted to the preset full detection frequency by adjusting the wireless transmitting frequency of the wireless transmitting module after the preset time interval T2, and the working current value of the wireless transmitting module at the full detection frequency is acquired.
In an embodiment, the preset time interval T2 for the full charge detection may be determined by a type or a specific model of the device to be charged, specifically, the type or the specific model of the device to be charged may be determined based on the operating current value sequence, the type or the specific model of the device to be charged and the preset time interval T2 have a preset mapping relationship, and each type or the specific model of the device to be charged corresponds to one preset time interval T2. In a specific application scenario, the device to be charged is full or nearly full after the preset time interval T2, and therefore, whether the device to be charged is full is determined by detecting the operating current value of the wireless transmission module at the full detection frequency.
It should be noted that, for convenience and brevity of description, the specific working process of the wireless quick charging method described above may refer to the working process of the wireless charging base in the foregoing embodiment, and is not described herein again.
Referring to fig. 6, the wireless charging apparatus in this embodiment further includes a control module 810, a wireless transmitting module 820, a frequency adjusting module 830, a voltage adjusting module 840, and a current detecting module 850.
A control module 810 for sending a control signal;
a wireless transmitting module 820, configured to transmit a wireless charging signal;
a frequency adjusting module 830, configured to adjust a wireless transmitting frequency of the wireless transmitting module 820;
the voltage adjusting module 840 is used for adjusting the working voltage of the wireless transmitting module 820 so as to perform fast charging adjustment;
a current detection module 850, configured to obtain a working current value of the wireless transmission module 820; the wireless transmission device is also used for generating a working current value array under a plurality of preset wireless transmission frequencies according to the control signal and matching the working current value array with the preset current value array; and the controller is also used for carrying out foreign matter treatment judgment and full detection according to the control signal.
In this embodiment, the control module 810 is configured to send a control signal, the wireless transmitting module 820 is configured to transmit a wireless charging signal, the frequency adjusting module 830 is configured to adjust a wireless transmitting frequency of the wireless transmitting module 820 according to the control signal output by the control module 810, the voltage adjusting module 840 is configured to adjust a working voltage of the wireless transmitting module 820 for fast charging adjustment, and the current detecting module 850 is configured to obtain a working current value of the wireless transmitting module 820; the wireless transmission device is also used for generating a working current value array under a plurality of preset wireless transmission frequencies according to the control signal and matching the working current value array with the preset current value array; and the controller is also used for carrying out foreign matter treatment judgment and full detection according to the control signal. After the wireless charging base is started, the current detection module 850 obtains the working current value of the wireless transmission module 820, and determines whether the working current value of the wireless transmission module is within a preset current value range; if the working current value of the wireless transmitting module is within the preset current value range, the frequency adjusting module 830 adjusts the wireless transmitting frequency of the wireless transmitting module 820, the current detecting module 850 obtains the working current values of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, generates a working current value sequence, matches the working current value sequence with the preset current value sequence, and if the working current value sequence is matched with the preset current value sequence, the voltage adjusting module 830 drives the wireless transmitting module 820 to alternatively work under at least two working voltages.
Specifically, in an embodiment, after the wireless transmitting module is started, the current detecting module 850 obtains an operating current value of the wireless transmitting module 820 at a preset starting detection frequency, and detects whether a foreign object exists on the wireless charging base based on the operating current value, and when the voltage adjusting module 830 does not have a foreign object on the wireless charging base, the wireless transmitting module is driven to alternately operate at least two operating voltages.
It should be noted that, for convenience and brevity of description, the specific working process of the foreign object detection apparatus described above may refer to the corresponding process of the method in fig. 1 to fig. 5, and is not described herein again.
The embodiment of the present application further provides a wireless charging base 9, and as shown in fig. 7, the wireless charging base 9 includes: a wireless transmitting module 93, a processor 90, a memory 91 and a computer program 92 stored in the memory 91 and operable on the processor 90, wherein the wireless transmitting module 93 is used for transmitting a wireless charging signal, and the processor executes the computer program to implement the steps of the foreign object detection method according to any one of the above embodiments.
The processor 90 executes the computer program 92 to implement the steps in the above-described wireless charging method embodiment, such as the steps 10 to 30 shown in fig. 1. Alternatively, the processor 90, when executing the computer program 92, implements the functionality of the various modules/units in the various apparatus embodiments described above, e.g., the functionality in modules 810, 820, 830, 840 and 850 shown in fig. 5.
Illustratively, the computer program 92 may be partitioned into one or more modules/units, which are stored in the memory 91 and executed by the processor 90 to accomplish the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of the computer program 92 in the wireless charging base 9.
The wireless charging base 9 may include, but is not limited to, a processor 90, a memory 91. Those skilled in the art will appreciate that fig. 7 is merely an example of the wireless charging base 9 and does not constitute a limitation of the wireless charging base 9 and may include more or less components than those shown, or combine certain components, or different components, for example, the terminal device may also include input-output devices, network access devices, buses, etc.
The embodiment of the application also provides a personal care appliance, which comprises a wireless receiving module and a wireless charging base as described in any one of the above; the wireless receiving module is used for receiving a wireless charging signal transmitted by a wireless transmitting module of the wireless charging base.
The Processor 90 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 91 may be an internal storage unit of the wireless charging base 9, such as a hard disk or a memory of the wireless charging base 9. The memory 91 may also be an external storage device of the wireless charging base 9, such as a plug-in hard disk provided on the wireless charging base 9, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 91 may also include both an internal storage unit of the wireless charging base 9 and an external storage device. The memory 91 is used for storing computer programs and other programs and data required by the terminal device. The memory 91 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (15)

1. A wireless charging method is applied to a wireless charging base, the wireless charging base comprises a wireless transmitting module used for transmitting a wireless charging signal, and the wireless charging method comprises the following steps:
acquiring a working current value of the wireless transmitting module;
judging whether the working current value of the wireless transmitting module is within a preset current value range or not; if the working current value of the wireless transmitting module is within a preset current value range, obtaining the working current value of the wireless transmitting module under a plurality of preset wireless transmitting frequencies, and generating a working current value sequence;
matching the working current value sequence with a preset current value sequence, and if the working current value sequence is matched with the preset current value sequence in a consistent manner, driving the wireless transmitting module to alternately work under at least two working voltages;
the matching of the working current value array and the preset current value array comprises the following steps: the current value curve in the working current value array is consistent with the waveform curve of a preset current value array;
the driving the wireless transmitting module to alternately work under at least two working voltages comprises: the wireless transmission module is driven to alternately work by a first working voltage and a second working voltage in each working period T, wherein the duration of the first working voltage in the working period T is TA, the ratio of TA to the working period T is a first ratio, and the value range of the first ratio is [0.1, 0.9 ].
2. The wireless charging method of claim 1, wherein if the operating current value sequence matches the predetermined current value sequence, the method comprises:
and judging whether the wireless transmitting frequency corresponding to the maximum current value in the working current value array is positioned in a preset frequency threshold interval, if so, judging that the working current value array is matched with the preset current value array consistently.
3. The wireless charging method of claim 1, wherein if the operating current value sequence matches the predetermined current value sequence, the method comprises:
judging whether the working current value i0 corresponding to the preset transmitting frequency F0 is the maximum current value in the working current value array, if so, judging that the working current value array is matched with the preset current value array; wherein the plurality of preset wireless transmission frequencies includes the preset transmission frequency F0.
4. The wireless charging method of claim 1, wherein the predetermined current value range includes a first current threshold, and the first current threshold is a lower limit value of the predetermined current value range, and if the operating current value is smaller than the first current threshold, the wireless charging base is determined to be in an idle state.
5. The wireless charging method of claim 1, wherein the predetermined current value range includes a second current threshold, and the second current threshold is an upper limit of the predetermined current value range, and if the operating current value is greater than the second current threshold, it is determined that the wireless charging base is in a foreign object state.
6. The wireless charging method of claim 1, wherein if the operating current value sequence is not matched with the preset current value sequence, it is determined that the wireless charging base is in a foreign object state.
7. The wireless charging method according to claim 5 or 6, further comprising a foreign matter handling determination step including:
acquiring a working current value of the wireless transmitting module;
comparing the working current value with a preset foreign matter treatment current value;
if the working current value is smaller than the foreign matter treatment current value, judging that the wireless charging base is in an idle state;
and if the working current value is not less than the foreign matter treatment current value, judging that the wireless charging base is still in a foreign matter state.
8. The wireless charging method according to claim 7, wherein the foreign matter processing determination step is performed once every a preset time interval T1 when the wireless charging base is in a foreign matter state.
9. The wireless charging method according to claim 1, further comprising a fast charge regulating step, the fast charge regulating step comprising:
comparing the working current value with a quick charge regulation range value;
when the working current value is smaller than the lower limit value of the quick charge regulation range value, increasing the first ratio; and when the working current value is larger than the upper limit value of the quick charge regulation range value, reducing the first ratio.
10. The wireless charging method according to any one of claims 1 to 6 and 8 to 9, further comprising a full charge detection step, the full charge detection step comprising:
switching the wireless transmitting frequency of the wireless transmitting module to be full of detecting frequency;
acquiring a full detection current value of the wireless transmitting module under the full detection frequency;
and comparing the full-filling detection current value with a preset full-filling reference value, and judging that the current is full when the full-filling detection current value is smaller than the full-filling reference value.
11. The wireless charging method according to claim 10, wherein the full detection step is performed at every preset time interval T2.
12. The utility model provides a wireless charging device, includes control module, control module is used for sending control signal, its characterized in that, wireless charging device still includes:
the wireless transmitting module is used for transmitting a wireless charging signal;
the frequency adjusting module is used for adjusting the wireless transmitting frequency of the wireless transmitting module;
the voltage adjusting module is used for adjusting the working voltage of the wireless transmitting module so as to perform quick charging adjustment;
the current detection module is used for acquiring the working current value of the wireless transmission module; the wireless transmission device is also used for generating a working current value array under a plurality of preset wireless transmission frequencies according to the control signal and matching the working current value array with a preset current value array; the controller is also used for carrying out foreign matter treatment judgment and full detection according to the control signal;
the voltage regulating module is also used for driving the wireless transmitting module to alternately work under at least two working voltages when the working current value array is matched with a preset current value array;
wherein, the matching of the working current value array and the preset current value array comprises: the current value curve in the working current value array is consistent with the waveform curve of a preset current value array;
the driving the wireless transmitting module to alternately work under at least two working voltages comprises: the wireless transmission module is driven to alternately work by a first working voltage and a second working voltage in each working period T, wherein the duration of the first working voltage in the working period T is TA, the ratio of TA to the working period T is a first ratio, and the value range of the first ratio is [0.1, 0.9 ].
13. A wireless charging base, comprising: a wireless transmission module for transmitting a wireless charging signal, a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the wireless charging method according to any one of claims 1 to 11 when executing the computer program.
14. A personal care appliance, characterized in that the personal care appliance comprises the wireless charging base of claim 13.
15. A computer storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the wireless charging method according to any one of claims 1 to 11.
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US9735623B2 (en) * 2011-05-17 2017-08-15 Samsung Electronics Co., Ltd. Power transmitting method and power transmitter for communication with power receiver
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