CN113054759A - Wireless power receiving device, wireless charging system and electronic equipment - Google Patents
Wireless power receiving device, wireless charging system and electronic equipment Download PDFInfo
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- CN113054759A CN113054759A CN202110347872.5A CN202110347872A CN113054759A CN 113054759 A CN113054759 A CN 113054759A CN 202110347872 A CN202110347872 A CN 202110347872A CN 113054759 A CN113054759 A CN 113054759A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses wireless can receiving arrangement, wireless charging system and electronic equipment belongs to wireless charging technical field. The wireless power receiving apparatus includes: the receiving coil is used for coupling and receiving electromagnetic waves sent by a sending coil of the wireless power sending device, and the receiving coil is connected with a load; and the controller is used for charging the load by using the electric energy of the electromagnetic wave at the at least one resonance splitting frequency received by the receiving coil under the condition that the transmitting coil works in the frequency splitting state. In the embodiment of the application, the load is charged by utilizing the electromagnetic wave of the transmitting coil working under at least one resonance splitting frequency in the frequency splitting state, so that one wireless power transmitting device and a plurality of wireless power receiving devices are simultaneously connected and charged, the plurality of wireless power receiving devices are not interfered with each other, and the energy transmission efficiency is improved.
Description
Technical Field
The application belongs to the technical field of wireless charging, and particularly relates to a wireless energy receiving device, a wireless charging system and electronic equipment.
Background
At present, the technology popularization and the technology maturation of the wireless charging of the mobile phone are increasing, and the wireless charging function is favored by consumers. The inductance of the coil can be changed due to the coupling distance between the transmitting coil and the receiving coil, so that the self-resonant frequency of the coil can generate a frequency splitting phenomenon along with the distance, wherein the frequency splitting phenomenon is mainly caused by the fact that the coupling coefficient between the coils is changed due to the change of the distance between the transmitting coil and the receiving coil, and finally the transmission efficiency of the wireless charging system generates a phenomenon of multiple peaks. However, since the output frequency of the system is fixed, the frequency splitting phenomenon of the coil can cause the energy transmitted by the system to be dissipated, and the energy cannot be transmitted in a centralized manner, so that the transmission efficiency is reduced.
Disclosure of Invention
The embodiment of the application aims to provide a wireless energy receiving device, a wireless charging system and electronic equipment, which can solve the problems that in the prior art, the loss of system transmission energy can occur due to the frequency splitting phenomenon, the energy cannot be transmitted in a centralized manner, and the transmission efficiency is reduced.
In a first aspect, an embodiment of the present application provides a wireless power receiving apparatus, including:
the receiving coil is used for coupling and receiving electromagnetic waves sent by a sending coil of the wireless power sending device, and the receiving coil is connected with a load;
and the controller is used for charging the load by using the electric energy of the electromagnetic wave at the at least one resonance splitting frequency received by the receiving coil under the condition that the transmitting coil works in the frequency splitting state.
Optionally, the controller determines that the transmitting coil operates in a frequency splitting state when a coupling coefficient between the receiving coil and the transmitting coil is greater than or equal to a preset coupling coefficient threshold.
Optionally, the wireless power receiving apparatus is applied to a first electronic device, the wireless power transmitting apparatus is further connected to a second electronic device, the second electronic device may receive the electromagnetic wave sent by the wireless power transmitting apparatus and charge the electromagnetic wave by using the received electromagnetic wave, and the wireless power receiving apparatus further includes:
the frequency receiving module is used for receiving charging peak frequency information sent by the second electronic equipment, wherein the charging peak frequency information is peak frequency information of the second electronic equipment which is charged by using received electromagnetic waves;
and the crosstalk prompting module is used for displaying prompting information for prompting the distance or the approach of the load from the transmitting coil under the condition that the frequency difference value between the charging peak frequency of the load and the charging peak frequency of the second electronic equipment is smaller than a preset difference value.
Optionally, the wireless power receiving apparatus further includes:
the receiving side capacitance tuning module is connected with the receiving coil and used for tuning the receiving coil under the condition that the distance between the receiving coil and the transmitting coil is changed, so that the resonance splitting frequency of the electromagnetic waves received by the receiving coil is kept constant.
Optionally, the wireless power receiving apparatus further includes:
the frequency acquisition module is used for acquiring frequency information of the electromagnetic waves received by the receiving coil and transmitting the frequency information to the receiving side capacitance tuning module, and the receiving side capacitance tuning module can tune the receiving coil according to the frequency information, wherein the frequency information can represent the distance change between the receiving coil and the transmitting coil.
Optionally, the wireless power receiving apparatus further includes:
and the distance measuring module is used for acquiring distance information between the receiving coil and the transmitting coil and transmitting the distance information to the receiving side capacitance tuning module, and the receiving side capacitance tuning module can tune the receiving coil according to the distance information.
Optionally, the resonance splitting frequency includes a first resonance splitting frequency and a second resonance splitting frequency, where the load is charged with electric energy of an electromagnetic wave at the first resonance splitting frequency, and the wireless power receiving apparatus further includes:
and the first filtering module is used for filtering out the second resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves with the first resonance splitting frequency.
Optionally, the method further includes:
the second filtering module is used for filtering the first resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves of the second resonance splitting frequency;
the first phase-locked loop module is used for modulating the electromagnetic wave with the second resonance splitting frequency output by the second filtering module into the electromagnetic wave with the first resonance splitting frequency;
the first superposition module is connected with the load, and is used for superposing the electromagnetic wave with the first resonance splitting frequency output by the first filtering module and the electromagnetic wave with the first resonance splitting frequency obtained by modulation of the first phase-locked loop module, and outputting the superposed electromagnetic wave to the load.
Optionally, the wireless power receiving apparatus further includes:
the second phase-locked loop module is used for modulating the frequency of the electromagnetic wave output by the receiving coil, so that the frequency of the electromagnetic wave generates deviation of a preset deviation frequency threshold value, and the electromagnetic wave after frequency deviation is output;
the synthesis module is used for synthesizing the electromagnetic wave output by the receiving coil and the electromagnetic wave after frequency shift output by the second phase-locked loop module and outputting the electromagnetic wave with at least three charging wave peak frequencies;
and the third filtering module is connected with the load and used for filtering other charging peak frequencies except the target charging peak frequency in the electromagnetic waves output by the synthesis module and outputting the electromagnetic waves of the target charging peak frequency to the load.
Optionally, the wireless power receiving apparatus further includes:
the output end of the receiving coil is respectively connected with the first switch, the second switch and the third switch;
the fourth filtering module is connected with the first switch and is used for filtering other frequencies except the target resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves of the target resonance splitting frequency to the load;
the second switch is also connected with the second phase-locked loop module and the synthesis module;
a fifth filtering module, connected to the third switch, configured to filter a first resonance splitting frequency in the electromagnetic wave received by the receiving coil and output an electromagnetic wave with a second resonance splitting frequency, where the resonance splitting frequency includes the first resonance splitting frequency and the second resonance splitting frequency;
the sixth filtering module is connected with the third switch and is used for filtering out the second resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves with the first resonance splitting frequency;
the third phase-locked loop module is used for modulating the electromagnetic wave with the second resonance splitting frequency output by the fifth filtering module into the electromagnetic wave with the first resonance splitting frequency;
the second superposition module is connected with the load, and is used for superposing the electromagnetic wave with the first resonance splitting frequency output by the sixth filtering module and the electromagnetic wave with the first resonance splitting frequency obtained by modulation of the third phase-locked loop module, and outputting the superposed electromagnetic wave to the load;
the communication module is used for communicating with the wireless power transmitting device and acquiring the quantity information of the electronic equipment connected with the wireless power transmitting device;
the controller is further configured to control the switching states of the first switch, the second switch, and the third switch according to the quantity information acquired by the communication module.
In a second aspect, the present application provides a wireless charging system, including the wireless energy receiving apparatus according to the first aspect.
Optionally, the wireless charging system further includes a wireless power transmitting device, and the wireless power transmitting device includes:
a transmitting coil for transmitting an electromagnetic wave;
the transmitting side capacitance tuning module is connected with the transmitting coil and used for tuning the transmitting coil under the condition that the distance between the receiving coil and the transmitting coil is changed, so that the resonance splitting frequency of the electromagnetic waves transmitted by the transmitting coil is kept constant.
In a third aspect, an embodiment of the present application provides an electronic device, which includes the radio energy receiving apparatus according to the first aspect.
In the embodiment of the application, the load is charged by utilizing the electromagnetic wave of the transmitting coil working under at least one resonance splitting frequency in the frequency splitting state, so that one wireless power transmitting device and a plurality of wireless power receiving devices are simultaneously connected and charged, and the plurality of wireless power receiving devices are not interfered with each other.
Drawings
Fig. 1 is a schematic diagram of a wireless power transmitting apparatus for simultaneously charging two loads according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a wireless power receiving apparatus according to an embodiment of the present application;
fig. 3 is a second schematic structural diagram of a wireless energy receiving apparatus according to an embodiment of the present application;
fig. 4 is a third schematic structural diagram of a wireless power receiving apparatus according to an embodiment of the present application;
fig. 5 is a fourth schematic structural diagram of a wireless power receiving apparatus according to an embodiment of the present application;
fig. 6 is a fifth schematic structural diagram of a wireless energy receiving device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The wireless power receiving device, the wireless charging system and the electronic device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
The magnetic coupling resonance coil has three conditions in the coupling state, the first condition is critical coupling, namely the coupling frequency between the transmitting coil and the receiving coil is the same as the self-resonance frequency, namely the distance between the coils is just a certain critical value, at the moment, as long as the signal output frequency is the same as the self-resonance frequency, the coils can work in the resonance state, and the energy transmission effect is best at the moment; the second is an over-coupling state, that is, the distance between the transmitting coil and the coupling coil is reduced, that is, the distance between the coils is smaller than a critical value, at this time, the coupling coefficient between the coils is increased, so that the mutual inductance between the coils is increased, the self-resonant frequency is subjected to frequency splitting, and the resonant frequency after the frequency splitting shifts the frequency of the signal output end, so that the coils cannot work to a resonant state, and the energy transmission effect is reduced sharply; the third is a weak coupling state, that is, the distance between the transmitting coil and the coupling coil becomes longer, that is, the distance between the coils is greater than a critical value, and at this time, the coupling coefficient between the coils becomes smaller, the impedance between the coils becomes larger, the energy loss becomes larger, and the transmission efficiency of energy in the resonance state becomes lower.
The frequency splitting phenomenon can cause the system to generate dissipation when transmitting energy, the energy cannot be transmitted in a centralized manner, and the transmission efficiency of the system at any splitting frequency is lower than that of the system in a critical coupling state. However, the inventors have found by analysis that when the coupling coefficient is within a certain range, the sum of the efficiencies at two splitting frequencies in the frequency splitting state is larger than the efficiency at only one resonance frequency in the critical coupling. Therefore, when two resonance splitting frequencies generated by frequency splitting are used for respectively charging two devices with different resonance frequencies, the transmission efficiency can be effectively improved.
Based on this, the embodiment of the present application provides a wireless power receiving apparatus, which includes a receiving coil and a controller, wherein the receiving coil is coupled to a transmitting coil of a wireless power transmitting apparatus, and is used for coupling and receiving an electromagnetic wave transmitted by the transmitting coil of the wireless power transmitting apparatus, and the receiving coil is connected to a load; the controller is used for charging the load by using the electric energy of at least one resonance splitting frequency in the electromagnetic waves received by the receiving coil under the condition that the transmitting coil works in a frequency splitting state. Therefore, the load is charged by utilizing the electromagnetic wave of the transmitting coil working under at least one resonance splitting frequency in the frequency splitting state, so that one wireless power transmitting device can simultaneously support the charging connection with a plurality of wireless power receiving devices, the plurality of wireless power receiving devices are not interfered with each other, and the energy transmission efficiency is improved. That is, since each wireless power receiving device can be charged by using the electromagnetic wave at one resonance splitting frequency, thereby allowing a plurality of wireless power receiving devices to be simultaneously charged by the electromagnetic wave having the splitting frequency transmitted by the wireless power transmitting device, when the plurality of wireless power receiving devices are charged by using the electromagnetic wave at different resonance splitting frequencies, the energy transmission efficiency between the wireless power transmitting device and the plurality of wireless power receiving devices is the highest, that is, the active power of the whole transmission system is the highest at this time.
In some embodiments of the present application, the controller determines that the transmitting coil is operating in a frequency splitting state if a coupling coefficient between the receiving coil and the transmitting coil is greater than or equal to a preset coupling coefficient threshold. That is, whether the transmitting coil operates in the frequency splitting state may be determined by obtaining a coupling coefficient between the receiving coil and the transmitting coil, so that the load is charged with the electric energy of the electromagnetic wave at the at least one resonance splitting frequency received by the receiving coil in a case where the transmitting coil operates in the frequency splitting state. Wherein the preset coupling coefficient threshold may be determined according to parameters of the receiving coil and the transmitting coil.
Optionally, the wireless power receiving apparatus may include a distance obtaining module, where the distance obtaining module is configured to obtain distance information between the receiving coil and the transmitting coil, and since a coupling coefficient between the receiving coil and the transmitting coil is related to a distance between the receiving coil and the transmitting coil, the controller may determine whether the coupling coefficient between the receiving coil and the transmitting coil is greater than or equal to a preset coupling coefficient threshold according to the distance information.
In some embodiments of the present application, the wireless power receiving apparatus may further include a distance prompt module, and the controller controls the distance prompt module to display a prompt message for prompting to get away from or get close to the transmitting coil when the distance between the transmitting coil and the receiving coil does not satisfy a preset condition, so that a user searches for an appropriate distance according to the prompt message, and the transmitting coil operates in a frequency splitting state.
Referring to fig. 1, a schematic diagram of a wireless power transmitting apparatus for charging two loads at the same time is shown. In some embodiments of the present application, for example, the wireless power receiving apparatus includes a power output module 111 and a transmitting coil 112 connected to the power output module 111, the wireless power receiving apparatus is respectively connected to the first electronic device 12 and the second electronic device 13, the first electronic device 12 includes the wireless power receiving apparatus, the wireless power receiving apparatus includes a receiving coil 121, and the receiving coil 121 is connected to a load 122; the second electronic device can receive the electromagnetic wave sent by the wireless power transmitting device and charge by using the received electromagnetic wave. That is, the transmitting coil emits electromagnetic waves including a first resonance splitting frequency and a second resonance splitting frequency, the first electronic device can be charged by using the electromagnetic wave of one of the two resonance splitting frequencies, and the second electronic device can be charged by using the electromagnetic wave of the other resonance splitting frequency, at this time, the total transmission efficiency of the wireless power transmitting apparatus with the first electronic device and the second electronic device is the highest. Optionally, the wireless power receiving apparatus further includes: the frequency receiving module is used for receiving charging peak frequency information sent by the second electronic equipment, wherein the charging peak frequency information is peak frequency information of the second electronic equipment which is charged by using received electromagnetic waves; and the crosstalk prompting module is used for displaying prompting information for prompting the distance or the approach of the load from the transmitting coil under the condition that the frequency difference value between the charging peak frequency of the load and the charging peak frequency of the second electronic equipment is smaller than a preset difference value. That is, since the first electronic device and the second electronic device are charged simultaneously, a frequency difference exists between the two resonance splitting frequencies, and when the frequency difference is too small, crosstalk may occur between the first electronic device and the second electronic device, and therefore, it should be ensured that an appropriate distance is maintained between the two resonance splitting frequencies to prevent crosstalk from occurring; specifically, the charging peak frequency information sent by the second electronic device may be received, where the charging peak frequency information includes a charging peak frequency of the second electronic device, and by obtaining a charging peak frequency of the second electronic device and comparing the charging peak frequency with a charging peak frequency of a load of the second electronic device, if a frequency difference between the charging peak frequency of the load of the first electronic device and the charging peak frequency of the second electronic device is smaller than a preset difference, it indicates that crosstalk is likely to occur, at this time, the controller controls the crosstalk prompting module to display prompting information for prompting the user to move away from or close to the transmitting coil, so that the user adjusts a distance between the first electronic device and the wireless power transmitting apparatus, so that a frequency difference between the charging peak frequency of the load of the first electronic device and the charging peak frequency of the second electronic device is larger than the preset difference, at this time, the distance between the first electronic device and the second electronic device will also change, thereby ensuring that no crosstalk occurs between the first electronic device and the second electronic device. The preset difference value can be set according to coil parameters.
Please refer to fig. 2, which is a schematic structural diagram of a wireless energy receiving apparatus according to an embodiment of the present application. As shown in fig. 2, in some embodiments of the present application, the wireless power receiving apparatus 20 further includes a receiving-side capacitance tuning module 123, the receiving-side capacitance tuning module 123 is connected to the receiving coil 121, and the receiving-side capacitance tuning module 123 is configured to tune the receiving coil 121 to keep a resonance splitting frequency of the electromagnetic wave received by the receiving coil 121 constant when a distance between the receiving coil 121 and the transmitting coil 112 changes.
As shown in fig. 2, in some embodiments of the present application, optionally, the wireless power receiving apparatus 20 further includes a frequency collecting module 124, where the frequency collecting module 124 is configured to collect frequency information of the electromagnetic wave received by the receiving coil 121 and transmit the frequency information to the receiving-side capacitance tuning module 123, and the receiving-side capacitance tuning module 123 may tune the receiving coil 121 according to the frequency information, where the frequency information may represent a change in a distance between the receiving coil 121 and the transmitting coil 112.
Please refer to fig. 3, which is a second schematic structural diagram of a wireless energy receiving apparatus according to an embodiment of the present application. As shown in fig. 3, in other embodiments of the present application, the wireless power receiving apparatus 20 may further include a ranging module 126, where the ranging module 126 is configured to collect distance information between the receiving coil 121 and the transmitting coil 112, and transmit the distance information to the receiving-side capacitance tuning module 123, and the receiving-side capacitance tuning module 123 may tune the receiving coil 121 according to the distance information. That is to say, the frequency acquisition module 124 may be replaced with a ranging module 126, the ranging module 126 may specifically adopt an Ultra-wide band (UWB) ranging communication module, and the like, and since a change in the distance between the receiving coil 121 and the transmitting coil 112 may cause a change in the coupling coefficient, a capacitance tuning value of the receiving-side capacitance tuning module 123 may be solved according to a measured distance value, parameters of the receiving coil 121 and the transmitting coil 112, and the like, and fed back to the receiving-side capacitance tuning module 123, thereby implementing tuning of the receiving coil 121.
As shown in fig. 2 or fig. 3, in some optional embodiments, the wireless power transmitting apparatus further includes a transmitting-side capacitance tuning module 113 connected to the transmitting coil, where the transmitting-side capacitance tuning module 113 is configured to tune the transmitting coil 112 to keep a resonance splitting frequency of the electromagnetic wave transmitted by the transmitting coil 112 constant when a distance between the receiving coil 121 and the transmitting coil 112 changes.
As shown in fig. 2 or fig. 3, in some embodiments of the present application, the resonance splitting frequency includes a first resonance splitting frequency and a second resonance splitting frequency, wherein the load is charged with power of the electromagnetic wave at the first resonance splitting frequency, and the wireless power receiving apparatus 20 may further include a first filtering module 125, where the first filtering module 125 is connected to the receiving-side capacitance tuning module 123, and is configured to filter the second resonance splitting frequency from the electromagnetic wave received by the receiving coil 121 and output the electromagnetic wave at the first resonance splitting frequency. Therefore, when the wireless power transmitting device is connected with two electronic devices, the wireless power transmitting device can be charged by using two resonance splitting frequencies respectively without mutual interference. That is, for the first electronic device, it is charged with the electric energy of the electromagnetic wave at the first resonance splitting frequency, and thus other frequencies can be filtered out by the first filtering module 125, leaving only the first resonance splitting frequency. For the second electronic device, the second electronic device is charged by using the electric energy of the electromagnetic wave at the second resonance splitting frequency, so that other frequencies can be filtered out by the filtering module, and only the second resonance splitting frequency is left.
Please refer to fig. 4, which is a third schematic structural diagram of a wireless energy receiving apparatus according to an embodiment of the present application. As shown in fig. 4, in some embodiments of the present application, the wireless power receiving apparatus 20 further includes a second filtering module 127, a first phase-locked loop module 128, and a first superposition module (not shown); the second filtering module 127 is configured to filter a first resonance splitting frequency in the electromagnetic waves received by the receiving coil 121, and output an electromagnetic wave with a second resonance splitting frequency; the first phase-locked loop module 128 is configured to modulate the electromagnetic wave with the second resonance splitting frequency output by the second filtering module 127 into an electromagnetic wave with the first resonance splitting frequency; the first superposition module is connected to the load, and the first superposition module is configured to superpose the electromagnetic wave with the first resonance splitting frequency output by the first filtering module 125 and the electromagnetic wave with the first resonance splitting frequency obtained by modulation by the first phase-locked loop module 128, and output the superposed electromagnetic wave to the load 122. Thus, the load 122 of the first electronic device is charged by the superimposed electromagnetic waves with an efficiency that is the sum of the efficiencies at the first and second resonance splitting frequencies, thereby increasing the charging rate of the individual electronic devices.
Please refer to fig. 5, which is a fourth schematic structural diagram of a wireless energy receiving apparatus according to an embodiment of the present application. As shown in fig. 5, in some embodiments of the present application, the wireless power receiving apparatus 20 further includes a second phase-locked loop module 128, a synthesizing module 129, and a third filtering module 130; the second phase-locked loop module 128 is configured to modulate a frequency of the electromagnetic wave output by the receiving coil 121, so that the frequency of the electromagnetic wave is shifted by a preset deviation frequency threshold, and the electromagnetic wave after frequency deviation is output, where the preset deviation frequency threshold may be a difference between a first resonance splitting frequency and a second resonance splitting frequency; the synthesizing module 129 is configured to synthesize the electromagnetic wave output by the receiving coil 121 and the frequency-shifted electromagnetic wave output by the second phase-locked loop module 128, and output an electromagnetic wave with at least three charging peak frequencies; the third filtering module 130 is connected to the load 122, and the third filtering module 130 is configured to filter other charging peak frequencies except for the target charging peak frequency in the electromagnetic waves output by the synthesizing module 129, and output the electromagnetic waves with the target charging peak frequency to the load 122. Therefore, the wireless power receiving device in the embodiment of the application can obtain the charging frequency signals of three wave crests, so that under the condition that a plurality of electronic devices are provided with the wireless power receiving device, the three charging wave crest frequencies can be used for charging the three electronic devices, and multiple electronic devices can be simultaneously charged.
Please refer to fig. 6, which is a fifth structural schematic diagram of a wireless energy receiving apparatus according to an embodiment of the present application. As shown in fig. 6, in some embodiments of the present application, based on the embodiment of fig. 5, the wireless power receiving apparatus 20 further includes a first switch 131, a second switch 132, a third switch 133, a fourth filtering module 134, a fifth filtering module 135, a sixth filtering module 136, a third phase-locked loop module 137, a second superimposing module (not shown in the figure), and a communication module 138, wherein an output end of the receiving coil 121 (the capacitance tuning module 123 may be disposed in the receiving coil 121) is connected to the first switch 131, the second switch 132, and the third switch 133, respectively; the fourth filtering module 134 is connected to the first switch 131, and the fourth filtering module 134 is configured to filter out other frequencies except for a target resonance splitting frequency in the electromagnetic waves received by the receiving coil 121, and output the electromagnetic waves at the target resonance splitting frequency to the load; the second switch 132 is further connected to the second phase-locked loop module 128 and the synthesizing module 129; the fifth filtering module 135 is connected to the third switch 133, and the fifth filtering module 135 is configured to filter a first resonance splitting frequency from the electromagnetic wave received by the receiving coil 121 and output an electromagnetic wave with a second resonance splitting frequency, where the resonance splitting frequency includes the first resonance splitting frequency and the second resonance splitting frequency; the sixth filtering module 136 is connected to the third switch 133, and the sixth filtering module 136 is configured to filter the second resonance splitting frequency in the electromagnetic wave received by the receiving coil 121, and output the electromagnetic wave with the first resonance splitting frequency; the third phase-locked loop module 137 is configured to modulate the electromagnetic wave with the second resonance splitting frequency output by the fifth filtering module 135 into an electromagnetic wave with the first resonance splitting frequency; the second superimposing module is connected to the load, and the second superimposing module is configured to superimpose the electromagnetic wave with the first resonance splitting frequency output by the sixth filtering module 136 and the electromagnetic wave with the first resonance splitting frequency obtained by modulation by the third phase-locked loop module 137, and output the superimposed electromagnetic wave to the load 122; the communication module 138 is configured to communicate with the wireless power transmitting apparatus, and obtain information about the number of electronic devices connected to the wireless power transmitting apparatus; the controller is further configured to control the switching states of the first switch, the second switch, and the third switch according to the quantity information acquired by the communication module.
Therefore, when the first electronic device is charged by using the wireless power transmitting device, the switch states of the first switch, the second switch and the third switch can be determined according to the number of the electronic devices currently connected by the wireless power transmitting device, that is, different charging schemes can be selected according to the difference of the number of the electronic devices currently connected by the wireless power transmitting device. Specifically, when the number of the electronic devices currently connected to the wireless power transmitting apparatus is one, that is, only the first electronic device is provided, the first switch and the second switch may be controlled to be turned on, and the third switch may be controlled to be turned off, so that the first electronic device charges the load by using the superimposed electromagnetic waves output by the second superimposing module, thereby effectively improving the charging efficiency. When the number of the electronic devices currently connected to the wireless power transmitting apparatus is two, that is, another electronic device is also charged through the wireless power transmitting apparatus in addition to the first electronic device, at this time, the second switch and the third switch may be controlled to be turned on, and the first switch may be controlled to be turned off, therefore, the first electronic device charges the load by using the electromagnetic wave of the target resonance splitting frequency output by the fourth filtering module, the target resonance splitting frequency is any one of the first resonance splitting frequency and the second resonance splitting frequency, and the other electronic device can be charged by using the other resonance splitting frequency except the target resonance splitting frequency, so that the two electronic devices can be charged simultaneously, and because both electronic devices operate at the resonance splitting frequency, the energy transfer efficiency of the system is highest. And under the condition that the number of the electronic devices currently connected to the wireless power transmitting device is three, that is, two other electronic devices are charged through the wireless power transmitting device in addition to the first electronic device, at this time, the first switch and the third switch may be controlled to be turned on, and the second switch is turned off, so that the first electronic device charges the load by using the electromagnetic wave of the target charging peak frequency output by the third filtering module, the target charging peak frequency is any one of the electromagnetic waves with at least three charging peak frequencies output by the synthesizing module, the two other electronic devices may be charged by using the electromagnetic waves of the two other charging peak frequencies except the target charging peak frequency, and at this time, the three electronic devices may be simultaneously charged.
In the embodiment of the application, the load is charged by utilizing the electromagnetic wave of the transmitting coil working under at least one resonance splitting frequency in the frequency splitting state, so that one wireless power transmitting device and a plurality of wireless power receiving devices are simultaneously connected and charged, the plurality of wireless power receiving devices are not interfered with each other, and the energy transmission efficiency is improved.
The wireless power receiving device in the embodiment of the application is applied to electronic equipment, and the electronic equipment can be mobile electronic equipment and also can be non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a Personal Computer (PC), a Television (TV), a teller machine, a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
Optionally, an embodiment of a second aspect of the present application provides a wireless charging system, including the wireless energy receiving apparatus described above.
Optionally, the wireless charging system further includes a wireless power transmitting device, and the wireless power transmitting device includes:
a transmitting coil for transmitting an electromagnetic wave;
the transmitting side capacitance tuning module is connected with the transmitting coil and used for tuning the transmitting coil under the condition that the distance between the receiving coil and the transmitting coil is changed, so that the resonance splitting frequency of the electromagnetic waves transmitted by the transmitting coil is kept constant. The specific structure and the working principle of the wireless charging system in the embodiment of the present application may refer to the above embodiments, and the same technical effects can be achieved, and are not repeated here to avoid repetition.
Optionally, an embodiment of the third aspect of the present application further provides an electronic device, where the electronic device includes the radio energy receiving apparatus according to the first aspect. For the specific structure and the working principle of the radio energy receiving device in the electronic device in the embodiment of the present application, reference may be made to the above-mentioned embodiments, and the same technical effects can be achieved.
It should be noted that the electronic device in the embodiment of the present application includes the mobile electronic device and the non-mobile electronic device described above.
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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (13)
1. A wireless power receiving device, comprising:
the receiving coil is used for coupling and receiving electromagnetic waves sent by a sending coil of the wireless power sending device, and the receiving coil is connected with a load;
and the controller is used for charging the load by using the electric energy of the electromagnetic wave at the at least one resonance splitting frequency received by the receiving coil under the condition that the transmitting coil works in the frequency splitting state.
2. The device of claim 1, wherein the transmitting coil operates in a frequency splitting state when a coupling coefficient between the receiving coil and the transmitting coil is greater than or equal to a preset coupling coefficient threshold.
3. The wireless power receiving apparatus according to claim 1, wherein the wireless power receiving apparatus is applied to a first electronic device, the wireless power transmitting apparatus is further connected to a second electronic device, the second electronic device can receive the electromagnetic wave transmitted by the wireless power transmitting apparatus and perform charging by using the received electromagnetic wave, and the wireless power receiving apparatus further comprises:
the frequency receiving module is used for receiving charging peak frequency information sent by the second electronic equipment, wherein the charging peak frequency information is peak frequency information of the second electronic equipment which is charged by using received electromagnetic waves;
and the crosstalk prompting module is used for displaying prompting information for prompting the distance or the approach of the load from the transmitting coil under the condition that the frequency difference value between the charging peak frequency of the load and the charging peak frequency of the second electronic equipment is smaller than a preset difference value.
4. The radio energy receiving apparatus of claim 1, further comprising:
the receiving side capacitance tuning module is connected with the receiving coil and used for tuning the receiving coil under the condition that the distance between the receiving coil and the transmitting coil is changed, so that the resonance splitting frequency of the electromagnetic waves received by the receiving coil is kept constant.
5. The radio energy receiving apparatus of claim 4, further comprising:
the frequency acquisition module is used for acquiring frequency information of the electromagnetic waves received by the receiving coil and transmitting the frequency information to the receiving side capacitance tuning module, and the receiving side capacitance tuning module can tune the receiving coil according to the frequency information, wherein the frequency information can represent the distance change between the receiving coil and the transmitting coil.
6. The radio energy receiving apparatus of claim 4, further comprising:
and the distance measuring module is used for acquiring distance information between the receiving coil and the transmitting coil and transmitting the distance information to the receiving side capacitance tuning module, and the receiving side capacitance tuning module can tune the receiving coil according to the distance information.
7. The wireless power receiving apparatus according to claim 1, wherein the resonance splitting frequency includes a first resonance splitting frequency and a second resonance splitting frequency, wherein the load is charged with power of an electromagnetic wave at the first resonance splitting frequency, the wireless power receiving apparatus further comprising:
and the first filtering module is used for filtering out the second resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves with the first resonance splitting frequency.
8. The radio energy receiving apparatus of claim 7, further comprising:
the second filtering module is used for filtering the first resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves of the second resonance splitting frequency;
the first phase-locked loop module is used for modulating the electromagnetic wave with the second resonance splitting frequency output by the second filtering module into the electromagnetic wave with the first resonance splitting frequency;
the first superposition module is connected with the load, and is used for superposing the electromagnetic wave with the first resonance splitting frequency output by the first filtering module and the electromagnetic wave with the first resonance splitting frequency obtained by modulation of the first phase-locked loop module, and outputting the superposed electromagnetic wave to the load.
9. The radio energy receiving apparatus of claim 1, further comprising:
the second phase-locked loop module is used for modulating the frequency of the electromagnetic wave output by the receiving coil, so that the frequency of the electromagnetic wave generates deviation of a preset deviation frequency threshold value, and the electromagnetic wave after frequency deviation is output;
the synthesis module is used for synthesizing the electromagnetic wave output by the receiving coil and the electromagnetic wave after frequency shift output by the second phase-locked loop module and outputting the electromagnetic wave with at least three charging wave peak frequencies;
and the third filtering module is connected with the load and used for filtering other charging peak frequencies except the target charging peak frequency in the electromagnetic waves output by the synthesis module and outputting the electromagnetic waves of the target charging peak frequency to the load.
10. The radio energy receiving apparatus of claim 9, further comprising:
the output end of the receiving coil is respectively connected with the first switch, the second switch and the third switch;
the fourth filtering module is connected with the first switch and is used for filtering other frequencies except the target resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves of the target resonance splitting frequency to the load;
the second switch is also connected with the second phase-locked loop module and the synthesis module;
a fifth filtering module, connected to the third switch, configured to filter a first resonance splitting frequency in the electromagnetic wave received by the receiving coil and output an electromagnetic wave with a second resonance splitting frequency, where the resonance splitting frequency includes the first resonance splitting frequency and the second resonance splitting frequency;
the sixth filtering module is connected with the third switch and is used for filtering out the second resonance splitting frequency in the electromagnetic waves received by the receiving coil and outputting the electromagnetic waves with the first resonance splitting frequency;
the third phase-locked loop module is used for modulating the electromagnetic wave with the second resonance splitting frequency output by the fifth filtering module into the electromagnetic wave with the first resonance splitting frequency;
the second superposition module is connected with the load, and is used for superposing the electromagnetic wave with the first resonance splitting frequency output by the sixth filtering module and the electromagnetic wave with the first resonance splitting frequency obtained by modulation of the third phase-locked loop module, and outputting the superposed electromagnetic wave to the load;
the communication module is used for communicating with the wireless power transmitting device and acquiring the quantity information of the electronic equipment connected with the wireless power transmitting device;
the controller is further configured to control the switching states of the first switch, the second switch, and the third switch according to the quantity information acquired by the communication module.
11. A wireless charging system comprising a wireless energy receiving device according to any one of claims 1-10.
12. The wireless charging system of claim 11, further comprising a wireless power transmitting device, the wireless power transmitting device comprising:
a transmitting coil for transmitting an electromagnetic wave;
the transmitting side capacitance tuning module is connected with the transmitting coil and used for tuning the transmitting coil under the condition that the distance between the receiving coil and the transmitting coil is changed, so that the resonance splitting frequency of the electromagnetic waves transmitted by the transmitting coil is kept constant.
13. An electronic device, characterized in that it comprises a radio energy receiving apparatus according to any of claims 1-10.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244580A1 (en) * | 2009-03-31 | 2010-09-30 | Fujitsu Limited | Wireless power supply apparatus |
| WO2013005415A1 (en) * | 2011-07-04 | 2013-01-10 | 日本電気株式会社 | Wireless power transmission device and method, and relay |
| WO2013051361A1 (en) * | 2011-10-07 | 2013-04-11 | 日立マクセルエナジー株式会社 | Wireless power transmission device and wireless power transmission method |
| CN104935090A (en) * | 2015-07-15 | 2015-09-23 | 中南大学 | Electric energy and signal synchronous transmission method based on frequency splitting in electric energy wireless transmission |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN106058826A (en) * | 2016-06-03 | 2016-10-26 | 南京南瑞继保电气有限公司 | Method for handling failure of alternating current side of invertor side of mixed-type direct current transmission system |
| CN108988506A (en) * | 2018-08-30 | 2018-12-11 | 西安交通大学 | A kind of symmetrical wireless power transmission circuit of PT and its building method |
| CN109698561A (en) * | 2019-01-11 | 2019-04-30 | 无锡职业技术学院 | A kind of MCR-WPT system overcoupling area transmissions efficient circuit analysis method |
| CN110098663A (en) * | 2019-05-20 | 2019-08-06 | 云南电网有限责任公司丽江供电局 | A kind of radio energy transmission system and configuration method of high pressure on-line monitoring equipment |
| CN111404288A (en) * | 2020-04-30 | 2020-07-10 | 维沃移动通信有限公司 | Wireless charging equipment |
-
2021
- 2021-03-31 CN CN202110347872.5A patent/CN113054759B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100244580A1 (en) * | 2009-03-31 | 2010-09-30 | Fujitsu Limited | Wireless power supply apparatus |
| WO2013005415A1 (en) * | 2011-07-04 | 2013-01-10 | 日本電気株式会社 | Wireless power transmission device and method, and relay |
| WO2013051361A1 (en) * | 2011-10-07 | 2013-04-11 | 日立マクセルエナジー株式会社 | Wireless power transmission device and wireless power transmission method |
| CN104935090A (en) * | 2015-07-15 | 2015-09-23 | 中南大学 | Electric energy and signal synchronous transmission method based on frequency splitting in electric energy wireless transmission |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN106058826A (en) * | 2016-06-03 | 2016-10-26 | 南京南瑞继保电气有限公司 | Method for handling failure of alternating current side of invertor side of mixed-type direct current transmission system |
| CN108988506A (en) * | 2018-08-30 | 2018-12-11 | 西安交通大学 | A kind of symmetrical wireless power transmission circuit of PT and its building method |
| CN109698561A (en) * | 2019-01-11 | 2019-04-30 | 无锡职业技术学院 | A kind of MCR-WPT system overcoupling area transmissions efficient circuit analysis method |
| CN110098663A (en) * | 2019-05-20 | 2019-08-06 | 云南电网有限责任公司丽江供电局 | A kind of radio energy transmission system and configuration method of high pressure on-line monitoring equipment |
| CN111404288A (en) * | 2020-04-30 | 2020-07-10 | 维沃移动通信有限公司 | Wireless charging equipment |
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|---|---|
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