CN110932417A - Wireless power receiving equipment, wireless charging equipment and system - Google Patents
Wireless power receiving equipment, wireless charging equipment and system Download PDFInfo
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- CN110932417A CN110932417A CN201811019473.0A CN201811019473A CN110932417A CN 110932417 A CN110932417 A CN 110932417A CN 201811019473 A CN201811019473 A CN 201811019473A CN 110932417 A CN110932417 A CN 110932417A
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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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Abstract
The disclosure discloses a wireless power receiving/charging device and a wireless power receiving/charging system, and belongs to the field of wireless charging. The wireless power receiving apparatus includes: n power receiving coils, a receiver, a charging management chip and a battery, wherein n is a positive integer greater than 1; the output ends of the n power receiving coils are connected with the input end of the receiver, the output end of the receiver is connected with the input end of the charging management chip, and the output end of the charging management chip is connected with the battery; the receiver is used for obtaining the power receiving proportion of the n power receiving coils, the power receiving proportion of the ith power receiving coil is related to the coupling coefficient between the charging coils, wherein i is more than or equal to 1 and less than or equal to n. Through setting up a plurality of receiving coils, when wireless receiving device was placed and is charged on wireless charging device, as long as need one of them receiving coil and charging coil to correspond, can charge to this wireless receiving device's battery, wireless receiving device effectively places the scope on wireless charging device great, and it is great to place the degree of freedom.
Description
Technical Field
The present disclosure relates to the field of wireless charging, and in particular, to a wireless powered device, a wireless charging device, and a system.
Background
The wireless charging technology is applied to charging of various mobile terminals such as mobile phones, tablets and notebook computers.
The related art provides a wireless charging technology, which includes a wireless charging device and a wireless powered device, wherein the wireless charging device includes a charging coil, and the wireless powered device includes a powered coil and a battery.
However, when wireless charging is carried out at present, because need place charging coil and receiving coil correspondence, when the position deviation between charging coil and the receiving coil is great, then can't continue to charge, wireless receiving device is less in the effective scope of placing on wireless charging device, and this effective scope of placing indicates the scope of placing that can realize wireless charging.
Disclosure of Invention
The present disclosure provides a wireless powered device, a wireless charging device and a system, which can solve the problem that the effective placement range of the wireless powered device on the wireless charging device is small. The technical scheme is as follows:
according to a first aspect of embodiments of the present disclosure, there is provided a wireless power receiving apparatus including: n power receiving coils, a receiver, a charging management chip and a battery, wherein n is a positive integer greater than 1;
the output ends of the n power receiving coils are connected with the input end of the receiver, the output end of the receiver is connected with the input end of the charging management chip, and the output end of the charging management chip is connected with the battery;
the receiver is used for obtaining the power receiving proportion of each power receiving coil in the n power receiving coils and setting the receiving power of the n power receiving coils according to the power receiving proportion, the power receiving proportion of the ith power receiving coil is related to the coupling coefficient between the ith power receiving coil and the charging coil in the wireless charging equipment, and i is more than or equal to 1 and less than or equal to n.
In an optional embodiment, the n power receiving coils are arranged in parallel in the same plane, and corresponding annular regions of each of the n power receiving coils do not overlap with each other.
In an optional embodiment, the receiver is further configured to turn off the ith power receiving coil when a power receiving ratio of the ith power receiving coil is smaller than a preset ratio.
In an optional embodiment, the receiver is further configured to obtain total received power of the n power receiving coils, and send a power adjustment signal to the wireless charging device according to the total received power, so as to control the total received power at a preset power.
In an alternative embodiment, coil detection and power distribution circuitry is included in the receiver;
the coil detection and power distribution circuit is configured to obtain the power reception ratio of each of the n power receiving coils, and set the reception power of the n power receiving coils according to the power reception ratio;
the coil detection and power distribution circuit is further configured to close the ith power receiving coil when the power receiving ratio of the ith power receiving coil is smaller than a preset ratio.
In an alternative embodiment, the receiver includes coil detection and power distribution circuitry, a microcontroller;
the coil detection and power distribution circuit is further configured to obtain total received power of the n powered coils;
the microcontroller is further configured to send a power adjustment signal to the wireless charging device according to the total received power, and control the total received power at a preset power.
In an optional embodiment, the wireless powered device further comprises a processor and a bluetooth transmission chip;
the processor is connected with the microcontroller, the Bluetooth transmission chip is connected with the processor, and the microcontroller is communicated with the Bluetooth transmission chip through the processor;
when wireless powered device with when adopting the magnetic resonance mode of charging to carry out wireless charging between the wireless charging device, microcontroller still is used for through bluetooth transmission chip to wireless charging device sends the power adjustment signal.
In an optional embodiment, when the wireless powered device and the wireless charging device are wirelessly charged by using a magnetic induction charging method, the receiver is further configured to determine, as a communication coil, a powered coil with a highest coupling coefficient with the charging coil among the n powered coils, and send the power adjustment signal to the wireless charging device through the communication coil in the form of an analog signal.
In an optional embodiment, when the magnetic resonance charging mode and the magnetic induction charging mode are simultaneously supported between the wireless powered device and the wireless charging device, the magnetic induction charging mode is used for wireless charging.
In an optional embodiment, the receiver is further configured to send a fast charging verification signal to the wireless charging device, where the fast charging verification signal is used to verify a fast charging right of the wireless powered device;
the receiver is further configured to receive a verification passing signal sent by the wireless charging device, where the verification passing signal is used to indicate that the wireless powered device has the fast charging right.
In an optional embodiment, the receiver is further configured to send a charging capability obtaining signal to the wireless charging device after receiving the verification passing signal, where the charging capability obtaining signal is used to obtain a maximum output power of a charger of the wireless charging device;
the receiver is further configured to set a maximum output voltage of the receiver according to the maximum output power;
the charging management chip is also used for dividing the ratio of the maximum output voltage to the value range according to the value range to which the maximum output voltage belongs to obtain the charging voltage;
the charging management chip is also used for charging the battery through the charging voltage.
In an optional embodiment, the receiver is further configured to obtain, by an automatic input current limiting manner, current capacities of the n power receiving coils at the maximum output voltage, and set the maximum output currents of the n power receiving coils according to the current capacities.
In an optional embodiment, the wireless powered device further includes a temperature sensor, the temperature sensor is disposed on the periphery of the battery, and the input end of the charge management chip is further connected to the temperature sensor;
the charging management chip is also used for adjusting the charging current corresponding to the charging voltage according to the temperature value acquired by the temperature sensor.
In an optional embodiment, the charging management chip is further configured to obtain a battery voltage of the battery;
the charging management chip is also used for adjusting the charging current corresponding to the charging voltage according to the battery voltage.
According to a second aspect of the embodiments of the present disclosure, there is provided a wireless charging apparatus including: the device comprises a charger, a transmitter, a controller and a charging coil;
the input end of the charger is used for being connected with an alternating current power supply, the output end of the charger is connected with the input end of the transmitter, the output end of the transmitter is connected with the charging coil, the control end of the transmitter is connected with the controller, and the controller is used for receiving communication information sent by wireless powered equipment and sending the communication information to the wireless powered equipment;
the charging coil is used for transmitting wireless charging energy to n receiving coils in the wireless receiving equipment, the power receiving proportion of the ith receiving coil in the n receiving coils is related to the coupling coefficient between the ith receiving coil and the charging coil, wherein i is greater than or equal to 1 and less than or equal to n.
According to a third aspect of embodiments of the present disclosure, there is provided a wireless charging system, wherein the wireless charging system comprises a wireless charging device and a wireless powered device, the wireless powered device comprising the device according to any one of claims 1 to 11, and the wireless charging device comprising the device according to claim 12.
In an optional embodiment, the wireless powered device is a mobile terminal device or a wearable device, and the wireless charging device is a charging cradle.
The technical scheme provided by the embodiment of the disclosure at least comprises the following beneficial effects:
through setting up a plurality of receiving coils, when wireless receiving device was placed and is charged on wireless charging device, as long as need one of them receiving coil and charging coil to correspond, can charge to this wireless receiving device's battery, wireless receiving device effectively places the scope on wireless charging device great, and it is great to place the degree of freedom.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram illustrating a structure of a wireless power receiving apparatus according to an exemplary embodiment;
fig. 2 is a schematic diagram illustrating a positional relationship between a power receiving coil and a charging coil according to an exemplary embodiment;
fig. 3 is a block diagram illustrating a structure of a wireless power receiving apparatus according to another exemplary embodiment;
fig. 4 is a block diagram illustrating the structure of a wireless charging device according to an exemplary embodiment;
fig. 5 is a block diagram illustrating a wireless charging system in accordance with an exemplary embodiment;
fig. 6 is a block diagram illustrating a wireless charging system in accordance with another exemplary embodiment;
FIG. 7 is a flow chart illustrating a wireless charging method in accordance with an exemplary embodiment;
fig. 8 is a flow chart illustrating a wireless charging method according to another example embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Fig. 1 is a block diagram illustrating a structure of a wireless power receiving apparatus according to an exemplary embodiment. As shown in fig. 1, the wireless power receiving apparatus 11 includes: a power receiving coil 111, a receiver 112, a charge management chip 113, and a battery 114.
The wireless power receiving apparatus 11 is an electronic apparatus capable of being charged by a wireless charging technique. The wireless powered device 11 may be a mobile terminal device, such as: cell-phone, flat board, portable notebook computer etc. also can be wearable equipment, like: intelligent bracelet.
Alternatively, the wireless power receiving apparatus 11 includes n power receiving coils 111, where n is a positive integer greater than 1, and schematically, as shown in fig. 1, the wireless power receiving apparatus 11 includes three power receiving coils 111, and the wireless power receiving apparatus 11 includes a power receiving coil 1111, a power receiving coil 1112, and a power receiving coil 1113.
It should be noted that, in the embodiment of the present disclosure, the number of the power receiving coils is illustrated as three, and in actual operation, the number of the power receiving coils may also be 2 or more, which is not limited in the embodiment of the present disclosure.
Alternatively, the n power receiving coils 111 are arranged in parallel in the same plane in the wireless power receiving apparatus 11 when arranged, and the annular regions corresponding to each of the n power receiving coils do not overlap with each other.
Illustratively, as shown in fig. 2, the power receiving coil 1111, the power receiving coil 1112 and the power receiving coil 1113 are arranged in parallel in the same plane in the wireless power receiving device 11, and the loop areas of the three power receiving coils do not overlap with each other, in fig. 2, the three power receiving coils are illustrated as being arranged in a triangle, in actual operation, the n power receiving coils may also be arranged in a straight line, in a fixed shape or in an arbitrary arrangement in the same plane, which is not limited by the embodiment of the present disclosure.
The output terminal 115 of the power receiving coil 1111 is connected to the input terminal of the receiver 112, the output terminal 116 of the power receiving coil 1112 is connected to the input terminal of the receiver 112, the output terminal 117 of the power receiving coil 1113 is connected to the input terminal of the receiver 112, the output terminal 118 of the receiver 112 is connected to the input terminal 119 of the charging management chip 113, and the output terminal 120 of the charging management chip 113 is connected to the battery 114.
The power receiving coil 111 is a coil for receiving wireless charging energy, which may be simply referred to as "energy". Alternatively, the power receiving coil 111 may be a coupling coil capable of generating magnetic coupling, a coupling coil capable of generating electric field coupling, or a coil capable of receiving radio waves, which is not limited in the present disclosure. The energy received by the power receiving coil 111 includes but is not limited to: energy in the form of electromagnetic waves, microwaves, and the like.
Alternatively, when the wireless power receiving apparatus 11 performs wireless charging, the wireless power receiving apparatus 11 is placed on the wireless charging apparatus, and when the power receiving coil 111 of the wireless power receiving apparatus 11 corresponds to the charging coil of the wireless charging apparatus, the power receiving coil 111 receives wireless charging energy transmitted by the charging coil and outputs the wireless charging energy to the receiver 112 as electric energy, wherein, taking the power receiving coil 111 in fig. 1 as an example, the power receiving coil 1111, the power receiving coil 1112, and the power receiving coil 1113 are different from each other in relative positions with respect to the charging coil when placed, and different in coupling capability to the wireless charging energy, so that the received power at the time of receiving the wireless charging energy is different between the power receiving coils 111. That is, when there are n power receiving coils 111, the power receiving ratio of the i-th power receiving coil is related to the coupling coefficient between the i-th power receiving coil and the charging coil in the wireless charging device, n is a positive integer greater than 1, and i is greater than or equal to 1 and less than or equal to n.
The charging management chip 113 is a chip having functions of converting, distributing, detecting, and the like of input electric energy, and optionally, the charging management chip 113 in the present disclosure may be used to charge the battery 114 according to a charging voltage and a charging current.
The wireless power receiving coil 111, the receiver 112, the charging management chip 113 and the battery 114 may be implemented separately as a plurality of circuits, or may be combined with each other to form a chip.
Fig. 3 is a block diagram showing the structure of a wireless power receiving apparatus 21 according to another exemplary embodiment. As shown in fig. 3, the wireless powered device 21 is added with a temperature sensor 115 to the wireless powered device 11 shown in fig. 1, and the receiver 112 includes a coil detection and power distribution circuit 1121, a rectifying circuit 1122, a modulation circuit 1123, and a microcontroller 1124.
Wherein, the temperature sensor 115 is disposed on the peripheral side of the battery 114, and the temperature sensor 115 is used for collecting the temperature value on the peripheral side of the battery, optionally, the temperature value collected by the temperature sensor 115 is the temperature value of the heat released by the battery 114.
Alternatively, the coil detection and power distribution circuit 1121 is configured to implement the detection of the power reception ratio of each power receiving coil 111 in the power receiving coils 111 implemented by the receiver 112 described above, and set the reception power of each power receiving coil 111 according to the power reception ratio; optionally, the coil detection and power distribution circuit is also used to control the total received power of the powered coil 111.
Alternatively, the coil detection and power distribution circuit 1121 is configured to acquire a power reception ratio of each power receiving coil 111 in the power receiving coils 111, and set the reception power of each power receiving coil 111 according to the power reception ratio.
Optionally, the coil detection and power distribution circuit 1121 is further configured to acquire the total received power of the power receiving coil 111, and control the total received power at a preset power by the microcontroller 1124 sending a power adjustment signal to the wireless charging device according to the total received power. Referring to fig. 2, as shown in fig. 2, the wireless power receiving device 11 includes a power receiving coil 1111, a power receiving coil 1112, and a power receiving coil 1113, the wireless charging device 12 includes a charging coil 123, most of the power receiving coil 1111 corresponds to the charging coil 123, all of the power receiving coil 1112 corresponds to the charging coil 123, and a small part of the power receiving coil 1113 corresponds to the charging coil 123, so that the coupling coefficients of the power receiving coil 111 and the charging coil 123 are, from high to low, the power receiving coil 1112, the power receiving coil 1111, and the power receiving coil 1113, when receiving the wireless charging energy, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, the received power of the power receiving coil 1113 is 0.2w, the total received power is 2.9w, the receiver 112 needs to control the total received power to be 5w, the receiver 112, through the microcontroller 1124, sends a power adjustment signal to the wireless charging device instructing the wireless charging device to continue to increase the output power.
Optionally, the coil detection and power distribution circuit 1121 is further configured to turn off the ith power receiving coil 111 when the power receiving ratio of the ith power receiving coil is smaller than a preset ratio, wherein 1 ≦ i ≦ n. Illustratively, the predetermined ratio is 10%, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, the received power of the power receiving coil 1113 is 0.2w, and the received power of the power receiving coil 1113 accounts for 6.9% of the total received power, so that the power receiving coil 1113 is turned off, i.e., the power receiving coil 1113 is stopped from continuing to couple the wireless charging energy.
The rectifying circuit 1122 is used to convert the ac power signal received by the receiver 112 into a dc power signal, i.e., convert the ac power received by the receiver 112 into dc power.
The modulation circuit 1123 is configured to modulate a signal, which is a communication signal transmitted from the wireless power receiving apparatus 21 to the wireless charging apparatus, and the modulation circuit 1123 is configured to modulate the power adjustment signal and transmit the power transmission signal to the wireless charging apparatus after modulation is completed.
A Microcontroller (MCU) 1124 is configured to demodulate and communicate a signal, which is a communication signal transmitted from the wireless charging apparatus to the wireless powered apparatus 21. Alternatively, the microcontroller may be a single chip microcomputer.
Fig. 4 is a block diagram illustrating a configuration of a wireless charging device 12 according to an exemplary embodiment. As shown in fig. 4, the wireless charging device 12 includes: a charger 121, a transmitter (transmitter) 122 charging a coil 123, and a controller 124.
The input terminal of the charger 121 is connected to a power supply (not shown), the output terminal 1211 of the charger 121 is connected to the input terminal 1212 of the transmitter 122, the output terminal of the transmitter 122 is connected to the input terminal 1214 of the charging coil 123, and the control terminal 1213 of the transmitter 122 is connected to the controller 124.
Alternatively, the charger 121 may be a general DCP (dedicated charging port) charger, a QC2.0(Quick Charge) charger, a QC3.0 charger, a QC4.0 charger, a PD (Quick Charge) charger, or the like.
The transmitter 122 includes a Full-Bridge inverter circuit or a half-Bridge inverter circuit (translated: Full Bridge) for converting the dc power into ac power and converting the ac power into wireless charging energy through the charging coil 123 to charge the wireless powered device 11, and optionally, the wireless charging device 12 further includes a capacitor 125, and the capacitor 125 is combined with the charging coil 123 to convert the ac power into wireless charging energy to charge the wireless powered device 11.
The controller 124 is configured to control the full-bridge inverter circuit or the half-bridge inverter circuit, and modulate and demodulate a signal, that is, the controller 124 is configured to modulate a signal, transmit the signal to the wireless power receiving apparatus 11, and demodulate a received signal transmitted by the wireless power receiving apparatus 11.
The charging coil 123 is a coil for transmitting wireless charging energy, and/or a coil for receiving communication signals. Alternatively, the charging coil 123 may be a coupling coil capable of generating magnetic coupling, a coupling coil capable of generating electric field coupling, or a coil capable of sending radio waves, which is not limited in this disclosure. The energy transmitted by the charging coil 123 may be energy in the form of electromagnetic waves, microwaves, and the like.
The transmitter 122, the charging coil 123 and the controller 124 may be implemented separately as a plurality of circuits, or may be combined with each other to form a chip.
Fig. 5 is a block diagram illustrating a wireless charging system in accordance with an example embodiment. As shown in fig. 5, the wireless charging system includes: the wireless charging device 12 includes a wireless power receiving device 11 and a wireless charging device 12, wherein a power receiving coil 111 in the wireless power receiving device 11 is disposed opposite to a charging coil 122 in the wireless charging device 12, and energy is exchanged between the two through an electric field and/or a magnetic field.
Illustratively, the wireless charging device 12 may send energy to the power receiving coil 111 of the wireless power receiving device 11 through the charging coil 122, and/or a communication signal may be transferred between the power receiving coil 111 of the wireless power receiving device 11 and the charging coil 122 of the wireless charging device 12.
Alternatively, when the wireless charging device 12 charges the wireless power receiving device 11, the wireless power receiving device 11 and the wireless charging device 12 may be wirelessly charged by using a magnetic resonance charging method, or wirelessly charged by using a magnetic induction method.
Optionally, the wireless powered device 11 further includes a processor and a bluetooth transmission chip, the processor is connected to the microcontroller 1124, the processor is connected to the bluetooth transmission chip, the microcontroller and the bluetooth transmission chip communicate with each other through the processor, and when the wireless powered device 11 and the wireless charging device 12 are wirelessly charged in a magnetic resonance charging manner (that is, a charging protocol used between the wireless powered device 11 and the wireless charging device 12 is an A4WP protocol), the receiver 112 in the wireless powered device 11 is further configured to send a communication signal to the wireless charging device 12 through the bluetooth transmission chip, where the communication signal includes at least one of a power adjustment signal, a fast charging verification signal, and a charging capability acquisition signal.
Alternatively, when the wireless powered device 11 and the wireless charging device 12 are charged by magnetic induction (i.e. the charging protocol used between the wireless powered device 11 and the wireless charging device 12 is QI protocol), the receiver 112 of the wireless powered device 11 is further configured to determine a powered coil with the highest coupling coefficient between one of the powered coils 111 and the charging coil 123 as a communication coil, and transmit the communication signal to the wireless charging device 12 through the communication coil in the form of an analog signal. As shown in fig. 2, most of the power receiving coil 1111 corresponds to the charging coil 123, all of the power receiving coil 1112 corresponds to the charging coil 123, and a small part of the power receiving coil 1113 corresponds to the charging coil 123, so that the coupling coefficients of the power receiving coil 111 and the charging coil 123 are the power receiving coil 1112, the power receiving coil 1111, and the power receiving coil 1113, respectively, from high to low, and the power receiving coil 1112 is used as a communication coil for communicating with the wireless charging device 12.
Optionally, the communication coil is also used for receiving a communication signal transmitted by the wireless charging device 12. Alternatively, the communication signal transmitted by the wireless power receiving apparatus 11 to the wireless charging apparatus 12 is an ASK (Amplitude Shift Keying) signal, and the communication signal transmitted by the wireless charging apparatus 12 to the wireless power receiving apparatus 11 is an FSK (Frequency-Shift Keying) signal.
It is to be noted that when the wireless power receiving apparatus 11 and the wireless charging apparatus 12 support both the magnetic resonance charging method and the magnetic induction charging method, the magnetic induction charging method is used for charging.
Alternatively, the wireless powered device 11 may also increase the charging efficiency of the battery by increasing the total received power, thereby achieving a quick charge.
Optionally, the receiver 112 is further configured to send, through the microcontroller 1124, a fast charging verification signal to the wireless charging apparatus, where the fast charging verification signal is used to verify the fast charging authority of the wireless powered apparatus 11, and the wireless charging apparatus 12 demodulates, through the controller 124, the fast charging authority of the wireless powered apparatus 11 according to the fast charging verification signal. Optionally, the fast charging right may be verified in a password verification manner, or may be verified in a registration manner. The password verification mode is that the fast charging verification signal carries a password corresponding to the fast charging authority, the wireless charging device 12 verifies the password after receiving the fast charging verification signal, and when the password verification is successful, the wireless receiving device 11 has the fast charging authority, modulates the verification passing signal and sends the modulated verification passing signal to the wireless receiving device 11; the registration mode is that the wireless powered device 11 registers a fast charging authority in the wireless charging device 12 in advance, a fast charging identifier of the wireless powered device 11 is stored in the wireless charging device 12, a fast charging verification signal sent by the wireless powered device 11 to the wireless charging device 12 includes the fast charging identifier, the wireless charging device 12 matches the fast charging identifier with the stored fast charging identifier after receiving the fast charging verification signal, when the matching result shows that the fast charging identifier matches the stored fast charging identifier, the wireless powered device 11 has the fast charging authority, modulates a verification passing signal and sends the modulated signal to the wireless powered device 11, and the receiver 112 of the wireless powered device 11 receives the verification passing signal sent by the wireless charging device 12 through the microcontroller 1124, where the verification passing signal is used for indicating that the wireless powered device 11 has the fast charging authority.
It should be noted that, in the embodiment of the present disclosure, a password authentication manner and a registration authentication manner are taken as examples for description, and in actual operation, there may be more ways to authenticate the fast charging authority of the wireless power receiving apparatus 11, which is not limited in the embodiment of the present disclosure.
Optionally, the receiver is further configured to send a charging capability obtaining signal to the wireless charging device 12 after receiving the verification passing signal, wherein the charging capability obtaining signal is used for obtaining the maximum output power of the charger 121 of the wireless charging device 12. Illustratively, the maximum output power of the charger 121 is 5.5w, since there is a certain energy loss when the wireless charging energy of the charging coil 123 is transmitted to the receiving coil 111, taking 10% as an example, the maximum output power of the wireless charging device is about 5 w.
Optionally, the receiver 112 is further configured to set a maximum output voltage of the receiver according to the maximum output power. And outputs the maximum output voltage to the charge management chip 113. Optionally, the charging management chip 113 divides the ratio between the maximum output voltage and the value range according to the received value range to which the maximum output voltage output by the receiver 112 belongs, so as to obtain a charging voltage, and the charging management chip 113 charges the battery through the charging voltage.
Illustratively, the maximum output voltage (denoted by Vrect) of the receiver 112 and the operation mode of the charge management chip include the following corresponding cases:
1. when the Vrect is more than or equal to 5V and is less than 10V, the charging management chip 113 charges the battery in a common voltage reduction mode (the Vrect is divided by 1);
2. the Vrect is more than or equal to 10V and is less than 15V, the charging management chip 113 divides the Vrect and 2, and charges the battery through the divided voltage;
3. the Vrect is more than or equal to 15V and is less than 20V, the charging management chip 113 divides the Vrect and 3, and charges the battery through the divided voltage;
4. when Vrect is higher, analogize to the ratio corresponding to case 1 to case 3.
Optionally, the microcontroller 1124 of the receiver 112 is further configured to obtain a current capability of the power receiving coil 111 at the maximum output voltage by an AICL (Auto Input current limited) manner, and set the maximum output current of the power receiving coil 111 according to the current capability.
Fig. 6 is a block diagram illustrating a wireless charging system in accordance with another example embodiment. As shown in fig. 6, the wireless charging system includes: compared to the wireless power receiving apparatus 11 shown in fig. 5, the wireless power receiving apparatus 21 and the wireless charging apparatus 12 are provided with a temperature sensor 115 in the wireless power receiving apparatus 21, and the receiver 112 includes a coil detection and power distribution circuit 1121, a rectifier circuit 1122, a modulation circuit 1123, and a microcontroller 1124.
Wherein, the temperature sensor 115 is disposed on the peripheral side of the battery 114, and the temperature sensor 115 is used for collecting the temperature value on the peripheral side of the battery, optionally, the temperature value collected by the temperature sensor 115 is the temperature value of the heat released by the battery 114.
Alternatively, the functions implemented by the wireless power receiving apparatus 11 in fig. 5 described above may be implemented by the wireless power receiving apparatus 21 shown in fig. 6.
Optionally, the charging management chip 113 is further configured to adjust a charging current corresponding to the charging voltage according to the temperature value collected by the temperature sensor 115.
Schematically, at low temperatures below TcoldNormal temperature is TcoolTo TwarmHigh temperature is higher than ThotFor example, the temperature value collected by the temperature sensor 115 is T, when T iscool<T<TwarmThen the normal charging current is maintained, when Tcold<T<TcoolOr Twarm<T<ThotThen, the charging current is reduced by taking the preset proportion P as a reduction proportion, and when T is reached<TcoldOr T>ThotThe charging current is reduced to 0A.
Optionally, the charging management chip 113 is further configured to obtain a battery voltage of the battery 114, and adjust a charging current corresponding to the charging voltage according to the battery voltage.
Fig. 7 is a flow chart illustrating a wireless charging method according to an example embodiment. The wireless charging method is applied to the wireless charging system shown in fig. 5, as shown in fig. 7:
in step 701, a receiver obtains a power receiving ratio of each power receiving coil in n power receiving coils, where n is a positive integer greater than 1.
Optionally, the power acceptance ratio is related to a coupling coefficient between each power receiving coil and a charging coil in the wireless charging device.
Illustratively, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, and the received power of the power receiving coil 1113 is 0.2w, so the power receiving ratio of the power receiving coil 1111 is about 41%, the power receiving ratio of the power receiving coil 1112 is about 52%, and the power receiving ratio of the power receiving coil 1113 is about 6.9%, so the coupling coefficient between the power receiving coil 1112 and the charging coil is the highest, and the coupling coefficient between the power receiving coil 1111 and the charging coil is the second lowest, and the coupling coefficient between the power receiving coil 1113 and the charging coil is the lowest.
And 702, when the power receiving proportion of the ith receiving coil is smaller than a preset proportion, closing the ith receiving coil, wherein i is larger than or equal to 1 and smaller than or equal to n.
Illustratively, the predetermined ratio is 10%, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, the received power of the power receiving coil 1113 is 0.2w, and the power receiving coil 1113 is turned off because the power receiving ratio of the power receiving coil 1113 is about 6.9%, i.e., the power receiving coil 1113 is stopped from continuing to couple wireless charging energy.
In step 703, the receiver obtains the total received power of the n power receiving coils.
Alternatively, when the i-th power receiving coil of the n power receiving coils is turned off, the received power of the i-th power receiving coil is regarded as 0, and illustratively, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, the received power of the power receiving coil 1113 is 0.2w, and since the power receiving ratio of the power receiving coil 1113 is about 6.9%, the total received power of the three power receiving coils is 2.7w when the power receiving coil 1113 is turned off.
In step 704, the receiver sends a power adjustment signal to the wireless charging device according to the total received power.
Optionally, the power adjustment signal is used to adjust the total received power at a preset power, illustratively, the preset power is 5w, and the current total received power reaches 5.2w, then the receiver sends the power adjustment signal to the wireless charging device to reduce the output power of the wireless charging device, so as to reduce the total received power of the wireless powered device to 5 w.
Step 705, the wireless charging device adjusts output power according to the power adjustment signal.
Optionally, the power adjustment signal may be used to adjust the output power of the wireless charging device to be low, or to adjust the output power of the wireless charging device to be low. Illustratively, when the adjustment flag included in the power adjustment signal is 1, the receiver indicates that the wireless charging device adjusts the output power to be high, and when the adjustment flag included in the power adjustment signal is 0, the receiver indicates that the wireless charging device adjusts the output power to be low. Optionally, when the wireless charging device adjusts the output power, the wireless charging device may adjust the output power at a preset ratio each time, or adjust the output power at a preset power difference each time.
Schematically, when the output power is increased by 10% in a preset proportion and the kth output power is 3w, the kth +1 output power is 3.3w, and the kth +2 output power is 3.63 w; when the output power is increased by 0.5w of the preset power difference value, the k +1 time output power is 3.5w and the k +2 time output power is 4w when the k time output power is 3 w.
In step 706, the receiver outputs a charging voltage to the charging management chip according to the total received power.
Alternatively, the receiver may output the charging voltage to the charging management chip after the total received power is stabilized at the preset power, or may output the charging voltage to the charging management chip immediately after the reception of the power is started.
In step 707, the charging management chip charges the battery with a charging voltage.
Optionally, the charging voltage is a charging voltage when the total received power of the receiver is maintained at a preset power.
Optionally, the system power supply may be directly supplied through the charging management chip, or may be discharged while the battery is charged, so as to realize the system power supply.
To sum up, through setting up a plurality of receiving coils, when wireless receiving device was placed and is charged on wireless charging device, as long as need one of them receiving coil and charging coil to correspond, can charge to this wireless receiving device's battery, wireless receiving device is great in the effective scope of placing on wireless charging device, and it is great to place the degree of freedom.
Alternatively, as the number of power receiving coils in the wireless power receiving apparatus increases, the total receiving power of the wireless power receiving apparatus also increases accordingly, and the coil heating phenomenon caused by the increase of the receiving power of a single wireless power receiving coil is avoided, as shown in fig. 8, where fig. 8 is a flowchart of a wireless charging method according to an exemplary embodiment. The wireless charging method is applied to the wireless charging system shown in fig. 6 as an example, and the method includes:
step 801, the wireless charging device sends a detection energy signal through a charging coil.
Optionally, the detection energy signal is used to detect whether a wireless powered device is placed on the wireless charging device. Optionally, the detection energy signal is a shorter duration energy signal. Illustratively, the probe energy signal is in the form of an analog ping or a short beacon.
Step 802, when the wireless charging device detects that the wireless powered device is within the charging range, the wireless charging device transmits wireless charging energy to the wireless powered device through the charging coil.
Alternatively, the wireless charging device may determine that the wireless powered device is in the charging range after receiving the feedback signal of the wireless powered device, or may determine that the wireless powered device is in the charging range after detecting that the probe energy signal is received by the wireless powered device.
In step 803, the wireless power receiving apparatus receives wireless charging energy through the n power receiving coils.
Optionally, the power acceptance ratio is related to a coupling coefficient between each power receiving coil and a charging coil in the wireless charging device.
In step 804, the receiver obtains the total received power of the n power receiving coils.
Optionally, the receiver obtains the total received power of the n powered coils through the coil detection and power distribution circuit.
Alternatively, when the i-th power receiving coil of the n power receiving coils is turned off, the received power of the i-th power receiving coil is regarded as 0, and illustratively, the received power of the power receiving coil 1111 is 1.2w, the received power of the power receiving coil 1112 is 1.5w, the received power of the power receiving coil 1113 is 0.2w, and since the power receiving ratio of the power receiving coil 1113 is about 6.9%, the total received power of the three power receiving coils is 2.7w when the power receiving coil 1113 is turned off.
In step 805, the receiver sends a power adjustment signal to the wireless charging device according to the total received power.
Optionally, the receiver further includes a microcontroller, the microcontroller has a communication function, and the receiver sends the power adjustment signal to the wireless charging device through the microcontroller.
Optionally, the power adjustment signal is used to adjust the total received power at a preset power, illustratively, the preset power is 5w, and the current total received power reaches 5.2w, then the receiver sends the power adjustment signal to the wireless charging device to reduce the output power of the wireless charging device, so as to reduce the total received power of the wireless powered device to 5 w.
In step 806, the wireless charging device adjusts the output power according to the power adjustment signal.
Optionally, the power adjustment signal may be used to adjust the output power of the wireless charging device to be low, or to adjust the output power of the wireless charging device to be low. Illustratively, when the adjustment flag included in the power adjustment signal is 1, the receiver indicates that the wireless charging device adjusts the output power to be high, and when the adjustment flag included in the power adjustment signal is 0, the receiver indicates that the wireless charging device adjusts the output power to be low. Optionally, when the wireless charging device adjusts the output power, the wireless charging device may adjust the output power at a preset ratio each time, or adjust the output power at a preset power difference each time.
Schematically, when the output power is increased by 10% in a preset proportion and the kth output power is 3w, the kth +1 output power is 3.3w, and the kth +2 output power is 3.63 w; when the output power is increased by 0.5w of the preset power difference value, the k +1 time output power is 3.5w and the k +2 time output power is 4w when the k time output power is 3 w.
In step 807, the receiver outputs a charging voltage to the charging management chip according to the total received power.
Optionally, the receiver further includes a rectifier circuit, and the rectifier circuit converts the alternating current into the direct current and outputs the charging voltage to the charging management chip.
Alternatively, the receiver may output the charging voltage to the charging management chip after the total received power is stabilized at the preset power, or may output the charging voltage to the charging management chip immediately after the reception of the power is started.
Step 808, the charging management chip charges the battery with the charging voltage.
Optionally, the charging voltage is a charging voltage when the total received power of the receiver is maintained at a preset power.
Step 809, the receiver sends a fast charging verification signal to the wireless charging device.
Optionally, the receiver sends a fast charging verification signal to the wireless charging device through the microcontroller.
Optionally, the fast charge verification signal is used to verify the fast charge authority of the wireless powered device.
Optionally, the receiver further includes a modulation circuit, the modulation circuit modulates the fast charging verification signal, and sends the modulated fast charging verification signal to the wireless charging device through the microcontroller.
In step 810, the controller receives a fast charging verification signal sent by the wireless powered device.
Optionally, the controller demodulates the fast charging verification signal, and verifies the fast charging right of the wireless powered device according to the demodulated fast charging verification signal.
In step 811, the controller verifies the fast charging authority of the wireless powered device.
Optionally, the fast charging right may be verified in a password verification manner, or may be verified in a registration manner.
The password verification mode is that the fast charging verification signal carries a password corresponding to the fast charging authority, the controller verifies the password after receiving the fast charging verification signal, and when the password verification is successful, the wireless power receiving equipment has the fast charging authority; the registration mode refers to that the wireless powered device registers a fast charging authority in the wireless charging device in advance, the wireless charging device stores a fast charging identifier of the wireless powered device, the fast charging verification signal sent by the wireless powered device to the wireless charging device comprises the fast charging identifier, the wireless charging device matches the fast charging identifier with the stored fast charging identifier after receiving the fast charging verification signal, and when the matching result shows that the fast charging identifier is matched with the stored fast charging identifier, the wireless powered device has the fast charging authority.
In step 812, the controller sends a verification pass signal to the wireless powered device when the verification passes.
Optionally, the verification passing signal is used to indicate that the wireless powered device has a fast charging right.
Optionally, the controller modulates the verification-passing signal and transmits the modulated verification-passing signal to the wireless powered device.
In step 813, the receiver receives a verification pass signal sent by the wireless charging device.
Optionally, the receiver demodulates the verification-passed signal through the microcontroller, and determines that the wireless powered device has the fast-charging right through the demodulated verification-passed signal.
In step 814, the receiver sends a charging capability acquisition signal to the wireless charging device.
Optionally, the charging capability acquisition signal is used for acquiring the maximum output power of a charger of the wireless pet drowning device.
Optionally, the receiver sends the charging capability acquisition signal to the wireless charging device through the microcontroller.
In step 815, the controller receives a charging capability acquisition signal transmitted by the wireless powered device.
In step 816, the controller sends the maximum output power of the charger to the wireless powered device according to the charging capability acquisition signal.
In step 817, the receiver receives the maximum output power transmitted by the wireless charging device.
Optionally, the receiver receives, through the microcontroller, the maximum output power transmitted by the wireless charging device.
In step 818, the receiver sets the maximum output voltage of the receiver according to the maximum output power.
Optionally, the receiver sets the maximum output voltage of the receiver by a microcontroller.
Optionally, the receiver may calculate the maximum output voltage corresponding to the maximum output power according to a preset formula, or may prestore a corresponding relationship between the maximum output power and the maximum output voltage. When the receiver calculates the maximum output voltage through a preset formula, the maximum output power is used as a known parameter to be input into the formula and output to obtain the voltage value of the maximum output voltage.
When the receiver determines the maximum output voltage according to the corresponding relationship between the maximum output power and the maximum output voltage, the receiver may search the maximum output power in the stored corresponding relationship, and obtain the value of the maximum output voltage corresponding to the maximum output power.
Step 819, the receiver outputs the maximum output voltage to the charge management chip.
In step 820, the charging management chip divides the ratio of the maximum output voltage to the value range according to the value range to which the maximum output voltage belongs, so as to obtain the charging voltage.
Illustratively, the maximum output voltage (denoted by Vrect) of the receiver and the operation mode of the charge management chip include the following corresponding cases:
1. the Vrect is more than or equal to 5V and less than 10V, and the charging management chip charges the battery in a common voltage reduction mode (the Vrect is divided by 1);
2. the Vrect is more than or equal to 10V and is less than 15V, the charging management chip divides the Vrect and 2, and the battery is charged through the divided voltage;
3. the Vrect is more than or equal to 15V and is less than 20V, the charging management chip divides the Vrect and 3, and the battery is charged through the divided voltage;
4. when Vrect is higher, analogize to the ratio corresponding to case 1 to case 3.
Optionally, the receiver is further configured to obtain a Current capability of the power receiving coil at the maximum output voltage by an AICL (automatic Input Current Limited) manner, and set the maximum output Current of the power receiving coil according to the Current capability.
In step 821, the charging management chip charges the battery with the charging voltage.
Optionally, the charging voltage is a charging voltage corresponding to a maximum output power.
Step 822, the temperature sensor collects a temperature value.
Optionally, the temperature sensor is disposed on the periphery of the battery, and the input end of the charge management chip is further connected to the temperature sensor. The temperature value collected by the temperature sensor is the temperature value of the heat released by the battery.
In step 823, the temperature sensor sends the temperature value to the charge management chip.
Step 824, the charging management chip adjusts the charging current corresponding to the charging voltage according to the temperature value collected by the temperature sensor.
Schematically, at low temperatures below TcoldNormal temperature is TcoolTo TwarmHigh temperature is higher than ThotFor example, the temperature value collected by the temperature sensor 115 is T, when T iscool<T<TwarmThen the normal charging current is maintained, when Tcold<T<TcoolOr Twarm<T<ThotThen, the charging current is reduced by taking the preset proportion P as a reduction proportion, and when T is reached<TcoldOr T>ThotThe charging current is reduced to 0A.
In step 825, the charge management chip obtains the battery voltage of the battery.
In step 826, the charging management chip adjusts the charging current corresponding to the charging voltage according to the battery voltage.
Illustratively, the cell voltage is too low to be below VlowThe battery voltage is normally VlowTo VhighIn between, the battery voltage is too high to be higher than VhighFor example, the cell voltage is actually V, when Vlow<V<VhighThen the normal charging current is maintained, when V<VlowOr V>VhighThe charging current is reduced to 0A.
To sum up, according to the wireless charging method provided by the embodiment of the present disclosure, by providing the plurality of power receiving coils, when the wireless power receiving device is placed on the wireless charging device for charging, the battery of the wireless power receiving device can be charged only by one of the power receiving coils corresponding to the charging coil, and the effective placement range of the wireless power receiving device on the wireless charging device is large, and the placement freedom is large.
According to the wireless charging method provided by the embodiment of the disclosure, by arranging the plurality of power receiving coils, compared with a single power receiving coil, the receiving power of the power receiving coil is increased, and the charging efficiency of a battery in the wireless power receiving device is improved.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (17)
1. A wireless powered device, comprising: n power receiving coils, a receiver, a charging management chip and a battery, wherein n is a positive integer greater than 1;
the output ends of the n power receiving coils are connected with the input end of the receiver, the output end of the receiver is connected with the input end of the charging management chip, and the output end of the charging management chip is connected with the battery;
the receiver is used for obtaining the power receiving proportion of each power receiving coil in the n power receiving coils and setting the receiving power of the n power receiving coils according to the power receiving proportion, the power receiving proportion of the ith power receiving coil is related to the coupling coefficient between the ith power receiving coil and the charging coil in the wireless charging equipment, and i is more than or equal to 1 and less than or equal to n.
2. The apparatus according to claim 1, wherein the n power receiving coils are arranged side by side in the same plane, and the annular regions of each of the n power receiving coils do not overlap each other.
3. The apparatus of claim 1,
the receiver is further configured to obtain total received power of the n power receiving coils, send a power adjustment signal to the wireless charging device according to the total received power, and control the total received power at a preset power.
4. The apparatus of claim 1, wherein the receiver is further configured to turn off the i-th power receiving coil when a power receiving ratio of the i-th power receiving coil is smaller than a preset ratio.
5. The apparatus of claim 3, wherein the receiver includes therein a coil detection and power distribution circuit, a microcontroller;
the coil detection and power distribution circuit is further configured to obtain total received power of the n powered coils;
the microcontroller is further configured to send a power adjustment signal to the wireless charging device according to the total received power, and control the total received power at a preset power.
6. The apparatus of claim 4, wherein coil detection and power distribution circuitry is included in the receiver;
the coil detection and power distribution circuit is configured to obtain the power reception ratio of each of the n power receiving coils, and set the reception power of the n power receiving coils according to the power reception ratio;
the coil detection and power distribution circuit is further configured to close the ith power receiving coil when the power receiving ratio of the ith power receiving coil is smaller than a preset ratio.
7. The device of claim 6, wherein the wireless powered device further comprises a processor and a Bluetooth transmission chip;
the processor is connected with the microcontroller, the Bluetooth transmission chip is connected with the processor, and the microcontroller is communicated with the Bluetooth transmission chip through the processor;
when wireless powered device with when adopting the magnetic resonance mode of charging to carry out wireless charging between the wireless charging device, microcontroller still is used for through bluetooth transmission chip to wireless charging device sends the power adjustment signal.
8. The device of claim 4, wherein when the wireless powered device and the wireless charging device are wirelessly charged by magnetic induction charging, the receiver is further configured to determine a powered coil with a highest coupling coefficient with the charging coil from the n powered coils as a communication coil, and transmit the power adjustment signal to the wireless charging device through the communication coil in the form of an analog signal.
9. The device of claim 1, wherein the magnetic induction charging mode is used for wireless charging when the magnetic resonance charging mode and the magnetic induction charging mode are simultaneously supported between the wireless powered device and the wireless charging device.
10. The device according to any one of claims 1 to 9, wherein the receiver is further configured to send a fast charging verification signal to the wireless charging device, where the fast charging verification signal is used to verify a fast charging right of the wireless powered device;
the receiver is further configured to receive a verification passing signal sent by the wireless charging device, where the verification passing signal is used to indicate that the wireless powered device has the fast charging right.
11. The device of claim 10, wherein the receiver is further configured to send a charging capability obtaining signal to the wireless charging device after receiving the verification passing signal, wherein the charging capability obtaining signal is used to obtain a maximum output power of a charger of the wireless charging device;
the receiver is further configured to set a maximum output voltage of the receiver according to the maximum output power;
the charging management chip is also used for dividing the ratio of the maximum output voltage to the value range according to the value range to which the maximum output voltage belongs to obtain the charging voltage;
the charging management chip is also used for charging the battery through the charging voltage.
12. The apparatus of claim 10, wherein the receiver is further configured to obtain a current capability of the n power receiving coils at the maximum output voltage through an automatic input current limiting manner, and to set a maximum output current of the n power receiving coils according to the current capability.
13. The device according to claim 11, wherein the wireless powered device further comprises a temperature sensor disposed on the battery periphery side, and the input terminal of the charge management chip is further connected to the temperature sensor;
the charging management chip is also used for adjusting the charging current corresponding to the charging voltage according to the temperature value acquired by the temperature sensor.
14. The device of claim 11, wherein the charge management chip is further configured to obtain a battery voltage of the battery;
the charging management chip is also used for adjusting the charging current corresponding to the charging voltage according to the battery voltage.
15. A wireless charging device, comprising: the device comprises a charger, a transmitter, a controller and a charging coil;
the input end of the charger is used for being connected with an alternating current power supply, the output end of the charger is connected with the input end of the transmitter, the output end of the transmitter is connected with the charging coil, the control end of the transmitter is connected with the controller, and the controller is used for receiving communication information sent by wireless powered equipment and sending the communication information to the wireless powered equipment;
the charging coil is used for transmitting wireless charging energy to n receiving coils in the wireless receiving equipment, the power receiving proportion of the ith receiving coil in the n receiving coils is related to the coupling coefficient between the ith receiving coil and the charging coil, wherein i is greater than or equal to 1 and less than or equal to n.
16. A wireless charging system, comprising a wireless charging device and a wireless powered device, the wireless powered device comprising the device of any one of claims 1 to 14, the wireless charging device comprising the device of claim 15.
17. The system of claim 16, wherein the wireless powered device is a mobile terminal device or a wearable device, and wherein the wireless charging device is a charging cradle.
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| US11522382B1 (en) | 2018-08-03 | 2022-12-06 | William Vahle | Wireless mobile battery |
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