CN113036946A - Wireless charging device and demodulation module thereof - Google Patents
Wireless charging device and demodulation module thereof Download PDFInfo
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- CN113036946A CN113036946A CN201911358170.6A CN201911358170A CN113036946A CN 113036946 A CN113036946 A CN 113036946A CN 201911358170 A CN201911358170 A CN 201911358170A CN 113036946 A CN113036946 A CN 113036946A
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- 230000001419 dependent effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000012358 sourcing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000001902 propagating effect Effects 0.000 description 2
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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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
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Abstract
The application discloses wireless charging device and demodulation module thereof. The demodulation module includes: a phase-locked loop that performs frequency demodulation on a data signal to acquire a control voltage corresponding to a frequency of the data signal; and the frequency code table querier receives the control voltage from the phase-locked loop, and inquires a frequency code table according to the control voltage so as to analyze the data signal to obtain configuration data, wherein the configuration data is used for configuring working parameters of the wireless charging device in real time. The wireless charging device performs real-time configuration when receiving the configuration data so that the operating parameters of the wireless charging device and the external electric equipment are matched with each other, thereby supporting different protocols and omitting a special chip.
Description
Technical Field
The present invention relates to the field of wireless charging technologies, and in particular, to a wireless charging device and a demodulation module thereof.
Background
The wireless charging technology is a technology for transmitting electric energy from a power supply device to a power consumption device in a wireless transmission manner. Since it is not necessary to use any physical plug and cable for connecting both, the electric device employing the wireless charging technology has an advantage of being conveniently and safely charged. Power supply devices and consumers that employ wireless charging technology are also referred to as contactless energy transfer devices. For example, wireless charging technology has been widely used in mobile terminals such as mobile phones.
However, the various power supply apparatuses respectively employ different power transfer means, such as electromagnetic induction, radio waves, magnetic resonance, and the like, and the various power supply apparatuses respectively support different wireless charging standards, such as Qi standard, A4WP standard, innpofi technology, Wi-Po technology. For a powered device, only the corresponding wireless charging standard is supported to match the power supply device to obtain power. The existing power supply equipment and the existing electric equipment adopt special chips supporting at least one protocol, and are also provided with corresponding receiving antennas and transmitting antennas so as to realize a communication function and a charging control function between the power supply equipment and the electric equipment.
The use of a dedicated chip for wireless charging in the power supply device and the electric power consuming device not only results in a complicated circuit but also supports only a limited type of predetermined protocol, and the dedicated receiving antenna and transmitting antenna also results in an increase in the size of the device.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a wireless charging device and a demodulation module thereof, which support different protocols by using real-time configured working parameters and can omit a dedicated chip.
According to an aspect of the present invention, there is provided a demodulation module for a wireless charging apparatus, including: a phase-locked loop that performs frequency demodulation on a data signal to acquire a control voltage corresponding to a frequency of the data signal; and the frequency code table querier receives the control voltage from the phase-locked loop, and inquires a frequency code table according to the control voltage so as to analyze the data signal to obtain configuration data, wherein the configuration data is used for configuring working parameters of the wireless charging device in real time.
Preferably, the method further comprises the following steps: a band-pass filter connected to the phase-locked loop for filtering a received signal of the antenna to obtain a data signal of an effective bandwidth frequency and providing the data signal to the phase-locked loop.
Preferably, the method further comprises the following steps: and the state detector is connected between the phase-locked loop and the frequency code table querier, acquires a receiving and sending state signal from a control module of the wireless charging device, and forwards the control voltage when the receiving and sending state signal indicates that the wireless charging device is in an idle mode and the control voltage is effective.
Preferably, the method further comprises the following steps: and the data stack is connected with the frequency code table querier and used for temporarily storing the configuration data and generating a stack state signal to indicate the start or the completion of the receiving of the configuration data.
Preferably, the phase-locked loop includes a phase discriminator, a loop filter, a forward path formed by the voltage-controlled oscillator, and a frequency phase feedback path formed by the frequency divider, and when the data signal is received, the output signal frequency of the voltage-controlled oscillator and the data signal keep a fixed phase difference, and the frequency demodulation of the data signal is realized by using the control voltage of the voltage-controlled oscillator.
According to another aspect of the present invention, there is provided a wireless charging apparatus including: an oscillator for generating a frequency signal; the power amplifier is connected with the oscillator and is used for amplifying the frequency signal; the first antenna is connected with the power amplifier through the first matching network, and converts the frequency signal into a radiation field so as to transmit electric energy; the demodulation module is connected to the first antenna to receive a data signal, and demodulates the data signal to obtain configuration data; and a control module, connected to the demodulation module to obtain the configuration data, connected to at least one of the oscillator, the power amplifier and the first matching network, and providing a corresponding adjustment signal according to the configuration data.
Preferably, the wireless charging apparatus is in one of a transmitting, receiving and idle mode.
Preferably, when the control module detects an external electric device, the wireless charging apparatus is in a transmission mode, transmits power via the first antenna, and receives a data signal via the first antenna.
Preferably, when the control module does not detect an external power-consuming device, the wireless charging apparatus is in an idle mode, the wireless charging apparatus stops transmitting power, and receives a data signal via the first antenna.
Preferably, the control module receives a stack status signal from the data stack, the stack status signal indicating that reception of the configuration data is started or completed.
Preferably, the wireless charging device is in a receiving mode when the receiving of the configuration data is started, and resumes the transmitting mode when the receiving of the configuration data is completed.
Preferably, the adjustment signal is used to control the operating frequency of the frequency signal.
Preferably, the data signal received by the wireless charging device includes at least one protocol-related configuration data for configuring the operating parameters of the wireless charging device in real time to match the operating parameters of the external powered device.
According to the wireless charging device of the embodiment, the phase-locked loop is adopted in the demodulation module to perform frequency demodulation so as to obtain the control voltage corresponding to the frequency of the data signal, and the frequency code table is inquired according to the control voltage to directly analyze data, so that the data signal can be quickly analyzed to obtain the configuration data. Therefore, the wireless charging device does not need to use a special chip supporting at least one protocol, and at least one protocol-related configuration data is transmitted to the wireless charging device in real time, so that the operating parameters of the wireless charging device conform to the at least one protocol. The antenna of the wireless charging device has both power transmission and data communication functions, and thus a transmitting antenna and a receiving antenna dedicated to data communication can be omitted.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic block diagram of a wireless charging system according to the prior art.
Fig. 2 shows a schematic block diagram of a wireless charging system according to an embodiment of the invention.
Fig. 3 is a detailed block diagram of a demodulation module in a wireless charging apparatus according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic block diagram of a wireless charging system according to the prior art. The wireless charging system 100 includes a power supply device 110 and a power consumption device 120, which transmit power therebetween by radio waves.
The power unit 110 generates a radiation field for providing energy transfer in an operational state. Powered device 120 is coupled to the radiated field, extracts electromagnetic energy from the radiated field and generates a charging current to charge battery 131. The power supply device 110 is spaced apart from the powered device 120. In this embodiment, the power sourcing equipment 110 and the powered device 120 are configured according to a mutual resonant relationship. When the resonant frequency of powered device 120 is very close to the resonant frequency of power sourcing equipment 110, power transfer losses between power sourcing equipment 110 and powered device 120 are minimal when powered device 120 is positioned in the "near field" of the radiated field.
The power unit 110 further includes an antenna 116 for providing a means for power transmission, and the powered device 120 further includes an antenna 126 for providing a means for power reception. The parameters of antennas 116 and 126 are set according to the application and the device to be associated therewith. The power transfer of the power sourcing equipment 110 and the powered device 120 is related to the coupling efficiency of the antennas 116 and 126, coupling most of the energy in the near field of the antenna 116 into the antenna 126, rather than propagating most of the energy in the form of electromagnetic waves into the far field. The area around antenna 116 and antenna 126 where this near-field coupling can occur is referred to as a coupling-mode region.
The power supply device 110 further includes an oscillator 111, a power amplifier 112, and a matching network 113. The oscillator 111 is, for example, a voltage-controlled oscillator, and generates an adjustment signal of a desired frequency based on the frequency adjustment signal. The power amplifier 112 amplifies the frequency signal and provides it to the antenna 116 via the matching network 113 to generate a radiated field. The matching network 113 is used to match the impedance of the power supply device 110 to the antenna 116.
The powered device 120 further includes a matching network 121, and a rectifier 122. The matching network 121 is used to match the impedance of the powered device 120 to the antenna 126. The rectifier 122 converts the electric energy received via the antenna 126 into a dc output voltage to charge the battery 131 or directly supply power to the circuit module of the electric device.
In the wireless charging system 100 according to the related art, the powered device 120 and the power supply device 110 may communicate on separate communication channels (e.g., bluetooth, zigbee, cellular, etc.) so as to comply with data communication requirements of the relevant protocol.
Fig. 2 shows a schematic block diagram of a wireless charging system according to an embodiment of the invention. The wireless charging system 200 includes a power supply device 210 and a power consumption device 220, which transmit power therebetween in a radio wave manner.
The power unit 210 generates a radiation field for providing energy transfer in an operational state. Powered device 220 is coupled to the radiated field, extracts electromagnetic energy from the radiated field and generates a charging current to charge battery 131. The power supply device 210 is spaced apart from the power consuming device 220. In this embodiment, the power sourcing equipment 210 and the powered device 220 are configured according to a mutual resonant relationship. When the resonant frequency of powered device 220 is very close to the resonant frequency of powered device 210, the power transfer loss between powered device 210 and powered device 220 is minimal when powered device 220 is positioned in the "near field" of the radiated field.
The power unit 210 further includes an antenna 116 for providing a means for power transmission, and the powered device 220 further includes an antenna 126 for providing a means for power reception. The parameters of antennas 116 and 126 are set according to the application and the device to be associated therewith. The power transfer of the power sourcing equipment 210 and the powered device 220 is related to the coupling efficiency of the antennas 116 and 126, coupling most of the energy in the near field of the antenna 116 into the antenna 126, rather than propagating most of the energy in the form of electromagnetic waves into the far field. The area around antenna 116 and antenna 126 where this near-field coupling can occur is referred to as a coupling-mode region.
The power supply device 210 further includes an oscillator 111, a power amplifier 112, a matching network 113, a control module 114, and a demodulation module 115. The oscillator 111 is, for example, a voltage-controlled oscillator, and generates an adjustment signal of a desired frequency based on the frequency adjustment signal. The power amplifier 112 amplifies the frequency signal and provides it to the antenna 116 via the matching network 113 to generate a radiated field. The matching network 113 is used to match the impedance of the power supply 210 to the antenna 116. The demodulation module 115 is coupled to the antenna 116 and receives data signals associated with the configuration data from the powered device 220. The control module 114 is connected to the demodulation module 115, receives the configuration data from the demodulation module 115, and generates an adjustment signal for at least one of the oscillator 111, the power amplifier 112, and the matching network 113 according to the configuration data.
The powered device 220 also includes a matching network 121, a rectifier 122, and a configuration module 123. The matching network 121 is used to match the impedance of the powered device 220 to the antenna 126. The rectifier 122 converts the electric energy received via the antenna 126 into a dc output voltage to charge the battery 131 or directly supply power to the circuit module of the electric device. The configuration module 123 is connected to the antenna 126, and modulates the configuration data into a data signal, which is transmitted to the power supply device 210 via the antenna 126.
According to the wireless charging system 200 of the embodiment, the power supply apparatus 210 operates in the transmission, reception, and idle modes. Power supply 210 is in a half-duplex mode in which it can not only transmit power but also receive and interpret data signals. For example, when the power supply apparatus 210 does not detect the presence of the power consumer 220, the power supply apparatus 210 is in the idle mode, the oscillator 111 stops operating, and thus power transmission stops. When the power supply device 210 detects the presence of the powered device 220, the power supply device 210 is in a transmit mode and the oscillator 111 operates to maintain power transmission. When the power supply apparatus 210 detects that the power consumption apparatus 220 transmits the data signal, the power supply apparatus 210 is in the reception mode, and the oscillator 111 suspends the operation, thereby suspending the power transmission.
Further, in the receiving mode of the power supply device 210, the demodulation module 115 receives a data signal from the power consumption device 220, parses configuration data from the data signal, and the control module 114 generates an adjustment signal for at least one of the oscillator 111, the power amplifier 112, and the matching network 113 according to the configuration data. The operating parameters of the power supply 210 are matched to the operating parameters of the powered device 220 such that power transfer losses between the power supply 210 and the powered device 220 are minimized.
In this embodiment, the power supply device 210 and the electric device 220 of the wireless charging system 200 do not need to use a dedicated chip supporting at least one protocol, but transmit configuration data related to at least one protocol from the electric device 220 to the power supply device 210 in real time so that the operating parameters of the two match each other. The antenna 116 of the power supply apparatus 210 and the antenna 126 of the electric-powered apparatus 220 have both power transmission and data communication functions, and thus a transmitting antenna and a receiving antenna dedicated to data communication can be omitted.
Fig. 3 is a detailed block diagram of a demodulation module in a wireless charging apparatus according to an embodiment of the present invention. The wireless charging apparatus is, for example, a power supply device in the wireless charging system shown in fig. 2.
In a wireless charging device, antenna 116 combines power transfer and data communication functions. In the operating state, the wireless charging device transmits radio waves of an operating frequency via the antenna 116 to transmit power, and receives radio waves of a communication frequency via the antenna 116 to receive data signals.
The demodulation module 115 comprises a band-pass filter 11, a phase-locked loop 12, a state detector 13, a frequency code table look-up 14 and a data stack 15. The demodulation module 115 parses the configuration data from the data signal and provides the configuration data to the control module of the wireless charging device to further control the operating parameters of the wireless charging device.
The band-pass filter 11 is connected to the antenna 116 to obtain a reception signal, and filters the reception signal of the antenna 116 to obtain a data signal of a communication frequency. The band-pass filter 11 only preserves the effective bandwidth frequencies, removing high and low frequency interference.
The phase locked loop 12 is connected to the band pass filter 11 to acquire a data signal. The phase-locked loop 12 includes a forward path formed by a phase detector, a loop filter, and a voltage-controlled oscillator, and a feedback path of the frequency phase formed by a frequency divider. The input signal of the phase locked loop 12 is a data signal and the output signal is a control voltage of a voltage controlled oscillator. Due to the operating principle of the phase locked loop 12, the frequency of the output signal of the voltage controlled oscillator maintains a fixed phase difference with the data signal, and the control voltage of the voltage controlled oscillator reflects the frequency change of the input signal. Therefore, frequency demodulation of the data signal is achieved using the control voltage in the phase locked loop 12.
The status detector 13 is connected to the phase-locked loop 12 to obtain a control voltage, and is connected to a control module of the wireless charging apparatus to obtain a transceiving status signal. The transceiving state signal is used for indicating that the wireless charging device is in one of a transmission mode and an idle mode. When the wireless charging device is in an idle mode and the control voltage is active, the state detector 13 forwards the control voltage.
The frequency code table query unit 14 is connected to the status detector 13 to obtain the control voltage, and compares the control voltage with its own frequency code table to obtain the configuration data.
The data stack 15 is connected to the frequency code table look-up unit 14 for temporarily storing configuration data. The data stack 15 sends the stack status to the control module of the wireless charging device. And the control module of the wireless charging device judges whether the receiving of the configuration data is started or finished according to the stack state. When the receiving of the configuration data is started, the wireless charging device is in a receiving mode, and the power transmission is suspended. Upon completion of the reception of the configuration data, the wireless charging device reads the configuration data from the data stack 15, generates a regulation signal of at least one of the oscillator, the power amplifier and the first matching network according to the configuration data, and then resumes the power transmission.
In this embodiment, the demodulation module of the wireless charging device performs frequency demodulation using a phase-locked loop to obtain a control voltage corresponding to the frequency of the data signal, and directly analyzes the data by querying the frequency code table according to the control voltage, so that the data signal can be quickly analyzed to obtain the configuration data. Therefore, the wireless charging device does not need to use a special chip supporting at least one protocol, and at least one protocol-related configuration data is transmitted to the wireless charging device in real time, so that the operating parameters of the wireless charging device conform to the at least one protocol. The antenna of the wireless charging device has both power transmission and data communication functions, and thus a transmitting antenna and a receiving antenna dedicated to data communication can be omitted.
It should be noted that in the description of the present invention, the contained 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 identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (13)
1. A demodulation module for a wireless charging device, comprising:
a phase-locked loop that performs frequency demodulation on a data signal to acquire a control voltage corresponding to a frequency of the data signal; and
a frequency code table querier for receiving said control voltage from said phase locked loop, for querying a frequency code table according to the control voltage to resolve said data signal to obtain configuration data,
the configuration data is used for configuring the working parameters of the wireless charging device in real time.
2. The demodulation module of claim 1, further comprising:
a band-pass filter connected to the phase-locked loop for filtering a received signal of the antenna to obtain a data signal of an effective bandwidth frequency and providing the data signal to the phase-locked loop.
3. The demodulation module of claim 1, further comprising:
and the state detector is connected between the phase-locked loop and the frequency code table querier, acquires a receiving and sending state signal from a control module of the wireless charging device, and forwards the control voltage when the receiving and sending state signal indicates that the wireless charging device is in an idle mode and the control voltage is effective.
4. The demodulation module of claim 1, further comprising:
and the data stack is connected with the frequency code table querier and used for temporarily storing the configuration data and generating a stack state signal to indicate the start or the completion of the receiving of the configuration data.
5. The demodulation module according to claim 1, wherein the phase-locked loop includes a phase detector, a loop filter, a forward path of a voltage-controlled oscillator, and a feedback path of a frequency phase of a frequency divider, when the data signal is received, the frequency of the output signal of the voltage-controlled oscillator maintains a fixed phase difference with the data signal, and the frequency demodulation of the data signal is implemented by using the control voltage of the voltage-controlled oscillator.
6. A wireless charging device, comprising:
an oscillator for generating a frequency signal;
the power amplifier is connected with the oscillator and is used for amplifying the frequency signal;
the first antenna is connected with the power amplifier through the first matching network, and converts the frequency signal into a radiation field so as to transmit electric energy;
a demodulation module as claimed in any one of claims 1 to 5, connected to the first antenna to receive a data signal and demodulate the data signal to obtain configuration data; and
and the control module is connected with the demodulation module to obtain the configuration data, is connected with at least one of the oscillator, the power amplifier and the first matching network, and provides a corresponding adjusting signal according to the configuration data.
7. The wireless charging apparatus of claim 6, wherein the wireless charging apparatus is in one of a transmit, receive, and idle mode.
8. The wireless charging apparatus of claim 7, wherein the wireless charging apparatus is in a transmit mode, transmits power via the first antenna, and receives a data signal via the first antenna when the control module detects an external powered device.
9. The wireless charging apparatus of claim 7, wherein when the control module does not detect an external powered device, the wireless charging apparatus is in an idle mode, the wireless charging apparatus stops transmitting power, and receives a data signal via the first antenna.
10. The wireless charging apparatus of claim 8 or 9, wherein the control module receives a stack status signal from the data stack indicating that receipt of the configuration data is either initiated or completed.
11. The wireless charging device of claim 10, wherein the wireless charging device is in a receive mode when receipt of the configuration data begins and resumes a transmit mode when receipt of the configuration data completes.
12. The wireless charging apparatus of claim 8 or 9, wherein the adjustment signal is used to control an operating frequency of the frequency signal.
13. The wireless charging apparatus of claim 6, wherein the data signal received by the wireless charging apparatus comprises at least one protocol-dependent configuration data for configuring the operating parameters of the wireless charging apparatus in real-time to match the operating parameters of the external powered device.
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