CN112928786A - Wireless charging device and wireless charging method - Google Patents
Wireless charging device and wireless charging method Download PDFInfo
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- CN112928786A CN112928786A CN201911243681.3A CN201911243681A CN112928786A CN 112928786 A CN112928786 A CN 112928786A CN 201911243681 A CN201911243681 A CN 201911243681A CN 112928786 A CN112928786 A CN 112928786A
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- 230000008054 signal transmission Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 238000010586 diagram Methods 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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H04B5/79—
Abstract
The invention relates to a wireless charging device, which is used for charging a charging receiving end and comprises: the power supply input end is used for inputting an alternating current power supply; the power supply conversion module is electrically connected to the power supply input end and is used for converting the alternating current power supply into a direct current power supply; the power transmitting module is electrically connected with the power conversion module and used for providing charging electric energy to the charging receiving end; the charging control module is electrically connected to the power conversion module and the power transmitting module respectively; the power transmitting module is further used for communicating with the charging receiving terminal, and the charging control module controls the power transmitting module according to the charging power demand information of the charging receiving terminal.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging device and a wireless charging method.
Background
In recent years, with the development of wireless charging technology, the wireless charging technology has been widely applied to charging of various electronic terminal devices, such as various mobile phones, notebook computers, cameras, and portable devices such as video cameras. The system architecture of the wireless charging device currently on the market is shown in fig. 1, wherein the AC-to-DC adapter M includes: the power supply conversion module S, the power switch GA and the output voltage negotiation module Vout; the wireless charger W includes: the wireless charging system comprises a power switch GB, a DC-to-DC module N, an input voltage negotiation module Vin, a wireless charging control module P and a wireless charging power transmitting module L. The wireless chargers are all direct current voltage input, part of the wireless chargers need to work in different modes and correspond to different direct current input voltages, so that a complex and expensive AC-DC Adapter (Adapter) needs to be matched to supply the direct current voltage for the wireless chargers, the adapters use USB as a wired wireless charger and need to exchange information through a USB communication chip, a voltage regulation identification circuit or a DC-DC circuit needs to be added at the end of the wireless charger, the overall cost of the wireless charger is increased, and if the appropriate AC-DC Adapter is not selected to supply power to the wireless charger, the wireless charger can not fully exert the maximum efficiency or even cannot work.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a wireless charging device, as shown in fig. 2, which highly integrates an AC adapter and a wireless charger, so as to reduce the number of required components to the maximum extent, reduce the cost, and make the whole system simple, efficient and convenient to use.
Specifically, the present invention discloses a wireless charging device for charging a charging receiving terminal, comprising:
the power supply input end is used for inputting an alternating current power supply;
the power supply conversion module is electrically connected to the power supply input end and is used for converting the alternating current power supply into a direct current power supply;
the power transmitting module is electrically connected with the power conversion module and used for providing charging electric energy to the charging receiving end;
the charging control module is electrically connected to the power conversion module and the power transmitting module respectively;
the power transmitting module is further used for communicating with the charging receiving terminal, and the charging control module controls the power transmitting module according to the charging power demand information of the charging receiving terminal.
In the above wireless charging apparatus, the power transmitting module includes a power transmitting unit, a signal demodulating unit and a transmitting coil; a first end of the power transmitting unit is electrically connected with the power supply conversion module, a second end of the power transmitting unit is connected with the sending coil, and the signal demodulating unit is respectively connected with the sending coil and the charging control module;
the sending coil sends a pulse signal to the charging receiving end and receives a feedback signal returned by the charging receiving end; the signal demodulation unit demodulates the feedback signal to obtain a demodulation signal, and sends the demodulation signal to the charging control module.
In the above wireless charging device, the power transmitting unit is further electrically connected to the charging control module, and the charging control module controls the output power of the power transmitting unit according to the demodulation signal, and controls the frequency variation of the transmitting coil through the power transmitting unit to adjust the signal transmission between the transmitting coil and the charging receiving terminal.
In the above wireless charging apparatus, the demodulation signal includes charging power demand information of the device to be charged.
In the above wireless charging device, a charging protocol is preset in the charging control module, and the charging control module calls the corresponding charging protocol according to the charging power demand information of the charged device to control the power conversion module to provide the corresponding charging voltage for the power transmitting module.
In the above wireless charging apparatus, the charging protocol includes: a first charging protocol and a second charging protocol;
the first charging protocol is used for providing one or more specific value voltages, and the second charging protocol is used for determining to provide charging voltage for the charged device according to the charging power demand information of the charged device.
In order to achieve another object of the present invention, the present invention further provides a wireless charging method applied to any one of the above wireless charging devices, the method including the steps of:
starting the power transmitting module in a standby state, wherein the power transmitting module continuously or periodically transmits a pulse signal outwards, and the wireless charging receiving end receives the pulse signal and returns a feedback signal to the power transmitting module;
the signal demodulation unit receives and demodulates the feedback signal to obtain a demodulation signal, and transmits the demodulation signal to the charging control module;
and the charging control module receives the demodulation signal, calls the charging protocol according to the power demand information of the charged equipment contained in the demodulation signal, and controls the power supply conversion module to provide corresponding charging voltage for the power transmitting module.
In the above wireless charging method, when the power transmitting module in a standby state is started, if the power transmitting module does not receive the feedback signal within a preset time, it is determined that an error occurs at the charging receiving end.
In the above wireless charging method, the power transmitting module includes a power transmitting unit, a signal demodulating unit and a transmitting coil; a first end of the power transmitting unit is electrically connected with the power supply conversion module, a second end of the power transmitting unit is connected with the sending coil, and the signal demodulating unit is respectively connected with the sending coil and the charging control module;
the sending coil sends a pulse signal to the charging receiving end and receives a feedback signal returned by the charging receiving end; the signal demodulation unit demodulates the feedback signal to obtain a demodulation signal, and sends the demodulation signal to the charging control module.
In the above wireless charging method, the power transmitting unit is further electrically connected to the charging control module, the charging control module controls the output power of the power transmitting unit according to the demodulation signal, and controls the frequency variation of the transmitting coil through the power transmitting unit to adjust the signal transmission between the transmitting coil and the charging receiving terminal.
In the above wireless charging method, the demodulation signal includes charging power requirement information of the charged device.
In the wireless charging method, a charging protocol is preset in the charging control module, and the charging control module calls the corresponding charging protocol according to the charging power demand information of the charged device to control the power conversion module to provide corresponding charging voltage for the power transmitting module.
In the above wireless charging method, the charging protocol includes: a first charging protocol and a second charging protocol; the first charging protocol is used for providing one or more specific value voltages, and the second charging protocol is used for determining to provide charging voltage for the charged device according to the charging power demand information of the charged device.
In order to make the aforementioned features and effects of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a system architecture diagram of a wireless charging device currently on the market.
Fig. 2 is a block diagram of a two-in-one wireless charging device according to an embodiment of the invention.
Fig. 3 is a flowchart of a wireless charging method according to an embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, methods, steps and effects of the wireless charging device and the wireless charging method according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
The foregoing and other technical and other features and advantages of the invention will be apparent from the following, more particular, description of the preferred embodiments of the invention, as illustrated in the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.
Referring to fig. 2, an embodiment of the present invention provides a wireless charging device, including a power input terminal 10, a power conversion module 20, a power transmitting module 30 and a charging control module 40, where the power input terminal 10 is used for accessing a commercial power to input a power voltage, and the power conversion module 20 is electrically connected to the power input terminal, receives an AC power input from the power input terminal, and directly converts the AC power into a DC power. In this embodiment, the power conversion module 20 is configured to provide a dc voltage meeting the requirement of the charging circuit to the power transmitting module 30.
The power transmitting module 30 is electrically connected to the power converting module 20 and configured to provide charging power to the charging receiving terminal, the power transmitting module 30 further includes a power transmitting unit 301, a signal demodulating unit 302 and a transmitting coil 303, one end of the power transmitting unit 301 is electrically connected to the power converting module 20, the other end of the power transmitting unit 301 is connected to the transmitting coil 303, and the signal demodulating unit 302 is respectively connected to the transmitting coil 303 and the charging control module 40.
Further, the power transmitting unit 301 is electrically connected to the charging control module 40 to control the charging control module 40 to the power transmitting module 30, on one hand, the charging control module 40 controls the power transmitting unit 301 to adjust the output power of the transmitting coil 303 according to the power requirement of the charging receiving terminal, and on the other hand, the power transmitting unit 301 adjusts the frequency variation of the transmitting coil 303 to control the signal transmission between the transmitting coil 303 and the charging receiving terminal.
The charging control module 40 is electrically connected to the signal demodulating units 302 in the power conversion module 20 and the power transmitting module 30, respectively, and the signal demodulating units 302 are configured to receive the signal returned from the charging receiving terminal from the transmitting coil 303, demodulate the signal, and then transmit the signal to the charging control module 40. In an embodiment of the present invention, the power transmitting module 30 communicates with the charging receiving end, confirms the access condition of the charging device at the charging receiving end, confirms (ping) the accessed charging device, and obtains the charging requirement information of the charging device.
Further, the power transmitting module 30 obtains a dc voltage from the power converting module 20 as an input, inverts the obtained dc voltage into a high-frequency ac signal, and transmits the high-frequency ac signal through the transmitting coil 303 electrically connected to the power transmitting unit 301. The transmitting coil 303 may form an electromagnetic induction coupling with a receiving coil entering an effective electromagnetic induction distance of the transmitting coil 303 to generate an induced magnetic field, so as to transmit power to the charging device at the wireless charging receiving end.
Further, before the transmitting coil 303 transmits power to the charging device of the wireless charging receiving end, the transmitting coil 303 searches whether the wireless charging receiving end has the charging device connected thereto by transmitting a pulse signal, the wireless charging receiving end receives the pulse signal transmitted by the transmitting coil 303, and returns a feedback signal to the transmitting coil 303 to inform that the transmitting coil 303 has connected to the charging device, and if the transmitting coil 303 does not receive a response from the wireless charging receiving end due to timeout, it is determined that there is no charging device connected or a connection error, and the charging operation of the wireless charging device is not started.
Further, after receiving the feedback signal returned by the wireless charging receiving terminal, the sending coil 303 transmits the feedback signal to the signal demodulating unit 302, and the signal demodulating unit 302 demodulates the feedback signal to obtain a demodulated signal and sends the demodulated signal to the charging control module 40.
Further, in an embodiment of the present invention, the pulse signal includes a charging requirement information return request of the charged device, the demodulated signal includes power requirement information of the charged device, the charging control module 40 calls a charging protocol preset inside the charged device according to the power requirement information of the charged device to control the power conversion module 20 to provide a corresponding charging voltage to the power transmitting module 30, and the charging control module 40 further controls the wireless charging power transmitted to the transmitting coil 303 through the power transmitting voltage 301 in the power transmitting module 30.
The charging control module 40 is further configured to operate the wireless charging device in a low power consumption standby state by the power conversion module 20 before the demodulation signal is not acquired or within a preset time interval. The charging control module 40 receives the demodulated signal and notifies and controls the power conversion module 20 to provide a corresponding charging voltage to the power transmission module 30, that is, the wireless charging device operates in a charging power transmission state. More specifically, when the wireless charging device operates in a low power consumption standby state, the charging control module 40 controls the power transmitting module 30 to invert the dc voltage into a high-frequency ac signal with a first power and transmit the high-frequency ac signal via the transmitting coil 303; and when the wireless charging device works in a charging power transmitting state, the charging control module 40 controls the power transmitting module 30 to invert the direct-current voltage into a high-frequency alternating-current signal with second power, and the high-frequency alternating-current signal is transmitted out through the transmitting coil 303 to charge the charged equipment. The high frequency ac signal is continuously or periodically transmitted to the outside, and is sufficient for the wireless charging receiving end entering the effective electromagnetic induction distance to detect the state information of the charged device and modulate a feedback signal containing the state information of the charged device to the transmitting coil 303, where the state information of the charged device is, for example, the state information of whether charging is required or not, full charge, etc. Further, the charging control module 40 calculates the charging power requirement information of the device to be charged according to the state information, and calls a corresponding charging protocol preset in the charging control module according to the charging power requirement information.
In an embodiment of the present invention, a charging protocol Q is preset in the charging control module 40, and the charging control module invokes the corresponding charging protocol according to the charging power requirement information of the charged device to control the power conversion module 20 to provide the corresponding charging voltage for the power transmitting module 30. The charging protocol includes: a first charging protocol Q1 and a second charging protocol Q2; the first charging protocol Q1 is a charging protocol for providing one or more specific values of voltage, and includes a low power charging protocol and a medium power charging protocol, the low power charging protocol is, for example, to control the transmitting coil 303 to fixedly provide a voltage input of 5V, and the medium power charging protocol may be configured to select the transmitting end to provide a voltage input of, for example, 9V, 12V or other specific values according to the type of the transmitting coil, the required power of the receiving coil, and the like; the second charging protocol Q2 is used to determine to provide a charging voltage for the charged device according to the charging power requirement information of the charged device, that is, under the charging protocol, a voltage output with a specific value is not preset, and the finally determined voltage output value depends on the negotiation between the sending end and the receiving end, that is, the input voltage size defined by the proprietary protocol is provided.
To achieve another object of the present invention, the present invention further relates to a wireless charging method in another embodiment, the charging method employs the above wireless charging apparatus, and includes the following steps, as shown in fig. 3:
s100: starting the power transmitting module 30 in a standby state, wherein the power transmitting module 30 continuously or periodically transmits a pulse signal to the outside, and the wireless charging receiving end receives the pulse signal and returns a feedback signal to the power transmitting module 30;
s200: the signal demodulation unit 302 receives and demodulates the feedback signal to obtain a demodulated signal, and transmits the demodulated signal to the charging control module 40;
s300: the charging control module 40 receives the demodulated signal, invokes the charging protocol according to the power requirement information of the charged device included in the demodulated signal, and controls the power conversion module 20 to provide the corresponding charging voltage to the power transmitting module.
In the above wireless charging method, when the power transmitting module in the standby state is started, if the power transmitting module 30 does not receive the feedback signal within a preset time, it is determined that an error occurs at the charging receiving end.
The charging receiving end is arranged on the transmitting end of the same charging device, the transmitting end adjusts different working voltages through handshake negotiation with the receiving end so as to meet different receiving end power requirements, and the charging transmitting end meets the charging power requirements of different charged devices through setting a plurality of charging protocols and private protocols, so that the optimized charging efficiency is realized. Further, in an embodiment of the present invention, the sending end is configured to periodically obtain the charging state information of the charged device, so as to obtain the instant charging power requirement information of the charged device, and dynamically adjust the charging power of the charging apparatus. In addition, the sending end periodically obtains the charging state information of the charged device through the feedback signal, and when the sending end does not receive the feedback signal within a preset time, the sending end and the receiving end are judged to be in error connection, so that the connection with the receiving end is interrupted, the charging is stopped, and the charging device automatically enters a standby state.
In an embodiment of the present invention, the internal of the transmitting end of the wireless charging device is highly integrated, the whole wireless charging device is manufactured on the same substrate, the charging control module 40 directly controls the power conversion module 20, a plurality of modules such as voltage negotiation in the middle are reduced, a chip dedicated for communication is not required to be built in, communication elements on both sides of the transmitting end and the receiving end are eliminated, for example, when the wireless power transmission module 30 needs 5V, the wireless charging control module directly routes a wire to inform the first control module 20 to provide 5V for the wireless power transmission module, and the overall cost is reduced on the basis of adapting to different power requirements of different receiving ends.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A wireless charging device for charging a charging receiving terminal, comprising:
the power supply input end is used for inputting an alternating current power supply;
the power supply conversion module is electrically connected to the power supply input end and is used for converting the alternating current power supply into a direct current power supply;
the power transmitting module is electrically connected with the power conversion module and used for providing charging electric energy to the charging receiving end;
the charging control module is electrically connected to the power conversion module and the power transmitting module respectively;
the power transmitting module is further used for communicating with the charging receiving terminal, and the charging control module controls the power transmitting module according to the charging power demand information of the charging receiving terminal.
2. The wireless charging device of claim 1, wherein the power transmitting module comprises a power transmitting unit, a signal demodulating unit and a transmitting coil;
a first end of the power transmitting unit is electrically connected with the power supply conversion module, and a second end of the power transmitting unit is connected with the sending coil;
the signal demodulation unit is respectively connected with the transmitting coil and the charging control module;
the sending coil sends a pulse signal to the charging receiving end and receives a feedback signal returned by the charging receiving end; the signal demodulation unit demodulates the feedback signal to obtain a demodulation signal, and sends the demodulation signal to the charging control module.
3. The wireless charging device according to claim 1 or 2, wherein the power transmitting unit is further electrically connected to the charging control module, the charging control module controls the output power of the power transmitting unit according to the demodulation signal, and controls the frequency variation of the transmitting coil through the power transmitting unit to adjust the signal transmission between the transmitting coil and the charging receiving terminal.
4. The wireless charging apparatus of claim 2, wherein the demodulation signal comprises charging power requirement information of the charging receiving terminal.
5. The wireless charging device of claim 4, wherein a charging protocol is preset in the charging control module, and the charging control module invokes the corresponding charging protocol according to the charging power requirement information of the charging receiving terminal to control the power conversion module to provide the corresponding charging voltage for the power transmitting module.
6. The wireless charging apparatus of claim 5, wherein the charging protocol comprises: a first charging protocol and a second charging protocol;
the first charging protocol is used for providing one or more specific value voltages, and the second charging protocol is used for determining to provide charging voltage for the charged device according to the charging power demand information of the charging receiving end.
7. A wireless charging method applied to the wireless charging device according to any one of claims 1 to 6, the method comprising the steps of:
starting the power transmitting module in a standby state, wherein the power transmitting module continuously or periodically transmits a pulse signal outwards, and the wireless charging receiving end receives the pulse signal and returns a feedback signal to the power transmitting module;
the signal demodulation unit receives and demodulates the feedback signal to obtain a demodulation signal, and transmits the demodulation signal to the charging control module;
and the charging control module receives the demodulation signal, calls the charging protocol according to the power demand information of the charging receiving end contained in the demodulation signal, and controls the power supply conversion module to provide corresponding charging voltage for the power transmitting module.
8. The wireless charging method of claim 7, wherein when the power transmitter module in a standby state is started, if the power transmitter module does not receive the feedback signal within a predetermined time, it is determined that an error occurs at the charging receiver.
9. The wireless charging method of claim 7, wherein the power transmitting module comprises a power transmitting unit, a signal demodulating unit and a transmitting coil; a first end of the power transmitting unit is electrically connected with the power supply conversion module, a second end of the power transmitting unit is connected with the sending coil, and the signal demodulating unit is respectively connected with the sending coil and the charging control module;
the sending coil sends a pulse signal to the charging receiving end and receives a feedback signal returned by the charging receiving end; the signal demodulation unit demodulates the feedback signal to obtain a demodulation signal, and sends the demodulation signal to the charging control module.
10. The wireless charging method according to claim 9, wherein the power transmitting unit is further electrically connected to the charging control module, the charging control module controls the output power of the power transmitting unit according to the demodulation signal, and adjusts the signal transmission between the transmitting coil and the charging receiving terminal by controlling the frequency variation of the transmitting coil through the power transmitting unit.
11. The wireless charging method according to claim 9, wherein the demodulation signal includes charging power requirement information of the charging receiving terminal.
12. The wireless charging method of claim 11, wherein a charging protocol is preset in the charging control module, and the charging control module invokes the corresponding charging protocol according to the charging power requirement information of the charging receiver to control the power conversion module to provide the corresponding charging voltage for the power transmitter module.
13. The charging method of claim 12, wherein the charging protocol comprises: a first charging protocol and a second charging protocol; the first charging protocol is used for providing one or more specific value voltages, and the second charging protocol is used for determining to provide charging voltage for the charging receiving terminal according to the charging power demand information of the charging receiving terminal.
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| CN201911243681.3A CN112928786A (en) | 2019-12-06 | 2019-12-06 | Wireless charging device and wireless charging method |
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| CN201911243681.3A CN112928786A (en) | 2019-12-06 | 2019-12-06 | Wireless charging device and wireless charging method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI810837B (en) * | 2022-02-21 | 2023-08-01 | 大陸商環鴻電子(昆山)有限公司 | Contactless connection interface of portable device and operating method thereof |
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| CN104868572A (en) * | 2015-06-08 | 2015-08-26 | 京东方科技集团股份有限公司 | Wireless charging system and method |
| CN105790393A (en) * | 2016-03-15 | 2016-07-20 | 朱得亚 | Wireless charging control system |
| CN106797140A (en) * | 2015-09-10 | 2017-05-31 | 松下知识产权经营株式会社 | Wireless power transmission system and power transmission device |
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2019
- 2019-12-06 CN CN201911243681.3A patent/CN112928786A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868572A (en) * | 2015-06-08 | 2015-08-26 | 京东方科技集团股份有限公司 | Wireless charging system and method |
| CN106797140A (en) * | 2015-09-10 | 2017-05-31 | 松下知识产权经营株式会社 | Wireless power transmission system and power transmission device |
| CN105790393A (en) * | 2016-03-15 | 2016-07-20 | 朱得亚 | Wireless charging control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI810837B (en) * | 2022-02-21 | 2023-08-01 | 大陸商環鴻電子(昆山)有限公司 | Contactless connection interface of portable device and operating method thereof |
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