CN108808882B - Wireless power supply control device and method - Google Patents
Wireless power supply control device and method Download PDFInfo
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- CN108808882B CN108808882B CN201810780540.4A CN201810780540A CN108808882B CN 108808882 B CN108808882 B CN 108808882B CN 201810780540 A CN201810780540 A CN 201810780540A CN 108808882 B CN108808882 B CN 108808882B
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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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- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a wireless power supply control device and a wireless power supply control method, wherein the wireless power supply control device comprises a wireless receiving end and a wireless transmitting end, wherein the wireless receiving end comprises a voltage detection circuit, a dummy load switch circuit, a processor and a battery end; the voltage detection circuit is connected with the battery end and used for detecting voltage information of the battery end and sending the voltage information to the processor; the processor respectively collects the AD values of the voltage detection circuit, and controls the dummy load switch circuit to act when the voltage information of the battery end is detected to be higher than the preset voltage, so that the dummy load is connected to the wireless receiving end, and the battery end is disconnected; the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition. The invention can make the transmitting terminal subjectively power off when the battery is suddenly disconnected or fully charged under the condition that the transmitting terminal and the receiving terminal are not communicated, thereby protecting the battery and the receiving terminal device and realizing the open-loop control of the wireless charging system.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless power supply control device and method.
Background
At present, after a battery of a receiving end of a wireless charging system is suddenly disconnected or charging is completed, a main power supply of a transmitting end is cut off through wireless communication modes such as Bluetooth and WiFi, equipment operation is stopped, and closed-loop control of the equipment is achieved. However, in some situations where wireless communication cannot be performed, the subjective power-off of the transmitting terminal cannot be realized through the closed-loop control mode, so that the diode of the rectifying part is damaged due to large voltage bearing in a state that the battery of the receiving terminal is suddenly disconnected, or the battery is damaged due to overcharging of the battery under the condition that the main power supply cannot be turned off after the battery of the receiving terminal is charged.
Therefore, the conventional wireless charging system cannot control the transmitting terminal to stop charging when the charging of the battery terminal is completed or the battery terminal is suddenly disconnected under the condition that wireless communication is not performed, so that the device or the battery is damaged.
Disclosure of Invention
In view of the above, the present invention is directed to a wireless power control apparatus and method, which can perform subjective power-off of a transmitting terminal when a battery is suddenly disconnected or fully charged in a state where the transmitting terminal and the receiving terminal are not in communication, so as to protect the battery and the receiving terminal device.
In a first aspect, an embodiment of the present invention provides a wireless power supply control device, including a wireless receiving end and a wireless transmitting end, where the wireless receiving end includes a voltage detection circuit, a dummy load switch circuit, a processor, and a battery; the processor is respectively connected with the voltage detection circuit and the dummy load switch circuit, and the voltage detection circuit is connected with the battery;
the voltage detection circuit is connected with the battery end and used for detecting voltage information of the battery end and sending the voltage information to the processor;
the processor is used for controlling the dummy load switching circuit to act when the voltage information of the battery end is higher than a preset voltage, so that a dummy load is connected to the wireless receiving end and the battery end is disconnected;
and the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the voltage detection circuit includes a voltage follower, and a voltage dividing resistor R1 and a voltage dividing resistor R2 that are connected in parallel to the battery end;
the voltage follower collects voltage information between the R1 and the R2 and sends the voltage information between the R1 and the R2 to the processor.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the dummy load switch circuit includes a dummy resistor connected in parallel to the battery terminal and a first switch connected in series to the dummy resistor, and the battery terminal is connected to one end of the dummy resistor through a second switch.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the processor is further configured to control the first switch to be closed when the voltage information of the battery end is higher than the preset voltage, and control the second switch to be opened after a preset time.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the wireless receiving end further includes a receiving coil and a rectifying and filtering circuit connected to the receiving coil, and the rectifying and filtering circuit is connected to the dummy load switch circuit.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the wireless transmitting end includes an inverter circuit;
the wireless transmitting end is used for detecting the phase difference of the voltage and the current output by the inverter circuit when the dummy load is connected to the wireless receiving end and the battery end is disconnected, and stopping charging when the phase difference meets a preset condition.
With reference to the fifth possible implementation manner of the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the preset condition is that the phase difference is greater than a preset value and is an abrupt change.
With reference to the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, where the processor includes a single chip microcomputer.
In a second aspect, an embodiment of the present invention further provides a wireless power supply control method using the wireless power supply control apparatus, including:
detecting voltage information of a battery terminal;
when the voltage information of the battery end is higher than the preset voltage, the dummy load is connected to the wireless receiving end, and the battery end of the wireless receiving end is disconnected;
detecting state change information of a wireless transmitting terminal;
and stopping charging when the state change information meets a preset condition.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the detecting state change information of the wireless transmitting end includes:
and detecting the phase difference of the voltage and the current output by the inverter circuit of the wireless transmitting terminal.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a wireless power supply control device and a wireless power supply control method, which comprise a wireless receiving end and a wireless transmitting end, wherein the wireless receiving end comprises a voltage detection circuit, a dummy load switch circuit, a processor and a battery end; the processor is respectively connected with the voltage detection circuit and the dummy load switch circuit, and the voltage detection circuit is connected with the battery end; the voltage detection circuit is connected with the battery end and used for detecting voltage information of the battery end and sending the voltage information to the processor; the processor is used for controlling the dummy load switch circuit to act when the voltage information of the battery end is higher than the preset voltage so as to connect the dummy load to the wireless receiving end and disconnect the battery end; the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition. Under the condition that the transmitting end and the receiving end are not communicated, the transmitting end can be subjectively powered off when the battery is suddenly disconnected or fully charged, so that the battery and the receiving end device are protected.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a wireless power supply control device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a wireless power supply control device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wireless power supply system according to an embodiment of the present invention;
fig. 4 is a flowchart of a wireless power supply control method according to an embodiment of the present invention.
Icon: 10-a voltage detection circuit; 20-dummy load switch circuit; 30-a processor; 40-battery.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, under the condition that wireless communication is not performed under the condition of the existing wireless charging system, the transmitting terminal cannot be controlled to stop charging when charging of the battery terminal is completed or the battery terminal is suddenly disconnected, so that devices or batteries are damaged, and the like. Based on this, the wireless power supply control device and method provided by the embodiments of the present invention can, in a state where the transmitting end and the receiving end are not in communication, cause the transmitting end to be subjectively powered off when the battery is suddenly disconnected or fully charged, thereby protecting the battery and the receiving end device.
For the convenience of understanding the present embodiment, a detailed description will be given to a wireless power supply control device disclosed in the present embodiment.
Fig. 1 shows a schematic diagram of a wireless power supply control device according to an embodiment of the present invention.
As shown in fig. 1, the present embodiment provides a wireless power supply control device, which includes a wireless receiving end and a wireless transmitting end, wherein the wireless receiving end includes a voltage detection circuit 10, a dummy load switch circuit 20, a processor 30 and a battery 40; the processor 30 is respectively connected with the voltage detection circuit 10 and the dummy load switch circuit 20, and the voltage detection circuit 10 is connected with the battery 40;
the voltage detection circuit 10 is connected with the battery and used for detecting the voltage information of the battery end and sending the voltage information to the processor 30;
the processor 30 is used for controlling the dummy load switch circuit 20 to act when the voltage information of the battery end is higher than the preset voltage, so as to connect the dummy load to the wireless receiving end and disconnect the battery end;
optionally, the processor 30 is a single chip microcomputer.
And the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition.
Specifically, a voltage detection circuit 10 is added at the wireless receiving end, and the three states of battery charging are trickle charging, constant current charging and constant voltage charging. When the battery reaches constant voltage charging, the system current is relatively small, at this time, the voltage detection circuit 10 detects voltage information of the battery end, when the voltage information is higher than a preset threshold value, the battery charging is completed or the battery needs to be disconnected, the detected voltage information is returned to the processor 30, the processor 30 controls the dummy load switch circuit 20 to switch the dummy load R into the system, at this time, because the output end is connected with the battery pack, the voltage at the two ends of the dummy load R is clamped by the battery voltage, and the voltage is the battery voltage. Because the system is converted from the capacitive load to the resistive load, the state of the circuit of the wireless transmitting terminal changes, and the wireless transmitting terminal can judge that the battery is disconnected or the battery is charged according to the state change, so that the wireless transmitting terminal can be powered off subjectively, and the damage of a device caused by the sudden disconnection of the battery or the damage of the battery caused by the overcharge of the battery at a wireless receiving terminal is prevented.
Specifically, the wireless transmitting end can determine the state of the wireless receiving end by detecting the phase of the voltage and the current. If the voltage current phase difference is larger than the preset threshold value, the wireless transmitting end considers that the wireless receiving end battery is full or the battery is disconnected, so that the subjective power failure can be realized, the device and the battery can be protected, and the open-loop control of the wireless power supply system is realized.
As shown in fig. 2, the wireless receiving end further includes a receiving coil and a rectifying and filtering circuit connected to the receiving coil, and the rectifying and filtering circuit is connected to the dummy load switch circuit 20. The dummy load switch circuit 20 includes a dummy resistor R connected in parallel with a battery terminal connected to one end of the dummy resistor R through a second switch K2, and a first switch K1 connected in series with the dummy resistor R. The processor 30 is further configured to control the first switch K1 to be closed when the voltage information of the battery terminal is higher than a preset voltage, and control the second switch K2 to be opened after a preset time.
Specifically, the voltage detection circuit 10 includes a voltage follower B, and a voltage dividing resistor R1 and a voltage dividing resistor R2 connected in parallel to the battery terminal; the voltage follower B collects voltage information between R1 and R2 and sends the voltage information between R1 and R2 to the processor 30. The voltage U between R1 and R2 is divided by R1 and R2 resistorsB(+) -R2/(R1 + R2) × Uout, fed back to the processor 30 through the voltage followers, the processor collects ad (analog to digital) values of the voltage followers respectively, according to UBThe value of (+) and R1 and R2 can calculate the voltage of the battery terminal, the processor 30 determines that if the feedback value is greater than a preset value, the first switch K1 is closed, the dummy load is switched into the system (the power resistor is selected for the resistor at the position), after a preset time (for example, 2S), the K2 is opened, and the battery is opened.
As shown in fig. 3, the wireless power supply system adopts an LCL-LCL topology, and the current Ip on the inductor Lp of the wireless transmitting terminal is calculated by the formula (1):
Ip＝J(M/w*Lp*Ls)*Uout (1)
wherein J is a twiddle factor; m is a mutual inductance value; and w is the angular frequency of the wireless power supply system.
From the equation (1), it can be seen that the magnitude of the current Ip at LP is related to the output voltage Uout of the wireless receiving end, so when the output voltage of the wireless receiving end changes Uout, the current Ip at LP also changes. Therefore, when the second switch K2 is turned off and the dummy load R is connected and the battery is disconnected, the voltage across the dummy load R is Uout, and Uout will rise, and IP will suddenly increase, and at this time, the wireless transmitting end can determine that the status of the wireless receiving end is battery disconnected or battery charging is completed.
The wireless transmitting end comprises an inverter circuit, the system is converted from a capacitive load to a resistive load after the dummy load R is connected, and the phase of voltage and current output by the wireless transmitting end in an inverting mode is changed. The wireless transmitting terminal is used for detecting the phase difference of the voltage and the current output by the inverter circuit when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the phase difference meets the preset condition. The preset conditions are that the phase difference is greater than a preset value and is an abrupt change. The wireless transmitting end considers that the charging of the wireless receiving end is completed or the battery end is disconnected due to faults, the transmitting end disconnects the main power supply and does not provide energy for the receiving coil any more, and therefore the battery and the receiving end device are protected.
As shown in fig. 4, the present embodiment further provides a wireless power supply control method using the wireless power supply control apparatus, including the following steps:
step S101, detecting voltage information of a battery end;
step S102, when the voltage information of the battery end is higher than the preset voltage, the dummy load is connected to the wireless receiving end, and the battery end of the wireless receiving end is disconnected;
step S103, detecting state change information of a wireless transmitting terminal;
and step S104, stopping charging when the state change information meets the preset condition.
Specifically, the phase difference of the voltage and the current output by the inverter circuit of the wireless transmitting end is detected, when the phase difference is larger than a preset value and is a sudden change, the wireless transmitting end considers that the charging of the wireless receiving end is completed or the battery end is disconnected due to faults, the transmitting end disconnects a main power supply and does not provide energy for the receiving coil any more, and therefore the battery and receiving end devices are protected.
The wireless power supply control method provided by the embodiment of the invention has the same technical characteristics as the wireless power supply control device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention provides a wireless power supply control device and a wireless power supply control method, which comprise a wireless receiving end and a wireless transmitting end, wherein the wireless receiving end comprises a voltage detection circuit, a dummy load switch circuit, a processor and a battery end; the processor is respectively connected with the voltage detection circuit and the dummy load switch circuit, and the voltage detection circuit is connected with the battery end; the voltage detection circuit is connected with the battery end and used for detecting voltage information of the battery end and sending the voltage information to the processor; the processor is used for controlling the dummy load switch circuit to act when the voltage information of the battery end is higher than the preset voltage so as to connect the dummy load to the wireless receiving end and disconnect the battery end; the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition. Under the condition that the transmitting end and the receiving end are not communicated, the transmitting end can be subjectively powered off when the battery is suddenly disconnected or fully charged, so that the battery and the receiving end device are protected.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A wireless power supply control device is characterized by comprising a wireless receiving end and a wireless transmitting end, wherein the wireless receiving end comprises a voltage detection circuit, a dummy load switch circuit, a processor and a battery; the processor is respectively connected with the voltage detection circuit and the dummy load switch circuit, and the voltage detection circuit is connected with the battery;
the voltage detection circuit is connected with the battery and used for detecting voltage information of a battery end and sending the voltage information to the processor;
the processor is used for controlling the dummy load switching circuit to act when the voltage information of the battery end is higher than a preset voltage, so that a dummy load is connected to the wireless receiving end and the battery end is disconnected;
and the wireless transmitting terminal is used for detecting the state change information of the circuit of the wireless transmitting terminal when the dummy load is connected to the wireless receiving terminal and the battery terminal is disconnected, and stopping charging when the state change information meets the preset condition.
2. The apparatus of claim 1, wherein the voltage detection circuit comprises a voltage follower and a voltage dividing resistor R1 and a voltage dividing resistor R2 connected in parallel with the battery terminal;
the voltage follower collects voltage information between the R1 and the R2 and sends the voltage information between the R1 and the R2 to the processor.
3. The apparatus of claim 1, wherein the dummy switch circuit comprises a dummy resistor connected in parallel with the battery terminal and a first switch connected in series with the dummy resistor, the battery terminal being connected to one end of the dummy resistor through a second switch.
4. The apparatus of claim 3, wherein the processor is further configured to control the first switch to be closed when the voltage information of the battery terminal is higher than the preset voltage, and to control the second switch to be opened after a preset time.
5. The apparatus of claim 1, wherein the wireless receiving end further comprises a receiving coil and a rectifying and filtering circuit connected to the receiving coil, and the rectifying and filtering circuit is connected to the dummy load switch circuit.
6. The apparatus of claim 1, wherein the wireless transmitting end comprises an inverter circuit;
the wireless transmitting end is used for detecting the phase difference of the voltage and the current output by the inverter circuit when the dummy load is connected to the wireless receiving end and the battery end is disconnected, and stopping charging when the phase difference meets a preset condition.
7. The apparatus according to claim 6, wherein the preset condition is that the phase difference is greater than a preset value and is an abrupt change.
8. The apparatus of claim 7, wherein the processor comprises a single-chip microcomputer.
9. A wireless power supply control method to which the wireless power supply control apparatus according to any one of claims 1 to 8 is applied, comprising:
detecting voltage information of a battery terminal;
when the voltage information of the battery end is higher than the preset voltage, the dummy load is connected to the wireless receiving end, and the battery end of the wireless receiving end is disconnected;
detecting state change information of a wireless transmitting terminal;
and stopping charging when the state change information meets a preset condition.
10. The method of claim 9, wherein the wireless transmitting end comprises an inverter circuit, and wherein the detecting the state change information of the wireless transmitting end comprises:
and detecting the phase difference of the voltage and the current output by the inverter circuit of the wireless transmitting terminal.
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| JP4847891B2 (en) * | 2007-02-20 | 2011-12-28 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | Portable electronic devices |
| JP6186373B2 (en) * | 2011-12-22 | 2017-08-23 | ハンリム ポステック カンパニー リミテッド | Wireless power transmission device and wireless power signal transmission control method in wireless power transmission device |
| JP5976516B2 (en) * | 2012-12-12 | 2016-08-23 | 三洋電機株式会社 | Contactless charging method |
| KR101579713B1 (en) * | 2013-03-29 | 2015-12-22 | 닛산 지도우샤 가부시키가이샤 | Non-contact power supply system |
| JP6127668B2 (en) * | 2013-04-08 | 2017-05-17 | ソニー株式会社 | Electronic equipment and power supply system |
| CN104124780A (en) * | 2013-04-28 | 2014-10-29 | 海尔集团技术研发中心 | Method and device for identifying payload |
| CN105264744B (en) * | 2013-06-05 | 2018-03-06 | 三星电子株式会社 | The method that the load change for detecting it is generated in wireless power receiving unit and wireless charging |
| WO2018072209A1 (en) * | 2016-10-21 | 2018-04-26 | 北京小米移动软件有限公司 | Charging method and electronic device |
| CN206272347U (en) * | 2016-12-05 | 2017-06-20 | 青岛鲁渝能源科技有限公司 | Radio energy transmission system with abnormal state protection function |
| CN207504649U (en) * | 2017-10-16 | 2018-06-15 | 广州大学 | A kind of wireless charging device |
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Effective date of registration: 20210325 Address after: 518000 room 133-134, No.1 International Students (Longgang) Pioneer Park, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Patentee after: ZONECHARGE (SHENZHEN) WIRELESS POWER SUPPLY TECHNOLOGY Co.,Ltd. Address before: 264000 Mingda West Road, Laishan District, Yantai, Shandong Province, No. 11 Patentee before: ZHONG HUI POWERISE WIRELESS POWER TECHNOLOGY Ltd. |