CN108258816A - A kind of wireless charging receiving module and wireless charging system - Google Patents
A kind of wireless charging receiving module and wireless charging system Download PDFInfo
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- CN108258816A CN108258816A CN201810082904.1A CN201810082904A CN108258816A CN 108258816 A CN108258816 A CN 108258816A CN 201810082904 A CN201810082904 A CN 201810082904A CN 108258816 A CN108258816 A CN 108258816A
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- wireless charging
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- receiving module
- impedance matching
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- 238000007600 charging Methods 0.000 title claims abstract description 72
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
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Classifications
-
- 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
-
- H02J7/025—
Abstract
The embodiment of the invention discloses a kind of wireless charging receiving module and wireless charging systems.Wherein, wireless charging receiving module includes：Reception antenna, impedance matching unit, rectification unit and Power Management Unit；The reception antenna is used to receive electromagnetic wave signal；The impedance matching unit is electrically connected with the reception antenna, reaches maximum power transfer for passing through the impedance matching electromagnetic wave signal；The rectification unit is electrically connected with the impedance matching unit, for the electromagnetic wave signal to be converted to direct current signal；The Power Management Unit is electrically connected with the rectification unit, for being amplified the direct current signal so that load uses.Technical solution provided in an embodiment of the present invention can solve the problem of that existing wearable device wireless charging exists apart from limited charge position and limit.
Description
Technical field
The present embodiments relate to wireless charging technical field more particularly to a kind of wireless charging receiving modules and wireless charging
Electric system.
Background technology
Existing wearable device is favored because powerful by more and more users.For wearable device,
How appropriate maximum challenge is, convenient for their continued powers, and for many at present bracelet and watch design,
User must first take off them, and being inserted on wired charger could charge, and charging is more troublesome.
To solve the above-mentioned problems, many products employ induction charging scheme.The program utilizes resonance coil
Conduct electric energy.Specifically, setting transmit coil in charger, receiving coil is set on wearable device, by sending
Coil applies the electric current of variation to generate electromagnetic field variation, the electromagnetic field couples of variation to receiving coil so that receiving coil produces
Raw charging current or charging voltage, so as to fulfill the wireless charging to wearable device.For example, iWatch employs electromagnetism
Inductive charging scheme.
But the distance that electromagnetic induction can act on is extremely limited, generally grade or Centimeter Level, therefore user
There is still a need for wearable device is taken off, it is put into charger and charges up so that the charge position of wearable device has very
Big is restricted.
Invention content
The present invention provides a kind of wireless charging receiving module and wireless charging system, wireless to solve existing wearable device
Charging distance is limited, and charge position has limitation.
In a first aspect, an embodiment of the present invention provides a kind of wireless charging receiving module, including：Reception antenna, impedance
With unit, rectification unit and Power Management Unit；
The reception antenna is used to receive electromagnetic wave signal；
The impedance matching unit is electrically connected with the reception antenna, for passing through the impedance matching electromagnetic wave letter
Number reach maximum power transfer；
The rectification unit is electrically connected with the impedance matching unit, for the electromagnetic wave signal to be converted to direct current letter
Number；
The Power Management Unit is electrically connected with the rectification unit, for being amplified the direct current signal for negative
It carries and uses.
Second aspect, the embodiment of the present invention additionally provide a kind of wireless charging system, including wireless charger and at least
Wireless charging receiving module described in one any embodiment of the present invention.
Wireless charging receiving module provided in an embodiment of the present invention, including reception antenna, impedance matching unit, rectification unit
And Power Management Unit.For receiving electromagnetic wave signal, impedance matching unit is electrically connected reception antenna with reception antenna, works as resistance
When the impedance value of anti-unit matches with reception antenna, electromagnetic wave signal is enabled to reach maximum power transfer effect, rectification
Unit is electrically connected with impedance unit, for electromagnetic wave signal to be converted to direct current signal, then by Power Management Unit by direct current
Signal, which is amplified, is processed for load use so that charging equipment can be realized longer-distance wireless by reception antenna
Charging solves existing wearable device wireless charging apart from limited, and charge position there are problems that limiting.
Description of the drawings
Fig. 1 is a kind of structure diagram of wireless charging receiving module provided in an embodiment of the present invention；
Fig. 2 is the structure diagram of another wireless charging module provided in an embodiment of the present invention；
Fig. 3 is the input signal of rectification unit provided in an embodiment of the present invention and the waveform diagram of output signal；
Fig. 4 is a kind of structure diagram of wireless charging system provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrated only in description, attached drawing.
The embodiment of the present invention provides a kind of wireless charging receiving module, and with reference to figure 1, Fig. 1 is provided in an embodiment of the present invention
A kind of structure diagram of wireless charging receiving module, the wireless charging receiving module include：Reception antenna 11, impedance matching list
Member 12, rectification unit 13 and Power Management Unit 14；
Reception antenna 11 is used to receive electromagnetic wave signal；
Impedance matching unit 12 is electrically connected with reception antenna 11, is reached most for passing through impedance matching electromagnetic wave signal
High power transmission；
Rectification unit 13 is electrically connected with impedance matching unit 12, for electromagnetic wave signal to be converted to direct current signal；
Power Management Unit 14 is electrically connected with rectification unit 13, for being amplified direct current signal so that load uses.
Wireless charging receiving module in the present embodiment is used to receive electromagnetic wave signal rather than picture by reception antenna 11
Some existing electronic equipments equally conduct electric energy by resonance coil, will be changed by the transmit coil set on charger
Electromagnetic field couples to electronic equipment receiving coil, but transmit coil and receive wiring distance of reaction it is limited, so generally need
Electronic equipment is placed on charger, for example, when electric toothbrush is charged, needs to put electric toothbrush to cradle；Intelligence
Energy wrist-watch charging, which is also required to take smartwatch, to be placed on cradle, and transmit coil is set in cradle, in order to reach
Good energy transmission effect, transmit coil and receiving coil generally set that volume is larger, and flexibility is poor.And make in the present embodiment
The acquisition of energy is realized with reception antenna 11, reception antenna 11 is set on pcb board, small volume, be conducive to reduce equipment into
This, for example, the PCB antenna of 10*10mm can provide the reception power of up to 0.5W.And PCB antenna cost is relatively low, relative to
Volume is big, and cost of manufacture is greatly saved in expensive receiving coil.
Reception antenna 11 then utilizes resonance principle in the present embodiment, is provided with transmission antenna in charger, charger will be electric
Incoming can be sent to antenna, transmission antenna is vibrated with certain vibration frequency, generates electromagnetic wave signal, reception antenna 11 with
Identical vibration frequency is vibrated, then can receive to receive the electromagnetic wave signal and the electromagnetic wave signal is converted to electric signal
It is filled in equipment.
Specifically, reception antenna 11 is identical with the electromagnetic wave signal frequency received, the electromagnetic wave of transmission antenna resonant tank
The formula of opening up comprehensively is diffused in space, and transmission range is up to 2 meters or more so that other than 2 meters away from transmission antenna of reception antenna 11
Also electromagnetic wave signal can be received, also resonance is in the specific frequency in the reception circuit of reception antenna 11, so as to fulfill energy
The transmission of amount after reception antenna 11 receives this electromagnetic wave signal, directly can directly apply the electromagnetic wave signal, example
Such as, can using electromagnetic wave signal as broadcast singal carrier, for propagate the communication information or by the electromagnetic wave signal export to
On radio frequency-direct current transducer, electromagnetic wave signal is converted into direct current signal so that direct current signal is powered electronic equipment.
Wireless charging receiving module further includes impedance matching unit 12, and the energy collection circuit of reception antenna 11 includes two poles
The devices such as pipe, diode inherently nonlinear device, therefore energy collection circuit also show non-linear in itself, it means that
The impedance of energy collection circuit can change with the variation of the frequency of the electromagnetic wave signal received from antenna, when transmission circuit
When the frequency that impedance and antenna receive electromagnetic wave signal matches, the maximum power transfer effect of electromagnetic wave signal can be reached
Fruit.The present embodiment middle impedance matching unit 12 is electrically connected with reception antenna 11, for passing through impedance matching electromagnetic wave signal
Reach maximum power transfer.
Rectification unit 13 is electrically connected with impedance matching unit, for electromagnetic wave signal to be converted to direct current signal, and power supply
Administrative unit 14 is electrically connected with rectification unit 13, for direct current signal to be amplified, so that load uses, because of wireless charging
Module is apart from the distant of charger, then the amplitude of electromagnetic wave signal that may be collected is smaller, and Power Management Unit 14 then may be used
The smaller electromagnetic wave signal of amplitude is acquired, and be amplified, so that load uses.
Wireless charging receiving module provided in an embodiment of the present invention, including reception antenna, impedance matching unit, rectification unit
And Power Management Unit.For receiving electromagnetic wave signal, impedance matching unit is electrically connected reception antenna with reception antenna, works as resistance
When the impedance value of anti-unit matches with reception antenna, electromagnetic wave signal is enabled to reach maximum power transfer effect, rectification
Unit is electrically connected with impedance unit, for electromagnetic wave signal to be converted to direct current signal, then by Power Management Unit by direct current
Signal, which is amplified, is processed for load use so that charging equipment can be realized longer-distance wireless by reception antenna
Charging solves existing wearable device wireless charging apart from limited, and charge position there are problems that limiting.
For smartwatch energy wearable device, without equipment is taken off, it is worn over user and charging can be realized with it,
As long as user is in same interior with charger, the charging of wearable device can be just carried out in real time, if for example, wireless charging receives
The charging distance of module can reach 4.5 meters, then wearable device can charge at any time, and user is not required to deliberately pay attention to wearable set
It is standby whether low battery, do not influence use of the user to wearable device.Similarly, the game terminal in life, mobile phone and flat
Plate computer etc. also can through this embodiment in wireless charging receiving module realize remote wireless charging.
On the basis of above-described embodiment, with reference to figure 2, Fig. 2 is another wireless charging mould provided in an embodiment of the present invention
The structure diagram of block, impedance matching unit 12 can include：First inductance L1 and the first capacitance C1；The first of first inductance L1
Connecting pin is electrically connected with the output terminal of reception antenna 11, and second connection end is electrically connected with the first connecting pin of the first capacitance C1；The
The second connection end of one capacitance C1 is electrically connected with the input terminal of rectification unit 13.
Impedance matching is mainly used on transmission circuit, and load point can be all transmitted to reach the electromagnetic wave signal of all high frequencies
Purpose, hardly have signal reflex and return source point, so as to promote source benefit.
There are two types of impedance matchings：One kind is to change resistivity, and another kind is the wavelength for adjusting transmission line, this implementation is by changing
The mode for becoming resistivity carries out impedance matching.The first inductance L1 and the first capacitance C1 are together in series in the present embodiment, realizes and increases
Add and either reduce the impedance value of load and pass through the first inductance L1 or the first capacitance C1 ground connection, realize that resistance value is zero, i.e.,
Resistivity is become zero and completes impedance matching.During high speed PCB, the reflection of signal in order to prevent, it is desirable that the impedance of circuit is big
About 50 ohm, the present embodiment matches the impedance value, it can be achieved that about 50 ohm by the first inductance L1's and the first capacitance C1.
Optionally, the first connecting pin of the first inductance L1 is grounded by the second capacitance C2.With reference to figure 2, this case is by by
One inductance L1, which is grounded, so that resistivity is zero, realizes impedance matching.Certainly, Fig. 2 is only a kind of example, can also be by the first capacitance
C1 is grounded to realize impedance matching.
Optionally, with reference to figure 2, rectification unit 13 can include：First diode D1 and the second diode D2；One or two pole
Anode of the cathode of pipe D1 respectively with the output terminal of impedance matching unit 12 and the second diode D2 is electrically connected；First diode D1
Plus earth；The cathode of second diode D2 is electrically connected with the input terminal of Power Management Unit 14.
Rectification unit 13 is equivalent to halfwave rectifier, generates half-wave signa as shown in figure 3, Fig. 3 is offer of the embodiment of the present invention
The input signal of rectification unit and the waveform diagram of output signal.Waveform input signal Ui be sinusoidal waveform, output signal
Waveform Uo is half-wave waveform, is equivalent to and negative half-wave waveform is pruned from waveform input signal.Because charging distance is farther out, day is received
The possible intensity of electromagnetic wave signal that line 11 receives is weaker, and the peak value for the current signal that impedance matching unit 12 exports is again smaller than general
Diode conduction threshold.The diode chosen in the present embodiment is the diode just having compared with low turn-on voltage, and entire
Wireless charging module is operated under high-frequency state, needs the diode for using switch time shorter.
Optionally, the first diode D1 and the second diode D2 can be Schottky diode.
Schottky diode is the diode of a metal-semiconductor PN junction, low with switching frequency height and forward voltage drop
The characteristics of, only have 0.15V suitable for the forward voltage drop of high-frequency signal, and Schottky diode, reduce energy loss.
Optionally, the Schottky diode of model HSMS-2822 can be selected in the first diode D1, and the second diode D2 can
Select the Schottky diode of model HSMS-2852, the cut-in voltage of the diode of model HSMS-2822 is 340mV, type
The cut-in voltage of number diode for being HSMS-2852 is 150mV, and the Schottky diode of above-mentioned two model all have compared with
Small firing current, the diode of model HSMS-2822 are suitble to use under the very weak environment of electromagnetic wave energy, model
The diode of HSMS-2852 is suitble to use under the very strong environment of electromagnetic wave energy.And the Schottky two of above-mentioned two model
Pole pipe has higher saturation current, relatively low junction capacity and relatively low equivalent series resistance.So that the first diode D1 and
Second diode D2 can generate better forward current, be conducive to driving load.
Optionally, wireless charging receiving module can also include：Filter unit 15；The input terminal of filter unit 15 and rectification
Unit 13 is electrically connected, and output terminal is electrically connected with Power Management Unit 14, and the direct current signal for being exported to rectification unit 13 carries out
Filtering process.The signal waveform that rectification unit 13 exports is half waves waveform, is realized by filter power supply 15 by half waves waveform
Direct current signal is converted to, then by the DC signal output to Power Management Unit 14 so that Power Management Unit 14 carries out
The driving of storage and the load of electric energy.Illustratively, filter unit 15 include the first filter inductance L2 and respectively with filtering
Inductance L2 and the first filter capacitor C3 of rectification unit output terminal electrical connection.Wherein the first filter inductance L2 is with cored electricity
Sense, can enhance filter effect.In order to reach better filter effect, second can also be arranged in parallel with the first filter capacitor C3
Filter capacitor C4 and third filter capacitor C5.
Optionally, Power Management Unit 14 can include：DC boosting chopper circuit, for export filter unit 15
Direct current signal carries out boosting processing, supply load.Power Management Unit 14 can be the efficient boost charge of model bq25570
Device, the charger have strict requirements to power and operating, for a highly integrated energy acquisition, the Charge Management of millimicro power consumption
Device, passive flow consumption are only 488nA, and 90% efficiency can be achieved in the case where output current is less than 10 μ A, from
And bq25570 can keep high efficiency in the case where output power is extremely low.For example, bq25570 can input voltage down to
Start during 330mV, and once start, can when input voltage is down to 100mV continuous collecting energy, and the boost charge
Device provides MPPT maximum power point tracking function, convenient for controlling power.
Power Management Unit 14 has further included nanoscale power supervisor, ensures the accuracy that voltage is adjusted, passes through Fig. 2 institutes
The voltage value after boosting is adjusted in the resistance R1~R8 shown, obtains accurately voltage value and current value.Eventually by pin
VOUT exports supply voltage, and supply voltage is by the second filter inductance L3, the 4th filter capacitor C6, the 5th filter capacitor C7, the
The filter action of six filter capacitor C8 and the 7th filter capacitor C9 exports accurately load supplying voltage Uout.
The embodiment of the present invention additionally provides a kind of wireless charging system, and with reference to figure 4, Fig. 4 is provided in an embodiment of the present invention
A kind of structure diagram of wireless charging system, the wireless charging system include wireless charger 2 and at least one present invention
The wireless charging receiving module 1 that any embodiment provides.
The present embodiment can set compatible wireless charging receiving module 1, can be simultaneously to wearable device, mobile phone, tablet
The electronic equipments such as computer charge, because the electromagnetic wave signal that wireless charger 2 emits is dissipated in the form of comprehensive, if the nothing
Micro USB electric appliance 2 can emit 4.5 meters of remote electromagnetic wave signals, then be the center of circle with the wireless charger 2, with 4.5 meters for radius
Electronic equipment in overlay area can receive electromagnetic wave signal.Wireless charger 2 can be made to connect multiple wireless chargings to receive
Module 1, each electronic equipment are embedded with wireless charging receiving module 1, then wireless charger 2 can be the institute in overlay area
There is electronic equipment to charge, can realize the lasting confession to electronic equipment while not influencing the use of user whenever and wherever possible
Electricity so that electronic equipment charge when position it is unrestricted, be not required to plug charging wire, and the wireless charging system cost of implementation compared with
It is low, small volume.
Optionally, with reference to figure 4, wireless charger 2 can include：Transmitting antenna 21；Transmitting antenna 21 and at least one nothing
11 electromagnetism of the reception antenna connection of micro USB electricity receiving module 1, for sending electromagnetic wave signal to reception antenna 11.The present embodiment institute
The scheme stated causes a wireless charger 2 to charge for multiple electronic equipments, and can be continuously power electronic equipment, then user can
Persistently using electronic equipment, offer convenience for user's life.
Specifically, having further included modulation module in wireless charger 2, modulation module includes control circuit for pulse-width modulation and electricity
Wave generator, for generating electric wave signal, control circuit for pulse-width modulation is used to send out electric wave signal electric wave signal generator
Raw device is controlled, so as to which the electric wave signal to wave generator output carries out the adjusting of amplitude and frequency.
Wireless charger 2 further includes resonant capacitance, and the resonant capacitance is arranged in parallel with transmitting antenna 21, for above-mentioned
Composition resonance circuit under the control of the electric wave signal of generation, obtains electromagnetic wave signal, and passes through transmitting antenna 21 to the electromagnetic wave
Signal is emitted.
Note that it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiment described here, can carry out for a person skilled in the art various apparent variations,
It readjusts, be combined with each other and substitutes without departing from protection scope of the present invention.Therefore, although by above example to this
Invention is described in further detail, but the present invention is not limited only to above example, is not departing from present inventive concept
In the case of, other more equivalent embodiments can also be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of wireless charging receiving module, which is characterized in that including：Reception antenna, impedance matching unit, rectification unit and
Power Management Unit；
The reception antenna is used to receive electromagnetic wave signal；
The impedance matching unit is electrically connected with the reception antenna, is reached for passing through the impedance matching electromagnetic wave signal
To maximum power transfer；
The rectification unit is electrically connected with the impedance matching unit, for the electromagnetic wave signal to be converted to direct current signal；
The Power Management Unit is electrically connected with the rectification unit, for being amplified the direct current signal so that load makes
With.
2. wireless charging receiving module according to claim 1, which is characterized in that the impedance matching unit includes：The
One inductance and the first capacitance；
First connecting pin of first inductance is electrically connected with the output terminal of the reception antenna, second connection end and described first
The first connecting pin electrical connection of capacitance；
The second connection end of first capacitance is electrically connected with the input terminal of the rectification unit.
3. wireless charging receiving module according to claim 2, it is characterised in that：
First connecting pin of first inductance passes through the second capacity earth.
4. wireless charging receiving module according to claim 1, which is characterized in that the rectification unit includes：One or two
Pole pipe and the second diode；
The cathode of first diode respectively with the output terminal of the impedance matching unit and the anode of second diode
Electrical connection；The plus earth of first diode；
The cathode of second diode is electrically connected with the input terminal of the Power Management Unit.
5. wireless charging receiving module according to claim 4, it is characterised in that：
First diode and second diode are Schottky diode.
6. wireless charging receiving module according to claim 1, which is characterized in that further include：Filter unit；
The input terminal of the filter unit is electrically connected with the rectification unit, and output terminal is electrically connected with the Power Management Unit,
Direct current signal for being exported to the rectification unit is filtered.
7. wireless charging receiving module according to claim 6, which is characterized in that the filter unit includes：Third electricity
Hold and the second inductance；
First connecting pin of the third capacitance the first connecting pin with the output terminal of the rectification unit and the second inductance respectively
Electrical connection, second connection end ground connection；
The second connection end of second inductance is electrically connected with the input terminal of the Power Management Unit.
8. wireless charging receiving module according to claim 1, which is characterized in that the Power Management Unit includes：Directly
Flow boost chopper.
9. a kind of wireless charging system, which is characterized in that including wireless charger and at least one such as the claims 1-
8 any one of them wireless charging receiving modules.
10. wireless charging system according to claim 9, which is characterized in that the wireless charger includes：Emit day
Line；
The transmitting antenna is connect with the reception antenna electromagnetism of at least one wireless charging receiving module, for sending electromagnetism
Wave signal is to the reception antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810082904.1A CN108258816A (en) | 2018-01-29 | 2018-01-29 | A kind of wireless charging receiving module and wireless charging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810082904.1A CN108258816A (en) | 2018-01-29 | 2018-01-29 | A kind of wireless charging receiving module and wireless charging system |
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| CN201810082904.1A Pending CN108258816A (en) | 2018-01-29 | 2018-01-29 | A kind of wireless charging receiving module and wireless charging system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130603A (en) * | 2019-12-06 | 2020-05-08 | 杭州电子科技大学 | WiFi energy acquisition circuit |
| CN112713665A (en) * | 2019-10-24 | 2021-04-27 | 王钦戊 | Wireless charger for microwave power conversion and energy storage |
| CN112769252A (en) * | 2020-12-31 | 2021-05-07 | 华乙半导体(深圳)有限公司 | Wireless charging device and method and central processing unit |
| CN117134518A (en) * | 2023-09-07 | 2023-11-28 | 上海敦荣信息科技有限公司 | Wireless energy collection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366916A (en) * | 2012-03-31 | 2013-10-23 | 深圳光启创新技术有限公司 | Wireless energy receiving coil and wireless energy transmission system |
| CN205829320U (en) * | 2016-07-22 | 2016-12-21 | 桂林电子科技大学 | A kind of magnet coupled resonant type wireless energy transmission system |
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2018
- 2018-01-29 CN CN201810082904.1A patent/CN108258816A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366916A (en) * | 2012-03-31 | 2013-10-23 | 深圳光启创新技术有限公司 | Wireless energy receiving coil and wireless energy transmission system |
| CN205829320U (en) * | 2016-07-22 | 2016-12-21 | 桂林电子科技大学 | A kind of magnet coupled resonant type wireless energy transmission system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713665A (en) * | 2019-10-24 | 2021-04-27 | 王钦戊 | Wireless charger for microwave power conversion and energy storage |
| CN111130603A (en) * | 2019-12-06 | 2020-05-08 | 杭州电子科技大学 | WiFi energy acquisition circuit |
| CN112769252A (en) * | 2020-12-31 | 2021-05-07 | 华乙半导体(深圳)有限公司 | Wireless charging device and method and central processing unit |
| CN112769252B (en) * | 2020-12-31 | 2023-05-05 | 华乙半导体(深圳)有限公司 | Wireless charging device, method and central processing unit |
| CN117134518A (en) * | 2023-09-07 | 2023-11-28 | 上海敦荣信息科技有限公司 | Wireless energy collection device |
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Application publication date: 20180706 |