CN108711945A - A kind of multi-coil wireless charging device and method - Google Patents
A kind of multi-coil wireless charging device and method Download PDFInfo
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- CN108711945A CN108711945A CN201810696563.7A CN201810696563A CN108711945A CN 108711945 A CN108711945 A CN 108711945A CN 201810696563 A CN201810696563 A CN 201810696563A CN 108711945 A CN108711945 A CN 108711945A
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Classifications
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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
-
- 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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- 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
-
- 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
- H02J7/00304—Overcurrent protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of multi-coil wireless charging device and method, including several coils, each coil possesses unique number, if coil is divided into dried layer, each layer line circle is several and there is blind area, the blind area to have the coil of other layers to fill up, and each coil is connect by corresponding wire jumper with power supply unit.Terminal may be implemented under different placement positions by the equipment efficiently to charge.
Description
Technical field
The present invention relates to a kind of wireless charging technology, especially a kind of multi-coil wireless charging device and method.
Background technology
With the development of technology, the prior art of the wireless charging of electronic mobile device is to realize electricity by electromagnetic induction
Coupling of the position of the coil of the wireless transmission of energy, the wireless charging based on electromagnetic induction, transmitting terminal and receiving terminal to coil
It influences very big and then very high to the status requirement of the receiving terminal of wireless charging.Therefore, the mistake of transmitting end-coil and reception end-coil
Position significantly influences charge efficiency, and existing wireless charger only can not exist to receiving coil there are one transmitting coil
The equipment of different location charges.
Invention content
It, can be with by the device and method the purpose of the present invention is to provide a kind of multi-coil wireless charging device and method
It realizes that terminal efficiently charges under different placement positions, can also realize charging of the charging equipment to multiple terminals.
Realize that the technical solution of the object of the invention is：A kind of multi-coil wireless charging device, including several coils, each line
Circle possesses unique number, if coil is divided into dried layer, each layer line circle is several and has blind area, which has the coil of other layers to fill out
It mends, each coil is connect by corresponding wire jumper with power supply unit.
Using above equipment, region is divided to all coils, one moment of coil in the same area, only there are one coils
It works, the coil synchronization in different zones can work at the same time.
Using above equipment, the different coil time-sharing works in the same area.
A kind of multi-coil wireless charging method, when terminal is positioned on a certain coil, charging process includes：Using repeating query
Mode detection coil coupled signal, detect whether the coil adjacent windings also have coupled signal if having coupled signal；To depositing
Coil transmissions power is obtained in the coil of coupled signal；It obtains terminal and receives power；It obtains and receives power and each transmission power
Between difference.The only corresponding coil power supply of minimal difference.
Using the above method, region is divided to all coils, when different terminals are positioned on the different coils of the same area
When, the only corresponding coil power supply of minimal difference be changed to for difference first it is small and the second small corresponding coil carries out timesharing confession
Electricity.
Using the above method, divide region to all coils is when different terminals are positioned on the coil of different zones
The corresponding coil of minimal difference in each region is powered simultaneously.
Compared with prior art, the present invention haing the following advantages：(1) wireless charging device includes several layer line circles, each
Layer line circle it is in varying numbers, and all layer line circles are combined there is no blind area, for the different placement position of terminal, always
There can be an ideal coil to power for terminal；(2) terminal closed on to the comparison put, the equipment is by the way of timesharing pair
Terminal carries out rotation charging, interfering with each other between reducing while charging；(3) to putting terminal relatively far away from, which can
To be carried out at the same time charging, charge efficiency is improved.
The invention will be further described with reference to the accompanying drawings of the specification.
Description of the drawings
Fig. 1 is charhing unit external structure schematic diagram of the present invention.
Fig. 2 is charhing unit decomposition diagram of the present invention.
Fig. 3 is coil combination schematic diagram.
Fig. 4 is wireless charging control unit of the present invention, charhing unit and a line combination schematic diagram.
Fig. 5 is the coil schematic diagram of an embodiment of the present invention.
Fig. 6 is the effective coverage schematic diagram of Fig. 4 first layers coil and third layer coil combination.
Fig. 7 is the blind area schematic diagram of Fig. 4 first layers coil and third layer coil combination.
Fig. 8 is Sa Si once coil combination schematic diagrames in Fig. 4.
Fig. 9 is Fig. 4 embodiment wire jumper artworks.
Figure 10 is that coil is divided into two region A, B schematic diagrames.
Specific implementation mode
Multi-coil wireless charging device of the present invention utilizes the Tx coils in equipment and Rx coils in terminal to be charged
Between electromagnetic induction principle, pass through coil carry out energy coupling realize energy transmission.
Coil of the present invention is not the circle only as mentioned in attached drawing, or rectangular or polygon, but circle
The coil of shape coupling area under same consumptive material is maximum.
Charging blind area of the present invention is not to be overlapped other than single coil or between multiple coils and not no electromagnetic field
Region.
In conjunction with Fig. 1, Fig. 2, the charhing unit of a kind of multi-coil wireless charging device, the equipment includes several coils, upper cover
17, pedestal 18 and holder 19.
The bottom surface of upper cover 17 and pedestal 18 is arranged in parallel and surrounds the inner cavity of bearing support 19, and holder 19 is fixed on the inner cavity
In.
Several coils are set on holder, and each coil is connect by wire jumper with external powering device.
Several coil layering settings, the number of coils of each layer of laying are not exactly the same.There are blind between each layer line circle
Area, the blind area are filled up by the coil of other layers.
In conjunction with Fig. 3, it is as follows that a kind of coil of the invention lays mode：
(1) each layer line circle is not overlapped；
(2) it is projected in upper cover 17 or pedestal 18 per layer line circle, is partly weighed between the adjacent windings projection of adjacent layer
It is folded；
(3) non-blind area between coil projection.
If the excessive efficiency of the overlapping area of Tx coils can reduce, if Tx coils overlapping area it is too small easy to produce it is blind
Area.
According to the distribution method of above-mentioned coil, can charge effective district to avoid the wireless charging device only comprising a coil
The small problem in domain can also avoid the problem that there is charging blind area between the only wireless charging device of a line coil.
In conjunction with Figure 10, the projection of all coils is divided region by the present invention.The coil of different zones can power simultaneously,
The coil of same area is only capable of working when wheel.
In conjunction with Fig. 4, the invention also includes wireless charging control unit, set between wireless charging control unit and charhing unit
Set current sense link, coil voltage detection circuit, driver circuit, LC resonance circuit, demodulation circuit, temperature detection circuit, Q values
Detect circuit.
The current detection circuit is to judge work at present loop current value by the electric current of sample streams overpower circuit,
To judge the operating current of circuit whether in normal range (NR), if electric current occurs abnormal, wireless charging control circuit can close
Disconnected charging, achievees the purpose that overcurrent protection.
The coil voltage detection circuit is different if there is coil voltage for detecting the voltage value to work on present coil
Often, wireless charging control circuit can turn off charging, achieve the purpose that protection.
The driver circuit, resonance circuit are configured to the circuit of charhing unit transimission power, by field-effect tube, capacitance and line
Circle composition.
The demodulation circuit demodulates the receiving terminal signal of communication being coupled on coil, and the signal after demodulation is fed back
Give wireless charging control unit.
The temperature detection circuit realizes the real time temperature of detecting product by negative temperature coefficient resister.
Q values detect circuit by judge current temperature if appropriate for product work normally or other abnormalities, when
When the temperature is excessively high, wireless charging control circuit will turn off whole system, to achieve the purpose that temperature protection.
I2C communication interfaces and LED light control circuit is arranged in wireless charging control unit.
Wireless charging control unit carries out real-time communication by I2C communication interfaces and other chips or other products, provides
The current working condition of product and running parameter.
Wireless charging control unit controls LED light on and off by LED control circuits, carrys out display working condition.
Wireless charging control unit and charhing unit cooperate, and complete the purpose to a terminal charge.Specific method
It is as follows：
Step S101, demodulation circuit traverse whether each Tx coils have the Rx coils of terminal to be coupled with the coil；If
It detects a certain coil-induced to after there is Rx coils to be put into, then inquires whether adjacent windings sense Rx coils；
Step S102 obtains the transmission power of all Tx coils for sensing Rx coils；
Terminal where step S103, Rx coil is sent with the communication connection of wireless charging control unit receives power information；
The difference of step S104, obtaining step S104 and step S103 received between power and each transmission power, difference
Minimum indicates the Tx coil efficiency highests；
The Tx coils of step S105, the highest Tx coils number of wireless charging control unit efficiency of selection work,
He is stopped at coil.
In step S101, it is powered for each coil by repeating query, if a certain Tx coils sense Rx coils after being powered, i.e.,
Coupling then sends out signal to circuit is demodulated, and demodulation circuit is demodulated, and it is single that the number of coil is transferred to wireless charging control
Member.
In step S102, the current value and voltage value calculating that circuit obtains are detected by current sense link, coil voltage
Obtain the transmission power of Tx coils.
In step S103, it is desirable that terminal to be charged has the ability that identification receives power calculation, and acquisition is received work(
Rate is sent to wireless charging control unit by I2C communication interfaces.
In step S104, a Tx coil efficiency is high, and representing its transmission power should be the most close with terminal reception power,
That is the centre-of gravity shift of the Rx coils of the terminal Tx coils is minimum.
Charging equipment of the present invention may be implemented to several terminals while power, and charge simultaneously to several terminals
The different terminals for placing adjacent windings can be divided into again to charge, and different terminals is placed to non-conterminous coil and is carried out
Charging.
Terminal to be charged is put into simultaneously to adjacent windings and charges that the specific method is as follows：
Step S201, demodulation circuit traverse whether each Tx coils have the Rx coils of terminal to be coupled with the coil；If
It detects a certain coil-induced to after there is Rx coils to be put into, then inquires whether adjacent windings sense Rx coils；
Step S202 obtains the transmission power of all Tx coils for sensing Rx coils；
Step S203 is communicated to connect with wireless charging control unit to terminal where every Rx coils and is sent the terminal
Received power information；
The difference of step S204, obtaining step S204 and step S203 received between power and each transmission power；
Step S205, the Tx coils that wireless charging control unit selects difference first small and the second small Tx coils are numbered into
Row time-sharing work, other coils are stopped, and coil should be adjacent windings at this time.
In step s 201, it is powered for each coil by repeating query, if a certain Tx coils sense Rx coils after being powered, i.e.,
Coupling then sends out signal to circuit is demodulated, and demodulation circuit is demodulated, and it is single that the number of coil is transferred to wireless charging control
Member.
In step S202, the current value and voltage value calculating that circuit obtains are detected by current sense link, coil voltage
Obtain the transmission power of Tx coils.
In step S203, it is desirable that terminal to be charged has the ability that identification receives power calculation, and acquisition is received work(
Rate is sent to wireless charging control unit by I2C communication interfaces.
In step S204, if the off-centring of the Rx coils of terminal Tx coils corresponding with one is minimum, the Tx
Charge efficiency highest of the coil to the terminal.
In step 205, the time-sharing work is that the Tx coils chosen are energized in turn, is not worked at the same time.Due to adjacent
If the power simultaneously magnetic field of generation of Tx coils have interference, the mechanism that time-sharing charging may be used avoids interfering with each other.
Terminal to be charged is put into simultaneously to non-conterminous coil, that is, different zones and charges that the specific method is as follows：
Step S301, demodulation circuit traverse whether each Tx coils have the Rx coils of terminal to be coupled with the coil；If
It detects a certain coil-induced to after there is Rx coils to be put into, then inquires whether adjacent windings sense Rx coils；
Step S302 obtains the transmission power of all Tx coils for sensing Rx coils；
Step S303 is communicated to connect with wireless charging control unit to terminal where every Rx coils and is sent the terminal
Received power information；
The difference of step S304, obtaining step S304 and step S303 received between power and each transmission power；
Step S305, wireless charging control unit selects difference first small and the Tx coils of the second small Tx coils number are same
Shi Jinhang works, other coils are stopped.
In step S301, it is powered for each coil by repeating query, if a certain Tx coils sense Rx coils after being powered, i.e.,
Coupling then sends out signal to circuit is demodulated, and demodulation circuit is demodulated, and it is single that the number of coil is transferred to wireless charging control
Member.
In step S302, the current value and voltage value calculating that circuit obtains are detected by current sense link, coil voltage
Obtain the transmission power of Tx coils.
In step S303, it is desirable that terminal to be charged has the ability that identification receives power calculation, and acquisition is received work(
Rate is sent to wireless charging control unit by I2C communication interfaces.
In step S304, if the off-centring of the Rx coils of terminal Tx coils corresponding with one is minimum, the Tx
Charge efficiency highest of the coil to the terminal.
It is described to work at the same time the Tx coils chosen while being energized in step 305.
When detecting that metallic foreign body is put into, wireless charging control unit, the stopping pair of wireless charging control unit are given in report
Region is answered to be stopped, non-one's respective area can still work normally.Metal temperature can be detected by temperature detection circuit, to stop
The power supply of the region coil.
Detection environment temperature and coil surface temperature in real time, are reported to processing chip, wireless charging is automatically controlled when an abnormality is discovered
Unit processed takes different treatment mechanisms according to temperature.For example environment temperature is excessively high such as 30 DEG C, is filled using such as 5W low-power modes
Electricity reduces cell-phone heating so that handset processes optimum Working；When the temperature of the surroundings is low as 26 DEG C hereinafter, using being more than
The power of 5W carries out fast charge, shortens the charging time；Enter overheat protector state when coil surface abnormal high temperature, prevents metallic foreign body
It is excessively high to detect failure scenarios underlaying surface temperature.
Embodiment one
A kind of multi-coil wireless charging device, charhing unit include several coils, upper cover 1, pedestal 6 and holder 3.Upper cover
1 and the bottom surface of pedestal 6 be arranged in parallel and surround the inner cavity of bearing support 3,3 one, holder and be fixed in the inner cavity.Coil is set
Set three layers, wherein 6 Tx coils of first layer, 4 Tx coils of the second layer, 6 Tx coils of third layer.
In conjunction with Fig. 5, each Tx coils setting method in first layer coil is as follows：First coil 1 respectively with the second coil 2,
Tertiary coil 3, the 4th coil 4, the 6th coil 6 are tangent, and the second coil 2 and tertiary coil 3 are tangent, the 4th coil 4, the 6th coil
6 is tangent, and the 5th coil 5 and the 4th coil 4, the 6th coil 6 are tangent.Second coil 2, tertiary coil 3 are located at this layer of leftmost side, the
One coil 1 is located at the right side of the second coil 2, and the 4th coil 4, the 6th coil 6 are located at 1 right side of first coil, and the 5th coil 5 is located at
The right side of 4th coil 4.
Each Tx coils setting method in second layer coil is as follows：8th coil 8 and the tenth coil 10 are tangent and be set to
It is between 7th coil 7 and the 9th coil 9 and tangent with the 7th coil 7, the 9th coil 9.
Each Tx coils setting method in third layer coil is as follows：Tenth two coil 12 and the 11st coil the 11, the 13rd
Coil 13 is tangent, and the 11st coil 11 and the tenth three-winding 13 are tangent, the 16th coil 16 and the 11st coil 11, the 13rd line
The 13, the 14th coil 14 of circle, the 16th coil 16 are tangent, and the 14th coil 14 and the 16th coil 16 are tangent.Tenth two coil
12 are located at the leftmost side of this layer, and the 11st coil 11, the tenth three-winding 13 are located at the right side of the tenth two coil 12, the 16th coil
16 are located at the right side of the tenth three-winding 13, and the 14th coil 14, the 16th coil 16 are located at 16 right side of the 16th coil.
Three layers of Tx coils are projected to upper cover 17.Shown in Fig. 6, when first layer coil is combined with the projection of third layer coil,
Shade is overlapping part, which is effective charged area.Have after first layer coil shown in Fig. 7 and third layer coil combination
Blind area everywhere, in figure shown in shade, if the blind area, with the presence of the Rx coils of terminal, charge efficiency is very low.In conjunction with Fig. 8, the second layer
Coil and first layer, third layer coil combination, have filled up blind area.
In conjunction with Fig. 9, first layer coil, second layer coil wire jumper are placed between first layer coil and second layer coil, the
Three layer line circle wire jumpers are placed between second layer coil and third layer coil.
By the design of the present embodiment, in wireless charging, without considering placement position of the terminal in upper cover 17, i.e., eventually
End can be with sideway or vertical pendulum, can be in a certain coil with respect to surface.The overlapping area of lattice coil does not influence a certain work
In coil normal use.
Claims (10)
1. a kind of multi-coil wireless charging device, including several coils, which is characterized in that
Each coil possesses unique number,
If coil is divided into dried layer,
Each layer line circle is several and there is blind area, the blind area to have the coil of other layers to fill up,
Each coil is connect by corresponding wire jumper with power supply unit.
2. equipment according to claim 1, which is characterized in that divide region, the coil in the same area to all coils
One moment, the coil synchronization in different zones can work at the same time only there are one coil working.
3. equipment according to claim 2, which is characterized in that the different coil time-sharing works in the same area.
4. equipment according to claim 1 or 2 or 3, which is characterized in that no overlap region between each layer of coil.
5. equipment according to claim 4, which is characterized in that coil is circular coil and each layer of adjacent windings are tangent.
6. equipment according to claim 1, which is characterized in that coil is set on holder (19), and holder (19) is set to
In the inner cavity surrounded by upper cover (17) and pedestal (18).
7. a kind of charging method using equipment described in claim 1, which is characterized in that when terminal is positioned on a certain coil
When, charging process includes：
The detection coil coupled signal by the way of repeating query, detects whether the coil adjacent windings also have coupling if having coupled signal
Close signal；
To there are the coils of coupled signal to obtain coil transmissions power；
It obtains terminal and receives power；
Obtain the difference received between power and each transmission power.
The only corresponding coil power supply of minimal difference.
8. the method according to the description of claim 7 is characterized in that region is divided to all coils, when different terminals are positioned over
When on the different coils of the same area, the only corresponding coil power supply of minimal difference be changed to for difference first it is small and second is small right
The coil answered carries out time sharing power supply.
9. the method according to the description of claim 7 is characterized in that region is divided to all coils, when different terminals are positioned over
When on the coil of different zones, power simultaneously for the corresponding coil of minimal difference in each region.
10. according to the method described in claim 7 or 8 or 9, which is characterized in that detected in real time when to coil power supply environment temperature,
Coil surface temperature；
When environment temperature is higher than highest threshold value, charge power is reduced to lowest power threshold value；
When environment temperature is less than lowest threshold, charge power is increased to peak power threshold value；
When coil surface temperature is higher than predetermined threshold value, stop the power supply to coil until heavy when coil temperature is less than predetermined threshold value
Newly coil is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810696563.7A CN108711945A (en) | 2018-06-28 | 2018-06-28 | A kind of multi-coil wireless charging device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810696563.7A CN108711945A (en) | 2018-06-28 | 2018-06-28 | A kind of multi-coil wireless charging device and method |
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| CN108711945A true CN108711945A (en) | 2018-10-26 |
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| CN201810696563.7A Pending CN108711945A (en) | 2018-06-28 | 2018-06-28 | A kind of multi-coil wireless charging device and method |
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Cited By (6)
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| CN109712789A (en) * | 2018-12-18 | 2019-05-03 | 成都市易冲半导体有限公司 | A kind of wireless charging transmitting terminal coil stacked structure |
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| WO2021046204A1 (en) * | 2019-09-04 | 2021-03-11 | Ge Hybrid Technologies, Llc | Wireless power transmission apparatus with multiple controllers and adjacent coil muting |
| CN114144958A (en) * | 2019-05-21 | 2022-03-04 | 通用电气公司 | Wireless Power Transmitter with Multiple Primary Coils and Adjacent Coil Silence |
| CN116613902A (en) * | 2023-07-20 | 2023-08-18 | 南京航空航天大学 | Wireless foreign matter detection device and wireless charging system that charges |
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| CN116613902A (en) * | 2023-07-20 | 2023-08-18 | 南京航空航天大学 | Wireless foreign matter detection device and wireless charging system that charges |
| CN116613902B (en) * | 2023-07-20 | 2023-09-26 | 南京航空航天大学 | A wireless charging foreign object detection device and wireless charging system |
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Effective date of registration: 20181112 Address after: 214400 Chengjiang Road 159, Jiangyin City, Wuxi City, Jiangsu Province Applicant after: JIANGSU ZIMI ELECTRONIC TECHNOLOGY CO., LTD. Applicant after: Suzhou blue Pei Wireless Communication Technology Co., Ltd. Address before: 214431 A913, 159 Chengjiang Middle Road, Jiangyin City, Wuxi City, Jiangsu Province Applicant before: JIANGSU ZIMI ELECTRONIC TECHNOLOGY CO., LTD. |