CN107947286A - A kind of wireless charging device of holding load identification and its recognition methods - Google Patents
A kind of wireless charging device of holding load identification and its recognition methods Download PDFInfo
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- CN107947286A CN107947286A CN201711348321.0A CN201711348321A CN107947286A CN 107947286 A CN107947286 A CN 107947286A CN 201711348321 A CN201711348321 A CN 201711348321A CN 107947286 A CN107947286 A CN 107947286A
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Classifications
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- H02J7/025—
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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
-
- 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
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
-
- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
Wireless charging device and its recognition methods the present invention relates to holding load identification, the wireless charging device includes microcontroller, power emission circuit group, coil array and multiplexer, the microcontroller connects power emission circuit group, the power emission circuit group connects coil array by multiplexer, and the coil array connects microcontroller.The power emission circuit group includes multiple power emitting units, and the coil array includes multiple coils, and the power emitting unit connects each coil by microcontroller.Power emitting unit includes the power emission circuit and match circuit being connected with each other, power emission circuit connection microcontroller, match circuit connection multiplexer and microcontroller.The present invention by it is quick, direct, without supplementary module in a manner of load is identified, positions, system resource can be saved, reduce cost, improve operational efficiency；Realization does not depend on communication in initial operating stage or power transmission can effectively exclude foreign matter.
Description
Technical field
Wireless charging device and its recognition methods the present invention relates to a kind of identification of holding load.
Background technology
With the popularization of smart mobile phone, wearable device, the mode to be charged using power cord, data cable can not
Meet the quantity of smart machine explosive growth.Wireless charging was obtaining development at full speed in recent years, and wireless charging system
The problem of presently most paying close attention to is become to the ability of multi-load equipment charge.Market demands wireless charging system can low cost,
Load equipment must quick and precisely be positioned, early, no power waste, without security risk foreign matter effectively be detected.
The scheme that existing identification is loaded and positioned is mainly as follows：
First, by detecting transmitting terminal resonant frequency deviation, judge that system band carries situation and load situation, detect resonant frequency
Transmitting terminal is needed to carry out frequency sweep, by detecting in the lower resonance circuit of different frequency driving the maximum value voltage of capacitance or inductance most
Big value electric current, determines the resonant frequency under current load conditions.Compare resonant frequency of the current resonant frequency with system when unloaded,
Identification is loaded and positioned.This method, which has the frequency range of frequency sweep, frequency accuracy, compares strict requirements, and than relatively time-consuming,
The scalability applied for multi-load and coil array is poor.
2nd, to Load transportation small-power, by being identified with payload communication with obtaining the signal strength values that load end detects
Load and position, do not receive signal strength information at the appointed time, then judge system for zero load.The implementation of this method mainly according to
By load with the communication of system, and load and power on, start communication module and need longer time, for multi-load and coil array
The scalability of application is poor.
3rd, gravity sensor or infrared sensor are integrated in systems, and sensor detects when being carried by system band, is unloaded
As a result load is identified and positioned.This method needs multiple sensors being homogeneously disposed in system surfaces, considerably increases into
The complexity of sheet and system.
4th, followed the trail of and loaded using movable coil, system is to Load transportation power, by calculating parasitic drain, charging frequency
Rate judges that system identification is loaded and positioned.This method carries out position judgment based on power emission and the deviation of load-receipt power,
Judge that content includes coil and needs mobile direction and distance, and need a single coil mobile device, considerably increase
The application direction extension of the complexity and cost of system, no normal direction multi-load and coil array.
The major programme of existing foreign bodies detection is as follows：
First, provided with load by Q values testing result in the case of system load and compared with reference to Q values, Q values deviation exceedes threshold
Value, judging system load, there are foreign matter.This method, which needs to load, enters stage of communication, refers to Q values to system transmission, judges every time
Consumption longer time is required for, and needs to be enough the power that makes it into stage of communication to Load transportation, if load exists
Foreign matter, deterministic process can also cause certain caloric value.
2nd, the reception power that system is provided in power transmission process by the monitoring to transmission power and load, is obtained
Difference, when difference exceedes threshold value, judging system load, there are foreign matter.The precision of this method is depended in different transmission power status
Under, to the precision of transmitting terminal and load inherent loss assessment, the complexity of system is added, and easily occur failing to report, report by mistake
Situation, causes system response not in time.Deterministic process is built upon system in the state of loading normal power transmission, if negative
Carry there are foreign matter, before system response, may will produce very big caloric value, and then there are security risk.
The major programme of existing enhancing power transmission is as follows：
It is being connected one by one in the system for forming power emission subelement by power emission circuit with unicoil, when single son
When unit transimission power is insufficient for load requirement, opens another subelement and strengthen magnetic field.This method material cost is higher,
The problem of very flexible.When transimission power is insufficient, although increase coil can increase magnetic field, transmitting terminal can be caused
Resonant frequency produces deviation, reduces system effectiveness.
To sum up existing technical solution generally existing system complex, of high cost and there are possible security risk etc.
Problem, and also there is the problem of time-consuming, power consumption and poor expandability to more equipment.
The content of the invention
The present invention is for multi-load while charging technique, there is provided a kind of wireless charging device of holding load identification and its knowledge
Other method, by it is quick, direct, without supplementary module in a manner of load is identified, positions, it can save system resource,
Cost is reduced, improves operational efficiency；Communication is not depended in initial operating stage or power transmission can effectively exclude foreign matter
And the security of safeguards system；On the premise of enhancing magnetic field ability is not lost, realize the correction to transmitting terminal resonant frequency, carry
High efficiency.
The present invention provides a kind of wireless charging device of holding load identification, including microcontroller, power emission circuit group,
Coil array and multiplexer, the microcontroller connect power emission circuit group, and the power emission circuit group passes through more
Path multiplexer connects coil array, and the coil array connects microcontroller.
The power emission circuit group includes multiple power emitting units, and the coil array includes multiple coils, described
Power emitting unit connects each coil by microcontroller.
The coil array includes multiple coils, between the coil area mutually overlapping between 30%~50%,
Coil inside radius overlapping ranges between 20%~35%, and each coil have with least two coils it is overlapping.
The number of the power emitting unit is N, and the number of the coil is M, wherein N≤M.
The power emitting unit includes power emission circuit and match circuit, the power emission circuit and match circuit
It is connected, the power emission circuit and match circuit are all connected with microcontroller, and the match circuit connects multiplexer.
The multiplexer is single pole multiple throw group.
The present invention also provides a kind of recognition methods of holding load identification, comprise the following steps：
Step 1：Microcontroller and power emitting unit are resetted and initialized after the power is turned on；
Step 2：Microcontroller enables the power emitting unit X of current idle, and by power emitting unit X and coil
Coil in array, which is sequentially connected, to be detected, and testing result is sent to microprocessor；
Step 3：Microcontroller handles testing result, judges whether that band carries and loads number, and to system load
Positioned；
Step 4：The judging result that microcontroller is obtained according to step 3 carries out performed below：
When A, judging system zero load, then timer built-in in microcontroller is timed, order is used for load detecting
Power emitting unit X enter holding state, the auto-returned step 2 at the end of timing；
B, judge in system load there are during foreign matter, then judge whether load is only foreign matter, if then in microcontroller
Built-in timer is timed, and order enters holding state for the power emitting unit X of load detecting, at the end of timing
Auto-returned step 2；If otherwise being removed to foreign matter, and performed according to the step of following estimate of situation C；
C, system load is judged for more than one load equipment during foreign, and power transmission is carried out to load equipment.
Preferably, microcontroller is closed according to current detection threshold, foreign bodies detection current threshold and coil in the step 3
Connection table judges that system judges whether that band carries and load number.
Preferably, D is specially in the step 4：
Built-in timer is timed in microcontroller, return to step two at the end of timing, microcontroller while timing
Device enables the power emitting unit of corresponding load number, load situation and load detecting current effective value is recorded, with load equipment
Communication obtains power transmission demand and load equipment information, microcontroller send information to corresponding power emission circuit, power
Radiating circuit carries out power transmission to load equipment, after the completion of power transmission, stops power transmission, and send to microcontroller
Interrupt signal, power emitting unit enter holding state.
Brief description of the drawings
Fig. 1 is the Organization Chart of the wireless charging device of support multi-load provided by the invention；
Fig. 2 is coil array structure schematic diagram of the present invention；
Fig. 3 is the flow chart of the wireless charging method of support multi-load provided by the invention；
Fig. 4 associates schematic diagram for coil of the present invention；
Fig. 5 is the structure diagram of match circuit in the present invention.
Fig. 6 is match circuit in the present invention and other module connection diagrams.
Embodiment
The present invention provides a kind of wireless charging device of holding load identification, as shown in Fig. 1 left-hand broken line frames, including micro-control
Device 1, power emission circuit group 2, coil array 3 and multiplexer 4 processed, load equipment 1 in Fig. 1 in the dotted line frame of right side is to negative
Equipment X (load equipment represents the normal load of system, is to receive the equipment that power charges) is carried, and metallic foreign body is for whole
It is load for a system (wireless charging device for supporting multi-load), being can not bringing onto load when whole system is run
, i.e. X can be zero.It is to represent correlation that system and its load that Fig. 1, which will be loaded and be made signal, and system load can
The appearance of the content that can be included, wherein metallic foreign body can bring security risk, be consequently belonging to need to be identified in operational process
And the load excluded.
The microcontroller 1 connects power emission circuit group 2, and the power emission circuit group 2 includes multiple power emissions
Unit, its number are N, and the microcontroller 1 connects each power emitting unit respectively, to realize control of which.The coil
Array 3 includes multiple coils, and number M, wherein N, M are not more than 1 natural number, and N≤M.Each power emitting unit
Coil in each coil array 3 is connected by multiplexer 4, the multiplexer 3 connects microcontroller 1, the micro-control
Device 1 processed is preferably based on 32- The MCU of-M0, the power of power emission circuit group 2 is controlled by microcontroller 1
The matching of transmitter unit and coil array coil, realizes mutual connection or disconnection.The multiplexer 4 is preferably hilted broadsword
Multithrow switch group, that is, contain multiple single pole multiple throws, its number depends on power emitting unit in power emission circuit group 2
Number.The detection that through the above structure, the invention realizes to load.
The structure diagram of coil array 3 in the present invention is as shown in Fig. 2, area mutually overlapping between each coil exists
In the range of 30%~50%, coil inside radius overlapping ranges are between 20%~35%, and each coil and at least two lines
Circle has overlapping.Using above-mentioned loop construction, under identical drive condition, loading coil is any in coil array coverage
Position coefficient of coup deviation is less than 15%, and wireless charging dynamics control devices form charging surface in the outside of coil array, no
Its concrete shape is limited, it is variously-shaped to be formed as rectangle, circle etc., but needs to be filled by coil array arrangement under its surface
It is full, so that power receiving device can be positioned over the optional position of system surfaces.
Single coil preferred embodiment is：48.5mm overall diameters are formed by 180 bursts of 0.06mm diameter enameled wire coilings,
25.3mm interior diameters, thickness 2.0mm, the single coil that individual layer 11 encloses.
Comprising power emission circuit 6, (power emission circuit is using current main-stream for each power emitting unit in the present invention
Power emission circuit, is preferably based on the scheme of IDT P9242 chips) with a match circuit 5, the power emission circuit 6 and
Microcontroller 1 is all connected with circuit 5.The structure of the match circuit 5 is as shown in figure 5, the match circuit 5 connects power emission
Between circuit 6 and multiplexer 4.The match circuit 5 can adjust transmitting by the configuration of capacitance and inductance forming array
The resonant frequency at end, its concrete structure are not limited, as long as the configurable resonant network that capacitance, inductance are formed should all invented
Within the scope of the match circuit.As shown in fig. 6, the output terminal of the input terminal connection power emission circuit 6 of match circuit 5, control
End processed connects microcontroller 1, its internal connection relation is adjusted by microcontroller 1, such as the closure of capacitance/disconnected is connected in Fig. 5
Open, the output terminal connection multiplexer 4 of match circuit 5.
The present invention provides a kind of recognition methods of holding load identification, its principle is as follows：
A, microcontroller enables a certain power emitting unit of current idle, makes itself and unappropriated in coil array
One coil is connected, and power emitting unit sends several short pulse signals to the coil, detects after short pulse signal in a period of time
The effective current value of coil is flowed through, if may determine that the coil band carries beyond certain threshold value when the value is more unloaded.
Since short pulse is continuous, with TDTo detect short pulse signal cycle, THFor high level lasting time, TLTo be low
When level continues, TD=TH+DL；
The number of short pulse signal is 6~18, and high level is the substantial scope selected at present in 5V~10V, cycle TDModel
Enclose for 2-10ms, THScope is 200ns-1.5us.
In mutually overlapping area 45% or so between the embodiment of above-mentioned single coil and each coil, most preferably
Select：8 continuous TsD=3.75ms, TH=375ns, the short pulse of high level 5V.
The effect for applying short pulse signal is that power emitting unit outwards launches minute amount of power by coil, if load
Equipment, this portion of energy can pass to the resonant network of load equipment.After short pulse, the resonant network of load equipment can radiate
The minute amount of power of storage, the power of radiation generate electric current in the coil of emitting side.Detection time is determined according to transmitting minute amount of power
It is fixed, it is generally less than 1ms, the threshold value for detecting electric current is equally to determine that threshold value is set in uA magnitudes according to the minute amount of power of transmitting,
Typically smaller than 200uA.In the preferred solution of short pulse, suitable threshold range is in 90uA ± 20uA.
B：Microcontroller makes the power emitting unit using the above method in coil array by controlling multiplexer
All idle coils traveled through using the methods of above-mentioned A processes, then can obtain the band of each coil in coil array
Load situation.
C：Microcontroller is according to the record of each coil current virtual value, the situation and coil sequence number that statistical coil band carries.
By the way that with the comparison for carrying coil sequence number, coil contingency table and current effective value, identification load number, judge load situation, with being somebody's turn to do
Load couples best coil and its association coil.
Microcontroller by the above method, periodically can carry out load detecting, you can realization pair with built-in timer to system
System load increase, the real-time monitoring removed.
The microcontroller possess processing interrupt, the function of timing wake-up (i.e. built-in timer), storage inside power
The number of the power emitting unit included in radiating circuit group, coil array coil sequence number, coil contingency table；Power emission list
Function of the member except carrying out power transmission to load, also needs possess transmission interruption and the ability with micro-controller communications；Power
For radiating circuit group by being connected by the multiplexer of microprocessor control with coil array, any power emitting unit can be with
Any unappropriated one or more coils are connected in array.
As shown in figure 4, the coil contingency table is as known parameter, after definite coil array, the association
Table is given value.Coil contingency table is used to understand when some loop A is being used, if neighbouring coil is opened
The equipment transimission power of loop A load can be significantly increased by opening, so microcontroller can need the work according to current loop A
Make situation and judge that the power of transmission can be increased by opening associated coil when transimission power is insufficient.Coil contingency table
It can also be used to judge when loop A is used, associated coil should be prohibited to carry out load detecting, also forbid
Other equipment outside the equipment loaded to loop A carries out power transmission, improves security.
Above method, can also be by the load foreign matter threshold value that stores in the microcontroller except that can be used for identifying load
Table, realizes the exclusion to foreign matter, and specific detection method is that D is also included after three above step：Microcontroller is by looking into
Table method, by the effective current value for flowing through coil with load foreign matter threshold value table be compared, judge system identification load whether be
The payload of power can be received.
For the wireless charging device single coil transimission power magnetic field deficiency is corresponded to using single power emitting unit
When, it is necessary to which single power emitting unit connects more than one coil carries out power transmission (single power emitting unit possesses
The function that more than one coil carries out power transmission is connected at the same time), this method will cause emitting side resonance frequency shift, need
Match circuit in power emitting unit is configured, as shown in figure 5, inductance of the Configuration Values according to known single coil
Value, parasitic resistance values, system increase number of coils, increase coil are calculated with the load coefficient of coup, pass through configurations match electricity
Road adjusts resonant frequency, improves transimission power.
Embodiment：
The present embodiment provides a kind of recognition methods of holding load identification, as shown in figure 3, specifically including below scheme：
Step 1：System emitting side (microcontroller and power emitting unit) is resetted and initialized after the power is turned on, initially
Change number of the content including microcontroller acquisition power emitting unit, coil contingency table, primary coils threshold detection value, foreign matter inspection
Survey current threshold, foreign bodies detection power attenuation table and foreign bodies detection alarm threshold value table；Power emitting unit obtains foreign bodies detection work(
Rate threshold value table, foreign bodies detection safe transmission power threshold table and the foreign bodies detection power threshold table under firm power threshold value.Just
After the completion of beginningization, all power emitting units of microcontroller order enter holding state, rupturing duty transmitter unit and coil battle array
The connection of row, it is ensured that the initial any power emitting unit of operation can use any one coil in coil.
Step 2：Microcontroller enables the power emitting unit X of current idle, and by power emitting unit X and coil
Coil in array is sequentially connected, and is detected successively, and testing result is sent to microprocessor.
Each detection method is that a coil period applies short pulse signal to power emitting unit X thereto, detects short arteries and veins
Rush in latter section of short time T and flow through the electric current I of coilcoil, calculate IcoilEffective current value, and record the value and coil
Sequence number, and it is transferred to microcontroller.
After power emitting unit X completes all coils detection to coil array, interrupt signal is sent to microcontroller.
Step 3: after microcontroller receives the interrupt signal of power emission subelement, at all testing results
Reason, i.e., judge whether band is carried and born system according to the current detection threshold of system, foreign bodies detection current threshold and coil contingency table
Number is carried, system load is positioned.
Step 4：Microcontroller carries out the execution under following three kinds of different situations according to judging result：
If A, microcontroller judges system zero load, timer built-in in microcontroller is timed, microcontroller
Order enters holding state for the power emitting unit X of load detecting, until periodically terminating, returns to step 2；
If B, microcontroller judges that record foreign matter position, drives buzzer warning there are foreign matter in system load at this time,
Then microcontroller judges whether load is only foreign matter, if judging, load is only foreign matter, and timer is timed, while micro-
The power emitting unit X that control order is used for load detecting enters holding state, return to step two at the end of timing；If sentence
It is disconnected to include foreign matter, but band carries at the same time, then foreign matter is carried out removing in the stipulated time, it is right if do not removed at the appointed time
Timer is timed, while microcontroller order enters holding state for the power emitting unit X of load detecting, when timing
At the end of return to step two, if removed at the appointed time, perform to the power transmission of load equipment, its idiographic flow with
Flow is identical in the case of judging C；
If C, microcontroller judges system load at this time as more than one load equipment, foreign, then microcontroller is to it
Middle timer is timed, and is detected immediately for periodically increasing load newly to system, while the work(of enabled corresponding load number
Rate transmitter unit, records load situation and load detecting current effective value, trial communicates acquisition power transmission with load equipment need to
Ask and facility information.If the stage does not receive the feedback of load equipment, it tries communicates again, if continuous attempt (three times) several times
Fail, record the positioning of the load and the virtual value of load detecting electric current, microcontroller has in the electric current for detecting the position
Before valid value changes, no longer communicate to the load.Microcontroller communicates the information obtained with load equipment including negative
Carry the minimal power values for needing system to transmit, manufacturer's coding and device coding.
After power emission circuit obtains the effective information of load equipment, the effective information is transmitted to microcontroller.Microcontroller
Device sends information to corresponding power emission circuit, and power emission circuit carries out power transmission to load equipment；
After the completion of power transmission, stop power transmission, and interrupt signal, microcontroller order work(are sent to microcontroller
Rate transmitter unit enters holding state, and the power transmission of the load equipment is completed.If occur in power transmission process abnormal
Situation, stops power transmission and sends to microcontroller to interrupt, buzzer warning is driven by microcontroller immediately.
Microcontroller can directly control coil array in the present invention, can to the record of use state and in real time more
Newly, and microcontroller can identify that power transmission is complete to loading the record and real-time update of current and history testing result
Into or due to abnormal conditions interrupt power transmission load equipment information and position.
Present invention has the advantage that：
Load detection method provided by the invention can be expanded for excluding foreign matter；
Each power emitting unit is provided with a match circuit in the present invention, it is possible to achieve power emitting unit is in power
Timely correction of the transmitting procedure to the deviation of resonant frequency；
Judge to load number using coil contingency table and current effective value in the present invention, select to couple most in relevant range
Good coil carries out power transmission, and when single coil transimission power is insufficient, coupling in relevant range is selected by coil contingency table
The most suitable coil enhancing magnetic field of conjunction relation.
Microcontroller is by directly controlling coil array in the present invention, to the record and real-time update of use state.
Microcontroller be able to can be identified to loading the record and real-time update of current and history testing result in the present invention
Power transmission is completed or the load equipment information due to the transmission of abnormal conditions interrupt power and position.
Time needed for present invention reduction system identification load, positioning load, and without supplementary module, low in energy consumption, reduction
Cost and complexity, suitable for the extension of multi-load application.
The present invention can effectively exclude most of foreign matter initial stage in system operation, improve running efficiency of system, increase
The strong security of system.
The present invention compensates the deviation of system emitting side resonant frequency by the application of match circuit in time, improves system
The efficiency for power transmission of uniting.
The present invention can quick and precisely interpretation load number and positioning, it is necessary to when strengthening magnetic field, quick selection is most closed
Suitable coil.
The present invention can prevent other power emission circuit misconnections and take the strongly connected coil of coil, effectively prevent
Because of the established security risk launched-received power transmission mutation and trigger.
The present invention can avoid power emission circuit from carrying out communication repeatedly or power biography to known device or warping apparatus
It is defeated, system power dissipation is reduced, system resource is saved, improves running efficiency of system.
Claims (9)
- A kind of 1. wireless charging device of holding load identification, it is characterised in that including microcontroller, power emission circuit group, Coil array and multiplexer, the microcontroller connect power emission circuit group, and the power emission circuit group passes through more Path multiplexer connects coil array, and the coil array connects microcontroller.
- 2. the wireless charging device of holding load identification according to claim 1, it is characterised in that the power emission electricity Road group includes multiple power emitting units, and the coil array includes multiple coils, and the power emitting unit passes through microcontroller Device connects each coil.
- 3. the wireless charging device of holding load identification according to claim 2, it is characterised in that the coil array bag Multiple coils are included, between 30%~50%, coil inside radius overlapping ranges exist the area mutually overlapped between the coil Between 20%~35%, and each coil have with least two coils it is overlapping.
- 4. the wireless charging device of holding load identification according to claim 2, it is characterised in that the power emission list The number of member is N, and the number of the coil is M, wherein N≤M.
- 5. the wireless charging device of holding load identification according to claim 2, it is characterised in that the power emission list Member includes power emission circuit and match circuit, and the power emission circuit is connected with match circuit, the power emission circuit Microcontroller is all connected with match circuit, the match circuit connects multiplexer.
- 6. the wireless charging device of holding load identification according to claim 1, it is characterised in that the multiplexer For single pole multiple throw group.
- 7. a kind of recognition methods of holding load identification, it is characterised in that comprise the following steps：Step 1：Microcontroller and power emitting unit are resetted and initialized after the power is turned on；Step 2：Microcontroller enables the power emitting unit X of current idle, and by power emitting unit X and coil array In coil be sequentially connected and be detected, and testing result is sent to microprocessor；Step 3：Microcontroller handles testing result, judges whether that band carries and load number, and system load is carried out Positioning；Step 4：The judging result that microcontroller is obtained according to step 3 carries out performed below：When A, judging system zero load, then timer built-in in microcontroller is timed, work(of the order for load detecting Rate transmitter unit X enters holding state, the auto-returned step 2 at the end of timing；B, judge in system load there are during foreign matter, then judge whether load is only foreign matter, if then to built-in in microcontroller Timer be timed, order enters holding state for the power emitting unit X of load detecting, at the end of timing automatically Return to step two；If otherwise being removed to foreign matter, and performed according to the step of following estimate of situation C；C, system load is judged for one or more load equipments during foreign, and power transmission is carried out to load equipment.
- 8. the recognition methods identified according to the holding load described in claim 7, it is characterised in that micro-control in the step 3 Device processed judges that system judges whether that band carries and load is a according to current detection threshold, foreign bodies detection current threshold and coil contingency table Number.
- 9. the recognition methods identified according to the holding load described in claim 7, it is characterised in that D has in the step 4 Body is：Built-in timer is timed in microcontroller, return to step two at the end of timing, and microcontroller makes while timing The power emitting unit of load number can be corresponded to, load situation and load detecting current effective value is recorded, communicates with load equipment Obtain power transmission demand and load equipment information, microcontroller send information to corresponding power emission circuit, power emission Circuit carries out power transmission to load equipment, after the completion of power transmission, stops power transmission, and send and interrupt to microcontroller Signal, power emitting unit enter holding state.
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| CN114946129A (en) * | 2019-11-21 | 2022-08-26 | 通用电气混合动力技术有限责任公司 | Aggregated wireless power transfer with multiple coils and communication channels |
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