CN106374579A - Wireless charging system and power transmission control method thereof - Google Patents
Wireless charging system and power transmission control method thereof Download PDFInfo
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- CN106374579A CN106374579A CN201610922868.6A CN201610922868A CN106374579A CN 106374579 A CN106374579 A CN 106374579A CN 201610922868 A CN201610922868 A CN 201610922868A CN 106374579 A CN106374579 A CN 106374579A
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- 238000007600 charging Methods 0.000 title claims abstract description 182
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 title claims abstract description 23
- 238000010280 constant potential charging Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 18
- 230000002146 bilateral effect Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010277 constant-current charging Methods 0.000 abstract 3
- 230000008859 change Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- H02J7/025—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The embodiment of the invention provides a wireless charging system and a method for controlling power transmission of the wireless charging system. The wireless charging system comprises a wireless charging emission end and a wireless charging receiving end. The method comprises the steps of controlling the wireless charging system to transmit power in a constant-current charging mode; detecting whether a battery voltage is smaller than a preset voltage value or not; and controlling the wireless charging system to transmit power in a constant-voltage charging mode on the condition that the battery voltage is larger or equal to the preset voltage value. The embodiment of the invention provides the wireless charging system and the method for controlling power transmission of the wireless charging system. Charging is performed in the constant-current charging mode and then is performed in the constant-voltage charging mode, the advantages of the single constant-voltage charging mode and the single constant-current charging mode can be fully utilized, and the respective defect is avoided.
Description
Technical field
The present invention relates to wireless charging technical field, in particular it relates to a kind of wireless charging system and be used for this wireless charging
The method that the power transmission of electric system controls.
Background technology
Electric automobile (ev) has the advantages that environmental protection, zero-emission, is therefore developed rapidly.At present, electronic vapour
Based on wired charging, there is plug-in and easily produce spark, abrasion in this charging modes to car, not safe, and easy care etc. does not lack
Point.Wireless power transmission technology has broken away from the dependence to wire, effectively can overcome disadvantages mentioned above so that the power supply of electric automobile
There is new selection.
As shown in figure 1, first, single-phase or three phase mains 11 is through ac/dc 12 rectification for a kind of typical wireless charging system
It is changed into unidirectional current after filtering, is changed into high-frequency alternating current through dc/ac inverter 13, compensate after network 14 compensation through former limit afterwards
Convert electrical energy into the high-frequency alternating magnetic field in space by energy transmitter structure 15, energy mechanism for picking 21 catches magnetic field, will
It is converted into electric energy, compensates network 22 through secondary and compensates, can fill for vehicle mounted dynamic battery 24 after ac/dc 23 rectifying and wave-filtering
Electricity.Due to by restrictions such as rechargeable battery working condition and charging intervals it is desirable to through-put power change keep within the specific limits,
Keep through-put power stable.But present inventor finds during realizing the present invention, due to different electric automobiles
Chassis height is different, and when automobile charges, to align degree different for energy transmitting and mechanism for picking, lead to the coefficient of coup to change, enter
And have influence on through-put power.
In addition, for electric automobile power battery, typical charging method has: constant-current charge method and constant-voltage charge method.Its
Middle constant-current charge is relatively small in incipient stage charging current, and later stage charging current is again relatively excessive, the whole charging interval is long,
Energy consumption is big., in the incipient stage, cell emf is little for constant-voltage charge, so charging current is very big, affects battery life, in charging
Phase and later stage, cell emf raises, and charging current is too small, long-term undercharge, the service life of impact battery.
In the research of electric automobile wireless charging, a kind of typical network that compensates is that bilateral lcc compensates network, such as Fig. 2
Shown, the characteristic of this compensation network is that charging current is unrelated with load, you can realize constant-current charge, but this charging modes are being opened
Stage beginning charging current is relatively small, and later stage charging current is again relatively excessive, and the whole charging interval is long, energy consumption is big, is charging
Later stage easily causes to battery to damage.Another kind of typical network that compensates compensates network for lcc-c, and this secondary induced voltage has
Constant pressure source characteristic, but its secondary induced voltage is affected by multiple parameters such as the coefficient of coup, compensation network, supply voltages, voltage
Value is unstable, if its magnitude of voltage exceedes cell voltage excessively, easily battery is caused to damage.
Content of the invention
For the problems of single constant voltage charging method and constant-current charge mode, the embodiment of the present invention provides a kind of
Wireless charging system and the method for the power transmission control for this wireless charging system, it enters first by constant-current charge mode
Charge, be charged using constant voltage charging method afterwards, characteristic under the different quantities of electric charge for the battery and single can be taken full advantage of
Constant voltage charging method and constant-current charge mode existing for advantage, and avoid its respective defect.
To achieve these goals, the embodiment of the present invention provides a kind of power transmission controlling party for wireless charging system
Method, this wireless charging system comprises wireless charging transmitting terminal and wireless charging receiving terminal, and the method includes: controls described wireless charging
Electric system carries out power transmission in the way of constant-current charge；Whether detection cell voltage is less than preset voltage value；In described battery
In the case that voltage is more than or equal to described preset voltage value, described wireless charging system is controlled to carry out in the way of constant-voltage charge
Power transmission.
Optionally, the charging voltage that the mode of described constant-voltage charge is adopted is wireless charging system in constant-current charge mode
1.2 times of the cell voltage of the moment of the switching and constant voltage charging method between.
Optionally, the method also includes: whether detection charging current is less than pre-set current value；And in described charging current
In the case of described pre-set current value, described wireless charging system is controlled to stop carrying out power biography in the way of constant-voltage charge
Defeated.
Optionally, mended with lccc-c by controlling the compensation network of described wireless charging system to compensate network in bilateral lccc
Repay switching between network, to realize switching between constant-current charge mode and constant voltage charging method for the described wireless charging system.
Optionally, controlling described wireless charging system in the way of constant-current charge or the mode of constant-voltage charge carries out power
Before transmission, the method also includes: the coefficient of coup between detection wireless charging transmitting terminal and wireless charging receiving terminal；According to institute
State the coefficient of coup between wireless charging transmitting terminal and wireless charging receiving terminal, calculate the wireless charging of described wireless charging system
Power；And in the case that this wireless charging power is less than predetermined power, adjust described wireless charging transmitting terminal and/or described
The compensating parameter of the compensation network of wireless charging receiving terminal, so that described wireless charging power is more than or equal to described default work(
Rate.
Optionally, the described compensation network adjusting described wireless charging transmitting terminal and/or described wireless charging receiving terminal
Compensating parameter comprises to adjust the compensation electricity of the compensation network of described wireless charging transmitting terminal and/or described wireless charging receiving terminal
Sense.
Optionally, described compensation inductance is adjusted by series capacitance at described compensation inductance.
Optionally, in the case that this coefficient of coup is less than the default coefficient of coup, the method also includes: prompting adjustment is described
The position of wireless charging receiving terminal, until the described coefficient of coup is more than or equal to the described default coefficient of coup.
Correspondingly, the embodiment of the present invention also provides a kind of wireless charging system, and this wireless charging system comprises wireless charging
Transmitting terminal and wireless charging receiving terminal, this wireless charging system also includes: battery voltage detector, for detecting battery electricity
Pressure；And control device, for executing following operation: control described wireless charging system to carry out power in the way of constant-current charge
Transmission；Whether detection cell voltage is less than preset voltage value；It is more than or equal to described preset voltage value in described cell voltage
In the case of, control described wireless charging system to carry out power transmission in the way of constant-voltage charge.
Optionally, the charging voltage that the mode of described constant-voltage charge is adopted is wireless charging system in constant-current charge mode
1.2 times of the cell voltage of the moment of the switching and constant voltage charging method between.
Optionally, this wireless charging system also includes: charging current detection means, for detecting charging current；And institute
State control device to be additionally operable to: whether detection charging current is less than pre-set current value；And it is less than described pre- in described charging current
If in the case of current value, described wireless charging system is controlled to stop carrying out power transmission in the way of constant-voltage charge.
Optionally, described compensation network comprises bilateral lccc compensation network and lccc-c compensation network, described control device
By controlling, the compensation network of described wireless charging system compensates network in bilateral lccc and lccc-c compensates and switches between network,
To realize switching between constant-current charge mode and constant voltage charging method for the described wireless charging system.
Optionally, this wireless charging system also includes: coefficient of coup detection means, for detect wireless charging transmitting terminal with
The coefficient of coup between wireless charging receiving terminal；Carry out power biography controlling described wireless charging system in the way of constant-current charge
Before defeated, described control device is additionally operable to execute following operation: according to described wireless charging transmitting terminal and wireless charging receiving terminal
Between the coefficient of coup, calculate described wireless charging system wireless charging power；And it is less than pre- in this wireless charging power
If in the case of power, adjust the compensation of the compensation network of described wireless charging transmitting terminal and/or described wireless charging receiving terminal
Parameter, so that described wireless charging power is more than or equal to described predetermined power.
Optionally, the described compensation network adjusting described wireless charging transmitting terminal and/or described wireless charging receiving terminal
Compensating parameter comprises to adjust the compensation electricity of the compensation network of described wireless charging transmitting terminal and/or described wireless charging receiving terminal
Sense.
Optionally, described compensation inductance is adjusted by series capacitance at described compensation inductance.
Optionally, this system also comprises suggestion device, and described control device is additionally operable to be less than in the described coefficient of coup and presets
In the case of the coefficient of coup, described suggestion device prompting is controlled to adjust the position of described wireless charging receiving terminal, until described coupling
Syzygy number is more than or equal to the described default coefficient of coup.By technique scheme, can be by detecting energy transmitter structure and energy
The coefficient of coup between amount mechanism for picking, and compensation network parameter is adjusted according to this coefficient of coup, to reach the mesh of power stability
's.
Because the characteristic of battery be accept when deficient electricity electric current ability strong, the fast energy accepting electric current when be full of
Power is weak.Wanting overall process constant-current charge, then charging current cannot be excessive, in order to avoid damaging battery, therefore, starting in charging
This charging current of stage accepts relatively small for electric current, and this charging current connecing relative to battery of later stage relative to battery
Again relatively large by electric current.The method that the present invention is combined using constant-current charge mode and constant voltage charging method, in the incipient stage,
Due to battery, to accept current capacity strong, can carry out constant-current charge with larger electric current (that is the constant current in " stage charging "
Charging current is greater than the charging current using " constant-current charge " for the overall process), after (this constant voltage can be for example battery using constant voltage
1.2 times of voltage, this 1.2 times can refer in be converted into this cell voltage in a flash of constant-voltage charge by constant current 1.2 times, because after
Face cell voltage may proceed to increase, and charging voltage keeps constant, so charging voltage is not just 1.2 times of cell voltage),
With the carrying out of charging process, cell voltage is gradually increasing, and charging voltage is constant, and therefore charging current can be gradually reduced, this
Just with battery after charging the phase accept the weak characteristic of current capacity be adapted.
The further feature of the embodiment of the present invention and advantage will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide and the embodiment of the present invention is further understood, and constitutes a part for description, with
The specific embodiment in face is used for explaining the embodiment of the present invention together, but does not constitute the restriction to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the structural representation of existing wireless charging system；
Fig. 2 is a typical coupler structure schematic diagram；
Fig. 3 is the structural representation that existing bilateral lcc compensates network；
Fig. 4 compensates the structural representation of network for the bilateral lccc that the present invention provides；
Fig. 5 compensates the structural representation of network for the lccc-c that the present invention provides；
The structural representation of the compensation network that Fig. 6 charges for the sectional that the present invention provides；
The structural representation of the wireless charging system that Fig. 7 provides for the present invention；
Fig. 8 is the method flow diagram of the firm power transmission provided by the present invention for wireless charging system；And
Fig. 9 is the step charge method flow diagram provided by the present invention for wireless charging system.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the embodiment of the present invention is described in detail.It should be appreciated that this
The described specific embodiment in place is merely to illustrate and explains the embodiment of the present invention, is not limited to the embodiment of the present invention.
The coefficient of coup detects
Fig. 2 is a typical coupler structure schematic diagram.It is respectively the voltage on primary and secondary side coil,For the electric current on former secondary coil, ω is voltage angular frequency, and m is the mutual inductance between two coils, then the voltage of former secondary
Electric current meets:
Secondary is made to open a way, thenTwo coil mutual inductances can be calculated is:
The coefficient of coup can be obtained is:
" coefficient of coup detection means " mentioned by the present invention based on measure voltage ＆ current and can be based on the above-mentioned coefficient of coup
Calculating process come to realize the coefficient of coup detection.
Bilateral lccc and lccc-c compensates network
It is that bilateral lcc compensates network, wherein s as shown in Figure 31～s4It is four switching tubes, d1～d4It is four rectifications of secondary
Diode, l1And l2It is transmitting and the self-induction of receiving coil respectively, lf1、ct1And c1It is that former limit compensates inductance and electric capacity, l respectivelyf2、
ct2And c2It is compensation inductance and the electric capacity of secondary respectively.M is the mutual inductance of two coils.uabCompensate the input of network for putting on former limit
Voltage, uabIt is the input voltage of rectification circuit.i1, i2, ilf1, ilf2It is l respectively1、l2、lf1、lf2On electric current. Represent the phasor form of relevant variable respectively.
When compensating network and meeting following constraint, wireless charging system is in resonant condition:
During resonance, the output current that secondary compensates network is:
It can be seen that it is not affected by load parameter, there is the characteristic of constant-current source, approximate constant-current charge can be carried out to battery.
The through-put power of wireless charging system is:
It can be seen that charge power is relevant with coefficient of coup k, when the automobile to differing heights chassis is charged or automobile does not have
To timing, its charge power all can be affected.
The present invention from compensate network angle, by change lf1、lf2Isoparametric value adjustment through-put power is to properly
Scope.In actual wireless charging system, capacitance can use capacitance matrix, is controlled by the break-make of control relay
System, but compensate inductance lf1、lf2Change be but not easy to.Present invention series capacitance at compensation inductance forms bilateral lccc and mends
Repay network, as shown in figure 4, inductance capacitance series connection forms equivalent inductance, meet:
Equivalent inductance can be adjusted by the value adjusting series capacitance, thus adjusting the transmission of wireless charging system
Power.
It is illustrated in figure 5 lccc-c and compensates network, during resonance, the induced voltage of its secondary is
Through the compensation of secondary series capacitance, induced voltage can be added in completely on rectifier bridge it is seen that its with load parameter no
Close, there is the characteristic of constant pressure source.The size of induced voltage can be at suitable model by adjusting the parameter compensating network
Enclose.
For compensating network using this lccc-c and carrying out in the case of wireless charging, generally select cell voltage ub's
1.1～1.2 times as charging voltage it is contemplated that rectification circuit to the transformation relation of voltage it is desirable to secondary induced voltage meets:
From formula (8), induced voltageRelevant with mutual inductance m, when the automobile to differing heights chassis is charged or vapour
Car, not to timing, can compensate the parameter of network to induced voltage by adjusting former limitIt is controlled, thus meeting charging
The requirement of voltage.Therefore, compensate for network for this lccc-c, the present invention also can pass through from the angle compensating network
Change lf1Isoparametric value adjustment charging voltage is to suitable scope.
Power stability control flow
Power stability control flow is as shown in Figure 8.Carry out the detection of the coefficient of coup first, wireless charging shown in Figure 7
The structure of electric system, disconnects switch s1, s3, closes s2, accessory power supply directly adds a voltage to transmitting coil, and receiving coil is opened
Road.Detection transmitting coil electric current i1With receiving coil voltage u2, it is calculated the coefficient of coup k of two coils by formula (3).If coupling
Close coefficient k and be less than default coefficient of coup kmin, then mean that automobile skew is excessive, now can point out to readjust automobile position
(for example, it is possible to being reminded in the various suitable mode such as voice, light), until the coefficient of coup meets charging requirement, that is, is more than
The default coefficient of coup.Calculate the power requirement meeting wireless charging system then according to the coefficient of coup recording by formula (4) (6)
Compensate network parameter, the compensation network of former secondary is adjusted (for example, can adjust as mentioned above by controlling executor 1,2
Compensation network parameter lf1、lf2).Afterwards, power-on is charged.Read battery management system (bms) charging voltage and
Battery current (this charging voltage and battery current also can be obtained by single measure voltage ＆ current equipment detection), is calculated
Charge power, if meeting power requirement, can continuing to charge, if being unsatisfactory for, meaning to break down, should stop charging.This work(
Rate stability contorting flow process can make the through-put power of wireless charging system keep in the range of a power grade, it is to avoid because of the coefficient of coup
Difference and lead to through-put power grade to change.
Step charge control flow
In order to preferably adapt to battery behavior, step charge can be adopted for electric automobile power battery.Wireless charging
Compensate in network, bilateral lccc compensates the characteristic that battery is shown with constant-current source, and lccc-c compensates the spy then with constant pressure source
Property.Therefore two kinds of compensation network integrations are got up by the present invention, form the wireless charging system that sectional charges, as shown in Figure 7.?
Charging initial period, two switches are pushed 1 end, and its equivalent circuit is that bilateral lccc compensates, as shown in figure 4, can be now electricity
Pond constant-current charge, reaches after certain amplitude after cell voltage, switch is pushed 2 ends, and now equivalent circuit compensates for lccc-c, such as
Shown in Fig. 5., can be now battery constant-voltage charge.
The control flow of specific step charge is as shown in Figure 9.Identical with power stability control flow, coupled first
The detection of coefficient.Referring to Fig. 7, secondary compensation network is adjusted to bilateral lccc and compensates by secondary controller 2, according to the coupling recording
Coefficient is calculated the compensation network parameter meeting power requirement by formula (4) (6), and adjustment compensates network parameter makes through-put power satisfaction want
Ask.Power-on, now compensating network is that bilateral lccc compensates, and can carry out constant-current charge to battery, read battery management system
System (bms) data, whether detection cell voltage is less than setting value, if less than, continuation constant-current charge, treat that cell voltage is more than and set
After definite value, it is series compensation that secondary is compensated network switching, that is, adopt lccc-c to compensate network.Select suitable charging voltage
(for example, this charging voltage can be 1.2 times of cell voltage, and this 1.2 times can refer to be converted into this flash of constant-voltage charge by constant current
Between 1.2 times of cell voltage), suitable former limit is calculated by formula (8) and compensates network parameter, adjustment former limit compensates network, carries out perseverance
Pressure charges.Read the charging current of battery management system (bms), if charging current is more than setting value, continue constant-voltage charge, directly
It is less than setting value to charging current, charging terminates.
It should be noted that it should be appreciated by those skilled in the art that the present application content part refer to " control dress
Put " performed by operation can " controller 1 ", " controller 2 ", " executor 1 " as shown in Figure 7, " executor 2 " etc. come real
Existing, but the enforcement of the present invention is not limited to the structure shown in Fig. 7, and the structure of other achievable same or like functions is also
Feasible.In addition, the present invention is applicable not only to automobile wireless charging, (for example, the occasion carrying out wireless charging is needed for other
Mobile phone wireless charges), also it is applicable.
Describe the optional embodiment of example of the present invention above in association with accompanying drawing in detail, but, the embodiment of the present invention does not limit
Detail in above-mentioned embodiment, in the range of the technology design of the embodiment of the present invention, can be to the embodiment of the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to the protection domain of the embodiment of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various possible compound modes no longer separately illustrate.
It will be appreciated by those skilled in the art that all or part of step realized in above-described embodiment method can be by
Program to complete come the hardware to instruct correlation, and this program storage, in a storage medium, includes some instructions use so that one
Individual (can be single-chip microcomputer, chip etc.) or processor (processor) execute the whole of each embodiment methods described of the application
Or part steps.And aforesaid storage medium includes: u disk, portable hard drive, read only memory (rom, read-only
Memory), random access memory (ram, random access memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
Additionally, combination in any can also be carried out between the various different embodiment of the embodiment of the present invention, as long as it is not
Run counter to the thought of the embodiment of the present invention, it equally should be considered as embodiment of the present invention disclosure of that.
Claims (10)
1. a kind of power transmission control method for wireless charging system, this wireless charging system comprises wireless charging transmitting terminal
And wireless charging receiving terminal is it is characterised in that the method includes:
Described wireless charging system is controlled to carry out power transmission in the way of constant-current charge；
Whether detection cell voltage is less than preset voltage value；
In the case that described cell voltage is more than or equal to described preset voltage value, control described wireless charging system with constant voltage
The mode charging carries out power transmission.
2. method according to claim 1 is it is characterised in that the charging voltage that the mode of described constant-voltage charge is adopted is
1.2 times of the cell voltage of moment of switching between constant-current charge mode and constant voltage charging method for the wireless charging system.
3. method according to claim 1 is it is characterised in that the method also includes:
Whether detection charging current is less than pre-set current value；And
In the case that described charging current is less than described pre-set current value, described wireless charging system is controlled to stop filling with constant voltage
The mode of electricity carries out power transmission.
4. method according to claim 1 is it is characterised in that existed by controlling the compensation network of described wireless charging system
Bilateral lccc compensates network and lccc-c compensates and switches between network, to realize described wireless charging system in constant-current charge mode
Switching and constant voltage charging method between.
5. the method according to any one of claim 1-4 is it is characterised in that controlling described wireless charging system with perseverance
Before the mode of the mode of current charge or constant-voltage charge carries out power transmission, the method also includes:
The coefficient of coup between detection wireless charging transmitting terminal and wireless charging receiving terminal；
According to the coefficient of coup between described wireless charging transmitting terminal and wireless charging receiving terminal, calculate described wireless charging system
Wireless charging power；And
In the case that this wireless charging power is less than predetermined power, adjust described wireless charging transmitting terminal and/or described wireless
The compensating parameter of the compensation network of charging receiving terminal, so that described wireless charging power is more than or equal to described predetermined power.
6. method according to claim 5 is it is characterised in that the described wireless charging transmitting terminal of described adjustment and/or described
The compensating parameter of the compensation network of wireless charging receiving terminal comprises to adjust described wireless charging transmitting terminal and/or described wireless charging
The compensation inductance of the compensation network of receiving terminal.
7. method according to claim 6 it is characterised in that by described compensation inductance at series capacitance to adjust
State compensation inductance.
8. method according to claim 5 it is characterised in that be less than the situation of the default coefficient of coup in this coefficient of coup
Under, the method also includes: prompting adjusts the position of described wireless charging receiving terminal, until the described coefficient of coup is more than or equal to institute
State the default coefficient of coup.
9. a kind of wireless charging system, this wireless charging system comprises wireless charging transmitting terminal and wireless charging receiving terminal, and it is special
Levy and be, this wireless charging system also includes:
Battery voltage detector, for detecting cell voltage；And
Control device, for executing following operation:
Described wireless charging system is controlled to carry out power transmission in the way of constant-current charge；
Whether detection cell voltage is less than preset voltage value；
In the case that described cell voltage is more than or equal to described preset voltage value, control described wireless charging system with constant voltage
The mode charging carries out power transmission.
10. wireless charging system according to claim 9 is it is characterised in that what the mode of described constant-voltage charge was adopted
Charging voltage is the cell voltage of the moment of switching between constant-current charge mode and constant voltage charging method for the wireless charging system
1.2 times.
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