CN108206569B - Wireless power transmitting and receiving device and system and electric automobile - Google Patents
Wireless power transmitting and receiving device and system and electric automobile Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 87
- 229910052744 lithium Inorganic materials 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 238000013528 artificial neural network Methods 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims 4
- 230000001105 regulatory effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 1
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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Abstract
The invention discloses a wireless power transmitting and receiving device, a system and an electric automobile, comprising: the wireless power transmission device comprises a wireless power transmission coil, a first alignment adjusting device, a first charging time control module and a first power controller, wherein the first alignment adjusting device comprises a control module, a transverse axis adjusting module, a longitudinal axis adjusting module and a receiving coil detecting module, the receiving coil detecting module comprises a pulse transmitting unit, a feedback unit and an output unit, the pulse transmitting unit transmits at least one pulse signal, the feedback unit judges the position information of the receiving coil according to the feedback signal of the pulse signal responded by the receiving coil, the first charging time control module controls the charging completion time, and the first power controller controls the wireless power transmission coil to transmit wireless power according to the charging completion time. This application can respond to battery power in wireless charging, carries out the real-time adjustment of power, extension electric automobile battery life.
Description
Technical Field
The invention relates to the field of wireless charging, in particular to a wireless power transmitting and receiving device, a wireless power transmitting and receiving system and an electric automobile, and particularly relates to a method for prolonging the service life of a lithium battery in the electric automobile by automatically realizing intelligent charging adjustment according to the characteristics of the lithium battery.
Background
Electric vehicles are being purchased and used in large quantities by people due to government subsidies, and the cruising ability of these electric vehicles is a matter of great concern. And the strength of endurance is related to the properties of the battery. However, with the use of the battery, that is, the repeated charging and discharging processes of the battery, the properties of the battery themselves change, so that the cruising ability becomes worse and worse, which is also the main reason why most people do not select electric vehicles.
Lithium batteries are widely used in mobile terminals due to their inherent characteristics. However, the existing charging method is not reset for the lithium battery itself, and the past charging method is still adopted, for example, the charging is carried out until the battery is charged to 100% and the battery is kept to 100% until the battery is disconnected from the power supply, when the battery is charged to a low charge, usually less than 20%. This way of charging causes the lifetime of the lithium battery to be drastically reduced.
Disclosure of Invention
Therefore, in view of the above problems, the present invention provides an electric vehicle wireless power transmission device, including: the wireless power transmission device comprises a wireless power transmission coil, a first alignment adjusting device, a first charging time control module and a first power controller, wherein the first alignment adjusting device comprises a control module, a transverse axis adjusting module, a longitudinal axis adjusting module and a receiving coil detecting module, the receiving coil detecting module comprises a pulse transmitting unit, a feedback unit and an output unit, the pulse transmitting unit transmits at least one pulse signal, the feedback unit judges the position information of the receiving coil according to the feedback signal of the pulse signal responded by the receiving coil, the first charging time control module controls the charging completion time, and the first power controller controls the wireless power transmission coil to transmit wireless power according to the charging completion time.
The wireless power transmitting device of the electric automobile, wherein the first charging time control module comprises an electric quantity detection unit and a prediction unit; the electric quantity detection unit detects the residual electric quantity of the battery of the electric automobile after receiving the output unit alignment confirmation information of the receiving coil detection module, and the prediction unit predicts the charging completion time T according to the residual electric quantity detection resultset(ii) a The prediction unit carries out charging completion time T according to the neural networksetAnd (6) predicting.
The wireless power transmitting device of the electric vehicle, wherein the first power controller controls the wireless power transmitting coil to transmit the wireless power according to the charging completion time, and the first power controller specifically comprises:
when the electric quantity of a lithium battery in the electric automobile is less than 30%, the quick charging mode is started to charge the electric automobile in a wireless mode, the electric quantity of the battery is measured in real time in the charging process, when the electric quantity of the lithium battery is detected to be increased to 30%, the quick charging mode is closed, and the wireless power transmitting device is timed to obtain the electric quantity recovery time T in the charging processrestore；
When the battery capacity reaches 30%, the wireless power transmitting apparatus calculates the remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreObtaining the quick charging characteristic of the battery, and predicting the time T required by the battery to quickly charge from 30% of electric quantity to 100% of electric quantity according to the quick charging characteristicfullAnd predicting that the lithium battery is rapidly charged from 50% of the electric quantityTime T required for electricity to reach 100% of electricity quantityh-full；
Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullAnd controlling the charging mode according to the judgment result.
The wireless power transmitting device of the electric automobile, wherein the wireless power transmitting device judges TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullWhen the battery is in the full-charge state, the wireless power transmitting device starts a quick-charge mode to charge the lithium battery in the electric automobile;
when T isresiGreater than TfullThe wireless power transmitting device calculates the trickle charge time T when the expected charge completion time is sufficient for the battery to be fully charged and there is a remainderslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
The utility model provides an electric automobile wireless power receiving arrangement, includes wireless power receiving coil, second alignment adjusting device, battery management unit BMS, second alignment adjusting device includes control module, cross axle adjusting module, axis of ordinates adjusting module, sending coil detection module includes pulse sending unit, feedback unit, output unit, pulse sending unit sends at least a pulse signal, feedback unit basis receiving coil response the feedback signal of pulse signal judges sending coil's position information, battery management unit BMS carries out the time control of accomplishing of charging, sends wireless power according to the wireless power sending coil of the time control of accomplishing of charging.
The wireless power receiving device of the electric vehicle, wherein the battery management unit BMS controls a charging completion time, and the controlling of the wireless power transmitting coil to transmit the wireless power according to the charging completion time specifically includes:
(1) the battery management system BMS among the electric automobile detects the electric quantity of lithium cell among the electric automobile, when lithium cell electric quantity is less than 30% among the electric automobile, BMS passes through communication device and sends lithium cell electric quantity and charge request at once to wireless power transmitting device, wireless power transmitting device detects the information received, when information for charge request at once and lithium cell electric quantity is less than 30% open the quick charge mode immediately and charge to the lithium cell through wireless mode, BMS real-time measurement lithium cell electric quantity in the charging process and transmit real-time measurement's lithium cell electric quantity numerical value to wireless power transmitting device through communication device, when wireless power transmitting device detects that lithium cell electric quantity promotes to 30%, close the quick charge mode, stop charging, wireless power transmitting device in the charging process counts time simultaneously and obtains electric quantity recovery time Trestore；
(2) When the electric quantity of the lithium battery reaches 30%, the expected charging completion time T is obtained through the communication devicesetTransmitting to a wireless power transmitting apparatus, the wireless power transmitting apparatus calculating a remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreObtaining the quick charging characteristic of the lithium battery, and predicting the time T required by the lithium battery to quickly charge from 30% of electric quantity to 100% of electric quantity according to the quick charging characteristicfullAnd predicting the time T required by the lithium battery to rapidly charge from 50% of the electric quantity to 100% of the electric quantityh-full；
(3) Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullAnd according to the relation betweenAnd (5) controlling the charging mode according to the result of the interruption.
The wireless power receiving device of the electric automobile, wherein the wireless power transmitting device judges TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullWhen the charging is finished, the wireless power transmitting device starts a quick charging mode to charge the lithium battery in the electric automobile, namely, even if a quick charging mode is always adopted, the lithium battery can only just reach a full-charge state or even can not reach the full-charge state when the expected charging completion time arrives;
when T isresiGreater than TfullThe wireless power transmitting apparatus calculates the trickle charge time T when the charging completion time is expected to be sufficient for the lithium battery to be fully charged and there is a remainderslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
The feedback unit sets a standard pulse number, the pulse signal transmitting unit transmits a series of pulse signals in a predetermined period, the feedback unit detects the number of the received pulse signals fed back by the receiving coil, when the difference between the standard pulse number and the fed-back pulse signals is smaller than a first pulse threshold, the transmitting coil and the receiving coil are determined to be aligned, when the difference is between the first pulse threshold and a second pulse threshold, the transmitting coil and the receiving coil are determined not to be completely aligned but to transmit power, and when the difference is larger than the second pulse threshold, the transmitting coil and the receiving coil are determined not to be transmittable.
A wireless power transfer system comprising the electric vehicle wireless power transmitting device as described in any one of the above items or the electric vehicle wireless power receiving device as described in any one of the above items.
An electric vehicle comprises the electric vehicle wireless power receiving device.
This application can respond to battery power in wireless charging, carries out the real-time adjustment of power, extension electric automobile battery life.
Drawings
Fig. 1 is a schematic diagram of a wireless power transfer system of the present application.
Detailed Description
Fig. 1 is a schematic diagram of a wireless power transfer system according to the present application, which includes a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting apparatus and the wireless power receiving apparatus perform wireless power transmission through the transmitting coil and the receiving coil.
The application provides an electric automobile wireless power transmission device, includes: the wireless power transmission device comprises a wireless power transmission coil, a first alignment adjusting device, a first charging time control module and a first power controller, wherein the first alignment adjusting device comprises a control module, a transverse axis adjusting module, a longitudinal axis adjusting module and a receiving coil detecting module, the receiving coil detecting module comprises a pulse transmitting unit, a feedback unit and an output unit, the pulse transmitting unit transmits at least one pulse signal, the feedback unit judges the position information of the receiving coil according to the feedback signal of the pulse signal responded by the receiving coil, the first charging time control module controls the charging completion time, and the first power controller controls the wireless power transmission coil to transmit wireless power according to the charging completion time.
The wireless power transmitting device of the electric automobile, wherein the first charging time control module comprises an electric quantity detection unit and a prediction unit; after the electric quantity detection unit receives the output unit alignment confirmation information of the receiving coil detection module, the residual electric quantity detection is carried out on the battery of the electric automobileThe prediction unit predicts a charging completion time T based on the remaining power detection resultset(ii) a The prediction unit carries out charging completion time T according to the neural networksetAnd (6) predicting.
The wireless power transmitting device of the electric vehicle, wherein the first power controller controls the wireless power transmitting coil to transmit the wireless power according to the charging completion time, and the first power controller specifically comprises:
when the electric quantity of a lithium battery in the electric automobile is less than 30%, the quick charging mode is started to charge the electric automobile in a wireless mode, the electric quantity of the battery is measured in real time in the charging process, when the electric quantity of the lithium battery is detected to be increased to 30%, the quick charging mode is closed, and the wireless power transmitting device is timed to obtain the electric quantity recovery time T in the charging processrestore；
When the battery capacity reaches 30%, the wireless power transmitting apparatus calculates the remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreObtaining the quick charging characteristic of the battery, and predicting the time T required by the battery to quickly charge from 30% of electric quantity to 100% of electric quantity according to the quick charging characteristicfullAnd predicting the time T required by the lithium battery to rapidly charge from 50% of the electric quantity to 100% of the electric quantityh-full；
Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullAnd controlling the charging mode according to the judgment result.
The wireless power transmitting device of the electric automobile, wherein the wireless power transmitting device judges TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullIn the meantime, even if the rapid charging mode is adopted all the time, the wireless power transmitting device starts the rapid charging only when the battery just reaches the full-charge state or even cannot reach the full-charge state when the expected charging completion time arrivesCharging a lithium battery in the electric automobile in a mode;
when T isresiGreater than TfullThe wireless power transmitting device calculates the trickle charge time T when the expected charge completion time is sufficient for the battery to be fully charged and there is a remainderslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
The utility model provides an electric automobile wireless power receiving arrangement, includes wireless power receiving coil, second alignment adjusting device, battery management unit BMS, second alignment adjusting device includes control module, cross axle adjusting module, axis of ordinates adjusting module, sending coil detection module includes pulse sending unit, feedback unit, output unit, pulse sending unit sends at least a pulse signal, feedback unit basis receiving coil response the feedback signal of pulse signal judges sending coil's position information, battery management unit BMS carries out the time control of accomplishing of charging, sends wireless power according to the wireless power sending coil of the time control of accomplishing of charging.
The wireless power receiving device of the electric vehicle, wherein the battery management unit BMS controls a charging completion time, and the controlling of the wireless power transmitting coil to transmit the wireless power according to the charging completion time specifically includes:
(1) the battery management system BMS in the electric automobile detects the electric quantity of a lithium battery in the electric automobile, when the electric quantity of the lithium battery in the electric automobile is less than 30%, the BMS sends the electric quantity of the lithium battery and an instant charging request to a wireless power transmitting device through a communication device, the wireless power transmitting device detects received information, and when the information is the instant charging request and the electric quantity of the lithium battery is less than the electric quantity of the lithium batteryOpen the quick charge mode immediately when 30% and charge to the lithium cell through wireless mode, BMS real-time measurement lithium cell electric quantity in the charging process and transmit real-time measurement's lithium cell electric quantity numerical value for wireless power transmitting device through communication device, detect when the lithium cell electric quantity promotes to 30% when wireless power transmitting device, close the quick charge mode, stop charging, wireless power transmitting device timekeeping simultaneously obtains electric quantity recovery time T in the charging processrestore；
(2) When the electric quantity of the lithium battery reaches 30%, the expected charging completion time T is obtained through the communication devicesetTransmitting to a wireless power transmitting apparatus, the wireless power transmitting apparatus calculating a remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreObtaining the quick charging characteristic of the lithium battery, and predicting the time T required by the lithium battery to quickly charge from 30% of electric quantity to 100% of electric quantity according to the quick charging characteristicfullAnd predicting the time T required by the lithium battery to rapidly charge from 50% of the electric quantity to 100% of the electric quantityh-full；
(3) Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullAnd controlling the charging mode according to the judgment result.
The wireless power receiving device of the electric automobile, wherein the wireless power transmitting device judges TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullWhen the charging is finished, the wireless power transmitting device starts a quick charging mode to charge the lithium battery in the electric automobile, namely, even if a quick charging mode is always adopted, the lithium battery can only just reach a full-charge state or even can not reach the full-charge state when the expected charging completion time arrives;
when T isresiGreater than TfullWhen the expected charge completion time is sufficient for the lithium battery to be fully charged and there is a remainder,wireless power transmission device calculates trickle charge time Tslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
The feedback unit sets a standard pulse number, the pulse signal transmitting unit transmits a series of pulse signals in a predetermined period, the feedback unit detects the number of the received pulse signals fed back by the receiving coil, when the difference between the standard pulse number and the fed-back pulse signals is smaller than a first pulse threshold, the transmitting coil and the receiving coil are determined to be aligned, when the difference is between the first pulse threshold and a second pulse threshold, the transmitting coil and the receiving coil are determined not to be completely aligned but to transmit power, and when the difference is larger than the second pulse threshold, the transmitting coil and the receiving coil are determined not to be transmittable.
A wireless power transfer system comprising the electric vehicle wireless power transmitting device as described in any one of the above items or the electric vehicle wireless power receiving device as described in any one of the above items.
An electric vehicle comprises the electric vehicle wireless power receiving device.
This application can respond to battery power in wireless charging, carries out the real-time adjustment of power, extension electric automobile battery life.
It should be noted that the above-mentioned embodiments are provided for further detailed description of the present invention, and the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make various modifications and variations on the above-mentioned embodiments without departing from the scope of the present invention.
Claims (5)
1. An electric vehicle wireless power transmission device, characterized by comprising: the wireless power transmission device comprises a wireless power transmission coil, a first alignment adjusting device, a first charging time control module and a first power controller, wherein the first alignment adjusting device comprises a control module, a transverse axis adjusting module, a longitudinal axis adjusting module and a receiving coil detecting module, the receiving coil detecting module comprises a pulse transmitting unit, a feedback unit and an output unit, the pulse transmitting unit transmits at least one pulse signal, the feedback unit responds to a feedback signal of the pulse signal to judge the position information of the receiving coil, the first charging time control module controls the charging completion time, and the first power controller controls the wireless power transmission coil to transmit wireless power according to the charging completion time; the first charging time control module comprises an electric quantity detection unit and a prediction unit; the electric quantity detection unit detects the residual electric quantity of the battery of the electric automobile after receiving the output unit alignment confirmation information of the receiving coil detection module, and the prediction unit predicts the charging completion time T according to the residual electric quantity detection resultset(ii) a The prediction unit carries out charging completion time T according to the neural networksetPredicting; the first power controller controlling the wireless power transmitting coil to transmit the wireless power according to the charging completion time specifically includes:
when the electric quantity of a lithium battery in the electric automobile is less than 30%, the quick charging mode is started to charge the electric automobile in a wireless mode, the electric quantity of the battery is measured in real time in the charging process, when the electric quantity of the lithium battery is detected to be increased to 30%, the quick charging mode is closed, and the wireless power transmitting device is timed to obtain the electric quantity recovery time T in the charging processrestore；
When the battery capacity reaches 30%, the wireless power transmitting apparatus calculates the remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreTo obtain the batteryFast charging characteristic, and predicting the time T required for the battery to be fast charged from 30% to 100% according to the fast charging characteristicfullAnd predicting the time T required by the lithium battery to rapidly charge from 50% of the electric quantity to 100% of the electric quantityh-full；
Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullThe charging mode is controlled according to the judgment result; the wireless power transmitting apparatus determines TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullWhen the battery is in the full-charge state, the wireless power transmitting device starts a quick-charge mode to charge the lithium battery in the electric automobile;
when T isresiGreater than TfullThe wireless power transmitting device calculates the trickle charge time T when the expected charge completion time is sufficient for the battery to be fully charged and there is a remainderslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
2. The wireless power receiving device of the electric automobile is characterized by comprising a wireless power receiving coil, a second alignment regulating device and a battery management unit BMS, wherein the second alignment regulating device comprises a control module, a transverse axis regulating module, a longitudinal axis regulating module and a sending coil detecting module, the sending coil detecting module comprises a pulse sending unit, a feedback unit and an output unit, the pulse sending unit sends at least one pulse signal, the feedback unit responds to the feedback signal of the pulse signal to judge the position information of the sending coil, and the battery management unit BMS controls the charging completion time and controls the wireless power sending coil to send wireless power according to the charging completion time; the battery management unit BMS controls a charging completion time, and controlling the wireless power transmitting coil to transmit the wireless power according to the charging completion time specifically includes:
(1) the battery management system BMS among the electric automobile detects the electric quantity of lithium cell among the electric automobile, when lithium cell electric quantity is less than 30% among the electric automobile, BMS passes through communication device and sends lithium cell electric quantity and charge request at once to wireless power transmitting device, wireless power transmitting device detects the information received, when information for charge request at once and lithium cell electric quantity is less than 30% open the quick charge mode immediately and charge to the lithium cell through wireless mode, BMS real-time measurement lithium cell electric quantity in the charging process and transmit real-time measurement's lithium cell electric quantity numerical value to wireless power transmitting device through communication device, when wireless power transmitting device detects that lithium cell electric quantity promotes to 30%, close the quick charge mode, stop charging, wireless power transmitting device in the charging process counts time simultaneously and obtains electric quantity recovery time Trestore；
(2) When the electric quantity of the lithium battery reaches 30%, the expected charging completion time T is obtained through the communication devicesetTransmitting to a wireless power transmitting apparatus, the wireless power transmitting apparatus calculating a remaining time Tresi，Tresi=Tset-TrestoreAnd simultaneously, according to the difference value between the battery electric quantity and 30 percent of electric quantity when the lithium battery is connected and the electric quantity recovery time TrestoreObtaining the quick charging characteristic of the lithium battery, and predicting the time T required by the lithium battery to quickly charge from 30% of electric quantity to 100% of electric quantity according to the quick charging characteristicfullAnd predicting the time T required by the lithium battery to rapidly charge from 50% of the electric quantity to 100% of the electric quantityh-full；
(3) Wireless power transmitting apparatus determination TresiAnd Tfull、Th-fullIs close toPerforming charging mode control according to the judgment result; the wireless power transmitting apparatus determines TresiAnd Tfull、Th-fullThe controlling the charging mode according to the judgment result specifically comprises:
when T isresiNot more than TfullWhen the charging is finished, the wireless power transmitting device starts a quick charging mode to charge the lithium battery in the electric automobile, namely, even if a quick charging mode is always adopted, the lithium battery can only just reach a full-charge state or even can not reach the full-charge state when the expected charging completion time arrives;
when T isresiGreater than TfullThe wireless power transmitting apparatus calculates the trickle charge time T when the charging completion time is expected to be sufficient for the lithium battery to be fully charged and there is a remainderslow，Tslow=Tresi-Th-fullThe wireless power transmitting device is based on a trickle charge time TslowSelecting the trickle current value to be set, and the trickle charge time TslowThe larger the trickle current value is, the smaller the trickle current value is, the trickle charging mode is firstly started by the wireless power transmitting device to carry out trickle charging on the lithium battery in the electric automobile, the trickle charging mode is closed until the electric quantity of the lithium battery reaches 50%, and then the quick charging mode is started to carry out quick charging on the lithium battery in the electric automobile.
3. The wireless power receiving device of claim 2, wherein the feedback unit sets a standard pulse number, the pulse signal transmitting unit transmits a series of pulse signals in a predetermined period, the feedback unit detects the number of received pulse signals fed back by the receiving coil, the feedback unit determines that the transmitting coil and the receiving coil are aligned when a difference between the standard pulse number and the fed-back pulse number is smaller than a first pulse threshold, determines that the transmitting coil and the receiving coil are not completely aligned but transmit power is available when the difference is between the first pulse threshold and a second pulse threshold, and determines that the transmit power is unavailable when the difference is larger than the second pulse threshold.
4. A wireless power transfer system comprising the wireless power transmitting apparatus of an electric vehicle according to claim 1 or the wireless power receiving apparatus of an electric vehicle according to any one of claims 2 to 3.
5. An electric vehicle characterized by comprising an electric vehicle wireless power receiving apparatus according to any one of claims 2 to 3.
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| CN105186593A (en) * | 2015-07-22 | 2015-12-23 | 厦门新页科技有限公司 | Electric vehicle wireless charging transmitting and receiving automatic alignment system |
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| CN108206569A (en) | 2018-06-26 |
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