JP2013172506A - Non-contact power supply system, non-contact power supply unit, non-contact power receiving unit and non-contact power supply method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact power supply system capable of supplying electric power to a vehicle, with high power transmission efficiency.SOLUTION: A non-contact power supply system comprises: a power receiving circuit 46 for rectifying electric power received by a secondary coil 47 mounted on a vehicle to charge a battery 5; a primary coil 27 disposed in a stopping/parking area; a power supply circuit 26 for converting electric power supplied to the primary coil 27 into a frequency; standby power supply means 26 for preliminarily supplying electric power from the primary coil 27 to the secondary coil 47 at a predetermined voltage value before starting electric power supply from the primary coil 27 to the secondary coil 47; means 29 for detecting voltage or current at a predetermined position in the secondary coil 47 and the power receiving circuit 46 when the standby power supply means 26 supplies the electric power; and determining means 22 for determining whether or not the detected value is smaller than a predetermined value. When the determining means 22 determines that it is not, the electric power supply is started.

Description

  The present invention relates to a non-contact power supply system that supplies power to a vehicle in a non-contact state, a non-contact power supply apparatus, a non-contact power reception apparatus, and a non-contact power supply method.

Vehicles such as plug-in hybrid vehicles or electric vehicles that can be powered from a household power source and can be driven by a motor are widely used as vehicles that can reduce carbon dioxide emissions and fuel consumption. ing.
As a power supply device that supplies power to a battery mounted on a vehicle, a power supply device that supplies power in a non-contact state to a power reception device that is mounted on a vehicle and charges the battery is being studied because it saves the trouble of connecting a power supply cable. .
Among the methods for realizing non-contact power feeding, the non-radiation method using electromagnetic induction or magnetic resonance and the radiation method using electromagnetic waves are the mainstream, and in particular, the non-radiation method is considered prominent in vehicles. ing.

  Patent Document 1 includes a first contactless power supply device having a power reception unit, a second contactless power supply device having a power transmission unit, a measurement unit that measures a parameter related to power transmission efficiency between the power transmission unit and the power reception unit, and The determination apparatus used for a non-contact electric power feeding system provided with this is disclosed. Either one of the first and second contactless power supply devices is movable, and an acquisition unit that acquires parameters, and between the first contactless power supply device and the second contactless power supply device based on a time change of the parameters. And a controller that outputs information representing the relative positional relationship.

JP 2011-205749 A

In the non-contact power supply using electromagnetic induction or magnetic resonance, there is a problem that if a large amount of power is input to the power transmission device in a state where the power transmission efficiency is low, the power transmission device may be wastefully consumed and a failure may occur in the power transmission device.
In the determination apparatus disclosed in the cited document 1, a relative position is identified from a change in power transmission efficiency and a position with the highest efficiency is searched for. However, a decrease in efficiency due to factors other than the relative position (contamination of foreign matter or the like) is considered. Not.

The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a non-contact power feeding system that can feed power to a vehicle with high power transmission efficiency.
Another object of the present invention is to provide a non-contact power supply apparatus that is preferably used in a non-contact power supply system that can supply power to a vehicle with high power transmission efficiency.
Another object of the present invention is to provide a non-contact power receiving apparatus that is preferably used in a non-contact power feeding system that can feed power to a vehicle with high power transmission efficiency.
Another object of the present invention is to provide a non-contact power feeding method that can feed power to a vehicle with high power transmission efficiency.

  A non-contact power feeding system according to a first aspect of the present invention includes a secondary coil mounted on a vehicle, a power receiving circuit that rectifies power received by the secondary coil and charges the battery, and a parking / stopping area where the vehicle is parked and stopped. Before starting to supply power by electromagnetic induction or magnetic resonance from the primary coil arranged, a power supply circuit that converts the power supplied to the primary coil to a predetermined frequency, and the primary coil to the secondary coil, a predetermined voltage value A non-contact power supply system comprising: preliminary power supply means for preliminarily supplying power from the primary coil to the secondary coil, wherein the secondary coil is configured to supply power when the standby power supply means supplies power. And a means for detecting a voltage value or a current value at a predetermined position in the power receiving circuit, and a determining means for determining whether the voltage value or the current value detected by the means is smaller than a predetermined value. No When it is determined, characterized in that is arranged to start the power supply.

  In the non-contact power feeding system according to the first invention and the non-contact power feeding method according to the fourteenth invention, the power receiving circuit rectifies the power received by the secondary coil mounted on the vehicle and charges the battery, The electric power supplied to the primary coil arrange | positioned at a parking stop area is converted into a predetermined frequency. Prior to starting power supply from the primary coil to the secondary coil by electromagnetic induction or magnetic resonance, the standby power supply means preliminarily supplies power from the primary coil to the secondary coil at a predetermined voltage value. When the standby power supply means supplies power, the voltage value or current value at a predetermined position in the secondary coil and the power receiving circuit is detected, and whether or not the detected voltage value or current value is smaller than the predetermined value. When the determination is NO, the power supply is started.

  The non-contact power feeding system according to the second invention is characterized by comprising means for notifying when the determination means determines that the determination means is smaller than a predetermined value.

  In the non-contact power supply system according to the second aspect of the invention, when the determination means determines that it is smaller than the predetermined value, the user is notified, so that the user can move the vehicle to a position where the power transmission efficiency is high, and other factors Can be confirmed.

  A contactless power supply system according to a third aspect of the present invention includes a secondary coil mounted on a vehicle, a power receiving circuit that rectifies the power received by the secondary coil and charges the battery, and a parking / stopping area where the vehicle is parked and stopped. Before starting to supply power by electromagnetic induction or magnetic resonance from the primary coil arranged, a power supply circuit that converts the power supplied to the primary coil to a predetermined frequency, and the primary coil to the secondary coil, a predetermined voltage value In the non-contact power feeding system comprising: preliminary power supply means for preliminarily supplying power from the primary coil to the secondary coil, when the standby power supply means is supplying power, the primary coil and A means for detecting a voltage value or a current value at a predetermined position in the power supply circuit; and a determination means for determining whether the voltage value or the current value detected by the means is larger than a predetermined value. no When it is determined, characterized in that is arranged to start the power supply.

  In the non-contact power feeding system according to the third invention and the non-contact power feeding method according to the fifteenth invention, the power receiving circuit rectifies the power received by the secondary coil mounted on the vehicle and charges the battery, The electric power supplied to the primary coil arrange | positioned at a parking stop area is converted into a predetermined frequency. Prior to starting power supply from the primary coil to the secondary coil by electromagnetic induction or magnetic resonance, the standby power supply means preliminarily supplies power from the primary coil to the secondary coil at a predetermined voltage value. When the standby power supply means supplies power, the voltage value or current value at a predetermined position in the primary coil and the power feeding circuit is detected, and whether or not the detected voltage value or current value is larger than the predetermined value. When the determination is made and the determination is NO, power supply is started.

  The contactless power supply system according to a fourth aspect of the invention is characterized by comprising means for notifying when the determination means determines that the determination means is greater than a predetermined value.

  In the non-contact power supply system according to the fourth aspect of the invention, when the determination means determines that it is larger than the predetermined value, the user is notified, so that the user can move the vehicle to a position where the power transmission efficiency is high, and other factors Can be confirmed.

  The contactless power supply system according to a fifth aspect of the invention is characterized in that the predetermined voltage value is lower than a voltage value generated when the power is supplied.

  In the contactless power supply system according to the fifth aspect of the present invention, the predetermined voltage value supplied by the standby power supply means is lower than the voltage value generated at the time of power supply, so it is possible to reduce wasteful power consumption. .

  The contactless power supply system according to a sixth aspect of the present invention further comprises means for detecting a terminal voltage value of the battery before the standby power supply means supplies power, wherein the predetermined value is the terminal voltage detected by the means. It is configured to be determined according to a value.

  In the non-contact power supply system according to the sixth aspect of the invention, before the standby power supply means supplies power, the terminal voltage value of the battery is detected, and the predetermined value for determining the power transmission efficiency is the detected terminal voltage value. Therefore, even if the terminal voltage value of the battery changes each time power is supplied, power can be supplied with optimum efficiency.

  According to a seventh aspect of the present invention, there is provided a non-contact power feeding device comprising: a coil disposed in a parking / stopping zone where a vehicle is parked and stopped; a power feeding circuit that converts power supplied to the coil into a predetermined frequency; and electromagnetic induction or magnetic resonance from the coil. Before starting the power supply by the above, a non-contact power supply device comprising a preliminary power supply means for preliminarily supplying power from the coil at a predetermined voltage value, wherein the standby power supply means supplies power A means for receiving a voltage value or a current value from the vehicle side, and a determining means for determining whether the voltage value or the current value received by the means is smaller than a predetermined value. The power supply is configured to start when it is determined that

  In the non-contact power feeding device according to the seventh aspect of the invention, the power feeding circuit converts the power supplied to the coil arranged in the parking and stopping area into a predetermined frequency, and before starting the power supply by electromagnetic induction or magnetic resonance from the coil, Preliminary power supply means preliminarily supplies power from the coil at a predetermined voltage value. When the reserve power supply means supplies power, accepts a voltage value or current value from the vehicle side, determines whether the received voltage value or current value is smaller than a predetermined value, and determines that it is not Then, power supply is started.

  The contactless power feeding device according to an eighth aspect of the present invention includes a means for notifying when the determination means determines that the determination means is smaller than a predetermined value.

  In the non-contact power feeding device according to the eighth aspect of the invention, since the notification is made when the determination means determines that it is smaller than the predetermined value, the user can move the vehicle to a position where the power transmission efficiency is high, and other factors Can be confirmed.

  A non-contact power feeding device according to a ninth aspect of the present invention is a coil disposed in a parking and stopping area where a vehicle is parked and stopped, a power feeding circuit that converts electric power supplied to the coil into a predetermined frequency, and electromagnetic induction or magnetic resonance from the coil. Before starting the power supply by the above, a non-contact power supply device comprising a preliminary power supply means for preliminarily supplying power from the coil at a predetermined voltage value, wherein the standby power supply means supplies power A means for detecting a voltage value or a current value at a predetermined position in the coil and the power feeding circuit, and a determination means for determining whether the voltage value or the current value detected by the means is larger than a predetermined value. And a non-contact power feeding apparatus configured to start the power supply when the determination unit determines NO.

  In the contactless power supply device according to the ninth aspect of the present invention, the power supply circuit converts the power supplied to the coil disposed in the parking and stopping area into a predetermined frequency, and before starting the power supply from the coil by electromagnetic induction or magnetic resonance, Preliminary power supply means preliminarily supplies power from the coil at a predetermined voltage value. When the standby power supply means supplies power, the voltage value or current value at a predetermined position in the coil and the power feeding circuit is detected, and it is determined whether the detected voltage value or current value is larger than the predetermined value. When it is determined as NO, power supply is started.

  A non-contact power feeding device according to a tenth aspect of the present invention is characterized by comprising means for informing when the determination means determines that the determination means is greater than a predetermined value.

  In the non-contact power feeding device according to the tenth invention, since the notification is made when the determination means determines that it is larger than the predetermined value, the user can move the vehicle to a position where the power transmission efficiency is high, and other factors Can be confirmed.

  The non-contact power feeding device according to an eleventh aspect is characterized in that the predetermined voltage value is lower than a voltage value generated when the power is supplied.

  In the non-contact power feeding device according to the eleventh aspect of the invention, the predetermined voltage value supplied by the standby power supply means is lower than the voltage value generated at the time of power supply, so that wasteful power consumption can be reduced. .

  The contactless power feeding device according to a twelfth aspect of the present invention further includes means for receiving a voltage value from the vehicle before the standby power supply means supplies power, and the predetermined value is equal to the voltage value received by the means. It is configured so as to be determined accordingly.

  In the contactless power supply device according to the twelfth aspect of the present invention, before the standby power supply means supplies power, a voltage value is received from the vehicle side, and a predetermined value for determining power transmission efficiency is determined according to the voltage value. Therefore, even when the terminal voltage value of the battery changes each time power is supplied, power can be supplied with optimum efficiency.

  A non-contact power receiving apparatus according to a thirteenth aspect of the present invention includes a coil mounted on a vehicle and a power receiving circuit that rectifies the power received by the coil and charges the battery, and the power by electromagnetic induction or magnetic resonance to the coil. A contactless power receiving device configured to receive a preliminary power supply to the coil before the supply is started, the terminal voltage value of the battery before receiving the preliminary power supply Detecting means, threshold means for determining a voltage or current threshold according to a terminal voltage value detected by the means, and a predetermined position in the coil and the power receiving circuit when receiving the preliminary power supply. And a means for transmitting the voltage value or current value detected by the means and the threshold value determined by the threshold means to the outside.

  In the contactless power receiving device according to the thirteenth aspect of the invention, the power receiving circuit rectifies the power received by the coil mounted on the vehicle and charges the battery, before the power supply to the coil by electromagnetic induction or magnetic resonance is started. In addition, a preliminary power supply to the coil is received. Before receiving the preliminary power supply, the terminal voltage value of the battery is detected, and the threshold means determines the voltage or current threshold according to the detected terminal voltage value. When receiving preliminary power supply, the voltage value or current value at a predetermined position in the coil and the power receiving circuit is detected, and the detected voltage value or current value and the threshold value determined by the threshold means are transmitted to the outside. .

  A contactless power feeding method according to a fourteenth aspect of the present invention is provided in a secondary coil mounted on a vehicle, a power receiving circuit that rectifies the power received by the secondary coil and charges the battery, and a parking / stopping area where the vehicle is parked and stopped. A primary coil disposed and a power supply circuit that converts electric power supplied to the primary coil into a predetermined frequency, and before starting power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil, A non-contact power feeding method of a non-contact power feeding system that preliminarily supplies power from the primary coil to the secondary coil with a voltage value, wherein the secondary coil and the power receiving power are supplied when the preliminary power is supplied. A voltage value or a current value at a predetermined position in the circuit is detected, it is determined whether the detected voltage value or current value is smaller than a predetermined value, and the power supply is started when it is determined not. Features.

  A contactless power feeding method according to a fifteenth aspect of the present invention is provided in a secondary coil mounted on a vehicle, a power receiving circuit that rectifies the power received by the secondary coil and charges the battery, and a parking / stopping area where the vehicle is parked and stopped. A primary coil disposed and a power supply circuit that converts electric power supplied to the primary coil into a predetermined frequency, and before starting power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil, A non-contact power feeding method of a non-contact power feeding system that preliminarily supplies power from the primary coil to the secondary coil with a voltage value, wherein the primary coil and the power feeding circuit when the preliminary power is supplied A voltage value or a current value at a predetermined position is detected, it is determined whether the detected voltage value or current value is larger than a predetermined value, and the power supply is started when it is determined not. And

  According to the contactless power supply system according to the first to sixth inventions, a contactless power supply system that can supply power to a vehicle with high power transmission efficiency can be realized.

  According to the non-contact power feeding devices according to the seventh to twelfth inventions, it is possible to realize a non-contact power feeding device suitably used for a non-contact power feeding system that can feed power to a vehicle with high power transmission efficiency.

  According to the non-contact power receiving device according to the thirteenth aspect of the present invention, it is suitably used for a non-contact power supply system that can supply power to a vehicle with high power transmission efficiency, even when the terminal voltage value of the battery changes each time power is supplied. A contactless power receiving device that can receive power with optimum efficiency can be realized.

  According to the contactless power supply methods according to the fourteenth and fifteenth inventions, it is possible to realize a contactless power supply method that can supply power to a vehicle with high power transmission efficiency.

It is a see-through | perspective side view which shows typically the structure of embodiment of the non-contact electric power feeding system which concerns on this invention. It is a block diagram which shows the principal part structure of embodiment of the non-contact electric power feeding system, non-contact electric power feeder, non-contact electric power receiving apparatus, and non-contact electric power feeding method which concern on this invention. It is a flowchart which shows the example of operation | movement of a non-contact electric power feeding system. It is a flowchart which shows the example of operation | movement of a non-contact electric power feeding system. It is a flowchart which shows the example of operation | movement of a non-contact electric power feeding system. It is a flowchart which shows the example of operation | movement of a non-contact electric power feeding system.

Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a perspective side view schematically showing a configuration of an embodiment of a non-contact power feeding system according to the present invention. In this non-contact power supply system, the vehicle 100 is parked in a parking area 200 in a forward direction.

  The parking / stopping area 200 has a central portion arranged vertically or vertically below a car stopper 211, 211 constituted by a recess for dropping the left and right front wheels 111, 111 from the floor (ground), and a middle part of the car stopper 211, 211. A power transmission coil 27. The power transmission coil 27 is wound in a spiral shape in a plane parallel to the floor portion, and has a substantially circular shape in plan view.

  The vehicle 100 includes a power receiving coil 47 having a central portion arranged vertically above or vertically below an intermediate portion between the left and right front wheels 111. The power reception coil 47 is coupled to the power transmission coil 27 by electromagnetic induction or magnetic resonance, is wound in a spiral shape in a plane parallel to the bottom of the vehicle 100, and has a substantially circular shape in plan view. .

FIG. 2 is a block diagram showing the main configuration of the first embodiment of the non-contact power feeding system, the non-contact power feeding device, the non-contact power receiving device, and the non-contact power feeding method according to the present invention.
The non-contact power feeding system 1 includes a power feeding device 2 (non-contact power feeding device) and a power receiving device (non-contact power receiving device) 4.
The power supply device 2 includes a notification unit 21, a control unit 22, a reception unit 23, a communication unit 24, a storage unit 25, a current supply unit (power supply circuit) 26, a power transmission coil 27, and a voltage detector 28 in the current supply unit 26. Have.

The control unit 22 is connected to the reception unit 23, the communication unit 24, and the storage unit 25 via a common bus, and is directly connected to the current supply unit 26. Both ends of the power transmission coil 27 are connected to a current supply unit 26 that is supplied with power from the commercial power source 3.
The voltage detector 28 detects a voltage value at a predetermined position in the power transmission coil 27 and the current supply unit 26 (for example, a voltage value across the capacitor, a voltage value across the coil, etc.), and the detected voltage value is sent to the control unit 22. Given. In the first embodiment, the voltage detector 28 may not be provided.

The control unit 22 is composed of components such as a microcomputer and a comparator, and compares the voltage value supplied from the voltage detector 28 with a reference voltage value (predetermined value).
When the communication unit 24 receives a start signal from a communication unit 41 (described later) of the power receiving device 4, the control unit 22 reads the authentication information of the power receiving device 4 included in the start signal and stores the read authentication information in the storage unit 25. To do.

When the communication unit 24 receives a start signal from the communication unit 41 of the power receiving device 4, the control unit 22 instructs the communication unit 24 to establish one-to-one communication between the power feeding device 2 and the power receiving device 4. A notification signal for notifying that one communication has been established is transmitted to the communication unit 41.
After transmitting the notification signal, the control unit 22 performs a precharge (preliminary power supply), which will be described later, for determining whether or not the power transmission efficiency is in a range where power can be normally supplied, and the range where the power transmission efficiency can be normally supplied. If so, the current supply unit 26 is instructed to start power supply from the power transmission coil 27.
The notification unit 21 provides visual or auditory notification when the power transmission efficiency is not within a range where power can be normally supplied.

  When the receiving unit 23 receives an instruction to stop power supply to the battery 5 while the alternating current is supplied to the power transmission coil 27, the control unit 22 instructs the current supply unit 26 to supply current to the power transmission coil 27. Stop supplying. Further, when the communication unit 24 receives a stop signal instructing to stop power supply from the power receiving device 4 to the battery 5, and the authentication information included in the received stop signal matches the authentication information stored in the storage unit 25. Then, the current supply unit 26 is instructed to stop the current supply to the power transmission coil 27.

The receiving unit 23 includes a plurality of buttons and a touch panel. When the button or the like is operated by the user and a stop instruction is received, the reception unit 23 notifies the control unit 22 to that effect.
The communication unit 24 receives a start signal from the communication unit 41 and outputs the received start signal to the control unit 22. Further, the communication unit 24 wirelessly transmits a notification signal including authentication information to the communication unit 41 in accordance with an instruction from the control unit 22.
The storage unit 25 stores authentication information of the power receiving device 4, and authentication information is stored and read out by the control unit 22.

The current supply unit 26 supplies current to the power transmission coil 27 in accordance with an instruction from the control unit 22. When supplying current, the current supply unit 26 converts the electric power from the commercial power supply 3 into a high frequency, for example, an alternating current of several tens of kHz, and supplies it to both ends of the power transmission coil 27.
The power transmission coil 27 is configured by a loop coil, a spiral coil, a coil in which a conductive wire is wound around a magnetic core, or the like, and an alternating current is supplied by the current supply unit 26. When AC current is supplied to the power transmission coil 27, AC power is generated from the power reception coil 47 by electromagnetic induction.

The power reception device 4 includes a control unit 40, a communication unit 41, a reception unit 42, a display unit 43, a storage unit 44, a time measurement unit 45, a power conversion unit (power reception circuit) 46, a power reception coil 47, and a voltage in the power conversion unit 46. Detectors 29 and 30 are provided.
The control unit 40 is connected to the communication unit 41, the reception unit 42, the display unit 43, the storage unit 44, the time measuring unit 45, and the power conversion unit 46 through a common bus. The power conversion unit 46 is connected to both ends of the battery 5. The voltage detector 30 detects the voltage value across the battery 5, and the detected voltage value across the battery 5 is given to the control unit 40.

  Both ends of the power receiving coil 47 are connected to the power converter 46. The voltage detector 29 detects a voltage value at a predetermined position in the power receiving coil 47 and the power conversion unit 46 (for example, a voltage value at both ends of the diode, a voltage value at both ends of the choke coil), and the detected voltage value is the control unit 40. Given to.

When the receiving unit 42 receives a start instruction, the control unit 40 including a microcomputer reads the authentication information of the power receiving device 4 from the storage unit 44 and sends a start signal including the read authentication information from the communication unit 41 to the power supply device 2. The data is transmitted to the communication unit 24.
After transmitting the start signal from the communication unit 41 to the communication unit 24, the control unit 40 instructs the time measuring unit 45 to time the time waiting for receiving the notification signal from the communication unit 24, and Wait until the unit 41 receives the notification signal. When the communication unit 41 has not received a notification signal from the communication unit 24 even after the predetermined time has elapsed, the control unit 40 has not established a one-to-one communication between the power supply device 2 and the power reception device 4. A message to that effect is output to the display unit 43 and the standby is completed.

When the communication unit 41 receives the notification signal within a predetermined time, the control unit 40 determines whether the reception unit 42 has received a stop instruction and whether the battery 5 is fully charged. Whether the battery 5 is fully charged is determined by the control unit 40 being given a voltage value across the battery 5 detected by the voltage detector 30 and determining whether the given voltage value is equal to or greater than a predetermined voltage value. Determine whether or not.
When the receiving unit 42 receives a stop instruction while the power conversion unit 46 is supplying power to the battery 5, or when the voltage of the battery 5 exceeds a predetermined voltage value, the control unit 40 is fully charged. If it is determined that there is, the communication unit 41 is instructed to transmit a stop signal including authentication information of the power receiving device 4 to the communication unit 24 of the power feeding device 2.

The communication unit 41 wirelessly transmits a start signal or a stop signal to the communication unit 24 in accordance with an instruction from the control unit 40.
The receiving unit 42 includes a plurality of buttons, a touch panel, and the like. The buttons are operated by the user to receive a start instruction and a stop instruction, and notify the control unit 40 accordingly.

  When the message is received from the control unit 40, the display unit 43 displays the received message. As a result, the user is notified that the one-to-one communication has not been established between the power feeding device 2 and the power receiving device 4, and the user can be prompted to operate the reception unit 42 to instruct the start of power feeding again. .

The storage unit 44 stores authentication information of the power receiving device 4 and is read out by the control unit 40.
The timer 45 starts and ends timing according to the instruction of the controller 40, and measures the waiting time that is waiting for the communication unit 41 to receive the notification signal after transmitting the start signal.

The power converter 46 rectifies the AC power output from the power receiving coil 47 to convert it to DC power, and supplies the converted DC power to the battery 5.
Similarly to the power transmission coil 27, the power reception coil 47 is configured by a loop coil, a spiral coil, a coil in which a conductive wire is wound around a magnetic core, or the like. The power receiving coil 47 is supplied with a high-frequency AC current to the power transmission coil 27, and high-frequency AC power is generated by electromagnetic induction. The generated AC power is output to the power converter 46.

3 and 4 are flowcharts showing an example of the operation of the non-contact power feeding system 1.
The control unit 40 stands by while determining whether or not the reception unit 42 has received a start instruction (S23). When the reception unit 42 has received a start instruction, the voltage detector 30 receives the terminal voltage of the battery 5. A value is detected (S25).

  The control unit 40 determines a voltage threshold (predetermined value) for determining whether or not the power transmission efficiency is within a normal range based on the terminal voltage value (S25) of the battery 5 detected by the voltage detector 30. (S27). The voltage threshold defines a normal range of the detection voltage value of the voltage detector 29 corresponding to the normal range of power transmission efficiency, and this normal range is a range larger than the voltage threshold. The voltage detector 29 detects voltage values (for example, voltage values at both ends of the diode, voltage values at both ends of the choke coil) at predetermined positions in the power receiving coil 47 and the power conversion unit 46.

Next, the control unit 40 causes the communication unit 41 to transmit a start signal and the determined voltage threshold (normal range) (S29).
In the flowchart, the above-described operation related to the authentication information, the timing operation for the standby time, and the like are omitted.

  The control unit 22 waits while determining whether or not the communication unit 24 has received the start signal and the voltage threshold (S1). When the control unit 22 receives the start signal, the control unit 22 precharges the standby current supply 26 (reserve power supply). ) Is started (S3), and a precharge start signal is transmitted from the communication unit 24 (S5). The precharge is a process for determining whether or not the power transmission efficiency is in a normal range before starting the power supply. At this time, a voltage value (predetermined voltage value) applied by the current supply unit 26 to the power transmission coil 27 is determined. ) Is set lower than the voltage value when power is supplied. Here, although it is set lower than the voltage value at the time of supplying power, it can also be set to be higher than the voltage value at the time of supplying power.

After transmitting the start signal and the voltage threshold (S29), the control unit 40 waits while determining whether the communication unit 41 has received the precharge start signal (S31). When received, the voltage detector 29 is made to detect the voltage value of the predetermined position in the receiving coil 47 and the power converter 46 (S33).
Next, the control unit 40 causes the communication unit 41 to transmit the detected voltage value (S33) (S35). The voltage threshold (normal range) (S29) may be transmitted when the voltage value is transmitted (S35).

After transmitting the precharge start signal (S5), the control unit 22 waits while determining whether the communication unit 24 has received the voltage value detected by the voltage detector 29 (S7). When the voltage value is received, it is determined whether or not the voltage value is smaller than the received voltage threshold value (S1) (S9).
If the determination result (S9) is smaller than the voltage threshold (outside the normal range) (S11), the control unit 22 notifies the notification unit 21 that the power transmission efficiency is low (S13), and then the communication unit 24 The system waits while determining whether or not the voltage value detected by the voltage detector 29 has been received (S7). In addition, let the alerting | reporting part 21 alert | report that power transmission efficiency is low, and it is also possible to display on the display part 43 via the communication parts 24 and 41. FIG.

As a result of the determination, if the control unit 22 is not smaller than the voltage threshold value (within the normal range) (S11), the control unit 22 transmits a power supply start signal from the communication unit 24 (S15), and then causes the current supply unit 26 to transmit the power transmission coil 27. Is started (S17).
After transmitting the voltage value (S35), the control unit 40 waits while determining whether or not the communication unit 41 has received a power supply start signal (S37). The detector 30 is made to detect the terminal voltage value of the battery 5 (S39).

The control unit 40 determines whether or not the battery 5 is fully charged based on the detected terminal voltage value (S39) of the battery 5 (S41). If the battery 5 is not fully charged, the voltage detector is again detected. 30 is made to detect the terminal voltage value of the battery 5 (S39).
The control unit 40 waits for a predetermined time, and when the communication unit 41 does not receive the power supply start signal (S37), the voltage detector 29 is again connected to the predetermined position in the power receiving coil 47 and the power conversion unit 46. The voltage value is detected (S33).

When the battery 5 is fully charged (S41), the control unit 40 transmits a stop signal from the communication unit 41 (S43), and then waits while determining whether the reception unit 42 has received a start instruction. (S23).
After starting the power supply (S17), the control unit 22 waits while determining whether or not the communication unit 24 has received the stop signal (S19). When the control unit 22 receives the stop signal, the current supply unit 26 The power supply to the power transmission coil 27 is stopped (S21).

Next, the control unit 22 waits while determining whether or not the communication unit 24 has received the start signal and the voltage threshold (S1).
In the first embodiment, voltage values at predetermined positions in the power receiving coil 47 and the power conversion unit 46 are detected, and it is determined whether or not the power transmission efficiency is in a normal range based on the detected voltage value and voltage threshold. However, the current value flowing through a predetermined position in the power receiving coil 47 and the power converter 46 may be detected, and the power transmission efficiency may be determined based on the detected current value and the current threshold value.

(Embodiment 2)
5 and 6 are flowcharts showing an example of the operation of the non-contact power feeding system according to the second embodiment of the non-contact power feeding system, the non-contact power feeding device, the non-contact power receiving device, and the non-contact power feeding method according to the present invention. The configuration of the non-contact power feeding system according to the second embodiment is the same as the configuration of the non-contact power feeding system described with reference to FIGS. In the second embodiment, the voltage detector 29 may not be provided.
The control unit 40 is on standby while determining whether or not the reception unit 42 has received a start instruction (S71). When the reception unit 42 has received a start instruction, the voltage detector 30 is connected to the terminal voltage of the battery 5. A value is detected (S73).

  The control unit 40 determines a voltage threshold value (predetermined value) for determining whether or not the power transmission efficiency is within a normal range based on the terminal voltage value (S73) of the battery 5 detected by the voltage detector 30. (S75). The voltage threshold defines a normal range of the detection voltage value of the voltage detector 28 corresponding to the normal range of power transmission efficiency, and this normal range is smaller than the voltage threshold. The voltage detector 28 detects a voltage value at a predetermined position in the power transmission coil 27 and the current supply unit 26 (for example, a voltage value across the capacitor, a voltage value across the coil, etc.).

Next, the control unit 40 causes the communication unit 41 to transmit a start signal and the determined voltage threshold (normal range) (S77).
In the flowchart, the above-described operation related to the authentication information, the timing operation for the standby time, and the like are omitted.

  The control unit 22 waits while determining whether or not the communication unit 24 has received the start signal and the voltage threshold (S51). When the control unit 22 receives the start signal, the control unit 22 precharges the standby current supply 26 (reserve power supply). ) Is started (S53). The precharge is a process for determining whether or not the power transmission efficiency is in a normal range before starting the power supply. At this time, a voltage value (predetermined voltage value) applied by the current supply unit 26 to the power transmission coil 27 is determined. ) Is set lower than the voltage value when power is supplied. Here, although it is set lower than the voltage value at the time of supplying power, it can also be set to be higher than the voltage value at the time of supplying power.

The control unit 22 causes the current supply unit 26 to start precharging (S53), and then causes the voltage detector 28 to detect voltage values at predetermined positions in the power transmission coil 27 and the current supply unit 26 (S55).
Next, the control unit 22 determines whether or not the detected voltage value (S55) is larger than the received voltage threshold value (S51) (S57).

  If the determination result (S57) is greater than the voltage threshold (outside the normal range) (S59), the control unit 22 informs the notification unit 21 that the power transmission efficiency is low (S61), and then causes the voltage detector 28 to Voltage values at predetermined positions in the power transmission coil 27 and the current supply unit 26 are detected (S55). In addition, let the alerting | reporting part 21 alert | report that power transmission efficiency is low, and also it can display on the display part 43 via the communication parts 24 and 41. FIG.

If the result of the determination is that it is not greater than the voltage threshold (within the normal range) (S59), the control unit 22 causes the communication unit 24 to transmit a power supply start signal (S63), and then causes the current supply unit 26 to transmit the power transmission coil 27. Is started (S65).
After transmitting the start signal and the voltage threshold value (normal range) (S77), the control unit 40 waits while determining whether or not the communication unit 41 has received the power supply start signal (S79). When the signal is received, the voltage detector 30 is made to detect the terminal voltage value of the battery 5 (S81).

The control unit 40 determines whether or not the battery 5 is fully charged based on the detected terminal voltage value (S81) of the battery 5 (S83). If the battery 5 is not fully charged, the voltage detector is again detected. 30 is made to detect the terminal voltage value of the battery 5 (S81).
When the battery 5 is fully charged (S83), the control unit 40 transmits a stop signal from the communication unit 41 (S85), and then waits while determining whether the reception unit 42 has received a start instruction. (S71).
After starting power supply (S65), the control unit 22 waits while determining whether the communication unit 24 has received a stop signal (S67). When the control unit 22 receives the stop signal, the current supply unit 26 The power supply to the power transmission coil 27 is stopped (S69).

Next, the control unit 22 waits while determining whether or not the communication unit 24 has received the start signal and the voltage threshold (S51).
In the second embodiment, voltage values at predetermined positions in the power transmission coil 27 and the current supply unit 26 are detected, and it is determined whether the power transmission efficiency is in a normal range based on the detected voltage value and voltage threshold. However, the current value flowing through a predetermined position in the power transmission coil 27 and the current supply unit 26 may be detected, and the power transmission efficiency may be determined based on the detected current value and the current threshold value.

1 Non-contact power supply system 2 Power supply device (Non-contact power supply device)
3 Commercial power supply 4 Power receiving device (non-contact power receiving device)
5 Battery 21 Notifying Unit (Means for Notifying)
22 Control unit (determination means)
26 Current supply unit (power supply circuit, standby power supply means)
27 Power transmission coil (primary coil)
28, 29 Voltage detector (means for detecting a voltage value at a predetermined position)
30 Voltage detector (means for detecting terminal voltage value)
40 Control unit (threshold means)
46 Power converter (power receiving circuit)
47 Receiving coil (secondary coil)
24, 41 Communication unit (means to accept)
100 vehicles

Claims (15)

A secondary coil mounted on the vehicle; a power receiving circuit that rectifies the electric power received by the secondary coil and charges the battery; a primary coil disposed in a parking and stopping area where the vehicle is parked and stopped; and A power supply circuit that converts supplied power into a predetermined frequency and a preliminary voltage from the primary coil to the secondary coil at a predetermined voltage value before starting power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil. A non-contact power supply system comprising a reserve power supply means for supplying power to
When the standby power supply means is supplying power, a means for detecting a voltage value or a current value at a predetermined position in the secondary coil and the power receiving circuit, and a voltage value or a current value detected by the means are: A non-contact power feeding system comprising: a determination unit that determines whether or not the value is smaller than a predetermined value, and configured to start the power supply when the determination unit determines NO.   The non-contact power feeding system according to claim 1, further comprising means for notifying when the determination unit determines that the determination unit is smaller than a predetermined value. A secondary coil mounted on the vehicle; a power receiving circuit that rectifies the power received by the secondary coil and charges the battery; a primary coil disposed in a parking and stopping area where the vehicle is parked and parked; and A power supply circuit that converts supplied power into a predetermined frequency and a preliminary voltage from the primary coil to the secondary coil at a predetermined voltage value before starting power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil. A non-contact power supply system comprising a reserve power supply means for supplying power to
A means for detecting a voltage value or a current value at a predetermined position in the primary coil and the power feeding circuit and a voltage value or a current value detected by the means when the standby power supply means is supplying power; A non-contact power feeding system comprising: a determination unit configured to determine whether or not the value is greater than the value, and configured to start the power supply when the determination unit determines NO.   The non-contact power feeding system according to claim 3, further comprising means for notifying when the determination unit determines that the determination unit is larger than a predetermined value.   The non-contact power feeding system according to any one of claims 1 to 4, wherein the predetermined voltage value is lower than a voltage value generated when the power is supplied.   Before the reserve power supply means supplies power, the battery further comprises means for detecting a terminal voltage value of the battery, and the predetermined value is determined according to the terminal voltage value detected by the means. The non-contact electric power feeding system according to any one of claims 1 to 5. A coil disposed in a parking area where a vehicle is parked and stopped, a power supply circuit that converts electric power supplied to the coil into a predetermined frequency, and a predetermined voltage before starting power supply from the coil by electromagnetic induction or magnetic resonance A non-contact power feeding device comprising a reserve power supply means for preliminarily supplying power from the coil by a value,
When the reserve power supply means supplies power, the means for receiving a voltage value or a current value from the vehicle side, and determining whether the voltage value or current value received by the means is smaller than a predetermined value A non-contact power feeding device configured to start the power supply when the determination unit determines NO.   The non-contact power feeding apparatus according to claim 7, further comprising means for notifying when the determination unit determines that the determination unit is smaller than a predetermined value. A coil disposed in a parking area where a vehicle is parked and stopped, a power supply circuit that converts electric power supplied to the coil into a predetermined frequency, and a predetermined voltage before starting power supply from the coil by electromagnetic induction or magnetic resonance A non-contact power feeding device comprising a reserve power supply means for preliminarily supplying power from the coil by a value,
A means for detecting a voltage value or a current value at a predetermined position in the coil and the power supply circuit when the standby power supply means is supplying power; and a voltage value or a current value detected by the means is a predetermined value. A non-contact power feeding apparatus comprising: a determination unit configured to determine whether or not the power supply is larger than the power supply, and configured to start the power supply when the determination unit determines that the determination is negative.   The non-contact power feeding apparatus according to claim 9, further comprising a notification unit when the determination unit determines that the determination unit is greater than a predetermined value.   The contactless power supply device according to claim 7, wherein the predetermined voltage value is lower than a voltage value generated when the power is supplied.   The apparatus further includes means for receiving a voltage value from the vehicle before the standby power supply means supplies power, and the predetermined value is determined according to the voltage value received by the means. Item 12. The non-contact power feeding device according to any one of Items 7 to 11. A coil mounted on the vehicle, and a power receiving circuit that rectifies the power received by the coil and charges the battery, and before the power supply by electromagnetic induction or magnetic resonance to the coil is started, to the coil A non-contact power receiving device configured to receive a preliminary power supply of
Means for detecting a terminal voltage value of the battery before receiving the preliminary power supply, threshold means for determining a voltage or current threshold according to the terminal voltage value detected by the means, and the preliminary power Means for detecting a voltage value or a current value at a predetermined position in the coil and the power receiving circuit, a voltage value or a current value detected by the means, and a threshold value determined by the threshold means when receiving the supply; A non-contact power receiving apparatus comprising: means for transmitting to the terminal. A secondary coil mounted on the vehicle; a power receiving circuit that rectifies the power received by the secondary coil and charges the battery; a primary coil disposed in a parking and stopping area where the vehicle is parked and parked; and A power supply circuit for converting the power to be supplied to a predetermined frequency, and before starting the power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil, the primary coil to the secondary coil at a predetermined voltage value. A non-contact power supply method of a non-contact power supply system for supplying power preliminarily,
Whether the voltage value or current value at a predetermined position in the secondary coil and the power receiving circuit is detected during the preliminary power supply, and whether the detected voltage value or current value is smaller than a predetermined value. The non-contact power feeding method is characterized in that the power supply is started when it is determined as NO. A secondary coil mounted on the vehicle; a power receiving circuit that rectifies the power received by the secondary coil and charges the battery; a primary coil disposed in a parking and stopping area where the vehicle is parked and parked; and A power supply circuit for converting the power to be supplied to a predetermined frequency, and before starting the power supply by electromagnetic induction or magnetic resonance from the primary coil to the secondary coil, the primary coil to the secondary coil at a predetermined voltage value. A non-contact power supply method of a non-contact power supply system for supplying power preliminarily,
When the preliminary power is supplied, a voltage value or a current value at a predetermined position in the primary coil and the power feeding circuit is detected, and whether or not the detected voltage value or current value is larger than a predetermined value. A non-contact power feeding method characterized in that when the determination is made and the determination is NO, the power supply is started.

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