JP2012100495A - Electric power transmitting device and charging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power transmitting device and a charging system capable of excellently transmitting electric power supplied from a power supply side device to a charging target device with a simple configuration despite the difference in voltage level between the power supply side device and the charging target device.SOLUTION: An electric power transmitting device 101 transmits electric power supplied from a power supply side device 151 to a charging target device 152 which is capable of supplying AC voltage received from a charging connector 21 to a storage battery 26 after converting it to DC voltage. The electric power transmitting device 101 comprises: an input connector 12 to receive DC voltage form the power supply side device 151; an output connector 13 capable of fitted to the charging connector 21 at the charging target device 152; and a voltage adjustment circuit 11 for adjusting the level of DC voltage received through the input connector 12 and outputting the adjusted DC voltage to the output connector 13.

Description

  The present invention relates to a power transmission device and a charging system, and more particularly, to a power transmission device and a charging system that transmit power supplied from a power supply side device to a charging target device.

  The market for electric vehicles (EVs) is expanding, and in 2030, the total number of vehicles is expected to increase from 5% to 10%.

  A power transmission device for charging such a main battery for driving the EV has been developed. For example, in “Quick Charger for Electric Vehicles”, Takadake Review_Vol.54_No.1_2009, Hiroomi Togoshi, written by Akihiro Nakano, pp.2-7, 2009 (Non-Patent Document 1), AC200V is DC50-500V A quick charger is disclosed which is converted into a battery and supplied to an electric vehicle.

  JP-A-4-334907 (Patent Document 1) discloses the following configuration. That is, a gasoline engine vehicle battery is connected to the connector of the electric vehicle for charging. In this case, the electric power from the battery is boosted to a voltage corresponding to the electric vehicle by the DC-DC converter, and then supplied to the battery via the changeover switch. Thereby, the battery is charged.

"Quick Charger for Electric Vehicle", Takadake Review_Vol.54_No.1_2009, Hiroomi Banetsu, Akihiro Nakano, pp.2-7, 2009

JP-A-4-334907

  By the way, the cruising range of the EV is short and is substantially at a level of 100 km. In addition, the infrastructure for charging EVs is not expected to be as popular as gas stations. For this reason, as EV spreads, it is predicted that there will be an increase in electric shortage in suburbs and mountain roads, that is, EV battery exhaustion. And in order to cope with this electric shortage, the apparatus which can charge EV outdoors at the time of an electric shortage is calculated | required.

  As such an apparatus, it is conceivable that EVs can be connected with a cable, such as an engine car, so that electric power can be transferred. However, since the voltage level of the EV battery varies from manufacturer to manufacturer, the voltage level of the power feeding side EV may be lower or higher than the voltage level of the charging target EV. The voltage difference of EV tends to increase. For this reason, it is difficult to simply deliver power by connecting EVs with cables.

  However, Non-Patent Document 1 and Patent Document 1 do not disclose a configuration for solving such a problem.

  The present invention has been made to solve the above-described problems, and its purpose is to charge the power supplied from the power supply side device regardless of the difference between the voltage level of the power supply side device and the voltage level of the charge target device. An object of the present invention is to provide a power transmission device and a charging system that can be successfully transmitted to a target device with a simple configuration.

  In order to solve the above-described problem, a power transmission device according to an aspect of the present invention provides a charging target device capable of converting an alternating voltage received at a charging connector into a direct current voltage and supplying the direct current to a storage battery. An electric power transmission device for transmitting electric power supplied from the device, an input connector for receiving a DC voltage from the power supply side device, and an output connector that can be fitted to the charging connector in the charging target device And a voltage adjustment circuit for adjusting the level of the DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector.

  Thus, by providing the voltage adjustment circuit, it is possible to mount a voltage adjustment function. With this voltage adjustment circuit, it is possible to perform voltage adjustment by stepping up or down the DC voltage from the power supply side device. Therefore, regardless of the difference between the voltage level of the power feeding side device and the voltage level of the charging target device, the power supplied from the power feeding side device can be satisfactorily transmitted to the charging target device with a simple configuration.

  For example, power is transferred by connecting the quick charging port of the power feeding side EV and the normal power receiving port of the charging target EV. A voltage adjustment circuit such as a step-down circuit is built in, and the voltage is adjusted so as to be within a specific voltage range. With such a configuration, it is possible to perform charging using a normal in-vehicle charger as it is, and it is possible to perform a smooth charging operation without specially changing the power feeding side EV and the charging target EV. In other words, it is possible to take measures against the electric shortage of the EV while unnecessary or minimizing the modification of the power feeding side EV.

  Preferably, the power transmission device further includes a control unit for outputting, to the power feeding side device, a control signal for causing the power feeding side device to start power supply to the power feeding device.

  With such a configuration, not only when the power supply side device is charged by power supplied from the outside, but also when power is supplied to other devices, the power transmission device acquires the power stored in the power supply side device. It becomes possible to do.

  Preferably, the power transmission device further includes a control unit for outputting, to the charging target device, a control signal for causing the charging target device to start charging with power from its own power transmission device.

  With such a configuration, it is possible to notify the charging target device that power is supplied from the outside, and to start the charging operation for the storage battery.

  Preferably, the power transmission device further includes a control unit for outputting supply voltage information indicating that a direct-current voltage is supplied from the power transmission device of the power transmission device to the device to be charged.

  Thus, by notifying the type of power supplied to the charging target device, it is possible to prevent erroneous detection and malfunction of the charging target device.

  Preferably, the power transmission device further includes an input voltage level acquisition unit for acquiring a level of a DC voltage supplied from the power supply side device, and a direct current supplied from the own power transmission device to the charging target device. Based on the output voltage level acquisition unit for acquiring the voltage level, the level of the DC voltage acquired by the input voltage level acquisition unit, and the level of the DC voltage acquired by the output voltage level acquisition unit And a control unit for adjusting the level of the DC voltage received through the input connector by controlling the voltage adjusting circuit.

  With such a configuration, it is possible to appropriately control the level of the DC voltage supplied to the charging target device.

  Preferably, the power transmission device further acquires power supply side information indicating a state of a storage battery in the power supply side device, and based on the acquired power supply side information, from the power transmission device of itself to the charge target device. A control unit for performing control to stop power transmission is provided.

  With such a configuration, for example, it is possible to prevent the charge amount of the storage battery in the power supply side device from being excessively reduced.

  Preferably, the power transmission device further acquires charging target information indicating a state of a storage battery in the charging target device, and based on the acquired charging target information, the power transmission device from the own power transmission device to the charging target device. A control unit for performing control to stop power transmission is provided.

  With such a configuration, for example, overcharging of the storage battery in the charging target device can be prevented.

  Preferably, the power transmission device further acquires the amount of power supplied to the charging target device from its own power transmission device, and when the acquired amount of power reaches a predetermined value, A control unit is provided for performing control to stop power transmission from the device to the charging target device.

  With such a configuration, it is possible to appropriately control the amount of power supplied from the own power transmission device to the charging target device.

  Preferably, the power transmission device further includes a presentation unit for presenting a user with a power supply status from the power transmission device of the power transmission device to the charging target device.

  With such a configuration, the charging status can be presented to the user, and the convenience for the user can be improved.

  Preferably, the voltage adjustment circuit is integrated with at least one of the input connector and the output connector.

  With such a configuration, a cable between the connector and the voltage adjustment circuit is not necessary, and the cost can be reduced.

  Preferably, the voltage adjustment circuit includes a chopper circuit.

  With such a configuration, large power can be supplied to the charging target device. In general, in-vehicle chargers employ an insulating circuit in a circuit that converts a supplied AC voltage into a DC voltage. In such a case, since it is less necessary to provide an insulating circuit in the power transmission device, a voltage adjustment circuit using a step-down chopper method is preferable to a voltage adjustment circuit using a transformer method. As a result, the number of parts of the voltage adjustment circuit can be reduced.

  Preferably, the voltage adjustment circuit includes a transformer circuit.

  With such a configuration, large power can be supplied to the charging target device. In addition, compared to the configuration using a chopper circuit, the power feeding side device and the charging target device can be electrically insulated, so that the charging operation is not limited by the presence or absence of an insulating circuit in the power feeding side device and the charging target device. Can be performed.

  More preferably, the voltage adjustment circuit includes a switch, and adjusts the level of the DC voltage by switching the input voltage with the switch, and the switching frequency of the switch is 10 kHz to 50 kHz, and the voltage adjustment The circuit further includes a winding wound around a core to which the switched input voltage is applied, and the core includes any of a ferrite, an amorphous alloy, and a dust core.

  As described above, the transformer, the reactor, and the like can be miniaturized by the configuration in which the switching frequency in the voltage adjustment circuit is set to be higher than the frequency of the commercial AC power supply such as 10 kHz to 50 kHz. Furthermore, the core can reduce high-frequency loss and suppress heat generation.

  Preferably, the output connector is further engageable with the DC connector in an inverter device capable of converting a DC voltage received at the DC connector into an AC voltage and supplying the AC voltage to a load.

  With such a configuration, not only power is transmitted from a power supply side device that is, for example, an electric vehicle, to a charging target device that is, for example, an electric vehicle, but also power is transmitted from the power supply side device to, for example, an electrical device in a home via an inverter device. Can be transmitted, and more various charging environments can be provided.

  More preferably, the power transmission device further controls the voltage adjustment circuit so that the inverter device converts the level of the DC voltage received through the input connector into an AC voltage. A control unit is provided for adjusting to a possible predetermined level.

  With such a configuration, an AC voltage conversion operation can be stably performed in the inverter device.

  More preferably, the control unit acquires information indicating the predetermined level from the inverter device, and controls the voltage adjustment circuit based on the acquired information, thereby allowing the DC voltage received via the input connector. Is adjusted to the predetermined level.

  With such a configuration, an appropriate level of DC voltage can be transmitted to the inverter device in response to notification of the desired voltage from the inverter device.

  More preferably, the control unit adjusts the level of the DC voltage received through the input connector to the predetermined level by controlling the voltage adjustment circuit based on a user operation.

  Thus, the convenience of the user can be enhanced by the configuration in which the power adjustment is performed according to the user's operation.

  Preferably, the power feeding side device and the charging target device are electric vehicles.

  With such a configuration, it is possible to satisfactorily perform charging between electric vehicles, which are difficult to transfer power by simply connecting with a cable, with a simple configuration.

  In order to solve the above-described problem, a charging system according to an aspect of the present invention includes a charging target device, and a power transmission device for supplying power supplied from a power supply side device to the charging target device. The charging target device includes a storage battery, a charging connector, and a power conversion circuit for converting the AC voltage received at the charging connector into a DC voltage and supplying the DC voltage to the storage battery. An input connector for receiving a DC voltage from the power supply side device, an output connector that can be fitted with the charging connector in the charging target device, and a level of the DC voltage received through the input connector were adjusted and adjusted. A voltage adjusting circuit for outputting a DC voltage to the output connector, and a supply power indicating that the DC voltage is supplied from the power transmission device to the charging target device. A control unit for outputting information to the charging target device, and the charging target device further includes a monitoring unit for monitoring a voltage supplied to the charging connector. When the supply voltage information is received from the power transmission device, the monitoring is performed assuming that the voltage supplied to the charging connector is a DC voltage.

  Thus, by notifying the type of power supplied to the charging target device, it is possible to prevent erroneous detection and malfunction of the charging target device.

  A charging system according to another aspect of the present invention includes a charging target device and a power transmission device for supplying the power supplied from the power supply side device to the charging target device, and the charging target device includes a storage battery. And a charging connector, and a power conversion circuit for converting the AC voltage received at the charging connector into a DC voltage and supplying the same to the storage battery, wherein the power transmission device receives the DC voltage from the power supply side device. An input connector for receiving the power, an output connector that can be fitted to the charging connector in the device to be charged, a level of the DC voltage received through the input connector, and adjusting the adjusted DC voltage to the output connector A voltage adjusting circuit for outputting to the charging target device, wherein the charging target device further includes a DC voltage or an AC voltage received at the charging connector. A voltage determining unit for determining whether or not there is a monitoring unit for monitoring the voltage supplied to the charging connector, the monitoring unit based on the determination result by the voltage determining unit The above monitoring is performed by recognizing that the voltage supplied to the connector is a DC voltage or an AC voltage.

  Thus, by determining the type of power supplied to the charging target device, it is possible to prevent erroneous detection and malfunction of the abnormality in the charging target device.

  In addition, a charging system according to another aspect of the present invention includes a charging target device, an inverter device capable of converting a DC voltage into an AC voltage and supplying the same to a load, and charging the power supplied from a power supply side device. A power transmission device for supplying to the target device and the inverter device, the charging target device includes a charging connector, and the power transmission device includes an input connector for receiving a DC voltage from the power feeding side device; A voltage adjustment for adjusting the level of the DC voltage received through the input connector and the output connector that can be fitted to the charging connector in the device to be charged, and outputting the adjusted DC voltage to the output connector A circuit, wherein the inverter device includes a DC connector for receiving a DC voltage from the power supply side device, and the output connector further includes: The inverter device can be fitted to the DC connector, and the inverter device further includes a monitoring unit for monitoring a voltage supplied to the DC connector, and a monitoring result of the monitoring unit based on a monitoring result of the monitoring unit. And a control unit for performing control to stop the conversion operation to AC voltage by the inverter device.

  With such a configuration, it is possible to prevent malfunction of the inverter device when an inappropriate voltage is applied.

  Preferably, when the control unit performs control to stop the conversion operation to the AC voltage, the inverter device further provides information indicating that the inverter device cannot perform the conversion operation to the AC voltage by the user. A presentation unit is provided for presenting.

  With such a configuration, it is possible to appropriately notify the user of the abnormality, and thus the convenience for the user can be improved.

  Preferably, the inverter device further includes a current level acquisition unit for acquiring an amount of current supplied from the inverter device of the inverter to the load, and the control unit is further acquired by the current level acquisition unit. Control for stopping the supply of the AC voltage to the load is performed based on the current amount.

  With such a configuration, it is possible to prevent an excessive current from being supplied from the inverter device to the load.

  More preferably, after performing the control to stop the supply of the AC voltage, the control unit continues to stop the supply of the AC voltage until receiving an instruction from the user to restart the supply of the AC voltage.

  With such a configuration, for example, after the user inspects each device, the AC voltage supply operation by the inverter device can be resumed.

  Preferably, the control unit further acquires the amount of power supplied from the inverter device of the control unit to the load, and when the acquired amount of power reaches a predetermined value, the AC voltage to the load. Control to stop the supply of.

  With such a configuration, it is possible to appropriately control the amount of power supplied from its own inverter device to the load.

  A power transmission device according to another aspect of the present invention is a power for transmitting power supplied from a power supply side device to a charging target device capable of supplying a direct current voltage received at a charging connector to a storage battery. An input connector for receiving a DC voltage from the power supply side device, an output connector that can be fitted to the charging connector in the device to be charged, while insulating between the input side and the output side, A voltage adjusting circuit for adjusting a level of the DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector.

  Thus, by providing the voltage adjustment circuit, it is possible to mount a voltage adjustment function. With this voltage adjustment circuit, it is possible to perform voltage adjustment by stepping up or down the DC voltage from the power supply side device. Therefore, regardless of the difference between the voltage level of the power feeding side device and the voltage level of the charging target device, the power supplied from the power feeding side device can be satisfactorily transmitted to the charging target device with a simple configuration.

  For example, power is transferred by connecting the quick charging port of the power feeding side EV and the normal power receiving port of the charging target EV. A voltage adjustment circuit such as a step-down circuit is built in, and the voltage is adjusted so as to be within a specific voltage range. With such a configuration, it is possible to perform charging using a normal in-vehicle charger as it is, and it is possible to perform a smooth charging operation without specially changing the power feeding side EV and the charging target EV. In other words, it is possible to take measures against the electric shortage of the EV while unnecessary or minimizing the modification of the power feeding side EV.

  Preferably, the power transmission device further includes a control unit for outputting, to the power feeding side device, a control signal for causing the power feeding side device to start power supply to the power feeding device.

  With such a configuration, not only when the power supply side device is charged by power supplied from the outside, but also when power is supplied to other devices, the power transmission device acquires the power stored in the power supply side device. It becomes possible to do.

  Preferably, the power transmission device further includes a control unit for outputting, to the charging target device, a control signal for causing the charging target device to start charging with power from its own power transmission device.

  With such a configuration, it is possible to notify the charging target device that power is supplied from the outside, and to start the charging operation for the storage battery.

  Preferably, the power transmission device further includes an input voltage level acquisition unit for acquiring a level of a DC voltage supplied from the power supply side device, and a direct current supplied from the own power transmission device to the charging target device. Based on the output voltage level acquisition unit for acquiring the voltage level, the level of the DC voltage acquired by the input voltage level acquisition unit, and the level of the DC voltage acquired by the output voltage level acquisition unit And a control unit for adjusting the level of the DC voltage received through the input connector by controlling the voltage adjusting circuit.

  With such a configuration, it is possible to appropriately control the level of the DC voltage supplied to the charging target device.

  Preferably, the power transmission device further acquires power supply side information indicating a state of a storage battery in the power supply side device, and based on the acquired power supply side information, from the power transmission device of itself to the charge target device. A control unit for performing control to stop power transmission is provided.

  With such a configuration, for example, it is possible to prevent the charge amount of the storage battery in the power supply side device from being excessively reduced.

  Preferably, the power transmission device further acquires charging target information indicating a state of a storage battery in the charging target device, and based on the acquired charging target information, the power transmission device from the own power transmission device to the charging target device. A control unit for performing control to stop power transmission is provided.

  With such a configuration, for example, overcharging of the storage battery in the charging target device can be prevented.

  Preferably, the power transmission device further acquires the amount of power supplied to the charging target device from its own power transmission device, and when the acquired amount of power reaches a predetermined value, A control unit is provided for performing control to stop power transmission from the device to the charging target device.

  With such a configuration, it is possible to appropriately control the amount of power supplied from the own power transmission device to the charging target device.

  Preferably, the power transmission device further includes a presentation unit for presenting a user with a power supply status from the power transmission device of the power transmission device to the charging target device.

  With such a configuration, the charging status can be presented to the user, and the convenience for the user can be improved.

  Preferably, the voltage adjustment circuit is integrated with at least one of the input connector and the output connector.

  With such a configuration, a cable between the connector and the voltage adjustment circuit is not necessary, and the cost can be reduced.

  Preferably, the voltage adjustment circuit includes a transformer circuit.

  With such a configuration, large power can be supplied to the charging target device. In addition, compared to the configuration using a chopper circuit, the power feeding side device and the charging target device can be electrically insulated, so that the charging operation is not limited by the presence or absence of an insulating circuit in the power feeding side device and the charging target device. Can be performed.

  More preferably, the voltage adjustment circuit includes a switch, and adjusts the level of the DC voltage by switching the input voltage with the switch, and the switching frequency of the switch is 10 kHz to 50 kHz, and the voltage adjustment The circuit further includes a winding wound around a core to which the switched input voltage is applied, and the core includes any of a ferrite, an amorphous alloy, and a dust core.

  As described above, the transformer, the reactor, and the like can be miniaturized by the configuration in which the switching frequency in the voltage adjustment circuit is set to be higher than the frequency of the commercial AC power supply such as 10 kHz to 50 kHz. Furthermore, the core can reduce high-frequency loss and suppress heat generation.

  Preferably, the output connector is further engageable with the DC connector in an inverter device capable of converting a DC voltage received at the DC connector into an AC voltage and supplying the AC voltage to a load.

  With such a configuration, not only power is transmitted from a power supply side device that is, for example, an electric vehicle, to a charging target device that is, for example, an electric vehicle, but also power is transmitted from the power supply side device to, for example, an electrical device in a home via an inverter device. Can be transmitted, and more various charging environments can be provided.

  More preferably, the power transmission device further controls the voltage adjustment circuit so that the inverter device converts the level of the DC voltage received through the input connector into an AC voltage. A control unit is provided for adjusting to a possible predetermined level.

  With such a configuration, an AC voltage conversion operation can be stably performed in the inverter device.

  More preferably, the control unit acquires information indicating the predetermined level from the inverter device, and controls the voltage adjustment circuit based on the acquired information, thereby allowing the DC voltage received via the input connector. Is adjusted to the predetermined level.

  With such a configuration, an appropriate level of DC voltage can be transmitted to the inverter device in response to notification of the desired voltage from the inverter device.

  More preferably, the control unit adjusts the level of the DC voltage received through the input connector to the predetermined level by controlling the voltage adjustment circuit based on a user operation.

  Thus, the convenience of the user can be enhanced by the configuration in which the power adjustment is performed according to the user's operation.

  Preferably, the power feeding side device and the charging target device are electric vehicles.

  With such a configuration, it is possible to satisfactorily perform charging between electric vehicles, which are difficult to transfer power by simply connecting with a cable, with a simple configuration.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power supplied from the electric power feeding side apparatus can be favorably transmitted with a simple structure irrespective of the difference in the voltage level of an electric power feeding side apparatus and the voltage level of an electric charging object apparatus.

It is a figure which shows the structure of the charging system which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the voltage adjustment circuit in the electric power transmission apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the voltage adjustment circuit in the electric power transmission apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of a structure of the voltage adjustment circuit in the electric power transmission apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the charging system which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the charging system which concerns on the 3rd Embodiment of this invention. It is a figure which shows the structure of the charging system which concerns on the 4th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Configuration and basic operation]
FIG. 1 is a diagram showing a configuration of a charging system according to the first embodiment of the present invention.

  Referring to FIG. 1, charging system 201 includes power transmission device 101, power supply device 151, and charging target device 152. The power supply side device 151 and the charging target device 152 are, for example, electric vehicles.

  The power supply side device 151 includes a storage battery 31, relays 32 and 33, and a quick charging connector 34.

  The power transmission device 101 includes a voltage adjustment circuit 11, an input connector 12, an output connector 13, an input voltage level acquisition unit 14, an output voltage level acquisition unit 15, an output current level acquisition unit 16, and a control unit 17. And a presentation unit 18.

  The charging target device 152 includes a normal charging connector 21, a storage battery 26, a sensor (voltage determination unit) 27, a monitoring unit 28, and a power conversion circuit 29. The power conversion circuit 29 includes a rectifier circuit 22, a voltage adjustment circuit 23, a rectifier circuit 24, and a capacitor 25.

  In the power supply side device 151, the storage battery 31 can be charged by supplying a DC voltage of, for example, 200 V to 300 V from the outside to the quick charging connector 34 with the relays 32 and 33 turned on. The voltage level of the storage battery 31 is, for example, 300V to 400V.

  The charging target device 152 can convert the AC voltage received at the normal charging connector 21 into a DC voltage and supply it to the storage battery 26. Specifically, in the charging target device 152, the storage battery 26 can be charged by supplying an AC voltage of, for example, 100 V to 200 V to the normal charging connector 21 from the outside. The voltage level of the storage battery 26 is, for example, 300V to 400V.

  More specifically, the power conversion circuit 29 converts the AC voltage received at the normal charging connector 21 into a DC voltage and supplies it to the storage battery 26.

  In the power conversion circuit 29, the rectifier circuit 22 performs full-wave rectification on the AC voltage supplied to the normal charging connector 21.

  The voltage adjustment circuit 23 includes, for example, a capacitor, a coil, four switch elements, and a transformer. By switching the alternating voltage that has been full-wave rectified by the rectifier circuit 22 using the switch element, the voltage adjustment circuit 23 is supplied to the primary winding of the transformer. An AC voltage is induced in the secondary winding of the transformer. The voltage adjustment circuit 23 also adjusts the voltage level by switching the switch element.

  The rectifier circuit 24 performs full-wave rectification on the AC voltage induced in the voltage adjustment circuit 23. The capacitor 25 smoothes the AC voltage that has been full-wave rectified by the rectifier circuit 24. The smoothed voltage is supplied to the storage battery 26, whereby the storage battery 26 is charged.

  The sensor 27 measures the voltage supplied to the normal charging connector 21. The monitoring unit 28 monitors the voltage supplied to the normal charging connector 21 based on the measurement result of the sensor 27, and outputs abnormality information when determining that the supply voltage is abnormal.

  The power transmission device 101 transmits the power supplied from the power supply side device 151 to the charging target device 152. Specifically, for example, power of 1 kW to 3 kW is supplied from the power supply side device 151 to the charging target device 152 via the power transmission device 101.

  More specifically, in the power transmission device 101, the input connector 12 can be fitted to the quick charging connector 34 in the power supply side device 151 and receives a DC voltage from the power supply side device 151.

  The output connector 13 can be fitted to the normal charging connector 21 in the charging target device 152.

  The voltage adjustment circuit 11 adjusts the level of the DC voltage received via the input connector 12 and outputs the adjusted DC voltage to the output connector 13.

  The input voltage level acquisition unit 14 measures and acquires the level of the DC voltage supplied from the power supply side device 151.

  The output voltage level acquisition unit 15 measures and acquires the level of the DC voltage supplied from its own power transfer device 101 to the charging target device 152.

  The output current level acquisition unit 16 measures and acquires the level of the direct current supplied from its own power transfer device 101 to the charging target device 152.

  The control unit 17 communicates with the power supply side device 151 and the charging target device 152 using communication means such as CAN (Controller Area Network), PLC (Power Line Communications), and wireless communication.

  The presentation unit 18 presents the user with the status of power supply from his / her power transmission apparatus 101 to the charging target apparatus 152. Specifically, the user can grasp the state of charge during charging and the end of charging by sounds such as lamps, character displays, and buzzers.

  FIG. 2 is a diagram illustrating an example of a configuration of a voltage adjustment circuit in the power transmission device according to the first embodiment of the present invention.

  Referring to FIG. 2, voltage adjustment circuit 11 includes a chopper circuit. More specifically, the voltage adjustment circuit 11 is a step-down chopper circuit that is a step-down DC / DC converter, for example, and includes a switch element S21, a reactor L21, a diode D21, and a capacitor C21.

  The DC voltage from the input connector 12 is supplied to the nodes N1 and N2, switched by the switch element S21 and supplied to the reactor L21, and the voltage discharged from the reactor L21 is smoothed by the capacitor C21 and output from the nodes N3 and N4. It is supplied to the connector 13.

  As a result, the DC voltage received via the input connector 12 is stepped down by switching of the switch element S21 and output to the output connector 13.

  In this voltage adjustment circuit 11, the level of the DC voltage supplied from the nodes N3 and N4 to the output connector 13 is controlled by controlling the ON / OFF duty ratio of the switch element S21, that is, the modulation rate, or the switching frequency of the switch element S21. Is adjusted to 100V to 200V.

  FIG. 3 is a diagram illustrating an example of a configuration of a voltage adjustment circuit in the power transmission device according to the first embodiment of the present invention.

  Referring to FIG. 3, voltage adjustment circuit 11 includes a transformer circuit. More specifically, the voltage adjustment circuit 11 is a single forward circuit including, for example, a high-frequency transformer circuit, and includes a switch element S1, a transformer T1, a reactor L1, diodes D1 and D2, and a capacitor C1.

  The DC voltage from the input connector 12 is supplied to the nodes N1 and N2, switched by the switch element S21 and supplied to the primary winding of the transformer T1, and the voltage induced in the secondary winding of the transformer T1 is the diode D1, The voltage rectified by D2 and supplied to the reactor L1, and the voltage discharged from the reactor L1 is smoothed by the capacitor C1, and supplied to the output connector 13 from the nodes N3 and N4.

  As a result, the DC voltage received via the input connector 12 is stepped up or stepped down by switching of the switch element S <b> 1 and output to the output connector 13.

  In this voltage adjustment circuit 11, the output from the nodes N3 and N4 is controlled by controlling the switching frequency of the switch element S1 or by controlling the turn ratio of the primary winding and the secondary winding of the transformer T1 by tap switching or the like. The level of the DC voltage supplied to the connector 13 is adjusted to 100V to 200V.

  FIG. 4 is a diagram illustrating an example of the configuration of the voltage adjustment circuit in the power transmission device according to the first embodiment of the present invention.

  Referring to FIG. 4, voltage adjustment circuit 11 includes a transformer circuit. More specifically, the voltage adjustment circuit 11 is a full-bridge circuit including, for example, a high-frequency transformer circuit, and includes switch elements S11, S12, S13, and S14, a transformer T11, a reactor L11, diodes D11 and D12, And capacitor C11.

  The DC voltage from the input connector 12 is supplied to the nodes N1 and N2, switched by the switch elements S11, S12, S13, and S14, supplied to the primary winding of the transformer T11, and induced to the secondary winding of the transformer T11. The voltage is rectified by the diodes D11 and D12 and supplied to the reactor L11. The voltage discharged from the reactor L11 is smoothed by the capacitor C11 and supplied to the output connector 13 from the nodes N3 and N4.

  Thereby, the DC voltage received via the input connector 12 is stepped up or stepped down by switching of the switch elements S11, S12, S13, and S14 and output to the output connector 13.

  In this voltage adjustment circuit 11, by controlling the switching frequency of the switching elements S11, S12, S13, S14, or by controlling the turns ratio of the primary winding and the secondary winding of the transformer T11 by tap switching or the like, The level of the DC voltage supplied from the nodes N3 and N4 to the output connector 13 is adjusted to 100V to 200V.

  As described above, by employing any one of the forward converter method, the full bridge method, and the step-down chopper method as the voltage adjustment circuit 11, for example, a large power of 1 kW to 3 kW can be supplied to the charging target device 152.

  In addition, the voltage adjustment circuit 11 includes a reactor that is an inductor or a transformer, that is, a winding that is wound around a core and to which a switched input voltage is applied. The core includes any one of ferrite, an amorphous alloy, and a dust core.

  Further, in the voltage adjusting circuit 11, when the level of the DC voltage is adjusted by switching the input voltage with a switch, the switching frequency of the switch is set to, for example, 10 kHz to 50 kHz.

[Operation]
Next, the operation of the charging system according to the first embodiment of the present invention will be described.

  Referring to FIG. 1 again, first, the input connector 12 of the power transmission device 101 is connected to the quick charging connector 34 of the power supply side device 151, and the power transmission device 101 is connected to the normal charging connector 21 of the charging target device 152. The output connector 13 is connected.

  Next, by turning on the relays 32 and 33 of the power supply side device 151, for example, a DC voltage of 300 V to 400 V is supplied from the storage battery 31 of the power supply side device 151 to the power transmission device 101.

  The power transmission device 101 adjusts the level of the DC voltage supplied from the power supply side device 151 to, for example, 100 V to 200 V, and supplies the adjusted DC voltage to the charging target device 152.

  The DC voltage supplied from the power transmission device 101 to the charging target device 152 is supplied to the storage battery 26 via the power conversion circuit 29. Thereby, the storage battery 26 is charged. At this time, a diode energization loss may occur in the rectifier circuit 22 and the rectifier circuit 24 of the power conversion circuit 29. However, since this charging process is an emergency, the reduction in efficiency is not a big problem.

  Further, the control unit 17 outputs a control signal C <b> 1 for causing the power supply side device 151 to start power supply to the power transmission device 101 of the power supply side device 151 to the power supply side device 151. The power supply side device 151 receives the control signal C1 and turns on the relays 32 and 33.

  The control unit 17 outputs to the charging target device 152 a control signal C2 for causing the charging target device 152 to start charging with power from the power transmission device 101 of the charging target device 152. The charging target device 152 receives the control signal C2, recognizes that electric power is supplied from the outside, and starts the charging operation to the storage battery 26.

  In the charging target device 152, the sensor 27 determines whether the voltage received at the normal charging connector 21 is a DC voltage or an AC voltage.

  Based on the determination result of the sensor 27, the monitoring unit 28 recognizes that the voltage supplied to the normal charging connector 21 is a DC voltage or an AC voltage, and monitors the supply voltage. For example, the monitoring unit 28 receives a determination result indicating that the supply voltage is a DC voltage from the sensor 27, and the voltage supplied to the normal charging connector 21 is not the AC voltage supplied during normal charging. Does not output error information.

  The control unit 17 in the power transmission device 101 may output supply voltage information indicating that a DC voltage is supplied from the power transmission device 101 to the charging target device 152 to the charging target device 152. . In this case, the monitoring unit 28 receives supply voltage information from the power transmission device 101 and monitors the supply voltage assuming that the voltage supplied to the normal charging connector 21 is a DC voltage.

  The control unit 17 controls the voltage adjustment circuit 11 based on the DC voltage level acquired by the input voltage level acquisition unit 14 and the DC voltage level acquired by the output voltage level acquisition unit 15. The level of the DC voltage received through the input connector 12 is adjusted. Specifically, the control unit 17 adjusts the level of the DC voltage output from the output connector 13 to, for example, 100 V to 200 V by controlling the modulation factor, switching frequency, and the like in the voltage adjustment circuit 11.

  In addition, the power supply side device 151 outputs power supply side information M <b> 1 indicating the state of the storage battery 31 to the power transmission device 101.

  The control unit 17 acquires power supply side information M1 from the power supply side device 151, and performs control to stop power transmission from the power transmission device 101 to the charging target device 152 based on the acquired power supply side information M1. Specifically, when the power supply side information M1 indicates that the charging rate of the storage battery 31 is, for example, less than 90%, the control unit 17 stops switching in the voltage adjustment circuit 11 or outputs a DC voltage. Control to stop power transmission from the power transmission apparatus 101 to the charging target apparatus 152 is performed by a method such as turning off a switch (not shown) for transmission to the connector 13 side.

  In addition, the charging target device 152 outputs charging target information M <b> 2 indicating the state of the storage battery 26 to the power transmission device 101.

  The control unit 17 acquires the charging target information M2 from the charging target device 152, and performs control to stop power transmission from the own power transmission device 101 to the charging target device 152 based on the acquired charging target information M2. Specifically, when charging target information M2 indicates that the charging rate of storage battery 26 has reached, for example, 90%, control unit 17 stops switching in voltage adjustment circuit 11 or outputs a DC voltage. Control to stop power transmission from the power transmission apparatus 101 to the charging target apparatus 152 is performed by a method such as turning off a switch (not shown) for transmission to the connector 13 side.

  In addition, the control unit 17 acquires the amount of power supplied from the own power transmission device 101 to the charging target device 152. More specifically, the control unit 17 calculates the electric energy based on the DC current level acquired by the output current level acquisition unit 16 and the DC voltage level acquired by the output voltage level acquisition unit 15. And the control part 17 performs control which stops the electric power transmission from the own electric power transmission apparatus 101 to the charging object apparatus 152, when the said electric energy reaches a predetermined value.

  By the way, when charging EV outdoors when there is a shortage of electricity, it is conceivable that EVs can be connected by a cable, such as an engine car, so that power can be delivered. However, since the voltage level of the EV battery varies from manufacturer to manufacturer, the voltage level of the power feeding side EV may be lower or higher than the voltage level of the charging target EV. The voltage difference of EV tends to increase. For this reason, it is difficult to simply deliver power by connecting EVs with cables.

  Specifically, when the power supply side device 151 and the charging target device 152 are EVs, these two EVs have different storage battery voltage levels when the vehicle types are different, so that the storage battery voltage levels are also different. Moreover, even if the vehicle type is the same, the electromotive voltage of the storage battery varies depending on the state of charge of the storage battery.

  In addition, the voltage adjustment function is already installed in the in-vehicle charger in the EV, and it is conceivable to use the voltage adjustment function of the in-vehicle charger. However, since the in-vehicle charger usually corresponds to a voltage level of about 100 V to 230 V, a direct current voltage of, for example, 300 V to 400 V from the power feeding side EV that is the power feeding side device 151 is supplied to the charging target device 152 as it is. It is difficult.

  On the other hand, in the power transmission device according to the first embodiment of the present invention, the output connector 13 that can be fitted to the normal charging connector 21 in the charging target device 152 is provided, and the voltage adjustment circuit 11 is the input connector. 12 adjusts the level of the DC voltage received from the power supply side device 151 via 12 and outputs the adjusted DC voltage to the output connector 13.

  As described above, the power transmission device according to the first embodiment of the present invention can be equipped with the voltage adjustment function by providing the voltage adjustment circuit 11. The voltage adjustment circuit 11 can increase or decrease the direct current voltage from the power feeding side EV to adjust the voltage.

  Therefore, in the power transmission device according to the first embodiment of the present invention, the power supplied from the power supply side device is supplied to the charge target device regardless of the difference between the voltage level of the power supply side device and the voltage level of the charge target device. Good transmission can be achieved with a simple configuration.

  For example, in the power transmission device according to the first embodiment of the present invention, the rapid charging port of the power feeding side EV and the normal power receiving port of the charging target EV are connected to transfer power. A voltage adjustment circuit such as a step-down circuit is built in, and the voltage is adjusted so as to be within a specific voltage range.

  With such a configuration, it is possible to perform charging using a normal on-vehicle charger as it is, and it is possible to perform a smooth charging operation without adding any special changes to the power supply side device and the charging target device.

  That is, by using the power transmission device according to the first embodiment of the present invention, it is possible to take measures against the electric shortage of the EV while unnecessary or minimizing the modification of the power feeding side EV.

  In the power transfer device according to the first embodiment of the present invention, the control unit 17 sends a control signal for causing the power supply side device 151 to start supplying power to the power transfer device 101 of the power supply side device 151. Output to.

  With this configuration, the relays 32 and 33 can be turned on not only when the power supply side device 151 is charged with power supplied from the outside but also when power is supplied to other devices. The power stored in the side device 151 can be acquired by the power transmission device 101.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the control unit 17 sends a control signal for causing the charging target device 152 to start charging with power from the own power transmission device 101. It outputs to 152.

  With such a configuration, it is possible to notify the charging target device 152 that power is supplied from the outside, and to start the charging operation for the storage battery 26.

  In addition, since the charging target device 152 is supplied with a DC voltage instead of an AC voltage supplied during normal charging, the measurement and monitoring of the input voltage are not based on the assumption of the AC voltage. It is necessary to switch to the one that presupposes.

  Therefore, in the charging system according to the first embodiment of the present invention, the charging target device 152 communicates with the power transmission device 151 to determine whether the charging is an AC voltage or a DC voltage. Equipped with a function to distinguish. Then, the charging target device 152 performs voltage measurement and current measurement based on DC charging or AC charging.

  That is, the control unit 17 outputs supply voltage information indicating that a DC voltage is supplied from the power transmission apparatus 101 of itself to the charging target apparatus 152 to the charging target apparatus 152. When the monitoring unit 28 in the charging target device 152 receives supply voltage information from the power transmission device 101, the monitoring unit 28 monitors the supply voltage assuming that the voltage supplied to the normal charging connector 21 is a DC voltage.

  Thus, by notifying the type of power supplied to the charging target device 152, erroneous detection and malfunction of the abnormality in the charging target device 152 can be prevented.

  Or in the charging system which concerns on the 1st Embodiment of this invention, the charging object apparatus 152 carries the function which distinguishes automatically whether the supply voltage from the electric power transmission apparatus 151 is alternating current or direct current | flow. Then, the charging target device 152 performs voltage measurement and current measurement based on DC charging or AC charging.

  That is, in the charging target device 152, the sensor 27 determines whether the voltage received at the normal charging connector 21 is a DC voltage or an AC voltage. Based on the determination result of the sensor 27, the monitoring unit 28 recognizes that the voltage supplied to the normal charging connector 21 is a DC voltage or an AC voltage, and monitors the supply voltage.

  As described above, by determining the type of power supplied to the charging target device 152, it is possible to prevent erroneous detection and malfunction of the charging target device 152.

  Further, in the power transmission device according to the first embodiment of the present invention, the control unit 17 includes the DC voltage level acquired by the input voltage level acquisition unit 14 and the DC voltage acquired by the output voltage level acquisition unit 15. The level of the DC voltage received via the input connector 12 is adjusted by controlling the voltage adjustment circuit 11 based on the voltage level.

  With such a configuration, the level of the DC voltage supplied to the charging target device 152 can be appropriately controlled.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the control unit 17 acquires power supply side information indicating the state of the storage battery 31 in the power supply side device 151, and based on the acquired power supply side information, Control is performed to stop power transmission from its own power transmission device 101 to charging target device 152.

  With such a configuration, for example, it is possible to prevent the charge amount of the storage battery 31 in the power supply side device 151 from being excessively reduced.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the control unit 17 acquires charging target information indicating the state of the storage battery 26 in the charging target device 152, and based on the acquired charging target information, Control is performed to stop power transmission from its own power transmission device 101 to charging target device 152.

  With such a configuration, for example, overcharging of the storage battery 26 in the charging target device 152 can be prevented.

  Moreover, in the power transmission device according to the first embodiment of the present invention, when the charging power to the charging target device 152 reaches a predetermined constant power capacity, the power supply is automatically stopped. That is, the control unit 17 acquires the amount of power supplied from the own power transmission device 101 to the charging target device 152, and when the acquired amount of power reaches a predetermined value, the control unit 17 charges from the own power transmission device 101. Control to stop power transmission to the target device 152 is performed.

  With such a configuration, it is possible to appropriately control the amount of power supplied from its own power transmission device 101 to the charging target device 152.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the presentation unit 18 presents the user with the power supply status from the power transmission device 101 to the charging target device 152.

  With such a configuration, the charging status can be presented to the user, and the convenience for the user can be improved.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the voltage adjustment circuit 11 includes a chopper circuit.

  With such a configuration, large power can be supplied to the charging target device 152. In general, in-vehicle chargers employ an insulating circuit in a circuit that converts a supplied AC voltage into a DC voltage. In such a case, since it is less necessary to provide an insulating circuit in the power transmission device 101, the voltage shown in FIG. 2 which is a step-down chopper method is used rather than the voltage adjustment circuit which is a transformer method shown in FIGS. An adjustment circuit is preferred. As a result, the number of parts of the voltage adjustment circuit can be reduced.

  Alternatively, in the power transmission device according to the first embodiment of the present invention, voltage adjustment circuit 11 includes a transformer circuit.

  With such a configuration, large power can be supplied to the charging target device 152. Further, compared to the configuration using the chopper circuit, the power feeding side device 151 and the charging target device 152 can be electrically insulated, and thus the present invention is not limited to the presence or absence of an insulating circuit in the power feeding side device 151 and the charging target device 152. It becomes possible to perform charging work.

  In the power transmission device according to the first embodiment of the present invention, the voltage adjustment circuit 11 includes a switch, adjusts the level of the DC voltage by switching the input voltage with the switch, and switches the switch. The frequency is 10 kHz or more and 50 kHz or less. As described above, the configuration in which the switching frequency in the voltage adjustment circuit 11 is set to be higher than the frequency of the commercial AC power source, such as 10 kHz to 50 kHz, can achieve downsizing of the transformer and the reactor.

  The voltage adjustment circuit 11 further includes a winding wound around the core and to which the switched input voltage is applied, and the core includes any one of ferrite, an amorphous alloy, and a dust core. As a result, loss at high frequencies can be reduced and heat generation can be suppressed.

  Moreover, in the charging system according to the first embodiment of the present invention, the power supply side device 151 and the charging target device 152 are electric vehicles.

  With such a configuration, it is possible to satisfactorily perform charging between electric vehicles, which are difficult to transfer power by simply connecting with a cable, with a simple configuration.

  In the power transmission device according to the first embodiment of the present invention, the voltage adjustment circuit 11 is integrated with at least one of the input connector 12, that is, the quick charging side connector, and the output connector 13, that is, the normal charging side connector. It may be a structure.

  With such a configuration, a cable between the connector and the voltage adjustment circuit is not necessary, and the cost can be reduced.

  In addition, since the quick charge connector is often larger in size than the normal charge connector, it is preferable to integrate the quick charge connector with an input connector that is larger in size than the output connector.

  Moreover, in the power transmission device according to the first embodiment of the present invention, the input voltage level acquisition unit 14, the output voltage level acquisition unit 15, and the output current level acquisition unit 16 use the voltage or current in its own power transmission device 101. Although the configuration is to be measured, the configuration is not limited to this. The input voltage level acquisition unit 14, the output voltage level acquisition unit 15, and the output current level acquisition unit 16 receive the input voltage level measurement result, the output voltage level measurement result, and the output current level from the power supply side device 151 and the charging target device 152. The structure which acquires the measurement result of this may be sufficient.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a power transmission device that can also supply power to an inverter device as compared with the power transmission device according to the first embodiment. The contents other than those described below are the same as those of the power transmission device according to the first embodiment.

[Configuration and basic operation]
FIG. 5 is a diagram showing a configuration of a charging system according to the second embodiment of the present invention.

  Referring to FIG. 5, charging system 202 includes power transmission device 101, power feeding device 151, charging target device 152, and inverter device 153. The power supply side device 151 and the charging target device 152 are, for example, electric vehicles. FIG. 5 shows a state where the inverter device 153 is connected to the power supply side device 151 instead of the charging target device 152.

  The inverter device 153 includes a DC connector 71, a sensor (monitoring unit) 72, a sensor (current level acquisition unit) 73, a control unit 75, a presentation unit 76, a relay 77, a voltage conversion circuit 78, and an AC connector. 79.

  The inverter device 153 can supply the AC voltage to the load by converting the DC voltage received at the DC connector 71 into an AC voltage and outputting the AC voltage from the AC connector 79. Specifically, the inverter device 153 can generate a commercial AC voltage of 100 V to 200 V by supplying a DC voltage of 100 V to 200 V to the DC connector 71 from the outside.

  In inverter device 153, voltage conversion circuit 78 includes one capacitor and four switch elements, charges the capacitor with the DC voltage received at DC connector 71, and switches the voltage stored in the capacitor by each switch element. As a result, an AC voltage is generated and output to the AC connector 79.

  The sensor 72 monitors the voltage supplied to the DC connector 71, and outputs abnormality information to the control unit 75 when determining that the supply voltage is abnormal.

  The power transmission device 101 transmits the power supplied from the power supply side device 151 to the inverter device 153.

  In the power transmission device 101, the input connector 12 can be fitted to the quick charging connector 34 in the power supply side device 151 and receives a DC voltage from the power supply side device 151.

  The output connector 13 can be further fitted to the DC connector 71 in the inverter device 153.

  The voltage adjustment circuit 11 adjusts the level of the DC voltage received via the input connector 12 and outputs the adjusted DC voltage to the output connector 13.

  Control unit 17 controls voltage adjustment circuit 11 to adjust the level of the DC voltage received via input connector 12 to a predetermined level at which inverter device 153 can perform the conversion operation to AC voltage. .

  The input voltage level acquisition unit 14 measures and acquires the level of the DC voltage supplied from the power supply side device 151.

  The output voltage level acquisition unit 15 measures and acquires the level of the DC voltage supplied from its own power transmission device 101 to the inverter device 153.

  The output current level acquisition unit 16 measures and acquires the level of the direct current supplied from its own power transmission device 101 to the inverter device 153.

  The control unit 17 communicates with the power supply side device 151 and the inverter device 153 using communication means such as CAN (Controller Area Network), PLC (Power Line Communications), and wireless communication.

  The presentation unit 18 presents the user with the power supply status from the power transmission device 101 of the present unit 18 to the inverter device 153. Specifically, the user can grasp the state of charge during charging and the end of charging by sounds such as lamps, character displays, and buzzers.

[Operation]
Next, the operation of the charging system according to the second embodiment of the present invention will be described.

  First, the input connector 12 of the power transmission device 101 is connected to the quick charging connector 34 of the power supply side device 151, and the output connector 13 of the power transmission device 101 is connected to the DC connector 71 of the inverter device 153.

  Next, by turning on the relays 32 and 33 of the power supply side device 151, for example, a DC voltage of 300 V to 400 V is supplied from the storage battery 31 of the power supply side device 151 to the power transmission device 101.

  The power transmission device 101 adjusts the level of the DC voltage supplied from the power supply side device 151 to, for example, 100 V to 200 V, and supplies the adjusted DC voltage to the inverter device 153.

  The DC voltage supplied from the power transmission device 101 to the inverter device 153 is converted into an AC voltage by the voltage conversion circuit 78 and output from the AC connector 79 to the load.

  Further, the control unit 17 outputs a control signal C <b> 1 for causing the power supply side device 151 to start power supply to the power transmission device 101 of the power supply side device 151 to the power supply side device 151. The power supply side device 151 receives the control signal C1 and turns on the relays 32 and 33.

  Control unit 75 in inverter device 153 outputs information M5 indicating the level of the DC voltage to be supplied to inverter device 153 to a predetermined level, for example, to power transmission device 101.

  The control unit 17 in the power transmission device 101 adjusts the level of the DC voltage received via the input connector 12 to the predetermined level by controlling the voltage adjustment circuit 11 based on the information M5 received from the inverter device 153. .

  More specifically, in the power transfer device 101, the control unit 17 includes the DC voltage level acquired by the input voltage level acquisition unit 14, the DC voltage level acquired by the output voltage level acquisition unit 15, and the inverter device 153. The level of the DC voltage received via the input connector 12 is adjusted by controlling the voltage adjustment circuit 11 based on the level of the DC voltage indicated by the information M5 received from the control unit 75 in FIG. Specifically, the control unit 17 adjusts the level of the DC voltage output from the output connector 13 to, for example, 100 V to 200 V by controlling the modulation factor, switching frequency, and the like in the voltage adjustment circuit 11.

  In inverter device 153, sensor 72 determines whether the voltage received at DC connector 71 is a voltage suitable for conversion to AC voltage.

  Then, based on the determination result by the sensor 72, the control unit 75 performs control to stop the conversion operation to AC voltage by its own inverter device 153. Specifically, when the voltage received at the DC connector 71 is too low or too high, the control unit 75 stops switching in the voltage conversion circuit 78 or sends an AC voltage to the AC connector 79 side. Control to stop power supply from the inverter device 153 to the load is performed by a method such as turning off the relay 77 for transmission.

  When the control unit 75 performs control to stop the conversion operation to AC voltage, the presentation unit 76 presents information to the user that the inverter device 153 cannot perform the conversion operation to AC voltage.

  Further, the sensor 73 acquires the amount of current supplied from its own inverter device 153 to the load.

  The control unit 75 performs control to stop the supply of the AC voltage to the load based on the amount of current acquired by the sensor 73. Specifically, when the amount of current supplied from the inverter device 153 to the load exceeds a predetermined value, the control unit 75 turns off the relay 77 for transmitting the AC voltage to the AC connector 79 side. Control is performed to stop the supply of AC voltage from its own inverter device 153 to the load.

  In addition, the control unit 75 performs the control to stop the supply of the AC voltage, and then continues to stop the supply of the AC voltage until receiving an instruction to restart the supply of the AC voltage from the user. Specifically, the inverter device 153 includes a switch that can be operated by the user. The control unit 75 performs control to stop the supply of the AC voltage and turns off the switch. And the control part 75 continues the stop of supply of an alternating voltage until the said switch is turned ON by the user irrespective of the measurement result of the electric current amount by the sensor 73.

  Further, the control unit 75 acquires the amount of power supplied from its own inverter device 153 to the load. More specifically, the control unit 75 calculates the amount of electric power based on the level of the alternating current acquired by the sensor 73. And the control part 75 performs control which stops supply of the alternating voltage from the own inverter apparatus 153 to a load, when the said electric energy reaches a predetermined value.

  As described above, in the power transmission device according to the second embodiment of the present invention, the output connector 13 can further convert the DC voltage received at the DC connector 71 into an AC voltage and supply it to the load. The inverter device 153 can be fitted with the DC connector 71.

  With such a configuration, not only power is transmitted from the power supply side device 151 that is, for example, an electric vehicle to the charging target device 152 that is, for example, an electric vehicle, but also, for example, in the home via the inverter device 153 from the power supply side device 151. It becomes possible to transmit electric power to an electric device, and it is possible to provide more various charging environments.

  Further, in the power transmission device according to the second embodiment of the present invention, the control unit 17 controls the voltage adjustment circuit 11 to change the level of the DC voltage received via the input connector 12 to the inverter device 153. Is adjusted to a predetermined level at which conversion to AC voltage can be performed.

  With such a configuration, the inverter device 153 can stably perform an AC voltage conversion operation.

  In the power transmission device according to the second embodiment of the present invention, the control unit 17 acquires information indicating the predetermined level from the inverter device 153 and controls the voltage adjustment circuit 11 based on the acquired information. As a result, the level of the DC voltage received via the input connector 12 is adjusted to a predetermined level.

  With such a configuration, an appropriate level of DC voltage can be transmitted to the inverter device 153 in response to notification of the desired voltage from the inverter device 153.

  In the inverter device according to the second embodiment of the present invention, the sensor 72 monitors the voltage supplied to the DC connector 71. Then, based on the monitoring result by the sensor 72, the control unit 75 performs control to stop the conversion operation to AC voltage by its own inverter device 153.

  With such a configuration, it is possible to prevent malfunction of the inverter device 153 when an inappropriate voltage is applied.

  Further, in the inverter device according to the second embodiment of the present invention, when the control unit 75 performs the control to stop the conversion operation to the AC voltage, the presentation unit 76 converts the AC voltage by the inverter device 153 thereof. Information indicating that the conversion operation cannot be performed is presented to the user.

  With such a configuration, it is possible to appropriately notify the user of the abnormality, and thus the convenience for the user can be improved.

  In the inverter device according to the second embodiment of the present invention, the sensor 73 acquires the amount of current supplied from its own inverter device 153 to the load. And the control part 75 performs control which stops supply of the alternating voltage to load based on the electric current amount acquired by the sensor 73. FIG.

  With such a configuration, it is possible to prevent an excessive current from being supplied from the inverter device 153 to the load.

  Moreover, in the inverter apparatus according to the second embodiment of the present invention, the control unit 75 performs the control to stop the supply of the AC voltage, and then receives the AC until receiving an instruction to restart the supply of the AC voltage from the user. Continue to stop supplying voltage.

  With such a configuration, for example, after the user inspects each device, the AC voltage supply operation by the inverter device 153 can be resumed.

  In the inverter device according to the second embodiment of the present invention, the control unit 75 acquires the amount of power supplied to the load from its own inverter device 153, and the acquired amount of power reaches a predetermined value. The control for stopping the supply of the AC voltage to the load is performed.

  With such a configuration, it is possible to appropriately control the amount of power supplied from the inverter device 153 to the load.

  In the power transmission device 101, the control unit 17 controls the voltage adjustment circuit 11 based on the level of the direct current voltage received via the input connector 12 to a predetermined level, for example, the inverter device 153. It may be configured to adjust to the level of the DC voltage to be supplied.

  Thus, the convenience of the user can be enhanced by the configuration in which the power adjustment is performed according to the user's operation.

  Since other configurations and operations are the same as those of the power transmission device according to the first embodiment, detailed description thereof will not be repeated here.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Third Embodiment>
The present embodiment relates to a power transmission device in which a power transmission destination is changed as compared with the power transmission device according to the first embodiment. The contents other than those described below are the same as those of the power transmission device according to the first embodiment.

[Configuration and basic operation]
FIG. 6 is a diagram showing a configuration of a charging system according to the third embodiment of the present invention.

  Referring to FIG. 6, charging system 203 includes power transmission device 102, power feeding device 161, and charging target device 162. The power supply side device 161 and the charging target device 162 are, for example, electric vehicles.

  The power supply side device 161 includes a storage battery 31, relays 32 and 33, and a quick charging connector 34.

  The power transmission device 102 includes a voltage adjustment circuit 51, an input connector 52, an output connector 53, an input voltage level acquisition unit 54, an output voltage level acquisition unit 55, an output current level acquisition unit 56, and a control unit 57. And a presentation unit 58.

  The charging target device 162 includes a quick charging connector 61, relays 62 and 63, and a storage battery 64.

  In the power supply side device 161, the storage battery 31 can be charged by supplying a DC voltage of, for example, 200 V to 300 V from the outside to the quick charging connector 34 with the relays 32 and 33 turned on. The voltage level of the storage battery 31 is, for example, 300V to 400V.

  In the charging target device 162, the storage battery 64 can be charged by supplying a DC voltage of, for example, 200 V to 300 V from the outside to the quick charging connector 61 with the relays 62 and 63 turned on. The voltage level of the storage battery 64 is, for example, 300V to 400V.

  The power transmission device 102 transmits the power supplied from the power supply side device 161 to the charging target device 162. Specifically, for example, 1 kW to 3 kW of power is supplied from the power supply side device 161 to the charging target device 162 via the power transmission device 102.

  More specifically, in the power transmission device 102, the input connector 52 can be fitted to the quick charging connector 34 in the power supply side device 161 and receives a DC voltage from the power supply side device 161.

  The output connector 53 can be fitted to the quick charging connector 61 in the charging target device 162.

  The voltage adjustment circuit 51 adjusts the level of the DC voltage received via the input connector 52 while insulating the input side and the output side, and outputs the adjusted DC voltage to the output connector 53.

  The input voltage level acquisition unit 54 measures and acquires the level of the DC voltage supplied from the power supply side device 161.

  The output voltage level acquisition unit 55 measures and acquires the level of the DC voltage supplied from the power transmission apparatus 102 to the charging target apparatus 162.

  The output current level acquisition unit 56 measures and acquires the level of the direct current supplied from its own power transmission device 102 to the charging target device 162.

  The control unit 57 communicates with the power supply side device 161 and the charging target device 162 using communication means such as CAN (Controller Area Network), PLC (Power Line Communications), and wireless communication.

  The presentation unit 58 presents the power supply status from the power transmission apparatus 102 to the charging target apparatus 162 to the user. Specifically, the user can grasp the state of charge during charging and the end of charging by sounds such as lamps, character displays, and buzzers.

  The configuration and operation of the voltage adjustment circuit 51 are the same as those of the circuit shown in FIG. That is, the voltage adjustment circuit 51 includes a transformer circuit.

[Operation]
Next, the operation of the charging system according to the third embodiment of the present invention will be described.

  Referring to FIG. 6, first, input connector 52 of power transmission device 102 is connected to quick charging connector 34 of power supply side device 161, and output of power transmission device 102 is connected to quick charging connector 61 of charging target device 162. The connector 53 is connected.

  Next, by turning on the relays 32 and 33 of the power supply side device 161, for example, a DC voltage of 300 V to 400 V is supplied from the storage battery 31 of the power supply side device 161 to the power transmission device 102.

  The power transmission device 102 adjusts the level of the DC voltage supplied from the power supply side device 161 to 300 V to 400 V, for example, and supplies the adjusted DC voltage to the charging target device 162.

  The DC voltage supplied from the power transmission device 102 to the charging target device 162 is supplied to the storage battery 64 by turning on the relays 62 and 63 of the charging target device 162. Thereby, the storage battery 64 is charged.

  Further, the control unit 57 outputs a control signal C <b> 1 for causing the power supply side device 161 to start power supply to the power transmission device 102 of the power supply side device 161 to the power supply side device 161. The power supply side device 161 receives the control signal C1 and turns on the relays 32 and 33.

  In addition, the control unit 57 outputs a control signal C <b> 2 for causing the charging target device 162 to start charging with the electric power from its own power transmission device 102 to the charging target device 162. Charging target device 162 receives control signal C2 and turns on relays 62 and 63.

  Further, the control unit 57 controls the voltage adjustment circuit 51 based on the level of the DC voltage acquired by the input voltage level acquisition unit 54 and the level of the DC voltage acquired by the output voltage level acquisition unit 55. The level of the DC voltage received through the input connector 52 is adjusted. Specifically, the control unit 57 adjusts the level of the DC voltage output from the output connector 53 to, for example, 300V to 400V by controlling the modulation factor, switching frequency, and the like in the voltage adjustment circuit 51.

  In addition, the power supply side device 161 outputs power supply side information M1 indicating the state of the storage battery 31 to the power transmission device 102.

  The control unit 57 acquires the power supply side information M1 from the power supply side device 161, and performs control to stop the power transmission from the own power transmission device 102 to the charging target device 162 based on the acquired power supply side information M1. Specifically, when power supply side information M1 indicates that the charging rate of storage battery 31 is, for example, less than 90%, control unit 57 stops switching in voltage adjustment circuit 51 or outputs a DC voltage. Control to stop power transmission from the power transmission apparatus 102 to the charging target apparatus 162 is performed by a method such as turning off a switch (not shown) for transmission to the connector 53 side.

  In addition, charging target device 162 outputs charging target information M <b> 2 indicating the state of storage battery 64 to power transmission device 102.

  The control unit 57 acquires the charging target information M2 from the charging target device 162, and performs control to stop power transmission from the own power transmission device 102 to the charging target device 162 based on the acquired charging target information M2. Specifically, when charging target information M2 indicates that the charging rate of storage battery 64 has reached, for example, 90%, control unit 57 stops switching in voltage adjustment circuit 51 or outputs a DC voltage. Control to stop power transmission from the power transmission apparatus 102 to the charging target apparatus 162 is performed by a method such as turning off a switch (not shown) for transmission to the connector 53 side.

  In addition, the control unit 57 acquires the amount of power supplied from the own power transmission device 102 to the charging target device 162. More specifically, the control unit 57 calculates the electric energy based on the DC current level acquired by the output current level acquisition unit 56 and the DC voltage level acquired by the output voltage level acquisition unit 55. And the control part 57 performs control which stops the electric power transmission from the own electric power transmission apparatus 102 to the charging object apparatus 162, when the said electric energy reaches a predetermined value.

  By the way, when charging EV outdoors when there is a shortage of electricity, it is conceivable that EVs can be connected by a cable, such as an engine car, so that power can be delivered. However, since the voltage level of the EV battery varies from manufacturer to manufacturer, the voltage level of the power feeding side EV may be lower or higher than the voltage level of the charging target EV. The voltage difference of EV tends to increase. For this reason, it is difficult to simply deliver power by connecting EVs with cables.

  Specifically, when the power supply side device 161 and the charging target device 162 are EVs, these two EVs have different storage battery voltage levels when the vehicle types are different, so that the storage battery voltage levels are also different. Moreover, even if the vehicle type is the same, the electromotive voltage of the storage battery varies depending on the state of charge of the storage battery. For this reason, it is difficult to supply a direct current voltage of, for example, 300 V to 400 V from the power supply side EV that is the power supply side device 161 to the charging target device 162 as it is.

  In contrast, in the power transmission device according to the third embodiment of the present invention, the output connector 53 that can be fitted to the quick charging connector 61 in the charging target device 162 is provided, and the voltage adjustment circuit 51 is connected to the input side. The level of the DC voltage received from the power supply side device 161 via the input connector 52 is adjusted while the output sides are insulated, and the adjusted DC voltage is output to the output connector 53.

  As described above, in the power transmission device according to the third embodiment of the present invention, the voltage adjustment function 51 can be provided by providing the voltage adjustment circuit 51. With this voltage adjustment circuit 51, it is possible to increase or decrease the direct current voltage from the power feeding side EV and perform voltage adjustment.

  Therefore, in the power transmission device according to the third embodiment of the present invention, the power supplied from the power supply side device is supplied to the charge target device regardless of the difference between the voltage level of the power supply side device and the voltage level of the charge target device. Good transmission can be achieved with a simple configuration.

  For example, in the power transmission device according to the third embodiment of the present invention, the rapid charging port of the power feeding side EV and the rapid power receiving port of the charging target EV are connected to transfer power. A voltage adjustment circuit such as a step-down circuit is built in, and the voltage is adjusted so as to be within a specific voltage range.

  With such a configuration, it is possible to perform charging using a normal on-vehicle charger as it is, and it is possible to perform a smooth charging operation without adding any special changes to the power supply side device and the charging target device.

  That is, by using the power transmission device according to the third embodiment of the present invention, it is possible to take measures against the electric shortage of the EV while unnecessary or minimizing the modification of the feeding side EV.

  In the power transmission device according to the third embodiment of the present invention, the control unit 57 transmits a control signal for causing the power supply side device 161 to start supplying power to the power transmission device 102 of the power supply side device 161. Output to.

  With such a configuration, the relays 32 and 33 can be turned on not only when the power supply side device 161 is charged by power supplied from the outside but also when power is supplied to other devices. The power stored in the side device 161 can be acquired by the power transmission device 102.

  Moreover, in the power transmission device according to the third embodiment of the present invention, the control unit 57 sends a control signal for causing the charging target device 162 to start charging with power from its own power transmission device 102. Output to 162.

  With such a configuration, it is possible to notify the charging target device 162 that power is supplied from the outside and to turn on the relays 62 and 63, so that the charging operation to the storage battery 64 can be started.

  Further, in the power transmission device according to the third embodiment of the present invention, the control unit 57 includes the DC voltage level acquired by the input voltage level acquisition unit 54 and the DC voltage acquired by the output voltage level acquisition unit 55. By controlling the voltage adjustment circuit 51 based on the voltage level, the level of the DC voltage received through the input connector 52 is adjusted.

  With such a configuration, the level of the DC voltage supplied to the charging target device 162 can be appropriately controlled.

  Moreover, in the power transmission device according to the third embodiment of the present invention, the control unit 57 acquires the power supply side information indicating the state of the storage battery 31 in the power supply side device 161, and based on the acquired power supply side information, Control is performed to stop power transmission from its own power transmission device 102 to charging target device 162.

  With such a configuration, for example, it is possible to prevent the amount of charge of the storage battery 31 in the power supply side device 161 from being excessively reduced.

  Moreover, in the power transmission device according to the third embodiment of the present invention, the control unit 57 acquires charging target information indicating the state of the storage battery 64 in the charging target device 162, and based on the acquired charging target information, Control is performed to stop power transmission from its own power transmission device 102 to charging target device 162.

  With such a configuration, for example, overcharging of the storage battery 64 in the charging target device 162 can be prevented.

  Moreover, in the power transmission device according to the third embodiment of the present invention, when the charging power to the charging target device 162 reaches a preset constant power capacity, the power supply is automatically stopped. That is, the control unit 57 acquires the amount of power supplied from the own power transmission device 102 to the charging target device 162, and when the acquired amount of power reaches a predetermined value, the control unit 57 charges from the own power transmission device 102. Control to stop power transmission to the target device 162 is performed.

  With such a configuration, it is possible to appropriately control the amount of power supplied from its own power transmission device 102 to the charging target device 162.

  In the power transmission device according to the third embodiment of the present invention, the presentation unit 58 presents the user with the power supply status from the power transmission device 102 to the charging target device 162.

  With such a configuration, the charging status can be presented to the user, and the convenience for the user can be improved.

  Moreover, in the power transmission device according to the third embodiment of the present invention, the voltage adjustment circuit 51 includes a transformer circuit.

  With such a configuration, large power can be supplied to the charging target device 162. Further, compared to a configuration using a chopper circuit, the power supply side device 161 and the charging target device 162 can be electrically insulated, and therefore, the present invention is not limited to the presence or absence of an insulating circuit in the power supply side device 161 and the charging target device 162. It becomes possible to perform charging work.

  Further, in the power transmission device according to the third embodiment of the present invention, as in the power transmission device according to the first embodiment of the present invention, the voltage adjustment circuit 51 includes a switch, and is input by the switch. The level of the DC voltage is adjusted by switching the voltage, and the switching frequency of the switch is 10 kHz or more and 50 kHz or less. As described above, the configuration in which the switching frequency in the voltage adjustment circuit 51 is set to be higher than the frequency of the commercial AC power source, such as 10 kHz to 50 kHz, can realize downsizing of the transformer and the reactor.

  Voltage adjustment circuit 51 further includes a winding wound around a core and to which a switched input voltage is applied, and the core includes any one of ferrite, an amorphous alloy, and a dust core. As a result, loss at high frequencies can be reduced and heat generation can be suppressed.

  In the charging system according to the third embodiment of the present invention, the power supply side device 161 and the charging target device 162 are electric vehicles.

  With such a configuration, it is possible to satisfactorily perform charging between electric vehicles, which are difficult to transfer power by simply connecting with a cable, with a simple configuration.

  In the power transmission device according to the third embodiment of the present invention, the voltage adjustment circuit 51 may be integrated with at least one of the input connector 52 and the output connector 53.

  With such a configuration, a cable between the connector and the voltage adjustment circuit is not necessary, and the cost can be reduced.

  Moreover, in the power transmission device according to the third embodiment of the present invention, the input voltage level acquisition unit 54, the output voltage level acquisition unit 55, and the output current level acquisition unit 56 use the voltage or current in its own power transmission device 102. Although the configuration is to be measured, the configuration is not limited to this. The input voltage level acquisition unit 54, the output voltage level acquisition unit 55, and the output current level acquisition unit 56 receive the input voltage level measurement result, the output voltage level measurement result, and the output current level from the power supply side device 161 and the charging target device 162. The structure which acquires the measurement result of this may be sufficient.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Fourth embodiment>
The present embodiment relates to a power transmission device that can also supply power to an inverter device as compared with the power transmission device according to the third embodiment. The contents other than those described below are the same as those of the power transmission device according to the third embodiment.

[Configuration and basic operation]
FIG. 7 is a diagram showing a configuration of a charging system according to the fourth embodiment of the present invention.

  Referring to FIG. 7, charging system 204 includes power transmission device 102, power feeding device 161, charging target device 162, and inverter device 153. The power supply side device 161 and the charging target device 162 are, for example, electric vehicles. FIG. 7 shows a state where the inverter device 153 is connected to the power supply side device 161 instead of the charging target device 162.

  The inverter device 153 includes a DC connector 71, a sensor (monitoring unit) 72, a sensor (current level acquisition unit) 73, a control unit 75, a presentation unit 76, a relay 77, a voltage conversion circuit 78, and an AC connector. 79.

  The inverter device 153 can supply the AC voltage to the load by converting the DC voltage received at the DC connector 71 into an AC voltage and outputting the AC voltage from the AC connector 79. Specifically, the inverter device 153 can generate a commercial AC voltage of 100 V to 200 V by supplying a DC voltage of 100 V to 200 V to the DC connector 71 from the outside.

  In inverter device 153, voltage conversion circuit 78 includes one capacitor and four switch elements, charges the capacitor with the DC voltage received at DC connector 71, and switches the voltage stored in the capacitor by each switch element. As a result, an AC voltage is generated and output to the AC connector 79.

  The sensor 72 monitors the voltage supplied to the DC connector 71, and outputs abnormality information to the control unit 75 when determining that the supply voltage is abnormal.

  The power transmission device 102 transmits the power supplied from the power supply side device 161 to the inverter device 153.

  In the power transmission device 102, the input connector 52 can be fitted to the quick charging connector 34 in the power supply side device 161 and receives a DC voltage from the power supply side device 161.

  The output connector 53 can be further fitted to the DC connector 71 in the inverter device 153.

  The voltage adjustment circuit 51 adjusts the level of the DC voltage received via the input connector 52 while insulating the input side and the output side, and outputs the adjusted DC voltage to the output connector 53.

  The control unit 17 controls the voltage adjustment circuit 51 to adjust the level of the DC voltage received via the input connector 52 to a predetermined level at which the inverter device 153 can perform the conversion operation to the AC voltage. .

  The input voltage level acquisition unit 54 measures and acquires the level of the DC voltage supplied from the power supply side device 161.

  The output voltage level acquisition unit 55 measures and acquires the level of the DC voltage supplied from the power transmission device 102 to the inverter device 153.

  The output current level acquisition unit 56 measures and acquires the level of the direct current supplied from its own power transmission device 102 to the inverter device 153.

  The control unit 17 communicates with the power supply side device 161 and the inverter device 153 using communication means such as CAN (Controller Area Network), PLC (Power Line Communications), and wireless communication.

  The presentation unit 18 presents the power supply status from the power transmission device 102 to the inverter device 153 to the user. Specifically, the user can grasp the state of charge during charging and the end of charging by sounds such as lamps, character displays, and buzzers.

[Operation]
Next, the operation of the charging system according to the fourth embodiment of the present invention will be described.

  First, the input connector 52 of the power transmission device 102 is connected to the quick charging connector 34 of the power supply side device 161, and the output connector 53 of the power transmission device 102 is connected to the DC connector 71 of the inverter device 153.

  Next, by turning on the relays 32 and 33 of the power supply side device 161, for example, a DC voltage of 300 V to 400 V is supplied from the storage battery 31 of the power supply side device 161 to the power transmission device 102.

  The power transmission device 102 adjusts the level of the DC voltage supplied from the power supply side device 161 to, for example, 100 V to 200 V, and supplies the adjusted DC voltage to the inverter device 153.

  The DC voltage supplied from the power transmission device 102 to the inverter device 153 is converted into an AC voltage by the voltage conversion circuit 78 and output from the AC connector 79 to the load.

  In addition, the control unit 17 outputs a control signal C <b> 1 for causing the power supply side device 161 to start power supply to its own power transmission device 102 to the power supply side device 161. The power supply side device 161 receives the control signal C1 and turns on the relays 32 and 33.

  Control unit 75 in inverter device 153 outputs information M5 indicating the level of a DC voltage to be supplied to inverter device 153 to a predetermined level, for example, to power transmission device 102.

  Control unit 17 in power transmission device 102 adjusts the level of the DC voltage received via input connector 52 to the predetermined level by controlling voltage adjustment circuit 51 based on information M5 received from inverter device 153. .

  More specifically, in the power transmission device 102, the control unit 17 includes the DC voltage level acquired by the input voltage level acquisition unit 54, the DC voltage level acquired by the output voltage level acquisition unit 55, and the inverter device 153. The level of the DC voltage received via the input connector 52 is adjusted by controlling the voltage adjustment circuit 51 based on the level of the DC voltage indicated by the information M5 received from the control unit 75 in FIG. Specifically, the control unit 17 adjusts the level of the DC voltage output from the output connector 53 to, for example, 100 V to 200 V by controlling the modulation factor, the switching frequency, and the like in the voltage adjustment circuit 51.

  In inverter device 153, sensor 72 determines whether the voltage received at DC connector 71 is a voltage suitable for conversion to AC voltage.

  Then, based on the determination result by the sensor 72, the control unit 75 performs control to stop the conversion operation to AC voltage by its own inverter device 153. Specifically, when the voltage received at the DC connector 71 is too low or too high, the control unit 75 stops switching in the voltage conversion circuit 78 or sends an AC voltage to the AC connector 79 side. Control to stop power supply from the inverter device 153 to the load is performed by a method such as turning off the relay 77 for transmission.

  When the control unit 75 performs control to stop the conversion operation to AC voltage, the presentation unit 76 presents information to the user that the inverter device 153 cannot perform the conversion operation to AC voltage.

  Further, the sensor 73 acquires the amount of current supplied from its own inverter device 153 to the load.

  The control unit 75 performs control to stop the supply of the AC voltage to the load based on the amount of current acquired by the sensor 73. Specifically, when the amount of current supplied from the inverter device 153 to the load exceeds a predetermined value, the control unit 75 turns off the relay 77 for transmitting the AC voltage to the AC connector 79 side. Control is performed to stop the supply of AC voltage from its own inverter device 153 to the load.

  In addition, the control unit 75 performs the control to stop the supply of the AC voltage, and then continues to stop the supply of the AC voltage until receiving an instruction to restart the supply of the AC voltage from the user. Specifically, the inverter device 153 includes a switch that can be operated by the user. The control unit 75 performs control to stop the supply of the AC voltage and turns off the switch. And the control part 75 continues the stop of supply of an alternating voltage until the said switch is turned ON by the user irrespective of the measurement result of the electric current amount by the sensor 73.

  Further, the control unit 75 acquires the amount of power supplied from its own inverter device 153 to the load. More specifically, the control unit 75 calculates the amount of electric power based on the level of the alternating current acquired by the sensor 73. And the control part 75 performs control which stops supply of the alternating voltage from the own inverter apparatus 153 to a load, when the said electric energy reaches a predetermined value.

  As described above, in the power transmission device according to the fourth embodiment of the present invention, the output connector 53 can further convert the DC voltage received at the DC connector 71 into an AC voltage and supply it to the load. The inverter device 153 can be fitted with the DC connector 71.

  With such a configuration, not only power is transmitted from the power supply side device 161 that is, for example, an electric vehicle to the charge target device 162 that is, for example, an electric vehicle, but also, for example, in the home via the inverter device 153 from the power supply side device 161 It becomes possible to transmit electric power to an electric device, and it is possible to provide more various charging environments.

  Further, in the power transmission device according to the fourth embodiment of the present invention, the control unit 17 controls the voltage adjustment circuit 51 so that the level of the DC voltage received via the input connector 52 is changed to the inverter device 153. Is adjusted to a predetermined level at which conversion to AC voltage can be performed.

  With such a configuration, the inverter device 153 can stably perform an AC voltage conversion operation.

  In the power transmission device according to the fourth embodiment of the present invention, the control unit 17 acquires information indicating the predetermined level from the inverter device 153, and controls the voltage adjustment circuit 51 based on the acquired information. As a result, the level of the DC voltage received via the input connector 52 is adjusted to a predetermined level.

  With such a configuration, an appropriate level of DC voltage can be transmitted to the inverter device 153 in response to notification of the desired voltage from the inverter device 153.

  In the inverter device according to the fourth embodiment of the present invention, the sensor 72 monitors the voltage supplied to the DC connector 71. Then, based on the monitoring result by the sensor 72, the control unit 75 performs control to stop the conversion operation to AC voltage by its own inverter device 153.

  With such a configuration, it is possible to prevent malfunction of the inverter device 153 when an inappropriate voltage is applied.

  Further, in the inverter device according to the fourth embodiment of the present invention, when the control unit 75 performs control to stop the conversion operation to the AC voltage, the presentation unit 76 converts the AC voltage by the inverter device 153 to its own. Information indicating that the conversion operation cannot be performed is presented to the user.

  With such a configuration, it is possible to appropriately notify the user of the abnormality, and thus the convenience for the user can be improved.

  In the inverter device according to the fourth embodiment of the present invention, the sensor 73 acquires the amount of current supplied from its own inverter device 153 to the load. And the control part 75 performs control which stops supply of the alternating voltage to load based on the electric current amount acquired by the sensor 73. FIG.

  With such a configuration, it is possible to prevent an excessive current from being supplied from the inverter device 153 to the load.

  Further, in the inverter device according to the fourth embodiment of the present invention, the control unit 75 performs the control to stop the supply of the AC voltage, and then receives the AC until receiving an instruction to restart the supply of the AC voltage from the user. Continue to stop supplying voltage.

  With such a configuration, for example, after the user inspects each device, the AC voltage supply operation by the inverter device 153 can be resumed.

  In the inverter device according to the fourth embodiment of the present invention, the control unit 75 acquires the amount of power supplied from the inverter device 153 to the load, and the acquired amount of power reaches a predetermined value. The control for stopping the supply of the AC voltage to the load is performed.

  With such a configuration, it is possible to appropriately control the amount of power supplied from the inverter device 153 to the load.

  In the power transmission device 102, the control unit 17 controls the voltage adjustment circuit 51 based on the level of the DC voltage received via the input connector 52 based on the user's operation, so that the predetermined level, for example, the inverter device 153 is applied. It may be configured to adjust to the level of the DC voltage to be supplied.

  Thus, the convenience of the user can be enhanced by the configuration in which the power adjustment is performed according to the user's operation.

  Since other configurations and operations are the same as those of the power transmission device according to the third embodiment, detailed description thereof will not be repeated here.

  Since other configurations and operations are the same as those of the power transmission device according to the first embodiment, detailed description thereof will not be repeated here.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 11 Voltage adjustment circuit 12 Input connector 13 Output connector 14 Input voltage level acquisition part 15 Output voltage level acquisition part 16 Output current level acquisition part 17 Control part 18 Presentation part 21 Connector for normal charging 22 Rectification circuit 23 Voltage adjustment circuit 24 Rectification circuit 25 Capacitor 26 Storage battery 27 Sensor (Voltage discrimination unit)
28 Monitoring Unit 29 Power Conversion Circuit 31 Storage Battery 32, 33 Relay 34 Quick Charge Connector 51 Voltage Adjustment Circuit 52 Input Connector 53 Output Connector 54 Input Voltage Level Acquisition Unit 55 Output Voltage Level Acquisition Unit 56 Output Current Level Acquisition Unit 57 Control Unit 58 Presentation unit 61 Quick charge connector 62, 63 Relay 64 Storage battery 71 DC connector 72 Sensor (monitoring unit)
73 sensor (current level acquisition unit)
75 Control Unit 76 Presenting Unit 77 Relay 78 Voltage Conversion Circuit 79 AC Connector 101, 102 Power Transfer Device 151, 161 Power Supply Side Device 152, 162 Charge Target Device 153 Inverter Device 201, 202, 203, 204 Charging System

Claims (33)

A power transmission device for transmitting the power supplied from the power supply side device to the charging target device capable of converting the alternating voltage received at the charging connector into a direct current voltage and supplying it to the storage battery,
An input connector for receiving a DC voltage from the power supply side device;
An output connector that can be fitted to the charging connector in the charging target device;
A power transmission device comprising: a voltage adjustment circuit for adjusting a level of a DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector. The power transmission device further includes:
The power transmission device according to claim 1, further comprising: a control unit configured to output a control signal for causing the power feeding side device to start power supply to the power feeding device of the power feeding side device to the power feeding side device. The power transmission device further includes:
The power transmission device according to claim 1, further comprising: a control unit configured to output a control signal for causing the charging target device to start charging with power from its own power transmission device to the charging target device. The power transmission device further includes:
4. The apparatus according to claim 1, further comprising a control unit configured to output supply voltage information indicating that a direct-current voltage is supplied from the own power transmission device to the charging target device to the charging target device. 5. Power transmission device. The power transmission device further includes:
An input voltage level acquisition unit for acquiring the level of the DC voltage supplied from the power supply side device;
An output voltage level acquisition unit for acquiring the level of the DC voltage supplied to the charging target device from its own power transmission device;
By controlling the voltage adjustment circuit based on the level of the DC voltage acquired by the input voltage level acquisition unit and the level of the DC voltage acquired by the output voltage level acquisition unit, via the input connector The power transmission device according to any one of claims 1 to 4, further comprising a control unit for adjusting a level of the DC voltage received in the step. The power transmission device further includes:
Control for acquiring power supply side information indicating the state of the storage battery in the power supply side device, and performing control for stopping power transmission from the own power transmission device to the charging target device based on the acquired power supply side information The power transmission device according to claim 1, further comprising a unit. The power transmission device further includes:
Control for acquiring charging target information indicating a state of a storage battery in the charging target device, and performing control for stopping power transmission from the own power transmission device to the charging target device based on the acquired charging target information The power transmission device according to claim 1, further comprising a unit. The power transmission device further includes:
When the amount of power supplied from the own power transmission device to the charging target device is acquired and the acquired amount of power reaches a predetermined value, power transmission from the own power transmission device to the charging target device is performed. The power transmission device according to any one of claims 1 to 7, further comprising a control unit for performing control to stop. The power transmission device further includes:
The power transmission device according to any one of claims 1 to 8, further comprising a presentation unit for presenting a user with a status of power supply from the power transmission device of the device to the charging target device.   The power transmission device according to any one of claims 1 to 9, wherein the voltage adjustment circuit is integrated with at least one of the input connector and the output connector.   The power transmission device according to claim 1, wherein the voltage adjustment circuit includes a chopper circuit.   The power transmission device according to claim 1, wherein the voltage adjustment circuit includes a transformer circuit. The voltage adjustment circuit includes a switch, adjusts the level of the DC voltage by switching the input voltage with the switch, and the switching frequency of the switch is 10 kHz to 50 kHz,
The voltage regulation circuit further includes a winding wound around a core and applied with the switched input voltage;
The power transmission device according to claim 11 or 12, wherein the core includes any one of a ferrite, an amorphous alloy, and a dust core.   The output connector can be further fitted to the DC connector in an inverter device capable of converting a DC voltage received at the DC connector into an AC voltage and supplying the AC voltage to a load. The power transmission device according to Item 1. The power transmission device further includes:
A control unit for adjusting the level of the DC voltage received via the input connector to a predetermined level at which the inverter device can perform the conversion operation to the AC voltage by controlling the voltage adjustment circuit; The power transmission device according to claim 14, comprising:   The control unit acquires information indicating the predetermined level from the inverter device, and controls the voltage adjustment circuit based on the acquired information, thereby determining the level of the DC voltage received through the input connector. The power transmission device according to claim 15, wherein the power transmission device is adjusted to a predetermined level.   The power transmission device according to claim 15, wherein the control unit adjusts a level of a DC voltage received via the input connector to the predetermined level by controlling the voltage adjustment circuit based on a user operation. .   The power transmission device according to any one of claims 1 to 17, wherein the power supply side device and the charging target device are electric vehicles. A device to be charged,
A power transmission device for supplying the power supplied from the power supply side device to the device to be charged,
The device to be charged is
A storage battery,
A charging connector;
A power conversion circuit for converting the alternating voltage received at the charging connector into a direct current voltage and supplying it to the storage battery;
The power transmission device includes:
An input connector for receiving a DC voltage from the power supply side device;
An output connector that can be fitted to the charging connector in the charging target device;
A voltage adjusting circuit for adjusting the level of the DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector;
A control unit for outputting supply voltage information indicating that a direct current voltage is supplied from the own power transmission device to the charging target device, to the charging target device;
The charging target device further includes:
A monitoring unit for monitoring the voltage supplied to the charging connector;
When the monitoring unit receives the supply voltage information from the power transmission device, the monitoring unit performs the monitoring assuming that the voltage supplied to the charging connector is a DC voltage. A device to be charged,
A power transmission device for supplying the power supplied from the power supply side device to the device to be charged,
The device to be charged is
A storage battery,
A charging connector;
A power conversion circuit for converting the alternating voltage received at the charging connector into a direct current voltage and supplying it to the storage battery;
The power transmission device includes:
An input connector for receiving a DC voltage from the power supply side device;
An output connector that can be fitted to the charging connector in the charging target device;
A voltage adjustment circuit for adjusting the level of the DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector;
The charging target device further includes:
A voltage discriminating unit for discriminating whether the voltage received at the charging connector is a DC voltage or an AC voltage;
A monitoring unit for monitoring the voltage supplied to the charging connector;
The monitoring unit performs the monitoring by recognizing that a voltage supplied to the charging connector is a DC voltage or an AC voltage based on a determination result by the voltage determination unit. A device to be charged,
An inverter device capable of converting a DC voltage into an AC voltage and supplying it to a load;
A power transmission device for supplying the power supplied from the power supply side device to the charging target device and the inverter device;
The device to be charged includes a connector for charging,
The power transmission device includes:
An input connector for receiving a DC voltage from the power supply side device;
An output connector that can be fitted to the charging connector in the charging target device;
A voltage adjustment circuit for adjusting the level of the DC voltage received via the input connector and outputting the adjusted DC voltage to the output connector;
The inverter device is
A DC connector for receiving a DC voltage from the power supply side device;
The output connector can be further fitted with the DC connector in the inverter device,
The inverter device further includes:
A monitoring unit for monitoring the voltage supplied to the DC connector;
A charging system comprising: a control unit for performing control to stop the conversion operation to an AC voltage by the inverter device based on a monitoring result by the monitoring unit. The inverter device further includes:
When the control unit performs control to stop the conversion operation to the AC voltage, the control unit includes a presentation unit for presenting information to the user that the conversion operation to the AC voltage by the inverter device itself cannot be performed. The charging system according to claim 21. The inverter device further includes:
A current level acquisition unit for acquiring the amount of current supplied to the load from the inverter device of its own;
The charging system according to claim 21 or 22, wherein the control unit further performs control to stop the supply of the AC voltage to the load based on the amount of current acquired by the current level acquisition unit.   The said control part continues the stop of supply of the said AC voltage until it receives the instruction | indication which restarts the supply of the said AC voltage from a user after performing control which stops the supply of the said AC voltage. Charging system.   The control unit further acquires the amount of power supplied to the load from its own inverter device, and when the acquired amount of power reaches a predetermined value, supplies the AC voltage to the load. The charging system according to any one of claims 21 to 24, wherein control for stopping is performed. A power transmission device for transmitting power supplied from a power supply side device to a charging target device capable of supplying a direct current voltage received at a charging connector to a storage battery,
An input connector for receiving a DC voltage from the power supply side device;
An output connector that can be fitted to the charging connector in the charging target device;
A power transmission device comprising: a voltage adjustment circuit for adjusting a level of a DC voltage received through the input connector and outputting the adjusted DC voltage to the output connector while insulating between the input side and the output side . The power transmission device further includes:
27. The power transmission device according to claim 26, further comprising a control unit configured to output a control signal for causing the power supply side device to start power supply to the power transmission device of the power supply side device to the power supply side device. The power transmission device further includes:
28. The power transmission device according to claim 26 or 27, further comprising a control unit configured to output a control signal for causing the charging target device to start charging with power from its own power transmission device to the charging target device. The power transmission device further includes:
An input voltage level acquisition unit for acquiring the level of the DC voltage supplied from the power supply side device;
An output voltage level acquisition unit for acquiring the level of the DC voltage supplied to the charging target device from its own power transmission device;
By controlling the voltage adjustment circuit based on the level of the DC voltage acquired by the input voltage level acquisition unit and the level of the DC voltage acquired by the output voltage level acquisition unit, via the input connector The power transmission device according to any one of claims 26 to 28, further comprising: a control unit for adjusting a level of the DC voltage received. The power transmission device further includes:
Control for acquiring power supply side information indicating the state of the storage battery in the power supply side device, and performing control for stopping power transmission from the own power transmission device to the charging target device based on the acquired power supply side information The power transmission device according to any one of claims 26 to 29, further comprising a unit. The power transmission device further includes:
Control for acquiring charging target information indicating a state of a storage battery in the charging target device, and performing control for stopping power transmission from the own power transmission device to the charging target device based on the acquired charging target information The power transmission device according to claim 26, further comprising a unit. The power transmission device further includes:
When the amount of power supplied from the own power transmission device to the charging target device is acquired and the acquired amount of power reaches a predetermined value, power transmission from the own power transmission device to the charging target device is performed. The power transmission device according to any one of claims 26 to 31, further comprising a control unit for performing control to stop. The output connector can be further fitted with the DC connector in an inverter device capable of converting the DC voltage received at the DC connector into an AC voltage and supplying the load to the load.
The power transmission device further includes:
A control unit for adjusting the level of the DC voltage received via the input connector to a predetermined level at which the inverter device can perform the conversion operation to the AC voltage by controlling the voltage adjustment circuit; Prepared,
The control unit acquires information indicating the predetermined level from the inverter device, and controls the voltage adjustment circuit based on the acquired information, thereby determining the level of the DC voltage received through the input connector. The power transmission device according to any one of claims 26 to 32, wherein the power transmission device is adjusted to a predetermined level.

Images