WO2011078397A1 - Power feed system for electric vehicle - Google Patents

Power feed system for electric vehicle Download PDF

Info

Publication number
WO2011078397A1
WO2011078397A1 PCT/JP2010/073842 JP2010073842W WO2011078397A1 WO 2011078397 A1 WO2011078397 A1 WO 2011078397A1 JP 2010073842 W JP2010073842 W JP 2010073842W WO 2011078397 A1 WO2011078397 A1 WO 2011078397A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
electric vehicle
battery
feeding
distribution board
Prior art date
Application number
PCT/JP2010/073842
Other languages
French (fr)
Inventor
Satoru Ueno
Original Assignee
Panasonic Electric Works Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Electric Works Co., Ltd. filed Critical Panasonic Electric Works Co., Ltd.
Priority to KR1020127015960A priority Critical patent/KR101437019B1/en
Priority to CN201080058309.6A priority patent/CN102668312B/en
Publication of WO2011078397A1 publication Critical patent/WO2011078397A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/63—Monitoring or controlling charging stations in response to network capacity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J3/322—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/20—AC to AC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/12—Remote or cooperative charging

Definitions

  • the invention relates generally to a power feeding system for electric vehicle.
  • the present invention comprises- a DC distribution board comprising a distribution circuit, said distribution circuit being configured to distribute DC power from at least one DC power supply to a plurality of outputs, " a bidirectional power feeding device configured to perform a charging operation for feeding a battery of an electric vehicle with DC power from the DC distribution board, and a feeding operation for supplying the DC distribution board with DC power from the battery of the electric vehicle; and a control device configured to generate a switching signal for changing the operation of the bidirectional power feeding device to either the charging operation or the feeding operation based on both power supplied from said at least one DC power supply and power required for the distribution circuit side.
  • the bidirectional power feeding device comprises " a control part configured to make the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device; a vehicle side feeding part configured to supply the electric vehicle with DC power from the DC distribution board when the electric vehicle is charged; and a distribution board side feeding part configured to supply the DC distribution board with DC power from the electric vehicle when the electric vehicle discharges.
  • the bidirectional power feeding device when charging the battery of the electric vehicle, DC power is supplied from the DC distribution board to the electric vehicle through the bidirectional power feeding device. Therefore, there is no need to convert AC into DC in the electric vehicle side. For this reason, conversion loss does not generate for converting AC into DC.
  • the bidirectional power feeding device when discharging the battery of the electric vehicle thereby feeding power from the electric vehicle side, the bidirectional power feeding device directly supplies the DC distribution board with DC power stored in the battery of the electric vehicle. Therefore, there is no need to convert DC power supplied from the electric vehicle into AC power. For this reason, conversion loss does not generate for converting DC into AC. Therefore, electric power can be used efficiently.
  • the DC distribution board is arranged in a building.
  • the electric vehicle is further equipped with a charge -discharge part for charging and discharging the battery, and a charge -discharge control part for controlling the operation of the charge -discharge part.
  • the bidirectional power feeding device is configured to supply the charge-discharge part of the electric vehicle with DC power supplied from the DC distribution board when the charging operation, and configured to supply the DC distribution board with DC power fed from the charge -discharge part of the electric vehicle when the feeding operation.
  • the control part of the bidirectional power feeding device is configured to, via the charge -discharge control part of the electric vehicle, make the charge-discharge control part of the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device.
  • said at least one DC power supply comprises a storage battery, said storage battery being configured to be charged by DC power supplied from other DC power supply and configured to discharge when said other DC power supply stops feeding power.
  • the storage battery is configured to be charged by DC power supplied from the distribution board side feeding part when the electric vehicle discharges.
  • DC power discharged from the battery of the electric vehicle can be stored in the storage battery.
  • FIG. 1 is a diagram showing a system structure of an embodiment of the present invention. "
  • FIG. 2 is a diagram showing a system structure of another embodiment of the present invention.
  • the embodiment of the power feeding system for electric vehicle is not only configured to supply an electric vehicle, such as a Plug-in Hybrid Vehicle (PHV) or a Battery Electric Vehicle (BEV), with DC power to charge a battery of the electric vehicle, but also configured to supply house side with electric power stored in the battery of the electric vehicle by making the battery of the electric vehicle discharge when shortage of electricity occurs at the house side.
  • PSV Plug-in Hybrid Vehicle
  • BEV Battery Electric Vehicle
  • Fig. 1 shows a schematic diagram of the power feeding system for electric vehicle.
  • the power feeding system for electric vehicle includes a DC distribution board 1, a bidirectional power feeding device 2, a control device 3, and a setting/displaying device 4.
  • the DC distribution board 1 is arranged at a house H, and is configured to distribute DC power supplied from DC power supply to branch circuits arranged in the house H.
  • the bidirectional power feed ng device 2 is configured to perform a charging operation for feeding a battery of an electric vehicle with DC power from the DC distribution board, and a feeding operation for supplying the DC distribution board with DC power from the battery of the electric vehicle.
  • the bidirectional power feeding device 2 is configured to perform either a charging operation or a feeding operation.
  • the bidirectional power feeding device 2 feeds a charge -discharge circuit 63 of an electric vehicle 60 with DC power supplied from the DC distribution board 1 in the charging operation.
  • the bidirectional power feeding device 2 supplies the DC distribution board 1 with DC power fed from the charge -discharge circuit 63 of the electric vehicle 60 in the feeding operation.
  • the electric vehicle 60 includes a connector 61, a battery 62 such as a lithium-ion battery, the charge -discharge circuit 63, a communication circuit 64 and a charge -discharge control circuit 65.
  • the connector 61 is configured to be detachably attached to a feed connector 26.
  • the feed connector 26 is provided at the end of a charging cable CA led out from the bidirectional power feeding device 2.
  • the charge -discharge circuit 63 is configured to charge and discharge the battery 62.
  • the communication circuit 64 is configured to communicate with the bidirectional power feeding device 2.
  • the charge -discharge control circuit 65 is configured, based on a switching signal supplied from the bidirectional power feeding device 2 and received by the communication circuit 64, to change the operation of the charge-discharge circuit 63 to either a charging operation or a feeding operation.
  • the DC distribution board 1 is in conformity with 300 V class DC voltage.
  • a cooperation control part 11 and a plurality of DC circuit breakers 12 are embedded in the DC distribution board 1.
  • the cooperation control part 11 is configured to cooperate DC power supplied from a plurality of DC power supplies, and to supply to a load circuit.
  • the plurality of DC circuit breakers 12 are connected between an output terminal of the cooperation control part 11 and the branch circuits of plural systems, respectively.
  • Each of the DC circuit breakers 12 has an output for being connected with a branch circuit.
  • a distribution circuit 10 includes the plurality of DC circuit breakers 12.
  • a DC-DC converter 13, a DC-DC converter 14, a DC-DC converter 15 and an AC-DC converter 16 are included in the DC distribution board 1.
  • the DC-DC converter 13 is configured to convert DC voltage generated by a photovoltaic facility 50 into DC voltage of a predetermined voltage value.
  • the DC-DC converter 14 is configured to convert DC voltage generated by a fuel cell 51 into DC voltage of the predetermined voltage value.
  • the DC-DC converter 15 is configured to convert DC voltage supplied from a storage battery 52 into DC voltage of the predetermined voltage value.
  • the storage battery 52 is not only configured to be charged by other DC power supplies, but also configured to be discharged when said other DC power supplies stop feeding power.
  • the AC-DC converter 16 is configured to convert AC power supplied from commercial AC power supply 100 into DC. Each outputs of the DC-DC converters 13 ⁇ 15 and the AC-DC converter 16 is connected with the cooperation control part 11 through DC power line LI.
  • the photovoltaic facility 50, the fuel cell 51, the storage battery 52, the DC-DC converters 13, 14, 15 which are configured to convert output of the corresponding DC power supply into the predetermined voltage value, and the AC-DC converter 16 which is configured to convert AC input from the commercial AC power supply 100 into DC, are included as at least one DC power supply.
  • the bidirectional power feeding device 2 includes a DC-DC converter (vehicle side feeding part) 21, a DC-DC converter (distribution board side feeding part) 22, an interface part 24, a communication part 25 and a control part 23.
  • the DC-DC converter 21 is configured to convert DC power supplied from the DC circuit breaker 12 through a DC power line L2 into DC power of voltage value corresponding to the electric vehicle 60, and to supply to the electric vehicle 60.
  • the DC-DC converter 22 is configured to convert the voltage value of DC voltage supplied from the electric vehicle 60, and to output to the DC power line LI.
  • the interface part 24 is configured to transmit signals to and from the control device 3.
  • the communication part 25 is configured to communicate with the communication circuit 64 of the electric vehicle 60 through a communication line L4.
  • the control part 23 is configured to control the operation of the DC-DC converters 21, 22 based on signals supplied from the control device 3 or the electric vehicle 60.
  • the signal which is transferred between the communication part 25 of the bidirectional power feeding device 2 and the communication circuit 64 of the electric vehicle 60, is transmitted through the dedicated communication line L4 incorporated in the charging cable CA.
  • the signal may be superimposed on and transmitted through a power line L3 by way of power line communication.
  • the signal may be transmitted by way of short distance wireless communication.
  • the control device 3 has a function that can control amount of DC power fed from the DC distribution board 1.
  • the control device 3 is configured to control each electric power fed from the DC-DC converter 13-15 and the AC-DC converter 16 individually, thereby determines the feed ratio between the plurality of DC power supplies.
  • the control device 3 also has a function that can supply the bidirectional power feeding device 2 with information about power feeding capacities of the plurality of the DC power supplies.
  • the bidirectional power feeding device 2 is configured to control, based on the information about the power feeding capacities supplied from the control device 3, the DC-DC converter 21, thereby control DC power fed to the electric vehicle 60 so that the DC power fed to the electric vehicle 60 does not exceed the power feeding capacities of the DC power supplies.
  • the setting/displaying device 4 includes a liquid-crystal display monitor with touch panel.
  • the setting/displaying device 4 is configured to display the feeding condition of the DC power supplies on the screen.
  • touch operations of operation buttons displayed on the screen a variety of setting conditions can be set to the control device 3 through the setting/displaying device 4.
  • the control device 3 compares the power from the DC power supplies (a supply power) with the power required for the branch circuit side (a required power). If the supply power from the DC power supplies is higher than the required power, the control device 3 supplies the bidirectional power feeding device 2 with a switching signal for switching the operation of the bidirectional power feeding device 2 to the charging operation, thereby the control device 3 makes the bidirectional power feeding device 2 feed power to the electric vehicle 60. Thus, the control device 3 makes the bidirectional power feeding_device 2 charge the battery 62 of the electric vehicle 60 preferentially. After completion of the charge of the battery 62, the control device 3 performs to charge the storage battery 52 by use of other DC power supplies.
  • the control device 3 may be configured, after completion of the charge of the storage battery 52, to convert DC power supplied from the DC power supplies into AC power through a DC-AC converter (not shown in figure) and to supply to AC devices. On the other hand, if the supply power from the DC power supplies is lower than the required power, the control device 3 first makes the storage battery 52 discharge. After the discharge of the storage battery 52, the control device 3 supplies the bidirectional power feeding device 2 with a switching signal for switching the operation of the bidirectional power feeding device 2 to the feeding operation, thereby the control device 3 makes the bidirectional power feeding device 2 feed the DC distribution board 1 side with DC power discharged by the battery 62 of the electric vehicle 60. That is, the present embodiment is configured to switch the operation of the bidirectional power feeding device 2 to the feeding operation if the supply power from the DC power supply is lower than the required power.
  • the required power is, for example, a total amount of electric power required for the operation of loads connected to the distribution circuit 10.
  • the required power may be set to the control device 3 through an external setting device.
  • the required power is set to the control device 3 via a home server which is configured to manage the operation of the loads.
  • the home server is connected with a plurality of loads each of which is connected to the outputs of the distribution circuit 10.
  • Each loads is configured to provide the home server with information about electric power necessary for its own operation.
  • the home server manages the information provided from the loads, and calculates the total amount of electric power required for the loads.
  • the home server sends the total amount, as the required power, to the control device 3.
  • the control part 23 of the bidirectional power feeding device 2 makes the communication part 25 supply the electric vehicle 60 side with a charge information sending request.
  • the charge information sending request is a request for sending charge information about charging voltage and charging current.
  • the charge-discharge control circuit 65 makes the communication circuit 64 supply the bidirectional power feeding device 2 with the charge information about charging voltage and charging current of own vehicle.
  • the control part 23 of the bidirectional power feeding device 2 decides that whether power feeding from the DC distribution board 1 is possible or not based on both the charge information received by the communication part 25 and the power feeding capacities of the DC power supplies obtained from the control device 3 through the interface part 24. And then, the control part 23 controls output of the DC'DC converter 21, with a current value possible to supply and with the voltage value requested by the electric vehicle 60 side, thereby feeds power to the electric vehicle 60 side.
  • the photovoltaic facility 50, the fuel cell 51, the storage battery 52, and a DC power supply obtained by converting the AC output from the commercial AC power supply 100 into DC through the AC-DC converter 16, are used as DC power supplies for supplying the DC distribution board 1 with DC power.
  • the control device 3 automatically performs a processing of selecting at least one DC power supply for feeding power to the electrical vehicle 60 from among the plurality of the DC power supplies.
  • power fed from the AC-DC converter 16 can be set to the control device 3 through the setting/displaying device 4. For example, upper limit of the power fed from the AC-DC converter 16 is set to the control device 3 through the setting/displaying device 4.
  • the control device 3 decides that possible feeding power to the electric vehicle 60 is 3000 VA.
  • the control device 3 controls the DC-DC converter 13 and the DC-DC converter 15, and performs power feeding to the electric vehicle 60 in the condition that the charging voltage is 300 V and the charging current is 10 A, by using the photovoltaic facility 50 and the storage battery 52 as power supplies.
  • the control device 3 decides that the possible feeding power to the electric vehicle 60 is 1000 VA, which corresponds to the power feeding capacity of the storage battery 52. Then, the control device 3 controls the DC-DC converter 15, and performs power feeding to the electric vehicle 60 in the condition that the charging voltage is 300 V and the charging current is 3.3 A, by using the storage battery 52 as a power supply.
  • control device 3 is configured to automatically select at least one optimum DC power supply based on a prehminarily-configured selection rule.
  • what kind of DC power supply is preferentially used for feeding power can be set to the control device 3 by using the setting/displaying device 4.
  • DC power is supplied from the DC distribution board 1 to the electric vehicle 60 side as the above described way, and the battery 62 is charged through the charge-discharge circuit 63 of the electric vehicle 60.
  • the control device 3 sends the switching signal to the electric vehicle 60 through the bidirectional power feeding device 2.
  • the charge-discharge circuit 63 of the electric vehicle 60 makes the battery 62 discharge, thereby DC power is supplied from the battery 62 to the DC distribution board 1 side.
  • the present power feeding system is to both charge the electric vehicle 60 and feed power to the loads in the house H, by using the fuel cell 51 and the storage battery 52 as power supplies.
  • the control device 3 If the power feeding capacity of combination of the fuel cell 51 and the storage battery 52 is lower than the power required for the loads in the house H, the control device 3 outputs the switching signal, which makes the operation of the bidirectional power feeding device 2 change from the charging operation for charging the battery 62 of the electric vehicle 60 to the discharging operation (the feeding operation) for discharging the battery 62, to the bidirectional power feeding device 2.
  • the bidirectional power feeding device 2 sends this switching signal to the electric vehicle 60.
  • the charge -discharge control circuit 65 of the electric vehicle 60 makes the charge-discharge circuit 63 perform the discharging operation (the feeding operation) based on the switching signal received by the communication circuit 64, and thereby DC power stored in the battery 62 is discharged to the bidirectional power feeding device 2 through the power line L3.
  • the control part 23 in accordance with the switching signal input from the control device 3, not only makes the operation of the DC-DC converter 21 stop, but also makes the DC-DC converter 22 convert DC voltage supplied from the electric vehicle 60 (for example, 300 V) into a transmission voltage value in conformity with a power line of the house (for example, 350 V) and to output to the DC power line LI. Therefore, the present power feeding system can supply the loads in the house H with DC power by using the battery 62 of the electric vehicle 60 as a power supply.
  • the control device 3 sends the setting information about the planed running distance to the electric vehicle 60 through the bidirectional power feeding device 2.
  • the charge-discharge control circuit 65 of the electric vehicle 60 decides a necessary battery level which is required for driving the planed running distance based on the setting information supplied from the bidirectional power feeding device 2. After starting the discharge of the battery 62 in accordance with the switching signal input from the bidirectional power feeding device 2, the charge -discharge control circuit 65 compares a remaining battery level of the battery 62 with the necessary battery level.
  • the charge-discharge control circuit 65 automatically controls the charge-discharge circuit 63 to stop the discharge of the battery 62. Therefore, the battery level necessary for driving the planed running distance can be ensured.
  • the charge-discharge control circuit 65 is configured, when the discharge of the battery 62 is stopped, to make the communication circuit 64 send a discharge stop signal for reporting the stop of discharge to the bidirectional power feeding device 2.
  • the bidirectional power feeding device 2 makes the operation of the DC-DC converter 22 stop as well as makes the interface part 24 send the discharge stop signal to the control device 3.
  • the control device 3 receives the discharge stop signal, in order to compensate the shortfall in power caused by the stop of discharge of the electric vehicle 60, the control device 3 makes the AC-DC converter 16 work, and thereby the control device 3 makes the AC-DC converter 16 convert AC power supplied from the commercial AC power 100 into DC power, and to supply the storage battery 52 and the loads with the DC power.
  • the storage battery 52 may be charged by DC power discharged by the battery 62 of the electric vehicle 60.
  • DC power stored in the battery 62 of the electric vehicle 60 can be used effectively by the loads in the house H.
  • the bidirectional power feeding device 2 includes two DC-DC converters 21, 22.
  • the DC-DC converter 21 is configured to perform voltage conversion of DC power supplied from the house side to supply to the electric vehicle 60 side when charging.
  • the DC-DC converter 22 is configured to perform conversion of DC power supplied from the electric vehicle 60 to supply the house side with the DC power when discharging.
  • the bidirectional power feeding device 2 may include one DC-DC converter 27 which is compatible with both the charge from the house side and the discharge from the vehicle side.
  • the DC-DC converter 27 is so configured that the operation of which is controlled by a control signal supplied from the control part 23.
  • the DC-DC converter 27 is configured, when charging, to perform voltage conversion of the DC power supplied through a branch breaker (DC circuit breaker) 12 to supply to the electric vehicle 60 side.
  • the DC-DC converter 27 is also configured, when discharging, to perform the conversion of the voltage value of the DC power supplied from the electric vehicle 60 to supply to the house side (the cooperation control part 11).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)

Abstract

A control device 3 is configured to generate a switching signal for changing the operation of the bidirectional power feeding device 2 to either a charging operation or a feeding operation based on both power supplied from a DC power supply and power required for a distribution circuit 10 side. A bidirectional power feeding device 2 comprises: a control part 23 configured, based on the switching signal, to make the electric vehicle 60 change its operation to either a charging operation for charging the battery 62 or a feeding operation for supplying the DC distribution board 1 with DC power discharged from the battery 62; a DC-DC converter 21 configured to convert the voltage value of DC power from the DC distribution board 1 and to supply to the battery 62 of the electric vehicle 60; and a DC-DC converter 22 configured to convert the voltage value of DC power from the battery 62 of the electric vehicle 60 to supply to the DC distribution board 1.

Description

DESCRIPTION
POWER FEED SYSTEM FOR ELECTRIC VEHICLE
TECHNICAL FIELD
[0001] The invention relates generally to a power feeding system for electric vehicle.
BACKGROUND ART
[0002] In recent years, electric vehicle such as Plug-in Hybrid Vehicle (PHV) or Battery Electric Vehicle (BEV) has been developed. As a way of charging the electric vehicle, it has been considered to feed the electric vehicle with the commercial AC (alternating current) power through an outlet of a house thereby charge the electric vehicle.
[0003] Besides, it has been examined to supply electrical apparatuses in a house with electric power by discharging a battery of the electric vehicle, if a power failure occurs while supplying the electric vehicle with the commercial AC power to charge the battery (For example, refer to Japanese Patent Application Laid-Open No. 2006-158084).
[0004] In the system disclosed in the above patent application, when charging the electric vehicle, commercial AC power is supplied to the electric vehicle and the AC is converted into DC (direct current) within the electric vehicle to charge the battery. Therefore, there is such a problem that conversion loss generates when converting AC into DC. Similarly, when discharging the electric vehicle, the DC power stored in the battery is converted into AC power and is supplied to the house side. Therefore, there is the problem that conversion loss generates when converting DC into AC. DISCLOSURE OF INVENTION
[0005] It is an object of the present invention to provide a power feeding system for electric vehicle which can skip the step of AC-DC conversion and/or DC-AC conversion when charging a battery of an electric vehicle and/or when discharging the battery to feed power to a house, and thereby efficiently uses electric power.
[0006] In order to achieve the above object, the present invention comprises- a DC distribution board comprising a distribution circuit, said distribution circuit being configured to distribute DC power from at least one DC power supply to a plurality of outputs," a bidirectional power feeding device configured to perform a charging operation for feeding a battery of an electric vehicle with DC power from the DC distribution board, and a feeding operation for supplying the DC distribution board with DC power from the battery of the electric vehicle; and a control device configured to generate a switching signal for changing the operation of the bidirectional power feeding device to either the charging operation or the feeding operation based on both power supplied from said at least one DC power supply and power required for the distribution circuit side. The bidirectional power feeding device comprises" a control part configured to make the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device; a vehicle side feeding part configured to supply the electric vehicle with DC power from the DC distribution board when the electric vehicle is charged; and a distribution board side feeding part configured to supply the DC distribution board with DC power from the electric vehicle when the electric vehicle discharges.
[0007] According to the present invention, when charging the battery of the electric vehicle, DC power is supplied from the DC distribution board to the electric vehicle through the bidirectional power feeding device. Therefore, there is no need to convert AC into DC in the electric vehicle side. For this reason, conversion loss does not generate for converting AC into DC. In addition, when discharging the battery of the electric vehicle thereby feeding power from the electric vehicle side, the bidirectional power feeding device directly supplies the DC distribution board with DC power stored in the battery of the electric vehicle. Therefore, there is no need to convert DC power supplied from the electric vehicle into AC power. For this reason, conversion loss does not generate for converting DC into AC. Therefore, electric power can be used efficiently.
[0008] In an embodiment, the DC distribution board is arranged in a building. The electric vehicle is further equipped with a charge -discharge part for charging and discharging the battery, and a charge -discharge control part for controlling the operation of the charge -discharge part. The bidirectional power feeding device is configured to supply the charge-discharge part of the electric vehicle with DC power supplied from the DC distribution board when the charging operation, and configured to supply the DC distribution board with DC power fed from the charge -discharge part of the electric vehicle when the feeding operation. The control part of the bidirectional power feeding device is configured to, via the charge -discharge control part of the electric vehicle, make the charge-discharge control part of the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device.
[0009] In an embodiment, said at least one DC power supply comprises a storage battery, said storage battery being configured to be charged by DC power supplied from other DC power supply and configured to discharge when said other DC power supply stops feeding power. The storage battery is configured to be charged by DC power supplied from the distribution board side feeding part when the electric vehicle discharges.
[0010] According to this embodiment, DC power discharged from the battery of the electric vehicle can be stored in the storage battery.
BRIEF DESCRIPTION OF DRAWINGS
[0011] Preferred embodiments of the invention will now be described in further details. Other features and advantages of the present invention will become better understood with regard to the following detailed description and accompanying drawings where^
FIG. 1 is a diagram showing a system structure of an embodiment of the present invention."
FIG. 2 is a diagram showing a system structure of another embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0012] An embodiment of the present invention is described below based on the attached figure.
[0013] The embodiment of the power feeding system for electric vehicle is not only configured to supply an electric vehicle, such as a Plug-in Hybrid Vehicle (PHV) or a Battery Electric Vehicle (BEV), with DC power to charge a battery of the electric vehicle, but also configured to supply house side with electric power stored in the battery of the electric vehicle by making the battery of the electric vehicle discharge when shortage of electricity occurs at the house side. In this embodiment, such a configuration that a power feed ng system for electric vehicle is applied to a detached house is explained. However, as a matter of course, a power feeding system for electric vehicle can be applied to such as a collective housing, a business office or another building.
[0014] Fig. 1 shows a schematic diagram of the power feeding system for electric vehicle. The power feeding system for electric vehicle includes a DC distribution board 1, a bidirectional power feeding device 2, a control device 3, and a setting/displaying device 4. The DC distribution board 1 is arranged at a house H, and is configured to distribute DC power supplied from DC power supply to branch circuits arranged in the house H. The bidirectional power feed ng device 2 is configured to perform a charging operation for feeding a battery of an electric vehicle with DC power from the DC distribution board, and a feeding operation for supplying the DC distribution board with DC power from the battery of the electric vehicle. For example, the bidirectional power feeding device 2 is configured to perform either a charging operation or a feeding operation. The bidirectional power feeding device 2 feeds a charge -discharge circuit 63 of an electric vehicle 60 with DC power supplied from the DC distribution board 1 in the charging operation. The bidirectional power feeding device 2 supplies the DC distribution board 1 with DC power fed from the charge -discharge circuit 63 of the electric vehicle 60 in the feeding operation.
[0015] The electric vehicle 60 includes a connector 61, a battery 62 such as a lithium-ion battery, the charge -discharge circuit 63, a communication circuit 64 and a charge -discharge control circuit 65. The connector 61 is configured to be detachably attached to a feed connector 26. Here, the feed connector 26 is provided at the end of a charging cable CA led out from the bidirectional power feeding device 2. The charge -discharge circuit 63 is configured to charge and discharge the battery 62. The communication circuit 64 is configured to communicate with the bidirectional power feeding device 2. The charge -discharge control circuit 65 is configured, based on a switching signal supplied from the bidirectional power feeding device 2 and received by the communication circuit 64, to change the operation of the charge-discharge circuit 63 to either a charging operation or a feeding operation.
[0016] The DC distribution board 1 is in conformity with 300 V class DC voltage. A cooperation control part 11 and a plurality of DC circuit breakers 12 are embedded in the DC distribution board 1. The cooperation control part 11 is configured to cooperate DC power supplied from a plurality of DC power supplies, and to supply to a load circuit. The plurality of DC circuit breakers 12 are connected between an output terminal of the cooperation control part 11 and the branch circuits of plural systems, respectively. Each of the DC circuit breakers 12 has an output for being connected with a branch circuit. In this embod ment, a distribution circuit 10 includes the plurality of DC circuit breakers 12. A DC-DC converter 13, a DC-DC converter 14, a DC-DC converter 15 and an AC-DC converter 16 are included in the DC distribution board 1. The DC-DC converter 13 is configured to convert DC voltage generated by a photovoltaic facility 50 into DC voltage of a predetermined voltage value. The DC-DC converter 14 is configured to convert DC voltage generated by a fuel cell 51 into DC voltage of the predetermined voltage value. The DC-DC converter 15 is configured to convert DC voltage supplied from a storage battery 52 into DC voltage of the predetermined voltage value. Here, the storage battery 52 is not only configured to be charged by other DC power supplies, but also configured to be discharged when said other DC power supplies stop feeding power. The AC-DC converter 16 is configured to convert AC power supplied from commercial AC power supply 100 into DC. Each outputs of the DC-DC converters 13~15 and the AC-DC converter 16 is connected with the cooperation control part 11 through DC power line LI. In the present embodiment, the photovoltaic facility 50, the fuel cell 51, the storage battery 52, the DC-DC converters 13, 14, 15 which are configured to convert output of the corresponding DC power supply into the predetermined voltage value, and the AC-DC converter 16 which is configured to convert AC input from the commercial AC power supply 100 into DC, are included as at least one DC power supply.
[0017] The bidirectional power feeding device 2 includes a DC-DC converter (vehicle side feeding part) 21, a DC-DC converter (distribution board side feeding part) 22, an interface part 24, a communication part 25 and a control part 23. The DC-DC converter 21 is configured to convert DC power supplied from the DC circuit breaker 12 through a DC power line L2 into DC power of voltage value corresponding to the electric vehicle 60, and to supply to the electric vehicle 60. The DC-DC converter 22 is configured to convert the voltage value of DC voltage supplied from the electric vehicle 60, and to output to the DC power line LI. The interface part 24 is configured to transmit signals to and from the control device 3. The communication part 25 is configured to communicate with the communication circuit 64 of the electric vehicle 60 through a communication line L4. The control part 23 is configured to control the operation of the DC-DC converters 21, 22 based on signals supplied from the control device 3 or the electric vehicle 60. In the present embodiment, the signal, which is transferred between the communication part 25 of the bidirectional power feeding device 2 and the communication circuit 64 of the electric vehicle 60, is transmitted through the dedicated communication line L4 incorporated in the charging cable CA. However, the signal may be superimposed on and transmitted through a power line L3 by way of power line communication. The signal may be transmitted by way of short distance wireless communication.
[0018] The control device 3 has a function that can control amount of DC power fed from the DC distribution board 1. The control device 3 is configured to control each electric power fed from the DC-DC converter 13-15 and the AC-DC converter 16 individually, thereby determines the feed ratio between the plurality of DC power supplies. The control device 3 also has a function that can supply the bidirectional power feeding device 2 with information about power feeding capacities of the plurality of the DC power supplies. The bidirectional power feeding device 2 is configured to control, based on the information about the power feeding capacities supplied from the control device 3, the DC-DC converter 21, thereby control DC power fed to the electric vehicle 60 so that the DC power fed to the electric vehicle 60 does not exceed the power feeding capacities of the DC power supplies.
[0019] The setting/displaying device 4 includes a liquid-crystal display monitor with touch panel. The setting/displaying device 4 is configured to display the feeding condition of the DC power supplies on the screen. In addition, by the touch operations of operation buttons displayed on the screen, a variety of setting conditions can be set to the control device 3 through the setting/displaying device 4.
[OO2O] Now, charge/discharge operation of the electric vehicle 60 by using the present power feeding system is explained.
[0021] The control device 3 compares the power from the DC power supplies (a supply power) with the power required for the branch circuit side (a required power). If the supply power from the DC power supplies is higher than the required power, the control device 3 supplies the bidirectional power feeding device 2 with a switching signal for switching the operation of the bidirectional power feeding device 2 to the charging operation, thereby the control device 3 makes the bidirectional power feeding device 2 feed power to the electric vehicle 60. Thus, the control device 3 makes the bidirectional power feeding_device 2 charge the battery 62 of the electric vehicle 60 preferentially. After completion of the charge of the battery 62, the control device 3 performs to charge the storage battery 52 by use of other DC power supplies. The control device 3 may be configured, after completion of the charge of the storage battery 52, to convert DC power supplied from the DC power supplies into AC power through a DC-AC converter (not shown in figure) and to supply to AC devices. On the other hand, if the supply power from the DC power supplies is lower than the required power, the control device 3 first makes the storage battery 52 discharge. After the discharge of the storage battery 52, the control device 3 supplies the bidirectional power feeding device 2 with a switching signal for switching the operation of the bidirectional power feeding device 2 to the feeding operation, thereby the control device 3 makes the bidirectional power feeding device 2 feed the DC distribution board 1 side with DC power discharged by the battery 62 of the electric vehicle 60. That is, the present embodiment is configured to switch the operation of the bidirectional power feeding device 2 to the feeding operation if the supply power from the DC power supply is lower than the required power.
[0022] In this embodiment, the required power is, for example, a total amount of electric power required for the operation of loads connected to the distribution circuit 10. The required power may be set to the control device 3 through an external setting device. For example, the required power is set to the control device 3 via a home server which is configured to manage the operation of the loads. In this case, the home server is connected with a plurality of loads each of which is connected to the outputs of the distribution circuit 10. Each loads is configured to provide the home server with information about electric power necessary for its own operation. The home server manages the information provided from the loads, and calculates the total amount of electric power required for the loads. The home server sends the total amount, as the required power, to the control device 3.
[0023] In the case of charging the electric vehicle 60, when the feed connector 26 of the charging cable CA led out from the bidirectional power feeding device 2 is connected to the connector 61 of the electric vehicle 60, the control part 23 of the bidirectional power feeding device 2 makes the communication part 25 supply the electric vehicle 60 side with a charge information sending request. Here, the charge information sending request is a request for sending charge information about charging voltage and charging current. When the communication circuit 64 of the electric vehicle 60 receives the charge information sending request sent from the bidirectional power feeding device 2, the charge-discharge control circuit 65 makes the communication circuit 64 supply the bidirectional power feeding device 2 with the charge information about charging voltage and charging current of own vehicle. After the charge information being received by the communication part 25 of the bidirectional power feeding device 2, the control part 23 of the bidirectional power feeding device 2 decides that whether power feeding from the DC distribution board 1 is possible or not based on both the charge information received by the communication part 25 and the power feeding capacities of the DC power supplies obtained from the control device 3 through the interface part 24. And then, the control part 23 controls output of the DC'DC converter 21, with a current value possible to supply and with the voltage value requested by the electric vehicle 60 side, thereby feeds power to the electric vehicle 60 side.
[0024] In the present embodiment, the photovoltaic facility 50, the fuel cell 51, the storage battery 52, and a DC power supply obtained by converting the AC output from the commercial AC power supply 100 into DC through the AC-DC converter 16, are used as DC power supplies for supplying the DC distribution board 1 with DC power. In the present embodiment, the control device 3 automatically performs a processing of selecting at least one DC power supply for feeding power to the electrical vehicle 60 from among the plurality of the DC power supplies. In this embodiment, power fed from the AC-DC converter 16 can be set to the control device 3 through the setting/displaying device 4. For example, upper limit of the power fed from the AC-DC converter 16 is set to the control device 3 through the setting/displaying device 4.
[0025] For example, in the case of charging the battery 62 of the electric vehicle 60 side, it is assumed that electric power fed from the AC-DC converter 16, which is configured to convert the AC input of the commercial AC power supply 100 into DC, is set at zero by use of the setting/displaying device 4, the sunlight exists (that is, power generation is performed by the photovoltaic facility 50), and there exists electric power stored in the storage battery 52. In addition, assuming that the electric vehicle 60 sends, in response to the charge information sending request, such a charge information that the charging voltage is DC 300 V and the charging current is 20 A to the bidirectional power feeding device 2. Then, this charge information is further sent from the bidirectional power feeding device 2 to the control device 3. Here, the control device 3 is configured to grasp the power feeding capacity of each DC power supplies. Assuming that the power generation of the photovoltaic facility 50 is 2000 VA, the power generation of the fuel cell 51 is 0 VA, the power feeding capacity of the storage battery 52 is 1000 VA, and no power is consumed by other electric devices in the house H. In this case, the control device 3 decides that possible feeding power to the electric vehicle 60 is 3000 VA. The control device 3 controls the DC-DC converter 13 and the DC-DC converter 15, and performs power feeding to the electric vehicle 60 in the condition that the charging voltage is 300 V and the charging current is 10 A, by using the photovoltaic facility 50 and the storage battery 52 as power supplies.
[0026] Next, assuming that the sunlight does not exist while the other conditions are same with the above case. In this case, the control device 3 decides that the possible feeding power to the electric vehicle 60 is 1000 VA, which corresponds to the power feeding capacity of the storage battery 52. Then, the control device 3 controls the DC-DC converter 15, and performs power feeding to the electric vehicle 60 in the condition that the charging voltage is 300 V and the charging current is 3.3 A, by using the storage battery 52 as a power supply.
[0027] Next, assuming that electric power fed from the AC-DC converter 16, which is configured to convert the AC input of the commercial AC power supply 100 into DC, is set at 1000 VA, the sunlight does not exist, and there exists electric power stored in the storage battery 52 and its power feeding capacity is 1000 VA. In this case, the control device 3 decides that the possible feeding power to the electric vehicle 60 is 2000 VA. Then, the control device 3 controls the DC-DC converter 15 and the AC-DC converter 16, and performs power feeding to the electric vehicle 60 in the condition that the charging voltage is 300 V and the charging current is 6.6 A, by using the AC-DC converter 16, which is configured to convert the AC input of the commercial AC power supply 100 into DC, and the storage battery 52 as power supplies.
[0028] Here, the control device 3 is configured to automatically select at least one optimum DC power supply based on a prehminarily-configured selection rule. However, what kind of DC power supply is preferentially used for feeding power can be set to the control device 3 by using the setting/displaying device 4.
[0029] DC power is supplied from the DC distribution board 1 to the electric vehicle 60 side as the above described way, and the battery 62 is charged through the charge-discharge circuit 63 of the electric vehicle 60. Here, if power feeding from DC power supply is stopped, the control device 3 sends the switching signal to the electric vehicle 60 through the bidirectional power feeding device 2. And then, the charge-discharge circuit 63 of the electric vehicle 60 makes the battery 62 discharge, thereby DC power is supplied from the battery 62 to the DC distribution board 1 side.
[0030] For example, assuming such a condition that during nighttime etc., the electric vehicle 60 is being charged, power conversion of the commercial AC power supply 100 is set at minimum by using the setting/displaying device 4, and the planed running distance for the next day of the electric vehicle 60 is set at 50km. Because the photovoltaic facility 50 does not generate electric power during nighttime, the present power feeding system is to both charge the electric vehicle 60 and feed power to the loads in the house H, by using the fuel cell 51 and the storage battery 52 as power supplies. If the power feeding capacity of combination of the fuel cell 51 and the storage battery 52 is lower than the power required for the loads in the house H, the control device 3 outputs the switching signal, which makes the operation of the bidirectional power feeding device 2 change from the charging operation for charging the battery 62 of the electric vehicle 60 to the discharging operation (the feeding operation) for discharging the battery 62, to the bidirectional power feeding device 2. The bidirectional power feeding device 2 sends this switching signal to the electric vehicle 60. Then, the charge -discharge control circuit 65 of the electric vehicle 60 makes the charge-discharge circuit 63 perform the discharging operation (the feeding operation) based on the switching signal received by the communication circuit 64, and thereby DC power stored in the battery 62 is discharged to the bidirectional power feeding device 2 through the power line L3. In the bidirectional power feeding device 2, in this time, in accordance with the switching signal input from the control device 3, the control part 23 not only makes the operation of the DC-DC converter 21 stop, but also makes the DC-DC converter 22 convert DC voltage supplied from the electric vehicle 60 (for example, 300 V) into a transmission voltage value in conformity with a power line of the house (for example, 350 V) and to output to the DC power line LI. Therefore, the present power feeding system can supply the loads in the house H with DC power by using the battery 62 of the electric vehicle 60 as a power supply.
[0031] By the way, when the planed running distance for the next day is set by using the setting/displaying device 4, the control device 3 sends the setting information about the planed running distance to the electric vehicle 60 through the bidirectional power feeding device 2. The charge-discharge control circuit 65 of the electric vehicle 60 decides a necessary battery level which is required for driving the planed running distance based on the setting information supplied from the bidirectional power feeding device 2. After starting the discharge of the battery 62 in accordance with the switching signal input from the bidirectional power feeding device 2, the charge -discharge control circuit 65 compares a remaining battery level of the battery 62 with the necessary battery level. If the remaining battery level of the battery 62 is lower than the necessary battery level, the charge-discharge control circuit 65 automatically controls the charge-discharge circuit 63 to stop the discharge of the battery 62. Therefore, the battery level necessary for driving the planed running distance can be ensured.
[0032] In addition, the charge-discharge control circuit 65 is configured, when the discharge of the battery 62 is stopped, to make the communication circuit 64 send a discharge stop signal for reporting the stop of discharge to the bidirectional power feeding device 2. When receiving the discharge stop signal, the bidirectional power feeding device 2 makes the operation of the DC-DC converter 22 stop as well as makes the interface part 24 send the discharge stop signal to the control device 3. When the control device 3 receiving the discharge stop signal, in order to compensate the shortfall in power caused by the stop of discharge of the electric vehicle 60, the control device 3 makes the AC-DC converter 16 work, and thereby the control device 3 makes the AC-DC converter 16 convert AC power supplied from the commercial AC power 100 into DC power, and to supply the storage battery 52 and the loads with the DC power.
[0033] In the present power feeding system, even if an excess current flows and/or an electrical leakage occurs when discharging the battery 62 of the electric vehicle 60 to supply the DC electricity distribution system of the house H with the discharged power, the loads in the house H are to be protected by an earth leakage breaker (not shown in figure) and/or the DC circuit breakers 12 arranged in the DC distribution board 1.
[0034] As explained above, in this power feeding system for electric vehicle, when charging the battery 62 of the electric vehicle 60, DC power is supplied from the DC distribution board 1 to the electric vehicle 60 through the bidirectional power feeding device 2. Therefore, there is no need to convert AC into DC in the electric vehicle 60 side. For this reason, conversion loss for converting AC into DC does not generate. In addition, when discharging the battery 62 of the electric vehicle 60 to feed power from the electric vehicle 60 side, the bidirectional power feeding device 2 supplies the DC distribution board 1 with DC power stored in the battery 62 of the electric vehicle 60. Therefore, there is no need to convert DC power supplied from the electric vehicle 60 into AC power. For this reason, conversion loss for converting DC into AC does not generate. Therefore, electric power can be used efficiently.
[0035] In the above power feeding system for electric vehicle, the storage battery 52 may be charged by DC power discharged by the battery 62 of the electric vehicle 60. In this configuration, DC power stored in the battery 62 of the electric vehicle 60 can be used effectively by the loads in the house H.
[0036] In the above power feeding system for electric vehicle, the bidirectional power feeding device 2 includes two DC-DC converters 21, 22. The DC-DC converter 21 is configured to perform voltage conversion of DC power supplied from the house side to supply to the electric vehicle 60 side when charging. The DC-DC converter 22 is configured to perform conversion of DC power supplied from the electric vehicle 60 to supply the house side with the DC power when discharging. However, as shown in Fig. 2, the bidirectional power feeding device 2 may include one DC-DC converter 27 which is compatible with both the charge from the house side and the discharge from the vehicle side. The DC-DC converter 27 is so configured that the operation of which is controlled by a control signal supplied from the control part 23. The DC-DC converter 27 is configured, when charging, to perform voltage conversion of the DC power supplied through a branch breaker (DC circuit breaker) 12 to supply to the electric vehicle 60 side. The DC-DC converter 27 is also configured, when discharging, to perform the conversion of the voltage value of the DC power supplied from the electric vehicle 60 to supply to the house side (the cooperation control part 11).
[0037] Although the present invention has been described with reference to certain preferred embodiments, numerous modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of this invention, namely claims.

Claims

1. A power feeding system for electric vehicle comprising:
a DC distribution board comprising a distribution circuit, said distribution circuit being configured to distribute DC power from at least one DC power supply to a plurality of outputs."
a bidirectional power feeding device configured to perform a charging operation for feeding a battery of an electric vehicle with DC power from the DC distribution board, and a feeding operation for supplying the DC distribution board with DC power from the battery of the electric vehicle; and
a control device configured to generate a switching signal for changing the operation of the bidirectional power feeding device to either the charging operation or the feeding operation based on both power supplied from said at least one DC power supply and power required for the distribution circuit side,
wherein the bidirectional power feeding device comprises:
a control part configured to make the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device; a vehicle side feeding part configured to supply the electric vehicle with DC power from the DC distribution board when the electric vehicle is charged; and
a distribution board side feeding part configured to supply the DC distribution board with DC power from the electric vehicle when the electric vehicle discharges.
2. A power feeding system for electric vehicle as set forth in claim 1, wherein the DC distribution board is arranged in a building, wherein the electric vehicle is further equipped with a charge -discharge part for charging and discharging the battery, and a charge -discharge control part for controlling the operation of the charge-discharge part,
wherein the bidirectional power feeding device is configured to supply the charge-discharge part of the electric vehicle with DC power supplied from the DC distribution board when the charging operation, and configured to supply the DC distribution board with DC power fed from the charge -discharge part of the electric vehicle when the feeding operation, wherein the control part of the bidirectional power feeding device is configured to, via the charge -discharge control part of the electric vehicle, make the charge -discharge control part of the electric vehicle change its operation to either a charging operation of the battery or a feeding operation of the battery based on the switching signal generated by the control device.
3. A power feeding system for electric vehicle as set forth in claim 2, wherein said at least one DC power supply comprises a storage battery, said storage battery being configured to be charged by DC power supplied from other DC power supply and configured to discharge when said other DC power supply stops feeding power, and
wherein the storage battery is configured to be charged by DC power supplied from the distribution board side feeding part when the electric vehicle discharges.
PCT/JP2010/073842 2009-12-21 2010-12-20 Power feed system for electric vehicle WO2011078397A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020127015960A KR101437019B1 (en) 2009-12-21 2010-12-20 Power feed system for electric vehicle
CN201080058309.6A CN102668312B (en) 2009-12-21 2010-12-20 Power feed system for electric vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-289706 2009-12-21
JP2009289706A JP5724053B2 (en) 2009-12-21 2009-12-21 Electric vehicle power supply system

Publications (1)

Publication Number Publication Date
WO2011078397A1 true WO2011078397A1 (en) 2011-06-30

Family

ID=44195915

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/073842 WO2011078397A1 (en) 2009-12-21 2010-12-20 Power feed system for electric vehicle

Country Status (5)

Country Link
JP (1) JP5724053B2 (en)
KR (1) KR101437019B1 (en)
CN (1) CN102668312B (en)
TW (1) TWI417203B (en)
WO (1) WO2011078397A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014027246A3 (en) * 2012-08-16 2014-05-30 Robert Bosch Gmbh Dc building system with energy storage and control system
US20140327424A1 (en) * 2011-11-08 2014-11-06 Panasonic Corporation Power conversion device
EP2752331A4 (en) * 2011-08-25 2015-11-18 Toyota Motor Co Ltd Vehicle, charging system, and method for controlling vehicle
EP2882066A4 (en) * 2012-07-30 2016-05-25 Mitsubishi Electric Corp Charging/discharging device
US9673654B2 (en) 2011-07-15 2017-06-06 HYDRO-QUéBEC Multi-stage quick charging system
ITUB20160891A1 (en) * 2016-02-19 2017-08-19 Alfazero S P A CHARGING SYSTEM FOR A DIRECT CURRENT ELECTRIC VEHICLE
WO2019244029A1 (en) * 2018-06-20 2019-12-26 Aton S.R.L. System for the control of electric energy
CN114696395A (en) * 2020-12-31 2022-07-01 观致汽车有限公司 Storage battery power feed prevention method, electric vehicle, electronic device, and storage medium
US11708002B2 (en) 2020-08-03 2023-07-25 Cisco Technology, Inc. Power distribution and communications for electric vehicle
US11745613B2 (en) 2020-08-26 2023-09-05 Cisco Technology, Inc. System and method for electric vehicle charging and security
US11797350B2 (en) 2020-02-25 2023-10-24 Cisco Technology, Inc. Method and apparatus for providing data center functions for support of an electric vehicle based data center

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046557A (en) * 2011-08-26 2013-03-04 Sharp Corp Home discharge control device and home discharge control method
JP5626169B2 (en) * 2011-09-28 2014-11-19 三菱自動車工業株式会社 Power supply securing structure for power supply device startup
JP5776482B2 (en) * 2011-10-11 2015-09-09 トヨタ自動車株式会社 Electric vehicle
JP5794097B2 (en) * 2011-10-19 2015-10-14 三菱自動車工業株式会社 Power supply control device for power supply device
EP2624400A1 (en) * 2012-02-06 2013-08-07 ABB Technology AG Converter for a battery charging station
JP5550668B2 (en) * 2012-03-19 2014-07-16 本田技研工業株式会社 Power supply system
JP5991845B2 (en) * 2012-04-20 2016-09-14 トヨタホーム株式会社 Product information display system
JP5811941B2 (en) * 2012-04-25 2015-11-11 株式会社デンソー Power supply system
JP5433819B1 (en) * 2012-05-25 2014-03-05 パナソニック株式会社 In-vehicle power supply device and solar power generation device
JP2019092389A (en) * 2012-05-29 2019-06-13 三菱電機株式会社 Power supply switching device and power supply switching system
JP6108148B2 (en) * 2012-05-30 2017-04-05 日本電気株式会社 Information processing apparatus, information processing system, information processing system control method, information processing method, and information processing program
JP2014027856A (en) * 2012-07-30 2014-02-06 Mitsubishi Electric Corp System interconnection apparatus
JP5811287B2 (en) * 2012-11-05 2015-11-11 トヨタ自動車株式会社 vehicle
TWI479772B (en) * 2013-02-21 2015-04-01 台達電子工業股份有限公司 Charging system for electric vehicle and charging method thereof
JP6045450B2 (en) * 2013-07-02 2016-12-14 株式会社椿本チエイン Power control device
JP5780269B2 (en) * 2013-07-12 2015-09-16 トヨタ自動車株式会社 Power supply system and power receiving equipment
JP2015076977A (en) * 2013-10-09 2015-04-20 株式会社アイケイエス Distributed power system
JP5808474B2 (en) * 2014-12-04 2015-11-10 三菱電機株式会社 Charge / discharge system
CN104485656B (en) * 2014-12-11 2017-01-11 三峡大学 Important-load-containing DC (Direct Current) power distribution network into which electromobile can be flexibly connected
US10224727B2 (en) * 2015-06-30 2019-03-05 Dong-Sheng Li Multi-functional hub integrated with AC power supply
JP2018033314A (en) * 2016-04-05 2018-03-01 三菱重工業株式会社 Electric car and charger
CN106114247B (en) * 2016-04-27 2019-03-22 恒大法拉第未来智能汽车（广东）有限公司 Charging unit, charging method and vehicle
KR20180121105A (en) * 2017-04-28 2018-11-07 현대자동차주식회사 Apparatus and method for charging and discharging electric vehcile under smart grid environment
KR102074686B1 (en) * 2017-05-19 2020-02-07 엘에스산전 주식회사 A hybrid energy storage system
KR102144833B1 (en) * 2018-02-21 2020-08-14 주식회사 그리드위즈 Reverse power device for vehicle
CN108667127A (en) * 2018-05-08 2018-10-16 国网福建晋江市供电有限公司 A kind of power supply system and method for cell electric vehicle
CN109687546A (en) * 2018-12-22 2019-04-26 深圳市聚纵新能源科技有限公司 A kind of power gain charging control circuit and its control method
JP7290991B2 (en) * 2019-05-13 2023-06-14 ニチコン株式会社 V2H stand and power storage system equipped with the V2H stand
EP4122751A4 (en) * 2020-03-18 2024-05-08 Hitachi Ltd Power supply system
JP7470078B2 (en) 2021-03-26 2024-04-17 株式会社日立パワーソリューションズ Power supply system and power supply device
EP4152555A4 (en) 2021-07-29 2023-03-22 Contemporary Amperex Technology Co., Limited Charging and discharging device and battery charging method
KR102645452B1 (en) 2021-07-29 2024-03-12 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 Charge/discharge device, battery charging method, and charge/discharge system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224770A (en) * 1999-02-03 2000-08-11 Misawa Homes Co Ltd Building
JP2004282802A (en) * 2003-03-12 2004-10-07 Nitto Electric Works Ltd Distribution board
JP2008042999A (en) * 2006-08-02 2008-02-21 Matsushita Electric Works Ltd Power supply device
JP2008182851A (en) * 2007-01-25 2008-08-07 Chugoku Electric Power Co Inc:The Power storage apparatus and system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4538203B2 (en) * 2003-06-09 2010-09-08 トヨタ自動車株式会社 Energy management equipment
KR20080042999A (en) * 2006-11-13 2008-05-16 삼성전자주식회사 Liquid crystal display

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000224770A (en) * 1999-02-03 2000-08-11 Misawa Homes Co Ltd Building
JP2004282802A (en) * 2003-03-12 2004-10-07 Nitto Electric Works Ltd Distribution board
JP2008042999A (en) * 2006-08-02 2008-02-21 Matsushita Electric Works Ltd Power supply device
JP2008182851A (en) * 2007-01-25 2008-08-07 Chugoku Electric Power Co Inc:The Power storage apparatus and system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9673654B2 (en) 2011-07-15 2017-06-06 HYDRO-QUéBEC Multi-stage quick charging system
EP2752331A4 (en) * 2011-08-25 2015-11-18 Toyota Motor Co Ltd Vehicle, charging system, and method for controlling vehicle
US20140327424A1 (en) * 2011-11-08 2014-11-06 Panasonic Corporation Power conversion device
EP2779395A4 (en) * 2011-11-08 2016-01-06 Panasonic Ip Man Co Ltd Power conversion device
EP2882066A4 (en) * 2012-07-30 2016-05-25 Mitsubishi Electric Corp Charging/discharging device
US9937810B2 (en) 2012-08-16 2018-04-10 Robert Bosch Llc Charging and discharging of DC microgrid energy storage
CN104782014A (en) * 2012-08-16 2015-07-15 罗伯特·博世有限公司 DC building system with energy storage and control system
US10020656B2 (en) 2012-08-16 2018-07-10 Robert Bosch Llc Emergency load management using a DC microgrid during grid outage
WO2014027246A3 (en) * 2012-08-16 2014-05-30 Robert Bosch Gmbh Dc building system with energy storage and control system
WO2017141156A1 (en) * 2016-02-19 2017-08-24 Alfazero S.P.A. System and method for recharging an electric vehicle with direct current
ITUB20160891A1 (en) * 2016-02-19 2017-08-19 Alfazero S P A CHARGING SYSTEM FOR A DIRECT CURRENT ELECTRIC VEHICLE
WO2019244029A1 (en) * 2018-06-20 2019-12-26 Aton S.R.L. System for the control of electric energy
US11797350B2 (en) 2020-02-25 2023-10-24 Cisco Technology, Inc. Method and apparatus for providing data center functions for support of an electric vehicle based data center
US11708002B2 (en) 2020-08-03 2023-07-25 Cisco Technology, Inc. Power distribution and communications for electric vehicle
US11745613B2 (en) 2020-08-26 2023-09-05 Cisco Technology, Inc. System and method for electric vehicle charging and security
CN114696395A (en) * 2020-12-31 2022-07-01 观致汽车有限公司 Storage battery power feed prevention method, electric vehicle, electronic device, and storage medium

Also Published As

Publication number Publication date
JP5724053B2 (en) 2015-05-27
CN102668312A (en) 2012-09-12
TWI417203B (en) 2013-12-01
CN102668312B (en) 2015-05-06
TW201127666A (en) 2011-08-16
KR20120107969A (en) 2012-10-04
KR101437019B1 (en) 2014-09-02
JP2011130647A (en) 2011-06-30

Similar Documents

Publication Publication Date Title
KR101437019B1 (en) Power feed system for electric vehicle
KR101424021B1 (en) Electricity feeding device and electricity feeding system using the same
US11043835B2 (en) Method of using a minimum cost EVPV for vehicle-solar-grid integration
US20140320083A1 (en) Power converter
JP2013090560A (en) Dc power feeding system
US20220158464A1 (en) Ev charger with adaptable charging protocol
US20170179723A1 (en) Clustered energy-storing micro-grid system
JP2013081289A (en) Power controller
CN109274138B (en) Control method of mobile energy storage charging system of multifunctional electric automobile based on combination of multiple energy storage modules
EP2988394A1 (en) Connection monitoring device and battery utilization system
CN111845424A (en) Power control system of charger and corresponding power control unit
JP2024051003A (en) Power Conversion Systems
CN114161983B (en) Electric vehicle battery replacement system and charging method of battery pack
JP5909619B2 (en) Electric vehicle power supply system
JP5971601B2 (en) Electric vehicle power supply system
KR101215396B1 (en) Hybrid smart grid uninterruptible power supply using discharge current control
US20210194270A1 (en) Storage Battery Unit, Storage Battery Device and Hybrid-Typed Power Supply System
CN110190616B (en) Intelligent direct current power supply system and network
CN220754426U (en) Energy storage system and energy storage device
CN217789346U (en) Intelligent charging cabinet control device
KR102144833B1 (en) Reverse power device for vehicle
JP2020031484A (en) Power storage system and power conditioner
CN217553732U (en) Energy storage and charging integrated battery replacement station
CN212353679U (en) Power control system of charger and corresponding power control unit
CN111406352B (en) energy storage system

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080058309.6

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10839621

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 5156/CHENP/2012

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 20127015960

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 1201002673

Country of ref document: TH

122 Ep: pct application non-entry in european phase

Ref document number: 10839621

Country of ref document: EP

Kind code of ref document: A1