POWER CONTROL SYSTEM

• US 20120161701A1
• Filed: 09/20/2011
• Published: 06/28/2012
• Est. Priority Date: 12/28/2010
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KAWAMOTO, Shinya, OGURA, Yasuhiro, ENDO, Tamotsu
• Application Number:
  US13/237,156
• Publication Number:
  US 20120161701A1
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 53/00 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
• CPC Class Codes: B60L 53/50 Charging stations characterised by energy-storage or power-generation means
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 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]

Abstract

A power control system includes a house power controller and a vehicle power controller connected by a power cable. The house power controller includes a control signal generator; a switch that operates responsive to a control signal instructing a charged amount, and passes/stops AC power coming from a power distribution system; a selector switch that switches whether to send AC power to the power cable, or to output DC power from the power cable; and a power converter converting DC power from the selector switch into AC power, and sending AC power to the power distribution system. The vehicle power controller includes a battery storing DC power; a vehicle-side selector switch that switches whether to send DC power from the battery to the power cable, or to output AC power from the power cable; and a charger that charges the battery with AC power from the vehicle-side selector switch.

Claims

1. A power control system comprising:

a house power control device for controlling power on a house side;

a vehicle power control device for controlling power on a vehicle side; and

a power cable for transferring power between the house power control device and the vehicle power control device, wherein

the house power control device includes;

a control signal creation unit for creating a control signal;

a switch that opens and closes in response to the control signal instructing a charged amount, the control signal being sent from the control signal creation unit, thereby controls passing or stopping of AC power coming from a power distribution system;

a house-side selector switch that, in response to a control signal instructing charge/discharge, the control signal being sent from the control signal creation unit, switches whether to send the AC power, which comes from the switch, from a house to a vehicle through the power cable, or to output DC power, which comes from the vehicle, to a power distribution system side through the power cable; and

a power conversion system that, in response to a control signal instructing a discharged amount, the control signal being sent from the control signal generation unit, converts the DC power, which is outputted from the house-side selector switch, into AC power, and sends out the AC power to the power distribution system, and

the vehicle power control device includes;

a vehicle-mounted battery that stores DC power;

a vehicle-side selector switch that, in response to the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit, switches whether to send DC power, which comes from the vehicle-mounted battery, to the power cable, or to output the AC power, which comes from the power cable; and

a charger that charges the vehicle-mounted battery based on the AC power outputted from the vehicle-side selector switch.

2. The power control system according to claim 1, further comprising:

a communication cable that transfers information between the house power control device and the vehicle power control device, wherein

in response to the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit through the communication cable, the vehicle-side selector switch switches whether to send the DC power, which comes from the vehicle-mounted battery, to the power cable, or to output the AC power, which comes from the power cable.

3. The power control system according to claim 1, wherein

the house power control device further includes a house-side communication unit that wirelessly transmits the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit,

the vehicle power control device further includes a vehicle-side communication unit that wirelessly receives the control signal instructing the charge/discharge, the control signal being wirelessly sent from the house-side communication unit, and

in response to the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit through the house-side communication unit and the vehicle-side communication unit, the vehicle-side selector switch switches whether to send the DC power, which comes from the vehicle-mounted battery, to the power cable, or to output the AC power, which comes from the power cable.

4. The power control system according to claim 1, wherein

in response to a control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit while being superimposed on the AC power or DC power transferred by the power cable, the vehicle-side selector switch switches whether to send the DC power, which comes from the vehicle-mounted battery, to the power cable, or to output the AC power, which comes from the power cable.

5. The power control system according to claim 1, wherein

the house power control device further includes a DC-DC converter that, in response to the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit, converts a voltage of the DC power, which is outputted from the house-side selector switch, into a voltage corresponding to voltage by photovoltaics, and

the power conversion system converts the DC power, which is outputted from the DC-DC converter, into AC power, and sends out the AC power to the power distribution system.

6. The power control system according to claim 1, further comprising:

a smart meter that outputs a command corresponding to an instruction received by communication, wherein

the control signal creation unit creates the control signal in response to the command coming from the smart meter.

7. A power control system comprising:

a house power control device for controlling power on a house side;

a vehicle power control device for controlling power on a vehicle side; and

a power cable for transferring power between the house power control device and the vehicle power control device, wherein

the house power control device includes;

a control signal creation unit for creating a control signal;

a house-side selector switch that, in response to a control signal instructing charge/discharge, the control signal being sent from the control signal creation unit, switches whether to send AC power, which comes from a power distribution system, to the power cable, or to output DC power, which comes from the power cable; and

a power conversion system that, in response to a control signal instructing a discharged amount, the control signal being sent from the control signal generation unit, converts the DC power, which is outputted from the house-side selector switch, into AC power, and sends out the AC power to the power distribution system, and

the vehicle power control device includes;

a vehicle-mounted battery that stores DC power;

a vehicle-side selector switch that, in response to the control signal instructing the charge/discharge, the control signal being sent from the control signal creation unit, switches whether to send DC power, which comes from the vehicle-mounted battery, to the power cable, or to output the AC power, which comes from the power cable;

a charge controller that creates a charged amount control signal, which instructs a charged amount, in response to the control signal instructing a charged amount, the control signal being sent from the control signal creation unit, and to a signal indicating a battery residual amount, the signal being sent from the vehicle-mounted battery; and

a charger that charges the vehicle-mounted battery with a charged amount corresponding to the charged amount control signal coming from the charge controller based on the AC power outputted from the vehicle-side selector switch.

8. The power control system according to claim 7, further comprising:

a smart meter that outputs a command corresponding to an instruction received by communication, wherein

the control signal creation unit creates the control signal in response to the command coming from the smart meter.