Power supply and demand leveling system

• US 9,340,117 B2
• Filed: 07/29/2011
• Issued: 05/17/2016
• Est. Priority Date: 08/05/2010
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Original Assignee: Mitsubishi Corporation, Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Research Institute Incorporated
• Inventors: Momose, Nobuo, Kataniwa, Makoto, Okazaki, Yoshitaka, Shimura, Yuichiro, Tanaka, Hiroshi, Maejima, Hitoshi, Nakai, Yasuhiro, Kumazawa, Hiroyuki, Munaka, Tatsuji, Irie, Hiroshi
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US13/814,154
• Publication Number:
  US 20130184882A1
• Time in Patent Office: 1,754 Days
• Field of Search: 700/286
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/70 Interactions with external data bases, e.g. traffic centres
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 50/66 Arrangements of batteries
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: B60L 53/51 Photovoltaic means
• CPC Class Codes: B60L 53/52 Wind-driven generators
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/64 Optimising energy costs, e.g. responding to electricity rates
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 53/68 Off-site monitoring or control, e.g. remote control
• 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 3/28 Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: H02J 3/322 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
• 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 10/72 : Electric energy management in electromobility
• 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: Y02T 90/167 : 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]
• 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]
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

The invention judges a total power supply/demand condition of the electricity consumers 2 as a whole according to an individual power supply/demand condition of electricity consumers 2, judges a total usable capacity of all batteries 17 according to a usable capacity of the batteries 17 of electric vehicles 10 parked at electricity consumers 2, obtains required charge/discharge amounts of all the batteries 17 according to a result of comparison of the total power supply/demand condition of the electricity consumers 2 as a whole with the total usable capacity of all the batteries 17, subjects the batteries 17 to charge/discharge controls according to the required charge/discharge amounts, the power supply/demand conditions of the electricity consumers 2, and the usable capacities of the batteries.

Claims

1. A power supply and demand leveling system, comprising:

a plurality of electricity consumers supplied with electricity from electricity utilities through distribution lines, and whose electric vehicles are arbitrarily parked and connected to the distribution lines;

a power supply/demand condition judging device into which power supply/demand conditions of the electricity consumers are individually entered, and which judges from the entered information a total power supply/demand condition of the electricity consumers as a whole;

a battery capacity judging device into which capacities of batteries installed in the electric vehicles being parked, which will be usable after the batteries are charged/discharged, are individually entered from the electricity consumers, and which judges a total usable capacity from the entered information;

a charge/discharge command setting device into which an individual power supply/demand condition of the electricity consumers and a total power supply/demand condition of the electricity consumers as a whole are entered from the power supply/demand condition judging device, into which an individual usable capacity of the batteries and a total usable capacity of all the batteries are entered from the battery capacity judging device, sets charge/discharge commands required to prevent a fluctuation in power supply and demand of the electricity consumers as a whole and an imbalance of power supply and demand between the electricity consumers and level power supply and demand, with respect to the batteries of the electric vehicles on the above information, and outputs the preset charge/discharge commands to the respective electricity consumers; and

a charge/discharge controller that is provided to each of the electricity consumers and implements charge/discharge controls on the batteries according to the charge/discharge commands entered from the charge/discharge command setting device,

wherein a usable capacity of a battery entered from an electricity consumer is determined based on a difference between a maximum capacity of the battery and a capacity required to drive the electric vehicle as desired by a user.

2. The power supply and demand leveling system according to claim 1, wherein

the electricity consumers have an input device for entering a plurality of clock times after the electric vehicles are connected to the distribution lines, and also entering as the usable capacity a capacity allowing charge and discharge for equilibration of power supply and demand among the capacities of the batteries installed in the electric vehicles at each of the clock times, on the basis of drive schedules of the parked electric vehicles, and the usable capacity entered by means of the input device is outputted to the battery capacity judging device;

and

the battery capacity judging device judges a total usable capacity of all the batteries on the basis of the usable capacities entered from the electricity consumers.

3. The power supply and demand leveling system according to claim 1, wherein

the battery capacity judging device receives the usable capacities of the batteries individually not only from the electric vehicles parked at the electricity consumers but also from moving electric vehicles, and also receives estimated arrival times to the electricity consumers, namely, destinations, individually;

and

on the premise that the usable capacities of batteries of the electric vehicles are secured at the electric consumers at the estimated arrival times of the moving electric vehicles to the electricity consumers, a charge/discharge command setting device sets a present charge/discharge command of each battery.

4. The power supply and demand leveling system according to claim 2, wherein

the battery capacity judging device receives the usable capacities of the batteries individually not only from the electric vehicles parked at the electricity consumers but also from moving electric vehicles, and also receives estimated arrival times to the electricity consumers, namely, destinations, individually;

and

on the premise that the usable capacities of batteries of the electric vehicles are secured at the electric consumers at the estimated arrival times of the moving electric vehicles to the electricity consumers, a charge/discharge command setting device sets a present charge/discharge command of each battery.

5. The power supply and demand leveling system according to claim 1, wherein

the charge/discharge command setting device sets the charge/discharge command so that the batteries with a high usable capacity are provided with a larger charge/discharge amount than the batteries with a low usable capacity, in order to equalize a charge/discharge load of each of the batteries.