ELECTRICITY MANAGEMENT DEVICE, ELECTRICITY MANAGEMENT PROGRAM, AND ELECTRICITY DISTRIBUTION SYSTEM

• US 20140312841A1
• Filed: 11/19/2012
• Published: 10/23/2014
• Est. Priority Date: 11/22/2011
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Baba, Akira
• Granted Patent: US 10,406,927 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/305 Communication interfaces
• 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 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• 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: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: Y02B 10/10 Photovoltaic [PV]
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 70/30 Systems combining energy storage with energy generation of non-fossil origin
• 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 90/16 : 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 20/222 : Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/242 : Home appliances
• CPC Class Codes: Y04S 30/12 : Remote or cooperative charging
• CPC Class Codes: Y04S 40/20 : Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A electricity management device increases a counter value as an electric vehicle is charged from grid power that is supplied from an electrical grid, retains the counter value when the electric vehicle is charged from electricity generated by an electricity generation device, and reduces the counter value as electricity in the electric vehicle is discharged to a distribution board.

Claims

1. A electricity management device, comprising:

a charging electricity accumulator which increases a counter value as a rechargeable battery of an electric vehicle is charged from grid power that is supplied from an electrical grid and retains the counter value when the rechargeable battery of the electric vehicle is charged from electricity that is generated by a electricity generation device in a house; and

a discharging electricity accumulator which reduces the counter value as electricity in the rechargeable battery of the electric vehicle is discharged into the house.

2. The electricity management device according to claim 1, further comprising a controller which performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house until the counter value becomes a predetermined target value.

3. The electricity management device according to claim 2, wherein

the predetermined target value is set to 0, and

the controller performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house until the counter value becomes 0.

4. The electricity management device according to claim 2, further comprising a travel distance acquisition unit acquiring travel distance of the electric vehicle, wherein

a carbon dioxide emission coefficient and a counter target value are previously set, the carbon dioxide emission coefficient indicating an amount of carbon dioxide emissions per unit of the grid power, and the counter target value corresponding to an amount of carbon dioxide emissions per unit of the travel distance by the electric vehicle, and

the charging electricity accumulator adds a value to the counter value, the added value is obtained by multiplying the amount of charging electricity of the rechargeable battery of the electric vehicle from the grid power by the carbon dioxide emission coefficient and dividing the obtained product by the travel distance acquired by the travel distance acquisition unit, and

the controller performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house until the counter value becomes the counter target value corresponding to the amount of carbon dioxide emissions per unit of the travel distance of the electric vehicle.

5. The electricity management device according to claim 2, the controller estimates an amount of electricity generated by the electricity generation device on the next day and an electricity demand of the house on the next day, and the controller performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house only when it is predicted that the rechargeable battery of the electric vehicle can be fully charged.

6. The electricity management device according to claim 5, wherein the controller sets the upper limit of the amount of electricity discharged from the rechargeable battery of the electric vehicle into the house to an amount of surplus electricity which is obtained by subtracting the estimated electricity demand of the house of the next day from the estimated amount of electricity generated by the electricity generation device on the next day.

7. The electricity management device according to claim 5, wherein the carbon dioxide emission coefficient indicating an amount of carbon dioxide emissions per unit of the grid power is previously set, and

the counter value is set to the amount of carbon dioxide emissions which is obtained by multiplying the carbon dioxide emission coefficient by the amount of charging electricity and the amount of electricity discharged.

8. The electricity management device according to claim 5, wherein an electricity buying price coefficient and an electricity selling price coefficient are previously set, the electricity buying price coefficient indicating electricity buying price per unit of the grid power, the electricity selling price coefficient indicating an electricity selling price per unit of the electricity generated by the electricity generation device,

as the rechargeable battery of the electric vehicle is charged from the generated electricity, the amount of electricity generated is multiplied by the electricity selling price coefficient to be added to the counter value, and

as the rechargeable battery of the electric vehicle is charged from the grid power, the amount of grid power is multiplied by the electricity buying price coefficient to be added to the counter value.

9. The electricity management device according to claim 1, further comprising a display unit displaying the counter value or information corresponding to the counter value.

10. The electricity management device according to claim 1, wherein the charging electricity accumulator increases the counter value in accordance with the amount of charging electricity for a plurality of electric vehicles, and

the discharging electricity accumulator reduces the counter value in accordance with the amount of electricity discharged by the plurality of electric vehicles.

11. An electricity management method comprising:

increasing a counter value as a rechargeable battery of an electric vehicle is charged from grid power that is supplied from an electrical grid and retaining the counter value when the rechargeable battery of the electric vehicle is charged by electricity that is generated by an electricity generation device in a house, and

reducing the counter value as electricity in the rechargeable battery of the electric vehicle is discharged into the house.

12. An electricity distribution system, comprising:

an electricity generator generating electricity;

an electricity distribution unit distributing the electricity generated by the electricity generator, grid power supplied from an electrical grid, and charging/discharging electricity of a rechargeable battery of an electric vehicle;

a electricity management unit including;

a charging electricity accumulator which increases a counter value as a rechargeable battery of an electric vehicle is charged from grid power that is supplied from an electrical grid and retains the counter value when the rechargeable battery of the electric vehicle is charged by electricity that is generated by the electricity generator; and

a discharging electricity accumulator which reduces the counter value as electricity in the rechargeable battery of the electric vehicle is discharged; and

a controller controlling the operation of the electricity distribution unit based on the counter value calculated by the electricity management unit.