Energy management system

• US 9,358,896 B2
• Filed: 12/06/2012
• Issued: 06/07/2016
• Est. Priority Date: 12/27/2011
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nishita, Yoshito, Tanimoto, Masahiko, Osawa, Nanaho
• Primary Examiner(s): Dinh, Paul
• Application Number:
  US14/362,755
• Publication Number:
  US 20140361745A1
• Time in Patent Office: 1,279 Days
• Field of Search: 320107-109, 320/115
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/80 Time limits
• CPC Class Codes: B60L 53/305 Communication interfaces
• 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 53/665 Methods related to measuring, billing or payment
• 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: G06Q 50/06 Energy or water supply
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• 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: 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 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

An energy management system that achieves minimization of electric power costs and leveling of an electric power demand while securing necessary battery residual quantity. The energy management system includes a charging stand that supplies electric power to an electric vehicle (EV) as an electric power supply part, a reservation information acquisition unit that acquires reservation information on electric power reception of the EV in the charging stand before the EV arrives at the charging stand, a charging plan preparation unit that predicts an electric power demand in the charging stand and prepares a charging plan for the EV based on the reservation information, and a charging controller that controls electric power supply for the EV in the charging stand based on the charging plan.

Claims

1. An energy management system comprising:

an electric power supply part that supplies electric power to an electric vehicle;

a reservation information acquisition unit that acquires reservation information before said electric vehicle arrives at the electric power supply part, said reservation information including at least estimated connection time that said electric vehicle is connected to said electric power supply part and estimated parallel-off time that said electric vehicle is paralleled off from said electric power supply part;

a connection-and-parallel-off control unit that controls connection-and-parallel-off information indicating a connection state and parallel-off state of said electric vehicle to said electric power supply part;

an electric vehicle result control unit that controls said reservation information and said connection-and-parallel-off information;

an electric vehicle tendency evaluation unit that prepares tendency information of said electric vehicle using a difference between said estimated connection time and actual connection time indicated by said connection-and-parallel-off information, and a difference between said estimated parallel-off time and actual parallel-off time indicated by said connection-and-parallel-off information;

a charging plan preparation unit that predicts an electric power demand in said electric power supply part and prepares a charging plan for said electric vehicle based on said tendency information; and

a charging controller that controls electric power supply for said electric vehicle in said electric power supply part based on said charging plan.

2. The energy management system according to claim 1, wherein said electric vehicle result control unit controls said reservation information and said connection-and-parallel-off information in association with identification ID of said electric vehicle or user ID of said electric vehicle.

3. The energy management system according to claim 2, wherein said tendency information is probability distribution information of each said identification ID of said electric vehicle based on said difference of time.

4. The energy management system according to claim 2, wherein said tendency information is probability distribution information of each said user ID of said electric vehicle based on said difference of time.

5. The energy management system according to claim 1, wherein said tendency information is classified into at least either each day-of-the-week or a time period.

6. The energy management system according to claim 1, wherein said reservation information further includes a minimum charging quantity to be secured of said electric vehicle, and

said charging plan preparation unit prepares said charging plan so that said electric vehicle is charged as outside a scope of control until a charging quantity of said electric vehicle reaches said minimum charging quantity to be secured.

7. The energy management system according to claim 1, wherein said charging plan preparation unit prepares said charging plan so that all electric vehicles connected to said electric power supply part are controlled to one of positive charging electric energy and negative charging electric energy.

8. An energy management system comprising:

an electric power supply part that supplies electric power to an electric vehicle;

a reservation information acquisition unit that acquires reservation information before said electric vehicle arrives at the electric power supply part, said reservation information including at least estimated connection time that said electric vehicle is connected to said electric power supply part and estimated parallel-off time that said electric vehicle is paralleled off from said electric power supply part;

a charging plan preparation unit that predicts an electric power demand in said electric power supply part and prepares a charging plan for said electric vehicle based on allowable estimated connection time shifted from said estimated connection time by a predetermined time and allowable estimated parallel-off time shifted from said estimated parallel-off time by a predetermined time; and

a charging controller that controls electric power supply for said electric vehicle in said electric power supply part based on said charging plan.

9. The energy management system according to claim 8, wherein said allowable estimated connection time is time estimated by a car-navigation system of said electric vehicle.