Charging control system, charging control method, and recording medium

• US 9,221,347 B2
• Filed: 02/10/2012
• Issued: 12/29/2015
• Est. Priority Date: 03/04/2011
• Status: Active Grant

• Current Assignee: NEC Corporation, University of Tokyo
• Original Assignee: NEC Corporation, University of Tokyo
• Inventors: Kuribayashi, Ryosuke, Yano, Hitoshi, Kudo, Koji, Ogimoto, Kazuhiko, Kataoka, Kazuto, Ikegami, Takashi
• Primary Examiner(s): Doan, Nghia
• Application Number:
  US14/002,681
• Publication Number:
  US 20130335033A1
• Time in Patent Office: 1,418 Days
• Field of Search: 320/109, 320/104, 320/155
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/72 Charging station selection relying on external data
• CPC Class Codes: B60L 2240/80 Time limits
• 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 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/53 Batteries
• 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 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: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/12 The local stationary network supplying a household or a building
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 7/02 : for charging batteries from ac mains by converters
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• 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

A charging control system that controls charging of an automobile that uses electric power as motive power include a receiving unit that receives electric power demands from an electric power supplier side; and a control unit that controls charging on and off of the automobile. The control unit changes a ratio of a charging-on duration and a charging-off duration in each duration in allowable charging durations for the automobile according to changes of the electric power demands over time.

Claims

1. A charging control system that controls charging of an automobile that uses electric power as motive power, comprising:

a receiving unit that receives electric power demands from an electric power supplier side; and

a control unit that controls charging on and off of said automobile,

wherein said control unit changes a ratio of a charging-on duration and a charging-off duration in each duration in allowable charging durations for said automobile according to changes of said electric power demands over time,

wherein said control unit includes;

a first calculation unit that causes a required charging duration at which said automobile is charged in a predetermined charged state at a specific charging speed of said automobile to be divided by each of said allowable charging durations so as to calculate a reference value of the ratio of said charging-on duration and each of said allowable charging durations;

a second calculation unit that causes a demand ratio function based on time changes of said electric power demands to be multiplied by said reference value so as to calculate a setting value of the ratio of said charging-on duration and each of said allowable charging durations; and

a charging control unit that controls charging on and off based on said setting value.

2. The charging control system as set forth in claim 1,

wherein said charging control unit causes said setting value to be divided by a predetermined duration so as to calculate a period of charging pulses having a pulse width of said predetermined duration and controls charging on and off corresponding to the period of the charging pulses.

3. The charging control system as set forth in claim 1,

wherein if a sudden electric power demand that changes over time occurs on said electric power supplier side, said second calculation unit causes a correction coefficient corresponding to the electric power demand to be divided by both said demand ratio function and said reference value so as to calculate said setting value.

4. A charging control method for a charging control system that controls charging of an automobile that uses electric power as motive power, comprising:

receiving electric power demands from an electric power supplier side; and

controlling charging on and off of said automobile,

wherein said controlling includes changing a ratio of a charging-on duration and a charging-off duration in each duration in allowable charging durations for said automobile according to changes of said electric power demands over time,

wherein said controlling further includes;

causing a required charging duration at which said automobile is charged in a predetermined charged state at a specific charging speed of said automobile to be divided by each of said allowable charging durations so as to calculate a reference value of the ratio of said charging-on duration and each of said allowable charging durations;

causing a demand ratio function based on time changes of said electric power demands to be multiplied by said reference value so as to calculate a setting value of the ratio of said charging-on duration and each of said allowable charging durations; and

controlling charging on and off based on said setting value.

5. A computer readable recording medium that records a program causing a computer that controls charging of an automobile that uses electric power as motive power to execute procedures comprising:

receiving electric power demands from an electric power supplier side; and

controlling charging on and off of said automobile,

wherein said controlling includes changing a ratio of a charging-on duration and a charging-off duration in each duration in allowable charging durations for said automobile according to changes of said electric power demands over time,

wherein said controlling further includes;

causing a required charging duration at which said automobile is charged in a predetermined charged state at a specific charging speed of said automobile to be divided by each of said allowable charging durations so as to calculate a reference value of the ratio of said charging-on duration and each of said allowable charging durations;

causing a demand ratio function based on time changes of said electric power demands to be multiplied by said reference value so as to calculate a setting value of the ratio of said charging-on duration and each of said allowable charging durations; and

controlling charging on and off based on said setting value.