CHARGING SYSTEM FOR MINIMIZING SYSTEM ENERGY

• US 20140049217A1
• Filed: 08/08/2013
• Published: 02/20/2014
• Est. Priority Date: 08/15/2012
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Nakagawa, Tomoaki, Kato, Takayuki, Noguchi, Junya, Takuno, Shinji, Amari, Yusaku, Hirosawa, Atsushi, Abe, Hiroyuki
• Granted Patent: US 9,233,616 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• 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: 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 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A vehicle-mounted electric storage device of an electrically driven vehicle is charged with a necessary amount of energy, which corresponds to an amount of energy consumption in a next-time running of the electrically driven vehicle, such that a shortage of renewable energy at a charging site is compensated for by charging the electrically driven vehicle with system energy.

Claims

1. A charging system for minimizing system energy comprising:

an electrically driven vehicle including a vehicle-mounted electric storage device, which is charged with and retains renewable energy and system energy, and a vehicle-mounted charging controller for controlling charging of the vehicle-mounted electric storage device; and

a charging site including a generating device for generating the renewable energy, a charging site electric storage device for storing the renewable energy and the system energy, and a charging-site charging controller for controlling storage of energy in the charging site electric storage device, and also controlling a type of energy used for charging the vehicle-mounted electric storage device of the electrically driven vehicle from the charging site,

wherein the vehicle-mounted charging controller and the charging-site charging controller cooperate to charge the vehicle-mounted electric storage device of the electrically driven vehicle with a necessary amount of energy, which corresponds to an amount of energy consumption in a next-time running of the electrically driven vehicle, such that a shortage of the renewable energy is compensated for by charging with the system energy.

2. The charging system for minimizing system energy according to claim 1, wherein the vehicle-mounted charging controller and the charging-site charging controller calculate a necessary amount Ex of the system energy used for charging the vehicle-mounted electric storage device of the electrically driven vehicle up to a present charging end time, using the equation Ex=Ea−

(Eb+Ec+Ed), wherein Ea is the amount of energy consumption in the next-time running, Eh is an amount of energy generated by the generating device from a last charging end time to the present charging end time, Ec is a remaining amount of energy in the vehicle-mounted electric storage device of the electrically driven vehicle at a present charging start time, and Ed is a remaining amount of energy in the charging site electric storage device at the charging site at the present charging start time, thereby minimizing the necessary amount Ex of the system energy.

3. The charging system for minimizing system energy according to claim 1, wherein:

the vehicle-mounted charging controller and the charging-site charging controller memorize an electricity rate of the system energy in respective time zones, and

when the vehicle-mounted electric storage device of the electrically driven vehicle is charged from the charging site, the vehicle-mounted electric storage device is charged with the system energy in real time during a time zone in which the electricity rate is lowest.

4. The charging system for minimizing system energy according to claim 1, wherein:

when the vehicle-mounted electric storage device of the electrically driven vehicle is charged from the charging site, the vehicle-mounted charging controller and the charging-site charging controller charge the vehicle-mounted electric storage device with the renewable energy, which is generated in real time by the generating device, if the generating device is generating the renewable energy.

5. The charging system for minimizing system energy according to claim 1, wherein the vehicle-mounted charging controller and the charging-site charging controller estimate the amount of energy consumption in the next-time running, based on a past energy consumption history during running of the electrically driven vehicle.