Communication method

• US 9,902,269 B2
• Filed: 12/11/2015
• Issued: 02/27/2018
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Abe, Taiji
• Primary Examiner(s): Williams, Arun
• Application Number:
  US14/965,927
• Publication Number:
  US 20160167537A1
• Time in Patent Office: 809 Days
• Field of Search: 320162
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/20 AC to AC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2240/70 Interactions with external data bases, e.g. traffic centres
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• 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: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/20 having different nominal voltages
• 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 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A method of communication between a power supply station and an electric vehicle is provided. In the method, the electric vehicle prepares a first information represented by a numerical value to be transmitted to the power supply station and transmits the first information by causing an AC power, which the electric vehicle draws from the power supply station, to have a current value corresponding to the first information based on a predetermined correspondence relationship. The power supply station receives the first information based on a magnitude of the current drawn by the electric vehicle and the first predetermined correspondence relationship.

Claims

1. A method of communication between a power supply station and an electric vehicle, the method comprising:

performing a first preparation in which the electric vehicle prepares a first information represented by a numerical value to be transmitted to the power supply station;

performing a first transmission in which the electric vehicle transmits the first information by causing an AC power, which the electric vehicle draws from the power supply station, to have a current value corresponding to the first information based on a predetermined first correspondence relationship;

performing a first reception in which the power supply station receives the first information based on a magnitude of the current drawn by the electric vehicle and the first correspondence relationship;

performing a second preparation in which the power supply station prepares a second information represented by a numerical value to be transmitted to the electric vehicle;

performing a second transmission in which the power supply station transmits the second information by causing a CPLT signal, which is transmitted to the electric vehicle, to have a duty ratio corresponding to the second information based on a predetermined second correspondence relationship; and

performing a second reception in which the electric vehicle receives the second information based on the duty ratio of the CPLT signal transmitted from the power supply station and the second correspondence relationship.

2. The method of communication according to claim 1, wherein:

at a time when a number of times a voltage zero crossing of the AC power is detected after start of transmission of the first information reaches a predetermined number of times, the electric vehicle starts transmitting a next first information.

3. The method of communication according to claim 1, wherein:

the electric vehicle transmits a plurality of the first informations as a first information group; and

the electric vehicle starts transmitting the first information group after causing the AC power to have a specific current value that is predetermined to indicate start of the transmission of the first information group.

4. The method of communication according to claim 1, wherein:

the electric vehicle transmits a plurality of the first informations as a first information group; and

the electric vehicle transmits the first information group in a time period until a number of times a voltage zero crossing of the AC power is detected reaches a predetermined number of times.

5. The method of communication according to claim 1, wherein:

the electric vehicle is equipped with a first electricity storage storing electric power for traveling and a second electricity storage storing electric power for auxiliary machine; and

when the first electricity storage becomes a fully-charged state, the electric vehicle stores in the second electricity storage the AC power drawn from the power supply station and continues performing the communication with the power supply station.

6. The method of communication according to claim 1, wherein

at a time when a number of times a voltage zero crossing of the AC power is detected after start of transmission of the second information reaches a predetermined number of times, the power supply station starts transmitting a next second information.

7. The method of communication according to claim 1, wherein:

the power supply station transmits a plurality of the second informations as a second information group; and

the power supply station starts transmitting the second information group after causing the CPLT signal to have a specific duty ratio that is predetermined to indicate start of the transmission of the second information group.

8. The method of communication according to claim 1, wherein:

the power supply station transmits a plurality of the second informations as a second information group; and

the power supply station transmits the second information group in a time period until a number of times a voltage zero crossing of the AC power is detected reaches a predetermined number of times.