Communication system

• US 9,240,821 B2
• Filed: 07/13/2012
• Issued: 01/19/2016
• Est. Priority Date: 07/13/2011
• Status: Active Grant

• Current Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Takata, Yousuke, Komatsu, Yutaka, Hagihara, Takeshi, Andoh, Hiroya, Ochiai, Yuta, Kamaga, Ryuichi, Iwai, Atsushi, Miyashita, Yukihiro, Nakagawa, Nobuyuki
• Primary Examiner(s): PATEL, DHAVAL V
• Application Number:
  US14/232,215
• Publication Number:
  US 20140254695A1
• Time in Patent Office: 1,285 Days
• Field of Search: 375/258, 320/108, 320/137, 320/138, 327/546, 327/633, 324/705, 307/104
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2240/527 Voltage
• CPC Class Codes: B60L 2270/147 electro magnetic [EMI]
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/34 Plug-like or socket-like devices specially adapted for contactless inductive charging of electric vehicles positioning means for charging devices using inductive energy transfer B60L53/38
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04B 2203/5416 by adding signals to the wave form of the power source
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02
• 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 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A charging station performs communications by use of a superimposing/separating unit configured by connecting a capacitor, a coupling transformer and a capacitor to branch lines branching out respectively from a control cable and a grounded cable. An electric vehicle performs communications by use of a superimposing/separating unit configured by providing a coupling transformer to the control cable. A capacitor is also connected between the control cable and the grounded cable. Communications are allowed by the configuration of a closed loop circuit comprising the control cable, the branch line, the capacitor, a primary coil of the coupling transformer, the capacitor, the branch line, the grounded cable, the capacitor, and a primary coil of the coupling transformer.

Claims

1. A communication system comprising:

a power feeding device, and

a vehicle connected to the power feeding device by two cables, and the vehicle having an electric storage device receiving power from the power feeding device, and communication of a control signal required for charge control of the electric storage device is performed through the cables, wherein

one of the power feeding device and the vehicle includes

a first superimposing/separating unit connected to two branch lines branched from the two cables, respectively, and performing superimposition of a communication signal different from the control signal onto communication through the cables and performing separation of the communication signal superimposed onto the communication through the cables, and

a first communication unit transmitting and receiving a communication signal through the first superimposing/separating unit, and that

another one of the power feeding device and the vehicle includes

a second superimposing/separating unit located in only one of the two cables and performing superimposition of the communication signal onto communication through the cable and performing separation of the communication signal superimposed onto the communication through the cable, and

a second communication unit transmitting and receiving a communication signal through the second superimposing/separating unit.

2. The communication system according to claim 1, wherein

the first superimposing/separating unit includes

a capacitor connected to each of the two branch lines, and

a first signal transformer of an electromagnetic induction type in which a primary coil is connected to the capacitor and a secondary coil is connected to the first communication unit, and that

the second superimposing/separating unit includes

a second signal transformer of an electromagnetic induction type in which a primary coil is interposed in said one of the cables and a secondary coil is connected to the second communication unit, and

a capacitor connected between the two cables.

3. The communication system according to claim 1, wherein one of the cables is grounded.

4. The communication system according to claim 2, wherein one of the cables is grounded.

5. A communication system comprising:

a power feeding device, and

a power receiving device connected to the power feeding device by two cables, and communication of a control signal required for charge control based on power fed from the power feeding device to the power receiving device is performed through the cables, wherein

one of the power feeding device and the power receiving device includes

a first superimposing/separating unit connected to two branch lines branched from the two cables, respectively, and performing superimposition of a communication signal different from the control signal onto communication through the cables and separation of the communication signal superimposed onto the communication through the cables, and

a first communication unit transmitting and receiving a communication signal through the first superimposing/separating unit, and that

another one of the power feeding device and the power receiving device includes

a second superimposing/separating unit located in only one of the two cables and performing superimposition of the communication signal onto communication through the cable and separation of the communication signal superimposed onto the communication through the cable, and

a second communication unit transmitting and receiving a communication signal through the second superimposing/separating unit.

6. A communication system comprising:

a power feeding device, and

a vehicle connected to the power feeding device by two cables, and the vehicle having an electric storage device receiving power from the power feeding device, and communication of a control signal required for charge control of the electric storage device is performed through the cables, wherein

one of the power feeding device and the vehicle includes

a first superimposing/separating unit connected to two branch lines branched from the two cables, respectively, and performing superimposition of a communication signal different from the control signal onto communication through the cables and performing separation of the communication signal superimposed onto the communication through the cables, and

a first communication unit transmitting and receiving a communication signal through the first superimposing/separating unit, and that

another one of the power feeding device and the vehicle includes

a second superimposing/separating unit located in one of the cables and performing superimposition of the communication signal onto communication through the cable and performing separation of the communication signal superimposed onto the communication through the cable, and

a second communication unit transmitting and receiving a communication signal through the second superimposing/separating unit,

wherein

the first superimposing/separating unit includes

a capacitor connected to each of the two branch lines, and

a first signal transformer of an electromagnetic induction type in which a primary coil is connected to the capacitor and a secondary coil is connected to the first communication unit, and that

the second superimposing/separating unit includes

a second signal transformer of an electromagnetic induction type in which a primary coil is interposed in said one of the cables and a secondary coil is connected to the second communication unit, and

a capacitor connected between the two cables.

7. The communication system according to claim 6, wherein one of the cables is grounded.