Communication system and communication device

• US 9,577,709 B2
• Filed: 07/13/2012
• Issued: 02/21/2017
• 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: Kamaga, Ryuichi, Iwai, Atsushi, Okada, Ryou, Hagihara, Takeshi, Komatsu, Yutaka, Izumi, Tatsuya, Nii, Kazuhiko, Takata, Yousuke, Andoh, Hiroya, Ochiai, Yuta, Miyashita, Yukihiro, Nakagawa, Nobuyuki
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): Hassan, Sarah
• Application Number:
  US14/232,202
• Publication Number:
  US 20140192910A1
• Time in Patent Office: 1,684 Days
• Field of Search: 375/260, 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 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• 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: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• 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: 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

An output circuit sends out, to an input circuit, a control pilot signal generated by a voltage source. A voltage transformer is provided to a control pilot line on the output side of the output circuit, and a communication unit transmits and receives communication signals via the voltage transformer. A voltage transformer is provided to the control pilot line on the input side of the input circuit, and a communication unit transmits and receives the communication signals via the voltage transformer. A low-pass filter is provided to the control pilot line between the input circuit and the voltage transformer.

Claims

1. A communication system including an output circuit provided in a power feeding device for feeding power to a vehicle and outputting a rectangular wave signal of a predetermined frequency, and an input circuit provided in the vehicle and connected with the output circuit through a plurality of signal lines, the rectangular wave signal output by the output circuit being input to the input circuit through the plurality of signal lines, the communication system performing communication between the vehicle and the power feeding device by transmitting both a communication signal and the rectangular wave signal on the signal lines, the communication system comprising:

a first communication unit provided in the vehicle and performing transmission and reception of a communication signal, different from the rectangular wave signal, through a first voltage transformer interposed in a midway of the signal line;

a second communication unit provided in the power feeding device and performing transmission and reception of a communication signal, different from the rectangular wave signal, through a second voltage transformer interposed in a midway of the signal line; and

a first low pass filter interposed between the input circuit and the first voltage transformer to allow the rectangular wave signal to pass through as a rectangular wave signal and not to allow the communication signal to pass through.

2. The communication system according to claim 1, further comprising a second low pass filter interposed between the output circuit and the second voltage transformer to allow the rectangular wave signal to pass through as a rectangular wave signal and not to allow the communication signal to pass through.

3. The communication system according to claim 1, wherein

the first low pass filter includes:

a first inductor connected in series with the signal line; and

a capacitor connected between signal lines between the first inductor and the first voltage transformer.

4. The communication system according to claim 2, wherein

the second low pass filter includes:

a second inductor connected in series with the signal line; and

a capacitor connected between signal lines between the second inductor and the second voltage transformer.

5. The communication system according to claim 3, wherein

the first low pass filter includes a resistance connected in parallel with the first inductor.

6. The communication system according to claim 4, wherein

the second low pass filter includes a resistance connected in parallel with the second inductor.

7. The communication system according to claim 3, wherein

the first low pass filter includes a resistance connected in series with the first inductor.

8. The communication system according to claim 4, wherein

the second low pass filter includes a resistance connected in series with the second inductor.

9. The communication system according to claim 3, wherein

the first low pass filter includes a resistance connected in series with a capacitor.

10. The communication system according to claim 4, wherein

the second low pass filter includes a resistance connected in series with a capacitor.

11. A communication device including an output circuit outputting a rectangular wave signal of a predetermined frequency through a plurality of signal lines, comprising:

a communication unit performing transmission and reception of a communication signal, different from the rectangular wave signal, by transmitting both the communication signal and the rectangular wave signal on the signal lines through a voltage transformer interposed in a midway of the signal line; and

a low pass filter interposed between the output circuit and the voltage transformer to allow the rectangular wave signal to pass through as a rectangular wave signal and not to allow the communication signal to pass through.

12. The communication device according to claim 11, further comprising:

a generation unit generating the rectangular wave signal;

a voltage detection unit detecting an output voltage of the output circuit; and

an adjustment unit adjusting a rectangular wave signal generated by the generation unit in accordance with the voltage detected by the voltage detection unit.

13. A communication device, including an input circuit to which a rectangular wave signal of a predetermined frequency is input through a plurality of signal lines, comprising:

a communication unit performing transmission and reception of a communication signal, different from the rectangular wave signal, by transmitting both the communication signal and the rectangular wave signal on the signal lines through a voltage transformer interposed in a midway of the signal line; and

a low pass filter interposed between the input circuit and the voltage transformer to allow the rectangular wave signal to pass through as a rectangular wave signal and not to allow the communication signal to pass through.

14. The communication device according to claim 13, further comprising:

a resistance unit having a plurality of resistances and capable of adjusting a resistance value; and

an adjustment unit adjusting a resistance value of the resistance unit so as to change a voltage of the resistance unit.