# US 2014/0192910 A1 · Communication system and communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192910 A1 - Document ID: US20140192910A1 - Status: Published application - Kind: A1 - Application number: 14/232,202 - Filed: 2012-07-13 - Published: 2014-07-10 - Earliest claimed: 2011-07-13 - Assignees: Sumitomo Kitahama 4-chome; Toyota Jidosha Kabushiki Kaisha; Autonetworks Technologies, Ltd.; Sumitomo Wiring - Inventors: Ryou Okada; Takeshi Hagihara; Yutaka Komatsu; Tatsuya Izumi; Kazuhiko Nii; Yousuke Takata; Hiroya Andoh; Yuta Ochiai; Ryuichi Kamaga; Atsushi Iwai; Yukihiro Miyashita; Nobuyuki Nakagawa - Web page: https://patentgrep.com/patent/US20140192910A1 ## CPC - H04B 3/54: Systems for transmission via power distribution lines - B60L 53/16: Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles - B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles - B60L 53/30: Constructional details of charging stations - B60L 53/65: involving identification of vehicles or their battery types - B60L 58/12: responding to state of charge [SoC] - H01F 38/14: Inductive couplings - H02J 7/44: between battery management systems and power sources - H02J 7/485: {with provisions for charging different types of batteries} - H04B 3/548: {the power on the line being DC (arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02)} - B60L 2210/30: AC to DC converters - B60L 2240/527: Voltage - B60L 2270/147: electro magnetic [EMI] - H04B 2203/5416: by adding signals to the wave form of the power source - H04B 2203/547: via DC power distribution - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 10/72: Electric energy management in electromobility - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - 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] - Y04S 30/14: Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing - H04B: TRANSMISSION - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## 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 ### Claim at position 1 1-10. (canceled) ### Claim 11 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, the communication system performing communication between the vehicle and the power feeding device by superimposing a communication signal onto the signal lines, comprising: a first communication unit provided in the vehicle and performing transmission and reception of a communication 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 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. ### Claim 12 (depends on 11) The communication system according to claim 11, further comprising a second low pass filter interposed between the output circuit and the second voltage transformer. ### Claim 13 (depends on 11) The communication system according to claim 11, 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, and 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. ### Claim 14 (depends on 12) The communication system according to claim 12, 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, and 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. ### Claim 15 (depends on 13) The communication system according to claim 13, wherein the first low pass filter includes a resistance connected in parallel with the first inductor, and the second low pass filter includes a resistance connected in parallel with the second inductor. ### Claim 16 (depends on 14) The communication system according to claim 14, wherein the first low pass filter includes a resistance connected in parallel with the first inductor, and the second low pass filter includes a resistance connected in parallel with the second inductor. ### Claim 17 (depends on 13) The communication system according to claim 13, wherein the first low pass filter includes a resistance connected in series with the first inductor, and the second low pass filter includes a resistance connected in series with the second inductor. ### Claim 18 (depends on 14) The communication system according to claim 14, wherein the first low pass filter includes a resistance connected in series with the first inductor, and the second low pass filter includes a resistance connected in series with the second inductor. ### Claim 19 (depends on 13) The communication system according to claim 13, wherein each of the first and second low pass filters includes a resistance connected in series with a capacitor. ### Claim 20 (depends on 14) The communication system according to claim 14, wherein each of the first and second low pass filters includes a resistance connected in series with a capacitor. ### Claim 21 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 by superimposing a communication signal onto 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. ### Claim 22 (depends on 21) The communication device according to claim 21, 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. ### Claim 23 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 by superimposing a communication signal onto 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. ### Claim 24 (depends on 23) The communication device according to claim 23, 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.