IN-VEHICLE CONTROL SYSTEM

• US 20150329004A1
• Filed: 03/25/2015
• Published: 11/19/2015
• Est. Priority Date: 05/19/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: SAKAI, Naoto
• Granted Patent: US 9,440,541 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/16 Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/18 Cables specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• 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

Abstract

An in-vehicle control system is mounted in a vehicle, which is connectable with a charging station through a charging cable and provided with a battery chargeable from the charging station through the charging cable. The vehicle includes a double-wire type communication line provided with a charger-side terminal circuit. The in-vehicle control system includes a first communication line and a second communication line, which are connectable to the communication line of the charging cable and provided with three terminal circuits. The in-vehicle control system further includes a first ECU and a second ECU, which are connected to the first communication line and the second communication line. When a charging plug is connected to a charging port, the first ECU and the second ECU validate the first terminal circuit and invalidate the second terminal circuit and the third terminal circuit.

Claims

1. An in-vehicle control system mounted in a vehicle, which is connectable to a charging facility through a charging cable including a double-wire type facility-side communication line and a charging power cable connected with a facility-side terminal circuit and has a battery chargeable from the charging facility through the charging power cable, the in-vehicle control system comprising:

a double-wire type vehicle-side communication line connectable to the facility-side communication line and including three vehicle-side terminal circuits;

plural electronic devices connected to the vehicle-side communication line and capable of communication through the vehicle-side communication line by using a differential voltage, the plural electronic devices including a charging control device capable of communication with the charging facility through the vehicle-side communication line and the facility-side communication line by using the differential voltage; and

changeover members provided in correspondence to the three vehicle-side terminal circuits and individually validating and invalidating the three vehicle-side terminal circuits, respectively,

wherein the changeover members validate two of the three vehicle-side terminal circuits and invalidate a remaining one of the three vehicle-side terminal circuits, when the facility-side communication line is disconnected from the vehicle-side communication line, and

the changeover members validate one of the three vehicle-side terminal circuits and invalidate remaining two of the three vehicle-side terminal circuits, when the facility-side communication line is connected to the vehicle-side communication line.

2. The in-vehicle control system according to claim 1, wherein:

the vehicle has a charging port, to which the charging cable is connectable;

one of the three vehicle-side terminal circuits is a charging port terminal circuit, which is located at a position closer to the charging port than positions of connection of the plural electronic devices in the vehicle-side communication line;

the changeover members invalidate the charging port terminal circuit and validate remaining two of the three vehicle-side terminal circuits, when the facility-side communication line is disconnected from the vehicle-side communication line; and

the changeover members validate the charging port terminal circuit and invalidate remaining two of the three vehicle-side terminal circuits, when the facility-side communication line is connected to the vehicle-side communication line.

3. The in-vehicle control system according to claim 1, wherein:

at least one of the plural electronic devices commands each of the changeover members to validate and invalidate the vehicle-side terminal circuits based on whether the facility-side communication line is connected to the vehicle-side communication line.

4. The in-vehicle control system according to claim 3, wherein:

at least one of the plural electronic devices commands validation of one of the three vehicle-side terminal circuits and invalidation of remaining two of the three vehicle-side terminal circuits before the charging facility and the charging control device start communication, when the facility-side communication line is connected to the vehicle-side communication line.

5. The in-vehicle control system according to claim 1, further comprising:

plural second electronic devices different from the plural electronic devices;

a second vehicle-side communication line, which is a double-wire type and different from the vehicle-side communication line, and to which the plural second electronic devices are connected;

the plural electronic devices include a first communication circuit for communication through the vehicle-side communication line and a second communication circuit for communication through the second vehicle-side communication line; and

the second communication circuit is used to perform communication through the second vehicle-side communication line until the charging facility and the charging control device start to communicate, when the facility-side communication line is connected to the vehicle-side communication line.

6. The in-vehicle control system according to claim 2, wherein:

the changeover member, which validates and invalidates the charging port terminal circuit, is a mechanically-operable member;

the mechanically-operable member validates the charging port terminal circuit by being pressed by the charging cable, when the charging cable is connected to the charging port; and

the mechanically-operable member invalidates the charging port terminal circuit by being released from pressing of the charging cable, when the charging cable is disconnected from the charging port.

7. The in-vehicle control system according to claim 1, wherein:

the vehicle-side terminal circuit includes two terminal resistors connected in series, and a noise-filtering element connected to a middle point between the two terminal resistors;

the changeover members connect the two terminal resistors and the noise-filtering element to the vehicle-side communication line, when the vehicle-side terminal circuit is validated; and

the changeover members disconnect the two terminal resistors and the noise-filtering element from the vehicle-side communication line, when the vehicle-side terminal circuit is invalidated