CHARGING SYSTEM

• US 20090085522A1
• Filed: 09/23/2008
• Published: 04/02/2009
• Est. Priority Date: 09/27/2007
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Matsumoto, Kazuaki
• Granted Patent: US 7,795,841 B2
• Time in Patent Office: Days
• US Class Current: 320/137
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y02T 10/62 Hybrid 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
• CPC Class Codes: Y10S 320/12 Precharging analysis, e.g. determining presence of battery

Abstract

A charging system and method is capable of starting or stopping charging a battery of a vehicle at a convenient time. A portable device and a vehicle unit can communicate with each other. A user is determined to be away from the vehicle based on a result of communication between the portable device and the vehicle unit. A charging ECU starts charging a battery when the user is away from the vehicle. Charging of the battery can be started when the user is assumed to have stopped using the vehicle and will not use the vehicle for a period of time. When the user is determined to be close to the vehicle it is assumed that use of the vehicle will be resumed at which point the system instructs the charging of the battery to be stopped. The system thereby allows the vehicle to be ready for use.

Claims

1. A charging system comprising:

a battery charger installed near a parking position of a vehicle, the battery charger capable of charging a battery mounted on the vehicle during a charging operation;

a portable device carried by a user of the vehicle, the portable device having a communication function;

a vehicular communication device mounted on the vehicle for communicating with the portable device; and

a battery charging control section mounted on the vehicle, the battery charging control section configured to;

start the charging operation to charge the battery when the user is determined to be away from the vehicle; and

stop the charging operation to charge the battery when the user is determined to be close to the vehicle,

wherein the user is determined to be away from or close to the vehicle based on a first communication result between the vehicular communication device and the portable device.

2. The charging system of claim 1, further comprising a battery charger communication device that communicates with the portable device and the vehicular communication device,

wherein the battery charger starts the charging operation when the user is determined to be away from the battery charger based on a second communication result between the batter charger communication device and one of the portable communication device and the vehicular communication device;

and

wherein the battery charger stops the charging operation when the user is determined to be close to the battery charger based on the second communication result.

3. The charging system of claim 1, further comprising a battery charger communication device that communicates with the portable device and the vehicular communication device,

wherein the battery charging control section supplies an instruction for the battery charger to start charging the battery and supplies the instruction for the battery charger to stop charging the battery;

and

wherein the instruction from the battery charging control section is supplied to the battery charger through the communication between the vehicular communication device and the battery charger communication device.

4. The charging system of claim 1, further comprising a battery charger communication device that communicates with the portable device and the vehicular communication device,

wherein the battery charger starts charging when a user is determined to be away from the vehicle based on a second communication result between the portable device and the batter charger communication device;

wherein the battery charger stops charging when a driver is determined to be close to the battery charger based on the second communication result;

wherein the battery charging control section instructs the battery charger to start charging for starting charging of the battery and instructs the battery charger to stop charging for stopping charging of the battery;

wherein the battery charging control section supplies an instruction to the battery charger through communication between the vehicular communication device and the battery charger communication device; and

wherein the battery charger starts and stops a charging operation in the battery charger based on a first acquired one of communication with the portable device and an instruction from the battery charging control section.

5. The charging system of claim 1,

wherein the portable device transmits a specific ID code to the vehicular communication device in order to communicate with the vehicular communication device;

and

wherein the battery charging control section starts and stops the charging operation for charging the battery based on the first communication result with the portable device when a received ID code received by the vehicular communication device matches a registered ID code.

6. The charging system of claim 2,

wherein the portable device transmits a specific ID code to the battery charger communication device when communicating with the battery charger communication device;

and

wherein the battery charger starts or stops a charging operation in the battery charger based on a result of communication with the portable device when an ID code received by the battery charger communication device matches a registered ID code.

7. The charging system of claim 1,

wherein the vehicular communication device provides a communication area around the vehicle having a specified range and repeatedly transmits a request signal in the communication area;

wherein the portable device enters the communication area, receives the request signal, and returns a response signal in response to the request signal;

wherein the battery charging control section determines the user to be away from the vehicle when the vehicular communication device becomes incapable of receiving the response signal; and

wherein the battery charging control section determines the user to be close to a vehicle when the vehicular communication device becomes capable of receiving the response signal.

8. The charging system of claim 7,

wherein the vehicular communication device periodically transmits the request signal when the vehicle parks with a door thereof locked.

9. The charging system of claim 7, comprising:

a lock operation section provided for a door of the vehicle, the lock operation section used for processing a lock instruction;

an unlock operation section provided for a door of the vehicle, the unlock operation section used for processing an unlock instruction; and

a lock/unlock control section that locks or unlocks a door of the vehicle in accordance with an operation of the user on the lock operation section and the unlock operation section,

wherein, when an ID code contained in a response signal received by the vehicular communication device matches a registered ID code, the battery charging control section outputs an enabling signal that enables the lock/unlock control section to lock or unlock a door of the vehicle.

10. The charging system of claim 1,

wherein the communication device is provided with a lock operation section to be operated based on a lock instruction and an unlock operation section to be operated based on an unlock instruction;

wherein the lock operation section is operated to transmit a lock signal;

wherein the unlock operation section is operated to transmit an unlock signal;

wherein the vehicle includes a lock/unlock control section that locks or unlocks a door of the vehicle in response to reception of the lock signal or the unlock signal by the vehicular communication device;

wherein the battery charging control section determines the user to be away from a vehicle when the vehicular communication device receives the lock signal; and

wherein the battery charging control section determines the user to be close to a vehicle when the vehicular communication device receives the unlock signal.

11. A method for increasing a use availability of a vehicle requiring a charging operation to charge a battery thereof, the method comprising:

determining if the vehicle is stopped in a parking position sufficiently close to a battery charger to permit the charging operation to be performed;

determining whether a communication between a portable device and a communication unit associated with the battery charger is disabled for a specified period of time;

starting the charging operation if the communication between the portable device and the communication unit is disabled for the specified period of time; and

immediately stopping the charging operation if one of;

the communication between the portable device and the communication unit is enabled; and

an unlock request is received by the communication unit from the portable device to unlock the vehicle.