VEHICULAR CHARGING SYSTEM

• US 20110227534A1
• Filed: 10/28/2008
• Published: 09/22/2011
• Est. Priority Date: 11/28/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Mitsutani, Noritake
• Granted Patent: US 8,368,347 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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

Abstract

A charging ECU causes a charger to perform quick charging until a state of charge of a power storage device reaches a predetermined state. The charging ECU causes the charger to perform additional charging during which charging progresses more slowly than the quick charging, when the state of charge comes closer to full charge than the predetermined state. The charging ECU stops charging of the power storage device by the charger when the state of charge of the power storage device reaches a charging stop threshold value during the additional charging, and stops charging of the power storage device by the charger when a time of the additional charging exceeds a predetermined time even if the state of charge of the power storage device does not reach the charging stop threshold value.

Claims

1. A vehicular charging system charging a vehicle-mounted power storage device, comprising:

a charger configured to be supplied with electric power from a power supply outside a vehicle to charge said power storage device;

a sensor for detecting a state of charge of said power storage device; and

a charging control device for controlling said charger, wherein

said charging control device causes said charger to perform quick charging until said state of charge of said power storage device reaches a predetermined state, and causes said charger to perform additional charging during which charging progresses more slowly than said quick charging, when said state of charge comes closer to full charge than said predetermined state, and

said charging control device stops charging of said power storage device by said charger when said state of charge of said power storage device reaches a charging stop threshold value during said additional charging, and stops charging of said power storage device by said charger when a time of said additional charging exceeds a predetermined time even if said state of charge of said power storage device does not reach said charging stop threshold value.

2. The vehicular charging system according to claim 1, wherein

said quick charging is charging during which said charger is controlled such that charging power is constant, and

said additional charging is charging during which said charger is controlled such that charging voltage supplied to said power storage device is constant.

3. The vehicular charging system according to claim 1, wherein

said vehicle includes

a vehicle driving motor operated by receiving electric power from said power storage device, and

an internal combustion engine used together with said motor to drive the vehicle.

4. A vehicular charging system charging a vehicle-mounted power storage device, comprising:

a charger configured to be supplied with electric power from a power supply outside a vehicle to charge said power storage device;

a sensor for detecting a state of charge of said power storage device; and

a charging control device for controlling said charger, wherein

said charging control device stops charging of said power storage device from outside said vehicle when a predetermined stop condition is satisfied during charging of said power storage device from outside said vehicle,

said charging control device calculates a first value based on an amount of electric energy required to charge said power storage device from a present state of charge to an upper limit value of the state of charge of said power storage device, in consideration of charging efficiency of said charger, and calculates a second value based on an amount of consumed fuel corresponding to a distance that can be traveled using the electric energy required to charge said power storage device from said present state of charge to said upper limit value of the state of charge of said power storage device, and

said stop condition includes a condition that said first value becomes larger than said second value.

5. The vehicular charging system according to claim 4, wherein

said vehicle includes

a vehicle driving motor operated by receiving electric power from said power storage device, and

an internal combustion engine used together with said motor to drive the vehicle.