Charge control device for vehicle and electric powered vehicle provided with same

• US 8,368,354 B2
• Filed: 06/08/2010
• Issued: 02/05/2013
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yamamoto, Masaya, Izumi, Junta, Endo, Hiroki
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US13/384,667
• Publication Number:
  US 20120268066A1
• Time in Patent Office: 973 Days
• Field of Search: 320/109, 320/104
• US Class Current: 320/109
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• 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 53/14 Conductive energy transfer
• CPC Class Codes: B60L 58/15 Preventing overcharging
• 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: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• 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 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 monitoring unit outputs a first current detection value having a relatively wide measurement range and a relatively short detection cycle and a second current detection value having a relatively high resolution, to a charging ECU. When charging power calculated using the first current detection value exceeds a predetermined limit value, the charging ECU controls a charger to reduce charging power (protection control). Further, the charging ECU controls the charger such that a power storage device attains a predetermined fully charged state based on charging power calculated using the second current detection value (full charge control).

Claims

1. A charge control device for a vehicle configured such that a rechargeable power storage device mounted on the vehicle can be charged by a power supply outside the vehicle, comprising:

a charger configured to convert electric power supplied from said power supply in voltage to charge said power storage device;

a current detection unit configured to detect a current input to said power storage device to output a first detection value having a first resolution and a second detection value having a second resolution higher than said first resolution; and

a control device controlling said charger based on said first and second detection values,

a range of said first detection value being wider than the range of said second detection value, and

a detection cycle of said first detection value being shorter than the detection cycle of said second detection value,

said control device including

a protection control unit controlling, when charging power calculated using said first detection value exceeds a predetermined limit value, said charger to reduce said charging power, and

a full charge control unit controlling said charger such that said power storage device attains a predetermined fully charged state, based on charging power calculated using said second detection value.

2. The charge control device for a vehicle according to claim 1, wherein said current detection unit includes

a sensor unit configured to output said first detection value, and

an amplifying unit multiplying said first detection value to output said second detection value.

3. The charge control device for a vehicle according to claim 1, wherein said current detection unit includes

a first current sensor configured to output said first detection value, and

a second current sensor configured to output said second detection value.

4. The charge control device for a vehicle according to claim 1, further comprising a voltage sensor for detecting a voltage of said power storage device, wherein

said full charge control unit controls said charger such that the charging power calculated using said second detection value is constant, and determines that said power storage device has attained the fully charged state when a detection value of said voltage sensor reaches a predetermined value.

5. The charge control device for a vehicle according to claim 1, further comprising an input unit for instructing full charge of said power storage device, wherein

when said input unit is operated, said full charge control unit controls said charger such that said power storage device attains the predetermined fully charged state, based on the charging power calculated using said second detection value.

6. An electric powered vehicle comprising:

the charge control device defined in claim 1; and

a motor generating a driving torque using electric power stored in a power storage device charged using said charge control device.