Control device for motor-driven vehicle

• US 7,610,124 B2
• Filed: 11/22/2006
• Issued: 10/27/2009
• Est. Priority Date: 11/24/2005
• Status: Expired due to Fees

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Shibutani, Atsushi, Wakashiro, Teruo
• Primary Examiner(s): Black; Thomas G
• Assistant Examiner(s): Kong; Sze-Hon
• Application Number:
  US11/603,062
• Publication Number:
  US 20070118255A1
• Time in Patent Office: 1,070 Days
• Field of Search: 320/146, 320/149
• US Class Current: 701/22
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• 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: B60W 2510/246 Temperature
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/917 with transmission for changing gear ratio
• CPC Class Codes: Y10T 137/4757 Battery or electrolytic cell replenishment

Abstract

A control device for a motor-driven vehicle, the control device includes: a zone determining unit that determines at least a normal use zone, a discharge zone, an over-discharge zone, a charge zone, and an over-charge zone; and a control unit controlling the motor by stipulating the charge and discharge power of the storage unit for each zone that is determined by the zone determining unit, setting the normal use zone to be in a predetermined range that includes a remaining capacity at which the discharge output according to the remaining capacity of the storage unit and the charge input according to the remaining capacity of the storage unit are equivalent, and making the discharge output and the charge input in the normal use zone to be a predetermined value regardless of the remaining capacity of the storage unit in the zone.

Claims

1. A control device for a motor-driven vehicle, the motor-driven vehicle comprising:

a motor and an electrical generator serving as power sources of the vehicle; and

a storage unit that stores electrical energy generated by an output of the electrical generator and regenerative energy that is obtained by regenerative operation of the motor when the vehicle decelerates and has characteristic of the discharge output increasing as a remaining capacity of the storage unit increases, and a charge input decreasing as the remaining capacity increases,

the control device comprising;

a zone determining unit that determines at least a normal use zone, a discharge zone in which the remaining capacity is less than the normal use zone, an over-discharge zone in which the remaining capacity is still less than the discharge zone and discharge control is prohibited, a charge zone in which the remaining capacity is greater than the normal use zone, and an over-charge zone in which the remaining capacity is still greater than the charge zone and charge control is prohibited; and

a control unit controlling the motor by stipulating the charge and discharge power of the storage unit for each zone that is determined by the zone determining unit,

setting the normal use zone to be in a predetermined range that includes a remaining capacity at which the discharge output according to the remaining capacity of the storage unit and the charge input according to the remaining capacity of the storage unit are equivalent, and

making the discharge output and the charge input in the normal use zone to be a predetermined value regardless of the remaining capacity of the storage unit in the zone.

2. The control device for a motor-driven vehicle according to claim 1, wherein the control unit charges the remaining capacity value that stops charging in the charge zone to a low charge side when the temperature of the storage unit is higher than a predetermined temperature.

3. The control device for a motor-driven vehicle according to claim 1, wherein the control unit makes the range of the normal use zone narrow when the temperature of the storage unit is lower than a predetermined temperature.

4. The control device for a motor-driven vehicle according to claim 1, wherein the control unit charges the remaining capacity value that stops the discharging in the discharge zone is changed to a high capacity side when the temperature of the storage unit is lower than a predetermined temperature.

5. The control device for a motor-driven vehicle according to claim 1, wherein the storage unit is a lithium-ion battery.