Vehicle controller that stably supplies power to a battery and method thereof

• US 20040070353A1
• Filed: 09/03/2003
• Published: 04/15/2004
• Est. Priority Date: 10/09/2002
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Tajima, Yoichi, Kayukawa, Atsushi, Kobayashi, Yasuhiko, Murase, Yoshitaka, Nakamori, Yukinori
• Granted Patent: US 7,019,472 B2
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 2240/662 Temperature
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60L 7/20 Braking by supplying regenerated power to the prime mover of vehicles comprising engine-driven generators
• CPC Class Codes: B60W 10/00 Conjoint control of vehicle sub-units of different type or different function for propulsion of purely electrically-propelled vehicles with power supplied within the vehicle B60L50/00 - B60L58/00
• 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 2050/0002 Automatic control, details of type of controller or control system architecture
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2510/246 Temperature
• CPC Class Codes: B60W 2510/285 Temperature
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• 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 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A vehicle and method of operating a vehicle including a motor that supplies a driving force to a wheel, a battery that supplies electric power to the motor and receives regenerative electric power from the motor and a controller that detects a state of the battery and sets, based on a detected state of the battery, a first upper limit value and a first lower limit value for a voltage value and an electric current value that is output from the battery to the motor, and a second upper limit value and second lower limit value for the voltage value and the electric current value that is input from the regenerative electric power to the battery.

Claims

1. A vehicle, comprising:

a motor that supplies a driving force to a wheel;

a battery that supplies electric power to the motor and receives regenerative electric power from the motor; and

a controller that;

detects a state of the battery; and

sets, based on a detected state of the battery, a first upper limit value and a first lower limit value for a voltage value and an electric current value that is output from the battery to the motor, and a second upper limit value and second lower limit value for the voltage value and the electric current value that is input from the regenerative electric power to the battery.

2. The vehicle according to claim 1, wherein the upper limit values and the lower limit values are changed for every control relating to driving the motor.

3. The vehicle according to claim 1, wherein the controller detects at least one of a deteriorating state of the battery and a temperature having an influence on a performance of the battery as the detected state of the battery.

4. The vehicle according to claim 3, wherein the controller has a plurality of limit value maps having limit values set in advance, stores every control relating to the motor that is driven in accordance with high and low degrees of the battery deteriorating state and high and low degrees of an outside air temperature or a battery temperature, and selects a limit value map corresponding to the control to be executed from the plurality of limit value maps.

5. The vehicle according to claim 1, wherein a torque of the motor is controlled in accordance with the limit value.

6. The vehicle according to claim 1, wherein the upper limit values and the lower limit values are changed for at least one of a starting control, stoppage control, charging control, assist control and regenerative control that relate to driving the motor.

7. The vehicle according to claim 1, wherein the controller, in setting the limit values, performs a proportional operation for outputting a value proportional to an input amount and an integrating operation for outputting an integrating value of the input amount and an adjustment is made such that an operating amount becomes an amount proportional to a deviation between a target value and a present value.

8. A method of operating a vehicle with a motor that supplies a driving force to a wheel and a battery that supplies electric power to the motor and receives regenerative electric power from the motor, comprising:

detecting a state of the battery; and

setting, based on a detected state of the battery, a first upper limit value and a first lower limit value for a voltage value and an electric current value that is output from the battery to the motor, and a second upper limit value and second lower limit value for the voltage value and the electric current value that is input from the regenerative electric power to the battery.

9. The method of claim 8, wherein the upper limit values and the lower limit values are changed for every control relating to driving the motor.

10. The method of claim 8, further comprising:

detecting at least one of a deteriorating state of the battery and a temperature having an influence on a performance of the battery as the detected state of the battery.

11. The method of claim 10, further comprising:

setting, in advance, a plurality of limit value maps having limit values;

storing every control relating to the motor that is driven in accordance with high and low degrees of the battery deteriorating state and high and low degrees of an outside air temperature or a battery temperature; and

selecting a limit value map corresponding to the control to be executed from the plurality of limit value maps.

12. The method of claim 8, wherein a torque of the motor is controlled in accordance with the limit value.

13. The method of claim 8, wherein the upper limit values and the lower limit values are changed for at least one of a starting control, stoppage control, charging control, assist control and regenerative control that relate to driving the motor.

14. The method of claim 8, wherein when limit values are set, further comprising:

performing a proportional operation for outputting a value proportional to an input amount; and

performing an integrating operation for outputting an integrating value of the input amount, wherein an adjustment is made such that an operating amount becomes an amount proportional to a deviation between a target value and a present value.