Electrical Vehicle Energy System and Operating Method Thereof

• US 20120150372A1
• Filed: 05/09/2011
• Published: 06/14/2012
• Est. Priority Date: 12/14/2010
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Sean, Wu-Yang, Chiang, Yi-Hsien
• Granted Patent: US 8,723,474 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An electric vehicle energy system is provided. The electrical vehicle energy system includes an electrical control unit used for producing the electric vehicle mode according to the external input signals. The electrical vehicle energy further includes an energy storage system used for producing a motor control signal according to an electric vehicle mode. The power loop structure includes at least a first power module and a second power module. The structure further includes at least a first detector and a second detector used for producing a first detecting signal and a second detecting signal according to the first power module and the second power module. The power loop structure further includes an energy storage controller used for producing the plurality of switch control signals according to the electric vehicle mode, the first detecting signal and the second detecting signal through a control area network by a voltage-difference hysteresis operation.

Claims

1. An electric vehicle energy system, comprising:

an electrical control unit, for producing the electric vehicle mode according to the external input signals;

an energy storage system, for producing a motor control signal according to an electric vehicle mode, used for controlling a power loop structure, wherein the power loop structure comprises;

at least a first power module and a second power module;

at least a first detector and a second detector, coupled to the first power module and the second power module, for producing a first detecting signal and a second detecting signal respectively according to the first power module and the second power module; and

an energy storage controller, coupled to the electrical control unit, for producing the plurality of switch control signals according to the electric vehicle mode, the first detecting signal and the second detecting signal through a control area network (CAN) by a voltage-difference hysteresis operation.

2. The electric vehicle energy system as claimed in claim 1, wherein the electric vehicle mode comprises a driving mode, a regeneration mode, a starting mode, and a charging mode.

3. The electric vehicle energy system as claimed in claim 2, wherein the energy storage controller forms the plurality of switch control signals of a first control mode or a third control mode according to the driving mode and the hysteresis operations, the energy storage controller forms the plurality of switch control signals of a second control mode according to the regeneration mode, the energy storage controller forms the plurality of switch controller signals of the third control mode according to the starting mode and the differential operation, and the energy storage controller forms the plurality of switch control signals of the first control mode or the third control mode according to the charging mode and the hysteresis operation.

4. The electric vehicle energy system as claimed in claim 3, wherein the first and the second power module regenerates power according to the plurality of switch control signals of the second control mode or the third control mode, and the first and the second power module periodically and alternately provides power according to the plurality of switch control signals of the first control mode.

5. The electric vehicle energy system as claimed in claim 1, wherein the first power module comprises a first battery connected to a first super capacitor in series and the second power module comprises a second super capacitor connected to a second battery in series, wherein the first battery is coupled to the second super capacitor in parallel and the second battery is coupled to the first super capacitor in parallel.

6. The electric vehicle energy system as claimed in claim 4, wherein the energy storage system further comprises:

a first switch, coupled to the first power module and the energy storage controller; and

a second switch, coupled to the second power module and the energy storage controller,

wherein the first switch and the second switch are turned on according to the plurality of switch control signals of the third control mode such that the first battery and the second battery charge the first capacitor and the second capacitor;

wherein the first switch and the second switch are alternately turned on and off according to the plurality of switch control signals of the first control mode such that when the first power module provides power, the second power module does not provide power, and when the second power module provides power, the first power module does not provide power; and

wherein the first switch and the second switch are turned off according to the plurality of switch control signals of the second mode such that the first super capacitor and the second super capacitor are charged.

7. The electric vehicle energy system as claimed in claim 5, wherein the energy storage system further comprises a current limiter and a third switch disposed between the first power module and the second power module, and the current limiter and the third switch are activated according to the plurality of switch control signals of the second control mode or the third control mode.

8. The electric vehicle energy system as claimed in claim 5, further comprising:

a current limiter and a third switch disposed between the first power module and the second power module, wherein the current limiter and the third switch are activated according to the plurality of switch control signals of the third control mode; and

a fourth switch, connected to the current limiter in parallel, wherein the fourth switch is turned on according to the plurality of switch control signals of non-third control mode.

9. The electric vehicle energy system as claimed in claim 7, wherein the energy storage system further comprises:

a driver, coupled to the energy storage controller, for producing a plurality of energy storage driving signals, according to the plurality of switch control signals, used for driving the first switch, the second switch and the third switch.

10. The electric vehicle energy system as claimed in claim 8, wherein the energy storage system further comprises:

a driver, coupled to the energy storage controller for producing a plurality of energy storage driving signals, according to the plurality of switch control signals, used for driving the first switch, the second switch, the third switch and the fourth switch.

11. The electric vehicle energy system as claimed in claim 9, wherein the driver comprises a photo coupler.

12. The electric vehicle energy system as claimed in claim 1, further comprising:

a motor driving circuit, coupled to the motor for transforming a direct current voltage into an alternating current voltage to drive the motor according to the motor control signal; and

an electrolytic capacitor, electrically connected to the motor driving circuit in parallel for absorbing direct current pulses.

13. The electric vehicle energy system as claimed in claim 1, wherein the motor comprises a three phase alternating current motor.

14. A method for operating an electric vehicle energy system, comprising:

producing the electric vehicle mode according to the external input signals by an electronic control unit;

producing a first detecting signal and a second detecting signal respectively according to a first power module and a second power module by a first detector and a second detector;

producing the plurality of control signals according to the electric vehicle mode, the first detecting signal and the second detecting signal using a voltage-difference hysteresis operation by an energy storage controller; and

intermittently providing power or regenerating power according to a plurality of switch control signals by at least a first power module and a second power module.

15. The method for operating an electric vehicle energy system as claimed in claim 14, wherein producing the plurality of switch control signals comprises:

forming the plurality of switch control signals of a first control mode or a third control mode according to the driving mode and the hysteresist operation by the energy storage controller;

forming the plurality of switch control signals of a second control mode according to the regeneration mode by the energy storage controller;

forming the plurality of switch controller signals of the third control mode according to the starting mode and the differential operation by the energy storage controller; and

forming the plurality of switch control signals of the first control mode or the third control mode according to the charge mode and the hysterises operation by the energy storage controller.

16. The method for operating an electric vehicle energy system as claimed in claim 15, wherein intermittently providing power or regenerating power comprises:

regenerating power according to the plurality of switch control signals of the second control mode or the third control mode by the first power module and the second power module; and

periodically and alternately providing power according to the plurality of switch control signals of the first control mode by the first power module and the second power module.

17. The method for operating an electric vehicle energy system as claimed in claim 15, wherein intermittently providing power or regenerating power comprises:

turning on a first switch and a second switch according to the plurality of switch control signals of the third control mode such that the first battery and the second battery charge the first super capacitor and the second super capacitor;

alternately turning on and off the first switch and the second switch according to the plurality of switch control signals of the first control mode such that when the first power modules provides power, the second power module does not provide power, and when the second power module provides power, the first power module does not provide power; and

turning off the first switch and the second switch according to the plurality of switch control signals of the second mode such that the first super capacitor and the second super capacitor are charged.

18. The method for operating an electric vehicle energy system as claimed in claim 17, further comprising:

activating a current limiter and a third switch according to the plurality of switch control signals of the second control mode or the third control mode.

19. The method for operating an electric vehicle energy system as claimed in claim 17, further comprising:

activating a current limiter and a third switch according to the plurality of switch control signals of the third control mode; and

turning on a fourth switch according to the plurality of switch control signals of non-third control mode.

20. The method for operating an electric vehicle energy system as claimed in claim 18, further comprising:

producing a plurality of energy storage driving signals according to the plurality of switch control signals by a driver, used for driving the first switch, the second switch and the third switch.

21. The method for operating an electric vehicle energy system as claimed in claim 19, further comprising:

producing a plurality of energy storage driving signals according to the switch control signals by a driver, used for driving the first switch, the second switch, the third switch and the fourth switch.