SELECTIVE UPDATING OF BATTERY PARAMETER ESTIMATIONS

• US 20140266059A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Abandoned Application

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: LI, YONGHUA, WANG, XU
• Application Number:
  US13/829,391
• Publication Number:
  US 20140266059A1
• Time in Patent Office: Days
• US Class Current: 320/132
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/24 by lever actuation
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2260/44 by parameter estimation
• 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 58/12 responding to state of charge [SoC]
• 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 vehicle is provided with an electric machine that is configured to provide drive torque, and a battery for supplying power to the electric machine. The vehicle also includes a controller that is configured to estimate present battery parameters based on input indicative of the power supplied by the battery. The controller is also configured to generate output indicative of battery power capability based on the input and prior battery parameters in response to a rate of change of a component of the power being less than a lower boundary.

Claims

1. A vehicle comprising:

an electric machine configured to provide drive torque;

a battery for supplying power to the electric machine; and

a controller configured to;

estimate present battery parameters based on input indicative of the power supplied by the battery; and

generate output indicative of battery power capability based on the input and prior battery parameters in response to a rate of change of a component of the power being less than a lower boundary.

2. The vehicle of claim 1 wherein the controller is further configured to:

generate battery estimations using a predictive filter;

update the present battery parameters with the battery estimations in response to the rate of change of the component of the power being greater than an upper boundary; and

bypass the battery estimations and reference the prior battery parameters in response to the rate of change of the component of the power being less than a lower boundary, wherein the upper boundary is greater than the lower boundary.

3. The vehicle of claim 1 wherein the controller is further configured to:

receive input indicative of a battery voltage and a battery current; and

generate the output indicative of the battery power capability based on the input and the prior battery parameters in response to a product of the battery voltage and the battery current being less than a power lower boundary.

4. The vehicle of claim 1 wherein the controller is further configured to:

receive input indicative of a battery voltage; and

generate the output indicative of the battery power capability based on the input and the prior battery parameters in response to an absolute value of a rate of change of the battery voltage being less than a battery voltage derivative lower boundary.

5. The vehicle of claim 1 wherein the controller is further configured to:

receive input indicative of a battery current; and

generate the output indicative of the battery power capability based on the input and the prior battery parameters in response to an absolute value of a rate of change of the battery current being less than a battery current derivative lower boundary.

6. The vehicle of claim 1 wherein the controller is further configured to:

receive input indicative of a battery current; and

generate the output indicative of the battery power capability based on the input and the prior battery parameters in response to an absolute value of the battery current being less than a current lower boundary.

7. A vehicle system comprising:

a battery for supplying power; and

a controller configured to;

receive a first input indicative of first battery power;

receive a second input indicative of second battery power; and

generate output indicative of battery power capability based on the second input and prior battery parameters based on the first input, in response to a rate of change of a component of the second input being less than a lower boundary.

8. The vehicle system of claim 7 wherein the second input includes a second voltage and a second current, and wherein the controller is further configured to:

generate the output indicative of battery power capability based on the second input and present battery parameters based on the second input, in response to a product of the second voltage and the second current being greater than a power upper boundary.

9. The vehicle system of claim 8 wherein the controller is further configured to:

generate the output indicative of battery power capability based on the second input and the present battery parameters in response to an absolute value of a rate of change of the second voltage being greater than a voltage derivative upper boundary.

10. The vehicle system of claim 9 wherein the controller is further configured to:

generate the output indicative of battery power capability based on the second input and the present battery parameters in response to an absolute value of a rate of change of the second current being greater than a current derivative upper boundary.

11. The vehicle system of claim 10 wherein the controller is further configured to:

generate the output indicative of battery power capability based on the second input and the present battery parameters in response to an absolute value of the second current being greater than a current upper boundary; and

generate the output indicative of battery power capability based on the second input and the prior battery parameters in response to an absolute value of the second current being less than a current lower boundary, wherein the current upper boundary is greater than the current lower boundary.

12. The vehicle system of claim 8 wherein the controller is further configured to:

generate the output indicative of the battery power capability based on the second input and the prior battery parameters in response to a product of the second voltage and the second current being less than a power lower boundary.

13. The vehicle system of claim 8 wherein the controller is further configured to:

generate the output indicative of the battery power capability based on the second input and the prior battery parameters in response to an absolute value of a rate of change of the second voltage being less than a voltage derivative lower boundary.

14. The vehicle system of claim 8 wherein the controller is further configured to:

generate the output indicative of the battery power capability based on the second input and the prior battery parameters in response to an absolute value of a rate of change of the second current being less than a current derivative lower boundary.

15. A method for controlling a hybrid vehicle, the method comprising:

receiving a first input indicative of first battery power;

receiving a second input indicative of second battery power; and

calculating a battery power capability based on the second input and an estimate of first battery ECM parameters based on the first input, in response to a rate of change of a component of the second input being less than a lower boundary.

16. The method of claim 15 wherein the second input includes a second voltage and a second current, the method further comprising:

calculating the battery power capability based on the second input and second battery ECM parameters based on the second input, in response a product of the second voltage and the second current being greater than a power upper boundary.

17. The method of claim 16 further comprising:

calculating the battery power capability based on the second input and the first battery ECM parameters in response to a product of the second voltage and the second current being less than a power lower boundary, wherein the power lower boundary is less than the power upper boundary.

18. The method of claim 15 wherein the second input includes a second voltage and a second current, the method further comprising:

calculating the battery power capability based on the second input and the first battery ECM parameters in response to an absolute value of a rate of change of the second voltage being less than a battery voltage derivative lower boundary.

19. The method of claim 15 wherein the second input includes a second voltage and a second current, the method further comprising:

calculating the battery power capability based on the second input and the first battery ECM parameters in response to an absolute value of a rate of change of the second current being less than a battery current derivative lower boundary.

20. The method of claim 15 wherein the second input includes a second voltage and a second current, the method further comprising:

calculating the battery power capability based on the second input and the first battery ECM parameters in response to an absolute value of the second current being less than a current lower boundary.