System, method, and article of manufacture for determining an estimated battery state vector

• US 7,656,123 B2
• Filed: 10/01/2008
• Issued: 02/02/2010
• Est. Priority Date: 11/10/2005
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Plett, Gregory L
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): Diao; M'Baye
• Application Number:
  US12/243,616
• Publication Number:
  US 20090037125A1
• Time in Patent Office: 489 Days
• Field of Search: 320/132, 320/127, 320/128, 320/149, 320/DIG.21, 324/430, 324/433, 324/427, 324/434, 702/63, 702/64, 702/65, 702/83, 702/111, 702/146, 702/147, 702/181, 702/182, 702/190, 702/191, 702/192, 702/193, 702/194, 702/195, 702/199
• US Class Current: 320/132
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A system, a method, and an article of manufacture for determining an estimated battery state vector indicative of a state of a battery are provided. The method determines a first estimated battery state vector indicative of the state of the battery at a first predetermined time based on a plurality of predicted battery state vectors, a plurality of predicted battery output vectors, and a first battery output vector.

Claims

1. An article of manufacture, comprising:

a computer storage medium having a computer program encoded therein for determining an estimated battery state vector indicative of a state of a battery at a first predetermined time, the computer storage medium comprising;

code for determining a first plurality of estimated augmented battery state vectors that are indicative of a state of the battery, a battery input noise, a sensor noise, an uncertainty of the state of the battery, an uncertainty of the battery input noise, and an uncertainty of the sensor noise at a second predetermined time prior to the first predetermined time;

code for determining a second plurality of predicted battery state vectors that are indicative of the state of the battery and an uncertainty of the state of the battery at the first predetermined time based on the first plurality of estimated augmented battery state vectors;

code for determining a third plurality of predicted battery output vectors that are indicative of at least one output variable of the battery and of an uncertainty of the output variable at the first predetermined time based on the first plurality of estimated augmented battery state vectors and the second plurality of predicted battery state vectors;

code for determining a first battery output vector having at least one measured value of a battery output variable; and

code for determining a first estimated battery state vector indicative of the state of the battery at the first predetermined time based on the second plurality of predicted battery state vectors, the third plurality of predicted battery output vectors, and the first battery output vector.

2. The article of manufacture of claim 1, wherein the code for determining the first estimated battery state vector comprises:

code for determining a first predicted battery state vector indicative of the state of the battery at the first predetermined time based on the second plurality of predicted battery state vectors;

code for determining a first predicted battery output vector indicative of at least one output variable of the battery at the first predetermined time based on the third plurality of predicted output vectors;

code for determining a gain matrix based on the first predicted battery state vector, the first predicted battery output vector, the second plurality of predicted battery state vectors, and the third plurality of predicted battery output vectors; and

code for calculating the first estimated battery state vector based on the first predicted battery state vector, the first predicted battery output vector, the gain matrix, and the first battery output vector.