US 7,321,220 B2
Method for calculating power capability of battery packs using advanced cell model predictive techniques
Gregory L. Plett, Colorado Springs, Colo. (US)
Assigned to LG Chem, Ltd., (Korea, Republic of)
Filed on Mar. 25, 2004, as Appl. No. 10/811,088.
Claims priority of provisional application 60/524326, filed on Nov. 20, 2003.
Prior Publication US 2005/0110498 A1, May 26, 2005
Int. Cl. H02J 7/00 (2006.01); H02J 7/16 (2006.01); G01N 27/416 (2006.01)
U.S. Cl. 320—128  [320/134; 320/132; 320/116; 320/149; 324/426] 7 Claims
OG exemplary drawing
 
1. A method for estimating a maximum discharge power of a battery, comprising:
generating a signal indicative of a present state-of-charge of said battery, utilizing a sensor;
calculating said present state-of-charge of said battery based on said signal, utilizing an arithmetic circuit operably coupled to said sensor;
calculating a maximum discharge current of said battery utilizing said arithmetic circuit based on at least a minimum state of charge limit associated with said battery, said present state of charge of said battery a minimum voltage limit associated with said battery, and of a cell model that is solved by a Taylor series expansion of an open cell voltage of the battery to determine a future output voltage at the battery, such that the future output voltage of said battery does not fall below said minimum voltage limit and a future state-of-charge of said battery does not fall below said minimum state-of-charge limit associated with said battery; and,
calculating said maximum discharge power based on said maximum discharge current value, utilizing said arithmetic circuit.