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 |
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.
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