ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,430, issued on Jan. 20, was assigned to Iontra Inc (Centennial, Colo.).

"Systems and methods for impedance measurement of a battery cell" was invented by Daniel A. Konopka (Denver), John Richard Howlett III (Centennial, Colo.) and Jeffrey J. Holt (Superior, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system is disclosed for determining complex impedance characteristics of one or more battery cells based on the charge signal applied, or to be applied, to the battery cell. Implementations may include measuring the impedance of a battery cell to, in some instances, determine a frequency component or harmonic that defines, at least a portion,...