ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,556,021, issued on Feb. 17, was assigned to Black & Decker Inc. (New Britain, Conn.).
"System and method for charging a battery pack" was invented by William Rigdon (Baltimore) and Lisa M. King (Towson, Md.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device includes an AC impedance circuit to apply an AC excitation signal to a set of battery cells of a battery pack. The device includes a controller to determine a battery pack identification (ID) value from a battery pack identification (ID) circuit of the battery pack, calculate an impedance value of the battery pack based on the AC excitation signal, identify a maximum charging rate to charge the ...