ALEXANDRIA, Va., April 7 -- United States Patent no. 12,596,155, issued on April 7, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Device and method for determining state of battery pack" was invented by Yuki Imade (Okazaki, Japan) and Tsubasa Migita (Chiryu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A parameter ratio that is a ratio of a parameter of a parallel-cell block to be determined to an average value of parameters of a plurality of parallel-cell blocks is calculated, a moving-average value of the parameter ratio is obtained, and a state of the parallel-cell block to be determined is determined based on an index value that is a difference between the parameter of the parallel-cell b...