Predicting electrochemical element load capacity involves correcting equivalent circuit input voltage w.r.t measured voltage using function with logarithmic current dependency as nonlinear term

摘要

The method involves measuring accumulator current, voltage and temperature, comparing with those for an equivalent circuit, varying equivalent circuit component parameters to get a match and drawing load capacity conclusions from the variations. The equivalent circuit input voltage is corrected for measured battery voltage using a function with only current, voltage and temperature as variables and a logarithmic current dependency nonlinear term.