OCV characteristic estimation method and OCV characteristic estimation device

摘要

PROBLEM TO BE SOLVED: To suppress underestimation in estimation of OCV characteristics of a lithium primary battery. SOLUTION: A discharge control step of intermittently discharging a lithium primary battery 2 with a predetermined discharge current i, a voltage acquisition step of acquiring a terminal voltage VL in the discharge pause period, and a terminal voltage VL in the discharge pause period are approximated by a logarithmic function. DOD and OCV, including an approximation step of estimating the OCV of the lithium primary battery 2 based on a logarithmic function, an OCV estimation step of estimating the discharge current i in the discharge period, and a discharge depth calculation step of calculating the DOD. An OCV characteristic estimation method that estimates the correspondence with and as an OCV characteristic. [Selection diagram] Fig. 2