Enhanced Coulomb counting method with adaptive SOC reset time for estimating OCV

摘要

This paper presents a Coulomb counting algorithm using the estimating OCV through a short rest time, such as the traffic signal time. Proposed algorithm could enhance the SOC estimating accuracy through the frequent SOC reset using a greatly short rest time, even though SOC reset error occurs. Also algorithm is implemented for a highly accurate SOC estimation by a SOC error prediction, an improvement of required rest time for SOC reset and a compensation of SOC reset error. The proposed algorithm is verified by experiment using the UDDS profile and it is verified that it could improve the SOC estimation accuracy up to 2.07%.