# State of charge estimation for LiFePO4 batteries joint by PID observer and improved EKF in various OCV ranges

> Research article (Applied Energy, 2024) · cited 91× · AI/ML

**Wikidata**: [openalex:W4402401906](https://www.wikidata.org/wiki/openalex:W4402401906)  
**Source**: https://4ort.xyz/entity/state-of-charge-estimation-for-lifepo4-batteries-joint-by-pid-observer-and-improved-ekf-in-various-ocv-ranges