# A Fast Lithium-Ion Battery Impedance and SOC Estimation Method Based on Two-Stage PI Observer

> Research article (World Electric Vehicle Journal, 2021) · cited 11× · AI/ML

**Wikidata**: [openalex:W3190126047](https://www.wikidata.org/wiki/openalex:W3190126047)  
**Source**: https://4ort.xyz/entity/a-fast-lithium-ion-battery-impedance-and-soc-estimation-method-based-on-two-stage-pi-observer