Abstract
The relationship between open-circuit voltage (OCV) and state of charge (SOC) of lithium-ion battery, as an important battery parameter, is widely used in battery state estimation and safety management. However, the hysteresis phenomenon, which makes it difficult to obtain the OCV-SOC curve. Firstly, the hysteresis behavior in ternary lithium battery is studied in detail for temperature, current rate, SOC and charge/discharge path. Based on the experimental data, the dependence of the hysteresis behavior is summarized and analyzed. Finally, an asymmetric hysteresis operator is proposed and a hysteresis model is established to accurately characterize the OCV-SOC relationship of the battery. The model was validated by experimental data with a maximum error of 0.0170 V and an absolute average error of 0.0063 V. The results show that the model can accurately characterize the battery hysteresis effect and has positive effects for battery condition estimation and safety management.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
