Parallel-Connected Battery Current Imbalance Dynamics

Autor:	Andrew Weng, Sravan Pannala, Jason B. Siegel, Anna G. Stefanopoulou
Rok vydání:	2022
Předmět:	Control and Systems Engineering FOS: Electrical engineering electronic engineering information engineering Systems and Control (eess.SY) Electrical Engineering and Systems Science - Systems and Control
Zdroj:	IFAC-PapersOnLine. 55:37-43
ISSN:	2405-8963
DOI:	10.1016/j.ifacol.2022.11.158
Popis:	In this work, we derive analytical expressions governing state-of-charge and current imbalance dynamics for two parallel-connected batteries. The model, based on equivalent circuits and an affine open circuit voltage relation, describes the evolution of state-of-charge and current imbalance over the course of a complete charge and discharge cycle. Using this framework, we identify the conditions under which an aged battery will experience a higher current magnitude and state-of-charge deviation towards the end of a charge or discharge cycle. This work enables a quantitative understanding of how mismatches in battery capacities and resistances influence imbalance dynamics in parallel-connected battery systems, helping to pave a path forward for battery degradation modeling in heterogeneous battery systems. 7 pages, 4 figures, conference paper (MECC 2022)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ded9347a11a16e3dcc0394d0200524e https://doi.org/10.1016/j.ifacol.2022.11.158 Zobrazit plný text záznamu