IEEE Applied Power Electronics Conference and Exposition - APEC 2023, Orlando (United States of America). 19-23 March 2023
Summary:
Battery energy storage systems (BESS) are fre-quently utilized to support the power grid. Second-Life batteries (SLBs) are considered as a potential solution to reduce the cost of BESS in stationary applications. However, using SLBs has certain challenges due to the non-uniform State-of-Charge (SOC) and State-of-Health (SOH) among the battery modules. This study examines two control strategies for a cascaded H-bridge (CHB) topology used for BESS applications. The possibilities for flexible control of the BESS are enabled by employing a CHB topology. By utilizing the CHB topology, each battery module can be individually charged and discharged. Two battery energy management system (BEMS) techniques are proposed based on the batteries' State-of-Energy (SOE): 1) continuous and 2) discrete balancing techniques. The experimental tests demonstrate the advantages of the proposed solutions in terms of individual balancing control when being applied to SLB.
Spanish layman's summary:
Las baterías de segunda vida se están convirtiendo en un medio de almacenamiento de energía en áreas residenciales. Sin embargo, su uso tiene inconvenientes debido a los diferentes estados de las baterías. Este estudio examina dos estrategias de control para la segunda vida útil de baterías.
English layman's summary:
Second-life batteries (SLBs) are becoming a desirable BESS substitute as the market for electric vehicles expands quickly. However, using SLBs has drawbacks because of the batteries' varying states. This study examines two control strategies for a cascaded H-bridge topology used for SLBs.
Keywords: Second-Life batteries, Cascaded H-Bridge, State-of-Energy, battery balancing.
DOI: 
https://doi.org/10.1109/APEC43580.2023.10131402
Published in APEC 2023, pp: 1-6, ISBN: 978-1-6654-7540-2
Publication date: 2023-05-31.
Citation:
J. Suárez-Porras, D. Stroe, A. Sangwongwanich, State-of-energy balancing control with cascaded H-bridge for second-life batteries, IEEE Applied Power Electronics Conference and Exposition - APEC 2023, Orlando (United States of America). 19-23 March 2023. In: APEC 2023: Conference proceedings, ISBN: 978-1-6654-7540-2
