Mixed Two-Layer Balancing of Battery Packs for Electric Vehicles and Energy Storage Systems

Kristaps Vitols; Edgars Grinfogels; Ilya Galkin

doi:10.20944/preprints202401.0122.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 2 January 2024 / Approved: 3 January 2024 / Online: 3 January 2024 (10:04:42 CET)

Passive balancing is a traditional choice for lithium-ion battery packs although it is regarded as highly inefficient. One opportunity to improve traditional balancing in sub-medium size battery packs is to combine two balancing methods: passive and active. Statistical analysis have been performed to rationalize battery pack division in smaller packs and use of higher level selective charging method to decrease losses of passive balancing. An experimental balancing prototype have been designed and tested for efficiency. Results indicate energy performance degradation if cells of the pack are with low capacity variation. Proposed balancing approach could improve performance under high cell mismatch conditions.

lithium-ion; batteries; passive balancing; active balancing; cell balancing

Engineering, Electrical and Electronic Engineering

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Mixed Two-Layer Balancing of Battery Packs for Electric Vehicles and Energy Storage Systems

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