Battery Batch Impedance Analysis for Pack Design

Vitols, Kristaps; Grinfogels, Edgars

doi:10.1109/aieee48629.2019.8976935

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Often research articles use exceedingly high misbalance conditions to emphasize losses of passive balancing [12]- [14]. However manufacturers' datasheets show that cell parameters nominally have dispersion less than 2% which is approved by measurements [15], [16]. If cells are sorted prior to pack assembly, even lower mismatch can be achieved which would result in lower need for balancing performance.…”

Section: Introductionmentioning

confidence: 99%

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

Vitols,

Grinfogels,

Galkin

2024

Preprint

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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.

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