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| Hauptseite > Publikationsdatenbank > A flexible battery testing framework for accelerated research on photovoltaic-battery modules and a representative test time series |
| Hauptseite > Publikationsdatenbank > A flexible battery testing framework for accelerated research on photovoltaic-battery modules and a representative test time series |
| Journal Article | FZJ-2026-04076 |
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2026
Elsevier
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.est.2026.124007 doi:10.34734/FZJ-2026-04076
Abstract: Surplus variable photovoltaic (PV) generation should be coupled to storage as close as possible to its point ofgeneration to minimize grid stress and infrastructure expansion. This can be achieved by electrically couplingand physically integrating batteries at the PV module level, an approach that has been shown to be feasible butrequires batteries adapted to PV-module-specic electrical and thermal operating conditions. In direct coupling,the battery current is set by the instantaneous interaction of PV and battery current-voltage characteristic, andthe thermal conditions are dominated by the PV module temperature. Existing battery testing methods do notfully address this requirement space for early-stage laboratory cells. Here, we present a exible battery testingframework that translates direct PV-battery coupling and PV-module thermal boundary conditions to laboratoryscalebatteries. The platform combines a software-controlled PV emulator with a programmable thermal chamberto expose batteries to scaled PV I-V characteristics and PV-module-equivalent temperature proles. It isdemonstrated using a Li-ion cell under a representative seven-day PV prole for Freiburg, Germany. Theemulator reproduces the target electrical conditions with cumulative charge and energy deviations of about1.5%, while the tested congurations show PV-battery coupling efciencies above 95%. The results demonstratethe platform's potential for screening laboratory-scale batteries by assessing relative PV-battery sizing, voltagematching, C-rate variation, state-of-charge swing, and direct-coupling behavior. The derived battery operatingtime series is also provided as a simplied proxy for preliminary screening on conventional battery cyclers.
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