Estimation of cycling aging of lithium-ion batteries for photovoltaic applications

Nakama V.; Lafoz M.; Nájera J.; Sal Y Rosas D. · Journal of Physics: Conference Series (2022) · DOI: 10.1088/1742-6596/2180/1/012011

Resumen

The installation of photovoltaic microgrids to meet energy needs has had a significant increase in recent years. Likewise, the use of lithium batteries to improve the performance of the microgrid is an issue that is being studied. In this sense, it is important to know the electrical response of the lithium battery under such environment and its degradation. In this sense, this paper presents a methodology developed for the mathematical modelling of the electrical behaviour of a lithium battery. This methodology has been developed from the integration of three mathematical models: dynamic model, thermal model and aging model. During its operation, the lithium battery will be subjected to constant charging and discharging processes (dynamic model), as well as to thermal stress, because of the combined effect of the current flow and the ambient temperature (thermal model), which will generate a lithium battery capacity loss (aging model). For the analysis, real data on photovoltaic production, residential consumption profile, ambient temperature and 48V 100Ah LFP battery datasheet have been used. The developed methodology allows estimating the aging of a lithium battery in real time. © Published under licence by IOP Publishing Ltd.

Instituciones: Universidad Nacional de Ingeniería