| Hauptseite > Publikationsdatenbank > Online capacity estimation of lithium-ion batteries with deep long short-term memory networks |
| Journal Article | FZJ-2020-04838 |
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2021
Elsevier
New York, NY [u.a.]
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Please use a persistent id in citations: http://hdl.handle.net/2128/26371 doi:10.1016/j.jpowsour.2020.228863
Abstract: There is an increasing demand for modern diagnostic systems for batteries under real-world operation, specificallyfor the estimation of their state of health, for example, via their remaining capacity. The online estimationof the capacity of a cell is challenging due to the dynamic nature of cell aging and the limited variety of inputsavailable from a cell under operation. The scope of this work is the development of a data-driven capacityestimation model for cells under real-world working conditions with recurrent neural networks having longshort-term memory capability. Voltage-time sensor data from the partial constant current phase charging curve isused as input, reflecting input availability in the real world. The network achieves a best-case mean absolutepercentage error of 0.76% and is extremely robust while handling input noise. It also has the ability to handlevariations in the length of the input time series and can generate a viable estimation even with an incompletecollection of input due to sensor errors. The model validation with several scenarios is done in a local embeddeddevice, highlighting the use case of such models in future battery management systems.
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