Journal Article FZJ-2020-04838

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Online capacity estimation of lithium-ion batteries with deep long short-term memory networks

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2021
Elsevier New York, NY [u.a.]

Journal of power sources 482, 228863 - () [10.1016/j.jpowsour.2020.228863]

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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.

Classification:

Contributing Institute(s):
  1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)
Research Program(s):
  1. 113 - Methods and Concepts for Material Development (POF3-113) (POF3-113)

Appears in the scientific report 2021
Database coverage:
Medline ; Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND 4.0 ; OpenAccess ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
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Dokumenttypen > Aufsätze > Zeitschriftenaufsätze
Institutssammlungen > IMD > IMD-4
Workflowsammlungen > Öffentliche Einträge
IEK > IEK-12
Publikationsdatenbank
Open Access

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