Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Meinert Lewerenz"'
Publikováno v:
Batteries, Vol 10, Iss 1, p 3 (2023)
This paper provides a comprehensive exploration of float current analysis in lithium-ion batteries, a promising new testing method to assess calendar aging. Float currents are defined as the steady-state trickle charge current after a transient part.
Externí odkaz:
https://doaj.org/article/da0d744645e34dd1bafb09fbd33a629c
Publikováno v:
Energies, Vol 16, Iss 9, p 3889 (2023)
Self-discharge of lithium-ion cells leads to voltage decay over time. In this work, the self-discharge was measured at 30 ∘C for three cell types at various voltage levels for about 150 days in a constant voltage mode determining the current at a h
Externí odkaz:
https://doaj.org/article/edbb498039b24e708a0c4197b66ace6a
Publikováno v:
Batteries, Vol 9, Iss 4, p 230 (2023)
Accelerated cyclic aging tests are very important for research and industry to quickly characterize lithium-ion cells. However, the accentuation of stress factors and the elimination of rest periods lead to an apparent capacity fade, that can be subs
Externí odkaz:
https://doaj.org/article/802288dae0454a32aa5a9e1a94dafd50
Autor:
Xenia Straßer, Guy Williams Ngaleu, Christian Hanzl, Mohamed Azzam, Christian Endisch, Meinert Lewerenz
Publikováno v:
Batteries, Vol 9, Iss 2, p 139 (2023)
An AC-battery or multilevel inverter used to increase safety and flexibility is realizable by switching the cells and modules on and off in a defined way and thus can replace the bidirectional converter. Assessing possible additional aging due to swi
Externí odkaz:
https://doaj.org/article/e2f164a7941f4721a2be90f33782cbb1
Autor:
Guy Williams Ngaleu, Michael Theiler, Xenia Straßer, Christian Hanzl, Lidiya Komsiyska, Christian Endisch, Meinert Lewerenz
Publikováno v:
Batteries, Vol 8, Iss 4, p 33 (2022)
For intelligent battery systems that are able to control the current flow for each individual cell, the multilevel inverter is an interesting approach to replace the bidirectional AC/DC-converter and improve flexibility of charging system and signal
Externí odkaz:
https://doaj.org/article/80eaa5c90ffb4175ae905e23da966a23
Autor:
Lidiya Komsiyska, Tobias Buchberger, Simon Diehl, Moritz Ehrensberger, Christian Hanzl, Christoph Hartmann, Markus Hölzle, Jan Kleiner, Meinert Lewerenz, Bernhard Liebhart, Michael Schmid, Dominik Schneider, Sascha Speer, Julia Stöttner, Christoph Terbrack, Michael Hinterberger, Christian Endisch
Publikováno v:
Energies, Vol 14, Iss 18, p 5989 (2021)
This review provides an overview of new strategies to address the current challenges of automotive battery systems: Intelligent Battery Systems. They have the potential to make battery systems more performant and future-proof for coming generations o
Externí odkaz:
https://doaj.org/article/388a019c978a478da595b0dd472cc499
Publikováno v:
Batteries, Vol 7, Iss 2, p 22 (2021)
Float currents are steady-state self-discharge currents after a transient phase—caused by anode overhang, polarization, etc.—is accomplished. The float current is measured in this study with a standard test bench for five 18650 cells (Samsung 25R
Externí odkaz:
https://doaj.org/article/08afa79760af428ba8bb463a160bb8f7
Autor:
Michaela Winter, Dirk Uwe Sauer, Meinert Lewerenz, Zeyu Ma, Jiuchun Jiang, Jan Becker, Sijia Liu
Publikováno v:
Energy. 173:1041-1053
Lithium-ion batteries with Li4Ti5O12 (LTO) negative electrodes have been recognized as a promising candidate over graphite-based batteries for the future energy storage systems (ESS), due to its excellent performance in rate capability, cycle life an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6612c0a096d1cbb2cb48c6775012a31
https://doi.org/10.1016/j.energy.2019.02.150
https://doi.org/10.1016/j.energy.2019.02.150
Autor:
Meinert Lewerenz, Dirk Uwe Sauer
Publikováno v:
Journal of energy storage 18, 421-434 (2018). doi:10.1016/j.est.2018.06.003
Cyclic aging tests of 20 compressed prismatic automotive Li(NiMnCo)O2|Graphite cells are evaluated. The shallow cyclic aging tests are conducted around five average SOCs with respect to the anode. The cells are cycled at two DODs and two C-rates. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e44d0c61a3db25366d519d9606f30fab
https://doi.org/10.1016/j.est.2018.06.003
https://doi.org/10.1016/j.est.2018.06.003
Publikováno v:
Journal of energy storage 18, 149-159 (2018). doi:10.1016/j.est.2018.04.029
Calendar aging tests are presented quantifying the reversible capacity loss caused by lithium migration from the active part to the overhang of the anode. Based on these tests, capacity loss at five different SOCs with respect to the anode is evaluat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12cf2d43689692f67b7818ab4999913e
https://doi.org/10.1016/j.est.2018.04.029
https://doi.org/10.1016/j.est.2018.04.029