Výsledky vyhledávání - "Birger Fricke"

Measurement of the current distribution in a direct methanol fuel cell—Confirmation of parallel galvanic and electrolytic operation within one cell

Autor: Thorsten Baumhöfer, Tilman Sanders, Klaus Wippermann, Birger Fricke, Andrei Kulikovsky, Dirk Uwe Sauer, Heinz Schmitz, Jürgen Mergel

Publikováno v: Journal of Power Sources. 176:477-483

Current production in fuel cells is typically unequally distributed along the cell surface due to inhomogeneous concentration of reactants and temperature. The inhomogeneities in fuel cells can result in reduced output power and accelerated ageing. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::044a93ca33879735cff1e2f46fb84406
https://doi.org/10.1016/j.jpowsour.2007.08.056

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Bifunctional activation of a direct methanol fuel cell

Autor: Klaus Wippermann, Jürgen Mergel, Birger Fricke, Andrei Kulikovsky, Dirk Uwe Sauer, Heinz Schmitz, T. Sanders

Publikováno v: Journal of Power Sources. 173:420-423

We report a novel method for performance recovery of direct methanol fuel cells. Lowering of air flow rate below a critical value turns the cell into bifunctional regime, when the oxygen-rich part of the cell generates current while the rest part wor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4af3782b6a7b2fa730d2d3f904c3db03
https://doi.org/10.1016/j.jpowsour.2007.04.072

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Charging performance of automotive batteries—An underestimated factor influencing lifetime and reliable battery operation

Autor: Oliver Bohlen, Marc Thele, Julia Schiffer, Birger Fricke, Eckhard Karden, Holger Blanke, Rudi Kaiser, Jochen Bernhard Gerschler, Dirk Uwe Sauer

Publikováno v: Journal of Power Sources. 168:22-30

Dynamic charge acceptance and charge acceptance under constant voltage charging conditions are for two reasons essential for lead-acid battery operation: energy efficiency in applications with limited charging time (e.g. PV systems or regenerative br

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c1c2fe3094f17e6053bc013311915a2
https://doi.org/10.1016/j.jpowsour.2006.11.064

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Energy storage devices for future hybrid electric vehicles

Autor: Birger Fricke, Serv ´ e Ploumen, Eckhard Karden, Kent Snyder, Ted Miller

Publikováno v: Journal of Power Sources. 168:2-11

Powertrain hybridization as well as electrical energy management are imposing new requirements on electrical storage systems in vehicles. This paper characterizes the associated vehicle attributes and, in particular, the various levels of hybrids. Ne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::88039198420ab7acf723716cda861d61
https://doi.org/10.1016/j.jpowsour.2006.10.090

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DMFC: Galvanic or electrolytic cell?

Autor: Birger Fricke, T. Sanders, Dirk Uwe Sauer, Jürgen Mergel, Andrei Kulikovsky, Heinz Schmitz, Klaus Wippermann

Publikováno v: Electrochemistry Communications, Vol 8, Iss 5, Pp 754-760 (2006)

We report measurements of local current distribution in a direct methanol fuel cell with single straight channels and segmented electrodes. The experiments directly confirm the existence of a bifunctional regime of DMFC operation: at low air flow rat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6eaf637de1531ac9acf5f8b8c9dc4797
https://doi.org/10.1016/j.elecom.2006.03.011

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Impedance measurements on lead–acid batteries for state-of-charge, state-of-health and cranking capability prognosis in electric and hybrid electric vehicles

Autor: Dirk Uwe Sauer, S. Buller, Oliver Bohlen, Abderrezak Hammouche, Birger Fricke, Holger Blanke, Dirk Linzen, Marc Thele, Rik W. De Doncker

Publikováno v: Journal of Power Sources. 144:418-425

Various attempts have been made to use impedance measurements for online analysis and offline modelling of lead–acid batteries. This presentation gives an overview on the latest and successful approaches based on impedance measurements to assess st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::832b533c33f639f5f626bb3dea01d881
https://doi.org/10.1016/j.jpowsour.2004.10.028

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Bifunctional Regime of DMFC Operation Close to Open Circuit Conditions

Autor: Klaus Wippermann, Birger Fricke, Tilman Sanders, Dirk Uwe Sauer, Juergen Mergel, Heinz Schmitz, Andrei Kulikovsky

Publikováno v: ECS Meeting Abstracts. :1144-1144

not Available.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63843d5c53abef19a30b7b9d1deb49f9
https://doi.org/10.1149/ma2006-01/33/1144

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