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Träfflista för sökning "WFRF:(Bessman Alexander) srt2:(2015)"

Sökning: WFRF:(Bessman Alexander) > (2015)

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1.
  • Bessman, Alexander, et al. (författare)
  • Investigating the aging effect of current ripple on lithium-ion cells
  • 2015
  • Ingår i: ECS Transactions. - : Electrochemical Society. - 1938-6737. - 9781607685395 ; , s. 101-106
  • Konferensbidrag (refereegranskat)abstract
    • We have built an experimental setup which exposes twelve cells to a well-defined ripple current. It consists of a system for cycling high capacity cells in parallel with a triangular current waveform superimposed on top of the direct current. The frequency of the waveform is variable up to 50 Hz, and the sum of the DC and AC components can have a magnitude of -40 A to 40 A. Current is measured over a 500 μω shunt resistor. The voltage and current of each cell is read simultaneously at a sample rate up to 4 MS/s, allowing for precise impedance measurements even for high frequency harmonics. The cells are cycled at 40 °C. The experiment has been designed to eliminate indirect effects of the AC harmonics as far as possible. This system is being used to test whether or not AC harmonics affect Li-ion aging.
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2.
  • Soares, Rudi, et al. (författare)
  • Design Aspects of an Experimental Setup for Investigating Current Ripple Effects in Lithium-ion Battery Cells
  • 2015
  • Ingår i: Power Electronics and Applications (EPE'15 ECCE-Europe), 2015 17th European Conference on. - : IEEE conference proceedings. ; , s. 1-8
  • Konferensbidrag (refereegranskat)abstract
    • This paper describes an experimental setup for investigating the effects of current ripple on lithium-ion battery cells. The experimental setup is designed so that twelve li-ion cells can be simultaneously tested in a controlled environment. The experimental setup allows for a wide range of current ripple in terms of frequency and amplitude. Additionally, the quantification of the current ripple effects such as the aging of li-ion cells implies that a precise measurement system has to be designed which also are discussed in the paper.
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