Lead-acid batteries in micro-hybrid applications. Part II. Test proposal |
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Authors: | S Schaeck AO StoermerJ Albers D Weirather-KoestnerH Kabza |
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Affiliation: | a BMW Group, 80788 München, Germany b Johnson Controls Power Solutions EMEA, 30419 Hannover, Germany c ZSW Ulm, 89081 Ulm, Germany d Universität Ulm, Institut für Energiewandlung und -speicherung, 89081 Ulm, Germany |
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Abstract: | In the first part of this work 1] selected key parameters for applying lead-acid (LA) batteries in micro-hybrid power systems (MHPS) were investigated. Main results are integrated in an accelerated, comprehensive test proposal presented here. The test proposal aims at a realistic representation of the pSoC operation regime, which is described in Refs. 1] and 6]. The test is designed to be sensitive with respect to dynamic charge acceptance (DCA) at partially discharged state (critical for regenerative braking) and the internal resistance at high-rate discharge (critical for idling stop applications). First results are presented for up-to-date valve-regulated LA batteries with absorbent glass mat (AGM) separators. The batteries are close to the limits of the first proposal of pass/fail-criteria. Also flooded batteries were tested; the first out of ten units failed already. |
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Keywords: | Valve-regulated lead-acid battery (VRLA) Micro-hybrid electric vehicle Accelerated aging test Dynamic charge acceptance |
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