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Lithium Battery Cell Degradation Resulting from Realistic Vehicle and V2G Utilization

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kristopher Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-23-09 03:38 PM
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Lithium Battery Cell Degradation Resulting from Realistic Vehicle and V2G Utilization
Carnegie Mellon Electricity Industry Center Publications

CEIC-09-02

"Lithium-Ion Battery Cell Degradation Resulting from Realistic Vehicle and Vehicle-to-Grid Utilization"
Scott Peterson, Jay Apt, and Jay Whitacre

Abstract:
The effects of combined driving and vehicle-to-grid (V2G) usage on the lifetime performance of relevant commercial Li-ion cells were studied. We derived a nominal realistic driving schedule based on aggregating driving survey data and the Urban Dynamometer Driving Schedule, and used a vehicle physics model to create a daily battery duty cycle. Different degrees of continuous discharge were imposed on the cells to mimic afternoon V2G use to displace grid electricity. The loss of battery capacity was quantified as a function of driving days as well as a function of integrated capacity and energy processed by the cells. The cells tested showed promising capacity fade performance: more than 95% of the original cell capacity remains after thousands of driving days worth of use. Statistical analyses indicate that rapid vehicle motive cycling degraded the cells more than slower, V2G galvanostatic cycling. These data are intended to inform an economic model.

http://wpweb2.tepper.cmu.edu/ceic/papers/ceic-09-02.asp
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skids Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-23-09 04:20 PM
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1. Thanks

Glad to see the academics actually performing tests rather than
leave battery life to speculation and FUD.

But why does everyone require damn free signons even for academic papers
these days. It's really friggin annoying.
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MannyGoldstein Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-23-09 04:28 PM
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2. Nice To Know The Auto Companies Did Their Homework
Or got really, really lucky.
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