P5 20 Optimal Use of Second Life Battery for Peak by we9mj6AB


									Optimal Use of Second Life Battery for
Peak Load Management and Improving the
Life of the Battery
Anupama. Keeli, Ratnesh K. Sharma, Member, IEEE
NEC Laboratories America
Cupertino, 95014 USA

Abstract— Impact of petroleum based vehicles on the
environment, cost and availability of fuel has led to an increased
interest in electric vehicle as a means of transportation. Battery is
a major component in an electric vehicle. Economic viability of
these vehicles depends on the availability of cost-effective
batteries. Subsidies provided by the government will be
instrumental in the initial success of electric vehicles. However, in
the long run for the commercial success of electric vehicles the
economics have to be self-sustained. Batteries used for
transportation purpose cannot be used once the energy capacity
reaches 70% - 80%. The remaining capacity of the battery can
still be utilized for secondary purpose like powering a building
during peak load hours and reducing the carbon foot print.
Owner of an electric vehicle would be benefited if a market for
the used electric vehicle batteries is created. These batteries are
called second life batteries. Commercial building peak load
reduction is considered in this study. This work deals with using
second life battery for peak load management and to analyze the
cost effectiveness of the second life battery to be used for
powering a commercial building. Battery is the main component
in this study and increasing the life of the second life battery
using Battery Life Estimator (BLE) is discussed. An optimal
solution for incorporating peak load management, cost saving
from the use of second life battery and lifetime of the second life
battery is achieved using a rule-based control for the parameters.

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