Are Plug-In Hybrids the Best Option until Electric Cars Become More Common?


Going the Extra Mile – Intelligent Energy Management of Plug-In Hybrid Electric Vehicles (6 page pdf, Kanok Boriboonsomsin, Guoyuan Wu, and Matthew Barth, ACCESS, University of California, May 2016)

Today we review some testing of energy management strategies to find the optimum use of the battery in a plug-in hybrid while minimizing the use of carbon fuel. This is in the context of the fact that electric cars are less than 1% of all cars in many parts of the USA and Canada and that in some regions of those countries (for example, California, Ontario, Quebec) electric power is produced from carbon free energy sources. Results indicate that if electric energy use is restricted to when the battery level is between 20 and 80% charged (such as in stop and go traffic or going downhill) then the fuel use is minimized.  Overall gasoline consumption can be reduced by between 9 and 14% over what a normal hybrid electric car would achieve which in turn is twice as efficient as car that uses only gasoline. This is true if the power used to charge the battery some from renewable energy (hydro or nuclear).

plug in hybrid diagram

To see Key Quotes and Links to key reports about this post, click HERE

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