Transportation Seminar Speaker Dr. Gil Tal Ph.D.

“Modeling and Understanding Factors Affecting the Demand for Electric Cars Fast Charging”


Fast chargers have the capability to charge an electric car battery from 0% to 80% within thirty minutes. This technology is expected to be a key factor in the transportation electrification revolution. The first mass production battery electric vehicle, the Nissan LEAF, was introduced in 2010 with fast charging capability. It was soon followed by the first fast chargers in Japan, the USA, and Europe. Along with researchers and planners worldwide, we at the UC Davis PH&EV Research Center began to create models that estimate the spatial and temporal demand for chargers using driving patterns of ICEV drivers. We then adapted our models based on interviews and surveys of electric car drivers. Shortly after, an expansion of charging infrastructure enabled the collection of empirical data from both the chargers and the users that suggested the models may be wrong again.

In this presentation, I will discuss charging infrastructure demand forecasting, different modeling approaches, data needs and data limitations.  I will explore the insights from empirical data that includes 1.6 million DC fast charging events, surveys of 26,000 EV owners, and GPS travel traces of 4,200 households. Our results suggest that in most cases the major use cases for fast charging are not corridor charging on the way from origin to destination, but local charging at the trip origin or destination. The usage distribution does not change as expected when factors such as pricing or battery size are considered and may reflect future usage patterns of the infrastructure. Finally, I will discuss the potential short term (2020-2025) impact of shared and autonomous vehicles on charging demand. 


Dr. Gil Tal is a Research Director at the Plug-in Hybrid and Electric Vehicle Research Center at the University of California, Davis.  His expertise includes understanding the electric vehicle market, travel behavior and usage patterns of plug-in vehicles, infrastructure modelling and the demand and travel impacts of new mobility services and technology. Dr. Tal’s new work is also looking at the impact of shared automated and electrified mobility on the vehicle market and the demand for transportation related energy. He is currently working on projects for the California Air Resources Board, the California Energy Commission, and the Department of Energy, as well as car companies and utility companies. As part of this research, Dr. Tal has produced methodological innovations in online travel surveys and EV charging location modeling that include GIS-based mapping.


To see the video from the transportation seminar click on the links below:

Part 1:


Part 2:


Part 3:

Date and time: 
Thursday, September 21, 2017 - 10:45 to 11:45
Location of Event: 
Mason BLDG 1133
Event Type: 

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