Fleet operator risks for using fleets for V2G regulation

Future fleets of vehicles may include electric vehicles (EVs) or hybrid electric vehicles (HEVs) because of potential fuel savings. Recent demonstration of diesel parallel hybrids in a delivery fleet led to fuel economy improvements, and hybrid bus demonstrations exhibited twice the fuel economy of the conventional bus. Fleet ownership may include management of a fleet of vehicles as small as 10 units and as large as hundreds or thousands. In addition to fuel savings, the newer extended range electric vehicles (EREVs) and pure EVs permit vehicle to grid (V2G) opportunities. These V2G opportunities may present additional revenue for fleets by providing ancillary services to local grid independent system operators (ISOs), provided that the burden of driving and V2G services do not accelerate the degradation of the battery systems in these vehicles. The subject of this study is to determine the financial risks associated with accelerated battery degradation in a V2G-enabled EREV fleet expected to perform ancillary service duty while charging in addition to the normal loads of drive cycle duty. We determine that battery cycle life during V2G duty is a critical parameter, which can determine whether or not the business model is viable.

[1]  J. Apt,et al.  Lithium-ion battery cell degradation resulting from realistic vehicle and vehicle-to-grid utilization , 2010 .

[2]  L. S. Kanevskii,et al.  Degradation of lithium-ion batteries and how to fight it: A review , 2005 .

[3]  Davion Hill,et al.  Cost Effective Energy Improvements for an Existing Commercial Building: A Case Study , 2009 .

[4]  Willett Kempton,et al.  Vehicle-to-grid power implementation: From stabilizing the grid to supporting large-scale renewable energy , 2005 .

[5]  Mark A. Delucchi,et al.  An analysis of the retail and lifecycle cost of battery-powered electric vehicles , 2001 .

[6]  Goran Andersson,et al.  On integration of plug-in hybrid electric vehicles into existing power system structures , 2010 .

[7]  Benjamin K. Sovacool,et al.  Beyond Batteries: An Examination of the Benefits and Barriers to Plug-In Hybrid Electric Vehicles (PHEVs) and a Vehicle-to-Grid (V2G) Transition , 2009 .

[8]  A E Pisarski,et al.  NATIONAL TRANSPORTATION STATISTICS , 2000 .

[9]  M. Wohlfahrt‐Mehrens,et al.  Ageing mechanisms in lithium-ion batteries , 2005 .

[10]  Dan Carney.  Lithium battery bonanza , 2009 .

[11]  Willett Kempton,et al.  Using fleets of electric-drive vehicles for grid support , 2007 .

[12]  Gan Ning,et al.  Capacity fade study of lithium-ion batteries cycled at high discharge rates , 2003 .

[13]  Tony Markel,et al.  Improving Petroleum Displacement Potential of PHEVs Using Enhanced Charging Scenarios , 2009 .

[14]  Filip Johnsson,et al.  Plug-in hybrid electric vehicles as regulating power providers: Case studies of Sweden and Germany , 2010 .

[16]  R. Barnitt,et al.  FedEx Express Gasoline Hybrid Electric Delivery Truck Evaluation: 12-Month Report , 2011 .

[17]  Willett Kempton,et al.  Vehicle-to-grid power fundamentals: Calculating capacity and net revenue , 2005 .

[18]  K. M. Zhang,et al.  Using vehicle-to-grid technology for frequency regulation and peak-load reduction , 2011 .