As many will likely recall, INL has / had four C-Max Hybrid under tests. I recently looked at the the test reports / summaries and graphed the HVB kWh of energy storage vs miles driven as shown in the two attachments below. One attachment is a graph of the average capacity decline / capacity loss of the nominal 1.4 kWh HVB of the four C-Max Hybrid test vehicles. The second attachment is similar to the first except each data point is shown for the four test vehicles. The last graph is similar to the first graph except it if for the Fusion and C-Max Energi test vehicles.
The conclusion I draw from the graphs is that the capacity loss for the Hybrid is minimal especially when compared with the Energi at various mileages. The Energis show a capacity loss of about 20% at around 160,000 miles while the Hybrids show about 10% loss at 160,000 miles. A 20% capacity loss (say 1.5 kWh) significantly reduces EV range in the Energi as it directly affects the usable kWh for operation in EV mode.
I'm going to look at ForScan to see if there is a way to quantify capacity loss for our Hybrids. Does anyone believe they can "see" a loss of capacity in the Hybrid through some performance measure like miles on EV only, more ICE cycling and so forth.
When I was looking to buy a C-Max, I considered the Energi but I was somewhat worried about capacity loss in the Energi given what the Leaf owner's were seeing at that time as it would significantly affect overall FE and thus payback of the additional cost of the Energi over the Hybrid in 2012 when I purchased my C-Max.
C-Max Hybrid Battery Tests 1.JPG 57.83KB 1 downloads
C-Max Hybrid Battery Tests 2.JPG 62.71KB 1 downloads
INL Energi Testing 2.JPG 66.55KB 1 downloads
Edited by Plus 3 Golfer, 22 March 2018 - 09:16 PM.