No typo John, the question Wax 1973 ask was about the '09 FEH which you do not have. Ford did make many changes to the '09 and I have the same issue that Wax1973 has. Not having hills to charge the battery with regen I rarely see over 51% SoC. I've gotten 52% after a long highway trip and braking on the exit ramp. Ford may have lowered the SoC range to allow more regen space for long downhill trips or better MPG on the highway.

GaryG

 

I asked for your source because I seek to learn more. Your response seems arrogant.

I looked up my Wikipedia source. It notes the SOC (State of Charge) as right on your numbers, which it should since they cited you as the source.

This is all observed, and therefore anecdotal info. Please advertise it as such in the future.

To advertise it as anything else is to claim an inappropriate credibility. For example what is the specified accuracy of your instrumentation and when was that accuracy last checked to a standard?

Now that I know the Wiki article is based solely on one persons observations I will give it less credibility.

For example your numbers, and those in the Wikipedia article, are curbside numbers, not numbers underway at power. The way the system is programmed to operate at power may be different.

I am interested first in how the system is programmed to operate, then how it performs in the real world and thus how it measures up.

 

This is a photo of the highest SOC I obtained during driving:

68.6% SOC which occurred in Maryland during a long over 2 mile downhill. I do not know how high the SOC would be on a longer downhill.

 

Interesting... I'm curious, was that obtained in "D" or "L"? Thanks!

 

d

 

As long as the FEH is moving forward under power and running on the ICE it should not make a difference in those numbers. But it would be interesting to know if it did. The manuals advertise "L" as only increasing the charging output to the traction battery when braking or coasting.

From the 68.6% SOC above I infer that the charge discharge cycle when underway (instead of curbside) is a broader range. My guesstimate from experience watching submarine batteries (different chemistry) over the years is that the underway curves of charge & discharge is about 30-40% to about 70-80%.

So the bottom end isn't too far off but we'll have to refine the top end a bit.

This is just based on my behind the wheel observation of the system.

 

the first week I had my FEH, my mother needed to move. Bad part was she moved up to big bear mt. On the way down from Big Bear (no SG) my green batt bars got all full. Well all but the top bar. I remember asking my wife to dbl look that I was seeing it right.

I'm sorry to say I dont know the % with out a SG.

 

66% is the max for my 2008 FEH, on a long downhill. The engine began to spin at this point (to about 4K RPM), although the SG indicated 9999 MPG, i.e., no fuel being used.

 

Sounds like you might have been in "L" for engine braking. That is how mine behaves when there is no more "room" in the battery and the braking has to be doe somewhere else, like compression braking by the engine.

It very rarely does this when in "D," even on long grades.

True?

 

I think I was in and out of L, based on my speed, it was in the mountains.