Yeah, an interesting wrinkle on this is that my Force occasionally will put out NORMAL
power current levels when in ECON mode! I noticed the other day while driving in ECON
that it felt like it was putting out a lot of power and when I looked at the ammeter, sure
enough, it was showing ~125A under acceleration, which is NORMAL-level current. I popped
it to OFF then back to ECON and it was back to the ~60-70A range that I had expected.
Maybe I need to clean those contacts.
Took the car for its longest trip so far with the CALBs (15 miles out to a friend's house
and back) at 45-55MPH speeds and it did really well. It was dark and cold, so we used the
electric heater on the way over there, and the fuel heater on the way home. It really is
nice to have the fuel heater up and running again because the energy consumption was much
lower on the way home, plus the cabin was really nice and warm. I checked the kerosene
tank when I got home and I think the trip used about a cup of kerosene -- very
economical. While I'd like the car to be 100% pollution-free (we have solar panels which
offset its electricity usage), this little bit of fuel usage isn't too bad in the big picture.
Another interesting issue -- I've noticed that the Ah counter doesn't quite get back to
zero when charging the car. So I wonder if my charge profile needs some tweaking. With
the lead-acids, a charge would always put about 10% extra back into the batteries, so the
Ah counter would be sitting in the negative range when the charge was complete; with these
batteries it's usually sitting at about .5 or so when the charge is done. My charge
profile is set to terminate the charge when the charge current drops below 1A @ 3.4V per
battery -- What are you other CALB users setting the charger for? I'm not familiar enough
with how Li-ion batteries behave to know if they need to have some amount of overcharge to
keep from being undercharged. I assume that I can get this back to zero by setting the
termination current to something lower. It's pretty consistent though, so I'm not really
worried about it or anything. It'd just be nice to have that meter showing FULL, and want
to avoid undercharging.
Took the car for a bunch of errands this morning, 26 miles total with mixed 25/45/55 MPH
speeds -- used about 24Ah, or .92 Ah/mile. Sweet.
Can't say enough good things about the CALB batteries. One of these days I'll take the
car for a real long trip and see how it does, but for our everyday driving tasks, I can
say that our '99 Saturn won't be seeing a lot of use any more. Very cool.
On 11/15/2012 11:47 AM, geo_homsy2 wrote:
> Hi Tom-
> yes, those current max's correspond roughly with mine.
> Here is a subtlety, though: Those limits are NOT programmed into the controller! The
> Force does not use the "ECON" pin on the AMC325 controller. Instead, it seems as though
> it uses resistor networks to mess with the throttle input to the controller. The reason
> I say "it seems", is that half the electronics is in the ignition box (for which we have
> a full schematic on this list), but the other half is in the console, at the selector
> I'm going to have to rip my selector switch out because it's behaving funny, so I will
> post schematics to this board when that happens.
http://portev.org -- Electric Vehicles, Solar Power & More
http://klanky.com -- Animation Projects
[Non-text portions of this message have been removed]