- no heat. I needed the range, so heat and all accessories were off.
- 2011 model
- I did 4 trips of 2 miles and several shorter trips, over 2 days. This
was on residential streets, steep hills, speeds aroun 20-25 mph. When I
saw the charge state drop from 12 bars down to 2, it was clear I needed
to charge. After that, I plugged in the 120 V charge cable and kept it
on charge all the time while not driving. Temp was around 20F.
The battery has only about 60% (or maybe 50%) of its original capacity;
it's pretty worn out at this point But the issue is the difference
between warm weather range and cold. Last week, I started with a full
charge and drove 30 miles RT with still 3 or 4 bars left when I
returned. Temp was 55F. Heat was off. This is partly on freeway, partly
on 40 mph highway, and some slower streets.
Peri
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------ Original Message ------
From: "Cor van de Water" <cor.vandewa...@gmail.com>
To: "Peri Hartman" <pe...@kotatko.com>
Cc: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Sent: 07-Apr-22 00:35:02
Subject: Re: Re[2]: [EVDL] kWh versus charging temperature
Peri,
Did you use the heater in the car when you were doing that 20 mile drive?
How long did that trip take in minutes and which model year Leaf did you drive?
I want to give some estimated nrs, so I can show how the distance can
be so different.
Cor.
On Wed, Apr 6, 2022 at 8:52 PM Peri Hartman <pe...@kotatko.com> wrote:
Cor, this just doesn't add up, for my case. Not the heaters, but the
difference in range between cold charging and warm charging.
Let's say I have about 2/3 the original battery capacity, which would be
16kWh. In warm weather, I'll guess I have a range of 50 miles, perhaps
60 if I go 40 mph without many stoplights. But, as I mentioned, in our
december cold snap, I was getting about 20. I came very close to running
out of energy, so I think 20 is pretty accurate. That's less than half
the range.
So, if the main culprit is internal resistance, then half the energy
would be going into warming up the battery. That's a hell of a lot of
energy. I would assume that one of two things would happen: the battery
would warm up and the resistance would drop (and range improve), or it
would become plasma.
In reality, I don't think either happens. That's why I made this post in
the first place. I have searched on the Internet but haven't found
anything beyond people's speculation. But I would think this is heavily
researched within the battery industry.
Peri
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