David,You did see the post that my 2014 Volt has a 16.5 kWh pack and has 10.4
usable? They did this for a reason and it was not to overcharge or undercharge
the battery pack to provide maximum life. There is one person on the Facebook
Volt group that had over 400k miles and close to original 10.4 kWh usable. I
keep mine plugged in all the time because it keeps the batteries at optimum
temperature. The Volt was an awesome design that kept the battery pack
pampered. I can't say the same for my 3 Honda Gen1 insights that killed their
packs due to poor engineering design. Honda was never interested in EV's
anyhow! I can still drive my 2000 Insight on gas only without the hybrid
assist and it gets 55 mpg, but it drives much better with the assist and gets
65 mpg!. I've corrected this on one of the Honda hybrids by replacing a week
'stick', that is 6 NiMh per stick, there are two rows of 7 and one row of 6 for
a total of 20, so 20x6x1.2 nominal for 144V or 165V fully charged. If you load
test all 20 of the sticks you will find one or two that are weak and can
replace them from various sources and get the vehicle running good. This is
fine for hobbyists that understand electronics, but not acceptable for normal
drivers. I bought my 2014 Volt December 2016 with 51k miles. I've changed the
oil twice and the tires once and I'm at 104k miles with the same electric range
when I bought it. The only time I use gas is when I drive to my daughters 66
miles away to visit or more likely fix things at her house. I test drove the
Tesla Model 3 single and dual motor vehicles. They are very impressive and
much quicker than my Volt. The drivability was no better than my Volt and I
have plenty of power for all driving situations, so I was not sold on a very
expensive upgrade. If I was buying a new $40k vehicle I would probably go with
the Tesla, but used Volt's are a much cheaper alternative, especially if you
drive less than 25-40 miles electric you will not need to use gas.
On Wednesday, February 3, 2021, 08:28:52 PM EST, Ed Blackmond via EV
<[email protected]> wrote:
The only time these guess-o-meters are correct is when they read zero. I’ve
had three OEM electric cars. The implementation of the guess-o-meter in the
1998 Honda EVPlus was by far the best. It consisted of a bar graph with two
horizontal bars indicating the distance to empty in different conditions. The
horizontal scale of the graph was distance in miles. The green bar was the
distance if driven most efficiently. The yellow bar was the distance under the
current operating conditions. Driving fast up hill with the heater blasting on
a cold day would push the yellow bar towards the left much faster than the
green bar. Coming back down the hill, the yellow bar would catch up with the
green bar. When the car was stopped, the yellow bar changed to some unknown
average. A quick glance at this graph provided all the information required.
If the range needed was less then what the yellow bar indicated, but less than
what the green bar indicated, then all that was required was to operate a
little more efficiently and the destination would be within reach. If the
destination was farther than what the green bar indicated, a charging stop was
going to be required before reaching the destination.
The best thing that can be said about the guess-o-meter in the 2011 Nissan Leaf
is that it is inaccurate. It consists of a number indicating the distance
remaining in miles. It is based on some unknown algorithm that seems to have
no relation to reality. It also has a state of charge gauge with twelve
segments indicating the charge remaining. Unfortunately, each segment does not
represent the same amount of charge. Over time it is possible to get a feel
for the amount of charge each segment represents, but figuring this out and
applying the knowledge at each observation of the gauge was more work than
appropriate for an instrument that is intended for use in a moving automobile.
The guess-o-meter in the Chevy Bolt is a combination of the instrumentation of
the Honda EVPlus and the Nissan Leaf. It consists of three numbers: at the top
is a theoretical maximum distance analogous to the Honda’s green bar. In the
middle is a number indicating the distance based on some unknown algorithm
which seems to take into account operating history and current operating
conditions. At the bottom is a theoretical minimum distance. I do not
understand why this number is anything but zero. If the car is powered on
while sitting in a parking lot, the battery will eventually fully discharge
without driving a single mile. The Chevy bolt also has a state of charge gauge
that seems to be consistent and much more accurate than the corresponding gauge
in the Nissan Leaf.
The Chevy Bolt also has a very nice feature referred to as trend bars. These
give an indication of the current operating conditions. If the car is
currently being operating in a manner that would exceed the middle number, a
trend bar extends upward from the middle number towards the theoretical maximum
number. The length of the trend bar indicates how efficiently the car is being
operated. If the car is being operated in a manner that would result in a
shorter range than indicated by the middle number, a trend bar extends downward
toward the theoretical minimum number with the length of the bar indicating who
inefficiently the car is being operated. By operating the car in a manner such
that the trend bars never extend above or below the middle number, will result
in the range indicated by the middle bar being achieved. The trend bars make
the Chevy Bolts instrumentation as useful as the distance to empty meter of the
Honda EVPlus. It just isn’t as simple and requires more effort.
Instrumentation should not only be accurate, but simple. While the
guess-o-meters that just present a number are simple, they are not accurate,
making them useless.
Ed
> On Feb 3, 2021, at 3:10 PM, Matt Lacey via EV <[email protected]> wrote:
>
> Likely the milage of driving up and down the driveway is much worse than
> actually driving somewhere.
>
> The calculated range is based on how much energy used in the previous several
> miles.
>
> She just needs to go for a drive to correct the calculation
>
> Get BlueMail for Android
>
> On 4 Feb 2021, 03:55, at 03:55, Bill Dennis via EV <[email protected]> wrote:
>> She leaves the car plugged in all the time, even after it's fully
>> charged.
>> She uses 110V charging.
>>
>> Bill
>>
>> -----Original Message-----
>> From: EV [mailto:[email protected]] On Behalf Of Peri Hartman
>> via EV
>> Sent: Wednesday, February 3, 2021 12:32 PM
>> To: Electric Vehicle Discussion List
>> Cc: Peri Hartman
>> Subject: Re: [EVDL] Pandemic Cell Fade
>>
>> What does the Volt charger do at full charge and the cable stays
>> plugged
>> in ? Does it periodically recharge as parasitic uses discharge the
>> battery ? What is her charging pattern and what was it before the
>> pandemic ? It could be that, after one year, constant recharging to
>> 100%
>> damaged the cells. What Just pure speculation.
>>
>> Peri
>>
>> << Annoyed by leaf blowers ? https://quietcleanseattle.org/ >>
>>
>> ------ Original Message ------
>> From: "Glenn Brooks via EV" <[email protected]>
>> To: "Electric Vehicle Discussion List" <[email protected]>
>> Cc: "Glenn Brooks" <[email protected]>
>> Sent: 03-Feb-21 11:26:39 AM
>> Subject: Re: [EVDL] Pandemic Cell Fade
>>
>>> One of the Battery cells going bad, maybe.
>>>
>>> Sent from my iPad
>>>
>>>> On Feb 3, 2021, at 11:14 AM, Bill Dennis via EV <[email protected]>
>> wrote:
>>>>
>>>> Pre-pandemic, when my mother-in-law charged her 2017 Chevy Volt, it
>> would
>>>> have about 60 miles electric range. Throughout the pandemic, she's
>> done
>>>> nothing with the car except drive it to the top of the driveway and
>> back
>> to
>>>> check the mail. When we were finally able to get to Georgia to
>> visit
>> her
>>>> this week after fifteen months, I notice that a full charge shows
>> only
>> 40
>>>> miles range now. Anyone ever notice anything similar, or have any
>> guess
>>>> why?
>>>>
>>>> Thanks,
>>>>
>>>> Bill
>>>>
>>>> _______________________________________________
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