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Re: Questions and Data tracking

Posted: Fri Nov 15, 2019 10:36 am
by Kermit
Data from this month's 100% charge (November.) 11/15/19
Previous Charge to 100% was 108 miles. This charge to 100% and the GOM is at 88 miles* (*This was after a full 20 minute pre-conditioning cycle.)
Previous Charge to 100% kWh was 16.7333336. It dropped twice between charges (10/31/19 - 16.50kWh and 11/2/19 16.43kWh) and again at today at the full charge. This charge to 100% and the kWh went down to 16.3666668 kWh (odometer is at 16,293). The battery was conditioned and was at 55.4F for this reading. The average was 5.5 mi/kWh this past month over 521.6 miles.
Temperatures were mild in October and dropped below freezing for the past week or two in November.

Fuel is $2.39/ gallon here now and electricity is $0.074 per kWh so I am getting about 133.2 miles out of what it costs for a gallon of gas right now (after assuming 75% efficiency of the electricity actually into the battery.)

185.35 MPGe (1 Gallon of Gas = 33.7kWh)

Re: Questions and Data tracking

Posted: Tue Dec 03, 2019 7:02 pm
by RSC
December readings:

Date.......... Miles. Capacity (kWh)
05/5/2019 18601 16.1
06/1/2019 18905 15.9
07/3/2019 19259 15.9
08/1/2019 19669 16.3
09/1/2019 19878 16.4
10/2/2019 20190 16.0
11/1/2019 20611 16.0
12/3/2019 20974 15.7

Getting colder in the garage.

Re: Questions and Data tracking

Posted: Wed Jan 01, 2020 1:37 pm
by RSC
January readings:

Date.......... Miles. Capacity (kWh)
05/5/2019 18601 16.1
06/1/2019 18905 15.9
07/3/2019 19259 15.9
08/1/2019 19669 16.3
09/1/2019 19878 16.4
10/2/2019 20190 16.0
11/1/2019 20611 16.0
12/3/2019 20974 15.7
01/1/2020 21176 15.7

Re: Questions and Data tracking

Posted: Wed Jan 01, 2020 4:21 pm
by NORTON
Happy New Year!

This is not very current as I'm past 75 k miles.
Readings are from the Energy Screen. I don't have Torque Pro working with the Bolt PIDs yet.
Is there a big difference in data between the two methods?

Mileage- date - % Used - kWh used - Present Capacity kWh
70001 8-29-19 81% 15 18.52
70488 9-14-19 59% 11 18.64
70597 9-16-19 59% 11 18.64
70696 9-18-19 56% 10.3 18.39
72131 10-21-19 80% 14.7 18.38
72467 10-28-19 78% 15.1 19.36

Did A123, the maker of the '14 Spark EV cells under rate them?
I read something about this.....

From wiki here: https://en.wikipedia.org/wiki/Chevrolet_Spark#Spark_EV
(MY 2015+) 19 kWh lithium-ion battery by LG Chem.
MY 2014: 21.3 kWh Lithium iron phosphate by A123, claimed as nano-phosphate Li-ion battery.

Re: Questions and Data tracking

Posted: Wed Jan 01, 2020 5:29 pm
by RSC
NORTON wrote:
Wed Jan 01, 2020 4:21 pm
Is there a big difference in data between the two methods?
As nearly as I can tell, the two methods are pretty close. I can't be very accurate using the energy screen though, since I'm almost always at the top end of the battery. I can only think of three occasions that I've gone below 50% state of charge. Typically for me the energy screen will show something like 3.2 kWh and 20% used.

I know that you already know this, and it's been pointed out before, but for newcomers, you have to measure energy used since the last full charge. Partial charges will not give a valid result.

Re: Questions and Data tracking

Posted: Thu Jan 02, 2020 9:56 am
by MrDRMorgan
NORTON wrote:
Wed Jan 01, 2020 4:21 pm
Happy New Year!

This is not very current as I'm past 75 k miles.
Readings are from the Energy Screen. I don't have Torque Pro working with the Bolt PIDs yet.
Is there a big difference in data between the two methods?

Mileage- date - % Used - kWh used - Present Capacity kWh
70001 8-29-19 81% 15 18.52
70488 9-14-19 59% 11 18.64
70597 9-16-19 59% 11 18.64
70696 9-18-19 56% 10.3 18.39
72131 10-21-19 80% 14.7 18.38
72467 10-28-19 78% 15.1 19.36

Did A123, the maker of the '14 Spark EV cells under rate the them?
I read something about this.....

From wiki here: https://en.wikipedia.org/wiki/Chevrolet_Spark#Spark_EV
(MY 2015+) 19 kWh lithium-ion battery by LG Chem[48]
MY 2014: 21.3 kWh Lithium iron phosphate by A123, claimed as nano-phosphate Li-ion battery.
All I can say is WOW! Something is sure different! I know there are other Spark EV drivers on the road who also have high mileages of 75k and higher. It would be nice to know their current mileage and battery capacity too. I am really reaching, but I wonder if 2014 Spark EVs assembled early in the model year had the A123 battery and 2014 Spark EVs assembled later in the model year were switched to the LG battery.

The battery capacity for my 2014, leased 2015 and 2016 Spark EVs all were, are, or soon will be, around 15-15.5 kWh at 30k miles. In fact, my 2016 Spark EV battery capacity is currently 14.8 kWh at 27K miles as measured by TorquePro. A friend of mine, who also had a leased 2015 Spark EV, had 14.8 kWh at about 34k miles. when he returned his car to the dealer.

I haven't done the "calculated" battery capacity for a while so I will do it for both my 2014 and 2016 and compare it with the TorquePro values.

Re: Questions and Data tracking

Posted: Thu Jan 02, 2020 10:16 am
by scrambler
I am down to 13.6kWh usable on my 2014 Spark steady decline year over year, and I only do about 7000 miles a year with it.

Re: Questions and Data tracking

Posted: Thu Jan 02, 2020 3:02 pm
by MrDRMorgan
scrambler wrote:
Thu Jan 02, 2020 10:16 am
I am down to 13.6kWh usable on my 2014 Spark steady decline year over year, and I only do about 7000 miles a year with it.
How many miles are on your ODO? The linear trendline for my TorquePro battery capacity data shows I will hit 13.5 kWh in about 8000 miles (in about 2 years) when my 2014 ODO hits 30K miles.

Re: Questions and Data tracking

Posted: Wed Jan 15, 2020 1:32 pm
by Kermit
Data from this month's 100% charge (December.) 12/09/19
Previous Charge to 100% was 88* miles. This charge to 100% and the GOM is at 97 miles
Previous Charge to 100% kWh was 16.3666668. This charge to 100% and the kWh went down to 16.2000008 kWh (odometer is at 16,485). The battery was at 57.2F for this reading. The average was 5.9 mi/kWh this past month over 191.8 miles.
Temperatures were mild in November and beginning of December and dropped below freezing only a few days.

Fuel is $2.39/ gallon here now and electricity is $0.074 per kWh so I am getting about 142.9 miles out of what it costs for a gallon of gas right now (after assuming 75% efficiency of the electricity actually into the battery.)

198.83 MPGe (1 Gallon of Gas = 33.7kWh)

Re: Questions and Data tracking

Posted: Wed Jan 15, 2020 1:41 pm
by NORTON
Kermit wrote:
Wed Jan 15, 2020 1:32 pm
.... The battery was conditioned and was at 57.2F for this reading. ....
What does this mean?
I understand you can see battery temp in the Torque app.