You're probably right about the temperature factor...I'd chalk that up to temperature still. Do you have a Supercharger around you?
No supercharger anywhere around me...closest is about 400 miles away...don't get me started on that...
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You're probably right about the temperature factor...I'd chalk that up to temperature still. Do you have a Supercharger around you?
Each cell is individually heated and cooled, well, not individually, but coolant is flowing to each individual cell. The car cannot just decide, that say, cell #6323 is running a bit warmer then the rest, and decide to heat just that individual cell. As for if each cell is individually monitored on a 1 by 1 basis for voltage or temps, only tesla can answer that, at least until I pop open my battery pack.I was under the impression that every cell in the battery pack was individually heated/cooled and monitored. If that's true, why would the BMS not be intelligent enough to know when certain cells are out of balance, etc.? The fact that Tesla has not stated that packs need to be balanced would indicate that they are already handling this behind the scenes, and without the customer's need to intervene. I would be shocked if Tesla allowed any individual cell to drain or fill into a range where it would damage the cell or become detrimental to the cell's long term capacity or viability.
^^ this
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One other question... what's a P120?
You're probably right about the temperature factor...
No supercharger anywhere around me...closest is about 400 miles away...don't get me started on that...
You misunderstood my comment: I drove the car down until there were only 9 rated miles left to be used, then I charged to 100 percent of the 40 pack . I lost a mile 129 to 128. 10% loss since I have had the car 8 months 6000 miles. WHY ISN'T TESLA COMING FORWARD WITH THE INFORMATION on the proper method to charge for max range.
He originally got in the 140's. Only Tesla can really answer that. Have you actually BROUGHT it into a service center yet? or just contacted tesla via phone? I'd make a appointment and have a technician check it out. A Tech can plug in his laptop and take a nice detailed look at the vehicle as well.What did you get originally on a charge and what do you get now?
You misunderstood my comment: I drove the car down until there were only 9 rated miles left to be used, then I charged to 100 percent of the 40 pack . I lost a mile 129 to 128. 10% loss since I have had the car 8 months 6000 miles. WHY ISN'T TESLA COMING FORWARD WITH THE INFORMATION on the proper method to charge for max range.
Not that you want to hear this, but one sure fire way to max range charge like I do is to pay Tesla to un-lock your 60 battery and run it as a 60. That would help your range concerns as well... just a thought.
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Can't speak for Fred, and I know you mean well, but if Tesla suggested that, I wouldn't have a very good reaction. Kind of like saying, "nice little car you got there, but unless you want to see it continue to degrade prematurely, give us another 11K." Not exactly, because we would get the additional range of a 60, but seeing as we didn't want or need that additional range when we made the decision to purchase that car, it is not really an acceptable solution.
I've seen my max range drop approximately 15% in 9000 miles - not what I had signed up for.
When they made the decision to give the 40'ers crippled 60's, it seemed like a good idea, since for those of us who still had the cars after 5 or 6 or 7 years and the natural battery degradation brought us down to where it is now for some of us, we could pay for the upgrade and be happy campers again. If they had told us we would be seeing that level of degradation after less than a year because we couldn't fully charge the battery, I know that I wouldn't have made the purchase.
Not trying to stir things up, just trying to be helpful.
For those who are having real issues with their cars and don't want take amateur advice from us on TMC, they really should go to Tesla for this. And if we are lucky, they will share what they have learned.
Update:
As you can see, Islandbayy's 60 is not unique. I am at 14,500 miles and still get a 203mile range charge at -2*F.
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For me, Balancing is regularally, as I range charge often. In my opinion, i'd say Monthly with Lithium.
Having a balanced pack is important for longevity as well. In a out of balance pack, the lower voltage cells are getting cycled deeper then the higher voltage cells, causing them to go to a lower state of charge.
Sooo, the expectation wasn't that people go read all the Roadster threads
I was advised that balancing had not been completed and the next time I should try to allow it to finish completely.
upid question, as I've only range charged a few times and don't remember any messages one way or another. Are you saying the car displayed a message like this...or you contacted Tesla and they said this?
Kendall, it was islandbayy that did the advising. By message I meant that I didn't get the app showing "Charge Complete".Stupid question, as I've only range charged a few times and don't remember any messages one way or another. Are you saying the car displayed a message like this...or you contacted Tesla and they said this?
Old geezer like me is finding this topic of battery maintenance a little difficult to understand. From reading this thread along with others, I took away with this and please correct me if I am wrong:
A) Do not leave your battery at 100% for extended periods (10 minutes or more?)
B) Do not drain your battery down to "0".
C) Maintain battery SOC at 50%
D) Charge frequently and maintain SOC between 50%-70%
E) Range charge to balance battery pack once in a while. Perhaps once a month? (for a 15k mile car)
F) Supercharging can throw the battery pack off balance due to its rate of charge, but it should not harm the battery
G) Charge vehicle at 30A if possible when charging at home
A) Correct. However you need to have it 100% to balance.
B) Correct, avoid 0 when possible. Run to 0 when you have to.
C) Only for storage. 70-90% is better for daily usage.
D) Correct. Smallest depth of charge is best.
E) Correct, or when you need to squeeze the most miles out of your pack. It may take 2 or 3 range charges to see much difference.
F) Actually a supercharger can balance the pack quite well if allowed to range charge to completion. But operating the car from 0 to 90% will cause the pack to go out of balance eventually, regardless of supercharging.
G) Not sure if this helps any.
C) Only for storage. 70-90% is better for daily usage.