Recent content by AAKEE

Cyclic aging is very very small during normal operation. We can reduce the cyclic aging by using smaller cycles and do these at lower SOC. 10% DoD series. Lowest degradation is 35-55% SOC in this test. On a Tesla display this is around 32-53% displayed SOC due to the buffer. Even using the...

Except from short range, no, I work far away from home and aim to arrive with low SOC. I still have a little to be able to cirmumnavigate any accident etc, as I go live into readinnes when I arrive at work (not good to be late). So I aim to arrive with ~ 10-20% and I have the car parked not...

I often use that picture to show both how similar the three chemistries behave and show a good average for Calendar aging for NCA. That picture is very good for these two things, but it is not the conclusion in all aspects. The very high droop is not present in all NMC test, in many cases it is...

Most answers already given. For longevity you would like to have the battery below 60% as much of the time as possible. The cells do not need to be stretched. Ever, really. Low SOC and small cycles reduce the degradation. The technique to ”stretch” is to help the BMS to estimate the battery...

[Sense] is subjective in this case. If longevity and to reduce degradation is the goal, low SOC is preferable both for calendar- and cyclic aging. You can not reduce degradation by charging past 55-60%. As long as the energy from 55-60% or less is enough for daily driving (chemistry...

Nope, its not. This is how calendar aging is affected by SOC and temperature. For NCA cells (Panasonic) stay at 55% displayed SOC or lower. For NMC/NMC(A) (LG) stay at 60% displayed or lower. 50% is on the good side and causes about 50% of the calendar aging above 60%. The calendar aging...

The LG M50 cells are not high power cells. A lot of tests shows that they are not, neither for charging nor discharging. We can also see in tests that high charging power clearly causes a extra wear from quite low charging power so from that we can assume that Tesla need to limit the charging...

Well, yes. I guess he means keep it connected? Low SOC cutvthe calendar aging in half, which makes extra sense hot days. When deiving, these apply: (My MSP but from memory it was the same values for my 2021 M3P) Target for passive cooling of the batt is 40C. (Most certainly means using...

If it was for the past 6 years, it is not NMC. Before 2021 all batteries was NCA. (The Not worry part is correct :) )

Think average temperature. The SEI build up speed is set by SOC x Temp. So if you use the average cell temp you will get it right. This is LG M-50, from a report testing them. Probably not exactly the cell in Teslas but probably very close in these behaviours.

Tesla do not set up the cars properly from the factory. It is very probable that the car is out of spec even before mounting the spacer/shim. Correct Toe is very important to tyre wear so anyone need to check an S after delivery. Reducing the high negative camber is not a bad thing, but...

Up to 60% is okey with LG NMC(A). I would guess you would se about ~ 3-4% the first year. Or better. Equals 7-8% or so after 5 years. The above taken from tests with similar LG cells. I have collegues using the LG Pack with low SOC and they see very low degradation rates. Lower than I wrote...

Nope. Having sentry On, the car already is awake. If sentry was off and the car was sleeping, it will be awake for 20 minutes or less. It will draw ~ 75Wh, so 0.075kWh or around 0.1% on a 3/Y. I have logged a lot with scan my tesla/teslalogger. My M3P 2021 (HW3) used 220W during sentry...

There’s most certainly not any issue about a rapid degradation. But the BMS varies the estimate a bit up and down. And we can not safely compare a calculated range (displayed range/ SOC) as SOC is roundedwich means several km from the rounding error.

Does’nt cool here either. On the other hand perhaps it do not need any cooling Sub freezing :D Might be slight OT, but the iPhones was programmed to shut down when outside temperature limits. Apple problably did not think these cold get outside the lower limits so the the screen always stated...