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by Oleksiy
Sun Jan 05, 2020 3:50 am
Forum: Technical BMW i3 Discussions
Topic: Battery Replacement Under Warranty
Replies: 54
Views: 22902

Re: Battery Replacement Under Warranty

Regardless of the ambient temperature and charging power the number of kWh the battery receives is equal to its current Batt.Kapa, taking into account 5-10% losses. That's according to my logs (daily for 20 months), but I don't think i3 battery packs are as unique as everything else these days, so I...
by Oleksiy
Fri Jan 03, 2020 12:08 pm
Forum: Technical BMW i3 Discussions
Topic: Battery Replacement Under Warranty
Replies: 54
Views: 22902

Re: Battery Replacement Under Warranty

I'm curious if an easy way to check battery capacity more accurately is to just fast charge to known values a couple times and see how much kwh are able to be used. Or is this that wildly inaccurate? Isn't that what BMW is doing more or less when they discharge and then recharge (from what i think ...
by Oleksiy
Fri Jan 03, 2020 11:51 am
Forum: Technical BMW i3 Discussions
Topic: Battery Replacement Under Warranty
Replies: 54
Views: 22902

Re: Battery Replacement Under Warranty

I just checked my I3 and it is showing 12.3 on kappa max. Does outside temperature affect this reading? In my case low temperature seems to accelerate the rate of Batt.Kapa decrease. But the latter never picks up in summer. Check my stats here, I have a chart with Batt.Kapa over months later in the...
by Oleksiy
Sun Nov 17, 2019 1:35 pm
Forum: General / Main i3 Owners Forum
Topic: Ran my BEV down to ZERO!
Replies: 7
Views: 1073

Re: Ran my BEV down to ZERO!

In my case I did this on purpose the next day after resetting the adaptation values of my 2015 BEV. That’s to check the true level of degradation and if the battery calibration was still accurate. Drove it down to zero SOC and 0.1 kWh in Batt.Ladung menu, covered 160 km (back in the end of August). ...
by Oleksiy
Wed Sep 18, 2019 6:04 am
Forum: Technical BMW i3 Discussions
Topic: DIY HV Battery upgrade
Replies: 23
Views: 5021

Re: DIY HV Battery upgrade

At least it's being done in Leafs on almost industrial scale by third party workshops in Ukraine, and with great success. There are plenty of reports on Youtube. Haven't seen anything re i3 though. Did Nissan not say , that the batteries are not up-gradable. The 24kwh cannot be replaced by the newe...
by Oleksiy
Thu Aug 29, 2019 5:55 am
Forum: News and Main BMW i3 Forum Discussions
Topic: Some stats for the year of use
Replies: 8
Views: 2070

Re: Some stats for the year of use

Other 60Ah that I know of in Kyiv are in the same ball park. Also, I bought it used, so the total mileage is 34K miles / 54.5K km now. Secondly, the i3's BMS is notorious of not knowing what's going on with the battery, degradation included. Most likely, it just guesses the level of degradation base...
by Oleksiy
Thu Aug 29, 2019 4:48 am
Forum: News and Main BMW i3 Forum Discussions
Topic: Some stats for the year of use
Replies: 8
Views: 2070

Re: Some stats for the year of use

I've done the battery re-initialization in my 2015 BEV recently, so the stats are going to be skewed for some time. Hence sharing my previous logged data for over one year of use and 29K km driven. - All data points are monthly averages of daily logs (days I drove the car). I logged data before the ...
by Oleksiy
Thu Aug 29, 2019 4:41 am
Forum: Technical BMW i3 Discussions
Topic: DIY HV Battery upgrade
Replies: 23
Views: 5021

Re: DIY HV Battery upgrade

At least it's being done in Leafs on almost industrial scale by third party workshops in Ukraine, and with great success. There are plenty of reports on Youtube. Haven't seen anything re i3 though.
by Oleksiy
Sat Jul 20, 2019 12:09 am
Forum: Technical BMW i3 Discussions
Topic: Charging after Reinitizalization of Battery Pack
Replies: 2
Views: 1280

Re: Charging after Reinitizalization of Battery Pack

You could easily check cell voltages at 100% and close to depletion using ISTA+, as well as reported cap and floor buffers. Check my post here for more details https://www.mybmwi3.com/forum/viewtopic.php?f=11&t=13535&p=56484#p56484. As far as the electricity getting into the pack is concerned, I hav...
by Oleksiy
Mon Jul 08, 2019 1:42 am
Forum: News and Main BMW i3 Forum Discussions
Topic: BMW Confirms No Direct i3 Successor
Replies: 7
Views: 1764

Re: BMW Confirms No Direct i3 Successor

I wonder why they should do it, they are still launching Mini Cooper EV shortly. I would certainly remove the existing i3 from the lineup - it's probably still generating losses for each car sold, and BMW is no Tesla with endless pool of capital around - they need to manage their financials prudentl...

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