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by Oleksiy
Tue Jun 11, 2019 11:10 pm
Forum: News and Main BMW i3 Forum Discussions
Topic: Some stats for the year of use
Replies: 5
Views: 299

Re: Some stats for the year of use

All data are captured from the dashboard and instrument panel. I take photos of SOC and ambient temperature when I depart and arrive home, otherwise only temperature when in between trips. Once a day, usually upon arrival, I also get Batt.Kapa, Batt.Ladung and battery temperature data from hidden me...
by Oleksiy
Tue Jun 11, 2019 12:24 am
Forum: General / Main i3 Owners Forum
Topic: Charge Percentage
Replies: 10
Views: 407

Re: Charge Percentage

I thought that I read somewhere about BMW software-limiting the top end of the battery pack for longevity reasons, where 100% full isn't really 100%? Am I confused and it was actually someone else doing it? When I leave home every morning with a full charge, regen seems to work fine at the stop sig...
by Oleksiy
Mon Jun 10, 2019 5:03 pm
Forum: News and Main BMW i3 Forum Discussions
Topic: Some stats for the year of use
Replies: 5
Views: 299

Re: Some stats for the year of use

Should work now, thanks
by Oleksiy
Mon Jun 10, 2019 2:14 pm
Forum: News and Main BMW i3 Forum Discussions
Topic: Some stats for the year of use
Replies: 5
Views: 299

Some stats for the year of use

Here's the screenshot of the pivot table with monthly averages from my daily stats file I've logged for more than a year of use. My i3 is 09/2015 60Ah BEV, 30.5K miles now, I bought it at 15.7K miles in the US and brought it to Ukraine in the end of May 2018. The A column contains months - May-Dec 2...
by Oleksiy
Sat May 04, 2019 10:40 pm
Forum: Technical BMW i3 Discussions
Topic: Cell balancing
Replies: 6
Views: 636

Re: Cell balancing

Thanks, I may perform the re-initialization, this is why I spend time to install ISTA+ in the first place. Have been researching the downsides for a while before I pull the trigger.
by Oleksiy
Fri May 03, 2019 3:43 am
Forum: Technical BMW i3 Discussions
Topic: Cell balancing
Replies: 6
Views: 636

Re: Cell balancing

Thank you, I stand corrected, it does seem to plummet abruptly closer to zero SOC. Unfortunately, I wasn't able to find any voltage vs. SOC curve, but based on the screenshots borrowed from here https://www.goingelectric.de/forum/viewtopic.php?f=71&t=21752&start=750, this healthier battery displays ...
by Oleksiy
Thu May 02, 2019 4:54 am
Forum: Technical BMW i3 Discussions
Topic: Cell balancing
Replies: 6
Views: 636

Cell balancing

I checked my logs during the extended weekend we had in Ukraine, and it appeared that my last 100% charge took place back in March. And also, I had only five full 100% charges during March as well, with average beginning of day SOC staying at 85% both for March and April. This looked like a perfect ...
by Oleksiy
Wed Apr 24, 2019 10:55 pm
Forum: Technical BMW i3 Discussions
Topic: Converting I3 from US CCS to EU CCS
Replies: 14
Views: 8189

Re: Converting I3 from US CCS to EU CCS

Correct, it should just work. On top of the plug replacement, my OUC was modified to accept 220V instead of 120V, I'm not aware of the technical details though, it's a standard procedure.
by Oleksiy
Wed Apr 03, 2019 11:50 am
Forum: Technical BMW i3 Discussions
Topic: Management of Battery Life
Replies: 16
Views: 1599

Re: Management of Battery Life

Not sure what the specs are on the earlier batteries, but Samsung claims that the 94 Ah i3 battery cells can be charged through 4,600 cycles before degrading to 80% 'end of life' capacity - which if charged every day, that would be about 12.5 years. https://insideevs.com/lets-look-at-the-specs-of-t...
by Oleksiy
Wed Apr 03, 2019 3:59 am
Forum: Technical BMW i3 Discussions
Topic: Management of Battery Life
Replies: 16
Views: 1599

Re: Management of Battery Life

8% lower limit reserve and 6% upper limit reserve, to be exact, in a healthy i3 60Ah battery. Later, once SOH goes down, it's reflected in the upper reserve - it goes down as well, the lower one seems to stay untouched on paper. See my pack's 85.5% SOC upper charge limit on a screenshot below - it r...

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