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by Oleksiy
Fri Jan 18, 2019 3:31 pm
Forum: General / Main i3 Owners Forum
Topic: Battery Diagnostics
Replies: 12
Views: 2787

Re: Battery Diagnostics

Is it possible they did it for a reason? Answer customer requests in a binary manner (OK or not OK)is so much more convenient :roll:
by Oleksiy
Fri Jan 18, 2019 1:58 am
Forum: General / Main i3 Owners Forum
Topic: Battery Diagnostics
Replies: 12
Views: 2787

Re: Battery Diagnostics

You could consider installing ISTA+ software and connecting it to your car via OBD2 cable. This one provides a battery snapshot where you could check the cell balancing condition, and the floor and cap threshold the BMS uses for battery charging (usually 8% of the capacity is reserved as unused at t...
by Oleksiy
Sat Dec 22, 2018 2:53 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

Hmm... I wonder how my car was able to pull 5.5 kW while preconditioning and at 100% SOC if the heaters were only 3 kW together. That's based on the graph provided by OpenEVSE charger. Anyway, you could always verify if it does attempt to pre-heat the battery by checking the before and after tempera...
by Oleksiy
Sat Dec 22, 2018 2:25 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

I believe it may depend on the available kW capacity of your charger.
by Oleksiy
Sat Dec 22, 2018 1:30 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

You mean the car always preconditions the battery whenever a departure time is set? I'll test this in spring once my car is charged outside and I could monitor the current draw via my OpenEVSE. I charge using my OUC in the garage now, and the power meter is too far away from my house to check the dr...
by Oleksiy
Thu Dec 20, 2018 6:06 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

I've tried to only partially charge the battery before (I use a timer on the socket to control when it starts) with my trickle charger set to 2.4kw and after 3 hours the battery will be nearly fully charged 80% to 100% and the battery will only have increased in temperature by a couple of degrees -...
by Oleksiy
Thu Dec 20, 2018 2:40 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

If a lower state of charge is recommended unless extra range required, how can you warm the battery without increasing the SOC? What I did before I chose to put the car in a garage for the winter, I set the off-peak time setting and the departure and preconditioning time for the period needed for t...
by Oleksiy
Mon Nov 19, 2018 12:01 am
Forum: General / Main i3 Owners Forum
Topic: What does (1)-(2) beside fan symbol mean on Remote Cockpit ?
Replies: 9
Views: 3418

Re: What does (1)-(2) beside fan symbol mean on Remote Cockpit ?

I'd assume it means that the system will climatize iself before departure using 1 and 2 fan speed setting.
by Oleksiy
Wed Nov 14, 2018 5:23 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

The low, medium, and high 25% charge level ranges tested were from 20% to 45%, from 42% to 67%, and from 62% to 87%, respectively. Note for a 60 Ah i3, an indicated 0% charge level is an actual 10%, and a 100% charge level is an actual 95% due to charge level buffers at the low and high charge leve...
by Oleksiy
Tue Nov 13, 2018 11:47 am
Forum: Technical BMW i3 Discussions
Topic: Battery degradation driven by aging, charge cycles and charge current
Replies: 27
Views: 6499

Re: Battery degradation driven by aging, charge cycles and charge current

My i3 will heat up the battery only up to 10-11C during the overnight charging and preconditioning. I add 2 more on my way to office where the car is parked for the whole day outside. When I check the battery’s temperature at home right upon arrival, it’s 6-7C. And that’s now, when the ambient tempe...

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