Blue20
Posts: 186
Joined: Tue Jun 17, 2014 2:12 pm
Location: SAE Combo (CCS) Deadzone

Question on battery capacity

Wed Dec 16, 2015 6:07 pm

Does the hidden menu 13.08 "Batt. Kapa. max" show the usable battery size or the full capacity?

I snoop around today, and found mind only got 16.7 kWh! From 18.8 kWh, that would be a 11% degradation after only 1.5 year use. Should I get ready for a warranty claim?

websterize
Posts: 474
Joined: Sun Sep 07, 2014 3:39 pm
Location: Maryland, USA

Re: Question on battery capacity

Thu Dec 17, 2015 11:34 am

That is the usable (relative) capacity. Absolute is ~22 kWh.

The figure in the display varies in my BEV, likely because of ambient temperature, driving technique, and who knows what else. And the usable "Kapa." increased after some of the software updates this year. I think it would be premature to file a warranty claim.
2015 Tera BEV | Coding spreadsheet

jadnashuanh
Posts: 3285
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Question on battery capacity

Thu Dec 17, 2015 12:14 pm

Warranty replacement is triggered at less than 70% of 'new' capacity. Plus, as has been said, the indication varies based on various conditions, and if you were to check it again tomorrow, it might show a different value. It might be possible to have one bad module, and that could be replaced, if necessary.

There's a reason why BMW doesn't advertise how to get into the service menus...interpreting them takes some training, and people can freak out for no reason if there's something there they don't understand in context.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

Blue20
Posts: 186
Joined: Tue Jun 17, 2014 2:12 pm
Location: SAE Combo (CCS) Deadzone

Re: Question on battery capacity

Thu Dec 17, 2015 4:03 pm

For sure not a claim for now. But I'm just surprise 11% drop after just 1.5 year. If this rate continues, it won't be long before crossing the 30% mark. Hopefully, it is as suggested affected by temperature. Will check again in a warmer day.

fdl1409
Posts: 154
Joined: Sun Feb 23, 2014 1:37 am
Location: Germany

Re: Question on battery capacity

Thu Dec 17, 2015 10:53 pm

Probably a software issue. Several owners in Germany reported that after a software update suddenly max capa was much lower.
My max capa ( may 2014 REx, 15.000 miles ) has never been below 19.0 kWh even in winter. Highest ever was 19.9, and I saw 19.8 when I looked 7th october.

Frank
BMW i3 REx

jadnashuanh
Posts: 3285
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Question on battery capacity

Thu Dec 17, 2015 11:14 pm

I may be a result of reflashing the memory and it may take a bit of time for the history and status to be rebuilt to give an accurate indication.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

Georgios
Posts: 5
Joined: Sun Jan 17, 2016 5:06 am

Re: Question on battery capacity

Tue Jan 19, 2016 2:36 pm

Mine's only 18.4 :(

Return to “Technical BMW i3 Discussions”