Dealer can tell you kWhs in iMiEV

Mitsubishi EV Interest Group
Post Reply
Peter C in Canberra
Senior Member
Posts: 440
Joined: Sun, 27 Jul 2008, 04:05
Real Name: Peter Campbell
Location: Canberra

Dealer can tell you kWhs in iMiEV

Post by Peter C in Canberra » Fri, 18 Aug 2017, 14:47

I asked my local Mitsubishi iMiEV service guy about any read out he might have on battery health. So, after a recent service, our MY2012, made in 2011, iMiEV's service report had an extra line saying it has 12.9kWh. I asked if that data was available from earlier services. I was interested to have some extra data points. Was it declining more rapidly more recently or did it drop quite a bit when new but has now plateaued or is it just linear? Unfortunately he said he had only recently learned how to get that extra data. Extrapolating and interpreting a bit from what he said, I think the software infers a battery capacity from tracking the rate of rise of voltage while charging at a constant rate. Certainly he said it was not necessary to fully discharge to get this number out.
I typically have a range remaining guesstimated at 100km (a bit more in summer, a bit less in winter) and that has not changed noticeably in the last 4 years since we got the car as an ex-demo two years old already with about 20,000km already.
Anyway, from now on, I will be asking the service guy to include the kWh rating of the battery on each report.
Daihatsu charade conversion 2009-18, demo iMiEV 2013-present, used Holden Volt 2018-present, on the ACT's 100%-renewable-by-2020 electricity.

Rusdy
Groupie
Posts: 172
Joined: Mon, 09 Jun 2014, 16:45
Real Name: Rusdy
Location: Australia
Contact:

Re: Dealer can tell you kWhs in iMiEV

Post by Rusdy » Fri, 18 Aug 2017, 15:50

I would love to see iMiev battery graph vs time. I've done mine on Leaf (taken from LeafSpy):
Image

PS: I can't find info on the all knowing Google what on earth exactly 'Hx' is. My guess is capacity available shown on the GOM (Guess O Meter), since my range on the GOM reflects having 55% of 24kWh.

User avatar
jonescg
Senior Member
Posts: 2290
Joined: Thu, 21 Jan 2010, 23:05
Real Name: Chris Jones
Location: Perth, WA.

Re: Dealer can tell you kWhs in iMiEV

Post by jonescg » Fri, 18 Aug 2017, 15:58

From what I read of Li-ion cells, the capacity of the battery appears to drop rapidly at first, then kind of slow down. It always drops, but the rate of drop is frighteningly quick at the start but kind of normal after a few years/1000 cycles.
AEVA National Secretary, WA branch vice-chair

User avatar
reecho
Senior Member
Posts: 601
Joined: Sun, 17 Apr 2011, 02:39
Real Name: Richard Baird
Location: Perth WA
Contact:

Re: Dealer can tell you kWhs in iMiEV

Post by reecho » Sat, 19 Aug 2017, 08:54

Yes the value is available in MUT-3 that MMAU use for diagnostics. When a battery recalibration is performed that value is reset as well and repopulated after driving.

g4qber
Senior Member
Posts: 1664
Joined: Sat, 31 Jul 2010, 06:27
Real Name: Joseph
Location: Perth
Contact:

Re: Dealer can tell you kWhs in iMiEV

Post by g4qber » Sun, 20 Aug 2017, 04:22

My 2011 imiev with 2010 cells originally had a 94% PMU according to EVbatmon in feb now it is 70.42%

89,588 km odometer after arriving in Mandurah. After cell change.
Currently. 111,107 km
So
21,519 Km in 6 months
:roll: 2011 i-MiEV - 147 kms August 2018

Peter C in Canberra
Senior Member
Posts: 440
Joined: Sun, 27 Jul 2008, 04:05
Real Name: Peter Campbell
Location: Canberra

Re: Dealer can tell you kWhs in iMiEV

Post by Peter C in Canberra » Sun, 14 Jan 2018, 07:59

I now have two data points! Last week we had the airbag recall done and I asked to be told the battery capacity result as well. Previously it was 12.9kWh. Now 12.7kWh. The little change is reassuring because I had the feeling the range remaining guess-o-meter has been telling me lower numbers lately in spite of warmer weather.
Daihatsu charade conversion 2009-18, demo iMiEV 2013-present, used Holden Volt 2018-present, on the ACT's 100%-renewable-by-2020 electricity.

nuggetgalore
Groupie
Posts: 96
Joined: Sun, 11 Dec 2016, 18:02
Real Name: Andreas Tobler
Location: Rowville 3178 V
Contact:

Re: Dealer can tell you kWhs in iMiEV

Post by nuggetgalore » Mon, 15 Jan 2018, 17:14

Peter C in Canberra wrote:
Sun, 14 Jan 2018, 07:59
Previously it was 12.9kWh. Now 12.7kWh. The little change is reassuring because I had the feeling the range remaining guess-o-meter has been telling me lower numbers lately in spite of warmer weather.
I lost a fair bit over winter but recovered all but maybe 10 km since it warmed up.Bummer.
12.5 kWh is a fair bit down from the notional 16. It is probably similar to my 2010, but I think yours should have the newer , better cells than mine.
Anyway, I have what I have and if it degrades to much I decide what to do.
tinker

User avatar
zzcoopej
Groupie
Posts: 205
Joined: Fri, 14 Nov 2014, 13:37
Real Name: Jeremy
Location: Gosford
Contact:

Re: Dealer can tell you kWhs in iMiEV

Post by zzcoopej » Tue, 16 Jan 2018, 05:17

Peter C in Canberra wrote:
Sun, 14 Jan 2018, 07:59
I had the feeling the range remaining guess-o-meter has been telling me lower numbers lately in spite of warmer weather.
Do you check your tyre pressure regularly? iMiEV tyres are notorious for slowly deflating.

Here is my iMiEV data obtained via OBD from my EvBatMon Android & iPhone App -
Date            Odometer	Capacity (nom. 330V)  
2015-11-27	36000km		36.8Ah	12.1kWh
2015-12-08	36500km		36.7Ah	12.1kWh
2015-12-24	37000km		36.6Ah	12.0kWh
2016-03-10	40319km		36.3Ah	12.0kWh
2016-06-04	43810km		36.0Ah	11.9kWh
2016-07-17	45524km		35.8Ah	11.8kWh
2017-01-26	53700km		35.1Ah	11.6kWh
2017-03-10	55441km		34.9Ah	11.5kWh
2017-06-10	60128km		34.6Ah	11.4kWh
2017-07-30	62219km		34.4Ah	11.4kWh
2017-10-15	65345km		34.1Ah	11.3kWh
2010 iMiEV
2015 PHEV Aspire
Battery App EvBatMon for PHEV & iMiEV iOS(iPhone,iPad)& Android
www.EvPositive.com

Post Reply