Luddite
Posts: 8
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Best charging practices for battery longevity

Fri Apr 21, 2017 12:23 pm

Thanks for the quick reply guys. :D

Don, wouldn't starting the car also charge up the 12v battery when storing long term?

12v battery concerns me more than the traction battery - seems strange that it's a battery you have to top up instead of a sealed unit like most ICE car batteries. Don't want to pay dealer to replace it - would rather do it myself but my car came without a user manual so I don't know the code for the radio. I'll maybe connect up the 12v battery to charge every so often but should this be a problem if driving the car almost every day?

The following Transport Evolved video claims that the reason the 12v batteries die is that electric car 12v batteries do not have high loads going through them as would be the case with an ICE car and the high starting current in an ICE car "breaks down deposits that have built up on the plates of the battery over time"
Would using the 12v battery with a higher powered inverter help to do this or would it not draw enough power?
(I am aaware that it probably needs to be replaced at some time soon (as it would with an ICE car) but I want to maintain both my batteries well! :D

https://www.youtube.com/watch?v=pu30bchGu50&t=199s


I would be interested to see my traction battery's actual capacity so may have to buy the obd adaptor and hook up canion (or EvBatMon)
The car only has 25,000 miles on it but is coming up for 7 years old.
I think it was used fairly frequently but it may have been fully charged every day with the "granny charger" - 240v - 10A ~2.2kw and charged when the battery already had a high SOC.

Apparently it has never been charged using CHAdeMO although not sure if this would make much difference with non-frequent CHAdeMO charging. It rarely gets above 20C (~70f) here anyway so do'nt know if I should start using the quick charger and go on some more challenging journeys - I don't like pushing the battery to its limits. In 500 miles of ownership, I've never let the battery go below 5 bars.


Luddite, welcome to the forum! Whereabouts in Scotland are you (I was born in Edinburgh)?

JoeS, Thanks. I'm currently residing in Dundee. We currently have free parking for all pure EV's in Dundee and free charging/quick charging but not free parking for hybrids - there were too many mitsu outlander PHEV's bay blocking.
Mainly charge up from home anyway but it's good to know the network is expanding - free charging in most of Scotland 8-)
..........................................................
2011 Peugeot Ion

jray3
Posts: 1352
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Best charging practices for battery longevity

Fri Apr 21, 2017 2:06 pm

Since no simple and easy 80% option emerged during the first few years of ownership and we need most of the range on a regular basis, the only coddling that my battery gets is a 4-bar storage State Of Charge when we leave town. The longest hibernation has been two weeks at low SOC, though my car sat on the dealer's lot for a full year, probably at a high SOC. Otherwise we use it like an appliance, charging to 100% at least once per day, often twice. As spring warms up around here I've seen several RR mornings above 80 miles, so battery health is still good as we approach 70 k Miles on MR BEAN.
I haven't used CanIon in a while, as my last cheap Android tablet bit the dust. Sure wish there was an Apple version.
2012 i-SE "MR BEAN" 70,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Luddite
Posts: 8
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Best charging practices for battery longevity

Sat Apr 22, 2017 1:43 pm

Thanks for the reply jray3.
Good to hear that Mr bean is keeping well!

To you ever charge using CHAdeMO?
Since my car is new to me I have been charging up to 100% when I've been making longer journeys (40 miles with 30 miles of freeways - 70mph traffic) Today I drove after charging up to 13 bars and had 4 left when I returned.

What wears out the battery more, going down to 1-2 bars or always charging to 100%?
..........................................................
2011 Peugeot Ion

jray3
Posts: 1352
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: Best charging practices for battery longevity

Sat Apr 22, 2017 2:14 pm

During the first couple years I did a CHAdeMO charge 2-3 times per week. My record for a single day is at least 10 sessions on a road trip. After gaining confidence (during dcfc network downtimes), I never use CHAdeMO any more on my regular 54 mile Saturday morning trip, plus MR BEAN can rest and recharge on Saturday afternoons as I now have hobby EVs to run errands in.
2012 i-SE "MR BEAN" 70,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

FrostyCanada
Posts: 101
Joined: Tue Dec 01, 2015 10:37 am
Location: The Laurentians, a skip away from Montreal, Quebec, Canada

Re: Best charging practices for battery longevity

Sun Apr 23, 2017 5:28 am

Hello Luddite, we have three different charging styles with our imiev when commuting to work.

Winter time = home or work, we immediately charge to 100% when a plug is available.

Spring / fall = we delay charge to 100% (and very close to our departure time + rarely or never charge at work).

Summer = we only charge to 12-14 bars (never charge at work or only charge if required).

Weekends = we leave the car at 50 % and only charge as require.

Brian
2016 i-MiEV
with navigation package, in pearl white.

Luddite
Posts: 8
Joined: Tue Apr 11, 2017 8:34 am
Location: Scotland, UK

Re: Best charging practices for battery longevity

Thu Apr 27, 2017 1:42 pm

Thanks for your replies jray and Brian.
I am still getting used to my car but loving it.
Why can't tesla make a more basic car? The model 3 is still too complicated with the massive screen!
A 40kwh imiev? That'd be great :D
..........................................................
2011 Peugeot Ion

Don
Site Moderator
Posts: 2464
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: Best charging practices for battery longevity

Thu Apr 27, 2017 3:36 pm

Luddite wrote:A 40kwh imiev? That'd be great :D
The Chevy Bolt has a 60 Kwh battery for those who want to go a bit farther

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1994 Miata 60K miles - Soon to be sold
1979 Honda CBX six into six

JoeS
Site Moderator
Posts: 3223
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: Best charging practices for battery longevity

Thu Apr 27, 2017 10:45 pm

For those interested, here's a link to a US Army battery study:

http://www.dtic.mil/get-tr-doc/pdf?AD=ADA527711
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

9h1bw
Posts: 26
Joined: Sun Mar 19, 2017 2:35 am

Re: Best charging practices for battery longevity

Mon May 01, 2017 1:00 am

Thanks gentlemen for all your input. I just noticed that someone actually answered. I must have forgot to tick the email reminder.

If I understood you all the battery should be charged to about 12 bars. That would reduce the range quite a lot. I charge the iMeiv about once a week and live in Malta which is very hilly and tasking on the battery.

So how do I go about making sure I do not overcharge It? Is it using the remote control?

JoeS
Site Moderator
Posts: 3223
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: Best charging practices for battery longevity

Mon May 01, 2017 7:36 am

9h1bw wrote:...I charge the iMeiv about once a week and live in Malta which is very hilly and tasking on the battery.
Malta is so small that the i-MiEV is a wonderful match for the island! Why do you only charge once a week? Are you unable to charge at home?
9h1bw wrote:So how do I go about making sure I do not overcharge It? Is it using the remote control?
If your i-MiEV is the North American version, then it should have a Remote which can be used to program its charging - you can quickly calculate how long you need to charge to have it stop at 12 bars. If you do not have a Remote, then a simple mechanical timer (e.g., 6-hour) can do the same thing - that's what I primarily use.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Return to “Batteries and Battery Management”