Battery life

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g4qber
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Battery life

Post by g4qber » Mon, 23 Jun 2014, 19:30

Just had a query from prospective owner in Queensland about batt life in warm to hot areas
Via Glenn pitcher paceway

I suggested 10 years at first then said 8 years
Also mentioned 5 year aus warranty
And batt is cooled with ac when on fast charge
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Battery life

Post by Malm » Mon, 23 Jun 2014, 23:35

I would say the same. It can be worst (only 6 or 7 years) or better. We just don't know. But it depends on the distance that we need to do everyday (or if we can charge at work).
Last edited by Malm on Mon, 23 Jun 2014, 13:37, edited 1 time in total.
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Battery life

Post by zzcoopej » Tue, 09 Dec 2014, 22:50

I think I've read somewhere (can't find it again however) that its best to run the battery down low before recharging it. Is that correct, and where is the definitive list of do's and don'ts?
The problem I have with running the battery down low, is that you need to plan ahead whether you're going to do more than X km the next day (I charge overnight on offpeak tariff). Normal day use is about 30km so 2-3 days before charging, but by the 3rd day there is not much flexibility for a change in plans.
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Battery life

Post by reecho » Wed, 10 Dec 2014, 00:04

Rule of thumb...

1) Don't leave fully charged for any length of time.
2) Don't leave completely discharged for any length of time.
3) Avoid overheating the batteries when parked.
4) Charge whenever you like and enjoy...!!

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Battery life

Post by LauraiMiEV » Sat, 20 Dec 2014, 13:20

zzcoopej wrote: I think I've read somewhere (can't find it again however) that its best to run the battery down low before recharging it. Is that correct, and where is the definitive list of do's and don'ts?


I can't find the "definitive list" but this article (and I'm sure many others) http://www.carshowroom.com.au/newcars/n ... Mitsubishi mentions that the memory function we all used to be terrified of with our mobile phones isn't a problem with the iMiEV batteries so you can top up even if it's low.

I have read (can't find the reference) that there is a problem with parking an iMiEV for long periods (one assumes weeks, not days) with a full charge or sitting on a trickle charge. This can/does limit battery function. This is what worries me since I just bought a "new" 2012 iMiEV which was sitting somewhere for 2 years and I can't imagine anyone drained and topped up the battery every few weeks. But so far so good. I can go 130 km easily and get home with 2 bars left.

Last edited by rhills on Sat, 20 Dec 2014, 06:25, edited 1 time in total.

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Post by LauraiMiEV » Sat, 20 Dec 2014, 13:22

As an aside, this Wikipedia page warns about charging outside of 0-45 degrees C. Can cause battery damage so depending on time of year and where you live you may want to watch out for this.

http://en.wikipedia.org/wiki/Lithium-io ... mperatures
Last edited by rhills on Sat, 20 Dec 2014, 06:26, edited 1 time in total.

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Battery life

Post by offgridQLD » Mon, 22 Dec 2014, 13:50

If you can do 130km with 2 bars remaining. Two bars is 22% SOC. Then your back is very healthyImage

The word (trickle charging)or a constant low output charge if the charger remains on doesn't apply to our Imiev's and there lithium battery charger. If you place the car on charge and walk away. The charger charges the batterys to 100% SOC several hrs then it switches off completely.

When storing the car as long as they battery is some where around 1/2 charged then everything is fine. My personal rule is having the battery at 100% SOC for more than a few hrs is not a good thing and having the battery at 100% SOC and in a hot environment for any length of time is a very bad thing.

I keep my imiev stored in the garage under the house cool - dark area about at about 40% soc if I'm not using it. That said we just use the car and if a hot car park is a unavoidable situation then so be it but when avoidable why not treat it nice.

Worst case scenario is car with a battery at 100% SOC and car parked out in the summer sun for days - weeks.

Kurt





Last edited by offgridQLD on Mon, 22 Dec 2014, 02:51, edited 1 time in total.

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Battery life

Post by g4qber » Thu, 25 Dec 2014, 15:58

Image

Malm do you have cells with voltages this low?
3.465V
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Post by Greg partridge » Fri, 26 Dec 2014, 16:38

g4qber how do you get these graphics on your i MiEV? I would like to be able to check out my cells

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Battery life

Post by reecho » Fri, 26 Dec 2014, 18:05

The software used for the diagnostic screens is Canion

So you need an android device either a phone or tablet.

The other item you need is a bluetooth dongle


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Battery life

Post by Malm » Mon, 29 Dec 2014, 15:36

g4qber wrote: Image

Malm do you have cells with voltages this low?
3.465V
First of all, I think 100% SoC is not the same amount of energy in different I-MiEV. In some (the new ones) I believe 100% is 16 kWh in the battery. But in mine, now, 100% SoC is less energy, I believe between 13 and 14 kWh.



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Battery life

Post by Peter C in Canberra » Sat, 10 Jan 2015, 01:40

The dreaded 'memory effect' is only an issue for NiCd batteries and that is not what we have. Occasionally (every few months) running the battery to less than 2 bars is recommended but it seems to only be for resetting the battery monitoring electronics. Same thing for your laptop battery. They only say to run that to near flat occasionally to make the battery gauge more accurate. Just charge when it suits you. If you have time-of-use electricity metering, use a timer to charge on cheaper off-peak, unless you expect to need the battery full sooner.
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Battery life

Post by g4qber » Sat, 10 Jan 2015, 16:43

Image

Ian R's 2010 imiev without 5th Pin
at 16000 kms

doing the math
100/33.5 * 28 = 83 km range.
Last edited by g4qber on Sat, 10 Jan 2015, 05:45, edited 1 time in total.
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Battery life

Post by Comet » Fri, 13 Feb 2015, 15:20

Anyone in Brisbane area with this kit?
Had my I-miev one week and learning all the tech stuff.
Would love to know the condition of my batteries.
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offgridQLD
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Battery life

Post by offgridQLD » Fri, 13 Feb 2015, 23:16

Hi Comet,
        I am in Brisbane weekdays and have the Canion app and obd scanner. You welcome to PM me to work something out. Or Wednesday 18th Feb at 7:30pm is out next AEVA meting. worth coming along.

Kurt

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