i-miev degradation in the tropics

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cr12330
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Real Name: Joseph Chin
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i-miev degradation in the tropics

Post by cr12330 » Sun, 18 Aug 2019, 21:09

I know someone who brought a 2011 model, as a show car from QLD back in 2014, it had like 100km range, since then its been in Darwin, in 2016 the range was 93km and now Today the range is down to 58. Looking at other topics on the i-miev, its one of the worse ones I've seen, saw in other post someone went down to 64km range, can heat and humidity effort the battery much more if this was kept in a cooler climate. Its done 68,000km so far, thoughts?

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jonescg
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Re: i-miev degradation in the tropics

Post by jonescg » Mon, 19 Aug 2019, 08:40

Yes, heat will definitely reduce the useful range of a battery - Arrhenius equation applies. For every 10 degrees Celsius the reaction rates will double, and that includes the bad chemical reactions which reduce the capacity of the battery. An EV without an active thermal management system in the tropics is a short lived EV.
AEVA National Secretary, WA branch chair.

antiscab
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Re: i-miev degradation in the tropics

Post by antiscab » Mon, 19 Aug 2019, 08:45

I wonder if its possible to have the car use the aircon to cool the pack down.
It already does this whilst fast charging.

maybe a thermostat, with relays applying power to the right places...
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

cr12330
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Re: i-miev degradation in the tropics

Post by cr12330 » Mon, 19 Aug 2019, 12:57

The person might be looking to sell this, looking at prices, they would consider $9000 dollars, do you think that fair price? thank you

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bladecar
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Re: i-miev degradation in the tropics

Post by bladecar » Wed, 21 Aug 2019, 12:20

Hi,

South East Queensland
This is where my 2012 (later 2011?) imiev is at according to two apps.
Cani0n150 reports:
Odo: 41624 km
SOC: 99.5
Bat Status: High 4.09 Low 4.085
Range 113Km (after charge overnight). I drive downhill generally when leaving home and it was up to 116km later using C and not B but this is irrelevant :)
I'm guessing that the calculated range after charging is also dependent on how you drove before you charged it. So MAYBE if you drove at 100 kph with the A/C on, up and down hills which consumes considerable power and on a hot day and then charge overnight, maybe the calculated range is much lower after charging because it is based on this heavy use. Not really sure.
Also, because I am what I am, I do not charge anything if I've just used it (because I don't have to) until the batteries have come to ambient temperature.
Wh/km history Av: 223 Wh/Km

EvBatMon Imiev reports:
Batt State of charge: 97.5%
34.4 Ah
Batt Cond. 73.54 %

I use this car as a short distance runabout. These cars pale into insignificance compared to the reasonably expensive current cars re range and power. They're sort of like scooters compared with motorbikes and have their specialised use.
I didn't know they had any cooling and while checking the coolant level and looking under the rear cover, they look like neat little things in the motor/electronics area, a bit like remote control cars with the light suspension etc.
You can't drive with any speed over those crap metal speed limiters which have abrupt curves or the rear wheels will bunny hop under power. So you know that and go slowly.
FYI.

cr12330
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Re: i-miev degradation in the tropics

Post by cr12330 » Thu, 22 Aug 2019, 12:49

Thank you, I appreciate the input, thats what I was thinking is to treat this car as a runabout or for short trips these days.

mikedufty
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Re: i-miev degradation in the tropics

Post by mikedufty » Thu, 22 Aug 2019, 22:49

I'd be concerned about the 58km range being an indication something is about to break completely.
It's possible it will just continue to slowly drop in range, but some people have had to replace the battery when it triggers errors and refuses to charge.
You'd probably want to at least get canion diagnostics for the battery, and probably budget for one of Chris's battery packs or at least replacing some cells - which makes $9000 seem a bit high. Might be better off getting one interstate. I sold mine (90km range) for $13,000 but I think prices may drop now that Japan import leafs are available as an alternative cheap EV.

antiscab
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Re: i-miev degradation in the tropics

Post by antiscab » Fri, 23 Aug 2019, 06:00

There are second hand imiev batteries available.
Josephs old pack is sitting at EV Shop for instance.

in case of a complete failure, I would be swapping to a second hand 80 or 90km range pack on the cheap, if that's all the range you need
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

cr12330
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Re: i-miev degradation in the tropics

Post by cr12330 » Sun, 25 Aug 2019, 15:17

Appreciate the feedback this helps quiet a bit, you wouldn't have details or a website for that person who got 2nd hand i-miev batteries? thank you

antiscab
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Re: i-miev degradation in the tropics

Post by antiscab » Sun, 25 Aug 2019, 17:13

There's a wreck here in WA. I've been toying with the idea of getting it, selling the battery off, and using it in the short term to validate a new battery pack (likely with Chris), and in the long term to be spare parts for my dads imiev.
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells

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