Imiev measured data

Post by **acmotor** » Thu, 19 Dec 2013, 01:45

Fully charged after 80/100km/h driving.

The Canion is still a new toy so you have to put up with these posts.

At least it means you know the battery pack lasts for a while.

Post by **Gabz** » Thu, 19 Dec 2013, 01:51

right I'm going to have to add a bt odb adapter to my Christmas list

did you guys have a list of ones you know to work somewhere ?

Post by **CometBoy** » Thu, 19 Dec 2013, 02:09

That is a very good result!

You guys are all realy trying hard to make me jealous.....

Our pack is getting closer charge by charge. Good to see after that distance acmotor - BETTER then new!

Bruce

Post by **acmotor** » Thu, 19 Dec 2013, 07:11

Gabz,
I followed Kurt's recommendation and bought a Scantools OBDLink MX Bluetooth Scan Tool. OBD

The speed seems to be the key to operation. ICE vehicles only have one battery compared to 88 + 1 in the iMiEV.

Well that is an excuse maybe.
I did try an ELM327 MINI OBD2 OBD-II off ebay for $6.99 but they don't work in the iMiEV as Kurt warned. Works OK on museum vehicles though.

Post by **acmotor** » Thu, 19 Dec 2013, 07:40

My canion app 111 only seems to plot temperatures on cells 1 to 64 edit:66 (voltages are cells 1-88). This is on samsung S4 screen in full screen mode or data down the left mode.
What do you guys get ?

Anyway cells 14,47,48,53 are 2.5 deg warmer than the average and 5 deg warmer than the coldest. Not much in it. Can't see the top 22 cells through canion.
e.g.

Post by **acmotor** » Thu, 19 Dec 2013, 07:46

Hang on, is there a temperature sensor for every cell ? or are some shared. It does say units rather than cells.

Post by **acmotor** » Thu, 19 Dec 2013, 08:03

Ok, should have looked it up first.

imievforum

edit:
'There are 6 temperature sensors in the 10 eight cell modules (60) and 3 temperature sensors in the 2 four cell modules (6) for a total of 66'

Post by **offgridQLD** » Thu, 19 Dec 2013, 12:57

Sorry, yes one temp probe for a cell block not individual cells. It had me scratching my head at first to. You worked it out befor I read your post.

Kurt

Post by **offgridQLD** » Thu, 19 Dec 2013, 13:59

Acmotor,
Have you managed to log any of your usual commutes to get some idea of what Canion reports your consuming.

I have a good idea now of what is normal for my Brisbane to sunshine cost commute so anything out of the ordinary shows up in the numbers.

I can even overlay the graphs to see where things went different.

Kurt

Post by **Johny** » Thu, 19 Dec 2013, 16:08

acmotor wrote: Fully charged after 80/100km/h driving.

That 4.105 is exactly what Kurt's pack showed after a full change. Bruce's (CometBoy) pack is slowly getting to the same point. Impressive repeatability.

Hmm - then again the software would be wanting 4.105 - who knows what the REAL cell voltage is.

Post by **offgridQLD** » Thu, 19 Dec 2013, 16:49

The android app is just reading what the OBD port is telling it. So it's just reflecting what the Imievs computer is recording.

Any scan tools that Mitsubishi have to record data would just show the same as they get the data from the same place.

How accurate the on board computer and sensors are who knows.Voltage seems to have a 5mv resolution. So I guess it should be accurate down to that. In 2013 it shouldn't be to difficult or expensive to achieve this. How current is measured is another thing. I'm sure there must be a few shunts perhaps a low and high amp shunt considering the load variations?

Kurt

Post by **acmotor** » Fri, 20 Dec 2013, 07:52

I haven't managed a full trip log yet. The problem with using a mobile phone for the andriod app is that if it rings it terminates the canion app.

I could try a group SMS to all and say leave me alone I'm driving my EV

or take the sim out, but then I'd miss the call from the lotteries commission.

If I select flight mode it turns the BT off.

I did try data from bga's i today with the canion112 and his pack voltage is all billiard table level too. He is a good EV driver and picked up 35% regen in a hilly 10km city run that returned to start place. We did comment 'how can you have an EV without regen ?' after studying the canion data log.

Johny is right of course, the software target of a digitised BMS voltage is likey to be spot on after all.

Need to check out a 2010 imiev now.

Post by **CometBoy** » Fri, 20 Dec 2013, 16:27

Question about battery temperatures on hot days?

Very hot here in Adelaide at the moment and here is the caniOn snapshot I took when the car came back home after an afternoon of driving with a max outside temperature of 43 degrees.

My question is why are they so cool (relatively speaking)? I thought they would be a lot higher, based on the temperatures I measured at the pack on the MightyBoyEV project on days like this. Sue did comment she thought more was taken out of the pack then normal yesterday for the same trip – should have had caniOn logging.... Might just be the extra AC she needed? Got back with about 50% SOC for about 50kms of use. Was an extreme day...

Does the AC get directed into the pack area?? Seems I read about something like this when FastDC charging is pumping in bulk electrons... How does it work??

Also FYI max Tyre temperatures hit 44 degrees. Still cool and only a bit over ambient? (Yes it is calibrated)- max pressure was 44 PSI.

Will try an incoming call on the BT handsfree and see if our caniOn drops the BT connection.

Bruce

Post by **Johny** » Fri, 20 Dec 2013, 16:32

There is a blower at the rear of the pack that sucks air from the pack and expels it under the rear of the car (on top of the pack). The intake for the pack is under the driver seat (USA) so it takes air from the cabin. I'm assuming that it will only take cabin air if the cabin is cooler than the pack.
Either way, the design is that if the occupents are comforable - so is the pack.
So having the aircon on on hot days is good for the pack allthough range will suffer.
Same applies to cold climates.

Post by **Johny** » Fri, 20 Dec 2013, 16:38

This video shows it:

Post by **CometBoy** » Fri, 20 Dec 2013, 16:48

Thanks Johnny!

Found it in the cabin as described....

All makes perfect sense now!

So simple....

Bruce

Edit: That’s the same guy that did the YouTube Flood Damage video showing the pack being taken a part and he washed it! Worth a look if you haven’t seen it...

Wonder if the AC gets turned on on a hot day Fast Charging? Something else to check.

Post by **Johny** » Fri, 20 Dec 2013, 17:01

Yes, I watched mezmorized as he washed the electronics in the pack down with water. Anyway - it looks like there is another inlet as well as the cabin but I can't remember (I watched it a while back). Very helpful stuff in understanding how it all works. Rather elegant in it's simplicity (the cooling/heating).
I think you are right about the AC when fast charging - again - I read it somewhere....

Post by **CometBoy** » Fri, 20 Dec 2013, 17:27

On the MY12's I think it ducts from the front AC ducting assembly with no under-seat intake....

Might look at the Workshop Manual sometime, maybe it shows it.

Bruce

Post by **Gabz** » Fri, 20 Dec 2013, 18:56

the AC turned on at the start of my last fast charge and turned off as it got closer to 80% (note Schindler dc fast doesn't go past 80%)

Post by **offgridQLD** » Fri, 20 Dec 2013, 19:03

Thermal mass is why the pack dost get hot on a short trip.

It's 250kg block and gives it some buffer to sudden high/low changes

I'm on the road 1/2 way to Adelaide from Brisbane towing the teardrop camper boy it's hot ! Not to sure I would want to be driving the imiev and stuck in places like Dubo for 6hrs every 100km .its been Ac on full 110kph don't stop from 5am this morning lol
Kurt

Post by **offgridQLD** » Sat, 21 Dec 2013, 03:02

I would hope that Ac air gets recurculated and not lost through the pack exhaust.

Kurt

Post by **g4qber** » Sat, 21 Dec 2013, 08:28

using ac-motors dongle
after hooning down to his batcave

I've totally flattened my pack this year when I ran out of power on way to northam. 106.5 km easterly headwind and green mount hill climb

also tend to fully charge pack every time I get home using off peak power rafter 9pm.

Post by **offgridQLD** » Sat, 21 Dec 2013, 12:02

It's good to see the two packs with a few km on them looking healthy from a ballancers stand point anyhow.

Kurt

Post by **g4qber** » Sat, 21 Dec 2013, 15:55

Hi Kurt

Please explain why it says 3.1kW on the clipsal 15A power meter but only says
-2.4kW in the app
is the pack only accepting a 2.4kW charge?

Post by **Gabz** » Sat, 21 Dec 2013, 17:50

your forgetting AC to DC converter losses of 80-90%