I am the owner of an i-miev from the UK - it is a 2011 with 11k miles, and has been sat for a few years unused, ever since one cell went low and the BMS refused to charge (I have never driven it, I bought it in this state to try and save it from the scrap yard !).
I am going to take out the battery pack and test each cell, so that I know whether the pack is any good (i.e. how many cells need replacing). I am trying to work out what I can use to test the cells, that doesnt take forever ! I've searched online and on forums and can't see anyone testing these cells and how they did it.
So far I am thinking of using a powerful RC charger, one that does 10A+, either a dual or quad charger so I can charge 2 or 4 batteries at once. Then get 2 or 4 battery capacity testers, i've seen some on ebay (and used similar things in the past), something like ebay item 183506412814. It doesnt mattery if it is not 100% accurate, I just need to identify bad cells.
Depending on the number of bad cells will determine the next steps for this car ! I'm excited to work on this vehicle as i've always been interested in batteries and charging technology and have built my own hobby battery packs in the past, so have experience with charging/testing/building multi-cell packs.
I have a copy of the Mitsubishi removal procedure for the battery so should be OK there - it might take me a while tho !
Any thoughts you guys have on better ways to test these big cells is useful - from the specs of this car these cells have to take up to 150Amps charge and discharge which is pretty impressive, but I can't replicate anything like that without very expensive kit, so it will be a lot slower my way !