You can also look at the datasheets for whatever cell you are testing and there will usually be average and maximum IR levels indicated. I am lazy so I just reject everything over 80ACIR and accept that some of mine in the 60-79 range are probably more degraded than ideal depending on brand/chemistry/age... I got to that 80 number by scanning Wolf's charts and seeing that most cells are okay up to around 70 and almost all are bad over 80.just bought a RC3563 and i have tested a single cell and a 12 volt lithium battery and got readings but where is the info to tell me what is good and what is bad
Yes, but thesis are often based on theory and not much experience. I prefer having both theoretical and practical information and then start doing my tests. What I found is this. I have quite a few Samsung 22F cells. The datasheet says this about IR:In a thesis manuscript, I read that a cell having IR 3 times bigger than nominal (indicated on cell datasheet) has to be rejected.
Yes, I think everybody has a rough idea of an acceptable range for both IR and capacity, when mixing cells in a pack. My range will be about 400mAh for capacity and 30mOhm for IR.Something else it that use pack of cells with roughly the same IR is cautious when building packs.
Thanks a lotA user here called Wolf is our god in terms of data collection on cells, he has some cells in his IR cheat sheet on google drive: https://drive.google.com/drive/folders/1UOQUXa4Kwa99KoeuNDe7EV3iSECb8iIs