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Dan, Are the first four frames of data here Mott cells only, on four consecutive days? If so, I would say there is either a problem with the...
Ok, at least that is now clear to me. It's really unfortunate there is no way to service or even verify operation of the balancing electronics....
Interesting....please continue. I asked about the integrity of your cell logs data...let me ask it from a different angle. How do you know the...
delete....doubled post below.
If A123 was actually dissolved it would be one thing, but it's not--A123 has simply reorganized and is continuing on under new ownership. Yes,...
OK, I kind of figured that, but wanted to be sure the data was of a single cycle (not just from a single day). I'm much more used to looking at...
I'm glad you realize the sensitive nature of your requests. :-) I am not able to post any A123 documents here, and I am equally reluctant to post...
Can't blame you for not wanting to cut cells open. It's not something that should be undertaken casually. On to the data.... It's not clear to...
We should expect that the balancers will be required to do their job sooner or later, and that as time goes by they will do it more and more...
You are learning that balancing is not always as simple as it looks. What will be the best scheme depends both on what cells you are using, and...
Your observations are true, whether Li plating is present or not, and your strategy for dealing with it is spot on. Good work. Everyone has...
Hi Dan, Good questions, and it occurred to me a couple days ago that I should clarify what I've been saying here. 3.60V should be considered max...
About all I can tell you about that is I've flattened them back out and nothing catastrophic happened. I haven't had time to assess the long-term...
For capacity/high self discharge testing, you want to be outside the knees, not between them. DCR/load testing should be performed between the...
Balance them at 3.60, rested OCV. Remember that we have balancers to cope with small differences in cell behavior--not every behavioral anomaly...
Did you balance these cells at 100% or 0% SOC prior to testing, or were they tested right out of the box?
While certainly less than ideal, the cell may well be fine. Unfortunately, I'm probably a couple/few months away from being able to give you a...
Thanks for the update, and I hope you get many more years from it. Please keep us up to date if anything of interest comes up. I looked back over...
Chogan, I think Toxco would take them, but I believe your pack has been fixed. Is it re-installed yet?
GE was believed to be a potential suitor for the grid business, not sure why that never materialized. The real problem here is that publicly...
