In yet another trial, this one with 6V monoblocks in a 24V volt applications, again in controlled environment.
The resolve to keep annual discharge records for this group collapsed as part of a corporate de-skilling exercise, so we don’t have any character within the intervening years. After less than 5 years, this population was still above the 80% rule, and the spread of capacities in the group was becoming quite marked. These monoblocks were replaced as part of another process unrelated to their capacity performance, and a test discharge prior to their scrapping did not occur. But it is reasonable to speculate that they wouldn’t have seen old age left to their own devices!
We have any number of these results, and it all becomes a little uninteresting. I will provide a summary in a moment, but first let’s look at the character of those cells and monoblock populations that do fail.