The network owners liked the possibility that some of their most expensive cells could be rejuvenated.
So we looks at a population of 240 cells, and found we could improve 8 banks with 1 C3 DCH cycle. This was really cost effective for the Network owner, and the program was extended further. We think that these cells will now deliver another 2-3 years service life.
We applied it also to some 500 and 1000 Ah 2V AGM cells. But the very general observation is that there is no real improvement if the AGM cells are more than about 5-6 years old.
Monoblocks ?
Well it’s not cost effective for the network owner, and the small populations we tried were not successful. In fact on some 12V monoblocks, the cycle actually reduced their capacity even more. I suspect that many people will say of course (it’s a AGM monoblock, you can’t actually get capacity out of them!)
I don’t want to dwell on this. But we did go back and re-look at our data, to see the effect of occasional routine deep discharging.
