Quote:
Originally Posted by neiloliver
We need to see what comes back from the AGM and see if the BRCA (through Paul) have any plans to change things for next year, otherwise all we have is rumour and speculation. From my point of view, the cells are abused terribly and you can always make a cell or battery go through a rapid disassembly if abused 'in the right/wrong way'.. but the ease with which it now seems possible is alarming.
The problem with the newer breed of cells is that the Chinese manufacturers are trading safety for other performance traits such as capacity and voltage.
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Why is this abuse never directed at the matchers who boast of the 'voltage enhancing' methods? Do we know what these methods are, and do we know that they do not have an impact on these occurences? We're beating ourselves with sticks, but has anyone actually taken a cell direct from China and tried it? I don't know if it is a factor, but why is it never discussed?
Neil's reminder on what you should do with the cells is timely - that's what is recommended. I am a little peeved that people ignoring this advice in the face of mounting evidence are putting my racing in jeopardy.
Quote:
Originally Posted by Chris Green
but then, wouldn't people will just charge at a higher current to give them a competitive advantage? thus making them unstable too?
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No. Sanyo cells could take anything you could throw at them. Back in the 1200 NiCad days, you could get a real fast run in Stock, by charging your cells direct from a 12v battery, without any problems! Even the 2400 cells were bombproof, and the set of 3000 (I think) Sanyo NiMh I have as a hack set on the bench for years still work fine - and they've been left flat, blitzed at 6A, and generally abused. I wouldn't dare do any of these things with IBs, and never have!!
Quote:
Originally Posted by Southwell
Eveyone in the know, knows you shouldn't re-peak 4200's. I personally charge them in enough time to just be cool or warm before i put them in the car.
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Ah... So I should ignore the re-peaking advice I got from a well-known person who develops motors and cells for a well-known European company... And he also said charge them in time for them to stand for ten minutes before they're run, irrespective of temperature. Oh well, he's obviously not in the know...
Conflicting advice; it's a bugger...!