Sweden bans latest batch of IB4200

[mark christopher]

come on lets get back on topic, this may be out of turn, but the pc we have to put up with now is getting out of hand, we are alll entitled to opinions and we all have the freedom of speach, he has said what he felt, some may agree, some may not but lets just move on and not make a mountain of it.

[b4rs]

lol northy funny as!

joking aside, im sorry but i dint intend it to come across as racist.

i just ment that the working conditions they are in arent good enough and i wouldnt be suprised if they didnt bother making cells properly coz i wouldnt either.

Once again im sorry

p.s burgi, keep your comments to your self, theres no need in you to start avin a go aswell i realise i was in the wrong when i posted and my comment was sort of taken the wrong way but can fully understand how. i can spell but have u eva heard of TXT speach??? and i type pretty fast so sometimes i miss characters, which many people do.... im expected an A in english language so i doubt i cant spell tbh.

Anyway, sounds like a pretty bad thing if batteries are going to explode and u guys in sweden and belgium cant use em'

[millzy]

the old people on this forum dont take kindley to txt speak

[MK999]

I use predictive text, it knows full words.

[AndyM]

Originally Posted by burgie

nothing but the ill-informed, adolescent racist mind

you know mate, prejudice is just as bad as racism.

I think what b4rs said was a very harsh thing to write, but
Im 15, so im 'adolescent', and would never, EVER! be racist. to be honest, what you said actually offends me.

so dude, you shud 'practise what you preach' as they say. In other words, don't be so hipocritical.

rant over....

[b4rs]

im not a racist though?

[super__dan]

Originally Posted by millzy

the old people on this forum dont take kindley to txt speak

Or the ones getting old before their time (puts hand in the air).

[Scouser]

I wonder what the circumstances behind these exploding cells is. I mean, if someone is running two classes and re-peaking at too high a rate with no thermal cut off then it is understandable that something will go pop. If they are just charging them 'properly' and they go then all the panic is a little more understandable.
It would be nice to know a little more about the whole story and the situations behind each incident.

[SlowOne]

Just catching up on some posts...

In the Industrial Revolution in this country we did exactly the same things. We took people off the land, put them in slums of back to back houses, paid them low wages, made them buy from company shops and work long, long hours. From this came the Tort Laws and the Trade Unions. If the Chinese have the advantage of modern technology, and learning from history, where do you think they got the history and the technology from?

China is the longest lasting Empire on Earth, going back thousands of years. In that time, the Greeks, Romans, Vikings, Persians, Russians and every other dynasty has complained to China about its human rights record. Our human rights record in India (Ghandi) and Mesopotamia is just as appaling. They've gone, the Chinese are still here...

Before slinging mud at the Chinese, think about our record, and wonder who developed this behaviour first...

No one has any right to sling unsupported accusations at anyone about their race, colour or creed, whatever they think - it's against the Law. It isn't a point of view, it's a prejudice.

But, back in the thread, has anyone any more information about the choice of this batch of cells? And, at the risk of appearing daft, where does one find a batch number on an IB cell? (Don't tell me, it's on the button I just (shouldn't have) soldered the bar onto!! )

[mark christopher]

some one on rcracehat (i think it was) had a pack go in thier car two laps into the race, sure debris hit someone but no injury

[DCM]

right, txt speech, it does not potray your exact intent on what you mean, and really, it maybe one or two key strokes to spell the whole word, so spell it. Coming from an engineering background, really gripes me seeing people abusing the english language.

Chinese cell factory, I would of thought that these places are just as good/bad as any other cell factory in the world, although a pic I have seen of an EP4200 blown it's cap off does appear to be a manufacturing fault, but in making that many cells, one or two will slip through, just like we get dud memory for the pc and faulty cars.

I think banning a certain batch of batteries, is a very short sighted view of what is going on, and how people are treeting these batteries, there are a lot of people thinking and doing charging at 10A in the short belief it will give them an extra nth a second a lap. either drivers got to start to take responsibility of their charging regime, or maybe clubs should take a pro-active role in controling these drivers.

Although I do think the governing bodies need to go to the manufacturers of the cells and maybe negotiate a better cell and more robust.

[DanW]

I wonder if controlled destruction testing is the way forward for homologation of cells?

I.e. deliberately blow up the cells to find out...

A. how easy or difficult it is to blow them up
B. how much energy is released when they blow

If these things become homologation critera maybe cell makers will have to work on inproved vent designs etc to make the cells safer.

[DCM]

there are so many cells made, doing selective destructive testing would be pointless, the change has got to come from the manufacturer....

[DaveG28]

Another one went at our club tonight.

Admittedly the guy was repeaking at 7A!

[Chris Green]

oh dear! its happening more and more often then. Hope no-one was hurt.

Do you know how old the cells were? Is there any chance they were from this batch that is being banned over in Scandinavia?

I'll be charging my cells at 1C from now on for sure.

[DCM]

I think you have to negate the problem by charging at the lowest rate you can get away with, I know you got to turn the cells around in a certain time, but if the time is to short, charge the day before and then just repeak on the race day.

[Chris Green]

but re-peaking is a definite no-no with these cells? Or does that only apply if you re-peak freshly charged cells?

[GRIFF55]

Is there anything on the market that you can charge the packs inside, just as a safety measure? I know this would give me more peace of mind, even at home. If they do away with ib's, what would be the next best/safer thing?

[DCM]

none of the good cells are totally safe. I am sure just placing them in a tin or even a tupperware box would hinder an explosion.

Repeaking a just charged warm pack I think is asking for trouble, but one that has rested a day, no problems, I do that most times I race, just don't get the time in the day to charge, but the cell is always cold going on and only luke warm after.

[kyosho-viking]

Originally Posted by DCM

none of the good cells are totally safe. I am sure just placing them in a tin or even a tupperware box would hinder an explosion.

Repeaking a just charged warm pack I think is asking for trouble, but one that has rested a day, no problems, I do that most times I race, just don't get the time in the day to charge, but the cell is always cold going on and only luke warm after.

you looking for something like this??
http://www.b-p-p.com/proddetail.php?prod=1_BB&cat=15