lipo cells

[wbridge]

hi another crazy question, ivejust brought a new saddle pack and used it barely a few times, now i went to check them today before my racing sunday and there is a tiny ammount of bulging from the casings, what is best to do?


thanks in advance

[wbridge]

i should mention i stored them fully charged , but now im discharging them slightly to see if the small ammount of bulging goes down

question is are they still safe to use?

[Lee1972]

Best advice is don't store them fully charged as this will cause them to swell. I generally rotate our packs during racing and if we're racing outdoors and have limited power supply I'll charge them up the night before. Any packs unused on the day when I get home I'll put on a storage charge cycle.

[wbridge]

will discharging them reduce the swelling? its not much to be honest ,i can still clamp them in the car, and there new so id like to save them if i can , if its not to risky to use then ok, ill just not store them again fully charged

[mattr]

Originally Posted by wbridge

i should mention i stored them fully charged

Why? That's in the beginners guide to LiPos, store with a storage charge or after they've been used............

Originally Posted by wbridge

question is are they still safe to use?

Quite probably. I've run very slightly/just visibly swollen cells for months. When they go properly, its painfully obvious. Can't get the battery strap down, the side of the case cracks etc etc. You just need to keep a close eye on them. Check after every run/charge type thing.

What sort of cells are they (brand/capacity) as i've found that the really high capacity cells have a lot more "stuff" inside them, so even a very very slight swell, that is perfectly normal, can make the case look dodgy.

[wbridge]

because i just did what i have done with lipos for a long time, never had a problem before , and there 6000mAh 80c 22Wh cells

so higher capacity than my others, ill keep them on storage when not in use from now, other wise ill keep using them and a good eye, right now ive put them down to storage , so i would guess they will be ok

[mattr]

I would suspect that most of your other lipos are also swollen in the same manner, except you can't see that as the case hasn't budged!

[wbridge]

i would guess the same thing, so im going to put them all on storage, i guess they will be ok (others still work ) , feel bit stupid but lesson learned

thanks