cfrgsn1
1 mW
Hi, just wanted to point out once again that you can never be to careful when using lipos. I just had a 24s 5ah lipo pack burst into flames while charging. To charge i split the pack down to 6s4p and balance charge using a rc charger. I was in the shed while it was charging outside, when i heard the charger make it's charging is finished noise, walked outside to hear the pack hissing, while the voltage on the charger read 23.84v. I quickly unplugged the charger and wheeled the bike into the middle of the yard. Turned back to get the hose and withing 10 seconds there was a roaring fire with a 1m jet of flame coming from the battery.
It took about 10 minutes for the fire to go out, even with the hose to try and limit the damage to the rest of the bike. Damage to the bike was minimal, with only the back tire melting, and the brake/gear cables being destroyed. Thankfully the controller and motor weren't damaged. I only have a vague idea what caused it, the batteries were discharged to around 22.3v per 6s prior to charging, however they have been pushed pretty hard, being a few years old, and recently changing from a 48v 20amp controller to the 96v 65a controller.
Anyway, if this had happened inside, the results would have been disastrous, I thought that i was following the lipo rules, and then this lipo pack exploded without much warning, no swelling, no overvoltage, and no physical damage to the pack. A possible thought would be that the pack temporarily over discharged while trying to draw so much current from it.
It took about 10 minutes for the fire to go out, even with the hose to try and limit the damage to the rest of the bike. Damage to the bike was minimal, with only the back tire melting, and the brake/gear cables being destroyed. Thankfully the controller and motor weren't damaged. I only have a vague idea what caused it, the batteries were discharged to around 22.3v per 6s prior to charging, however they have been pushed pretty hard, being a few years old, and recently changing from a 48v 20amp controller to the 96v 65a controller.
Anyway, if this had happened inside, the results would have been disastrous, I thought that i was following the lipo rules, and then this lipo pack exploded without much warning, no swelling, no overvoltage, and no physical damage to the pack. A possible thought would be that the pack temporarily over discharged while trying to draw so much current from it.