Explosion! Fire!

[vertman]

Boat suddenly stopped in the middle of the pond. Sat still for about 20 seconds and then BOOM! Blew the lid of my Revolt 30 about 10 feet into the air and then she burned..... was able to send my rescue boat out and tip it over to minimize fire damage.

Turns out the Lipos both exploded.

I had run my setup numerous times with some heat but nothing crazy. The esc was fire damaged but otherwise appeared fine.

Why would the lipos explode? How do I prevent that from happening again?

I have pics and will upload when I figure out how to do it.

[Luck as a Constant]

What batteries?


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[jim82]

always run the highest lipos c rating that you can afford and watch the temps!

[Chilli]

The odds of both Lipo's going at the exact same time are very low unless there was some sort of short circuit or catastrophic ESC problem. Perhaps a connector got hot and desoldered. Who Knows?? Let's wait until we see some pics.

[T.S.Davis]

Stock setup?

[ray schrauwen]

I'd say they missed a LVC and drained so low they went up. I did this 3 years ago in a 6S mono using 4500mah 6S2P 25-35C nano-techs.... Speedo survived to run the next season but, it too went up in smoke from the damage caused by the batt melt down the year earlier. If the cap blew on the esc it could cause the hatch to go up.

That or the ESC failed with a dead short???

[T.S.Davis]

I remember that Ray. Smelled fantastical.

Weird to have two packs fail like that.

I'm predicting over discharge too.

[T.S.Davis]

Not really fair to blame the cells. He's right. Not without more information.

Howeverrrrr.....r................I've discharged batteries right down until the EOS said 0%. Think I heard it laugh. My charger wouldn't recognize them as a 4s pack. Had to first charge a 4s pack at 3s until the voltage came up enough to charge at 4s. Those were high dollar cells. They didn't flame out and I finished the season with them.

Still doesn't mean it was the cells in this case. I'm just saying that better cells are more forgiving when you do something stupid to them.

[HangTheMan]

I'd say they missed a LVC and drained so low they went up. I did this 3 years ago in a 6S mono using 4500mah 6S2P 25-35C nano-techs.... Speedo survived to run the next season but, it too went up in smoke from the damage caused by the batt melt down the year earlier. If the cap blew on the esc it could cause the hatch to go up.

That or the ESC failed with a dead short???

I am asking because I don't know, but do LiPos really explode when discharged completely? I recently received two new Turnigy Heavy Duty batteries from HK that had individual cells at 0.97 volts. Kinda scary to thnk those could explode at anytime given that is completely dead voltage wise.

[Fella1340]

C'mon guys, the best explanation given the evidence is a spark flew off the motor, hit a cap which blew up scaring the hell out of the lipos making them explode. I stand by that, given the evidence.

[Peter A]

[vertman]

They were Zippy 30c 4000mah from HK running 6S on a 120a Turnigy ESC on a M445 prop. Little too much? Lol. She ran 52 mph on glass. That was before the explosion. I will post pics when I get to sit down at the computer. I was using 4mm Bullitt connections for the motor to esc and traxxas connectors on battery. They were all intact even after the fire.

[Bryan73]

Ouch! Never a good feeling when something like that happens. I have a good friend, who just last year, had a Gens Ace lipo in his plane explode during flight.

[kevinpratt823]

They were Zippy 30c 4000mah from HK running 6S on a 120a Turnigy ESC on a M445 prop. Little too much? Lol. She ran 52 mph on glass. That was before the explosion. I will post pics when I get to sit down at the computer. I was using 4mm Bullitt connections for the motor to esc and traxxas connectors on battery. They were all intact even after the fire.

What boat, what motor, and what kv?

[photohoward1]

Guys when the batts are discharge they have very little energy left. Trust me I know. When I'm done with my packs I shoot a mail through them with a framing nailer. If they are not charged very little happens. They smoke a bit. Fully charge them and hit it with a nail gun and then the fun starts. BTW. I do not in any way condone this activity. But it is fun.


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