Jack Rickard said the BMS started most the fires in the early days. Balance resistors heat. This Pack went up today and IDK why.

[Smokin]

Were Cookin Now.
This thing just went up in smoke. I was there when it happened. Lucky I guess.

 

[Bud Martin]

Wow! what is the brand of this cordless tool?

 

[Smokin]

Wow! what is the brand of this cordless tool?

Craftsman tool but the battery is Chinesium.

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I ordered the battery for the craftsman set of tools that had tired nicads. I didn't have the charger. I used a bench power supply to charge to 20.5 volts. This is common here to charge drill packs this way. However the meter on the pack only showed 1 light out of 4. The SOC meter lights didn't respond to charging. Strange. I only charged it 2 times. Today while tinkering around doing some wood work the smoke started pouring out. The impact drill was off laying there. Strange.

 

[Bud Martin]

Did you send the pictures to the seller? Luckily you are there when it happened.

 

[Smokin]

Did you send the pictures to the seller? Luckily you are there when it happened.

Yeah I agree. I'm reevaluating my Lithium Battery operation model now.

 

[Smokin]

I think I figured out what happened. The drill shorted out and caused the bms to burn. May be a case for removing the battery when not in use. Maybe

 

[Roqm]

I think I figured out what happened. The drill shorted out and caused the bms to burn. May be a case for removing the battery when not in use. Maybe

Leaving the battery in the tool leads to a slow drain on the battery....so i never leave them in and charge them before use....as long as its not dead i leave them at whatever voltage they are untill the next use....no issues since

 

[Abodyofscience]

I think I figured out what happened. The drill shorted out and caused the bms to burn. May be a case for removing the battery when not in use. Maybe

There's supposed to be internal circuitry protection against this worst case scenario.

It takes a lot of watts to do that much damage & the batteries may now have internal damage from overcorrect.

This

tcforensic.com.au

will give you idea of the temps.