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[SimonCornes]

Having had a house fire due to thermal runaway whilst charging a 3S Lipo within the last few weeks I'm a bit sensitive about 'iffy' batteries. The one that went 'critical' whilst I was putting it into a storage charge was a hard case battery and it was 'a bit swollen'. How much is too much? A bit of a grey area but I looked at the batteries twin and came to the conclusion that that was also 'a bit swollen' too so I think the safest thing - for me anyway - would be to discharge it and then the recommended action within my club is to leave it in a bucket of salt water for a week until its utterly dead.


I have already discharged a 2S LiPo but I thought the voltage on completion would be next to nothing, instead its 6V or so. Is that correct? I have a new Giant[/size][/color][/size]Power Intelligent Balance Charger [/color][/size]G6AC[/color][/size] 50W 6A 12/220V care of Component shop which I've not yet used but I have - the previous one was destroyed in the fire - but I have used a spare but virtually identical Radient intelligent charger but I'm wondering if just setting the charger to 'discharge' is enough? [/color]

[/size]Any advice such appreciated so that I can dispose of these two incendiaries! [/color]

[JimG]

Most chergers won't discharge a battery completely, I use a 12V taillight bulb wired to a suitable connector and plug this in to a part discharged pack. (1 to 4S) . When no light is visible the battery is near totally discharged, complete discharge can be done by then shorting the cells, the voltage is so low that this is safe to do this.Alternatively leave the pack in a container of salt water, this does take longer. The cells can then be disposed of, I generally take 1 more step by slitting the cells in a container of water and leave them for a few days, this will destroy any unreacted lithium in the cell, they can then be disposed of with normal household waste. (make sure the cells are fully discharged using the bulb before doing this)For larger packs I have a connector with crocodile clips for the bulb, I open up the end of the pack to expose the connections and treat it as 2 packs for dischargeing.
Jim

[Martin (Admin)]

 
Found this: https://www.grepow.com/blog/how-to-discharge-a-lipo-battery.html