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› I opened a lipo...cell
05-15-2017 06:06 PM  39 days agoPost 1
heliraptor10

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kokomo, in-US

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The fifth cell of my pulse battery had higher ir when I got it a couple years ago, I was the third owner.

This year the ir on that cell climbed suddenly,
And as it could relate to my emf boosting experiments I decided to dissect it.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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05-15-2017 06:11 PM  39 days agoPost 2
heliraptor10

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kokomo, in-US

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Goblin! where have you been all my life?
RC helis, the original fidget spinners

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05-15-2017 06:16 PM  39 days agoPost 3
heliraptor10

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kokomo, in-US

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Goblin! where have you been all my life?
RC helis, the original fidget spinners

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05-17-2017 03:32 PM  37 days agoPost 4
heliraptor10

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kokomo, in-US

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Some conclusions I've drawn

Let me know if I'm wrong
Somebody will

The electrolyte in lipos is a liquid,
But there is not much of it, the layers were only wet enough to notice that something was evaporating.

This cell's COD seemed to have been a side impact early in its life. The dent brought layer edges closer by changing the angle (like air conditioner fins) and damaging the plastic. The metal was exposed and silvery on this spot, whereas scraping revealed it to be copper. My guess is that over time it reacted more and more on that spot, taking more of that cell out of commission.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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05-17-2017 05:21 PM  37 days agoPost 5
JuanRodriguez

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The Villages, Florida

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I'm waiting for your video on "putting out lipo fires to save my house "..... should be a best seller !!!

Been there, done that and old enough to know better.....

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05-17-2017 06:16 PM  37 days agoPost 6
BeltFedBrowning

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Kansas City

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Interesting. Did you get any pics of the dent/damage?

perfer et obdura; dolor hic tibi proderit olim

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05-17-2017 08:52 PM  37 days agoPost 7
heliraptor10

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kokomo, in-US

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Not sure that might be it on the side pic there can't zoom with my phone.

As for fire,
It was explained that puncturing the cell doesn't cause the fire.
Metal making the layers short as you pierce them is.

Though I learned of this long ago,
I had no reason to want to open one till now.

I did it out doors and super careful,
Because as certain as I was...
I was nervous still.

Started at the seam with an xacto small angled cut partially through the flap,
Then finished with plastic silverware.

Ultimately disposed of it in saltwater.

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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06-06-2017 04:00 PM  17 days agoPost 8
EEngineer

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TX

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That's what they look like.

When the element lithium(which is a metal) is exposed to air(oxygen), a violent chemical reaction occurs.

Used to demonstrate that in chemistry class....sodium does it too, but not as reactive.

Be careful, though

Logo 600SXs, 700XX, 800XX

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06-14-2017 08:23 PM  9 days agoPost 9
heliraptor10

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kokomo, in-US

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The lack of reaction here could be due to the cell being nearly dead.

But as I understand it lithium polymer batteries don't have true lithium metal.

So who knows?

I do have a "good" cell that I ruined the tabs on, I may take a "stab" at it

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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06-14-2017 08:28 PM  9 days agoPost 10
EEngineer

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TX

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Take a fully charged "good" pack and shoot it with a .22....

And watch it "fire up" when exposed to the atmosphere.....

Logo 600SXs, 700XX, 800XX

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06-14-2017 09:07 PM  9 days agoPost 11
heliraptor10

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kokomo, in-US

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If I open another one I'll make a video

Goblin! where have you been all my life?
RC helis, the original fidget spinners

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06-14-2017 09:53 PM  9 days agoPost 12
BeltFedBrowning

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Kansas City

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Thanks

perfer et obdura; dolor hic tibi proderit olim

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