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Hard to open Bosch pack
#1


How do I proceed from here? Anyone seen it before? Is it glued in place?
Cells tested: 4087
Average capacity: 2082 mAh
Left to process: 165 kg
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#2
It's a single piece of plastic and this can't be opened further without destruction. The cells can be pushed out lengthwise after all the connections have been removed. It might require a bit of force, always push them from their negative side.
Probably not worth it though as the cells are rusting.
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#3
I have stripped one of those recently. Total PITA and a waste of time.

I ended up cutting the plastic with a hacksaw and split them out.
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#4
The ones I've opened have the 2 plastic parts being held together by special screws.

You need something like this to unscrew them:

Make sure you get the version with holes on the end as most power tool screws also have a bump that prevents you from using standard/flat  ones.
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#5
(02-28-2019, 09:35 PM)winny Wrote: How do I proceed from here? Anyone seen it befor? Is it glued in place?

That looks like a tough one.
I don't see anywhere to split the red holder. Had to be put together somehow though. Possibly ultrasonic weld like laptop packs.
As far as the proper tools to take apart some of the other packs. It's called a tamper proof security torx screw.
Don't know why they call it "Tamper Proof" as they do sell the tools so you can tamper with it. Dodgy

But yea the cells look a bit on the shabby side besides they are Sanyo UR18650A 2100mAh not a bad cell but........ maybe worth the effort.

Wolf
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#6
(03-01-2019, 11:54 AM)Overmind Wrote: The ones I've opened have the 2 plastic parts being held together by special screws.

I have had these too in the past (PITA even then), but this one is one solid piece of plastic, so perhaps newer or older model. I'm afraid I will break the cells if I push any harder and there is a very small gap where say a hacksaw or dremel-tool would be able to cut though the plastic without damaging the cells.
Cells tested: 4087
Average capacity: 2082 mAh
Left to process: 165 kg
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#7
You could remove all soldered connectors and wired and maybe you can pull/push the cell rows out.
If not, just cut it open with care so you don't damage the cells.

@Wolf, yes they are Sanyos. Good picture find of the tools.
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#8
Those cells don’t look so good though, might not be worth the battle!
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#9
Any cell is worth saving, just like any Klingon can fight a little more until death sets him free ! Big Grin
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#10
I took apart several similar packs using a box cutter knife. Just kept slicing at the same line until I was through, then split the whole thing apart with brute force.
On some, they also like to epoxy the cells into place. Just slice the sleeve and push out the cell, then resleeve.
Modular PowerShelf using 3D printed packs.  60kWh and growing.
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