Cleaning out the vents

Dr. Dickie

Member
Joined
Sep 23, 2020
Messages
142
The 18650s that I have collected came out of medical packs that were sealed inside a case of an injected rubbery substance.
In digging them out, some, heck most of the cells have some amount of the rubber stuff in the vent holes.
18650 with Green insulator.jpg


This is an extreme example, most have a few of the vents open.
Even after removing the green insulator
18650 without Green insulator.jpg


There is rubber stuff in the vents.
Obviously, this is not strong enough to prevent a pressure release (this pack design had to pass some inspection for medical use), but it still should be cleaned out. I plan to pick as much as I can out with a toothpick then blow the rest out with compressed air.
Is my plan flawed? Anything that I am missing?
Thanks (and I was digging in the backyard to get set for my new solar array, so yes my fingernails need cleaning).
 

floydR

Well-known member
Joined
Aug 23, 2017
Messages
1,062
I had 16 of the Rubberized Battery packs. I need to go though the cells and make sure the vents are clear. As I was testings I cleaned the rubber from the vents but may have missed some. But that will have to wait have two fences that need repaired and one fence that my neighbors and I are replacing in the next three weeks.
Later floyd
PS I don't think you are missing anything, but would be careful with the compressed air. Use low pressure.
 

Dr. Dickie

Member
Joined
Sep 23, 2020
Messages
142
I had 16 of the Rubberized Battery packs. I need to go though the cells and make sure the vents are clear. As I was testings I cleaned the rubber from the vents but may have missed some. But that will have to wait have two fences that need repaired and one fence that my neighbors and I are replacing in the next three weeks.
Later floyd
PS I don't think you are missing anything, but would be careful with the compressed air. Use low pressure.
Yeah, thanks. So far I have just been blowing into them, but I think I need a bit more than that.
Thanks
 
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