Angry Andy
New member
- Joined
- Jul 3, 2021
- Messages
- 7
Hello everyone Im glad to find this forum...
Im new to the battery pack design and build, and I would like to find people near me in the SF bay area (I live in Concord) to possibly help me build up a powerwall, and I can also help them with used 26650 cells....possibly if we can work together I will supply cells for the both of us and we can both benefit each other.
I have found a bunch of 12v 16ah battery packs in the recycle bins at work. I have a huge supply of them. They were used in parking meter stations. They are two cells glued together and connected in parallel via a busbar with connector. I have removed the busbar and connector and took a picture of the cells.
I took a dozen or so home and started testing them. Some are dated, some are not. Found some dated from 2020, so I assume they dont have many cycles on them.
I have a hobby charger I used to rebuild a couple Prius battery packs with, but not sure how to use it to charge/discharge these 26650 packs. Got a Lii 500 and a Opus c3400 on order to get these batteries tested....but working tonight with my current hobby charger (pic attached)
https://www.amazon.com/gp/product/B07LF1SC63/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I think I might have figured out what settings to use with my current chargers, but not sure still...
So I cut one open, and found it has a BMS inside, and its a 5p4s pack with blue batteries labeled "HTCF-26650-3200mAh-3.2V" date 2018-05-30
Some of the packs I tested came out great at the posted 16ah, but about half have not. Im not sure if it is a BMS issue or bad cells, or whatnot. Hence I cut open a couple packs and took pictures.
when I try to seperate the cells from the pack, the glue they used tends to break the shrink wrap in spots....from reviewing videos that is not good and those cells should be re-wrapped.
But they are already spot welded in parallel, and I kinda want to keep them as such and test the parallel group.....but maybe I should break the whole pack down to single cells and test them all that way??? But if I do that then I have the spot weld on top and I dont want to tear that off. Can I keep them in a parallel pack (with shrink wrap torn) and just tape the whole group with some electrical tape? Scotch33+ is what I use.
So this is where I am at now, learning, reading, watching videos, reading posts......and asking.
I would love it if there were people nearby me that we can work together with.....
Im looking to make multiple 48v packs in metal enclosures or ammo cans or whatever to wire them all in parallel.
thanks to all for helping here.
Im new to the battery pack design and build, and I would like to find people near me in the SF bay area (I live in Concord) to possibly help me build up a powerwall, and I can also help them with used 26650 cells....possibly if we can work together I will supply cells for the both of us and we can both benefit each other.
I have found a bunch of 12v 16ah battery packs in the recycle bins at work. I have a huge supply of them. They were used in parking meter stations. They are two cells glued together and connected in parallel via a busbar with connector. I have removed the busbar and connector and took a picture of the cells.
I took a dozen or so home and started testing them. Some are dated, some are not. Found some dated from 2020, so I assume they dont have many cycles on them.
I have a hobby charger I used to rebuild a couple Prius battery packs with, but not sure how to use it to charge/discharge these 26650 packs. Got a Lii 500 and a Opus c3400 on order to get these batteries tested....but working tonight with my current hobby charger (pic attached)
https://www.amazon.com/gp/product/B07LF1SC63/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I think I might have figured out what settings to use with my current chargers, but not sure still...
So I cut one open, and found it has a BMS inside, and its a 5p4s pack with blue batteries labeled "HTCF-26650-3200mAh-3.2V" date 2018-05-30
Some of the packs I tested came out great at the posted 16ah, but about half have not. Im not sure if it is a BMS issue or bad cells, or whatnot. Hence I cut open a couple packs and took pictures.
when I try to seperate the cells from the pack, the glue they used tends to break the shrink wrap in spots....from reviewing videos that is not good and those cells should be re-wrapped.
But they are already spot welded in parallel, and I kinda want to keep them as such and test the parallel group.....but maybe I should break the whole pack down to single cells and test them all that way??? But if I do that then I have the spot weld on top and I dont want to tear that off. Can I keep them in a parallel pack (with shrink wrap torn) and just tape the whole group with some electrical tape? Scotch33+ is what I use.
So this is where I am at now, learning, reading, watching videos, reading posts......and asking.
I would love it if there were people nearby me that we can work together with.....
Im looking to make multiple 48v packs in metal enclosures or ammo cans or whatever to wire them all in parallel.
thanks to all for helping here.
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