Are these Pouch type cells ?


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Old Seagull Man

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Aug 2, 2020
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Im guessing they are. and am wondering, if i can treat as if they were prismatic, when i build.
or are there special considerations.?
 

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OffGridInTheCity

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I can't tell but it looks like they are already secure in their own 'green containers' - no further action needed unless you're planning to open the containers and re-arrange the cells inside to make a custom battery. in that case, I would create a new container that mimics the green containers in compression / strength - e.g. if they are snugly packed in the green container then create a new container that is snug.
 

Old Seagull Man

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Aug 2, 2020
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Thank you kindly for the speedy reply.
My intention, was to simple cable the green blocks, together on a steel shelf, and form a 48v 150ah battery.
And if others became available, simply add them to the next shelf. And grow the battery.

More questions will follow,I'm shore.

OSM.
 

Old Seagull Man

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Aug 2, 2020
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These Battery packs Have a working BMS, but its not a smart one. The reason these were taken form service is some of the cells have failed.
But there are enough units for me to swap out the dead ones, with other existing and end up with 4 12v 150ah battery's that i was just going to connect in series, to make a 48v 150AH unit.

But I wouldn't know what the stat of balance of the four cells in each pack was.
I could add an RC type cell monitor to each of the packs. And this would give me a display of the voltages of each of the four cells in each pack and give me some indication of there state. And I would know if the individual BMS's are working. But it wont balance the whole 48 volt output.

So Im looking for suggestions, or ideas, to get this under way. If you know of a simple BMS that will control all the battery's and give me a SOC and AH in and out reading.

Please share your wisdom.

Thank you All.
OSM.
 

OffGridInTheCity

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Dec 15, 2018
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If you can open the packs (swap out bad cells) then perhaps you can cut-out the old/bad BMSs. If it's 4 cells per 12v, then it's likely LifePo4 cells.
Are you up for DIY re-wiring of a new BMS? If so, after discarding the old BMSs, wire in a new 16s BMS such as DALY. (Others have their favorites). The 16s (4 x 4cells) will give you an overall 48v battery that's monitored/protected.

Note: A decent BMS will protect and balance the cells and show voltages - but to track power in/out you need a shunt.

For power you can buy a cheaper meter you read such as this - https://www.amazon.com/gp/product/B07B4CWKRJ/ref=ppx_yo_dt_b_search_asin_title OR for iPhone bluetooth monitoring you can go high end like this - https://www.amazon.com/Victron-SmartShunt-500AMP-Bluetooth-Battery/dp/B0856PHNLX/ref=sr_1_3
 
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