Battery Identification and Recommendations

[mjsfbay]

I was able to track down more details about battery packs I acquired but could not figure out how to use. Each pack comprises 56 prismatic cells but looks like it can be broken down into smaller pre-fabricated sections for 28.

With buss bars in series:


Attempting to charge to 3.7V when I still believed these were LiFePO4 cells:



Full bank - (8 packs * 56 cells) or (16 packs * 28 cells):



Each cell has the following characteristics as printed on each visible cell:



- CA1 060G6
- +3.7 V
- 37.0 Wh
- 10000 mAh
- BM1740310368
- Barcode



The seller recommended I look at this make and model for specs:

If true, these are EV battery packs made by Cummins, model: BM44E
Tech specs of similar models found Here.

If this information is accurate, these are Lithium NMC cells

Questions:

1. How would you charge each pack?
2. Would you keep it inside your home?
3. If this is a lithium-ion NMC battery pack, what would be its best use?

Thanks for any advice!

 

[NVS]

I was able to track down more details about battery packs I acquired but could not figure out how to use. Each pack comprises 56 prismatic cells but looks like it can be broken down into smaller pre-fabricated sections for 28.

With buss bars in series:
View attachment 68519

Attempting to charge to 3.7V when I still believed these were LiFePO4 cells:
View attachment 68520


Full bank - (8 packs * 56 cells) or (16 packs * 28 cells):
View attachment 68517


Each cell has the following characteristics as printed on each visible cell:

View attachment 68512

- CA1 060G6
- +3.7 V
- 37.0 Wh
- 10000 mAh
- BM1740310368
- Barcode

View attachment 68514

The seller recommended I look at this make and model for specs:
View attachment 68515
If true, these are EV battery packs made by Cummins, model: BM44E
Tech specs of similar models found Here.

If this information is accurate, these are Lithium NMC cells

Questions:

1. How would you charge each pack?
2. Would you keep it inside your home?
3. If this is a lithium-ion NMC battery pack, what would be its best use?

Thanks for any advice!

These are Lithium ion batteries. Which you would charge to 4.2 volts. Use a 7s configuration for 24v battery and 14s for 48v battery.
What you have look a lot like these.

SPIM08HP 3.7V 16AH - Excellent Lithium Ion Power Cells

CELL HOLDERS, THREADED INSERTS, AND BOLTS INCLUDED. YOU CAN BUILD YOUR PACKS WITH JUST A WRENCH. WE HAVE THE BUSBARS FOR SALE AS WELL OR MAKE YOUR OWN. THESE MODULES ARE 3.7V 16AH AND THEY CONSIST OF 2X SPIM08HP 8AH CELLS IN PARALLEL. THERE IS A THREADED INSERT WITH THE BOLTS ALREADY ON. IT...

batteryhookup.com

And there has been a lot of things built using them. And a lot of videos on YouTube.

 

[mjsfbay]

These are Lithium ion batteries. Which you would charge to 4.2 volts. Use a 7s configuration for 24v battery and 14s for 48v battery.
What you have look a lot like these.

SPIM08HP 3.7V 16AH - Excellent Lithium Ion Power Cells

CELL HOLDERS, THREADED INSERTS, AND BOLTS INCLUDED. YOU CAN BUILD YOUR PACKS WITH JUST A WRENCH. WE HAVE THE BUSBARS FOR SALE AS WELL OR MAKE YOUR OWN. THESE MODULES ARE 3.7V 16AH AND THEY CONSIST OF 2X SPIM08HP 8AH CELLS IN PARALLEL. THERE IS A THREADED INSERT WITH THE BOLTS ALREADY ON. IT...

batteryhookup.com

And there has been a lot of things built using them. And a lot of videos on YouTube.

Thanks for advice NVS,

Issue I'm having is individually charging 56 * 8 (448) cells. I'm trying to find the best way to do that, which I haven't yet found through YouTube or Google.

Being new at this, and dealing with 56 cell packs, I haven't been able to figure out the safest and most efficient way to charge and connect these packs in series.

Even if after doing so, I haven't gathered enough info to determine how safe it is to keep these cells inside my home. It's clear to me, after watching this video (Battery safety: NMC vs LiFePO4 nail penetration test) that I'm putting my home and health at risk by keeping this battery bank near living spaces.

​

 

[mjsfbay]

I'm running into an issue with these batteries and hoping that someone can help me out.

- I'm trying to top-balance these batteries (is this really necessary)?

- The only way I'm aware that I can avoid charging the cells in this pack 1 at a time (56 cells per pack x 8 packs) is to put them in parallel. The problem is that the packs consist 4 rows of 14 cells.

- I've spent the last 3 days charging just one row of 14 cells in parallel, and it's still at 3.96V. With this method, I'd need to spend 12 days charging each of the 8 packs. So 96 days... this cannot be right.

Is anyone available to help work the kinks out of this.... kinda struggling here.

Thanks!