LIFEPO4 Battery discussion thread

DTBA said:
Took a chance on this https://www.bobshop.co.za/sunnew-sn...fepo4-wall-mount-inverter-battery/p/636132856
View attachment 1920051View attachment 1920052View attachment 1920053View attachment 1920054
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Was hoping for a pacebms but no luck.
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Nice. Why does the balance leads all go to a separate circuit? Does it mean it has an active balancer?

That said looks decent. Welded terminals. Sigh I think manufacturers are scared of terminal bolts loosening so they just end up welding them. Real pain if 1 cell gives an issue no quick fix.
 
cavedog said:
Nice. Why does the balance leads all go to a separate circuit? Does it mean it has an active balancer?

That said looks decent. Welded terminals. Sigh I think manufacturers are scared of terminal bolts loosening so they just end up welding them. Real pain if 1 cell gives an issue no quick fix.
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that was the coms wires from the front plug board to bms
 
Did you guys see a 5kw omni volt battery stand alone sold somewhere?

I need a 5kw old style pacebms battery with address switches

I got work for it
 
denmendez65 said:
Out of curiosity, we dont really check at a higher voltage? I am pretty sure if your charging voltage is higher than 56 you will hit OVP on cell 1. Or do we say if its like as you have it at 55.2 then its fine?
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I am pretty sure if I pushed charge voltage to 58v with 50 amps it will always hit ovp.

But my charge voltage is 55.7 after full it goes down to 55.2.

So yes you are right it will hit ovp. But ill never touch that voltage in my system
 
denmendez65 said:
Out of curiosity, we dont really check at a higher voltage? I am pretty sure if your charging voltage is higher than 56 you will hit OVP on cell 1. Or do we say if its like as you have it at 55.2 then its fine?
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3.65V x 16 = 58.4V

So a perfectly balanced pack shoukd reach 58.4V. At the same time one doesn’t really need to hit such high voltages as battery shoukd be absorbed at 55.2V with some absorbing time.

So, it shouldnt hit ovp at 58V.
 
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DTBA said:
I am pretty sure if I pushed charge voltage to 58v with 50 amps it will always hit ovp.

But my charge voltage is 55.7 after full it goes down to 55.2.

So yes you are right it will hit ovp. But ill never touch that voltage in my system
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Did it absorb? Did 50 amps taper off?
 
Zurg said:
I've used these guys before, https://lithium-cells.co.za/ they're based in pretoria.
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another option:
cellsupplysa.co.za

EVE MB31 (314 Ah) 3.2V LiFePO4

EVE MB31 LiFePO4 Cell Description: The EVE MB31 LiFePO4 cell is engineered for high performance and safety, making it ideal for various applications, including renewable energy storage and electric vehicles. With a nominal voltage of 3.2V and a cycle life of up to 4000 cycles @ 80% DOD, this...
cellsupplysa.co.za cellsupplysa.co.za
 
wingnut771 said:
another option:
cellsupplysa.co.za

EVE MB31 (314 Ah) 3.2V LiFePO4

EVE MB31 LiFePO4 Cell Description: The EVE MB31 LiFePO4 cell is engineered for high performance and safety, making it ideal for various applications, including renewable energy storage and electric vehicles. With a nominal voltage of 3.2V and a cycle life of up to 4000 cycles @ 80% DOD, this...
cellsupplysa.co.za cellsupplysa.co.za
Click to expand...

Yeah seen then before.
I have a buddy that builds and machines the busbars, going with lithium titanate.

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