roly1
New Member
I have just received my first shipment of LiFePO4 cells to update my bank.
They seem to spec with a 0.002 max difference in voltage.
They are CALB 230Ahr contained in an aluminium case covered in thin plastic
insulator with rather large aluminium terminals lasered to a flat round terminal stud from battery.
I am concerned that insulation between the square terminal (-ve) and the aluminum case is <1mm thick plastic and could imagine it could easily be a point of failure.
The AL case seems to have positive polarity relative the negative terminal and voltage same as battery. Is this normal; seems like this is not right to me?
I'm tempted to run a 50ohm resistor from case to negative and measure the current.
Even if it is not capable of moving significant current, the prospect of leakage doesn't thrill me.
Edit: On a search I found this is is normal MO for LiFePO4. Not what I would have expected!
I will be doing a rather elaborate insulating FG pouch for each cell and maybe a supa sealant under the
edge of each cell neg terminal. (Or try an swap out for plastic cases with the vendor)
Plus an enclosure to keep out sea elements.
They seem to spec with a 0.002 max difference in voltage.
They are CALB 230Ahr contained in an aluminium case covered in thin plastic
insulator with rather large aluminium terminals lasered to a flat round terminal stud from battery.
I am concerned that insulation between the square terminal (-ve) and the aluminum case is <1mm thick plastic and could imagine it could easily be a point of failure.
The AL case seems to have positive polarity relative the negative terminal and voltage same as battery. Is this normal; seems like this is not right to me?
I'm tempted to run a 50ohm resistor from case to negative and measure the current.
Even if it is not capable of moving significant current, the prospect of leakage doesn't thrill me.
Edit: On a search I found this is is normal MO for LiFePO4. Not what I would have expected!
I will be doing a rather elaborate insulating FG pouch for each cell and maybe a supa sealant under the
edge of each cell neg terminal. (Or try an swap out for plastic cases with the vendor)
Plus an enclosure to keep out sea elements.
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