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Old 12-17-2018, 11:57 AM   #7
Sergio
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Join Date: Sep 2012
Location: Charlotte, NC
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Default Re: Lithium Conversion

Quote:
Originally Posted by Fastest1 View Post
No BMS at the moment. Not sure if I will run one.
I dont have enough time with the batteries under load to see the drop.
After a 14 mile ride with 4 miles of that being WFO, the pack had lost 1 volt.
According to my calculations, my pack fully charged (4.05 per cell @ 56.7v) if 60% is used would bring the cell voltage to 1.62 v per cell or 22.68v for the entire pack. I am not sure where the low voltage cut off would be on the Navitas 600amp controller. It is rated for 36-60vdc operation.
Should be good for any driving I am doing.
I have never had a cruise end due to battery charge, lead acid or other.
That does not include when I bought the cart with spent batteries


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You need to read more on lithium battery math, 60% DOD is not the same as 60% Voltage.

A 60AH Nissan Leaf cell with a 90%DOD (10%SOC remaining) would have a cell voltage of 3.5v.
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