01-05-2021, 04:17 PM | #1 |
Not Yet Wild
Join Date: Nov 2019
Location: Indio, CA
Posts: 49
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Lithium Batteries minimum charge before a recharge
Hi All-
On my Nissan Leaf Pack, I know I have my charger set to a max charge of 4.1 volts. At what point would you recommend a recharge? how many volts? I do have a 36v system so 41v is my max charge Thanks Jeff |
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01-06-2021, 02:05 PM | #2 |
Gone Wild
Join Date: Jan 2013
Location: Saint Petersburg, FL
Posts: 2,089
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Re: Lithium Batteries minimum charge before a recharge
I personally never go below 3.25vpc and usually recharge at 3.5vpc or higher.
Others may go lower, but the capacity below 3.25vpc is miniscule really and the pack V is 45.5 at 3.25vpc so the cart is going a lot slower at that voltage anyway. I charge to 4.1vpc for 57.4 total volts on my 14S pack. ---------- edit ---------- Since you have a 10S pack at 3.5vpc you'll be noticing a degradation in performance anyway. The cart will start to drag along since you are lower total V than your stock lead acid pack. |
01-06-2021, 02:11 PM | #3 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Lithium Batteries minimum charge before a recharge
I guess it depends on how far you are from the charger
There is only about 5AH left below 3.5v so you better be pretty close to charger. |
01-06-2021, 08:44 PM | #4 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,123
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Re: Lithium Batteries minimum charge before a recharge
As Sergio says, when you get down to 3.5V, you have almost no capacity left so that is a good lower limit. If you get the discharge curve for your particular batteries, you can estimate fairly accurately how much charge you have left at a given voltage. I try to never let my pack go below 20% SOC.
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01-06-2021, 09:46 PM | #5 |
Gone Wild
Join Date: Nov 2020
Posts: 215
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Re: Lithium Batteries minimum charge before a recharge
I have my audible alarm set at 3.3v per cell and low voltage cutoff at 3.25v, but Im using 12S on a 36v system.
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