Voltage and % on LifePo4

[nschizzano]

What voltage is at what percent on a lifepo4? And what's the lowest I should never go on my new litime lifepo4 12v 200ah 100bms. Thanks

 

[MiSh]

Pretty good general guideline.

 

[DIYrich]

LiFePO4 Voltage Chart?

Hi guys, I was looking through the mobile-solarpower.com website, and on this page I found a battery voltage chart for LiFePO4 batteries. But I noticed it wasn't showing the exact voltage ranges that my battery data sheet does. My data sheet shows 100% charge at 14.6V and 0% charge at 10.0V...

diysolarforum.com

Lowest: 2.5v per cell, or 10.0v for 4 cell 12v

 

[wattmatters]

What voltage is at what percent on a lifepo4?

The charge/discharge - voltage curve for LiFePO4 is very flat, which means voltage is a poor reference for state of charge, excepting at the very top and bottom. Below 3.0 V / cell there is bugger all capacity left, above 3.5 V / cell there is bugger all room left to take more charge.

Do not allow a cell to exceed 3.65 V nor drop below 2.50 V.

Link:

File:LIFePO4 charge discharge diagram.svg - Wikimedia Commons

commons.wikimedia.org

 

[Partimewages]

If you are trying to get an accurate SoC then voltage is not a good indicator. The battery curve as posted shows that. It's better to use a smart shunt to get an accurate reading.

 

[time2roll]

I find voltage to be close enough when charge or discharge is minimal such as 5 amps or less.

12.9 - 13.1 is a good time to get busy with some charging. 12.0 is getting urgent for a charge.