Author Topic: Testing LiFePo4 cells  (Read 16028 times)

Offline Just

  • Confirmed
  • Master of Magic
  • *****
  • Posts: 470
Re: Testing LiFePo4 cells
« Reply #15 on: September 30, 2012, 03:24:07 PM »
The iCharger 1010b+ charger costs about $130. Is there a cheaper way to measure an internal resistance of the cells? 

Offline Lollandster

  • Confirmed
  • Bachelor of Magic
  • ****
  • Posts: 186
  • Norway
Re: Testing LiFePo4 cells
« Reply #16 on: September 30, 2012, 04:16:10 PM »
The iCharger 1010b+ charger costs about $130. Is there a cheaper way to measure an internal resistance of the cells?
If you have a Cycle Analyst or similar you can probably use the method mentioned my Justin at endless-sphere here


Quote from: justin_le@endless-sphere.com
Just be sure to input your battery internal resistance by looking at your pack voltage before and after applying full throttle, then use RBatt = (V1 - V2) / A, where V1 is the voltage with no throttle, V2 is the voltage at full throttle, and A is the current limit of the controller.
« Last Edit: September 30, 2012, 04:20:26 PM by lollandster »
Disclaimer: I know nothing.
My ebike Build blog