High Amp battery test

Test Results for Kokam SLPB 60460330 and Kokam SLPB 100216216 cells at 10C


A constant 10 C discharge is not recommended by Kokam!
This was for our test purposes and could damage the battery.
Kokam recommends 5 C continuously, 10 C peak.

Below are links to three text files. These are the raw data files from testing a Kokam cell on the ProEV's Battery Evaluator.
The Battery Evaluator charges the cell from a battery bank and discharges the cell through resistors. The software reads through a Labjack U12 DAQ board (www.labjack.com) and it's readings were calibrated to an E-meter. There is some room for error in the calibration and there are major fluctuations in the amp discharge rate due to some quick and dirty control software writing. It was accurate enough for our test purposes.

For these tests we used the following charge algorithm.
The cell is charged at constant current at 1 C (40 amps and 70 amps respectively). When the voltage reaches 4.235 (The manufacture suggest 4.200 as a better cut off voltage), the charge changes to constant voltage until the average current drops to .1 C for a certain amount of time.

The data headers are:









test #
This is a test of the 40 amp/hr battery.
This is the first test of the 70 amp/hr battery. One side was insulated by a foam container. The discharge was aborted when the temperature reached the manufacture specified maximum temperature of 60 degrees C. The control software is pretty bad and spends half the time closer to 600 amps than 700 amps.
This is the second test of the 70 amp/hr battery. The battery is resting on two blocks of wood so there is air flow on both sides. It is getting some cooling from a fan cooling the Battery Evaluator. The control software has been improved and holds the amps closer to 700.


Finding better batteries
back to battery testing log menu
Establishing a baseline


All content Copyright © 2016 ProEV Inc.,
USA phone (305) 610-6412
email: info@ProEV.com

Go to ProEV Home