LiFePo4 Battery 5C practical Testing report

[Doctorbass]

That surprise me alot!.. i would be curious to test one of these cells personally..
Examinating your test data that would mean your cell at 5C give (23.3V / 8cells = 2.91V/cell)at 5C at half energy discharged..

I precisely measured the Headway38120S 10Ah cell at 3.5C and i got 2.85V at half the energy discharged

If your results are acurate and true, that would mean your cell seems better than the Headway we know...

Like i said... I would apprecite to get some samples to test them with the same acurate system have...

The 5C results you give simply surprize me!

Can you specify the charging voltage you used before to test it?... and can you post a graph with Ah or Wh instead of time on the X axis? that would help to compare!!

Doc

 

[dimitrib90]

Yesa batteries are probably a better battery looking from the graph. The only problem is that they cost an arm and a leg.

 

[Kurt]

Independent testing is always best.

Kurt

 

[Mr. Mik]

130U.2410F (24V10Ah) YESA LiFePo4 Battery Testing Result

1.Testing parameter:24V 10AH YESA Battery, Discharge rate 5C=50A.
2.Testing equipment:60V 200A testing cabinet, 30.4V 3A Charger, multimeter, thermometer.
3.Testing Condition: Indoor 25℃
4.Steps:
a.Select 8 pcs YESA YLH347094 LiFePo4 cell, assemble 24V 10Ah battery.
b.Charge the 24V 10Ah battery fully by the charger(30.4V/3A), then discharge it at the testing cabinet.
The discharge curve and battery is in the attachment .

I do not fully understand the graph you posted.

How come that there is Voltage as well as Current on the Y-axis?

In order to have a fixed relationship between voltage and current, the battery would have to have the same internal resistance throughout it's entire SOC range - or not?

 

[Doctorbass]

You charge at 30.4 wich correspond to 3.8V/cell... wich may deteriorate the cell cycle life...

I need to advice everyone about something important when conparing cell tests...
If anyone want to compare with the Headway 10Ah cell tests, you should wait for test of these Yesa cell when charged to 3.70V.. if they do it... otherwise it's not comparable

I charge that cell to 3.70V.. Yesa seems to charge to 3.8V.. that make a little difference..

Doc

 

[Mr. Mik]

Hi, Mik,

Please check the graph carefully.

The colour of axis nameplate also is meaningful. Maybe you ignore the blue line that shows the constant current 50037mA,

the Y-axis only shows the voltage, and X-axis is time , discharge current is constant 50037mA.

That's exactly what I missed, thanks!