Battery Discharge Test

[changeabilities]

Hi guys,
I need your help about battery discharge tests. We completed the test but i have some question marks in my head. Batteries are for 30 min but test was completed at 55 minutes. When i calculate the capacity it is more than 100 percent. Do you think that is make sense?

[GrayTard]

Hi guys,
I need your help about battery discharge tests. We completed the test but i have some question marks in my head. Batteries are for 30 min but test was completed at 55 minutes. When i calculate the capacity it is more than 100 percent. Do you think that is make sense?

The slower a battery is discharged the less losses. Look at the performance table in the sbs link below.

https://www.sbsbattery.com/PDFs/StationaryCatalogWeb.pdf

55 min is strange though. That would be fast. Typical is about 8 hrs dishcharge rate to hit the nominal A*hr.

What kind of batteries?

[joaogemal]

Hi guys,
I need your help about battery discharge tests. We completed the test but i have some question marks in my head. Batteries are for 30 min but test was completed at 55 minutes. When i calculate the capacity it is more than 100 percent. Do you think that is make sense?

Hi there,
If you follow all procedures for your discharge test, among them, pre-equalization, resting time after this equalization, constant current during all test, correction factor applied (if necessary) that is your result, and you have a battery with some extra capacity. In short, done correctly it make sense.