How can I size capacity (at Ah) of starting batteries for diesel motor? I am looking for some analytic procedure (which includes some equation etc.) for the sizing of battery capacity, i.e. procedure which will lead me step by step to the necessary capacity (which is not to much excessive) of starting batteries.
My older collegues have chosen starting batteries for starting diesel motor on the basis of their experience, but without some analysis.
There are requirements from three sides that I have to take into consideration:
1.) Manufacturer of baterries define few typical values of each battery: Ah, CCA, MCA, RC (+ voltage).
2.) Manufacturer of starter motors define curves of correlation of starter torque, speed, current and terminal volts (there is a data sheet of starter that I have at diesel motor at latest project:
or (same motor)
3.) And there is requirement of classification society (our application are marine application): batteries have to provide 6 starting with min. 5 second (you can take 10 second) period of each starting.
If there is some web sites with this issues, please say. I googled, but didn't find nothing pragmatically.
I hope to your soon answer.