I have a small renewable energy source and I want to use a charger circuit to harness my produced energy and store it in a battery. first of all does anyone have some good recommendations as to what type of battery chemistry is best used for storage these days. weather it be NI-mh, NI-cd, lithium Ion or lead acid etc etc. and second I have been looking at some of Ti's charger circuit chips for a lead acid battery mainly because I happen to have a few extra lead acid car batteries around the house.
I have been looking at the UC2909 chip and I have been having a lot of trouble trying to figure out how to design for the max charging current. I believe that the specs say it has a max charge current greater than 2 Amps. can anyone help me out. Rs = 350mv/max current load. is the max current load what ever the device is that I have connected to the batteries output. and can someone explain in a little more detail the iBulk equation and where the (setting of RG1 and RG2) comes into play. I understand how to formulate them I just dont understand where they come into play with bulk current equation. see attached pages of the UC2909 chip.