Hi everyone, I'm new to the board!
I've come asking a general question about lead acid battery charging. I did a little research on the net and found there's a common 3-stage algorithm to charge lead acid batteries: Bulk charge (constant current), Absorption charge (constant voltage) and Float charge (LOWER constant voltage).
The diagram on the second page of this pdf shows the general algorithm graphically: http://www.manson-power.ru/files/SBC_21101520_2007_eng.pdf
My issue is with the last of these 3 stages. If you put a voltage lower than the battery voltage across its terminals, then surely you don't get an increase in battery charge? If there isn't a diode on the output of a charging circuit I would have thought if anything, that you'd get a large reverse current.
Can someone please explain how this works? I used to think I understood electronics..
I've come asking a general question about lead acid battery charging. I did a little research on the net and found there's a common 3-stage algorithm to charge lead acid batteries: Bulk charge (constant current), Absorption charge (constant voltage) and Float charge (LOWER constant voltage).
The diagram on the second page of this pdf shows the general algorithm graphically: http://www.manson-power.ru/files/SBC_21101520_2007_eng.pdf
My issue is with the last of these 3 stages. If you put a voltage lower than the battery voltage across its terminals, then surely you don't get an increase in battery charge? If there isn't a diode on the output of a charging circuit I would have thought if anything, that you'd get a large reverse current.
Can someone please explain how this works? I used to think I understood electronics..