Can't agree on this point. Panasonic e.g. suggests 13.6 -13.8V for trickle charge and 14.5 - 14.9 V for time limited constant current/constant voltage charge.The important thing is to prevent your 12V battery from being exposed to greater than 12.8 V.
Can't agree on this point. Panasonic e.g. suggests 13.6 -13.8V for trickle charge and 14.5 - 14.9 V for time limited constant current/constant voltage charge.
12.8 V won't achieve full charging and may have a negative impact on battery life time.
thanks friend ,
BradtheRad, your idea is good but there is a problem, in this method battery and main power are parallel always and it is not good for battery and harmful for battery (is not it?) because perpetual current flow on battery, in my idea (Doc1.pdf) battery is cutting off.
but i must say a 10ohm series resister is need (that is correct).
can we use SCR or other power switches?
in my design it is not important (uninterrupted power or lose power for a fraction of a second) uninterrupted power is good i think.I was not sure whether you needed uninterrupted power when power goes out, or whether it's okay for your circuit to lose power for a fraction of a second.
Hi,hi friends
I design a circuit that need work with main power and backup battery, when main power disconnected i need backup battery supply my circuit automatically. my battery is 12V and main power is 13.8V and i need when return main power battery charging started and after raise it's voltage to 12V battery charge stop.
my battery is Sealed Lead Acid.
thank you.
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