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LABCO PS243 - Charging the battery

B

benitos

Jan 1, 1970
0
Hi ,

Having this power supply to provide 12V (with a back up battery).

The battery seems to be connected in // with the 12VDC output.

It doesn't seem to charge it. Do I need more than 12V to charge it ?
 
S

Sjouke Burry

Jan 1, 1970
0
Hi ,

Having this power supply to provide 12V (with a back up battery).

The battery seems to be connected in // with the 12VDC output.

It doesn't seem to charge it. Do I need more than 12V to charge it ?

It will charge to maybe 30 percent, higher if the 12v supply gives
a bit more then 12 volt.
 
Hi ,

Having this power supply to provide 12V (with a back up battery).

The battery seems to be connected in // with the 12VDC output.

It doesn't seem to charge it. Do I need more than 12V to charge it ?
Yes. A 12V lead acid battery is typically charged at 14.2 to 14.4
volts.

PlainBill
 
B

benitos

Jan 1, 1970
0
Le mercredi 5 septembre 2012 19:40:03 UTC-4, (inconnu) a écrit :Max I can go is 13.8V .

Is it OK ?

Also , because it's connected in // with the output , it's Ok if there is voltage across the battery all the time ?
 
M

Mark Zacharias

Jan 1, 1970
0
tm said:
But you better make sure the supply does not drag the battery down when
power is removed.

I think I would at least have a resistor between them. There's guys around
here that know a lot more than I about the care and feeding of batteries,
but it is my belief that some resistance in series will help prevent
overcharging. Perhaps as little as 10 ohms or so.

Mark Z.
 
T

tm

Jan 1, 1970
0
Mark Zacharias said:
I think I would at least have a resistor between them. There's guys around
here that know a lot more than I about the care and feeding of batteries,
but it is my belief that some resistance in series will help prevent
overcharging. Perhaps as little as 10 ohms or so.

Mark Z.

No, you do not want any current to feed back into the unpowered supply. Use
a good quality schottky diode of to appropriate current rating. Also,
consider a fuse to avoid a fire. Lead acid batteries like to be charged from
a constant voltage, current limited power supply.
 
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