Smart battery charger?

[Netlist]

I’m looking for a schematic of a device similar to this AccuMate .
The goal is to build something that has the same features.
I found a schematic here but I don’t know if it would be good for what I need the AccuMate. I want to keep the battery of a motorhome properly charged during winter period.
Maybe going DIY here is not worth the effort looking at the prices of a ready build one.

Any opinions, schematics?

/Hugo

 

[Matttcattt]

thats my thread.

i wanted to build something similar, as you do, but i descided it would be simpler and cheaper to buy one rather than to build one, even if i lose out on the pleasure of building one.

thats my advice. sorry i cant help.

 

[Netlist]

thats my advice. sorry i cant help.

Until someone else comes up with other advice, this is a great help; You've been there, done that. I consider that as the best.

Thanks Matttcattt

/Hugo

 

[wooferhound]

I would use one of those little solar panel chargers that are made to do just what you are talking about. No worry about running electrical wiring and does not add to the electric bill . . .

 

[Netlist]

Thanks Woof,
I like the idea except the charger will stand in a dark garage with no sunlight at all.
I found an interesting website with plenty of links.
http://www.uuhome.de/william.darden/batlinks.htm#solar
I let you know where I end.

/Hugo

 

[Pjotr]

Hi,

For charging and maintaining lead-acid batteries any constant voltage current limited DC supply will do (within battery limits). But the trickle voltage is somewhat temperature dependent. Here a rather old app. note for a battery charger for more info:

http://focus.ti.com/lit/an/slua115/slua115.pdf
http://focus.ti.com/lit/ds/slus186b/slus186b.pdf

also look here for more app. notes:

http://focus.ti.com/docs/prod/folders/print/uc2906.html#applicationnotes

Cheers

 

[Netlist]

Thanks Pjotr,
Now I have to find some time to read all that stuff.
Looks interesting at first view.

/Hugo