Serious lead-acid battery charger

[Orefat]

Hello everybody!

I'm planning to build a serious 220V 50Hz to 28V 15A(min.) smart charger for lead-acid batteries.
And, to be frank, I have no idea where to start. I would appreciate any suggestions on this topic.
Smart term in this case means that the voltage will fluctuate, from 28V (which will be constant voltage potential if battery is good) to 32V (if battery is "dead" and the charger will rise voltage to this point to try to revive the battery).
The current source and drivers should be SMPS but, as mentioned, with approach to soar the voltage.
So, what PSU type you recommend, which SMPS controllers, flyback, transformers, MOSFETs, IGBTs, maybe a MCU based psu?
Thanks in advance.

 

[davenn]

didn't know they made 28V lead acid batteries ??

 

[Orefat]

didn't know they made 28V lead acid batteries ??

Batteries are 24V.

 

[Martaine2005]

Batteries are 24V.

Do you mean two 12v in series?
Either way, this project would be far too complex if you don't know where to start.
Better to buy one.

Martin

 

[dorke]

Do you mean two 12v in series?
Either way, this project would be far too complex if you don't know where to start.
Better to buy one.

Martin

Probably a large truck battery.

@Orefat ,
It isn't the simplest of projects out there,
why won't you use a commercial one?

 

[Orefat]

I bought a commercial one, but making one is such a challenge, isn't it?
Btw, the batteries are from Karcher battery-powered scrubber drier (1.2V per cell).

 

[BobK]

I have never heard of lead acid batteries with1.2V per cell, they are normally 2.0V per cell. This sounds more like NiCad or NiMH.

Bob

 

[Colin Mitchell]

"smart charger for lead-acid batteries" needs a smart design-engineer with 4 years experience.