Need Help! 6V Battery Charger Problem....

[technorachit]

Hi...I am Rachit....
I have a 6V/4.5 Ah Battery and i want to charge it..I have been searching the net since many months but I'm not getting any foolproof circuit which i can use..Can anyone suggest me a charger circuit?

awaiting your replies..
Thanks in advance

Rachit[/b]

 

[pranam77]

Hi...I am Rachit....I have a 6V/4.5 Ah Battery and i want to charge it..I have been searching the net since many months but I'm not getting any foolproof circuit which i can use..Can anyone suggest me a charger circuit?
awaiting your replies..Thanks in advance..Rachit[/b]

Use a 10 volt transformor, rectify, filter it and then use a LM317 TO220 package with heat sink, set the out put to 7.5 to 8volts. This will be your constant voltage battery charger for 6 volts 4.5ah battery. Cheers.

 

[technorachit]

Thanks for your reply, but i want a circuit with a overcharge protection

 

[dick_freebird]

If you want overcharge protection and have plenty of
time to charge it, you'd just design for something like
a C/10 rate (450mA) and that's your supply headroom
across a fat resistor (like a 9V wall-wart and maybe a 10ohm
resistor for 300mA-ish).

You want a fast charge that rolls off to a trickle, then you
have to be smarter.

 

[Audioguru]

This is an international forum. There are many different chemistries used in rechargeable batteries around the world. Maybe in your country only a lead-acid type is used.
Lead-acid, Ni-Cad, Ni-MH and Lithium.

You should tell us which type of battery you are using so we don't need to guess.

 

[flashtech]

What kind of battery if it's a Maintenance Free battery?

 

[Audioguru]

What kind of battery if it's a Maintenance Free battery?

A Ni-Cad, Ni-MH and Lithium battery are all "maintenance free".
Also is a lead-acid battery.

I think maybe your battery is a lead-acid one.

 

[technorachit]

I have a 6V/4.5 Ah SMF Lead acid battery...
The circuit which i've uploaded is download from https://www.electronicsforu.com/
This is a circuit is of a Low Power Emergency Light.
The LEDs in parallel glow with the help of the Lead-Acid battery...This circuit has an overcharge protection. But no indiaction after Charging is completed...Can u people tell me the changes to be done to get a visual indicataion...
Thanks and Regards.

Rachit..

 

[Magnetelectronics]

Hi Rachit,
If the circuit has overcharge protection, then why do you want indication?
just visit www.innovativepeoplesearch.ws

Regards,
kjm