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

EDAboard.com Forum Index -> Analog Circuit Design -> Need Help! 6V Battery Charger Problem....

Author

Message

technorachit

Joined: 03 Sep 2009
Posts: 13
Location: India

05 Oct 2009 16:09 Need Help! 6V Battery Charger Problem....

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

Joined: 22 Apr 2008
Posts: 1071
Helped: 93
Location: Mangalore(India)

05 Oct 2009 16:14 Re: Need Help! 6V Battery Charger Problem....

technorachit wrote:

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

Joined: 03 Sep 2009
Posts: 13
Location: India

05 Oct 2009 16:17 Re: Need Help! 6V Battery Charger Problem....

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

dick_freebird

Joined: 04 Mar 2008
Posts: 307
Helped: 45
Location: USA

05 Oct 2009 19:42 Need Help! 6V Battery Charger Problem....

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

Joined: 19 Jan 2008
Posts: 1144
Helped: 93
Location: Toronto area of Canada

05 Oct 2009 21:35 Need Help! 6V Battery Charger Problem....

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

Joined: 04 Oct 2009
Posts: 3
Location: indonesia

06 Oct 2009 3:40 Need Help! 6V Battery Charger Problem....

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

Audioguru

Joined: 19 Jan 2008
Posts: 1144
Helped: 93
Location: Toronto area of Canada

06 Oct 2009 3:52 Re: Need Help! 6V Battery Charger Problem....

flashtech wrote:

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.

Google
AdSense
Google Adsense

06 Oct 2009 3:52 Ads

technorachit

Joined: 03 Sep 2009
Posts: 13
Location: India

06 Oct 2009 8:33 Re: Need Help! 6V Battery Charger Problem....

I have a 6V/4.5 Ah SMF Lead acid battery...
The circuit which i've uploaded is download from http://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.. Crying or Very sad