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Anonymous Poster

Charger Circuit for 12v Battery Lead Acid

10/11/2010 8:18 AM

hi all, could u all tell me, what the circuit that i must choose to charge the battery, and when the battery is fully charge, (lets say 12V), it will cut off automatically, i hve no idea about that....
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Anonymous Poster
#1

Re: Charger Circuit for 12v Battery Lead Acid

10/11/2010 9:13 AM

To charge a battery normally we should take a potential equal to the battery (In your case 12V) and 1A as ideal current.(40AH/20=2A). Inorder to step down the standard AC supply use single phase stepdown transformer, bridge rectifier circuit (a four diode arrangement with standard capacity) and a series resistance/variac to limit the current. You have to find out values of each component for your purpose.
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TonyS
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#2

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 12:34 AM

Charging voltage is 13.8.
It's quicker, easier and cheaper to go to your local car accessory shop and buy one.

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hithuanand
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#3

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 3:27 AM

indicator for 12V charger.
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hithuanand
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#4
In reply to #3

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 3:32 AM

the charger circuit.
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hithuanand
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#5
In reply to #4

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 3:57 AM

We can remove that parallel voltage level indicator IC1(A,B,C,D),resistors,LED,zenor diode to make it simple.As they are parallel they don't change anything.

all we need is a transformer(1ph,230/12V,2A ),IN5402 diodes-4, 2200µ-25V capacitor to filter the harmonics.

see standard fuse wire for 2.5A

around RS.120 with voltage level indicator in the circuit.

all the best.
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Anonymous Poster
#6
In reply to #3

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 9:03 AM

thanks for the circuit, but it is cut off when it reach the fully charge???
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hithuanand
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#7
In reply to #6

Re: Charger Circuit for 12v Battery Lead Acid

10/12/2010 9:55 AM

To cut off observe the indicator diagram i have given.you can see a diode with transitor and a relay on top right of circuit. When the battery is fully charged the transistor comes under saturation via LED to activate the relay from NC to NO hence cutting the 1 phase supply to charging circuit. Cheers
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PWSlack
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#8

Re: Charger Circuit for 12v Battery Lead Acid

02/21/2024 3:33 AM

Battery chargers are widely available commercially. There is no need to reinvent the proverbial wheel; just buy one.

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