Tuesday, October 8, 2013

24V Lead Acid Battery Charger Electronic Circuit Schematic using IC LM317

Eltronicschool. - When you want to charge your Lead Acid Battery with voltage 24 volt, we think you must need re-charger device that can charge your battery. In here we will show you simple electronic circuit schematic that used to 24V lead acid battery using IC LM317 that we take from CircuitTodays blog. So we thank to this blog.

Electronic Circuit Schematic

Figure 1. 24V Lead Acid Battery Charger Circuit (CircuitsToday)

Component List

  1. T1 = Transformer 0 - 35 V
  2. D1 = Bridge Diodes 3A
  3. C1 = 2200uF/50V
  4. IC1 = LM317
  5. Q1 = BC547
  6. R1 = 100
  7. R2 = 0.85 ohm / 2W
  8. R3 = 220
  9. R4 = VR 10K
  10. C2 = 100uF/50V
  11. D2 = IN5003

Circuit Description

This lead acid battery charger circuit is designed in response to a request from Mr.Devdas .C. His requirement was a circuit to charge two 12V/7AH lead acid batteries in series.Anyway he did not mentioned the no of cells per  each 12V battery. The no of cells/battery is also an important parameter and here I designed the circuit assuming  each 12V battery containing 6 cells. 

When two batteries are connected in series, the voltage will add up and the current capacity remains same. So two 12V/7AH batteries connected in series can be considered as a 24V/7AH battery. The circuit given here is a current limited lead acid battery charger built around the famous variable voltage regulator IC LM 317. 

The charging current depends on the value of resistor R2 and here it is set to be 700mA. Resistor R3 and POT R4 determines the charging voltage. Transformer T1 steps down the mains voltage and bridge D1 does the job of rectification. C1 is the filter capacitor. Diode D1 prevents the reverse flow of current from the battery when charger is switched OFF or when mains power is not available. (Source:CircuitsToday)

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