## Lead acid battery charger circuit diagram 8��32,test car battery x55d23c,vector battery recondition battery - Plans On 2016

13.07.2014
The circuit given here is a current limited lead acid battery charger built around the famous variable voltage regulator IC LM 317. To setup the charging voltage, power ON  the charger and hook up a voltmeter across the output terminals and adjust R4 to make the voltmeter read 28V. I Have 36 volt 10 AH lithium battery, can I modif 24V lead acid battery charger circuit, to charger my 36 volt lithium battery?
Hello engr,in this your design.can i use it to charge two 12V,26AH lead acid battery connected in series?.if no,what is the implication?
Two 12 volts batteries of similar type and conditions can be charged up to a maximum of 7 AH only. Hi joe Two 12 volts batteries of similar type and conditions can be charged up to a maximum of 7 AH only.
Hello engr,in this your design.can i use it to charge two 12V,26AH lead acid battery connected in series.if no,what will be the implication?
Hello would you be kind enough to publish a 48v 5 to 10 amp lead acid battery charger circuit ? This charger can be used for single 24 volt 7 AH battery or 2nos 12 volts 7AH batteries in series. Hi Tran you can charge 24volt 1.3AH battery (hope dry means dry fit lead acid gel cell) also.
Thank you very much for the charger circuit, i would like to use this circuit for charging two lead acid (12v 150A X 2)battery, for inverter. Sorry, I can’t quite follow how the resistor R2 provides 700mA, can you explain how the calculation is done please? I am looking to make an in-car charging system for an electric mobility scooter – it uses a 24v 10Ah battery. 1) can I substitute a 12v step-up DC-DC converter for the transformer and bridge rectifier section of your circuit to give me the DC input to the regulator, and what output voltage would the converter be required to supply? 2) what if any of the components of the regulated charger section would need to be changed to provide the correct output current and voltage? I’m a big fan of your circuits,and I would like to ask about the possibility of modifying this circuit so we can control charging current (like a pot. Hi Gangadhar you can but ensure the output voltage is adjusted to 14.2 volts without load with pot R4.
To charge a battery from AC we need a step down transformer, rectifier, filtering circuit, regulator to maintain the constant voltage then we can give that voltage to the battery to charge it.

As seen in the DC voltage is given to the DC voltage regulator here we use LM317 which is a DC voltage regulator. The DC voltage is connected to the Vin of the LM317 in between we have connected the capacitors will be opened but if it had any AC noise it will remove it. The Vout of the LM317 is given to the battery which is to be charged, pin1Adjustment pin of the LM317 is connected to the transistor Q1, Resistor R1, R2, R5 which will help to adjust the regulator. The output of regulated voltage and current is controlled by the transistor Q1, resistor R1 and R2 and potentiometer R5.potentiometer which is used to set the charging current. To charge lead-acid batteries we can use this circuit that consist of a current-limited power supply and a flyback converter topology.
Isolation and voltage input range flexibility are provided by the flyback transformer, even at the battery voltage higher than supply voltage. BQ24105 Switch Mode Lead Acid Battery ChargerSwitch mode circuits can implement the lead acid battery charger with a more efficient. Sealed-Lead Acid Battery ChargerTo optimally control the charge and hold cycle for sealed lead acid battery, UC2906 series of battery charger controllers is used by all of the necessary circuitry. Very Simple Lead Acid Battery Charger with PB137 RegulatorThis is a Very Simple circuit for Lead Acid Battery Charger using PB137 Regulator. Traveler’s Cellphone Battery ChargerWhile traveling, charging of the mobile phone, cellphone battery is a big problem as power supply source is not generally accessible.
Power Path Management Battery ChargerPowering the system is required by many applications while charging the battery simultaneously.
Except for use as a normal Batter Charger, this circuit is perfect to ‘constant-charge’ a 12-Volt Lead-Acid Battery, like the one in your flight box, and keep it in optimum charged condition.
The above circuit is a precision voltage source, and contains a temperature sensor with a negative temperature coeficient.
This Battery Charger is centered around the LM350 integrated, 3-amp, adjustable stabilizer IC. The LM350’s ‘adjust’ pin will try to keep the voltage drop between its pin and the output pin at a constant value of 1.25V. Depending on what type of transistor you use for Q1, the pads on the circuit board may not fit exactly (in case of the BD140).
As per your requirement of 26 AH a power pack capable of maximum current limit of 7 amps (9 amps preferred) is required.
Pls I need your urgent assistance in responding to these questions to enable me modify this circuit to do something else.

I tried to insert a second BC547 as suggested (base of 2nd BC547 to base of 1st and emitter to the other emitter and collector to a led and a 2.7K resistor to C1 positive) to indicate full charge with no luck whatsoever! Pls can u send me the circuit diagram containing the charging indicator(green and red).pls send it to my email. Think if you have only DC voltage and charge the lead acid battery, we can do it by giving that DC voltage to a DC-DC voltage regulator and some extra circuitry before giving to the lead acid battery. The main advantages of Lead battery is it will dissipate very little energy (if energy dissipation is less it can work for long time with high efficiency),it has very low energy to weight ratio, it can deliver high current’s and very low cost.
MAX471 current sense amplifier is used to monitor the charging current by sensing the output. Meaning, whenever the surrounding or battery temperature increases the voltage will automatically decrease. Example, if your input voltage will be 24 volt, your C1 should be able to carry at least 50V. There is also a trickle charge mode circuitry which will help to reduce the current when the battery is fully charged. To detect if the value falls below the predetermined threshold or not, this circuit uses the output current monitor’s result that gives a feedback to a threshold detector. The bq24105 was originally designed to charge single-, two- or three-cell Li-polymer and Li-ion  battery packs.
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For LM317 there is no maximum voltage unless the difference between the input and output voltage should not exceed maximum differential voltage. When a lower voltage is applied for lower charging current, this circuit will switch the charger into trickle mode using the detection.
If the charge current the transistor will get off so the voltage regulator cannot be adjusted. Diode D1 prevents the reverse flow of current from the battery when charger is switched OFF or when mains power is not available. To prevent that sensor Q1 is warmed up by its own current draw, I recommend adding a cooling rib of sorts.