Sunday, September 13, 2015

Circuit Schematic LiPo Battery Charger using LM324 IC

Eltronicschool. - There are many circuit schematic designed for battery charger application. In here we will give you specific circuit schematic of battery charger for LiPo battery using LM324 IC like in Figure 1 below. (You also can read: Circuit Schematic 12V LDO Solar Charge Controller using MOSFET)

Circuit schematic

Component Parts
  1. IC1 = 7909 
  2. IC2 = LM324
  3. Resistors
  4. LED
  5. D1 = IN4148
  6. Q1 = 2N2222
Description

Circuit schematic like in Figure 1 above is Circuit Schematic LiPo Battery Charger using LM324 IC. According Circuitstoday site describe that Li-Po battery or Lithium-Polymer battery is a rechargeable battery based on the Lithium-ion technology enclosed in a flexible pouch. This soft, flexible pouch makes them very light with a compromise in mechanical strength. Li-Po batteries are widely used in applications where weight is a critical factor. The common applications are radio controlled model flight, RC toys, hand held devices etc.

The Lithium Polymer battery is evolved from the Lithium Metal Batteries.The main difference is that instead of using Lithium salt electrolyte binded in organic solvents like  Ethylene carbonate, Di Methyl Carbonate Di Ethyl Carbonate , Li-Po batteries use polymer electrolytes like Poly Ethylene Oxide, Poly Methyl Methacrylate, Poly Acrilonitrile etc.   The output voltage of Li-Po battery depends up on the technology used behind it. It is 2.7-3.0 V (discharged) to  4.20-4.35 V( charged) for cells based on Lithium Metal Oxides and it is 1.8-2.0 V (discharged) to 3.6-3.8 V (charged) for cells based on  Lithium Iron Phosphate. The charging current is usually 1/5 of the mAH rating of the battery.

Like other Lithium batteries the Li-Po batteries are also prone to problems related with over charging, deep discharging, over temperature, short circuit etc. Any of these problem may result in permanent damage to the battery or even explosion. In order to avoid such problems, great care must be given while designing LiPo battery charger circuits.

Please read more about Circuit Schematic LiPo Battery Charger using LM324 IC using link here.


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