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Wednesday, January 27, 2016

How to Build LiPo Battery Charger using 7809 and LM324 IC

ElcoHow. - There are many battery charger circuit schematic that design to give best result charging. One of the electronic circuit battery charger is like in Figure 1 below that suitable to charge LiPo battery. The main components are used in this circuit are volatge regulated IC 7809 and LM324 IC. In here, beside we will give you circuit of Battery Charger using 7809 and LM324 IC, we also will give you global description about this circuit and also skill needed and other.

Electronic Circuit
Component List
  1. LM324 IC
  2. 7809 IC
  3. LED
  4. Transistor 2N2222
  5. Resistors
  6. LiPo Cell Battery 3.7/360mAH
Description

Electronic circuit like in Figure 1 above is Battery Charger using 7809 and LM324 IC circuit. According Circuitstoday site that published 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.


7809 Pin Connection
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.
Skill

To build LiPo Battery Charger using 7809 and LM324 IC, you need some skill as follow:
  1. Basic soldering.
  2. Read a basic schematic.
  3. Assembling electronic component
  4. Design PCB layout
  5. Testing voltage and current
Tools and Material
LM324 Pin Connection

In this project, you must prepare some tools and material that used as the supporting to build LiPo Battery Charger using 7809 and LM324 IC as follow:
  1. Tools: soldering iron, cutter, multitester, and Project Board.
  2. Material: Tin, PCB
Software

When you want to realize this LiPo Battery Charger using 7809 and LM324 IC circuit into real application, you can build it as like design PCB layout using good software as like: PCB Wizard. 
How to do?

For more information about this project step-by-step you can follow this project of How to Build LiPo Battery Charger using 7809 and LM324 IC you can read below.
  1. Prepare electronic component listed, material and tools needed.
  2. Firstly you can try this circuit using project board tool.
  3. After you surely with this circuit work properly, now you can begin with design PCB using PCB Wizard.
  4. After designed, now you can make the PCB layout to put these components. You can make PCB by your self or order it according your PCB layout design.
  5. Put all component to the PCB layout and soldering all component.
  6. Now you can test, input and output voltage and current from this circuit. Please read caution below.
Caution
  • Do not put all semiconductor component like IC, Diode, reverse.
  • You also can choose other semiconductor component like LM324 IC with similarity.
  • Please use heat sink for 7809 IC.


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