A lithium battery charger is used to charge lithium batteries commonly found in hand held devices and laptop computers. These batteries have changed the way we use handheld devices due to their increased lifespan. In addition to this, since lithium batteries can store more charge on a smaller mass, the weight of the handheld device has also decreased significantly. The article below will guide you through building a lithium charger that can be used while you’re on the go.
Tools and Materials Needed
- PCB circuit board of the appropriate type
- Related components (after consulting a professional electrician)
- A circuit diagram
- A lithium charger controller chip
- Soldering gun
- Solder wire
- Working table
Step 1 – Take Necessary Precautions
Since you will be using a soldering gun to solder minute components to the PCB circuit board, it is recommend that you proceed with caution. The soldering gun is a dangerous tool that can cause major burns if not used properly. You should read all the safety manuals that came with the device to ensure safety and control over the equipment. Handle the components with care and make sure that you do not bend any one of the numerous connector pins that are a part of their design. Work on a stable, well-lit working table and keep a magnifying glass nearby so that you can connect all components accurately and efficiently.
Step 2 – Prepping the Circuit Board
Circuit boards are plates on to which the electrical components are attached. They are manufactured by etching tin coating copper plates after a circuit pattern has been drawn on them. A step-by-step rendition on how to make a circuit board does not fall in the scope of this article. It is recommended that you purchase a ready made circuit board after consulting a professional electrician. You will need to choose a board with a design layout that will function as a lithium battery charger circuit.
Step 3 – Purchasing the Components
While at the local electric store purchase a lithium charger controller chip that suits the voltage rating of the battery and the power source that you will be using. In addition to this chip, your charger will also require other components like transistors and resistors to work. Consult with the Internet and an electrician and make a circuit diagram before proceeding to soldering the components in place. In addition to this, you will need to be aware of the voltage ratings of the components and their compatibility with the lithium batteries.
Step 4 – Soldering the Components in Place
Identify the location for each component on the PCB circuit board by following a circuit diagram. Insert the component, for instance a resistor, in to the holes in the circuit board and attach using a soldering gun and soldering wire. Make sure that the amount of the solder melted is just sufficient to cover each contact. Do not flood the board with melted solder so as to avoid damage to the components and to the batteries being charged.
Step 5 – Finishing Up
Connect the input and output cables to the PCB circuit board and use to charge your lithium battery. Later on test the lithium batteries to ensure they have been charged and that the charger is working properly.