Lithium batteries or simply LIB have revolutionized the electronic world with its discovery and advancement. Their increasing popularity can be seen among home-based electronic devices, electronic vehicles and even at military and aerospace applications. A lithium battery is a successful replacement to the large and heavy lead-acid batteries which were harmful to the environment. The concept behind the Lithium batteries is quite simple but still, it took decades of research to develop its technology. Today, featuring from cylindrical cells to the big batteries all are formulated with Lithium ions.
Manufacturing Process of Lithium batteries
The anode and cathode in the Lithium batteries are of the same form and act as a current collector and conducts the current in and out of the cell. The material of anode is Carbon based and the cathode is a Lithium metal oxide. They are delivered as a black powder and are stored with great care.
Now the metal electrode foils are delivered in large reels nearly 500mm wide. Here copper is used for anode and aluminium for the cathode and these reels are carefully mounted on the coating machine. Here the foil is unreeled and fed to the machine through precision rollers. The thickness of the coating layers must be set to allow the energy storage per unit area of the anode and cathode electrodes to be matched.
From the coater, the coated foil is fed directly into a long drying oven in order to bake the electrode material onto the foil and is further re-reeled. The foils are cut into desired lengths without burrs which can lead to internal short circuits.