Lithium-ion batteries are another popular type of batteries that are used in the Uninterruptible Power Supply (UPS) designs. These batteries are commonly used in portable electronic devices. These are low maintenance batteries having high energy density, small size and light weight which makes them suitable for use in most of the portable devices.
But, due to high energy density in comparison to the weight and volume of the Li-ion Battery, there are also some safety concerns while charging the Li-ion batteries. Before designing a charger circuit for these batteries, let us first understand charging methods and topologies involved in charging Li-ion batteries. Also, precautions required in handling, storing and disposing of these batteries are must to know.
Fig. 1: Representational Image of a 12V Lithium Ion Battery
Charging Li-ion Batteries
Fig. 2: Graphical Presentation Showing Charging of Lithium IOn Battery
• Trickle state –
• Constant Current State (CC state) –
• Constant voltage State (CV state) –
1. Linear Regulator –
2. Switching regulators –
Maintenance of Li-ion Batteries and charging and discharging standards of Li-ion Batteries