Fast Charing of Lithium-Ion Battery Using CTCV Method

Abstract

If we examine the charging scheme of Lithium Ion Batteries, they use mostly an open-loop strategy. Normally the method used is Constant Current Constant Voltage method, in which the temperature has zero effect, only the values of Current and Voltage are varied by which the charging rate is controlled. This method is however slow and partially inefficient, we have used in our FYP the CTCV method defined as Constant Temperature Constant Voltage method. This method considers the temperature of the cell as a very important aspect. This proposed method uses a very simple Transfer Function with feed-forward support. The basic functionality is that the current for charging is altered dynamically with the increase in the temperature of the cell, which keeps in consideration the thermal environment of the battery too. With the application of our project, we have observed an overall 25% increasing in charging, as compared to the other method. Ensuring that the change in temperature of cell is smaller than 18%. Therefore this can easily solve the modern day issues where we have lesser time to charge our devices and use them for a longer period of time. Therefore, this ensures the faster charging of battery ensuring the battery long life as well.