Design and implementation of limit charge function circuit for 48V 100Ah TLC Li-ion battery

The objective of this project is to analyse the behaviour of two different Li-ion TLC prototype batteries, with a specific focus on limit charge function. The limit charge function is designed to regulate the charging current when it exceeds a threshold that the battery is not able to safely handle. This regulation ensures the continuation of the charging process without causing damage or triggering the Battery Management System (BMS) to disconnect the charging MOSFETs. While one of the batteries is equipped with this protective feature, the other does not present such functionality. This research aims to evaluate the performance disparities between the two prototypes and subsequently design and develop a solution to integrate the limit charge feature into the second battery. This is made by simulating system behaviour with Simulink and LTSpice and, afterwards, limit charge function is implemented on a prototype board to evaluate its real behaviour. In conclusion, a PCB prototype board is designed and implemented to be introduced to the battery pack.