The most significant component of an electric car is the battery, which acts as the major source of energy. The lithium-ion (Li-ion) battery is the greatest of all battery types and cells because of its remarkable features and performance. To maintain optimal performance, it is vital to keep an eye on the battery's parameters. The BMS is responsible for controlling the battery voltage, current, temperature, and calculating the state of charge. This study paper discusses several unique techniques for optimal battery management. This paper describes the development of a Battery Management System using several algorithms in MATLAB Simulink. The BMS model design in Simulink helps us to learn from the varied states of the battery pack. With this design, the BMS model can be treated as the basis of all the development activities, be it verification and validation, code building for real-time simulation or physical implementation. Different methods have been simulated in this paper using MATLAB Simulink. Analysis of the different waveforms has been done in detail which shows how optimal management of voltage, current and state of charge of Li-ion battery plays a very important role in an electric car.