Design Of A 48V 13S Battery Management System For Enhanced Electric Vehicle Performance

State of Charge (SOC) estimation plays a vital role in electrical vehicles’ performance. With the help of estimated SOC the driving range, State of Health (SOH), energy and power limits can be determined. The conventional way of estimating SOC doesn’t include the sensor and process noise measurements. In this light, the model and data-driven- based methods served better accuracy in estimating SOC considering all the effects. Besides, the primary step will be the modeling of the battery with consideration of all the behavioral effects of the battery. Further, using MATLAB Simulink, the model is developed and executed under New European Drive Cycle (NEDC). The performance of the battery is analyzed using the coulomb counting method. Later the analysis can be extended in the direction of Kalman filter algorithms

I. Introduction

The era of electric vehicles starts in the late 19th century. The electric vehicle cost is high, the range is less and speed is low in the formative years of the electric vehicle technology. But there is a huge demand for electric vehicles in public transport such as trams and electric wagons etc. But because of the above reasons, electric vehicles got rejected in terms of individual transport. At the same time invention of gasoline vehicles had taken place. Conventional gasoline vehicles are cheap when compared to that electric vehicles and the range of the gasoline vehicle is higher. Fuel refilling stations add an advantage to conventional gasoline-electric vehicles. This thesis gives an understanding of what electric vehicles are and how they are different from conventional gasoline vehicles. Gasoline vehicles will run by using non- renewable energy recourses such as petrol, diesel, natural gas, etc. on the other hand electric vehicles will run with electricity that is coming from the battery [1]-[3]. So, if we compare what is the difference between the conventional gasoline vehicle and the electric vehicle they differ in the following ways the first comparison goes with the engine and engine control. Engine control actually means that the kind of fuel that goes inside the engine of the vehicle also deals with the accelerator and breaks. But electric vehicles re-place them with motor and motor control. Then comes the fuel and fuel tank [4]. In gasoline vehicles, we are concerned about the fuel tank and in electric vehicles, we replace the fuel with the battery. So we can clearly understand that battery is the fuel in, an electric vehicle. The cost of the battery is high and due to this cost of an electric vehicle is high. The cost of the battery is high to date. But day by day battery chemistries and material science are getting improved. This will definitely reduce the cost of the battery. But as of now, the cost of the battery is still high [13]. So conserving the battery is very much important in electric vehicle technology. To conserve the battery we need to estimate the state of charge (SOC) accurately.