Testing of Technical Indicators of Accumulators by Means of Complex Computer Model of EV

Abstract

The accumulators utilized in electric transport differ from those of other applications. Their main features are high capacity, minimum size and weight, and reasonable price. There is extensive research and investment worldwide to improve battery technology.
The aim of the work is to create a mathematical model of an electric vehicle that can capture the vehicle's speed curve as a data input to generate the consumed and recovered battery current, which can allow the battery parameters to be analysed and conclude whether the vehicle can perform the trip around the city route with selected battery parameters. This model is being developed as a tool that could simplify and speed up the necessary calculations for battery parameter selection in electric transport based on manufacturers' technical data. The model can help to examine individual sections of the route and their impact on the battery.

Perhaps one of the most important parts of an electric transport is battery. In some of the cases it takes a lot of time and work to choose a suitable one. For this task completing, a simplified electric transport mathematical model gives an opportunity to check if the selected battery can be used in the city's electrical public transport. The input parameters of the model are the parameters of electrical transport. With this aim the electric vehicle battery types and criteria are examined. A simulation of the most popular types of batteries has been performed for two routes of Latvian city Jelgava buses in order to determine whether the chosen batteries can provide the necessary bus movement. The mathematical model was developed in the MATLAB/Simulink software and using SimPowerSystems library. A GPS mobile application SpeedTracker was used for data logging.