THERMAL MODELING OF A BATTERY PACKAGE USED ON ROAD VEHICLE POWERTRAIN

摘要

Recent years bring new European Union regulations concerning harmful emissions for road vehicles. The hybrid electric and electric mobility is a technology revolution for the automotive industry. In response to the stringent regulations and requirements enforced, vehicle manufacturers are developing new strategies, using hybrid electric or electric powertrain solutions. In order to obtain the goal of using alternative powertrain solutions, it is important to integrate from the early beginning different devices and to optimize their behavior. However, with a minimum of one electric energy storage package represented as the battery package, a hybrid electric powertrain triggers more concerns surrounding energy flows. During operation, there are energy losses caused by heat generation. Generated heat, emphasized as losses, is having a negative effect on the battery package efficiency. Apart from the functional behavior of the battery package, which is the deliver and to store electrical energy, due to internal losses it also has a thermal behavior, which needs to be taken into account Thereby this paper aims to present the thermal behavior of a battery package in order to study its' energy flows and to determine its' efficiency as part of the powertrain. Based on thermal resistances, a thermal network was developed to compute internal losses for different parts of the battery package. Using simulation, both the battery package and its thermal model, were integrated in a mock-up virtual hybrid electric vehicle to study its behavior during a predefined cycle.