A combined Li-ion & lead-acid battery system for start-stop application: potential & realization
Year: 2011
Type: dissertation
Abstract: The aim of this master thesis is to investigate the possibility of using lithium-ion batteries as a second battery instead of lead-acid batteries \nfor the start-stop application in vehicles. To achieve the specified target, the following steps are explored: investigation of the technology market, \nchoice of relevant sizing of the battery, development of charge algorithms for the battery system, creation of an electric simulation model with Simulink, \ndevelopment of a prototype for installation in car and finally verification of the new battery model in a vehicle. The battery which is chosen is a Li-ion \nbattery with a voltage of 16.6V and a capacity of 30Ah due to the test-rig requirements and availability. Before implementation in the vehicle, tests are performed \non the battery pack and the combined system. The controller system for charging and discharging is created in Simulink. Through several experiments, the working \nvoltage range of the Li-ion battery pack was defined from 14.8V to 14.2V. In addition, a verification of this solution has been done in a real vehicle. Moreover, \ncomparing the experimental results with our literature study, a new type of lithium-ion battery chemistry, which matches the characteristics required in this work is \ninvestigated: a LiFePO4 cathode based battery.
Authors: Heza Taha Mahmoud, Lishan Xu
Language: English
Subfield: Automotive Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W48346267