In order to reduce our dependance to fossil fuels and to reduce greenhouse gases in the field of transportation, new battery technologies rapidly emerge. Lithium-ion technology is very promising for its high energy and power density compared to traditional battery types such as NiCd, NiMH and Lead-Acid. To take advantage of the lithium-ion technology, the battery temperature and SOC must be supervised with a Battery Management System (BMS). The BMS needs a reliable electro-thermal model of the battery to supervise it properly.
Many battery modeling and parameters identification methods exist in the litterature. Often, these methods require proprietary information from the battery manufacturer or costly and complex experiments. To simplify the modeling of lithium-ion battery, a novel thermal model based on modified Shepherd battery model has been developped. This report addresses the experimental validation of this novel lithium-ion thermal model.
A LiFePO4 battery and a LiCoO2 cell have been tested. First, the thermal parameters of the battery and cells are identified experimentally and the electrical parameters are calculated from the manufacturers datasheets. A steady state validation with CC discharges and CC-CV charges at different ambient temperatures was carried out on the battery and cells. Then, a dynamic validation with pulsed discharges/charges and driving cycle discharges at different ambient temperatures was carried out on the battery.
Validation results are analysed and discussed. The Validation respects the predefined error constraints excepting certain types of validations.
Lupien-Bédard, A. (Author),
Dessaint (Supervisor) &
Fortin Blanchette (Co-supervisor),
23 May 2016Student thesis: Master's thesis › Master in Engineering: Electrical Engineering