چكيده به لاتين
The continues vibration of car batteries is an undeniable cause, if not absorbed properly it will cause leakage, braking, electrode layer failure, capacity decrease, increase in DC resistance, malfunction in charging and even burning. This circumstance can be even more difficult for battery packs, because the cells increase and the argument about cell coordination takes place. If one cell malfunctions, it will negatively affect other cells.
In this thesis battery introduction, kinds, functionality, market and the importance of it in car industry was argued. Then the effective parameters and battery basic theories were discussed and the pointed sources with their standards were analyzed. In continuation, with modeling and the pressure test of lithium cells in Abaqus software, the mechanical behavior was calculated. By modeling the battery pack and cells, their natural frequency was calculated that it showed 800 Hz for cell and below 40 Hz for battery pack. The fixing and redesigning of the vibrating machine, located in automotive faculty of IUST was attempted which first was simulated by Solidworks software and the specific vibration parameters were calculated in Abaqus software, and in progress the vibrating machine was repaired. Then the procedure of the experimental vibration test was acquired by regarding the standard ECE R-100 in which the vibrations assigning to the batteries were only analyzed vertically. In continuation, the needed tools for the vibration test such as element current consumer, logger for simultaneously logging voltage and current was equipped and made. Then by the help of image processing, the way of movement and vibration of the machine was calculated and analyzed. In the end, the experimental vibration test of battery pack was carried on. The result of the test showed that vibrations had no specific effect on the battery pack in short periods of time.
