Only a few recent studies investigated the effect of vibrations on the degradation and fatigue of battery cell materials as well as the effect of vibrations on the battery pack structure.
As Li-ion batteries become more common, research is needed to determine the effect of standard vibration and shock tests as well as that of long-term vibration on battery cells. Accordingly, studies on the effect of vibrations and shocks on Li-ion battery cells have been recently conducted.
In other words, there are good reasons to believe it is vibration which leads to an increase in the internal resistance. Therefore, hypothesis testing can be used to explain the effect of the vibration on the internal resistance of the battery in a statistically significant way.
In summary, while studies above have identified the effects of the vibration on the mechanical structure inside the lithium-ion cells, it is ambiguous whether the vibration had a significant effect on the electrical performance of lithium-ion cells.
In particular, mechanical vibrations and infrequent shock loads affect all parts of a battery including its smallest energy storing part, the accumulator cell, or short cell. Mechanical stress on cell level may cause market durability failures in the long-term and, especially for lithium-ion cells, these failures might pose a safety risk.
This study investigates the alterations in the electrochemical performance of batteries subjected to vibration at different frequencies and the changes in cyclic batteries after vibration. The degradation mechanism of the battery during vibration and cycling is revealed through electrochemical characterization and post-mortem analysis.