Method for acoustically checking operability of lithium-ion-battery cell utilized in motor vehicle, involves striking points of cell with tool, and detecting induced sound from points of cell, where detected sound is subjected to analysis

摘要

The method involves striking points (14a-14c) of a lithium-ion-battery cell (10) with a striking tool (12) i.e. hammer, during a measuring process, and detecting induced sound (16) from the points of the battery cell, where the detected induced sound is subjected to analysis that uses Fourier-transformation and/or wavelet-transformation. An amplitude image is assigned to the battery cell, where the amplitude image is subjected to an image analysis. The induced sound is detected by using a free-standing microphone (18), impact sound microphone, strain gauge or acceleration sensor.