Study of Ni-Zn battery by coupling strain gauge measurements and acoustic emission

TL;DR

This study combines strain gauge and acoustic emission techniques to analyze the mechanical behavior of Ni-Zn batteries during operation, especially during overcharge, providing insights for battery monitoring and management.

Contribution

It introduces a combined non-destructive approach using strain gauges and acoustic emission to study battery internal stresses during operation, particularly overcharge conditions.

Findings

Mechanical stress release during overcharge detected

Complementary data from strain gauge and acoustic emission

Potential for improved battery health monitoring

Abstract

Two different non-destructive techniques of characterization were coupled to study the mechanical behavior of materials inside a battery during operation: measurement of the deformation of a battery casing by strain gauge and acoustic emission due to the release of mechanical stress inside the battery materials. Experiments were conducted on a commercial Ni-Zn AA-type battery and, particularly, phenomena occurring during overcharge were considered. Beyond the example of this study on a Ni-Zn battery, these two techniques offer complementary information that can be very useful for the monitoring and management of different type of batteries.