Apparatus and Method for Accurate Energy Device State-of-Health (SoH) Monitoring

摘要

A device and associated testing method for testing state of health of an energy device, comprising: applying electrical excitations to the energy device at a predetermined electrical excitation frequency ωe; applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ωm; measuring an electrically-induced phase difference Δθe (ωe) between voltage (V) and current (I) within the energy device from applying the electrical excitations; measuring a mechanically-induced phase difference Δθe (ωm) between voltage (V) and current (I) within the energy device from applying the mechanical excitations; and deducing the state-of-health of the energy device by comparing the electrically-induced phase difference Δθe (ωe) with the mechanically-induced phase difference Δθe (ωm).

主权项

1. A method for testing the state-of-health of an electrochemical energy device, comprising:
applying electrical excitations to the energy device at a predetermined electrical excitation frequency ωe; applying mechanical excitations to the energy device at a predetermined mechanical excitation frequency ωm; measuring an electrically-induced phase difference Δθe(ωe) between voltage (V) and current (I) within the energy device from applying said electrical excitations; measuring a mechanically-induced phase difference Δθe(ωm) between voltage (V) and current (I) within the energy device from applying said mechanical excitations; and deducing the state-of-health of said energy device by comparing said electrically-induced phase difference Δθe(ωe) with said mechanically-induced phase difference Δθe(ωm).