Fast electrochemical impedance spectroscopy of lithium-ion batteries based on the large square wave excitation signal

• DOI: 10.1016/j.isci.2023.106463
• Publication Date: 2023-03-22T07:54:30Z
• Authors: Lujun Wang; Ziang Song; Lijun Zhu; Jiuchun Jiang
• Keywords: SIGNAL (programming language); Square wave

Electrochemical impedance spectroscopy (EIS) is a technique for electrochemical characterization that sensitive to the battery state and can uncover multidimensional evolution information within battery. Lithium-ion batteries usually need be used in conjunction with power conversion circuits, while conventional EIS testing conducted offline time-consuming, which cannot effectively monitor characteristics during use. To match of square wave signal switching, rapid measurement method lithium-ion based on large excitation proposed this paper, develops device response time microseconds. The are applied estimate health (SOH) In conclusion, we enhances capabilities technology has good application prospect real-time online monitoring.