Single point diagnosis of short circuit abuse condition in lithium‐ion battery through impedance data

摘要: Lithium‐ion batteries have a confined frame of stability features in context to voltage and temperature. Abrupt attenuation in the above features may result in safety concerns. The present work provides an imperative experimental single point impedance diagnostic for analysis of external (soft) short‐circuit abusiveness as per IEC 62660‐2(3) of PANASONIC NCR 18650PF 3.6 V 2750 mAh lithium‐ion battery using 5 mΩ resistance applied externally across battery terminals using BK Precision 8510 programmable DC load. Characterization of the abusiveness of the test battery has been performed through the electrochemical AC impedance for single point impedance measurement at 1 KHz. Variations in the battery parameters during the test condition were also measured and analysed. Results reveal that the test battery experiences a rapid increase in the temperature rise where anodic reactions in the battery …