Study on Charge and Discharge Phenomenon of Lithium Ion Battery Under High Electric Field

Abstract

It aims to clarify the influence of high electric field on lithium ion battery and to contribute to the establishment of appropriate use of it. In this study, a lithium ion battery is installed in the vicinity of a spherical electrode (diameter 100 mm) kept at a direct current ±10 kV and the presence or absence of a voltage change of the lithium ion battery. (1) A gap (20 mm) is provided between a needle electrode (tip radius of curvature 51 μm) attached to the positive electrode of a lithium ion battery and a spherical electrode, and the negative electrode is grounded. When applying +10 kV, the voltage rose by about 15 mV in 300 s, and the lithium ion battery was charged. When −10 kV was applied, the voltage dropped by about 10 mV in 300 s, and it was discharged. (2) A gap (10 mm) is provided between the needle electrode attached to the positive electrode of the lithium ion battery, and the spherical electrode, and the needle electrode attached to the negative electrode, and the grounded spherical electrode (diameter 100 mm). In this case, the lithium ion battery voltage has changed. Therefore, Lithium ion battery was found to be affected by high electric fields. It is presumed that the voltage of the battery changes because corona discharge causes charge transfer in the gap and a chemical reaction of the lithium ion battery occurs.