Analysis of the Cylindrical Lithium-Ion Battery by X- Ray CT System and Introduction to the Charge/Discharge Device Attached System

User Benefits

・Microfocus X-ray CT system enables the observation of internal structure in lithium-ion batteries. ・The distance between the electrodes can be measured, and the junction of the positive/negative terminal leads can be observed. ・The charge/discharge device attached system enables changes in the internal structure of the battery to be observed after charging and discharging.

Introduction

Lithium-ion batteries (LIB) are secondary batteries in which Li ions move between the cathode and anode to charge/discharge, and are classified into three types, cylindrical, square, and laminated, depending on the shape of the cell. Especially, the cylindrical LIB is widely used in mobile batteries, notebook computers, etc. because of its low manufacturing cost and high energy density. In recent years development for electric vehicles has been remarkable, and research and development are progressing in pursuit of higher performance such as higher output and large capacity. On the other hand, LIBs may have manufacturing defects such as short circuits due to foreign matter mixed in the electrodes and unwinding, and such defects may result in combustion and explosion accidents. Therefore, setting the manufacturing conditions for development prototypes and their inspection are important. The X-ray CT system is an effective tool for analyzing the inside of batteries non-destructively. This article introduces analyses of a cylindrical LIB using an X-ray CT system and the charge/discharge device attached system.

April 5, 2022 GMT