LITHIUM-ION BATTERY AND METHOD FOR PRODUCING SAME

• Main Author: NOGUCHI TOSHIMITSU
• Format: Patent
• Language: English; Korean
• Published: 17.08.2012
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided is a lithium-ion battery wherein internal short-circuits that are caused by inclusion of metallic foreign matter can be detected early with high sensitivity. Also provided is a method for producing the same. The lithium-ion battery, which is provided with a positive electrode (16), a negative electrode (15), and an electrolyte, is further provided with an electric insulating layer (3) which is between the positive electrode and the negative electrode and comprises an electroconductive layer (4). By applying a voltage between the positive electrode (16) and the electroconductive layer (4), and measuring a current and a potential difference between the positive electrode (16) and the electroconductive layer (4), the possibility of the occurrence of internal short-circuits in the lithium-ion battery can be detected early with high sensitivity since there is an earlier occurrence of a short-circuit between the positive electrode and the electroconductive layer than between the positive electrode and the negative electrode.