ACTIVATION METHODS OF SECONDARY BATTERY AND MANUFACTURING METHODS OF SECONDARY BATTERIES INCLUDING THE SAME

• Main Authors: HAM SEOK WON, CHOI YOUNG SANG
• Format: Patent
• Language: English; Korean
• Published: 30.08.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TESTING

The present invention relates to a method for activating a secondary battery including an activation step of activating the secondary battery. The activation step includes: a prepressure process of pressurizing the secondary battery and simultaneously heating the same using a heat source; an activation process of activating the secondary battery by charging the same with a constant current (CC); and an inspection process of inspecting whether a separator included in the secondary battery is defective using a voltage difference generated when charging the secondary battery. Accordingly, it is possible to detect whether the entire separator included in the secondary battery is defective. 본 발명은 이차전지를 활성화시키는 활성화 단계를 포함하는 이차전지의 활성화방법으로서, 상기 활성화 단계는, 상기 이차전지를 가압함과 동시에 열원을 이용하여 가열하는 예압 공정, 상기 이차전지에 정전류로 CC(constant current) 충전하여 활성화하는 활성화 공정, 및 상기 이차전지의 충전시 발생하는 전압차를 이용하여 이차전지에 포함된 분리막의 불량여부를 검사하는 검사공정을 포함한다. 이에 따라 이차전지에 포함된 분리막 전체의 불량여부를 검출할 수 있다.