METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTIC SOLUTION SECONDARY BATTERY

• Main Authors: MAEDA, Masaki, YOGO, Junichi, MIYAKE, Masahide
• Format: Patent
• Language: English
• Published: 12.09.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A manufacturing method disclosed herein includes: a step of constructing a battery assembly in which an electrode body and a non-aqueous electrolytic solution are accommodated in a battery case, the electrode body including a positive electrode and a negative electrode laminated on each other across a separator; a step of initially charging the battery assembly; a high-temperature holding step of holding the battery assembly after subjected to the initial charging step at a high temperature equal to or greater than 40° C.; an ordinary-temperature holding step of holding the battery assembly at an ordinary temperature for a duration exceeding 3 hours after the high-temperature holding step; and a degassing step of pressing the battery assembly after subjected to the ordinary-temperature holding step in a laminating direction of the electrode body and releasing the battery assembly.