MANUFACTURING METHOD FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method for a nonaqueous electrolyte secondary battery that provides a high-performance and highly reliable battery by suppressing a reduction in initial capacity or an increase in internal resistance. SOLUTION: The manufacturing method is to manufacture a nonaqueous electrolyte secondary battery having a power generating part made up of a positive electrode plate and a negative electrode plate that are wound via a separator, wherein initial charge/discharge and aging treatment are performed in an open state and in an atmosphere where oxygen exists. During the initial charge/discharge and/or the aging treatment, at least a negative electrode mix portion of the power generating part is immersed in an electrolyte solution. COPYRIGHT: (C)2005,JPO&NCIPI