摘要 |
PROBLEM TO BE SOLVED: To restrain increase of manufacturing cost of a battery due to the cost caused by longer hours of a drying process and cost on drying equipment, and even to the cost on manufacturing environment management, to simplify process equipment, and to shorten time taken for battery manufacture. SOLUTION: The manufacturing method of the nonaqueous electrolyte secondary battery made by housing an electrode plate group made by winding around a cathode, an anode, and a separator, and a electrolyte solution comprises: a process of setting a water content of the cathode at 1,000 to 5, 000 ppm; a process of housing the electrode plate group and the electrolyte solution in the battery case; a first aging process; and a second aging process. The first aging process is carried out under conditions of SOC at 40 to 100%, a temperature at 40 to 80°C, and a time of 12 to 72 hours with the battery at a released state, and the second aging is carried out at a temperature lower than in the first aging process. COPYRIGHT: (C)2006,JPO&NCIPI |