| 摘要 |
<P>PROBLEM TO BE SOLVED: To manufacture a nonaqueous electrolyte secondary battery having improved low temperature characteristics and storage property without accumulating gas generated during initial charge in the battery. Ž<P>SOLUTION: A method of manufacturing the nonaqueous electrolyte secondary battery, wherein an electrode group consisting of a negative electrode using a carbon material containing boron as a negative electrode active material, a positive electrode and a separator isolating both electrodes from each other is formed to be stored in a battery can together with nonaqueous electrolytic solution, includes an electrode group inserting step of inserting the electrode group into the battery can, a nonaqueous electrolytic solution filling step of filling the nonaqueous electrolytic solution containing propylene carbonate (PC) after the electrode group inserting step, a pre-processing step of charging the battery up to a depth of ≥50 mAh/g per unit mass of the negative electrode in a temperature environment of 35-55°C in inactive gas atmosphere after the nonaqueous electrolytic solution filling step, and a sealing step of sealing the battery. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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