| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery which has desired characteristics for a portable telephone set such as excellent low temperature pulse discharging characteristic, low temperature charging characteristic, safety at overcharging, and heat resistance, and to provide its manufacturing method. <P>SOLUTION: The lithium secondary battery comprises positive electrodes and negative electrodes including active materials capable of occluding and desorbing lithium ions, separators, and nonaqueous electrolyte. The manufacturing method for the lithium secondary battery at least includes a first heat treatment process, in which heat treatment is performed with charging depth of 15-30% under a low temperature environment, and a second heat treatment process, in which heat treatment is performed with charging depth of 50-100% under a high temperature environment, and the heat treatment processes are performed successively. <P>COPYRIGHT: (C)2004,JPO |
