| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic solution secondary battery, of which the decrease of capacity and output resulting from charge/discharge cycles can be suppressed to make the life of the battery long. SOLUTION: A cylindrical lithium ion battery is manufactured, using manganese acid lithium or cobalt acid lithium for a positive electrode and amorphous carbon powder or graphite powder for a negative electrode. In the manufactured battery, the ratio of an internal resistance for 85% of DOD(depth of discharge) is made lower than 150% to that for 0% of DOC. In this manner, the differences between respective internal resistances can be made small in the whole range of charge and discharge for practical applications, so that the discharge efficiency of the battery can be improved. |
