| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery capable of preventing swelling of a battery jar caused by gas generation on battery operation such as initial charging. <P>SOLUTION: The nonaqueous electrolyte secondary battery comprises an electrode group having a positive electrode, a negative electrode and a separator, and a nonaqueous electrolyte, wherein the electrode group contains such an amount of moisture as an amount of hydrogen generated on the initial charging, which is continued until 4.0 V is achieved with a constant current of 0.5 CmA, is equal to or less than 15 μL per unit volume (cm<SP>3</SP>) of the electrode group. <P>COPYRIGHT: (C)2004,JPO |
