| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a coin type nonaqueous electrolyte secondary battery having high storage characteristics and electrolyte leakage resistance characteristics in a high temperature and high humidity condition (60°C-90%RH). <P>SOLUTION: The nonaqueous electrolyte secondary battery is equipped with: a negative electrode containing a lithium titanium oxide as a negative active material; a positive electrode; a nonaqueous electrolyte; a separator, a positive case coming in contact with the positive electrode; a sealing plate coming in contact with the negative electrode; and a gasket made of PFA resin and arranged between the positive case and the sealing plate. An opening part of the positive case is sealed with the sealing plate. The nonaqueous electrolyte is contained 25-45% in the volume ratio to the inner space of the battery, and the compression rate of the gasket between the tip of an opening part on the sealing plate and the positive case is 50-80%. <P>COPYRIGHT: (C)2007,JPO&INPIT |
