| 摘要 |
PROBLEM TO BE SOLVED: To quickly charge a nonaqueous electrolyte secondary battery equipped with a heat-resistant layer consisting of a porous protective film or the like containing a resin binder and an inorganic oxide film between an anode and a cathode. SOLUTION: In carrying out quick charging of a secondary battery such as a lithium ion battery with which CC-CV charging is the standard, such a secondary battery has characteristics that it has the higher inner resistance value the higher its temperature gets, so that an area of a VC (variable current) charging is provided at the conventional CC area, which carries out charging at an optimum charging current value of a maximum level, in which charging current made to flow from temperature of the secondary battery does not rise to over-temperature. With this, the over-temperature is prevented and charging time can be shortened. COPYRIGHT: (C)2008,JPO&INPIT |
