| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium ion battery pack in which charging time can be made shorter than that of a conventional one and in which high cycle characteristics and safety can be secured at the same time. <P>SOLUTION: The lithium ion battery pack 10 is constituted by connecting in parallel a first lithium ion secondary battery 12 in which thickness of an anode active material layer is within a range of 10 to 40 μm and furthermore thickness of a cathode active material layer is within the range of 10 to 40 μm to a second lithium ion secondary battery 14 in which volume energy density is 250 Wh/l or more. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
