| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium secondary battery capable of improving the output. <P>SOLUTION: The lithium secondary battery is housed in a battery can, with four winding bodies 22 placed side by side. Positive/negative electrode plates are wound via a separator at each winding body 22. Capacitance per one winding body 22 is set to be 1.5 Ah or below. A positive electrode mixture is coated longitudinally, at a center section of a positive electrode current-collection foil on the positive electrode plate, and non-coated sections are formed on both sides of the positive electrode current-collection foil. One positive electrode tab 12 is introduced from each non-coated section. A negative electrode mixture is coated longitudinally at a center section of a negative electrode current-collection foil on the negative electrode plate, and non-coated sections are formed on both sides of the negative electrode current-collection foil. One negative electrode tab 13 is introduced from each non-coated section. For the positive electrode tab 12 and the negative electrode tab 13, each cross section in a direction orthogonal to the current-conduction direction per tab is set to 0.3-0.4 mm<SP>2</SP>. <P>COPYRIGHT: (C)2010,JPO&INPIT |
