| 摘要 |
A coin type nonaqueous electrolyte secondary battery is provided to increase discharge load characteristics and to prevent the deformation of a battery due to charge/discharge. A coin type nonaqueous electrolyte secondary battery comprises a band type positive electrode; a band type negative electrode; a band type separator; and a coin type battery can, wherein the positive electrode and the negative electrode are wound with the separator to form a cylindrical jelly roll(10), the winding direction of the jelly roll is identical to the height direction of the battery can, the ratio(D/H) of the outer diameter(D) of the jelly roll to the height(H) of the winding direction of the jelly roll is 1-25, and the ratio(R/A) of the area(A) of the upper surface of the jelly roll and the reaction efficient area(R) where the two electrodes meet each other is 9-25. |
