| 摘要 |
A secondary battery is provided to improve reliability by easily separating the electrode assembly from mandrel in winding, through attaching a separate film having a smaller frictional coefficient than that of a ceramic separator to the extended region including the uncoated area of a current collector coated with the ceramic separator. A jelly roll type electrode assembly containing a positive plate and a negative plate comprises a ceramic separator preventing the short circuit of the negative plate and the positive plate, which is coated on one surface of the positive plate or the negative plate; and a film separator adhered separately from the ceramics separator. |
