| 摘要 |
Provided is an electrode plate rolling device for a secondary battery, which prevents stress from concentrating on a spot between a mandrel and an electrode plate when an electrode plate is rolled around a mandrel. The electrode plate rolling device for a secondary battery has a rolling mandrel for winding first and second electrode plates coated with an active material layer having polarity and a separator. The mandrel comprises a body part(103) that is divided into two parts(103a,103b) having an oval cross section, wherein the curved surface of the divided part(103a) is formed to have different curvature in at least two portions(R1,R2,R3); and a feed groove(101) formed in the middle of the body part(103) as a yardstick for dividing the body part(103) into two parts(103a,103b). |
