| 摘要 |
PROBLEM TO BE SOLVED: To prevent a large burr of an electrode collector from generating on a cut surface by cutting a battery electrode in a heated condition at a specified temperature. SOLUTION: A battery electrode 1 provided with an electrode active material layer 3 on an electrode collector 2 is cut in a heated condition within a range of 60-135 deg.C, preferably 80-135 deg.C. When the heating temperature of the battery electrode 1 at the time of cutting is below 60 deg.C, the softening of a binder forming the electrode active material layer 3 is insufficient, and a cutting load from a cutting blade is dispersed by the electrode active material layer, and is not concentrated to the electrode collector 2 to cause elongation in the electrode collector 2, causing the large burr 5 of the electrode collector 2. While, when the heating temperature of the battery electrode 1 at the time of cutting exceeds 135 deg.C, the large burr 5 of the electrode collector 2 in a cut surface can be prevented, but another defect of separation of the electrode active material layer 3 from the electrode collector 2 is caused. |
