| 摘要 |
PURPOSE:To prevent protrusion in the periphery of negative electrode by forming a protruding part, which prevents generation of protrusion in the periphery of negative electrode caused by deformation, in the periphery of the compression surface of a compression head. CONSTITUTION:A compression surface 30a is formed by recessing the central part except for the protruding part 30b in the periphery on the bottom side of a compression head 30. The diameter of the compression surface 30a is slightly larger than that of a negative electrode 20 comprising a lithium disk. The protruding part 30b electrode 20 before deformation. When the negative electrode is pressed with the compression head, the periphery of the negative electrode 20 is deformed outerward, but the protruding part 30b of the compression head 30 prevents protrusion of the negative electrode. |
