Manufacturing method for battery

Abstract

Abstract PURPOSE:To more fully solidify the thermal weld between a container cover and the container by forming the weld surface between the container cover and the container in a recessed surface with a circular cross-section, welding the recessed surface to a heat plate having the same shape as the recessed surface, and then welding said surface to the container. CONSTITUTION:The weld surface 1 between a container cover made of polypropylene resin and a container made of polypropylene forms a recessed surface with a circular cross-section. For the weld between the container cover and the container, using a hot plate 6 in which one surface is provided with a protruded surface with a circular cross- section to melt the weld surface 1 and the other surface is provided with a flat surface 5 to melt the weld surface 4 of a container 3, a protruded surface 2 is made to touch the weld surface 1 and the flat surface 5 is made to touch the weld surface 4 and the weld surfaces 1 and 4 are melted. The weld surface 1 forms a melted layer 1a with a circular cross-section and both the lower ends 1b of the layer 1a hang downward so as to open outside slightly and the weld surface 4 forms a flat melted layer 4c and both the ends 4 of a layer 4c is spread laterally. As a result, the layers 1a and 4c are press-jointed and the thermal weld between the container cover and the container can be more fully solidified.

Inventors

• 👤 Takeshi Hamaguchi
• 👤 浜口　武司

Bibliographic Details