Battery container and its manufacturing method

摘要

A battery container 10 includes a case member 1, one side of the case member 1 being opened, and a closing member 2 for closing the opening. Further, a material-shortage section 24 is formed near a welding section 13, the case member 1 and the closing member 2 being brought into contact with each other and welded in the welding section 13 by irradiating the welding section 13 with a welding beam. Further, the case member 1 is welded with the closing member 2 so that the welding section 13 reaches the material-shortage section 24. Note that a width of the material-shortage section 24 in a welding beam irradiation direction may be equal to or greater than one third of a fusion depth of the welding section 13.

主权项

1. A battery container comprising:
a case member, one side of the case member being opened; and a closing member for closing the opening, wherein a material-shortage section is formed adjacent to a welding section, the case member and the closing member being brought into contact with each other and welded in the welding section by irradiating the welding section with a welding beam, the case member is welded with the closing member so that the welding section reaches the material-shortage section, a thick-wall section is formed along an irradiation direction of the welding beam, the thick-wall section being thick toward an outer side of the case member or the closing member, and the thick-wall section comprises a thickness gradually-changing section and a constant thickness section, the thickness gradually-changing section getting gradually thicker toward an outer side, the constant thickness section being integrally formed with the thickness gradually-changing section and having a constant thickness.