A battery case 100 for an electric vehicle comprises: a bathtub-shaped tray 120 having a concave accommodating portion 122 for accommodating a battery 30; a frame 110 disposed so as to surround the entire circumference of the tray 120 in a plan view and joined to the tray 120; a top cover 130 disposed above the tray 120 and closing the accommodating portion 122; and an undercover 140 disposed below the tray 120.
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