Battery accommodation tray

A battery housing tray comprising a battery housing structure, wherein the battery housing structure comprises:

• a plurality of housing parts that each house a battery and are disposed spaced apart from each other, each of the housing parts including
• an insertion opening demarcated by an insertion-side annular part having an annular shape when seen from an insertion side of the battery in a height direction, and
• a receiving-side annular part that has an annular shape and supports the battery housed in the housing part, on an opposite side to the insertion opening side in the height direction;
• an insertion-side joining part for joining an outer peripheral surface of the insertion-side annular part to an outer peripheral surface of another insertion-side annular part next to the insertion-side annular part;
• and
• a receiving-side joining part for joining an outer peripheral surface of the receiving-side annular part to an outer peripheral surface of another receiving-side annular part next to the receiving-side annular part,
• wherein
• a plurality of the insertion-side annular parts are joined and integrated by a plurality of the insertion-side joining parts,
• a plurality of the receiving-side annular parts are joined and integrated by a plurality of the receiving-side joining parts, and
• an extending direction of the receiving-side joining part is inclined with respect to an extending direction of the insertion-side joining part.