Battery case and side wall thereof

The utility model discloses a battery case and side wall thereof, the side wall includes: a plurality of aluminium alloies, a plurality of aluminium alloies connect gradually and form loop configuration, be formed with bottom plate cooperation step and transverse beam cooperation step on the aluminium alloy. According to the utility model discloses a battery case's side wall, through setting up the aluminium alloy, the weight of side wall is lighter, makes simply moreover, and manufacturing nature is good, moreover through setting up bottom plate cooperation step and transverse beam cooperation step, can improve the reliability of being connected between side wall and bottom plate and the transverse beam. 本实用新型公开了种电池壳体及其侧围，侧围包括：多个铝型材，所述多个铝型材依次连接形成闭环结构，所述铝型材上形成有底板配合台阶和横向梁配合台阶。根据本实用新型的电池壳体的侧围，通过设置铝型材，侧围的重量较轻，而且制造简单，制造性好，而且通过设置底板配合台阶和横向梁配合台阶，可以提高侧围与底板和横向梁之间的连接可靠性。