Case structure for containing right-angled parallelepipedic structure square secondary batteries, has deformation surfaces whose in-between distance is equal to deformation space width that is higher or equal to two-fifth of thickness

摘要

The structure has assembly surfaces on which receiving grooves and ribs are formed alternately. The grooves are aligned in pairs to define a rectangular space between the grooves. Distance between two deformation surfaces (241, 242) of two close square secondary batteries (201, 202) is defined to be equal to width (A) of a deformation space (50) while distance between the deformation surfaces of one of the same square secondary battery is defined as thickness (B) of a square secondary battery (20). The width is higher or equal to two-fifth of the thickness.