Battery block and secondary battery module

A battery block, comprising:

• a cylindrical plurality of battery cells arranged;
• and
• two holding members sandwiching the arrangement of the battery cells from a radial direction of the battery cells for holding, the two holding members facing each other, wherein
• first holding recesses are formed by first semicircular members on one of the two holding members, each first semicircular member holding an outer periphery of each end of each battery cell in a respective first holding recess,
• two protrusions extending radially inwardly from the first semicircular member and in contact with an outer peripheral face of each end of each battery cell are formed at each first holding recess,
• second holding recesses are formed by second semicircular members on the other holding member, each second semicircular member holding an outer periphery of each end of each battery cell in a respective second holding recess and being arranged opposite to the corresponding first holding recess,
• an elastically deformable pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction is integrally formed along each second holding recess, and
• the two protrusions are in contact with an outer peripheral face of each end of each battery cell and the elastically deformable pressing part presses the outer peripheral face, thereby allowing the two holding members to hold the plurality of battery cells,
• wherein the elastically deformable part includes a pair of connecting legs connected to a base portion of the other holding member and an elastically deformable leg connected at its ends to the pair of connecting legs and being spaced from the base portion of the other holding member.