Secondary battery and secondary battery module

Abstract

A secondary battery according to the present invention is a secondary battery including: an electrode laminated body comprising a positive electrode and a negative electrode laminated with each other via a separator; an electrolytic solution; and an exterior body accommodating the electrode laminated body and the electrolytic solution, in which a thickness of the negative electrode changes due to charging and discharging of electricity, the exterior body is able to expand and contract or deform in lamination directions of the electrode laminated body, and a space forming member forming an electrolytic solution temporary storing space that is able to absorb and discharge the electrolytic solution is disposed between at least one side surface, extending in the lamination directions, of the electrode laminated body and an inner surface of the exterior body.

Dependencies are inferred from the claim text.