| 摘要 |
PROBLEM TO BE SOLVED: To provide a cell case of a secondary cell, which suppresses the influence of the outside temperature, prevents moisture permeation from the outside, and disperses the pressure to focus locally inside the case.SOLUTION: A cell case 3 includes: a first layer 31 that is made of a resin and constitutes the outer surface side of the cell case 3; a third layer 33 that is made of a resin and constitutes the inner surface side of the cell case 3; and a second layer 32 that is arranged between the first layer 31 and the third layer 33 and includes a plurality of hollow parts 32a. |
