RESIN FILM, METAL TERMINAL MEMBER, AND SECONDARY CELL

摘要

This resin film is disposed between a lead connected to a positive electrode and to a negative electrode inside a cell, and a sealant layer in a casing for a secondary cell having the sealant layer, the sealant layer being formed from a polyolefin resin, wherein the resin film has a first layer disposed in a position near the lead, and a second layer disposed in a position near the sealant layer, the heat of fusion of the second layer measured according to JISK7122 being higher than heat of fusion of the first layer measured according to JISK7122.