| 摘要 |
<p>PURPOSE: A pouch type exterior material is provided to improve battery safety by being used as a heat absorbent to absorb heat when an abnormal phenomenon occurs. CONSTITUTION: A pouch type exterior material(100) is formed of an internal resin layer(110), a metal film layer(130), and an external resin layer(140). A soldering material layer is formed on the whole or a part of a surface where the inner resin layer and the metal thin film layer come into contact with each other. The soldering material layer is formed of a metal ally melt at 250°C or less. The metal alloy comprises two or more selected from tin, copper, nickel, and silver and comprises 80 weight% or more of tin. The thickness of the soldering material layer is 0.1-2 mm.</p> |
