| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium ion battery having excellent reliability.SOLUTION: A lithium ion battery includes a lithium ion battery main body having a metallic electrode terminal 101, and a multilayer film outer package 107 which has a heat seal layer 105 formed of thermoplastic resin in an innermost layer thereof and houses a lithium-ion battery body. A peripheral portion 109 of the multilayer film outer package 107 is heat-sealed so that the electrode terminal 101 protrudes to the outside, thereby hermetically sealing the lithium ion battery main body. A fine uneven structure in which convex portions are implanted at an interval period of 5nm or more and 500 μm or less is formed on at least a joint portion surface 104 of the electrode terminal 101 to the heat seal layer 105.SELECTED DRAWING: Figure 2 |
