Flexible Power Storage Packaging With Electrolyte-Resistant Adhesive
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Solution Overview
Problem
Power storage devices with metal foil layers have low flexibility and electrolytic solution resistance, making them unsuitable for applications requiring conformability and durability, such as wearable terminals.
Innovation Solution
A power storage device packaging material with a laminated structure comprising a heat-sealable resin layer, a gas barrier film layer, and adhesive layers, where at least one adhesive layer between the resin and gas barrier film has electrolytic solution resistance, enhancing flexibility and gas barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal foil layer is used in the packaging material, then gas barrier properties are improved, but flexibility deteriorates
Solution Approach 1:
The patent uses a composite structure consisting of a resin base material and a gas barrier film layer (such as vapor-deposited inorganic films or thin metal films) to achieve both gas barrier properties and flexibility. This composite approach allows the packaging material to maintain the benefits of metal foil layers while eliminating their drawbacks.
Solution Approach 2:
The patent employs thin film structures, particularly vapor-deposited inorganic films with thickness of 1 nm to 100 nm, which provide effective gas barrier properties while maintaining flexibility. The thin film approach allows the packaging material to be conformable without the rigidity associated with traditional metal foil layers.
2Adaptability or versatility
If the packaging material is made flexible, then adaptability to diverse shapes is improved, but gas barrier properties deteriorate
Solution Approach 1:
The patent uses flexible thin film structures, particularly vapor-deposited inorganic films with thickness of 1 nm to 100 nm, which provide effective gas barrier properties while maintaining flexibility. These thin films can conform to diverse shapes without compromising their gas barrier function.
Solution Approach 2:
The patent optimizes the thickness parameter of the gas barrier film to achieve the right balance between flexibility and gas barrier properties. By controlling the film thickness within a specific range (1 nm to 100 nm), the material becomes flexible enough for conformable applications while maintaining sufficient gas barrier performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The packaging material achieves good flexibility and electrolytic solution resistance, enabling its use in diverse shapes and conformable applications while maintaining mechanical strength and gas barrier performance.
Implementation Method 1
at least an adhesive layer disposed between the heat-sealable resin layer and the gas barrier film layer has electrolytic solution resistance
Implementation Method 2
the gas barrier film layer includes a resin base material and a gas barrier film disposed on one surface or both surfaces of the resin base material
Data Source
AI summary
A power storage device packaging material has good flexibility, and has electrolytic solution resistance. A power storage device packaging material in which a plurality of films are laminated, the packaging material including a heat-sealable resin layer, a gas barrier film layer laminated and disposed on one surface of the heat-sealable resin layer, and a plurality of adhesive layers, wherein the gas barrier film layer includes a resin base material and a gas barrier film disposed on one surface or both surfaces of the resin base material, and of the plurality of adhesive layers, at least an adhesive layer disposed between the heat-sealable resin layer and the gas barrier film layer has electrolytic solution resistance.