Solid-State Battery Package With Water Vapor Barrier Layer
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Solution Overview
Problem
Solid-state batteries mounted on substrates face inadequate prevention of water vapor infiltration, leading to potential deterioration of battery characteristics over time.
Innovation Solution
A solid-state battery package is designed with a substrate and a water vapor barrier layer between the substrate and the battery, effectively preventing water vapor transmission and enhancing the battery's longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a substrate is used to mount the solid-state battery, then the battery is adapted for mounting and electrical connection is enabled, but water vapor infiltration occurs leading to battery characteristic deterioration
Solution Approach 1:
An organic-inorganic composite coating layer is applied as an intermediary between the substrate and the solid-state battery. This coating layer acts as a mediator that blocks water vapor transmission from the substrate to the battery while allowing electrical connection to pass through, thus preventing battery characteristic deterioration without compromising mounting adaptability
Solution Approach 2:
The patent uses an organic-inorganic composite coating material that combines the advantages of both organic and inorganic materials. The composite structure provides effective water vapor barrier properties while maintaining electrical conductivity and mechanical flexibility needed for mounting applications
2Reliability
If the substrate thickness is increased to prevent water vapor infiltration, then water vapor transmission is reduced, but the overall package size and complexity increase
Solution Approach 1:
The patent employs a thin film coating layer instead of increasing substrate thickness. This thin film provides effective water vapor barrier properties without adding significant thickness or structural complexity to the substrate, maintaining a compact and simple overall device structure
Solution Approach 2:
The invention changes the material parameters of the substrate surface by applying a coating layer with specific water vapor barrier properties, rather than changing the physical dimensions (thickness) of the substrate. This approach achieves water vapor prevention while maintaining the original substrate structure
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 water vapor barrier layer significantly reduces moisture infiltration, thereby maintaining the solid-state battery's performance and reliability over a longer period.
Implementation Method 1
a water vapor barrier layer between the substrate and the solid-state battery
Data Source
AI summary
A solid-state battery package that includes: a substrate; a solid-state battery on the substrate; and a water vapor barrier layer between the substrate and the solid-state battery. The water vapor barrier layer preferably has both an Si—O bond and an Si—N bond, and preferably has a water vapor transmission rate of less than 5×10−3 g/(m2·Day).