Gasket Rust Inhibitor for Secondary Battery Crimping Parts
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Solution Overview
Problem
Lithium secondary battery gaskets are prone to rusting in high temperature/high humidity environments, particularly at crimping parts where iron is exposed, leading to sealing issues and potential battery performance degradation.
Innovation Solution
A rust inhibitor for gaskets, comprising an anti-rust material and a polymer resin, where the anti-rust material includes specific compounds that form a hydrophobic layer to prevent iron exposure from moisture and oxygen, dispersed at an angstrom level to maintain sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymer resin gasket is used to seal the battery, then sealing properties are provided, but rust occurs at the crimping part in high temperature/high humidity atmosphere
Solution Approach 1:
A rust inhibitor layer is introduced as an intermediary substance between the iron-containing crimping part and the corrosive environment. This layer prevents direct contact between moisture/oxygen and the iron surface, eliminating the rusting problem while maintaining the sealing function of the polymer resin gasket.
Solution Approach 2:
The solution combines polymer resin with rust inhibitor compounds to create a composite material system. The polymer resin provides sealing properties while the rust inhibitor component protects the crimping part from corrosion, achieving both sealing and anti-rust functions simultaneously.
2Object-affected harmful factors
If anti-rust material is added to the gasket, then rust is prevented, but sealing properties may deteriorate
Solution Approach 1:
The patent optimizes the concentration and distribution parameters of the rust inhibitor within the gasket material. By controlling the amount and placement of anti-rust compounds, the solution achieves effective rust prevention while maintaining adequate sealing properties through proper parameter balancing.
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 rust inhibitor effectively minimizes rust generation at crimping parts while maintaining the sealing integrity of the gasket, even under high temperature/high humidity conditions, by using a polymer resin with polyethylene or copolymers and anti-rust materials like decanoic acid, ensuring the anti-rust effect and structural integrity of the gasket.
Implementation Method 1
the anti-rust material includes a compound of Formula 1 below... A is a functional group including, at least any one of an oxygen atom, a nitrogen atom or a fluorine atom... the anti-rust material is evaporated and absorbed to a crimping part, particularly a portion in which Fe is exposed, to prevent the Fe from directly contacting moisture and oxygen
Implementation Method 2
the anti-rust material is evaporated and absorbed to a crimping part
Implementation Method 3
the anti-rust material is evaporated and absorbed to a crimping part
Data Source
AI summary
A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.