Battery Adhesive Sheet With Vapor-Deposited Insulation for Short-Circuit Heat
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Solution Overview
Problem
Conventional pressure sensitive adhesive tapes used in batteries lack sufficient insulation properties, which can lead to excessive heat generation and potential accidents during internal short circuits.
Innovation Solution
A pressure sensitive adhesive sheet for batteries featuring a vapor-deposition insulating film made from inorganic materials like aluminum oxide, titanium oxide, or silicon nitride, combined with a pressure sensitive adhesive layer, providing enhanced insulation and heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pressure sensitive adhesive tapes are used in batteries, then the basic adhesive function is achieved, but the insulation properties are insufficient leading to heat generation during short circuits
Solution Approach 1:
The patent applies composite materials by combining an inorganic insulating film (such as aluminum oxide, silicon oxide, or silicon nitride) with a pressure sensitive adhesive layer. This composite structure provides both the necessary adhesive properties and high insulation performance, preventing short circuits and heat generation while maintaining the functional requirements of the battery application.
Solution Approach 2:
The inorganic insulating film serves as an intermediary layer between the base material and the pressure sensitive adhesive layer. This intermediate insulating film prevents direct contact between conductive elements, blocking electrical current flow and preventing short circuits while allowing the adhesive to perform its bonding function.
2Reliability
If a sol of metal oxide is used to form a hard coat layer for insulation, then some insulation properties are achieved, but the insulation is insufficient at high temperatures and during prolonged exposure to electrolyte solutions
Solution Approach 1:
The patent changes the physical and chemical parameters of the insulating layer by using vapor-deposited inorganic films with specific properties (high density, low organic content, controlled thickness). These parameter changes enable the insulating film to maintain its insulation performance at high temperatures and during prolonged exposure to electrolyte solutions, overcoming the limitations of sol-based metal oxide coatings.
Solution Approach 2:
The patent applies local quality by creating a dense, homogeneous inorganic insulating film with uniform thickness through vapor deposition. This localized high-quality insulating layer provides consistent insulation performance in critical areas, preventing breakdown under thermal and chemical stress that affects less uniform sol-based coatings.
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 solution effectively suppresses heat generation and maintains high insulation properties even at high temperatures and during internal short circuits, ensuring battery safety.
Implementation Method 1
a vapor-deposition insulating film provided on one surface side of the base material
Data Source
AI summary
A pressure sensitive adhesive sheet for batteries that includes a base material, a vapor-deposition insulating film provided on one surface side of the base material, and a pressure sensitive adhesive layer provided on a surface side of the vapor-deposition insulating film opposite to the base material.