Battery Terminal Anodic Coating for Compact Insulated Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand for further miniaturization of batteries while maintaining electrical connectivity and insulation, as existing battery designs face challenges in reducing size without compromising performance and longevity.
Innovation Solution
The implementation of a battery design featuring a positive electrode terminal with an anodic oxide coating and an adhesive layer, which reduces the thickness of the adhesive layer and eliminates the need for additional insulating layers, allowing for a more compact battery form factor while maintaining insulation and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional battery designs are used, then electrical connectivity and insulation are maintained, but battery size cannot be further reduced
Solution Approach 1:
The anodic oxide coating integrates multiple functions into a single layer: it provides electrical insulation between the positive electrode terminal and adhesive layer, while simultaneously serving as a surface treatment for the aluminum terminal. This merging of insulation function into the coating eliminates the need for separate insulating layers, enabling battery miniaturization without compromising electrical connectivity or insulation reliability
Solution Approach 2:
The invention changes the physical and chemical parameters of the positive electrode terminal surface by applying an anodic oxide coating. This coating transforms the aluminum surface into an insulating layer with controlled thickness and properties, enabling reduced adhesive layer thickness while maintaining reliable insulation and electrical connectivity functions
2Volume of moving object
If adhesive layer thickness is reduced for miniaturization, then battery volume decreases, but insulation reliability may be compromised
Solution Approach 1:
The anodic oxide coating is formed on the positive electrode terminal surface before assembling the battery components. This preliminary surface treatment ensures that the insulation function is already in place, allowing the adhesive layer to be applied thinner while maintaining reliable insulation between the terminal and adhesive layer, thus enabling miniaturization without compromising insulation reliability
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
This design enables the miniaturization of batteries by reducing the thickness of the adhesive layer and utilizing the anodic oxide coating for insulation, enhancing the battery's lifespan and capacity retention ratio, and preventing short circuits.
Implementation Method 1
an anodic oxide coating is provided on a portion of the positive electrode terminal facing the adhesive layer
Implementation Method 2
an adhesive layer that joins the housing and the positive electrode terminal
Data Source
AI summary
A battery is provided and includes: a battery element body including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; a housing that houses the battery element body and is provided with an opening; and a positive electrode terminal that is disposed outside the housing, is joined to an edge portion of the opening with an adhesive layer interposed therebetween in a state of covering the opening, and includes aluminum or an aluminum alloy. The housing is electrically connected to the negative electrode of the battery element body. In the positive electrode terminal, a first portion overlapping the opening when viewed from a direction intersecting the edge portion of the opening is electrically connected to the positive electrode of the battery element body, and an anodic oxide coating is provided at a portion of the positive electrode terminal facing the adhesive layer.