Pouch Battery Sealing Gap Sensing for Uniform Seal Thickness
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Solution Overview
Problem
Existing sealing technologies for pouch type secondary batteries face challenges in maintaining uniform thickness of the sealing portion due to difficulties in visually detecting gaps between sealing apparatuses, leading to non-uniform pressing and reduced processing stability.
Innovation Solution
An apparatus with adjustable sealing parts and a sensing part that includes a pressure sensor to detect changes in pressure and gap, ensuring uniform thickness by controlling the distance between sealing parts and providing an alarm or adjusting movement based on pressure values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sealing apparatus uses protrusions to limit movement and prevent excessive pressing, then the sealing structure is simple and easy to operate, but the gap between protrusions cannot be visually detected leading to non-uniform sealing thickness
Solution Approach 1:
The patent introduces a sensing part that detects the gap between protrusions of opposing sealing apparatuses and provides feedback information. This feedback mechanism enables real-time monitoring of the sealing gap, allowing the system to maintain uniform sealing thickness by detecting and reporting deviations from the desired gap distance, thereby resolving the contradiction between simple operation and precise sealing thickness control
Solution Approach 2:
The patent replaces the purely mechanical visual inspection method with a sensing system that uses electrical or electronic detection mechanisms. The sensing part detects the gap between protrusions through non-contact or minimal-contact sensing, substituting the need for visual detection and manual adjustment with an automated sensing and feedback system, thus achieving both ease of operation and manufacturing precision
2Adaptability or versatility
If the protrusions are spaced apart due to tolerance in sealing material thickness, then the sealing apparatus can accommodate material variations, but the gap cannot be detected through naked eyes reducing measurement precision
Solution Approach 1:
The sensing part provides continuous feedback on the actual gap distance between protrusions, enabling precise measurement of gaps that result from material thickness variations. This feedback mechanism allows the system to accommodate tolerances while maintaining measurement precision, as the sensing system can detect and report the actual gap size regardless of its visual detectability
Solution Approach 2:
The patent replaces visual measurement with an automated sensing system that can precisely measure small gaps between protrusions. The sensing part uses electrical, optical, or other non-contact sensing methods to detect gap distances that are too small to be seen by the naked eye, thereby maintaining adaptability to material variations while achieving high measurement precision
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
Ensures uniform thickness of the sealing portion by detecting pressure changes and adjusting the gap between sealing parts, preventing excessive or insufficient pressing, thereby improving processing stability and consistency.
Implementation Method 1
at least one sensing part that is provided between the pair of sealing parts and detects a change in pressure according to a change in gap between the pair of sealing parts
Data Source
AI summary
An apparatus for sealing a secondary battery including a pouch type battery case includes a pair of sealing parts and at least one sensing part. The pair of sealing parts are disposed to face each other with a battery case interposed therebetween where the distance between the pair of sealing parts is adjustable. The sensing part is positioned between the pair of sealing parts and configured to detect a change in pressure according to a change in the distance between the pair of sealing parts.