Pouch Battery Seal Thickness Measurement on Curved Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for measuring the thickness of a pouch battery's sealing portion are prone to measurement errors when dealing with inclined or curved objects due to their point measurement approach.
Innovation Solution
An object thickness measuring apparatus and method that utilizes a first scan unit to measure the opaque layer and a second scan unit to measure the transparent layer, generating three-dimensional data to accurately calculate the thickness by converting curved surfaces into a plane, with alignment precision improved through software-based methods and vision alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If point measurement method is used, then measurement process is simple, but measurement precision deteriorates when measuring inclined or curved objects
Solution Approach 1:
The patent transitions from point measurement to surface scanning by introducing a laser line projector that projects a line of light onto the sealing portion surface. This dimensional change from point to line enables capture of surface curvature and inclination information, allowing accurate thickness measurement even on curved or inclined surfaces through three-dimensional data processing.
Solution Approach 2:
The patent creates a three-dimensional digital copy of the sealing portion surface using laser scanning and camera imaging. This virtual model allows for precise thickness calculation by comparing the projected laser line position with the actual surface topology, eliminating measurement errors caused by surface curvature without requiring physical contact with the object.
2Ease of manufacture
If manual measurement method is used, then equipment cost is low, but productivity deteriorates
Solution Approach 1:
The patent replaces manual mechanical measurement tools (micrometers, dial gauges) with an automated optical measurement system consisting of laser line projector, camera, and computer processing. This substitution eliminates manual operation while maintaining relatively low equipment costs, significantly improving measurement speed and productivity through automated capture and processing of three-dimensional surface data.
Solution Approach 2:
The measurement system automatically captures surface geometry, processes the three-dimensional data, and calculates thickness without requiring operator intervention. The system self-calibrates and self-measures, enabling high-speed continuous measurement of multiple sealing portions while maintaining simplicity and low cost.
3Loss of time
If conventional thickness measurement method is used, then measurement is quick, but measurement precision deteriorates on curved surfaces
Solution Approach 1:
The patent employs continuous laser line scanning across the entire sealing portion surface rather than discrete point measurements. This continuous scanning approach captures the complete surface topology in a single operation, enabling accurate thickness measurement of curved surfaces without requiring multiple measurement steps or repositioning, thus maintaining quick measurement speed while improving 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
Enables precise and automated measurement of the sealing portion thickness of pouch batteries, reducing measurement errors and accommodating various battery types.
Implementation Method 1
two distance measuring sensors coupled to the support member, spaced apart from one another, and configured to measure a distance to an object
Implementation Method 2
The second scan unit may be a confocal sensor
Data Source
AI summary
An object thickness measuring apparatus of the present disclosure includes: a transfer unit configured to transfer a pouch-type rechargeable battery including a sealing portion; a first scan unit configured to scan an opaque layer excluding an outermost transparent layer in the sealing portion; a second scan unit configured to scan the transparent layer in the sealing portion; and a controller configured to calculate a thickness of the sealing portion from three-dimensional data generated by collecting image data measured by the first scan unit and image data measured by the second scan unit.