Pouch Battery Fluorescent Markers for Precise Dimension Measurement
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Solution Overview
Problem
Pouch-type secondary batteries lack a reference point for accurate dimension measurement, leading to measurement errors.
Innovation Solution
A fluorescent marker is applied to the outer surface of the pouch, emitting fluorescence under ultraviolet irradiation, serving as a reference point for dimension measurement using a laser measurement unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no reference point is provided on the pouch, then the battery structure remains simple, but measurement error occurs and measurement precision deteriorates
Solution Approach 1:
A fluorescent reference marker is pre-applied to the outer surface of the pouch at a specific position before measurement. This preliminary action establishes a fixed reference point that enables accurate dimension measurement without requiring complex measurement systems or procedures during the actual measurement process.
Solution Approach 2:
The fluorescent reference marker acts as an intermediary element between the measurement system and the pouch. It provides a distinct, easily detectable reference point that mediates the measurement process, allowing the laser measurement unit to accurately determine dimensions by referencing the marker's known position on the pouch surface.
2Measurement precision
If a fluorescent marker is applied to the pouch, then measurement precision improves, but manufacturing complexity increases
Solution Approach 1:
The fluorescent reference marker is applied during the battery manufacturing process as a preliminary step before final assembly. This timing allows the marker to be integrated into the production line without requiring separate post-manufacturing operations, minimizing additional manufacturing complexity while ensuring the marker is in place before the battery is sealed.
Solution Approach 2:
The fluorescent marker material and its application method can be optimized to match existing manufacturing parameters. By selecting fluorescent materials and application techniques that are compatible with current pouch sealing and assembly processes, the manufacturing complexity increase is minimized while achieving the desired 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
The solution allows for precise measurement of the secondary battery's dimensions, reducing measurement errors and enabling easy analysis of tolerance variations.
Implementation Method 1
a fluorescent reference marker applied to a portion of an outer surface of the pouch and comprising a fluorescent material, wherein the fluorescent reference marker emits fluorescence when an electromagnetic wave is irradiated
Implementation Method 2
a laser measurement unit irradiating/receiving laser light to/from the pouch to measure the dimension of the secondary battery on the basis of the fluorescent reference marker that fluoresces to be detected
Data Source
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AI summary
The present invention relates to a secondary battery and an apparatus and method for measuring a dimension of the secondary battery. The secondary battery according to the present invention comprises: an electrode assembly in which an electrode and a separator are alternately laminated to be combined with each other; a pouch accommodating the electrode assembly therein; and a fluorescent reference marker applied to a portion of an outer surface of the pouch and comprising a fluorescent material, wherein the fluorescent reference marker emits fluorescence when an electromagnetic wave is irradiated so that the fluorescent reference marker serves as a reference point for measuring a dimension of the secondary battery.