Pouch Battery Sealing Gap Measurement Using Optical Reference Surfaces
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Solution Overview
Problem
Existing methods for measuring the sealing gap between the electrode assembly accommodation part and the sealing part of a pouch-type secondary battery are inaccurate due to variations in operator measurements and equipment limitations, leading to potential defects in the sealing process.
Innovation Solution
A device comprising a first measurement device to acquire the inner and outer start points of the sealing part, an origin point structure with vertical and horizontal reference surfaces, and a controller to calculate the sealing gap based on measured distances, ensuring accurate determination of the sealing gap width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a steel ruler is used to measure the sealing gap, then the measurement process is simple and easy to operate, but the measured value varies depending on the number of measurements or each operator, resulting in low measurement precision
Solution Approach 1:
The patent replaces the manual mechanical measurement system (steel ruler) with an automated optical measurement system using lasers and sensors. The laser measurement device emits laser beams that are detected by sensors to automatically calculate the sealing gap, eliminating human error and subjectivity while maintaining ease of operation through automated processing.
Solution Approach 2:
The patent introduces a laser beam as an intermediary between the measurement device and the sealing gap. The laser beam serves as a precise reference line that intersects with the sealing gap, allowing for accurate measurement without direct physical contact. The intersection point of the laser beam with the sealing gap edges provides objective measurement data.
2Device complexity
If manual measurement methods are used, then the device complexity is low, but the measurement precision and reliability are insufficient
Solution Approach 1:
The patent replaces simple mechanical measurement tools with an automated optical measurement system comprising laser emission units, detection sensors, and a controller. This system uses laser beams and optical detection to automatically measure the sealing gap, eliminating human error and ensuring consistent, reliable measurements across different operators and measurements.
Solution Approach 2:
The patent implements a feedback mechanism where the controller receives measurement data from the sensors, processes the information, and outputs the sealing gap measurement results. The system can compare measured values with predetermined standards and provide feedback on whether the sealing gap meets requirements, ensuring measurement reliability and consistency.
Data Source
AI summary
A device for measuring a sealing gap for a secondary battery, includes: a first measurement device, an origin point structure, a second measurement device and a controller. The first measurement device acquires an inner start point and an outer end point of the sealing part. The origin point structure has a vertical reference surface corresponding to a point moved by a predetermined first distance (X1) in a direction of the electrode assembly accommodation part from a first reference origin point (O1) disposed between the inner start point and the outer end point. The second measurement device acquires a second distance (X2) from the vertical reference surface to the electrode assembly accommodation part. The controller acquires the sealing gap based on the first distance (X1), the second distance (X2), and a third distance (X3) from the inner start point to the first reference origin point (O1).