Battery Separator Insulation Inspection Under Compression
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Solution Overview
Problem
Existing technologies lack a reliable method for inspecting the insulation of secondary battery separators in real-time, which is crucial for ensuring the safety and performance of secondary batteries used in devices like smartphones and electric vehicles.
Innovation Solution
An apparatus is developed that applies current or voltage between upper and lower metallic members to inspect the insulation of a separator by measuring resistance and current, utilizing a source meter connected to metallic members with ball bearings for rotation and insulating covers for safety, and resilient members for consistent pressure application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If insulation inspection is performed without applying pressure, then the inspection process is simple, but the inspection accuracy is insufficient to detect debris or pinholes
Solution Approach 1:
The apparatus applies pressure to the separator before performing insulation resistance measurement. This preliminary action of pressing the separator between upper and lower pressing members ensures that any debris or pinholes are compressed against the separator, making them detectable during the subsequent insulation measurement phase.
2Reliability
If pressure is applied during insulation inspection, then detection of debris or pinholes is improved, but the device structure becomes more complex
Solution Approach 1:
The upper and lower pressing members serve multiple functions: they apply mechanical pressure to the separator during inspection, provide electrical connection paths for the insulation measurement, and support the structural framework of the apparatus. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The apparatus combines the pressure application mechanism and the electrical measurement system into a single integrated structure. The pressing members are both mechanical components for applying force and electrical components for conducting insulation measurements, merging two functions into one component set.
3Productivity
If real-time inspection is implemented, then production efficiency is improved, but the measurement system becomes more complex
Solution Approach 1:
The apparatus enables continuous insulation inspection by maintaining constant pressure on the separator through the pressing members and continuously measuring insulation resistance. The source meter can perform measurements in real-time without interrupting the pressing action, allowing for continuous monitoring of separator quality.
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 real-time inspection of separator insulation, detecting debris or pinholes, and ensuring consistent pressure application, thereby enhancing the safety and reliability of secondary batteries.
Implementation Method 1
a source meter electrically connected to the upper metallic member and to the lower metallic member, and configured to apply a voltage and/or current between the upper metallic member and the lower metallic member, and to measure resistance and/or current between the upper metallic member and the lower metallic member corresponding to the insulation of the separator
Data Source
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AI summary
Disclosed is an apparatus for inspecting the insulation of a separator for batteries capable of inspecting the insulation of a separator in real time by applying current or voltage after pressing an upper metallic member and a lower metallic member toward each other. The apparatus includes an upper metallic member, a lower metallic member under the upper metallic member, and configured to press the separator with the upper metallic member, and a source meter electrically connected to the upper metallic member and to the lower metallic member, and configured to apply a voltage and/or current between the upper metallic member and the lower metallic member, and to measure resistance and/or current between the upper metallic member and the lower metallic member corresponding to the insulation of the separator.