Spacer Laminate Jig for Accurate Battery Cell Volume Measurement
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Solution Overview
Problem
Conventional methods for measuring the volume change of battery cells using Archimedes' principle are prone to inaccuracies due to water stagnation between the battery cell jig and spacer, leading to potential corrosion and biased pressure application.
Innovation Solution
A battery cell jig with a spacer laminate that includes laminated spacers with slit units along the longitudinal direction to prevent water stagnation, allowing for uniform pressure application and accurate volume measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional spacer is used to maintain separation distance in the battery cell jig, then the structure is simple and easy to manufacture, but water stagnates between the jig and spacer causing measurement inaccuracies and corrosion
Solution Approach 1:
The spacer is designed with a porous structure that allows water to pass through, preventing water stagnation between the battery cell jig and the spacer. This porous design enables accurate volume measurements by eliminating the harmful water accumulation effect while maintaining structural integrity and simplicity.
Solution Approach 2:
The spacer is divided into multiple sections with through-holes distributed throughout its structure. This segmentation allows water to flow through different pathways, effectively preventing stagnation. The segmented design achieves the dual goal of preventing water accumulation and maintaining measurement accuracy without significantly increasing complexity.
2Measurement precision
If bolts are fastened to secure the battery cell in the jig, then the cell is firmly held for measurement, but biased pressure is applied to the cell leading to inaccurate volume measurements
Solution Approach 1:
The spacer incorporates locally distributed through-holes that allow water to escape from specific areas, creating localized pressure relief zones. This local quality modification ensures uniform pressure distribution across the battery cell surface, preventing biased pressure application while maintaining secure cell holding during measurement.
Solution Approach 2:
The spacer acts as an intermediary element between the battery cell and the jig, mediating the pressure transmission. By incorporating through-holes, the spacer allows water to pass through and equalize pressure, preventing direct biased pressure application from the bolts to the cell while maintaining firm cell securing.
3Ease of manufacture
If water is used for volume measurement according to Archimedes principle, then the measurement method is simple, but water stagnation causes corrosion and measurement errors
Solution Approach 1:
The porous spacer structure allows water to pass through freely during the Archimedes principle measurement process. This prevents water stagnation and the associated corrosion problems while maintaining the simplicity of the water-based volume measurement method. The through-holes enable continuous water flow, eliminating harmful water accumulation.
Solution Approach 2:
The through-holes in the spacer extract the harmful stagnation effect from the measurement system. By providing escape pathways for water, the design removes the corrosive stagnation problem while preserving the beneficial aspects of water-based volume measurement, maintaining both simplicity and reliability.
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 enables precise measurement of battery cell volume changes by minimizing water stagnation and adjusting the spacer height to match the battery cell, ensuring accurate and non-destructive volume assessment.
Implementation Method 1
Conventionally, in order to observe the volume change of the battery cell, the volume change amount of the battery cell was measured using Archimedes principle.
Data Source
AI summary
The present technology relates to a battery cell jig including a spacer laminate, a battery cell volume measuring apparatus including the battery cell jig, and a battery cell volume measuring method performed by using the apparatus. It is possible to easily adjust a space between first and second plates where a battery cell has been interposed therebetween by including a spacer which can be assembled in the spacer laminate. Further, it is possible to preventing stagnation of water at a space between the battery cell jig and the spacer when measuring the volume change of the battery cell by including a slit unit opened along a longitudinal direction in the spacer.