3D Electrode Deformation Calculation via Feature Point Identification
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Solution Overview
Problem
Conventional feature point detection methods used in fingerprint identification are not applicable for calculating the deformation of a battery electrode based on its expansion/contraction, which hinders the improvement of energy efficiency in batteries.
Innovation Solution
An expansion/contraction amount calculation device that calculates the deformation of an electrode by identifying feature points from 3D data, using a controller with a feature point identifier, coordinate generator, and calculator to compare first and second 3D data, thereby enabling the identification of feature points and calculating the expansion/contraction amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional feature point detection methods from fingerprint identification are used, then the method is simple and well-established, but it cannot be applied to calculate electrode deformation in batteries
Solution Approach 1:
The patent adapts the feature point detection methodology from fingerprint identification to electrode deformation analysis, making the technique universally applicable across different domains. The coordinate generation method and feature point identification algorithms are generalized to work with both 2D fingerprint images and 3D electrode structures, allowing a single technical approach to serve multiple measurement purposes.
Solution Approach 2:
The patent creates a virtual coordinate system that copies and maps the successful feature point detection approach from fingerprint technology onto electrode structures. By generating corresponding coordinate systems for both fingerprint ridges and electrode active material pieces, the method replicates the effectiveness of established biometric detection in a completely different application context.
2Measurement precision
If 3D data comparison is performed without feature point identification, then the calculation process is simpler, but accurate deformation measurement cannot be achieved
Solution Approach 1:
The patent performs preliminary identification of feature points (corresponding points of active material pieces) before conducting the deformation calculation. By pre-establishing the coordinate systems and identifying corresponding features in the 3D data, the method prepares the necessary reference framework in advance, enabling accurate measurement without requiring complex real-time computation during the actual deformation analysis.
Solution Approach 2:
The patent introduces coordinate systems as an intermediary framework that mediates between the raw 3D data and the deformation calculation. The coordinate systems serve as a reference medium that enables precise comparison of electrode positions before and after deformation, translating complex spatial relationships into measurable coordinate differences without requiring direct complex geometric computations.
3Measurement precision
If the electrode is non-uniform or rotated, then the expansion/contraction measurement becomes more challenging, but energy efficiency improvement requires accurate measurement in all cases
Solution Approach 1:
The patent changes the measurement parameters by establishing coordinate systems that adapt to the electrode's actual orientation and configuration. Rather than requiring the electrode to be in a standard position for measurement, the method modifies the coordinate reference framework to match the electrode's specific state, enabling accurate measurement regardless of rotation or non-uniformity.
Solution Approach 2:
The patent handles non-uniform electrode structures by treating each piece of active material independently with its own coordinate system, rather than assuming symmetry or uniformity across the entire electrode. This asymmetric approach allows accurate tracking of individual feature points even when the electrode has irregular shapes, non-uniform distributions, or rotational misalignments.
Data Source
AI summary
An expansion/contraction amount calculation device 1 calculates an amount of deformation of an electrode by calculating an amount of expansion/contraction of the electrode based on 3D data of the electrode. The expansion/contraction amount calculation device 1 includes a controller 10 including: a feature point identifier 11 configured to identify a feature point from arrangement information regarding a piece of an active material, the arrangement information being included in the 3D data; a coordinate generator 12 configured to generate, based on relative positional information regarding the feature point, a coordinate system for calculation of the amount of deformation; and a calculator 14 configured to calculate, by comparing first 3D data with second 3D data, the amount of expansion/contraction of the electrode and the amount of deformation of the electrode.