Battery Cell Electrode Matrix for Fast Foreign Material Localization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for identifying foreign materials in low-voltage battery cells are time-consuming and have a low probability of accurately locating the cause of leakage current, leading to fatigue and potential information loss during analysis.
Innovation Solution
An apparatus comprising first and second measurement electrodes with unit electrodes arranged in a matrix, a current measuring device, and a data processing part to measure and analyze leakage current data, allowing for the quick and accurate detection of foreign material locations within low-voltage battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection and manual sampling methods are used to identify foreign materials, then the analysis process can be performed with simple equipment, but the analysis time is excessively long and the probability of finding actual leakage causes is low
Solution Approach 1:
The patent replaces manual visual inspection and mechanical sampling methods with an automated electrical measurement system. The system uses leakage current measurement through unit electrodes to automatically detect foreign material locations, substituting human visual analysis with electrical field-based detection that provides both higher precision and faster results.
Solution Approach 2:
The patent introduces leakage current as an intermediary parameter to indirectly detect foreign material locations. Instead of directly observing or sampling foreign materials, the system measures leakage current patterns that reveal the presence and location of foreign objects, enabling non-contact, rapid detection without physical sampling.
2Measurement precision
If HI-POT test with high voltage is applied to locate foreign materials, then the location of potential short-circuit can be identified, but information loss occurs due to explosive power and specimen damage
Solution Approach 1:
The patent changes the measurement parameter from high voltage (HI-POT test) to low voltage leakage current measurement. This parameter change allows for accurate foreign material location detection while avoiding the destructive explosive forces that damage specimens in high-voltage tests, thereby maintaining specimen integrity and reliability.
Solution Approach 2:
The patent applies preliminary low-voltage leakage current measurement before any high-voltage testing. This preliminary detection identifies foreign material locations and potential issues without causing damage, preventing the need for subsequent destructive HI-POT tests that would compromise specimen integrity.
3Device complexity
If manual visual confirmation of foreign materials is performed, then no complex measurement equipment is needed, but operator fatigue accumulates and detection efficiency is low
Solution Approach 1:
The patent enables the measurement system to automatically detect and locate foreign materials without requiring manual visual inspection. The unit electrodes and data processing system perform the detection task autonomously, eliminating operator fatigue and significantly improving detection efficiency while maintaining manageable equipment complexity through standardized electrode arrays.
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 apparatus effectively reduces analysis time and enhances accuracy in locating foreign materials, thereby improving the efficiency and reliability of identifying the cause of low-voltage defects in battery cells.
Implementation Method 1
a first measurement electrode and a second measurement electrode disposed on a positive electrode and a negative electrode of a battery cell to be evaluated, respectively, to measure a leakage current
Data Source
AI summary
An apparatus for detecting the location of a foreign material of a low-voltage battery cell includes a first and second measurement electrodes respectively on a positive electrode and a negative electrode of the battery cell to measure a leakage current; a current measuring device to measure a leakage current; and a data processor to process a measured leakage current data. The first and second measurement electrodes each have a structure in which a plurality of unit electrodes to which coordinate information is assigned are collected. The current measuring device measures a leakage current flowing through the unit electrode of the first measurement electrode and the unit electrode of the second measurement electrode that have the same coordinate information. The data processing part checks the location of a foreign material from a leakage current data through a coordinate information of a unit electrode having a large leakage current.