Microporous Terminal Contacts for Precise Electrode Resistance Measurement
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Solution Overview
Problem
Existing through-plane resistance measurement methods for electrodes suffer from poor reproducibility due to high contact resistance and uneven contact between electrodes and terminals, especially when measuring individual electrodes.
Innovation Solution
An electrode resistance measuring apparatus with microporous conductive layers on the terminals that minimize contact resistance by forming a microporous layer on the surface of the terminals in contact with the electrodes, using materials like carbon, conductive metal, or conductive polymer, and applying conductive paste to ensure uniform contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional multimeter is used to measure electrode resistance, then the measurement process is simple, but the measurement precision is insufficient due to contact resistance and resistance of the electrolyte solution
Solution Approach 1:
The patent divides the measurement process into two separate steps: first measuring the total resistance (electrode + electrolyte + contact resistance) and then measuring the electrolyte resistance separately. By subtracting the electrolyte resistance from the total resistance, the electrode resistance is obtained. This segmentation allows elimination of contact resistance effects while maintaining measurement precision.
Solution Approach 2:
The patent introduces an intermediary measurement approach by using the electrolyte resistance as a reference value. By measuring the electrolyte resistance separately and using it to compensate for the total resistance measurement, the method eliminates the influence of contact resistance and achieves precise electrode resistance measurement without requiring complex specialized equipment.
2Ease of manufacture
If the electrode is removed from the measuring device to clean or replace it, then the electrode can be maintained, but the measurement cannot be performed during this time causing loss of time
Solution Approach 1:
The patent uses the electrolyte resistance measurement as an intermediary that can be performed independently of the electrode. By measuring the electrolyte resistance through the electrode lead resistance, the system provides continuous measurement capability even when the working electrode is removed for maintenance, thus eliminating measurement interruption time.
Solution Approach 2:
The measurement system serves itself by automatically compensating for lead resistance and enabling electrolyte resistance measurement without requiring the working electrode to be present. This self-service capability allows the system to maintain measurement functionality during electrode maintenance operations.
3Measurement precision
If the electrode lead resistance is not compensated, then the measurement device is simple, but the measurement precision is reduced due to lead resistance affecting the measurement
Solution Approach 1:
The patent segments the total measured resistance into three components: electrode resistance, electrolyte resistance, and lead resistance. By measuring the electrolyte resistance separately and using it to calculate the lead resistance, the system can subtract both electrolyte and lead resistance from the total measurement to obtain accurate electrode resistance values.
Solution Approach 2:
The patent implements a feedback mechanism where the electrolyte resistance measurement is used to calculate and compensate for the lead resistance in subsequent electrode resistance measurements. This feedback loop automatically adjusts the measurement results to eliminate lead resistance effects without requiring complex additional hardware.
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 single-sheet measurement of individual electrodes with high reproducibility, reducing measured resistance values by minimizing contact resistance and improving measurement precision.
Implementation Method 1
a power supply unit for applying a potential difference between a first electrode and a second electrode, thereby generating an electric current
Data Source
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AI summary
The present invention is to provide an electrode resistance measuring device which measures the through-plane resistance of an electrode and enables single-sheet measurement for individual electrodes with high reproducibility, the device comprising: a lower terminal of which the top surface is in close contact with the bottom surface of an electrode to be measured; and a resistance measurement unit electrically connected to an upper terminal and the lower terminal so as to measure the resistance of the electrode to be measured, wherein microporous layers are formed on the bottom surface of the upper terminal and the top surface of the lower terminal.