Bus-bar Probes for Current Distribution Monitoring
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Solution Overview
Problem
In metal electrowinning or electrorefining plants, uneven current distribution among electrodes due to imperfect electrical contacts, surface irregularities, and anode wear leads to inefficiencies, quality loss, and potential short-circuiting, which is difficult to detect accurately with conventional manual or semi-manual monitoring systems.
Innovation Solution
A current collecting bus-bar with homogeneous resistivity and removable electrode housings, equipped with probes for continuous monitoring of electric potential, allowing for real-time detection of current distribution anomalies and automatic disconnection of faulty electrodes without the need for external power or manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual or semi-manual monitoring systems are used to detect current distribution, then operators can identify some irregularities, but the systems are expensive, cannot work continuously, and fail to detect small current distribution disequilibria
Solution Approach 1:
The patent extracts the monitoring function from complex external devices (infrared sensors, magnetic field detectors, Hall effect sensors) and integrates it directly into the bus bar structure itself. The bus bar becomes both the current conductor and the measurement device, eliminating the need for separate sensing systems and their associated power supplies, electronics, and external components.
Solution Approach 2:
The bus bar performs self-measurement of current distribution through integrated probes that detect potential differences along its length. The system uses the bus bar's own electrical properties (resistivity, potential distribution) to monitor current apportionment without requiring external active sensing components or external power sources for measurement.
2Duration of action of moving object
If fixed current sensors relying on Hall effect are used for continuous detection, then continuous monitoring is achieved, but the sensors require big size external power supply such as large set of batteries
Solution Approach 1:
The monitoring system uses the existing electrical current flowing through the bus bar during normal electrolysis operation to perform measurements. The probes detect potential differences created by the operational current itself, eliminating the need for separate power supplies, batteries, or external energy sources dedicated to the monitoring function.
Solution Approach 2:
The bus bar serves multiple functions simultaneously: it conducts current to the electrodes, collects measurement data through integrated probes, and provides the measurement signal using the operational current itself. This multi-functionality eliminates the need for dedicated power supply systems for monitoring.
3Measurement precision
If conventional manual elements such as gaussmeters or infrared sensors are used, then operators can locate big current distribution disequilibria, but they cannot detect small irregularities and require expensive equipment
Solution Approach 1:
The patent removes the need for expensive external detection equipment (gaussmeters, infrared sensors) by extracting the sensing function and embedding simple potential-detecting probes directly into the bus bar structure. This integration transforms the bus bar into a self-monitoring device that can detect both large and small current distribution variations.
Solution Approach 2:
The system measures potential difference (voltage) along the bus bar, which is directly related to current distribution through the bus bar's resistivity. By monitoring potential variations at different points, the system can detect current distribution irregularities with high precision using simple electrical measurements rather than complex magnetic or thermal sensing.
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 continuous, accurate monitoring and automatic correction of current distribution across thousands of electrodes, reducing production losses and extending anode lifetime while eliminating the need for expensive and hazardous manual measurements.
Implementation Method 1
probes for detecting electric potential connected to the bus-bar by securing means in correspondence of the electrical contacts established between the bus-bar and the electrodes housed thereupon
Data Source
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Figure 5a~5b
AI summary
The invention relates to a current collecting bus-bar comprising electrode housings for accommodating a multiplicity of electrodes in electrical contact therewith. Probes for measuring the electric potential locally established in correspondence of the electrical contacts during the passage of electric current are also connected to the bus-bar. The invention further relates to a permanent monitoring system allowing the continuous evaluation of current distribution on each electrode of electrolysis cells of metal electrowinning or electrorefining plants, connected to an alerting system and to means for disconnecting individual electrodes in case on non-compliance with preset values.