Abnormal Connection Detection in Power Transmission Cables
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Solution Overview
Problem
Conventional charging systems fail to detect abnormal connections between power suppliers and receivers, leading to undesirable heat buildup and power loss due to short circuits caused by dust or unwanted materials, which can be dangerous if not controlled.
Innovation Solution
An abnormal connection detection method that monitors the output current and its slope to determine if it exceeds predetermined thresholds, triggering power disconnection or alarm signals to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging systems are used without abnormal connection detection, then the system structure remains simple, but heat buildup and power loss occur due to undetected short circuits
Solution Approach 1:
The patent applies preliminary action by performing abnormal connection detection before normal power transmission begins. The system detects current during a preset time period after power adapter connection but before full power delivery, identifying short circuits caused by dust or unwanted materials in advance and preventing heat buildup and power loss before they occur.
2Measurement precision
If current threshold detection is implemented to identify abnormal connections, then detection accuracy improves, but false positives may occur due to normal current variations
Solution Approach 1:
The patent applies dynamics by using dual detection criteria that adapt to different time periods. During the preset detection period, the system uses both current threshold and current slope threshold criteria. After the preset time period, it continues monitoring but adjusts evaluation based on the dynamic state of the connection, reducing false positives while maintaining detection sensitivity.
Solution Approach 2:
The patent applies parameter changes by utilizing both current magnitude and current slope as detection parameters. The system evaluates whether current exceeds a first threshold OR whether current slope exceeds a second threshold during the preset time period, using multiple parameters to improve detection accuracy and distinguish abnormal connections from normal variations.
3Reliability
If continuous power monitoring is performed to detect abnormal connections, then detection reliability improves, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by performing intensive current monitoring only during a preset time period after connection, then transitioning to continued but less intensive monitoring after the preset time period. This periodic detection approach maintains high reliability during the critical initial phase while reducing energy consumption during normal operation.
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
Effectively identifies abnormal connections, preventing heat buildup and power loss by ensuring safe and controlled power transmission between power suppliers and receivers.
Implementation Method 1
the power supplier and the power receiver are connected through a cable, the cable includes positive and negative power transmission lines
Implementation Method 2
determining whether an output current generated by a power supplier is higher than a predetermined current threshold or by determining whether a slope of such output current is higher than a predetermined slope threshold
Implementation Method 3
the power receiver further includes a switch, for enabling or disabling the power receiver to receive power from the power supplier
Data Source
AI summary
An abnormal connection detection method is used between a power supplier and a power receiver. The power supplier and the power receiver are connected through a cable. The cable includes positive and negative power transmission lines. The abnormal connection detection method includes: providing an output voltage from the power supplier, wherein the output voltage is lower than a predetermined voltage threshold; detecting, according to the output voltage, whether an output current generated by the power supplier is higher than a predetermined current threshold; and when the output current is higher than the predetermined current threshold, determining that an abnormal connection occurs between the power supplier and the power receiver.