External Power Supply Detection via Battery Discharge Monitoring
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Solution Overview
Problem
Portable electronic devices often experience battery discharge and faulty operation due to insufficient power supply, as they continue to drain energy below the cutoff voltage when an external power supply provides inadequate power, leading to device shutdown or malfunction without clear warning indicators.
Innovation Solution
A system and method that utilize a processor to monitor battery current output, generate error indicators for discharging batteries, and display user prompts or warnings via LED or audio alerts to indicate improper power supply, allowing the device to enter standby or shutdown modes to prevent further discharge and notify users of faulty power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the device continues to operate using battery power when external power supply is insufficient, then the device can maintain operation, but the battery discharges below cutoff voltage causing damage and faulty operation
Solution Approach 1:
The system performs preliminary detection of battery current direction before the battery can discharge below cutoff voltage. By monitoring whether current is flowing into or out of the battery, the system proactively identifies insufficient power supply conditions and triggers warnings or shutdowns before damage occurs, preventing the harmful discharge scenario.
2Device complexity
If the device provides no warning when power supply is insufficient, then the system remains simple, but the user cannot distinguish between battery depletion and improper power supply
Solution Approach 1:
The system implements feedback by continuously monitoring battery current and providing real-time information about power supply status through user-visible warnings. When the monitor detects current flowing in the discharge direction during external power connection, it generates an improper power supply warning, giving the user actionable information about the actual cause of low battery conditions.
3Reliability
If the device shuts down immediately upon detecting insufficient power, then battery damage is prevented, but the device loses functionality before the user can address the power supply issue
Solution Approach 1:
The system provides preliminary warning before enforcing shutdown, allowing the user time to address the power supply issue. The improper power supply warning gives advance notice of the problem, and only after the user fails to correct it or the battery reaches critical levels does the system shut down, balancing protection with usability.
Data Source
AI summary
Systems and processes are provided to detect an improper external power supply including a battery having a battery current output, a power supply for receiving an external voltage and an external current from an external power supply and for generating a control signal in response to receiving the external voltage, a processor operative to determine a first polarity of the battery current output at a first time in response to the control signal, to generate an error indicator in response to the first polarity being indicative of a discharging battery, and a display operative to display a user warning indicative of an improper external power supply in response to the error indicator.