Solar Supercapacitor Hysteresis Control for IoT Power Stability
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Solution Overview
Problem
Solar supercapacitor power supplies face issues with incomplete bootup and operation due to rapid discharge exceeding slow charging, leading to repeated cycles of partial activation and failure to maintain continuous operation in IoT devices with high power consumption.
Innovation Solution
An automatic control method and device that manages hysteresis charge and discharge by switching between pure charging and power supply states based on capacitor voltage thresholds, ensuring efficient discharge only when sufficient energy is stored and preventing over-discharge, utilizing a charge and discharge managing module with electronic switches to control the solar panel and supercapacitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If solar supercapacitor power supply charges the capacitor quickly to activate equipment, then the equipment can start faster, but the capacitor discharges too rapidly causing incomplete operation and repeated charge-discharge cycles
Solution Approach 1:
The system performs preliminary charging to accumulate sufficient energy before equipment activation. The control module monitors capacitor voltage and only enables equipment operation when the voltage reaches a predetermined threshold ensuring adequate energy storage for complete operation cycles.
Solution Approach 2:
The control module continuously monitors capacitor voltage and provides feedback to regulate the charge-discharge process. Based on real-time voltage measurements, the system adjusts charging current and prevents discharge when voltage falls below operational thresholds, avoiding incomplete operation cycles.
2Productivity
If the capacitor voltage threshold for discharge is set low to maximize power utilization, then more solar energy can be converted to power, but the equipment cannot complete full bootup and operation
Solution Approach 1:
The system dynamically adjusts the discharge voltage threshold parameter based on equipment power requirements. The control module calculates the minimum voltage needed for complete equipment operation and sets the discharge threshold accordingly, ensuring sufficient energy availability while maximizing solar power utilization.
3Reliability
If the capacitor is continuously charged without discharge control, then the capacitor can maintain high voltage, but the system cannot provide power when equipment needs to operate
Solution Approach 1:
The system dynamically switches between charging and discharging modes based on real-time voltage thresholds and equipment operational state. The control module enables discharge when voltage exceeds the upper threshold and equipment requires power, and switches to charging when voltage falls below the lower threshold, creating a dynamic balance between voltage stability and power supply capability.
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
Achieves automatic start and stop control of the solar power supply, ensuring continuous operation by coordinating charge and discharge, preventing system failure and maximizing solar power utilization, even under unstable environmental conditions.
Implementation Method 1
the solar panel is configured to generate a current for charging the supercapacitor
Implementation Method 2
the supercapacitor is configured to store power
Data Source
AI summary
An automatic control method and device for a solar supercapacitor power supply, including: obtaining a current state of a power supply device and a capacitor voltage of an energy storage element; if the capacitor voltage exceeds an initial discharge voltage in a pure charging state, the power supply device switches to a power supply state and begins to discharge; if the power supply device has been switched to the power supply state and the capacitor voltage is lower than the termination discharge voltage, the power supply device is switched to the pure charging state wherein, the initial discharge voltage is higher than the termination discharge voltage, and a charge and discharge with hysteresis effect is achieved. The method and device provided by the disclosure can achieve the charge and discharge with hysteresis effect of the power supply device.