Photovoltaic Weak-Current Discharge Circuit for Stable Energy Storage
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Solution Overview
Problem
The energy storage power supply is unstable and has a reduced service life due to the weak voltage output from solar panels, particularly at night or under shaded conditions, leading to continuous shutdowns and inefficiencies.
Innovation Solution
A photovoltaic weak current eliminating circuit is introduced, comprising a discharge triggering module, a locking module, and a discharge unlocking module, which control the discharge of energy from the solar panel input source based on preset voltage thresholds to prevent wastage and ensure stable operation. This circuit includes voltage-dividing units, triggering units, and switch tubes to manage the discharge process effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the energy storage power supply is activated by weak voltage output from solar panels, then the system can operate during nighttime or shaded conditions, but the power output is insufficient to support system consumption, leading to continuous shutdowns and reduced service life
Solution Approach 1:
The patent introduces a discharge control circuit as an intermediary between the solar panel and energy storage power supply. This circuit includes a discharge tube, capacitor, and resistor network that mediates the interaction between weak photovoltaic output and the power supply activation threshold, preventing direct harmful effects of weak voltage while maintaining adaptability
Solution Approach 2:
The patent implements a feedback mechanism through the discharge control circuit that continuously monitors the output voltage of the solar panel. When the voltage exceeds the activation threshold, the circuit triggers discharge; when voltage drops below the threshold, the circuit prevents further activation. This feedback loop ensures reliable operation by adapting to real-time voltage conditions
2Adaptability or versatility
If the energy storage power supply keeps being powered on and powered off continuously due to insufficient power output, then the system responds to weak voltage conditions, but the service life of the energy storage power supply is greatly reduced
Solution Approach 1:
The patent applies preliminary anti-action by using the discharge control circuit to prevent harmful repeated activation before it occurs. The circuit proactively blocks weak voltage signals that would otherwise cause continuous on-off cycling, thereby protecting the energy storage power supply from damage while still allowing operation under legitimate weak voltage conditions
3Loss of energy
If the discharge module operates continuously to discharge energy from the photovoltaic input source, then energy wastage is prevented, but the system may operate unnecessarily when voltage is insufficient
Solution Approach 1:
The patent implements dynamics by making the discharge module's operation conditional rather than continuous. The discharge control circuit dynamically adjusts the discharge state based on real-time voltage monitoring: triggering discharge when voltage exceeds the threshold and preventing discharge when voltage is insufficient, thereby optimizing energy utilization
Data Source
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AI summary
The present application relates to the technical field of power supply protection, and mainly provides a photovoltaic weak current eliminating circuit and an energy storage power supply which include a discharge triggering module, a locking module, a discharge unlocking module and a discharge module. The discharge triggering module is connected with the discharge module, the discharge unlocking module and the locking module, and all of the discharge module, the discharge triggering module and the discharge unlocking module are used for connecting with a photovoltaic input source. The discharge triggering module is configured to output a first control signal when an output voltage of the photovoltaic input source is greater than a preset voltage, so as to control the discharge module to discharge the energy of the photovoltaic input source. The locking module keeps the discharge triggering module outputting the first control signal after the discharge module operates. As such, the stability of the energy storage power supply can be improved. After the discharge module operates, the discharge unlocking module controls the discharge triggering module to output a second control signal if the output voltage of the photovoltaic input source is greater than the preset voltage, so as to stop the operation of the discharge module. As such, the utilization ratio of the photovoltaic input source can be improved.