Solar Charging Control System with Dual Interrupter Paths
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Solution Overview
Problem
Conventional charging control systems for secondary batteries from solar batteries experience power loss due to continued current flow after the charging path is interrupted, leading to unnecessary discharge of the secondary battery.
Innovation Solution
A charging control system with a first interrupter that stops power flow from the solar battery to the secondary battery when the solar battery's voltage is lower than the secondary battery's voltage, and a second interrupter that ceases operation when the solar battery's voltage drops below a predetermined level, preventing further discharge through the second path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a switching element is used to interrupt the charging path when the solar battery voltage is lower than the secondary battery voltage, then the secondary battery is protected from discharging through the solar battery, but current continues to flow through the second path causing power loss
Solution Approach 1:
The charging control system is divided into two separate paths: a first path for normal charging operation and a second path for voltage sensing and control. By segmenting the control function into a separate comparison unit that monitors voltage differences, the system can interrupt the first path while maintaining control capability, thereby preventing power loss through the second path without requiring complex additional components.
Solution Approach 2:
A comparison unit is introduced as an intermediary component that compares the voltage of the solar battery with the voltage of the secondary battery. This intermediary device enables intelligent control by generating signals to interrupt the charging path only when necessary, preventing both over-discharge and unnecessary power loss while maintaining system simplicity.
2Loss of energy
If the charging path is interrupted to prevent secondary battery discharge, then power loss is reduced, but the system requires additional control mechanisms
Solution Approach 1:
The comparison unit operates autonomously to monitor voltage conditions and automatically control the switching element. The system serves itself by using the voltage difference between the solar battery and secondary battery to generate control signals, eliminating the need for external control mechanisms or complex additional components while effectively preventing power loss.
3Loss of energy
If voltage comparison control is implemented to prevent power loss, then energy efficiency is improved, but measurement precision requirements increase
Solution Approach 1:
The voltage comparison and control function is implemented using electronic circuitry rather than mechanical measurement devices. The comparison unit uses electrical signals to detect voltage differences and control the switching element, providing sufficient precision for the application without requiring complex mechanical measurement systems or high-precision instruments.
Data Source
AI summary
A charging control system for charging a secondary battery from a solar battery, including a first path for transmitting power from the solar battery to the secondary battery, a second path for sensing the voltage of the secondary battery, and a comparison unit for comparing the solar battery voltage with the sensed voltage of the secondary battery. The first path includes a first interrupter, controlled by the comparison unit, which interrupts the first path to prevent discharge of the secondary battery through the solar battery when the solar battery voltage falls below the secondary battery voltage. The second path includes a second interrupter that interrupts the second path after the first path is interrupted, to prevent the secondary battery from discharging through the second path when not being charged through the first path.