Solar Battery Charge Control via Temperature Monitoring
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Solution Overview
Problem
Portable terminals equipped with solar batteries face the risk of battery damage due to continuous charging at high temperatures, as they lack a mechanism to stop charging in such conditions.
Innovation Solution
Incorporating a thermistor and comparator circuit that monitors temperature changes, activating or deactivating the charging unit based on a preset reference temperature to prevent battery charging when temperatures exceed a safe threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the portable terminal continues charging the battery using solar energy, then the battery capacity is maintained or increased, but the battery can be damaged or performance can be lowered in high temperature state
Solution Approach 1:
The patent implements a feedback control mechanism where a temperature sensor continuously monitors the battery temperature and feeds this information to a control unit. The control unit adjusts the charging process based on the temperature feedback, stopping or reducing charging when the temperature exceeds a predetermined threshold, thus preventing battery damage while maintaining charging efficiency under normal conditions
Solution Approach 2:
The patent changes the operating parameters of the charging system based on temperature conditions. When temperature is within the safe range, normal charging parameters are used. When temperature exceeds the threshold, the system changes parameters by stopping or reducing the charging current, thereby adapting the charging process to temperature conditions and preventing battery damage
2Reliability
If the portable terminal adds temperature monitoring and control mechanisms, then the battery safety is improved, but the device complexity increases
Solution Approach 1:
The patent implements a self-service control mechanism where the system automatically monitors its own temperature and autonomously adjusts the charging process without requiring external intervention. The control unit uses simple comparison logic to determine whether to continue or stop charging based on temperature readings, making the system self-regulating while minimizing complexity
Solution Approach 2:
The patent extracts only the essential temperature monitoring and control functions needed for battery safety, rather than implementing a comprehensive thermal management system. By taking out only the critical temperature threshold detection and charging control functions, the system achieves adequate safety protection with minimal added complexity
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
Prevents battery damage by blocking charging when temperatures rise above a reference point, ensuring safe operation and extending battery lifespan.
Implementation Method 1
a solar battery converting a solar energy into an electrical energy
Implementation Method 2
a thermistor in which a resistance value changes according to a temperature change
Data Source
AI summary
Provided is an apparatus for controlling charging of a portable terminal equipped with a solar battery that converts solar energy into an electrical energy, the apparatus including a thermistor in which a resistance value changes according to a temperature change; a comparator which outputs a first signal when a temperature surrounding the thermistor is less than a preset reference temperature as determined by the resistance value change of the thermistor according to the temperature change and outputs a second signal when the temperature is at least the preset reference temperature or more; and a charging unit which is activated and receives the electrical energy from the solar battery to charge a battery when the first signal is inputted from the comparator, and is deactivated and blocks the charge of battery in case the second signal is inputted.