Solar-Powered Portable Terminal Battery Charging Temperature Control
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Solution Overview
Problem
Portable terminals with solar cells cannot control battery charging temperature when powered off, leading to potential battery damage and reduced lifespan due to continuous charging without temperature sensing.
Innovation Solution
An apparatus and method that includes a controller and charging management unit to sense battery temperature and generate a booting signal using solar light, allowing the portable terminal to automatically power on and control charging, preventing battery damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the portable terminal charges the battery using solar power while powered off, then the charging function can operate continuously, but the charging temperature cannot be sensed and controlled, leading to battery damage and reduced lifespan
Solution Approach 1:
The charging management unit performs preliminary temperature sensing and evaluation before continuous charging proceeds. By sensing the battery temperature at the beginning of the charging process and evaluating whether it exceeds the threshold, the system prevents unsafe charging before damage can occur, enabling continuous operation while maintaining battery safety
Solution Approach 2:
The charging management unit implements a feedback mechanism by continuously monitoring battery temperature during charging and using this information to control the charging process. When the temperature exceeds the threshold, the system adjusts or stops charging, creating a closed-loop control that maintains battery safety while enabling continuous charging operation
2Reliability
If the portable terminal uses a separate charging management unit to sense battery temperature, then battery safety is improved, but the device complexity increases
Solution Approach 1:
The charging management unit is designed to perform multiple functions: it manages the solar charging process, senses battery temperature, evaluates charging safety, and controls the charging operation. By consolidating these functions into a single multi-functional unit rather than separate components, the system improves battery safety while minimizing the increase in device 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
Enhances charging performance by enabling temperature monitoring and controlled charging, thereby extending battery life and preventing damage during solar-powered charging when the terminal is off.
Implementation Method 1
portable terminals with solar cells are being introduced that employ solar power to charge the battery
Data Source
AI summary
A method for charging in a portable terminal is provided. The method includes charging a battery of an electronic device, using a natural resource, monitoring a charging state of the battery, and booting the electronic device based at least in part on the charging state and a determination that the electronic device is powered off.