Portable Device Charging Current Control via Temperature Feedback
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Solution Overview
Problem
Portable devices experience increased heat generation during high energy-consumption tasks and charging, leading to discomfort due to limited heat dissipation, necessitating a method to control charging current and manage temperature effectively without additional heat dissipating components.
Innovation Solution
A portable device comprising a battery unit, charger circuit, detecting unit, and processing unit that adjusts the charging current based on instantaneous operating and charging currents, as well as system temperature, using control signals to maintain optimal temperature levels by adjusting the charging current between minimum and maximum values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the portable device performs high energy-consumption tasks and charging simultaneously, then the device functionality is enhanced, but the temperature rises substantially causing user discomfort
Solution Approach 1:
The patent implements dynamic adjustment of charging current based on real-time temperature monitoring. The processing unit continuously monitors temperature and dynamically modifies the charging current magnitude, reducing it when temperature exceeds thresholds and maintaining higher levels when temperature is acceptable, thereby balancing functionality and thermal management
Solution Approach 2:
The patent changes the electrical parameter (charging current) in response to temperature conditions. By adjusting the charging current magnitude based on temperature feedback, the system modifies operational parameters to prevent excessive heat accumulation while maintaining device functionality
2Temperature
If additional heat dissipating components are added to the portable device, then temperature control is improved, but the device volume increases
Solution Approach 1:
The patent employs a self-regulating thermal management system where the device monitors its own temperature and automatically adjusts charging current without external intervention or additional active cooling components. The system uses built-in temperature sensors and processing units to self-manage thermal conditions
Solution Approach 2:
The patent implements a feedback control mechanism where temperature sensors continuously monitor system temperature and feed this information to the processing unit, which then adjusts the charging current accordingly. This closed-loop feedback system enables effective temperature control without requiring additional heat dissipation hardware
3Productivity
If the charging current is increased to charge the battery unit, then charging speed is improved, but heat production increases
Solution Approach 1:
The patent dynamically adjusts charging current based on real-time temperature conditions. When temperature is within acceptable ranges, the system maintains higher charging current for fast charging. When temperature approaches thresholds, the system automatically reduces charging current to limit heat generation, creating a dynamic balance between charging speed and thermal management
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
Effectively controls temperature by dynamically adjusting the charging current, reducing heat buildup and enhancing user comfort without requiring additional heat dissipation components, thereby optimizing device performance during high energy tasks and charging.
Implementation Method 1
The detecting unit is configured to detect and obtain an instantaneous operating current, an instantaneous charging current and a system temperature in the portable device
Implementation Method 2
the processing unit is configured to provide the first control signal according to the instantaneous operating current, the instantaneous charging current and the system temperature
Implementation Method 3
heat produced by chips for performing these tasks transfers to light-emitting elements, batteries or other electronic elements thereof via a printed circuit board, thus raising the temperature of the portable device
Data Source
AI summary
A portable device is provided. The portable device includes a battery unit, a charger circuit, a detecting unit and a processing unit. The charger circuit provides a charging current to charge the battery unit according to an input power and adjusts the charging current to a charging value according to a first control signal. The detecting unit detects and obtains an instantaneous operating current, an instantaneous charging current and a system temperature in the portable device. The processing unit provides the first control signal according to the instantaneous operating current, the instantaneous charging current and the system temperature.