Switch Mode Battery Charger Dynamic Voltage Tracking
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Solution Overview
Problem
Existing switch-mode battery chargers for mobile devices face challenges in maintaining optimal battery charging conditions, leading to inefficient power conversion and extended charge times due to variations in adapter driving capability and load conditions.
Innovation Solution
A battery charging system that includes an adapter generating a narrow reference voltage range around a preferred adapter voltage, which is tracked by the battery charger to maintain efficient battery charging, ensuring the battery is charged with preferred charging power by dynamically adjusting the adapter output voltage based on load variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a switch-mode battery charger is used to achieve higher efficiency, then energy conversion efficiency is improved, but the ability to maintain optimal charging conditions under varying load conditions deteriorates
Solution Approach 1:
The patent implements a feedback control system that continuously monitors the adapter output voltage and adjusts the charging parameters accordingly. The system detects variations in adapter driving capability and dynamically adjusts the charging current and voltage to maintain optimal charging conditions, thereby resolving the contradiction between high efficiency and reliability under varying load conditions.
Solution Approach 2:
The patent employs dynamic adjustment of charging parameters based on real-time monitoring of adapter output characteristics. The charging system transitions from static to dynamic operation, continuously adapting the charging profile to match the actual adapter capabilities and load conditions, thus maintaining both high efficiency and optimal charging conditions.
2Productivity
If the adapter is overdriven to increase charging power, then charging speed is improved, but adapter output voltage stability deteriorates
Solution Approach 1:
The system continuously monitors adapter output voltage and provides feedback control to prevent overdriving. When the adapter approaches its maximum capability, the system automatically adjusts the charging parameters to maintain voltage stability, thus achieving both fast charging and voltage stability through closed-loop control.
Solution Approach 2:
The patent dynamically changes charging parameters (current, voltage, power) based on real-time adapter performance monitoring. By adjusting these parameters within optimal ranges, the system achieves fast charging without compromising adapter output voltage stability, resolving the contradiction between charging speed and stability.
3Stability of the object's composition
If the adapter is insufficiently driven to maintain voltage stability, then voltage stability is improved, but charging power deteriorates
Solution Approach 1:
The system dynamically adjusts the charging power level based on real-time adapter performance. Rather than using a fixed conservative power level, the system continuously adapts the charging parameters to maximize power transfer while maintaining voltage stability, thus resolving the contradiction between stability and charging power.
Solution Approach 2:
The patent implements dynamic parameter adjustment to optimize the balance between voltage stability and charging power. By continuously monitoring adapter output characteristics and adjusting charging parameters accordingly, the system achieves both stable voltage operation and high charging power, eliminating the need to compromise between these two parameters.
4Productivity
If a narrow reference voltage range is used to maintain preferred charging condition, then charging efficiency is improved, but the system's adaptability to adapter variations deteriorates
Solution Approach 1:
The system uses feedback control to maintain the adapter output voltage within the narrow reference voltage range while simultaneously monitoring adapter variations. When adapter characteristics change, the system automatically adjusts the charging parameters to keep the voltage within the optimal range, thus achieving both high charging efficiency and adaptability to adapter variations.
Solution Approach 2:
The patent implements dynamic tracking of the reference voltage range, allowing the system to adapt to different adapter characteristics while maintaining operation within the optimal voltage range. The narrow reference range is dynamically adjusted and tracked based on actual adapter performance, resolving the contradiction between charging efficiency and adaptability.
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
This approach enhances battery charge rate and reduces charge time by maintaining the battery within the preferred charging condition, ensuring efficient power conversion and stable adapter output, even with varying load conditions.
Implementation Method 1
an external AC-DC adapter is coupled to a wall outlet, and converts an alternative-current (AC) power of 100-240V to a direct-current (DC) power supply
Implementation Method 2
The battery charger converts the DC power supply provided by the AC-DC adapter to a battery charging current
Implementation Method 3
An inductor is incorporated in the converter core to temporarily store power and release it for subsequent use
Data Source
AI summary
Various embodiments of the invention relate to a battery charging system that enhances the charge rate and reduces the charge time for a battery applied in a mobile device. The battery charging system is provided with an adapter output voltage, and generates a battery charging current to drive the battery. This adapter output voltage is controlled to vary within a reference voltage range which is narrowly controlled to include and track a preferred adapter voltage. The battery is therefore driven by the battery charging current that is associated with a preferred charging current under a preferred charging condition. The battery charging process may be completed under a condition that is substantially close to the preferred charging condition, allowing an enhanced battery charge rate and a reduced battery charge time.