Power Adapter Ripple Charging for Faster Battery Charging
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Solution Overview
Problem
As mobile terminal power adapters increase in power, they often lead to increased polarization resistance and temperature of batteries, reducing service life and affecting reliability and safety, while also requiring larger sizes and higher production costs due to the need for more electronic elements and stable direct current output.
Innovation Solution
A charging system that includes a power adapter with a first rectifier, switch unit, transformer, second rectifier, sampling unit, and control unit, which outputs a voltage with a ripple waveform directly to the battery, using a high-frequency transformer to miniaturize the adapter and reduce costs, and adjusts the duty ratio of the control signal based on sampling values to meet charging requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power of the power adapter is increased to provide larger charging current, then the charging speed is improved, but the polarization resistance and temperature of the battery increase, reducing service life and affecting reliability
Solution Approach 1:
The patent implements intermittent charging by controlling the switch unit to periodically connect and disconnect the charging circuit. The control unit adjusts the duty cycle of the switching signal to provide charging current in pulses rather than continuously, allowing the battery to rest between charging intervals. This periodic action reduces cumulative polarization resistance and heat accumulation, thereby extending battery service life while maintaining acceptable charging speed through optimized pulse width and frequency
Solution Approach 2:
The patent employs dynamic control of charging parameters by the control unit, which continuously monitors battery status and adjusts the charging current magnitude and pulse duration in real-time. The switch unit dynamically modifies the charging circuit configuration based on feedback signals, enabling adaptive charging that optimizes the balance between charging speed and battery protection throughout the charging process
2Productivity
If the power of the power adapter is increased to provide larger charging current, then the charging speed is improved, but the size of the power adapter increases due to more electronic elements
Solution Approach 1:
The patent segments the charging function into discrete controllable stages through the switch unit, which divides the charging process into multiple time intervals with different current levels. This segmentation allows the use of smaller electronic components that can handle peak currents only during specific intervals rather than requiring components sized for continuous high-power operation, thereby reducing overall adapter size while maintaining high charging speed capability
Solution Approach 2:
The patent uses dynamic switching control to enable small electronic components to deliver high charging power temporarily. The switch unit rapidly transitions between different circuit configurations, allowing compact components to operate at high current levels during brief intervals rather than sustaining continuous high power, thus achieving high charging speed with reduced adapter size
3Productivity
If the power of the power adapter is increased to provide larger charging current, then the charging speed is improved, but the production cost and manufacture difficulty increase
Solution Approach 1:
The patent implements multi-functionality where the switch unit serves multiple purposes: it controls charging current magnitude, implements intermittent charging timing, provides circuit protection, and enables different charging modes. This universal component approach eliminates the need for separate expensive high-power components, allowing standard electronic elements to achieve high charging speed functionality at lower production cost and simplified manufacturing
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 solution enables miniaturization and cost reduction of the power adapter, prolongs battery service life, improves charging speed, reduces lithium precipitation and heat, and ensures safe and reliable charging by eliminating the need for electrolytic condensers and providing intermittent charging.
Implementation Method 1
a transformer (103), wherein a first end of a primary winding of the transformer is coupled to a first output end of the first rectifier
Data Source
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AI summary
The present disclosure discloses a charging method, a power adapter (1) and a computer readable storage medium. The charging method includes: performing (S1) a first rectification on an input alternating current to output a first voltage with a first pulsating waveform; performing (S2) a voltage conversion and a second rectification on the first voltage, to acquire a second voltage with a second pulsating waveform, and the second voltage being used to charge a battery in a terminal; controlling the voltage conversion according to a feedback from the terminal, to adjust a magnitude of the second voltage. The charging method is characterized by: communicating with the terminal to determine a charging mode, the charging mode comprising a first charging mode and a second charging mode, the second charging mode being configured to charge the battery in the terminal with the second voltage, the first charging mode being configured to charge the battery with a fourth voltage obtained by performing filtering on the second voltage; and when it is determined to charge the battery in the first charging mode, controlling a filter to perform the filtering on the second voltage to output the fourth voltage for charging the battery.