AC Charging System for Battery Polarization and Heat Reduction
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Solution Overview
Problem
As mobile terminal power adapters experience increased power demands, they often lead to battery polarization and temperature rise, reducing battery life and reliability, and require larger, more costly designs due to the need for high-power components and electrolytic capacitors to stabilize AC power conversion to DC.
Innovation Solution
A charging system and method that outputs a second AC waveform directly to the battery, using a rectification unit, transformer, synthesis unit, and modulation and control unit to modulate the pulsating waveform, eliminating the need for electrolytic capacitors and allowing for miniaturization and cost reduction while reducing lithium precipitation and arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power of the power adapter is increased to meet higher power demands, then the charging speed and power delivery capability are improved, but the battery polarization resistance increases and temperature rises, reducing battery life and reliability
Solution Approach 1:
The patent changes the fundamental parameter of output waveform from DC to AC, allowing the battery to be charged with AC power directly. This parameter change enables the battery to handle higher power loads without excessive polarization and temperature rise, as the alternating current allows periodic relaxation of the battery chemistry, thereby maintaining battery life and reliability even at higher power levels
Solution Approach 2:
The AC waveform provides periodic action where the current direction reverses cyclically. This periodic reversal allows the battery to experience intervals of charging and discharging at the cellular level, preventing continuous polarization buildup and heat accumulation that occur with DC charging, thus enabling higher power delivery without compromising battery health
2Stability of the object's composition
If conventional power adapters use electrolytic capacitors to stabilize AC power conversion to DC, then the power supply stability is improved, but the device size and production cost increase
Solution Approach 1:
The patent extracts and removes the electrolytic capacitors from the power adapter design. By eliminating these large, costly components through the innovation of using AC output instead of DC conversion, the power adapter achieves significant size reduction and cost reduction while maintaining functional stability through the alternative AC charging approach
Solution Approach 2:
Instead of converting AC to DC as in conventional designs, the patent inverts the approach by outputting AC directly to charge the battery. This inversion eliminates the need for large filtering capacitors that are essential in DC conversion circuits, thereby achieving miniaturization without sacrificing power supply stability
3Duration of action of stationary object
If conventional power adapters use electrolytic capacitors to maintain stable electricity supply during AC power troughs, then the continuity of power supply is improved, but the production cost and manufacturing difficulty increase
Solution Approach 1:
The patent removes electrolytic capacitors from the circuit, eliminating the need for complex manufacturing processes associated with handling and integrating these sensitive components. This extraction simplifies the manufacturing workflow, reduces production costs, and lowers manufacturing difficulty while maintaining power supply continuity through the AC charging mechanism
4Reliability
If the power adapter outputs stable DC power to charge the battery, then the charging reliability is improved, but the battery polarization effect increases and charging interface arcing occurs
Solution Approach 1:
The patent changes the output parameter from DC to AC, fundamentally altering how power is delivered to the battery. The AC waveform's periodic nature prevents continuous polarization buildup and reduces arcing at the charging interface by allowing periodic reversal of current flow, thereby eliminating harmful effects while maintaining charging reliability through controlled AC power delivery
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
The solution enables quick, reliable, and safe battery charging by reducing polarization, heat emission, and prolonging battery and charging interface life, while simplifying the power adapter design and reducing costs.
Implementation Method 1
a first rectification unit configured to rectify an input AC and output a voltage of a first pulsating waveform
Implementation Method 2
the transformer is configured to convert the voltage of the modulated first pulsating waveform to the voltages of the multiple pulsating waveforms
Data Source
AI summary
A charging system, a charging method, and a power adapter are provided. The power adapter includes a battery, a first rectification unit, a transformer, a synthesis unit, a first charging interface, a sampling unit, and a modulation and control unit. The modulation and control unit is configured to modulate a voltage of a first pulsating waveform according to a voltage sampling value obtained by the sampling unit, such that a second AC output from the synthesis unit meets charging requirements.