Charging Device Voltage Adjusting Circuit Pulsating Direct Voltage
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Solution Overview
Problem
As mobile terminal power adapters increase in power, they often cause battery polarization and temperature rises, reducing battery service life and affecting reliability and safety, and conventional charging methods require electrolytic condensers to stabilize alternating current, increasing adapter size and cost.
Innovation Solution
A charging system using a voltage adjusting circuit with a switch unit and transformer to convert alternating current into a pulsating direct voltage, directly charging the battery, eliminating the need for electrolytic condensers and reducing polarization, heat, and improving charging speed and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging methods use electrolytic condensers to stabilize alternating current, then the charging stability is improved, but the adapter size and cost increase
Solution Approach 1:
The patent removes electrolytic condensers from the charging circuit, extracting the problematic component that caused size and cost issues while maintaining charging stability through alternative means (direct rectification and control circuitry)
Solution Approach 2:
The patent replaces the passive mechanical stabilization method (electrolytic condensers) with an active electronic control system that uses rectification and control circuits to achieve stable charging without bulky passive components
2Productivity
If power adapter power is increased to enable faster charging, then charging speed is improved, but battery polarization and temperature rise increase, reducing battery service life
Solution Approach 1:
The patent employs periodic pulsating direct voltage for charging instead of continuous high-power delivery, allowing the battery to charge in pulses with intervals that prevent excessive polarization and heat accumulation, thus maintaining battery health during fast charging
Solution Approach 2:
The patent changes the voltage delivery mode from stable continuous DC to pulsating DC with controlled parameters, where the voltage and current are modulated in a periodic manner to achieve fast charging while controlling thermal and polarization effects on the battery
3Power
If power adapter power is increased from 5W to larger power, then charging capability is improved, but the number of electronic elements increases, increasing production cost and manufacture difficulty
Solution Approach 1:
The patent removes unnecessary electronic elements such as electrolytic condensers and complex stabilization circuits from high-power charging designs, simplifying the overall structure while maintaining or improving charging capability
Solution Approach 2:
The patent designs a universal charging circuit structure that can handle multiple power levels (from 5W to higher powers) using the same basic components (rectifier, control circuit, transformer), eliminating the need for different circuit designs for different power levels and reducing overall 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
The system achieves fast charging with reduced lithium precipitation, extended battery and interface life, improved reliability, and miniaturization of the charging device by using pulsating voltage, eliminating the need for electrolytic condensers and reducing costs.
Implementation Method 1
a first rectifier (101), configured to rectify the alternating current and output a first voltage with a first pulsating waveform
Implementation Method 2
a transformer (103), configured to convert the modulated first voltage and output a second voltage with a second pulsating waveform
Data Source
Figure 1
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AI summary
The present disclosure discloses a charging device, a charging method, a power adapter and a terminal. The charging device includes a charging receiving terminal, a voltage adjusting circuit and a central control module. The charging receiving terminal is configured to receive an alternating current. The voltage adjusting circuit includes a first rectifier, a switch unit, a transformer and a second rectifier. The first rectifier is configured to rectify the alternating current and output a first voltage. The switch unit is configured to modulate the first voltage to output a modulated first voltage. The transformer is configured to output a second voltage according to the modulated first voltage. The second rectifier is configured to rectify the second voltage to output a third voltage. The voltage adjusting circuit applies the third voltage to a battery directly.