Dynamic Voltage Adjustment in Fast Charging Systems
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Solution Overview
Problem
Existing standard chargers do not fully utilize their charging capability as they maintain a fixed output voltage, regardless of the charger's output capability, leading to suboptimal charging performance.
Innovation Solution
A charging method that adjusts the output voltage of a charger based on control current waves sent by a chargeable device, using positive or negative current pulses to increase or decrease the voltage, allowing the charger to operate within its full capacity, thereby achieving fast charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charger maintains a fixed output voltage (5V), then the charging process is stable and simple to control, but the charger's output capability is not fully utilized, resulting in slow charging speed
Solution Approach 1:
The patent implements dynamic voltage adjustment by transitioning from a fixed 5V output to a variable voltage system that can switch between multiple voltage levels (5V, 9V, 12V, 20V). The charger dynamically changes output voltage based on real-time current wave detection from the chargeable device, enabling fast charging while maintaining system controllability through predefined voltage switching thresholds.
Solution Approach 2:
The patent employs feedback control by detecting current waves sent from the chargeable device to determine voltage adjustment timing. The charger monitors the current waveform characteristics (positive current pulses, negative current pulses, or zero current) and uses this feedback information to automatically switch between different output voltage levels, achieving adaptive voltage control without complex communication protocols.
2Productivity
If the charger increases output voltage to utilize full charging capability, then charging efficiency improves, but the risk of voltage mismatch and device damage increases
Solution Approach 1:
The patent implements preliminary detection action by having the chargeable device send current waves before voltage switching occurs. The charger detects these preliminary current signals to determine the appropriate voltage level to switch to, ensuring that voltage increases only after confirming device readiness. This preliminary action prevents premature high-voltage application and ensures safe charging progression.
3Power
If the charger uses multiple voltage levels for fast charging, then the output power increases, but the control system becomes more complex
Solution Approach 1:
The patent implements parameter changes by switching between discrete voltage levels (5V, 9V, 12V, 20V) rather than continuous voltage adjustment. This approach increases output power capability while maintaining relatively simple control logic based on current wave detection. The predefined voltage levels and corresponding current wave patterns simplify the control system compared to continuous analog control, achieving high power output with manageable complexity.
Data Source
AI summary
A charging method, a charging apparatus, a charger, a chargeable device, and a charging system are provided. The charging method includes: acquiring a control current wave from a chargeable device, wherein the control current wave is a positive current pulse, a negative current pulse, or a current having a current value equal to a reference current value; if the control current wave is the positive current pulse, adjusting an output voltage of a charger to be greater than a present output voltage; if the control current wave is the negative current pulse, adjusting the output voltage of the charger to be less than the present output voltage; and if the control current is the current having the current value equal to the reference current value, maintaining the output voltage unchanged. Accordingly, an output capability of the charger is fully used, thus achieving fast charging.