Wireless Charging Power Control via Feedback Signal
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Solution Overview
Problem
The increasing demand for higher processing capabilities in mobile communication devices leads to more complex integrated circuits that consume more battery power, making it challenging to prolong battery life and requiring high-capacity, expensive batteries that often need recharging during the day.
Innovation Solution
A method for wireless charging power control that dynamically adjusts the effective charging power by measuring and comparing it to a target power, using a battery charging signal indication to either decrease or increase the power to prevent overcharging and ensure fast charging, utilizing a wireless RF charging signal converted to a DC charging signal for lithium-ion batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless charging power is increased to enable fast charging, then charging speed is improved, but risk of overcharging damage increases
Solution Approach 1:
The patent implements a feedback control mechanism where the receiver measures the actual charging power delivered to the battery and compares it against a target charging power. Based on this comparison, the receiver sends control signals (BCSI) back to the transmitter to adjust the charging power. This closed-loop feedback system enables fast charging by allowing high power transmission while preventing overcharging damage through continuous monitoring and adjustment, directly resolving the technical contradiction between charging speed and overcharging risk.
2Reliability
If charging power is dynamically adjusted to prevent overcharging, then battery safety is improved, but charging efficiency decreases
Solution Approach 1:
The patent employs dynamic charging power adjustment where the charging power is continuously adapted based on real-time battery conditions and measured actual power delivery. The system transitions from static fixed-power charging to dynamic variable-power charging, allowing the charging power to be optimized at each moment to match battery requirements. This dynamic approach maintains battery safety through controlled power levels while minimizing energy loss by avoiding both undercharging and overcharging conditions, thus resolving the contradiction between safety and efficiency.
3Duration of action of moving object
If high-capacity batteries are used to extend battery life, then operating duration is improved, but device size and cost increase
Solution Approach 1:
The patent enables continuous optimal charging action through wireless charging technology, allowing the battery to be charged continuously without removal or physical intervention. The system maintains continuous power transfer from transmitter to receiver, with the charging process uninterrupted by user actions. This continuous charging capability extends effective battery life by enabling convenient recharging throughout the day, reducing the need for oversized batteries that would be required if charging opportunities were limited, thus resolving the contradiction between battery life and device size.
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 allows for fast charging while protecting the battery from overcharging damage, effectively extending battery life and reducing the need for frequent recharging.
Implementation Method 1
an RF power harvesting circuit converts the wireless RF charging signal to a DC charging signal
Data Source
AI summary
A method for wireless charging power control is disclosed. In a wireless charging system, a wireless radio frequency (RF) charging signal transmitted by a wireless charging station is harvested and converted to a direct-current (DC) charging signal to charge a battery. To prevent overcharging damage to the battery, an effective charging power in the DC charging signal is measured and compared to a target charging power required by the battery. A battery charging signal indication (BCSI) is provided to the wireless charging station to decrease the effective charging power if the effective charging power is greater than the target charging power, or to increase the effective charging power if the effective charging power is less than the target charging power. By dynamically adjusting the effective charging power, it is possible to provide fast charging to the battery while protecting the battery from overcharging damage.