Wireless Power Receiver With Alternating Energy Storage
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Solution Overview
Problem
Existing wireless power receiving apparatuses face inefficiencies in energy transfer due to limited capacity of batteries and the need for improved management of energy storage and transmission in near-field wireless power transmission systems.
Innovation Solution
A wireless power receiving apparatus with a receiving resonator, a resonant converter, and a controller that alternates energy storage between multiple energy storage devices, optimizing energy transfer by controlling connections and switching between the resonator and converter to maximize efficiency and adapt to peak voltage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If energy is continuously accumulated in a single energy storage device, then the device capacity requirement increases, but the energy transfer efficiency decreases due to battery limitations and charging/discharging losses
Solution Approach 1:
The patent divides the single energy storage function into multiple energy storage devices (first and second energy storage devices) that operate in alternating cycles. This segmentation allows one device to charge while the other discharges, reducing the capacity requirement for each individual device while maintaining continuous power supply and improving overall energy transfer efficiency.
Solution Approach 2:
The patent implements periodic alternating operation between two energy storage devices. The controller alternates the charging and discharging cycles between the first and second energy storage devices, allowing one to accumulate energy while the other supplies power to the resonant converter. This periodic action prevents deep discharge cycles, reducing energy losses and extending battery life.
2Device complexity
If a single energy storage device is used for both charging and power supply, then the device structure is simple, but the energy transfer efficiency decreases due to simultaneous charging and discharging conflicts
Solution Approach 1:
The patent segments the energy storage function into two separate devices, allowing independent optimization of charging and discharging operations. The first energy storage device is dedicated to charging during its cycle, while the second device handles discharging to the resonant converter, eliminating the conflicts inherent in single-device simultaneous charging and discharging.
Solution Approach 2:
The controller acts as an intermediary that coordinates the alternating operation between the two energy storage devices and the resonant converter. It manages the switching and timing to ensure one device charges while the other discharges, optimizing energy transfer efficiency without requiring complex hardware modifications to the energy storage devices themselves.
3Device complexity
If energy storage and transfer operations are performed simultaneously in the same device, then the system structure is simplified, but energy losses increase during peak voltage conditions
Solution Approach 1:
The patent employs periodic alternating operation where the first energy storage device charges during one cycle while the second device discharges to the resonant converter during the same period. This time-division multiplexing separates the charging and discharging operations, avoiding peak voltage conflicts and reducing energy losses without requiring complex voltage regulation circuitry.
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
Enhances energy transfer efficiency by alternating energy storage and transmission between multiple devices, improving overall power delivery and reducing losses, regardless of the load, thereby extending battery life and improving system performance.
Implementation Method 1
a receiving resonator configured to wirelessly receive energy... a first inductor to wirelessly receive the energy through resonant inductive coupling
Implementation Method 2
a resonant converter configured to transfer, to an output end of the wireless power receiving apparatus, energy of an energy storage device
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A wireless power receiving apparatus includes a receiving resonator configured to wirelessly receive energy; a resonant converter configured to transfer, to an output end of the wireless power receiving apparatus, energy of an energy storage device connected among a plurality of energy storage devices; and a controller configured to accumulate, alternatingly in the energy storage devices, the energy received, and select the energy storage device to be connected to the resonant converter from the energy storage devices.