NFC Antenna Power Harvesting for Battery Charge Control
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Solution Overview
Problem
Conventional electronic devices with solar and wireless charging systems face inefficiencies, particularly in low sunlight conditions and frequent battery charging which can shorten battery life.
Innovation Solution
An electronic device with an NFC-based power conversion system that controls battery charging using a processor to determine conditions and efficiently utilize surplus electrical power from NFC data communication, integrating solar and wireless charging methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solar charge system is used, then battery can be charged by sunlight, but charging amount is low in cloudy conditions and user must find sunlight location when battery is depleted
Solution Approach 1:
The patent combines solar charging system with NFC wireless charging system into a single electronic device. The antenna for NFC communication is configured to convert magnetic fields to electrical power, creating a hybrid charging system that merges two different power sources (solar and NFC) to resolve the limitation of relying solely on solar charging.
Solution Approach 2:
The antenna serves dual functions: it acts as an NFC communication antenna for data exchange and simultaneously functions as a power reception antenna for wireless charging. This multi-functionality allows the device to charge through NFC magnetic fields when solar power is insufficient, eliminating the need for users to search for sunlight locations.
2Use of energy by moving object
If wireless charge system using NFC surplus power is used, then battery can be charged during NFC communication, but frequent charging may shorten battery life
Solution Approach 1:
The processor determines whether a predetermined condition is satisfied before controlling battery charge by NFC power. This feedback mechanism monitors battery state and charging conditions, enabling intelligent control that prevents excessive or inappropriate charging cycles, thereby protecting battery life while still utilizing NFC surplus power for charging when appropriate.
Solution Approach 2:
The system uses only the surplus electrical power available during NFC communication for charging, rather than forcing full wireless charging. This partial action approach utilizes excess power that would otherwise be wasted, providing additional charging capacity without overloading the battery or requiring dedicated wireless charging infrastructure.
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 efficiently manages battery charging, preventing frequent depletion and extending battery life by optimizing power usage from both solar and NFC sources.
Implementation Method 1
an antenna which is used for near field communication and converts to electrical power a magnetic field generated when near field communication is performed with an external device
Data Source
AI summary
An electronic device including an antenna which is used for near field communication and converts to electrical power a magnetic field generated when near field communication is performed with an external device, a battery which is chargeable by at least part of the electrical power, and a processor which determines whether or not a predetermined condition has been satisfied, and controls charge of the battery by the part of the electrical power on basis of a result of the determination.