NFC Antenna Coupling for Battery Charging
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Solution Overview
Problem
Existing methods for charging small-sized power supply batteries in portable devices, such as access badges and Bluetooth earpieces, are inefficient and costly, particularly when using wireless induction charging, which requires dedicated and expensive equipment.
Innovation Solution
A method utilizing near-field communication technology to electromagnetically couple a base station's primary antenna with a device's secondary antenna, allowing the device to modify the coupling to receive and utilize authentication request signals for battery charging, thereby leveraging existing base stations for fast and cost-effective charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless induction charging is used to charge small-sized batteries in portable devices, then charging convenience is improved, but device cost increases significantly
Solution Approach 1:
The base station's primary antenna is designed to serve dual purposes: NFC communication and wireless charging. By modifying the existing NFC base station to also function as a charging device, the patent eliminates the need for separate dedicated charging equipment, thereby reducing device cost while maintaining charging convenience.
Solution Approach 2:
The portable device automatically modifies the coupling between antennas to trigger authentication request signals, which are then used to charge its own battery. The device self-manages the charging process by controlling the coupling modification and utilizing the base station's existing infrastructure without requiring additional charging components.
2Reliability
If traditional wireless induction charging equipment is used, then charging capability is provided, but equipment cost becomes very expensive
Solution Approach 1:
The base station is designed to perform both NFC authentication and wireless charging functions using the same primary antenna. This multi-functionality approach provides reliable charging capability while avoiding the need for separate expensive charging equipment.
Solution Approach 2:
The patent uses the existing NFC communication infrastructure as an intermediary to enable charging. By leveraging the already-deployed NFC base stations and modifying them to provide charging capability, the solution avoids direct investment in new dedicated charging equipment while maintaining reliable charging function.
3Productivity
If dedicated induction charging modules are deployed, then fast charging capability is achieved, but implementation cost increases
Solution Approach 1:
The base station's primary antenna is made multi-functional to provide both NFC and fast charging capabilities. This approach achieves fast charging productivity by utilizing existing infrastructure rather than deploying new dedicated fast charging modules, thereby reducing implementation cost.
Solution Approach 2:
The portable device autonomously manages the charging process by modifying antenna coupling to trigger authentication signals and controlling the charging flow. This self-service mechanism enables fast charging capability while avoiding the need for complex external charging control systems.
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
Enables rapid and continuous charging of small-sized batteries using existing near-field communication base stations, reducing costs compared to dedicated induction charging solutions and achieving faster charging times than traditional methods.
Implementation Method 1
the primary antenna of the base station and the secondary antenna of the device being electromagnetically coupled
Data Source
AI summary
A method for charging a power supply battery of a portable device by near-field communication with a base station. The method, implemented by the device, includes, the primary antenna of the base station and the secondary antenna of the device being electromagnetically coupled, the steps of modifying the coupling between the primary antenna of the base station and the secondary antenna of the device, of receiving an authentication request signal sent by the base station subsequent to the step of modifying the coupling, and of charging the power supply battery of the device from the energy of the received authentication request signal.