Wireless Charging Authentication for Safe High-Power Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless power transfer systems face challenges in ensuring stability and reliability due to non-authenticated products, which can lead to safety risks during charging, particularly due to issues with foreign object detection and overheating, and there is a need for effective authentication mechanisms to verify the compatibility and genuineness of wireless power transmitting and receiving devices.
Innovation Solution
A method and device for performing authentication in a wireless power transfer system, including a wireless charging certificate format, authentication function support indication, timing protocols, and lower-level communication protocols to ensure mutual authentication between wireless power transmitting and receiving devices, enabling stable and reliable high-power wireless charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is implemented without authentication mechanisms, then power transmission can be performed freely and conveniently, but safety risks arise due to foreign objects and overheating
Solution Approach 1:
The patent implements authentication mechanisms that perform verification actions before power transmission begins. The transmitting device and receiving device exchange authentication packets and verify each other's identities in advance, ensuring that only authorized devices can establish power transfer connections. This preliminary authentication prevents foreign objects and unauthorized devices from causing safety hazards during charging.
2Reliability
If authentication mechanisms are added to verify device compatibility, then safety and reliability are improved, but system complexity increases
Solution Approach 1:
The patent employs universal authentication protocols that can verify multiple device types and manufacturers through standardized authentication packets. The authentication mechanism is designed to be multi-functional, handling device identification, compatibility verification, and authorization in a unified framework. This approach maintains reliability while avoiding excessive complexity by using a versatile authentication system that can adapt to different device scenarios.
3Reliability
If mutual authentication is performed between transmitting and receiving devices, then device compatibility and genuineness are verified, but communication overhead and charging time increase
Solution Approach 1:
The patent implements a two-stage authentication approach where essential verification is performed quickly in the first stage using partial authentication checks, and more comprehensive verification is conducted only when necessary in subsequent stages. This allows the system to achieve sufficient authentication accuracy for most scenarios without always performing the complete, time-consuming verification process, thereby reducing average authentication time while maintaining reliability.
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 proposed solution ensures stability and reliability during wireless charging by authenticating devices, preventing potential safety hazards and ensuring compatibility, thus enhancing user safety and device interoperability.
Implementation Method 1
The magnetic induction method corresponds to a method transmitting power by using electric currents that are induced to the coil of the receiver by a magnetic field, which is generated from a coil battery cell of the transmitter, in accordance with an electromagnetic coupling between a transmitting coil and a receiving coil.
Implementation Method 2
The magnetic resonance method is similar to the magnetic induction method in that is uses a magnetic field. However, the magnetic resonance method is different from the magnetic induction method in that energy is transmitted due to a concentration of magnetic fields on both a transmitting end and a receiving end, which is caused by the generated resonance.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a device and method for performing authentication in a wireless power transfer system. Provided is an authentication method in a wireless power transfer system including receiving a first packet including indication information on whether a target device supports an authentication function from the target device; transmitting, when the target device supports an authentication function, an authentication request message to the target device; receiving an authentication response message including a certificate on wireless charging from the target device in response to the authentication request message; and confirming authentication of the target device based on the authentication response message.