Wireless Power Receiver Authentication and Dynamic Level Control
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Solution Overview
Problem
Existing wireless power transfer systems are unable to efficiently transfer high power to a power reception apparatus if the power transmission apparatus lacks a function for responding to device authentication, impairing user convenience.
Innovation Solution
A power reception apparatus is designed to perform device authentication on a power transmission apparatus and request higher power levels if authentication is successful, while allowing power reception without authentication from apparatuses that do not support device authentication, through a setting configured by the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If device authentication is implemented to ensure safe high-power reception, then power reception safety is improved, but compatibility with legacy power transmission apparatus without authentication function deteriorates
Solution Approach 1:
Instead of requiring the power transmission apparatus to initiate authentication (traditional approach), the power reception apparatus actively performs authentication by transmitting authentication requests and verifying responses. This inversion allows the reception apparatus to control the authentication process and determine power levels based on authentication results, thereby ensuring safety while maintaining compatibility with legacy transmitters that respond to authentication requests but do not initiate them.
Solution Approach 2:
The power reception apparatus performs self-authentication by autonomously transmitting authentication requests to the power transmission apparatus and processing the responses itself. This self-service approach enables the reception apparatus to verify the transmitter's authenticity and capability without requiring the transmitter to have active authentication initiation functions, thus ensuring safe high-power reception while maintaining broad compatibility.
2Reliability
If high power is permitted only after successful device authentication, then power reception safety is improved, but user convenience deteriorates when using legacy apparatus
Solution Approach 1:
The power reception apparatus dynamically adjusts the power reception level based on the authentication result. When authentication is successful, the apparatus permits high-power reception; when authentication fails or is not performed (legacy apparatus), the apparatus automatically reduces power to a safe lower level. This dynamic adjustment occurs automatically without requiring user intervention, thus maintaining user convenience while ensuring safety.
Solution Approach 2:
The system changes the power parameter based on authentication status. The power reception apparatus receives power at different levels (first power level for unauthenticated/legacy apparatus, second power level for authenticated apparatus) according to the authentication outcome. This parameter change enables automatic adaptation to different apparatus types without user configuration, preserving convenience while ensuring safety.
3Reliability
If automatic power level adjustment based on authentication result is implemented, then power reception safety is improved, but device complexity increases
Solution Approach 1:
The authentication function and power level control function are merged into a single integrated process within the power reception apparatus. The authentication unit and control unit work together in a unified authentication and power management system, where the authentication result directly determines the power level setting. This merging reduces the need for separate independent systems and simplifies the overall control architecture while ensuring safe power reception.
Solution Approach 2:
The power reception apparatus performs authentication as a preliminary action before establishing high-power reception. By completing the authentication process and determining the appropriate power level in advance, the system avoids the need for complex real-time adjustments during power transmission. This preliminary authentication step simplifies the control logic by establishing power levels upfront based on authentication results.
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 high-power reception from both authenticated and non-authenticated power transmission apparatuses, enhancing user convenience and reducing potential issues related to unauthorized device charging.
Implementation Method 1
a reception unit configured to wirelessly receive power from a power transmission apparatus
Data Source
AI summary
A power reception apparatus performs device authentication on a power transmission apparatus, and performs control to request first power of the power transmission apparatus in a case where the power transmission apparatus fails the device authentication and to request second power higher than the first power of the power transmission apparatus in a case where the power transmission apparatus successfully passes the device authentication. In addition, the power reception apparatus sets a setting to permit requesting the second power of a power transmission apparatus which does not have a function for responding to the device authentication.