Wireless Power Authentication Across Phases for Safe High-Power Charging
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Solution Overview
Problem
Existing wireless power transmission systems lack a standardized method for authenticating devices before high-power transfer, leading to potential damage from overvoltage and compatibility issues between different power profiles, which affects user experience and safety.
Innovation Solution
A method involving a ping phase for device identification, a configuration phase for exchanging authentication information, and a power transfer phase with low and high power transfer phases, where authentication is performed before enabling high-power transfer, ensuring only certified devices receive high power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless power is transmitted without authentication, then power transfer speed and efficiency are improved, but device safety and compatibility deteriorate due to overvoltage damage and profile mismatches
Solution Approach 1:
The patent applies preliminary action by performing authentication and power profile negotiation before initiating high-power transfer. The receiver first transmits its power profile information to the transmitter, and the transmitter authenticates the receiver and determines appropriate power parameters before enabling high-power transmission. This preliminary authentication phase ensures device safety while maintaining efficient power transfer during the actual charging process.
2Reliability
If authentication protocol is added before power transfer, then device safety and compatibility are improved, but system complexity and transmission time increase
Solution Approach 1:
The patent segments the power transfer process into distinct phases: a power profile negotiation phase where authentication information is exchanged, and a power transfer phase where actual power transmission occurs. By separating authentication from power transfer, the system manages complexity through structured protocol stages while ensuring device safety through mandatory authentication before high-power transmission.
Solution Approach 2:
The authentication and power profile negotiation are performed periodically at the beginning of each power transfer session. This periodic action establishes safety parameters in advance, allowing the system to maintain simple high-power transmission during the actual charging phase while ensuring reliability through regular authentication cycles.
3Adaptability or versatility
If power profile negotiation is performed, then compatibility between different devices is improved, but communication overhead and setup time increase
Solution Approach 1:
The patent performs power profile negotiation as a preliminary action during the initial connection phase. The receiver transmits its power profile information packet to the transmitter, and the transmitter determines appropriate power parameters before initiating high-power transfer. This preliminary negotiation ensures broad device compatibility while minimizing setup time during actual charging sessions.
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
Ensures safe and stable power transfer by authenticating devices before high-power transmission, preventing overvoltage and ensuring compatibility between different power profiles, thereby enhancing user experience and safety.
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
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
Implementation Method 3
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
AI summary
A method by which a wireless power transmitter transmits wireless power, according to one embodiment of the present specification, comprises: a ping step of transmitting a digital ping, and receiving a response to the digital ping from a wireless power receiver; a configuration step of receiving, from the wireless power receiver, a configuration packet including information about whether the wireless power receiver supports an authentication function; and a power transmission step of transmitting wireless power to the wireless power receiver, wherein the power transmission step includes a low-power transmission step of transmitting low wireless power, an authentication step of authenticating the wireless power transmitter on the basis the supporting of the authentication function by the wireless power receiver, and a high-power transmission step of transmitting high wireless power on the basis of the successful authentication of the wireless power transmitter in the authentication step.