Wireless Power Data Negotiation for Stable Cross-Class Charging
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining compatibility and stability between wireless power transmitters and receivers of different power classes, leading to potential damage or unstable charging due to overvoltage issues, and lack efficient data transmission methods.
Innovation Solution
Implementing a method where the wireless power transmitter receives request information from the receiver regarding auxiliary data transport (ADT) unit size and adjusts data transmission accordingly during the power transfer phase, using in-band and out-of-band communication to ensure stable and compatible power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power transmitter transmits data using fixed unit size without receiving request information, then the communication protocol is simple, but the data transmission time is long and power transfer efficiency is low
Solution Approach 1:
The patent implements dynamic ADT unit size adjustment where the transmitter adapts the data transmission unit size based on receiver requests received during the negotiation phase. This allows the system to optimize data transmission efficiency dynamically rather than using a fixed unit size, directly improving power transfer productivity while managing complexity through standardized negotiation procedures.
Solution Approach 2:
The patent changes the parameter of ADT unit size based on receiver capabilities and requests. By receiving request information during negotiation and adjusting the unit size accordingly, the system optimizes data transmission parameters to improve power transfer efficiency without requiring completely new communication protocols.
2Ease of operation
If the wireless power transmitter uses magnetic coupling method, then power can be transferred wirelessly, but overvoltage issues may occur causing damage or unstable charging
Solution Approach 1:
The patent implements a feedback mechanism where the receiver sends request information about its capabilities and power class to the transmitter during the negotiation phase. The transmitter uses this feedback to adjust power transfer parameters and prevent overvoltage conditions, ensuring reliable and stable wireless charging while maintaining convenience.
Solution Approach 2:
The patent performs preliminary negotiation and capability exchange before actual power transfer begins. By establishing the receiver's power class and capabilities in advance during the negotiation phase, the system can configure appropriate transmission parameters beforehand, preventing overvoltage issues and ensuring stable charging from the start.
Data Source
AI summary
Provided in the present disclosure are a method by which a wireless power transmitter transmits wireless power in a wireless power transmission system, and a device using same, the method comprising: establishing a power transmission contract with a wireless power receiver in a negotiation phase; and transmitting, to the wireless power receiver, wireless power on the basis of the power transmission contract in a power transmission phase, wherein: the wireless power transmitter receives request information from the wireless power receiver in the negotiation phase; the request information is information related to the unit size of at least one piece of auxiliary data transport (ADT) information transmitted by means of the wireless power transmitter; and the wireless power transmitter transmits, to the wireless power receiver, the at least one piece of ADT information in the power transmission phase on the basis of the information related to the unit size.