Charging Terminal Messaging for Stable Power Delivery
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Solution Overview
Problem
During charging, the sink terminal cannot communicate with the source terminal until it has entered a controllable state, leading to repeated hard resets and interruptions in power delivery, resulting in unstable charging.
Innovation Solution
The source terminal transmits a bus voltage and a source message, enabling the message transceiver in the sink terminal to send a request message, allowing continuous communication and power delivery once the sink terminal has entered a sink attached state, preventing hard resets and ensuring steady charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the source terminal waits for the sink terminal to enter a controllable state before enabling communication, then communication reliability is improved, but charging stability deteriorates due to repeated hard resets
Solution Approach 1:
The source terminal continues to transmit the bus voltage and source messages before receiving the request message from the sink terminal. This preliminary action ensures that power delivery is already established when the sink terminal enters the controllable state, preventing communication failures and repeated hard resets that would otherwise occur if the source terminal waited for confirmation first.
2Use of energy by moving object
If the source terminal stops transmitting communication signals when no reply is received, then energy consumption is reduced, but charging stability deteriorates due to communication failures
Solution Approach 1:
The source terminal maintains continuous transmission of the bus voltage and source messages even when no reply message is initially received from the sink terminal. This continuous action ensures that power delivery remains uninterrupted and the sink terminal can establish communication on its own timeline without causing charging instability or repeated hard resets.
Data Source
AI summary
A charging system includes a source terminal and a sink terminal. The control method of the charging system includes transmitting a bus voltage by the source terminal, determining whether the sink terminal has entered a sink attached state when the sink terminal receives the bus voltage, enabling a message transceiver of the sink terminal if the sink terminal has entered the sink attached state, transmitting a source message to the transceiver of the sink terminal by the source terminal, transmitting a request message to the source terminal by the message transceiver of the sink terminal while the source terminal transmits the source message, and continuing to enable a communication function for communicating with the sink terminal and continuing to transmit the bus voltage to the sink terminal by the source terminal when the source terminal receives the request message.