Wireless Power Exchange Device With State-Based Control
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Solution Overview
Problem
The wireless USB system lacks a 'VBUS' for power exchange, and existing wireless power transmission devices do not consider the power source states of devices, leading to unnecessary power transmission.
Innovation Solution
A power exchange device and method that includes a connection portion, wireless communication portion, power exchange portion, and power control portion to manage and control power exchange based on the power source state of connected devices, enabling controlled power transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power transmission is implemented without considering power source states, then power transmission capability is achieved, but unnecessary power transmission occurs leading to energy waste
Solution Approach 1:
The power control portion continuously monitors the power source state of the other device and uses this feedback information to dynamically control whether power transmission should occur. This feedback mechanism prevents unnecessary power transmission by ensuring power is only transmitted when the receiving device actually needs it, thus resolving the contradiction between maintaining power transmission capability and avoiding energy waste.
Solution Approach 2:
The system dynamically adjusts its power transmission behavior based on real-time power source state information. Rather than operating in a static mode where power transmission is always active or always inactive, the system transitions between different operational states (transmitting power, not transmitting power, requesting power) based on current conditions, thereby optimizing energy usage while maintaining transmission capability when needed.
2Ease of operation
If wireless USB system is used for data communication, then user friendliness is improved by eliminating physical cable connection, but power exchange functionality is lost due to absence of VBUS
Solution Approach 1:
The wireless communication portion is designed to perform multiple functions: both data communication and power exchange control. By making the wireless interface universal, the system maintains the cable-free convenience of wireless USB while adding the ability to control and manage power transmission, thus resolving the contradiction between ease of operation and power exchange capability.
Solution Approach 2:
The wireless communication portion acts as an intermediary that enables power exchange control without requiring a physical VBUS connection. It transmits power control signals and coordinates power transmission between devices wirelessly, serving as a mediator that bridges the gap between the convenience of wireless communication and the need for power exchange functionality.
3Loss of energy
If power transmission is controlled based on power source state, then energy efficiency is improved, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The power control portion is integrated with the wireless communication portion and existing power management functions rather than being a completely separate system. By merging control functions into existing components, the system achieves energy-efficient controlled power transmission while minimizing the increase in overall system complexity. The power control portion leverages existing communication infrastructure to gather power source state information and make transmission decisions.
Data Source
AI summary
A power exchange device includes: a connection portion that is connected to another device; a wireless communication portion that performs wireless communication with a power exchange device in the vicinity; a power exchange portion that exchanges power with the power exchange device in the vicinity; a power management portion that causes the power exchanged by the power exchange portion to be input and output between the connection portion and the other device; and a power control portion that, after the wireless communication portion has performed the wireless communication with the power exchange device in the vicinity, controls whether to cause the power exchange portion to exchange power with the power exchange device in the vicinity depending on a power source state of the other device.