Power Supply Device Automatic Power Direction Control
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Solution Overview
Problem
Conventional power supply devices with USB-PD capabilities often incorrectly determine the direction of power transmission based on connection timing, requiring user intervention to switch the power supply and reception states.
Innovation Solution
A power supply device equipped with processing circuitry that estimates the battery consumption tendency and automatically adjusts the power supply device to either supply or receive power based on this estimation, eliminating the need for user-operated switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the power supply device uses connection timing to determine power transmission direction, then the device can automatically set power direction without user input, but the power direction may be opposite to user intention depending on connection timing
Solution Approach 1:
The device displays the determined power transmission direction on a display unit, providing feedback to the user. When the user detects that the power direction is opposite to their intention, they can input a switch instruction through input means, which the processing circuitry then uses to switch the power transmission direction. This feedback loop ensures the power direction aligns with user intention while maintaining automatic operation.
2Ease of operation
If the device adds display units and input means for user switching, then the user can correct wrong power direction, but the device complexity increases
Solution Approach 1:
The processing circuitry performs multiple functions: it determines power transmission direction based on connection timing, controls the display unit to show the determined direction, processes user switch instructions from the input means, and switches the power transmission direction when instructed. By integrating these diverse functions into a single processing circuitry unit, the device achieves ease of operation without proportionally increasing overall device complexity.
Data Source
AI summary
A power supply device includes a battery and processing circuitry. The processing circuitry is configured to estimate a tendency of consumption of the battery and put the power supply device into one of a first state in which the power supply device can supply electric power to another device and a second state in which the power supply device can receive electric power from said another device, in accordance with the tendency of consumption of the battery estimated.