Portable Power Conversion Circuit for Auto Shutdown During Charging
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Solution Overview
Problem
Existing portable devices require additional actions to stop the operation of driving components during charging, which is inconvenient, especially for devices like hearing aids that do not need to operate during charging.
Innovation Solution
A portable device with a secondary battery, a charging unit, a transformation unit, and a switching controller that automatically switches the operation state of the transformation unit to a stopped state when outside power is detected, eliminating the need for manual or mechanical on-off mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual on-off mechanism or automatic on-off mechanism using mechanical contact is used to stop the operation of the driving component during charging, then the driving component can be stopped during charging, but the device complexity increases and the handling becomes more cumbersome
Solution Approach 1:
The patent replaces mechanical contact-based on-off mechanisms with a control unit that detects charging state through electrical signals. The control unit automatically controls the transformation unit based on detection unit output, eliminating the need for mechanical contacts and pushbuttons, thus reducing device complexity while maintaining ease of operation.
Solution Approach 2:
The system automatically detects the charging state through the detection unit and autonomously controls the transformation unit via the control unit. This self-service mechanism eliminates the need for user intervention to stop the driving component during charging, improving ease of operation without adding mechanical complexity.
2Extent of automation
If additional mechanisms are added to automatically stop the driving component during charging, then the operation state can be automatically switched, but the device size increases
Solution Approach 1:
The patent merges the detection function, control function, and transformation function into an integrated system. The control unit receives detection signals and controls the transformation unit, combining multiple functions into a unified electronic control architecture that achieves automatic switching without significantly increasing device volume.
Solution Approach 2:
The control unit serves multiple functions: it receives detection signals from the detection unit, determines charging state, and controls the transformation unit. This multi-functional design achieves automatic operation state switching while minimizing the number of separate components, thereby controlling device size.
Data Source
AI summary
A portable device including a secondary battery, a plurality of driving components driven by charged power of the secondary battery, a charging unit configured to charge the secondary battery by an input of outside power supplied from outside of the portable device, a plurality of transformation units each configured to output the charged power of the secondary battery at a driving voltage of a corresponding one of the plurality of driving components, a detection unit configured to detect the input of the outside power to the charging unit, and a switching controller configured to switch a state of one of the plurality of transformation units from an operation state to a stopped state responsive to detecting the input of the outside power to the charging unit causing only the corresponding one of the plurality of driving components to stop operation during charging of the secondary battery.