Power Path Control for Wireless Charging Stability
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Solution Overview
Problem
Non-contact power transmission systems using magnetic or electric fields face usability issues due to intermittent operation states and power supply shortages, leading to unnatural discontinuous states and erroneous user determinations during charging.
Innovation Solution
The electronic apparatus and feed system include a power reception section, secondary battery, charging section, load, and control section that forcibly set the power path to a predetermined state when the load is activated during charging, using a magnetic or electric field for power transmission, ensuring stable operation and informing the user of charging states effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-contact power transmission is performed using magnetic or electric field, then terminal connection is unnecessary and charging can be started by simply placing the electronic apparatus on the charging tray, but intermittent operation states occur and power supply shortages happen leading to unnatural discontinuous states
Solution Approach 1:
The patent applies dynamics by making the power path configuration changeable based on operational conditions. The control section dynamically switches between different power paths: using the secondary battery when the load is activated during charging, and using received power when the load is not activated. This dynamic adaptation resolves the contradiction by maintaining reliability through appropriate power source selection while preserving ease of operation through non-contact charging.
Solution Approach 2:
The patent changes the operational parameter of power path configuration based on the activation state of the load. By detecting whether the load is activated and accordingly switching the power supply mode, the system maintains stable operation indicators and prevents discontinuous states, thus improving reliability while keeping the non-contact charging interface simple.
2Adaptability or versatility
If the load is activated during charging to the secondary battery, then the load can perform predetermined operation, but power supply shortages occur causing forcible stoppage of the load and unnatural discontinuous states in informing operation
Solution Approach 1:
The system dynamically adjusts the power supply configuration based on load activation status. When the load is activated during charging, the control section switches to supply power from the secondary battery, ensuring continuous and stable power supply. This dynamic adaptation allows the load to operate during charging without causing power supply shortages or discontinuous informing operation, thus maintaining both adaptability and reliability.
Solution Approach 2:
The patent prepares the secondary battery in advance as a backup power source during charging operations. When the load is activated, the pre-charged secondary battery provides the necessary power cushion, preventing power supply shortages and ensuring continuous operation. This beforehand preparation resolves the contradiction by enabling load operation while maintaining power supply continuity.
3Ease of operation
If non-contact power transmission is used, then charging can be performed without connector insertion, but occurrence of failure phenomena is increased due to load activation in charging state
Solution Approach 1:
The control section dynamically monitors the charging state and load activation status, switching power paths as needed. When the load is activated during charging, it switches to secondary battery power supply to prevent failure phenomena. This dynamic control maintains the simplicity of non-contact charging while significantly improving charging stability by preventing the failure phenomena associated with load activation.
Solution Approach 2:
The system implements feedback control by detecting the activation state of the load during charging and automatically adjusting the power supply configuration. This feedback mechanism prevents failure phenomena by switching to appropriate power sources, thus maintaining both ease of operation and charging stability in non-contact power transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents unnatural discontinuous states and power shortages, enhancing user usability by maintaining a consistent charging state indication, thereby improving the reliability of non-contact power transmission.
Implementation Method 1
a power reception section configured to receive power transmitted with use of a magnetic field or an electric field
Implementation Method 2
a power reception section configured to receive power transmitted with use of a magnetic field or an electric field
Data Source
AI summary
An electronic apparatus includes: a power reception section configured to receive power transmitted with use of a magnetic field or an electric field; a secondary battery; a charging section configured to perform charging to the secondary battery, based on received power received by the power reception section; a load configured to perform predetermined operation, based on supplied power; and a control section configured to forcibly set a power path on a preceding side of the load to a predetermined state when the load is activated in the charging to the secondary battery.