Wireless Power Reception Path Selection for Overcurrent Prevention
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Solution Overview
Problem
Conventional contactless charging systems for electronic devices can supply overcurrent and overvoltage to battery packs, posing risks during charging.
Innovation Solution
An electronic device with a control unit that selectively uses either a primary coil or a secondary coil for power reception from a power supply apparatus, ensuring that the battery pack is charged within safe current and voltage thresholds, preventing overcharging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If both the electronic device and battery pack have power receiving units and charge the battery simultaneously, then charging speed increases, but overcurrent and overvoltage occur
Solution Approach 1:
The patent implements dynamic control of power reception by the electronic device based on real-time detection of battery charge state and power supply capacity. The control unit adjusts or stops power reception from the power supply apparatus through the electronic device's power receiving unit based on detected parameters, preventing overcurrent and overvoltage while optimizing charging speed. This dynamic adjustment resolves the contradiction between fast charging and safe operating conditions.
2Ease of operation
If the battery pack has a power receiving unit for contactless power supply, then charging convenience improves, but control over power input becomes difficult
Solution Approach 1:
The patent implements a feedback control mechanism where the control unit continuously detects the charge state of the battery and the power supply capacity of the power supply apparatus. Based on this feedback information, the control unit dynamically adjusts the power reception of the battery pack's power receiving unit, ensuring safe and efficient charging while maintaining ease of operation. The feedback loop enables automatic optimization without user intervention.
3Use of energy by moving object
If power is supplied to the battery through both the electronic device and battery pack, then power utilization efficiency increases, but safety risks increase
Solution Approach 1:
The patent implements preliminary detection of battery charge state and power supply capacity before initiating power reception. The control unit detects these parameters in advance and determines the appropriate power reception strategy, preventing overcurrent and overvoltage conditions before they occur. This preliminary action ensures safe charging while maximizing power utilization efficiency from both power sources.
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
The solution effectively prevents overcurrent and overvoltage supply to the battery pack, ensuring safe and efficient charging by dynamically selecting the optimal power reception path based on available power and device capabilities.
Implementation Method 1
a first unit that wirelessly receives power from a power supply apparatus, and a control unit that executes control, if an external apparatus, including a second unit that wirelessly receives power from the power supply apparatus
Data Source
AI summary
An electronic device includes a first unit that wirelessly receives power from a power supply apparatus, and a control unit that executes control, if an external apparatus, including a second unit that wirelessly receives power from the power supply apparatus, and the electronic device are connected, to select at least one of the first unit and the second unit.