Rechargeable Device Power Feeding Control Method
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Solution Overview
Problem
Electronic devices connected to multiple power sources face challenges in seamlessly switching to alternative power sources when the primary power source is disconnected, leading to interruptions in battery charging.
Innovation Solution
A rechargeable device with an AC connection section, an external electronic device connection section, and a control section that manages power feeding by charging the battery using the AC power source when available, and switches to power from an external device if the AC power is disconnected, ensuring continuous charging by performing initial communication to determine the availability of a predetermined current from the external device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device waits for AC power disconnection before switching to external device charging, then power source stability is maintained, but charging continuity is interrupted
Solution Approach 1:
The control section performs preliminary evaluation of the external device's charging capability before AC power disconnection occurs. By assessing whether the external device can supply predetermined current levels in advance, the system prepares the charging path beforehand, enabling seamless switching without charging interruptions when AC power is disconnected.
2Loss of time
If the device immediately switches to external device charging when AC power is disconnected, then charging continuity is maintained, but power source stability is compromised
Solution Approach 1:
The system evaluates the external device's charging capability in advance by checking whether it can supply the predetermined current. This preliminary assessment ensures that switching to external device charging only occurs when the external device is confirmed to be capable, thereby maintaining charging continuity without compromising power source stability.
Solution Approach 2:
The control section continuously monitors the connection status of both AC power and external device, and evaluates the external device's current supply capability. This feedback mechanism ensures that switching decisions are made based on real-time conditions, maintaining both charging continuity and power source stability by only switching when appropriate conditions are met.
3Adaptability or versatility
If the device performs communication and charge-setting routine with external device during AC charging, then adaptability to multiple power sources is improved, but device complexity increases
Solution Approach 1:
The control section performs communication with the external device and executes the charge-setting routine in advance, while AC power is still available. This preliminary configuration stores the external device's charging parameters and capability information, so that when AC power is disconnected, the device can immediately utilize the pre-configured settings without complex real-time decision-making, thereby reducing control logic complexity while maintaining multi-power source adaptability.
Data Source
AI summary
Provided is an electronic device which is selectively connectable to two or more power sources thereby to charge the battery therein, and when connection with one power source is discontinued, the electronic device promptly switches connection to another power source thereby to start battery charging. When the external device connection section 290 becomes connected to an external device, while an AC connection section 300 is connected to an AC power source, a control section 210 performs initial communication with the external device thereby to perform charge setting necessary for charging a battery 310 via the external device.