Dynamic Communication Interval Control for Fast Battery Charging
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Solution Overview
Problem
Existing methods for battery charging, such as those described in Japanese Patent Laid-Open No. 2015-070777, do not effectively reduce the time required for battery charging, as they do not adequately manage communication intervals during the charging process.
Innovation Solution
An electronic device with a charging unit and a control unit that adjusts communication intervals based on battery voltage thresholds and change amounts, shortening the communication interval when the battery voltage is below a predetermined threshold and lengthening it when the voltage is above, to optimize power delivery and reduce charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the communication interval is kept short throughout the entire charging process, then the charging time can be reduced, but the power consumption and system complexity increase
Solution Approach 1:
The communication interval is dynamically adjusted based on the charging state. During constant current charging, a first communication interval is used, and during constant voltage charging, a second communication interval (longer than the first) is used. This dynamic adjustment reduces system complexity while maintaining short communication intervals when needed to minimize charging time.
Solution Approach 2:
The communication interval parameter is changed according to the charging phase. The system switches between different communication interval values based on whether the battery is in constant current or constant voltage charging mode, optimizing the balance between charging speed and system complexity.
2Use of energy by moving object
If the communication interval is extended when battery voltage exceeds the threshold, then power consumption is reduced, but the charging time increases
Solution Approach 1:
The communication follows a periodic pattern where the interval varies based on the charging phase. During constant current charging, communications occur more frequently (shorter interval), and during constant voltage charging, communications occur less frequently (longer interval). This periodic variation optimizes both power consumption and charging time by matching communication frequency to the actual charging needs at each phase.
3Measurement precision
If communication frequency is increased during constant voltage charging, then charging precision is improved, but power consumption increases
Solution Approach 1:
Different communication frequencies are applied to different charging phases based on local requirements. During constant current charging, higher communication frequency provides precise current control. During constant voltage charging, lower communication frequency is sufficient for voltage monitoring. This local differentiation optimizes power consumption while maintaining necessary precision at each stage.
Data Source
AI summary
An electronic device includes a charging unit that charges a battery with power supplied from an external device, and a control unit that controls a communication unit of the electronic device such that a communication interval from a start of charging the battery by the charging unit until a battery voltage exceeds a predetermined threshold is shorter than a communication interval after the battery voltage exceeds the predetermined threshold, in a case where power is received from the external device.