Remaining Charging Time Prediction for Quick Charging Accuracy
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Solution Overview
Problem
Existing methods for predicting remaining charging time in quick charging mode are inaccurate due to neglecting the constant voltage portion, leading to user experience issues.
Innovation Solution
A method that obtains the current state of charge, determines a reference remaining time and delay time, and calculates the current remaining charging time based on these factors, considering the whole charging stage and temperature adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If quick charging mode is used to increase charging speed, then charging power increases and charging time decreases, but prediction accuracy of remaining charging time deteriorates
Solution Approach 1:
The charging process is segmented into constant current charging stage and constant voltage charging stage. The method separately handles prediction for each stage, applying different prediction logic depending on which stage the charging is currently in, thereby improving overall prediction accuracy while maintaining quick charging speed.
Solution Approach 2:
The prediction method dynamically changes parameters based on charging stage. When in constant current stage, it uses one set of prediction parameters; when in constant voltage stage, it switches to another set. This parameter adaptation allows accurate prediction across different charging phases without sacrificing charging speed.
2Device complexity
If constant voltage portion is neglected to simplify prediction, then calculation complexity decreases, but prediction accuracy deteriorates
Solution Approach 1:
Instead of neglecting the constant voltage portion, the method segments the charging process and explicitly handles both constant current and constant voltage stages. This segmentation approach maintains prediction accuracy while keeping the calculation methodology systematic and manageable.
Solution Approach 2:
The method performs preliminary identification of the current charging stage before executing the prediction calculation. By determining whether the device is in constant current or constant voltage stage first, it prepares the appropriate prediction parameters in advance, avoiding complex real-time calculations while maintaining accuracy.
Data Source
AI summary
A method for predicting remaining charging time, including: obtaining a current state of charge; determining a reference remaining time and a delay time according to the current state of charge; and determining a current remaining charging time according to the reference remaining time and the delay time.