Battery Charging Method Using Average Voltage for Unstable Power
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Solution Overview
Problem
Existing battery charging methods based on stable power sources fail to accurately determine battery charging progress when using unstable green energy sources, leading to misjudgment due to voltage drift caused by power fluctuations.
Innovation Solution
A method and device that define multiple charging regions and adjust the threshold charging current based on the battery's initial voltage and average voltage over time, allowing for continuous monitoring and adjustment to prevent misjudgment of charging levels, using an unstable power source like wind power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct voltage or current sampling is used during battery charging with unstable power source, then charging process is simple to implement, but misjudgment of battery charging level occurs due to voltage drift
Solution Approach 1:
The patent introduces an intermediary mechanism (average voltage calculation over multiple sampling points) between the unstable power source and the charging judgment logic. By sampling voltage at multiple points and computing the average, the system mediates the effect of instantaneous voltage fluctuations, providing a more stable basis for charging level determination without requiring complex additional hardware.
Solution Approach 2:
The patent implements feedback by continuously monitoring battery voltage during charging, comparing it against threshold values, and adjusting the charging current accordingly. The system uses the measured voltage information to feedback control the charging process, enabling dynamic adjustment that compensates for unstable power source conditions and prevents overcharging or undercharging.
2Productivity
If charging current is increased to improve charging speed, then productivity increases, but voltage drift becomes more severe leading to greater misjudgment risk
Solution Approach 1:
The patent applies dynamics by making the charging current adaptive rather than fixed. The system dynamically adjusts the charging current based on real-time voltage measurements and calculated averages, allowing the charging process to respond to changing conditions. This dynamic adjustment enables faster charging when conditions permit while maintaining accuracy when voltage fluctuations occur.
Solution Approach 2:
The patent performs preliminary action by calculating the average voltage from multiple sampling points before making charging level judgments. This preliminary processing of voltage data prepares a more reliable basis for subsequent charging decisions, reducing the impact of instantaneous fluctuations on charging speed and accuracy.
3Measurement precision
If multiple voltage sampling points are used to improve measurement accuracy, then charging level detection precision improves, but device complexity and measurement time increase
Solution Approach 1:
The patent applies segmentation by dividing the voltage measurement process into multiple discrete sampling points taken at different times during the charging cycle. Instead of relying on a single complex high-precision measurement, the system segments the measurement into several simpler samples that are then averaged, achieving high precision through a straightforward multi-step process.
Solution Approach 2:
The patent uses partial action by taking a limited number of voltage samples (not continuous monitoring) to achieve sufficient measurement accuracy. By sampling at key points during the charging process and averaging these readings, the system obtains reliable voltage information without the complexity and resource consumption of continuous high-frequency measurement.
Data Source
AI summary
The battery charging method includes: defining first to third charging regions according to a first predetermined voltage and the charging saturation voltage of a battery; determining a charging region of the battery according to the initial voltage of the battery, and determining a threshold charging current according to the charging regions of the battery; charging the battery according to the threshold charging current; continuously measuring a plurality of voltages in the battery during a predetermined period and determining an average voltage of the battery; determining if the previously determined charging region of the battery has changed according to the average voltage of the battery; and when the charging region of the battery has changed and the average voltage of the battery is lower than the charging saturation voltage, then lowering the threshold charging current and repeating the above steps.