Multi-Stage Battery Charging Control to Shorten Charge Time
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Solution Overview
Problem
Current battery charging methods are inefficient due to the long duration of the constant-voltage charging stage, which prolongs the overall charging process and decreases charging speed, especially when charging batteries with multiple cells.
Innovation Solution
Implementing a multi-stage constant-current charging method where the charging voltage and cell voltages are monitored to progress through stages with decreasing current levels, allowing the battery to reach higher cut-off voltages, thereby prolonging constant-current charging and reducing the overall charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging procedure with constant-voltage charging stage is used, then battery voltage is controlled within rated voltage, but charging process becomes too long and charging speed decreases
Solution Approach 1:
The charging process is segmented into multiple constant-current charging stages with different current values. Each stage charges the battery at a different current level until a voltage threshold is reached, then transitions to the next stage with a lower current. This segmentation allows the battery to be charged more efficiently by avoiding the prolonged constant-voltage stage while still controlling voltage within safe limits through staged current reduction.
2Productivity
If multi-stage constant-current charging with cut-off voltage higher than rated voltage is applied, then constant-current charging duration is prolonged and charging speed increases, but voltage exceeds rated voltage
Solution Approach 1:
The charging system dynamically changes voltage parameters by implementing multiple constant-current stages with progressively lower currents. Each stage has a specific current value and corresponding voltage threshold. The system allows voltage to temporarily exceed the rated voltage during constant-current stages but transitions to lower current stages before voltage becomes dangerous, thus achieving faster charging while maintaining battery safety through parameter dynamic adjustment.
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
This approach shortens the entire charging process by prolonging the constant-current charging phase, increasing charging speed and efficiency, while eliminating the need for a prolonged constant-voltage charging stage.
Implementation Method 1
a battery which includes multiple cells
Data Source
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AI summary
A charging control method and apparatus, and a computer storage medium are provided. The method is applicable to a device to-be-charged. The device to-be-charged includes a battery which includes multiple cells. The method includes the following. In charging of the device to-be-charged, K stages of constant-current charging is applied to the battery, where K is a positive integer greater than or equal to one. In each of the K stages, a preset current corresponding to the stage is applied to the battery for constant-current charging until a voltage of the battery reaches a preset voltage corresponding to the stage. In each of the K stages, a charging voltage applied to the battery and a voltage across each of the multiple cells are detected. When the charging voltage and/or a voltage across any of the multiple cells is higher than the preset voltage corresponding to the stage, the device to-be-charged is controlled to proceed to a next constant-current charging stage.