Battery Charging System Multiple Constant Current Stages
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Solution Overview
Problem
Conventional battery charging techniques, such as CC-CV charging, are detrimental to battery health and longevity due to their charging methods.
Innovation Solution
A battery charging system that uses multiple constant current (CC) stages without a constant voltage (CV) stage, dynamically managing the charge current based on the available charge period to reach a target charge level just prior to the end of the charging time, with the option to adjust the charge current distribution scheme according to user habits and charging duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant voltage (CV) stage is used in CC-CV charging to complete charging faster, then charging speed is improved, but battery health and longevity deteriorate due to excessive charging and high charge currents
Solution Approach 1:
The patent removes the constant voltage (CV) stage from the traditional CC-CV charging process, extracting only the harmful constant voltage portion while retaining beneficial constant current charging. This allows the system to avoid excessive charging and high voltage stress on the battery while still achieving adequate charging speed through optimized constant current stages.
Solution Approach 2:
The patent changes the charging parameters by using multiple constant current stages with different current levels instead of a single CV stage. The charge current is dynamically adjusted through multiple CC stages, where earlier stages use higher currents and later stages use lower currents, optimizing both charging speed and battery health by avoiding the high voltage conditions that damage batteries.
2Productivity
If high charge current is applied to charge battery faster, then charging speed is improved, but battery damage increases reducing longevity
Solution Approach 1:
The patent segments the charging process into multiple constant current stages, each with different current levels. Instead of applying a single high current throughout, the charging current is divided into several stages where earlier stages may use higher currents and later stages use progressively lower currents. This segmentation allows the system to achieve faster charging when possible while minimizing battery damage through reduced current in later stages.
Solution Approach 2:
The patent implements dynamic charge current management by adjusting the current level based on the charging progress and available charge period. The system dynamically transitions between multiple constant current stages, adapting the current profile to optimize both charging speed and battery health throughout the charging process rather than maintaining a static high current.
3Quantity of substance
If battery is charged to full capacity using traditional methods, then charge level is maximized, but battery stress increases reducing overall lifespan
Solution Approach 1:
The patent applies partial charging action by using multiple constant current stages that charge the battery to an adequate level without forcing excessive charging to absolute full capacity. The system determines when sufficient charge has been achieved and transitions to lower current stages or terminates charging, avoiding the excessive stress that occurs with traditional methods that continuously push to 100% capacity.
Data Source
AI summary
A method, in some embodiments, comprises: providing a battery charging system; and using the battery charging system to charge a battery to a target charge level using multiple constant current (CC) stages and without using a constant voltage (CV) stage.