Battery Charging Path Using LUT Stages to Limit Aging
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Solution Overview
Problem
Existing battery charging methods do not effectively adapt to the internal state of the battery, leading to inefficient charging and potential battery aging.
Innovation Solution
A method is developed to generate a charging path for a battery by creating simulation data based on a battery model, generating an initial look-up table (LUT) for charging currents and voltage limits, adjusting the LUT to satisfy charging thresholds, and determining a final LUT to optimize charging conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant current or constant voltage charging method is used, then charging process is simple, but charging efficiency is low and battery aging occurs
Solution Approach 1:
The patent implements dynamic charging current adjustment by dividing charging into multiple stages (first charging stage with first current, second charging stage with second current) and dynamically switching between them based on battery state. This dynamic approach optimizes charging efficiency while preventing battery aging, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent changes charging parameters (current magnitude, voltage limits) based on battery internal state and external conditions. By adjusting charging current from high to low across stages and modifying voltage thresholds dynamically, the system achieves both high charging efficiency and battery protection, resolving the contradiction between fast charging and aging prevention.
2Loss of time
If high charging current is applied, then charging time is reduced, but battery aging and safety risks increase
Solution Approach 1:
The patent segments the charging process into multiple stages (first charging stage, second charging stage, third charging stage) with different current levels. High current is applied only in early stages when battery can tolerate it, while lower currents are used in later stages to prevent aging. This segmentation enables fast charging without excessive aging, resolving the time-loss versus harmful-factors contradiction.
Solution Approach 2:
The patent employs periodic switching between different charging currents and stages. By alternating between high-current fast charging periods and lower-current protection periods, the system achieves overall fast charging while periodically protecting the battery from aging, resolving the contradiction between charging speed and battery health.
3Productivity
If charging limit conditions are not adjusted, then charging control is simple, but charging efficiency is suboptimal
Solution Approach 1:
The patent performs preliminary determination of charging limit conditions (first charging limit condition, second charging limit condition) before actual charging based on battery model and simulation data. This pre-calculation of optimal current and voltage thresholds simplifies real-time control while achieving high charging efficiency, resolving the contradiction between productivity and device complexity.
Solution Approach 2:
The patent introduces charging limit conditions as intermediary parameters that mediate between charging control simplicity and charging efficiency. By using these intermediate thresholds (current limits, voltage limits) derived from battery models, the system achieves efficient charging without complex real-time calculations, resolving the contradiction between efficiency and control complexity.
Data Source
AI summary
To generate a charging path for a battery, a method includes generating simulation data for charging currents based on a battery model indicating an internal state of a battery, generating an initial look-up table (LUT) for the charging currents and preset battery voltage limits based on the simulation data, the initial LUT representing initial charging limit conditions of the battery for stages corresponding to the charging currents, generating a modified LUT by adjusting at least one of the initial charging limit conditions of the initial LUT, in response to the initial LUT failing to satisfy a threshold, determining a final LUT based on the modified LUT, in response to the modified LUT satisfying the threshold, and generating a charging path for the battery based on the final LUT.