Dynamic Charging Control for Battery Aging Reduction
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Solution Overview
Problem
Existing battery charging systems fail to efficiently charge electrical energy stores within a preset time while minimizing aging, as they lack dynamic control mechanisms to adapt to state changes and optimize charging profiles.
Innovation Solution
A charger with both open-loop and closed-loop control units, utilizing an evaluation unit with sensors to determine state parameters and apply optimized charging profiles, minimizing aging through simultaneous operation of both control methods and generating combined charging currents to achieve quick charging with reduced aging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a high charging current is applied to charge the electrical energy store quickly, then the charging time is reduced, but the ageing of the electrical energy store increases
Solution Approach 1:
The charging current is dynamically adjusted throughout the charging process rather than remaining constant. The control unit continuously modifies the charging current based on the state of charge and time, applying higher currents during phases where they are beneficial and reducing them when they would cause excessive ageing, thus resolving the contradiction between charging speed and battery longevity
Solution Approach 2:
The system changes the charging current parameter as a function of time and state of charge. By implementing a time-dependent charging profile where the current parameter varies according to the charging stage, the system achieves both fast charging and minimized ageing through optimized parameter evolution
2Productivity
If a complex control system is implemented to optimize charging profiles and minimize aging, then the charging efficiency and battery longevity are improved, but the device complexity increases
Solution Approach 1:
The control unit implements a feedback mechanism that continuously monitors the state of charge and adjusts the charging current accordingly. This feedback loop enables the system to optimize charging efficiency and minimize ageing without requiring overly complex control architecture, as the feedback provides real-time information for intelligent decision-making
Solution Approach 2:
The system pre-calculates or pre-determines optimal charging profiles based on the electrical energy store's characteristics before charging begins. By preparing charging strategies in advance and selecting appropriate profiles based on initial conditions, the system reduces the complexity of real-time control while maintaining high charging efficiency and battery protection
Data Source
AI summary
A charging device (1) and a method for charging an electrical energy store (2), wherein the charging device (1) has an open-loop control unit (12) and a controller (9), and the charging device (1) is configured to charge the electrical energy store (2) to a defined state of charge within a predefined charging period and, in addition, to control a charging current and a secondary-reaction current of the electrical energy store (2).