Dynamic Battery Charger Using Dual Control Loops
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Solution Overview
Problem
Existing charging technologies for electrical energy stores face challenges in efficiently charging batteries within a preset time while minimizing aging, as they fail to adapt dynamically to state changes and do not effectively manage side reactions.
Innovation Solution
A charger with both open-loop and closed-loop control units that operate simultaneously, using an evaluation unit with state-of-charge and aging evaluation means to adjust charging currents, combining open-loop and closed-loop control methods to optimize charging time and reduce aging by generating and summing charging currents based on real-time sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If high charging current is applied to charge the electrical energy store quickly, then charging time is reduced, but side reactions increase causing accelerated aging
Solution Approach 1:
The charging current is made dynamic through dual control loops: an open-loop control dynamically adjusts current based on state of charge calculations to achieve target charge levels, while a closed-loop control continuously monitors actual state parameters and adjusts current to minimize side reactions. This dynamic adaptation allows the system to optimize charging speed while preventing excessive aging at different charging stages.
Solution Approach 2:
The system changes charging current parameters based on real-time battery state. The open-loop control calculates required current changes to reach defined state of charge within preset time, while the closed-loop control modifies current parameters to minimize side reaction currents. This parameter adaptation enables the system to balance charging speed and aging prevention by adjusting current magnitude and profile according to battery conditions.
2Reliability
If complex control algorithms are used to minimize aging, then battery longevity is improved, but computational time and processing requirements increase
Solution Approach 1:
The control system is segmented into two independent but simultaneous control loops: open-loop control handles the primary charging trajectory calculation and state of charge estimation, while closed-loop control focuses specifically on minimizing side reactions based on actual measurements. This segmentation allows each control algorithm to be computationally efficient while collectively achieving both fast charging and aging minimization without requiring excessively complex unified algorithms.
Data Source
AI summary
A charger (1) and a method for charging an electrical energy store (2), wherein the charger (1) has a control unit (12) and a regulation unit (9), wherein the charger (1) is designed to charge the electrical energy store (2) to a defined state of charge within a predefined charging time and, to this end, to set a charging current and a side reaction current of the electrical energy store (2).