DC/DC Battery Current Control With Adaptive Feedback Balancing
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Solution Overview
Problem
Existing battery charging and discharging systems face challenges in balancing safety and efficiency, particularly due to issues with overcharging or overdischarging, which can affect the state of health and safety of storage batteries.
Innovation Solution
A battery charging and discharging system that includes a DC/DC converter with a switching device and a control circuit comprising a sampling circuit, processor, and drive circuit, which adjusts current based on multiple feedback controls to adaptively manage charging and discharging within safe limits, ensuring real-time requirements are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging and discharging current is increased to improve charging and discharging efficiency, then the charging and discharging efficiency is improved, but the safety of the storage battery and battery charging and discharging circuit is compromised due to overcharging or overdischarging
Solution Approach 1:
The patent implements a dual feedback control mechanism where the first feedback control monitors charging/discharging current to prevent overcharging and overdischarging, while the second feedback control monitors battery state of health and adjusts current limits dynamically. This feedback system enables the controller to automatically adjust operating parameters to maintain both high efficiency and safety.
Solution Approach 2:
The patent dynamically adjusts the charging and discharging current based on real-time battery state of health assessments. The controller modifies current limits adaptively rather than using fixed thresholds, allowing the system to operate at optimal efficiency levels while preventing dangerous conditions. The switching device adjusts its operation dynamically in response to changing battery conditions.
2Measurement precision
If multiple feedback controls are implemented to ensure safety and efficiency, then the control precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple feedback control functions into a single integrated controller that manages both current monitoring and state of health assessment. The controller integrates the switching device control, dual feedback signal processing, and adaptive current limit adjustment in one unified circuit, reducing overall system complexity while maintaining high control precision through coordinated multi-parameter monitoring.
Data Source
AI summary
A battery charging and discharging system includes: the battery charging and discharging circuit and a control circuit. The control circuit includes a processor. The processor is configured to: determine a first target current value corresponding to each of at least two feedback controls based on sampled data corresponding to the at least two feedback controls; determine a second target current value based on the first target current value corresponding to each of the at least two feedback controls; and comprehensively balance a first target current value of each feedback control, to adaptively determine a second target current value. A drive signal is generated based on the second target current value, and the drive signal is output to the DC/DC converter.