PE-Based Battery Management with Integrated Power Conversion
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Solution Overview
Problem
Current battery management systems in battery energy storage systems (BESS) are complex and redundant, with multiple hierarchical levels of management, leading to inefficiencies and increased complexity, particularly in power conversion and circuit protection.
Innovation Solution
A power electronics-based battery management system (PE-based BMS) is introduced, which includes power converters and controllers to manage battery strings and modules, eliminating redundant components by integrating power conversion and circuit protection functions, and communicating with energy management systems for coordinated energy exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple hierarchical levels of battery management are implemented, then comprehensive battery control is achieved, but system complexity increases
Solution Approach 1:
The patent combines string-level BMS and system-level BMS into a single integrated PE-based BMS that directly manages battery strings. This merging eliminates the hierarchical structure and redundant components while maintaining comprehensive control through unified power conversion and protection functions.
Solution Approach 2:
The PE-based BMS performs multiple functions including power conversion, circuit protection, and battery management simultaneously. This multi-functionality replaces the need for separate management levels, reducing system complexity while achieving comprehensive battery control through a single versatile system.
2Adaptability or versatility
If separate string BMS and system BMS are used, then specialized functions are provided, but redundancy increases
Solution Approach 1:
The patent merges the functions of separate string BMS and system BMS into a single PE-based BMS that directly controls battery strings. This eliminates redundant components while preserving specialized functions through integrated power conversion and protection capabilities.
Solution Approach 2:
The PE-based BMS provides universal functionality by performing power conversion, protection, and management tasks that were previously distributed across multiple specialized systems. This single system delivers adaptability for various battery configurations without the redundancy of separate BMS units.
3Stability of the object's composition
If traditional hierarchical BMS architecture is maintained, then established control methods are used, but efficiency decreases
Solution Approach 1:
The patent inverts the traditional hierarchical architecture by having the PE-based BMS directly manage battery strings without intermediate management levels. This structural inversion eliminates efficiency losses associated with hierarchical communication and control while maintaining stable control through direct string-level management.
Data Source
AI summary
Methods, systems, and devices for power electronics-based (PE-based) battery management. A system may include a set of battery strings, where each battery string may include a set of battery modules, and where each battery module may include a set of battery cells. The system may also include a set of power converters, where each power converter may be coupled with at least one battery string. A power electronics-based (PE-based) BMS may provide one or more battery management functions for at least one corresponding battery string while also monitoring or controlling a corresponding power converter.