Storage Battery Management Device with Dynamic SOC Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Storage batteries in power systems deteriorate over time, requiring frequent updates to state-of-charge (SOC) and temperature characteristics tables to maintain accurate SOC estimation and system performance.
Innovation Solution
A storage battery management device that includes a characteristics storage unit, acquisition unit, update unit, and estimation unit to store, acquire, update, and estimate SOC based on OCV and internal resistance characteristics, ensuring precise SOC estimation and system operation despite deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If storage battery characteristics tables are updated frequently to maintain accurate SOC estimation, then measurement precision is improved, but loss of time and operational complexity increase
Solution Approach 1:
The system performs preliminary actions by acquiring storage battery characteristics data during normal operation and storing it in advance. The characteristics update unit prepares updated characteristics tables before they are critically needed, so that when SOC estimation requires updates, the data is already ready, reducing the time loss during actual estimation operations.
Solution Approach 2:
The storage battery management device performs self-updating of its own characteristics tables using its own operational data. The acquisition unit collects characteristics during normal operation, and the update unit automatically processes this data to refresh the SOC estimation tables, eliminating the need for external manual updates and reducing operational time loss.
2Measurement precision
If storage battery characteristics tables are updated frequently to maintain accurate SOC estimation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system merges the characteristics acquisition function and characteristics update function into the existing SOC estimation workflow. The acquisition unit collects data during normal operation, and the update unit integrates with the storage battery management device's existing processing capabilities, combining multiple functions into a unified system rather than adding separate complex subsystems.
Solution Approach 2:
The management device performs multiple functions using the same hardware and software resources. The acquisition unit collects characteristics data that serves both immediate SOC estimation needs and future update requirements. The update unit processes this data to refresh estimation tables, making the system multi-functional without proportionally increasing device complexity.
3Reliability
If storage battery characteristics tables are updated to reflect deterioration, then reliability is improved, but loss of time in maintaining updates increases
Solution Approach 1:
The system maintains continuous useful action by acquiring storage battery characteristics during normal operation rather than requiring separate maintenance operations. The acquisition unit collects data continuously as the battery operates, and the update unit processes this data to maintain updated characteristics tables, ensuring reliability without interrupting battery service for maintenance tasks.
Solution Approach 2:
The system serves itself by automatically acquiring its own characteristics data during operation and automatically updating its own characteristics tables. The management device uses its own operational data to refresh its estimation parameters, eliminating the need for external maintenance personnel and time-consuming manual update procedures.
Data Source
AI summary
According to an embodiment, a storage battery management device includes: a memory configured to store therein storage battery characteristics of a storage battery unit as a storage battery characteristics table; and one or more processors coupled to the memory. The one or more processors are configured to: acquire the storage battery characteristics based on storage battery information output from the storage battery unit; update the storage battery characteristics table based on the acquired storage battery characteristics; and estimate SOC of the storage battery unit by referring to the updated storage battery characteristics table.