Method for controlling an energy storage system to influence the balancing of the system

By employing a control system to manage battery charge and discharge characteristics and adjust operating conditions, the method effectively addresses the imbalance issues in energy storage systems, enhancing performance and reducing costs.

WO2025064790A1 Publication Date: 2025-03-27FLUENCE ENERGY LLC
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Patent Information

Application Number
PCT/US2024/047650
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-22
Filing Date
2024-09-20
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Existing energy storage systems face challenges in balancing battery states of charge, leading to performance inefficiencies and increased costs due to stranded energy and limited capacity, as well as higher service costs from disconnection faults.

Method used

The method involves using a control system to receive and store battery charge and discharge characteristics, and then running the battery storage elements at selected operating conditions to reduce imbalances in state of charge among the battery storage elements of an energy storage node.

Benefits of technology

This approach reduces stranded energy, enhances energy capacity, lowers service costs, and improves system performance by minimizing disconnection faults and maintaining better balance within the energy storage system.

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Abstract

An energy storage system comprises an energy storage node that includes a plurality of battery storage elements and a control subsystem to receive battery data from the battery storage elements. The energy storage system further includes a power conversion system (PCS) and a control system coupled to the energy storage node and the PCS. The control system, the control subsystem, or both are configured to: receive or store battery charge and discharge characteristics of the battery storage elements during a plurality of operating conditions of the battery storage elements, the PCS, or both; and run the battery storage elements of the energy storage node at one or more selected operating conditions of the plurality of operating conditions based on the battery charge and discharge characteristics to reduce an imbalance in state of charge among the battery storage elements of the energy storage node.
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