PosterPDF Available

Control Concepts for a Decentralized Battery Management System Decentralized Battery Management System Global Control Level

September 2022

September 2022

Conference: 16th International Renewable Energy Storage Conference (IRES 2022)

Authors:

German Aerospace Center (DLR)

Linköping University

Technical University of Berlin

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Research Question Existing Control Strategies

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Control Concepts for a Decentralized

Battery Management System

Andrea Reindl1,3, Lars Eriksson2, Michael Niemetz1, Sangyoung Park3, Hans Meier1

1OTH Regensburg, 2Linköping University, 3TU Berlin

Abstract

Research Question Existing Control Strategies

Decentralized Battery

Management System

Li-Ion

Li-S

ZnMnO2

Li-FePo

Li-Ion

Li-S

Global Control Level

...

...

Decentralized, Droop-based Control Hierarchical, Communication-based Control

Local Control Level

Analog Control

I2C

Digital Control

andreareindl@ieee.org 16th International Renewable Energy Storage Conference (IRES 2022) Poster ID: 170

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ResearchGate has not been able to resolve any references for this publication.

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Decentralized Battery Management System with Customized Hardware Components

November 2021

With an increasing number of sold electric vehicles (EVs), a large number of used batteries will be at disposal. How to deal with these resources is one of the major challenges in reducing the environmental impact of batteries throughout their entire life cycle. Heterogeneous cell parameters due to the different usage histories are a challenge for second-life use. The effort and cost of ... [Show full abstract] remanufacturing required to test and assemble a new battery pack is a further concern. Systems that combine battery packs/modules without full reassembly offer advantages such as cost and reusability. A decentralized battery management system (DBMS) provides a suitable architecture for such systems involving different types of batteries. In this paper, an architecture for a decentralized, battery state-dependent control is shown. The proposed DBMS supports various types of batteries, is scalable and flexibly adaptable for a wide range of applications. Despite the significant advantages, there are increased requirements to meet for the hardware implementation and the applied control strategies. Therefore, the necessary hardware components and their requirements

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Control Concepts for a Decentralized Battery Management System to Optimize Reliability and Battery O...

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Battery systems are used in a wide range of safety-relevant applications, such as electric vehicles, unmanned aerial vehicles and home storage systems. Safety, reliability and availability of the battery system therefore play a key role. In addition, the useful service lifetime of the batteries determines the environmental impact and economic efficiency of the overall system. One possible ... [Show full abstract] solution is to give batteries a second life in applications with lower requirements in terms of dynamic behavior or capacity. Heterogeneous battery systems consist of batteries with differences in cell technology, age, capacity, and optimal operating range. To meet the safety, reliability, and availability requirements a scalable, Decentralized Battery Management System (DBMS) based on a distributed control system is proposed. Batteries, generators, and loads have Local Control Units (LCUs) consisting of a microcontroller, a measurement unit, and a DC/DC converter with adjustable voltage and current limits. These LCUs are the basis for the communication-based, cooperative system control and enhance the reliability and scalability of the battery system compared to conventional centralized structures. They record and manage the operating parameters and provide the basis for predictive energy management and battery residual value estimation. As a fallback strategy, a droop-based control of the DC/DC converters is used in addition to the communication-based one. Transition conditions between the control modes are defined and the control methods are compared and differentiated. The performance and the resulting benefits of batteries are determined by the control strategies. In this paper, the requirements for the control strategies for different operating modes, including startup, severe fluctuations of the DC power line voltage, and safe shutdown, are analyzed.