Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs

Fares, Ahmed and Klumpner, Christian and Sumner, M. (2017) Optimising the structure of a cascaded modular battery system for enhancing the performance of battery packs. In: 9th International Conference on Power Electronics, Machines and Drives, 17-19 April 2018, Liverpool, UK. (In Press)

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Abstract

The overall performance of battery packs may be affected by imbalances between the series connected cells which is more likely in packs with high number of cells needed to provide a high voltage as needed for example in electric vehicles. In this case, the overall capacity and power capability of the pack is limited by the weakest cell in the stack which results in incomplete utilization of the pack’s capabilities. In traditional centralized battery systems (TCBS), this is addressed by implementing cell active/passive balancing circuitry/techniques which restore some of the pack’s energy capability. This paper proposes the use of cascaded modular battery systems (CMBS) to remove the need for extra balancing circuitry and maximises the performance and reliability of a battery system containing unequal matched/aged cells. The analysis is assessing the CMBS overall system efficiency, reliability and weight compared to the TCBS for a design of a 300V/3.6kW battery system as a case study.

Item Type: Conference or Workshop Item (Paper)
Keywords: Battery chargers; Battery management; Battery equalization; Modular battery systems; Lithium batteries
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Electrical and Electronic Engineering
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Depositing User: Klumpner, Dr Christian
Date Deposited: 30 Jan 2018 15:33
Last Modified: 30 Jan 2018 15:37
URI: http://eprints.nottingham.ac.uk/id/eprint/49430

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