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Stand-Alone Battery Thermal Management for Fast Charging of Electric Two Wheelers - Integrated Busbar Cooling

Mayer, Bastian and Schier, Michael and Friedrich, Horst E. (2019) Stand-Alone Battery Thermal Management for Fast Charging of Electric Two Wheelers - Integrated Busbar Cooling. World Electric Vehicle Journal, 10 (2), p. 37. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/wevj10020037 ISSN 2032-6653

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Official URL: http://dx.doi.org/10.3390/wevj10020037

Abstract

This paper presents a thermal interface for cylindrical cells using busbar-integrated cooling channels. This interface is available due to the use of a stand-alone refrigerant circuit for the thermal management of the battery. A stand-alone refrigerant circuit offers performance and efficiency increases compared to state-of-the-art battery thermal management systems. This can be achieved by increasing the evaporation temperature to the requirements of the Li-ion cells and the use of alternative refrigerants. The solution proposed in this paper is defined for electric two-wheelers, as the thermal management of these vehicles is currently insufficient for fast charging where high heat losses occur. Three channel patterns for the integrated busbar cooling were examined regarding their thermal performance to cool the li-ion cells of a 16p14s battery pack during fast charging. A method of coupling correlation-based heat transfer and pressure drop with thermal finite element method (FEM) simulations was developed. The symmetric channel pattern offers a good compromise between battery temperatures and homogeneity, as well as the best volumetric and gravimetric energy densities on system level. Average cell temperatures of 22 °C with a maximum temperature spread of 8 K were achieved.

Item URL in elib:https://elib.dlr.de/127726/
Document Type:Article
Title:Stand-Alone Battery Thermal Management for Fast Charging of Electric Two Wheelers - Integrated Busbar Cooling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mayer, BastianBastian.Mayer (at) dlr.dehttps://orcid.org/0000-0002-4822-1609
Schier, MichaelMichael.Schier (at) dlr.deUNSPECIFIED
Friedrich, Horst E.Horst.Friedrich (at) dlr.deUNSPECIFIED
Date:4 June 2019
Journal or Publication Title:World Electric Vehicle Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:10
DOI :10.3390/wevj10020037
Page Range:p. 37
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2032-6653
Status:Published
Keywords:two-wheeler; thermal management; battery; busbar; thermal interface; Li-ion; fast charging
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Antriebssystem und Energiemanagement
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Vehicle Energy Concepts
Deposited By: Mayer, Bastian
Deposited On:04 Jul 2019 15:14
Last Modified:14 Oct 2019 09:03

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