Water Condensation in Traction Battery Systems

Kim, W, Steger, F, Kotak, B, Knudsen, P, Girgsdies, U and Schweiger, H 2019, 'Water Condensation in Traction Battery Systems', Energies, vol. 12, no. 6, 1171, pp. 1-17.


Document type: Journal Article
Collection: Journal Articles

Title Water Condensation in Traction Battery Systems
Author(s) Kim, W
Steger, F
Kotak, B
Knudsen, P
Girgsdies, U
Schweiger, H
Year 2019
Journal name Energies
Volume number 12
Issue number 6
Article Number 1171
Start page 1
End page 17
Total pages 17
Publisher MDPI
Abstract Lithium-ion traction battery systems of hybrid and electric vehicles must have a high level of durability and reliability like all other components and systems of a vehicle. Battery systems get heated while in the application. To ensure the desired life span and performance, most systems are equipped with a cooling system. The changing environmental condition in daily use may cause water condensation in the housing of the battery system. In this study, three system designs were investigated, to compare different solutions to deal with pressure differences and condensation: (1) a sealed battery system, (2) an open system and (3) a battery system equipped with a pressure compensation element (PCE). These three designs were tested under two conditions: (a) in normal operation and (b) in a maximum humidity scenario. The amount of the condensation in the housing was determined through a change in relative humidity of air inside the housing. Through PCE and available spacing of the housing, moisture entered into the housing during the cooling process. While applying the test scenarios, the gradient-based drift of the moisture into the housing contributed maximum towards the condensation. Condensation occurred on the internal surface for all the three design variants.
Subject Hybrid Vehicles and Powertrains
Energy Generation, Conversion and Storage Engineering
Keyword(s) Traction battery system
Condensation
Durability test
Pressure compensation element
Behavior of an enclosed system
DOI - identifier 10.3390/en12061171
Copyright notice © 2019 by the authors.This article is an open access article.
ISSN 1996-1073
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