Home > Publications database > Degradation analysis of 18650 cylindrical cell battery pack with immersion liquid cooling system. Part 1: Aging assessment at pack level > print

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037 _ _ |a FZJ-2024-02584
082 _ _ |a 333.7
100 1 _ |a Koster, D.
|b 0
245 _ _ |a Degradation analysis of 18650 cylindrical cell battery pack with immersion liquid cooling system. Part 1: Aging assessment at pack level
260 _ _ |a Amsterdam [u.a.]
|c 2023
|b Elsevier
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520 _ _ |a Temperature is a fundamental factor when designing battery packs, therefore thermal management is essential to guarantee performance, safety, and lifetime in the application. In the first of a series of two papers, this work presents an experimental study of degradation of two identical 18650-battery packs with two different cooling systems, one with air cooling and one with a novel immersed cooling system. By means of cycling tests, the behavior of the two packs subjected to same degradation profiles but different cell temperature distribution is quantitatively and qualitatively analyzed. The results show that homogeneous temperature distribution can be kept up to a maximum temperature difference of 1.5 °C between the cells contained in the immersed-cooled pack against 15 °C between the cells included in the air-cooled pack. This generates an increase of capacity retention up to 3.3 % for the immersed-cooled pack after 600 cycles. Even though temperature is kept uniform, immersed cooled pack experienced cell failures, which were not presented in the air-cooled pack. Application-oriented analysis discusses possible merits and drawbacks of implementing such solution in the application, highlighting that in some cases a reduction up to 25 % of pack specific energy can be experienced when implementing immersed-cooling system.
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700 1 _ |a Marongiu, A.
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700 1 _ |a Chahardahcherik, D.
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700 1 _ |a Braun, C. F.
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700 1 _ |a Schulte, D.
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700 1 _ |a Figgemeier, E.
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773 _ _ |a 10.1016/j.est.2023.106839
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