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- W4362661652 abstract "The safety and reliability of lithium-ion battery system is the main safeguard promoting widespread applications. However, the reliability assessment of the battery system is still insufficient due to dynamic changes and ageing propagation between cells. To evaluate the reliability of battery system accurately, an improved reliability assessment method integrating the multi-physics model and universal generating function (UGF) method is proposed, taking imbalanced current and uneven cooling into account. In the multi-physics model, an electric-thermal-flow-ageing coupling model is established. The UGF-based method is employed to evaluate the multi-state system reliability of battery system. Based on the reliability method, the interaction influence of imbalanced current and uneven cooling on the reliability of the battery system is analyzed contrastively. To explore the influence of parallel cells on reliability, different redundancy strategies are evaluated and analyzed. Meanwhile, suitable uneven cooling schemes are studied. The results show that the degradation rate of cells is accelerated while incorporated the imbalanced current and uneven cooling. Compared with the traditional reliability assessment, the maximum reliability deviation reaches approximately 1780 cycles. Unlike initial assumption, increasing the parallel cells does not always improve the reliability of battery packs due to the improvement of probability of current imbalance." @default.
- W4362661652 created "2023-04-07" @default.
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- W4362661652 date "2023-08-01" @default.
- W4362661652 modified "2023-10-16" @default.
- W4362661652 title "An improved reliability assessment method for lithium-ion battery system considering imbalanced current and uneven cooling" @default.
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- W4362661652 doi "https://doi.org/10.1016/j.energy.2023.127424" @default.
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