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عنوان فارسی مقاله:
مدل محاسباتی یکپارچه موضوع باتری لیتیوم-یون به نفوذ میخ
عنوان انگلیسی مقاله:
Integrated computation model of lithium-ion battery subject to nail penetration
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The sales of electrical vehicles (EVs) have increased in the last few years [1], and lithium-ion batteries (LIBs) have been regardedas promising alternative energy sources for use in EVs [2,3]. LIB safety has become one of the main topics with regard to passenger safety because LIBs are frequently used in vehicles [4,5]. A thermal management system (TEM) is generally used to prevent overheating [6–8], but a short circuit may produce a significant amount heat that may cause thermal runaway [9]. Nail penetration, which mimics the penetration of foreign objects into LIB during use, has become a standard LIB safety evaluation method [10]. The immediate consequences of nail penetration include the occurrence of internal short circuit, which has potentially catastrophic consequences, such as fire and explosion [11–13]. In general, engineers must perform time-consuming and hazardous nail penetration tests [10,14]. These tests involve inserting a steel nail into LIB, thereby bridging the positive and negative electrodes within the jellyroll and causing local internal short circuit among the component interfaces of the nail and the jellyroll. Although nail penetration is essentially a mechanical loading process, it may involve electrochemical and thermal behaviors, which result from the strong entanglement of the multiphysical fields within the battery. Thus, a reasonable modeling framework is urgently required to understand and control the complicated mechanisms of a nail penetration-induced thermal runaway or fire. Numerical modeling is an ideal substitution for real-world nail penetration testing. First, pioneering efforts have been made to understand the mechanical behavior of LIBs that are subjected to physical abuses, e.g., radial compression [15,16], indentation [15,17], and bending [15] loads. The constitutive model for the jellyroll was first established by Greve and Fehrenbach [15] and Sahraei et al. [18] through homogeneous isotropic material treatment. Since then, Lai et al. [16] developed a representative volume element (RVE) model that considered each component of the jellyroll. Recently, an anisotropic model with coupled strain rate and state of charge (SOC) dependencies was proposed in Ref. [19]. Second, with regard to electrochemical behavior, a 1D battery model wasfirst proposed by Newman et al. [20,21]. At present, such model is generally accepted as one of the most effective and accurate battery models. To improve the calibration of this battery model, the electrochemical properties of the cathode [11,22–24], anode [24–26], electrolyte [27,28], and separator [24,26] have been comprehensively studied. Third, internal short circuits have four types, as first discussed by Santhanagopalan et al. [29]. Fang et al. [11,30] conducted a numerical investigation of LIB short circuits using 3D model coupling that accounted for electrochemical and thermal influences. Recently, Chiu et al. [10] modeled thermal runaway behavior during the nail penetration process. Fourth, multiphysical simulations of LIBs have been developed by researchers [14,31–33]. These simulations typically involve electrochemical– thermal coupling [11,31,32] or individual jellyroll components [34–36]. By contrast, Zhang et al. [37] were the first to suggest using a coupled mechanical–electrochemical–thermal method to study short circuit behavior under a mechanical load.
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کلمات کلیدی:
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