Thermal management investigation for lithium-ion battery module with different phase change materials

Wang, Ziyuan; Li, Xinxi; Zhang, Guoqing; Lv, Youfu; Wang, Cong; He, Fengqi; Yang, Chengzhao

doi:10.1039/c7ra08181b

Cited by 61 publications

(18 citation statements)

References 43 publications

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“…As is known, the ascending of the electrochemical resistance will inevitably result in a sharp rise of the discharge temperature and heat generation according to Joule's law Q = I 2 R battery t, especially for an increasing peak temperature and inhomogeneous temperature distribution, easily leading to TR. 33 Hence, the heat generation behaviors were produced by employing the temperature-testing equipment. As shown in Figure 7, the temperature responses triggered by the overcharge were investigated under various environment conditions.…”

Section: Heat Generation Behavior Evaluationmentioning

confidence: 99%

Experimental investigation on the essential cause of the degrading performances for an overcharging ternary battery

Zhang

et al. 2020

Int J Energy Res

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Summary Ternary power batteries, as the mainstream power sources of electric vehicles, are liable to inducing thermal runaway (TR) with respect to their sensitivity to abusive conditions. Among various abuse conditions, the overcharge of a battery has been considered as the most common and severe case giving rise to thermal safety accidents. In this study, an overcharged battery and a normal battery, both using ternary/graphite electrodes, were investigated and analyzed synergistically through thermal behaviors and electrochemical characteristics. Initially, a series of electrochemical parameters including charge and discharge voltage plateaus, discharged capacity and time at different discharge rates, and internal resistances were carried out. Then, the heat generation behaviors between normal and overcharged batteries were evaluated. Furtherly, the interconnectedness with the electrochemical capacity degradation and heat generation aggravation of the ternary battery after overcharge was analyzed. Besides, the essential causes of the deterioration of electrochemical properties and severe heat behaviors resulting from overcharge were intensively analyzed via microscopic perspectives. In addition, the electrochemical characteristics fading of abused ternary battery triggered by overcharge were investigated, especially under higher temperature (55°C) and ultralow temperature (−20°C) conditions. Therefore, for an overcharged battery, this research not only elaborates the essential causa of the degraded electrochemical and anabatic thermal performance from a materials and thermal science perspective but also provides a foundation for further promoting the safety properties of commercialized power batteries with ternary chemical systems.

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Section: Heat Generation Behavior Evaluationmentioning

confidence: 99%

Experimental investigation on the essential cause of the degrading performances for an overcharging ternary battery

Zhang

et al. 2020

Int J Energy Res

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“…Heat production also changes with time and temperature. The x , y , z coordinates of battery heat flux can be described as follows based on the complex characteristics of the orthotropic materials during the charging/discharging processes 33,34 :

q_{x} goodbreak= goodbreak- λ_{xx} \frac{\partial T}{\partial x} goodbreak- λ_{xy} \frac{\partial T}{\partial y} goodbreak- λ_{xz} \frac{\partial T}{\partial z},

q_{y} goodbreak= goodbreak- λ_{yx} \frac{\partial T}{\partial x} goodbreak- λ_{yy} \frac{\partial T}{\partial y} goodbreak- λ_{yz} \frac{\partial T}{\partial z},

q_{z} goodbreak= goodbreak- λ_{zx} \frac{\partial T}{\partial x} goodbreak- λ_{zy} \frac{\partial T}{\partial y} goodbreak- λ_{zz} \frac{\partial T}{\partial z} .

…”

Section: Methodsmentioning

confidence: 99%

“…Heat production also changes with time and temperature. The x, y, z coordinates of battery heat flux can be described as follows based on the complex characteristics of the orthotropic materials during the charging/discharging processes 33,34 :…”

Section: Governing Equationsmentioning

confidence: 99%

Experimental investigations on the correlations between the structure and thermal‐electrochemical properties of over‐discharged ternary/ Si‐C power batteries

Zhang

et al. 2021

Intl J of Energy Research

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Summary The thermal safety of power lithium‐ion batteries (LIBs) has seriously affected the booming development of electric vehicles (EVs). Especially, owing to the requirement of high energy density, thermal runaway (TR) easily occurs in LIBs, resulting in a higher heat generation rate. Over‐discharging is recognized as a common cause for TR. In the present research, the correlations between the structure and thermal‐electrochemical properties of an over‐discharged ternary/Si‐C battery at room and high temperatures were investigated. The heat generation mechanisms of the batteries due to the maximum surface temperature and peak temperature difference variations during fast charging and discharging processes were investigated. Moreover, the electrochemical performances parameters of the batteries, such as voltage changing trend, discharge time, discharge capacity, internal resistance, electrochemical impedance spectroscopy (EIS) spectra, were analyzed. When the battery was discharged at 2.0C and 55°C, its maximum temperature and highest temperature difference reached 91.34°C and 13.24°C, respectively, finally resulting in a sharp decline in electrochemical performance. Furthermore, the root reasons for performance degradation and heat generation intensification of the over‐discharged battery were analyzed by scanning electron microscopy and X‐ray diffraction. The cause of the aforementioned phenomenon is due to irreversible damage to the electrode materials. This research not only reveals the relevant relationship between the thermal behavior and the microscopic structure of the over‐discharged ternary/Si‐C battery under various temperature conditions but also provides valuable insights for improving the safety of LIBs modules even packs.

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“…For free convection in the experiment, the governing equations of the conservation of mass, energy, and momentum are given as follow. (18) Conservation of mass:…”

Section: Thermal Battery Modelingmentioning

confidence: 99%

Improvement of Thermal Performance of Electric Vehicle Battery Pack with Phase-change Material

Angani¹,

Kim²,

Shin³

2020

Sensors and Materials

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In this study, we analyzed the thermal performance of electric vehicle lithium batteries with phase-change materials (PCMs) at 26 °C. PCMs and temperature sensors are the major factors affecting the thermal performance. To improve the heat transfer rate of PCMs in a lithium polymer pouch battery with 16 Ah capacity, a battery thermal management system with different PCMs, namely, RT15, RT31, EG5, and EG26, is proposed and experimentally investigated. The results show that the temperature of the battery surface without PCMs increased to 35.9 °C at different discharge rates at a room temperature of 25 °C. In the case of the battery with EG26, its surface temperature was 30.5 °C, which shows a temperature difference of 5.4 °C from the battery without a PCM. A low temperature-rise rate and a uniform temperature distribution were observed in the batteries with PCMs. In addition, a numerical simulation using the computational fluid dynamics software FLUENT was also carried out. The numerical simulation results are in good agreement with experimental data, such as the temperatures of batteries monitored with sensors.

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Thermal management investigation for lithium-ion battery module with different phase change materials

Abstract: In battery thermal cycle tests PCM 3 prolonged the service life of PCM because the epoxy can effectively prevent leakage of paraffin during phasing change.

Cited by 61 publications

References 43 publications

Experimental investigation on the essential cause of the degrading performances for an overcharging ternary battery

Experimental investigation on the essential cause of the degrading performances for an overcharging ternary battery

Experimental investigations on the correlations between the structure and thermal‐electrochemical properties of over‐discharged ternary/ Si‐C power batteries

Improvement of Thermal Performance of Electric Vehicle Battery Pack with Phase-change Material

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