Analysis of the Thermal Conditions in a Lithium-Ion Battery Pack at Reduced Heat Exchange Rate with the Environment

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
G. V. Kuznetsov, E. V. Kravchenko
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引用次数: 0

Abstract

The use of chemical current sources (CCS) in large stationary electrical energy storage systems (EES) is impossible without solving the problem of their thermal runaway. The runaway may be due to exponential temperature rise in major operating components of the battery. One of the factors that increase electrode and electrolyte temperature in a battery is its lower heat exchange with the environment. This study performs a numerical analysis of the thermal conditions in a Li-ion battery pack at moderate values of external factors affecting the thermal runaway and typical discharge rates for this type of CCS. Thermal resistance between Li-ion battery and the battery pack case was found to greatly reduce heat exchange with the environment. The temperature difference across the battery pack in a practically significant range of variables was from 2 to 16°С. At the same time, the characteristic temperature exceeded in a number of cases its regulated limit value, which created the risk of the battery’s thermal runaway.

Abstract Image

降低与环境热交换率时锂离子电池组的热条件分析
如果不解决化学电流源的热失控问题,在大型固定式储能系统中使用化学电流源是不可能的。失控可能是由于电池主要工作部件的指数温度上升。电池中电极和电解质温度升高的因素之一是其与环境的热交换较低。本研究对影响该类型CCS的热失控和典型放电速率的外部因素的中等值下锂离子电池组的热条件进行了数值分析。发现锂离子电池与电池组外壳之间的热阻大大减少了与环境的热交换。在实际显著的变量范围内,电池组的温差从2°到16°С。同时,在许多情况下,特征温度超过了其规定的限值,这就造成了电池热失控的危险。
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来源期刊
Technical Physics
Technical Physics 物理-物理:应用
CiteScore
1.30
自引率
14.30%
发文量
139
审稿时长
3-6 weeks
期刊介绍: Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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