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High Temperature Environment Led To SC30 18650 Battery Thermal Runaway Jul 01, 2017

SC30 18650 battery is widely used in various electronic components, such as notebook computers, cameras, mobile phones and so on, because of its high working voltage, high power density and energy density, long charge and discharge life, no memory effect and no pollution. In recent years, its application of electric vehicle power, renewable energy storage, communications network backup power, military reserve power and other large and medium-sized power or energy storage equipment / facilities expansion, lithium-ion battery is likely to become the 21st century leading green storage / For energy.

SC30 18650 The number in the battery represents the appearance size: 18 refers to the battery diameter of 18.0 mm, 650 refers to the battery height of 65.0 mm. 18650 lithium-ion battery life theory for the cycle of 1000 times, mainly for notebooks. In addition, because of the stability of the work in the very good performance, but also widely used in the field of electronics, commonly used in high-end flashlight, portable power, wireless data transmission, electric warm clothing, portable instrumentation and lighting equipment, portable printers, industrial equipment , Medical equipment and so on.

The safety of the SC30 18650 battery has been a major challenge to its further development, and the safety of the battery is ultimately reflected in the temperature. With the use of lithium-ion battery complexity of the occasion, lithium-ion battery exposed to high temperature environment is increasing, the external temperature continues to rise under the conditions, the battery internal temperature is also rising. Due to strong exothermic reaction and the sudden rise in battery temperature led to thermal runaway, it may cause fire, explosion and so on.

Domestic and foreign scholars have studied the thermal runaway of SC30 18650 battery, including the study of thermal stability of battery materials, exploring the mechanism of thermal runaway and seeking more secure battery materials. Hatchard, etc. through the establishment of lithium-ion battery one-dimensional hot oven model, predicted lithium ion battery in the oven abuse process of thermal behavior. Spotnitz and so on through the establishment of lithium-ion one-dimensional layered abuse model, simulated lithium-ion battery oven test and found that the negative electrode adhesive in the battery thermal runaway role in the process is very small. Kim et al. Developed a three-dimensional heat dissipation model of the SC30 18650 battery to simulate the evolution of the internal temperature field of cylindrical cylinders with different sizes in the oven at 155 ℃ and studied the diffusion process of the internal chemical reaction. Lai Pengfei et al. Established a numerical simulation of three - dimensional oven for cylindrical lithium - ion battery. The influence of temperature and charge state on the thermal runaway of the battery was studied, and a critical curve analysis method was proposed to determine the thermal safety of the battery. These theories and related tests provide a basis for understanding the thermal runaway of lithium-ion batteries in high-temperature environments. However, these studies are based on the oven test, and there are fewer aspects of the thermal runaway process of the lithium ion battery under constant heating power, The