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SINO TECHNOLOGY

Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .

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SUNBEAM

Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales

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GREEN POWER

Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc

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DATAPOWER

Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.

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SEONG-HEE

Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc

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STD

Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.

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Nickel Hydride No. 5.Research on safety issues of lithium batteries: internal short circuit model

release time:2024-03-12 Hits: Popular:AG11 battery

　　Background and purpose

　　Thermal runaway caused by internal short circuit is the main safety issue of lithium-ion batteries. Other safety issues may be controlled by electrochemical or mechanical methods.

　　The initial potential defects of the battery may not be easy to control. For example, the following factors lead to the final serious internal short circuit, including damage to the separator, metal dissolution and deposition, and residual metal impurities.

　　The thermal behavior of short circuits within lithium-ion battery systems is based on very complex factors such as the nature of the short circuit, capacity, battery electrochemical properties, electrical and thermodynamic design, system loading, etc.

　　Short circuit in the battery is a multi-physics, three-dimensional problem, related to the electrochemistry of the battery, thermal system, thermal abuse reaction kinetics, etc. Through simulation experiments, electrochemical reactions, heat release, heat reaction propagation, and countermeasures from process technology can be understood.

　　Research methods

　　By conducting 3D physical field simulation studies to describe internal short circuits and changes in short circuits over time, we can expand our understanding of NERL's electrochemical, thermoelectric, and abuse reaction kinetic models (as shown in the figure below). Multiphysics model simulations demonstrate that the heating model during a short circuit event is based on the nature of the short circuit and battery characteristics such as capacity and rate capability.

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