Abstract
As a key issue in EVs (Electric Vehicles) development, Li-ion battery’s thermal safety is focused on in which the thermal abuse model is an important tool. This paper has established a 3-D electro-thermal model taking side reaction into account, in order to study on MGL100Ah lithium manganite battery’s safety issue. This paper firstly states the mechanism of heat generation, types of thermal model, and the mesh model, then analyzes the simulation on the model under the short circuit condition, one of thermal abuse condition. On one hand, the paper verifies the liability of the model, so as to apply the model on other thermal abuse condition in the future; on the other hand, the paper discusses in detail the internal temperature distribution, voltage and current changes under the short circuit condition. Analyzing this typical safety issue in details, this paper can help reduce cost, raise design efficiency and avoid thermal abuse in future development of battery.
Highlights
The vehicle industry has developed rapidly and become biggest industry in many large industrial countries since the 21st century
This paper mainly studies on the safety issue under short circuit condition, and predicting the thermal behavior under condition
This paper built a 3D electro-thermal model according to MGL100Ah lithium manganite battery which is commonly used
Summary
The vehicle industry has developed rapidly and become biggest industry in many large industrial countries since the 21st century. Many researchers from different institutes has studied much on Li-ion battery’s abuse: Hatchard et al mainly focused on small-scale Li-ion batteries (e.g. 18650 cylinder battery) and their abuse simulation; Kim et al from National renewable energy laboratory extended that into 3D abuse model and carried out simulation in depth on oven test In this field the study on large-scale battery has not been carried out yet, especially under external short circuit condition. This paper mainly studies on the safety issue under short circuit condition, and predicting the thermal behavior under condition Using this model we expect that the cost in battery development will be decreased and the design efficiency will be raised, what’s more, achieve the goal of reducing thermal abuse by controlling temperature
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