锂离子电池套管加热工艺及加热故障研究

Research on Heating Process and Heating Defect of Lithium Ion Battery Casing

利用有限元分析软件ANSYS对某锂离子电池套管加热工艺及加热故障进行了数值模拟研究,并对胶管进行了加热收缩试验研究.结果表明,加热时胶管的温度都是由胶管中部向两端逐渐降低;随着加热温度的升高,胶管的温差逐渐增大;合理的加热温度范围为（130～210）℃;加热故障不仅会导致胶管受热收缩质量不合格,而且会导致锂离子电池因温度过高而被损坏,甚至发生燃烧和爆炸;模拟结果与试验结果一致,表明所建立的胶管加热有限元分析模型是合理可靠的.

The heating process and heating defects of lithium ion battery casing were analyzed based on the finite element analysis software, ANSYS, and the corresponding heating process experiments were carried out. The results show that the temperatures of all rubber sacs reduce gradually from centre to both ends during heating; the temperature difference of rubber sac increases gradually with the increase of heating temperature; the range of reasonable heating temperature is 130-210℃; not only the shrinkage defects of rubber sac easy occurs, but also the damage or even burning and explosion of lithium ion battery occurs under the high temperature; the simulation results conform well with the experimental one, it indicate that the finite element analysis model of rubber sac heating established is reasonable and reliable.