Premium
Über das Verhalten eines zylindrischen Li‐Ionen Akkumulators unter abnormalen Bedingungen
Author(s) -
Kim S.,
Lee Y. S.,
Lee H. S.,
Jin H. L.
Publication year - 2010
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201000612
Subject(s) - separator (oil production) , thermal runaway , anode , projectile , battery (electricity) , battery pack , ion , materials science , lithium ion battery , thermal , electrochemistry , nuclear engineering , structural engineering , composite material , chemistry , engineering , thermodynamics , metallurgy , physics , electrode , power (physics) , organic chemistry
Li‐ion (lithium ion) secondary batteries are rechargeable batteries in which lithium ions move between the cathode and the anode. Lithium is not as safe as nickel cadmium (NiCd), and the Li‐ion battery can under some conditions increase in temperature and ignite abnormal conditions which includes overcharging, being subjected to an impact, or being hit by a projectile. Before studying causes of Li‐ion battery explosions, the term “abnormal condition” was defined. Next, to check the mechanical conditions, an impact test by a free falling object of 9.1 kg weight made of steel was carried out. After the impact test, the damage of the separator around the hollow of the jelly roll in the cell was observed. Following this, the same cell's electrochemical conditions were assessed through a heating test to determine the potential thermal runaway. Finally, to analyze the mechanical damage to the Li‐ion batteries during the charging and the impact test, a finite element analysis was performed using LS‐DYNA and ABAQUS software. A cylindrical type Li‐ion secondary battery was selected for the impact test, heating test, and simulation. The test and simulation results provided insights into the extent to which cylindrical cells can endure abnormal conditions.