Study on the failure behavior of the current interrupt device of lithium‐ion battery considering the effect of creep

Abstract

The working condition of the CID (current interrupt device) has an important impact on the safety of the prismatic lithium-ion batteries. One of the important factors that causes the failure of the prismatic power battery is the overturning of CID due to material creep. The tensile and creep tests of the MFX2 aluminum alloy which is the material of CID were designed. Based on the experimental data the isotropic hardening multilinear elastic-plastic constitution and creep constitution at the battery working temperature were established. The constitutions were also verified by the notch test. The finite element model of the CID and the cap was established to analyze the effect of creep on the failure behavior of the CID throughout life. The simulation tests in the constant temperature and constant load of CID is designed. The simulation results showed that the constitution characterizes the basic mechanical properties of the CID reasonably. During the life of the CID, the creep behavior would go through the fast stage firstly and then fall into the slow steady-state stage. The creep effect of the material would cause the CID to overturn in advance, overturning pressure would be reduced, the life of the power battery would also be reduced.

Key Challenges for Grid‐Scale Lithium‐Ion Battery Energy Storage

“…Research in these fields has risen rapidly in recent years, but technologies are still immature. Topics of interest include safety vents, [ 54 ] current interrupt device, [ 55 ] positive temperature coefficient device, [ 56 ] shutdown separator, [ 57 ] gas sensors, [ 58 ] battery management systems [ 14 ] and their integration with energy/power management systems, [ 24 ] and cell compartmentation (cell spacing and physical barriers [ 59 ] ). Fire suppression is another emerging field of research, which is nontrivial since LIB fires differ drastically from traditional fires, due to factors such as lithium's high reactivity with water, explosion risk of the battery, un‐necessity of external oxygen supply to maintain a LIB fire, and emission of toxic fluoride gases.…”

A Review of Mechanical and Chemical Sensors for Automotive Li-Ion Battery Systems

“…Suddenly, the electrical circuit is interrupted; no electricity can pass through the system, and the electrochemical reactions inside the cell are arrested. Such systems are widely implemented in cylindrical cells, but several applications in prismatic cells are also reported [10]. Another useful passive safety element present inside commercial cells is commonly known as PTC (Positive Temperature Coefficient) device [11].…”

A novel interval‐based formulation for optimal scheduling of microgrids with pumped‐hydro and battery energy storage under uncertainty

“…However, high-energy density technologies are not mature yet and depositions of some metals like lithium may be environmentally harmful. 5 To circumvent the limitations of battery energy storage (BES) facilities, different storage technologies may be combined in order to jointly exploit the advantages of each one. 6 In this regard, pumped-hydro storage (PHS) units, although less efficient, are able to provide large-scale storage capacity, being so an ideal complement to batteries, enabling a more efficient management of renewable sources.…”