Mechanical response of square lithium-ion battery under different compression loadings
In order to realize the requirements of safety protection design of power battery under mechani-cal abuse,the mechanical response characteristics of square lithium-ion battery under different extrusion loadings were studied in this paper.First,the plane compression and local indentation tests of square lithi-um-ion battery are carried out,and the extrusion mechanical response and internal structure failure mecha-nism of the battery are given.Then,the finite element model of square lithium-ion battery is established,the force displacement curves of the battery under different extrusion loads are studied,and the effects of different extrusion forms on the mechanical response of lithium-ion battery are discussed.The results show that the finite element analysis results are basically consistent with the experimental results.Plane com-pression will lead to in-plane fracture mode caused by tension inside the battery,while local indentation will lead to interlaminar fracture mode caused by shear.The mechanical response of lithium-ion battery un-der different extrusion loads is affected by the size of compression head.With the decrease of the indenter size,the load and failure displacement of the battery will decrease differently.
NETL
NSTL
万方数据
