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Nail penetration test

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posted on 2021-04-05, 02:11 authored by Noriko Kasai, Makoto Kato, Naoya Ishida, Naoto Kitamura, Yasushi Idemoto
For the nail penetration test, three types of pouch cells with different separators were assembled. The positive electrode is LiMn1/3Ni1/3Co1/3O2, the negative electrode is graphite, and the separator is PP-PE-PP or coated PE or coated nonwoven. At the fully charged state of 4.3V, a 4.5mm diameter nail was pushed into the cell at a penetration speed of 20mm/s. The results of the nail penetration test varied significantly depending on the type of separator.


Manuscript title

Safety Test Methods Simulating Internal Short Circuit and the Mechanism for Safety Improvement of Li-ion Batteries by Heat Resistant Separators


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