nail penetration test
A safety test for batteries where a nail is driven into the cell to check for fire or explosion. Technical term used in battery engineering and safety standards.
A nail penetration test was conducted to verify the safety of the lithium-ion battery.
Standard spelling for the battery nail penetration test.
Variant with irregular okurigana usage; less common but still encountered.
Compound of 釘 (kugi, 'nail'), 刺し (sashi, 'piercing'), and 試験 (shiken, 'test').