Patent ID: 9488562
Filing Date: 2016-11-08
CPC Classification: G01M,G01N

Claim Text:
1. A method, comprising: positioning a battery pack within an internal space of a test enclosure, the battery pack including an outer casing; positioning a tip of a plunger proximate to a top surface of the outer casing, wherein the plunger extends from within the internal space to a location external to the test enclosure and is moveable relative to the test enclosure in a first direction toward the battery pack; causing a first impact between a mass disposed opposite to the plunger and a piece of material having a known strain rate coupled to the plunger, the piece of material being disposed external to the test enclosure, wherein: determining a displacement of the plunger, caused by the first impact, at the failure point of the outer casing; determining a force applied to the piece of material, by the mass, at the failure point of the outer casing; and determining a dynamic strength (σ(ε) of the outer casing or a dynamic modulus (M(ε) of the outer casing, wherein the dynamic strength is determined as a function of the strain rate and the force applied to the piece of material and the dynamic modulus is determined as a function of the strain rate and the displacement of the plunger.