Internal short circuit testing method and internal short-circuit testing device

摘要

PROBLEM TO BE SOLVED: To provide an internal short circuit test method and an internal short circuit test device capable of restraining internal short circuit, occurring in a battery, conveniently with high repeatability, while preventing the surrounding of a pressurizing part from damaging the cell surface.SOLUTION: In an internal short circuit test method of a battery including a laminate of a positive electrode plate and a negative electrode plate laminated via a separator, where the laminate is housed in an exterior coating, internal short circuit is generated in the battery by compressing the battery by a compression part including a compression plate having a relief shape at least around a compression surface for compressing the battery, and a protrusion protruding from the compression plate by a length corresponding to a prescribed number of internal short circuit layers and piercing the battery.SELECTED DRAWING: Figure 1