Sensor for detecting deformation of sealed secondary battery

Abstract

A sensor for detecting a deformation of a sealed secondary battery, comprising a polymer matrix layer and a detection unit, wherein the sealed secondary battery has at least one cell comprising a group of electrodes, and an external packaging body in which the electrode group is held, the polymer matrix layer is located inside the external packaging body, and contains a filler in a dispersed state, this filler giving a change to an external field in response to a deformation of the polymer matrix layer, and the detection unit is located outside the external packaging body to detect a change of the external field, the polymer matrix layer is a pressure-sensitive-adhesive-layer-attached polymer matrix layer having a pressure-sensitive-adhesive layer laminated on at least one surface of this polymer matrix layer.

Dependencies are inferred from the claim text.