Disclosed is a secondary battery including a case configured to surround an exterior of an electrode assembly, and a strain sensor attached to an exterior of the case to detect deformation of the case. The strain sensor may include a backing part attached ...

Disclosed is an electrochemical cell in the form of a bag (1.1), constituting an electric battery (1), which comprises a sensor (2) fixed to the outside surface of the bag (1.1) and comprising: at least one sensing element (2.1.1, 2.1.2); at least one cond...