DEFORMATION-DETECTING SENSOR FOR SEALED SECONDARY BATTERY

A deformation detecting sensor for a sealed secondary battery of the present invention includes a resin layer which changes its property in association with deformation of a portion to be measured, the resin layer having an elastic modulus within the range of 0.01-10 MPa. It can be possible to detect bulging of the sealed secondary battery without lowering the degree of freedom in designing the structure of the sealed secondary battery.