Sensor unit and sensor unit-equipped battery wiring module

Abstract

A sensor unit includes: a conductive path structure; a sensor element; a lower housing including a sensor element accommodation part; a coil spring; and an upper housing. The lower housing includes a support portion, and the upper housing includes a positioning protrusion that protrudes in the shape of a tapered tube toward the lower housing, and is inserted into another end of the coil spring in the axial direction. The lower housing is displaceable toward the positioning protrusion, the coil spring includes an engagement projection that projects to the inner circumferential side thereof so as to be deflectable and deformable. The positioning protrusion has a receiving recess, and the engagement projection is received and locked in the receiving recess, so that the coil spring is held by the upper housing.