An exemplary traction battery assembly includes, among other things, a first portion of an enclosure, a second portion of the enclosure, and a compression limiter. The first portion is overmolded to the compression limiter. An exemplary method includes, among other things, securing a first portion of an enclosure for a traction battery to a second portion, and limiting compression of the first portion during the securing using a compression limiter. The first portion is overmolded to the compression limiter.