Abstract: A battery module includes a battery cell stack including a plurality of battery cells stacked and arranged in a first direction; a module housing in which the battery cell stack is housed; and a deformation preventing structure disposed between the outermost battery cell of a plurality of battery cells and the module housing, wherein the module housing includes a housing plate including a space part and disposed adjacent to the outermost battery cell, the deformation preventing structure includes: a pressure plate fixed to the housing plate and supported on the battery cell stack; and a spring structure accommodated in the space part of the housing plate and disposed between the pressure plate and the housing plate. The space part is constituted by a recess portion provided on one side of the housing plate facing the battery cell stack.

Abstract: A wheel bearing assembly includes a wheel hub, at least one inner ring, an outer ring, and one or more rolling elements. An accommodation space may be formed inward of a vehicle-body-side end portion of the wheel hub to accommodate a constant velocity joint, and a plurality of recesses for accommodating rotating elements of the constant velocity joint are formed on an inner peripheral surface of the accommodation space to be spaced apart from each other along a circumferential direction. A first heat-treated hardened portion may be formed on the inner peripheral surface of the accommodation space, and may be formed to have portions with which the rotating elements of the constant velocity joint is brought into contact. A second heat-treated hardened portion may formed on an outer peripheral surface of the wheel hub. The first and second heat-treated hardened portions may not overlap each other.

Abstract: A wheel bearing assembly according to one embodiment of the present disclosure may comprise a wheel hub, at least one inner ring, an outer ring, and one or more rolling elements. According to one embodiment of the present disclosure, an accommodation space may be formed inward of a vehicle-body-side end portion of the wheel hub to accommodate a constant velocity joint, and a plurality of recesses for accommodating rotating elements of the constant velocity joint are formed on an inner peripheral surface of the accommodation space to be spaced apart from each other along a circumferential direction. According to one embodiment of the present disclosure, a first heat-treated hardened portion may be formed on the inner peripheral surface of the accommodation space, wherein the first heat-treated hardened portion may be formed to have portions with which the rotating elements of the constant velocity joint is brought into contact.