A battery device comprising: a battery frame; and a battery module disposed on the battery frame, wherein the battery frame comprises: a base member; a slide base being disposed on an upper surface of the base member and being formed in a rectangular shape defined by a pair of first sides extending in a first direction and a pair of second sides extending in a second direction in a plan view; a plurality of metal springs being mounted on an upper surface of the slide base at intervals along the first direction of the slide base, and being extensible in a vertical direction; a support plate being connected to upper sides of the plurality of springs and having an upper surface on which the battery module is supported; and a stopper being disposed at a position between the upper surface of the slide base and a lower surface of the support plate and different from positions where the plurality of springs is disposed, wherein the stopper is not in contact with the support plate when the plurality of springs is in an initial state, and is in contact with the support plate when the plurality of springs is compressed by a predetermined length from the initial state. a battery frame; and a battery module disposed on the battery frame, wherein the battery frame comprises: a base member; a slide base being disposed on an upper surface of the base member and being formed in a rectangular shape defined by a pair of first sides extending in a first direction and a pair of second sides extending in a second direction in a plan view; a plurality of metal springs being mounted on an upper surface of the slide base at intervals along the first direction of the slide base, and being extensible in a vertical direction; a support plate being connected to upper sides of the plurality of springs and having an upper surface on which the battery module is supported; and a stopper being disposed at a position between the upper surface of the slide base and a lower surface of the support plate and different from positions where the plurality of springs is disposed, wherein the stopper is not in contact with the support plate when the plurality of springs is in an initial state, and is in contact with the support plate when the plurality of springs is compressed by a predetermined length from the initial state. a base member; a slide base being disposed on an upper surface of the base member and being formed in a rectangular shape defined by a pair of first sides extending in a first direction and a pair of second sides extending in a second direction in a plan view; a plurality of metal springs being mounted on an upper surface of the slide base at intervals along the first direction of the slide base, and being extensible in a vertical direction; a support plate being connected to upper sides of the plurality of springs and having an upper surface on which the battery module is supported; and a stopper being disposed at a position between the upper surface of the slide base and a lower surface of the support plate and different from positions where the plurality of springs is disposed, wherein the stopper is not in contact with the support plate when the plurality of springs is in an initial state, and is in contact with the support plate when the plurality of springs is compressed by a predetermined length from the initial state.