BATTERY UNIT

To provide a battery unit that can suppress a decrease in the cooling capacity of a battery cell located in the center of a battery stack in the stacking direction.SOLUTION: A battery unit having a structure in which a cooling plate is sandwiched between two battery stacks in which a plurality of battery cells are stacked includes a heat conductive sheet interposed between the cooling plate and a first surface facing the cooling plate of the battery stack, a facing member arranged so as to face the second surface opposite to the first surface of the battery stack, and an elastic body having a spring rigidity higher than that of the heat conductive sheet, which is interposed between the second surface of the battery stack and the facing member so as to correspond to at least the central portion in the stacking direction of the battery stack.SELECTED DRAWING: Figure 1 【課題】電池スタックの積層方向の中央部にある電池セルの冷却能力の低下を抑制することができる電池ユニットを提供すること。【解決手段】複数の電池セルが積層された２つの電池スタックによって冷却プレートを挟み込んだ構造を有する電池ユニットであって、電池スタックの冷却プレートに対向する第一面と冷却プレートとの間に介在する熱伝導シートと、電池スタックの第一面とは反対側の第二面に対向するように配置された対向部材と、電池スタックの積層方向の少なくとも中央部に対応させて、電池スタックの第二面と対向部材との間に介在する、熱伝導シートよりもばね剛性の高い弾性体と、を備える。【選択図】図１