Abstract: The power storage device includes a plurality of power storage stacks, a case, and a protective structure that protects a plurality of power storage cells from a load applied to the case in the vertical direction. The case has a bottom wall, a top wall, and a circumferential wall. The protective structure has a cross member, and a load transfer member located on the cross member. The load transfer member has at least one contact portion that is compressible and deformable in an orthogonal direction, and contacts a pair of power storage stacks adjacent to each other in the orthogonal direction when being in a compressed state.

Abstract: A power storage device includes: a power storage stack including a first cell group, a second cell group, and a middle plate; a lower case having a bottom wall portion; a first heat conduction member disposed between the first cell group and the bottom wall portion; and a second heat conduction member disposed between the second cell group and the bottom wall portion. The lower case includes a pedestal portion supporting the middle plate, and the first heat conduction member and the second heat conduction member are provided to contact the pedestal portion.

Abstract: A power storage device comprises: a power storage stack; an accommodation case that has a bottom wall portion and accommodates the power storage stack therein; and an adhesive layer that has thermal conductivity and fixes the power storage stack to the bottom wall portion. The bottom wall portion includes a receiving portion that has a receiving surface on which the power storage stack is received, a lower wall portion located at a position lower in level than the receiving surface, and a connecting portion that interconnects the receiving portion and the lower wall portion. The adhesive layer includes a portion disposed between the receiving surface and the power storage stack, and a protruding portion that protrudes from the receiving surface to the connecting portion.