Abstract: An electricity storage module includes a plurality of electricity storage cells, a plurality of resin frames, and a bus bar module. Each of the electricity storage cells includes a pair of external terminals. The bus bar module includes a plurality of bus bars and a bus bar case. The resin frame includes a retaining portion configured to retain the bus bar case. The bus bar case includes a retained portion that is configured to engage with the retaining portion, and a biasing portion that is configured to bias the bus bar toward a side of the retained portion, in a state in which the retained portion is engaged with the retaining portion.

Abstract: The present disclosure provides a cell stack having a rectangular parallelepiped shape, a plurality of rectangular cells being stacked in the cell stack, and each of the rectangular cells including a terminal provided in an end face thereof in a longitudinal direction. The cell stack includes a plate-like bus bar configured to electrically connect the terminals of the adjacent rectangular cells to each other. The bus bar includes a first slit extending in a stacking direction of the rectangular cell so that at least a part of the first slit overlaps an area that straddles a pair of welded parts welded to the respective terminals of the adjacent rectangular cells, and a second slit extending in parallel with the first slit outside the area that straddles the pair of the welded parts. A width of the first slit is larger than a width of the second slit.

Abstract: An electricity storage module includes a plurality of electricity storage cells, a plurality of resin frames, and a bus bar module. Each of the electricity storage cells includes a pair of external terminals. The bus bar module includes a plurality of bus bars and a bus bar case. The resin frame includes a retaining portion configured to retain the bus bar case. The bus bar case includes a retained portion that is configured to engage with the retaining portion, and a biasing portion that is configured to bias the bus bar toward a side of the retained portion, in a state in which the retained portion is engaged with the retaining portion.

Abstract: A laminate battery includes an electrode body, an exterior body consisting of a pair of exterior films, and an electrode terminal. The exterior body has a film welded portion in which the exterior films are welded to each other, and a terminal welded portion in which the exterior films are welded to the electrode terminal. The electrode terminal is covered with a thermally weldable film, and the thermally weldable film has a protruding portion that protrudes from a side face of the electrode terminal outward in a depth direction. The length of the protruding portion is equal to or larger than 50% of the thickness of the terminal welded portion, and is smaller than 100% of the length of the film welded portion.