Power Storage Cell

A power storage cell comprising:

• a cell case;
• a wound electrode assembly;
• and
• an electrolyte solution, wherein
• the cell case houses the wound electrode assembly and the electrolyte solution,
• the wound electrode assembly is impregnated with the electrolyte solution,
• the cell case includes a top wall, a peripheral wall, and a bottom wall,
• the top wall faces the bottom wall,
• the peripheral wall connects the top wall and the bottom wall,
• the wound electrode assembly includes a positive electrode sheet, a separator sheet, and a negative electrode sheet,
• a winding axis direction of the wound electrode assembly is along a direction from the bottom wall toward the top wall, and
• in the winding axis direction,
• the wound electrode assembly has a first end portion and a second end portion,
• the first end portion faces the top wall,
• the second end portion is located opposite to the first end portion,
• at both the first end portion and the second end portion, the separator sheet extends outward with respect to the negative electrode sheet,
• at the first end portion, the separator sheet has a first protruding length,
• at the second end portion, the separator sheet has a second protruding length,
• each of the first protruding length and the second protruding length is a length of the separator sheet protruding from the negative electrode sheet in the winding axis direction, and
• the first protruding length is longer than the second protruding length.