Abstract: Provided is a technique suppressing an electrode assembly inside an outer case from moving in a vertical direction with a simple configuration. An electric storage device includes the electrode assembly, the outer case, a sealing plate, a current collector, and an insulating member. The electrode assembly includes a tab. The outer case includes a bottom surface and an opening opposed to the bottom surface, and is a member accommodating the electrode assembly inside. The sealing plate covers the opening. The current collector is attached to the sealing plate, and is electrically connected to the electrode assembly via the tab. The insulating member is arranged between the sealing plate and the current collector. In addition, the insulating member includes an extension part configured to extend toward the electrode assembly so as to press the electrode assembly onto the bottom surface.

Abstract: Provided is a technique decreasing a risk of damaging inside of an electrode assembly by an electrolytic solution injection. The electric storage device includes an electrode assembly, an electrolytic solution, an outer case, a sealing plate, and a current collector. The electrode assembly includes an electrode tab. The outer case includes an opening. The sealing plate is provided with a liquid injection hole. The current collector is attached to the sealing plate, and is electrically connected to the electrode assembly via the electrode tab. On the sealing plate, the liquid injection hole is provided not to overlap with a portion to which the current collector is attached. Between the liquid injection hole and the electrode assembly, a shielding part is provided to inhibit the electrolytic solution injected through the liquid injection hole from directly coming into contact with the electrode assembly.

Abstract: A battery cell includes: a resin insulator having a first portion, a second portion, and a third portion, the first portion being a portion that insulates a terminal portion and a sealing plate from each other outside an exterior container, the second portion being a portion that insulates a current collector and the sealing plate from each other inside the exterior container, the third portion being a portion that has a tubular shape and that communicates with an electrolyte solution injection hole, wherein the third portion of the resin insulator includes a shielding portion that shields between at least a portion of the electrolyte solution injection hole and an electrode assembly, and the first portion, the second portion and the third portion of the resin insulator are molded to be integrated together.

Abstract: A battery includes: an electrode assembly and an electrolyte solution; an exterior container that is provided with an injection hole; and a sealing member that is fixed to the exterior container by swaging. The sealing member includes: a first member having a stem portion; and a second member having an engagement portion engaged with the stem portion. The stem portion has an abutment surface with which the engagement portion is in abutment, and a swaging-fixation portion formed to be located between an inner surface of the exterior container and the engagement portion so as to fix the sealing member to the exterior container. A relation of 0.55?B/A is satisfied between a thickness (A) of a portion of the exterior container in which the injection hole is formed and a distance (B) between the abutment surface of the stem portion and the inner surface of the exterior container.