POWER STORAGE APPARATUS AND VEHICLE WITH POWER STORAGE APPARATUS MOUNTED THEREON

摘要

A power storage device includes an electrode assembly formed by stacking a positive electrode sheet, a negative electrode sheet, and a sheet-like separator arranged between the positive and negative electrode sheets. The positive electrode sheet includes a positive electrode thin metal plate, which includes a first positive electrode edge and a second positive electrode edge. A surface of the positive electrode sheet includes a positive electrode application region and a positive electrode non-application region. The negative electrode sheet includes a negative electrode thin metal plate including a first negative electrode edge and a second negative electrode edge. A positive electrode border, which is a border between the positive electrode application region and the positive electrode non-application region, is located between the first positive electrode edge and the second positive electrode edge. The positive electrode border is located between the first negative electrode edge and the second negative electrode edge.

主权项

1. A power storage device comprising:
a positive electrode sheet including a positive electrode thin metal plate, which includes a first positive electrode edge and a second positive electrode edge located at an opposite side of the first positive electrode edge, and a positive electrode tab, which extends from the first positive electrode edge; a positive current collection member connected to the positive electrode tab to be electrically connected to the positive electrode thin metal plate; a negative electrode sheet including a negative electrode thin metal plate, which includes a first negative electrode edge and a second negative electrode edge located at an opposite side of the first negative electrode edge, and a negative electrode tab, which extends from the first negative electrode edge; a negative current collection member connected to the negative electrode tab to be electrically connected to the negative electrode thin metal plate; a sheet-like separator arranged between the positive electrode sheet and the negative electrode sheet to insulate the positive electrode sheet and the negative electrode sheet from each other; an electrode assembly formed by stacking the positive electrode sheet, the negative electrode sheet, and the separator; and a case accommodating the electrode assembly, wherein a surface of the positive electrode sheet includes a positive electrode application region, which includes the second positive electrode edge and to which a positive active material is applied, the surface of the positive electrode sheet includes a positive electrode non-application region, to which the positive active material is not applied, a positive electrode border, which is a border between the positive electrode application region and the positive electrode non-application region, is located between the first positive electrode edge and the second positive electrode edge, a surface of the negative electrode sheet includes a negative electrode application region, which includes the second negative electrode edge and to which a negative active material is applied, the surface of the negative electrode sheet includes a negative electrode non-application region, to which the negative active material is not applied, a negative electrode border, which is a border between the negative electrode application region and the negative electrode non-application region, is located between the first negative electrode edge and a distal portion of the negative electrode tab, the first negative electrode edge and the first positive electrode edge are located on the same side of the electrode assembly, and a length from the first negative electrode edge to the second negative electrode edge is greater than a length from the first positive electrode edge to the second positive electrode edge, the positive electrode border is located between the first negative electrode edge and the second negative electrode edge.