US 2022/0021072 A1 · SEALED BATTERY

Abstract

A sealed battery with a battery case that includes a bottomed cylindrical outer can and an opening-sealing body that closes an opening section of the outer can; and an electrode body that is accommodated inside the battery case. The opening-sealing body includes a metal plate, and the metal plate includes a protruding section that bulges toward the outside of the battery cast, and a flange section that is formed on the circumference of the protruding section. The protruding section includes an inclination section that inclines inward from the radial outside of the opening sealing body so as to be progressively separated from the electrode body, wherein a thin wall section, which has a thickness less than portions other than the inclination section and is preferably broken when the inner pressure of the battery case exceeds a predetermined threshold, is formed in at least a portion of the inclination section.

Claims4

Dependent claims

A sealed battery, comprising:

a battery case including a bottomed tubular exterior can and a sealing assembly sealing an opening of the exterior can;
and
an electrode assembly housed in the battery case, wherein
the sealing assembly includes a metal plate,
the metal plate includes
a projection expanding toward the outside of the battery case, and
a flange part formed around the projection,
the projection includes an inclined part inclined so as to be gradually apart from the electrode assembly as going toward an inside from an outside of the sealing assembly in a radial direction, and
a thin part that has a smaller thickness than a portion except the inclined part and takes priority in fracturing when an internal pressure of the battery case exceeds a predetermined threshold is formed in at least part of the inclined part.

6 more elements

Dependencies are inferred from the claim text.

Sealed battery

Life of this patent

Sealed battery

Life of this patent

Abstract

Claims4