Patent ID: 11923566
Assignee: PANASONIC HOLDINGS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A sealed battery comprising:
a case including an opening portion;
an electrode body housed in the case;
a lid member that seals the opening portion of the case;
an external terminal provided on an outer surface of the lid member;
a collector member in which a first end thereof is electrically connected to an electrode tab extended out from the electrode body and in which a second end thereof is electrically connected to a current breaking mechanism provided inside the battery; and
a conductor member provided so as to penetrate through the lid member in an airtight state such that an inside space between the conductor member and the current breaking mechanism is hermetically separated from an outside of the battery, in which, inside the battery, the conductor member is electrically connected to the current breaking mechanism, and outside the battery, the conductor member is electrically connected to the external terminal, wherein
the current breaking mechanism includes a thin plate-like conductive plate in which an outer peripheral portion thereof is directly connected to the collector member and in which an inner peripheral portion thereof, radially inward from the outer peripheral portion, is directly connected to the conductor member,
the inner peripheral portion of the conductive plate is formed in a shape protruding from a surface of the collector member,
the conductive plate is configured such that, upon an increase in pressure inside the battery, the inner peripheral portion becomes displaced in a direction toward the electrode body under increased pressure in the inside space between the conductor member and the current breaking mechanism, so as to become separated from the conductor member distinct from the collector member, thereby interrupting current flow between the collector member and the conductor member, while the outer peripheral portion maintains contact with the collector member, and
an accommodating recess configured to receive the inner peripheral portion of the conductive plate separated and displaced from the conductor member upon said increase in pressure inside the battery is formed in the collector member and in a thickness direction of the collector member.