Patent ID: 11923558
Assignee: SANYO ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 6:
7. A rectangular secondary battery comprising:
an electrode body that includes a positive electrode plate and a negative electrode plate;
a rectangular casing that has an opening and contains the electrode body;
a sealing plate that seals the opening;
a tab that is provided on the positive electrode plate or the negative electrode plate;
a tab group that is composed of a plurality of the tabs;
a terminal that is electrically connected to the tab group and attached to the sealing plate;
a current collector member that is electrically connected to the tab group and the terminal;
an insulator that is disposed between the sealing plate and the current collector member;
a first insulator that is disposed on the electrode body side of the sealing plate;
a conductor that has an opening on the electrode body side and that is disposed on the electrode body side of the first insulator;
a deformable plate that seals the opening of the conductor; and
a second insulator that is disposed between the deformable plate and the current collector member,
wherein the sealing plate has a gas discharge valve,
wherein the sealing plate has a first recess at a position facing the insulator,
wherein the insulator has a first protrusion at a position facing the sealing plate,
wherein the first protrusion is disposed in the first recess,
wherein, in a transversal direction of the sealing plate, the first recess is displaced from a center of the sealing plate toward an end portion of the sealing plate,
wherein the second insulator includes an insulator first region that is disposed so as to face the deformable plate and an insulator second region that is located nearer than the insulator first region to the center of the sealing plate in a longitudinal direction of the sealing plate and that is disposed on the sealing plate,
wherein the insulator is the second insulator, and
wherein the first protrusion is disposed on the insulator second region.