JP2006128010A5 - - Google Patents

Claims (9)

In the state where the relief electrode (2) of the sealing plate (1) is provided with the exhaust opening (4) of the safety valve (3), the internal pressure of the outer can (5) rises and the safety valve (3) opens. A sealed battery configured to discharge the contents in the battery from the exhaust opening (4),
An exhaust opening (4) is provided on the peripheral wall of the convex electrode (2), and the convex electrode (2) is formed by molding a rubber-like elastic body into a ring shape, and the inner peripheral surface (6A) is formed on the convex electrode ( 2) Insert into the elastic ring (6) that is elastically pressed against the surface of (2) and directly close the exhaust opening (4) with the elastic ring (6), or project the elastic ring (6) The exhaust opening (4) is substantially closed in close contact with the peripheral wall of the partial electrode (2) and the end face of the battery,
The elastic ring (6) closes the exhaust opening (4) when the safety valve (3) is closed, and exhausts the contents discharged from the safety valve (3) when the safety valve (3) is open. A sealed battery configured to be discharged from the opening (4).   The sealed battery according to claim 1, wherein the elastic ring (6) is fixed by adhering to the end face of the battery.   Cover the outer can (5) with a heat-shrinkable tube (7), place an elastic ring (6) inside the heat-shrinkable tube (7), and fix it to the end face of the battery with the heat-shrinkable tube (7). The sealed battery according to claim 1.   The lead plate (8) is connected to the convex electrode (2), the upper surface of the elastic ring (6) is pressed by the lead plate (8), and the elastic ring (6) is fixed to the end face of the battery. Item 2. A sealed battery according to item 1.   The sealed battery according to claim 1, wherein the exhaust opening (4) is opened below the convex electrode (2).   The sealed battery according to claim 1, wherein the sealed battery is a lithium ion secondary battery.   The sealed battery according to claim 1, wherein the elastic ring (6) is one of synthetic rubber, natural rubber, soft synthetic resin, and synthetic resin foam having closed cells.   The sealed battery according to claim 1, wherein the elastic ring (6) has water repellency or is subjected to water repellency treatment. In the state where the relief electrode (2) of the sealing plate (1) is provided with the exhaust opening (4) of the safety valve (3), the internal pressure of the outer can (5) rises and the safety valve (3) opens. A sealed battery configured to discharge the contents in the battery from the exhaust opening (4),
The ring-shaped member is brought into close contact with the surface of the convex electrode (2) and the end face of the battery in a state where the surface on the tip side of the convex electrode (2) appears from the opening of the ring-shaped member. The exhaust opening (4) is closed
This ring-shaped member closes the exhaust opening (4) when the safety valve (3) is closed, and discharges the contents discharged from the safety valve (3) when the safety valve (3) is open. (4) A sealed battery configured to be discharged to the outside.