| 摘要 |
A battery sealing structure is provided, which can provide an excellent seal for a battery. The sealing structure has an explosion-proof function and contributes to improved battery assembling operation efficiency. A three-part stack, including a cap member (3), a PTC element (4) and a safety valve (5), is inserted in a gasket (8). The safety valve has the same outer diameter as the cap member (3) and has a breakable portions capable of being broken in the event of an increase of pressure in the battery. The gasket (8), made of a soft synthetic resin, is inserted in a battery housing (2). The stack is set on an upper surface of a stepped portion (8a) of the gasket such that its outer edge is in close contact with the inner periphery of the gasket. A peripheral wall portion of the battery housing (2) adjacent the opening thereof is bent together with the gasket toward the center of the battery and onto an edge portion of the upper surface of the cap member (3) and is then pressed against the same while pushing a portion of the peripheral wall (2b) of the battery housing where the edges of the cap member (3) and the safety valve (5) are located.
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