Patent ID: 9653722
Date: 2017-05-16
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A prismatic secondary battery, comprising: an electrode assembly including a positive electrode plate and a negative electrode plate; an outer casing having a mouth and housing the electrode assembly; a sealing body having a through-hole and sealing the mouth of the outer casing; a terminal member electrically connected to the positive electrode plate or the negative electrode plate and penetrating the through-hole of the sealing body; an external conduction member having a through-hole and connected to the terminal member; and an insulating member interposed between the terminal member and the sealing body, wherein the terminal member includes a flange, a first connecting part formed on a first surface side of the flange, and a second connecting part formed on a second surface side of the flange, the flange and the second connecting part are disposed on a battery exterior side than the sealing body, the first connecting part penetrates the through-hole of the sealing body, the second connecting part is inserted into the through-hole of the external conduction member, and includes a tip part swaged on the external conduction member, an abutting part of a tip of the swaged part of the second connecting part and the external conduction member is weld-connected, a first protruding part is provided around the through-hole on a surface of the external conduction member opposite to the sealing body side, an outer end of the swaged part of the second connecting part in a diameter expansion direction contacts with the first protruding part, an abutting part of the outer end of the swaged part of the second connecting part in a diameter expansion direction and the first protruding part is weld-connected, wherein a second protruding part is provided in the vicinity of the through-hole on a surface of the external conduction member opposite to the sealing body side, and the swaged part of the second connecting part covers the second protruding part, wherein a through-hole side end part of the external conduction member of the second protruding part has an inclined surface, an upper end of the through-hole of the external conduction member has an inclined surface, the inclined surface of the second protruding part and the inclined surface of the upper end of the through-hole of the external conduction member are continuously formed.