Rechargeable battery and battery module

摘要

A rechargeable battery including an electrode assembly; a case housing the electrode assembly; a first terminal post electrically coupled to an electrode of the electrode assembly; and a first terminal plate including a first plate coupled to the first terminal post and a second plate coupled to the first plate, wherein the first plate and the second plate are made from different materials.

主权项

1. A battery module comprising:
a plurality of rechargeable batteries each of the rechargeable batteries comprising:
an electrode assembly;a case and a cap plate accommodating the electrode assembly;a first terminal post electrically coupled to an electrode of the electrode assembly and consisting of a first metal composition;a first terminal plate comprising a first plate coupled to the first terminal post and consisting of the first metal composition and a second plate and a third plate both coupled to the first plate, spaced from the first terminal post, and consisting of a second metal composition different from the first metal composition, wherein the first terminal post extends within an opening in the first plate in a direction away from the case;a second terminal post electrically connected to another electrode of the electrode assembly and protruding from the case, and a second terminal plate welded to the second terminal post, wherein the second terminal post, the second terminal plate and the second plate comprise the same material; andan insulating gasket between the cap plate and the first terminal plate, wherein the insulating gasket directly contacts the first plate and the second plate; and a connection member electrically coupling adjacent ones of the rechargeable batteries together, wherein the connection member is welded to the second plate and the third plate of a first one of the batteries and to the second terminal plate of a second one of the batteries and wherein the connection member consists of the second metal composition.