Method for manufacturing battery

摘要

A current collector electrically connected to a first electrode plate or a second electrode plate includes a tubular current collection section. An external terminal electrically connected to the current collector includes a tubular terminal section into which the current collection section is inserted. The current collection section has, before being inserted into the terminal section, a greater outer diameter than the inner diameter of the terminal section. In the insertion process, the diameter of the current collection section is reduced or the diameter of the terminal section is expanded so that the outer diameter of the current collection section is equal to or smaller than the inner diameter of the terminal section, and then the current collection section is inserted into the terminal section. After that, the outer peripheral surface of the current collection section and the inner peripheral surface of the terminal section are made to be in close contact with each other by the restoring force of the current collection section having the reduced diameter or of the terminal section having the expanded diameter, and as a result, the current collection section is fixed to the terminal section.

主权项

1. A method of manufacturing a battery including:
an electrode assembly having a first electrode plate, a second electrode plate, and a separator; a current collector electrically connected to the first electrode plate or the second electrode plate and including a tubular current collector portion; and an external terminal electrically connected to the current collector and including a tubular terminal portion in which the tubular current collector portion is inserted, wherein the tubular current collector portion has an outside diameter larger than an inside diameter of the tubular terminal portion before the tubular current collector portion is inserted into the tubular terminal portion, the method includes an insertion step of inserting the tubular current collector portion into the tubular terminal portion by reducing the diameter of the tubular current collector portion or increasing the diameter of the tubular terminal portion so that the outside diameter of the tubular current collector portion becomes equal to or smaller than the inside diameter of the tubular terminal portion, after which an outer circumferential surface of the tubular current collector portion and an inner circumferential surface of the tubular terminal portion are brought into tight contact with each other by a restoring force of the tubular current collector portion with the reduced diameter or the tubular terminal portion with the increased diameter so as to fasten the tubular current collector portion to the tubular terminal portion, the tubular current collector portion includes a cut-out formed by cutting off part of a wall forming the tubular current collector portion, the cut-out extending from a distal end of the tubular current collector portion along an axis line direction, and the insertion step includes inserting the tubular current collector portion into the tubular terminal portion by resiliently reducing the diameter of the tubular current collector portion so as to compress the cut-out in the tubular current collector portion, after which the outer circumferential surface of the tubular current collector portion is brought into tight contact with the inner circumferential surface of the tubular terminal portion by a resilient restoring force of the tubular current collector portion, so that the tubular current collector portion is fastened to the tubular terminal portion.