SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF

摘要

The present disclosure discloses a secondary battery and a manufacturing method thereof. According to the present disclosure, the influence of heat generated at a welding spot between an electrode tab and an electrode lead on the performance of a secondary battery may be minimized. Accordingly, in the design of a large capacity secondary battery, the battery performance may be close to an ideal condition.

主权项

1. A secondary battery comprising:
a cell assembly having a stack of at least two unit cells, each unit cell including a cathode plate, a separator, and an anode plate; a cathode tab and an anode tab (hereinafter referred to as an electrode tab′) provided protrusively from the cathode plate and the anode plate for each unit cell; a cathode lead and an anode lead (hereinafter referred to as an electrode lead′) electrically connected to a plurality of cathode tabs and a plurality of anode tabs; a welding part which mechanically connects the electrode tab to the electrode lead; and a case which seals the cell assembly such that a part of the electrode lead is exposed to outside, wherein the welding part is formed near the cell assembly.