Patent ID: 7842413

Claim:
A rechargeable battery comprising: a plurality of battery jars including two adjacent battery jars; a partition wall arranged between the two adjacent battery jars, the partition wall including a plurality of connection holes; and a plurality of power generation elements respectively accommodated in the plurality of battery jars, each of the plurality of power generation elements including an electrode plate assembly, which has at least one cathode plate and at least one anode plate that are stacked together, and two collector plates connected to opposite sides of the electrode plate assembly, wherein the electrode plate assembly includes two ends forming two leads connected to the two collector plates; the two collector plates each including a plurality of connection projections integrally formed in each collector plate, wherein the two leads each include at least one cut-out portion formed in at least one position corresponding to at least one of the plurality of connection projections; and one of the two adjacent battery jars having its plurality of connection projections, which are arranged on one of the two collector plates located on a side of the power generation element adjacent to the other one of the two adjacent battery jars, welded and connected through the plurality of connection holes of the partition wall to the plurality of connection projections, which are arranged on the collector plate located on a side of the power generation element adjacent to the one of the two adjacent battery jars in the other one of the two adjacent battery jars.