Patent ID: 9520589
Filing Date: 2016-12-13
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A secondary battery of an improved lead structure comprising: an electrode assembly including a plurality of cathode plates, a plurality of anode plates, a plurality of electrode tabs including a plurality of cathode tabs formed on the cathode plates, and a plurality of anode tabs formed on the anode plates, and a separator disposed between neighboring cathode plates and anode plates; a battery casing for receiving the electrode assembly; and a plurality of electrode leads comprising one or more cathode leads electrically coupled to ones of the plurality of cathode tabs and one or more anode leads electrically coupled to ones of the anode tabs, each of the electrode leads having a length, a width and a thickness; wherein each of the cathode plates includes multiple cathode tabs extending longitudinally from the cathode plate in a first direction and disposed at different lateral positions along a width of the cathode plate, the multiple cathode tabs being electrically connected to one or more of the cathode leads at a plurality of laterally spaced apart first joints disposed along a width of the one or more cathode leads, the number of first joints being greater than the number of the one or more cathode leads; wherein each of the anode plates includes multiple anode tabs extending longitudinally from the anode plate in a second direction, the second direction being opposite of the first direction, and disposed at different lateral positions along a width of the anode plate, the multiple anode tabs being electrically connected to one or more of the anode leads at a plurality of laterally spaced apart second joints disposed along a width of the one or more anode leads, the number of second joints being greater than the number of the one or more anode leads; wherein the electrode tabs include first tabs electrically coupled to upper surfaces of the electrode leads, and second tabs electrically coupled to lower surfaces of the electrode leads, and wherein the first tabs and the second tabs are laterally aligned along widths of the electrode leads such that the first tabs and the second tabs overlap with one another; and wherein the anode tabs have a same first length and the cathode tabs have a same second length.