Electrode assembly and rechargeable battery having the same

Abstract

An electrode assembly and a secondary battery having the same are disclosed. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator. The positive electrode plate includes a positive electrode active material and a positive electrode tab. The negative electrode plate includes a negative electrode active material and a negative electrode tab. The separator is disposed between the positive electrode plate and the negative electrode plate. A negative electrode non-coating portion is disposed on the negative electrode plate corresponding to a position of the positive electrode tab. A positive electrode non-coating portion is disposed on the positive electrode plate corresponding to a position of the negative electrode tab.

What is claimed is: 
     
         1 . An electrode assembly comprising:
 a positive electrode plate comprising a positive electrode active material and a positive electrode tab;   a negative electrode plate comprising a negative electrode active material and a negative electrode tab; and   a separator disposed between the positive electrode plate and the negative electrode plate,   wherein a negative electrode non-coating portion is disposed on the negative electrode plate corresponding to a position of the positive electrode tab, and a positive electrode non-coating portion is disposed on the positive electrode plate corresponding to a position of the negative electrode tab.   
     
     
         2 . The electrode assembly as claimed in  claim 1 , wherein the positive electrode plate comprises a positive electrode collector plate having a first surface and a second surface,
 wherein the positive electrode tab is attached to the first surface, a positive electrode active material is coated on the first surface and the second surface except for on the positive electrode tab and on the positive non-coating portion, and the positive electrode non-coating portion is disposed on a position of the second surface overlapping the negative electrode tab.   
     
     
         3 . The electrode assembly as claimed in  claim 1 , wherein the positive electrode tab comprises an attachment section attached to the positive electrode plate, and the negative electrode non-coating portion overlaps the attachment section. 
     
     
         4 . The electrode assembly as claimed in  claim 3 , wherein the attachment section has any one of a rectangular shape, triangular shape, and a curved shape. 
     
     
         5 . The electrode assembly as claimed in  claim 1 , wherein the negative electrode plate comprises a negative electrode collector plate having a first surface and a second surface,
 wherein the negative electrode tab is attached to the first surface, a negative electrode active material is coated on the first surface and the second surface except for on the negative electrode tab and on the negative electrode non-coating portion, and the negative electrode non-coating portion is disposed on a position of the second surface overlapping the positive electrode tab.   
     
     
         6 . The electrode assembly as claimed in  claim 1 , wherein the negative electrode tab comprises an attachment section attached to the negative electrode plate, and the positive electrode non-coating portion overlaps the attachment section. 
     
     
         7 . The electrode assembly as claimed in  claim 6 , wherein the attachment section has any one of a rectangular shape, triangular shape, and a curved shape. 
     
     
         8 . An electrode assembly comprising:
 a positive electrode plate comprising a positive electrode tab formed on one side and a space formed on an opposite side of the positive electrode plate;   a negative electrode plate comprising a negative electrode tab formed on one side and a space formed on an opposite side of the negative electrode plate; and   a separator disposed between the positive electrode plate and the negative electrode plate,   wherein the space formed on the positive electrode plate overlaps the negative electrode tab and the space formed on the negative electrode plate overlaps the positive electrode tab.   
     
     
         9 . The electrode assembly of  claim 8 , wherein one surface of the positive electrode plate comprises the positive electrode tab and a coating of a positive electrode active material, and an opposite surface of the positive electrode plate comprises the space formed on the positive electrode plate and a coating of the positive electrode active material.