Patent ID: 7585589
Filing Date: 2009-09-08
Classification: H01M,Y02E,Y02P

Abstract:
1. A pouch-type lithium secondary battery including a battery unit having a positive electrode, a separator, and a negative electrode being wound together, the pouch-type lithium secondary battery comprising; a pair of electrode tabs drawn from the positive and negative electrodes, respectively; a case, having a space to receive the battery unit, including upper and lower sealing surfaces of respective upper and lower portions which are thermally fused to each other and which allow first parts of the electrode tabs to extend to an exterior of the case; a short-circuit prevention tape formed on an exterior of the case, the first parts of the electrode tabs being folded and having sufficient lengths so as to contact with the short-circuit prevention tape; and a polymer material coated on at least a portion of second parts of each electrode tab which are inside of the case to seal the fusion of the upper and lower sealing surfaces around the second parts of the electrode tabs.