Patent ID: 8535822

Claim:
An electrode assembly comprising: a positive electrode plate having: a positive electrode collector, a positive electrode coated portion comprising a positive electrode active material coated on at least one surface of the positive electrode collector, and a positive electrode non-coating portion where the positive electrode active material is absent on surfaces of the positive electrode collector; a negative electrode plate having: a negative electrode collector, a negative electrode coated portion comprising a negative electrode active material coated on at least one surface of the negative electrode collector, and a negative electrode non-coating portion where the negative electrode active material is absent on surfaces of the negative electrode collector; and a separator between the positive electrode plate and the negative electrode plate; wherein the positive electrode plate and negative electrode plate and separator are wound in a jelly-roll configuration, wherein the positive electrode non-coating portion includes a short circuit preventing region such that a height of the positive electrode non-coating portion is lower than a height of the positive electrode coated portion, and wherein the negative electrode plate further comprises a negative electrode tab attached to the negative electrode non-coating portion, the separator having a portion located between the negative electrode tab and the short circuit preventing region.