| 摘要 |
An electrode assembly which prevents materials from being damaged and improves safety by joining a plate and an electrode tab created by a high-frequency induction heating method. Also included is a secondary battery using the electrode assembly. The electrode assembly is formed by stacking and winding a positive electrode plate to which a positive electrode tab is joined, a negative electrode plate to which a negative electrode tab is joined, and a separator, and is characterized in that a bonded side is formed by surface-welding the entire welded part of either the positive electrode tab and the positive electrode plate or the negative electrode tab and the negative electrode plate, or both of the positive electrode tab and the positive electrode plate and the negative electrode tab and the negative electrode plate forming a bonded side.
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