| 摘要 |
Disclosed is a secondary battery of a differential lead structure including an electrode assembly including a cathode plate having a cathode tab, an anode plate having an anode tab, and a separator interposed between the cathode plate and the anode plate, a battery casing to receive the electrode assembly, a cathode lead electrically connected to the cathode tab, and an anode lead electrically connected to the anode tab and made of a different material from the cathode lead, wherein the cathode lead and the anode lead have a differential cross sectional area such that the lead having lower electrical conductivity has a larger cross sectional area than the other lead having higher electrical conductivity.
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