SECONDARY ELECTRIC CELL WITH ENHANCED CONTACT RESISTANCE

摘要

PURPOSE: A secondary battery is provided to improve the performance degradation due to heating and prevent resistance increase by aluminum metal oxidation contacting with air and to improve degradation phenomenon due to heating. CONSTITUTION: A secondary battery(100) comprises: an electrode assembly(101) which has a positive electrode plate with a positive electrode tab(110), a negative electrode plate with a negative electrode tab(120), and a separator alternately laminated; a battery case(150) accepting the electrode assembly; a negative electrode lead(130) which is electrically connected to the negative electrode tab; and a battery case which accepts and seals the electrode assembly. The negative electrode lead and the positive electrode tab are exposed to the outside of the battery case. The exposed part of the positive electrode tab is plated with a metal which has a higher conductivity than the positive electrode tab.