LITHIUM SECONDARY BATTERY HAVING IMPROVED ELECTROLYTE WETTING PROPERTY AND METHOD FOR PREPARATION OF THE SAME

摘要

PURPOSE: A secondary battery with improved wettability is provided to able to absolutely remove inner gas, and to improve performance, and lifetime of a secondary battery by increasing electrolyte impregnation of an electrode assembly. CONSTITUTION: A secondary battery comprises a first flow channel(20) for electrolyte injection, and a second flow channel(21) for vacuum process in order to make the inside of a battery to vacuum state. The first flow channel is formed on one side of a pouch type exterior. The second flow channel is formed at location separated from the first flow channel. The first and the second flow channels are formed on the pouch type exterior of a part corresponding with an upper or a lower direction of an electrode assembly(10). The first flow channel and the second flow channel are formed along the opposite directions each other on the pouch type exterior.