| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a lithium secondary battery capable of manufacturing a low-cost and high-performance lithium secondary battery, dispensing with the requirement for low-humidity working environment that incur high facilty cost. SOLUTION: The manufacturing method of the secondary battery comprises a sealing process of sealing a battery element, made by electrically insulating a cathode and an anode with a separator inside a battery container, equipped with at least one tube having a valve for draining inside air and/or injecting electrolyte solution inside with; a moisture-removing process of draining air inside the battery container via the tube under decompressed atmosphere and heating and drying the inside of the battery container, a liquid injecting process of injecting electrolyte solution into the battery container via the tube, and a tub-sealing process of sealing the tube. In the liquid-injectiion process, after a metering pump of a liquid injection device equipped with a tank for housing the electrolyte solution, the metering pump connected to the tank and a drainage device connected to the metering pump is connected to the tube, and air between the valve of the tube and the liquid injection device is to be drained. COPYRIGHT: (C)2010,JPO&INPIT
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