Patent ID: 9484603
Filing Date: 2016-11-01
CPC Classification: H01M,Y02E,Y02P,Y02T,Y10T

Claim Text:
1. A method of manufacturing a sealed lithium secondary battery having an electrode assembly, an electrolyte solution and a sealable hard case, comprising: housing the electrode assembly, which includes a positive electrode and a negative electrode, and the electrolyte solution within the hard case; negatively pressurizing the interior of the hard case and sealing the hard case in the negatively pressurized state; carrying out, after the sealing step, initial charging so as to adjust the battery to a voltage at which the electrode assembly generates gases; and carrying out, after the initial charging step, main charging so as to charge the battery to a predetermined voltage, the hard case being maintained in a sealed state from the interval following the sealing step and UP until the main charging step so that the interior of the hard case is not open to the atmosphere.