METHOD FOR MANUFACTURING SEALED BATTERY

摘要

Disclosed is a method for manufacturing a sealed battery capable of reducing leakage of helium gas introduced into an exterior. A method for manufacturing a sealed battery according to the present invention includes a leak testing step for detecting leak of helium gas (H) introduced into an exterior (30), a processing step for increasing apparent specific gravity of the helium gas (H) by mixing the helium gas (H) and the hydrocarbon gas with specific gravity larger than that of the helium gas (H) to prepare mixed gas (G), an introducing step for introducing the helium gas (H) into the exterior (30) with the apparent specific gravity of the helium gas (H) increased by introducing the mixed gas (G), and a sealing step for sealing the exterior (30) into which the helium gas (H) is introduced.

主权项

1. A method for manufacturing a sealed battery having a battery case, comprising:
a leak testing step for detecting leak of detection gas introduced into the battery case; a processing step for increasing apparent specific gravity of the detection gas; an introducing step for introducing the detection gas into the battery case after increasing the apparent specific gravity of the detection gas; and a sealing step for sealing the battery case into which the detection gas is introduced.