METHOD AND DEVICE FOR MANUFACTURING SAFETY VENT OF CAP PLATE FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING CAP PLATE USING METHOD FOR MANUFACTURING SAFETY VENT, AND CAP PLATE FOR SECONDARY BATTERY MANUFACTURED BY METHOD FOR MANUFACTURING CAP PLATE

摘要

The present invention provides a method and a device for manufacturing a safety vent of a cap plate for a secondary battery, a method for manufacturing a cap plate using the method for manufacturing a safety vent, and a cap plate for a secondary battery manufactured by the method for manufacturing a cap plate, which can prevent a molding defect in a safety vent of the strength of a vent plate becoming excessively great, by easily molding the safety vent with only one or two times of forging processing in order to prevent a phenomenon in which hardening by forging occurs, during forging, in the vent plate formed at the lower part of the safety vent.