Device for opening a pressurised gas container, cold gas generator and method for producing a cold gas generator

The device (104) has a rupture disk (108) for gas-tight sealing of the gas pressure container (102), and an explosive charge (110) for destroying the rupture disk in response to an ignition impulse. The explosive charge is arranged in direct contact with a surface of the rupture disk. The explosive charge is arranged at a weak point of the rupture disk. The rupture disk has a groove, which is designed as a predetermined breaking point of the rupture disk. Independent claims are included for the following: (1) a cold gas generator with a valve; and (2) a method for manufacturing a cold gas generator.