The invention discloses a battery manufacturing process, a film tearing method and a film tearing device. The film tearing method comprises the following steps that heating is carried out on a protective film with an initial
adhesive force of 0.2-0.5 N / 25mm; a blowing device blows air to the starting edge of the protective film to blow up the protective film, and a first clamping device clamps the blown-up protective film; the first clamping device moves to separate the protective film from a first surface of a
battery cell; a second clamping device clamps the protective film, and the first clamping device loosens the protective film; and the mechanical arm controls the
battery cell to move upwards by a certain distance, the second clamping device moves to separate the protective film from a second surface of the
battery cell, and then the protective film is conveyed to a waste box. According to the method, the initial
adhesive force of the protective film is set in a specific range, so that the protective film does not fall off in the circulation process, the battery
cell is protected from being damaged, and meanwhile, heating is carried out on the protective film before the film is torn, so that the
viscosity of the protective film is reduced, the protective film is easier to tear off, and the film tearing rate is improved, and therefore the balance of initial
viscosity and film tearing degumming is realized.