Spray shielding method and spray shielding device

The invention provides a spraying shielding method and a spraying shielding device.The spraying shielding method is used for shielding an opening and a blank area of a battery shell, the blank area is formed on the peripheral face, close to one end of the opening, of the battery shell, and the spraying shielding method comprises the steps that the opening is covered with a first covering part; and surrounding one end, close to the opening, of the battery shell with a second covering part, so that the second covering part covers the blank area. According to the technical scheme, the first covering part covers the opening of the battery shell so that the interior of the battery shell can be shielded, and the second covering part surrounds the end, close to the opening, of the battery shell so that the blank space of the battery shell can be shielded. The interior and the blank area of the battery shell are shielded through the first covering part and the second covering part, so that the non-spraying area of the battery shell is effectively prevented from being polluted, the reserved size precision of the blank area of the battery shell is effectively guaranteed, and the production quality of the battery is improved by effectively improving the production quality of the battery shell.