PRESSURE RELIEF MECHANISM, BATTERY CELL, BATTERY, ELECTRICAL DEVICE AND MANUFACTURING METHOD THEREFOR

Embodiments of this application provide a pressure relief mechanism , a battery cell , a battery, an electric apparatus, and a manufacturing method thereof. A pressure relief mechanism is provided on a housing plate of a battery cell and includes: a connecting portion , where the connecting portion is located at an outer peripheral region of the pressure relief mechanism and is configured to connect the housing plate ; a first part, where an end of the first part is connected to the connecting portion, and another end protrudes obliquely toward an interior of the battery cell ; a weak portion , where the weak portion is provided at the protruding end of the first part ; and a second part ), where an outer edge region of the second part is connected to the weak portion , and the outer edge region extends obliquely away from the interior of the battery cell , where when an air pressure inside the battery cell is less than a first preset value, the weak portion is pressed by the first part ) and/or the second part . Service life of the pressure relief mechanism can be effectively extended by using a technical solution in the embodiments of this application.