Force storage window breaking device, automobile door assembly and automobile

The utility model provides a power storage window breaking device, a car door assembly and a car and relates to the technical field of car parts, the power storage window breaking device comprises a mounting base, a top block, an elastic piece and a locking mechanism, the interior of the mounting base is hollow, the top block and the elastic piece are both arranged in the mounting base, a firing pin is arranged at one end of the top block, an opening is formed in the mounting base, and the elastic piece is arranged in the opening. The ejector block is used for penetrating through the opening under the action of the elastic piece so that the firing pin can abut against the vehicle window glass, and the locking mechanism is used for enabling the ejector block and the mounting base to be relatively locked or unlocked. According to the force storage window breaking device, when a vehicle falls into water and needs to be broken, the locking mechanism is unlocked, the elastic piece drives the ejector block to penet