LOWER PLASTIC STRUCTURE, END COVER ASSEMBLY, ENERGY STORAGE DEVICE AND ELECTRICAL EQUIPMENT

The present disclosure provides a lower plastic structure, an end cover assembly, an energy storage device and electrical equipment. The lower plastic structure includes a lower plastic part (11) and a flow guide (12). The lower plastic part (11) has a first surface (lla) and a second surface (11b) facing away from the first surface (lla). The lower plastic part (11) is provided with a first liquid injection hole (111). The flow guide (12) includes a connection component (121) and an elastic flow guide component (122). A projection of the elastic flow guide component (122) on the first surface (lla) at least covers part of the first liquid injection hole (111). The elastic flow guide component (122) has a third surface (122a) facing toward the first surface (lla) and a fourth surface (122b) facing away from the third surface (122a).