Battery cell comprising liquid injection hole, battery, and electric device

A battery cell, comprising:

• a housing, defining an accommodating cavity;
• a post terminal body, disposed on the housing, and the post terminal body being provided with a communication channel in communication with the accommodating cavity;
• and
• a post terminal cover plate, wherein the post terminal body is lidded with the post terminal cover plate, and the post terminal cover plate is provided with a liquid injection hole in communication with the communication channel,
• wherein the communication channel comprises a first accommodating groove and a liquid transfer hole, the first accommodating groove opening toward a direction of the post terminal cover plate to be in communication with the liquid injection hole, and the liquid transfer hole penetrating through a groove wall of the first accommodating groove and communicating the first accommodating groove with the accommodating cavity,
• wherein the battery cell comprises a battery cell assembly, the battery cell assembly comprising an active substance-coated part received in the accommodating cavity and at least one conductive part connected to the active substance-coated part;
• the post terminal body is provided with one or more communication holes, the one or more communications holes comprises at least one first communication hole and at least one second communication hole, the at least one second communication hole is separate and spaced apart from the at least one first communication hole in a length direction of the post terminal body, the at least one first communication hole and the at least one second communication hole respectively communicate the first accommodating groove with the accommodating cavity and configured to serve as the liquid transfer hole, and the at least one conductive part is disposed through the at least one first communication hole in a penetrating manner to be at least partially received in the first accommodating groove, the at least one conductive part is not disposed through the at least one second communication hole in a penetrating manner,
• wherein the post terminal cover plate is an elongated cover plate, the post terminal body is formed as an elongated strip structure, and the at least one first communication hole is formed as an elongated strip hole extending in a length direction from one of two ends of a length of the post terminal body to the other one of the two ends of the length of the post terminal body, the at least one first communication hole is eccentrically disposed in a length direction of the post terminal cover plate, the at least one second communication hole is disposed proximal to at least one end of the two ends of length of the first communication hole.