BOTTOM PLASTIC AND BATTERY HAVING SAME

Provided are a plastic component and a battery having the same. The plastic component includes a body having a first side surface (1) and a second side surface (2) facing away from the first side surface (1). The first side surface (1) has a buffer recess (11) recessed towards the second side surface (2). The buffer recess (11) has at least one flow guide hole (12) penetrating the body in a thickness direction of the body. The second side surface (2) has a connection piece recess (21) recessed towards the first side surface (1), and the connection piece recess (21) has a pole through hole (4) penetrating the body in the thickness direction of the body.