Battery connecting piece and battery thereof

The utility model relates to the technical field of batteries, in particular to a battery connecting piece and a battery thereof, the battery connecting piece comprises a connecting piece body, and the side, close to a tab, of the connecting piece body is bent upwards. The optimization of the chamfer, the protective layer and the bending of the tab can avoid the damage of the metal connecting piece to the tab, avoid the failure of the pole piece, greatly improve the yield in the welding process of the cover and the roll core, and improve the benefits of enterprises. 本实用新型涉及电池技术领域，特别是一种电池连接片及其电池，所述电池连接片包括连接片本体，所述连接片本体的近极耳侧向上折弯。本专利的倒角以及保护层、极耳的弯折的优化可以实现避免了金属连接片对于极耳的破坏，避免极片的失效，盖子和卷芯焊接过程中良品率的大大提高，提升了企业的效益。