A battery center pin and cylindrical battery

The utility model discloses a battery center needle and a cylindrical battery, the battery center needle comprises a needle body, and densely distributed grooves are formed in the surface of the needle body. The battery center needle can improve the infiltration capacity of electrolyte on a battery roll core, reduce the internal resistance of the battery, improve the cycle performance of the battery and prolong the service life of the battery. 本申请公开了一种电池中心针和圆柱形电池，所述电池中心针包括针体，所述针体的表面制有密布的沟槽。本申请这种电池中心针能够提升电解液对电池卷芯的浸润能力，降低电池内阻，同时提升电池的循环性能，延长电池的使用寿命。