Pole piece structure, battery cell and lithium battery

The utility model belongs to the technical field of pole pieces, and particularly relates to a pole piece structure, a battery cell and a lithium battery. The pole piece structure comprises a pole piece body, at least one side end face of the pole piece body in the width direction is provided with at least two bulges and recesses which are arranged in a staggered manner, and the two adjacent bulges form the corresponding recesses; a flow guide part is arranged in the recess and is used for guiding electrolyte to enter the recess; and the width of the recess close to the pole piece body is smaller than the width of the recess far away from the pole piece body. According to the utility model, the use safety can be improved, and the energy density of the pole piece body in a battery cell can be improved. 本实用新型属于极片技术领域，具体涉及一种极片结构、电芯及锂电池；其中，所述极片结构包括极片本体；所述极片本体的宽度方向上至少一侧端面设有至少两个相互交错设置的凸起和凹陷，并且相邻两个所述凸起形成相对应的所述凹陷；所述凹陷内设有导流部件，所述导流部件用于导引电解液进入所述凹陷；并且所述凹陷中靠近所述极片本体的宽度小于所述凹陷中远离所述极片本体的宽度。本实用新型能够提高使用的安全性，有利于提高极片本体在电芯中的能量密度。