Composite pole structure and battery cell top cover structure

The utility model provides a composite pole structure and a battery cell top cover structure, the composite pole structure specifically comprises a first pole and a second pole, and the first pole comprises a base and a bulge positioned on the base; a groove is formed in one side, close to the first pole, of the second pole; the protrusions are connected with the grooves through threads. 本实用新型提供一种复合极柱结构及电芯顶盖结构，该复合极柱结构具体包括第一极柱和第二极柱，第一极柱包括底座和位于底座上的凸起；第二极柱靠近第一极柱的一侧设置有凹槽；其中，凸起与凹槽通过螺纹连接。