Heat dissipation type power battery top cover and secondary battery

The utility model provides a heat dissipation type power battery top cover. The heat dissipation type power battery top cover comprises a top cover sheet, a positive pole column assembly, a negative pole column assembly, a riveting block, an explosion-proof valve structure, a turnover valve structure and a liquid injection hole, the riveting structure is characterized in that a heat dissipation structure is arranged at the top of the riveting block, and the heat dissipation structure is of a plurality of groove structures which are sequentially arranged by taking the pole column as the center.The utility model provides a power battery top cover. A heat dissipation structure is arranged on a riveting block; when the battery cell is charged, a certain gap exists between the battery cell andthe Busbar, so that heat generated by the battery cell cannot be directly conducted to the Busbar through the metal shell, and meanwhile, heat generated by a welding seam can be dissipated to the periphery along the heat diss