Power battery cover and power battery

A power battery, comprising a power battery cover, wherein the power battery cover comprises:

• a top cover sheet;
• a terminal pressing block arranged above the top cover sheet;
• a pole bottom plate arranged below the top cover sheet;
• composite poles formed from a copper-aluminum composite plate by means of a cold heading or stamping process, wherein each of the composite poles sequentially passes through the terminal pressing block, the top cover sheet and the pole bottom plate from top to bottom, each of the composite poles comprises an aluminum base part and a copper base part connected to each other, the aluminum base part is arranged on the copper base part, end surfaces by which the aluminum base part is connected to the copper base part form a composite connection surface, and the copper base part is connected to the pole bottom plate;
• and
• a sealing member sleeved on the composite pole and sandwiched between the composite pole and the top cover sheet, wherein the sealing member covers the composite connection surface in a sealing manner.