Battery top cover assembly with welded terminal posts

A battery top cover assembly with welded terminal posts, comprising:

• a top cover plate, two ends of which are provided with mounting holes in the length direction;
• two terminal post structures, each comprising a terminal post portion matching the mounting hole and a terminal post convex ring arranged around the periphery of the terminal post portion, and the top of the terminal post portion being provided with a conductive contact protrusion and a plurality of convex posts;
• a cap positioned above each mounting hole, and provided with a center hole matching the conductive contact protrusion, riveting holes matching the convex posts respectively, and a pressing portion positioned on the periphery of a region with the center hole and the riveting holes;
• a sealing ring positioned below each mounting hole and fitted with the lower surface of the top cover plate;
• a lower insulating part fitted with the lower surface of the top cover plate;
• and
• an upper insulating part positioned above each mounting hole, fitted with the upper surface of the top cover plate, and provided with a first through hole corresponding to a respective mounting hole, wherein the terminal post portion sequentially passes through the sealing ring, the mounting hole, and the first through hole, and the terminal post convex ring is abutted against the sealing ring;
• the cap covers at least a portion of a connecting ring and at least a portion of the upper insulating part, and each convex post passes through a respective riveting hole;
• the periphery of the top of each convex post forms a riveting convex portion;
• the riveting convex portion is pressed on the edge of the upper port of the riveting hole, such that the terminal post convex ring is fastened to the lower insulating part, the cap is pressed against the upper insulating part, and the terminal post structure, the cap, the sealing ring, and the upper insulating part are assembled and fixed on the top cover plate;
• the terminal post portion of the terminal post structure in one mounting hole comprises a copper part and an aluminum part, the aluminum part is welded and fixed to the top of the copper part, the conductive contact protrusion is formed on the top of the aluminum part, the plurality of convex posts are formed on the top of the copper part, the plurality of convex posts extend after passing through the connecting ring positioned on the periphery of the conductive contact protrusion on the aluminum part, and the terminal post convex ring is formed on the periphery of the copper part;
• and the terminal post structure in the other mounting hole is an aluminum terminal post.