The invention discloses an upper insulating plate of a cylindrical-structured
lithium battery. The upper insulating plate of the cylindrical-structured
lithium battery comprises an upper insulating plate body, and is characterized in that the upper insulating plate body is arch-shaped, a center hole is formed in the insulating plate body, and a thin film is covered on the top of the center hole; a cylindrical baffle is downwards arranged along the circumferential direction of the center hole, and a plurality of groups of
diffusion inclined hole groups are formed from the center hole to the outer rim of the upper insulating plate body in the upper insulating plate body; each group of
diffusion inclined hole groups is composed of a plurality of
diffusion inclined holes, and the sizes of the diffusion inclined holes increase in sequence from the center hole of the upper insulating plate body to the outer rim of the upper insulating plate body; a guide plate group which is composed of a plurality of guide plates is arranged on the bottom of the upper insulating plate body, and is further arranged on the outer side of the cylindrical baffle, and
electrolyte solutions, flowing through the plurality of groups of diffusion inclined hole groups, enters the interior of the battery core of the
lithium battery along the guide plate group when in use. The upper insulating plate of the cylindrical-structured
lithium battery has the advantages that when
electrolyte solution filling is conducted by the cylindrical-structured
lithium battery of the upper insulating plate, the absorption of the
electrolyte solutions is uniform, and the
absorption efficiency is high, so that the absorption problem of the electrolyte solutions on the interior of the battery core of the coiling type cylindrical-structured
lithium battery are well improved and solved.