The utility model discloses a polymeric electrical core, comprising an electrical core housing with a cavity, the cavity is filled with polymers and the fringe of inner-concave wedged cavity laceworks are pressed around the electrical core housing. The inner-concave wedged cavity laceworks are uniformly distributed around the fringe of the electrical core housing. The positive electrode tablet and the negative electrode tablet of the electrical core are sleeved in a membrane. The utility model eliminates drapes formed at different places around the cavity when the plastic-aluminum composite housing of the electrical core is stamped into a cavity, and solves the technology problems of edge seal and flanging of non-right-angle electrical cores. The polymeric electrical core with laceworks is different from the similar products obviously in terms of appearance, gives prominence to the appearance of the products and enables the products to be more beautiful and standardized. Additionally, the laceworks on the electrical core housing plays a role of a strengthening rib, thus the utility model improves the sealing intensity of the electrical core housing and strengthens the battery edge seal and then ensures the quality of the battery. As the positive electrode tablet and the negative electrode tablet of the electrical core are sleeved in a membrane, the process is simpler and more stable.