Secondary battery and method for manufacturing the same

A secondary battery comprising:

• a lower plastic member and a substrate stacked along a first direction;
• a positive terminal and a negative terminal spaced apart along a second direction,
• wherein the positive terminal and the negative terminal sequentially pass through the lower plastic member and the substrate along the first direction respectively,
• wherein the positive terminal comprises a bottom plate abutting against a side of the lower plastic member away from the substrate, and a main body portion located on the bottom plate, and
• wherein the main body portion passes through the lower plastic member and the substrate;
• a positive upper plastic member sleeved over one end of the positive terminal, and a negative upper plastic member sleeved over one end of the negative terminal,
• wherein the positive upper plastic member and the negative upper plastic member comprise a same insulating material, and along the second direction, the positive upper plastic member is further located between the positive terminal and the substrate;
• and
• a positive sealing ring located between the positive terminal and the lower plastic member along the second direction,
• wherein a partial region of the lower plastic member abutting against the bottom plate is doped with a conductive material to achieve ohmic contact of the partial region of the lower plastic member with the substrate and the bottom plate, or
• wherein the secondary battery further comprises a conductive structure embedded into an end portion of at least one of the lower plastic member, the positive upper plastic member, or the positive sealing ring, and different regions of the conductive structure are in ohmic contact with the substrate and the positive terminal, respectively.