Alkaline storage battery

An alkaline storage battery comprising:

• an electrode group that includes a positive electrode with a belt shape, a negative electrode with a belt shape, and a separator with a belt shape and located between the positive electrode and the negative electrode, the positive electrode, the negative electrode, and the separator being stacked on top of each other to wind in a spiral shape such that a negative electrode active material of the negative electrode is exposed on an outermost surface of the electrode group;
• an outer can with a bottomed cylindrical shape in which the electrode group is housed together with an alkaline electrolyte, the outer can having an opening at its top, wherein the outer can has an inner-side-surface that is electrically connected to the negative electrode by being in direct physical contact with the negative electrode active material exposed on the outermost surface of the electrode group;
• a sealing body that seals the opening of the outer can;
• and
• a positive terminal electrically connected to the sealing body,
• wherein
• the positive electrode includes a positive electrode body with a belt shape and a positive electrode protrusion protruding from a portion of the positive electrode body toward the sealing body to connect electrically to the sealing body by being in direct physical contact with the sealing body, the positive electrode body and the positive electrode protrusion both being wound in the spiral shape with the negative electrode and the separator,
• the negative electrode includes a negative electrode body with a belt shape and a negative electrode protrusion protruding from a portion of the negative electrode body toward the sealing body and terminating between the sealing body and the negative electrode body,
• the positive electrode and the negative electrode have a positive electrode active material and a negative electrode active material, respectively, in portions facing each other with the separator therebetween,
• the positive electrode active material is disposed across the entirety of each surface of the positive electrode, including the positive electrode protrusion, that faces the negative electrode with the separator therebetween,
• the negative electrode active material is disposed across the entirety of each surface of the negative electrode, including the negative electrode protrusion, that faces the positive electrode with the separator therebetween, and
• the inner-side-surface of the outer can functions as a negative terminal without using a negative lead tab.