Cell unit body structure and metal fuel cell

The utility model discloses a cell unit body structure and a cell combination mode, and belongs to the technical field of fuel cells. The battery comprises a battery body, wherein the battery body is constructed into an annular hollow structure; the upper end of the battery body is provided with an upper joint and/or the lower end of the battery body is provided with a lower joint; the air electrode is mounted on the side surface of the battery body, and the air electrode is configured to be symmetrical with the axis of the battery body; the metal cathode is positioned in the battery body; and the current collectors are arranged on the air electrodes and are used for guiding flow of the air electrodes of the two adjacent battery bodies. The battery bodies are spliced through the upper connector and the lower connector, and are connected in parallel through the current collector, so that the reaction area of the air electrode and the metal negative electrode is increased equivalently. Therefore, different numb