Flat-plate solid oxide fuel cell stack and its cell connectors

Abstract

The invention discloses a cell connecting piece of a flat solid oxide fuel cell stack. The cell connecting piece is provided with a fuel inlet, a fuel outlet, an oxidized gas inlet and an oxidized gas outlet, the edge of the cell connecting piece is provided with an edge sealing area, two sides of the cell connecting piece are respectively provided with a cathode runner and an anode runner, both the fuel inlet and the fuel outlet are communicated with the anode runner, both the oxidized gas inlet and the oxidized gas outlet are communicated with the cathode runner, the anode runner is parallel to the cathode runner, and the fuel inlet and the oxidized gas inlet are arranged on the same side or two opposite sides of the cell connecting piece. The flowing direction of oxidized gas in the cathode runner is identical to or opposite to that of fuel gas in the anode runner, the overall reaction heat of the flat solid oxide fuel cell stack is uniform, the overall temperature gradient is small, and thus the power of the flat solid oxide fuel cell stack is improved.

Description

technical field [0001] The invention relates to the technical field of energy production, in particular to a battery connector of a flat solid oxide fuel cell stack. The present invention also relates to a flat solid oxide fuel cell stack comprising the above-mentioned cell connector. Background technique [0002] A fuel cell is a power generation device that converts chemical energy into electrical energy, and a flat-plate solid oxide fuel cell stack is a commonly used fuel cell discharge device. [0003] like figure 1 As shown, the traditional flat solid oxide fuel cell stack includes a plurality of solid oxide fuel cells and battery connectors arranged between two adjacent solid oxide fuel cells, the battery connectors serve as flat solid oxide fuel cells The main components of the cell stack isolate the oxidizing gas from the fuel gas of two adjacent monolithic solid oxide fuel cells, and the cell connectors can guide the current generated by the electrochemical reacti...

AI Technical Summary

Problems solved by technology

[0004] However, since the anode flow channel 02 and the cathode flow channel 01 are vertically staggered on both sides of the battery connector, the flow directions of the fuel and oxidizing gas in the anode flow channel 02 and the cathode flow channel 01 are also vertically staggered, resulting in a flat plate The proportion of fuel and oxidizing gas in different regions of the solid oxide fuel cell stack is different, so the degree of electrochemical reaction and the power density generated by the flat solid oxide fuel cell stack in different regions are different. The flat solid oxide fuel cell stack The internal temperature difference is large, the heat inside the flat solid oxide fuel cell stack is difficult to discharge smoothly, and the power of the flat solid oxide fuel cell stack is low

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