Detachable solid oxide fuel cell stack

Abstract

A detachable solid oxide fuel cell stack is disclosed. The detachable solid oxide fuel cell stack comprises a base, a negative electrode end plate, a positive electrode end plate and element cells; the two ends of the base are fixedly connected with the bottoms of the negative electrode end plate and the positive electrode end plate respectively; the top parts of the negative electrode end plate and the positive electrode end plate are connected through thermal baffles; the multiple compacted element cells are arranged between the negative electrode end plate and the positive electrode end plate; the bottom of each element cell is connected with a gas distributing plate; the top of each element cell is connected with a combustion area; and the top of each element cell passes through the thermal baffle. The detachable solid oxide fuel cell stack has the beneficial effects that: the repeated units are detachable, so that the service life of the cell stack is prolonged greatly and the cost of the cell stack is reduced; and compared with the conventional laminated type cell stack, each element cell is not affected by the gravity of other cells, and the stress environment is uniform and controllable, so that the prolonging of the service life of the cell stack can be facilitated.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a detachable solid oxide fuel cell stack. Background technique [0002] Solid oxide fuel cell is a high-efficiency energy conversion device, which has the advantages of wide fuel adaptability, no noble metal catalyst, all-solid structure, long life, and no pollution. However, its industrialization process is limited by cost, and an important reason for the high cost is that the stack cannot be disassembled due to its high-temperature sealed structure, and it is inconvenient to test the electrochemical performance of the single cell before stacking. This puts forward extremely strict requirements on the consistency of single cells. Before the consistency of the single cells is not perfect, the insufficient performance of a single cell in the stack may become a short board that restricts the performance of the entire stack, and the damage of a single cell is equival...

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Problems solved by technology

[0003] Search Chinese patents and you can find 3 detachable battery stack designs. Among them, the invention patent CN101373843A aims at the air intake of each battery separately, which not only complicates the gas management, but also each connecting plate must be thick enough to ensure the welding of the intake pipe. It affects the volumetric power density of the stack; the patent CN100449846C sets up air inlet and outlet holes horizontally on each connecting plate, and requires the battery to be brazed at a special position on the inner frame of the connecting plate, which is not only complicated to process, but also the connecting plate is very thick. Huge volume; the patent CN1252844 arranges and seals multiple connection plates in a plane frame, which also has the disadvantages of complex structure and low yield, and the frame made of ceramics used for insulation is very difficult to process

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