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Solid oxide fuel cell stack

A fuel cell stack and solid oxide technology, which is applied in the direction of fuel cells, fuel cell additives, fuel cell grouping, etc., can solve the problems of increasing the manufacturing cost of the battery stack, short circuit of the battery stack, multi-cell stack, etc., and achieve improved stability and output performance, small internal gas pressure difference, and solve the effect of cross-gas

Active Publication Date: 2014-04-09
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main problem of the first type of sealing structure is that during the manufacturing process of the battery stack, because the fuel gas and the oxidant gas are in a sealed environment and the pressure difference is large, the fuel gas and the oxidant gas are prone to gas crossover, resulting in More battery stack waste, which increases the manufacturing cost of the battery stack
Although the second sealing structure can overcome the possibility of high-temperature cross-gas between fuel gas and oxidant gas, in order to ensure that the oxidant gas enters the cathode of the battery, it is necessary to provide an additional oxidant gas chamber. The oxidant gas chamber is easily short-circuited with the battery stack, resulting in The battery stack does not operate stably

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Prepare the following components for backup:

[0065] Single cell: Prepare an anode-supporting single cell sheet with a specification of 10cm×10cm, the anode is , and the cathode is , and an oxidizing gas inlet hole is processed on one edge of the single cell by laser cutting, and the oxidizing gas is connected with the oxidizing gas A fuel gas inlet hole and a fuel gas outlet hole are processed on two vertical edge portions of the edge portion where the air inlet hole is located;

[0066] Connector: The material is SUS430, the thickness is 2.5mm, and the dot matrix arrangement (dot matrix arrangement) round bumps are etched on the anode side and the cathode side of the connector, and the height of the round bumps on both sides is 0.5mm ;according to Figure 4 and Figure 6 As shown, an anode-side sealing edge and a cathode-side sealing edge each having a width of 3.5 mm are machined, wherein the cathode-side sealing edge has an opening.

[0067] Laser cutting is use...

Embodiment 2

[0074] Take the upper collector plate, lower collector plate and 5 pieces of connectors, 5 pieces of oxidizing gas seals, 5 pieces of fuel gas seals, 4 pieces of single cells, and 4 pieces of nickel foam according to the upper collector plate / fuel gas seal / (connector / oxidizing gas seal (nickel foam) / single cell)×4 / connector / oxidizing gas seal / lower collector plate to assemble into a 4-unit cell stack assembly, and then take the bolt assembly to fix the upper collector Flow plate and lower collecting plate.

[0075] The assembled battery stack assembly was heated from room temperature to 850°C over 12 hours, held for 4 hours and then pressurized at 0-200kg to test performance under different conditions. The obtained I-V curves are as follows: Figure 11 shown.

[0076] Figure 11 Middle: when the battery stack prepared in this example is heated at 850°C, 200kg pressure and H 2 :Air=8:19sccm cm -2 Under the same conditions, after 2 hours of reduction, the measured maximum p...

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Abstract

The invention provides a solid oxide fuel cell stack which comprises an upper current collector, a lower current collector and a stacked structure accommodated between the upper current collector and the lower current collector, wherein the stacked structure comprises at least two connecting parts and a cell piece arranged between the two adjacent connecting parts, each connecting part comprises the anode side and the cathode side, an oxidizing gas sealing part is arranged on the anode side of each connecting part, and a fuel gas sealing part is arranged on the cathode side of each connecting part; and a closed oxidizing gas inlet channel, a closed fuel gas inlet channel, a closed fuel gas outlet channel and an open oxidizing gas outlet channel are arranged on the stacked structure. Compared with the prior art, as an oxidizing gas outlet is open, the internal gas pressure difference at the cathode sides of the connecting parts is smaller, the flow is more smooth, the problem of mutual gas moving between fuel gas and oxidizing gas can be effectively solved, the sealing reliability of the stack can be improved, and the finished product rate of the stack and the performance operation stability can be further improved.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, in particular to a solid oxide fuel cell stack. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) belongs to the third-generation fuel cell, which is an all-solid-state chemical energy that converts chemical energy stored in fuel and oxidant into electrical energy efficiently and environmentally friendly at medium and high temperatures. power generation device. Solid oxide fuel cells are broadly classified into two types: a cylindrical type in which electrodes and solid electrolytes are covered around a cylindrical surface, and a planar type in which both solid electrolytes and electrodes are formed in a planar shape. [0003] Compared with cylindrical solid oxide fuel cells, planar solid oxide fuel cells have higher power density per unit volume and are more suitable for use in mobile devices such as automobiles, so they have wider application prospects. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/24H01M8/04H01M8/04089H01M8/2485
CPCY02E60/50Y02P70/50
Inventor 王蔚国官万兵翟惠娟沈圣成牛金奇金乐柯锐
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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