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Solid Oxide Fuel Cell Stacks and Battery Systems

A technology of fuel cell system and solid oxide, which is applied in the direction of fuel cell, fuel cell auxiliary agent, fuel cell heat exchange, etc., can solve problems such as complex operation, increase the heat exchange area, solve the problem of thermal stress that is difficult to amplify, and avoid The effect of uneven thermal stress

Active Publication Date: 2021-07-02
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device heats the raw gas at the expense of the combustible gas in the combustion part. At the same time, the control of the flame distribution has a great influence on the thermal stress of the fuel cell, and the operation is more complicated.

Method used

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  • Solid Oxide Fuel Cell Stacks and Battery Systems
  • Solid Oxide Fuel Cell Stacks and Battery Systems
  • Solid Oxide Fuel Cell Stacks and Battery Systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment adopts a two-stage battery pack series-connected solid fuel cell system, such as Figure 5 As shown, the system includes a flue gas heat exchanger, an air heat exchanger, an exhaust gas combustion boiler, two solid fuel cell stacks, and an electric heater, where the anode feed gas is CO and H 2 A mixture of gases, CO and H 2 The volume ratio of the cathode is 1:1, and the cathode raw material gas is air.

[0062] The cathode feed gas at room temperature is heated to 650°C by a flue gas heat exchanger, and then enters the multi-channel end panel of battery pack one (such as figure 2 shown), and then enter the multi-channel end panel of battery pack two (as shown in figure 2 As shown), after gas distribution again, it enters the cathode of the second battery pack, and the oxygen molecules get electrons and are reduced to oxygen ions; the oxygen ions pass through the electrolyte membrane under the action of the driving force of the potential difference ...

Embodiment 2

[0069] This embodiment adopts a four-stage battery pack series-connected solid fuel cell system, such as Image 6 As shown, the system includes a flue gas heat exchanger, an air heat exchanger, an exhaust combustion boiler, four solid fuel cell stacks, and an electric heater, where the anode feed gas is CO and H 2 A mixture of gases, CO and H 2 The volume ratio of the cathode is 1.5:1, and the cathode raw material gas is air.

[0070] Operate the battery system according to the method of Example 1. The difference is that the battery system includes four solid fuel cell stacks. After the system runs stably, the temperature of the outlet gas (including anode tail gas and cathode tail gas) after the tetraoxidation reaction of the battery pack can reach 805°C, the temperature of the outlet gas (including anode tail gas and cathode tail gas) after the trioxidation reaction of the battery pack can reach 838°C, the temperature of the outlet gas (including anode tail gas and cathode ...

Embodiment 3

[0072] This embodiment adopts a two-stage battery pack series-connected solid fuel cell system, such as Figure 5 As shown, the system includes a flue gas heat exchanger, an air heat exchanger, an exhaust combustion boiler, two solid fuel cell stacks, and an electric heater, where the anode feed gas is CO and H 2 A mixture of gases, CO and H 2 The volume ratio of the cathode is 1:1, and the cathode raw material gas is air.

[0073] Operate the battery system according to the method of Example 1, the difference is that the end panels on both sides of the cathode and anode of the battery pack of the battery system are as follows image 3 As shown in the end panel (that is, the hollow is a multi-channel end panel), after the system runs stably, the temperature of the outlet gas (including anode tail gas and cathode tail gas) after the carbon dioxide reaction of the battery pack can reach 712°C, and the temperature of the battery pack one oxidation reaction The temperature of th...

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Abstract

The invention relates to the field of solid oxide fuel cells, in particular to a solid oxide fuel cell stack and a battery system. The battery pack includes: battery slices (1) and end plates (2) respectively arranged on the cathode side and the anode side of the battery slices; the end plates include low-temperature raw material gas inlets (21), high-temperature raw material gas outlets (22), high-temperature A reaction gas inlet (23), a low-temperature reaction gas outlet (24); the raw material gas and the reaction gas are separated by a heat-conducting material, and the heat carried by the reaction gas is transferred to the raw material gas through the heat-conducting material. The battery system includes at least two battery packs. After the battery system of the present invention starts and runs normally, the whole process can realize no external heat supply, the overall battery efficiency is about 10% higher than that of the traditional battery, and the conversion rate of the anode gas can reach more than 65%.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells, in particular to a solid oxide fuel cell stack and a battery system. Background technique [0002] Solid oxide fuel cells (SOFCs) use solid oxides as electrolytes, which have the ability to transport O at high temperatures 2- ability to play a role in conducting O in the battery 2- and the role of separating oxidant and fuel. At the cathode, oxygen molecules get electrons and are reduced to oxygen ions; under the action of the potential difference on both sides of the electrolyte membrane and the driving force of the oxygen concentration difference, the oxygen ions transition to the anode side through the oxygen vacancies in the electrolyte membrane, and the combustibles on the anode side ( h 2 , CO and CH 4 ) undergoes an oxidation reaction with oxygen ions, and loses electrons, releasing heat. The migration of electrons between the cathode and anode forms an electric current to genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1231H01M8/04014H01M8/2425
CPCH01M8/04014H01M8/04022H01M8/2425H01M2008/1293H01M8/1231Y02E60/50
Inventor 崔鑫巴黎明常彬杰李轩闫学良高星孙永伟
Owner CHNA ENERGY INVESTMENT CORP LTD