CN219066848U

CN219066848U - Solid oxide fuel cell stack adopting dislocation flow channel

Info

Publication number: CN219066848U
Application number: CN202223385639.5U
Authority: CN
Inventors: 张继红; 王梅; 杨润农
Original assignee: Guangdong Foran Technology Co ltd
Current assignee: Guangdong Foran Technology Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-05-23
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to a solid oxide fuel cell pile adopting a staggered runner, which comprises a plurality of pile monomers stacked, wherein each pile monomer comprises a connector, a cathode, an anode and an electrolyte at two sides of the connector, and a cathode runner and an anode runner with opposite gas flow directions are respectively arranged at two sides of the connector in parallel and close to the cathode and the anode, so that air inlets and air outlets of the two runners respectively correspond to each other, and the temperature difference in the pile is reduced; the cathode flow channels and the anode flow channels are distributed in a staggered manner in the vertical direction, so that the distances from the flow channels in the connector to the other side are equal, and the temperature consistency of the electric pile is improved; the air inlet ends of the cathode flow channel and the anode flow channel are provided with the slow flow channels, so that the flow velocity of gas between the air inlet and the middle position is relatively slow, the reaction efficiency of fuel and air is relatively high at the position close to the air inlet, the heating reaction position is close to the air inlet, and the consistency and the performance of the electric pile are further improved.

Description

Solid oxide fuel cell stack adopting dislocation flow channel

Technical Field

The utility model relates to the technical field of solid oxide fuel cells, in particular to a solid oxide fuel cell stack adopting a staggered runner.

Background

The Solid Oxide Fuel Cell (SOFC) has the advantages of wide fuel adaptability, high energy conversion rate, full solid state, modularized assembly, zero pollution and the like, and can directly use various hydrocarbon fuels such as hydrogen, carbon monoxide, natural gas, liquefied gas, coal gas, biomass energy and the like. The device has wide application prospect in the civil fields of large centralized power supply, medium-sized power distribution, small household cogeneration and the like as a fixed power station and as a mobile power source such as a ship power source, a traffic vehicle power source and the like.

The SOFC monomer mainly comprises electrolyte, anode, cathode and connector, the two-pole gas generates electrochemical reaction discharge under the action of catalyst and electrolyte, and simultaneously emits a large amount of heat, which causes the temperature at the air inlet to be lower than the temperature at the air outlet; when the same plane temperature of the connector is different, the electrochemical reaction rates are also different, so that the current density distribution is also different, the uneven temperature difference distribution of the same plane is further aggravated, the vicious circle is formed, and the performance consistency and the service life of the galvanic pile are greatly destroyed.

Disclosure of Invention

In order to solve the problems, the utility model provides a solid oxide fuel cell stack adopting a staggered runner.

In order to achieve the above object, the present utility model is realized by the following technical scheme:

the utility model provides an adopt solid oxide fuel cell pile of dislocation runner, includes a plurality of pile monomers of piling up, pile monomer includes the connector and negative pole, positive pole and the electrolyte of connector both sides, the both sides of connector just are close to respectively the negative pole with positive pole parallel arrangement has negative pole runner and positive pole runner that the gas flow direction is opposite, negative pole runner with positive pole runner is crisscross in the vertical direction distributes, just negative pole runner with the inlet end of positive pole runner all is equipped with the slow runner.

Further, the slow flow channel comprises a plurality of first straight baffles which are distributed in a staggered mode.

Further, the slow flow channel comprises a plurality of first slow flow structures, and the slow flow structures comprise two first 7-shaped baffles which are distributed in an staggered mode.

Further, the slow flow channel comprises a plurality of second slow flow structures and a plurality of second straight baffles which are distributed in an staggered mode, and the second slow flow structures comprise two second 7-shaped baffles which are distributed in an staggered mode.

Further, the second flow retarding structure is disposed adjacent to the air inlet of the cathode flow channel or the anode flow channel.

Further, the slow flow channel is a serpentine flow channel.

Further, the number of the cathode flow channels and the anode flow channels in the connecting body differ by an absolute value of 1.

The beneficial effects of the utility model are as follows:

1. the gas flowing directions of the cathode flow channel and the anode flow channel are opposite, so that the gas inlets and the gas outlets of the two flow channels are respectively corresponding to each other, and the temperature difference inside the electric pile is reduced;

2. the cathode flow channels and the anode flow channels are distributed in a staggered manner in the vertical direction, so that the distance from the flow channels in the connector to the other side is equal, the distance between the two flow channels which are oppositely arranged in the prior art is far longer than the distance between the two flow channels which are not arranged, and the temperature consistency of the electric pile is further improved;

3. the air inlet ends of the cathode flow channel and the anode flow channel are provided with the slow flow channels, so that the flow velocity of gas between the air inlet and the middle position is relatively slow, the reaction efficiency of fuel and air is relatively high at the position close to the air inlet, and a large amount of heat can be released during the reaction of the fuel and the air, the reaction position is close to the air inlet through the slow flow channels, the temperature difference between the air inlet and the air outlet is further reduced, and the consistency and the performance of the electric pile are further improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a flow chute according to embodiment 1 of the present utility model;

FIG. 3 is a schematic view of the flow chute according to embodiment 2 of the present utility model;

FIG. 4 is a schematic view of the structure of the flow chute in embodiment 3 of the present utility model;

fig. 5 is a schematic structural diagram of a flow chute in embodiment 4 of the present utility model.

In the figure: 1. a cathode; 2. an anode; 3. an electrolyte; 4. a connecting body; 5. an anode flow channel; 6. a cathode flow channel; 7. a first straight baffle; 8. a first 7-shaped baffle; 9. a second 7-shaped baffle; 10. a second straight baffle; 11. serpentine flow channels; 12. an air inlet; 13. and an air outlet.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model for achieving the preset aim, the following detailed description is given below of the specific implementation, structure, characteristics and effects according to the utility model with reference to the attached drawings and the preferred embodiment.

Example 1:

as shown in fig. 1 and 2, a solid oxide fuel cell stack adopting a staggered runner comprises a plurality of stacked stack monomers, wherein each stack monomer comprises a connector 4, and a cathode 1, an anode 2 and an electrolyte 3 at two sides of the connector 4; the two sides of the connecting body 4 are respectively and parallelly provided with a cathode runner 6 and an anode runner 5 which are opposite in gas flow direction and are respectively close to the cathode 1 and the anode 2, wherein the flowing gases at the two sides of the electrolyte 3 are also opposite, namely, the gas flow directions of the cathode runner 6 and the anode runner 5 are opposite, so that the gas inlets 12 and the gas outlets 13 of the two runners respectively correspond to each other, and the temperature difference inside a galvanic pile is reduced;

the cathode flow channels 6 and the anode flow channels 5 are distributed in a staggered manner in the vertical direction, and the quantity phase difference of the cathode flow channels 6 and the anode flow channels 5 in the connector 4 is 1, so that the distance from the flow channels in the connector 4 to the other side is equal, the distance between the two flow channels which are oppositely arranged in the prior art is far greater than the distance between the two flow channels which are not arranged, and the temperature consistency of a galvanic pile is further improved;

and the air inlet ends of the cathode runner 6 and the anode runner 5 are provided with the slow runner, so that the flow velocity of gas between the air inlet 12 and the middle position is relatively slow, the reaction efficiency of fuel and air is relatively high near the air inlet 12, a large amount of heat can be released during the reaction of the fuel and the air, the reaction position is near the air inlet 12 through the slow runner, the temperature difference between the air inlet 12 and the air outlet 13 is further reduced, the consistency and the performance of a galvanic pile are further improved, and particularly, the slow runner comprises a plurality of first straight baffles 7 which are distributed in a staggered manner, the first straight baffles 7 are respectively arranged on two sides of the runner, and the flow velocity of the gas between the air inlet 12 and the middle position is slowed down.

Example 2:

as shown in fig. 1 and 3, unlike embodiment 1, the slow flow channel includes a plurality of first slow flow structures, and the slow flow structures include two first 7-shaped baffles 8 which are staggered, so that the gas slowly flows back and forth to the middle part in the inlet end of the channel, and the flow rate of the gas between the inlet 12 and the middle part is slowed down.

Example 3:

as shown in fig. 1 and 4, the difference from embodiment 1 is that the slow flow channel includes a plurality of second slow flow structures and a plurality of second straight baffles 10 which are distributed in an alternating manner, the second slow flow structures include two second 7-shaped baffles 9 which are distributed in an alternating manner, and the combination of the two slow flow structures slows down the flow rate of the gas between the gas inlet 12 and the middle position; and the second slow flow structure is arranged close to the air inlet 12 of the cathode flow channel 6 or the anode flow channel 5, namely, the air of the air inlet 12 passes through the second 7-shaped baffles 9 which are distributed in a staggered way and then passes through the second straight baffles 10 which are distributed in a staggered way, so that the flow rate of the air between the air inlet 12 and the middle position is faster and faster, and finally, the flow rate of the air between the middle position and the air outlet 13 position is reached, and the flow rate of the air between the air inlet 12 and the middle position is slowed down at a gradual change flow rate.

Example 4:

as shown in fig. 1 and 5, the difference from embodiment 1 is that the flow-retarding passage is a serpentine flow passage 11, which allows smoother gas flow but also slows down the flow rate of the gas from the gas inlet 12 to the middle position.

Although the present utility model has been described in terms of the preferred embodiments, it should be understood that the present utility model is not limited to the specific embodiments, but is capable of numerous modifications and equivalents, and alternative embodiments and modifications of the embodiments described above, without departing from the spirit and scope of the present utility model.

Claims

1. The utility model provides an adopt solid oxide fuel cell pile of dislocation runner, includes a plurality of pile monomers of piling up, pile monomer includes the connector and negative pole, positive pole and the electrolyte of connector both sides, its characterized in that, the both sides of connector just are close to respectively the negative pole with positive pole parallel arrangement has negative pole runner and positive pole runner that the gas flow direction is opposite, negative pole runner with positive pole runner is crisscross in the vertical direction distributes, just negative pole runner with the inlet end of positive pole runner all is equipped with the slow runner.

2. The stack of claim 1 wherein the flow-retarding channels comprise a plurality of first straight baffles in an alternating pattern.

3. The stack of claim 1 wherein the flow channels comprise a plurality of first flow structures comprising two first 7-shaped baffles in staggered arrangement.

4. The stack of claim 1, wherein the flow-retarding channels comprise a plurality of second flow-retarding structures and a plurality of second straight baffles in staggered arrangement, the second flow-retarding structures comprising two second 7-shaped baffles in staggered arrangement.

5. The stack of claim 4 wherein the second flow retarding arrangement is disposed adjacent to the inlet of the cathode flow path or the anode flow path.

6. The stack of claim 1 wherein the flow channels are serpentine.

7. The solid oxide fuel cell stack employing offset flow channels of any one of claims 1-6, wherein the number of cathode flow channels and anode flow channels in the connection differs by an absolute value of 1.