CN212033147U

CN212033147U - Environment-friendly fuel cell stack

Info

Publication number: CN212033147U
Application number: CN202020574198.5U
Authority: CN
Inventors: 彭文财; 左晨东
Original assignee: Suzhou Guolv New Material Technology Co ltd
Current assignee: Suzhou Guolv New Material Technology Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-11-27
Anticipated expiration: 2030-04-17

Abstract

The utility model discloses an environment-friendly fuel cell stack, wherein a top cover is arranged at the top of an outer shell, one end of a cell tube is a sealing end, the other end of the cell tube is an opening end, and a plurality of cell tubes are respectively embedded into first through holes corresponding to a cell tube fixing disc; an anode exhaust cavity is formed between the battery tube fixing disc and the vent pipe fixing disc, and the opening end of the battery tube is positioned in the anode exhaust cavity; the battery comprises a battery tube, a vent pipe, a plurality of foam nickel blocks and a protective layer, wherein the outer surface of the vent pipe is printed with at least one anode conductive bar, each anode conductive bar is welded with a plurality of foam nickel blocks at intervals, the exposed area of the anode conductive bar at the periphery of each foam nickel block is covered with the protective layer, and the vent pipe is embedded into the battery tube and is in interference fit contact with the battery tube through the foam nickel blocks on the outer surface of the. The utility model discloses both reduced high temperature working position seal structure quantity, reduced the gas leakage risk, need not to carry out machining to the battery pipe again for the specific energy density of ability battery is high.

Description

Environment-friendly fuel cell stack

Technical Field

The utility model relates to a fuel cell field especially relates to an environment-friendly fuel cell stack.

Background

An environment-friendly Fuel Cell Stack (SOFC) belongs to the third-generation Fuel Cell and is an all-Solid-state chemical power generation device which can directly convert chemical energy stored in Fuel and oxidant into electric energy at medium and high temperature with high efficiency and environmental friendliness.

SOFCs have high power density with greater energy output at the same volume/weight; the SOFC has no noise and pollution, only generates chemical reaction when in work, has no mechanical movement structure, and has water as main emission; the modularized cell pack can be modularized, and a plurality of single cells can be assembled into the cell pack in series, parallel and the like to adapt to application requirements of different scenes; the available fuels are various and easy to obtain, and hydrogen, hydrocarbon, methanol and the like can be directly used as fuels without using noble metals as catalysts; all solid-state structure, no pollutant leakage risk.

On the other hand, current collection plays a very important role in aspects such as SOFC efficiency, and the prior art has the following solutions,

the patent of application No. 2013100472563 adopts a method of filling nickel blanket between the air inlet pipe and the anode supporting pipe to carry out anode current collection, and because the coverage area is large, the method greatly reduces the effective reaction area of the anode, so that the specific energy density of the battery is greatly reduced;

the patent of application No. 2005101014873 uses a cone-shaped battery tube, in which the cathode at the outer edge of the small open end of the battery tube is sealed with the anode at the inner edge of the large open end of another monomer by connecting and encapsulating materials, the conductivity of the battery cathode material is relatively poor, the high-temperature airtight difficulty of the connection port of the battery cathode and the anode is high, and the internal short circuit phenomenon of the battery is easily caused due to poor sealing;

the patent of application No. 2017107674600 discloses a method for anode current collection by grooving the cell tube, which destroys the cell tube surface structure, reduces the mechanical properties of the cell tube, and the hardness of the ceramic material is high, and grooving is difficult. How to overcome the above technical problems is the direction of efforts of those skilled in the art.

Disclosure of Invention

The utility model aims at providing an environment-friendly fuel cell stack, this environment-friendly fuel cell stack had both reduced high temperature working position seal structure quantity, had reduced the gas leakage risk, and the gaseous reverse flow of positive pole business turn over, had both been favorable to improving reaction contact time, and the generating efficiency is high, has also avoided cold and hot impact for the thermal efficiency and the life of battery are high, and enable the specific energy density of battery high, have also avoided the inside short circuit of battery, have improved the reliability of battery.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an environment-friendly fuel cell stack comprises an outer shell, an inner shell, a plurality of cell tubes and a top cover with a gas inlet, wherein the top cover is arranged at the top of the outer shell, one end of each cell tube is a sealed end, the other end of each cell tube is an open end, the plurality of cell tubes are respectively embedded into first through holes corresponding to a cell tube fixing disc, an inner cavity is formed between the inner shell and the cell tube fixing disc positioned at the top of the inner shell, the sealed ends of the plurality of cell tubes are positioned in the inner shell, one ends of a plurality of breather tubes with openings at two ends are respectively embedded into the cell tubes, and the other ends of the breather tubes are respectively embedded into second through holes corresponding to a;

an anode exhaust cavity is formed between the battery tube fixing disc and the vent pipe fixing disc, the opening end of the battery tube is positioned in the anode exhaust cavity, and an anode exhaust port communicated with the anode exhaust cavity is formed in the side surface of the outer shell;

the top of the inner shell, which is close to the battery tube fixing disc, is provided with a cathode inner shell exhaust port, the lower part of the inner shell is provided with a cathode inner shell air inlet, and the cathode inner shell air inlet is positioned below the battery tube;

the cathode air inlet pipes are positioned in an outer cavity formed by the outer shell, the inner shell and the battery tube fixing disc and are connected with a cathode inner shell air inlet of the inner shell and a cathode inner shell air inlet of the outer shell, and the ignition tube sequentially penetrates through the outer shell and the inner shell and is communicated with the inner cavity; the bottom of the outer shell is provided with a plurality of cathode exhaust ports, and the cathode exhaust ports of the outer shell are all provided with a fan;

the outer surface of the vent pipe is printed with at least one anode conductive bar, each anode conductive bar is welded with a plurality of foamed nickel blocks at intervals, the exposed area of the anode conductive bar at the periphery of the foamed nickel block is covered with a protective layer, and the vent pipe is embedded into the battery tube and is in interference fit contact with the battery tube through the foamed nickel block positioned on the outer surface of the vent pipe;

at least one cathode conductive bar is printed on the outer surface of the battery tube along the axial direction, a spiral cathode conductive wire is wound on the outer surface of the battery tube, and the cathode conductive bar is positioned between the spiral cathode conductive wire and the outer surface of the battery tube; the cathode conductive strip of the battery tube is electrically connected with the anode conductive strip of the vent pipe in the adjacent battery tube through a current collecting strip.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the exhaust port of the cathode inner shell is a notch groove positioned on the top surface of the inner shell.

2. In the scheme, the number of the anode conducting strips of the vent pipe is 4, and the anode conducting strips are distributed at equal intervals along the circumferential direction of the vent pipe.

3. In the above scheme, the plurality of cathode air inlet pipes are arranged at equal intervals along the circumferential direction of the inner shell.

4. In the above scheme, the plurality of cell tubes are arranged in a circular array.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

1. the utility model discloses environment-friendly fuel cell stack, its battery pipe one end is sealed end, the other end is the open end, a plurality of battery pipe imbeds a battery pipe fixed disk respectively, a plurality of both ends open-ended breather pipe one end imbeds respectively in the battery pipe, the structure of single-end closed battery pipe with the breather pipe and the mode of single-end business turn over gas have been adopted, both reduced high temperature work position seal structure quantity, reduced the risk of leaking gas, and positive pole business turn over gas reverse flow, existing be favorable to improving reaction contact time, the generating efficiency is high, also progressively preheat the gas in the breather pipe before the reaction, cold and hot impact has been avoided, make the thermal efficiency and the life of battery high; and the outer shell, the inner shell and the battery tube fixing disc form an outer cavity, the bottom of the outer shell is provided with a plurality of cathode exhaust ports, the cathode exhaust ports of the outer shell are respectively provided with a fan, negative pressure is formed in the outer cavity formed by the outer shell and the inner shell, gas after cathode reaction is pumped out from the exhaust ports of the inner shell of the cathode, and the temperature of the battery can be controlled by adjusting the exhaust volume of the fan.

2. The utility model discloses environment-friendly fuel cell pile, a plurality of its sealed end of battery pipe is located the inner casing, the top that the interior casing is close to the battery pipe fixed disk is opened there is negative pole inner shell gas vent, open the interior casing lower part has a negative pole inner shell air inlet, and negative pole inner shell air inlet is located the battery pipe below, and the negative pole adopts the business turn over air current reverse, has not only been favorable to improving reaction contact time, and the generating efficiency is high, has increased the generating efficiency.

3. The utility model discloses an environment-friendly fuel cell stack, its breather pipe surface printing has at least one positive pole conducting strip, weld several foam nickel pieces on every positive pole conducting strip at intervals, this positive pole conducting strip is located the peripheral region that exposes of foam nickel piece and covers a protective layer, the breather pipe imbeds in the battery pipe and contacts with the battery pipe interference fit through the foam nickel piece that is located its outer surface; at least one cathode conductive bar is printed on the outer surface of the battery tube along the axial direction, a spiral cathode conductive wire is wound on the outer surface of the battery tube, and the cathode conductive bar is positioned between the spiral cathode conductive wire and the outer surface of the battery tube; the cathode conducting strip of the battery tube is electrically connected with the anode conducting strip of the vent tube in the adjacent battery tube through a current collecting belt, the current collection does not need to destroy the vent tube and the battery tube, the air tightness and the mechanical property are not influenced, the contact area of the current collecting point and the battery is small, the vent tube does not need to be machined, the specific energy density of the battery is high, the internal short circuit of the battery is avoided, and the reliability of the battery is improved.

Drawings

FIG. 1 is a schematic structural diagram of an environmentally friendly fuel cell stack according to the present invention;

FIG. 2 is a schematic view of a partially exploded structure of an environmentally friendly fuel cell stack according to the present invention;

FIG. 3 is a schematic cross-sectional view of an environmentally friendly fuel cell stack according to the present invention;

FIG. 4 is a schematic view of a partial structure of an environmentally friendly fuel cell stack according to the present invention;

FIG. 5 is a schematic diagram showing a partial structural decomposition of an environmentally friendly fuel cell stack according to the present invention;

fig. 6 is a schematic diagram of a second exploded view of a local structure of an environmentally friendly fuel cell stack according to the present invention.

In the above drawings: 1. an outer housing; 101. a cathode exhaust port; 102. a cathode gas inlet; 2. an inner housing; 3. a battery tube; 31. sealing the end; 32. an open end; 4. a top cover; 41. a gas inlet; 5. a battery tube fixing disc; 51. a first through hole; 6. an inner cavity; 7. a breather pipe; 71. an opening; 8. a breather pipe fixing disc; 81. a second through hole; 9. an anode exhaust cavity; 11. an anode exhaust port; 121. a cathode inner shell exhaust port; 122. a cathode inner shell gas inlet; 13. a cathode gas inlet pipe; 14. an outer cavity; 15. an igniter tube; 16. a fan; 17. an anode conductive strip; 18. a foamed nickel block; 19. a protective layer; 20. a cathode conductive strip; 21. a helical cathode conductive wire; 22. a collector strip.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

Example 1: an environment-friendly fuel cell stack comprises an outer shell 1, an inner shell 2, a plurality of cell tubes 3 and a top cover 4 with a gas inlet 41, wherein the top cover 4 is installed at the top of the outer shell 1, one end of each cell tube 3 is a sealed end 31, the other end of each cell tube 3 is an open end 32, the plurality of cell tubes 3 are respectively embedded into first through holes 51 corresponding to cell tube fixing disks 5, inner cavities 6 are formed between the inner shell 2 and the cell tube fixing disks 5 positioned at the top of the inner shell 2, the sealed ends 31 of the plurality of cell tubes 3 are positioned in the inner shell 2, one ends of vent pipes 7 with two ends being opened 71 are respectively embedded into the cell tubes 3, and the other ends of the vent pipes 7 are respectively embedded into second through holes 82 corresponding to vent pipes 8;

an anode exhaust cavity 9 is formed between the battery tube fixing disc 5 and the vent pipe fixing disc 8, the opening end 32 of the battery tube 3 is positioned in the anode exhaust cavity 9, and an anode exhaust port 11 communicated with the anode exhaust cavity 9 is formed in the side surface of the outer shell 1;

the top of the inner shell 2, which is close to the battery tube fixing disc 5, is provided with a cathode inner shell air outlet 121, the lower part of the inner shell 2 is provided with a cathode inner shell air inlet 122, and the cathode inner shell air inlet 122 is positioned below the battery tube 3;

a plurality of cathode inlet pipes 13 are positioned in an outer cavity 14 formed by the outer shell 1, the inner shell 2 and the battery tube fixing disc 5 and are connected with a cathode inner shell inlet 122 of the inner shell 2 and a cathode inner shell inlet 122 of the outer shell 1, and an ignition pipe 15 sequentially penetrates through the outer shell 1 and the inner shell 2 and is communicated with the inner cavity 6; the bottom of the outer shell 1 is provided with a plurality of cathode exhaust ports 101, and the cathode exhaust ports 101 of the outer shell 1 are all provided with a fan 16;

at least one anode conductive strip 17 is printed on the outer surface of the vent pipe 7, a plurality of foamed nickel blocks 18 are welded on each anode conductive strip 17 at intervals, a protective layer 19 covers the exposed area of the anode conductive strip 17 at the periphery of the foamed nickel block 18, and the vent pipe 7 is embedded in the battery tube 3 and is in interference fit contact with the battery tube 3 through the foamed nickel blocks 18 on the outer surface of the vent pipe;

at least one cathode conductive strip 20 is axially printed on the outer surface of the battery tube 3, a spiral cathode conductive wire 21 is wound on the outer surface of the battery tube 3, and the cathode conductive strip 20 is positioned between the spiral cathode conductive wire 21 and the outer surface of the battery tube 3; the cathode conductive strip 20 of the cell tube 3 is electrically connected to the anode conductive strip 17 of the vent tube 7 in the adjacent cell tube 3 via a collector strip 22.

Example 2: an environment-friendly fuel cell stack comprises an outer shell 1, an inner shell 2, a plurality of cell tubes 3 and a top cover 4 with a gas inlet 41, wherein the top cover 4 is installed at the top of the outer shell 1, one end of each cell tube 3 is a sealed end 31, the other end of each cell tube 3 is an open end 32, the plurality of cell tubes 3 are respectively embedded into first through holes 51 corresponding to cell tube fixing disks 5, inner cavities 6 are formed between the inner shell 2 and the cell tube fixing disks 5 positioned at the top of the inner shell 2, the sealed ends 31 of the plurality of cell tubes 3 are positioned in the inner shell 2, one ends of vent pipes 7 with two ends being opened 71 are respectively embedded into the cell tubes 3, and the other ends of the vent pipes 7 are respectively embedded into second through holes 82 corresponding to vent pipes 8;

The cathode inner casing exhaust port 121 is a notch groove located on the top surface of the inner casing 2.

The number of the anode conducting strips of the vent pipe is 4, and the anode conducting strips are distributed at equal intervals along the circumferential direction of the vent pipe.

The plurality of cathode inlet pipes 13 are arranged at equal intervals in the circumferential direction of the inner housing 2.

The plurality of battery tubes 3 are arranged in a circular array.

When the environment-friendly fuel cell stack is adopted, the structure of a single-head closed cell tube and a vent pipe and the mode of single-head gas inlet and outlet are adopted, so that the number of sealing structures at a high-temperature working part is reduced, the risk of gas leakage is reduced, the anode gas inlet and outlet flow in reverse directions, the reaction contact time is favorably improved, the power generation efficiency is high, the gas in the vent pipe is gradually preheated before reaction, the cold and hot impact is avoided, and the thermal efficiency and the service life of the cell are high; in addition, the cathode adopts the reverse direction of the air flow, which is beneficial to improving the reaction contact time, has high power generation efficiency and increases the power generation efficiency; in addition, the current collection does not need to destroy the vent pipe and the battery pipe, the air tightness and the mechanical property are not influenced, the contact area of the current collection point and the battery is small, and the vent pipe does not need to be machined, so that the specific energy density of the battery is high, the internal short circuit of the battery is avoided, and the reliability of the battery is improved; in addition, negative pressure is formed in an outer cavity formed by the outer shell and the inner shell, gas after cathode reaction is pumped out from an exhaust port of the inner shell of the cathode, and the temperature of the battery can be controlled by adjusting the exhaust volume of the fan.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An environment-friendly fuel cell stack, characterized by: comprises an outer shell (1), an inner shell (2), a plurality of battery tubes (3) and a top cover (4) with a fuel gas inlet (41), the top cover (4) is arranged at the top of the outer shell (1), one end of each battery tube (3) is a sealing end (31), the other end of each battery tube is an opening end (32), the plurality of battery tubes (3) are respectively embedded into first through holes (51) corresponding to battery tube fixing discs (5), an inner cavity (6) is formed between the inner shell (2) and a battery tube fixing disc (5) positioned at the top of the inner shell (2), the sealing ends (31) of a plurality of battery tubes (3) are positioned in the inner shell (2), one ends of a plurality of vent pipes (7) with openings (71) at two ends are respectively embedded into the battery tubes (3), and the other ends of the plurality of vent pipes (7) are respectively embedded into second through holes (82) corresponding to a vent pipe fixing disc (8);

an anode exhaust cavity (9) is formed between the battery tube fixing disc (5) and the vent pipe fixing disc (8), the opening end (32) of the battery tube (3) is positioned in the anode exhaust cavity (9), and an anode exhaust port (11) communicated with the anode exhaust cavity (9) is formed in the side surface of the outer shell (1);

the top of the inner shell (2), which is close to the battery tube fixing disc (5), is provided with a cathode inner shell exhaust port (121), the lower part of the inner shell (2) is provided with a cathode inner shell air inlet (122), and the cathode inner shell air inlet (122) is positioned below the battery tube (3);

a plurality of cathode air inlet pipes (13) are positioned in an outer cavity (14) formed by the outer shell (1), the inner shell (2) and the battery tube fixing disc (5) and are connected with a cathode inner shell air inlet (122) of the inner shell (2) and a cathode inner shell air inlet (122) of the outer shell (1), and a lighting pipe (15) sequentially penetrates through the outer shell (1), the inner shell (2) and the inner cavity (6) to be communicated; the bottom of the outer shell (1) is provided with a plurality of cathode exhaust ports (101), and the cathode exhaust ports (101) of the outer shell (1) are all provided with a fan (16);

the outer surface of the vent pipe (7) is printed with at least one anode conductive strip (17), each anode conductive strip (17) is welded with a plurality of foamed nickel blocks (18) at intervals, the anode conductive strips (17) are covered with a protective layer (19) in the area exposed at the periphery of the foamed nickel blocks (18), and the vent pipe (7) is embedded into the battery tube (3) and is in interference fit contact with the battery tube (3) through the foamed nickel blocks (18) on the outer surface of the vent pipe;

at least one cathode conductive strip (20) is axially printed on the outer surface of the battery tube (3), a spiral cathode conductive wire (21) is wound on the outer surface of the battery tube (3), and the cathode conductive strip (20) is positioned between the spiral cathode conductive wire (21) and the outer surface of the battery tube (3); the cathode conducting strip (20) of the cell tube (3) is electrically connected with the anode conducting strip (17) of the vent tube (7) in the adjacent cell tube (3) through a current collecting strip (22).

2. The environmentally friendly fuel cell stack of claim 1, wherein: the cathode inner shell exhaust port (121) is a notch groove positioned on the top surface of the inner shell (2).

3. The environmentally friendly fuel cell stack of claim 1, wherein: the number of the anode conducting strips (17) of the vent pipe (7) is 4, and the anode conducting strips are distributed at equal intervals along the circumferential direction of the vent pipe (7).

4. The environmentally friendly fuel cell stack of claim 1, wherein: the cathode air inlet pipes (13) are arranged at equal intervals along the circumferential direction of the inner shell (2).

5. The environmentally friendly fuel cell stack of claim 1, wherein: the plurality of battery tubes (3) are arranged in a circular array.