CN111682239B

CN111682239B - Metal fuel electric pile

Info

Publication number: CN111682239B
Application number: CN202010555916.9A
Authority: CN
Inventors: 刘斌
Original assignee: Shenzhen Green Valley Energy Technology Co ltd
Current assignee: Shenzhen Green Valley Energy Technology Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-05-11
Anticipated expiration: 2040-06-17
Also published as: CN111682239A

Abstract

The invention discloses a metal fuel electric pile, which is characterized in that all fuel cell units in the metal fuel electric pile are accommodated in an accommodating cavity of a shell, and a gas interface, a liquid path interface and a circuit interface of each fuel cell unit are converged or shunted to enable each interface to form a corresponding interface module, the corresponding interface modules are arranged on the shell to form the packaged metal fuel electric pile, and the orientations of the total gas interface, the circuit interface and the liquid path interface are the same after modularization, so that a user can conveniently insert and pull out the metal fuel electric pile.

Description

Metal fuel electric pile

Technical Field

The invention relates to the technical field of galvanic piles, in particular to a metal fuel galvanic pile.

Background

A fuel cell is a chemical device that directly converts chemical energy of fuel into electrical energy, and is also called an electrochemical generator. A plurality of fuel cell units are usually integrated in the metal fuel electric pile, the existing metal fuel electric pile is in a semi-packaging mode or a non-packaging mode, the installation of the plurality of fuel cell units is disordered, the orientations of a gas interface, a circuit interface and a liquid circuit interface of each fuel cell unit are different, the plugging and unplugging directions are different, and the installation and use steps of the metal fuel electric pile are increased.

Disclosure of Invention

The invention mainly solves the technical problem of how to package a metal fuel electric pile.

In one embodiment, a metal fuel cell stack is provided, comprising: the fuel cell system comprises a shell, at least two fuel cell units, a gas interface module, a circuit interface module and a liquid circuit interface module;

the shell is enclosed to form an accommodating cavity, and at least two fuel cell units are accommodated in the accommodating cavity of the shell;

the gas interface module comprises a gas interface, the circuit interface module comprises a circuit interface, and the liquid path interface module comprises a liquid path interface;

the gas interface, the circuit interface and the liquid path interface are arranged on the outer surface of the shell and have the same orientation;

the liquid path interface module is used for inputting electrolyte into the fuel cell unit for chemical reaction and outputting the electrolyte after the chemical reaction from the fuel cell unit;

the fuel cell unit is used for generating electric energy after carrying out chemical reaction on electrolyte; at least two of the fuel cell units are electrically connected in series with each other;

the circuit interface module is used for exporting the electric energy generated by the fuel cell unit through chemical reaction;

the gas interface module is used for leading out gas generated by chemical reaction in the fuel cell unit.

Further, at least two fuel cell units are arranged in the accommodating cavity of the shell at equal intervals;

each fuel cell unit includes an electrolyte interface for inputting and outputting an electrolyte, a positive electrode conductive portion and a negative electrode conductive portion for conduction, and an exhaust port for exhausting gas.

Further, the fuel cell unit further comprises a cell frame, two membrane electrodes and a negative plate sandwiched between the two membrane electrode assemblies;

the battery frame is arranged on the outer peripheral sides of the two membrane electrodes, the electrolyte interface is arranged on the battery frame, and the exhaust port is arranged at the top of the battery frame;

the two surfaces of the negative plate and the two membrane electrodes form a first reaction cavity and a second reaction cavity respectively, and the first reaction cavity and the second reaction cavity are communicated with an electrolyte interface and an exhaust port;

the electrolyte interface is used for inputting and outputting electrolyte, and the first reaction cavity and the second reaction cavity are used for containing electrolyte; the gas outlet is used for discharging gas in the first reaction cavity and the second reaction cavity;

the positive electrode conductive part is arranged on the battery frame and is electrically connected with the membrane electrode, and the positive electrode conductive part is used for leading out positive electrode current; the negative plate is used for leading out negative current.

Further, an opening is formed in the top of the battery frame, and the opening is used for inserting the negative plate into the battery frame;

the negative plate comprises a reaction part and a negative electrode conductive part, the reaction part is arranged in the battery frame, and two surfaces of the reaction part and the two membrane electrodes form a first reaction cavity and a second reaction cavity respectively;

the negative electrode conductive part is arranged at the top of the battery frame and used for leading out negative electrode current.

Further, the gas interface module further comprises a gas channel concentration part, and the gas channel concentration part comprises a gas buffer cavity and at least two unit gas pipes;

the at least two unit gas pipes and the gas interfaces are arranged on the same surface of the gas buffer cavity;

each of the unit gas pipes is used for discharging gas generated by a chemical reaction in the fuel cell unit.

Furthermore, the liquid path interface module also comprises a liquid path shunting part, wherein the liquid path shunting part comprises a shunting base body, a cavity is arranged in the shunting base body, a shunting inlet connected with the liquid path interface is arranged at the bottom end of the cavity, a plurality of unit flow channels are arranged on the top surface of the shunting base body at equal intervals, at least two fan-shaped areas with the same circle center are formed on the top surface of the shunting base body by the unit flow channels, and the lower arc edge of each fan-shaped area is connected with the top edge of the cavity;

each cell flow channel is used to input electrolyte into the fuel cell unit.

Furthermore, the circuit interface module also comprises a plurality of series conductive parts which are arranged at equal intervals, and each series conductive part is arranged at the top of two adjacent fuel cell units;

each series conductive part comprises a conductive support, each conductive support comprises a first side surface, a second side surface and a first bottom surface, the first side surface and the second side surface are arranged oppositely, the first side surface is provided with a first groove and a first reed at intervals, the second side surface is provided with a second groove and a second reed at intervals, the positions of the second reed and the first groove correspond to each other, and the positions of the first reed and the second groove correspond to each other; the first reed is connected with the anode conductive part of one fuel cell unit, and the second reed is connected with the cathode conductive part of the adjacent fuel cell unit of the fuel cell unit;

two of the plurality of series conductive parts arranged at equal intervals are electrically connected to the circuit interface, and the positive conductive part or the negative conductive part of two of the at least two fuel cell units is electrically connected to the circuit interface.

Further, the circuit interface comprises a positive electrode circuit interface and a negative electrode circuit interface;

the liquid path interface comprises an input liquid path interface for inputting the electrolyte and an output liquid path interface for outputting the electrolyte.

Furthermore, the side surface of the shell is provided with an air inlet/outlet, and the air inlet/outlet is provided with a plurality of blades which are arranged at equal intervals.

Further, the cross-sectional shape of the blade is conical.

According to the metal fuel cell stack in the embodiment, all the fuel cell units in the metal fuel cell stack are accommodated in the accommodating cavity of the shell, the gas interfaces, the liquid path interfaces and the circuit interfaces of all the fuel cell units are converged or shunted, so that the interfaces form corresponding interface modules, the corresponding interface modules are arranged on the shell, the encapsulated metal fuel cell stack is formed, and the orientations of the total gas interfaces, the circuit interfaces and the liquid path interfaces are the same after modularization, so that a user can conveniently insert and pull the metal fuel cell stack.

Drawings

FIG. 1 is a schematic diagram of a metal fuel cell stack according to an embodiment;

FIG. 2 is an exploded view of an embodiment of a metal fuel cell stack;

FIG. 3 is a schematic structural view of a fuel cell unit of an embodiment;

FIG. 4 is a side sectional view of a fuel cell unit of an embodiment;

FIG. 5 is a schematic structural diagram of an electrolyte interface according to an embodiment;

FIG. 6 is a top cross-sectional view of a fuel cell unit of an embodiment;

FIG. 7 is a front view of a negative plate of an embodiment;

FIG. 8 is a side view of a negative plate of an embodiment;

FIG. 9 is a schematic diagram of one embodiment of a gas interface module;

FIG. 10 is a schematic structural diagram of a fluid path interface module according to an embodiment;

FIG. 11 is a block diagram of a circuit interface module according to an embodiment;

fig. 12 is a schematic diagram of the connection of the series conductive part and the fuel cell unit of an embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Referring to fig. 1, fig. 1 is a schematic structural diagram of a metal fuel cell stack according to an embodiment, the metal fuel cell stack includes: housing 20, gas interface module 50, circuit interface module 40, and fluid circuit interface module 30.

Referring to fig. 2, fig. 2 is an exploded view of a metal fuel cell stack according to an embodiment, the metal fuel cell stack further includes at least two fuel cell units 10, wherein a housing 20 encloses to form an accommodating cavity, and the at least two fuel cell units 10 are accommodated in the accommodating cavity of the housing. At least two fuel cell units 10 are arranged in the accommodating chamber of the housing at equal intervals in this embodiment.

The gas interface module 50, the circuit interface module 40, and the fluid interface module 30 are partially housed in the housing 20.

The gas interface module 50 includes a gas interface 501, the circuit interface module 40 includes a circuit interface 401, and the fluid path interface module 30 includes a fluid path interface 301.

In this embodiment, the gas interface 501, the circuit interface 401 and the liquid path interface 301 are disposed on the outer surface of the housing, and the gas interface 501, the circuit interface 401 and the liquid path interface 301 are oriented in the same direction. As shown in fig. 1, the circuit interface 401 and the liquid path interface 301 are both located on the bottom surface of the housing 20, the gas interface 501 is located on the top surface of the housing 20, and the gas interface 501, the circuit interface 401 and the liquid path interface 301 are all oriented in the same downward direction, so that the plugging and unplugging directions of the three interfaces are the same, and the plugging and unplugging of the three interfaces are realized by adopting a push-pull manner.

The fuel cell unit 10 is used for generating electric energy after chemical reaction of the electrolyte; at least two fuel cell units 10 are electrically connected in series with each other.

The liquid path interface module 30 is used for inputting the electrolyte into the fuel cell unit 10 to perform a chemical reaction, and outputting the electrolyte after the chemical reaction from the fuel cell unit. In the present embodiment, the electrolyte generates reaction byproducts after the chemical reaction in the fuel cell unit 10, and therefore the electrolyte containing the reaction byproducts needs to be output to the outside of the metal fuel cell stack.

The circuit interface module 40 is used to derive the electrical energy generated by the fuel cell unit 10 through chemical reactions.

The gas interface module 50 is used to conduct away the gases produced by the chemical reactions in the fuel cell unit 10. Since the electrolyte generates gases when chemically reacting in the fuel cell 10, it is necessary to discharge the gases to ensure the normal operation of the fuel cell 10.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a fuel cell unit according to an embodiment, where the fuel cell unit includes a cell frame 101, an electrolyte interface 102, an exhaust port 103, two membrane electrodes 104, and a negative electrode plate 105.

Referring to fig. 4, fig. 4 is a side sectional view of a fuel cell unit according to an embodiment, in which the negative plate 105 is sandwiched between two membrane electrodes 104, two surfaces of the negative plate 105 and the two membrane electrodes 104 respectively form a first reaction cavity 106 and a second reaction cavity 107, and the first reaction cavity 106 and the second reaction cavity 107 are communicated with the electrolyte interface 102 and the exhaust port 103.

The membrane electrode 104 comprises a current collector and coating films arranged on two surfaces of the current collector; the mass flow body is network structure, network structure's mesh is the hexagon. The coating is made of a composite material, and air can be isolated from entering the first reaction cavity 106 and the second reaction cavity 107.

The electrolyte interface 102 is used for inputting and outputting electrolyte, and the first reaction cavity 106 and the second reaction cavity 107 are used for containing electrolyte. The negative electrode plate 105 in this embodiment is an aluminum electrode plate, which may be an aluminum alloy electrode plate, and after the electrolyte is input from the electrolyte interface, the electrolyte chemically reacts with the aluminum electrode plate in the first reaction cavity 106 and the second reaction cavity 107 to generate electric energy, and the generated electric energy is output through the aluminum electrode plate and the membrane electrode, respectively.

Since the electrolyte and the aluminum electrode plate are chemically reacted, some gases are generated, and if the gases stay in the first reaction cavity 106 and the second reaction cavity 107, the chemical reaction between the electrolyte and the aluminum electrode plate is affected, and finally, the performance of the fuel cell is affected.

Therefore, the present embodiment further provides a gas outlet 103 on the cell frame 101 for discharging the gas in the first reaction cavity 106 and the second reaction cavity 107.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an electrolyte interface according to an embodiment, in which the electrolyte interface 102 in the embodiment includes an electrolyte inlet 1021 for inputting electrolyte and an electrolyte outlet 1022 for outputting electrolyte, under a normal operation condition, the electrolyte inlet 1021 continuously inputs electrolyte into the first reaction cavity 106 and the second reaction cavity 107, and the electrolyte flows out from the electrolyte outlet 1022 after a chemical reaction is performed in the first reaction cavity 106 and the second reaction cavity 107, however, there is a possibility that the input and output of the electrolyte in the first reaction cavity 106 and the second reaction cavity 107 cannot be balanced, which results in that the electrolyte in the first reaction cavity 106 and the second reaction cavity 107 exceeds the amount that the electrolyte can be accommodated in the first reaction cavity 106 and the second reaction cavity 107. Therefore, an overflow channel 108 is formed between the sides of the two membrane electrodes 104 and the cell frame 101, and the overflow channel is communicated with the first reaction cavity and the second reaction cavity and is used for accommodating the electrolyte overflowed from the first reaction cavity 106 and the second reaction cavity 107. Referring to fig. 6, fig. 6 is a top sectional view of a fuel cell unit according to an embodiment, in the embodiment, two overflow channels 108 are respectively formed between two sides of the membrane electrode 104 and the side of the cell frame 101, so that there are two overflow channels 108, and a gas outlet 103 is disposed at a position corresponding to the cell frame 101 at the top of each overflow channel 108, that is, the gas outlet 103 is communicated with the overflow channels 108, and gas generated by the reaction is exhausted from the interior of the fuel cell through the overflow channels 108.

In the present embodiment, the electrolyte interface 102 is a bar shape, one end of the bar shape is communicated with the first reaction cavity 106 and the second reaction cavity 107, and the other end comprises a first surface and a second surface, which form a step from the first surface to the second surface; the first surface is used for arranging an electrolyte outlet, and the second surface is used for arranging an electrolyte inlet. Thus, the stepped electrolyte interface is beneficial to the mutual interference between the electrolyte input liquid path and the electrolyte output liquid path, and the volume of the fuel cell unit is reduced. In addition, in order to prevent the stagnant liquid region from occurring in the first reaction cavity 106 and the second reaction cavity 107 and the reaction by-product accumulation from occurring, two electrolyte interfaces 102 are provided in the embodiment, and are respectively disposed at the bottom of the cell frame, so as to facilitate the outflow of the reaction by-product in the first reaction cavity 106 and the second reaction cavity 107.

The negative electrode plates 105 of the fuel cell unit need to be replaced after a period of use, and the negative electrode plates 105 need high electric and thermal conductivity as a lead-out means of the negative electrode current, and the top of the cell frame 101 is provided with an opening for the negative electrode plates 105 to be inserted into the cell frame 101 in this embodiment. Referring to fig. 7, fig. 7 is a front view of a negative plate according to an embodiment, the negative plate 105 includes a reaction portion 1051 and a negative conductive portion 1052, the reaction portion 1051 is disposed inside a cell frame to chemically react with an electrolyte, that is, two surfaces of the reaction portion 1051 of the negative plate 105 and two membrane electrodes form a first reaction cavity 106 and a second reaction cavity 107, respectively, the front surface of the reaction portion 1051 is a rectangular surface, and a side surface of the reaction portion 1051 is a tapered surface, which facilitates outflow of a residual electrolyte. The negative conductive part 1052 is disposed on the top of the battery frame 101 for conducting the negative current. Referring to fig. 8, fig. 8 is a side view of the negative plate according to an embodiment, wherein the two surfaces of the negative conductive portion 1052 are respectively provided with a groove 10521, and the cross section of the groove 10521 is arc-shaped, so as to increase the contact area between the negative conductive portion and facilitate the insertion and extraction of the negative plate 105. In addition, a sealing portion 10522 is provided at a position of the negative electrode conductive portion 1052 corresponding to the opening of the cell frame 101 to enhance the sealing of the first reaction cavity 106 and the second reaction cavity 107, and a rubber sealing ring may be used as the sealing portion 10522. The negative electrode plate 105 in this embodiment is formed by integral press molding, which facilitates mass production.

The fuel cell unit 10 further includes a positive electrode conductive portion 109, the positive electrode conductive portion 109 is provided on the cell frame 101 and electrically connected to the membrane electrode 104, and the positive electrode conductive portion 109 is configured to derive a positive electrode current. The two positive electrode conductive portions 109 in this embodiment are electrically connected to the two membrane electrodes 104, respectively.

Since a large amount of heat is generated during the chemical reaction in the fuel cell unit 10, the air inlet/outlet 60 is provided at the side of the case 20 in this embodiment, and as shown in fig. 2, the air inlet/outlet 60 is provided with a plurality of blades arranged at equal intervals. In this embodiment, the air inlet/outlet 60 is formed on both opposite sides of the housing 20, and the cross section of the blade is tapered. The air entering and exiting through the air inlet/outlet port 60 forms an air flow that can carry away heat generated by the chemical reaction of the fuel cell unit 10.

As shown in fig. 9, the gas interface module 50 further includes a gas channel concentrator 502, and the gas channel concentrator 502 includes a gas buffer cavity 5021 and at least two unit gas pipes 5022.

Wherein, the at least two unit gas pipes 5022 and the gas interfaces 501 are arranged on the same surface of the gas buffer cavity 5021. In this embodiment, the gas buffer cavity is a rectangular sealed cavity, and the unit gas pipe 5022 is connected to the gas outlet of the fuel cell unit 10 to exhaust the gas generated by the chemical reaction in the fuel cell unit 10. Since each fuel cell unit 10 is provided with two exhaust ports, the number of unit gas pipes 5022 is twice the number of fuel cell units 10 in the metal fuel cell stack. The number of gas interfaces 501 in each gas interface module 50 is two. The unit gas pipes 5022 are arranged on the surface of the gas buffer cavity 5021 along the extending direction of the gas buffer cavity 5021, and the two gas interfaces 501 are respectively arranged on the surfaces of the gas buffer cavities 5021 on the two sides of the at least two unit gas pipes 5022. In this embodiment, the metal fuel cell stack includes 24 fuel cell units, so 48 unit gas pipes are required for exhausting gas, two gas interface modules 50 are provided in this embodiment, and 24 unit gas pipes and 2 gas interfaces are arranged on the gas buffer cavity 5021 in each gas interface module 50. In this way, the unit gas pipes collectively collect the reaction gas in the plurality of fuel cell units into the gas buffer cavity 5021 and then collectively discharge the reaction gas from the gas ports 501 to the outside of the housing 20, simplifying the number of gas ports and the installation procedure.

As shown in fig. 10, the fluid path interface module 30 further includes a fluid path branching portion 302, the fluid path branching portion 302 includes a branching substrate 3021, a cavity 3022 is disposed in the branching substrate 3021, a branching inlet 3023 connected to the fluid path interface 301 is disposed at a bottom end of the cavity 3022, a plurality of unit flow channels 3024 are disposed at an equal interval on a top surface of the branching substrate 3021, at least two fan-shaped regions having the same center of circle are formed on the top surface of the branching substrate 3021 by the plurality of unit flow channels 3024, and a lower arc edge of the fan-shaped region is connected to a top edge of the cavity 3022. Each cell flow channel 3024 is used to input electrolyte into the fuel cell. After being input from the liquid path interface 301, the electrolyte enters the cavity 3022 through the shunt interface 3023, and then is shunted to each fuel cell 10 through each unit flow channel 3024 to perform a chemical reaction, in order to ensure that the flow rates of the electrolyte flowing into each fuel cell 10 are the same, the shapes and the sizes of the unit flow channels 3024 are completely the same, and the distances from the electrolyte inlets corresponding to each fuel cell 10 in the metal fuel cell stack to the circle center of the fan-shaped area are the same.

Also, each fuel cell unit 10 is provided with two electrolyte inlets, and thus each fuel cell unit 10 corresponds to two unit flow channels, that is, the number of unit flow channels is twice the number of fuel cell units in the metal fuel cell stack. The flow dividing base in this embodiment is in the shape of a cube, the cavity is in the shape of a cylinder, and the number of the fuel cell units 10 is 24, so that two liquid path interface units 30 are required, each having 24 unit flow passages 3024 therein, and each 12 unit flow passages 3024 forming a sector area.

Referring to fig. 11, the circuit interface module 40 further includes a plurality of series conductive parts 402 arranged at equal intervals, each series conductive part 402 includes a conductive bracket 4022, the conductive bracket 4022 includes a first side surface, a second side surface and a first bottom surface 4025, the first side surface is opposite to the second side surface, the first side surface is provided with a first groove 4023 and a first reed 4024 at an interval, the second side surface is provided with a second groove 4025 and a second reed 4026 at an interval, the second reed 4026 corresponds to the first groove 4023, and the first reed 4024 corresponds to the second groove 4025. As shown in fig. 12, each of the series conductive parts is provided on the top of two adjacent fuel cell units, and the first spring 4024 is connected to the positive conductive part 109, and the second spring 4026 is connected to the negative conductive part 1052. Two ends of the conductive support 4022 are respectively provided with a limiting mechanism 4027 for fixing the conductive support 4022. The number of the series conductive sections 402 is one more than the number of the fuel cell units 10 in the metal fuel cell stack; two serial conductive parts on two sides of the serial conductive parts arranged at equal intervals are electrically connected with the circuit interface, and are used for serially connecting the positive conductive parts and the negative conductive parts of different fuel cell units to form a serial circuit, and currents generated by the plurality of fuel cell units are serially led out to the circuit interface. In addition, the positive electrode conductive part or the negative electrode conductive part of two fuel battery units on two sides of at least two fuel battery units is not connected with the series conductive part, and is directly and electrically connected with the circuit interface. In this embodiment, the circuit interface 401 includes a negative electrode circuit interface into which a negative electrode current derived from the negative electrode conductive part of the fuel cell unit 10 is merged, and a positive electrode circuit interface into which a positive electrode current derived from the positive electrode conductive part of the fuel cell unit 10 is merged.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A metal fuel cell stack, comprising: the fuel cell system comprises a shell, at least two fuel cell units, a gas interface module, a circuit interface module and a liquid circuit interface module;

2. The metal fuel cell stack according to claim 1, wherein at least two of said fuel cell units are arranged in an equally spaced manner in a receiving cavity of said casing;

3. The metal fuel cell stack according to claim 2, wherein the fuel cell unit further comprises a cell frame, two membrane electrodes, and a negative plate sandwiched between the two membrane electrode assemblies;

4. The metal fuel cell stack of claim 3, wherein the top of the cell frame is provided with an opening for insertion of the negative plate into the cell frame;

5. The metal fuel cell stack of claim 2 wherein said gas interface module further comprises a gas channel concentrator, said gas channel concentrator comprising a gas buffer cavity and at least two cell gas tubes;

6. The metal fuel cell stack of claim 2, wherein the liquid path interface module further comprises a liquid path flow dividing portion, the liquid path flow dividing portion comprises a flow dividing base body, a cavity is arranged in the flow dividing base body, a flow dividing inlet connected with the liquid path interface is arranged at the bottom end of the cavity, a plurality of unit flow channels are arranged on the top surface of the flow dividing base body at equal intervals, at least two fan-shaped areas with the same center of circle are formed on the top surface of the flow dividing base body by the unit flow channels, and the lower arc edge of each fan-shaped area is connected with the top edge of the cavity;

each cell flow channel is used to input electrolyte into the fuel cell unit.

7. The metal fuel cell stack of claim 2 wherein said circuit interface module further comprises a plurality of series electrically conductive portions arranged at equal intervals, each of said series electrically conductive portions being disposed on top of two adjacent fuel cell units;

8. The metal fuel cell stack of any of claims 1-7, wherein said circuit interface comprises a positive electrode circuit interface and a negative electrode circuit interface;

9. The metal fuel cell stack of any one of claims 1 to 7, wherein the side of the casing is provided with an air inlet/outlet port, and the air inlet/outlet port is provided with a plurality of equally spaced blades.

10. The metal fuel cell stack of claim 9 wherein said vanes are tapered in cross-sectional shape.