Sealed mounting structure of the positive electrode of a metal-air battery single cell

Abstract

The present invention discloses a sealing and mounting structure for the positive electrode of a metal-air battery monomer, which includes a ventilation plate, a positive electrode, a positive electrode sealing ring, a monomer frame, a hot melt column, and a positioning hole. The ventilation plate presses the positive electrode and the positive electrode sealing ring onto the monomer frame outside the reaction window. The positive electrode sealing ring is embedded in the positive electrode sealing groove. The hot melt column is arranged along the outer periphery of the positive electrode sealing groove or the reaction window. The positioning hole is opened on the ventilation plate, the positive electrode, and the positive electrode sealing ring. The hot melt column passes through the positioning holes on the positive electrode sealing ring, the positive electrode, and the ventilation plate, and the hot melt column is thermally expanded into a hot melt head outside the ventilation plate to seal and fix the ventilation plate, the positive electrode, and the positive electrode sealing ring to the monomer frame. The present invention solves the problems of cumbersome operation and unreliable sealing in the sealing and mounting of the positive electrode. Moreover, this sealing and mounting method is simple and reliable, has high positive electrode assembly efficiency, uniform pressure on the positive electrode pressure surface, good product consistency, does not cause damage to the positive electrode material, and is more suitable for mass production and environmental protection classification and recycling.

Description

Technical Field

[0001] The present invention relates to the technical field of metal-air batteries, and particularly to a sealing and installation structure for the positive electrode of a single metal-air battery. Background Art

[0002] A single metal-air battery is a chemical power source that uses oxygen in the air as the positive electrode active material, a metal as the negative electrode active material, and a conductive solution as the electrolyte. It generates electrical energy through a discharge reaction under the catalysis of a positive electrode catalyst.

[0003] In the structure of metal-air batteries, the sealing problem of the positive electrode has always been a breakthrough difficulty for such batteries. The commonly used method at present is the adhesive structure, which has the following problems: 1. In the main structure, the deformation coefficients of several materials such as plastic, adhesive, and air positive electrode are different at different temperatures, and there will be a large temperature difference during the operation of the metal-air battery, which will cause the adhesive to displace and come off when the temperature changes, resulting in sealing failure; 2. The glue-sealing method is cumbersome to operate. After bonding, it is necessary to press and hold for a period of time to ensure complete bonding between the positive electrode and the single body frame. The production efficiency is low and the bonding consistency cannot be guaranteed. Once the bonding is incomplete, it will cause leakage of the electrolyte, which is difficult to repair. Disassembly will damage the positive electrode, resulting in the positive electrode being damaged and unable to be used again; 3. Using an adhesive on the catalytic surface of the positive electrode makes this part of the positive electrode denatured and hard, forming a hard-soft interface line at its junction. After working for a period of time, due to the low-frequency oscillation brought by the flow of the electrolyte with the positive electrode, the positive electrode cracks and leaks liquid at this hard-soft interface line; 4. The glue has poor alkali and temperature resistance, is easy to age, and has a short service life. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a sealing and installation structure for the positive electrode of a single metal-air battery, so as to solve the technical problems of cumbersome operation, low efficiency, and unreliable sealing of the positive electrode in the prior art. At the same time, with the cooperation of a standardized production jig, the semi-automatic production line installation of the positive electrode of the battery single body is realized.

[0005] To achieve the above object, an embodiment of the present invention provides a positive electrode sealing and mounting structure for a metal-air battery monomer. The metal-air battery monomer includes a monomer frame and a positive electrode. The monomer frame includes a reaction window provided on the side. It is characterized in that a positive electrode sealing groove is provided on the monomer frame outside the periphery of the reaction window, and a plurality of raised hot-melt columns are provided on the monomer frame along the outer periphery of the positive electrode sealing groove. The positive electrode sealing and mounting structure includes a ventilation plate, a positive electrode, and a positive electrode sealing ring. The ventilation plate presses the positive electrode and the positive electrode sealing ring against the monomer frame outside the reaction window. The positive electrode sealing ring is embedded in the positive electrode sealing groove. The ventilation plate, the positive electrode, and the positive electrode sealing ring are provided with positioning holes corresponding one by one to the hot-melt columns. The head of the hot-melt column passes through the positioning holes on the ventilation plate, the positive electrode, and the positive electrode sealing ring, and is thermally expanded into a hot-melt head outside the ventilation plate. The hot-melt head presses and limits the ventilation plate, the positive electrode, and the positive electrode sealing ring on the monomer frame.

[0006] Further, a plurality of ventilation windows are provided in the area of the ventilation plate corresponding to the reaction window.

[0007] Further, the inner surface of the ventilation plate in contact with the positive electrode is a smooth plane, and a plurality of ventilation grooves are provided on the outer surface of the ventilation plate away from the positive electrode. The ventilation grooves are communicated with the ventilation windows.

[0008] Further, a positive electrode current collector lead-out flange is provided on the side of the positive electrode. When the ventilation plate presses the positive electrode against the monomer frame outside the reaction window, the positive electrode current collector lead-out flange extends to the front and rear end faces of the monomer frame.

[0009] Further, a plurality of equally spaced lead-out flange fixing holes are provided on the positive electrode current collector lead-out flange.

[0010] Further, the positive electrode current collector lead-out flange is an extension of a metal mesh or a metal plate of the positive electrode current collector.

[0011] In the positive electrode sealing and mounting structure of the metal-air battery monomer of the present invention, the positioning holes on the positive electrode sealing ring are located outside the area embedded in the positive electrode sealing groove, and the hole diameter is smaller than the outer diameter of the hot-melt column.

[0012] In the positive electrode sealing and mounting structure of the metal-air battery monomer of the present invention, the hot-melt column is a columnar structure with an equal cross-section integrally injection-molded with the monomer frame.

[0013] In the positive electrode sealing and mounting structure of the metal-air battery monomer of the present invention, the ventilation plate and the monomer frame are made of the same material, and their deformations generated when the battery heats up are the same, avoiding sealing failure caused by different deformations of different materials when the battery heats up.

[0014] In the positive electrode sealing and mounting structure of the metal-air battery single cell of the present invention, reaction windows are symmetrically arranged on both side faces of the single cell frame, and hot melt columns are symmetrically arranged around the reaction windows on both side faces of the single cell frame. Two groups of the ventilation plates, the positive electrode sealing rings and the positive electrodes are symmetrically mounted at the reaction windows on both side faces of the single cell frame.

[0015] In the present invention, after the positive electrode is covered on the outer side face of the reaction window of the single cell frame, the ventilation plate is then covered. The positive electrode and the ventilation plate are both provided with positioning holes corresponding to the hot melt columns on the single cell frame. After all the positioning holes and the hot melt columns on the positive electrode and the ventilation plate are aligned one by one, the ventilation plate and the positive electrode are pressed tightly, and then all the ends of the hot melt columns are hot melted by a hot melting device at one time to form an inverted hot melt head. After the hot melt head expands, its size exceeds the diameter of the positioning hole on the ventilation plate, forming a limit on the ventilation plate. In this way, the positive electrode is pressed tightly and fixed, and the reaction window on the single cell frame is sealed. The entire sealing structure realizes the pressing of the positive electrode through the limit of the hot melt head, and realizes the positive electrode sealing by using an extrusion sealing ring. No adhesive structure is adopted, avoiding vibration cracking caused by hardening of the adhesive, having a longer sealing life, and the positive electrode can be disassembled without damage and reused, reducing the battery maintenance cost.

[0016] The ventilation plate and the main body of the present invention are made of the same material. After the ventilation plate, the positive electrode, the positive electrode sealing ring and the single cell frame are riveted into one body by a hot melt structure, it effectively solves the influence of inconsistent material deformation caused by the change of the battery heating temperature on the sealing structure. The front and rear ventilation plates on both sides of the single cell frame adopt a symmetrical structure for pressing and matching, so that the pressures on the adjacent positive electrode surfaces on the two side faces of the single cell frame are the same and in opposite directions, thus offsetting each other the pressure difference brought by the height difference of the electrolyte in the vertical plane in the reaction cavity inside the single cell frame, effectively solving the leakage problem caused by the deformation of the positive electrode from the source. The ventilation grooves are arranged on the ventilation plate, which not only reduces the weight of the ventilation plate, but also increases the strength of the positive electrode sealing structure through the ribs formed by the ventilation grooves, further ensuring the parallelism of all the positive electrodes after stacking and the structural consistency of the battery single cells.

[0017] Through the positive electrode sealing and mounting structure of the metal-air battery single cell provided by the embodiment of the present invention, the problems of cumbersome positive electrode sealing and mounting operation and unreliable sealing are solved. Moreover, this sealing and mounting method is simple and reliable, has a high positive electrode assembly efficiency and good consistency, and will not cause damage to the positive electrode material. After the ventilation plate, the positive electrode, the positive electrode sealing ring and the hot melt column are aligned and mounted with the cooperation of a standardized production jig, a one-time forming hot melt machine is used to form the hot melt heads of all the hot melt columns in place, which is convenient for assembly line operation, enabling the positive electrode mounting process to achieve semi-automatic operation, making the deformation amplitude of the positive electrode plane under pressure basically the same during installation, eliminating human factors, thus effectively ensuring the consistency of the production of the battery single cells, and ensuring that the positive electrode does not leak liquid.

[0018] In summary, from the perspectives of practicability and reliability, the present invention designs a positive electrode sealing and mounting structure, and its main effects are reflected in the following aspects: (1) The sealing performance of the positive electrode sealing and mounting structure is more reliable. At the same time, semi-automatic assembly production of the positive electrode of the metal-air battery monomer on an assembly line is realized, large-scale assembly line batch production can be achieved at a lower cost, and the monomer frame and the positive electrode can be separated without damage, so as to realize environmental protection classification recycling. (2) By changing the positive electrode lead connection method, the resistance of the positive electrode lead is greatly reduced, and the output capacity and service life of the positive electrode are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art.

[0020] Figure 1 It is a schematic structural diagram of a metal-air battery monomer in an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the decomposition of the positive electrode of the metal-air battery monomer in the embodiment.

[0022] Figure 3 It is a schematic structural diagram of the monomer frame in the embodiment.

[0023] Figure 4 It is a schematic structural diagram of the positive electrode in the embodiment.

[0024] Figure 5 It is a schematic structural diagram of the ventilation plate in the embodiment.

[0025] Figure 6 It is a front view after the positive electrode and the ventilation plate are installed in place in the embodiment.

[0026] Reference numerals in the drawings:

[0027] 1 - monomer frame, 100 - reaction window, 101 - insulating strip, 106 - hot melt column, 106' - hot melt head, 107 - positive electrode sealing groove,

[0028] 2 - positive electrode, 200 - positive electrode lead copper sheet, 201 - positive electrode current collector lead folding edge, 202 - sealing positioning hole, 203 - lead folding edge fixing hole, 21 - positive electrode sealing ring, 22 - ventilation plate, 221 - ventilation window, 222 - ventilation groove, 223 - ventilation plate positioning hole, 23 - side cover, 24 - nut retaining piece,

[0029] 3 - negative electrode, 300 - negative electrode lead copper sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figure 1 and Figure 2 , the metal-air battery monomer in the figure is a specific implementation structure adopting the positive electrode sealing and mounting structure of the present invention. The metal-air battery monomer in this embodiment includes a monomer frame 1, a positive electrode 2, and a negative electrode 3. Among them, the negative electrode 3 is a metal electrode that can participate in the discharge reaction of the metal-air battery, and can be an aluminum plate, a magnesium plate, or a zinc plate, and is fixedly inserted into the reaction cavity of the monomer frame 1. The negative electrode lead copper sheet 300 is the lead negative electrode connection component of the entire battery. The positive electrode 2 is fixedly installed on the reaction window 100 of the monomer frame 1, covering and shielding the reaction window 100 communicating with the reaction cavity. This embodiment only details the positive electrode sealing and mounting structure of the present invention. The electrolysis principle of the metal-air battery and the positive and negative electrode materials of the metal-air battery are all conventional technologies in the art, and this embodiment will not elaborate on them here.

[0032] Specifically, in this embodiment, the positive electrode sealing and mounting structure includes a ventilation plate, a positive electrode sealing ring, a hot melt column, and a positioning hole. Specifically, as Figure 2 shown, the positive electrode 2 of this embodiment is pressed and installed on the monomer frame outside the reaction window 100 through the ventilation plate 22, covering and shielding the reaction window 100 on the side of the reaction cavity inside the monomer frame. Reaction windows 100 directly communicating with the reaction cavity are provided on both sides of the monomer frame 1 of this embodiment. Therefore, two groups of positive electrodes 2 are symmetrically arranged on both sides of the monomer frame 1, respectively forming two groups of discharge reactions opposite to two metal negative plates fixedly inserted inside the monomer frame 1. The side of the positive electrode 2 extends to the front and rear end faces of the monomer frame 1. The front and rear end faces of the monomer frame 1 are closed by side covers 23. The side of the positive electrode 2 is pressed and fixed on the side cover 23 of the monomer frame 1 together with the nut retainer 24 and the positive electrode lead copper sheet 200. The positive electrode lead copper sheet 200 is used for positive electrode lead wiring.

[0033] Combined with reference to Figure 3 , a positive electrode sealing groove 107 is provided on the monomer frame 1 located on the outer periphery of the reaction window 100, and a positive electrode sealing ring 21 is embedded in the sealing groove 107 (as Figure 2As shown, while the positive electrode 2 is pressed against the monomer frame through the ventilation plate 22, the positive electrode sealing ring 21 is pressed into the positive electrode sealing groove 107, forming a seal between the positive electrode 2 and the reaction window 100 of the monomer frame 1 to prevent the electrolyte in the reaction cavity from leaking. The positive electrode sealing ring 21 is made of a soft rubber material that is resistant to high temperatures and alkalis, and the thickness of the positive electrode sealing ring 21 embedded in the sealing groove 107 is greater than the depth of the sealing groove 107, providing a compression margin between the positive electrode 2 and the positive electrode sealing ring 21 to ensure the sealing effectiveness of the positive electrode sealing ring 21. At the same time, a number of hot melt columns 106 are arranged in a circle along the outer periphery of the positive electrode sealing groove 107 or the reaction window 100. The hot melt columns 106 are columnar structures with the same cross-section integrally injection-molded with the monomer frame 1.

[0034] Refer to in combination Figure 4 and Figure 5 , a circle of sealing positioning holes 202 corresponding one-to-one with the hot melt columns 106 are provided on the positive electrode 2, and a circle of ventilation plate positioning holes 223 corresponding one-to-one with the hot melt columns 106 are provided on the ventilation plate 22. The sealing positioning holes 202 and the ventilation plate positioning holes 223 have the same cross-section as the hot melt columns 106 and maintain a clearance fit. When installing the positive electrode 2 and the ventilation plate 22, after all the hot melt columns 106 pass through the sealing positioning holes 202 on the positive electrode 2 and the ventilation plate positioning holes 223 on the ventilation plate 22 respectively, keep the ventilation plate 22 pressing the positive electrode 2. The end of the hot melt column 106 extends out of the ventilation plate positioning hole 223, and then the end of the hot melt column 106 is formed into a hot melt head 106' through hot melting by a hot melting device. As Figure 6 shown in, the diameter of the hot melt head 106' after hot melting exceeds the diameter of the ventilation plate positioning hole 223 on the ventilation plate 22, limiting and locking the ventilation plate 22 from the outside, and pressing and sealing the positive electrode 2 on the monomer frame 1 through the ventilation plate 22.

[0035] The hot melt columns 106 are distributed along the outer periphery of the positive electrode sealing groove 107. In addition to the main structure embedded in the positive electrode sealing groove 107, the positive electrode sealing ring 21 extends a positioning edge in a circle towards the outer periphery of the positive electrode sealing groove 107, and a circle of positioning holes corresponding one-to-one with the hot melt columns 106 are provided on this positioning edge. When assembling the positive electrode, the hot melt columns 106 also form positioning for the positive electrode sealing ring 21. The positive electrode sealing ring 21 is integrally formed by a mold using a corrosion-resistant soft plastic and has a certain elastic deformation ability. The diameter of the positioning holes on the positive electrode sealing ring 21 can be set smaller than the outer diameter of the hot melt columns, so that a certain extrusion deformation can be maintained between the sealing ring and the hot melt columns, improving the positioning and sealing effect of the sealing ring.

[0036] Refer to again Figure 3, several parallel insulating strips 101 are also provided in the reaction window 100 of the monomer frame 1. The insulating strips 101 separate the positive electrode from the negative electrode inside the battery. The insulating strips 101 divide the reaction window 100, support the positive electrode 2, and prevent the positive electrode 2 from coming into contact with the negative electrode due to deformation caused by the excessive area of the reaction window 100, thus avoiding short circuit.

[0037] Refer to again Figure 4 , on one side of the positive electrode 2, a positive electrode (current collector) lead-out folded edge 201 extends to the front and rear end faces of the monomer frame 1. A row of lead-out folded edge fixing holes 203 is provided on the positive electrode current collector lead-out folded edge 201. By extending the positive electrode current collector lead-out folded edge 201 to the end face of the monomer frame 1 and passing screws and nuts through the positive electrode current collector lead-out folded edge fixing holes 203, the positive electrode current collector lead-out folded edge 201 and the positive electrode lead-out copper sheet 200 are pressed and contacted. The wiring end of the positive electrode lead-out copper sheet 200 is led out to the top of the monomer frame for battery wire arrangement, realizing the electrical energy output of the positive electrode. The positive electrode current collector lead-out folded edge 201 is an extension part of the metal mesh or metal plate of the positive electrode current collector. The extension part of the metal mesh or metal plate serves as the positive electrode current collector lead-out folded edge 201 to connect the positive electrode 2 and the positive electrode lead-out copper sheet 200. The contact area between the metal mesh or metal plate on both sides of the positive electrode and the positive electrode lead-out copper sheet 200 is large, and they are pressed and connected to the end face of the monomer frame 1 with multiple screws, making its connection resistance reach 40×10 -6 Ohm (micro-ohm level), with a large current-carrying capacity, solving the problem of heat loss of copper connectors during 100A high-current discharge. After being bent, the positive electrode lead-out copper sheet 200 can extend to the top two sides of the next battery monomer arranged in a stacked manner to connect with the negative electrode lead-out copper sheet 300, realizing the wire arrangement of the stack composed of multiple battery monomers. The structure is simple and reliable. The sealing assembly of the positive electrode 2 and the ventilation plate 22 is completed by one-time hot melting of the hot melting columns through a hot melting device. The sealing of the positive electrode 2 is achieved through a complete positive electrode sealing ring 21, which is easy to operate and can be mass-produced through a jig.

[0038] In this embodiment, the ventilation plate 22 not only serves as a pressing component to press and fix the positive electrode 2 on the monomer frame 1, but also serves as a ventilation component for ventilating the positive electrode 2. Refer to again Figure 5, the ventilation plate 22 is the same as the positive electrode plane except for the folded edge of the positive electrode current collector lead-out, so that the positive electrode 2 can be firmly pressed on the monomer frame 1. The inner surface of the ventilation plate 22 that is in close contact with the positive electrode 2 is a smooth plane to ensure that the surface of the positive electrode 2 is flattened. A ventilation window 221 is provided in the area of the ventilation plate 22 corresponding to the reaction window 100. In order to prevent the positive electrode from bulging and deforming outward due to the excessive vacant area of the ventilation window 221, the ventilation window 221 is divided into several parts by a number of rib structures. External oxygen or air contacts the positive electrode through the ventilation window 221 on the ventilation plate 22 and penetrates through the positive electrode into the reaction window 100 to provide the oxygen required for the discharge reaction. Since most of the battery monomers are cascaded and stacked to increase the voltage and discharge capacity, in this embodiment, a number of ventilation grooves 222 communicating with the ventilation window 221 are provided on the outer surface of the ventilation plate 22 away from the positive electrode. One end of the ventilation groove 222 is finally communicated with the ventilation window 221, and the other end penetrates through the outer edge of the ventilation plate 22 to be docked with the intake or exhaust channel of the battery system. The ventilation grooves 222 can be arranged as the semi-circular grooves arranged in a criss-cross pattern on the outer surface of the ventilation plate 22 as shown in Figure 5 , or other forms can be arranged according to the setting mode of the ventilation channel of the battery. The air or oxygen can be supplied through the ventilation grooves 222 between the monomer frames of multiple groups of stacked batteries.

[0039] In the embodiment of the present invention, the sealed installation between the monomer frame and the positive electrode of the metal-air battery monomer is realized. A number of protruding hot-melt columns are provided on the outer periphery of the reaction window of the monomer frame. The hot-melt columns are integrally formed with the monomer frame, and a positive electrode sealing groove is provided at the edge of the reaction window. A positive electrode sealing ring is installed in the positive electrode sealing groove, and the positive electrode is installed on the outer side surface of the positive electrode sealing ring and then the ventilation plate is installed. Both the positive electrode and the ventilation plate are provided with positioning hole positions corresponding to the hot-melt columns on the monomer frame. After aligning all the positioning hole positions and hot-melt columns on the positive electrode and the ventilation plate one by one, the ventilation plate and the positive electrode are pressed tightly, and then the ends of all the hot-melt columns are melted by a hot-melt device at one time to form an inverted hot-melt head. The size of the hot-melt head exceeds the diameter of the positioning hole position on the ventilation plate after expansion, forming a limit on the ventilation plate. In this way, the positive electrode is pressed tightly and fixed, and the reaction window on the monomer frame is sealed.

[0040] In summary, the positive electrode sealed installation structure of the metal-air battery monomer provided by the embodiment of the present invention solves the problems of cumbersome operation and unreliable sealing in the sealed installation of the positive electrode. This sealed installation method is simple and reliable, has high positive electrode assembly efficiency and good consistency, and will not cause damage to the positive electrode material. With the cooperation of standardized production jigs, the semi-automatic assembly line production of the positive electrode is realized, and large-scale production in batches can be achieved at a lower cost. The monomer frame and the positive electrode can also be completely separated, so as to realize environmental protection classification and recycling. By changing the positive electrode lead-out connection method, the resistance of the positive electrode lead-out pole is greatly reduced, and the output capacity and service life of the positive electrode are improved.

[0041] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. Sealing and installation structure of the positive electrode of a metal-air battery single cell. The metal-air battery single cell includes a single cell frame and a positive electrode. The single cell frame includes a reaction window provided on the side, and is characterized in that, A positive electrode sealing groove is provided on the monomer frame outside the reaction window. A number of raised hot melt columns are provided on the monomer frame along the outer periphery of the positive electrode sealing groove. The positive electrode sealing installation structure includes a ventilation plate, a positive electrode, and a positive electrode sealing ring. The ventilation plate presses the positive electrode and the positive electrode sealing ring onto the monomer frame outside the reaction window. The positive electrode sealing ring is embedded in the positive electrode sealing groove. The ventilation plate, the positive electrode, and the positive electrode sealing ring are provided with positioning holes corresponding to the hot melt columns one by one. The head of the hot melt column passes through the positioning holes on the ventilation plate, the positive electrode, and the positive electrode sealing ring, and expands into a hot melt head by hot melting outside the ventilation plate. The hot melt head presses and limits the ventilation plate, the positive electrode, and the positive electrode sealing ring onto the monomer frame. A number of parallel insulating strips are also provided on the reaction window of the monomer frame, and the insulating strips separate the positive electrode from the negative electrode inside the battery.

2. The metal-air battery single cell positive electrode sealing and mounting structure according to claim 1, wherein A number of ventilation windows are provided in the area of the ventilation plate corresponding to the reaction window.

3. The positive electrode sealing and mounting structure of the metal-air battery monomer according to claim 2, characterized in that The inner surface of the ventilation plate in contact with the positive electrode is a smooth plane. A number of ventilation grooves are provided on the outer surface of the ventilation plate away from the positive electrode, and the ventilation grooves are vertically and horizontally connected to the ventilation windows.

4. The metal-air battery single cell positive electrode sealing and mounting structure according to claim 2, characterized in that, A positive electrode current collector lead-out flange is provided on the side of the positive electrode. When the ventilation plate presses the positive electrode onto the monomer frame outside the reaction window, the positive electrode current collector lead-out flange extends to the front and rear end faces of the monomer frame.

5. The metal-air battery single cell positive electrode sealing and mounting structure according to claim 4, characterized in that, A number of equally spaced lead-out flange fixing holes are provided on the positive electrode current collector lead-out flange.

6. The metal-air battery single cell positive electrode sealing and mounting structure according to claim 4, characterized in that The positive electrode current collector lead-out flange is an extension part of the metal mesh or metal plate of the positive electrode current collector.

7. The metal-air battery single cell positive electrode sealing and mounting structure according to any one of claims 1 to 6, characterized in that, The positive electrode sealing ring is made of a soft rubber material resistant to high temperature and alkali. The positioning hole on it is located outside the area embedded in the positive electrode sealing groove, and the hole diameter is smaller than the outer diameter of the hot melt column.

8. The positive electrode sealing and mounting structure of the metal-air battery monomer according to any one of claims 1 to 6, characterized in that, The hot melt column is a columnar structure with an equal cross-section integrally injection-molded with the monomer frame.

9. The metal-air battery single cell positive electrode sealing and mounting structure according to any one of claims 1 to 6, characterized in that The ventilation plate and the monomer frame are made of the same material.

10. The positive electrode sealing and mounting structure of the metal-air battery monomer according to any one of claims 1 to 6, characterized in that Reaction windows are symmetrically provided on both sides of the monomer frame. Hot melt columns are symmetrically provided around the reaction windows on both sides of the monomer frame. Two groups of the ventilation plates, the positive electrode sealing rings, and the positive electrodes are symmetrically installed at the reaction windows on both sides of the monomer frame.

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