Cylindrical aluminum air cell structure

Abstract

The cylindrical aluminum air cell structure relates to the technical field of aluminum air cell, and particularly relates to a cylindrical aluminum air cell structure. The inner core of the present application is a hollow cylindrical structure; the outer part of the inner core is coated with an aluminum electrode to form a cylindrical structure; the fastening cover is a circular ring structure, and a through hole (9) penetrating the upper and lower surfaces is arranged on the upper part of the fastening cover for the inflow and outflow of electrolyte; the outer part of the aluminum electrode is provided with one fastening cover above and below; the air electrode is coated on the outer part of the fastening cover to form a cylindrical structure; the outer part of the air electrode is provided with one pipe clamp above and below, and the installation positions of the two pipe clamps correspond to the upper and lower fastening covers one by one, so that the air electrode, the fastening cover and the aluminum electrode are fastened on the outer part of the inner core. The technical scheme of the present application solves the problems of the grid type structure aluminum air cell in the prior art, such as complex electrolyte supply and sealing structure, large volume, large weight and the like.

Description

TECHNICAL FIELD

[0001] The cylindrical aluminum air battery structure relates to the technical field of aluminum air battery, and particularly relates to a cylindrical aluminum air battery structure. BACKGROUND

[0002] The theoretical specific energy of the aluminum air battery can reach 8100 Wh / kg, has the characteristics of low cost, high specific energy and safety, and has great commercial potential in military, civilian and portable power supply and the like. The existing aluminum air battery is basically of square structure, generally adopts a grid structure to fix the aluminum plate and the air electrode respectively, has the advantage of convenient replacement of the aluminum electrode, but the increased accessories also bring the increase of the weight of the battery, the complexity of electrolyte supply and sealing, and the planar spreading structure form of the aluminum air battery electrode, the accessory grid and the two-stage spacing, which inevitably brings the increase of the thickness of the battery, and finally leads to the increase of the volume of the battery stack.

[0003] In view of the problems existing in the prior art, it is necessary to research and design a new type of cylindrical aluminum air battery structure to overcome the problems existing in the prior art. SUMMARY

[0004] According to the grid type structure aluminum air battery of the prior art, the electrolyte supply and sealing structure is complex, large in volume and heavy in weight, and the cylindrical aluminum air battery structure is provided. The square grid structure is changed into a cylindrical structure, so that the volume of the aluminum air battery is reduced, the compactness of the structure of the aluminum air battery is improved, and the purpose of reducing the weight of the battery is achieved.

[0005] According to the following calculation, the electrode area is s, the thickness of the battery is x, for a square battery, the volume V=sx, if the square battery is designed as a cylindrical battery with the bottom diameter equal to the height, under the condition that the electrode area s is the same, then the volume V0 of the cylindrical battery is 2π(s / 4π) 1.5 , the volume ratio V / V0 of the square battery and the cylindrical battery is 7.088x / s 0.5 If the electrode area of the square battery is 10 cm 2 , the thickness of the battery is only more than 0.45 cm, and the volume of the square battery will be greater than that of the cylindrical battery; the electrode area of the square battery is 100 cm 2 , the thickness of the battery is only more than 1.41 cm, and the volume of the square battery will be greater than that of the cylindrical battery; by analogy, the electrode area of the square battery is 200 cm 2 , the thickness of the battery is greater than 2 cm, and the volume of the square battery will be greater than that of the cylindrical battery; the electrode area of the square battery is 500 cm 2If the battery thickness is greater than 3.15 cm, the volume of the square battery will be greater than that of the cylindrical battery. The above data show that the thickness of the square battery cannot be reduced due to the lateral spreading of the electrode surface, and it is necessary to change the square aluminum air battery into a cylindrical aluminum air battery, which will greatly reduce the size of the battery and bring the compactness of the stack structure.

[0006] The core problem of the cylindrical aluminum air battery design is to solve the position of the air electrode and the aluminum electrode in the cylindrical battery, the air supply of the air electrode and the sealing of the battery.

[0007] The technical means adopted by the present application are as follows:

[0008] A cylindrical aluminum air battery structure comprises an inner core, an aluminum electrode, a fastening cover, an air electrode and a pipe clamp;

[0009] Further, the inner core is a hollow cylindrical structure;

[0010] Further, the outer part of the inner core is covered with the aluminum electrode to form a cylindrical structure;

[0011] Further, the fastening cover is a circular ring structure, and a through hole is provided on the upper and lower surfaces of the fastening cover for the inflow and outflow of the electrolyte;

[0012] Further, the outer part of the aluminum electrode is provided with an upper fastening cover and a lower fastening cover; the top end surface of the upper fastening cover is kept in the same plane as the top end surface of the inner core, and the bottom end surface of the lower fastening cover is kept in the same plane as the bottom end surface of the inner core;

[0013] Further, the air electrode is wrapped outside the fastening cover to form a cylindrical structure;

[0014] Further, the outer part of the air electrode is provided with an upper pipe clamp and a lower pipe clamp, and the installation positions of the two pipe clamps correspond to the upper and lower fastening covers respectively, so as to fasten the air electrode, the fastening cover and the aluminum electrode outside the inner core.

[0015] Further, an annular groove is arranged on the outer wall of the inner core;

[0016] Further, a sealing gasket is placed in the groove to seal the outer wall of the inner core and the inner wall of the aluminum electrode, so as to prevent the electrolyte from leaking along the outer wall of the inner core.

[0017] Further, an annular groove is arranged on the inner and outer side walls of the fastening cover;

[0018] Further, a sealing gasket is placed in the groove;

[0019] Further, the sealing gasket assembled in the fastening cover seals the outer wall of the aluminum electrode and the inner wall of the fastening cover, so as to prevent the electrolyte from leaking along the outer wall of the aluminum electrode.

[0020] Further, the sealing gasket assembled outside the fastening cover seals between the outer wall of the fastening cover and the inner wall of the air electrode, preventing the electrolyte from leaking along the inner wall of the air electrode.

[0021] Further, the upper edge of the aluminum electrode is higher than the top end surface of the inner core, for collecting current.

[0022] Further, the upper edge of the air electrode is higher than the top end surface of the inner core, for collecting current.

[0023] Further, the aluminum electrode and the air electrode, which are higher than the top end surface of the inner core, form two current collectors of the negative and positive electrodes of the battery, for series and parallel connection between different single batteries, forming a stack.

[0024] Further, between the aluminum electrode and the air electrode, a cavity for electrolyte flow is formed by the fastening cover and the sealing gasket.

[0025] Further, the air electrode is composed of three layers, from outside to inside, a hydrophobic gas diffusion layer, a nickel mesh, and a catalyst layer, forming a compact layered structure, which is supported by the nickel mesh and can prevent the electrolyte from penetrating.

[0026] Further, the through hole on the fastening cover on the upper part of the inner core is arranged at an angle of 180 degrees with the through hole on the fastening cover on the lower part.

[0027] Further, the circular fastening cover with electrolyte channels and the outer tube clamp fix and separate the aluminum electrode and the air electrode, forming an annular cavity for electrolyte circulation, and the sealing rings solve the possible leakage of electrolyte on the outer surface of the inner core, the outer surface of the aluminum plate (outside the annular cavity), and the inner surface of the air electrode (outside the annular cavity). The aluminum plate and the nickel mesh, which are higher than the top surface of the cylindrical battery, form two current collectors of the negative and positive electrodes of the battery, for series and parallel connection between different single batteries, forming a stack.

[0028] Further, the lower part of the inner core can also be integrally processed with a fastening ring platform, which has the same function as the fastening cover.

[0029] Further, a groove is processed on the outer wall of the inner core near the position close to the fastening ring platform, for assembling a sealing gasket.

[0030] Further, a groove is processed on the upper end surface of the fastening ring platform near the position close to the outer wall of the inner core, for assembling a sealing gasket.

[0031] Further, the outer part of the inner core is covered by the aluminum electrode, the bottom end of which is inserted into the groove on the upper end of the fastening ring platform and located inside the sealing gasket in the groove.

[0032] Further, the sealing gasket assembled on the lower part of the inner core and the sealing gasket assembled on the upper end surface of the fastening ring table jointly clamp and seal the aluminum electrode;

[0033] Further, a groove is machined on the outer side wall of the fastening ring table for assembling a sealing gasket, which seals between the outer wall of the fastening cover and the inner wall of the air electrode, so as to prevent the electrolyte from leaking along the inner wall of the air electrode;

[0034] Further, a through hole is arranged on the fastening ring table penetrating the upper and lower surfaces for inflow and outflow of the electrolyte.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] 1. The cylindrical aluminum air battery structure provided by the present application designs the traditional square aluminum air battery as a cylindrical aluminum air battery, which makes it possible to minimize the volume of the aluminum air single battery and the battery stack, and improves the applicability of the aluminum air battery in different occasions;

[0037] 2. The cylindrical aluminum air battery structure provided by the present application removes the grid and other accessories of the square aluminum air battery, thereby establishing a structural basis for weight reduction of the aluminum air battery;

[0038] 3. The cylindrical aluminum air battery structure provided by the present application flows the electrolyte in the annular cylindrical cavity from bottom to top, and the flow condition of the electrolyte is superior to that of the square aluminum air battery;

[0039] 4. The cylindrical aluminum air battery structure provided by the present application exposes the outer side surface of the cylindrical aluminum air battery, which is the air electrode, directly to the air, thereby maximizing the air diffusion mass transfer, and the air electrode itself prevents the electrolyte from penetrating;

[0040] 5. The cylindrical aluminum air battery structure provided by the present application seals the annular electrolyte cavity of the cylindrical aluminum air battery by using the air electrode and the aluminum electrode itself, the annular gasket, the circular ring-shaped fastening cover, and the pipe clamp, thereby avoiding the problem of glue sealing existing in the square aluminum air battery;

[0041] 6. The cylindrical aluminum air battery structure provided by the present application is disassembled into components including two electrodes, a pipe clamp, a circular ring-shaped upper and lower fastening cover, an inner core, and an annular gasket, which is easy to disassemble and easy to assemble the battery.

[0042] In summary, the technical scheme of the present application solves the problems of the grid type structure aluminum air battery in the prior art, such as complex electrolyte supply and sealing structure, large volume, and heavy weight. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0044] Figure 1 Structure schematic diagram of the embodiment 1 of the present application;

[0045] Figure 2 Top view of the embodiment 1 of the present application;

[0046] Figure 3 Structure schematic diagram of the inner core of the embodiment 1 of the present application;

[0047] Figure 4 Top view of the inner core of the embodiment 1 of the present application;

[0048] Figure 5 Structure schematic diagram of the inner core assembling sealing gasket of the embodiment 1 of the present application;

[0049] Figure 6 Structure schematic diagram of the aluminum electrode of the present application;

[0050] Figure 7 Top view of the aluminum electrode of the present application;

[0051] Figure 8 Structure schematic diagram of the fastening cover of the present application;

[0052] Figure 9 Top view of the fastening cover of the present application;

[0053] Figure 10 Structure schematic diagram of the fastening cover assembling sealing gasket of the present application;

[0054] Figure 11 Structure schematic diagram of the air electrode of the present application;

[0055] Figure 12 Top view of the air electrode of the present application;

[0056] Figure 13 Structure schematic diagram of the pipe clamp of the present application;

[0057] Figure 14 Top view of the pipe clamp of the present application;

[0058] Figure 15 Structure schematic diagram of the embodiment 2 of the present application;

[0059] Figure 16 Top view of the embodiment 2 of the present application;

[0060] Figure 17 Figure 2 is a schematic diagram of the inner core structure in the embodiment 2 of the present application;

[0061] Figure 18 Figure 3 is a top view of the inner core in the embodiment 2 of the present application;

[0062] Figure 19 Figure 4 is a schematic diagram of the inner core assembling the sealing gasket structure in the embodiment 2 of the present application.

[0063] In the figure: 1, inner core; 2, aluminum electrode; 3, air electrode; 4, cavity; 5, fastening cover; 6, pipe clamp; 7, groove; 8, sealing gasket; 9, through hole; 10, fastening ring table. DETAILED DESCRIPTION

[0064] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0065] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0066] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0067] The foregoing is considered as illustrative only of the principles of the application. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the application to the exact construction and practice described. Accordingly, all such variations are intended to be included within the scope of the present application as defined in the following claims, along with full equivalents thereof.

[0068] In the description of the present application, it is to be understood that the orientation terms such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings, which are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the scope of protection of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the components themselves.

[0069] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0070] In addition, it should be noted that the use of the terms "first", "second", etc. to describe various components is merely intended to distinguish the corresponding components, and the above terms do not have special meanings unless otherwise stated, and therefore cannot be construed as limiting the scope of protection of the present application.

[0071] As shown in the figure, this invention provides a cylindrical aluminum-air battery structure. The proposed cylindrical aluminum-air battery structure is also applicable to other types of metal-air batteries that utilize liquid electrolytes, such as zinc-air, magnesium-air, and other metal-air batteries and stacks.

[0072] This invention provides a cylindrical aluminum-air battery structure, which is also applicable to other situations where a cylindrical inner core and an annular fastening cap are required to form a sealed cavity.

[0073] This invention provides a cylindrical aluminum-air battery structure. One solution is to design the cylindrical inner core and the annular fastening cover separately, while another solution is to design the cylindrical inner core and the fastening ring as an integral part.

[0074] Example 1

[0075] like Figures 1-14 As shown, the present invention provides a cylindrical aluminum-air battery structure comprising: an inner core 1, an aluminum electrode 2, a fastening cover 5, an air electrode 3, and a clamp 6; the inner core 1 is a hollow cylindrical structure; the aluminum electrode 2 is wrapped around the outer surface of the inner core 1 to form a cylindrical structure; the fastening cover 5 is an annular structure with a through hole 9 penetrating the upper and lower surfaces to allow the electrolyte to flow in and out; a fastening cover 5 is provided on the upper and lower sides of the aluminum electrode 2; the top surface of the upper fastening cover 5 is flush with the top surface of the inner core 1, and the bottom surface of the lower fastening cover 5 is flush with the bottom edge surface of the inner core 1; the air electrode 3 is wrapped around the outer surface of the fastening cover 5 to form a cylindrical structure; a clamp 6 is provided on the upper and lower sides of the air electrode 3, and the installation positions of the two clamps 6 correspond one-to-one with the upper and lower fastening covers 5, thereby fastening the air electrode 3, the fastening cover 5, and the aluminum electrode 2 layer to the outer surface of the inner core 1.

[0076] An annular groove 7 is provided on the upper and lower sides of the outer wall of the inner core 1; a sealing gasket 8 is placed in the groove 7 to seal the outer wall of the inner core 1 and the inner wall of the aluminum electrode 2 to prevent electrolyte leakage along the outer wall of the inner core 1.

[0077] An annular groove 7 is provided on both the inner and outer walls of the fastening cover 5; a sealing gasket 8 is placed in the groove 7; the sealing gasket 8 installed on the inner side of the fastening cover 5 seals the outer wall of the aluminum electrode 2 and the inner wall of the fastening cover 5 to prevent electrolyte leakage along the outer wall of the aluminum electrode 2; the sealing gasket 8 installed on the outer side of the fastening cover 5 seals the outer wall of the fastening cover 5 and the inner wall of the air electrode 3 to prevent electrolyte leakage along the inner wall of the air electrode 3.

[0078] The upper edge of the aluminum electrode 2 is higher than the top end surface of the inner core 1 for collecting current. The upper edge of the air electrode 3 is higher than the top end surface of the inner core 1 for collecting current; the aluminum electrode 2 and the air electrode 3, which are higher than the top end surface of the inner core, form two current collectors of the negative and positive electrodes of the battery, which are used for series and parallel connection between different single batteries to form the battery stack.

[0079] A cavity 4 for electrolyte flow is formed between the aluminum electrode 2 and the air electrode 3 by means of the fastening cover 5 and the sealing gasket 8.

[0080] The air electrode 3 is composed of three layers, from outside to inside, a hydrophobic gas diffusion layer, a nickel mesh, and a catalytic layer, which is a compact layered structure, can be supported by the nickel mesh itself, and can prevent the electrolyte from penetrating through.

[0081] The through hole 9 on the fastening cover 5 on the upper part of the inner core 1 is arranged at an angle of 180 degrees with the through hole 9 on the fastening cover 5 on the lower part.

[0082] Example 2

[0083] As shown in Figures 15-19 , on the basis of example 1, the present application also provides a cylindrical aluminum-air battery structure;

[0084] The lower part of the inner core 1 can also be integrally processed with a fastening ring table 10, which has the same effect as the fastening cover 5;

[0085] The outer wall of the inner core 1 is processed with a groove 7 close to the position of the fastening ring table 10 on the lower part, which is used to assemble the sealing gasket 8;

[0086] The upper end surface of the fastening ring table 10 is processed with a groove 7 close to the position of the outer wall of the inner core 1, which is used to assemble the sealing gasket 8;

[0087] The outer part of the inner core 1 is covered by the aluminum electrode 2, the bottom end of which is inserted into the groove 7 on the upper end of the fastening ring table 10, and located inside the sealing gasket 8 in the groove 7;

[0088] The sealing gasket 8 assembled on the lower part of the inner core 1 and the sealing gasket 8 assembled on the upper end surface of the fastening ring table 10 jointly clamp and seal the aluminum electrode 2;

[0089] The outer wall of the fastening ring table 10 is processed with a groove 7, which is used to assemble the sealing gasket 8, which seals between the outer wall of the fastening cover 5 and the inner wall of the air electrode 3, to prevent the electrolyte from leaking along the inner wall of the air electrode 3;

[0090] The fastening ring table 10 is provided with a through hole 9 penetrating the upper and lower surfaces for the inflow and outflow of electrolyte.

[0091] An annular groove 7 is provided on the outer wall of the inner core 1 on the upper part;

[0092] The sealing gasket 8 is placed in the groove 7 to seal the space between the outer wall of the inner core 1 and the inner wall of the aluminum electrode 2, so as to prevent the electrolyte from leaking along the outer wall of the inner core 1.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cylindrical aluminum air cell structure, characterized in that: the cylindrical aluminum air cell structure comprises an inner core (1), an aluminum electrode (2), a fastening cover (5), an air electrode (3) and a pipe clamp (6); the inner core (1) is a hollow cylindrical structure; the inner core (1) is coated with the aluminum electrode (2) to form a cylindrical structure; the fastening cover (5) is a circular ring structure, and a through hole (9) is arranged on the upper and lower surfaces of the fastening cover (5) to allow the inflow and outflow of electrolyte; the aluminum electrode (2) is provided with an upper fastening cover (5) and a lower fastening cover (5) on the upper and lower outer surfaces of the aluminum electrode (2); the top end surface of the upper fastening cover (5) is flush with the top end surface of the inner core (1), and the bottom end surface of the lower fastening cover (5) is flush with the bottom end surface of the inner core (1); the air electrode (3) is coated on the outer surface of the fastening cover (5) to form a cylindrical structure; the air electrode (3) is provided with an upper pipe clamp (6) and a lower pipe clamp (6) on the outer surface of the air electrode (3); the installation positions of the two pipe clamps (6) correspond to the upper and lower fastening covers (5) respectively, and the air electrode (3), the fastening cover (5) and the aluminum electrode (2) are fastened together to form a layer on the outer surface of the inner core (1).

2. The cylindrical aluminum air cell structure according to claim 1, characterized in that: the outer wall of the inner core (1) is provided with an annular groove (7) on the upper and lower surfaces of the outer wall of the inner core (1); the annular groove (7) is provided with a sealing gasket (8) to seal the outer wall of the inner core (1) and the inner wall of the aluminum electrode (2) to prevent the leakage of electrolyte along the outer wall of the inner core (1).

3. The cylindrical aluminum air cell structure according to claim 1, characterized in that: the inner wall and the outer wall of the fastening cover (5) are provided with an annular groove (7) on the inner wall and the outer wall of the fastening cover (5); the annular groove (7) is provided with a sealing gasket (8); the sealing gasket (8) assembled on the inner wall of the fastening cover (5) seals the outer wall of the aluminum electrode (2) and the inner wall of the fastening cover (5) to prevent the leakage of electrolyte along the outer wall of the aluminum electrode (2); the sealing gasket (8) assembled on the outer wall of the fastening cover (5) seals the outer wall of the fastening cover (5) and the inner wall of the air electrode (3) to prevent the leakage of electrolyte along the inner wall of the air electrode (3).

4. The cylindrical aluminum air cell structure according to claim 3, characterized in that: the upper edge of the aluminum electrode (2) is higher than the top end surface of the inner core (1) to collect current; the upper edge of the air electrode (3) is higher than the top end surface of the inner core (1) to collect current; the aluminum electrode (2) and the air electrode (3) which are higher than the top end surface of the inner core form two current collectors of the negative electrode and the positive electrode of the battery, which are used for series connection and parallel connection between different single batteries to form a battery stack.

5. The cylindrical aluminum air cell structure according to claim 4, characterized in that: a cavity (4) for the flow of electrolyte is formed between the aluminum electrode (2) and the air electrode (3) by the fastening cover (5) and the sealing gasket (8).

6. The cylindrical aluminum air cell structure according to claim 5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The air electrode (3) is composed of three layers, from outside to inside, hydrophobic gas diffusion layer, nickel mesh, and catalytic layer, which is a compact layered structure, supported by the nickel mesh, and can prevent the electrolyte from penetrating.

7. The cylindrical aluminum air cell structure of claim 1, wherein: The through hole (9) on the fastening cover (5) of the upper part of the inner core (1) is arranged at an angle of 180 degrees with the through hole (9) on the fastening cover (5) of the lower part.

8. The cylindrical aluminum air cell structure of claim 1, wherein: The lower part of the inner core (1) can also be integrally processed with a fastening ring table (10), which has the same effect as the fastening cover (5); The outer wall of the inner core (1) is processed with a groove (7) near the position of the fastening ring table (10) at the lower part, which is used to assemble the sealing washer (8); The upper end surface of the fastening ring table (10) is processed with a groove (7) near the position of the outer wall of the inner core (1), which is used to assemble the sealing washer (8); The outer part of the inner core (1) is covered by the aluminum electrode (2), the bottom end of the aluminum electrode (2) is inserted into the groove (7) on the upper end of the fastening ring table (10), and is located inside the sealing washer (8) in the groove (7); The sealing washer (8) assembled on the lower part of the inner core (1) and the sealing washer (8) assembled on the upper end surface of the fastening ring table (10) together clamp and seal the aluminum electrode (2); The outer wall of the fastening ring table (10) is processed with a groove (7), which is used to assemble the sealing washer (8), which seals between the outer wall of the fastening cover (5) and the inner wall of the air electrode (3), to prevent the electrolyte from leaking along the inner wall of the air electrode (3); The fastening ring table (10) is provided with a through hole (9) penetrating the upper and lower surfaces, for the inflow and outflow of the electrolyte.

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