Battery steel shell with high-temperature-resistant and high-humidity-resistant functions

Abstract

The utility model discloses a battery steel shell with high-temperature-resistant and high-humidity-resistant functions. The battery steel shell comprises a cylindrical steel shell, a cathode end cover, an isolation tube, a conductive rod and a sealing assembly, one end of the cylindrical steel shell is an open end, and the other end of the cylindrical steel shell is closed to serve as a positive end as a positive electrode of the battery; the sealing assembly comprises an upper sealing cover and a lower sealing cover which are overlapped up and down, the head part of the conductive rod is positioned between the negative end cover and the sealing assembly, the rod part of the conductive rod sequentially penetrates through the upper sealing cover and the lower sealing cover and then extends into the isolation tube, and a circle of fixing rib is upwards and convexly arranged on the outer edge of the lower sealing cover; the lower sealing cover wraps the upper sealing cover and the negative electrode end cover on the inner side of the lower sealing cover through fixing ribs; the sealing assembly further comprises an outer sealing ring and an inner sealing ring which can be elastically deformed. When the battery steel shell deforms in a high-temperature and high-humidity environment, the outer sealing ring and the inner sealing ring can still be hermetically matched in the battery steel shell, so that the inside of the battery steel shell is isolated from the outside, and the high-temperature-resistant and high-humidity-resistant functions of the battery steel shell are realized.

Description

Technical Field

[0001] The utility model relates to the field of battery steel shells, in particular to a battery steel shell with high temperature resistance and high humidity resistance functions. Background Art

[0002] Battery refers to a cup, trough or other container or part of the space of a composite container that contains an electrolyte solution and a metal electrode to generate an electric current. It is a device that can convert chemical energy into electrical energy. It has a positive electrode and a negative electrode. With the advancement of science and technology, batteries generally refer to small devices that can generate electrical energy. The performance parameters of batteries mainly include electromotive force, capacity, specific energy and resistance. Using batteries as an energy source can obtain an electric current with stable voltage, stable current, long-term stable power supply, and little external influence. The battery has a simple structure, is easy to carry, and is easy to charge and discharge. It is not affected by external climate and temperature, has stable and reliable performance, and plays a great role in all aspects of modern social life.

[0003] The main components of the battery are its external steel shell and the internal positive and negative electrode materials and electrolyte. The positive and negative electrode materials and electrolytes in some batteries contain liquids, such as zinc-manganese batteries. Zinc-manganese batteries are primary batteries with manganese dioxide as the positive electrode, zinc as the negative electrode, and ammonium chloride aqueous solution as the main electrolyte. Not only will there be liquids in the battery, but there will also be liquids in the use environment of some batteries. Therefore, the sealing requirements for the battery steel shell are relatively high to ensure that the liquid in the battery will not seep out of the steel shell, and the external liquid cannot enter the battery steel shell.

[0004] For example, the Chinese patent with patent number ZL202322047701.8 discloses: "A highly sealed battery steel shell top packaging structure, comprising an outer shell, an insulating layer is arranged on the inner wall of the outer shell, a battery body is arranged inside the outer shell, a sealing cover is arranged on the top of the outer shell, a first sealing ring is arranged at the bottom of the sealing cover, and a second sealing ring is arranged at the bottom of the first sealing ring. The utility model is provided with a first sealing ring, a second sealing ring, a first sealing groove and a second sealing groove for use in combination, which can effectively improve the sealing performance of the connection and installation between the sealing cover and the outer shell, and a sealing gasket is provided inside the first sealing groove and the second sealing groove, and a supporting air cushion is provided inside the sealing gasket for use in combination, which can further improve the tightness of the connection, thereby improving the sealing performance, preventing long-term working use or being subjected to external forces from causing poor sealing performance, affecting the working use effect, and facilitating the improvement of its structural practicality and functionality."

[0005] In actual use, some batteries need to be used in high temperature and high humidity environments. The high temperature environment can easily cause the battery steel shell to deform, which in turn causes gaps in the sealing between the parts, while the high humidity environment can make it easier for moisture to enter the battery steel shell.

[0006] However, including the solutions described in the above patents, the battery steel shells of the batteries in the prior art cannot maintain their sealing intact in a high temperature and high humidity environment. Summary of the invention

[0007] In order to overcome the deficiency in the prior art of a battery steel shell that is lacking in the ability to maintain its sealing properties in a high temperature and high humidity environment, the utility model provides a battery steel shell that is resistant to high temperature and high humidity.

[0008] The technical solution of the utility model to solve the technical problem is: a battery steel shell with high temperature resistance and high humidity resistance, including:

[0009] A cylindrical steel shell, one end of which is set as an open end and the other end is closed and set as a positive terminal to serve as the positive electrode of the battery;

[0010] a negative terminal cap connected to the open end to serve as the negative electrode of the battery;

[0011] An isolation tube is inserted into the cylindrical steel shell, the top of the isolation tube is provided with an opening, the opening is arranged toward the open end, and the bottom of the isolation tube abuts against the inner wall of the positive terminal;

[0012] The conductive rod has a rod portion inserted into the isolation tank and a head portion abutting against the inner wall of the negative terminal cover;

[0013] A sealing assembly is arranged between the open end and the negative terminal cover, the sealing assembly includes an upper sealing cover and a lower sealing cover which are arranged in a stacked manner, the head of the conductive rod is located between the negative terminal cover and the sealing assembly, and the rod of the conductive rod passes through the upper sealing cover and the lower sealing cover in sequence and then extends into the isolation tube, a circle of fixing ribs is protruded upward at the outer edge of the lower sealing cover, and the lower sealing cover covers the upper sealing cover and the negative terminal cover on its inner side through the fixing ribs;

[0014] The sealing assembly also includes an outer sealing ring and an inner sealing ring which are elastically deformable;

[0015] An upper bending portion is provided at the edge of the opening end, a lower bending portion is provided at the upper end of the fixing rib, an outer sealing gap is formed between the inner side surface of the upper bending portion and the outer side surface of the lower bending portion, the outer sealing ring is located in the outer sealing gap, and the outer sealing ring is elastically deformed under the extrusion of the upper bending portion and the lower bending portion, so that the outer sealing ring is interference-fitted in the outer sealing gap;

[0016] An inner sealing gap is formed between the inner side surface of the fixing rib, the bottom surface of the negative terminal cover and the outer edge surface of the upper sealing cover. The inner sealing ring is located in the inner sealing gap, and the inner sealing ring is elastically deformed under the extrusion of the fixing rib, the negative terminal cover and the upper sealing cover, so that the inner sealing ring is interference fit in the inner sealing gap.

[0017] Furthermore, a circle of first embedding grooves is provided on the inner side surface of the upper bending portion, and the outer sealing gap is formed by the combination of the first embedding groove and the outer side surface of the lower bending portion; a second embedding groove is provided on the inner side of the lower end of the fixed rib, and the inner sealing gap is formed by the combination of the second embedding groove, the bottom surface of the negative terminal cover and the outer edge surface of the upper sealing cover.

[0018] Furthermore, an external connecting column is protruding at the center position of the lower sealing cover, and an external connecting hole is opened vertically through the external connecting column; an internal connecting column is protruding at the center position of the upper sealing cover, and an internal connecting hole is opened vertically through the internal connecting column; the internal connecting column is penetrated into the external connecting hole, and the rod portion of the conductive rod is penetrated into the internal connecting hole.

[0019] Furthermore, the lower side of the upper sealing cover is tightly fitted with the upper side of the lower sealing cover, and the upper side of the lower sealing cover is also concavely provided with a plurality of sealing grooves, and the lower side of the upper sealing cover is convexly provided with a plurality of sealing ribs facing downward, and the sealing ribs are snap-fitted into the sealing grooves.

[0020] Furthermore, a retaining plate is included, which includes a through hole opened at the center. The retaining plate is clamped between the sealing assembly and the isolation tube near the center. The external connecting column extends into the isolation tube through the through hole. The lower side surface of the lower sealing cover also has a circle of retaining ribs protruding downward, and the retaining ribs abut and cooperate with the upper side surface of the retaining plate.

[0021] Furthermore, a circle of limiting recess is concave inwardly provided on the outer edge of the cylindrical steel shell near the upper end, the sealing assembly is clamped between the limiting recess and the open end, and a circle of supporting ribs is also protruded inwardly below the inner side of the limiting recess, and the supporting ribs abut and cooperate with the lower side surface of the retaining plate.

[0022] Furthermore, a limiting groove is recessed downwardly on the inner side of the bottom of the cylindrical steel shell, the bottom of the isolation tube is plugged into the limiting groove, and the side wall of the bottom of the isolation tube is in abutment with the groove wall of the limiting groove.

[0023] Furthermore, a flange is folded upward at the edge of the negative terminal cover, the outer side of the flange is fitted with the inner side of the fixing rib, and a contact step is protruded on the inner side of the top of the fixing rib, and the contact step is in contact with the top of the flange.

[0024] The utility model discloses a method for maintaining the sealing performance of a battery steel shell in a high temperature and high humidity environment: the cylindrical steel shell is exposed to the outermost side during the use of the battery, and when the battery is used in a high temperature and high humidity environment, the cylindrical steel shell will produce a certain deformation, especially the upper bend portion at the open end, and the deformation of the upper bend portion will cause the open end to warp upward, thereby increasing the gap between the open end and the sealing component, but the deformation of the upper bend portion will also increase the outer sealing gap, and the extrusion of the outer sealing ring will be partially released, causing the outer sealing ring to recover elastically, so that the outer sealing ring can still be interference fit in the outer sealing gap, thereby ensuring the sealing performance between the cylindrical steel shell and the sealing component; secondly, the negative terminal cover and the sealing component are also It will produce a certain deformation at high temperature, and when the two are deformed, the inner sealing gap will increase, resulting in the release of the extruded part of the inner sealing ring, and the inner sealing ring elastically recovers and continues to interference fit in the inner sealing gap, thereby ensuring the sealing between the negative terminal cover and the sealing assembly; and the only paths for moisture in a high humidity environment to enter the battery steel shell are the gap between the open end and the sealing assembly and the gap between the negative terminal cover and the sealing assembly, but because these two paths are blocked by the outer sealing ring and the inner sealing ring, moisture cannot enter the battery steel shell; thereby ensuring that the battery steel shell can be used in a high temperature and high humidity environment, and ensuring that the internal medium of the battery will not leak, and external moisture will not enter the battery.

[0025] The beneficial effects of the utility model are:

[0026] 1. An outer sealing gap is provided between the open end of the battery steel shell and the sealing assembly, and an inner sealing gap is provided between the sealing assembly and the negative terminal cover, and an outer sealing ring and an inner sealing ring which are elastically deformed by extrusion are interference-fitted in the outer sealing gap and the inner sealing gap. Therefore, when the battery steel shell is deformed under high temperature and high humidity environment, the outer sealing ring and the inner sealing ring can still be sealed and fitted in the battery steel shell, ensuring the isolation between the inside and outside of the battery steel shell, thus realizing the high temperature and high humidity resistance function of the battery steel shell;

[0027] 2. A retaining plate is provided, which is supported under the sealing assembly, and a supporting rib is provided on the cylindrical steel shell to support the retaining plate, so that the sealing assembly can be further fixed relative to the cylindrical steel shell under the action of the retaining plate. Even if the cylindrical steel shell is deformed at high temperature, the sealing assembly will not change position relative to the cylindrical steel shell;

[0028] 3. A sealing groove and a sealing rib are provided between the upper sealing cover and the lower sealing cover to further enhance the sealing between the two, thereby further improving the sealing performance of the battery steel shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the first embodiment of the present utility model.

[0030] Figure 2 It is another structural schematic diagram of the first embodiment of the present utility model.

[0031] Figure 3 It is an explosion diagram of the first embodiment of the utility model.

[0032] Figure 4 It is a cross-sectional view of the first embodiment of the present invention.

[0033] Figure 5 yes Figure 4 A magnified schematic diagram of center A.

[0034] Figure 6 It is a partial cross-sectional view of the second embodiment of the present utility model.

[0035] Figure 7 yes Figure 6 A magnified schematic diagram of point B in the middle.

[0036] Numbers in the figure: 1. cylindrical steel shell; 2. open end; 3. positive terminal; 4. negative terminal cover; 5. isolation tube; 6. opening; 7. conductive rod; 8. upper sealing cover; 9. lower sealing cover; 10. fixing rib; 11. outer sealing ring; 12. inner sealing ring; 13. upper bending part; 14. lower bending part; 15. outer sealing gap; 16. inner sealing gap; 17. first fitting groove; 18. second fitting groove; 19. outer connecting column; 20. outer connecting hole; 21. inner connecting column; 22. inner connecting hole; 23. sealing groove; 24. sealing rib; 25. retaining plate; 26. through hole; 27. retaining rib; 28. limiting depression; 29. ​​supporting rib; 30. limiting groove; 31. flange; 32. abutting step; 33. auxiliary sealing ring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0039] Embodiment 1

[0040] Combination Figures 1 to 5The battery steel shell with high temperature and high humidity resistance shown in the figure includes a cylindrical steel shell 1, a negative terminal cover 4, an isolation tube 5, a conductive rod 7 and a sealing assembly; one end of the cylindrical steel shell 1 is set as an open end 2, and the other end is closed and set as a positive terminal 3 to serve as the positive electrode of the battery; the negative terminal cover 4 is connected to the open end 2 to serve as the negative electrode of the battery; the isolation tube 5 is passed through the cylindrical steel shell 1, and the top of the isolation tube 5 is provided with an opening 6, and the opening 6 is arranged toward the open end 2, and the bottom of the isolation tube 5 abuts and cooperates with The inner wall of the positive terminal 3; the rod of the conductive rod 7 is inserted into the isolation tank, and the head thereof is abutted against the inner wall of the negative terminal cover 4; the sealing assembly is arranged between the opening end 2 and the negative terminal cover 4, and the sealing assembly includes an upper sealing cover 8 and a lower sealing cover 9 which are arranged in a stacked manner. The head of the conductive rod 7 is located between the negative terminal cover 4 and the sealing assembly, and the rod of the conductive rod 7 passes through the upper sealing cover 8 and the lower sealing cover 9 in sequence and then extends into the isolation tube 5. The outer edge of the lower sealing cover 9 is provided with a circle protruding upward. The fixing rib 10, the lower sealing cover 9 covers the upper sealing cover 8 and the negative terminal cover 4 on its inner side through the fixing rib 10; the sealing assembly also includes an elastically deformable outer sealing ring 11 and an inner sealing ring 12; an upper bending portion 13 is provided at the edge of the opening end 2, and a lower bending portion 14 is provided at the upper end of the fixing rib 10, and an outer sealing gap 15 is formed between the inner side surface of the upper bending portion 13 and the outer side surface of the lower bending portion 14, and the outer sealing ring 11 is located in the outer sealing gap 15, and the outer sealing ring 1 1 undergoes elastic deformation under the extrusion of the upper bending portion 13 and the lower bending portion 14, so that the outer sealing ring 11 is interference-fitted in the outer sealing gap 15; an inner sealing gap 16 is formed between the inner side surface of the fixing rib 10, the bottom surface of the negative terminal cover 4 and the outer edge surface of the upper sealing cover 8, and the inner sealing ring 12 is located in the inner sealing gap 16, and the inner sealing ring 12 undergoes elastic deformation under the extrusion of the fixing rib 10, the negative terminal cover 4 and the upper sealing cover 8, so that the inner sealing ring 12 is interference-fitted in the inner sealing gap 16.

[0041] In this embodiment, a circle of first embedding grooves 17 are further provided on the inner side surface of the upper bending portion 13, and the outer sealing gap 15 is formed by the combination of the first embedding grooves 17 and the outer side surface of the lower bending portion 14; a second embedding groove 18 is further provided on the inner side of the lower end of the fixing rib 10, and the inner sealing gap 16 is formed by the combination of the second embedding grooves 18, the bottom surface of the negative terminal cover 4 and the outer edge surface of the upper sealing cover 8.

[0042] In this embodiment, an external connecting column 19 is protruded at the center position of the lower sealing cover 9, and an external connecting hole 20 is opened vertically through the external connecting column 19; an internal connecting column 21 is protruded at the center position of the upper sealing cover 8, and an internal connecting hole 22 is opened vertically through the internal connecting column 21; the internal connecting column 21 is penetrated into the external connecting hole 20, and the rod portion of the conductive rod 7 is penetrated into the internal connecting hole 22.

[0043] In this embodiment, the lower side surface of the upper sealing cover 8 is tightly fitted with the upper side surface of the lower sealing cover 9, and a plurality of circular sealing grooves 23 are recessed on the upper side surface of the lower sealing cover 9, and a plurality of circular sealing ribs 24 are convexly provided downward on the lower side surface of the upper sealing cover 8, and the sealing ribs 24 are snap-fitted into the sealing grooves 23.

[0044] In this embodiment, a retaining plate 25 is also included, and the retaining plate 25 includes a through hole 26 opened at the center thereof. The retaining plate 25 is clamped between the sealing assembly and the isolation tube 5 near the center, and the external connecting column 19 extends into the isolation tube 5 through the through hole 26. The lower side surface of the lower sealing cover 9 also has a circle of retaining ribs 27 protruding downward, and the retaining ribs 27 abut against the upper side surface of the retaining plate 25.

[0045] In this embodiment, a circle of limiting recess 28 is recessed inward near the upper end of the outer edge of the cylindrical steel shell 1, and the sealing assembly is clamped between the limiting recess 28 and the open end 2, and a circle of supporting ribs 29 is also protruded inward below the inner side of the limiting recess 28, and the supporting ribs 29 abut against the lower side of the retaining plate 25.

[0046] In this embodiment, a limiting groove 30 is recessed downward on the inner side of the bottom of the cylindrical steel shell 1, the bottom of the isolation tube 5 is plugged into the limiting groove 30, and the side wall of the bottom of the isolation tube 5 is in abutment with the groove wall of the limiting groove 30.

[0047] In this embodiment, a flange 31 is folded upward at the edge of the negative terminal cover 4, and the outer side surface of the flange 31 is fitted with the inner side surface of the fixing rib 10, and a contact step 32 is also protruded from the inner side of the top of the fixing rib 10, and the contact step 32 is in contact with the top of the flange 31.

[0048] In the present embodiment, the method for maintaining the sealing of the battery steel shell in a high temperature and high humidity environment is as follows: the cylindrical steel shell 1 is exposed to the outermost side during the use of the battery, and when the battery is used in a high temperature and high humidity environment, the cylindrical steel shell 1 will produce a certain deformation, especially the upper bend portion 13 of the opening end 2. The deformation of the upper bend portion 13 will cause the opening end 2 to be tilted upward, thereby increasing the gap between the opening end 2 and the sealing component, but the deformation of the upper bend portion 13 will also increase the outer sealing gap 15, and the extruded part of the outer sealing ring 11 will be released, causing the outer sealing ring 11 to recover elastically, so that the outer sealing ring 11 can still be interference fit in the outer sealing gap 15, thereby ensuring the sealing between the cylindrical steel shell 1 and the sealing component; the second is the negative terminal cover 4 and the sealing The components will also produce certain deformation at high temperatures. When the two are deformed, the inner sealing gap 16 will increase, resulting in the release of the squeezed part of the inner sealing ring 12. The inner sealing ring 12 elastically recovers and continues to interference fit in the inner sealing gap 16 to ensure the sealing between the negative terminal cover 4 and the sealing component. The only paths for moisture in a high-humidity environment to enter the battery steel shell are the gap between the open end 2 and the sealing component and the gap between the negative terminal cover 4 and the sealing component. However, since these two paths are blocked by the outer sealing ring 11 and the inner sealing ring 12, moisture cannot enter the battery steel shell. This ensures that the battery steel shell can be used in a high-temperature and high-humidity environment, and ensures that the internal medium of the battery will not leak and external moisture will not enter the battery.

[0049] The advantage of this embodiment is that the battery steel shell can still maintain its sealing performance in a high temperature and high humidity environment, thereby achieving the functions of high temperature resistance and high humidity resistance.

[0050] Embodiment 2

[0051] Combination Figure 6 and Figure 7 As shown, this embodiment is another implementation method of the sealing method between the upper sealing cover 8 and the lower sealing cover 9 in the sealing assembly of the above-mentioned embodiment 1. The main difference between this embodiment and the above-mentioned embodiment 1 is that: in this embodiment, the lower side surface of the upper sealing cover 8 does not have a sealing rib 24 protruding therefrom, while the upper side surface of the lower sealing cover 9 is still provided with a sealing groove 23, and an auxiliary sealing ring 33 is embedded in the sealing groove 23. The sealing ring is interference fit in the sealing groove 23 under the extrusion of the lower side surface of the upper sealing cover 8.

[0052] The remaining structures and methods of this embodiment are consistent with the above-mentioned embodiment 1 and will not be described again here.

[0053] The advantage of this embodiment is that: on the basis of the first embodiment, another setting method of the sealing structure between the upper sealing cover and the lower sealing cover is provided, and the selection can be adapted according to the actual use environment of the battery steel shell.

[0054] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A battery steel shell with high temperature and high humidity resistance, comprising: A cylindrical steel shell (1) having one end configured as an open end (2) and the other end configured as a positive terminal (3) to serve as a positive electrode of a battery; A negative terminal cap (4) connected to the opening end (2) to serve as the negative electrode of the battery; An isolation tube (5) is inserted into the cylindrical steel shell (1), an opening (6) is provided at the top of the isolation tube (5), the opening (6) is arranged toward the opening end (2), and the bottom of the isolation tube (5) abuts against the inner wall of the positive terminal (3); A conductive rod (7), the rod portion of which is inserted into the isolation tank and the head portion of which is abutted against the inner wall of the negative terminal cover (4); A sealing assembly is arranged between the opening end (2) and the negative terminal cover (4), the sealing assembly comprises an upper sealing cover (8) and a lower sealing cover (9) which are arranged in a stacked manner, the head of the conductive rod (7) is located between the negative terminal cover (4) and the sealing assembly, and the rod of the conductive rod (7) passes through the upper sealing cover (8) and the lower sealing cover (9) in sequence and then extends into the isolation tube (5), a circle of fixing ribs (10) is protruding upward at the outer edge of the lower sealing cover (9), and the lower sealing cover (9) covers the upper sealing cover (8) and the negative terminal cover (4) on its inner side through the fixing ribs (10); Features: The sealing assembly also includes an elastically deformable outer sealing ring (11) and an inner sealing ring (12); An upper bending portion (13) is provided at the edge of the opening end (2), a lower bending portion (14) is provided at the upper end of the fixing rib (10), an outer sealing gap (15) is formed between the inner side surface of the upper bending portion (13) and the outer side surface of the lower bending portion (14), the outer sealing ring (11) is located in the outer sealing gap (15), and the outer sealing ring (11) is elastically deformed under the extrusion of the upper bending portion (13) and the lower bending portion (14), so that the outer sealing ring (11) is interference-fitted in the outer sealing gap (15); An inner sealing gap (16) is formed between the inner side surface of the fixing rib (10), the bottom surface of the negative terminal cover (4) and the outer edge surface of the upper sealing cover (8); the inner sealing ring (12) is located in the inner sealing gap (16), and the inner sealing ring (12) is elastically deformed under the pressure of the fixing rib (10), the negative terminal cover (4) and the upper sealing cover (8), so that the inner sealing ring (12) is interference-fitted in the inner sealing gap (16).

2. The battery steel shell with high temperature and high humidity resistance according to claim 1, characterized in that: A circle of first interlocking grooves (17) are also provided on the inner side surface of the upper bending portion (13), and the outer sealing gap (15) is formed by the combination of the first interlocking grooves (17) and the outer side surface of the lower bending portion (14); a second interlocking groove (18) is also provided on the inner side of the lower end of the fixing rib (10), and the inner sealing gap (16) is formed by the combination of the second interlocking grooves (18), the bottom surface of the negative terminal cover (4) and the outer edge surface of the upper sealing cover (8).

3. The battery steel shell with high temperature and high humidity resistance according to claim 1, characterized in that: An external connection column (19) is protrudingly provided at the center position of the lower sealing cover (9), and an external connection hole (20) is opened vertically through the external connection column (19); an internal connection column (21) is protrudingly provided at the center position of the upper sealing cover (8), and an internal connection hole (22) is opened vertically through the internal connection column (21); the internal connection column (21) is inserted into the external connection hole (20), and the rod portion of the conductive rod (7) is inserted into the internal connection hole (22).

4. The battery steel shell with high temperature and high humidity resistance according to claim 3, characterized in that: The lower side surface of the upper sealing cover (8) is tightly fitted with the upper side surface of the lower sealing cover (9), and a plurality of circular sealing grooves (23) are concavely provided on the upper side surface of the lower sealing cover (9). The lower side surface of the upper sealing cover (8) is convexly provided with a plurality of circular sealing ribs (24) facing downward, and the sealing ribs (24) are snap-fitted into the sealing grooves (23).

5. The battery steel shell with high temperature and high humidity resistance according to claim 3, characterized in that: The invention also comprises a retaining plate (25), wherein the retaining plate (25) comprises a through hole (26) opened at the center thereof, and the retaining plate (25) is sandwiched between the sealing assembly and the isolation tube (5) near the center thereof, and the external connecting column (19) extends into the isolation tube (5) through the through hole (26), and the lower side surface of the lower sealing cover (9) is also provided with a circle of retaining ribs (27) protruding downward, and the retaining ribs (27) are abutted and matched with the upper side surface of the retaining plate (25).

6. The battery steel shell with high temperature and high humidity resistance according to claim 5, characterized in that: The outer edge of the cylindrical steel shell (1) is provided with a circle of limiting recess (28) inwardly near the upper end, the sealing assembly is clamped between the limiting recess (28) and the opening end (2), and a circle of supporting ribs (29) is also provided inwardly below the inner side of the limiting recess (28), and the supporting ribs (29) are abutted and matched with the lower side of the retaining plate (25).

7. The battery steel shell with high temperature and high humidity resistance according to claim 1, characterized in that: A limiting groove (30) is recessed downwardly on the inner side of the bottom of the cylindrical steel shell (1), the bottom of the isolation tube (5) is plugged into the limiting groove (30), and the side wall of the bottom of the isolation tube (5) is in abutment with the groove wall of the limiting groove (30).

8. The battery steel shell with high temperature and high humidity resistance according to claim 1, characterized in that: The edge of the negative terminal cover (4) is folded upward to form a flange (31), the outer side surface of the flange (31) is fitted with the inner side surface of the fixing rib (10), and the inner side of the top of the fixing rib (10) is also protruded with an abutment step (32), and the abutment step (32) is abutted with the top of the flange (31).

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