A method for plastic sealing of a storage battery and the storage battery

Abstract

The application discloses a battery plastic sealing method and a battery, relates to the battery sealing technical field, and has the technical scheme as follows: a shell, an upper cover and a pole are arranged, the shell is internally provided with a plate and electrolyte, a through hole is formed in the upper cover, a sealing assembly is arranged between the pole and the through hole, a pressing block is further arranged in the through hole, a plurality of valves are arranged on the pressing block, the plurality of valves press against the outer wall of the pole when the pole passes through the pressing block, and the hot shrink sleeve is threadedly connected with the pole. The multiple sealing design effectively prevents the electrolyte from leaking, improves the sealing performance of the battery, the sealing method is simple and easy to implement, the sealing can be completed through the thread connection and the glue filling, the production efficiency is improved, the repair glue block and the third glue block are designed in the pressure triggering mode, when a small crack or aging leakage appears in the solidified layer of the glue ball, the repair mechanism is triggered by pressing the pressing block, the active repair capability of the battery is improved, and the internal liquid leakage is avoided.

Description

Technical Field

[0001] This invention relates to the field of battery sealing technology, and more specifically, to a method for sealing a battery with plastic and a battery. Background Technology

[0002] Lead-acid batteries are widely used in industrial production and daily life, playing a vital role in promoting national economic development. The battery casing, which holds the electrolyte and electrode assembly, should be made of materials that are acid-resistant, heat-resistant, shock-resistant, have good insulation, and possess sufficient mechanical strength. Currently, commonly used casing materials include engineering plastics such as polypropylene and ABS. These materials not only meet the requirements for acid and heat resistance but also provide good insulation and mechanical strength, effectively protecting the internal structure of the battery. However, the sealing of the terminals has always been a significant bottleneck in the technological development of lead-acid batteries.

[0003] Acid creep refers to the phenomenon in lead-acid batteries where, during use, sulfuric acid in the electrolyte rises along the surface of the terminals and eventually overflows from the sealed terminal area. This typically manifests as white or pale yellow acidic crystals around the terminals, and in severe cases, acid may even seep out. This is because the negative terminal is made of lead, which has larger molecular gaps, while the positive terminal is made of lead dioxide, which has smaller molecular gaps. Furthermore, the sealing materials between the terminals and the seals, such as epoxy resin, have poor adhesion to the silver-plated copper terminals, causing acid to creep along the terminal surface. Once acid creep occurs, it not only damages the battery's appearance and corrodes various power equipment, but also significantly shortens the battery's lifespan due to water and acid loss. Moreover, if the existing seals leak, the entire sealing area needs to be replaced, which is inconvenient.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a method for plastic sealing of a storage battery and a storage battery.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a method for sealing a storage battery with plastic and a storage battery, the storage battery being characterized in that: it includes a shell, a top cover and terminals, the shell is provided with plates and electrolyte, the top cover is provided with a through hole for the terminals to pass through, a sealing assembly is provided between the terminals and the through hole, the sealing assembly includes a heat shrink sleeve fitted outside the terminals and a sealing ring located between the heat shrink sleeve and the top cover, a clamping block is also provided in the through hole, the clamping block is provided with a plurality of mutually clamping valves, when the terminals pass through the clamping block, the plurality of valves clamp the outer wall of the terminals and contact the heat shrink sleeve, a cavity for accommodating adhesive is formed between the clamping block and the heat shrink sleeve;

[0007] The bottom of the clamping block is provided with a rubber ball, which includes a protective film and glue. The top surface of the heat shrink sleeve is provided with spikes. When both the clamping block and the heat shrink sleeve are located in the through hole, the spikes can pierce the protective film, allowing the glue to flow out and fill the cavity between the clamping block and the heat shrink sleeve.

[0008] The sidewall of the through hole is provided with a repair adhesive block, and the repair adhesive block contains repair adhesive. The pressing block is provided with a pressing component, which includes a pressing block and a spike. The pressing block has a through groove for accommodating the pressing block. One end of the spike is fixed to the pressing block, and the other end of the spike faces the repair adhesive block.

[0009] The present invention is further configured such that: a third adhesive block is provided inside the adhesive ball, the third adhesive block is composed of an elastic wrapping film and a repair adhesive, the elastic wrapping film is made of thermoplastic elastomer, and the repair adhesive is thixotropic silicone, which remains solid in an unpressurized state and becomes fluid after being pressed, and the volume of the third adhesive block is smaller than the internal space of the adhesive ball.

[0010] The present invention is further configured such that: four valves are provided, and when the pole passes through the abutment block, all four valves abut against the outer wall of the protective membrane, and the volume of the rubber ball is larger than the volume of the cavity.

[0011] The present invention is further configured such that: the heat-insulating sleeve includes a limiting part, a vertical part and a horizontal part, the two ends of the vertical part are respectively connected to the limiting part and the horizontal part, the cross-section of the limiting part is arranged in an inverted trapezoidal shape and the outer wall of the limiting block is in contact with the inner wall of the through hole, the outer diameter of the vertical part is the same as the diameter of the through hole, the outer diameter of the horizontal part is larger than the diameter of the through hole, and when the heat-insulating sleeve is located in the through hole, the distance between the top surface of the horizontal part and the upper cover is less than the thickness of the sealing ring.

[0012] The present invention is further configured such that: an annular sealing groove is provided on the outer side of the horizontal part, and an annular sealing rib matching the annular sealing groove is provided on the inner side of the sealing ring; when the hot adhesive sleeve is installed in the through hole, the annular sealing rib is embedded in the annular sealing groove.

[0013] The present invention is further configured such that: the material of the abutting block is elastic plastic, the outer side of the abutting block is provided with a plurality of positioning grooves evenly distributed along its circumference, the inner wall of the through hole is provided with positioning ribs that match the positioning grooves, and the abutting block is fixed to the through hole by the positioning ribs being embedded in the positioning grooves.

[0014] The present invention is further configured such that: one end of the valve is provided with an elastic sealing layer, the elastic sealing layer is tightly fitted to the outer wall of the pole, and the thickness of the elastic sealing layer is between 0.5 mm and 2 mm.

[0015] The present invention is further configured such that: the outer wall of the pole is coated with an anti-corrosion coating, the anti-corrosion coating being an epoxy resin coating or a polyurethane coating, and the thickness of the anti-corrosion coating being 0.1-0.5 mm.

[0016] A method for sealing a storage battery with plastic, characterized by the following steps:

[0017] S1: Fix the heat shrink sleeve in the through hole, so that the limiting part of the heat shrink sleeve fits against the inner wall of the through hole. At the same time, install the sealing ring between the horizontal part of the heat shrink sleeve and the top cover, so that the annular sealing rib of the sealing ring is embedded in the annular sealing groove of the heat shrink sleeve.

[0018] S2: Fix the clamping block to the pole post, so that the pole post passes through the valve of the clamping block, the valve abuts against the outer wall of the pole post and contacts the outer wall of the rubber ball;

[0019] S3: Insert the electrode into the heat shrink sleeve. The electrode and the heat shrink sleeve are fixed by the threaded connection between the electrode and the heat shrink sleeve. At the same time, the clamping block is driven into the through hole. The spikes on the top of the heat shrink sleeve pierce the protective film of the rubber ball, allowing the glue to flow out and fill the cavity between the clamping block and the heat shrink sleeve.

[0020] S4: After completing the threaded connection, check whether the connection between the terminal post and the heat shrink sleeve is firm and whether the glue completely fills the cavity. Apply sealant to the top and bottom surfaces of the cover to complete the sealing process of the battery.

[0021] In summary, the present invention has the following beneficial effects: the multiple sealing design of the clamping block, valve, heat shrink sleeve, and sealing ring effectively prevents electrolyte leakage and improves the sealing performance of the battery. The threaded connection between the heat shrink sleeve and the terminal post, as well as the positioning design of the clamping block, ensures the stability of the terminal post within the through hole, enhancing the reliability of the structure. Moreover, the sealing method is simple and easy to implement, and sealing can be completed through threaded connection and glue filling, improving production efficiency. The repair glue block and the third glue block adopt a pressure-triggered design. When the glue ball curing layer has micro-cracks or aging leakage, the repair mechanism is triggered by pressing the clamping block, which improves the active repair capability of the battery and avoids internal liquid leakage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 Cross-sectional view of the present invention Figure 1 ;

[0024] Figure 3 Cross-sectional view of the present invention Figure 2 ;

[0025] Figure 4 for Figure 3 Enlarged diagram of section A in the middle;

[0026] Figure 5 This is a schematic diagram of the structure of the clamping block in this invention;

[0027] Figure 6 This is a schematic diagram of the pressing component in this invention;

[0028] Figure 7 This is a schematic diagram of the structure of the heat shrink sleeve in this invention.

[0029] In the diagram: 1. Shell; 2. Top cover; 3. Electrode post; 4. Electrode plate; 5. Electrolyte; 6. Through hole; 7. Sealing assembly; 71. Heat shrink sleeve; 72. Sealing ring; 8. Pressing block; 81. Valve; 9. Cavity; 10. Glue ball; 711. Spike; 11. Repair glue block; 12. Pressing assembly; 121. Pressing block; 122. Spike; 82. Through groove; 101. Third glue block; 1011. Elastic wrapping film; 1012. Repair glue; 712. Limiting part; 713. Vertical part; 714. Horizontal part; 715. Annular sealing groove; 721. Annular sealing rib. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To better describe and illustrate the embodiments of this application, reference may be made to one or more accompanying drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the inventive creations of this application, the embodiments or preferred methods described herein.

[0032] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not indicate that the device referred to must have a specific orientation or operate in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] A method for sealing a storage battery with plastic and the storage battery, such as Figure 1 As shown, the device includes a housing 1, a top cover 2, and an electrode post 3. The housing 1 contains an electrode plate 4 and an electrolyte 5. The housing 1 is made of corrosion-resistant plastic to ensure that it can resist the erosion of the electrolyte 5 during long-term use. The electrode plate 4 is made of lead and its alloys and is used to store and release electrical energy. The electrolyte 5 is a sulfuric acid solution, which is used to facilitate ion transport between the electrode plates 4, thereby completing the electrochemical reaction. The top cover 2 has a through hole 6 to accommodate the electrode post 3. The cross-section of the through hole 6 is an inverted trapezoid. By setting the through hole 6, the electrode post 3 is provided with stable support through the gradually narrowing aperture during insertion, preventing the electrode post 3 from loosening or shifting during use. At the same time, the guiding effect of the inner wall of the through hole 6 ensures that the electrode post 3 can be quickly and accurately positioned during installation, improving assembly efficiency.

[0036] A sealing assembly 7 is provided between the electrode post 3 and the through hole 6. The sealing assembly 7 includes a heat shrink sleeve 71 fitted over the electrode post 3 and a sealing ring 72 located between the heat shrink sleeve 71 and the upper cover 2. The heat shrink sleeve 71 has high mechanical strength, anti-aging ability and excellent adhesion performance, and can tightly fit the outer surface of the electrode post 3 to form a preliminary seal. The sealing ring 72 further enhances the sealing effect and prevents the electrolyte 5 from leaking from the gap between the electrode post 3 and the upper cover 2. A clamping block 8 is also provided in the through hole 6. The clamping block 8 has several mutually abutting valves 81. The valves 81 can accommodate the electrode post 3 to pass through. When the electrode post 3 passes through the clamping block 8, the valves 81 will tightly abut the outer wall of the electrode post 3 and contact the heat shrink sleeve 71. A cavity 9 for accommodating glue is formed between the clamping block 8 and the heat shrink sleeve 71. 3. The terminal post 3 is fixed by a threaded connection. This threaded connection not only ensures the stability of the terminal post 3 within the through hole 6, but also enhances the reliability of the structure. During installation, the adhesive fills the cavity 9 between the clamping block 8 and the heat shrink sleeve 71, and after further curing, forms a robust sealing layer. By setting up structures such as the sealing components 7, namely the clamping block 8, the valve 81, the heat shrink sleeve 71, and the sealing ring 72, the multiple sealing design effectively prevents electrolyte leakage, improves the sealing performance of the battery, maintains the battery appearance, and extends the battery's service life. At the same time, the threaded connection between the heat shrink sleeve 71 and the terminal post 3, as well as the positioning design of the clamping block 8, ensures the stability of the terminal post 3 within the through hole 6, enhances the reliability of the structure, improves the overall performance of the battery, and provides protection for the battery's application in complex environments.

[0037] Specifically, the clamping block 8 is made of elastic plastic. Elastic plastic has the high elasticity of rubber and the ease of processing of plastic. It exhibits good elasticity and flexibility at room temperature and can be plastically processed at high temperatures. In battery applications, the high elasticity of elastic plastic ensures that the clamping block 8 can fit tightly against the outer wall of the terminal 3 when the terminal 3 is inserted, while maintaining stable sealing performance during use. The outer side of the clamping block 8 is provided with several positioning grooves evenly distributed along its circumference. The inner wall of the through hole 6 is provided with positioning ribs that match the positioning grooves. The clamping block 8 is fixed to the through hole 6 by the positioning ribs being embedded in the positioning grooves. Through the above settings, the matching design of the positioning grooves and positioning ribs can achieve precise positioning and fixation of the clamping block 8 in the through hole 6, which can avoid displacement caused by vibration or impact and play a role in preventing displacement. Moreover, the design of the positioning grooves and positioning ribs makes the installation of the clamping block 8 more convenient and improves production efficiency.

[0038] Furthermore, the bottom of the clamping block 8 is provided with a rubber ball 10, which includes a protective film and adhesive. The protective film is spherical and the adhesive is located inside the protective film. The top surface of the heat shrink sleeve 71 is provided with spikes 711. When both the clamping block 8 and the heat shrink sleeve 71 are located in the through hole 6, the spikes 711 can pierce the protective film, allowing the adhesive to flow out and fill the cavity 9 between the clamping block 8 and the heat shrink sleeve 71. The adhesive will also enter between the inner wall of the clamping block 8 and the through hole 6 or between the inner wall of the heat shrink sleeve 71 and the through hole 6. At the same time, there are four valves 81. When the pole post 3 passes through the clamping block 8, all four valves 81 abut against the outer wall of the protective film. The volume of the rubber ball 10 is larger than the volume of the cavity 9. The above scheme, through the valves 81 of the clamping block 8, the heat shrink sleeve 71, the sealing ring 72, and the cavity 9 filled with adhesive, forms a The multi-layer sealing structure effectively prevents electrolyte 5 from leaking from the gap between the electrode post 3 and the top cover 2, and further enhances the overall sealing performance. When the adhesive flows into the cavity 9, it cures and forms a solid filling layer, which further enhances the connection strength between the clamping block 8 and the heat shrink sleeve 71. At the same time, the design of the glue ball 10 automates the glue filling process. When the clamping block 8 and the heat shrink sleeve 71 are installed in place, the spike 711 automatically punctures the protective film, and the adhesive flows out and fills the cavity 9. This not only simplifies the assembly steps, but also reduces the error of manual operation and improves production efficiency. Moreover, the volume of the glue ball 10 is larger than the volume of the cavity 9, ensuring that the adhesive can completely fill the cavity 9 and has enough margin to cure. This preset glue amount design avoids the problem of insufficient glue and further improves the reliability of assembly.

[0039] A repair block 11 is also provided on the side wall of the through hole 6. The repair block 11 contains repair adhesive 1012. A pressing component 12 is provided on the pressing block 8. The pressing component 12 includes a pressing block 121 and a spike 122. A through groove 82 is provided on the pressing block 8 to accommodate the insertion of the pressing block 121. One end of the spike 122 is fixed to the pressing block 121, and the other end of the spike 122 faces the repair block 11. A third block 101 is provided inside the glue ball 10. The third block 101 is composed of an elastic wrapping film 1011 and repair adhesive 1012. The elastic wrapping film 1011 is made of thermoplastic elastomer, and the repair adhesive 1012 is thixotropic silicone. It remains solid in the unpressurized state and becomes fluid after being pressed. The volume of 01 is smaller than the internal space of the glue ball 10. By setting the repair glue block 11 and the pressing component 12, when the cured sealing layer has micro-leakage due to long-term vibration or thermal fatigue, there is no need to disassemble the battery. The operator only needs to press the pressing block 121 so that the piercing block 122 pierces the repair glue block 11. At this time, the repair glue 1012 in the repair glue block 11 flows out and quickly fills the leakage path. At the same time, the operator can also continue to turn the terminal post 3 so that the terminal post 3 squeezes the pressing block 8. At this time, the pressing block 8 will squeeze the sealing layer. The third glue block 101 in the sealing layer is squeezed and flows, thereby quickly filling the gap. Through the active repair and bidirectional sealing mechanism, the triple protection of the battery terminal post 3 is achieved, which plays a good sealing role.

[0040] The heat-insulating sleeve includes a limiting part 712, a vertical part 713, and a horizontal part 714. The two ends of the vertical part 713 are connected to the limiting part 712 and the horizontal part 714, respectively. The limiting part 712 has an inverted trapezoidal cross-section, and its outer wall fits against the inner wall of the through hole 6. The outer diameter of the vertical part 713 is the same as the diameter of the through hole 6, while the outer diameter of the horizontal part 714 is larger than the diameter of the through hole 6. When the heat-insulating sleeve is located inside the through hole 6, the distance between the top surface of the horizontal part 714 and the upper cover 2 is less than the thickness of the sealing ring 72. By providing the limiting part 712, the vertical part 713, and the horizontal part 714, the limiting part 712 can play a positioning role, improving the fit between the heat-insulating sleeve and the upper cover 2. The vertical part 713 protects the terminal post 3 and the connecting limit part 712 and the horizontal part 714. The horizontal part 714 acts as a retaining element for the sealing ring 72. After the sealing ring 72 is installed, the horizontal part 714 can hold it in place and make the sealing ring 72 fit tightly against the top cover 2, thereby improving the sealing performance. In summary, through the synergistic effect of the thermal sleeve, the sealing ring 72 and the retaining block 8, the overall sealing performance and stability of the battery are significantly improved. The good sealing performance reduces the risk of electrolyte leakage 5, maintains the appearance of the battery and improves the overall quality of the product.

[0041] An annular sealing groove 715 is provided on the outer side of the horizontal part 714, and an annular sealing rib 721 matching the annular sealing groove 715 is provided on the inner side of the sealing ring 72. When the heat-insulating sleeve is installed in the through hole 6, the annular sealing rib 721 is embedded in the annular sealing groove 715. After the annular sealing rib 721 is embedded in the annular sealing groove 715, a tight mechanical fit is formed between the sealing ring 72 and the heat-insulating sleeve, which effectively prevents the electrolyte 5 from leaking from the gap between the terminal post 3 and the top cover 2, so that it can adapt to temperature changes and mechanical vibration, and ensure stable sealing performance during long-term use. The combination of the annular sealing groove 715 and the sealing rib, together with other sealing designs of the heat-insulating sleeve, forms a multi-seal mechanism, which significantly improves the overall sealing performance and reliability of the battery.

[0042] One end of the valve 81 is provided with an elastic sealing layer, which is tightly fitted to the outer wall of the electrode post 3. The thickness of the elastic sealing layer is between 0.5mm and 2mm. The elastic sealing layer can tightly fit the outer wall of the electrode post 3, effectively filling the tiny gap between the electrode post 3 and the valve 81, and preventing the electrolyte 5 from leaking. The outer wall of the electrode post 3 is coated with an anti-corrosion coating. Specifically, the anti-corrosion coating is an epoxy resin coating or a polyurethane coating, and the thickness of the anti-corrosion coating is 0.1-0.5mm. Both epoxy resin coating and polyurethane coating have excellent chemical stability and can effectively resist the corrosion of the electrode post 3 by the corrosive media in the electrolyte 5. Epoxy resin and polyurethane coatings have extremely high adhesion to metal surfaces and can form a uniform and dense protective layer on the surface of the electrode post 3, which is not easy to peel off. At the same time, the coating thickness of 0.1-0.5mm can form a sufficient protective layer on the surface of the electrode post 3 to effectively resist the penetration of corrosive media, without significantly increasing the size of the electrode post 3, ensuring the convenience of assembly.

[0043] A method for sealing a storage battery with plastic, characterized by the following steps:

[0044] S1: Fix the heat shrink sleeve 71 inside the through hole 6, so that the limiting part 712 of the heat shrink sleeve 71 fits against the inner wall of the through hole 6. At the same time, install the sealing ring 72 between the horizontal part 714 of the heat shrink sleeve 71 and the top cover 2, so that the annular sealing rib 721 of the sealing ring 72 is embedded in the annular sealing groove 715 of the heat shrink sleeve 71. Since the limiting part 712 of the heat shrink sleeve 71 fits tightly against the inner wall of the through hole 6, and the annular sealing rib 721 of the sealing ring 72 is embedded in the annular sealing groove 715 of the heat shrink sleeve 71, a double sealing structure is formed, which effectively prevents the electrolyte 5 from leaking from the gap between the terminal post 3 and the top cover 2, and significantly improves the sealing performance of the battery.

[0045] S2: Fix the clamping block 8 to the pole post 3 so that the pole post 3 passes through the valve 81 of the clamping block 8. The valve 81 abuts against the outer wall of the pole post 3 and contacts the outer wall of the rubber ball 10. When the pole post 3 passes through the valve 81 of the clamping block 8, the valve 81 abuts against the outer wall of the pole post 3 and contacts the outer wall of the rubber ball 10, forming a pre-seal, which provides a preliminary sealing guarantee before the glue is filled, further enhancing the overall sealing reliability.

[0046] S3: Insert the pole 3 into the heat shrink sleeve 71. The pole 3 and the heat shrink sleeve 71 are fixed by the threaded connection between the pole 3 and the heat shrink sleeve 71. At the same time, the clamping block 8 is driven into the through hole 6. The spike 711 on the top of the heat shrink sleeve 71 pierces the protective film of the rubber ball 10, allowing the glue to flow out and fill the cavity 9 between the clamping block 8 and the heat shrink sleeve 71. After the spike 711 on the top of the heat shrink sleeve 71 pierces the protective film of the rubber ball 10, the glue flows out and fills the cavity 9 between the clamping block 8 and the heat shrink sleeve 71. After the glue cures, it further enhances the sealing effect and can adapt to the small displacement and thermal expansion and contraction of the pole 3, ensuring long-term stable sealing performance.

[0047] S4: After completing the threaded connection, check whether the connection between the terminal post 3 and the heat shrink sleeve 71 is firm, and whether the glue completely fills the cavity 9. Apply sealant to the top and bottom surfaces of the top cover 2 to complete the sealing process of the battery.

[0048] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A battery, characterized by: The application relates to a battery, which comprises a shell (1), an upper cover (2) and a pole (3), the shell (1) is internally provided with a polar plate (4) and electrolyte (5), the upper cover (2) is provided with a through hole (6) for accommodating the pole (3) to pass through, a sealing assembly (7) is arranged between the pole (3) and the through hole (6), the sealing assembly (7) comprises a heat-shrink sleeve (71) sleeved on the pole (3) and a sealing ring (72) arranged between the heat-shrink sleeve (71) and the upper cover (2), a pressing block (8) is further arranged in the through hole (6), the pressing block (8) is provided with a plurality of valves (81) which are pressed against each other, when the pole (3) passes through the pressing block (8), the plurality of valves (81) are pressed against the outer wall of the pole (3) and are in contact with the heat-shrink sleeve (71), and a cavity (9) for accommodating glue is formed between the pressing block (8) and the heat-shrink sleeve (71). The bottom of the pressing block (8) is provided with a glue ball (10), the glue ball (10) comprises a protective film and glue, the top surface of the heat-shrink sleeve (71) is provided with a thorn (711), when the pressing block (8) and the heat-shrink sleeve (71) are both located in the through hole (6), the thorn (711) can pierce the protective film, so that the glue flows out and is filled in the cavity (9) between the pressing block (8) and the heat-shrink sleeve (71). A repairing glue block (11) is arranged on the side wall of the through hole (6), the repairing glue block (11) is internally provided with repairing glue (1012), the pressing block (8) is provided with a pressing assembly (12), the pressing assembly (12) comprises a pressing block (121) and a thorn block (122), the pressing block (8) is provided with a through groove (82) for accommodating the pressing block (121) to be embedded, one end of the thorn block (122) is fixed with the pressing block (121), and the other end of the thorn block (122) is arranged towards the repairing glue block (11).

2. A battery as claimed in claim 1, characterised in that: The glue ball (10) is internally provided with a third glue block (101), the third glue block (101) is composed of an elastic wrapping film (1011) and repairing glue (1012), the elastic wrapping film (1011) is made of thermoplastic elastomer, the repairing glue (1012) is thixotropic silicone which is in a solid state under an unpressing state and presents fluidity after being pressed, and the volume of the third glue block (101) is smaller than the internal space of the glue ball (10).

3. A battery as claimed in claim 1, wherein: The valve (81) is provided with four valves, when the pole (3) passes through the pressing block (8), the four valves (81) are all pressed against the outer wall of the protective film, and the volume of the glue ball (10) is larger than the volume of the cavity (9).

4. A battery as claimed in claim 1, wherein: The heat shrink sleeve comprises a limiting portion (712), a vertical portion (713) and a horizontal portion (714), two ends of the vertical portion (713) are connected with the limiting portion (712) and the horizontal portion (714) respectively, the cross section of the limiting portion (712) is in the shape of an inverted trapezoid, the outer wall of the limiting portion is in close contact with the inner wall of the through hole (6), the outer diameter of the vertical portion (713) is the same as the diameter of the through hole (6), the outer diameter of the horizontal portion (714) is larger than the diameter of the through hole (6), and the distance between the top surface of the horizontal portion (714) and the upper cover (2) is smaller than the thickness of the sealing ring (72) when the heat shrink sleeve is located in the through hole (6).

5. A battery as claimed in claim 4, wherein: An annular sealing groove (715) is arranged on the outer side of the horizontal portion (714), and the inner side of the sealing ring (72) is provided with an annular sealing rib (721) matched with the annular sealing groove (715), and when the heat shrink sleeve is installed in the through hole (6), the annular sealing rib (721) is embedded in the annular sealing groove (715).

6. A battery as claimed in claim 1, wherein: The material of the abutting block (8) is elastic plastic, the outer side of the abutting block (8) is provided with a plurality of positioning grooves uniformly distributed along the circumference thereof, the inner wall of the through hole (6) is provided with a positioning rib matched with the positioning grooves, and the abutting block (8) is fixed with the through hole (6) by embedding the positioning rib into the positioning groove.

7. A battery as claimed in claim 2, wherein: One end of the valve (81) is provided with an elastic sealing layer, the elastic sealing layer is in close contact with the outer wall of the pole (3), and the thickness of the elastic sealing layer is between 0.5mm and 2mm.

8. A battery as in claim 1, wherein: The outer wall of the pole (3) is coated with a layer of anticorrosive coating, the anticorrosive coating is an epoxy resin coating or a polyurethane coating, and the thickness of the anticorrosive coating is 0.1-0.5mm.

9. A method of sealing a battery according to any one of claims 1 to 8, wherein: The method comprises the following steps: S1: fixing the heat shrink sleeve (71) in the through hole (6) so that the limiting portion (712) of the heat shrink sleeve (71) is in close contact with the inner wall of the through hole (6), and installing the sealing ring (72) between the horizontal portion (714) of the heat shrink sleeve (71) and the upper cover (2) so that the annular sealing rib (721) of the sealing ring (72) is embedded in the annular sealing groove (715) of the heat shrink sleeve (71); S2: fixing the abutting block (8) with the pole (3) so that the pole (3) passes through the valve (81) of the abutting block (8), the valve (81) abuts against the outer wall of the pole (3) and contacts the outer wall of the rubber ball (10); S3: inserting the pole (3) into the heat shrink sleeve (71), fixing the pole (3) with the heat shrink sleeve (71) through the threaded connection between the pole (3) and the heat shrink sleeve (71), and driving the abutting block (8) into the through hole (6) at the same time, the sharp (711) at the top of the heat shrink sleeve (71) pierces the protective film of the rubber ball (10), and the glue flows out and fills the cavity (9) between the abutting block (8) and the heat shrink sleeve (71); S4: after the threaded connection is completed, checking whether the connection between the pole (3) and the heat shrink sleeve (71) is firm and whether the glue completely fills the cavity (9), and coating sealing glue on the top surface and the bottom surface of the upper cover (2) to complete the glue sealing process of the storage battery.

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