Storage battery sealing assembly and sealed storage battery

Abstract

The utility model discloses a storage battery sealing assembly and a sealed storage battery. The storage battery sealing assembly comprises an upper cover, an annular boss, an electrode pile head and a pile head insulating part, wherein the upper cover is provided with a through hole; the annular boss is fixedly arranged on the surface of the upper cover and surrounds the through hole; the electrode pile head penetrates through the through hole, and a groove is formed in the outer side of the electrode pile head; and the inner side of the pile head insulating part is embedded into the groove and is hermetically connected, and the outer side is hermetically connected with the annular boss. The grooves are formed in the outer sides of the electrode pile heads, so that the pile head insulating parts are engaged after being embedded, the vertical permeation path of electrolyte is blocked, the acid leakage phenomenon is avoided fundamentally, and meanwhile, the liquid leakage risk is greatly reduced. The sealing contact surface is changed from the side surface of the pile head to the horizontal direction of the upper cover surface, and the annular boss is used for increasing the sealing area and dispersing stress. Through structural optimization and multi-sealing collaborative design of the sealing surface, the industrial problems of liquid leakage, acid leakage and the like caused by lateral sealing failure of a traditional storage battery are systematically solved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage system technology, specifically to a battery sealing component and a sealed battery. Background Technology

[0002] Currently, in traditional energy storage devices such as lead-acid batteries, the positive and negative terminals are usually passed through pre-drilled holes in the top cover, and the sides of the terminals that contact the top cover are sealed with adhesive (such as epoxy resin or silicone) to prevent leakage.

[0003] However, this structure has significant drawbacks in practical applications: because the sealing surface is located on the side of the terminal head, it is subject to long-term corrosion from the electrolyte, temperature changes, and mechanical vibrations. This causes the colloid to age, crack, or peel off from the metal terminal head, leading to seal failure. When the electrolyte (containing sulfuric acid) seeps out from the gaps, it reacts with the terminal head metal (lead or lead alloy) to form compounds such as lead sulfate, creating an "acid creep" phenomenon (white / blue-green crystals), further damaging the sealing structure. The leaked electrolyte not only corrodes the terminal head and connecting components (such as copper cables), increasing contact resistance and reducing conductivity, but also contaminates the battery casing and surrounding equipment, even causing short circuits and increased self-discharge. Existing sealing methods require regular cleaning of corrosion and reapplying of the sealant, which is complex and difficult to completely resolve. Furthermore, replacing the terminal head or the entire battery after seal failure is costly, especially in vehicle-mounted and industrial energy storage scenarios, where downtime for maintenance will result in additional economic losses.

[0004] In summary, the existing pile head lateral sealing structure has significant shortcomings in terms of long-term reliability, corrosion resistance, and ease of maintenance, and a new sealing solution is urgently needed to solve core problems such as leakage and acid creep. Utility Model Content

[0005] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a battery sealing assembly and a sealed battery to solve the technical problems of insufficient long-term reliability, corrosion resistance and maintenance convenience in the prior art.

[0006] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a battery sealing assembly, including a top cover, an annular boss, electrode terminals, and terminal insulation:

[0008] The top cover has a through hole;

[0009] An annular boss is fixed to the surface of the upper cover and surrounds the through hole;

[0010] An electrode head, the electrode head passing through the through hole, and the outer side of the electrode head having a groove;

[0011] The pile head insulation component has its inner side embedded in the groove and sealed to the groove, and its outer side sealed to the annular boss.

[0012] In some embodiments of this application, the annular boss is spaced apart from the electrode post, the post insulating member is covered on the upper cover and located between the electrode post and the annular boss, the bottom surface of the post insulating member is connected to the upper cover, and the outer surface is connected to the inner surface of the annular boss.

[0013] In some embodiments of this application, the height of the pile head insulation member is less than or equal to the height of the annular boss.

[0014] In some embodiments of this application, the annular boss is spaced apart from the electrode post, the post head insulation is covered on the upper cover and the annular boss, the outer side of the post head insulation has a stepped structure, and the stepped structure is connected to the upper cover, the inner side of the annular boss, and the top surface of the annular boss respectively.

[0015] In some embodiments of this application, the height of the pile head insulation member is greater than the height of the annular boss.

[0016] In some embodiments of this application, an adhesive is also included, which is applied to the surface of the top cover and the annular boss facing the pile head insulator.

[0017] In some embodiments of this application, the annular boss is covered on the upper cover, and the pile head insulation member is covered on the annular boss and connected to the annular boss.

[0018] In some embodiments of this application, an adhesive is also included, which is applied to the surface of the annular boss facing the pile head insulation.

[0019] In some embodiments of this application, a welding portion is also included, which is located between the upper cover and the annular boss.

[0020] Secondly, this application also provides a sealed storage battery, including a positive terminal, a negative terminal, and a storage battery sealing assembly as described in any embodiment of the first aspect, wherein the electrode terminals of the storage battery sealing assembly are sleeved on the outside of the positive terminal and the negative terminal.

[0021] Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include:

[0022] This application addresses the issue of electrolyte leakage and acid creep by creating grooves on the outer side of the electrode terminals, allowing the terminal insulation to be embedded and interlocked, thus blocking the vertical penetration path of the electrolyte and preventing acid creep at its source. It also significantly reduces the risk of leakage. The sealing contact surface is changed from the side of the terminal to the horizontal surface of the top cover, utilizing an annular boss to increase the sealing area and distribute stress. Through optimized sealing surface structure and a multi-seal collaborative design, this application systematically solves the industry pain points of traditional batteries, such as leakage and acid creep caused by lateral seal failure. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the embodiments will be briefly described below:

[0024] Figure 1 This is a schematic diagram of the structure of a sealed storage battery provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a battery sealing assembly provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of another battery sealing assembly provided in an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of another battery sealing assembly provided in the embodiments of this application.

[0028] Figure label:

[0029] 1-Battery sealing assembly, 11-Top cover, 12-Annular boss, 13-Electrode terminal, 14-Terminal terminal insulation, 2-Positive terminal post. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] Those skilled in the art will understand that, in this specification, the term "comprising" is an open-ended expression, meaning that the stated feature is present but other features are excluded. Directional terms such as "upper," "lower," "left," and "right" refer to exemplary directions based on the accompanying drawings. Features specified as "first" or "second" implicitly include one or more of that feature. Singular expressions can also be used in plural forms. "Multiple" means two or more. The terms "installed," "connected," and "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection via an intermediate medium, and it can be a connection within two components. Furthermore, "linked" can include wireless connections.

[0032] The purpose of this application is to overcome the above-mentioned technical deficiencies and propose a battery sealing assembly 1 and a sealed battery to solve the technical problems of insufficient long-term reliability, corrosion resistance and maintenance convenience in the prior art.

[0033] To achieve the above-mentioned technical objectives, this application adopts the following technical solution:

[0034] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a sealed storage battery provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a battery sealing assembly provided in an embodiment of this application; Figure 2 yes Figure 1 Enlarged schematic diagram of point P in the middle.

[0035] In a first aspect, this application provides a battery sealing assembly 1, including a top cover 11, an annular boss 12, an electrode terminal 13, and a terminal insulation member 14.

[0036] The upper cover 11 has a through hole for the electrode head 13 to pass through.

[0037] The annular boss 12 is fixed to the surface of the upper cover 11 and surrounds the through hole, providing support for the sealing structure.

[0038] The electrode head 13 passes through the through hole, and the outer side of the electrode head 13 has a groove for embedding the head insulation member 14.

[0039] The inner side of the pile head insulating component 14 is embedded in the groove and sealed to the groove, while the outer side is sealed to the annular boss 12, forming a sealed structure.

[0040] This application addresses the issue of electrolyte leakage and acid creep by creating a groove on the outer side of the electrode terminal 13, allowing the terminal insulation 14 to be embedded and interlocked, thus blocking the vertical penetration path of the electrolyte and preventing acid creep at its source. It also significantly reduces the risk of leakage. The sealing contact surface is changed from the side of the terminal to the horizontal direction of the top cover 11, and the annular boss 12 is used to increase the sealing area and distribute stress. Through optimized sealing surface structure and multi-seal collaborative design, this application systematically solves the industry pain points of traditional batteries, such as leakage and acid creep caused by lateral seal failure.

[0041] In some embodiments of this application, the annular boss 12 is spaced apart from the electrode post 13, the post insulating member 14 is covered on the upper cover 11 and located between the electrode post 13 and the annular boss 12, the bottom surface of the post insulating member 14 is connected to the upper cover 11, and the outer side surface is connected to the inner side surface of the annular boss 12.

[0042] The annular boss 12 is spaced apart from the electrode post 13, leaving a certain space around the electrode post 13 for placing the post insulating component 14. The bottom surface of the post insulating component 14 is connected to the upper cover 11, which supports the post insulating component 14. The outer surface of the post insulating component 14 is connected to the inner surface of the annular boss 12, and the inner surface of the post insulating component 14 is connected to the groove of the electrode post 13, thus fixing both ends horizontally and forming a sealed interface. This interface cuts off the gap between the electrode post 13 and the upper cover 11, preventing electrolyte from seeping through the gap. When the electrode post 13 passes through the through hole of the upper cover 11, the connection between the post insulating component 14 and the annular boss 12 provides a sealing effect, preventing electrolyte leakage.

[0043] The terminal insulator 14 covers the upper cover 11 and connects to the inner side of the annular boss 12. This structural design increases overall stability and reduces seal failure caused by vibration and other factors. Since the terminal insulator 14 is located between the electrode terminal 13 and the annular boss 12, it forms an effective sealing barrier, further improving sealing performance and reducing the possibility of leakage. The design of the terminal insulator 14 makes installation and replacement easier, reducing maintenance complexity and cost. Due to the effective sealing of the terminal insulator 14, electrolyte rises along the outer wall of the electrode terminal 13, thus avoiding acid creep. By optimizing the sealing structure, the risk of electrolyte leakage is reduced, improving the safety of the battery.

[0044] In some embodiments of this application, the height of the pile head insulation member 14 is less than or equal to the height of the annular boss 12.

[0045] Since the height of the pile head insulating member 14 does not exceed that of the annular boss 12, this design allows the pile head insulating member 14 to be fully embedded inside the annular boss 12 and to form a tight contact with the top cover 11. Therefore, when a sealing force is applied, it can be ensured that the force is evenly distributed and that the seal will not be uneven or fail due to height differences.

[0046] The annular boss 12 has a certain volume of space, which facilitates glue application and effectively prevents problems such as glue overflow and uneven glue application. Furthermore, the glue sealing surface has two surfaces: the bottom surface and the outer surface of the pile head insulating component 14, which face the inner surfaces of the upper cover 11 and the annular boss 12 respectively, increasing strength. Due to the consistent height of the pile head insulating component 14 and the annular boss 12, alignment is easier during installation, improving installation accuracy.

[0047] like Figure 3 As shown, Figure 3 This is a schematic diagram of another battery sealing assembly provided in an embodiment of this application.

[0048] In some embodiments of this application, the annular boss 12 and the electrode post 13 are spaced apart, the post insulating member 14 is covered on the upper cover 11 and the annular boss 12, the outer side of the post insulating member 14 has a stepped structure, and the stepped structure is connected to the upper cover 11, the inner side of the annular boss 12 and the top surface of the annular boss 12 respectively.

[0049] The annular boss 12 is spaced apart from the electrode post 13, providing installation space for the post head insulation component 14. The post head insulation component 14 covers the upper cover 11 and the annular boss 12, serving to isolate the electrode post 13 from the upper cover 11 and simultaneously forming a seal. The outer side of the post head insulation component 14 has a stepped structure, which allows for multiple contacts and seals with the upper cover 11, the inner surface of the annular boss 12, and the top surface of the annular boss 12. The bottom of the stepped structure connects to the upper cover 11, the middle section connects to the inner surface of the annular boss 12, and the top connects to the top surface of the annular boss 12, thus forming a multi-layered, all-around sealing system.

[0050] The stepped structure provides multiple sealing points, further extending the electrolyte escape path and greatly enhancing the sealing effect, reducing the possibility of leakage. The stepped structure effectively blocks the electrolyte's penetration path, preventing acid creep from occurring on multiple levels.

[0051] In some embodiments of this application, the height of the pile head insulation member 14 is greater than the height of the annular boss 12.

[0052] The height of the pile head insulation component 14 is designed to be greater than the height of the annular boss 12, so that during installation, the pile head insulation component 14 can completely cover the annular boss 12 and form an additional sealing layer on top of it. This enhances the overall sealing performance and reduces the risk of leakage.

[0053] Once the terminal insulator 14 is installed in place, the portion of its top extending beyond the annular boss 12 provides additional sealing protection, preventing electrolyte from seeping in from the top. This additional sealing layer further prevents electrolyte leakage, improving battery safety. The enhanced sealing performance reduces the frequency of maintenance and replacement, thus extending battery life. The design of the terminal insulator 14 extending beyond the annular boss 12 effectively prevents electrolyte from seeping in from the top, avoiding acid creep.

[0054] In some embodiments of this application, an adhesive is also included, which is applied to the surfaces of the top cover 11 and the annular boss 12 facing the pile head insulator 14.

[0055] Adhesive is applied to the surfaces of the top cover 11 and the annular boss 12 facing the pile head insulator 14. When the pile head insulator 14 is installed in place, the adhesive bonds the corresponding surfaces of the pile head insulator 14 to the inner planes of the top cover 11 and the annular boss 12. After the adhesive cures, a strong adhesive layer is formed, ensuring reliable fixation and sealing between the pile head insulator 14 and the annular boss 12 of the top cover 11.

[0056] The use of adhesive increases the fixing force between the pile head insulator 14 and the annular boss 12 of the top cover 11, ensuring the stability of the sealing assembly. After curing, the adhesive effectively fills minute gaps, improving sealing performance and reducing the risk of electrolyte leakage. The adhesive also absorbs and disperses vibration energy, reducing loosening of the sealing assembly due to vibration.

[0057] like Figure 4 As shown, Figure 4 This is a schematic diagram of another battery sealing assembly provided in the embodiments of this application.

[0058] In some embodiments of this application, the annular boss 12 is covered on the upper cover 11, and the pile head insulation member 14 is covered on the annular boss 12 and connected to the annular boss 12.

[0059] The annular boss 12, as a structural layer, is directly applied to a specific area of ​​the upper cover 11 and is typically attached to the upper cover 11 by welding, threading, or other fixing methods. The post head insulation member 14 is placed on the annular boss 12 and fixed to the annular boss 12 by pressing, bonding, or other simple connection methods. This structure allows the electrode post head 13 to pass through the through hole of the upper cover 11, with its outer groove engaging with the post head insulation member 14, while the other side of the post head insulation member 14 is tightly connected to the annular boss 12, forming a seal.

[0060] The design of the annular boss 12 and the post head insulation component 14 is simple, easy to manufacture and install, and reduces complex parts and assembly steps. Due to the simple structure, the required material and processing costs are lower, improving cost-effectiveness. A simple structure generally means higher reliability because it reduces potential points of failure.

[0061] In some embodiments of this application, an adhesive is also included, which is applied to the surface of the annular boss 12 facing the pile head insulation member 14.

[0062] An adhesive is used as an auxiliary sealing material and is applied to the surface of the annular boss 12 facing the head insulator 14. When the head insulator 14 is placed over the annular boss 12, the adhesive fills the tiny gaps between them, serving to bond and seal. After curing, the adhesive provides additional sealing performance, ensuring that electrolyte does not leak from the sealing interface.

[0063] The addition of adhesives further enhances sealing performance and reduces the possibility of leakage. Due to manufacturing tolerances or minor deviations during assembly, the adhesive can fill these gaps, ensuring the integrity of the seal. Using adhesives simplifies assembly steps, eliminating the need for complex fixing mechanisms and reducing assembly difficulty.

[0064] In some embodiments of this application, a welding portion is also included, which is located between the upper cover 11 and the annular boss 12.

[0065] The welded part can be formed by melting the upper cover 11 or the annular boss 12, or it can be formed by melting the upper cover 11 and the annular boss 12 with additional brazing filler metal. The weld is sealed and welded to the annular boss 12, which effectively increases the weld thickness, prevents burn-through, and ensures the structural strength of the upper cover 11.

[0066] The process employs a combined "adhesive application + welding" technique. The adhesive fills the microscopic gap between the pile head insulation component 14 and the annular boss 12, while the welding achieves molecular layer bonding through hot melting or ultrasonic welding, thus balancing short-term sealing strength with long-term anti-aging performance.

[0067] The insulating parts and the top cover 11 can be separated and replaced, which greatly reduces maintenance costs. In addition, the standardized structure of the annular boss 12 is compatible with automated welding processes, which improves production efficiency.

[0068] The pile head insulation component 14 can be made of corrosion-resistant fluororubber or high and low temperature resistant silicone rubber to meet the diverse working conditions of new energy vehicle power batteries, industrial energy storage systems and other applications.

[0069] Secondly, this application also provides a sealed storage battery, including a positive terminal 2, a negative terminal, and a storage battery sealing assembly 1 as described in any embodiment of the first aspect, wherein the electrode terminals 13 of the storage battery sealing assembly 1 are sleeved on the outside of the positive terminal 2 and the negative terminal.

[0070] The sealed battery provided in this application includes a positive terminal 2 and a negative terminal, which are the basic components of the battery and are respectively connected to the positive and negative terminals. The battery sealing assembly 1 is designed according to an embodiment of the first aspect and includes a top cover 11, an annular boss 12, electrode terminals 13, and terminal insulators 14. The electrode terminals 13 are sleeved on the outside of the positive and negative terminals and form a sealed connection with the top cover 11 through the terminal insulators 14 and the annular boss 12, thereby achieving sealing and protection of the electrode terminals.

[0071] By using a terminal sealing assembly, the positive and negative terminals of the battery are effectively sealed, preventing electrolyte leakage and reducing maintenance costs. The sealed design reduces the risk of electrolyte contact with the external environment, improving the battery's safety.

[0072] Compared with the prior art, the beneficial technical effects of the technical solution provided in this application include:

[0073] This application addresses the issue of electrolyte leakage and acid creep by creating a groove on the outer side of the electrode terminal 13, allowing the terminal insulation 14 to be embedded and interlocked, thus blocking the vertical penetration path of the electrolyte and preventing acid creep at its source. It also significantly reduces the risk of leakage. The sealing contact surface is changed from the side of the terminal to the horizontal direction of the top cover 11, and the annular boss 12 is used to increase the sealing area and distribute stress. Through optimized sealing surface structure and multi-seal collaborative design, this application systematically solves the industry pain points of traditional batteries, such as leakage and acid creep caused by lateral seal failure.

[0074] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, processes, and procedures discussed in this application can be alternated, modified, rearranged, decomposed, combined, or deleted.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. A battery sealing assembly, characterized in that, include: The top cover has a through hole; An annular boss is fixed to the surface of the upper cover and surrounds the through hole; An electrode head, the electrode head passing through the through hole, and the outer side of the electrode head having a groove; The pile head insulation component has its inner side embedded in the groove and sealed to the groove, and its outer side sealed to the annular boss.

2. The battery sealing assembly according to claim 1, characterized in that, The annular boss is spaced apart from the electrode pile head. The pile head insulating member is covered on the upper cover and located between the electrode pile head and the annular boss. The bottom surface of the pile head insulating member is connected to the upper cover, and the outer surface is connected to the inner surface of the annular boss.

3. The battery sealing assembly according to claim 2, characterized in that, The height of the pile head insulation component is less than or equal to the height of the annular boss.

4. The battery sealing assembly according to claim 1, characterized in that, The annular boss is spaced apart from the electrode pile head. The pile head insulation member is covered on the upper cover and the annular boss. The outer side of the pile head insulation member has a stepped structure, which is connected to the upper cover, the inner side of the annular boss, and the top surface of the annular boss.

5. The battery sealing assembly according to claim 4, characterized in that, The height of the pile head insulation component is greater than the height of the annular boss.

6. The battery sealing assembly according to claim 2 or 4, characterized in that, It also includes an adhesive applied to the surface of the top cover and the annular boss facing the pile head insulator.

7. The battery sealing assembly according to claim 1, characterized in that, The annular boss is covered on the upper cover, and the pile head insulation member is covered on the annular boss and connected to the annular boss.

8. The battery sealing assembly according to claim 7, characterized in that, It also includes an adhesive applied to the surface of the annular boss facing the pile head insulation.

9. The battery sealing assembly according to claim 2, 4 or 7, characterized in that, It also includes a welding section located between the upper cover and the annular boss.

10. A sealed storage battery, characterized in that, It includes a positive terminal, a negative terminal, and a battery sealing assembly as described in any one of claims 1 to 9, wherein the electrode terminals of the battery sealing assembly are sleeved on the outside of the positive terminal and the negative terminal.

Images