A leak-proof lithium manganese button battery

Abstract

This utility model relates to the field of lithium manganese battery technology and discloses a leak-proof lithium manganese button battery, including a battery casing, a sealing cap, an annular sealing strip, and a sealing block. The battery casing is a shell structure, and the sealing cap fits over the open end of the battery casing. A first sealing groove is provided on the side of the sealing cap facing the battery casing. A fixing protrusion is integrally formed on the inner sidewall of the battery casing. The annular sealing strip is fixed inside the battery casing and located below the fixing protrusion. A second sealing groove is provided within the annular sealing strip. The sealing block is located below the sealing cap, and a sealing block with the same diameter as the annular sealing strip is fixed to the bottom end of the sealing block. A sealing ring is fixed to the sidewall of the sealing block, and the sealing ring is adapted to the second sealing groove. This utility model improves the overall sealing performance of the battery by setting a tight fit between the sealing ring and the second sealing groove, combining the initial sealing with the annular sealing strip, and then forming a secondary seal with the fixing protrusion and the first sealing groove.

Description

Technical Field

[0001] This utility model relates to the field of lithium manganese battery technology, and in particular to a leak-proof lithium manganese button battery. Background Technology

[0002] Lithium-manganese button batteries are a type of small primary battery that uses metallic lithium as the negative electrode and manganese dioxide as the positive electrode material. They offer advantages such as small size, high energy density, stable voltage platform, and long storage life, and are widely used in low-power electronic products such as electronic tags, computer motherboards, remote controllers, and medical devices. These batteries typically employ a button structure, using a sealing ring and casing to seal and fix the electrolyte, ensuring performance stability during long-term storage and use.

[0003] An investigation revealed that a Chinese utility model patent (publication number: CN220544072U) discloses a button-type leak-proof lithium manganese battery. Although the patent incorporates a sealing sleeve into the casing, injects electrolyte from above the sealing sleeve, and then seals it with a T-shaped plug at the bottom of the casing, effectively preventing electrolyte leakage by completely enclosing the electrolyte in the sealing sleeve, the sealing structure relies solely on the sealing sleeve and T-shaped plug. This relatively simple sealing structure significantly reduces the reliability of the seal. When affected by external pressure, temperature changes, and other factors, the seal is more likely to fail, leading to electrolyte leakage. This results in the loss of chemical substances inside the battery, causing a rapid decline in battery performance. Utility Model Content

[0004] Given that the existing sealing methods rely solely on sealing sleeves and T-shaped plugs, resulting in a relatively simple sealing structure and significantly reduced sealing reliability, the seals are more prone to failure when subjected to external pressure, temperature changes, and other factors. This leads to electrolyte leakage, causing the loss of internal chemical substances and a rapid decline in battery performance. Therefore, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A leak-proof lithium manganese button battery includes a battery casing, a sealing cover, an annular sealing strip, and a sealing block. The battery casing is a shell structure. The sealing cover covers the open end of the battery casing. The sealing cover has a first sealing groove on one side facing the battery casing. A fixing protrusion is integrally formed on the inner side wall of the battery casing. The annular sealing strip is fixed inside the battery casing and located below the fixing protrusion. A second sealing groove is provided inside the annular sealing strip. The sealing block is located below the sealing cover. A sealing block is fixed at the bottom end of the sealing block. The diameter of the sealing block is the same as that of the annular sealing strip. A sealing ring is fixed on the side wall of the sealing block. The sealing ring is adapted to the second sealing groove.

[0006] In a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, the fixing protrusion corresponds to the first sealing groove.

[0007] As a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, the first sealing groove is distributed in a ring along the edge of the sealing cover, the cross-section of the first sealing groove is rectangular, and the sealing block is a disc-shaped structure.

[0008] In a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, the sealing ring and the sealing block are integrally fixedly connected.

[0009] As a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, wherein the annular sealing strip is interference-fitted with the inner wall of the battery casing.

[0010] As a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, wherein: the top of the battery casing is fixedly installed with posts at equal intervals, the bottom of the sealing cover is provided with a slot corresponding to the post, the inside of the sealing cover is provided with a sliding groove, and the sliding groove and the slot are connected.

[0011] In a preferred embodiment of the leak-proof lithium manganese button battery of this utility model, a spring is fixedly installed inside the slide groove, a limiting post is fixedly installed at the free end of the spring, the limiting post and the slide groove are slidably connected, and the end of the limiting post is arc-shaped.

[0012] The beneficial effects of this utility model are: 1. By setting a tight fit between the sealing ring and the second sealing groove, and combining the annular sealing strip for initial sealing, and then the fixing protrusion and the first sealing groove to form a secondary seal, the overall sealing performance of the battery is improved. This can effectively prevent electrolyte leakage, avoid the performance degradation of the battery due to liquid loss, and also prevent external air and moisture from entering the battery, preventing oxidation, corrosion and other problems, thus extending the battery's service life. 2. When the sealing cap is closed, the insert and slot cooperate to achieve initial positioning. At the same time, the insert squeezes the limiting post and compresses the spring. After the insert is fully inserted, the limiting post uses the spring force to squeeze and fix the insert, which enhances the connection between the sealing cap and the battery shell and prevents them from loosening. It does not require additional complex fixing parts, is easy to operate, and can also help maintain the stability of the sealing structure and ensure the overall performance of the battery. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the fixing protrusion and annular sealing strip of this utility model; Figure 4 This is a schematic diagram of the sealing cap of this utility model; Figure 5 This is a schematic diagram of the sealing block of this utility model; Figure 6 for Figure 4 A magnified view of a portion of point A; Figure 7 This is a schematic diagram of the insert post of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Battery casing; 2. Sealing cover; 3. First sealing groove; 4. Fixing protrusion; 5. Annular sealing strip; 6. Second sealing groove; 7. Sealing block; 8. Sealing block; 9. Sealing ring; 10. Insert post; 11. Slot; 12. Slide groove; 13. Limiting post; 14. Spring. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Example Refer to attached figure Figure 1 - Appendix Figure 7 This utility model provides a leak-proof lithium manganese button battery, including a battery casing 1, a sealing cover 2, an annular sealing strip 5, and a sealing block 7. The battery casing 1 serves as the basic supporting component of the whole and is in the shape of a shell with a certain depth. The sealing cover 2 fits onto the open end of the battery casing 1, and the two together constitute the external closed structure of the battery. A first sealing groove 3 is opened on one end face of the sealing cover 2 facing the battery casing 1 and is distributed around the edge of the sealing cover 2 to accommodate sealing components to enhance sealing performance. A fixing protrusion 4 is integrally formed on the inner side wall of the battery casing 1. The fixing protrusion 4 is adapted to the first sealing groove 3. The annular sealing strip 5 is fixedly installed inside the battery casing 1, and a second sealing groove 6 is provided in the annular sealing strip 5 below the fixing protrusion 4.

[0017] The sealing block 7 is located below the sealing cover 2. The sealing block 7 can further fill the space inside the battery casing 1. The bottom end of the sealing block 7 is fixedly installed with a sealing block 8. The diameter of the sealing block 8 is the same as that of the annular sealing strip 5, which seals the inside of the battery. A sealing ring 9 is fixedly installed on the side wall of the sealing block 8. The sealing ring 9 is compatible with the second sealing groove 6. The sealing ring 9, through its own elastic deformation, tightly fits the inside of the second sealing groove 6, further enhancing the overall sealing performance, preventing the leakage of electrolyte and other substances inside the battery, and preventing external air and moisture from entering the battery, thus ensuring the normal operation and service life of the battery.

[0018] The top of the battery casing 1 is fixedly installed with equidistant insertion posts 10. The bottom of the sealing cover 2 is provided with a slot 11 corresponding to the insertion posts 10. The inside of the sealing cover 2 is provided with a sliding groove 12, which is connected to the slot 11. A spring 14 is fixedly installed inside the sliding groove 12. A limiting post 13 is fixedly installed at the free end of the spring 14. The limiting post 13 is slidably connected to the sliding groove 12. The end of the limiting post 13 is arc-shaped.

[0019] During use, the sealing block 7 is first moved closer to the annular sealing strip 5, until the sealing ring 9 is precisely embedded in the second sealing groove 6. The sealing ring 9, with its own elasticity, tightly fits the inner wall of the second sealing groove 6, and performs an initial seal in conjunction with the annular sealing strip 5. Then, when the sealing cover 2 is placed on the opening end of the battery casing 1, the fixing protrusion 4 is embedded in the first sealing groove 3 for positioning. The cooperation between the first sealing groove 3 and the fixing protrusion 4 forms a sealing structure between the battery casing 1 and the sealing cover 2, which not only prevents the leakage of electrolyte inside the battery, but also isolates external air and moisture from entering, thereby ensuring the stable and long-lasting operation of the lithium manganese button battery. When the sealing cover 2 is placed on the battery casing 1, the insertion post 10 is inserted into the slot 11. At the same time, the insertion post 10 presses the limiting post 13, causing the limiting post 13 to compress the spring 14. When the insertion post 10 is fully inserted, the limiting post 13 is pressed and fixed by the elastic force of the spring 14, thereby making the connection between the sealing cover 2 and the battery casing 1 more stable.

[0020] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A leak-proof lithium manganese button battery, characterized in that: The battery casing includes a battery shell (1), a sealing cover (2), an annular sealing strip (5), and a sealing block (7). The battery shell (1) is a shell structure. The sealing cover (2) covers the opening end of the battery shell (1). The sealing cover (2) has a first sealing groove (3) on one side of the battery shell (1). The inner sidewall of the battery shell (1) is integrally formed with a fixing protrusion (4). The annular sealing strip (5) is fixed inside the battery shell (1) and located below the fixing protrusion (4). The annular sealing strip (5) has a second sealing groove (6). The sealing block (7) is located below the sealing cover (2). The bottom end of the sealing block (7) is fixed with a sealing block (8). The diameter of the sealing block (8) is the same as that of the annular sealing strip (5). The sidewall of the sealing block (8) is fixed with a sealing ring (9). The sealing ring (9) is adapted to the second sealing groove (6).

2. The leak-proof lithium manganese button battery according to claim 1, characterized in that: The fixed protrusion (4) corresponds to the first sealing groove (3).

3. The leak-proof lithium manganese button battery according to claim 2, characterized in that: The first sealing groove (3) is distributed in a ring along the edge of the sealing cover (2), the cross section of the first sealing groove (3) is rectangular, and the sealing block (8) is a disc-shaped structure.

4. The leak-proof lithium manganese button battery according to claim 1, characterized in that: The sealing ring (9) is integrally and fixedly connected to the sealing block (8).

5. The leak-proof lithium manganese button battery according to claim 1, characterized in that: The annular sealing strip (5) is interference-fitted with the inner wall of the battery casing (1).

6. The leak-proof lithium manganese button battery according to claim 1, characterized in that: The top of the battery casing (1) is fixedly installed with posts (10) at equal intervals. The bottom of the sealing cover (2) and the position corresponding to the posts (10) are provided with slots (11). The inside of the sealing cover (2) is provided with a sliding groove (12). The sliding groove (12) and the slot (11) are connected.

7. The leak-proof lithium manganese button battery according to claim 6, characterized in that: A spring (14) is fixedly installed inside the slide groove (12), and a limiting post (13) is fixedly installed at the free end of the spring (14). The limiting post (13) and the slide groove (12) are slidably connected, and the end of the limiting post (13) is arc-shaped.

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