Sealing structure for long-life liquid injection hole

Abstract

The utility model relates to the technical field of batteries, and discloses a sealing structure for a long-life liquid injection hole, which comprises a battery body, a liquid inlet hole is arranged in the battery body, a clamping hole is arranged in the battery body, an annular limiting groove is arranged at the top of the battery body, a limiting ring is fixedly connected in the battery body, and a sealing ring is arranged in the limiting ring. And a sealing cover is inserted into the annular limiting groove, a pressing block is fixedly connected to the bottom of the sealing cover, a connecting column is fixedly connected to the bottom of the pressing block, a clamping block matched with the clamping hole is fixedly connected to the bottom of the connecting column, and the sealing cover and the clamping block are both made of silicon rubber materials. The sealing structure for the long-life liquid injection hole has the advantages of being good in sealing effect and the like, and the problem that when a common liquid injection hole is used for injecting liquid into a lithium battery, liquid leakage possibly occurs due to corrosion of electrolyte after long-time use, and the battery is damaged is solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a sealing structure for a long-life liquid injection hole. Background Technology

[0002] Lithium-ion batteries are rechargeable batteries that use lithium ions as the positive electrode material. They have high energy density, long cycle life and low self-discharge rate, so they are widely used in mobile devices, power tools, electric vehicles and many other fields. During the production process, lithium batteries need to be filled with electrolyte, and the electrolyte filling hole is the location where the electrolyte enters the lithium battery.

[0003] Electrolytes are typically corrosive. When using ordinary filling holes to fill lithium batteries, leakage may occur after prolonged use due to electrolyte corrosion, leading to battery damage. Therefore, a long-life filling hole sealing structure is proposed to solve the aforementioned problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a long-life sealing structure for electrolyte injection holes, which has advantages such as good sealing effect. It solves the problem that when using ordinary electrolyte injection holes to inject electrolyte into lithium batteries, leakage may occur due to electrolyte corrosion after long-term use, leading to battery damage.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A sealing structure for a long-life liquid injection hole includes a battery body, an inlet hole and a locking hole inside the battery body, an annular limiting groove on the top of the battery body, a limiting ring fixedly connected inside the battery body, a sealing cover inserted into the annular limiting groove, a pressure block fixedly connected to the bottom of the sealing cover, a connecting post fixedly connected to the bottom of the pressure block, and a locking block adapted to the locking hole fixedly connected to the bottom of the connecting post. Both the sealing cover and the locking block are made of silicone rubber.

[0008] The beneficial effects of this utility model are: the inlet hole facilitates the delivery of electrolyte into the battery; the annular limiting groove can limit the sealing cover by the battery body; the locking block can limit the connecting column through the locking hole; the connecting column limits the pressure block and the sealing cover; the limiting ring can limit external liquid injection equipment; the locking block seals the inlet hole; the pressure block seals the inlet hole through the limiting ring and the connecting column; the sealing cover seals the battery body; silicone rubber has good anti-corrosion properties for electrolyte; and the silicone rubber sealing cover and locking block can effectively extend service life.

[0009] This long-life injection port uses a sealing structure that offers excellent sealing performance.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, a support column is fixedly connected to the bottom of the sealing cover, and the outer side of the support column is fixedly connected to the inside of the pressure block.

[0012] The advantage of adopting the above-mentioned further solution is that the support column can provide support to the pressure block through the sealing cover.

[0013] Furthermore, the outer side of the support column is fixedly connected to the inner side of the connecting column, and the outer side of the support column is fixedly connected to the inner side of the locking block.

[0014] The advantage of adopting the above-mentioned further solution is that the support column can provide support to the connecting column through the sealing cover.

[0015] Furthermore, a sealing plug is fixedly connected to the bottom of the card block, and the sealing plug is adapted to the liquid inlet hole.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the sealing plug can further increase the sealing performance of the liquid inlet.

[0017] Furthermore, the top of the battery body is fixedly connected with four screws arranged in a rectangular array, the top of the four screws is inserted with the same pressure plate, and the outer sides of the four screws are threaded with nuts.

[0018] The advantage of adopting the above-mentioned further solution is that the four screws can provide a limiting effect for the pressure plate.

[0019] Furthermore, a positioning ring is fixedly connected to the bottom of the pressure plate, and the positioning ring is adapted to the sealing cover.

[0020] The advantage of adopting the above-mentioned further solution is that the positioning ring can provide a limiting effect on the sealing cover through the pressure plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a front view of the screw and pressure plate connection structure of this utility model;

[0023] Figure 3 This is a top view of the screw and nut connection structure of this utility model;

[0024] Figure 4 This is an enlarged view of the structure at point A of this utility model.

[0025] In the diagram: 1. Battery body; 2. Liquid inlet; 3. Locking hole; 4. Annular limiting groove; 5. Limiting ring; 6. Sealing cover; 7. Pressure block; 8. Connecting column; 9. Locking block; 10. Support column; 11. Sealing plug; 12. Screw; 13. Pressure plate; 14. Nut; 15. Positioning ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the embodiments, by Figure 1-4 The present invention provides a sealing structure for a long-life liquid injection hole. The present invention includes a battery body 1, a liquid inlet hole 2 and a locking hole 3 inside the battery body 1, an annular limiting groove 4 on the top of the battery body 1, a limiting ring 5 fixedly connected inside the battery body 1, a sealing cover 6 inserted inside the annular limiting groove 4, a pressure block 7 fixedly connected to the bottom of the sealing cover 6, a connecting post 8 fixedly connected to the bottom of the pressure block 7, and a locking block 9 adapted to the locking hole 3 fixedly connected to the bottom of the connecting post 8. Both the sealing cover 6 and the locking block 9 are made of silicone rubber.

[0028] A support column 10 is fixedly connected to the bottom of the sealing cover 6, and the outer side of the support column 10 is fixedly connected to the inside of the pressure block 7.

[0029] The support column 10 can provide support to the pressure block 7 through the sealing cover 6;

[0030] The outer side of the support column 10 is fixedly connected to the inner side of the connecting column 8, and the outer side of the support column 10 is fixedly connected to the inner side of the locking block 9.

[0031] The support column 10 can provide support to the connecting column 8 through the sealing cover 6, and the support column 10 can provide support to the locking block 9 through the sealing cover 6;

[0032] A sealing plug 11 is fixedly connected to the bottom of the card block 9, and the sealing plug 11 is adapted to the liquid inlet hole 2;

[0033] The sealing plug 11 can further increase the sealing performance of the liquid inlet 2;

[0034] The top of the battery body 1 is fixedly connected with four screws 12 arranged in a rectangular array. The top of the four screws 12 is inserted with the same pressure plate 13, and the outer sides of the four screws 12 are threaded with nuts 14.

[0035] The four screws 12 can provide a limiting effect for the pressure plate 13, and the four nuts 14 can further limit the pressure plate 13 through the four screws 12;

[0036] A positioning ring 15 is fixedly connected to the bottom of the pressure plate 13, and the positioning ring 15 is compatible with the sealing cover 6;

[0037] The positioning ring 15 can limit the sealing cover 6 through the pressure plate 13. The pressure plate 13 can apply pressure to the sealing cover 6, making the sealing cover 6 and the battery body 1 more airtight.

[0038] Working principle:

[0039] Insert the sealing cap 6 into the annular limiting groove 4. The sealing cap 6, through the support column 10, drives the pressure block 7, connecting column 8, locking block 9 and sealing plug 11 to seal the liquid inlet hole 2. The locking hole 3 limits the locking block 9. Insert the pressure plate 13 into the outside of the four screws 12. The positioning ring 15 limits the sealing cap 6. Tighten the four nuts 14 into the four screws 12 and press the sealing cap 6 through the pressure plate 13 to complete the sealing.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a long-life liquid injection port, comprising a battery body (1), characterized in that: The battery body (1) has an inlet hole (2) inside, a locking hole (3) inside, an annular limiting groove (4) on the top of the battery body (1), a limiting ring (5) fixedly connected inside the battery body (1), a sealing cover (6) inserted inside the annular limiting groove (4), a pressure block (7) fixedly connected to the bottom of the sealing cover (6), a connecting post (8) fixedly connected to the bottom of the pressure block (7), and a locking block (9) adapted to the locking hole (3) fixedly connected to the bottom of the connecting post (8). The sealing cover (6) and the locking block (9) are both made of silicone rubber.

2. The sealing structure for a long-life injection port according to claim 1, characterized in that: The bottom of the sealing cover (6) is fixedly connected to a support column (10), and the outer side of the support column (10) is fixedly connected to the inside of the pressure block (7).

3. The sealing structure for a long-life injection port according to claim 2, characterized in that: The outer side of the support column (10) is fixedly connected to the inner side of the connecting column (8), and the outer side of the support column (10) is fixedly connected to the inner side of the locking block (9).

4. The sealing structure for a long-life injection port according to claim 1, characterized in that: The bottom of the card block (9) is fixedly connected to a sealing plug (11), which is adapted to the liquid inlet (2).

5. The sealing structure for a long-life injection port according to claim 1, characterized in that: The top of the battery body (1) is fixedly connected to four screws (12) arranged in a rectangular array. The top of the four screws (12) is inserted into the same pressure plate (13), and the outer sides of the four screws (12) are threaded with nuts (14).

6. The sealing structure for a long-life injection port according to claim 5, characterized in that: A positioning ring (15) is fixedly connected to the bottom of the pressure plate (13), and the positioning ring (15) is adapted to the sealing cover (6).

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