Sealing element, top cover assembly and battery

Abstract

The utility model provides a sealing element, a top cover assembly and a battery, the sealing element is used for sealing a liquid injection hole on a battery top cover, the sealing element comprises: a first sealing part, the first sealing part comprises a first plug, the peripheral surface of the first plug is configured to be in interference connection with the liquid injection hole; the second sealing part comprises a positioning block and a second plug which are connected, the positioning block is connected with the first sealing part, the peripheral surface of the second plug is configured to be in interference connection with the liquid injection hole, and the positioning block is fixedly connected with a top cover of the battery. According to the utility model, the types of parts used in the battery preparation process can be reduced, the processing cost of the parts is reduced, the consumption of materials is reduced, the operation is also convenient, and specific nailing equipment does not need to be used.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a sealing element, a top cover assembly and a battery. Background Art

[0002] After the battery is filled with liquid, it is necessary to use a formation nail for sealing to prevent pollution and to carry out formation. During the formation process, the formation nail is inserted into the injection hole in a pull-out manner. When a secondary injection is required, the formation nail is pulled out for injection. After the formation is completed, the formation nail is usually pulled out, the sealing rubber particles are inserted, and then welded with a sealing aluminum sheet. In the above process, the formation nail and the sealing rubber particles are both used for sealing, and the materials of the two are similar and need to be processed separately, which results in an increase in the production process and cost. At the same time, the increase in the number of parts also increases the difficulty of operation. Utility Model Content

[0003] The embodiments of the utility model provide a sealing member, a top cover assembly and a battery, which can improve the technical problems of high cost and inconvenient operation in the existing battery filling process.

[0004] In a first aspect, an embodiment of the utility model provides a sealing member for sealing a liquid injection hole on a battery top cover, comprising:

[0005] a first sealing portion, the first sealing portion comprising a first plug, the circumference of the first plug being configured to be in interference connection with the injection hole;

[0006] The second sealing part includes a positioning block and a second plug connected to each other, wherein the positioning block is connected to the first sealing part, the peripheral surface of the second plug is configured to be in interference connection with the injection hole, and the positioning block is fixedly connected to the top cover of the battery.

[0007] In the embodiment of the utility model, by interference-connecting the first plug with the injection hole, the first sealing part and the injection hole can be quickly plugged in and out, so that in the battery formation process, the injection hole can be quickly and effectively sealed and opened, and the injection hole can be blocked by the second plug. The second plug can be positioned and fixed by the positioning block, so that the second plug can be quickly and effectively fixed in the injection hole. At the same time, when the first plug is inserted into the injection hole, the positioning block can also position the first plug to determine whether the first plug is fully inserted. The simple structure of the utility model seal can reduce the types of parts used in the battery processing process, reduce the processing cost of parts, and reduce the amount of materials used. It is also easy to operate and does not require the use of specific nailing equipment.

[0008] In one embodiment, the second sealing portion is integrally provided with the first sealing portion.

[0009] In the embodiment of the utility model, the first sealing part and the second sealing part are provided integrally, which can facilitate processing and use.

[0010] In one embodiment, the first plug is cylindrical, the injection hole is a circular hole, and the diameter of the first plug is 1.5 mm-4.0 mm; and / or

[0011] The diameter of the first plug is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole.

[0012] In the embodiment of the utility model, the diameter of the first plug can be controlled to match the existing injection hole size. By configuring the diameter of the first plug to be 0.05mm-0.2mm larger than the injection hole, the first plug can effectively seal the injection hole and facilitate quick insertion and removal.

[0013] In one embodiment, the positioning block includes a first positioning block and a second positioning block, the first positioning block and the second positioning block are respectively connected to two ends of the second plug, the first positioning block is connected to the first sealing portion, the first positioning block, the second plug and the second positioning block jointly define an annular groove, and the annular groove is configured to be clamped with the top cover of the battery after the second sealing portion is installed into the injection hole.

[0014] In an embodiment of the utility model, the second plug can be positioned by the annular groove, so that the second plug can be quickly and effectively stuck in the injection hole, which can effectively prevent the seal from being ejected with the circulating air pressure inside the battery. In one embodiment, the opposing surfaces of the first positioning block and the second positioning block are the side walls of the annular groove, and the side walls of the annular groove are configured to abut against the inner and outer surfaces of the top cover.

[0015] In the embodiment of the utility model, by abutting the side wall of the annular groove against the inner and outer surfaces of the top cover, the second sealing part can be prevented from moving axially along the injection hole, so that the second sealing part has a better sealing effect on the injection hole.

[0016] In one embodiment, the second positioning block is disposed inside the injection hole, and a radial dimension of the second positioning block gradually decreases in a direction away from the second plug.

[0017] In an embodiment of the utility model, by setting the radial dimension of the second positioning block to gradually decrease in the direction away from the second plug, the second positioning block can be inserted into the inner side of the injection hole more easily and quickly, thereby facilitating operation.

[0018] In one embodiment, the second positioning block is configured to be disposed inside the injection hole, and a through groove is disposed from the end surface of the second positioning block away from the second plug to the inside of the second sealing portion, and the through groove penetrates the second positioning block along the radial direction of the second positioning block.

[0019] In the embodiment of the utility model, by providing a through groove on the second positioning block, the second positioning block can be squeezed into the through groove, so that the second positioning block can be inserted into the inner side of the injection hole more easily and quickly, thereby facilitating operation.

[0020] In one embodiment, the through groove extends to the second plug, and the through groove penetrates the second plug along a radial direction of the second plug.

[0021] In the embodiment of the utility model, by extending the through groove to the second plug, the second plug can be squeezed into the through groove, so that the second plug can be inserted into the injection hole more easily and quickly, thereby facilitating operation.

[0022] In one embodiment, the second plug is cylindrical, the injection hole is a circular hole, and the diameter of the second plug is 1.5 mm-4.0 mm; and / or

[0023] The diameter of the second plug is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole.

[0024] In the embodiment of the utility model, the diameter of the second plug can be controlled to match the existing injection hole size. By configuring the diameter of the second plug to be 0.05mm-0.2mm larger than the injection hole, the second plug can effectively seal the injection hole and facilitate quick insertion and removal.

[0025] In a second aspect, an embodiment of the utility model provides a top cover assembly, comprising:

[0026] A top cover provided with a liquid injection hole;

[0027] The above-mentioned sealing member is inserted into the liquid injection hole.

[0028] In one embodiment, the top cover assembly further includes a sealing cover, which is disposed above the sealing member and is fixedly connected to the top cover.

[0029] In the embodiment of the utility model, after the second sealing portion seals the injection hole, the sealing cover is fixedly connected to the top cover, so that the sealing member can be further fixed, thereby preventing the sealing member from shifting or sliding out.

[0030] In one embodiment, the injection hole includes a first hole segment and a second hole segment that are connected from the outside to the inside, the diameter of the first hole segment is larger than the diameter of the second hole segment, the second sealing portion seals the second hole segment, the circumferential surface of the sealing cover is fixedly connected to the circumferential surface of the first hole segment, and the surface of the sealing cover facing away from the sealing component does not exceed the outer surface of the top cover.

[0031] In the embodiment of the utility model, by arranging the sealing cover in the second hole section, the surface of the sealing cover does not exceed the outer surface of the injection hole, making it difficult to be touched, so that the sealing cover has a better sealing effect on the injection hole.

[0032] In one embodiment, the sealing cover abuts against a side of the second sealing portion facing away from the first sealing portion; and / or

[0033] The height of the edge of the sealing cover is 0.4 mm-1.5 mm.

[0034] In the embodiment of the utility model, the sealing cover is abutted against the sealing member, so that the position of the sealing member can be further limited, and it is not easy to shift. The peripheral surface of the sealing cover is fixedly connected to the top cover, and by limiting the height of the surrounding of the sealing cover, the sealing cover and the top cover can be firmly connected, and the depth of the injection hole can be prevented from being too deep.

[0035] In a third aspect, an embodiment of the utility model provides a battery, comprising the above-mentioned top cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is a structural schematic diagram of a sealing member provided in an embodiment of the utility model;

[0038] Figure 2 is a side view of a seal provided in an embodiment of the utility model;

[0039] Figure 3 is a cross-sectional view of a top cover provided in an embodiment of the utility model (without a sealing member and a sealing cover assembled);

[0040] Figure 4 is a partial cross-sectional view of a top cover assembly provided in an embodiment of the utility model;

[0041] Figure 5 It is a structural schematic diagram of a sealing cover provided in an embodiment of the utility model.

[0042] Description of the drawings: first sealing part-1; first plug-11; second sealing part-2; first positioning block-21; second plug-22; second positioning block-23; annular groove-24; through groove-25; top cover-4; injection hole-41; first hole section-411; second hole section-412; sealing cover-42. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0044] First, see Figures 1 to 4 The embodiment of the utility model provides a sealing member for sealing the injection hole 41 on the battery top cover 4, comprising:

[0045] A first sealing portion 1, wherein the first sealing portion 1 comprises a first plug 11, and a peripheral surface of the first plug 11 is configured to be in interference connection with the injection hole 41;

[0046] The second sealing part 2 includes a connected positioning block and a second plug 22, wherein the positioning block is connected to the first sealing part 1, the peripheral surface of the second plug 22 is configured to interfere with the injection hole 41, and the positioning block is fixedly connected to the top cover 4 of the battery.

[0047] It can be understood that the first sealing part 1 and the second sealing part 2 are connected, and the center lines of the first sealing part 1 and the second sealing part 2 are on a straight line (coaxial arrangement), such as the first sealing part 1 and the second sealing part 2 are arranged opposite to each other, or there is an angle between the center lines of the first sealing part 1 and the second sealing part 2. The center lines of the first sealing part 1 and the second sealing part 2 are on a straight line, which can be convenient for processing, and can also make the overall structure of the seal not easy to deform, and also facilitate the sealing operation of the seal and the injection hole 41. The shape of the first plug 11 and the second plug 22 can be set according to the shape of the injection hole 41, as long as the injection hole 41 can be sealed. The height of the first plug 11 (the length along the axial direction of the seal) can exceed the depth of the injection hole 41, or it can be less than the depth of the injection hole 41, or it can be equal to the depth of the injection hole 41, as long as the injection hole 41 can be effectively sealed and easy to plug and unplug in the injection hole 41. The shape and size of the positioning block can be set as needed, and it only needs to be fixedly connected to the top cover 4 and limit the second plug 22 in the injection hole 41.

[0048] In one embodiment, the second sealing portion 2 and the first sealing portion 1 are integrally provided.

[0049] It can be understood that the second sealing portion 2 and the first sealing portion 1 are integrally provided, and the second sealing portion 2 and the first sealing portion 1 can be obtained by processing from a whole piece of material.

[0050] In one embodiment, the first plug 11 is cylindrical, the injection hole 41 is a circular hole, and the diameter of the first plug 11 is 1.5 mm-4.0 mm; and / or

[0051] The diameter of the first plug 11 is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole 41 .

[0052] It can be understood that the value by which the diameter of the first plug 11 is greater than the diameter of the injection hole 41 can be determined according to the materials of the injection hole 41 and the first plug 11 .

[0053] In one embodiment, the second sealing portion 2 includes a first positioning block 21 and a second positioning block 23, the first positioning block 21 and the second positioning block 23 are respectively connected to the two ends of the second plug 22, the first positioning block 21 is connected to the first sealing portion 1, the first positioning block 21, the second plug 22 and the second positioning block 23 jointly define an annular groove 24, and the annular groove 24 is configured to be engaged with the top cover 4 of the battery after the second sealing portion 2 is installed in the injection hole 41.

[0054] It can be understood that the shape of the second positioning block 23 can be set according to the shape of the injection hole 41, as long as it is convenient to insert into the inner side of the injection hole 41. For example, if the injection hole 41 is a circular hole, the shape of the second positioning block 23 can be a truncated cone or a conical shape, which can facilitate the insertion of the second positioning block 23 into the injection hole 41. The height of the second positioning block 23 can be set as needed. The size of the first positioning block 21 and the second positioning block 23 needs to be larger than the size of the injection hole 41, so that the second plug 22 can be stuck in the injection hole 41. The height of the second plug 22 can exceed the height of the injection hole 41, or it can be equal to the height of the injection hole 41. The depth of the annular groove 24 close to the second positioning block 23 can be set as needed, as long as it is ensured that the second positioning block 23 is effectively stuck in the inner side of the injection hole 41, and at the same time, it is convenient for the second positioning block 23 to be inserted into the inner side of the injection hole 41. The depth of the annular groove 24 close to the first positioning block 21 can be set as needed, as long as it is ensured that the second plug 22 is effectively stuck in the injection hole 41 and is not easily displaced.

[0055] In one embodiment, the opposing surfaces of the first positioning block 21 and the second positioning block 23 are side walls of the annular groove 24 , and the side walls of the annular groove 24 are configured to abut against inner and outer surfaces of the top cover 4 .

[0056] It can be understood that the side wall of the annular groove 24 abuts against the inner and outer surfaces of the top cover 4, that is, the opposite surfaces of the first positioning block 21 and the second positioning block 23 abut against the inner and outer surfaces of the top cover 4, that is, the height of the second plug 22 is equal to the height of the injection hole 41, so that the second plug 22 can fully contact the injection hole 41 and seal the injection hole 41, while preventing the second sealing part 2 from moving along the axial direction of the injection hole 41 in the injection hole 41.

[0057] In one embodiment, the second positioning block 23 is configured to be disposed inside the injection hole 41 , and a radial dimension of the second positioning block 23 gradually decreases in a direction away from the second plug.

[0058] It can be understood that the radial dimension of the second positioning block 23 gradually decreases in the direction away from the second plug 22, so the second positioning block 23 can be truncated cone, conical, or other asymmetric shapes.

[0059] In one embodiment, the second positioning block 23 is configured to be disposed on the inner side of the injection hole 41 , and a through groove 25 is disposed from the end surface of the second positioning block 23 away from the second plug 22 to the inside of the second sealing portion 2 , and the through groove 25 penetrates the second positioning block 23 along the radial direction of the second positioning block 23 .

[0060] It is understandable that the width and depth of the through groove 25 can be set as needed, as long as it is convenient for the second positioning block 23 to be inserted into the inner side of the injection hole 41 and does not affect the engagement between the second positioning block 23 and the top cover 4 after being inserted into the injection hole 41.

[0061] In one embodiment, the through groove 25 extends to the second plug 22 , and the through groove 25 penetrates the second plug 22 along a radial direction of the second plug 22 .

[0062] It can be understood that the width and depth of the through groove 25 in the second plug 22 can be set as needed, as long as it is convenient for the second plug 22 to be inserted into the injection hole 41 and does not affect the interference connection between the second plug 22 and the injection hole 41. The depth of the through groove 25 should not extend to the first positioning block 21, so as to ensure that its depth does not penetrate the second plug 22, which can ensure sufficient interference between the second plug 22 and the injection hole, and ensure sufficient sealing of the injection hole.

[0063] In one embodiment, the second plug 22 is cylindrical, the injection hole 41 is a circular hole, and the diameter of the second plug 22 is 1.5 mm-4.0 mm; and / or

[0064] The diameter of the second plug 22 is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole 41 .

[0065] It can be understood that the diameter of the second plug 22 is greater than the diameter of the injection hole 41 by a value that can be determined according to the materials of the injection hole 41 and the first plug 11 .

[0066] Second, see Figures 1 to 4 , an embodiment of the utility model provides a top cover assembly, comprising:

[0067] The top cover 4 is provided with a liquid injection hole 41;

[0068] The above-mentioned sealing member is inserted into the liquid injection hole 41 .

[0069] In one embodiment, see Figure 5 The top cover assembly also includes a sealing cover 42, which is arranged above the sealing member and is fixedly connected to the top cover 4.

[0070] It can be understood that the shape and size of the sealing cover 42 can be set according to the shape and size of the injection hole 41 , and it only needs to be able to effectively fix the sealing member in the injection hole 41 .

[0071] In one embodiment, the injection hole 41 includes a first hole segment 411 and a second hole segment 412 that are connected from the outside to the inside, the diameter of the first hole segment 411 is larger than the diameter of the second hole segment 412, the second sealing portion 2 seals the second hole segment 412, the circumferential surface of the sealing cover 42 is fixedly connected to the circumferential surface of the first hole segment 411, and the surface of the sealing cover 42 facing away from the sealing component does not exceed the outer surface of the top cover 4.

[0072] It can be understood that the depth of the injection hole 41 can be set as needed, as long as the first hole segment 411 can be effectively connected to the seal, and the second hole segment 412 can be effectively connected to the sealing cover 42. In order to ensure that the first hole segment 411 is stably connected to the seal, and the second hole segment 412 is stably connected to the sealing cover 42, the depth of the injection hole 41 can be deepened. The circumferential surface of the sealing cover 42 and the circumferential surface of the first hole segment 411 can be arranged along the axial direction of the first hole segment 411, or there can be an angle with the axial direction of the first hole segment 411. When there is an angle between the circumferential surface of the sealing cover 42 and the circumferential surface of the first hole segment 411 and the axial direction of the first hole segment 411, the contact surface between the sealing cover 42 and the first hole segment 411 is larger, which is conducive to the fixed connection between the sealing cover 42 and the first hole segment 411. When the circumferential surface of the sealing cover 42 and the circumferential surface of the first hole segment 411 form an angle of 45° with the axial direction of the first hole segment 411 , the contact surface between the sealing cover 42 and the first hole segment 411 is the largest.

[0073] In one embodiment, the sealing cover 42 abuts against a side of the second sealing portion 2 facing away from the first sealing portion 1; and / or

[0074] The height of the edge of the sealing cover 42 is 0.4 mm-1.5 mm.

[0075] It can be understood that the sealing cover 42 abuts against the side of the second sealing part 2 facing away from the first sealing part 1. In order to make the outer surface of the sealing cover 42 not exceed the outer surface of the top cover 4, the side of the sealing cover 42 abutting against the second sealing part 2 can be set to be concave inward, so that the height of the abutting part of the sealing cover 42 and the second sealing part 2 is lower than the height of the surrounding area. The height of the edge of the sealing cover 42 refers to the height of the edge of the sealing cover 42 along the axial direction of the injection hole 41.

[0076] In a third aspect, an embodiment of the utility model provides a battery, comprising the above-mentioned top cover assembly.

[0077] The embodiments of the present invention are described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A seal for sealing a liquid injection hole on a battery top cover, characterized in that: include: a first sealing portion, the first sealing portion comprising a first plug, the circumference of the first plug being configured to be in interference connection with the injection hole; The second sealing part includes a positioning block and a second plug connected to each other, wherein the positioning block is connected to the first sealing part, the peripheral surface of the second plug is configured to be in interference connection with the injection hole, and the positioning block is fixedly connected to the top cover of the battery.

2. The seal according to claim 1, characterized in that The second sealing portion is integrally provided with the first sealing portion.

3. The seal according to claim 1, characterized in that The first plug is cylindrical, the injection hole is a circular hole, and the diameter of the first plug is 1.5 mm-4.0 mm; and / or The diameter of the first plug is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole.

4. The seal according to claim 1, characterized in that The positioning block includes a first positioning block and a second positioning block, the first positioning block and the second positioning block are respectively connected to two ends of the second plug, the first positioning block is connected to the first sealing portion, the first positioning block, the second plug and the second positioning block jointly define an annular groove, and the annular groove is configured to be clamped with the top cover of the battery after the second sealing portion is installed in the injection hole.

5. The seal according to claim 4, characterized in that The opposing surfaces of the first positioning block and the second positioning block are side walls of the annular groove, and the side walls of the annular groove are configured to abut against the inner and outer surfaces of the top cover.

6. The seal according to claim 4, characterized in that The second positioning block is configured to be disposed inside the injection hole, and a radial dimension of the second positioning block gradually decreases in a direction away from the second plug.

7. The seal according to claim 4, characterized in that The second positioning block is configured to be disposed inside the injection hole, and a through groove is disposed from the end surface of the second positioning block away from the second plug to the inside of the second sealing portion, and the through groove penetrates the second positioning block along the radial direction of the second positioning block.

8. The seal according to claim 7, characterized in that The through slot extends to the second plug, and the through slot penetrates the second plug along a radial direction of the second plug.

9. The seal according to claim 4, characterized in that The second plug is cylindrical, the injection hole is a circular hole, and the diameter of the second plug is 1.5 mm-4.0 mm; and / or The diameter of the second plug is configured to be 0.05 mm-0.2 mm larger than the diameter of the injection hole.

10. A top cover assembly, characterized in that: include: A top cover provided with a liquid injection hole; The sealing member according to any one of claims 1 to 9, wherein the sealing member is inserted into the liquid injection hole.

11. The top cover assembly according to claim 10, characterized in that: The top cover assembly also includes a sealing cover, which is arranged above the sealing member and is fixedly connected to the top cover.

12. The top cover assembly according to claim 11, characterized in that: The injection hole includes a first hole segment and a second hole segment connected from the outside to the inside, the diameter of the first hole segment is larger than the diameter of the second hole segment, the second sealing portion seals the second hole segment, the circumferential surface of the sealing cover is fixedly connected to the circumferential surface of the first hole segment, and the surface of the sealing cover facing away from the sealing component does not exceed the outer surface of the top cover.

13. The top cover assembly according to claim 11, characterized in that: The sealing cover abuts against a side of the second sealing portion facing away from the first sealing portion; and / or The height of the edge of the sealing cover is 0.4 mm-1.5 mm.

14. A battery, characterized in that: Comprising a top cover assembly as described in any one of claims 10-13.

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