Sealing element and battery with same

Abstract

The utility model belongs to the technical field of batteries, and discloses a sealing element and a battery with the same. The sealing piece comprises a top cover and a sealing structure, a liquid injection hole is formed in the top cover, and an annular pressing part is arranged around the liquid injection hole in a protruding mode. The sealing structure comprises an elastic connecting end and a sealing cover, the hardness of the sealing cover is larger than that of the elastic connecting end, the elastic connecting end is inserted into the liquid injection hole in an interference mode, the sealing cover covers the liquid injection hole in an attached mode, and the annular pressing part can deform and is annularly pressed on the top face of the sealing cover so that the sealing cover can be clamped between the liquid injection hole and the annular pressing part. The hardness of the sealing cover is greater than that of the elastic connecting end, so that the deformation resistance of the sealing cover is enhanced, and when gas is generated in the battery and the air pressure is increased, the strength of the sealing cover is sufficient to resist the air pressure, so that the deformation degree of the sealing cover is greatly reduced, and the sealing cover is not easy to separate from the annular pressing part; therefore, the air tightness of the sealing structure to the liquid injection hole can be ensured, and the use safety and reliability of the sealing element are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a sealing member and a battery having the same. Background Art

[0002] At present, the liquid injection hole on the battery cover plate is sealed by welding a sealing aluminum nail to the top cover plate, but the sealing reliability of the liquid injection hole of the welded battery is still difficult to guarantee.

[0003] To solve the above problems, the prior art provides a sealing assembly. In this sealing assembly, the sealing member includes an axially connected connecting portion and a sealing portion. The connecting portion protrudes radially from the sealing portion. The top cover is provided with a first groove, and a liquid injection hole is opened at the bottom of the first groove. A ring riveting portion also protrudes around the first groove. During specific assembly, the sealing portion is press-fitted into the liquid injection hole, and the ring riveting portion is riveted to the connecting portion so that the ring riveting portion is annularly pressed on the top surface of the connecting portion. By the above method, the sealing process can be greatly simplified, and the sealing performance can also be ensured. However, when gas is generated inside the battery and the air pressure increases, the strength and support of this sealing member are insufficient, and it is easy to deform and come off from the liquid injection hole, resulting in damage to the airtightness of the battery and affecting the stable operation of the battery.

[0004] Based on the above, there is an urgent need for a sealing member and a battery having the same to solve the technical problems existing in the prior art. Summary of the Utility Model

[0005] One of the purposes of the utility model is to provide a sealing member, which can ensure the airtightness at the liquid injection hole and improve the safety and reliability of the use of the sealing member.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A sealing member, comprising a top cover and a sealing structure. The top cover has a liquid injection hole, and a ring pressing portion protrudes around the liquid injection hole; the sealing structure includes an elastic connection end and a sealing cover, and the hardness of the sealing cover is greater than that of the elastic connection end. The elastic connection end is press-fitted into the liquid injection hole, the sealing cover is fitted and covered on the liquid injection hole, and the ring pressing portion can be deformed and annularly pressed on the top surface of the sealing cover to clamp the sealing cover between the liquid injection hole and the ring pressing portion.

[0008] Preferably, the elastic connection end is a rubber part.

[0009] Preferably, the sealing cover is an aluminum part.

[0010] Preferably, the elastic connection end is detachably connected to the sealing cover.

[0011] Preferably, the elastic connection end is of a stepped structure and includes a first connection part and a second connection part connected axially. The first connection part is press-fitted into the liquid injection hole in an interference fit manner. The cross-sectional area of the second connection part is larger than that of the first connection part. The bottom surface of the second connection part protruding from the first connection part is abutted against the opening of the liquid injection hole.

[0012] Preferably, the sealing cover is of a "Ji"-shaped structure and includes a first sealing part and a second sealing part. The first sealing part seals and covers the second connection part. The second sealing part is arranged around the peripheral side wall of the first sealing part and is abutted against the opening of the liquid injection hole. The ring pressing part is annularly pressed on the second sealing part.

[0013] Preferably, the side wall of the first sealing part is spaced from the outer edge of the second connection part so that the inner end surface of the first sealing part can be connected to the top surface of the second connection part.

[0014] Preferably, a sunk groove is provided on the top cover. The liquid injection hole is provided at the bottom of the sunk groove. The ring pressing part protrudes around the sunk groove. The sealing structure is buried in the sunk groove.

[0015] Preferably, the thickness dimension of the sealing cover is greater than or equal to 0.6 mm and less than or equal to 0.8 mm.

[0016] The beneficial effects of the seal provided by the present invention: In this seal, since a riveted connection state is formed between the sealing cover and the ring pressing part, the step of welding the sealing cover to fix it on the top cover can be omitted, thus simplifying the sealing process. In addition, since the hardness of the sealing cover is greater than that of the elastic connection end, the anti-deformation ability of the sealing cover is enhanced. When gas is generated inside the battery and the air pressure increases, the strength of the sealing cover is sufficient to resist the air pressure. Therefore, the deformation degree of the sealing cover is greatly reduced, and it is not easy to separate from the ring pressing part. Therefore, the airtightness of the sealing structure for the liquid injection hole can be ensured, and the use safety and reliability of this seal are effectively improved.

[0017] Another object of the present invention is to provide a battery, which can improve the use safety and reliability of the battery.

[0018] To achieve this purpose, the present invention adopts the following technical solutions:

[0019] A battery, including the above-mentioned seal. The battery further includes a housing and an electric core. The seal closes the housing, and the electric core is accommodated in the housing.

[0020] Advantages of the battery provided by the present utility model: The battery includes a housing, a battery cell, and the above-mentioned seal. The seal closes the housing, and the battery cell is accommodated in the housing. By providing the above-mentioned seal on the battery, the airtightness of the battery is better, the use safety is higher, and the production efficiency can be improved. Description of the Drawings

[0021] Figure 1 FIG. is a schematic structural view of the seal provided by an embodiment of the present utility model when the annular pressing portion is not annularly pressed on the sealing cover;

[0022] Figure 2 FIG. is a cross-sectional view of the seal provided by an embodiment of the present utility model when the annular pressing portion is not annularly pressed on the sealing cover;

[0023] Figure 3 is Figure 2 a partial enlarged view of portion A in

[0024] Figure 4 FIG. is a schematic structural view of the seal provided by an embodiment of the present utility model after the annular pressing portion is annularly pressed on the sealing cover;

[0025] Figure 5 is Figure 2 an exploded view of the structure involved in portion A in

[0026] In the figure:

[0027] 1. Top cover; 11. Liquid injection hole; 12. Annular pressing portion; 13. Sinking groove;

[0028] 2. Sealing structure; 21. Elastic connection end; 211. First connection portion; 212. Second connection portion; 22. Sealing cover; 221. First sealing portion; 222. Second sealing portion. Detailed Embodiment

[0029] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0030] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the case where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0032] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", and "left" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0033] The following will introduce the technical solution provided by the present utility model in conjunction with the drawings and specific embodiments.

[0034] Combined Figures 1 to 5 As shown, this embodiment provides a seal, which is applied to a battery. Specifically, the seal includes a top cover 1 and a sealing structure 2. Among them, the top cover 1 has a liquid injection hole 11, and a ring pressing portion 12 is convexly provided around the liquid injection hole 11; the sealing structure 2 includes an elastic connection end 21 and a sealing cover 22. The hardness of the sealing cover 22 is greater than that of the elastic connection end 21. The elastic connection end 21 is press-fitted into the liquid injection hole 11, the sealing cover 22 is fitted and covered on the liquid injection hole 11, and the ring pressing portion 12 can be deformed and annularly pressed on the top surface of the sealing cover 22 to clamp the sealing cover 22 between the liquid injection hole 11 and the ring pressing portion 12.

[0035] In the above setting, a riveted connection state is formed between the sealing cover 22 and the ring pressing part 12, so that the step of welding the sealing cover 22 to fix the sealing cover 22 on the top cover 1 can be omitted, thus simplifying the sealing process; in addition, since the hardness of the sealing cover 22 is greater than that of the elastic connection end 21, the anti-deformation ability of the sealing cover 22 is enhanced. When gas is generated inside the battery and the air pressure increases, the strength of the sealing cover 22 is sufficient to resist the air pressure. Therefore, the deformation degree of the sealing cover 22 is greatly reduced, so it is not easy to separate from the ring pressing part 12. Therefore, the airtightness of the sealing structure 2 to the liquid injection hole 11 can be ensured, thereby effectively improving the use safety and reliability of the sealing part.

[0036] In this embodiment, the top cover 1 is strip-shaped to be applicable to a square aluminum shell battery. Of course, in other embodiments, the top cover 1 can also be circular to be applicable to a cylindrical battery.

[0037] Furthermore, in this embodiment, a sunk groove 13 is provided on the top cover 1. The bottom of the sunk groove 13 is provided with a liquid injection hole 11, and a ring pressing part 12 is convexly provided around the sunk groove 13. The sealing structure 2 is buried in the sunk groove 13 to avoid the sealing structure 2 protruding outside the top cover 1, so as to avoid the influence of external acting forces and ensure that the sealing structure 2 will not have the consequence of sealing performance failure due to deformation and damage.

[0038] Preferably, in this embodiment, the elastic connection end 21 is made of rubber. The rubber material has good elasticity and compressibility. Therefore, when the elastic connection end 21 is inserted into the liquid injection hole 11 with interference, the elastic connection end 21 can first deform to match the shape and size of the liquid injection hole 11. After being inserted into the liquid injection hole 11, it can rebound, so that the elastic connection end 21 can effectively fill and seal the liquid injection hole 11, ensuring good airtightness of the liquid injection hole 11. Of course, in other embodiments, the elastic connection end 21 can also be made of other materials with elasticity and compressibility such as silica gel and polyurethane. The present invention is not limited thereto.

[0039] Specifically, as shown in Figures 3 to 5 the elastic connection end 21 is a stepped structure, and its cross-sectional shape is T-shaped. Specifically, it includes an axially connected first connection part 211 and a second connection part 212. The first connection part 211 is inserted into the liquid injection hole 11 with interference. The cross-sectional area of the second connection part 212 is larger than that of the first connection part 211, and the bottom surface of the second connection part 212 protruding from the first connection part 211 is abutted against the opening of the liquid injection hole 11, that is, abutted against the bottom of the sunk groove 13. Through the above setting, the position of the first connection part 211 in the liquid injection hole 11 can be restricted by the second connection part 212, ensuring that the entire elastic connection end 21 will not fall into the battery interior along the liquid injection hole 11.

[0040] Preferably, in this embodiment, the sealing cover 22 is made of aluminum. The sealing cover 22 made of aluminum has a light structure, and also has high strength and rigidity, which can reduce the weight of the sealing cover 22 while ensuring strength, and further helps to reduce the weight of the sealing member and even the entire battery. Of course, in other embodiments, the sealing cover 22 can also be made of steel to meet higher requirements for the strength and stiffness of the sealing cover 22. Therefore, those skilled in the art can select the material of the sealing cover 22 according to the actual working conditions as long as the sealing cover 22 can resist the internal air pressure of the battery and maintain structural stability, which is within the protection scope of the present utility model.

[0041] Furthermore, in this embodiment, the thickness dimension of the sealing cover 22 is greater than or equal to 0.6 mm and less than or equal to 0.8 mm. For example, the thickness dimension of the sealing cover 22 can be 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm or 0.8 mm, etc., so that the thickness of the sealing cover 22 is not too small to meet the requirement of structural strength, nor too large to increase the consumption cost.

[0042] It should be noted that, in this embodiment, the elastic connection end 21 is detachably connected to the sealing cover 22. Since it is difficult to integrally form the elastic connection end 21 and the sealing cover 22, the way of separately setting the two can reduce the processing and manufacturing pressure and help to improve production efficiency.

[0043] Specifically, in this embodiment, as shown in Figures 3 to 5 , the sealing cover 22 has a "ji" - shaped structure and includes a first sealing portion 221 and a second sealing portion 222. Among them, the first sealing portion 221 of the sealing cover 22 is provided on the second connecting portion 212, the second sealing portion 222 is arranged around the peripheral side wall of the first sealing portion 221 and fits and abuts against the opening of the liquid injection hole 11, and the ring pressing portion 12 is annularly pressed on the second sealing portion 222. Through the above - mentioned setting, the second connecting portion 212 protruding from the liquid injection hole 11 can be avoided by the first sealing portion 221, and it can also ensure that the ring pressing portion 12 can tightly press the sealing cover 22 on the sinking groove 13, so as to ensure the installation effect of the sealing cover 22.

[0044] Further, in this embodiment, the side wall of the first sealing portion 221 is spaced from the outer edge of the second connecting portion 212, that is, the radial dimension of the first sealing portion 221 is greater than the radial dimension of the second connecting portion 212. When the sealing cover 22 is covered on the elastic connecting end 21, the second sealing portion 222 will not affect the fitting connection between the top surface of the first connecting portion 211 and the inner end surface of the first sealing portion 221, and there will be no mating gap between the first sealing portion 221 and the second connecting portion 212, so that the sealing cover 22 and the elastic connecting end 21 can be tightly connected, further improving the connection stability between the two.

[0045] This embodiment also provides a battery, which includes a housing, an electric core, and the sealing member provided in the above embodiment. The sealing member seals the housing, and the electric core is accommodated in the housing. By providing the above-mentioned sealing member on the battery, the airtightness of the battery is better, the use safety is higher, and the production efficiency can be improved.

[0046] In the description of this specification, the description with reference to terms such as "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A seal, characterized in that, It includes a top cover (1) and a sealing structure (2). The top cover (1) is provided with a liquid injection hole (11), and a circumferential pressing part (12) is convexly provided around the liquid injection hole (11); the sealing structure (2) includes an elastic connection end (21) and a sealing cover (22), and the hardness of the sealing cover (22) is greater than that of the elastic connection end (21). The elastic connection end (21) is press-fitted into the liquid injection hole (11), the sealing cover (22) is fitted and covered on the liquid injection hole (11), and the circumferential pressing part (12) can be deformed and annularly pressed on the top surface of the sealing cover (22) to clamp the sealing cover (22) between the liquid injection hole (11) and the circumferential pressing part (12).

2. The seal according to claim 1, wherein The elastic connection end (21) is a rubber part.

3. The seal according to claim 1, characterized in that, The sealing cover (22) is an aluminum part.

4. The seal according to claim 1, characterized in that, The elastic connection end (21) is detachably connected to the sealing cover (22).

5. The seal according to any one of claims 1-4, characterized in that The elastic connection end (21) is of a stepped structure and includes an axially connected first connection part (211) and a second connection part (212). The first connection part (211) is press-fitted into the liquid injection hole (11), the cross-sectional area of the second connection part (212) is larger than that of the first connection part (211), and the bottom surface of the second connection part (212) protruding from the first connection part (211) fits and abuts against the opening of the liquid injection hole (11).

6. The seal according to claim 5, characterized in that, The sealing cover (22) is of a "Ji" - shaped structure and includes a first sealing part (221) and a second sealing part (222). The first sealing part (221) is sealed and covered on the second connection part (212), the second sealing part (222) is annularly arranged on the circumferential side wall of the first sealing part (221) and fits and abuts against the opening of the liquid injection hole (11), and the circumferential pressing part (12) is annularly pressed on the second sealing part (222).

7. The seal according to claim 6, wherein The side wall of the first sealing part (221) is spaced from the outer edge of the second connection part (212) so that the inner end surface of the first sealing part (221) can be connected to the top surface of the second connection part (212).

8. The seal according to any one of claims 1-4, characterized in that, A sink (13) is provided on the top cover (1), the liquid injection hole (11) is provided at the bottom of the sink (13), the circumferential pressing part (12) is convexly provided around the sink (13), and the sealing structure (2) is buried in the sink (13).

9. The seal according to any one of claims 1-4, characterized in that, The thickness dimension of the sealing cover (22) is greater than or equal to 0.6 mm and less than or equal to 0.8 mm.

10. A battery, characterized in that, Including the seal according to any one of claims 1 - 9, the battery further includes a housing and an electric core, the seal closes the housing, and the electric core is accommodated in the housing.

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