Sealing structure for battery and battery

Abstract

The utility model relates to the technical field of battery sealing, and discloses a sealing structure for a battery and the battery. The sealing structure comprises a sealing gasket used for being arranged on a sealing face between a box body and a box cover, the sealing gasket comprises first sealing parts located on the periphery of a fastener for fastening the box body and the box cover and second sealing parts used for connecting the two adjacent first sealing parts, the first sealing parts at least avoid the outer side of the fastener, and the second sealing parts are used for connecting the two adjacent first sealing parts. A width of a portion of at least one of the first sealing portion and the second sealing portion is smaller than a width of the sealing surface. According to the sealing structure provided by the utility model, the structural design of the first sealing part and the second sealing part is optimized, specifically, the first sealing part is controlled to avoid the outer side of the fastener, and the width of the part existing in at least one of the first sealing part and the second sealing part is controlled to be smaller than the width of the sealing surface; and finally, the sealing effect of the sealing gasket is not affected, meanwhile, the material consumption of the sealing gasket is reduced, and the material cost and the weight of the sealing gasket are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery sealing, in particular to a sealing structure for a battery and a battery. Background Art

[0002] Batteries have always been the carrier of energy in the field of new energy. Regardless of the type of battery, the IP protection level has always been an important safety design that cannot be ignored. With the gradual development of technology, the battery industry generally began to use IP67 / 68 sealing levels, and the corresponding sealing methods have also evolved into sealing gaskets supported by sealants, sealing silicone rubber, and foaming sealing materials. As the name suggests, the sealing gasket is to isolate liquids, dust and other substances from the outside through the corresponding structural design and material properties, preventing these substances from entering the battery and causing function or performance degradation, or even safety accidents.

[0003] The battery comprises a box body with an open top and a box cover for covering the open end of the box body, wherein the box body and the box cover are connected by a plurality of screws, a sealing gasket is installed between the box body and the cover of the battery to seal the open end of the box body, and an escape opening for the screws to pass through is provided at the position corresponding to the screws.

[0004] Traditional gaskets usually use foamed silicone surface, that is, positive sealing of the sealing surface of the open end of the box, so that the width of the gasket is the same as the width of the sealing surface, and at the same time, the position of the gasket corresponding to the screw is provided with a relief. This design of gasket uses too much material, which increases the material cost. Utility Model Content

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the utility model provides a sealing structure for a battery and a battery.

[0006] The utility model provides a sealing structure for a battery, comprising a sealing gasket for being arranged on a sealing surface between a box body and a box cover, wherein the sealing gasket comprises a first sealing portion located at the periphery of a fastener fastening the box body and the box cover, and a second sealing portion for connecting two adjacent first sealing portions, wherein the first sealing portion at least avoids the outer side of the fastener, and the width of a portion existing in at least one of the first sealing portion and the second sealing portion is smaller than the width of the sealing surface.

[0007] Optionally, a width of the second sealing portion is greater than or equal to a width of the first sealing portion.

[0008] Optionally, the width of the first sealing portion is 0.4 to 0.6 times the width of the sealing surface; and or the width of the second sealing portion is 0.4 to 0.6 times the width of the sealing surface.

[0009] Optionally, the first sealing portion is located on the inner side of the fastener, and the width of the first sealing portion at each position is the same.

[0010] Optionally, the inner side of the first sealing portion is flush with the inner side of the box body, and the outer side of the first sealing portion abuts against the inner side of the fastener;

[0011] And / or, the inner side of the second sealing portion is flush with the inner side of the box body.

[0012] Optionally, the outer side of the second sealing portion is flush with the outer side of the first sealing portion;

[0013] And / or, the width of the second sealing portion is the same as the width of the first sealing portion.

[0014] Optionally, a fastener extends out from the outer side of the second sealing portion, so that an arc-shaped groove for avoiding the fastener is formed at the connection between the first sealing portion and the second sealing portion.

[0015] Optionally, the first sealing portion is in an arc-shaped structure, and both ends of the first sealing portion extend toward the outside of the fastener, and the second sealing portion is connected to the end of the first sealing portion.

[0016] Optionally, the outer side of the second sealing portion is flush with the outer side of the box body.

[0017] The utility model also provides a battery, comprising a box body and a cover body arranged at the open end of the box body, and the sealing surface between the box body and the cover body is provided with the above-mentioned sealing structure for the battery.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0019] In the sealing structure provided by the utility model, by optimizing the structural design of the first sealing part and the second sealing part, specifically by controlling the first sealing part to avoid the outside of the fastener and by controlling the width of the existing part of at least one of the first sealing part and the second sealing part to be smaller than the width of the sealing surface, it is ultimately achieved that the material used for the sealing gasket is reduced without affecting the sealing effect of the sealing gasket, thereby reducing the material cost and the weight of the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0021] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a structural schematic diagram of a sealing structure for a battery according to an embodiment of the utility model;

[0023] Figure 2 This is a structural schematic diagram of a sealing structure for a battery when the width of the second sealing portion is the same as the width of the first sealing portion according to an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a sealing structure for a battery when the first sealing portion is in an arc-shaped structure according to an embodiment of the utility model.

[0025] Description of Reference Numerals

[0026] 1. Box body; 11. Rivet nut; 12. Outside of fastener; 13. Inside of fastener; 2. Sealing gasket; 21. First sealing part; 22. Second sealing part; 3. Sealing surface. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0028] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the implementation methods in the specification are only part of the implementation methods of the present invention, rather than all of the implementation methods.

[0029] In the related art, a sealing gasket is provided between the box body and the box cover, and generally the width of the sealing gasket is ensured to be the same as the width of the sealing surface, so as to ensure the sealing effect. However, during the actual research and development process, the applicant found that the sealing gasket can reduce the material consumption by optimizing the structure in this specific scenario, while also ensuring the sealing effect. The technical solution of this application is generated based on this, and the specific technical solution is as follows.

[0030] Before developing the technical solution of the present application, it is necessary to explain in detail some of the technical features involved, specifically: (a) "inside" and "outside": both are defined and described with reference to the box body 1. The "inside" refers to the side close to the inside of the box body 1, such as the inner side of a fastener refers to the side of the fastener close to the inside of the box body 1; similarly, the "outside" refers to the side close to the outside of the box body 1, such as the outer side of a fastener refers to the side of the fastener close to the outside of the box body 1; (b) "width" is defined and described with reference to the thickness of the side wall of the box body 1, such as "the width of the sealing surface 3" refers to the width of the sealing surface 3 along the thickness direction of the side wall of the box body 1; similarly, "the width of a portion of at least one of the first sealing portion 21 and the second sealing portion 22" refers to the width of the corresponding portion along the thickness direction of the side wall of the box body 1.

[0031] Combination Figures 1 to 3 As shown, the sealing structure for a battery provided by the embodiment of the utility model includes a sealing gasket 2 for being arranged on a sealing surface 3 between a box body 1 and a box cover, and the sealing gasket 2 includes a first sealing portion 21 on the periphery of a fastener fastening the box body 1 and the box cover, specifically including a plurality of first sealing portions 21 located on the periphery of a plurality of fasteners connected between the box body 1 and the box cover, and a plurality of second sealing portions 22 for connecting two adjacent first sealing portions 21, wherein the fastener may specifically be a matching structure of a screw and a rivet nut 11, and when the screw is screwed into the rivet nut 11 on the box body 1, the first sealing portion 21 is arranged on the periphery of the rivet nut 11. The first sealing portion 21 at least avoids the outer side 12 of the fastener. For example, the first sealing portion 21 only avoids the outer side 12 of the fastener, at which time, the first sealing portion 21 surrounds the outer periphery of the fastener, and makes the first sealing portion 21 open on one side facing the fastener. For another example, the first sealing portion 21 is completely located on the inner side 13 of the fastener. For another example, the first sealing portion 21 can avoid the outer side 12 of the fastener and the side adjacent to the outer side 12 of the fastener. It can be seen that the arrangement of the first sealing portion 21 is not limited, as long as a portion can avoid the outer side 12 of the fastener.

[0032] The width of a portion of at least one of the first sealing portion 21 and the second sealing portion 22 is smaller than the width of the sealing surface 3. For example, the width of a portion of the first sealing portion 21 is smaller than the width of the sealing surface 3, in which case the width of the second sealing portion 22 is the same as the width of the sealing surface 3; for another example, the width of each position of the first sealing portion 21 is smaller than the width of the sealing surface 3, in which case the width of the second sealing portion 22 is the same as the width of the sealing surface 3; for another example, the width of a portion or all of the second sealing portion 22 is smaller than the width of the sealing surface 3, in which case, except for the first sealing portion 21 where the outer side 12 of the fastener is avoided, the width of the other portions of the first sealing portion 21 is the same as the width of the sealing surface 3; for another example, the width of a portion of the first sealing portion 21 and the width of a portion of the second sealing portion 22 are both smaller than the width of the sealing surface 3; for another example, the width of each position of the first sealing portion 21 and the width of each position of the second sealing portion 22 are both smaller than the width of the sealing surface 3, which are not restrictive.

[0033] It can be understood that the battery includes a box body 1 with an open top and a box cover for covering the open end of the box body 1, wherein the box body 1 and the box cover are connected by a plurality of fasteners, and the sealing gasket 2 is installed between the box body 1 and the cover of the battery to seal the open end of the box body 1. The shape of the sealing gasket 2 matches the shape and size of the sealing surface 3 of the box body 1, that is, when the sealing surface 3 of the box body 1 is rectangular, the sealing gasket 2 is also surrounded by a rectangular shape, and the sealing gasket 2 can be placed at the sealing surface 3 of the box body 1. The sealing gasket 2 is made of elastic material so that it has a certain amount of compression to ensure the sealing effect. A plurality of first sealing parts 21 and a plurality of second sealing parts 22 are connected end to end to form a complete sealing gasket 2, wherein the size of the portion of the first sealing part 21 away from the outer side 12 of the fastener should be the minimum sealing distance of the sealing gasket 2 to ensure the sealing effect of the sealing gasket 2.

[0034] In the sealing structure provided by the utility model, by optimizing the structural design of the first sealing part 21 and the second sealing part 22, specifically by controlling the first sealing part 21 to avoid the outer side 12 of the fastener, and by controlling the width of the existing part of at least one of the first sealing part 21 and the second sealing part 22 to be smaller than the width of the sealing surface 3, it is finally achieved that the material used for the sealing gasket 2 is reduced, the material cost and the weight of the sealing gasket are reduced while not affecting the sealing effect of the sealing gasket 2. Through testing, the sealing grade requirements of this type of product are met.

[0035] In some embodiments, the width of the second sealing portion 22 is greater than or equal to the width of the first sealing portion 21. In this design, since the width of the first sealing portion 21 is the actual effective sealing width, the width of the second sealing portion 22 is set to be greater than or equal to the width of the first sealing portion 21, so that the sealing effect of the entire sealing pad 2 can be ensured.

[0036] In some embodiments, the width of the first sealing portion 21 is 0.4 to 0.6 times the width of the sealing surface 3. In this design, the width of the first sealing portion 21 is maximized to ensure a good sealing effect while reducing material costs, ultimately achieving an optimal balance between sealing effect and cost.

[0037] In some embodiments, the width of the second sealing portion 22 is 0.4 to 0.6 times the width of the sealing surface 3. In this design, the width of the second sealing portion 22 can ensure a good sealing effect while reducing the width of the second sealing portion 22, thereby saving material costs, and ultimately achieving an optimal balance between sealing effect and cost.

[0038] In some embodiments, in combination Figure 1 and Figure 2 As shown, the first sealing portion 21 is located on the inner side 13 of the fastener, and the width of the first sealing portion 21 at each position is the same.

[0039] In this design, each position of the first sealing portion 21 is located on the inner side 13 of the fastener, so that the sealing of the first sealing portion 21 is effective, avoiding waste of material, and the width of each position of the first sealing portion 21 is the same, ensuring the sealing effect of the first sealing portion 21.

[0040] In some embodiments, the first sealing portion 21 is in a strip-shaped structure to facilitate the processing and installation of the first sealing portion 21. It is understandable that the first sealing portion 21 may also be in an arc-shaped structure or an irregular structure, etc., and may be designed according to actual needs, as long as the first sealing portion 21 is located on the inner side 13 of the fastener.

[0041] In some embodiments, continue to refer to Figure 1 and Figure 2 The inner side of the first sealing portion 21 is flush with the inner side of the box body 1 , and the outer side of the first sealing portion 21 abuts against the inner side 13 of the fastener.

[0042] This design maximizes the width of the first sealing portion 21 to increase the sealing effect of the first sealing portion 21 , while preventing the inner side of the first sealing portion 21 from protruding from the inner side of the box body 1 to avoid affecting the installation of corresponding components inside the box body 1 .

[0043] In some embodiments, the inner side of the second sealing portion 22 is flush with the inner side of the box body 1 .

[0044] In this design, the inner side of the second sealing portion 22 is prevented from protruding from the inner side of the box body 1, thereby preventing the installation of corresponding components inside the box body 1 from being affected, and preventing the performance of the battery from being affected.

[0045] In some embodiments, the inner side of the first sealing portion 21 is flush with the inner side of the box body 1 , and at the same time, the inner side of the second sealing portion 22 is also flush with the inner side of the box body 1 .

[0046] In this design, the inner side of the first sealing portion 21 is flush with the inner side of the second sealing portion 22, so that the inner side of the sealing gasket 2 is annular in structure, which makes the shape of the sealing gasket 2 more standardized and increases the convenience of manufacturing.

[0047] In some embodiments, the outer side of the second sealing portion 22 is flush with the outer side of the first sealing portion 21 .

[0048] With this design, a regular annular structure is formed on the outer side of the sealing gasket 2, so that the shape of the sealing gasket 2 is more standardized and the manufacturing convenience is increased.

[0049] In some embodiments, Figure 2 As shown, the width of the second sealing portion 22 is the same as the width of the first sealing portion 21 .

[0050] With this design, the sealing distance of the first sealing portion 21 is the same as the sealing distance of the second sealing portion 22, so that the sealing effects at all positions of the sealing gasket 2 are the same, which ensures the sealing effect of the sealing gasket 2 while further reducing the application of materials and lowering material costs.

[0051] In some embodiments, the inner sides of the first sealing portion 21 and the second sealing portion 22 are flush with the inner side of the box body 1 , the outer side of the first sealing portion 21 abuts against the inner side 13 of the fastener, and the outer side of the second sealing portion 22 is flush with the outer side of the first sealing portion 21 .

[0052] Under this design, the sealing gasket 2 is annular in structure as a whole, which makes the structure of the sealing gasket 2 more regular, increases the convenience of manufacturing, and enables the sealing gasket 2 to have a maximum sealing distance and the least manufacturing material, thereby eliminating useless sealing materials and retaining only effective sealing materials, reducing costs while ensuring the sealing effect.

[0053] In some embodiments, Figure 1 As shown, a fastener extends out of the outer side of the second sealing portion 22, so that an arc groove for avoiding the fastener is formed at the connection between the first sealing portion 21 and the second sealing portion 22.

[0054] Under this design, during installation, the arc groove is relative to the screw hole on the box body 1 to avoid the screwing of the fastener and avoid affecting the assembly of the box body 1 and the box cover. At the same time, the setting of the arc groove increases the accuracy of the positioning of the sealing gasket 2 and ensures the sealing effect of the sealing gasket 2.

[0055] In some embodiments, the arc groove is semicircular, which can ensure the positioning effect of the sealing gasket 2 and prevent the sealing gasket 2 from shaking.

[0056] In some embodiments, Figure 3 As shown, the first sealing portion 21 is an arc-shaped structure, and both ends of the first sealing portion 21 extend toward the outer side 12 of the fastener, and the second sealing portion 22 is connected to the end of the first sealing portion 21. Specifically, the convex position of the first sealing portion 21 is located on the inner side 13 of the fastener, and the outer side of the first sealing portion 21 is open at a position corresponding to the fastener, saving material costs.

[0057] Under this design, the second sealing portion 22 is located at the outer part of the sealing surface 3 of the box body 1. At the same time, an avoidance groove can be formed between the second sealing portion 22 and the first sealing portion 21 for the fastener to pass through, and the first sealing portion 21 surrounds the outer periphery of the fastener to ensure the positioning effect.

[0058] In some embodiments, the outer side of the second sealing portion 22 is flush with the outer side of the box body 1 .

[0059] With this design, a regular annular structure is formed on the outer side of the sealing gasket 2, so that the shape of the sealing gasket 2 is more standardized and the manufacturing convenience is increased.

[0060] In some embodiments, the width of the second sealing portion 22 is the same as the width of the first sealing portion 21 , which ensures the sealing effect and reduces the material cost of the sealing gasket 2 .

[0061] It is understandable that in other embodiments, the width of the second sealing portion 22 is greater than the width of the first sealing gasket 2 , which is not restrictive and can be designed according to actual needs.

[0062] In some embodiments, in combination Figures 1 to 3 As shown, through holes are provided at positions corresponding to the box body 1 and the box cover, and rivet nuts 11 are riveted at the through holes of the box body 1. The top of the rivet nut 11 extends out of the box body 1, and the screw is screwed into the rivet nut 11. At this time, the first sealing portion 21 of the sealing gasket 2 is located at the periphery of the rivet nut 11 on the periphery of the screw.

[0063] During installation, the gasket 2 is placed on the open end of the box body 1, and the first sealing portion 21 of the gasket 2 is located at the outer periphery of the rivet nut 11, and the top of the gasket 2 extends out of the top of the rivet nut 11. The box cover is closed, so that the box cover opening is at the sealing surface 3 of the box body 1, and the box cover is pressed against the gasket 2. At this time, the through hole on the box cover is opposite to the rivet nut 11, and the box cover is connected to the box body 1 by screwing the fastener.

[0064] With this design, the sealing effect between the box body 1 and the box cover is increased. At the same time, the design of the rivet nut 11 increases the convenience of positioning the sealing gasket 2, ensuring the installation effect and efficiency.

[0065] In some embodiments, the plurality of first sealing portions 21 and the plurality of second sealing portions 22 are integrally formed to ensure the sealing effect of the sealing gasket 2 composed of the plurality of first sealing portions 21 and the plurality of second sealing portions 22 , while increasing the convenience of manufacturing the sealing gasket 2 .

[0066] The utility model also provides a battery, comprising a box body 1 and a cover body arranged at the open end of the box body 1, and the sealing structure for the battery is arranged on the sealing surface 3 between the box body 1 and the cover body. The sealing structure for the battery here includes all the technical features of the sealing structure for the battery.

[0067] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0068] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A sealing structure for a battery, characterized in that: The invention comprises a sealing gasket (2) for being arranged on a sealing surface (3) between a box body (1) and a box cover, the sealing gasket (2) comprising a first sealing portion (21) located at the periphery of a fastener fastening the box body (1) and the box cover, and a second sealing portion (22) for connecting two adjacent first sealing portions (21), wherein the first sealing portion (21) at least avoids the outer side (12) of the fastener, and the width of a portion existing in at least one of the first sealing portion (21) and the second sealing portion (22) is smaller than the width of the sealing surface (3).

2. The sealing structure for a battery according to claim 1, characterized in that: The width of the second sealing portion (22) is greater than or equal to the width of the first sealing portion (21).

3. The sealing structure for a battery according to claim 1, characterized in that: The width of the first sealing portion (21) is 0.4 to 0.6 times the width of the sealing surface (3); and or, The width of the second sealing portion (22) is 0.4 to 0.6 times the width of the sealing surface (3).

4. The sealing structure for a battery according to claim 1, characterized in that: The first sealing portion (21) is located on the inner side (13) of the fastener, and the width of the first sealing portion (21) at each position is the same.

5. The sealing structure for a battery according to claim 1, characterized in that: The inner side of the first sealing portion (21) is flush with the inner side of the box body (1), and the outer side of the first sealing portion (21) is in contact with the inner side (13) of the fastener; And / or, the inner side of the second sealing portion (22) is flush with the inner side of the box body (1).

6. The sealing structure for a battery according to claim 1, characterized in that: The outer side of the second sealing portion (22) is flush with the outer side of the first sealing portion (21); And / or, the width of the second sealing portion (22) is the same as the width of the first sealing portion (21).

7. The sealing structure for a battery according to claim 1, characterized in that: The fastener extends outward from the outer side of the second sealing portion (22), so that an arc-shaped groove for avoiding the fastener is formed at the connection between the first sealing portion (21) and the second sealing portion (22).

8. The sealing structure for a battery according to claim 1, characterized in that: The first sealing portion (21) is an arc-shaped structure, and both ends of the first sealing portion (21) extend toward the outer side (12) of the fastener, and the second sealing portion (22) is connected to the end of the first sealing portion (21).

9. The sealing structure for a battery according to claim 8, characterized in that: The outer side of the second sealing portion (22) is flush with the outer side of the box body (1).

10. A battery, characterized in that: It comprises a box body (1) and a cover body arranged at the open end of the box body (1), and a sealing structure for a battery as claimed in any one of claims 1 to 9 is provided on a sealing surface (3) between the box body (1) and the cover body.

Images