Sealing ring for battery pack

Abstract

The utility model relates to sealing device technical field especially relates to a kind of sealing ring for battery pack, it include: annular matrix;Main sealing lip and vice sealing lip;Main sealing lip and vice sealing lip are along the same side of annular matrix Circumferential extension setting, and all from the main body portion of annular matrix Outward extension, and the height of main sealing lip is greater than the height of vice sealing lip;Annular matrix, main sealing lip and vice sealing lip jointly define the sealing cavity of cross section U shape, the opening of sealing cavity is towards the extension direction of main sealing lip and vice sealing lip;On the cross section perpendicular to annular matrix centre axis, the width of sealing cavity gradually decreases from main body portion to opening direction;Compared with prior art, by setting main sealing lip and vice sealing lip, form multistage sealing structure, cooperate the sealing cavity of cross section U shape and width gradient, can effectively block moisture, dust and other impurities into battery pack, improve sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, and in particular to a sealing ring for a battery pack. Background Technology

[0002] In the new energy industry, the battery pack is a core component, and its sealing performance is crucial. If the battery pack is not well sealed, external moisture, dust and other impurities can easily enter the battery pack, which may lead to short circuits, performance degradation or even safety accidents.

[0003] Existing battery pack sealing rings have certain shortcomings in terms of sealing effect, durability, and adaptability to complex environments. For example, some sealing rings have a simple sealing structure, which makes it difficult to effectively prevent the intrusion of various media; the sealing performance of some sealing rings is affected when the battery pack is subjected to vibration or impact. Therefore, there is an urgent need for a sealing ring for battery packs with good sealing effect and high reliability. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a sealing ring for battery packs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sealing ring for a battery pack, characterized in that it comprises:

[0007] Ring matrix;

[0008] The main sealing lip and the secondary sealing lip are provided to extend circumferentially along the same side of the annular base, and both extend outward from the main body of the annular base, with the height of the main sealing lip being greater than that of the secondary sealing lip.

[0009] The annular base, the main sealing lip, and the secondary sealing lip together define a U-shaped sealing cavity, with the opening of the sealing cavity facing the extension direction of the main sealing lip and the secondary sealing lip.

[0010] On a cross-section perpendicular to the central axis of the annular base, the width of the sealing cavity gradually decreases from the main body towards the opening.

[0011] Preferably, it further includes a first dustproof lip and a second dustproof lip, the first dustproof lip being connected to the free end of the main sealing lip and the second dustproof lip being connected to the free end of the secondary sealing lip.

[0012] Preferably, when viewed in a cross-section perpendicular to the central axis of the annular substrate, the thickness of the main sealing lip varies in a gradient along its circumferential extension direction, gradually increasing from the region corresponding to the middle of the straight segment of the annular substrate to the region corresponding to the corner of the annular substrate; wherein, the thickness gradient region covers the straight extension segment of the main sealing lip, but does not extend to the arc segment corresponding to the corner of the annular substrate.

[0013] Preferably, the secondary sealing lip has a flexible buffer strip extending circumferentially on the side surface facing away from the sealing cavity; the flexible buffer strip is arranged on a straight section of the annular base, and is located in the middle region of the straight section between two adjacent corners, away from the corners.

[0014] Preferably, the flexible buffer strip is made of an elastic material and its thickness is less than that of the secondary sealing lip.

[0015] Preferably, the flexible buffer strip comprises:

[0016] The first flexible strip is provided along the circumferential extension direction of the annular matrix;

[0017] The second flexible strip is provided in a direction that extends perpendicular to the circumferential direction of the annular base;

[0018] The ratio of the dimension of the first flexible strip in the circumferential extension direction to the dimension of the second flexible strip in the direction perpendicular to the circumferential extension direction is basically in line with the ratio of the major axis dimension to the minor axis dimension of the outer contour of the annular matrix in the corresponding direction.

[0019] Preferably, the annular matrix, the main sealing lip, and the secondary sealing lip are all made of EPDM rubber or fluororubber; wherein the Shore hardness of the main sealing lip is 65HA-75HA, the Shore hardness of the secondary sealing lip is 60HA-70HA, and the Shore hardness of the annular matrix is ​​55HA-65HA.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] Compared with existing technologies, by setting a main sealing lip and a secondary sealing lip to form a multi-level sealing structure, combined with a sealing cavity with a U-shaped cross-section and gradually varying width, it can effectively prevent moisture, dust and other impurities from entering the battery pack, thus improving the sealing effect. The setting of the first and second dustproof lips further enhances the dustproof capability of the sealing ring, reduces the impact of dust on the internal components of the battery pack, and extends the service life of the battery pack. The gradient design of the thickness of the main sealing lip provides stronger structural strength at the corners of the annular base, which can better adapt to the stress at the corners during the assembly or use of the battery pack, avoid damage to the main sealing lip at the corners, and ensure the stability of the sealing performance. The design of the flexible buffer strip can play a buffering role when the battery pack is subjected to vibration or impact, reducing the hard collision between the secondary sealing lip and the battery pack shell, protecting the secondary sealing lip while ensuring that the sealing effect is not affected. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the sealing ring for the battery pack proposed in this utility model;

[0023] Figure 2 This is a top view of the sealing ring for the battery pack proposed in this utility model;

[0024] Figure 3 This is a bottom view of the sealing ring for the battery pack proposed in this utility model;

[0025] Figure 4 This is a cross-sectional view of the sealing ring for the battery pack proposed in this utility model.

[0026] In the figure: 1-sealing ring, 11-annular base, 12-first flexible strip, 13-main sealing lip, 14-secondary sealing lip, 15-second flexible strip, 16-first dustproof lip, 17-second dustproof lip, 18-sealing cavity. Detailed Implementation

[0027] 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.

[0028] like Figures 1-4 As shown, this embodiment provides a sealing ring for a battery pack, comprising:

[0029] Ring-shaped matrix 11;

[0030] The main sealing lip 13 and the secondary sealing lip 14 are provided to extend circumferentially along the same side of the annular base 11 and both extend outward from the main body of the annular base 11, and the height of the main sealing lip 13 is greater than the height of the secondary sealing lip 14.

[0031] The annular base 11, the main sealing lip 13, and the secondary sealing lip 14 together define a U-shaped sealing cavity 18, with the opening of the sealing cavity 18 facing the extension direction of the main sealing lip 13 and the secondary sealing lip 14.

[0032] On a cross-section perpendicular to the central axis of the annular base 11, the width of the sealing cavity 18 gradually decreases from the main body towards the opening direction.

[0033] Overall, the main sealing lip 13 and the secondary sealing lip 14 extend circumferentially along the same side of the annular base 11, and both extend outward from the main body of the annular base 11. The height of the main sealing lip 13 is greater than the height of the secondary sealing lip 14. Together with the annular base 11, they define a U-shaped sealing cavity 18. The opening of the sealing cavity 18 faces the extending direction of the main sealing lip 13 and the secondary sealing lip 14. On the cross-section perpendicular to the central axis of the annular base 11, the width of the sealing cavity 18 gradually decreases from the main body towards the opening. With this structure, the sealing cavity 18 can fit tightly against the battery pack shell during battery pack assembly, forming a good sealing effect and effectively preventing external impurities from entering.

[0034] like Figure 4 As shown, in this embodiment, a first dustproof lip 16 and a second dustproof lip 17 are also included. The first dustproof lip 16 is connected to the free end of the main sealing lip 13, and the second dustproof lip 17 is connected to the free end of the secondary sealing lip 14.

[0035] By setting the first dustproof lip 16 and the second dustproof lip 17, the main sealing lip 13 and the secondary sealing lip 14 are more tightly covered, which can further intercept dust and other small particles and prevent them from entering the sealing cavity 18, thereby better protecting the internal environment of the battery pack and extending the maintenance cycle and service life of the battery pack.

[0036] like Figures 3-4 As shown, in this embodiment, when viewed in a cross-section perpendicular to the central axis of the annular base 11, the thickness of the main sealing lip 13 varies in a gradient along its circumferential extension direction. The thickness gradually increases from the region of the main sealing lip 13 corresponding to the middle of the straight segment of the annular base 11 to the region corresponding to the corner of the annular base 11. The thickness gradient region covers the straight extension segment of the main sealing lip 13, but does not extend to the arc segment of the main sealing lip 13 corresponding to the corner of the annular base 11.

[0037] Specifically, in the actual use of the battery pack, the corners are often more susceptible to stress concentration. The structure of the main sealing lip 13 is further optimized. Through this thickness gradient design, the structural strength of the main sealing lip 13 at the corner is enhanced, effectively reducing the risk of tearing or other damage to the main sealing lip 13 at the corner, and ensuring the sealing performance of the sealing ring 1 during long-term use.

[0038] like Figure 3 As shown, in this embodiment, the secondary sealing lip 14 has a flexible buffer strip extending circumferentially on the side surface facing away from the sealing cavity 18; the flexible buffer strip is arranged on the straight section of the annular base 11, and is located in the middle region of the straight section between two adjacent corners, and away from the corners.

[0039] The flexible buffer strip is made of elastic material and its thickness is less than that of the secondary sealing lip 14.

[0040] Specifically, a flexible buffer strip extending circumferentially is provided on the side surface of the secondary sealing lip 14 facing away from the sealing cavity 18. The flexible buffer strip is made of elastic material and its thickness is less than that of the secondary sealing lip 14. When the battery pack is subjected to vibration or impact, the flexible buffer strip can undergo elastic deformation to absorb part of the impact force, reduce the direct collision between the secondary sealing lip 14 and the battery pack shell, protect the structural integrity of the secondary sealing lip 14, and ensure that the sealing effect is not reduced due to external impact.

[0041] like Figure 3 As shown, in this embodiment, the flexible buffer band includes:

[0042] The first flexible strip 12 is provided along the circumferential extension direction of the annular base 11;

[0043] The second flexible strip 15 is provided in a direction that extends perpendicular to the circumferential direction of the annular base 11;

[0044] The ratio of the dimension of the first flexible strip 12 in the circumferential extension direction to the dimension of the second flexible strip 15 in the direction perpendicular to the circumferential extension direction is basically corresponding to the ratio of the major axis dimension to the minor axis dimension of the outer contour of the annular base 11 in the corresponding direction.

[0045] This design allows the flexible buffer strip to better adapt to the shape characteristics of the annular substrate 11, providing uniform and suitable buffering performance in different directions. Regardless of which direction the battery pack is subjected to vibration or impact, the flexible buffer strip can play a good buffering role, further improving the reliability and stability of the sealing ring 1.

[0046] like Figures 1-3As shown, in this embodiment, the annular substrate 11, the main sealing lip 13, and the secondary sealing lip 14 are all made of EPDM rubber or fluororubber; wherein, the Shore hardness of the main sealing lip 13 is 65HA-75HA, the Shore hardness of the secondary sealing lip 14 is 60HA-70HA, and the Shore hardness of the annular substrate 11 is 55HA-65HA.

[0047] Specifically, the annular substrate 11, the main sealing lip 13, and the secondary sealing lip 14 are all made of EPDM rubber or fluororubber. The Shore hardness of the main sealing lip 13 is 70HA; the Shore hardness of the secondary sealing lip 14 is 65HA; and the Shore hardness of the annular substrate 11 is 60HA.

[0048] If the weather resistance and aging resistance of the sealing ring 1 are required, EPDM rubber can be selected as the raw material; if excellent high temperature resistance and chemical corrosion resistance are required, fluororubber can be selected as the raw material; in actual cases, the selection of materials depends on the actual working conditions and is not restricted here.

[0049] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0051] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A sealing ring for a battery pack, characterized in that, include: Ring matrix (11); Main sealing lip (13) and secondary sealing lip (14); the main sealing lip (13) and secondary sealing lip (14) are circumferentially extended along the same side of the annular base (11), and both extend outward from the main body of the annular base (11), and the height of the main sealing lip (13) is greater than the height of the secondary sealing lip (14); The annular base (11), the main sealing lip (13) and the secondary sealing lip (14) together define a U-shaped sealing cavity (18), with the opening of the sealing cavity (18) facing the extension direction of the main sealing lip (13) and the secondary sealing lip (14); On the cross section perpendicular to the central axis of the annular base (11), the width of the sealing cavity (18) gradually decreases from the main body towards the opening direction.

2. The sealing ring for a battery pack according to claim 1, characterized in that, It also includes a first dustproof lip (16) and a second dustproof lip (17), the first dustproof lip (16) being connected to the free end of the main sealing lip (13) and the second dustproof lip (17) being connected to the free end of the secondary sealing lip (14).

3. The sealing ring for a battery pack according to claim 1, characterized in that, When viewed in a cross section perpendicular to the central axis of the annular base (11), the thickness of the main sealing lip (13) varies in a gradient along its circumferential extension direction. The thickness gradually increases from the region of the main sealing lip (13) corresponding to the middle of the straight segment of the annular base (11) to the region corresponding to the corner of the annular base (11). The thickness gradient region covers the straight extension of the main sealing lip (13) but does not extend to the arc segment of the main sealing lip (13) corresponding to the corner of the annular base (11).

4. The sealing ring for a battery pack according to claim 2, characterized in that, The secondary sealing lip (14) has a flexible buffer strip extending circumferentially on the side surface facing away from the sealing cavity (18); the flexible buffer strip is arranged on a straight section of the annular base (11) and is located in the middle region of the straight section between two adjacent corners, away from the corners.

5. The sealing ring for a battery pack according to claim 4, characterized in that, The flexible buffer strip is made of elastic material and its thickness is less than that of the secondary sealing lip (14).

6. The sealing ring for a battery pack according to claim 4, characterized in that, The flexible buffer band includes: The first flexible strip (12) is provided along the circumferential extension direction of the annular matrix (11); The second flexible strip (15) is provided in a direction that extends perpendicular to the circumferential direction of the annular base (11); The ratio of the size of the first flexible strip (12) in the circumferential extension direction to the size of the second flexible strip (15) in the direction perpendicular to the circumferential extension direction is basically corresponding to the ratio of the major axis size to the minor axis size of the outer contour of the annular base (11) in the corresponding direction.

7. The sealing ring for a battery pack according to any one of claims 1-6, characterized in that, The annular matrix (11), the main sealing lip (13) and the secondary sealing lip (14) are all made of EPDM rubber or fluororubber; wherein the Shore hardness of the main sealing lip (13) is 65HA-75HA, the Shore hardness of the secondary sealing lip (14) is 60HA-70HA, and the Shore hardness of the annular matrix (11) is 55HA-65HA.

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