Sealing assembly for battery liquid injection hole and battery cover plate structure

Abstract

The utility model relates to the technical field of battery cover plate structures, in particular to a sealing assembly for a battery liquid injection hole and a battery cover plate structure, the battery liquid injection hole is arranged on a battery cover plate, the battery liquid injection hole is a stepped hole, and the sealing assembly comprises a first sealing element and a second sealing element, the two opposite sides of the first sealing piece are provided with a first concave part and a second concave part, the first concave part can contain the abutting piece, and the side wall of the second concave part is a first guide inclined face. The first end of the second sealing piece can be at least partially contained in the second concave part, the first end of the second sealing piece can abut against the first guide inclined face, and the second end of the second sealing piece can be arranged in the second stepped hole section in a matched mode. In the installation process of the first sealing element, the second sealing element can limit the stretching-in position of the first sealing element, the first sealing element can be rapidly installed, the installation smoothness of the first sealing element is guaranteed, meanwhile, the installation duration of the first sealing element is shortened, and the use feeling of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery cover plate structure technical field, especially a kind of sealing assembly for battery liquid injection hole and battery cover plate structure. BACKGROUND

[0002] With the vigorous development of new energy industry, electric vehicles gradually enter people's vision, and power battery as the core power supply of electric vehicle plays a pivotal role.

[0003] In the traditional power battery structure, a liquid injection hole for adding electrolyte is provided on the battery cover plate, and after secondary liquid injection, the liquid injection hole needs to be sealed to ensure the negative pressure environment in the battery shell to prevent external gas and moisture from entering the battery cell. The repeated charging and discharging process of the battery can cause electrolyte loss, resulting in a decrease in battery performance, and the electrolyte in the battery needs to be supplemented to ensure the normal operation of the battery.

[0004] In the existing process, most of the liquid injection holes are sealed by sealing structures after electrolyte injection. The existing sealing structure installation process is not positioned, which causes the sealing structure to be not smoothly installed and increases the installation time. INVENTION CONTENTS

[0005] To solve the above technical problems, in the first sealing member installation process, the second sealing member can limit the insertion position of the first sealing member, that is, the second sealing member guides and positions the first sealing member, realizes the quick installation of the first sealing member, ensures the smoothness of the first sealing member installation, shortens the installation time of the first sealing member, and improves the user's use experience.

[0006] The utility model provides a kind of sealing assembly for battery liquid injection hole, and the battery liquid injection hole is arranged on battery cover plate, and the battery liquid injection hole is stepped hole, and the stepped hole has first stepped hole section and second stepped hole section, and the diameter of the first stepped hole section is greater than the diameter of the second stepped hole section, and the sealing assembly includes:

[0007] First sealing member capable of being arranged in the first stepped hole section, the opposite sides of the first sealing member are provided with first recess and second recess, the first recess can accommodate abutting member, and the side wall of the second recess is first guide inclined surface;

[0008] Second sealing member, the first end of the second sealing member can be at least partially housed in the second recess, and the first end of the second sealing member can abut with the first guide inclined surface, and the second end of the second sealing member can be fitted in the second stepped hole section.

[0009] Further, a second guide slope is arranged on a radial end side of the first seal member, and the second guide slope is inclined toward the second recess.

[0010] Further, the second seal member comprises a guide portion and an abutting portion connected in sequence.

[0011] The guide portion can be at least partially accommodated in the first stepped hole segment, and can abut against the first guide slope.

[0012] A third guide slope is arranged on a side wall of a side of the abutting portion away from the guide portion, the abutting portion can extend into the second stepped hole segment, and the third guide slope can limit the extending position of the abutting portion during the extending process of the abutting portion into the second stepped hole segment.

[0013] Further, the first seal member can extend into the first stepped hole segment, and the guide portion can limit the extending position of the first seal member during the extending process of the first seal member into the first stepped hole segment.

[0014] Further, the guide portion satisfies at least one of the following features:

[0015] The length of the guide portion is 2.9-3.3mm.

[0016] The diameter of the guide portion is 6.05-6.3mm.

[0017] Further, the abutting portion satisfies at least one of the following features:

[0018] The length of the abutting portion is 1.8-2.0mm.

[0019] The diameter of the abutting portion is 5.25-5.5mm.

[0020] Further, the first seal member satisfies at least one of the following features:

[0021] The depth of the first recess along the axial direction of the first seal member is 0.4-0.6mm.

[0022] The depth of the second recess along the axial direction of the first seal member is 0.3-0.5mm.

[0023] Further, the first seal member is further provided with a third recess, and the third recess is arranged on the same side of the first seal member as the first recess.

[0024] Further, the axis of the first recess, the axis of the second recess and the axis of the third recess coincide.

[0025] The utility model discloses still protect a kind of battery cover plate structure, including battery cover plate and the sealing assembly for battery liquid injection hole as described above;

[0026] The battery cover plate is provided with battery liquid injection hole, the battery liquid injection hole is ladder hole, the ladder hole has first ladder hole section and second ladder hole section, and the diameter of the first ladder hole section is greater than the diameter of the second ladder hole section.

[0027] The first sealing element is arranged in the first ladder hole section, and the abutting portion of the second sealing element is matched in the second ladder hole section.

[0028] The utility model discloses the following beneficial effects are realized by implementing the embodiment:

[0029] The utility model discloses first recessed part and second recessed part are provided on the opposite sides of first sealing element, and first recessed part can accommodate abutting piece, and the side wall of second recessed part is first guide inclined plane, and such setting can realize that abutting piece part is placed in first recessed part, and abutting piece exerts the force of moving towards second ladder hole section to first sealing element, so that first sealing element is installed in first ladder hole section. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme of the utility model, the following will be to the embodiment or the description of prior art needed to use the drawing briefly introduced. Obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0031] Fig. 1 It is the sectional view of the first sealing element described in the embodiment of the utility model;

[0032] Fig. 2 It is the structural diagram of the first sealing element described in the embodiment of the utility model;

[0033] Fig. 3 It is the sectional view of the second sealing element described in the embodiment of the utility model;

[0034] Fig. 4 It is the structural diagram of the second sealing element described in the embodiment of the utility model;

[0035] Fig. 5 It is the structural diagram for showing the relative position relationship of the first sealing element and the second sealing element after the sealing assembly described in the embodiment of the utility model is arranged in battery liquid injection hole.

[0036] Fig. 6 This is a structural diagram of the battery cover structure described in this embodiment.

[0037] The corresponding reference numerals in the figure are as follows:

[0038] 1-First seal; 2-Second seal; 3-Battery cover; 11-First recess; 12-Second recess; 13-Third recess; 21-Guide; 22-Abutting part. Detailed Implementation

[0039] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0041] See appendix Figs. 1-6 This embodiment provides a sealing assembly for a battery filling hole. The battery filling hole is disposed on a battery cover plate 3. The battery filling hole is a stepped hole with a first stepped hole section and a second stepped hole section. The diameter of the first stepped hole section is larger than the diameter of the second stepped hole section. The sealing assembly includes: a first sealing member 1 that can be disposed in the first stepped hole section. The first sealing member 1 has a first recess 11 and a second recess 12 on opposite sides. The first recess 11 can accommodate an abutment member. The sidewall of the second recess 12 is a first guide slope. A second sealing member 2 has a first end that can be at least partially accommodated in the second recess 12 and can abut against the first guide slope. The second end of the second sealing member 2 can be fitted into the second stepped hole section.

[0042] It should be noted that: in this embodiment, the first sealing member 1 is provided with a first recess 11 and a second recess 12 on opposite sides, and the first recess 11 can accommodate the abutment, and the sidewall of the second recess 12 is a first guide slope. This arrangement enables the abutment to be placed in the first recess 11, and the abutment applies a force to the first sealing member 1 to move toward the second stepped hole section, so that the first sealing member 1 is installed in the first stepped hole section. During the installation of the first sealing member 1, the second sealing member 2 can restrict the insertion position of the first sealing member 1, that is, the second sealing member 2 guides and positions the first sealing member 1, so as to realize the quick installation of the first sealing member 1, ensure the smoothness of the installation of the first sealing member 1, and shorten the installation time of the first sealing member 1, thereby improving the user experience.

[0043] In this embodiment, the placement of the first sealing member 1 in the first stepped hole section is controlled by the abutment member. Thus, it can be seen that if the first sealing member 1 is not guided, the abutment member needs a large force to place the first sealing member 1 in the first stepped hole section.

[0044] In this embodiment, the second seal 2 extends into the second stepped hole section via the first stepped hole section, and the second seal 2 cooperates with the second stepped hole section. The abutting portion 22 of the second seal 2 is accommodated in the second stepped hole section, and the guiding portion 21 of the second seal 2 is accommodated in the first stepped hole section. The guiding portion 21 accommodated in the first stepped hole section can perform positioning and guidance during the process of the first seal 1 being placed in the first stepped hole section.

[0045] In some possible embodiments, the first stepped hole segment and the second stepped hole segment are at least one of a circular hole, an elongated hole, or an elliptical hole, and the first stepped hole segment and the second stepped hole segment are coaxially arranged, or the axis of the first stepped hole segment and the axis of the second stepped hole segment are intersected.

[0046] In this embodiment, both the first stepped hole segment and the second stepped hole segment are circular holes, and the first stepped hole segment and the second stepped hole segment are coaxially arranged.

[0047] In some possible embodiments, a second guide slope is provided on the radial end side of the first seal 1. The second guide slope is inclined toward the second recess 12. By providing the second guide slope, the first seal 1 can be guided and engaged with the first stepped hole section. That is, based on the guidance of the second seal 2 on the first seal 1, the first seal 1 is further guided with the first stepped hole section. This can further enable the rapid installation of the first seal 1, further ensure the smoothness of the installation of the first seal 1, and further shorten the installation time of the first seal 1.

[0048] In this embodiment, the second guide slope is disposed on the outer side wall of the first seal 1, and the second guide slope forms a conical structure around it. After the first seal 1 is placed in the first stepped hole section, the large diameter end of the conical structure is disposed away from the second stepped hole section, and the small diameter end of the conical structure is disposed close to the second stepped hole section.

[0049] In some possible embodiments, the second seal 2 includes a guide portion 21 and an abutment portion 22 connected in sequence; the guide portion 21 can be at least partially accommodated in the first stepped hole section and can abut against the first guide slope; a third guide slope is provided on the side wall of the abutment portion 22 away from the guide portion 21, the abutment portion 22 can extend into the second stepped hole section, and the third guide slope can limit the extension position of the abutment portion during the process of the abutment portion extending into the second stepped hole section. By providing a third guide slope on the abutment portion 22, it is possible to guide the third guide slope against the inner wall of the second stepped hole section during the process of the abutment portion 22 extending into the second stepped hole section, thereby realizing the installation guidance of the second seal 2, realizing the smooth installation of the second seal 2, and shortening the installation time of the second seal 2.

[0050] In this embodiment, it is sufficient to ensure that the diameter of the guide portion 21 is greater than the diameter of the abutting portion 22, and the specific difference in diameter between the two is not limited; the abutting portion 22 is completely accommodated in the second stepped hole section, the guide portion 21 is accommodated in the first stepped hole section, and a transition arc is provided at the connection between the guide portion 21 and the abutting portion 22.

[0051] With the abutment portion 22 fully accommodated within the second stepped hole section, the guide portion 21 is positioned within the first stepped hole section at a height of 30%-80% of the depth of the first stepped hole section. This ensures that the guide portion 21 has sufficient protrusion height within the first stepped hole section, enabling the guide portion 21 to position and guide the first seal 1 during sealing, thus facilitating the rapid installation of the first seal 1.

[0052] Specifically, the guide part 21 is positioned at a height of 30%-40%, 30%-50%, 30%-80%, 40%-60%, 40%-80%, 50%-80%, 60%-80%, or 70%-80% of the depth of the first stepped hole section.

[0053] In some possible embodiments, the first seal 1 can extend into the first stepped hole section, and the guide 21 can restrict the extension position of the first seal 1 during the process of the first seal 1 extending into the first stepped hole section. The guide 21 protrudes from the first stepped hole section and can position and guide the first seal 1 to achieve quick installation of the first seal 1, ensure the smoothness of the installation of the first seal 1, and shorten the installation time of the first seal 1.

[0054] In this embodiment, the second recess 12 is a conical structure, that is, the first guide slope surrounds to form a conical structure. When the first seal 1 is provided in the first stepped hole section, the large diameter end of the conical structure is located close to the second stepped hole section, and the small diameter end of the conical structure is located away from the second stepped hole section.

[0055] Specifically, the diameter of the guide portion 21 is smaller than the small diameter end of the conical structure formed by the second recess 12.

[0056] In some possible embodiments, the guide portion 21 satisfies at least one of the following features: the length of the guide portion 21 is 2.9-3.3 mm; the diameter of the guide portion 21 is 6.05-6.3 mm. By setting the guide portion 21 within the above range, it is possible to ensure that the guide portion 21 protrudes at a certain height in the first stepped hole section, and to ensure that the guide portion 21 can position and guide the first seal 1, that is, to ensure the stability of the positioning and guiding of the first seal 1.

[0057] In this embodiment, the length of the guide portion 21 is 2.9-3.0mm, 2.9-3.2mm, 2.9-3.3mm, 3.0-3.1mm, or 3.0-3.3mm, etc.; the diameter of the guide portion 21 is 6.05-6.1mm, 6.05-6.2mm, 6.1-6.3mm, 6.15-6.3mm, or 6.2-6.3mm, etc.

[0058] In some possible embodiments, the abutment portion 22 satisfies at least one of the following characteristics: the length of the abutment portion 22 is 1.8-2.0 mm; the diameter of the abutment portion 22 is 5.25-5.5 mm. By setting the abutment portion 22 within the above range, the connection length between the abutment portion 22 and the second stepped hole segment can be guaranteed, thereby ensuring the connection stability between the abutment portion 22 and the second stepped hole segment, and thus ensuring the sealing performance of the abutment portion 22 on the second stepped hole segment.

[0059] In this embodiment, the length of the abutment portion 22 is 1.8-1.9mm, 1.9-2.0mm, 1.85-2.0mm, or 1.95-2.0mm, etc.; the diameter of the abutment portion 22 is 5.25-5.3mm, 5.3-5.45mm, 5.3-5.5mm, 5.4-5.0mm, or 5.45-5.5mm, etc.

[0060] In some possible embodiments, the first seal 1 satisfies at least one of the following features: the depth of the first recess 11 along the axial direction of the first seal 1 is 0.4-0.6 mm; the depth of the second recess 12 along the axial direction of the first seal 1 is 0.3-0.5 mm. By setting the above range, the positioning guide length between the second recess 12 and the second seal 2 can be guaranteed while ensuring the overall strength of the first seal 1, thereby ensuring the guiding effect of the second seal 2 on the first seal 1.

[0061] In this embodiment, the depth of the first recess 11 is 0.4-0.5mm, 0.45-0.55mm, 0.4-0.6mm, 0.45-0.6mm, 0.5-0.55mm, or 0.5-0.6mm, etc.; the depth of the second recess 12 is 0.3-0.4mm, 0.3-0.5mm, 0.4-0.5mm, or 0.45-0.5mm, etc.

[0062] In some possible embodiments, the first seal 1 is further provided with a third recess 13, which is located on the same side as the first recess 11. By providing the third recess 13, the stress of the first seal 1 as a whole can be released, and the first seal 1 can be inserted into the first stepped hole section while avoiding stress fracture of the first seal 1.

[0063] In this embodiment, the space surrounded by the first recess 11 is a columnar structure, the third recess 13 is a circular structure, and the inner diameter of the third recess 13 is larger than the diameter of the second recess 12.

[0064] In some possible embodiments, the axis of the first recess 11, the axis of the second recess 12, and the axis of the third recess 13 coincide. This arrangement facilitates the processing of the first seal 1 and avoids making the first seal 1 too large, thereby reducing the manufacturing cost of the first seal 1.

[0065] This utility model also protects a battery cover structure, including a battery cover 3 and a sealing assembly for the battery injection hole as described above; the battery cover 3 is provided with a battery injection hole, which is a stepped hole, having a first stepped hole section and a second stepped hole section, the diameter of the first stepped hole section being larger than the diameter of the second stepped hole section; a first sealing member 1 is disposed in the first stepped hole section, and abutting part 22 of the second sealing member 2 is fitted into the second stepped hole section. The battery cover structure in this embodiment includes the sealing assembly for the battery injection hole as described above, thereby enabling the second sealing member 2 to restrict the insertion position of the first sealing member 1 during the installation process of the first sealing member 1, that is, the second sealing member 2 guides and positions the first sealing member 1, realizing the rapid installation of the first sealing member 1, ensuring the smoothness of the installation of the first sealing member 1, and shortening the installation time of the first sealing member 1, thus improving the user experience.

[0066] In some possible embodiments, the space surrounded by the inner wall of the first stepped hole segment is a conical structure or a cylindrical structure. When the space surrounded by the inner wall of the first stepped hole segment is a conical structure, the diameter of the end of the conical structure near the second stepped hole segment is smaller than the diameter of the end of the conical structure away from the second stepped hole segment.

[0067] In some possible embodiments, a fourth guide slope is provided at the position where the second stepped hole segment connects to the first stepped hole segment. The fourth guide slope is inclined toward the second recess 12. The fourth guide slope cooperates with the third guide slope to provide positioning guidance when the second seal 2 is placed in the second stepped hole segment, thereby enabling quick installation of the second seal 2.

[0068] In this embodiment, the sum of the depths of the first stepped hole segment and the second stepped hole segment is equal to the thickness of the battery cover structure; the depth ratio between the first stepped hole segment and the second stepped hole segment is not limited, as long as the first stepped hole segment can accommodate the first sealing member 1 and the second stepped hole segment can have a sufficient sealing length with the second sealing member.

[0069] The installation process of the sealing assembly for the battery filling hole is as follows: The second seal 2 is installed in the battery filling hole, and the abutment portion 22 of the second seal 2 is connected to the second stepped hole section. The guide portion 21 of the second seal 2 is accommodated in the first stepped hole section. The abutment is placed in the first recess 11, and the abutment drives the first seal 1 to move toward the second seal 2. The guide portion 21 cooperates with the first guide slope on the second recess 12 to achieve positioning and guidance of the first seal 1. The abutment drives the first seal 1 to be placed in the first stepped hole section. At this time, the installation of the first seal 1 and the second seal 2 is completed.

[0070] Example 1

[0071] See appendix Figs. 1-6This embodiment provides a sealing assembly for a battery filling hole. The battery filling hole is disposed on a battery cover plate 3. The battery filling hole is a stepped hole with a first stepped hole section and a second stepped hole section. The diameter of the first stepped hole section is larger than the diameter of the second stepped hole section. The sealing assembly includes: a first sealing member 1 that can be disposed in the first stepped hole section. The first sealing member 1 has a first recess 11 and a second recess 12 on opposite sides. The first recess 11 can accommodate an abutment member. The sidewall of the second recess 12 is a first guide slope. A second sealing member 2 has a first end that can be at least partially accommodated in the second recess 12 and can abut against the first guide slope. The second end of the second sealing member 2 can be fitted into the second stepped hole section.

[0072] In this embodiment, the second seal 2 extends into the second stepped hole section via the first stepped hole section, and the second seal 2 cooperates with the second stepped hole section. The abutting portion 22 of the second seal 2 is accommodated in the second stepped hole section, and the guiding portion 21 of the second seal 2 is accommodated in the first stepped hole section. The guiding portion 21 accommodated in the first stepped hole section can perform positioning and guidance during the process of the first seal 1 being placed in the first stepped hole section.

[0073] In this embodiment, both the first stepped hole segment and the second stepped hole segment are circular holes, and the first stepped hole segment and the second stepped hole segment are coaxially arranged, with the diameter of the first stepped hole segment being larger than the diameter of the second stepped hole segment.

[0074] In this embodiment, the space surrounded by the inner wall of the first stepped hole segment is a conical structure, and the diameter of the end of the conical structure near the second stepped hole segment is smaller than the diameter of the end of the conical structure away from the second stepped hole segment.

[0075] In this embodiment, a fourth guide slope is provided at the position where the second stepped hole section connects to the first stepped hole section. The fourth guide slope is inclined toward the second recess 12. The fourth guide slope cooperates with the third guide slope to provide positioning guidance when the second seal 2 is placed in the second stepped hole section, thereby enabling the quick installation of the second seal 2.

[0076] In this embodiment, the sum of the depths of the first stepped hole segment and the second stepped hole segment is equal to the thickness of the battery cover structure; the depth ratio between the first stepped hole segment and the second stepped hole segment is not limited, as long as the first stepped hole segment can accommodate the first sealing member 1 and the second stepped hole segment can have a sufficient sealing length with the second sealing member.

[0077] In this embodiment, the first seal 1 satisfies at least one of the following features: the depth of the first recess 11 along the axial direction of the first seal 1 is 0.4-0.6 mm; and the depth of the second recess 12 along the axial direction of the first seal 1 is 0.3-0.5 mm.

[0078] In this embodiment, the second recess 12 is a conical structure, that is, the first guide slope surrounds to form a conical structure. When the first seal 1 is provided in the first stepped hole section, the large diameter end of the conical structure is located close to the second stepped hole section, and the small diameter end of the conical structure is located away from the second stepped hole section.

[0079] Specifically, the diameter of the guide portion 21 of the second seal 2 is smaller than the small diameter end of the conical structure formed by the second recess 12.

[0080] In this embodiment, a second guide slope is provided on the radial end side of the first seal 1, and the second guide slope is inclined toward the second recess 12.

[0081] In this embodiment, the second guide slope is disposed on the outer side wall of the first seal 1, and the second guide slope forms a conical structure around it. After the first seal 1 is placed in the first stepped hole section, the large diameter end of the conical structure is disposed away from the second stepped hole section, and the small diameter end of the conical structure is disposed close to the second stepped hole section.

[0082] In this embodiment, the first sealing member 1 is further provided with a third recess 13, which is located on the same side of the first recess 11, and the axis of the first recess 11, the axis of the second recess 12, and the axis of the third recess 13 coincide.

[0083] In this embodiment, the space surrounded by the first recess 11 is a columnar structure, the third recess 13 is a circular structure, and the inner diameter of the third recess 13 is larger than the diameter of the second recess 12.

[0084] In this embodiment, the second sealing member 2 includes a guide portion 21 and an abutment portion 22 connected in sequence; the guide portion 21 can be at least partially accommodated in the first stepped hole section and can abut against the first guide slope; a third guide slope is provided on the side wall of the abutment portion 22 away from the guide portion 21, the abutment portion 22 can extend into the second stepped hole section, and the third guide slope can limit the extension position of the abutment portion during the process of the abutment portion extending into the second stepped hole section.

[0085] In this embodiment, it is sufficient to ensure that the diameter of the guide portion 21 is greater than the diameter of the abutting portion 22, and the specific difference in diameter between the two is not limited; the abutting portion 22 is completely accommodated in the second stepped hole section, the guide portion 21 is accommodated in the first stepped hole section, and a transition arc is provided at the connection between the guide portion 21 and the abutting portion 22.

[0086] With the abutment portion 22 fully accommodated within the second stepped hole section, the guide portion 21 is positioned at a height of 30%-80% of the depth of the first stepped hole section, thus ensuring that the guide portion 21 has sufficient protrusion height within the first stepped hole section.

[0087] In this embodiment, the first seal 1 can extend into the first stepped hole section, and the guide 21 can restrict the extension position of the first seal 1 during the process of the first seal 1 extending into the first stepped hole section.

[0088] In this embodiment, the guide portion 21 satisfies at least one of the following features: the length of the guide portion 21 is 2.9-3.3 mm; the diameter of the guide portion 21 is 6.05-6.3 mm.

[0089] In this embodiment, the abutting portion 22 satisfies at least one of the following features: the length of the abutting portion 22 is 1.8-2.0 mm; the diameter of the abutting portion 22 is 5.25-5.5 mm.

[0090] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and variations without departing from the scope of the present invention.

[0091] In this document, the directional terms such as front, back, top, and bottom are defined according to the positions of the components in the accompanying drawings and the positions between the components, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed by this utility model.

[0092] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0093] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A sealing assembly for a battery filling hole, the battery filling hole being disposed on a battery cover plate (3), the battery filling hole being a stepped hole having a first stepped hole section and a second stepped hole section, the diameter of the first stepped hole section being larger than the diameter of the second stepped hole section, characterized in that, The sealing assembly includes: A first sealing member (1) can be set in the first stepped hole section. The first sealing member (1) has a first recess (11) and a second recess (12) on opposite sides. The first recess (11) can accommodate the abutment, and the sidewall of the second recess (12) is a first guide slope. The second seal (2) has a first end that can be at least partially accommodated in the second recess (12), and the first end of the second seal (2) can abut against the first guide slope, and the second end of the second seal (2) can fit into the second stepped hole section.

2. The sealing assembly for the battery filling hole according to claim 1, characterized in that, The first seal (1) is provided with a second guide slope on its radial end side, and the second guide slope is inclined toward the second recess (12).

3. The sealing assembly for the battery filling hole according to claim 1, characterized in that, The second seal (2) includes a guide portion (21) and an abutment portion (22) connected in sequence; The guide portion (21) can be at least partially accommodated in the first stepped hole section and can abut against the first guide slope. A third guide slope is provided on the side wall of the abutment part (22) away from the guide part (21). The abutment part (22) can extend into the second stepped hole section. The third guide slope can restrict the extension position of the abutment part during the process of the abutment part extending into the second stepped hole section.

4. The sealing assembly for the battery filling port according to claim 3, characterized in that, The first seal (1) can extend into the first stepped hole section, and the guide (21) can restrict the extension position of the first seal (1) during the process of the first seal (1) extending into the first stepped hole section.

5. The sealing assembly for the battery filling port according to claim 3, characterized in that, The guide portion (21) satisfies at least one of the following characteristics: The length of the guide portion (21) is 2.9-3.3 mm; The diameter of the guide part (21) is 6.05-6.3 mm.

6. The sealing assembly for the battery filling port according to claim 3, characterized in that, The contact portion (22) satisfies at least one of the following characteristics: The length of the contact portion (22) is 1.8-2.0 mm; The diameter of the contact portion (22) is 5.25-5.5 mm.

7. The sealing assembly for a battery filling port according to any one of claims 1-6, characterized in that, The first seal (1) satisfies at least one of the following characteristics: Along the axial direction of the first seal (1), the depth of the first recess (11) is 0.4-0.6 mm; Along the axial direction of the first seal (1), the depth of the second recess (12) is 0.3-0.5 mm.

8. The sealing assembly for a battery filling port according to any one of claims 1-6, characterized in that, The first sealing member (1) is also provided with a third recess (13), which is located on the same side of the first sealing member (1) as the first recess (11).

9. The sealing assembly for a battery filling port according to any one of claims 1-6, characterized in that, The axis of the first recess (11), the axis of the second recess (12), and the axis of the third recess (13) coincide.

10. A battery cover structure, characterized in that, Includes a battery cover (3) and a sealing assembly for the battery filling hole as described in any one of claims 1-9; The battery cover plate (3) is provided with a battery injection hole. The battery injection hole is a stepped hole. The stepped hole has a first stepped hole section and a second stepped hole section. The diameter of the first stepped hole section is larger than the diameter of the second stepped hole section. The first seal (1) is disposed in the first stepped hole section, and the abutting part (22) of the second seal (2) is fitted in the second stepped hole section.

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