Liquid injection hole sealing structure and assembling structure

Abstract

The utility model discloses a liquid injection hole sealing structure and an assembling structure, which comprise a rubber plug, a sealing ring and a sealing ring, the sealing nail is provided with a positioning protrusion, the positioning protrusion is of a circular truncated cone structure, and the upper end of the positioning protrusion is in interference fit with the positioning groove; according to the utility model, the positioning bulge plays a role in positioning and guiding, and the sealing nail is centered in the liquid injection hole in the process of pressing the positioning bulge into the positioning groove, so that the problems of non-uniform weld joints and poor welding caused by deviation of the sealing nail are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a liquid injection hole sealing structure and an assembly structure. Background Art

[0002] Currently, the sealing pin is placed at the battery filling hole by a device, but the device cannot guarantee whether the sealing pin is centered after placement, and there is no locator-like thing on the battery to limit the deviation of the sealing pin;

[0003] Currently, during the battery sealing pin welding process, the sealing pin may not be centered. If the size of the gap is not adjusted in time, there is a greater risk of poor welding. Utility Model Content

[0004] The main purpose of the utility model is to provide a liquid injection hole sealing structure and an assembly structure, aiming to solve the existing technical problems.

[0005] In order to achieve the above object, the utility model provides a liquid injection hole sealing structure, comprising:

[0006] A rubber plug, the top of which is provided with a positioning groove;

[0007] The sealing nail is provided with a positioning protrusion, the positioning protrusion is in a truncated cone structure, and the upper end of the positioning protrusion is interference-fitted with the positioning groove.

[0008] Furthermore, the diameter of the lower end of the positioning protrusion is smaller than the diameter of the positioning groove, and the diameter of the upper end of the positioning protrusion is larger than the diameter of the positioning groove.

[0009] Furthermore, the rubber plug includes a sealing seat, the sealing seat is connected to a sealing joint, a side wall of the sealing joint is provided with three vertical sections, and a diameter of the sealing joint is smaller than a diameter of the sealing seat.

[0010] Furthermore, an upper annular sheet is provided on the surface of the positioning protrusion, an upper convex sheet is provided in the positioning groove, and the sealing pin is connected to the rubber plug so that the upper annular sheet breaks through the upper convex sheet to block and limit the position.

[0011] Furthermore, an annular sealing strip is provided on the side surface of the sealing nail.

[0012] A liquid injection hole sealing assembly structure comprises a cover plate, on which a liquid injection hole is opened, an annular groove is arranged on the cover plate, and further comprises:

[0013] As in the above-mentioned sealing structure for the injection hole, a positioning convex ring is provided on the sealing pin, and the positioning convex ring cooperates with the annular groove.

[0014] Furthermore, the cross section of the positioning protruding ring is trapezoidal.

[0015] Furthermore, the width of the lower end of the positioning protruding ring is smaller than the width of the annular groove, and the width of the upper end is equal to the width of the annular groove.

[0016] Furthermore, a lower annular sheet is provided on the surface of the rubber plug, a lower convex sheet is provided in the annular groove, and the rubber plug is connected to the annular groove so that the lower annular sheet breaks through the obstruction of the lower convex sheet and is limited.

[0017] The beneficial effects of the utility model are embodied in:

[0018] In the utility model, the positioning protrusion plays a positioning and guiding role. When the positioning protrusion is pressed into the positioning groove, the sealing pin is centered in the injection hole, thereby avoiding the problem of uneven welds and poor welding caused by the deviation of the sealing pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 3 This is a schematic diagram of the rubber plug structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the sealing nail structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the assembly structure of the utility model;

[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the structure front view;

[0025] Figure 7 For this utility model Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0026] Description of reference numerals:

[0027] 100, rubber plug; 101, positioning groove; 1011, upper protrusion; 102, sealing seat; 103, sealing joint; 104, lower annular piece; 200, sealing nail; 201, positioning protrusion; 202, upper annular piece; 203, annular sealing strip; 204, positioning convex ring; 300, cover plate; 301, annular groove; 3011, lower protrusion. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-3 The utility model provides a liquid injection hole sealing structure, comprising:

[0030] The rubber plug 100 has a positioning groove 101 on its top;

[0031] The sealing nail 200 is provided with a positioning protrusion 201 . The positioning protrusion 201 is in a truncated cone structure. The upper end of the positioning protrusion 201 is interference fit with the positioning groove 101 .

[0032] In this embodiment, the positioning protrusion 201 plays a positioning and guiding role. When the positioning protrusion 201 is pressed into the positioning groove 101, the sealing pin 200 is centered in the injection hole, avoiding the problem of uneven welds and poor welding caused by the deviation of the sealing pin 200.

[0033] In one embodiment, the diameter of the lower end of the positioning protrusion 201 is smaller than the diameter of the positioning groove 101 , and the diameter of the upper end of the positioning protrusion 201 is larger than the diameter of the positioning groove 101 .

[0034] This embodiment is configured in this way. Since the diameter of the positioning protrusion 201 gradually increases from bottom to top, the positioning protrusion 201 plays a positioning and guiding role.

[0035] In one embodiment, see Figure 3 The rubber plug 100 includes a sealing seat 102, which is connected to a sealing joint 103. The side wall of the sealing joint 103 is provided with three vertical sections, and the diameter of the sealing joint 103 is smaller than the diameter of the sealing seat 102. This embodiment is arranged in this way to ensure that the rubber plug is tightly connected to the injection hole on the lithium battery cover plate, and the sealing performance is good.

[0036] In one embodiment, see Figure 2 An upper annular sheet 202 is provided on the surface of the positioning protrusion 201, an upper convex sheet 1011 is provided in the positioning groove 101, and the sealing nail 200 is connected to the rubber plug 100 so that the upper annular sheet 202 breaks through the upper convex sheet 1011 to block and limit.

[0037] This embodiment is configured such that when the rubber plug 100 is connected to the sealing pin 200, the upper annular piece 202 extends into the positioning groove 101 and breaks through the upper protruding piece 1011 until the rubber plug 100 and the sealing pin 200 are completely connected, thereby improving the connection strength between the two and preventing the problem of easy separation.

[0038] In one embodiment, see Figure 4 , an annular sealing strip 203 is provided on the side of the sealing pin 200. This embodiment is arranged in this way, and the sealing effect can be further improved after the sealing pin 200 is assembled.

[0039] The utility model also provides a liquid injection hole sealing assembly structure, see Figure 5-7 , including a cover plate 300, on which a liquid injection hole is opened, and an annular groove 301 is provided on the cover plate 300, and also including,

[0040] As in the above-mentioned sealing structure of the injection hole, a positioning protruding ring 204 is provided on the sealing pin 200 , and the positioning protruding ring 204 cooperates with the annular groove 301 .

[0041] During assembly of this embodiment, the rubber plug 100 is installed in the injection hole of the cover plate 300, the sealing pin 200 is pressed downward, and the lower end of the positioning protrusion 201 first enters the positioning groove 101. Since the diameter of the lower end of the positioning protrusion 201 is smaller than the diameter of the positioning groove 101, even if the sealing pin 200 has a slight deviation, the positioning protrusion 201 can be accurately inserted into the positioning groove 101. In the process of pressing the positioning protrusion 201 into the positioning groove 101, the sealing pin 200 is centered in the injection hole, avoiding the problem of uneven welds and poor welding caused by the deviation of the sealing pin 200. The cooperation between the positioning protrusion ring 204 and the annular groove 301 can further improve the positioning effect.

[0042] In one embodiment, the cross section of the positioning protruding ring 204 is in a trapezoidal shape.

[0043] In one embodiment, the lower width of the positioning protrusion 204 is smaller than the width of the annular groove 301, and the upper width is equal to the width of the annular groove 301. In this embodiment, since the diameter of the positioning protrusion 204 gradually increases from bottom to top, the positioning protrusion 204 plays a positioning and guiding role.

[0044] In one embodiment, see Figure 7 A lower annular sheet 104 is provided on the surface of the rubber plug 100, and a lower convex sheet 3011 is provided in the annular groove 301. The rubber plug 100 is connected to the annular groove 301 so that the lower annular sheet 104 breaks through the obstruction of the lower convex sheet 3011 and is limited.

[0045] This embodiment is configured such that when the sealing pin 200 is connected to the cover plate 300, the lower annular sheet 104 extends into the annular groove 301 and breaks through the lower protrusion 3011 until the sealing pin 200 and the cover plate 300 are completely connected, thereby improving the connection strength between the two and preventing the problem of easy separation.

[0046] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid injection hole sealing structure, characterized in that ,include: The rubber plug (100) has a positioning groove (101) on its top; A sealing nail (200) is provided with a positioning protrusion (201), wherein the positioning protrusion (201) is in a truncated cone structure, and the upper end of the positioning protrusion (201) is interference-fitted with the positioning groove (101); An upper annular sheet (202) is provided on the surface of the positioning protrusion (201), an upper convex sheet (1011) is provided in the positioning groove (101), and the sealing pin (200) is connected to the rubber plug (100) so that the upper annular sheet (202) breaks through the upper convex sheet (1011) to block and limit the position.

2. A liquid injection hole sealing structure according to claim 1, characterized in that: The diameter of the lower end of the positioning protrusion (201) is smaller than the diameter of the positioning groove (101), and the diameter of the upper end of the positioning protrusion (201) is larger than the diameter of the positioning groove (101).

3. A liquid injection hole sealing structure according to claim 1, characterized in that: The rubber plug (100) comprises a sealing seat (102), wherein the sealing seat (102) is connected to a sealing joint (103), a side wall of the sealing joint (103) is provided with three vertical sections, and a diameter of the sealing joint (103) is smaller than a diameter of the sealing seat (102).

4. A liquid injection hole sealing structure according to claim 1, characterized in that: An annular sealing strip (203) is provided on the side surface of the sealing nail (200).

5. A liquid injection hole sealing assembly structure, comprising a cover plate (300) on which a liquid injection hole is opened, characterized in that: The cover plate (300) is provided with an annular groove (301), and further comprises: According to the injection hole sealing structure according to any one of claims 1 to 4, a positioning convex ring (204) is provided on the sealing pin (200), and the positioning convex ring (204) cooperates with the annular groove (301).

6. A liquid injection hole sealing assembly structure as claimed in claim 5, characterized in that: The cross section of the positioning protruding ring (204) is in a trapezoidal shape.

7. A liquid injection hole sealing assembly structure as claimed in claim 5, characterized in that: The width of the lower end of the positioning protruding ring (204) is smaller than the width of the annular groove (301), and the width of the upper end is equal to the width of the annular groove (301).

8. The sealing assembly structure of a liquid injection hole according to claim 5, characterized in that: A lower annular sheet (104) is provided on the surface of the rubber plug (100), a lower convex sheet (3011) is provided in the annular groove (301), and the rubber plug (100) is connected to the annular groove (301) so that the lower annular sheet (104) breaks through the obstruction of the lower convex sheet (3011) and is limited.

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