Top cover assembly

Abstract

The utility model discloses a top cover assembly and relates to the technical field of batteries. Comprising a cover body, a pole and an upper plastic component, the cover body is provided with a mounting hole for mounting the pole, the pole comprises an inner limiting part and an outer extending part, the outer extending part is provided with an annular clamping groove, and the upper plastic component is sleeved at the annular clamping groove so as to be matched with the inner limiting part for limiting. And further, the pole is fixed at the mounting hole. According to the top cover assembly provided by the utility model, the pole can be correspondingly combined with the upper plastic assembly so as to be stably fixed at the corresponding pole mounting hole of the cover plate, and a stable sealing structure is formed at the corresponding pole mounting hole, so that the top cover assembly is high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a top cover assembly. Background Art

[0002] The top cover assembly includes a cover plate and a pole column installed on the cover plate, etc. The top cover assembly has a significant impact on the safety of the battery. Generally speaking, there needs to be good sealing between the cover plate and the pole column of the top cover assembly to prevent air, moisture, etc. from entering the battery interior and to prevent the leakage of the electrolyte inside the battery; at the same time, it is also necessary to ensure the stability of the connection between the pole column and the cover plate to prevent the connection between the pole column and the cover plate from loosening when the pole column is subjected to external forces, resulting in the safety risks of external moisture entering the battery and electrolyte leakage, so as to ensure the safety of the battery.

[0003] However, since the cover plate and the pole column in the top cover assembly are two independent components, and the pole column in the prior art is usually set as a cylindrical shape, although the sealing member provided between the cover plate and the pole column can achieve the sealed connection between the cover plate and the pole column, when the battery is used for assembling a battery pack, etc., the pole column often receives a large torque and tensile force, resulting in circumferential and axial relative displacements between the pole column and the cover plate, and the relative looseness between the pole column and the cover plate, damaging the sealing performance and connection strength of the top cover assembly, and having a greater impact on the safety performance of the battery. Summary of the Utility Model

[0004] The utility model provides a top cover assembly, in which the pole column can be correspondingly combined with the upper plastic component to be stably fixed at the corresponding pole column installation hole of the cover plate, and a stable sealing structure is formed at the corresponding pole column installation hole to solve the above technical problems.

[0005] The technical solution adopted by the utility model to solve the above problems is: to provide a top cover assembly, including a cover body, a pole column, and an upper plastic component. An installation hole for installing the pole column is opened on the cover body. The pole column includes an inner limiting part and an outer protruding part. An annular card slot is opened on the outer protruding part. The upper plastic component is sleeved on the annular card slot to cooperate with the inner limiting part for limiting, so as to fix the pole column at the installation hole.

[0006] Furthermore, a first locking notch is provided in the annular card slot, and a first locking part corresponding to it is provided on the upper plastic component for extending into the first locking notch.

[0007] Furthermore, a second locking groove is also opened at the upper end surface of the outer protruding part. A second locking part is provided in the second locking groove. A first through hole communicating with the annular card slot is opened at the bottom of the second locking groove. A connecting piece is provided in the first through hole. The upper end of the connecting piece is fixedly connected to the second locking part, and the lower end is fixedly connected to the upper plastic component.

[0008] Further, a third locking groove is also provided in the first through hole, and a third locking member for inserting into the third locking groove is integrally provided on the connecting member correspondingly.

[0009] Further, it further includes a locking bracket arranged in the socket hole of the upper plastic component, and a composite slot hole structure for adapting to the locking bracket is correspondingly formed on the outer protruding portion.

[0010] Further, it further includes a second through hole communicating with the inside of the composite slot hole structure and extending to the upper end surface of the outer protruding portion.

[0011] Further, a plurality of clamping protrusions are evenly arranged in a circumferential direction at the bottom of the upper plastic component, and a plurality of clamping grooves are correspondingly and evenly formed around the mounting hole on the cover body, and the clamping protrusions and the clamping grooves are mutually adapted.

[0012] Further, it further includes a sealing ring body arranged between the cover body and the inner limiting portion.

[0013] Further, it further includes an explosion-proof valve arranged on the cover body and an explosion-proof valve protection piece arranged on the cover body.

[0014] Further, a liquid injection hole is also formed on the cover body.

[0015] Advantages of the present utility model:

[0016] For a battery top cover assembly of the present utility model, the upper plastic component forms a clamping structure with the inner limiting portion of the pole column by sleeving with the annular slot of the pole column, so as to clamp and fix the whole pole column at the corresponding pole column mounting hole on the cover body to fix the pole column.

[0017] Moreover, the upper plastic component is also tightly combined with the cover body through a plurality of clamping protrusions at its bottom end, and is further locked and connected with the pole column through the first locking member, so that while the pole column is clamped and fixed by the upper plastic component, it is further restricted from rotating by the upper plastic component, thereby further improving the installation quality of the pole column, ensuring the power supply quality of the pole column of the battery or the battery cell, and enhancing the use safety of the battery or the battery cell. Description of the drawings

[0018] The drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model. In these drawings, similar reference numerals are used to denote similar elements. The following drawings in the description are some embodiments of the present utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1The overall structure diagram of the top cover assembly of this embodiment;

[0020] Figure 2 The exploded view of the partial structure of the top cover assembly of this embodiment;

[0021] Figure 3 The perspective view of the structure of the terminal post of this embodiment;

[0022] Figure 4 The sectional view of the terminal post of this embodiment;

[0023] Figure 5 One of the structure diagrams of the upper plastic component of this embodiment (in the top view direction);

[0024] Figure 6 The second structure diagram of the upper plastic component of this embodiment (in the bottom view direction)

[0025] 1 - cover body, 11 - mounting hole, 12 - clamping groove, 2 - terminal post, 21 - inner limiting part, 22 - outer protruding part, 23 - annular clamping groove, 24 - first locking notch, 25 - second locking groove, 26 - first through hole, 27 - third locking groove, 28 - composite slot hole structure, 29 - second through hole, 3 - upper plastic component, 31 - first locking part, 32 - second locking part, 33 - connecting part, 34 - third locking part, 35 - locking bracket, 36 - clamping protrusion. Detailed implementation manners

[0026] In this specification, the orientation terms such as up, down, left, right, front, back, front side, back side, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the structures shown in the respective drawings. The terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. They are relative concepts and may accordingly change depending on their different positions and different usage states. Therefore, these or other orientation terms should not be construed as restrictive terms.

[0027] Please refer to Figures 1 to 6 , a top cover assembly of a specific embodiment of the present utility model mainly includes a cover body 1, a terminal post 2, and an upper plastic component 3. An installation hole 11 for installing the terminal post 2 is provided on the cover body 1. The terminal post 2 includes an inner limiting part 21 and an outer protruding part 22. An annular clamping groove 23 is provided on the outer protruding part 22. The upper plastic component 3 is sleeved on the annular clamping groove 23 to cooperate with the inner limiting part 21 for mutual limiting, thereby fixing the terminal post 2 at the installation hole 11.

[0028] Specifically, one mounting hole 11 is symmetrically provided on each of the two sides of the cover body 1. Two pole columns 2 are installed at the two mounting holes 11. The pole columns 2 include two types, a positive pole column and a negative pole column, and the polarities of the pole columns 2 installed at the two mounting holes 11 are opposite. The pole column 2 includes an inner limiting portion 21 and an outer protruding portion 22. The inner limiting portion 21 is a direction plate-like structure and its size is larger than the size of the mounting hole 11. The outer protruding portion 22 is a cylinder with a diameter smaller than that of the mounting hole 11. An annular slot 23 is also provided on the outer protruding portion 22. The pole column 2 is inserted into the mounting hole 11 through the outer protruding portion 22. When the pole column 2 is inserted into the mounting hole 11, a plastic component 3 is sleeved on the annular slot 23 of the outer protruding portion 22, and the size of the plastic component 3 is also larger than the size of the mounting hole 11, so that the plastic component 3 and the inner limiting portion 21 can be respectively located on the outer side and the inner side of the cover body 1 to form a clamping structure with each other, thereby integrally limiting and fixing the pole column 2 at the mounting hole 11 and installing the pole column 2 on the cover body 1.

[0029] Further, in this embodiment, a first locking notch 24 is provided in the annular slot 23. The first locking notch 24 is an open slot directly opened at the bottom of the arc-shaped slot of the annular slot 23. The bottom surface of this slot is a plane different from the arc-shaped bottom of the annular slot 23. A first locking member 31 adapted to the open first locking notch 24 is provided on the hole wall of the corresponding socket hole of the plastic component 3. Thus, when the plastic component 3 is provided at the annular slot 23, the plastic component 3 also realizes rotational limit relative to the pole column 2 by making the first locking member 31 located in the first locking notch 24.

[0030] Moreover, in order to further limit the rotation of the pole column 2 relative to the cover body 1, a plurality of block-shaped clamping protrusions 36 are provided around the socket hole at the bottom of the plastic component 3, and a plurality of clamping grooves 12 are provided around the mounting hole 11 on the upper end surface of the cover body 1. Thus, when the plastic component 3 is sleeved on the annular slot 23, the clamping protrusions 36 can be correspondingly located in the clamping grooves 12, and the plastic component 3 cannot rotate relative to the cover body 1, thereby preventing the pole column 2 from rotating relative to the cover body 1 and avoiding the pole column 2 from rotating and scratching other materials or components in the battery or the battery cell, which affects the use safety of the battery.

[0031] Further, to further enhance the connection stability between the upper plastic component 3 and the pole column 2, one or more second locking grooves 25 are evenly circumferentially formed on the upper end surface of the outer protruding portion 22. The second locking grooves 25 are arc-shaped grooves, and a first through hole 26 extending to the annular card slot 23 is provided at the bottom of the second locking groove 25. A second locking member 32 is arranged in the second locking groove 25. The bottom of the second locking member 32 is integrally connected to a connecting member 33. The lower end of the connecting member 33 extends into the annular card slot 23 to be integrally connected with the upper plastic component 3. The upper plastic component 3 correspondingly forms a second limiting structure with the pole column 2 through the second locking groove 25, the second locking member 32, and the connecting member 33, ensuring that the upper plastic component 3 can be stably sleeved at the annular card slot 23.

[0032] In addition, a third locking groove 27 is radially formed in the first through hole 26. A third locking member 34 is correspondingly arranged on the connecting member 33. The third locking member 34 is a cylinder, and the third locking groove 27 is a cylindrical hole. The third locking member 34 is inserted into the third locking groove 27 correspondingly to further strengthen the limiting effect of the second limiting structure.

[0033] Further, an "X"-shaped locking bracket 35 is integrally arranged in the socket hole of the upper plastic component 3, and a composite slot hole structure 28 adapted to the shape of the locking bracket 35 is correspondingly arranged on the outer protruding portion 22. The locking bracket 35 and the composite slot hole structure 28 cooperate with each other to further prevent the upper plastic component 3 from falling off.

[0034] It should be noted that in this embodiment, the upper plastic component 3 is manufactured by injection molding after the pole column 2 is installed in the installation hole 11. At the same time, during the injection molding process of manufacturing the upper plastic component 3, the first locking member 31, the second locking member 32, the connecting member 33, the third locking member 34, the locking bracket 35, and the clamping protrusion 36 are also injection molded together.

[0035] To accelerate the cooling and solidification speed of the upper plastic component 3, a second through hole 29 communicating with the composite slot hole structure 28 is further formed at the center of the upper end surface of the outer protruding portion 22. The second through hole 29 can be correspondingly used for heat dissipation to accelerate the cooling and fixing speed of the plastic liquid in the composite slot hole structure 28 located in the outer protruding portion 22.

[0036] In addition, when the pole column 2 is inserted into the installation hole 11, a sealing ring body is arranged between the lower end surface of the cover body 1 and the inner limiting portion 21 to further seal the gap between the cover body 1 and the pole column 2 and prevent liquid leakage.

[0037] In this embodiment, an explosion-proof valve is further arranged at the center of the cover body 1, an explosion-proof valve protection piece for protecting the explosion-proof valve is arranged on the outer surface of the cover body 1, and a liquid injection hole for injecting electrolyte into the battery or the battery cell is also arranged on the cover body 1.

[0038] Where not mentioned above, the prior art shall apply.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A top cover assembly, characterized in that: The invention comprises a cover body (1), a pole (2), and an upper plastic component (3); the cover body (1) is provided with a mounting hole (11) for mounting the pole (2); the pole (2) comprises an inner limiting portion (21) and an outer extending portion (22); an annular groove (23) is provided on the outer extending portion (22); the upper plastic component (3) is sleeved on the annular groove (23) to cooperate with the inner limiting portion (21) to limit the position, thereby fixing the pole (2) at the mounting hole (11); a first locking notch (24) is provided in the annular groove (23); and a first locking member (31) for extending into the first locking notch (24) is correspondingly provided on the upper plastic component (3).

2. A top cover assembly according to claim 1, characterized in that: A second locking groove (25) is also formed at the upper end surface of the protruding portion (22), a second locking member (32) is provided in the second locking groove (25), a first through hole (26) connected to the annular groove (23) is formed at the bottom of the second locking groove (25), a connecting member (33) is provided in the first through hole (26), the upper end of the connecting member (33) is fixedly connected to the second locking member (32), and the lower end is fixedly connected to the upper plastic component (3).

3. A top cover assembly as claimed in claim 2, characterized in that: A third locking groove (27) is also provided in the first through hole (26), and a third locking piece (34) for inserting into the third locking groove (27) is correspondingly provided integrally on the connecting piece (33).

4. A top cover assembly as claimed in claim 1, characterized in that: It also includes a locking bracket (35) disposed in the sleeve hole of the upper plastic component (3), and a composite slot structure (28) for fitting the locking bracket (35) is correspondingly provided on the outer protruding portion (22).

5. A top cover assembly as claimed in claim 4, characterized in that: It also includes a second through hole (29) that is connected to the interior of the composite slot structure (28) and extends to the upper end surface of the external protrusion (22).

6. A top cover assembly as claimed in claim 1, characterized in that: The bottom of the upper plastic component (3) is also provided with a plurality of snap-fitting protrusions (36) evenly arranged around the circumference, and the cover body (1) is provided with a plurality of snap-fitting grooves (12) evenly arranged around the mounting hole (11), and the snap-fitting protrusions (36) and the snap-fitting grooves (12) are adapted to each other.

7. A top cover assembly as claimed in claim 1, characterized in that: It also includes a sealing ring body arranged between the cover body (1) and the inner limiting portion (21).

8. A top cover assembly as claimed in claim 1, characterized in that: It also includes an explosion-proof valve arranged on the cover body (1), and an explosion-proof valve protection sheet arranged on the cover body (1).

9. A top cover assembly as claimed in claim 1, characterized in that: The cover body (1) is also provided with a liquid injection hole.

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