CN220106804U - Top cover assembly of power battery and power battery - Google Patents

Abstract

The utility model discloses a top cover assembly of a power battery, which comprises a top cover plate, a pole assembly and lower plastic; the top cover plate is provided with a matching hole for installing the pole assembly; and an exhaust structure communicated with the matching hole to realize an exhaust function is arranged on the pole assembly. According to the utility model, the exhaust structure for exhausting is arranged on the pole assembly, when the sealing ring is neglected to be installed on the top cover structure, even if the situation that the gap between the pole and the top cover is blocked due to the forced deformation of the upper plastic of the top cover occurs, the top cover structure still cannot smoothly pass through the air tightness detection, so that the detection accuracy of the sealing ring of the top cover structure can be improved, and the sealing ring is effectively prevented from being neglected to be installed.

Description

Top cover assembly of power battery and power battery

Technical Field

The utility model relates to the technical field of power batteries, in particular to a power battery top cover assembly and a power battery.

Background

In modern society, more and more electric tools and new energy vehicles are driven by power sources, and batteries are widely used in the electric tools and the new energy vehicles due to their excellent characteristics such as high capacity and high safety. These batteries should have good safety in addition to high capacity to meet the standards of use and to meet the needs of people.

For the aluminum shell battery in the power battery, the battery is generally composed of an aluminum shell, a top cover and a battery core, the battery core is accommodated in the aluminum shell, the top cover is welded on the aluminum shell, the lugs of the battery core are connected with the poles on the top cover in a guiding mode, and in order to prevent liquid leakage, sealing rings are sleeved on the poles, so that a closed space is formed in the aluminum shell battery, and the air tightness is improved.

However, the top cover has the following problems in practical production, because the size of the sealing ring is smaller, the sealing ring is easy to leak in assembly, and although the top cover can be subjected to air tightness test before being welded with the aluminum shell, the pole is fixed on the top cover by adopting a riveting process, and the gap between the pole and the top cover can be blocked due to the fact that the upper plastic of the top cover is deformed under stress due to overlarge riveting force, so that a 'pseudo sealing structure' is formed, and the air tightness test can be successfully passed, however, the pseudo sealing structure can be loosened along with the time, finally, the problem of liquid leakage of the aluminum shell battery is caused, and therefore, how to improve the detection accuracy of the sealing ring of the top cover is a problem which needs to be solved by a person in the field.

Disclosure of Invention

The utility model aims to solve the problems that: the utility model provides a power battery top cap subassembly and power battery is provided with the exhaust structure that is used for the exhaust through being provided with on the utmost point post subassembly, when the top cap structure neglected loading sealing washer, even take place the last plastic atress deformation of top cap and shutoff the condition in the gap between utmost point post and the top cap, the top cap structure still can't pass through the gas tightness smoothly and detect to can improve the detection accuracy of the sealing washer of top cap structure, effectively prevent neglected loading sealing washer.

The technical scheme provided by the utility model for solving the problems is as follows: a power battery top cover assembly comprises a top cover plate, a pole assembly and lower plastic; the top cover plate is provided with a matching hole for installing the pole assembly; and an exhaust structure communicated with the matching hole to realize an exhaust function is arranged on the pole assembly.

Preferably, the pole assembly comprises an upper plastic, a riveting block and a pole, wherein the upper plastic is provided with a mounting groove, the riveting block is buckled in the mounting groove, and the upper plastic is provided with a mounting hole matched with the pole.

Preferably, a plurality of axial exhaust grooves I are uniformly distributed on the wall of the mounting hole, and an exhaust groove II communicated with the exhaust groove I is arranged in the mounting groove.

Preferably, an exhaust groove III communicated with the exhaust groove I is arranged on the lower end face of the riveting block.

Preferably, the third exhaust groove is located right above the second exhaust groove.

Preferably, the lower end face of the upper plastic is provided with a vent groove IV communicated with the mounting hole.

Preferably, the top cover plate is provided with a matching hole for installing the pole assembly, and the top cover plate is also provided with an exhaust groove five communicated with the matching hole.

Preferably, the fifth vent groove and the fourth vent groove are perpendicular to each other.

The utility model also discloses a power battery, which comprises the power battery top cover assembly.

Compared with the prior art, the utility model has the advantages that: according to the utility model, the exhaust structure for exhausting is arranged on the pole assembly, when the sealing ring is neglected to be installed on the top cover structure, even if the situation that the gap between the pole and the top cover is blocked due to the forced deformation of the upper plastic of the top cover occurs, the top cover structure still cannot smoothly pass through the air tightness detection, so that the detection accuracy of the sealing ring of the top cover structure can be improved, and the sealing ring is effectively prevented from being neglected to be installed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

FIG. 1 is a schematic diagram of an explosive structure of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a section A-A of FIG. 2;

FIG. 4 is an enlarged schematic view at A in FIG. 3;

FIG. 5 is a schematic perspective view of the upper plastic;

FIG. 6 is a schematic perspective view of the upper plastic;

fig. 7 is a schematic perspective view of the rivet block.

The drawings are marked: 1. the riveting piece, 2, the pole, 3, upper plastic, 4, the sealing ring, 5, the top cover piece, 6, the fifth exhaust groove, 7, the mating hole, 8, the fourth exhaust groove, 9, the mounting hole, 10, the first exhaust groove, 11, the second exhaust groove, 12, the mounting groove, 13 and the third exhaust groove.

Detailed Description

The following detailed description of embodiments of the present utility model will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present utility model can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.

In the description of the present utility model, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" or "a second" feature may explicitly or implicitly include one or more such feature, and in the description of the utility model, the meaning of "a number" is two or more, unless otherwise specifically defined.

In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the utility model. As used in the specification of the embodiments of the utility model and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Example 1

The embodiment discloses a power battery top cover assembly, which is shown in fig. 1-7, and comprises a top cover plate 5, a pole assembly and lower plastic; the top cover sheet 5 is provided with a matching hole 7 for installing a pole assembly; and an exhaust structure communicated with the matching hole to realize an exhaust function is arranged on the pole assembly.

In the scheme, through being provided with the exhaust structure that is used for the exhaust on the utmost point post subassembly, when the top cap structure leaks the dress sealing washer, even take place the last plastic atress deformation of top cap and shutoff the condition in the gap between utmost point post and the top cap, the top cap structure still can't pass through the gas tightness smoothly and detect to can improve the detection accuracy of the sealing washer of top cap structure, effectively prevent to leak the dress sealing washer.

Specifically, as shown in fig. 1, the pole assembly comprises an upper plastic 3, a riveting block 1 and a pole 2, wherein an installation groove 12 is formed in the upper plastic 3, the riveting block 1 is buckled in the installation groove 12, and an installation hole 9 matched with the pole 2 is formed in the upper plastic 3.

In this embodiment, as shown in fig. 6, a plurality of axial exhaust grooves 10 are uniformly distributed on the wall of the mounting hole 9, and an exhaust groove two 11 communicating with the exhaust groove one 10 is disposed in the mounting groove 12.

The first exhaust grooves are uniformly distributed on the mounting holes at intervals to form a plum blossom shape, and when the upper plastic is stressed to deform to block the gap between the pole and the top cover, gas can enter the second exhaust grooves from the first exhaust grooves to complete exhaust.

As shown in fig. 7, in order to further improve the stability of the exhaust gas, an exhaust groove three 13 communicating with the exhaust groove one 10 is provided on the lower end surface of the rivet block 1. Further, the third exhaust groove 13 is located right above the second exhaust groove 11.

Because go up the plastic and warp when the atress, exhaust groove two is probably because warp and plug up, through be provided with on the lower terminal surface of riveting piece 1 with exhaust groove three 13 of exhaust groove one 10 intercommunication, when exhaust groove two is because warp the plug up, still can realize the exhaust function through exhaust groove three to can effectually promote the exhaust stability.

Wherein, the lower end face of the upper plastic 3 is provided with a vent groove IV 8 communicated with the mounting hole 9.

Further, as shown in fig. 1 and 6, the top cover sheet 5 is further provided with a fifth air exhaust groove 6 communicated with the matching hole 7; and the fifth exhaust groove 6 and the fourth exhaust groove 8 are mutually perpendicular.

In the scheme, through setting up exhaust groove one, exhaust groove two, exhaust groove three, exhaust groove four and exhaust groove five, can be abundant guarantee have one or a plurality of exhaust grooves can carry out the exhaust, can effectually promote exhaust stability.

Example 2

The present embodiment discloses a power cell comprising a power cell top cover assembly as described in any one of embodiment 1. It should be noted that, in this embodiment, all the other structures of the power battery adopt structures in the prior art, and those skilled in the art may select and use the design according to actual situations, which will not be described herein.

The foregoing is illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the claims. The present utility model is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (9)

1. A power battery top cover assembly comprises a top cover plate (5), a pole assembly and lower plastic; the method is characterized in that: the top cover sheet (5) is provided with a matching hole (7) for installing the pole assembly; and an exhaust structure communicated with the matching hole to realize an exhaust function is arranged on the pole assembly.

2. The power cell top cap assembly of claim 1, wherein: the pole assembly comprises an upper plastic (3), a riveting block (1) and a pole (2), wherein an installation groove (12) is formed in the upper plastic (3), the riveting block (1) is buckled in the installation groove (12), and an installation hole (9) matched with the pole (2) is formed in the upper plastic (3).

3. The power cell top cap assembly of claim 2, wherein: a plurality of axial exhaust grooves I (10) are uniformly distributed on the hole wall of the mounting hole (9), and an exhaust groove II (11) communicated with the exhaust grooves I (10) is arranged in the mounting groove (12).

4. A power cell top cap assembly according to claim 3, wherein: an exhaust groove III (13) communicated with the exhaust groove I (10) is arranged on the lower end face of the riveting block (1).

5. The power cell top cap assembly of claim 4, wherein: and the third exhaust groove (13) is positioned right above the second exhaust groove (11).

6. The power cell top cap assembly of claim 2, wherein: and an exhaust groove IV (8) communicated with the mounting hole (9) is formed in the lower end face of the upper plastic (3).

7. The power cell top cap assembly of claim 6, wherein: and the top cover sheet (5) is also provided with an exhaust groove five (6) communicated with the matching hole (7).

8. The power cell top cap assembly of claim 7, wherein: and the fifth exhaust groove (6) and the fourth exhaust groove (8) are mutually perpendicular.

9. A power cell, characterized in that: a power cell cap assembly comprising any one of claims 1-8.