CN215644691U

CN215644691U - Top cover assembly and power battery

Info

Publication number: CN215644691U
Application number: CN202121188140.8U
Authority: CN
Inventors: 励建炬; 范洪斌
Original assignee: Shenzhen Kedali Industry Co ltd
Current assignee: Shenzhen Kedali Industry Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-01-25
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a top cover assembly and a power battery, and relates to the technical field of power batteries. The top cover assembly comprises a top cover plate and a plastic part. The top cover plate is provided with a liquid injection hole. The plastic part is established on the diapire of top cap piece, and the roof of plastic part is equipped with and annotates the depressed part that the liquid hole corresponds the setting, prescribes a limit to between depressed part and the top cap piece and holds the chamber, offers on the depressed part and holds a plurality of through-holes of chamber intercommunication. The plastic part is provided with the concave part, the concave part is arranged corresponding to the liquid injection hole, and the concave part is provided with the through holes, so that the diaphragm and the adhesive tape can block part of the through holes on the concave part more easily under the action of negative pressure, and gas in the battery can be pumped out of the battery from other unblocked through holes and liquid injection holes, thereby reducing the difficulty in pumping air in the battery, improving the treatment efficiency of the vacuum environment in the battery, and further improving the processing efficiency of the battery.

Description

Top cover assembly and power battery

Technical Field

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

Background

Power battery goes to and needs to carry out the evacuation processing from annotating liquid hole department before filling electrolyte, and the structure on the electric core of the power battery of part type blocks up annotating the liquid hole easily in the evacuation processing procedure for the evacuation processing is difficult to normal clear, and has reduced power battery's machining efficiency.

Therefore, a top cover assembly and a power battery are needed to reduce the difficulty of air extraction from the inside of the battery, improve the processing efficiency of the vacuum environment inside the battery, and improve the processing efficiency of the battery.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a top cap assembly capable of reducing difficulty in exhausting air from the inside of a battery, improving efficiency of processing a vacuum environment inside the battery, and improving processing efficiency of the battery.

Another object of the present invention is to provide a power battery, which can reduce the difficulty of vacuum treatment inside the power battery and improve the processing efficiency of the power battery.

In order to achieve the technical effects, the technical scheme of the utility model is as follows:

a header assembly, comprising: the top cover plate is provided with a liquid injection hole; the plastic part, the plastic part is established on the diapire of top cap piece, the roof of plastic part be equipped with annotate the depressed part that the liquid hole corresponds the setting, the depressed part with inject between the top cap piece and hold the chamber, seted up on the depressed part with hold a plurality of through-holes of chamber intercommunication.

Further, the bottom wall of the top cover plate is provided with a protruding portion, the liquid injection hole penetrates through the protruding portion, and the protruding portion extends into the accommodating cavity.

Further, the junction of bulge and top flap is equipped with the annular groove.

Further, the through-hole includes: the through hole is arranged corresponding to the liquid injection hole; a plurality of communication holes distributed around the through-hole.

Further, the communication hole penetrates through the bottom wall of the recess and the plastic part in the vertical direction.

Further, the liquid injection hole is a stepped hole, and the inner diameter of the through hole is located between the inner diameter of the large end and the inner diameter of the small end of the liquid injection hole.

Further, the plurality of through holes penetrate the recessed portion in a radial direction of the recessed portion and communicate with the accommodation chamber.

Furthermore, a concave groove is formed in the concave part, the concave groove and the top cover plate define the accommodating cavity, and the cross section of the concave groove is gradually reduced in the direction away from the top cover plate.

Further, the liquid injection hole is a stepped hole, and a chamfer is arranged at the joint of the large end and the small end of the stepped hole.

A power cell, comprising: a housing; the cap assembly as described above, wherein the cap assembly is fastened to the housing.

The utility model has the following beneficial effects: the plastic part is provided with the concave part, the concave part is arranged corresponding to the liquid injection hole, and the concave part is provided with the through holes, so that the diaphragm and the adhesive tape can block part of the through holes on the concave part more easily under the action of negative pressure, and gas in the battery can be pumped out of the battery from other unblocked through holes and liquid injection holes, thereby reducing the difficulty in pumping air in the battery, improving the treatment efficiency of the vacuum environment in the battery, and further improving the processing efficiency of the battery.

The utility model has the following beneficial effects: according to the power battery provided by the utility model, due to the top cover assembly, the vacuum treatment difficulty in the power battery can be reduced, and the processing efficiency of the power battery is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic structural view of a cap assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of the cap assembly according to the present invention;

FIG. 3 is a schematic view of a partial internal structure of a cap assembly according to an embodiment of the present invention;

FIG. 4 is another schematic view of a portion of a cap assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a power battery according to an embodiment of the present invention.

Reference numerals

1. A top cover sheet; 11. a liquid injection hole; 111. chamfering; 12. a projection; 13. an annular groove;

2. a plastic part; 21. a recessed portion; 211. a through hole; 212. a through hole; 213. a communicating hole; 214. a recessed groove;

3. a housing.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Specific structures of the top cap assembly and the power battery according to the embodiment of the utility model are described below with reference to fig. 1 to 5.

As shown in fig. 1 to 4, fig. 1 discloses a top cover assembly including a top cover sheet 1 and a plastic member 2. The top cover plate 1 is provided with a liquid injection hole 11. Plastic part 2 is established on the diapire of top cap piece 1, and plastic part 2's roof is equipped with the depressed part 21 that corresponds the setting with annotating liquid hole 11, prescribes a limit to between depressed part 21 and the top cap piece 1 and holds the chamber, offers on the depressed part 21 with hold a plurality of through-holes 211 of chamber intercommunication.

It can be understood that, in the existing battery, the air inside the battery is usually drawn out from the liquid injection hole 11 to form a vacuum environment in the battery, the electric core used by a part of the battery is a core electric core, or the electric core is fixed in the battery through a structure such as an adhesive tape, and the liquid injection hole 11 is easily blocked by a diaphragm and the adhesive tape under the action of negative pressure in the vacuum-pumping process. The plastic part 2 of the embodiment of the utility model is provided with the concave part 21, the concave part 21 is arranged corresponding to the liquid injection hole 11, the concave part 21 is provided with a plurality of through holes 211, so that the diaphragm and the adhesive tape can easily block part of the through holes 211 on the concave part 21 under the action of negative pressure, and the gas in the battery can be pumped out of the battery from other unblocked through holes 211 and the liquid injection hole 11, thereby reducing the difficulty of air pumping out of the battery, improving the treatment efficiency of the vacuum environment in the battery and further improving the processing efficiency of the battery.

In some embodiments, as shown in FIG. 3, the bottom wall of the top cover sheet 1 is provided with a projection 12, the liquid injection hole 11 penetrates through the projection 12, and the projection 12 extends into the containing cavity.

It will be appreciated that the projection 12 ensures the thickness of the structure forming the pour hole 11, and thus the strength of the structure forming the pour hole 11, ensuring the reliability of use of the pour hole 11 in the top sheet 1.

In some embodiments, as shown in figure 3, the junction of the projection 12 and the top cover sheet 1 is provided with an annular groove 13.

It can be understood that the grooves can increase the overall area of the through holes 211, thereby facilitating the increase of the air circulation speed to improve the vacuum efficiency; in addition, the annular groove 13 also facilitates the matching of the concave portion 21 and the convex portion 12, and improves the assembly efficiency of the cap assembly.

In some embodiments, as shown in fig. 3, the through-hole 211 includes a through-hole 212 and a plurality of communication holes 213. The through hole 212 is provided corresponding to the pour hole 11. A plurality of communication holes 213 are distributed around the through-hole 212.

It can be understood that the through hole 212 is disposed corresponding to the liquid injection hole 11, which is beneficial to improving the possibility that the through hole 212 is blocked by the membrane or the adhesive tape during the vacuum-pumping process, so as to effectively reduce the possibility that the communication hole 213 is blocked by the membrane or the adhesive tape, i.e. it can be better ensured that a part of the communication holes 213 can still be communicated after the membrane or the adhesive tape is blocked, so as to ensure the normal operation of the vacuum-pumping process, thereby further improving the efficiency and reliability of the vacuum-pumping.

In some embodiments, as shown in fig. 3, the communication hole 213 penetrates the bottom wall of the recess 21 and the plastic member 2 in a vertical direction.

It can be understood that, through the above-mentioned structural arrangement, the opening area of the communication hole 213 can be increased to the maximum extent, and meanwhile, since the communication hole 213 penetrates through the recess 21 and the plastic part 2 in the vertical direction, the processing difficulty of the communication hole 213 can be reduced, and the processing efficiency of the plastic part 2 can be improved.

In some embodiments, as shown in FIG. 3, the pour spout 11 is a stepped spout, and the inner diameter of the through-hole 212 is located between the inner diameter of the large end and the inner diameter of the small end of the pour spout 11.

It can be understood that, through the above-mentioned structural arrangement, it can be convenient for guarantee that after vacuum treatment is finished, the through hole 212 will not cause an influence on the normal liquid injection function of the liquid injection hole 11, and the negative influence of the concave part 21 and the through hole 211 on the use of the top cover component is reduced, so that the normal use of the top cover component is better guaranteed.

In some embodiments, as shown in fig. 4, a plurality of through holes 211 penetrate the recess 21 in a radial direction of the recess 21 and communicate with the accommodation chamber.

It can be understood that the structure is provided with the processing that does benefit to depressed part 21 and through-hole 211, under the prerequisite of guaranteeing the normal clear of evacuation, can also further reduce the processing degree of difficulty of top cap subassembly, improves its machining efficiency.

In some embodiments, the recessed portion 21 is provided with a recessed groove 214, the recessed groove 214 and the top cover sheet 1 define a containing cavity, and the cross section of the recessed groove 214 is gradually reduced in a direction away from the top cover sheet 1.

It will be appreciated that the recess 214 facilitates the formation of a receiving cavity between the top cover sheet 1 and the plastic part 2, and also ensures a sealing connection between the top cover sheet 1 and the recess 21. In addition, the cross section of the concave groove 214 is gradually reduced, so that the processing difficulty of forming the concave part 21 on the plastic part 2 can be reduced, the processing cost of the top cover assembly is reduced, and the processing efficiency of the top cover assembly is improved.

In some embodiments, the liquid filling hole 11 is a stepped hole, and a chamfer 111 is arranged at the joint of the large end and the small end of the stepped hole.

It can be understood that current notes liquid hole 11 generally can be sealed through sealed nail, sets up chamfer 111 back in the junction of the main aspects of step hole and tip, and chamfer 111 can avoid annotating 11 burrs on the limit in liquid hole or criticize the sealed nail of cutting edge of a knife or a sword wearing and tearing, has prolonged the life of sealed nail greatly, effectively promotes sealed effect simultaneously, prevents that electrolyte from spilling over, guarantees battery product quality.

As shown in fig. 5, the utility model also discloses a power battery, which comprises a housing 3 and the above-mentioned top cover assembly. The top cover component is buckled on the shell 3.

According to the power battery provided by the embodiment of the utility model, due to the top cover assembly, the vacuum treatment difficulty in the power battery can be reduced, and the processing efficiency of the power battery is improved.

Example (b):

a cap assembly according to one embodiment of the present invention is described below with reference to fig. 1-3.

The top cover assembly of the present embodiment includes a top cover plate 1 and a plastic member 2.

The top cover plate 1 is provided with a liquid injection hole 11. The bottom wall of the top cover plate 1 is provided with a protruding part 12, the liquid injection hole 11 penetrates through the protruding part 12, and the protruding part 12 extends into the accommodating cavity. The junction of the projection 12 and the top cover plate 1 is provided with an annular groove 13.

Plastic part 2 is established on the diapire of top cap piece 1, and plastic part 2's roof is equipped with the depressed part 21 that corresponds the setting with annotating liquid hole 11, prescribes a limit to between depressed part 21 and the top cap piece 1 and holds the chamber, offers on the depressed part 21 with hold a plurality of through-holes 211 of chamber intercommunication. The through hole 211 includes a penetrating hole 212 and a plurality of communicating holes 213. The through hole 212 is provided corresponding to the pour hole 11. A plurality of communication holes 213 are distributed around the through-hole 212. The communication hole 213 penetrates the bottom wall of the recess 21 and the plastic member 2 in the vertical direction. The pour hole 11 is a stepped hole, and the inner diameter of the through hole 212 is located between the inner diameter of the large end and the inner diameter of the small end of the pour hole 11. The concave part 21 is provided with a concave groove 214, the concave groove 214 and the top cover sheet 1 define an accommodating cavity, and the cross section of the concave groove 214 is gradually reduced in the direction away from the top cover sheet 1. The liquid injection hole 11 is a stepped hole, and a chamfer 111 is arranged at the joint of the large end and the small end of the stepped hole.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A header assembly, comprising:

the top cover plate (1), the top cover plate (1) is provided with a liquid injection hole (11);

plastic part (2), establish plastic part (2) on the diapire of top cap piece (1), the roof of plastic part (2) be equipped with annotate liquid hole (11) and correspond depressed part (21) that set up, depressed part (21) with inject between top cap piece (1) and hold the chamber, seted up on depressed part (21) with hold a plurality of through-holes (211) of chamber intercommunication.

2. The top cover assembly according to claim 1, wherein the bottom wall of the top cover sheet (1) is provided with a projection (12), the liquid injection hole (11) penetrates through the projection (12), and the projection (12) extends into the accommodating cavity.

3. The lid assembly according to claim 2, characterized in that the connection of the protrusion (12) and the top sheet (1) is provided with an annular groove (13).

4. The header assembly of claim 1, wherein the through-hole (211) comprises:

a through hole (212), wherein the through hole (212) is arranged corresponding to the liquid injection hole (11);

a plurality of communication holes (213), the plurality of communication holes (213) being distributed around the through-hole (212).

5. Cap assembly according to claim 4, wherein said communication hole (213) penetrates the bottom wall of said recess (21) and said plastic part (2) in a vertical direction.

6. The lid assembly according to claim 4, wherein the pour spout (11) is a stepped spout, and the inner diameter of the through-hole (212) is located between the inner diameter of the large end and the inner diameter of the small end of the pour spout (11).

7. The cap assembly according to claim 1, wherein a plurality of the through holes (211) penetrate the recess (21) in a radial direction of the recess (21) and communicate with the receiving cavity.

8. The top cover assembly according to claim 1, characterized in that the recess (21) is provided with a recess groove (214), the recess groove (214) and the top cover sheet (1) define the accommodating cavity, and the cross section of the recess groove (214) is gradually reduced in the direction away from the top cover sheet (1).

9. The top cap assembly according to claim 1, wherein the liquid injection hole (11) is a stepped hole, and a chamfer (111) is arranged at the joint of the large end and the small end of the stepped hole.

10. A power cell, comprising:

a housing (3);

the cap assembly of any one of claims 1-9, which is snapped onto the housing (3).