CN219717048U

CN219717048U - Cover plate assembly and battery

Info

Publication number: CN219717048U
Application number: CN202321354805.7U
Authority: CN
Inventors: 刘丰; 王凯; 盛鹏飞; 刘祥哲
Original assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Current assignee: Jiangsu Yaoning New Energy Innovation Technology Co ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-09-19
Anticipated expiration: 2033-05-30

Abstract

The utility model provides a cover plate assembly and a battery, which belong to the technical field of batteries, and the cover plate assembly comprises: the device comprises an end cover, a first plastic part, a riveting part, a pole and a sealing ring. Wherein, the end cover is provided with a mounting hole; the first plastic part is provided with a first through hole and is arranged on one side of the end cover; the riveting piece is arranged on the other side of the end cover; the pole is arranged on one side of the first plastic part, which faces away from the end cover; the sealing ring is sleeved on the pole; the pole is sequentially penetrated into the first through hole and the mounting hole and is connected with the riveting piece; be equipped with the base on the utmost point post, the base with be provided with first setting element between the first plastic part and carry out spacing fixed. The cover plate component disclosed by the utility model has the advantages that the torsion resistance of the pole is improved, the reliability of the component structure is improved, and the safety of the battery cell in the use process is ensured.

Description

Cover plate assembly and battery

Technical Field

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

Background

With the development of new energy power battery technology, new energy pure electric vehicles have been rapidly developed. In the battery module of the actual installation of the current vehicle, the square battery cell is used as one of the main current battery cells for assembling the battery module, and has the advantages of simple assembly and high energy density. The top end cover of the square battery cell is assembled mostly by adopting a riveting structure process, for example, a riveting needle is utilized to punch the pole, so that the pole, the upper plastic, the end cover, the sealing ring and the lower plastic are assembled and sealed under the action of pressure, and the final connection of the riveting block and the pole is realized by a laser welding mode.

At present, in the top cover assembly process, the pole is pressed on the sealing ring by external pressure, and the sealing ring is driven to be limited to lean against the lower plastic step, so that the compression amount of the sealing ring can be controlled by adjusting the external pressure. However, because the insulating material commonly used in the plastic material has the problem of insufficient hardness, in the actual assembly process, external pressure riveting often appears to deform the plastic of the lower plastic part, thereby influencing the compression amount of the sealing ring, when the compression amount of the sealing ring in the assembled end cover is too large, the sizes of all components of the end cover are easily caused to be out of tolerance, the reliability of the sealing ring is reduced, when the compression amount of the sealing ring in the assembled end cover is insufficient, the top cover is easily caused to be in a state of poor sealing in the use process, liquid leakage occurs under severe conditions, and circuit corrosion is caused to cause short circuit, thereby causing safety problems.

Therefore, there is a need to design a cap assembly and a battery to control the compression amount of the rivet seal ring when the top cap is assembled, thereby solving the above-mentioned technical problems.

Disclosure of Invention

In view of the defects of the prior art, the utility model provides a cover plate assembly and a battery, wherein a first positioning piece is sleeved between a first plastic piece and a base of a pole to limit and fix, so that the compression amount of a sealing ring in a riveting process is controlled, and the technical problem that the sealing ring sleeved on the pole cannot be compressed to a safe compression amount due to insufficient hardness and easy deformation of the plastic piece in the riveting assembly process of the cover plate assembly in the prior art is solved.

To achieve the above and other related objects, the present utility model provides a cap assembly and a battery, the cap assembly comprising: the device comprises an end cover, a first plastic part, a riveting part, a pole and a sealing ring.

Wherein, the end cover is provided with a mounting hole; the first plastic part is provided with a first through hole and is arranged on one side of the end cover; the riveting piece is arranged on the other side of the end cover; the pole is arranged on one side of the first plastic part, which faces away from the end cover; the sealing ring is sleeved on the pole; the pole is sequentially penetrated into the first through hole and the mounting hole and is connected with the riveting piece; be equipped with the base on the utmost point post, the base with be provided with first setting element between the first plastic part and carry out spacing fixed.

In an example of the present utility model, the first plastic part is provided with a first fixing groove matched with the base, and the base is installed in the first fixing groove.

In an example of the present utility model, at least two first positioning members are sleeved between the first plastic member and the base.

In an example of the present utility model, a first positioning hole is formed in the first plastic part, a first positioning groove is formed in the base at a position corresponding to the first positioning hole, and two ends of the first positioning part are respectively abutted against and fixed in the first positioning hole and the first positioning groove.

In an example of the present utility model, a second plastic part is disposed on the other side of the end cover, a second through hole is disposed on the second plastic part, and the riveting part is mounted on the second plastic part; the pole column penetrates through the second through hole to be connected with the riveting piece.

In an example of the utility model, a second fixing groove matched with the second plastic part is formed on the other side of the end cover, and the second plastic part is installed in the second fixing groove; the second plastic part is provided with a third fixing groove matched with the riveting part, and the riveting part is installed in the third fixing groove.

In an example of the present utility model, a second positioning member is disposed between the second plastic member and the end cover for limiting and fixing.

In an example of the present utility model, at least two second positioning members are sleeved between the second plastic member and the end cover.

In an example of the present utility model, a second positioning hole is formed in the second plastic part, a second positioning groove is formed in the end cover at a position corresponding to the second positioning hole, and two ends of the second positioning part are respectively abutted against and fixed in the second positioning hole and the second positioning groove.

The utility model also provides a battery comprising the cover plate assembly according to any one of the above examples.

According to the cover plate assembly and the battery, the first locating piece is sleeved between the first plastic piece and the pole base, so that the relative positions of the first plastic piece and the pole base can be limited in the extrusion riveting process, the minimum clearance between the first plastic piece and the pole is limited to ensure that the compression amount of the sealing ring in the assembly process is maintained within a safe range, and the reduction of the structural reliability and the sealing performance of the cover plate assembly caused by excessive compression or insufficient compression amount of the assembled sealing ring is avoided. The arrangement structure of the cover plate assembly improves the torsion resistance of the pole, improves the reliability of the assembly structure, and ensures the safety of the battery cell in the use process. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a three-dimensional view of a cover plate assembly according to one embodiment of the present utility model;

FIG. 2 is an exploded view of a cover plate assembly according to one embodiment of the present utility model;

fig. 3 is a cross-sectional view of the cover plate assembly in the direction A-A of fig. 1 (i.e., in the cross-sectional direction in which the first positioning member is disposed) according to an embodiment of the present utility model.

Description of element reference numerals

100. An end cap; 110. a mounting hole; 120. a second fixing groove; 130. a second positioning groove; 200. a first plastic part; 210. a first through hole; 220. a first fixing groove; 230. a first positioning hole; 300. the second plastic piece; 310. a second through hole; 320. a third fixing groove; 330. a second positioning hole; 400. a pole; 410. a column; 420. a base; 421. a first positioning groove; 500. a rivet; 510. riveting holes; 600. a seal ring; 700. a first positioning member; 800. and a second positioning piece.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

Referring to fig. 1 and 2, the present utility model provides a cap plate assembly and a battery. The cover plate component is used for packaging the battery cell shell, and the cover plate component is sleeved with the first positioning piece between the plastic piece and the pole piece, so that the pole piece and the plastic piece can maintain the relative position when being riveted on the end cover, the compression amount of the sealing ring sleeved on the pole piece in the riveting press mounting process is maintained within a safe range, and the technical problem that the sealing ring which is inconsistent with the plastic piece is excessively compressed or insufficiently compressed due to the fact that the hardness of the plastic piece is not easy to deform in the riveting assembly process of the existing cover plate component is solved.

Referring to fig. 1 and 2, the present utility model provides a cover assembly detachably mounted on a top case of a battery case, the cover assembly being used for sealing the battery case of the battery and being electrically connected to a positive electrode tab and a negative electrode tab of an electric cell.

Referring to fig. 1 and 2, the cap plate assembly includes an end cap 100, a first plastic member 200, a rivet 500, a post 400, and a sealing ring 600. The end cap 100 is used to seal the battery case, and the post 400, the seal ring 600, the first plastic member 200, and the rivet 500 are assembled to the end cap 100. The end cover 100 is provided with a mounting hole 110, the first plastic part 200 is arranged on one side of the cover plate, the first plastic part 200 is provided with a first through hole 210 matched with the mounting hole 110, the first through hole 210 on the first plastic part 200 is opposite to the mounting hole 110 on the end cover 100, the riveting part 500 is arranged on the other side of the end cover 100, the riveting part 500 is provided with a riveting hole 510 matched with the pole 400, and the riveting hole 510 on the riveting part 500 is opposite to the mounting hole 110 on the end cover 100.

As shown in fig. 1 and 2, the pole 400 includes a column 410 and a base 420, and a seal ring 600 is sleeved on the pole 400. During assembly, the pole 400 is mounted on one side of the first plastic member 200 facing away from the end cover 100, the column 410 of the pole 400 sequentially passes through the first through hole 210 of the first plastic member 200 and the mounting hole 110 of the end cover 100 from one side of the end cover 100, and is riveted and fixed in the riveting hole 510 of the riveting member 500 on the other side of the end cover 100, and the base 420 of the pole 400 abuts and fixes the first plastic member 200 on one side of the end cover 100, so that the pole 400, the first plastic member 200 and the riveting member 500 are riveted and assembled to the end cover 100 together.

As shown in fig. 2 and 3, the base 420 of the pole 400 and the first plastic member 200 are disposed opposite to each other on a side facing away from the end cap 100, and the sealing ring 600 sleeved on the pole 400 is partially compressed and fixed between the first plastic member 200 and the base 420 of the pole 400, and the other part is circumferentially located between the post 410 of the pole 400 and the first through hole 210 of the first plastic member 200 and the mounting hole 110 of the end cap 100, so as to isolate the contact between the end cap 100 and the pole 400. The first plastic part 200 and the base 420 of the pole 400 are sleeved and connected with the first positioning part 700 at corresponding positions to limit the relative positions between the first plastic part 200 and the base 420, and two ends of the first positioning part 700 are fixedly connected with the base 420 and the first plastic part 200 respectively. Under the limiting action of the first positioning piece 700, the base 420 of the pole 400 and the first plastic piece 200 are not easy to twist and misplace during assembly extrusion, and meanwhile, a certain gap is reserved between the first plastic piece 200 and the base 420, so that the compression amount of the sealing ring 600 between the base 420 and the first plastic piece 200 is ensured to be maintained within a safe range.

Referring to fig. 2 and 3, in some embodiments, a plurality of first positioning members 700 are sleeved between the first plastic member 200 and the base 420 to limit the relative position between the first plastic member 200 and the base 420. At least two first positioning members 700 are sleeved between the first plastic member 200 and the base 420, and the at least two first positioning members 700 are symmetrically arranged between the first plastic member 200 and the base 420. For example, the first plastic member 200 and the base 420 are connected and fixed by two first positioning members 700, and the two first positioning members 700 are symmetrically located at two sides of the pole 400 between the first plastic member 200 and the base 420.

Referring to fig. 2 and 3, in some embodiments, two ends of the first positioning member 700 are respectively and fixedly connected to the first plastic member 200 and the base 420, so as to support and maintain the relative positions of the first plastic member 200 and the base 420. Specifically, the base 420 of the pole 400 is provided with a first positioning groove 421 on a surface facing the end cap 100, the first plastic member 200 is provided with a first positioning hole 230 at a corresponding position on a surface facing away from the end cap 100, one end of the first positioning member 700 is preassembled into the first positioning groove 421 of the base 420, and the other end of the first positioning member 700 is fixed in the first positioning hole 230 of the first plastic member 200 by being pressed. The aperture of the first positioning hole 230 gradually narrows as the first positioning member 700 goes deep, so that a buffer space is reserved for the fixed connection of the first positioning member 700 on the first plastic member 200 by using the adapted hole length, and stress damage of the first positioning member 700 under excessive pressure is avoided.

Referring to fig. 2 and 3, in some embodiments, the first plastic member 200 is provided with a first fixing groove 220 matching with the shape of the base 420 on a side facing away from the end cap 100, and the base 420 of the pole 400 may be embedded into the first fixing groove 220 on the first plastic member 200 when assembled.

Referring to fig. 1 and 2, in some embodiments, a second plastic member 300 is disposed on the other side of the end cap 100, and a second through hole 310 matched with the mounting hole 110 is disposed on the second plastic member 300. The second plastic member 300 is mounted on the other side of the end cap 100, the rivet 500 is mounted on the second plastic member 300, and the rivet hole 510 of the rivet 500 and the second through hole 310 of the second plastic member 300 are disposed opposite to the mounting hole 110 of the end cap 100. When the pole 400 is assembled, the column body 410 of the pole 400 sequentially passes through the first through hole 210 of the first plastic member 200, the mounting hole 110 of the end cover 100, and the second through hole 310 of the second plastic member 300, and is connected with the riveting hole 510 of the riveting member 500, so that the first plastic member 200 and the second plastic member 300 are assembled together to the end cover 100 through riveting between the pole 400 and the riveting member 500.

Referring to fig. 2 and 3, in some embodiments, a second fixing groove 120 is formed on the other side of the end cover 100, the shape of the second fixing groove 120 is matched with that of the second plastic part 300, and the second plastic part 300 can be embedded into the second fixing groove 120 of the end cover 100 when assembled; the second plastic member 300 is provided with a third fixing groove 320 on a surface facing away from the end cap 100, the shape of the third fixing groove 320 is matched with that of the riveting member 500, and the riveting member 500 can be embedded into the third fixing groove 320 of the second plastic member 300 when assembled.

Referring to fig. 2 and 3, in some embodiments, the second plastic 300 and the end cap 100 are sleeved with the second positioning member 800 to limit the relative positions between the second plastic 300 and the end cap 100, so as to prevent the second plastic 300 from being twisted and dislocated when the second plastic 300 presses the end cap 100, and further avoid the sealing ring 600 between the twisted pole 400 and the second plastic 300 and the end cap 100 from being extruded.

Referring to fig. 2 and 3, in the above embodiment, the second plastic part 300 and the end cover 100 are sleeved with a plurality of second positioning parts 800 to limit the relative positions between the second plastic part 300 and the end cover 100. At least two second positioning pieces 800 are sleeved between the second plastic piece 300 and the end cover 100, and the at least two second positioning pieces 800 are symmetrically arranged between the second plastic piece 300 and the end cover 100. For example, the second plastic 300 and the end cover 100 are connected and fixed by two second positioning members 800, and the two second positioning members 800 are symmetrically located at two sides of the pole 400 between the second plastic 300 and the end cover 100.

Referring to fig. 2 and 3, in the above embodiment, two ends of the second positioning member 800 are fixedly connected with the second plastic member 300 and the end cover 100, respectively, so as to support and maintain the relative positions of the second plastic member 300 and the end cover 100. Specifically, the end cover 100 is provided with a second positioning groove 130 on a surface facing the second plastic part 300, the second plastic part 300 is provided with a second positioning hole 330 at a corresponding position on the surface facing the end cover 100, one end of the second positioning part 800 is preassembled into the second positioning groove 130 of the end cover 100, and the other end of the second positioning part 800 is fixed in the second positioning hole 330 of the second plastic part 300 in a penetrating manner under extrusion. The aperture of the second positioning hole 330 gradually narrows with the penetration of the second positioning member 800, so that a buffer space is reserved for the fixed connection of the second positioning member 800 on the second plastic member 300 by using the relatively adaptive hole length, thereby avoiding the second positioning member 800 from being damaged by stress under excessive pressure.

In some embodiments, the utility model further provides a battery, which comprises a battery shell, an energy storage cell and electrolyte, wherein the energy storage cell is fixedly arranged in an inner cavity of the battery shell and filled with the electrolyte, the cover plate assembly according to any one of the embodiments is detachably arranged on the top shell of the battery shell, and a pole post on the cover plate assembly is electrically connected with a positive plate or a negative plate in the energy storage cell.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A cover plate assembly, comprising:

an end cover provided with a mounting hole;

the first plastic part is provided with a first through hole and is arranged on one side of the end cover;

the riveting piece is arranged on the other side of the end cover;

the pole is arranged on one side, away from the end cover, of the first plastic part;

the sealing ring is sleeved on the pole;

the pole column sequentially penetrates through the first through hole and the mounting hole and is connected with the riveting piece; be equipped with the base on the utmost point post, the base with be provided with first setting element between the first plastic part and carry out spacing fixed.

2. The cover plate assembly of claim 1, wherein the first plastic part is provided with a first fixing groove matched with the base, and the base is installed in the first fixing groove.

3. The cover plate assembly of claim 1, wherein at least two first positioning members are sleeved between the first plastic member and the base.

4. The cover plate assembly of claim 1, wherein a first positioning hole is formed in the first plastic member, a first positioning groove is formed in the base at a position corresponding to the first positioning hole, and two ends of the first positioning member are respectively abutted against and fixed in the first positioning hole and the first positioning groove.

5. The cover plate assembly according to claim 1, wherein a second plastic part is arranged on the other side of the end cover, a second through hole is formed in the second plastic part, and the riveting piece is mounted on the second plastic part; the pole column penetrates through the second through hole to be connected with the riveting piece.

6. The cover plate assembly according to claim 5, wherein a second fixing groove matched with the second plastic part is formed on the other side of the end cover, and the second plastic part is installed in the second fixing groove; the second plastic part is provided with a third fixing groove matched with the riveting part, and the riveting part is installed in the third fixing groove.

7. The cover plate assembly of claim 5, wherein a second positioning member is disposed between the second plastic member and the end cap for limiting fixation.

8. The cover plate assembly of claim 7, wherein at least two second positioning members are provided between the second plastic member and the end cap.

9. The cover plate assembly according to claim 7, wherein a second positioning hole is formed in the second plastic member, a second positioning groove is formed in the end cover at a position corresponding to the second positioning hole, and two ends of the second positioning member are respectively abutted and fixed in the second positioning hole and the second positioning groove.

10. A battery, characterized in that the top of the battery is provided with a cover plate assembly according to any one of claims 1 to 9.