CN217903263U

CN217903263U - Integrated top cover assembly structure

Info

Publication number: CN217903263U
Application number: CN202221864879.0U
Authority: CN
Inventors: 孙海东
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-25
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to an integrated top cover assembly structure, which comprises a top cover plate and a lower plastic part, wherein a third-order boss with the diameter gradually increased from bottom to top is arranged on the lower plastic part, and a pole post hole for installing a positive pole post or a negative pole post is arranged in the middle of the third-order boss; the top cover plate penetrates through the third-order boss and is arranged on the first-stage step surface of the third-order boss, the height of the second-stage step surface of the third-order boss is larger than that of the top cover plate, and the bent parts on two sides of the copper bar at the top of the positive pole column or the negative pole column are arranged on the third-stage step surface of the third-order boss; the utility model discloses to go up mould and mould a design into an integral structure with moulding down, reduce the mould cost, and assemble more conveniently.

Description

Integrated top cover assembly structure

Technical Field

The utility model relates to a power battery especially relates to an integrated form top cap assembly structure.

Background

The conventional battery cell is sealed with the square shell through the top cover assembly body, and the sealing performance and the insulating performance of the top cover assembly body need to be considered. Therefore, the contact positions of the positive and negative poles must be kept insulated, and the current common method is to design an upper plastic part and a lower plastic part on a top cover assembly body, wherein the upper plastic part plays a role in fixing the poles and insulating, the lower plastic part serves as a body to provide mounting points for an explosion-proof sheet and the like, and in addition, the lower plastic part also prevents the core bag from short circuit.

The upper plastic part and the lower plastic part are divided into two parts and assembled at different stations, and although the parts have the functions of insulation and providing mounting points, the cost of the die is high, the number of the assembled parts is large, and the number of the assembling steps is large.

SUMMERY OF THE UTILITY MODEL

For solving the above problem, the utility model provides an integrated form top cap assembly structure will go up to mould a whole of piece and lower moulding, simple structure, simple to operate.

The utility model adopts the technical proposal that: an integrated form top cap assembly structure which characterized in that: the pole piece structure comprises a top cover plate and a lower plastic piece, wherein a third-order boss with the diameter gradually increasing from bottom to top is arranged on the lower plastic piece, and a pole hole for mounting an anode pole or a cathode pole is formed in the middle of the third-order boss; the top cover plate passes the third-order boss and sets up on the first order step face of third-order boss, the second level step face height of third-order boss is greater than the top cover plate height, and the copper bar both sides of anodal utmost point post or negative pole utmost point post top are bent the portion and are set up on the third level step face of third-order boss.

Preferably, a sealing ring is arranged between the top cover plate and the upper surface of the lower plastic part.

Preferably, the height of the second-stage step surface of the third-stage boss is 2.5-3.5 mm, and the thickness of the top cover plate is 1.5-2 mm.

Preferably, the overall height of the lower plastic part is 0.5-1 mm lower than that of the positive pole or the negative pole.

In the first step, the thickness of the sealing ring after compression is 1-3 mm, and the compression amount is 50%.

Preferably, the lower plastic part is provided with a liquid injection hole.

Preferably, the lower plastic part is provided with an explosion-proof piece through hole for installing an explosion-proof piece and a protection patch.

The utility model discloses the beneficial effect who gains is: the utility model discloses to mould on with mould down and mould a design into an integral structure, reduce the mould cost, and it is more convenient to assemble.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic structural view of a lower plastic part;

FIG. 3 is a schematic structural diagram of the top cover plate assembled on a third-order boss;

wherein: 1. a lower plastic part; 11. a third-order boss; 12. a through hole of the explosion-proof sheet; 13. a liquid injection hole; 2, a top cover sheet; 3. a negative electrode post; 4. a positive pole column; 5. a seal ring; 6. an explosion-proof sheet; 7. a protective patch; 8. copper bars are arranged.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the utility model discloses an integrated form top cap assembly structure, mould 1 including the top cap piece 2 with down, the utility model discloses mould a piece with moulding down on with traditional split type, design into a whole (the utility model provides a mould 1 is moulded down), reduce the mould cost, and it is more convenient to assemble. In the embodiment, the lower plastic part 1 is provided with three-step bosses 11 (one boss is arranged at each mounting position of the positive electrode pole and the negative electrode pole) with diameters gradually increasing from bottom to top, and the middle parts of the three-step bosses 11 are provided with pole column holes for mounting the positive electrode pole 4 or the negative electrode pole 3; the top cover plate 2 penetrates through the third-order boss 11 and is arranged on the first-stage step surface of the third-order boss 11, and the height of the first-stage step surface is used for controlling the compression amount of the sealing ring 5; the height of the second-stage step surface of the third-order boss 11 is greater than that of the top cover plate 2, so that the copper bar 8 is prevented from contacting with the top cover plate 2 to cause short circuit, the thickness of the top cover plate is 1.5-2 mm, and the height of the second-stage step surface is 2.5-3.5 mm; the height of the third-stage step surface of the third-stage boss depends on the height of the folded edge of the copper bar 8, and is generally the same as the height of the folded edge of the copper bar 8.

In the embodiment, a sealing ring 5 is arranged between the top cover plate 2 and the upper surface of the lower plastic part 1, the sealing ring 5 is made of EPDM (ethylene-propylene-diene monomer), the thickness of the compressed sealing ring is 1-3 mm, and the compression amount is 50%.

In this embodiment, the overall height of the lower plastic part 1 is 0.5-1 mm lower than that of the anode pole 4 or the cathode pole 3, so that the poles can protrude by more than 0.5mm after being assembled, and the poles are conveniently connected with the copper bar 8.

In this embodiment, the lower plastic part 1 is formed by injection molding of PP plus glass fiber or PC + ABS, and is provided with a liquid injection hole 13 and an explosion-proof sheet through hole 12 for installing the explosion-proof sheet 6 and the protection patch 7.

In this embodiment, the top cover sheet is made of aluminum and has a thickness of 1.5-2 mm.

During assembly, firstly assembling the pole, assembling the lower plastic part 1 after the pole is assembled, then assembling the sealing ring 5, and finally assembling the top cover plate 2; the rupture disc 6 and the protective patch 7 are assembled after the assembly of the top cover 2 is completed.

Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.

The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus, the specification and claims are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.

Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be in the singular but may also be in the plural.

It should be noted that although the terms "first," "second," "top," "bottom," "one side," "another side," "one end," "another end," and the like may be present and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another, where appropriate, without departing from the scope of the present description; the components at one end and the other end may be the same or different in performance from one another.

In describing positional relationships, for example, when positional sequences are described as being "on.. Above", "over.. Below", "below", and "next", unless such words or terms are used as "exactly" or "directly", they may include cases where there is no contact or contact therebetween. If a first element is referred to as being "on" a second element, that does not mean that the first element must be above the second element in the figures. The upper and lower portions of the member will change depending on the angle of view and the change in orientation. Thus, in the drawings or in actual construction, if a first element is referred to as being "on" a second element, it can be said that the first element is "under" the second element and the first element is "over" the second element. In describing temporal relationships, unless "exactly" or "directly" is used, the description of "after", "subsequently", and "before" may include instances where there is no discontinuity between steps. The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and may be implemented in a variety of different configurations as would be well understood by one of ordinary skill in the art. Embodiments of the present invention may be performed independently of each other, or may be performed together in an interdependent relationship.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.

Claims

1. An integrated form top cap assembly structure which characterized in that: the three-stage plastic part is provided with a three-stage boss with the diameter gradually increasing from bottom to top, and the middle part of the three-stage boss is provided with a pole post hole for mounting an anode pole post or a cathode pole post; the top cover plate passes the third-order boss and sets up on the first order step face of third-order boss, the second level step face height of third-order boss is greater than the top cover plate height, and the copper bar both sides of anodal utmost point post or negative pole utmost point post top are bent the portion and are set up on the third level step face of third-order boss.

2. The integrated header assembly structure of claim 1, wherein: and a sealing ring is arranged between the top cover plate and the upper surface of the lower plastic part.

3. An integrated header assembly structure as in claim 1, wherein: the height of the second-stage step surface of the third-order boss is 2.5-3.5 mm, and the thickness of the top cover plate is 1.5-2 mm.

4. The integrated header assembly structure of claim 1, wherein: the overall height of the lower plastic part is 0.5-1 mm lower than that of the anode pole or the cathode pole.

5. The integrated header assembly structure of claim 2, wherein: the thickness of the compressed sealing ring is 1-3 mm, and the compression amount is 50%.

6. An integrated header assembly structure as in claim 1, wherein: and the lower plastic part is provided with a liquid injection hole.

7. The integrated header assembly structure of claim 1, wherein: and the lower plastic part is provided with an explosion-proof piece through hole for installing an explosion-proof piece and a protective patch.