CN219066992U

CN219066992U - Cylindrical battery combined cover plate

Info

Publication number: CN219066992U
Application number: CN202222557434.4U
Authority: CN
Inventors: 朱杰; 黄兴; 韩翰
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-05-23
Anticipated expiration: 2032-09-26

Abstract

The utility model relates to a cylindrical battery combined cover plate, which comprises a battery cover plate substrate, an insulating stop frame and a battery core connecting sheet, wherein the insulating stop frame is arranged between the battery cover plate substrate and the battery core connecting sheet, at least two positioning guide posts are arranged on the insulating stop frame, and positioning holes which are matched with the positioning guide posts in a one-to-one correspondence manner are formed in the battery cover plate substrate; the middle part of the insulating stop frame is provided with a through hole, the battery cover plate substrate is provided with a substrate boss, the substrate boss is provided with a bulge press header, the battery core connecting piece is provided with a connecting piece boss, the substrate boss penetrates through the through hole and is fixedly welded with the connecting piece boss, and then the bulge press header is used for pressing, so that the battery cover plate substrate, the insulating stop frame and the battery core connecting piece are tightly buckled together. The utility model has strong guiding positioning property, reduces unnecessary structures, improves the space utilization rate, reduces the cost of the combined cover plate, improves the liquid injection production efficiency and the liquid absorption capacity of the battery in the production process of the battery core, and can further improve the cycle performance of the battery.

Description

Cylindrical battery combined cover plate

Technical Field

The utility model relates to a power battery, in particular to a cylindrical battery combined cover plate.

Background

Along with the lithium battery under the background that the requirements of volume energy density and mass energy density are continuously increased, the shell is electrified, only one side pole is left to be the development trend of a large steel shell or a large aluminum shell in the future, the battery winding core adopts a full-pole lug rolling design, one end of the cylindrical battery is subjected to laser welding with the connecting sheet, the cylindrical battery is connected with the insulating gasket, the pole and the base plate through rivets, the insulating shell is used for leading out current from the pole, the other end of the cylindrical battery is subjected to laser welding with the connecting sheet, and the cylindrical battery is welded with the pole piece to enable the shell to be electrified.

The existing large-cylinder combined cover plate has more parts and complex structure, so that the weight of the cover plate is increased and the processing difficulty is increased; in addition, the filling degree of the large cylinder is higher and higher, the internal space is smaller and smaller, and the liquid discharging and liquid absorbing capacity of the battery electrolyte is affected, so that on one hand, the liquid injection efficiency is affected on the process, and on the other hand, the long-cycle service life can be affected by the deviation of the liquid absorbing capacity.

Disclosure of Invention

In order to solve the problems, the utility model provides the cylindrical battery combined cover plate, which not only simplifies the number of parts, reduces the cost of the cover plate, and lightens the weight of the cover plate; but also can increase the internal space and promote the liquid injection efficiency and the liquid absorbing capacity.

The technical scheme adopted by the utility model is as follows: the utility model provides a cylinder type battery combination apron, includes battery apron base plate, insulating stop frame and electric core connection piece, its characterized in that: the insulation stop frame is arranged between the battery cover plate base plate and the battery core connecting sheet, at least two positioning guide posts are arranged on the insulation stop frame, and positioning holes which are matched with the positioning guide posts in a one-to-one correspondence manner are formed in the battery cover plate base plate; the battery cover plate comprises a battery cover plate base plate, and is characterized in that a through hole is formed in the middle of the insulating stop frame, a base plate boss is arranged on the battery cover plate base plate, a protruding press header is arranged on the base plate boss, a connecting piece boss is arranged on the battery core connecting piece, the base plate boss penetrates through the through hole and is welded and fixed with the connecting piece boss, and then the protruding press header is used for upsetting, so that the battery cover plate base plate, the insulating stop frame and the battery core connecting piece are tightly buckled together.

Preferably, the insulation stop frame is provided with an error-proof positioning column, and the cell connecting sheet is provided with an error-proof notch matched with the error-proof positioning column. Through the matching of the error-proof positioning column and the error-proof notch, the front and back sides of the cell connecting sheet are not reversely arranged, and the fool-proof effect is achieved; and the battery cell connecting sheet can be ensured not to be inclined in installation, and the reliability is high.

Furthermore, the error-proofing notch is a regular triangle, and the error-proofing positioning column is a regular triangle positioning column.

Preferably, the insulating stop frame is provided with four positioning guide posts.

Preferably, the insulating stop frame is provided with a supporting boss. The support boss can guide the cell connecting sheet when in Z-shaped reverse folding, and can also support the cell connecting sheet when in reverse folding, so that the connecting sheet is prevented from being excessively folded.

Preferably, the through hole, the substrate boss and the connecting sheet boss are concentrically arranged.

Preferably, the cell connecting sheet is provided with a pre-bending notch.

Preferably, the cell connecting piece is provided with a connecting piece groove which is convenient for electrolyte to permeate.

The beneficial effects obtained by the utility model are as follows: the utility model has strong guiding positioning property, reduces unnecessary structures, improves the space utilization rate, reduces the cost of the combined cover plate, improves the liquid injection production efficiency and the liquid absorption capacity of the battery in the production process of the battery core, and can further improve the cycle performance of the battery.

Through setting up the support boss on insulating stop frame, set up the notch of buckling in advance in the position is bent to the electric core connection piece, when the electric core connection piece was bent, the support boss can be for the electric core connection piece guide when carrying out Z style of calligraphy inflection, can provide the support again when being bent for the electric core connection piece, prevents that the electric core connection piece from crossing the buckling. The problem of current connection piece combination assembly of apron and Z style of calligraphy are when turning back the guidance quality insufficient, and the connection piece is easy to appear and is buckled and unbend, and the battery connection piece has hidden danger of inside circuit breaking and short circuit for a long time, causes the incident is solved.

Drawings

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

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of an insulating stopper frame;

FIG. 4 is a schematic view of a battery cover substrate structure;

FIG. 5 is a schematic diagram of a cell connector;

wherein: 1-an insulating stop rack; 11-through holes; 12-error-proofing positioning columns; 13-supporting the boss; 14 (15, 16, 17) -positioning guide posts; 2-a battery cover plate substrate; 21-lower step of battery cover plate substrate; 22-substrate boss; 23 (24, 25, 26) -positioning holes; 3-a cell connecting sheet; 31 (32, 33, 34) -pre-bending slots; 35-connecting piece boss; 36-error proofing notch; 37-connecting piece groove.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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 utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-5, the cylindrical battery combined cover plate can be used as a positive electrode cover plate to be applied to an aluminum shell cylinder with a positively charged shell, and can also be used as a negative electrode cover plate to be applied to a steel shell cylinder with a negatively charged shell.

The utility model relates to a cylindrical battery combined cover plate, which comprises a battery cover plate base plate 2, an insulating stop frame 1 and a battery core connecting sheet 3, wherein the insulating stop frame 1 is arranged between the battery cover plate base plate 2 and the battery core connecting sheet 3, at least two positioning guide posts are arranged on the insulating stop frame 1, positioning holes which are matched with the positioning guide posts one by one are arranged on the battery cover plate base plate 2, and the assembly of the insulating stop frame 1 and the battery cover plate base plate 2 is realized through the corresponding matching of the positioning guide posts and the positioning holes; the middle part of the insulating stop frame 1 is provided with a through hole 11, the battery cover plate substrate 2 is provided with a substrate boss 22, the substrate boss 22 is provided with a convex press header, the cell connecting sheet 3 is provided with a connecting sheet boss 35, the substrate boss 22 passes through the through hole 11 and is welded and fixed with the connecting sheet boss 35, and then the convex press header is used for upsetting, so that the battery cover plate substrate 2, the insulating stop frame 1 and the cell connecting sheet 3 are tightly buckled together.

In this embodiment, the insulation stop frame 1 is provided with an error-proof positioning column 12, and the cell connecting sheet 3 is provided with an error-proof notch 36 matched with the error-proof positioning column. Through the matching of the error-proof positioning column 12 and the error-proof notch 36, the front and back sides of the cell connecting sheet 3 are not reversely arranged, and the error-proof function is achieved; and the battery cell connecting sheet 3 can be ensured not to be inclined in installation, and the reliability is high.

Further, the error-proofing notch 36 is designed as a regular triangle, and the error-proofing positioning column 12 is designed as a regular triangle positioning column.

In the present embodiment, the insulating stopper 1 is provided with four positioning posts (corresponding to 14, 15, 16, and 17 in fig. 2 respectively), and the corresponding battery cover substrate 2 is provided with four positioning holes (corresponding to 23, 24, 25, and 26 in fig. 4 respectively)

In this embodiment, the insulating stopper 1 is provided with a support boss 13. The supporting boss 13 can guide the cell connecting sheet 3 during Z-shaped reverse folding and can also provide support for the cell connecting sheet 3 during reverse folding so as to prevent the cell connecting sheet 3 from being excessively bent.

In this embodiment, the through hole 11, the substrate boss 22 and the connection pad boss 35 are concentrically arranged.

In this embodiment, the cell connecting piece 3 is provided with pre-bending notches (31, 32, 33, 34) to bend into a zigzag shape.

In the embodiment, the outer circle of the battery cover plate substrate 2 is provided with a battery cover plate substrate lower step 21, so that the battery cover plate substrate 2 and the shell are conveniently assembled in a closing way; the concave surface of the base plate boss 22 is convenient for being put into a sealing ball for sealing and welding a sealing nail during assembly, and the convex surface and the connecting sheet boss 35 are welded by laser.

When assembled: the battery cover plate substrate 2 is at the lowest, the insulating stop frame 1 is in the middle, the battery core connecting sheet 3 is at the uppermost, wherein the positioning holes (23, 24, 25, 26) of the battery cover plate substrate 2 are correspondingly and tightly matched with the positioning guide posts (14, 15, 16, 17) of the insulating stop frame 1, and the regular triangle error proofing notch 36 of the battery core connecting sheet 3 is tightly matched with the regular triangle positioning post 12 of the insulating stop frame 1; after assembly, the through hole 11, the substrate boss 22 and the connecting sheet boss 35 are kept concentrically, the connecting sheet boss 35 is in direct contact with the substrate boss 22, continuous laser is adopted for welding one circle at the contact position (so that one end of the battery cell, the battery cell connecting sheet, the battery cover plate substrate and the shell are kept in charge conduction connection), and the protruding press upsetting at the position of the substrate boss 22 is performed with upsetting, so that the battery cover plate substrate 2, the insulating stop frame 1 and the battery cell connecting sheet 3 are fastened together.

Here, it should be noted that the description of the above technical solution is exemplary, and the present specification may be embodied in different forms and should not be construed as being limited to the technical solution set forth herein. Rather, these descriptions will be 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 utility model is limited only by the scope of the claims.

The shapes, dimensions, ratios, angles, and numbers disclosed for describing aspects of the present specification and claims are merely examples, and thus, the present specification and claims are not limited to the details shown. In the following description, a detailed description of related known functions or configurations will be omitted when it may be determined that the emphasis of the present specification and claims is unnecessarily obscured.

Where the terms "comprising," "having," and "including" are used in this specification, there may be additional or alternative parts unless the use is made, the terms used may generally be in the singular but may also mean the plural.

It should be noted that although the terms "first," "second," "top," "bottom," "one side," "another side," "one end," "the other end," etc. may be used and used in this specification to describe various components, these components and portions should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with top and bottom elements, under certain circumstances, also being interchangeable or convertible with one another; the components at one end and the other end may be the same or different in performance from each other.

In describing positional relationships, for example, when positional sequences are described as "on," "above," "below," and "next," unless words or terms such as "just" or "directly" are used, it is also possible to include cases where there is no contact or contact between them. If a first element is referred to as being "on" a second element, it does not mean that the first element must be located above the second element in the figures. The upper and lower portions of the component will change in response to changes in the angle and orientation of the view. Thus, in the drawings or in actual construction, if it is referred to that a first element is "on" a second element, it can comprise the case that the first element is "under" the second element and the case that the first element is "over" the second element. In describing the time relationship, unless "just" or "direct" is used, a case where there is no discontinuity between steps may be included in describing "after", "subsequent" and "preceding". The features of the various embodiments of the utility model may be combined or spliced with one another, either in part or in whole, and may be implemented in a variety of different configurations as will be well understood by those skilled in the art. Embodiments of the present utility model 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 utility model. Obviously, the utility model is not limited to the above-described embodiments, but many variations are possible. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model should be considered to be within the scope of the present utility model.

Claims

1. The utility model provides a cylinder type battery combination apron, includes battery apron base plate (2), insulating stop frame (1) and electric core connection piece (3), its characterized in that: the insulation stop frame (1) is arranged between the battery cover plate base plate (2) and the battery core connecting sheet (3), at least two positioning guide posts (14) are arranged on the insulation stop frame (1), and positioning holes (23) which are matched with the positioning guide posts (14) in a one-to-one correspondence manner are formed in the battery cover plate base plate (2); the battery cover plate comprises a battery cover plate base plate (2), and is characterized in that a through hole (11) is formed in the middle of the insulating stop frame (1), a base plate boss (22) is arranged on the battery cover plate base plate (2), a protruding press header is arranged on the base plate boss (22), a connecting piece boss (35) is arranged on the battery core connecting piece (3), the base plate boss (22) penetrates through the through hole (11) and is fixedly welded with the connecting piece boss (35), and then the protruding press header is used for upsetting, so that the battery cover plate base plate (2), the insulating stop frame (1) and the battery core connecting piece (3) are fastened together.

2. The cylindrical battery pack cover according to claim 1, wherein: the insulation stop frame (1) is provided with an error-proof positioning column (12), and the cell connecting sheet (3) is provided with an error-proof notch (36) matched with the error-proof positioning column (12).

3. The cylindrical battery pack cover according to claim 2, wherein: the error-proofing notch (36) is a regular triangle, and the error-proofing positioning column (12) is a regular triangle positioning column.

4. The cylindrical battery pack cover according to claim 1, wherein: four positioning guide posts are arranged on the insulating stop frame (1).

5. The cylindrical battery pack cover according to claim 1, wherein: the insulating stop frame (1) is provided with a supporting boss (13).

6. The cylindrical battery pack cover according to claim 1, wherein: the through hole (11), the base plate boss (22) and the connecting sheet boss (35) are concentrically arranged.

7. The cylindrical battery pack cover according to claim 1, wherein: the cell connecting sheet (3) is provided with a pre-bending notch (31).

8. The cylindrical battery pack cover according to claim 1, wherein: and a connecting piece groove (37) which is convenient for electrolyte to permeate is arranged on the cell connecting piece (3).