WO2021134895A1

WO2021134895A1 - Power battery cover plate and manufacturing method therefor

Info

Publication number: WO2021134895A1
Application number: PCT/CN2020/077607
Authority: WO
Inventors: 励建炬
Original assignee: 深圳市科达利实业股份有限公司
Priority date: 2019-12-31
Filing date: 2020-03-03
Publication date: 2021-07-08
Also published as: CN111081913A; DE212020000629U1; JP3240327U; CN111081913B; HU5509U

Abstract

Disclosed are a power battery cover plate and a manufacturing method therefor. The power battery cover plate comprises a top cover, a pole column and a first adhesive coating member. The top cover is provided with a counterbore, the counterbore is provided with a first step surface, and the top cover is provided with a flanging arranged around the counterbore. The pole column comprises a body and a convex ring connected to the body, wherein the body is matched in the counterbore, the convex ring is clamped between the first step surface of the counterbore and the flanging, and the surface of the body and the surface of the convex ring are coated with the first adhesive coating member.

Description

Power battery cover plate and manufacturing method thereof

This application claims the priority of the Chinese patent application whose application date is December 31, 2019 and the application number is 201911418867.8. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the technical field of power batteries, for example, to a power battery cover plate and a manufacturing method thereof.

Background technique

In related technologies, most of the structure of the power battery cover plate needs to be fixed by a laser welding process. During the welding manufacturing process, laser welding is prone to connection defects, leading to a risk of failure of the connection strength. In order to facilitate the welding, some additional structures need to be provided for laser welding, so the pole will occupy a larger internal space of the battery and the cost is relatively high.

Summary of the invention

This application proposes a power battery cover plate. The power battery cover plate has a relatively simple structure, is convenient to manufacture, has a safe structure and a high manufacturing yield.

This application proposes a method for manufacturing a power battery cover plate, which can reduce production and manufacturing costs.

An embodiment of the present application provides a power battery cover plate, including: a top cover, the top cover is provided with a counterbore, the counterbore has a first step surface, and the top cover is provided with a countersunk hole. Flanging set in the head hole; pole, the pole includes a body and a convex ring connected to the body, the body is fitted in the counterbore, and the convex ring is clamped on the first step Between the surface and the flanging; a first rubber-coated part, the first rubber-coated part covers the surface of the body and the convex ring.

The application also discloses a method for manufacturing a power battery cover plate, the method including:

Forming the first rubber covering member on the outer peripheral surface of the pole;

Placing the pole post in the counterbore, so that the lower end surface of the convex ring abuts against the first step surface through the first rubber covering member;

The flanging is bent so that the flanging is crimped on the convex ring.

Description of the drawings

Fig. 1 is a schematic structural diagram of a power battery cover provided by an embodiment of the present application.

Fig. 2 is a partial structural diagram of Fig. 1.

Fig. 3 is a schematic structural diagram of a power battery cover provided by an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a power battery cover provided by an embodiment of the present application.

FIG. 5 is a schematic structural diagram when the top cover of the power battery cover plate provided by an embodiment of the present application is not connected with the pole post.

FIG. 6 is a schematic diagram of the matching structure of the pole of the power battery cover plate and the first rubber covering member provided by an embodiment of the present application.

FIG. 7 is a flowchart of manufacturing steps of a power battery cover plate provided by an embodiment of the present application.

Reference signs:

1. Top cover; 11. Countersunk hole; 111. First step surface; 12. Flanging;

2. Polar post; 21, body; 211, second step surface; 22, convex ring;

3. The first package of plastic parts; 4. The second package of plastic parts.

Detailed ways

The technical solutions of the present application will be further described below in conjunction with the drawings and specific implementations.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the pointed device or The element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

In addition, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features, which are used to distinguish and describe the features, without ordering, and without priority. In the description of this application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

The structure of the power battery cover plate of this embodiment will be described below with reference to FIGS. 1 to 6.

As shown in Figures 1 to 6, this embodiment discloses a power battery cover plate, which includes a top cover 1, a pole 2 and a first rubber covering member 3. The top cover 1 is provided with a countersunk hole 11 and a countersunk head The hole 11 has a first step surface 111, the top cover 1 is provided with a flange 12 arranged around the counterbore 11, the pole 2 includes a body 21 and a convex ring 22 connected to the body 21, and the body 21 is fitted in the counterbore 11 Inside, the convex ring 22 is sandwiched between the first step surface 111 of the counterbore 11 and the flange 12, and the first rubber covering member 3 covers the surfaces of the body 21 and the convex ring 22.

As shown in FIG. 2, in this embodiment, the first step surface 111 is disposed facing the flange 12.

In this embodiment, the connection between the pole 2 and the top cover 1 is realized by crimping the convex ring 22 and the flange 12, and there is no need for welding connection between the pole 2 and the top cover 1. In the actual manufacturing process, only the pole 2 needs to be connected. Put it into the counterbore 11 of the top cover 1, and then bend the flange 12 to crimp the convex ring 22 between the first step surface 111 of the counterbore 11 and the flange 12, thereby completing the pole 2 and the flange 12 The connection between the top cover 1 and the surface of the pole 2 is provided with the first encapsulating member 3, the first encapsulating member 3 can fill the gap between the top cover 1 and the pole 2, thereby ensuring that the pole 2 and the top Stable connection between covers 1.

In the power battery cover plate of this embodiment, since the top cover 1 is provided with the flange 12 of the convex ring 22 structure capable of crimping the pole 2, the limit connection between the top cover 1 and the pole 2 is realized, which simplifies The overall structure of the power battery cover plate improves the internal space of the power battery and facilitates the assembly of the power battery cover plate.

In some embodiments, the convex ring 22 is connected to the lower end surface of the body 21, and the lower end surface of the first rubber covering member 3 abuts on the first step surface 111. Therefore, the lower end surface of the pole 2 is located above the lower end surface of the top cover 1, reducing the size of the pole 2 extending into the entire power battery, thereby ensuring the size of the internal space of the power battery. In other embodiments, according to actual needs, the structure of the pole 2 can also be formed as a structure in which the convex ring 22 surrounds the body 21. In this case, the body 21 of the pole 2 can be set through the counterbore 11, and the lower end surface of the first rubber covering member 3 abuts on the first step surface 111.

In some embodiments, as shown in FIG. 3, the power battery cover plate further includes a second rubber covering member 4, and the second rubber covering member 4 covers the surface of the flange 12. The additional second rubber covering member 4 can increase the stability of the pole 2 so as to prevent the pole 2 from falling out of the counterbore 11.

In the embodiment shown in FIG. 3, the second rubber covering member 4 is connected to the first rubber covering member 3.

In some optional embodiments, the first rubber covering member 3 and the second rubber covering member 4 are a plastic layer or a rubber layer. Exemplarily, the first encapsulation member 3 is a plastic layer or a rubber layer, which can cause the first encapsulation member 3 to deform when it is filled in the gap between the pole 2 and the top cover 1, so as to better ensure that the pole 2 and the top cover 1 are deformed. The connection stability of the top cover 1. The plastic layer or rubber layer of the first rubber-coated member 3 can facilitate the molding of the second rubber-coated member 4, thereby facilitating the production of the power battery cover plate.

Exemplarily, the first rubber-coated part 3 and the second rubber-coated part 4 are formed in any one of the coating processes such as injection molding, insulating sleeve installation, glue coating, painting, etc., and the first rubber-coated part 3 and The second encapsulating part 4 can be made of PP (polypropylene), PET (polyethylene terephthalate), PFA (soluble polytetrafluoroethylene), PPS (polyphenylene sulfide) and other coating materials. to make. In addition, the first rubber covering member 3 and the second rubber covering member 4 can be made of insulating materials or conductive materials according to actual needs.

In some embodiments, as shown in FIG. 6, a second step surface 211 is formed on the outer peripheral surface of the main body 21, and the first rubber covering member 3 covers the second step surface 211. As a result, the contact area between the main body 21 and the first rubber covering 3 can be increased, thereby preventing the first rubber covering 3 from falling off the main body 21.

In the embodiment shown in FIGS. 1 and 6, the second step surface 211 of the power battery cover plate has the same orientation as the first step surface 111.

The power battery cover plate of the exemplary embodiment of the present application will be described below with reference to FIGS. 1-2 and 5-6.

As shown in Figures 1-2 and 5-6, the power battery cover plate of this embodiment includes a top cover 1, a pole 2 and a first rubber covering member 3. The top cover 1 is provided with a counterbore 11 and a counterbore 11 has a first step surface 111, the top cover 1 is provided with a flange 12 arranged around the counterbore 11, the pole 2 includes a body 21 and a convex ring 22 connected to the body 21, and the convex ring 22 is connected to the bottom of the body 21 On the end surface, the lower end surface of the convex ring 22 abuts on the first step surface 111. The flange 12 is crimped on the convex ring 22 after being bent, and the first rubber covering member 3 covers the surface of the body 21 and the convex ring 22.

As shown in FIG. 3, for example, the power battery cover plate of this embodiment further includes a second rubber covering member 4 wrapped on the flange 12.

As shown in FIG. 4, for example, the pole 2 may be formed as a structure in which a convex ring 22 is arranged around the body 21, and the body 21 of the pole 2 is disposed through the counterbore 11, and the lower end surface of the convex ring 22 passes through the first The rubber covering member 3 abuts on the first step surface 111.

Hereinafter, the steps of the manufacturing method of the power battery cover plate of the embodiment of the present application will be described with reference to FIG. 7.

The application also discloses a method for manufacturing a power battery cover plate, including:

S1: forming a first rubber covering member 3 on the outer peripheral surface of the pole 2;

S2: Place the pole 2 in the countersunk hole 11 so that the convex ring 22 abuts on the first step surface 111;

S3: The flange 12 is bent so that the flange 12 is crimped on the convex ring 22.

When using the manufacturing method of this embodiment to produce the power battery cover plate, there is no need to use welding connection, but the form of bending and flanging 12 is used to realize the crimping of the flanging 12 to the convex ring 22, thereby adopting a mechanical limit structure The connection between the pole 2 and the top cover 1 is realized. This connection method is easy to operate and has a high manufacturing qualification rate.

The manufacturing method of this embodiment adopts the bending and flanging 12 to realize the connection between the pole 2 and the top cover 1. This mechanically limited connection method simplifies the structure of the power battery cover plate and improves the power battery cover plate Manufacturing efficiency and manufacturing pass rate.

In some embodiments, after bending and flanging 12, the method further includes:

S4: The second rubber covering member 4 is formed on the surface of the flange 12.

In some optional embodiments, the forming method of the first rubber covering member 3 and the second rubber covering member 4 is any one of coating methods among injection molding, installing an insulating sleeve, gluing or painting. As a result, the manufacturing methods of the first rubber-coated member 3 and the second rubber-coated member 4 are simplified, thereby simplifying the manufacturing process of the power battery cover plate.

An embodiment provides a method for manufacturing a power battery cover plate, including:

The first rubber-coated part 3 is formed on the outer peripheral surface of the pole 2 by any one of injection molding, installation of insulating sleeves, gluing or painting;

Place the pole 2 in the counterbore 11, so that the lower end surface of the convex ring 22 abuts on the first step surface 111 through the first rubber covering member 3;

Bend the flange 12 so that the flange 12 is crimped on the convex ring 22;

The second rubber covering member 4 is formed on the surface of the flange 12 by any one of injection molding, installing an insulating sleeve, gluing or painting.

In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one implementation of the present application Examples or examples. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

The present application provides a power battery cover plate. Because the top cover is provided with a structure capable of crimping the pole post convex ring, the limit connection between the top cover and the pole post is realized, and the overall structure of the power battery cover plate is simplified , Improve the internal space of the power battery, and facilitate the assembly of the power battery cover.

The present application provides a method for manufacturing a power battery cover plate. Since bending and flanging are used to realize the connection between the pole and the top cover, this mechanically limited connection method simplifies the manufacturing process of the power battery cover plate , Improve the manufacturing efficiency of the power battery cover plate, and increase the manufacturing pass rate of the power battery cover plate.

Claims

A power battery cover plate, including:

The top cover (1), the top cover (1) is provided with a counterbore (11), the counterbore (11) has a first step surface (111), and the top cover (1) is provided with A flange (12) arranged around the counterbore (11);

A pole (2), the pole (2) includes a body (21) and a convex ring (22) connected to the body (21), and the body (21) is fitted in the counterbore (11) Inside, the convex ring (22) is sandwiched between the first step surface (111) and the flange (12);

The first rubber-covered part (3), the first rubber-covered part (3) is wrapped on the surface of the body (21) and the convex ring (22).
The power battery cover plate according to claim 1, wherein the convex ring (22) is connected to the lower end surface of the body (21), and the lower end surface of the convex ring (22) passes through the first package The rubber piece (3) abuts on the first step surface (111).
The power battery cover plate according to claim 1, wherein the convex ring (22) is arranged around the body (21), the body (21) is arranged through the counterbore (11), and the The lower end surface of the convex ring (22) abuts on the first step surface (111) through the first rubber covering member (3).
The power battery cover plate according to claim 1, further comprising a second rubber covering member (4), the second rubber covering member (4) covering the surface of the flange (12).
The power battery cover plate according to claim 4, wherein the first rubber covering member (3) and the second rubber covering member (4) are a plastic layer or a rubber layer.
The power battery cover plate according to claim 1, wherein a second step surface (211) is formed on the outer peripheral surface of the main body (21), and the first rubber covering member (3) covers the second On the step surface (211).
A method for manufacturing a power battery cover plate according to any one of claims 1-6, the method comprising:

Forming the first rubber covering member (3) on the outer peripheral surface of the pole (2);

Place the pole (2) in the counterbore (11), so that the lower end surface of the convex ring (22) abuts against the first step through the first rubber covering (3) On the surface (111);

The flange (12) is bent so that the flange (12) is crimped on the convex ring (22).
The method of manufacturing a power battery cover plate according to claim 7, wherein the bending of the flange (12) so that the flange (12) is crimped on the convex ring (22) , The method includes:

A second rubber covering member (4) is formed on the surface of the flange (12).
The method for manufacturing a power battery cover plate according to claim 8, wherein the forming methods of the first rubber-coated part (3) and the second rubber-coated part (4) include injection molding, installation of an insulating sleeve, and gluing Or any coating method in painting.