CN210668530U

CN210668530U - Lithium ion battery annotates liquid hole packaging structure

Info

Publication number: CN210668530U
Application number: CN201921096050.9U
Authority: CN
Inventors: 周培荣; 许玉林; 王爱淑; 李佳旭; 印杏莲
Original assignee: Suzhou Ankao Energy Co Ltd
Current assignee: Suzhou Ankao Energy Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-02
Anticipated expiration: 2029-07-12

Abstract

The application discloses lithium ion battery annotates liquid hole packaging structure includes: the battery case comprises a battery case with an opening part, an inner core contained in the battery case, and a battery cap which is sealed and fixed at the opening part of the battery case and is provided with a liquid injection hole; and a blind rivet for sealing and plugging the liquid injection hole is fixed in the liquid injection hole through a rivet. This kind of lithium ion battery annotates liquid hole packaging structure easy to carry out of this application, and assembly efficiency is high, and the structure is firm moreover, and the leakproofness is high.

Description

Lithium ion battery annotates liquid hole packaging structure

Technical Field

The application relates to a lithium ion battery and a liquid injection hole packaging structure thereof.

Background

So far, the packaging of the liquid injection hole of the square or cylindrical lithium ion battery adopts a process method of wedging a stainless steel ball, and although the process is feasible, unreliable operation sometimes occurs.

Disclosure of Invention

The purpose of the application is: in order to solve the problems, the lithium ion battery and the liquid injection hole packaging structure thereof are stable in structure, convenient to implement and high in processing efficiency.

The technical scheme of the application is as follows:

a lithium ion battery annotates liquid hole packaging structure includes:

a battery case having an opening part,

an inner core accommodated in the battery case,

a battery cap which is fixed on the opening part of the battery case in a sealing way and is provided with a liquid injection hole;

and a blind rivet for sealing and plugging the liquid injection hole is fixed in the liquid injection hole through a rivet.

On the basis of the technical scheme, the application also comprises the following preferable scheme:

and the current collecting disc is fixedly welded on the inner core, and the current collecting disc and the battery cap are riveted and fixed by the blind rivet.

And the flow collecting disc is provided with a through rivet hole in a run-through manner, and the self-plugging rivet penetrates into the through rivet hole.

The through riveting hole is a flanging hole, and the flanging of the flanging hole is inserted into the liquid injection hole in an abutting mode.

The battery case is of a cylindrical structure with two open ends, the battery cap is arranged at the opening part at one end of the battery case, and the opening part at the other end of the battery case is used for sealing and fixing the second battery cap.

The battery shell is a cylindrical structure with an opening at one end and a closed bottom at the other end, and the battery cap is arranged at the opening end of the battery shell.

The current collecting disc is arranged in an abutting mode with the positive end face of the inner core and is fixed in a welding mode.

The current collecting disc is attached to the negative end face of the inner core and welded and fixed.

And the battery cap is welded and fixed with the battery shell.

And the self-plugging rivet is welded and fixed with the battery cover cap.

The application has the advantages that:

this application seals with the help of the blind rivet fixed of riveting and annotates the liquid hole, during the implementation, only need with blind rivet insert annotate the liquid hole borrow help draw the riveter to rivet can again, draw the completion back of riveting, blind rivet and annotate the liquid hole cohesion strong, the leakproofness is high and difficult not hard up break away from. And the hole sealing mode is easy to operate and high in efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a lithium ion battery injection hole packaging structure in an embodiment of the present application;

wherein: the battery comprises a battery case 1, a battery core 2, a battery cap 3, a blind rivet 4, a current collecting plate 5, a liquid injection hole 3a and a rivet penetrating hole 5 a.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Fig. 1 shows a preferred embodiment of the lithium ion battery electrolyte injection hole packaging structure of the present application, which includes a cylindrical battery case 1, and both axial ends of the battery case 1 are open structures. An inner core 2 which is formed by winding positive and negative pole pieces and a diaphragm and is approximately cylindrical is arranged in the battery shell 1. The axial two ends of the inner core 2 are both processed by rubbing and flattening to form an anode end face and a cathode end face, and the anode end face and the cathode end face are respectively attached and welded with an anode current collecting disc and a cathode current collecting disc. An anode cap and a cathode cap are respectively fixed at openings at two axial ends of the battery case 1, wherein the anode cap is in conductive connection with the anode current collecting plate, and the cathode cap is in conductive connection with the cathode current collecting plate. And the positive electrode cap is welded and fixed with the battery shell 1, while the negative electrode cap is mechanically extruded and fixed with the battery shell, and an insulating sealing ring is clamped between the positive electrode cap and the battery shell. The positive electrode cap is provided with a liquid injection hole 3a for injecting an electrolyte into the battery. Since the main improvement of this embodiment is in the positive terminal of the cell, only the positive cap and the positive current collecting plate are shown in fig. 1, and the negative cap and the negative current collecting plate are omitted. Meanwhile, for convenience of description of the structure of the present embodiment, hereinafter, unless otherwise specified, all the cell caps 3 are referred to as positive electrode caps, and all the collector plates 5 are referred to as positive electrode collector plates.

The key improvement of the embodiment is that the liquid injection hole 3a is fixedly provided with a blind rivet 4 for sealing and plugging the liquid injection hole 3a by pulling rivet. That is, in the present embodiment, the blind rivet 4 fixed by pulling rivet is used to seal and block the injection hole 3a after the injection is completed, instead of using the conventional steel ball to seal and block the injection hole.

In order to further improve the sealing performance of the blind rivet 4 with respect to the liquid inlet 3a, the blind rivet 4 and the battery cap 3 are welded circumferentially one turn outside the battery cap 3 in this embodiment in order to allow the electrolyte inside the battery to seep out through a small gap between the rivet and the liquid inlet.

The self-plugging rivet 4 is used for riveting and fixing the current collecting disc 5 and the battery cap 3, namely the self-plugging rivet 4 not only has the function of sealing the liquid injection hole, but also has the function of connecting the current collecting disc 5 and the battery cap 3.

The assembly process of this embodiment is briefly described as follows:

referring to fig. 1, the current collecting plate 5 is first abutted and welded to the positive end surface of the top of the inner core 2. Then, the battery cap 3 is fastened to the opening portion of the upper end of the battery can 1, and the battery cap 3 is welded to the battery can 1 at the outer peripheral edge of the battery cap 3 by one turn. After the electrolyte is injected through the injection hole 3a, the blind rivet 4 penetrates into the battery cap 3 and the current collecting tray 5, and the blind rivet 4 is subjected to rivet pulling by using a blind rivet gun, so that the blind rivet 4 is riveted and fixed in the injection hole 3 a. Then, the blind rivet and the battery cap 3 are welded at the outer edge of the blind rivet 4 for one round at the upper end surface of the battery cap 3.

In order to facilitate the assembly of the blind rivet 4, a rivet penetration hole 5a may be formed in the current collecting plate 5 in advance, and the blind rivet 4 is inserted into the rivet penetration hole 5a during the assembly, and then the blind rivet 4 is fixed by pulling the blind rivet with a blind rivet gun.

The rivet penetrating hole 5a is a flanging hole, and the flanging of the flanging hole is inserted into the liquid injection hole 3a in an abutting mode.

It should be noted that, a liquid injection hole may also be formed in the negative electrode cap of the battery, and the liquid injection hole at the negative electrode end is sealed and blocked by means of a blind rivet fixed by pulling rivets. Some cylindrical batteries, which do not have both ends open, have a bottomed cylindrical structure with only one end open and the other end closed, are provided with only one battery cap mounted to the opening of the battery case.

The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.

Claims

1. A lithium ion battery annotates liquid hole packaging structure includes:

a battery case (1) having an opening,

an inner core (2) accommodated in the battery case,

a battery cap (3) which is fixed on the opening part of the battery case in a sealing way and is provided with a liquid injection hole (3 a);

the self-plugging liquid injection device is characterized in that a self-plugging rivet (4) for sealing and plugging the liquid injection hole (3a) is fixed in the liquid injection hole (3a) through rivet pulling.

2. The lithium ion battery electrolyte injection hole packaging structure according to claim 1, wherein a current collecting disc (5) is welded and fixed on the inner core (2), and the current collecting disc (5) and the battery cap (3) are riveted and fixed by the blind rivet (4).

3. The lithium ion battery electrolyte injection hole packaging structure according to claim 2, wherein a rivet penetration hole (5a) is formed in the current collecting plate (5) in a penetrating manner, and the blind rivet (4) penetrates into the rivet penetration hole (5 a).

4. The lithium ion battery liquid injection hole packaging structure according to claim 3, wherein the rivet hole (5a) is a flanging hole, and the flanging of the flanging hole is inserted into the liquid injection hole (3 a).

5. The lithium ion battery liquid filling hole packaging structure according to claim 2, wherein the battery case (1) is a cylindrical structure with two open ends, the battery cap (3) is arranged at the opening part of one end of the battery case (1), and the opening part of the other end of the battery case (1) is sealed and fixed with a second battery cap.

6. The lithium ion battery liquid injection hole packaging structure according to claim 2, wherein the battery case (1) is a cylindrical structure with one open end and the other closed end and a bottom, and the battery cap (3) is arranged at the open end of the battery case (1).

7. The lithium ion battery electrolyte injection hole packaging structure according to claim 2, wherein the current collecting plate (5) is arranged in an abutting manner with the positive electrode end face of the inner core (2) and is welded and fixed.

8. The lithium ion battery electrolyte injection hole packaging structure according to claim 2, wherein the current collecting plate (5) is attached to the negative end face of the inner core (2) and welded and fixed.

9. The lithium ion battery electrolyte injection hole packaging structure according to claim 1, wherein the battery cap (3) is welded and fixed with the battery case (1).

10. The lithium ion battery liquid injection hole packaging structure according to claim 1, wherein the blind rivet (4) is welded and fixed with the battery cap (3).