CN217485684U

CN217485684U - Lithium battery liquid injection hole sealing structure

Info

Publication number: CN217485684U
Application number: CN202221353269.4U
Authority: CN
Inventors: 王韬; 蒋远富; 吴伟军
Original assignee: Chuneng New Energy Co Ltd
Current assignee: Chuneng New Energy Co Ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-23
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to a new forms of energy lithium cell technical field discloses a lithium cell annotates liquid hole seal structure, including the lithium cell apron, be equipped with on the lithium cell apron and annotate the liquid hole, annotate the liquid hole and include first hole and second hole, the diameter of first hole is greater than the diameter of second hole upper end, and second downthehole stopper has rubber to block up, and the lower bottom surface of first hole scribbles PVC and glues, is stamped aluminum sealing sheet in the first hole. The utility model discloses lithium cell annotates liquid hole seal structure, effectively solve the sealed insecure problem of laser welding, improved the qualification rate of battery.

Description

Lithium battery liquid injection hole sealing structure

Technical Field

The utility model relates to a new forms of energy lithium cell technical field, concretely relates to lithium cell annotates liquid hole seal structure.

Background

At present, a liquid injection hole is formed in a cover plate of a power lithium battery, and after the cover plate is welded with a battery shell, liquid is injected into the battery through the liquid injection hole. After the liquid injection is finished, a metal aluminum sheet is plugged on the liquid injection hole, and the aluminum sheet is welded with the cover plate in a laser welding mode to ensure sealing.

The prior art mostly adopts laser welding's mode to seal, but because when pouring into electrolyte into, has electrolyte to remain around annotating the liquid hole, causes the influence to laser welding's leakproofness easily, because welding leakproofness is not good, and then leads to battery electrolyte to reveal and cause the battery to scrap, has increased manufacturing cost, also brings the wasting of resources, is more unfavorable for the environmental protection.

In addition, laser welding equipment is expensive, the requirement on production environment is high, and the operation is inconvenient.

Disclosure of Invention

The utility model aims at providing a lithium cell annotates liquid hole seal structure to the not enough of above-mentioned technique, effectively solve the sealed insecure problem of laser welding, improved the qualification rate of battery.

In order to realize the above purpose, the utility model discloses a lithium cell annotates liquid hole seal structure, including the lithium cell apron, be equipped with on the lithium cell apron and annotate the liquid hole, it includes first hole and second hole to annotate the liquid hole, first hole's diameter is greater than the diameter of second hole upper end, second downthehole stopper has the rubber to block up, first hole's lower bottom surface scribbles PVC and glues, first downthehole cover has aluminium sealing sheet.

Preferably, the lower half hole has a taper, and the diameter of the upper end of the lower half hole is larger than that of the lower end of the lower half hole, so that the rubber is prevented from being blocked and falling into the battery shell.

Preferably, the upper half hole is cylindrical, so that the sealing aluminum sheet can be conveniently placed.

Preferably, the rubber plug is in interference fit with the lower half hole, and the sealing performance is good.

Preferably, the upper half-hole and the lower half-hole are concentric.

Preferably, the PVC glue is uniformly coated on one circle of the lower bottom surface of the upper half hole.

Preferably, the diameter of the lower end of the rubber plug is smaller than that of the upper end of the lower half hole and larger than that of the lower end of the lower half hole, so that the rubber plug can be conveniently plugged into the liquid injection hole for sealing, and the rubber plug is prevented from falling into the battery shell.

Preferably, the height of the rubber plug is less than or equal to the height of the lower half hole, so as to avoid abutting against the aluminum sealing sheet.

Compared with the prior art, the utility model, have following advantage:

1. the problem of unreliable laser welding sealing is effectively solved, battery scrappage caused by sealing is reduced, the qualified rate of the battery is improved, and the manufacturing cost is reduced;

2. utilize the structure to glue and replace laser welding, convenient operation has reduced equipment input, effectively practices thrift the cost.

Drawings

FIG. 1 is a schematic structural view of a sealing structure of a lithium battery liquid filling hole of the present invention;

FIG. 2 is a schematic view of the structure of the fluid injection hole of FIG. 1.

The components in the figures are numbered as follows:

the lithium battery comprises a lithium battery cover plate 1, a liquid injection hole 2, an upper half hole 3, a lower half hole 4, a rubber plug 5, PVC (polyvinyl chloride) glue 6 and a sealing aluminum sheet 7.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all 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 is to 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 as a specific case by those skilled in the art.

As shown in fig. 1 and 2, a lithium battery liquid injection hole sealing structure, including lithium battery cover plate 1, be equipped with on the lithium battery cover plate 1 and annotate liquid hole 2, it includes first hole 3 and second hole 4 to annotate liquid hole 2, first hole 3 and second hole 4 are concentric, first hole 3 is cylindrical, second hole 4 has the tapering, the diameter of second hole 4 upper end is greater than the diameter of lower extreme, the diameter of first hole 3 is greater than the diameter of second hole 4 upper end, second hole 4 is filled with rubber stopper 5, the lower bottom surface of first hole 3 scribbles PVC and glues 6, first hole 3 inner lid has sealing aluminum sheet 7, in this embodiment, PVC glues 6 and evenly scribbles the round in bottom surface down.

In addition, in the embodiment, the diameter of the lower end of the rubber plug 5 is smaller than that of the upper end of the lower half hole 4 and larger than that of the lower end of the lower half hole 4, and the rubber plug 5 is in interference fit with the lower half hole 4.

In another embodiment, the rubber plug 5 has a height less than or equal to the height of the lower half-hole 4, avoiding its abutment against the sealing aluminium sheet 7.

When this embodiment uses, after lithium cell cover plate 1 and casing welding completion, pour into electrolyte through notes liquid hole 2 on the lithium cell cover plate 1, the back is accomplished in the electrolyte injection, stop up notes liquid hole 2 with rubber plug 5, can protect electrolyte not contaminated through rubber plug 5, because there is the tapering in half hole 4 down, the diameter of half hole 4 upper end is greater than the diameter of lower extreme, the diameter of 5 upper ends of rubber plug is greater than the diameter of half hole 4 lower end down, guarantee that rubber plug 5 can not fall into the battery case the inside, then scribble round PVC and glue 6 on the lower bottom surface of half hole 3, scribble and cover aluminum sealing sheet 7 after finishing, treat that PVC glues 6 and accomplish sealed promptly after doing.

The utility model discloses lithium cell annotates liquid hole seal structure has effectively solved the unreliable problem of laser welding seal, reduces because of sealed battery scrap that causes, has improved the qualification rate of battery, has reduced manufacturing cost; utilize the structure to glue and replace laser welding, convenient operation has reduced equipment input, effectively practices thrift the cost.

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 singular but may also refer to the plural.

It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used 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 of the same or different properties to each other.

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. The utility model provides a lithium cell annotates liquid hole seal structure, includes lithium cell apron (1), its characterized in that: be equipped with on lithium cell apron (1) and annotate liquid hole (2), annotate liquid hole (2) including first hole (3) and second hole (4), the diameter of first hole (3) is greater than the diameter of second hole (4) upper end, the stopper has rubber jam (5) in second hole (4), the lower bottom surface of first hole (3) scribbles PVC and glues (6), first hole (3) inner cup has aluminum sealing sheet (7).

2. The sealing structure for a lithium battery injection hole according to claim 1, wherein: the lower half hole (4) has taper, and the diameter of the upper end of the lower half hole (4) is larger than that of the lower end.

3. The sealing structure for a lithium battery injection hole according to claim 1, wherein: the upper half hole (3) is cylindrical.

4. The sealing structure for a lithium battery injection hole according to claim 1, wherein: the rubber plug (5) is in interference fit with the lower half hole (4).

5. The sealing structure for a lithium battery electrolyte injection hole according to claim 1, wherein: the upper half hole (3) and the lower half hole (4) are concentric.

6. The sealing structure for a lithium battery injection hole according to claim 1, wherein: the PVC glue (6) is evenly smeared on one circle of the lower bottom surface of the upper half hole (3).

7. The sealing structure for a lithium battery electrolyte injection hole according to claim 1, wherein: the diameter of the lower end of the rubber plug (5) is smaller than that of the upper end of the lower half hole (4) and is larger than or equal to that of the lower end of the lower half hole (4).

8. The sealing structure for a lithium battery injection hole according to claim 7, wherein: the height of the rubber plug (5) is less than or equal to that of the lower half hole (4).