CN215118982U

CN215118982U - Plastic and support connection structure under lithium battery and lithium battery

Info

Publication number: CN215118982U
Application number: CN202120645798.0U
Authority: CN
Inventors: 李阳; 赵生荣; 谭明胜; 李倩伟; 何巍
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-12-10
Anticipated expiration: 2031-03-30

Abstract

The utility model provides a plastic and leg joint structure and lithium cell under lithium cell, including lower plastic and support, set up the guide way on the side of lower plastic and seted up spacing chamber on the diapire of guide way, the support includes lamellar body and screens post, the screens post sets up on the lamellar body, be provided with the screens boss on the end of screens post, the support is used for when buckling mutually with lower plastic, so that the guide way is worn to locate by the screens boss, and then make screens boss card arrange spacing intracavity in, utilize the guide effect of guide way, make the screens boss can slide in spacing intracavity and realize the joint, make the support can once only pressfitting mould down, and the wrong problem of knot can not appear, and can realize quick pressfitting, thereby improve packaging efficiency.

Description

Plastic and support connection structure under lithium battery and lithium battery

Technical Field

The utility model relates to a lithium cell field especially relates to a plastic and leg joint structure and lithium cell under lithium cell.

Background

A lithium battery is a battery using a nonaqueous electrolyte solution and lithium metal or a lithium alloy as a negative electrode material, and therefore such a battery is also called a lithium metal battery. Unlike other batteries, lithium batteries have the characteristics of high charge density, long service life, high unit cost and the like.

The lithium battery is divided into a square lithium battery, a cylindrical lithium battery and a button lithium battery according to the appearance, can be divided into an aluminum shell lithium battery, a steel shell lithium battery and a soft package battery according to an outer packaging material, and can be divided into a cobalt acid lithium battery, a ferric phosphate lithium battery, a lithium manganate lithium battery and a lithium polymer battery according to a positive electrode material.

The square aluminum shell lithium battery is a battery formed by accommodating an electric core into an aluminum shell and then buckling a battery cover on the aluminum shell, and can be attached and installed with lower plastic cement on the battery cover in order to prevent short circuit between the battery cover and the electric core, and then a bracket is buckled on the lower plastic cement, however, the current bracket has the following problems in the assembly process: firstly, the bracket is fixed by adopting a traditional buckle mode, the size of the traditional buckle is necessarily small in order to ensure enough elastic deformation, however, the buckle with too small size can cause the problem of wrong buckling when buckled, namely, the bracket is difficult to buckle in place at one time when buckled, and the bracket is often required to be buckled repeatedly, so that the problem of inconvenient assembly of the battery cover is brought; secondly, at present, two brackets are needed, which means that the two brackets need to be buckled twice, so that the assembly efficiency is too low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing a plastic and leg joint structure under lithium cell, can realize that disposable pressfitting targets in place, and can not appear buckleing wrong problem, can realize quick pressfitting moreover to improve packaging efficiency.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a plastic and leg joint structure under lithium cell, includes:

the plastic comprises a lower plastic, wherein a guide groove is formed in one side surface of the lower plastic, and a limiting cavity is formed in the bottom wall of the guide groove; and

the support, the support includes lamellar body and screens post, the screens post set up in on the lamellar body, be provided with the screens boss on the end of screens post, the support be used for with when plastic looks lock down, so that the screens boss wears to locate the guide way, and then makes the screens boss card is arranged in spacing intracavity.

In one embodiment, the interface diameter of the guide groove and the limiting cavity is smaller than the maximum inner diameter of the limiting cavity.

In one embodiment, the inner diameter of the guide groove gradually decreases towards the direction close to the limiting cavity.

In one embodiment, the guide groove is a conical guide groove.

In one embodiment, the locking post is a conical locking post, and the conical locking post is matched with the conical guide groove.

In one embodiment, the maximum outer diameter of the clamping boss is larger than the junction diameter of the guide groove and the limiting cavity, and the maximum outer diameter of the clamping boss is smaller than the maximum inner diameter of the limiting cavity.

In one embodiment, the clamping boss is a soft rubber clamping boss.

In one embodiment, the structure for connecting the lower plastic of the lithium battery and the bracket further comprises a cover plate, and the cover plate is arranged on the side surface of the lower plastic, which is far away from the bracket.

In one embodiment, the guide groove is provided with a plurality of guide grooves, the bottom wall of each guide groove is provided with a limiting cavity, the clamping columns are provided with a plurality of clamping bosses, the tail end of each clamping column is provided with a clamping boss, and when the bracket is buckled with the lower plastic, the clamping bosses are correspondingly clamped in the limiting cavities one by one.

A lithium battery comprises a lower plastic and support connecting structure of any one of the lithium batteries.

Compared with the prior art, the utility model discloses at least, following advantage has:

the utility model discloses a plastic and leg joint structure and lithium cell under lithium cell, including lower plastic and support, set up the guide way on the side of lower plastic and seted up spacing chamber on the diapire of guide way, the support includes lamellar body and screens post, the screens post sets up on the lamellar body, be provided with the screens boss on the end of screens post, the support is used for when buckling mutually with lower plastic, so that the guide way is worn to locate by the screens boss, and then make screens boss card arrange spacing intracavity in, utilize the guide effect of guide way, make the screens boss can slide in spacing intracavity and realize the joint, make the support can once only pressfitting plastic down, and the wrong problem of knot can not appear, and can realize quick pressfitting, thereby improve packaging efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a connection structure of a lower plastic and a bracket of a lithium battery according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the connection structure of the lower plastic and the bracket of the lithium battery shown in FIG. 1;

FIG. 3 is a schematic view of a partial structure of a connection structure of a lower plastic and a bracket of the lithium battery shown in FIG. 1;

fig. 4 is a partially enlarged structural view at a in fig. 2.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It is noted that as used herein, reference to an element being "connected" to another element also means that the element is "in communication" with the other element, and fluid can be in exchange communication between the two.

Referring to fig. 1 and 2, a lower plastic and bracket connection structure 10 for a lithium battery includes a lower plastic 200 and a bracket 300, a guide groove 210 is formed on one side surface of the lower plastic 200, and a limiting cavity 220 is formed on a bottom wall of the guide groove 210, the bracket 300 includes a sheet body 310 and a clamping post 320, the clamping post 320 is disposed on the sheet body 310, a clamping boss 330 is disposed at a terminal of the clamping post 320, and the bracket 300 is used for engaging with the lower plastic 200, so that the clamping boss 330 penetrates through the guide groove 210, and the clamping boss 330 is clamped in the limiting cavity 220.

It should be noted that a guide groove 210 is formed on one side surface of the lower plastic 200, and a limit cavity 220 is formed on the bottom wall of the guide groove 210; further, screens post 320 is installed and is fixed on lamellar body 310, then at the end of screens post 320, that is to say be provided with screens boss 330 on the end that screens post 320 kept away from lamellar body 310, so, when buckling support 300 to down on plastic 200, screens boss 330 can pass from guide way 210, then enter into spacing chamber 220 under the guide effect of the inside wall of guide way 210 in, so, utilize the juncture of guide way 210 and spacing chamber 220 to carry out the screens to screens boss 330, thereby make support 300 can be reliably in the same place with lower plastic 200 lock, and utilize the inside wall of guide way 210 to carry out the guide effect to boss 330, make support 300 lock can be more convenient and fast when plastic 200 down, realize that disposable lock targets in place, and can accurate lock, the wrong circumstances of detaining can not appear.

Referring to fig. 1 and fig. 2 again, in one embodiment, the lithium battery lower plastic and bracket connection structure 10 further includes a cover plate 100, and the cover plate 100 is disposed on a side surface of the lower plastic 200 away from the bracket 300. It should be noted that, the lower plastic 200 is attached to the cover plate 100, in an embodiment, the cover plate 100 is an aluminum cover plate, and the lower plastic 200 is formed by injection molding, but the lower plastic 200 and the cover plate 100 are integrally formed, for example, when the cover plate 100 is placed in a mold, the lower plastic 200 can be integrally formed on the surface of the cover plate 100, so that the firmness between the lower plastic 200 and the cover plate 100 can be improved, and the lower plastic 200 and the cover plate 100 can be prevented from being peeled off.

Referring to fig. 3, in an embodiment, the lower plastic 200 includes a supporting pillar 230, and the guiding groove 210 is located on the supporting pillar 230, it should be noted that the guiding groove 210 is formed on the supporting pillar 230, so that the structural strength of the lower plastic 200 can be enhanced to a certain extent, and the lower plastic 200 is prevented from being deformed by force during the process of buckling or uncovering the bracket 300; in one embodiment, the width of the support posts 230 is not less than 3mm, and the height of the support posts 230 is not greater than 20 mm.

Referring to fig. 2 and 4, in one embodiment, a boundary diameter D between the guide groove 210 and the limiting cavity 220 is smaller than a maximum inner diameter H of the limiting cavity 220; the maximum outer diameter F of the locking boss 330 is greater than the boundary diameter D between the guide groove 210 and the limiting cavity 220, and the maximum outer diameter F of the locking boss 330 is less than the maximum inner diameter H of the limiting cavity 220.

It should be noted that, in order to ensure that the clamping boss 330 falls into the limiting cavity 220 to realize the clamping function, the boundary diameter D of the guide groove 210 and the limiting cavity 220 is set to be smaller than the maximum inner diameter H of the limiting cavity 220, the maximum outer diameter F of the clamping boss 330 is set to be larger than the boundary diameter D of the guide groove 210 and the limiting cavity 220, and the boundary diameter D of the guide groove 210 and the limiting cavity 220 is not smaller than 1.5mm, for example, the boundary diameter D of the guide groove 210 and the limiting cavity 220 is 2mm, the maximum inner diameter H of the limiting cavity 220 is 2.2mm, and the maximum outer diameter F of the clamping boss 330 is 2.1mm, so that after the clamping boss 330 enters the limiting cavity 220 from the guide groove 210, the clamping boss 330 is clamped by using the boundary inner wall of the guide groove 210 and the limiting cavity 220, so as to realize that the bracket 300 is fastened and fixed on the lower plastic 200; in one embodiment, the depth L of the guide groove 210 is between 1mm and 20mm, for example, the depth L of the guide groove 210 may be 5mm, 10mm, 15 mm.

Referring to fig. 2 and 4 again, in one embodiment, the inner diameter E of the guide groove 210 gradually decreases toward the limiting cavity 220. It should be noted that, internal diameter E through setting up guide way 210 reduces along with being close to spacing chamber 220 gradually, make the inside wall of guide way 210 be equivalent to a funnel, so, after screens boss 330 fell into guide way 210, can finally slide in spacing chamber 220 under the guide effect of guide way 210 inside wall, so, make support 300 not align completely even when the position when the lock is on plastic 200 down, finally also can be smoothly fixed with plastic 200 lock down, the lock precision has been improved, effectively avoid the wrong problem of lock.

In one embodiment, the guide groove 210 is a conical guide groove. Thus, the guide groove 210 is a conical guide groove, and the limiting cavity 220 is located at the deepest part of the guide groove 210, so that the clamping boss 330 can slide in more conveniently; in one embodiment, the locking post 320 is a conical locking post, and the conical locking post is matched with the conical guide groove, that is, after the locking boss 330 enters the limiting cavity 220 along the guide groove 210, the locking post 320 is matched with the guide groove 210 for accommodation, so that the bracket 300 can be limited and fixed, and the bracket 300 is prevented from being shifted relative to the lower plastic 200.

In one embodiment, the locking boss 330 is a soft rubber locking boss. It should be noted that, the positioning boss 330 is made of soft rubber, so that the positioning boss 330 can better enter the limiting cavity 220 from the boundary inner wall of the guide groove 210 and the limiting cavity 220.

In one embodiment, the guide slots 210 are provided in plural, the bottom wall of each guide slot 210 is provided with a plurality of limiting cavities 220, the plurality of clamping posts 320 are provided, the tail end of each clamping post 320 is provided with a clamping boss 330, and when the bracket 300 is fastened to the lower plastic 200, the clamping bosses 330 are correspondingly clamped in the limiting cavities 220. It should be noted that, the plurality of positioning posts 320 and the plurality of guide grooves 210 are arranged to cooperate with each other in a one-to-one manner, so that the stability of the bracket 300 fastened to the lower plastic 200 can be improved, and the bracket 300 can be firmer.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a plastic and leg joint structure under lithium cell which characterized in that includes:

2. The plastic and bracket connection structure under lithium battery as claimed in claim 1, wherein the boundary diameter of the guide groove and the limiting cavity is smaller than the maximum inner diameter of the limiting cavity.

3. The plastic and bracket connection structure under lithium battery as claimed in claim 2, wherein the inner diameter of the guide groove gradually decreases toward the direction approaching the limit cavity.

4. The plastic and bracket connection structure under lithium battery as claimed in claim 3, wherein the guide groove is a conical guide groove.

5. The plastic and bracket connection structure under lithium battery as claimed in claim 4, wherein the position-locking column is a conical position-locking column, and the conical position-locking column matches with the conical guide groove.

6. The plastic and support connection structure under lithium cell of claim 2 or 4, characterized in that, the biggest external diameter of screens boss is greater than the diameter of juncture of guide way and spacing chamber, and the biggest external diameter of screens boss is less than the biggest internal diameter in spacing chamber.

7. The plastic and bracket connection structure under lithium battery as claimed in claim 1, wherein the retaining boss is a soft rubber retaining boss.

8. The plastic and bracket connection structure under lithium battery as claimed in claim 1, further comprising a cover plate disposed on a side of the lower plastic away from the bracket.

9. The plastic and bracket connection structure for a lithium battery as claimed in claim 1, wherein the guide groove has a plurality of grooves, the bottom wall of each guide groove has a limiting cavity, the plurality of positioning posts have a plurality of positioning bosses, the end of each positioning post has a positioning boss, and when the bracket is fastened to the lower plastic, the positioning bosses are engaged with the limiting cavities one by one.

10. A lithium battery comprising the lithium battery lower plastic and support connecting structure of any one of claims 1 to 9.