CN211231998U

CN211231998U - Joint device for power battery production

Info

Publication number: CN211231998U
Application number: CN201921907082.2U
Authority: CN
Inventors: 单祖炫
Original assignee: Dongguan Tafel New Energy Technology Co Ltd; Jiangsu Tafel New Energy Technology Co Ltd; Shenzhen Tafel New Energy Technology Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-08-11
Anticipated expiration: 2029-11-07

Abstract

The utility model belongs to the technical field of power battery production facility, concretely relates to piecing devices of power battery production usefulness, including connect the body and with this body coupling laminating part as an organic whole connects, laminating part set up in a terminal surface that connects the body, laminating part's surface cover is equipped with the sealing member. Compared with the prior art, the utility model discloses a sealing member is established to the cover on the surface at pressfitting portion, can increase the volume of sealing member effectively to the compression deformation volume that makes the sealing member obtains the promotion that is showing, even take place slight wearing and tearing and warp and also can not lead to sealed bad, the accessible is adjusted its corresponding compression deformation volume and is controlled the gas tightness, does not influence the continuation use of sealing member, consequently, the problem that need frequently change the sealing washer in the traditional design has been solved, the cost of production has been saved greatly, the production efficiency is improved.

Description

Joint device for power battery production

Technical Field

The utility model belongs to the technical field of power battery production facility, concretely relates to piecing devices of power battery production usefulness.

Background

With the development of modern society and the enhancement of environmental awareness of people, more and more devices select a lithium battery as a power supply, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, so that a wide space is provided for the application and development of the lithium battery. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries. At present, three power batteries with cylindrical, soft package and square structures are mainly available in the market, and square hard-shell batteries are widely adopted by power battery manufacturers due to high safety performance and long cycle service life.

In the production process of the square power battery, vacuumizing and helium filling are one of the key links after secondary liquid injection of the battery, and the links are as follows: after the secondary liquid injection of the battery is finished, the battery is vacuumized to a certain value under the suction action of a vacuum pump through a joint of a helium filling nail pressing mechanism, a certain amount of helium is injected into the battery, and after the helium filling is finished, the nail inserting sealing is carried out on the liquid injection port. As shown in fig. 1-2, a joint structure of a helium filling nail pressing mechanism in the prior art is shown, wherein an annular installation groove 011 is formed on an end surface of a metal guide rod 01 of the joint, and a sealing ring 02 is embedded in the installation groove 011; when the joint is pressed with the liquid injection hole, the butt joint and the liquid injection hole are sealed through the sealing ring 02, but the sealing ring 02 is easy to deform and wear under long-term extrusion, so that the phenomenon of air leakage is caused, the quality and the production efficiency of a product are seriously affected, and meanwhile, the sealing ring needs to be frequently replaced, so that the production cost is greatly increased.

Therefore, a solution to the above-mentioned problems is desired.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects of the prior art, the connector device for producing the power battery is not easy to deform and wear, effectively prevents the phenomenon of air leakage, improves the quality and the production efficiency of products, and can prolong the service life of the device and greatly reduce the production cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a connector device for power battery production comprises a connector body and a pressing part connected with the connector body into a whole, wherein the pressing part is arranged on one end face of the connector body, and a sealing element is sleeved on the surface of the pressing part. The sealing element is used for ensuring the air tightness of the joint device and the battery liquid injection hole during pressing and playing a role in sealing; the sealing element is sleeved on the surface of the pressing part, so that the volume of the sealing element can be effectively increased, the compression deformation amount of the sealing element is improved, poor sealing cannot be caused even if slight abrasion and deformation occur, the air tightness can be controlled by adjusting the corresponding compression deformation amount, the continuous use of the sealing element is not influenced, and the production cost is greatly saved.

As right the utility model discloses in power battery production usefulness's improvement, the nip portion includes first nip portion and second nip portion, first nip portion with the joint body all with the second nip portion is connected.

As right the utility model discloses in power battery production usefulness's improvement, the inside of nip is provided with link up in first nip with the passageway of second nip, the sealing member be provided with the opening of passageway intercommunication. The channel is mainly used for gas in vacuumizing and helium filling and the passing of the sealing rubber nails, and plays a role in communication.

As right the utility model discloses in the improvement of piecing devices of power battery production usefulness, the external diameter of second pressfitting portion is greater than the external diameter of first pressfitting portion. When the pressing part is pressed with the battery liquid injection hole, the pressing force is applied, and the outer diameter of the second pressing part is larger than that of the first pressing part, so that on one hand, the structural connection strength between the first pressing part and the second pressing part can be enhanced, and the uniform stress of the pressing part is improved; on the other hand, the outer diameter of the first pressing part is smaller, and the size is smaller, so that the sealing element correspondingly sleeved on the outer surface of the first pressing part can have more sizes, the compression deformation amount of the sealing element is further increased, and the air tightness during pressing is further improved; in addition, the structure is convenient for easily sleeving the sealing element on the pressing part, so that quick installation is realized, and the production efficiency is improved.

As right the utility model discloses in power battery production usefulness's improvement, the outer wall of second pressfitting portion is provided with the bulge loop, the inside of sealing member be provided with the first recess that the bulge loop corresponds. Because the sealing member cover is established on the surface of nip portion, can cause the not hard up between sealing member and the nip portion in many times of extrusion processes to lead to the sealing member to break away from the nip portion, consequently, set up the bulge loop on the second nip portion, can the chucking sealing member effectively, play fixed effect, prevent the relative displacement of sealing member and nip portion.

As an improvement to the joint device for power battery production described in the present invention, the sealing member is an ethylene propylene diene monomer rubber member or an aldehyde fluoroether rubber member. The ethylene propylene diene monomer rubber piece or the aldehyde fluoroether rubber piece can play an effective sealing role, and meanwhile, the sealing piece has good corrosion resistance, prevents the electrolyte from corroding the sealing piece, and prolongs the service life of the sealing piece.

As an improvement to the joint device for power battery production described in the present invention, the inner contour of the sealing member matches with the outer contour of the press-fit portion. The arrangement is to enable the pressing part and the sealing piece to be tightly attached, and to improve the stability of the joint device when the joint device is pressed with the liquid injection hole.

As right the utility model discloses in the improvement of piecing devices of power battery production usefulness, the lateral part that connects the body is provided with connection interface, connection interface with the passageway intercommunication. The connecting interface is used for being connected with an external pipeline and is controlled by an electromagnetic valve, so that the functions of vacuumizing and helium filling are respectively realized.

As right the utility model discloses in power battery production usefulness's improvement, the joint body with the back of the body terminal surface of pressfitting portion is provided with the second recess, the second recess with the passageway intercommunication, the second recess with the coaxial setting of passageway. The second groove is used for being connected with a nail separating mechanism of the sealing rubber nails, and the sealing rubber nails enter from the second groove to realize the function of sealing the liquid injection hole of the battery; and in order to make the sealing rubber nail reach the liquid injection hole, the diameter of the channel is slightly larger than that of the sealing rubber nail, and meanwhile, the second groove and the channel are coaxially arranged, so that the resistance of the sealing rubber nail can be reduced, and the smoothness of sealing the sealing rubber nail is further improved.

As right the utility model discloses in the improvement of the piecing devices of power battery production usefulness, the joint body still is provided with the through-hole, the through-hole run through in the terminal surface of joint body. The through hole mainly plays a role in positioning, and the connector device can be accurately installed.

The beneficial effects of the utility model reside in that: compared with the prior art, the utility model discloses a sealing member is established to the cover on the surface at pressfitting portion, can increase the volume of sealing member effectively to the compression deformation volume that makes the sealing member obtains the promotion that is showing, even take place slight wearing and tearing and warp and also can not lead to sealed bad, the accessible is adjusted its corresponding compression deformation volume and is controlled the gas tightness, does not influence the continuation use of sealing member, consequently, the problem that need frequently change the sealing washer in the traditional design has been solved, the cost of production has been saved greatly, the production efficiency is improved.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided to explain the invention and not to constitute an undue limitation on the invention. In the drawings:

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is an exploded schematic view of the prior art;

FIG. 3 is one of the schematic structural diagrams of the present invention;

fig. 4 is a second schematic structural diagram of the present invention;

fig. 5 is an exploded view of the present invention;

FIG. 6 is a schematic view of the internal structure of the sealing member of the present invention;

wherein, 01-metal guide rod; 02-sealing ring; 011-mounting grooves; 1-a joint body; 2-a press fit; 3-a seal; 11-a connection interface; 12-a second groove; 13-a through hole; 21-a first press fit; 22-a second press fit; 23-a channel; 31-a first groove; 221-convex ring.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "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, and 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.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be 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 according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

As shown in fig. 3 to 6, a joint device for power battery production includes a joint body 1 and a press-fit portion 2 integrally connected with the joint body 1, the press-fit portion 2 is disposed on an end surface of the joint body 1, and a sealing member 3 is sleeved on a surface of the press-fit portion 2.

The sealing element 3 is mainly used for sealing to ensure the air tightness of the joint device and the battery liquid injection hole during pressing; compare in the traditional design of establishing the sealing washer in the recess inlays, establish sealing member 3 cover in this embodiment on the surface of nip portion 2, can increase sealing member 3's volume effectively to promote its compression deformation volume, in long-term work, even take place slight wearing and tearing and deformation can not lead to sealed bad phenomenon yet, the accessible is adjusted its corresponding compression deformation volume and is controlled the gas tightness, does not influence the continuation of sealing member 3 and use, has avoided the problem that needs often change the sealing washer. In order to further improve the air tightness and the corrosion resistance of the sealing element 3, the sealing element 3 can be made of ethylene propylene diene monomer rubber or aldehyde fluoroether rubber, so that the service life is effectively prolonged.

Preferably, the pressing part 2 includes a first pressing part 21 and a second pressing part 22, the first pressing part 21 and the connector body 1 are both connected to the second pressing part 22, a channel 23 penetrating through the first pressing part 21 and the second pressing part 22 is disposed inside the pressing part 2, and the sealing element 3 is provided with an opening communicating with the channel 23. The channel 23 serves primarily as a communication allowing the passage of gas during evacuation and helium charging and the sealing rubber nail.

Preferably, the outer diameter of the second nip 22 is larger than the outer diameter of the first nip 21. When the pressing part 2 is pressed with the battery liquid injection hole, the pressing force is applied, and the outer diameter of the second pressing part 22 is larger than that of the first pressing part 21, so that on one hand, the structural connection strength between the first pressing part 21 and the second pressing part 22 can be enhanced, and the uniform stress of the pressing part 2 is improved; on the other hand, because the outer diameter of the first pressing part 21 is smaller and the volume is smaller, the sealing element 3 correspondingly sleeved on the outer surface of the first pressing part 21 can have more volume, so that the compression deformation amount of the sealing element 3 is further increased, and the air tightness during pressing is further improved; in addition, the first pressing part 21 and the second pressing part 22 form a stepped structure, so that the sealing element 3 can be easily sleeved on the pressing part 2, rapid installation is realized, and production efficiency is improved.

Preferably, the outer wall of the second press fit portion 22 is provided with a protruding ring 221, and the inside of the sealing member 3 is provided with a first groove 31 corresponding to the protruding ring 221. Because the sealing element 3 is sleeved on the surface of the press-fit portion 2, looseness between the sealing element 3 and the press-fit portion 2 may be caused in a plurality of times of extrusion processes, so that the sealing element 3 is separated from the press-fit portion 2, therefore, the convex ring 221 is arranged on the second press-fit portion 22, so that the press-fit portion 2 and the sealing element 3 can be clamped, a fixing effect is achieved, and relative displacement between the sealing element 3 and the press-fit portion 2 is prevented.

Preferably, the inner contour of the seal 3 matches the outer contour of the press-fit 2. This is provided to enable the press-fit portion 2 and the sealing member 3 to be closely attached to each other, and to improve the stability when the joint device is pressed against the liquid injection hole.

Preferably, the joint body 1 is provided with a connection interface 11, a second groove 12 and a through hole 13, wherein the connection interface 11 is arranged on a side portion of the joint body 1, the second groove 12 is arranged on the other end surface opposite to the press-fit portion 2, the through hole 13 penetrates through the end surface of the joint body 1, the connection interface 11 and the second groove 12 are both communicated with the channel 23, and the second groove 12 and the channel 23 are coaxially arranged. The connecting interface 11 is used for connecting with an external pipeline, and the functions of vacuumizing and helium filling are respectively realized under the action of an electromagnetic valve; the second groove 12 is used for being connected with a nail separating mechanism of the sealing rubber nails, and the sealing rubber nails enter from the second groove 12 to realize the function of sealing the battery liquid injection hole; through-hole 13 then mainly plays the effect of location, guarantees that piecing devices can accurately install, and in this embodiment, through-hole 13's quantity sets up to three, nevertheless the utility model discloses not use this as the limit, can carry out reasonable adaptation according to the production demand of reality.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a piecing devices of power battery production usefulness which characterized in that: the connector comprises a connector body (1) and a pressing part (2) connected with the connector body (1) into a whole, wherein the pressing part (2) is arranged on one end face of the connector body (1), and a sealing element (3) is sleeved on the surface of the pressing part (2).

2. The connector device for power battery production as claimed in claim 1, wherein: the pressing part (2) comprises a first pressing part (21) and a second pressing part (22), and the first pressing part (21) and the connector body (1) are connected with the second pressing part (22).

3. The connector device for power battery production according to claim 2, characterized in that: the interior of the pressing part (2) is provided with a channel (23) which runs through the first pressing part (21) and the second pressing part (22), and the sealing element (3) is provided with an opening communicated with the channel (23).

4. The connector device for power battery production according to claim 2, characterized in that: the outer diameter of the second nip portion (22) is larger than the outer diameter of the first nip portion (21).

5. The connector device for power battery production according to claim 2, characterized in that: the outer wall of the second pressing portion (22) is provided with a convex ring (221), and a first groove (31) corresponding to the convex ring (221) is formed in the sealing element (3).

6. The connector device for power battery production as claimed in claim 1, wherein: the sealing element (3) is an ethylene propylene diene monomer rubber element or an aldehyde fluoroether rubber element.

7. The connector device for power battery production as claimed in claim 1, wherein: the inner contour of the seal (3) is adapted to the outer contour of the press-fit section (2).

8. The connector device for power battery production according to claim 3, wherein: the lateral part of the joint body (1) is provided with a connecting interface (11), and the connecting interface (11) is communicated with the channel (23).

9. The connector device for power battery production according to claim 3, wherein: the end face, back to the pressing portion (2), of the joint body (1) is provided with a second groove (12), the second groove (12) is communicated with the channel (23), and the second groove (12) and the channel (23) are coaxially arranged.

10. The connector device for power battery production as claimed in claim 1, wherein: the joint body (1) is further provided with a through hole (13), and the through hole (13) penetrates through the end face of the joint body (1).