CN215118995U

CN215118995U - Film rolling device

Info

Publication number: CN215118995U
Application number: CN202090000226.0U
Authority: CN
Inventors: 汤辉; 汤志为; 杨凯; 郑付成; 黄东海; 琚云东; 朱纬亚; 张卫东; 高云峰
Original assignee: Han s Laser Technology Industry Group Co Ltd
Current assignee: Shenzhen Han Nationality Beirui Equipment Co ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2021-12-10
Anticipated expiration: 2030-01-21
Also published as: WO2021146928A1

Abstract

A film winding device comprises a film winding base (10), a left winding drum (21) and a right winding drum (22) which are used for winding a film group, and a left clamp (31) and a right clamp (32) which are used for clamping the film group; the film clamping device is characterized by further comprising a left sliding block (41), a right sliding block (42), an ejector pin (50) and an elastic reset piece (60) enabling the left sliding block (41) and the right sliding block (42) to generate a relative approaching trend, wherein the left sliding block (41) and the right sliding block (42) are arranged on the needle rolling base (10) in a sliding mode, the ejector pin (50) penetrates through the needle rolling base (10) in a movable mode, when a film group needs to be clamped, the ejector pin (50) is inserted between the left sliding block (41) and the right sliding block (42), the left clamp (31) and the right clamp (32) are made to approach relatively, and the film group is clamped; in the mode of pushing the sliding blocks towards the two sides through the ejector pins, the film group can be tightly clamped by the left clamp and the right clamp as long as the ejector pins are not separated, the structure is simple, the stability is high, and the yield of the battery cell is improved; after the electric core is wound, the ejector pin is separated from the space between the left sliding block and the right sliding block, the left winding drum and the right winding drum are relatively close to each other, the whole volume is reduced, the left winding drum and the right winding drum are separated from contact with an inner ring of the electric core, the winding drum is drawn out, materials can be prevented from being brought, and the rejection rate of the electric core is greatly reduced.

Description

Film rolling device

Technical Field

The utility model relates to a lithium cell processing technology field, especially a roll up membrane device.

Background

The electric core of the lithium battery adopts a spiral winding structure. And sequentially superposing the aluminum foil, the isolating film, the copper foil and the isolating film to form a film group, then tightly winding the film group into the battery cell through a film winding device according to a certain sequence, and finally drawing out the film group to be separated from the battery cell to finish the winding of the battery cell. Each step of the process influences the productivity and yield of the battery cell, the stable and efficient film winding device is very critical to use, and the film winding device has a great promoting effect on the development of the lithium battery industry.

However, the existing film winding device is mainly driven to clamp through the air cylinder, the stability is poor, and the problems that the film group is not clamped tightly to cause winding failure, and a battery core is scrapped due to the fact that a belt material is used when a winding needle is withdrawn are often caused. Therefore, further improvements are needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a roll up membrane device, aim at solving current roll up membrane device and appear easily that the membrane group presss from both sides not tightly lead to coiling failure, roll up the needle and lead to electric core to scrap the scheduling problem when withdrawing from the area material.

The utility model provides a technical scheme that its technical problem adopted is: the film winding device comprises a film winding base, a left winding drum, a right winding drum, a left clamp and a right clamp, wherein the left winding drum and the right winding drum are used for winding a film group; the needle rolling device is characterized by further comprising a left sliding block, a right sliding block, an ejector pin and an elastic reset piece, wherein the elastic reset piece enables the left sliding block and the right sliding block to generate a relatively approaching trend;

the thimble is inserted between the left sliding block and the right sliding block, and pushes the left sliding block and the right sliding block to be relatively far away, so that the left clamp and the right clamp are relatively close to each other, and the left winding drum and the right winding drum are relatively far away from each other;

the thimble breaks away from between left slider and the right slider, elasticity returns the piece promotion left slider and right slider are close to relatively, make left side clip and right clip keep away from relatively, make left reel and right reel are close to relatively.

Further, the left clamp is arranged on the needle rolling base, and the right clamp is arranged on the left sliding block; when the left slider and the right slider are relatively far away, the left clamp and the right clamp are relatively close to each other.

Further, the left winding drum is arranged on the winding needle seat, and the right winding drum is arranged on the right sliding block; when the left slider and the right slider are relatively far away, the left reel and the right reel are relatively far away.

Further, the film rolling device further comprises a left rolling needle and a right rolling needle, the left rolling needle is arranged on the rolling needle seat, and the left clamp and the left winding drum are both arranged on the left rolling needle; the right winding needle is arranged on the right sliding block, and the right winding drum is arranged on the right winding needle.

Further, the avoidance groove for accommodating the right clamp is formed in the right winding needle.

Furthermore, the left clamp is mounted on the left winding needle through a buffer assembly, the buffer assembly comprises a first guide shaft and a buffer spring, the left clamp is connected with the left winding needle through the first guide shaft, and the buffer spring is sleeved on the first guide shaft and is positioned between the left clamp and the left winding needle; when the left clamp is pressed, the left clamp can move along the first guide shaft and compress the buffer spring.

Further, be equipped with the holding tank on the roll needle file, be equipped with the second guiding axle in the holding tank, left side slider and right slider all are located in the holding tank, and follow the second guiding axle slides.

Further, roll up the needle file and include the base and install upper cover and fixed plate on the base, the holding tank is seted up on the base, a left side is rolled up the needle setting and is in on the upper cover, wearing to establish of thimble activity on the fixed plate.

Furthermore, the elastic reset pieces are two reset springs; and the left sliding block and the right sliding block are both provided with mounting holes for mounting elastic reset pieces.

Furthermore, a first step surface and a second step surface are arranged at the free end of the ejector pin, and the first step surface is lower than the second step surface in height and is connected through a transition surface; when the second step surface is located between the left sliding block and the right sliding block, the left clamp and the right clamp are relatively close to each other, and clamping is achieved.

Compared with the prior art, the utility model provides a pair of roll up membrane device when needs press from both sides tight membrane group, inserts between left slider and the right slider with the thimble, makes left clip and right clip be close to relatively, realizes pressing from both sides tight membrane group. This kind of mode through thimble toward both sides top slider as long as the thimble does not break away from, just can make left clip and right clip tightly clip the membrane group, simple structure, stability are high, improve the yields of electric core.

In addition, when the left clamp and the right clamp tightly clamp the film group, the left winding drum and the right winding drum are relatively far away, and the film group is convenient to wind. After the battery cell is wound, the ejector pin is separated from the space between the left sliding block and the right sliding block, the left clamp and the right clamp are driven to be relatively far away, and the film group is loosened. Simultaneously, left reel and right reel are close to relatively, reduce whole volume, and break away from the contact with electric core inner circle, take out the reel like this and can prevent the area material, greatly reduced electric core's disability rate.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic view illustrating a film winding state of the film winding device provided by the present invention;

FIG. 2 is an exploded view of the film winding assembly of FIG. 1;

FIG. 3 is another exploded view of the film winding assembly of FIG. 1;

FIG. 4 is a partially exploded schematic view of the film rolling apparatus of FIG. 1;

FIG. 5 is a schematic structural diagram of the left and right sliders of FIG. 4 mounted on the base;

FIG. 6 is an enlarged partial view of the free end of the thimble shown in FIG. 4.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model provides a film winding device, which comprises a needle winding base 10, a left reel 21 and a right reel 22 for winding a film group, and a left clamp 31 and a right clamp 32 for clamping the film group. The needle rolling device further comprises a left sliding block 41, a right sliding block 42, an ejector pin 50 and an elastic resetting piece 60 enabling the left sliding block 41 and the right sliding block 42 to generate a relatively close trend, the left sliding block 41 and the right sliding block 42 are arranged on the needle rolling base 10 in a relatively sliding mode, and the ejector pin 50 penetrates through the needle rolling base 10 in a movable mode. Wherein, the membrane group comprises an aluminum foil A, an isolating membrane B, a copper foil C and an isolating membrane B.

When the film group needs to be clamped, the free end of the thimble 50 is inserted between the left slider 41 and the right slider 42, the left slider 41 and the right slider 42 are pushed to be relatively far away, the left clamp 31 and the right clamp 32 are relatively close, and the film group is clamped. This kind of mode through thimble 50 toward both sides top slider, as long as thimble 50 does not break away from, just can make left clip 31 and right clip 32 tightly clip the membrane group, simple structure, stability are high, improve the yields of electric core.

In addition, when the left clamp 31 and the right clamp 32 tightly clamp the film group, the left winding drum 21 and the right winding drum 22 are relatively far away, so that the film group is convenient to wind. After the winding of the battery cell is completed, the free end of the thimble 50 is separated from between the left slider 41 and the right slider 42, and the elastic resetting piece 60 pushes the left slider 41 and the right slider 42 to be relatively close to each other, so that the left clip 31 and the right clip 32 are relatively far away from each other, and the film group is loosened. Meanwhile, the left winding drum 21 and the right winding drum 22 are relatively close to each other, the whole size is reduced, and the left winding drum and the right winding drum are separated from contact with the inner ring of the battery cell, so that the winding drum is drawn out, the material can be prevented from being brought, and the rejection rate of the battery cell is greatly reduced.

Specifically, the film rolling device further comprises a left rolling needle 71 and a right rolling needle 72, the free end of the thimble 50 is inserted between the left slider 41 and the right slider 42, the left slider 41 and the right slider 42 are pushed to be relatively far away, the left rolling needle 71 and the right rolling needle 72 are relatively far away, and the left winding drum 21 and the right winding drum 22 are relatively far away. The free end of the thimble 50 is separated from between the left slider 41 and the right slider 42, and the elastic restoring element 60 pushes the left slider 41 and the right slider 42 to relatively approach each other, so that the left winding needle 71 and the right winding needle 72 relatively approach each other, and further the left reel 21 and the right reel 22 relatively approach each other.

As shown in fig. 3, the needle winding base 10 includes a base 11, and an upper cover 12 and a fixing plate 13 mounted on the base 11, and the thimble 50 is movably inserted into the fixing plate 13. The sliding direction of the thimble 50 is perpendicular to the sliding directions of the left slider 41 and the right slider 42.

In the present embodiment, the left winding needle 71 is disposed on the winding needle base 10, specifically, mounted on the upper cover 12. The left clip 31 is provided on the left winding needle 71, and the right clip 32 is provided on the left slider 41. When the left slide block 41 and the right slide block 42 are relatively far away, the left clamp 31 and the right clamp 32 are relatively close to each other, and the film group is clamped.

In order to avoid the membrane module slipping off, the side of the left clamp 31 and the right clamp 32 which is in contact with the membrane module is also provided with a convex pattern which increases the friction force.

To prevent the membrane module from being damaged by the momentary pressure increase, the left clamp 31 is mounted on the left winding needle 71 via a buffer assembly. In this embodiment, the buffer assembly includes a first guide shaft (not shown) and a buffer spring 81, the left clip 31 is connected to the left winding pin 71 through the first guide shaft, and the buffer spring 81 is sleeved on the first guide shaft and located between the left clip 31 and the left winding pin 71. When the left clamp 31 is pressed, it can move along the first guide shaft and compress the buffer spring 81, playing a role of buffering.

Referring to fig. 1 and 3, the left reel 21 is provided on the left winding needle 71, the right winding needle 72 is provided on the right slider 42, and the right reel 22 is provided on the right winding needle 72. Namely, the left winding needle 71 and the left winding drum 21 are not moved, and the right winding needle 72 and the right winding drum 22 are driven by the right slider 42 to be close to or far from the left winding needle 71 and the left winding drum 21.

Since the right clip 32 is disposed on the left slider 41, the right winding needle 72 is disposed on the right slider 42, and the left slider 41 is located closer to the right slider 42. Thus, right clip 32 is relatively close to right wrap pin 72. In order to make the structure more compact, an avoiding groove 73 is formed on one side of the right rolling needle 72 close to the right clamp 32. When the free end of the thimble 50 is separated from the space between the left slider 41 and the right slider 42, the left slider 41 and the right slider 42 are abutted against each other, and the right clip 32 is located in the avoiding groove 73.

In order to facilitate the matching of the winding needle and the winding drum, the inner walls of the left winding drum 21 and the right winding drum 22 are provided with positioning grooves 23 matched with the winding needle. The outer walls of the left winding drum 21 and the right winding drum 22 are also provided with grooves 24, so that the contact area is reduced, and the battery cell can be conveniently drawn out. When the left winding drum 21 and the right winding drum 22 are relatively far away, the left winding drum 21 and the right winding drum 22 which are far away form a standard cylinder integrally, and the film group is convenient to wind. Wherein, the outer walls of the left reel 21 and the right reel 22 are also coated with special coatings, so that the membrane group can not be lost.

As shown in fig. 4, the base 11 of the needle rolling base 10 is provided with a receiving groove 14, a second guiding shaft 15 is arranged in the receiving groove 14, and the left slider 41 and the right slider 42 are both located in the receiving groove 14 and slide along the second guiding shaft 15. Wherein, holding tank 14 is the U type, and its two lateral walls play limiting displacement to left slider 41 and right slider 42. Since the aluminum foil, the film set, the copper foil, and the film set are relatively thin, the stroke of the left slider 41 and the right slider 42 is relatively small, and the film set can be surely inserted between the left clip 31 and the right clip 32.

In order to make the left slider 41 and the right slider 42 slide more smoothly, the linear bearing 16 may be fitted over the second guide shaft 15. Then, the left slider 41 and the right slider 42 are respectively fitted over the linear bearings 16.

In order to make the installation of the right winding needle 72 more stable, a baffle 43 is further provided on the right slider 42. When the right winding needle 72 is provided on the right slider 42, the right winding needle 72 and the shutter 43 abut against each other (refer to fig. 3).

In this embodiment, the elastic restoring member 60 is a restoring spring, and has two. Mounting holes 44 for mounting the elastic reset pieces 60 are formed in the left slider 41 and the right slider 42, one end of each reset spring is inserted into the mounting holes 44, and the other end of each reset spring abuts against the inner wall of the accommodating groove 14. The two return springs push the left slider 41 and the right slider 42 towards the middle simultaneously from both sides, creating a tendency to approach relatively. Without the external force, the left slider 41 and the right slider 42 abut together.

As shown in fig. 5, in order to facilitate the thimble 50 to act on the two sliders, the left slider 41 and the right slider 42 are both provided with a protrusion 45. The lug 45 pushes the sliding block to move, so that the size of the sliding block is reduced, and materials are saved. The slider and the protrusion are integrally formed, and the sliding direction of the thimble 50 is perpendicular to the second guide shaft 15.

As shown in fig. 6, the free end of the thimble 50 is provided with a first step surface 51 and a second step surface 52, and the first step surface 51 is lower than the second step surface 52 and is connected by a transition surface 53. This configuration facilitates insertion of the thimble 50 between the two projections 45 and also facilitates maintenance of the locked state. The transition surface 53 may be an inclined surface or a curved surface, so that the first step surface 51 and the second step surface 52 are smoothly transited, and the thimble 50 is conveniently and smoothly inserted.

Referring to fig. 3 and 5 together, when the free end of the thimble 50 is inserted between the two protrusions 45, the first step surface 51 enters between the two protrusions 45, so that the left clip 31 and the right clip 32 are relatively close to each other. Further, the second step surface 52 is positioned between the left slider 41 and the right slider 42, so that the left clamp 31 and the right clamp 32 are further close to each other, and the film group is clamped. Under the condition of no external force, the second step surface 52 is kept between the left slider 41 and the right slider 42, and the locking state can be kept. The free end of the thimble 50 is separated from between the two bumps 45, and the elastic reset piece 60 pushes the left slider 41 and the right slider 42 to relatively approach each other, so as to realize reset, and the left clip 31 and the right clip 32 are kept open.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. A film winding device comprises a film winding base, a left winding drum and a right winding drum which are used for winding a film group, and a left clamp and a right clamp which are used for clamping the film group, and is characterized by further comprising a left sliding block, a right sliding block, an ejector pin and an elastic reset component which enables the left sliding block and the right sliding block to generate a relatively close trend, wherein the left sliding block and the right sliding block are arranged on the film winding base in a relatively sliding manner, and the ejector pin is movably arranged on the film winding base in a penetrating manner;

2. The film rolling device according to claim 1, wherein the left clip is arranged on the needle rolling seat, and the right clip is arranged on the left sliding block; when the left slider and the right slider are relatively far away, the left clamp and the right clamp are relatively close to each other.

3. The film rolling device according to claim 2, wherein the left winding drum is arranged on the winding needle seat, and the right winding drum is arranged on the right sliding block; when the left slider and the right slider are relatively far away, the left reel and the right reel are relatively far away.

4. The film rolling device according to claim 3, further comprising a left rolling needle and a right rolling needle, wherein the left rolling needle is arranged on the rolling needle seat, and the left clamp and the left winding drum are both arranged on the left rolling needle; the right winding needle is arranged on the right sliding block, and the right winding drum is arranged on the right winding needle.

5. The film rolling device according to claim 4, wherein the right rolling needle is provided with an avoiding groove for accommodating the right clamp.

6. The film rolling device according to claim 4, wherein the left clip is mounted on the left rolling needle through a buffer assembly, the buffer assembly comprises a first guide shaft and a buffer spring, the left clip is connected with the left rolling needle through the first guide shaft, and the buffer spring is sleeved on the first guide shaft and is located between the left clip and the left rolling needle; when the left clamp is pressed, the left clamp can move along the first guide shaft and compress the buffer spring.

7. The film rolling device according to claim 4, wherein a receiving groove is formed on the needle rolling seat, a second guiding shaft is arranged in the receiving groove, and the left sliding block and the right sliding block are both located in the receiving groove and slide along the second guiding shaft.

8. The film rolling device according to claim 7, wherein the needle rolling seat comprises a base, and an upper cover and a fixing plate mounted on the base, the receiving groove is formed on the base, the left needle is disposed on the upper cover, and the ejector pin is movably disposed on the fixing plate in a penetrating manner.

9. The film rolling device according to any one of claims 1 to 8, wherein the elastic reset pieces are two reset springs; and the left sliding block and the right sliding block are both provided with mounting holes for mounting elastic reset pieces.

10. The film rolling device according to any one of claims 1 to 8, wherein the free end of the ejector pin is provided with a first step surface and a second step surface, the first step surface is lower than the second step surface in height and is connected through a transition surface; when the second step surface is located between the left sliding block and the right sliding block, the left clamp and the right clamp are relatively close to each other, and clamping is achieved.