CN211412577U

CN211412577U - Film spreading mechanism

Info

Publication number: CN211412577U
Application number: CN201921651718.1U
Authority: CN
Inventors: 郭文奎; 王迪; 马亮
Original assignee: Longpowers Technology Ningxia Co ltd
Current assignee: Baoli New Energy Technology Co.,Ltd.
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-09-04
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a film coating and stretching mechanism, which comprises an arc-shaped flattening roller, a thread flattening roller, a circulating water cooling roller and a compressed air pipe; the arc-shaped flattening roller for coating is positioned above the threaded flattening roller, a coating film from the high-temperature oven passes through the arc-shaped flattening roller and the threaded flattening roller, and the arc-shaped flattening roller and the threaded flattening roller jointly act on the coating film for flattening; the stretched coating film bypasses above the circulating water cooling roller for cooling; and the compressed air pipe blows compressed air to the stretched membrane and the lug of the coating film. The utility model discloses the shrink that the mechanism can effectively solve the copper foil and toast the back through the high temperature oven and appear warp and lead to filming and crumple, fall the material, even because of the copper foil utmost point ear limit crumple, warp and lead to rectifying the range too big and cause the cracked condition of diaphragm, can delay the crumple condition and can prevent that the diaphragm from going out the influence of the too big and vapor of difference in temperature behind the oven to the diaphragm quality, this mechanism can improve the qualification rate of filming greatly, reduce scrapping of diaphragm, improve the quality of filming.

Description

Film spreading mechanism

Technical Field

The utility model relates to a lithium ion battery negative pole is scribbled, especially relates to the extension mechanism that scribbles that lithium ion battery negative pole was scribbled.

Background

With the extensive application of lithium ion batteries in various industries, the production and manufacturing of lithium ion batteries gradually enter a prosperous development stage, after a stage of pursuing yield, each manufacturer must improve the quality of the batteries and reduce the production cost in order to improve the competitiveness, the yield of products must be improved and the scrap rate of the products must be reduced in order to control the cost, and the most intuitive reduction of the scrap rate is to reduce the scrap rate of a coating film in a coating stage.

SUMMERY OF THE UTILITY MODEL

Film to wrinkle in order to solve the negative pole, improve the product percent of pass problem, the utility model discloses the effect of mechanism can the at utmost reduce the deformation of wrinkling of filming to the exhibition of cooling down is carried out the exhibition to deformation utmost point ear.

A coating film stretching mechanism comprises an arc-shaped flattening roller, a thread flattening roller, a circulating water cooling roller and a compressed air pipe;

the arc flattening roller is positioned above the thread flattening roller, a coating film from the high-temperature oven passes through the arc flattening roller and the thread flattening roller, and the arc flattening roller and the thread flattening roller flatten the coating film under the combined action;

the stretched coating film bypasses above the circulating water cooling roller for cooling;

and the compressed air pipe blows compressed air to the stretched membrane and the lug of the coating film.

Preferably, the arc nip roll includes that an arc fixed mandrel and both ends pass through the support frame of bearing installation, and adjusting hand wheel is installed in one of them support frame outside, and the outside cover of fixed mandrel has the arc rubber shell, adjusts the utmost point ear position contact of arc rubber shell lowest and coating through adjusting hand wheel.

Preferably, the left-handed and right-handed threads are symmetrically distributed on the surface of the thread flattening roller from the center to two sides, when the coating film contacts the surface of the thread flattening roller, the coating film and the threads inclined towards two sides on the roller surface generate friction, and the inclined threads expand the base material to two ends so that the base material is flattened.

Preferably, the interior of the circulating water cooling roller adopts a hollow structure, and cooling water flows through the hollow structure.

Preferably, the compressed air pipe comprises a main air pipe, two universal bamboo joint air pipes are connected to the main air pipe, and compressed air in the main air pipe is blown to the membrane and the lug of the coating film through the universal bamboo joint air pipes through the adjusting air valve.

The utility model has the advantages that:

the utility model discloses a film and stretch out mechanism, the diaphragm is flattened through arc nip roll and screw thread nip roll combined action after going out the oven, cool down through the circulating water chill roll again and prevent copper foil shrink deformation, cool down to diaphragm utmost point ear region through universal bamboo joint pipe by compressed air again, it is flat to put forward, can effectively solve the shrink deformation that the copper foil appears after the high temperature oven toasts and lead to filming and crumple, fall the material, crumple because of copper foil utmost point ear limit even, the deformation leads to rectifying the range too big and cause the cracked condition of diaphragm, delay the crumple condition and can prevent that the diaphragm from going out the oven after the difference in temperature is too big and produce the influence of vapor to the diaphragm quality. The mechanism can greatly improve the qualified rate of film coating, reduce scrapping of the film and improve the quality of the film coating.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the arcuate nip roll of FIG. 1;

FIG. 3 is a schematic view of the threaded nip roll of FIG. 1;

FIG. 4 is a schematic view of the cooling roll of FIG. 1;

fig. 5 is a schematic view of the compressed air slub air duct in fig. 1.

Detailed description of the invention

Referring to fig. 1, the practical cathode coating spreading mechanism comprises an arc-shaped spreading roller 1, a threaded spreading roller 2, a circulating water cooling roller 3 and a compressed air duct 4; the arc-shaped flattening roller 1 is positioned above the threaded flattening roller 2, a coating film 5 from the high-temperature oven passes through the arc-shaped flattening roller 1 and the threaded flattening roller 2, and the coating film is flattened under the combined action of the arc-shaped flattening roller 1 and the threaded flattening roller 2; the stretched coating film 5 bypasses from the upper part of the circulating water cooling roller 3 for cooling; the compressed air duct 4 blows compressed air to the membrane 51 and the tab 52 of the stretched coating film 5.

As shown in fig. 2, the arc flattening roller 1 comprises an arc-shaped fixed mandrel and support frames 12 with two ends mounted through bearings, wherein an adjusting hand wheel 13 is mounted on the outer side of one support frame, an arc-shaped rubber shell 11 is sleeved outside the fixed mandrel, the arc-shaped rubber shell 11 with bearings rotates together through the adjusting hand wheel, the fixed mandrel is fixed during rotation, and the lowest part of the adjusted arc-shaped rubber shell is in contact with the position of a tab 52 of a film 5 so as to achieve the effect of flattening the tab.

As shown in fig. 3, the surface of the thread flattening roller 2 is symmetrically provided with left and right-handed threads from the center to both sides, when the coating film contacts the surface, the coating film rubs against the threads inclined to both sides of the roller surface, and the inclined threads expand the base material toward both ends, so that the base material is flattened.

As shown in fig. 4, the inside of the circulating water cooling roller 3 is of a hollow structure, a water inlet 31 and a water outlet 32 are respectively arranged at two ends of the circulating water cooling roller, and cooling water flows through the hollow structure, so that the roller is always kept in a low-temperature state, a cooling effect on the diaphragm is achieved, and the diaphragm is prevented from being deformed due to stretching.

As shown in fig. 5, the compressed air duct 4 includes a main air duct 41, two universal bamboo joint air ducts 42 are connected to the main air duct, and compressed air in the main air duct 41 is blown to the membrane 51 and the tab 52 of the coating film through the universal bamboo joint air ducts 42 via the adjusting air valve.

The utility model discloses mainly solve the negative pole and film out the problem that the oven crumpled, because receive tensile tension and high temperature effect after the high temperature oven comes out along the coating, film process requirement in the middle of in addition and both sides leave blank utmost point ear position, this leads to utmost point ear position atress shrink in the middle of the diaphragm, both sides utmost point ear begins to curl because of the high temperature effect, at this moment, utmost point ear process arc roller lower with middle utmost point ear by this mechanism arc

flattening roller

1 and 2 combined action of screw thread flattening roller, guarantee its utmost point ear position contact atress, extrusion through arc roller and screw thread, the screw thread by the screw thread of screw thread roller slope expands the substrate to both ends, make the substrate can the exhibition, arc roller mechanism 1 can adjust through the 12 pairs of rollers compacted elasticity degrees of support frame, can adjust hand wheel to the radian of arc roller and diaphragm contact through adjusting hand wheel 13 again.

The diaphragm is cooled again through the cooling roller after being flattened, so that the secondary curling and contraction of the base material are prevented.

Compressed air blows through the diaphragm that universal bamboo joint pipe goes out the oven, and this part primary action is just to the diaphragm cooling, and the regulation through duckbilled mouth air output again flattens utmost point ear position, can prevent again that the diaphragm from going out the oven back because the great fog that produces of difference in temperature, avoids gluing the appearance of roller phenomenon, solves through the combined action of each part and coats the stretch problem.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A coating film stretching mechanism is characterized by comprising an arc flattening roller, a thread flattening roller, a circulating water cooling roller and a compressed air pipe;

2. The film spreading mechanism according to claim 1, wherein: the arc nip roll comprises an arc-shaped fixed mandrel and support frames, wherein the two ends of the arc-shaped fixed mandrel are installed on the support frames through bearings, an adjusting hand wheel is installed on the outer side of one support frame, an arc-shaped rubber shell is sleeved outside the fixed mandrel, and the lowest part of the arc-shaped rubber shell is adjusted to be in contact with the position of a pole lug of a coating film through the adjusting hand wheel.

3. The film spreading mechanism according to claim 2, wherein: the surface of the thread flattening roller is symmetrically provided with left-handed and right-handed threads from the center to two sides, when a coating film contacts the surface of the thread flattening roller, the coating film and the threads inclined to two sides on the roller surface generate friction, and the inclined threads expand the base material to two ends, so that the base material can be flattened.

4. The film spreading mechanism according to claim 3, wherein: the inside of the circulating water cooling roller adopts a hollow structure, and cooling water flows through the hollow structure.

5. The film spreading mechanism according to claim 4, wherein: the compressed air pipe comprises a main air pipe, two universal bamboo joint air pipes are connected to the main air pipe, and compressed air in the main air pipe is blown to the membrane and the lug of the coating film through the universal bamboo joint air pipes through the adjusting air valve.