CN211885489U

CN211885489U - Flattening device for lithium ion battery diaphragm extraction tank

Info

Publication number: CN211885489U
Application number: CN202020191346.5U
Authority: CN
Inventors: 袁晓林; 肖武华; 高东波; 王金波
Original assignee: Changzhou Xingyuan New Energy Material Co ltd
Current assignee: Changzhou Xingyuan New Energy Material Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-11-10
Anticipated expiration: 2030-02-20

Abstract

The utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device, establish including extraction tank roller and cover the exhibition flat structure at extraction tank roller both ends, exhibition flat structure includes two semicircle rings and is used for fixing two the fixed part of semicircle ring. The mode of establishing flat structure at the both ends cover of extraction tank roller is adopted, can dismantle and install, and the ring has certain height, has certain tensile force after the jack-up to flat effect has been played, and because two semicircle ring are fixed to have formed the ring structure, consequently do not influence the motion of film at the inslot, the phenomenon of wrinkling of film has been solved, and overcome conventional flat device of exhibition and skidded not changeing and lose the problem of effect in liquid environment.

Description

Flattening device for lithium ion battery diaphragm extraction tank

Technical Field

The utility model belongs to the technical field of the lithium ion battery diaphragm manufacturing technique and specifically relates to a lithium ion battery diaphragm extraction tank exhibition is flat device is related to.

Background

At present, the preparation process of the lithium ion battery diaphragm mainly comprises two steps: dry processes (platelet separation) and wet processes (thermally induced phase separation). The wet process can control the pore size, distribution and porosity well, so that the membrane is generally used for manufacturing high-end membranes, and wet membrane products are favored by the market in recent years. In the production process of the wet diaphragm, a solvent with a high boiling point and low volatility is used as a pore-forming agent, and in the extraction process, the solvent with a low boiling point and high volatility is used for eluting the pore-forming agent, so that micropores are formed in the diaphragm.

In the asynchronous stretching production process of the wet diaphragm, the diaphragm enters an extraction tank after being stretched transversely, the thickness of the edge part of the diaphragm is usually much thicker than that of the diaphragm stretched in the middle due to a chain clamp, the diaphragm enters the extraction tank to cause wrinkling and curling, and the wrinkled diaphragm leaves traces in extraction liquid, so that the product is scrapped due to defects; and the crimping can cause the increase of the cost, even because of the crimping, the secondary transverse pulling and the unclamping phenomenon are serious.

A flattening device is not generally designed in an extraction tank of a domestic diaphragm manufacturer, or a common flattening device has poor effect, wrinkling and curling phenomena cannot be effectively removed in the actual use process, and in the special environment of the extraction tank, the diaphragm deviates and breaks away from a conventional flattening device such as a shear roller or a compression roller, and the existence of liquid causes slippage and immobility, so that the flattening effect cannot be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a lithium ion battery diaphragm extraction tank exhibition paper-back edition is put can solve the film because through the transverse stretching back, its limit portion forms the thick limit because the chain presss from both sides the back, gets into the extraction tank because the phenomenon of corrugating that the thickness difference leads to greatly to the problem that conventional exhibition paper-back edition was slipped and is not changeed and lose the effect in liquid environment has been overcome.

In a first aspect, an embodiment of the utility model provides a lithium ion battery diaphragm extraction tank exhibition is flat to be put, establish including extraction tank roller and cover the exhibition flat structure at extraction tank roller both ends, it includes two semicircle rings and is used for fixed two to put down flat structure the fixed part of semicircle ring.

The utility model discloses lithium ion battery diaphragm extraction tank exhibition paper-back edition is put and is had following beneficial effect at least:

the embodiment of the utility model adopts the mode that the two ends of the extraction tank roller are sleeved with the flattening structures, the two semicircular rings of the flattening structures are fixed on the extraction tank roller through the friction between the two semicircular rings and the roller, the semicircular rings can be prevented from rotating and slipping on the extraction tank roller, can be disassembled and assembled, when in use, the flattening structure is arranged at the inner side of the thick edge of the film, separates the thick edge from the film with normal thickness in the middle, blocks the influence of the thick edge on the middle, has a certain height with the ring, has a certain tension force after being jacked up, thereby achieving the flattening effect, and because the two semicircular rings are fixed to form a circular ring structure, the movement of the film in the groove is not influenced, the problem that after the film is transversely stretched is solved, the thick edge is formed after the edge part is clamped by the chain clamp, and the thick edge enters the extraction tank to wrinkle due to overlarge thickness difference, and the problem that the effect is lost due to the fact that the conventional flattening device slips and does not rotate in a liquid environment is solved.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, two the semicircle ring is provided with sunk structure in the junction, sunk structure butt joint forms the recess, fixed part set up in the recess.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, fixed part includes stationary blade and threaded fastener, sunk structure is provided with the screw hole, be provided with on the stationary blade and correspond the through-hole of screw hole, threaded fastener passes through screw hole and through-hole will the stationary blade with two the semicircle ring is connected.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition is flat to be put, height after threaded fastener fixed mounting is no longer than the height of recess.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, threaded fastener is the screw.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, the thickness of semicircle ring is 5mm ~ 50 mm.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, the scope of the difference between the outer lane radius of semicircle ring and the inner circle radius is 5mm ~ 50 mm.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, the material of semicircle ring is polytetrafluoroethylene.

According to the utility model discloses a lithium ion battery diaphragm extraction tank exhibition flat device of other embodiments, the material of fixed part is the stainless steel.

Drawings

FIG. 1 is a schematic structural diagram of a flattening device for a lithium ion battery diaphragm extraction cell in a first embodiment;

fig. 2 is a schematic structural view of a flattened structure of some embodiments of the present invention;

fig. 3 is a side view and a top view of a flattened structure of some embodiments of the present invention.

Detailed Description

The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, but not for indicating or implying that the indicated device or element 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 description of the embodiments of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" on another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, connected, or mounted on the other feature. In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.

Referring to fig. 1, a schematic structural diagram of a flattening device for a membrane extraction tank of a lithium ion battery in a first embodiment is shown. In this embodiment, the flattening device for the extraction tank of the lithium ion battery diaphragm comprises an extraction tank roller 100 and two flattening structures 200 sleeved at two ends of the extraction tank roller 100, wherein each flattening structure 200 comprises two semicircular rings and a fixing part (not shown in the figure), the two semicircular rings are sleeved on the extraction tank roller 100 and are fixed by the fixing part to form a circular ring structure, before the film 300 enters the extraction tank, as a result of transverse stretching, the edge parts of the film are clamped by chain clamps to form a thick edge part 310 and a middle normal thickness part 320, during installation, the flattening structures 200 are positioned at the inner side of the thick edge part 310, so that the thick edge part 310 and the middle normal thickness part 320 of the film 300 are separated, thereby blocking the influence of the thick edge part 310 on the middle part, playing a blocking effect, thereby solving the wrinkling phenomenon, and because the circular ring formed by the two semicircular rings of the flattening structures 200 has a certain height, after being jacked up, the film has certain tension force, thereby achieving the effect of flattening.

Referring to fig. 2, a schematic structural view of a flattened structure of some embodiments of the present invention is shown. The flattening structure 200 includes two semicircular rings 210, the two semicircular rings 210 have a concave structure at the joint, the concave structures are butted to form a groove 211, in order to fix the two half rings 210 using the fixing member 220, a screw hole is provided on the recess structure of the half ring 210, that is, the groove 211 has a threaded hole therein to facilitate the fixing of the two semicircular rings 210 by the fixing component 220 to form a circular ring structure and to be sleeved on the extraction tank roller, in this embodiment, the fixing component 220 includes a fixing plate 221 and a threaded fastener 222, the threaded fastener 222 is a screw, a through hole is provided on the fixing plate 221, the threaded fastener 222 passes through the through hole on the fixing plate 221 and the threaded hole in the groove 211, the fixing plate 221 is used to connect the two semicircular rings 210 to form a circular ring structure, the height of the threaded fastener 222 after being fixedly installed does not exceed the height of the groove 211, and the protrusion of the threaded fastener 222 is prevented from affecting the flattening of the film.

According to some embodiments of the present invention, the material of the semi-circular ring 210 is teflon, and the material of the fixing member 220 is 304 stainless steel.

Referring to fig. 3, showing the side view and the top view of the flat structure according to some embodiments of the present invention, the left side in fig. 3 is the side view of the flat structure, the right side in fig. 3 is the top view of the flat structure, the range of the semicircular ring thickness a of the flat structure in some embodiments is 5mm to 50mm, and the range of the difference B between the outer ring radius and the inner ring radius of the semicircular ring is 5mm to 50 mm.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. The utility model provides a lithium ion battery diaphragm extraction tank exhibition flat device which characterized in that establishes including extraction tank roller and cover the exhibition flat structure at extraction tank roller both ends, exhibition flat structure includes two semicircle rings and is used for fixing two the fixed part of semicircle ring.

2. The lithium ion battery diaphragm extraction cell flattening device of claim 1, wherein two semicircular rings are provided with a concave structure at the joint, the concave structures are butted to form a groove, and the fixing part is arranged in the groove.

3. The lithium ion battery diaphragm extraction cell flattening device of claim 2, wherein the fixing part comprises a fixing plate and a threaded fastener, the recessed structure is provided with a threaded hole, a through hole corresponding to the threaded hole is formed in the fixing plate, and the threaded fastener connects the fixing plate with the two semicircular rings through the threaded hole and the through hole.

4. The lithium ion battery diaphragm extraction cell flattening apparatus of claim 3, wherein the height of the threaded fastener after fixed installation does not exceed the height of the groove.

5. The lithium ion battery separator extraction cell flattening apparatus of claim 3, wherein the threaded fastener is a screw.

6. The lithium ion battery diaphragm extraction cell flattening apparatus of any one of claims 1 to 5, wherein the thickness of the semicircular ring is 5mm to 50 mm.

7. The lithium ion battery diaphragm extraction cell flattening apparatus of any one of claims 1 to 5, wherein the difference between the outer ring radius and the inner ring radius of the semicircular ring ranges from 5mm to 50 mm.

8. The lithium ion battery membrane extraction cell flattening device of any one of claims 1 to 5, wherein the material of the semicircular ring is polytetrafluoroethylene.

9. The lithium ion battery membrane extraction cell flattening apparatus of any one of claims 1 to 5, wherein the material of the fixing component is stainless steel.