阅读说明：本技术 一种超宽超薄金属锂及其合金带材的制备方法 (Preparation method of ultra-wide and ultra-thin metal lithium and alloy strip thereof ) 是由 李良彬 朱实贵 李玉成 邹贵明 曾少军 陈金文 张小亮 谌文坚 岳贤峰 汤伟清 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种超宽超薄金属锂及其合金带材的制备方法。所述超宽超薄金属锂及其合金带材的制备方法包括以下步骤：步骤A：选取规格为0.15mm*80～110mm的胚料；步骤B：将保护膜放置在轧机的一个放卷装置上,牵引经过轧辊,最后缠绕在一个收卷装置上；步骤C：将所述胚料放置在所述轧机的另一个放卷装置上。本发明的超宽超薄金属锂及其合金带材的制备方法,通过采用覆双膜精轧、贴膜收卷方法,使用粘着力不同的两种膜,既减少收卷张力对带材的影响,还避免与轧辊直接接触,在减小带材厚度及加大带材宽度的同时,保证带材厚度与宽度的均匀一致性,杜绝带材在轧制口堆积、褶皱等现象,减少带材出现开叉、断裂、边浪等不良现象,提高了带材的质量稳定性。(The invention discloses a preparation method of ultra-wide and ultra-thin metal lithium and an alloy strip thereof. The preparation method of the ultra-wide and ultra-thin metal lithium and the alloy strip thereof comprises the following steps: step A: selecting a blank with the specification of 0.15mm x 80-110 mm; and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device; and C: and placing the blank on the other unwinding device of the rolling mill. According to the preparation method of the ultra-wide and ultra-thin metal lithium and the alloy strip thereof, the double-film-covering finish rolling and film-pasting winding methods are adopted, and the two films with different adhesive forces are used, so that the influence of winding tension on the strip is reduced, the direct contact with a roller is avoided, the uniform consistency of the thickness and the width of the strip is ensured while the thickness of the strip is reduced and the width of the strip is increased, the phenomena of accumulation, folding and the like of the strip at a rolling opening are avoided, the undesirable phenomena of splitting, fracture, edge wave and the like of the strip are reduced, and the quality stability of the strip is improved.)

1. A preparation method of ultra-wide and ultra-thin metal lithium and alloy strips thereof is characterized in that: the method comprises the following steps:

step A: selecting a blank with the specification of 0.15mm x 80-110 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on another unwinding device of the rolling mill, and preparing ultra-wide and ultra-thin metal lithium and alloy strips thereof with the thickness of 0.01-0.05mm and the width of 110-;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

2. The method for preparing ultra-wide and ultra-thin lithium metal and the alloy strip thereof according to claim 1, wherein the method comprises the following steps: the protective film in the step B comprises a first film layer and a second film layer, wherein the first film layer and the second film layer are both provided with organic silicon adhesives, and the adhesive force of the first film layer is greater than that of the second film layer.

3. The method for preparing ultra-wide and ultra-thin lithium metal and the alloy strip thereof according to claim 2, wherein the method comprises the following steps: the first film layer and the second film layer are both made of a polyethylene terephthalate material.

4. The method for preparing ultra-wide and ultra-thin lithium metal and the alloy strip thereof according to claim 1, wherein the method comprises the following steps: and D, the rolling film in the step D is an OPP protective film.

Technical Field

The invention belongs to the field of metal lithium and alloy deep processing production, and particularly relates to a preparation method of ultra-wide and ultra-thin metal lithium and an alloy strip thereof.

Background

With the rapid development of industries such as portable electronic equipment, unmanned aerial vehicles, electric vehicles and the like, the requirement on the specific capacity of the lithium ion secondary battery is higher and higher. The theoretical specific capacity of the metal lithium is high, the oxidation-reduction potential is low, and the metal lithium has obvious advantages when used as the negative electrode of the lithium ion battery. Research shows that when the metal lithium and the alloy strip thereof are used as the negative electrode, the wider and thinner the metal lithium and the alloy strip thereof are, the production cost of the battery can be reduced, the discharge current of the battery can be increased, the power and the capacity of the battery can be improved, the heat dissipation area can be increased, the discharge temperature can be reduced, the discharge current can be increased, and the safety performance can be improved.

At present, in some fields, particularly the field of electric automobiles, the requirements on the width and the thickness of metal lithium and alloy strips thereof are high, and particularly, the thickness of the metal lithium and the alloy strips thereof used in an all-solid-state lithium battery is generally required to be less than 50 μm.

The existing process usually adopts a mode of combining extrusion and rolling to prepare ultra-wide and ultra-thin metal lithium and alloy strips thereof, but in the actual operation process, the metal lithium and the alloy strips thereof are thin and have high viscosity and are easy to adhere to a roller, so that the problems of folds, fractures, accumulation, edge waves and the like are caused to be accumulated at a rolling feeding port, and the rolling process cannot be smoothly carried out.

Disclosure of Invention

Based on the above, the invention is completed for solving the defects in the prior art, and the invention aims to provide a preparation method of ultra-wide and ultra-thin metal lithium and alloy strips thereof.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation method of ultra-wide and ultra-thin metal lithium and alloy strips thereof comprises the following steps:

step A: selecting a blank with the specification of 0.15mm x 80-110 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on another unwinding device of the rolling mill, and preparing ultra-wide and ultra-thin metal lithium and alloy strips thereof with the thickness of 0.01-0.05mm and the width of 110-;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

Further, the protective film of the step B comprises a first film layer and a second film layer, wherein the first film layer and the second film layer are both provided with an organic silicon adhesive, and the adhesive force of the first film layer is greater than that of the second film layer.

Further, the first film layer and the second film layer are both made of a polyethylene terephthalate material.

Further, the rolling film of the step D is an OPP protective film.

According to the preparation method of the ultra-wide and ultra-thin metal lithium and the alloy strip thereof, two films with different adhesive forces are used by adopting a double-film-covering finish rolling and film-pasting winding method, so that the influence of winding tension on the strip is reduced, the direct contact with a roller is avoided, the uniform consistency of the thickness and the width of the strip is ensured while the thickness of the strip is reduced and the width of the strip is increased, the phenomena of accumulation, folding and the like of the strip at a rolling port are avoided, the adverse phenomena of splitting, fracture, edge wave and the like of the strip are reduced, the quality stability of the strip is improved, the ultra-wide and ultra-thin metal lithium and the alloy strip thereof with the thickness of 0.01-0.05mm and the width of 110-plus-210 mm are successfully rolled industrially, the requirements of customers on products of the type are met, the productivity of the company is liberated, the production cost is reduced, the market competitiveness is improved, and the economic benefit of the company is improved.

Detailed Description

The invention provides a preparation method of ultra-wide and ultra-thin metal lithium and alloy strips thereof, which is characterized by comprising the following steps:

step A: selecting a blank with the specification of 0.15mm x 80-110 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on another unwinding device of the rolling mill, and preparing ultra-wide and ultra-thin metal lithium and alloy strips thereof with the thickness of 0.01-0.05mm and the width of 110-;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel; preferably, because the strips are thin and soft, the rolling film is adopted to protect rolling, so that the phenomenon that subsequent use is influenced by adhesion among the strips is avoided, the problems of collapse, inward rolling and the like caused by excessive accumulation of the strips are also prevented by utilizing the stability of the rolling film, and a complete strip is obtained when a client uses the rolling film;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

Further, the protective film of the step B comprises a first film layer and a second film layer, wherein the first film layer and the second film layer are both provided with an organic silicon adhesive, and the adhesive force of the first film layer is greater than that of the second film layer.

Further, the first film layer and the second film layer are both made of a polyethylene terephthalate material. Therefore, the strip can be ensured to be only covered on the first film layer when being separated from the protective film, the phenomena of accumulation, folding and the like of the strip at a rolling opening are avoided, and the bad phenomena of breakage, edge waves, splitting and the like caused by the simultaneous pulling of the double films of the strip are avoided.

Furthermore, the rolling film in the step D is an OPP protective film, so that the rolling film is good in sticking performance and easy to peel.

According to the preparation method of the ultra-wide and ultra-thin metal lithium and the alloy strip thereof, two films with different adhesive forces are used by adopting a double-film-covering finish rolling and film-pasting winding method, so that the influence of winding tension on the strip is reduced, the direct contact with a roller is avoided, the uniform consistency of the thickness and the width of the strip is ensured while the thickness of the strip is reduced and the width of the strip is increased, the phenomena of accumulation, folding and the like of the strip at a rolling port are avoided, the adverse phenomena of splitting, fracture, edge wave and the like of the strip are reduced, the quality stability of the strip is improved, the ultra-wide and ultra-thin metal lithium and the alloy strip thereof with the thickness of 0.01-0.05mm and the width of 110-plus-210 mm are successfully rolled industrially, the requirements of customers on products of the type are met, the productivity of the company is liberated, the production cost is reduced, the market competitiveness is improved, and the economic benefit of the company is improved.

Example 1

Step A: selecting a blank with the specification of 0.15mm x 80 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on the other unwinding device of the rolling mill, and preparing an ultra-wide and ultra-thin metal lithium and alloy strip thereof with the thickness of 0.01mm and the width of 110mm by the aid of the roller;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

Example 2

Step A: selecting a blank with the specification of 0.15mm x 110 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on the other unwinding device of the rolling mill, and preparing an ultra-wide and ultra-thin metal lithium and alloy strip thereof with the thickness of 0.05mm and the width of 210mm by the aid of the roller;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

Example 3

Step A: selecting a blank with the specification of 0.15mm x 100 mm;

and B: placing the protective film on an unreeling device of a rolling mill, drawing the protective film through a roller, and finally winding the protective film on a reeling device;

and C: placing the blank on the other unwinding device of the rolling mill, and preparing an ultra-wide and ultra-thin metal lithium and alloy strip thereof with the thickness of 0.04mm and the width of 180mm by the aid of the roller;

step D: placing the reel on the other winding device of the rolling mill, and arranging a winding film unwinding device below the reel;

step E: firstly, winding the winding film on a reel, then winding a strip material on the winding film, starting continuous finish rolling to form a layer of winding film and a layer of strip material, and winding the layer of winding film and the layer of strip material on the reel;

step F: and (5) operating the step A to the step E to continuously produce the ultra-wide and ultra-thin metal lithium and the alloy strip thereof.

According to the preparation method of the ultra-wide and ultra-thin metal lithium and the alloy strip thereof, two films with different adhesive forces are used by adopting a double-film-covering finish rolling and film-pasting winding method, so that the influence of winding tension on the strip is reduced, the direct contact with a roller is avoided, the uniform consistency of the thickness and the width of the strip is ensured while the thickness of the strip is reduced and the width of the strip is increased, the phenomena of accumulation, folding and the like of the strip at a rolling port are avoided, the adverse phenomena of splitting, fracture, edge wave and the like of the strip are reduced, the quality stability of the strip is improved, the ultra-wide and ultra-thin metal lithium and the alloy strip thereof with the thickness of 0.01-0.05mm and the width of 110-plus-210 mm are successfully rolled industrially, the requirements of customers on products of the type are met, the productivity of the company is liberated, the production cost is reduced, the market competitiveness is improved, and the economic benefit of the company is improved.

The above description is only for the purpose of illustrating specific embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.