CN207899864U

CN207899864U - Double lithium foil preparation facilities

Info

Publication number: CN207899864U
Application number: CN201820302528.8U
Authority: CN
Inventors: 殷久山; 于申军; 王腾; 陈晓铭
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; China Lithium Battery Technology Co Ltd; CALB Technology Co Ltd
Priority date: 2018-03-05
Filing date: 2018-03-05
Publication date: 2018-09-25
Anticipated expiration: 2028-03-05

Abstract

The utility model provides a kind of double lithium foil preparation facilities, including upper Rolling roller and lower Rolling roller, is equipped with isolation board between the upper Rolling roller and lower Rolling roller, when rolling, upper isolation film and upper lithium band is placed between upper Rolling roller and isolation board and is rolled；Lower isolation film and lower lithium band are placed between lower Rolling roller and isolation board and are rolled.By adjusting the speed ratio of upper Rolling roller, lower Rolling roller and isolation board, while preparing the lithium foil of two kinds of different-thickness；Roll and lithium band, lithium band and lithium band are separated using isolation film, isolation board, prevented viscous glutinous；Two lithium bands can be once rolled simultaneously, it is efficient；Lithium band covers on isolation film after rolling, solves the problems, such as that lithium band cannot be shifted because too thin.

Description

Double lithium foil preparation facilities

Technical field

The utility model is related to lithium ion battery production technical fields, more particularly to a kind of double lithium foil preparation facilities.

Background technology

Lithium ion battery has many advantages, such as output voltage height, effect without memory, at present extensively by battery of mobile phone, electricity Electrical automobile industry is applied；Meanwhile raising performance of lithium ion battery also becomes the problem of most being paid close attention in lithium electricity industry, especially carries High lithium battery capacity and the service life for extending lithium battery.

Important procedure is chemical conversion there are one in Production Process of Lithium Battery, and the purpose is to make during lithium battery initial charge Its negative terminal surface forms solid electrolyte film (SEI films).But the formation of SEI films can consume part lithium, cause material therefrom Thus the loss of lithium, battery capacity also reduce.In addition, during lithium battery recycles, SEI films can continue to consume and repair Multiple, dead lithium can continue to increase inside positive and negative anodes, and the capacity of battery continues to decline, and result in battery cycle life reduction.

Decline to reduce battery capacity caused by the irreversible consumption of lithium ion in first charge-discharge and recycling Problem supplements lithium ion battery negative electrode amount of activated lithium, so as to improve performance of lithium ion battery in advance.And it mends in advance The lithium filled is ultra-thin lithium band, and the method either synchronously or asynchronously rolled is usually used with preparation method for existing lithium, is rolled by control Pressure, speed of device topping roll and bottom roll processed etc. realize that the rolling of different-thickness lithium foil, this mode can only once be realized A kind of production of the lithium foil of thickness, and production efficiency is relatively low.

Utility model content

Technical problem to be solved in the utility model is：In order to overcome deficiency in the prior art, the utility model to carry For a kind of double lithium foil preparation facilities.

The utility model solves its technical problem technical solution to be taken：A kind of double lithium foil preparation facilities, including Upper Rolling roller and lower Rolling roller, between the upper Rolling roller and lower Rolling roller be equipped with isolation board, the upper Rolling roller with it is described every From upper roll path is formed between plate, lower roll path is formed between the lower Rolling roller and the isolation board.

Rolling thickness by adjusting mill speed than lithium band can be adjusted, therefore, further, the upper Rolling roller and every From the mill speed between plate than the mill speed between the lower Rolling roller and isolation board than identical or different.When rolling speed Spend than it is identical when can obtain the lithium band of same thickness up and down, when mill speed than it is different when, the lithium tape thickness obtained up and down is not Together.

A kind of double lithium foil preparation methods, including above-mentioned preparation facilities, it is further comprising the steps of：

When rolling, upper isolation film and upper lithium band are placed in the upper roll path between upper Rolling roller and isolation board, and on Lithium band is rolled between upper isolation film and isolation board between upper Rolling roller and isolation board, according to different after rolling The upper Rolling roller rotation linear velocity of lithium foil thickness adjustment is with isolation board movement speed at a constant-speed ratio；Meanwhile by lower isolation film under Lithium band is placed in the lower roll path between lower Rolling roller and isolation board, and lower lithium band is between lower isolation film and isolation board, It is rolled between lower Rolling roller and isolation board, linear velocity is rotated according to the lower Rolling roller of different lithium foil thickness adjustment after rolling With isolation board movement speed at a constant-speed ratio, with isolation board rub with the hands by upper Rolling roller rolling and roll upper lithium band thin, rolled under Roller processed and isolation board rub with the hands roll lower lithium band is rolled it is thin；The upper isolation film bonded after rolling is wound with upper lithium band, bonding Lower isolation film is wound with lower lithium band.

The utility model has the beneficial effects that：

1, roll and lithium band, lithium band and lithium band are separated using isolation film, isolation board, is prevented viscous glutinous；

2, two lithium bands can be once rolled simultaneously, it is efficient；

3, two kinds of different-thickness can simultaneously be prepared by adjusting the speed ratio of upper Rolling roller, lower Rolling roller and isolation board Lithium foil；

4, Rolling roller linear velocity and isolation board linear velocity form to rub with the hands and roll mode, it is micro- can lithium band to be rolled into thickness 3 at difference Rice ultra-thin lithium foil below；

5, lithium band covers on isolation film after rolling, and solves the problems, such as that lithium band cannot be shifted because too thin.

Description of the drawings

The utility model is described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the best embodiment of the utility model.

In figure：1, upper Rolling roller, 2, lower Rolling roller, 3, upper isolation film, 4, upper lithium band, 5, isolation board, 6, lower lithium band, 7, under Isolation film, 8, the upper isolation film of bonding and upper lithium band, 9, the lower isolation film of bonding and lower lithium band.

Specific implementation mode

The utility model is described in detail presently in connection with attached drawing.This figure is the schematic diagram of simplification, only in a schematic way Illustrate the basic structure of the utility model, therefore it only shows composition related with the utility model.

As shown in Figure 1, a kind of double lithium foil preparation facilities of the utility model, including upper Rolling roller 1 and lower Rolling roller 2, institute It states and is equipped with isolation board 5 between Rolling roller 1 and lower Rolling roller 2, formed and rolled between the upper Rolling roller 1 and the isolation board 5 Channel processed forms lower roll path between the lower Rolling roller 2 and the isolation board 5.

Rolling thickness by adjusting mill speed than lithium band can be adjusted, therefore, further, 1 He of upper Rolling roller Mill speed between isolation board 5 is than the mill speed between the lower Rolling roller 2 and isolation board 5 than identical or different.When Mill speed than it is identical when can obtain the lithium band of same thickness up and down, when mill speed than it is different when, the lithium band that obtains up and down Thickness is different.

When rolling, upper isolation film 3 and upper lithium band 4 are placed in the upper roll path between upper Rolling roller 1 and isolation board 5, And upper lithium band 4 is rolled between upper isolation film 3 and isolation board 5 between upper Rolling roller 1 and isolation board 5, according to rolling The upper Rolling roller 1 of different lithium foil thickness adjustment rotates linear velocity with 5 movement speed of isolation board into a constant-speed ratio after system；Meanwhile will under Isolation film 7 and lower lithium band 6 are placed in the lower roll path between lower Rolling roller 2 and isolation board 5, and lower lithium band 6 is located at lower isolation It between film 7 and isolation board 5, is rolled between lower Rolling roller 2 and isolation board 5, according to different lithium foil thickness tune after rolling Whole lower Rolling roller 2 rotates linear velocity with 5 movement speed of isolation board into a constant-speed ratio, is rubbed with the hands by upper Rolling roller 1 and isolation board 5 Roll upper lithium band 4 is rolled it is thin, by lower Rolling roller 2 and isolation board 5 rub with the hands roll lower lithium band 6 is rolled it is thin；On being bonded after rolling every It is wound from film and upper lithium band 8, the lower isolation film of bonding is wound with lower lithium band 9.Can by adjusting upper Rolling roller 1, under The speed ratio of Rolling roller 2 and isolation board 5, while preparing the lithium foil of two kinds of different-thickness.

It is enlightenment, through the above description, relevant work with the above-mentioned desirable embodiment according to the utility model Personnel can carry out various changes and amendments in without departing from the scope of the utility model completely.This item utility model Technical scope is not limited to the contents of the specification, it is necessary to determine its technical scope according to right.

Claims

1. a kind of double lithium foil preparation facilities, it is characterised in that：Including upper Rolling roller (1) and lower Rolling roller (2), the upper Rolling roller (1) it is equipped with isolation board (5) between lower Rolling roller (2), is formed and is rolled between the upper Rolling roller (1) and the isolation board (5) Channel processed forms lower roll path between the lower Rolling roller (2) and the isolation board (5).

2. double lithium foil preparation facilities as described in claim 1, it is characterised in that：The upper Rolling roller (1) and isolation board (5) it Between mill speed ratio and the lower Rolling roller (2) and isolation board (5) between mill speed than identical or different.