CN218385380U

CN218385380U - Dry recovery device for leftover materials of lithium/sodium ion battery pole pieces

Info

Publication number: CN218385380U
Application number: CN202222840203.4U
Authority: CN
Inventors: 姚永刚; 黄云辉; 张豪
Original assignee: Wuhan Huacai Lvneng Technology Co ltd
Current assignee: Huazhong University of Science and Technology
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-01-24
Anticipated expiration: 2032-10-27

Abstract

The utility model belongs to the technical field of the energy material, concretely relates to dry process recovery unit of lithium/sodium ion battery pole piece leftover bits, the device comprises a device body, device body one side is provided with unreels roller bearing, first support roller bearing, goes up heat source generator, second support roller bearing, goes up scraper, third support roller bearing, heat source generator, fourth support roller bearing, scraper, rolling power roller bearing and receipts feed bin down. The utility model discloses under the prerequisite of not destroying the active material structure, realize the flash separation and the recovery of leftover bits. The utility model has the advantages of efficient, with low costs, simple process, simple operation, no waste liquid discharge, especially be fit for the large-scale volume production, have fine application prospect.

Description

Dry recovery device for leftover materials of lithium/sodium ion battery pole pieces

Technical Field

The utility model belongs to the technical field of the energy material, concretely relates to dry process recovery unit of lithium/sodium ion battery pole piece leftover bits.

Background

With the proposal of the 'double carbon' target in 2020, china remarkably accelerates the transformation of an energy structure and gradually transits from the traditional fossil energy serving as a main energy source to clean energy sources mainly comprising water, electricity, wind energy, solar energy and the like. Lithium ion batteries are expected to occupy 70% of the new energy market by 2025. The leftover materials of the pole pieces are used as wastes in the production process of the positive pole piece and the negative pole piece of the lithium ion battery, and the output of the leftover materials of the pole pieces can be rapidly increased along with the output of the lithium ion battery on the same scale. However, the scrap has not been assembled into a battery, and the active material still has excellent electrochemical properties, wherein the content of the active material exceeds 80%. Therefore, the recycling of the leftover materials has important positive significance on the problems of global resource shortage and energy crisis.

At present, the method for recovering the waste lithium ion battery by the industry boundary mainly comprises the following steps: pyrometallurgy and hydrometallurgy. Pyrometallurgy uses high-temperature smelting, and the main recovered product is metal alloy with a large amount of carbon dioxide emission. In the hydrometallurgy, a pole piece is dissolved by adopting high-concentration acid and alkali, inorganic active substances are converted into ions, and finally, the ions are dried to obtain a metal salt precursor. For the waste lithium ion battery pole pieces, the active materials and even the current collector metal foils are structurally damaged to a certain degree, so that the two methods have better applicability. The active substances in the lithium ion battery leftover materials have intact structures and functions, if the two methods are adopted for treatment, the material structures are completely destroyed, and the obtained precursor still needs to be re-synthesized into an available anode material or a current collector metal foil in the recycling process, so that the recovery process is artificially prolonged, more energy is consumed, the economic cost of recovery is increased, and the environmental pressure is increased.

Some researches show that the direct recovery of the positive and negative active materials of the waste lithium ion battery can be realized, for example: electrolytic process, liquid phase ultrasonic process, traditional low temperature calcination process, molten salt process, etc. However, the method has the problems of large waste liquid discharge, large energy consumption, difficult scale production, difficult compatibility with the existing battery production process and the like.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned weak point among the prior art, the utility model provides a dry process recovery unit of lithium/sodium ion battery pole piece leftover bits, its aim at does not destroy under the prerequisite of active material structure, realizes the flash separation and the recovery of leftover bits. The utility model has the advantages of efficient, with low costs, simple process, simple operation, no waste liquid discharge, especially be fit for the large-scale volume production, have fine application prospect.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a dry process recovery unit of lithium/sodium ion battery pole piece leftover bits, includes the device body, device body one side is provided with unreels roller bearing, first support roller bearing, goes up heat source generator, second support roller bearing, goes up the scraper, third support roller bearing, heat source generator, fourth support roller bearing, scraper, rolling power roller bearing and receipts feed bin down.

Preferably, the unwinding roller is positioned at the upper right corner of one side of the device body, the upper scraper is positioned at the middle position of the left part of one side of the device body, and a first supporting roller and a second supporting roller are sequentially arranged between the unwinding roller and the upper scraper; an upper heat source generator is arranged between the first supporting rolling shaft and the second supporting rolling shaft.

Preferably, the lower scraper is positioned at the lower right corner of one side of the device body, and a third supporting roller and a fourth supporting roller are sequentially arranged between the upper scraper and the lower scraper; and a lower heat source generator is arranged between the third supporting rolling shaft and the fourth supporting rolling shaft.

Preferably, the upper blade edge direction faces to the left, and the lower blade edge direction faces to the right.

Preferably, the rolling power roller is positioned in the middle of the bottom of one side of the device body and is connected with a motor rotating shaft in the device body.

Preferably, the collecting bin is positioned at the bottom of the winding power roller.

Preferably, the upper heat source generator and the lower heat source generator are electric heaters.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model belongs to a dry recovery device, and has no waste liquid discharge; short recovery flow, simple operation, short heat treatment time per unit area and low energy consumption.

(2) The utility model discloses a rapid heating handles for organic binder carbonization became invalid, has realized active material and the direct, the high-efficient separation of mass flow body foil, has avoided active material to be polluted by mass flow body metal element.

(3) The utility model discloses when retrieving active material, realized the recovery of complete mass flow body metal forming.

(4) The processing mode adopted by the utility model is compatible with the existing battery pole piece production process, is very suitable for large-scale mass production, can separate and recover the leftover materials in situ on line after the leftover materials are cut, and can reduce the occupied space of the leftover materials in a warehouse; the rolled leftover materials can also be unreeled and recycled.

Drawings

FIG. 1: the utility model discloses a schematic diagram of a dry method recovery device for leftover materials of lithium/sodium ion battery pole pieces;

FIG. 2: the utility model relates to a dry process recovery unit elevation of lithium/sodium ion battery pole piece leftover bits.

The reference numbers are as follows: 100. a device body; 200. unwinding a roller; 310. a first support roller; 410. an upper heat source generator; 320. a second support roller; 510. a scraper is arranged; 330. a third supporting roller; 420. a lower heat source generator; 340. a fourth supporting roller; 520. a lower scraper; 600. a power rolling shaft is wound; 700. a material receiving bin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-2, a dry recycling device for leftover materials of lithium/sodium ion battery pole pieces comprises a device body 100, wherein one side of the device body 100 is provided with an unwinding roller 200, a first supporting roller 310, an upper heat source generator 410, a second supporting roller 320, an upper scraper 510, a third supporting roller 330, a lower heat source generator 420, a fourth supporting roller 340, a lower scraper 520, a winding power roller 600 and a material receiving bin 700.

In this embodiment, the unwinding roller 200 is located at the upper right corner of one side of the apparatus body 100, the upper scraper 510 is located at the middle position of the left part of one side of the apparatus body 100, and the first supporting roller 310 and the second supporting roller 320 are sequentially arranged between the unwinding roller 200 and the upper scraper 510; an upper heat source generator 410 is disposed between the first supporting roller 310 and the second supporting roller 320.

In this embodiment, the lower scraper 520 is located at the lower right corner of one side of the apparatus body 100, and the third supporting roller 330 and the fourth supporting roller 340 are sequentially arranged between the upper scraper 510 and the lower scraper 520; a lower heat source generator 420 is disposed between the third supporting roller 330 and the fourth supporting roller 340.

In this embodiment, the upper blade 510 has a blade oriented to the left and the lower blade 520 has a blade oriented to the right.

In this embodiment, the rolling power roller 600 is located in the middle of the bottom of one side of the apparatus body 100, and is connected to a rotating shaft of a motor in the apparatus body 100; the rotating speed of the winding power roller is controlled by a motor.

In this embodiment, the collecting bin 700 is located at the bottom of the power roller 600.

In the present embodiment, the upper heat source generator 410 and the lower heat source generator 420 are electric heaters.

In this embodiment, in the atmosphere protected by argon atmosphere at normal pressure, the motor drives the winding power roller 600 to wind at a speed of 0.01 m/s, and the unwinding roller 200 is driven to unwind at a speed of 0.01 m/s by acting on the corner material roll; supported by the first supporting roller 310 and the second supporting roller 320, the edge material roll passes below the upper heat source generator 320 at the speed of 0.01 m/s and the temperature of 1000 ℃, so that the organic binder in the active layer on one side of the edge material roll is carbonized and failed; then, bending the processed corner material roll by more than 90 degrees by using a scraper 510, so that the corner material roll is tightened and slides across the edge of the scraper 510, and graphite on one side of the corner material roll is separated from copper foil; then, the leftover material roll passes through the lower part of a lower heat source generator 340 at 1000 ℃ at the speed of 0.01 m/s by being supported by a third supporting roller 330 and a fourth supporting roller 340, so that the organic binder in the active layer on the other side of the leftover material roll is carbonized and failed; then the lower scraper 520 bends the processed copper foil pole piece for more than 90 degrees, so that the edge material roll is tightened and slides across the edge of the lower scraper 520, and the graphite and the copper foil on the other side of the edge material roll are separated; the graphite after complete separation falls into a collecting bin 700 for recovery, and the separated copper foil is rolled into a roll by a rolling power roller 600 for recovery.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a dry process recovery unit of lithium/sodium ion battery pole piece leftover bits, its characterized in that includes device body (100), device body (100) one side is provided with unreels roller (200), first supporting roller (310), goes up heat source generator (410), second supporting roller (320), goes up scraper (510), third supporting roller (330), heat source generator (420) down, fourth supporting roller (340), scraper (520) down, rolling power roller (600) and receipts feed bin (700).

2. The dry-method recycling device for leftover materials of pole pieces of lithium/sodium ion batteries according to claim 1, wherein the unwinding roller (200) is located at the upper right corner of one side of the device body (100), the upper scraper (510) is located at the middle position of the left part of one side of the device body (100), and a first supporting roller (310) and a second supporting roller (320) are sequentially arranged between the unwinding roller (200) and the upper scraper (510); an upper heat source generator (410) is arranged between the first supporting roller (310) and the second supporting roller (320).

3. The dry recycling device for the leftover materials of the lithium/sodium-ion battery pole pieces, according to claim 1, is characterized in that the lower scraper (520) is positioned at the lower right corner of one side of the device body (100), and a third supporting roller (330) and a fourth supporting roller (340) are sequentially arranged between the upper scraper (510) and the lower scraper (520); a lower heat source generator (420) is arranged between the third supporting roller (330) and the fourth supporting roller (340).

4. The dry recycling device for leftover bits and pieces of lithium/sodium-ion batteries of claim 1, wherein the edge direction of said upper scraper (510) is towards left, and the edge direction of said lower scraper (520) is towards right.

5. The dry recycling device for leftover materials of pole pieces of lithium/sodium ion batteries according to claim 1, wherein the rolling power roller (600) is located in the middle of the bottom of one side of the device body (100) and is connected with a rotating shaft of a motor in the device body (100).

6. The dry recycling device for leftover materials of pole pieces of lithium/sodium ion batteries according to claim 1, wherein the collecting bin (700) is located at the bottom of the winding power roller (600).

7. The dry recycling device for leftover materials of pole pieces of lithium/sodium ion batteries according to claim 1, wherein the upper heat source generator (410) and the lower heat source generator (420) are electric heaters.