CN212915374U

CN212915374U - Lithium cell silicon carbon negative electrode material cladding device

Info

Publication number: CN212915374U
Application number: CN202020778284.8U
Authority: CN
Inventors: 罗章; 高瑞娟; 李辉
Original assignee: Luoyang Haorun Info Technology Co ltd
Current assignee: Luoyang Haorun Info Technology Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-04-09
Anticipated expiration: 2030-05-12

Abstract

The utility model relates to a lithium cell silicon carbon negative electrode material cladding device. The technical scheme is as follows: comprises a heating furnace, an electric cabinet, a stirring tank, a feeding pipe, a motor, an exhaust pipe, an exhaust valve, a conductive brush, a conductive ring, a peripheral stirring plate, a spiral stirring plate and an electric heating wire. The utility model discloses a raw materials of two stirring boards of motor drive in to the agitator tank stirs, wherein peripheral stirring board stirs the raw materials of the peripheral part in the agitator tank, and the spiral stirring board is put the stirring at agitator tank central point, can produce ascending promotion thrust to the raw materials with the help of the spiral inclined plane at rotatory in-process, heat and then heat the raw materials at agitator tank center through the electric heat silk to the spiral stirring board simultaneously, thereby can upwards promote the raw materials from the bottom when heating the raw materials, the cooperation of inside and outside two stirring boards has realized the up-and-down motion to the raw materials and the stirring of transverse motion, can make the raw materials obtain abundant homogeneous mixing, avoid the production of sediment and the caking condition.

Description

Lithium cell silicon carbon negative electrode material cladding device

Technical Field

The utility model belongs to lithium cell production facility field relates to a lithium cell silicon carbon negative electrode material cladding device.

Background

The lithium ion battery as the cathode material and the high capacity are the key. At present, most of cathode materials of commercial lithium ion batteries are carbon materials, wherein the use of artificial graphite is one of the mainstream, but the poor compatibility of the artificial graphite and electrolyte and the irreversible decomposition of an organic solvent on a carbon cathode can generate negative effects on the electrode behavior, so that the graphite layer expands and contracts to cause the graphite layer to be peeled off, thereby reducing the cycle efficiency. In order to improve the defects of the artificial graphite, the prior art uses the artificial graphite as a raw material, and carries out surface modification treatment on the artificial graphite, for example, the artificial graphite is coated and modified by a thermal polycondensation method, so as to obtain a negative electrode material with good chemical properties and high charge-discharge efficiency. At present, in the production process of silicon-carbon cathode materials, a second intermediate product obtained by crushing and grading a block subjected to cold isostatic pressing needs to be placed in a solid-phase reactor for coating to obtain a third intermediate product. In order to reduce the production cost, the organic carbon precursor for coating is generally pitch, the traditional coating method is to pour the particle powder obtained from the second intermediate product and pitch solution into a reactor for mixing and stirring, and because the pitch has high viscosity and the temperature of the central part in the reactor is not high, and precipitation and the like occur, the pitch solution poured into the reactor is easy to coagulate and adhere to particles to form a large block, so that the reactor needs to spend a long time to separate the large block to form a third intermediate product which is uniformly stirred.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses a coating device for silicon-carbon cathode materials of lithium batteries, which adopts the technical proposal that the coating device comprises a heating furnace and an electric cabinet and is characterized in that the electric cabinet is fixedly arranged on the side wall of the heating furnace, an agitator tank is arranged in the inner cavity of the heating furnace, a motor is fixedly arranged at the top of the heating furnace, a stirring main shaft is fixedly connected on the rotating shaft of the motor and extends into the inner cavity of the agitator tank from the central position of the top of the agitator tank, a feed pipe and an exhaust pipe are fixedly connected at the top of the agitator tank, the feed pipe and the exhaust pipe are respectively communicated with the inner cavity of the agitator tank, a conducting ring is fixedly connected on the partial circumference of the upper part of the stirring main shaft outside the agitator tank, a conducting brush is arranged in matching with the conducting ring, and is fixedly arranged on the agitator, electrically conductive brush pass through the wire with electric cabinet electric connection, the stirring main shaft is located partial upper portion in the agitator tank inner chamber is the peripheral stirring board of circumference equidistant distribution fixedly connected with, and lower part fixedly connected with spiral stirring board, peripheral stirring board is located spiral stirring board is peripheral and presses close to the inner wall of agitator tank, the heating wire is installed in the embedding on the spiral stirring board, the heating wire with pass through wire electric connection between the conducting ring.

As an optimized scheme of the utility model, the agitator tank has been seted up the discharge gate in the lower extreme and has been installed sealed lid through screw-thread fit.

As an optimized scheme of the utility model, install feeding valve on the filling tube, feeding valve chooses the gate valve for use.

As an optimized proposal of the utility model, the exhaust pipe is provided with an exhaust valve and is connected with an external gas recovery processing device.

As an optimized proposal of the utility model, the spiral stirring plate is made of heat-conducting metal.

The utility model has the advantages that: the utility model discloses a raw materials of two stirring boards of motor drive in to the agitator tank stirs, wherein peripheral stirring board stirs the raw materials of the peripheral part in to the agitator tank, make it have downward and horizontal motion, and the spiral stirring board is put at the agitator tank central point and is extended from the bottom and link up, can produce ascending promotion thrust to the raw materials with the help of the spiral inclined plane at rotatory in-process, heat the spiral stirring board through the heater wire simultaneously and then heat the raw materials at agitator tank center, thereby can upwards promote the raw materials from the bottom when heating the raw materials, peripheral stirring board and spiral stirring board's cooperation has realized the up-and-down motion and the lateral motion's of raw materials stirring, can make the raw materials obtain abundant homogeneous mixing, avoid the production of sediment and the caking condition.

Drawings

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

FIG. 2 is a schematic view of the overall structure of the stirring tank of the present invention;

fig. 3 is a cross-sectional view of the internal structure of the stirring tank of the present invention.

In the figure: 1-heating furnace, 2-electric cabinet, 3-stirring tank, 301-sealing cover, 4-feeding pipe, 401-feeding valve, 5-motor, 501-stirring main shaft, 6-exhaust pipe, 601-exhaust valve, 7-conductive brush, 8-conductive ring, 9-peripheral stirring plate, 10-spiral stirring plate and 11-electric heating wire.

Detailed Description

Example 1

As shown in fig. 1 to 3, the coating device for silicon carbon cathode material of lithium battery of the present invention adopts the technical scheme that the coating device comprises a heating furnace 1 and an electric cabinet 2, and is characterized in that the electric cabinet 2 is fixedly installed on the side wall of the heating furnace 1, an agitator tank 3 is installed in the inner cavity of the heating furnace 1, a motor 5 is fixedly installed on the top of the heating furnace 1, a stirring spindle 501 is fixedly connected to the rotating shaft of the motor 5 and extends into the inner cavity of the agitator tank 3 from the center position of the top of the agitator tank 3, a feeding pipe 4 and an exhaust pipe 6 are fixedly connected to the top of the agitator tank 3, the feeding pipe 4 and the exhaust pipe 6 are respectively communicated with the inner cavity of the agitator tank 3, a conductive ring 8 is fixedly connected to the partial circumference of the upper portion of the stirring spindle 501 outside the agitator tank 3, and a conductive brush 7 is installed in cooperation with the conductive ring, electrically conductive brush 7 fixed mounting be in on the agitator tank 3, electrically conductive brush 7 pass through the wire with 2 electric connection of electric cabinet, stirring main shaft 501 is located partial upper portion in the 3 inner chambers of agitator tank is the peripheral stirring board 9 of circumference equidistant distribution fixedly connected with, and lower part fixedly connected with spiral stirring board 10, peripheral stirring board 9 is located spiral stirring board 10 is peripheral and presses close to the inner wall of agitator tank 3, spiral stirring board 10 is gone up the embedding and is installed heating wire 11, heating wire 11 with pass through wire electric connection between the conducting ring 8.

The discharge gate has been seted up at agitator tank 3 in the lower extreme and has installed sealed lid 301 through the screw-thread fit.

And a charging valve 401 is arranged on the charging pipe 4, and the charging valve 401 selects a gate valve.

The exhaust pipe 6 is provided with an exhaust valve 601 and connected with an external gas recovery processing device.

The spiral stirring plate 10 is made of a heat-conducting metal material.

The utility model discloses a theory of operation: the raw materials are added into the stirring tank 3 through the feeding pipe 4, the operation of the whole device is controlled through the electric cabinet 2, the heating furnace 1 is enabled to heat the whole stirring tank 3, the temperature in the stirring tank 3 is ensured, the stirring main shaft 501 is driven to rotate through the motor 5, so as to drive the peripheral stirring plate 9 and the spiral stirring plate 10 to rotate, the peripheral stirring plate 9 is used for stirring the raw materials of the peripheral part in the stirring tank 3, so that the raw materials move downwards and transversely, the spiral stirring plate 10 rotates at the center of the stirring tank, the raw materials can generate upward lifting thrust in the rotating process by means of the spiral inclined plane, the spiral stirring plate 10 is heated through the heating wire 11, so as to heat the raw materials, the raw materials can be lifted upwards from the bottom while the spiral stirring plate 10 is used for heating the raw materials, the vertical movement and the transverse movement of the raw materials are stirred through the matching of the peripheral stirring plate 9 and the spiral stirring plate 10, the raw materials can be fully and uniformly mixed, the generation of precipitation and caking conditions is avoided, in the process, due to heating, gas generated in the raw materials can be discharged through the exhaust pipe 6 and further processed, and the raw materials after stirring and coating are discharged from the bottom of the stirring tank 3 after the sealing cover 301 is opened.

Components and circuit connections not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, 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 range of those skilled in the art, and modifications or variations without creative efforts are still within the scope of the present invention.

Claims

1. The lithium battery silicon carbon negative electrode material coating device comprises a heating furnace (1) and an electric cabinet (2), and is characterized in that the electric cabinet (2) is fixedly mounted on the side wall of the heating furnace (1), an agitator tank (3) is mounted in the inner cavity of the heating furnace (1), a motor (5) is fixedly mounted at the top of the heating furnace (1), a stirring main shaft (501) is fixedly connected to a rotating shaft of the motor (5) and extends into the inner cavity of the agitator tank (3) from the center position of the top of the agitator tank (3), a feeding pipe (4) and an exhaust pipe (6) are fixedly connected to the top of the agitator tank (3), the feeding pipe (4) and the exhaust pipe (6) are respectively communicated with the inner cavity of the agitator tank (3), a conducting ring (8) is fixedly connected to the upper part of the circumference outside the agitator tank (3) on the upper part of the stirring main shaft (501), with electrically conductive brush (7) is installed in conducting ring (8) cooperation, electrically conductive brush (7) fixed mounting be in on agitator tank (3), electrically conductive brush (7) pass through the wire with electric cabinet (2) electric connection, stirring main shaft (501) are located part upper portion in agitator tank (3) inner chamber is the peripheral stirring board (9) of circumference equidistant distribution fixedly connected with, and lower part fixedly connected with spiral stirring board (10), peripheral stirring board (9) are located spiral stirring board (10) periphery and press close to the inner wall of agitator tank (3), embedding is installed heating wire (11) on spiral stirring board (10), heating wire (11) with pass through wire electric connection between conducting ring (8).

2. The device for coating silicon-carbon negative electrode material of lithium battery as claimed in claim 1, wherein: the lower end of the stirring tank (3) is provided with a discharge hole and a sealing cover (301) is installed in a threaded fit mode.

3. The device for coating silicon-carbon negative electrode material of lithium battery as claimed in claim 1, wherein: and a charging valve (401) is arranged on the charging pipe (4), and a gate valve is selected for the charging valve (401).

4. The device for coating silicon-carbon negative electrode material of lithium battery as claimed in claim 1, wherein: the exhaust pipe (6) is provided with an exhaust valve (601) and is connected with external gas recovery processing equipment.

5. The device for coating silicon-carbon negative electrode material of lithium battery as claimed in claim 1, wherein: the spiral stirring plate (10) is made of heat-conducting metal materials.