CN114678521B

CN114678521B - Method for improving specific surface area of lithium ion battery anode material precursor

Info

Publication number: CN114678521B
Application number: CN202210434855.XA
Authority: CN
Inventors: 闻昱; 高浩善; 姚绍和; 冯文振; 刘波; 鲍雷
Original assignee: Jiangsu Jinfengyuan New Energy Co ltd
Current assignee: Jiangsu Jinfengyuan New Energy Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2023-03-24
Anticipated expiration: 2042-04-24
Also published as: CN114678521A

Abstract

The invention provides a method for improving the specific surface area of a precursor of a lithium ion battery anode material, which comprises the following steps: preparing materials, namely mixing the precursor raw materials to obtain a mixed solution, and reacting the mixed solution to obtain slurry; coating; rolling, namely rolling the pole piece into a thin pole piece by using a rolling mill; slitting; winding; baking and injecting liquid to obtain the electrode material of the lithium ion battery. In the process of mixing the solution, the temperature sensor is used for controlling the temperature of the mixed solution, so that the production efficiency of the precursor material in the preparation process is effectively improved; meanwhile, the accurate temperature control ensures that the slurry is in a stable working environment for reaction, so that the condition that the performance of the material is unstable due to the temperature is reduced, and the specific surface area of the precursor of the electrode material is optimized by optimizing the preparation process of the precursor material; the physical and chemical properties of the electrode material prepared from the precursor material are optimized, and the chemical properties of the lithium battery are further optimized.

Description

Method for improving specific surface area of lithium ion battery anode material precursor

Technical Field

The invention relates to the technical field of lithium ion batteries, in particular to a method for improving the specific surface area of a precursor of a positive electrode material of a lithium ion battery.

Background

At present, a lithium ion battery is taken as an indispensable daily electronic equipment accessory, and in the use process of the battery, a positive electrode material is taken as one of 4 large core materials of the battery, so that the comprehensive performance of the battery is restricted; in the actual process of preparing the anode material, the specific surface area and the morphology of the precursor directly determine the specific surface area and the morphology of the ternary anode; furthermore, the element proportion of the positive electrode can also influence each other along with the surface area and the appearance of the precursor, so that the physical and chemical properties of the positive electrode, such as particle size, appearance, element proportion, impurity content and the like, influence the core electrochemical properties of the lithium battery, such as energy density, rate capability, cycle life and the like;

therefore, a method capable of increasing the specific surface area of the precursor of the positive electrode material of the lithium ion battery is lacked, so that the physical and chemical properties of the positive electrode material can be improved by increasing the specific surface area of the precursor, and the chemical properties of the lithium ion battery can be further improved.

Disclosure of Invention

The invention provides a method capable of improving the specific surface area of a precursor of a lithium ion battery anode material, which is used for improving the physical and chemical properties of an electrode material prepared from the precursor material by optimizing the preparation process of the precursor material and further improving the chemical properties of a lithium battery.

The invention provides a method for improving the specific surface area of a precursor of a lithium ion battery anode material, which comprises the following steps:

preparing materials, namely mixing the precursor raw materials to obtain a mixed solution, and reacting the mixed solution to obtain slurry; preparing positive electrode slurry from the slurry;

the mixed solution is reacted in a reaction kettle and prepared to obtain precursor slurry, a temperature sensor is arranged in the reaction kettle and transmits temperature information in the reaction kettle to a controller, the controller adjusts the output temperature of a temperature control device according to the temperature information, and the temperature control device is used for heating or cooling the temperature in the reaction kettle; the precursor raw material is a precursor containing nickel and manganese elements;

further comprising: coating, namely coating the prepared anode slurry on a current collector, and heating the current collector to obtain a pole piece with the slurry;

rolling, namely rolling the pole piece into a thin pole piece by using a rolling mill;

cutting, namely cutting the thin pole piece and removing burrs of a cutting surface of the thin pole piece;

winding, namely winding the slit thin pole piece to obtain an integrated pole piece,

baking and injecting liquid, drying the integrated pole piece, injecting electrolyte, and forming the electrode material of the lithium ion battery.

Preferably, the method further comprises the following steps:

standing, namely standing the integrated pole piece injected with the electrolyte, and enabling the electrolyte to permeate into the integrated pole piece;

formation, namely charging the integrated pole piece with the electrolyte;

aging, namely aging the charged integrated pole piece in a high-temperature aging chamber, and removing defective products;

grading the capacity, classifying the reserved finished product integrated pole pieces into batteries in a charging and discharging cabinet,

sorting, namely testing the classified battery electrode materials, and sorting the battery electrode materials according to the voltage internal resistance; and subpackaging and warehousing the sorted electrode materials.

Preferably, the method further comprises the steps of slitting the thin pole piece by using a slitting machine, and removing burrs of the slit thin pole piece by using a deburring device;

and, further comprising: if the temperature of the reaction kettle is lower than the preset temperature, the controller sends a temperature-raising instruction, and the temperature control device raises the temperature of the reaction kettle according to the temperature-raising instruction; meanwhile, when the current collector is heated, the heating device is used for conveying a heat source to the reaction kettle together with the temperature control device; the heat source is gas or liquid.

Wherein configuring the slurry into the positive electrode slurry further comprises: drying the slurry to obtain a solid powder material; and synthesizing the solid powder material into a positive electrode material, and preparing positive electrode slurry by using the positive electrode material.

Preferably, the method further comprises the following steps: injecting liquid into the integrated pole piece by using preparation equipment; the method comprises the following steps:

sequentially placing the integrated pole piece into a first station or a second station of preparation equipment;

starting a liquid injection machine to inject electrolyte into the first station or the second station; and recording the injection time of the electrolyte;

starting a sorting mechanism of the preparation equipment according to preset parameters to take out the integrated pole pieces meeting the liquid injection time, and moving the integrated pole pieces into an aging station to carry out temperature rise aging on the integrated pole pieces;

after the aging is finished, the visual inspection mechanism is started, the aged defective products are removed by the sorting mechanism, the good products are reserved, and the good products are sent to the next station.

The first station or the second station is a working station of a first liquid injection device or a second liquid injection device respectively.

Preferably, the preparation apparatus includes: the frame body is provided with a plurality of seal plates;

a plurality of support legs and a plurality of pulleys are arranged below the frame body at intervals, and each support leg is an electric support leg and is used for erecting the frame body on a preset station to prepare an electrode material;

a second cross bar and a first cross bar are arranged in the frame body at intervals from bottom to top, a first liquid injection device and a second liquid injection device are erected on the two second cross bars,

the first cross rod is used for erecting an aging mechanism, a second translation mechanism is arranged on the upper top surface of the frame body, and a sorting mechanism is erected on the second translation mechanism;

the aging mechanism is arranged on the first cross rod through a first translation mechanism, and is erected between the second translation mechanism and the first liquid injection device/the second liquid injection device.

Preferably, the first injection device/the second injection device comprises: the integrated pole piece feeding tray comprises a first tray, wherein two groups of material groove groups are arranged on the first tray at intervals, each group of material groove group comprises a plurality of material grooves which are arranged at intervals, an integrated pole piece is placed in each material groove, a overflowing groove is arranged on the inner wall of one end, close to a groove opening, of each material groove, a plurality of reinforcing ribs are arranged between the outer side wall of each material groove and the upper surface of the first tray, and a liquid guide channel is arranged between every two adjacent overflowing grooves;

liquid outlets are arranged between the material trough groups, the other end of each liquid outlet is connected with a first material guiding pipe, the other end of each first material guiding pipe is connected with a second material guiding pipe, and the second material guiding pipe is connected with a material box;

the lower bottom surface of the first tray is erected on a fifth transverse plate, a sixth transverse plate is arranged below the fifth transverse plate, a second vertical plate is arranged below the sixth transverse plate at intervals, slide rail assemblies are respectively arranged on the opposite surfaces of the second vertical plate, a fourth transverse plate is arranged between the two slide rail assemblies, one side surface of the fourth transverse plate is connected with a third vertical plate, the other end of the third vertical plate is connected with the fifth transverse plate, and a handle is arranged on one side, away from the fifth transverse plate, of the third vertical plate;

a check block is arranged on the other side surface of the fourth transverse plate, a detection rod is arranged on the upper surface of the check block, and the detection rod is used for detecting and limiting the moving position or the moving range of the fifth transverse plate;

first guide rods are arranged on the lower surface of the fourth transverse plate at intervals, a first screw rod is arranged between the first guide rods, one end of the first screw rod is in threaded connection with a second transverse plate, and the second transverse plate is erected on the second transverse rod;

two second guide sleeves are arranged on the second transverse plate at intervals, correspond to the two first guide rods one to one respectively, and are used for guiding the movement directions of the two first guide rods;

a first guide sleeve is arranged between the second guide sleeves, the first guide sleeve is in threaded connection with a first screw rod, the other end of the first screw rod is connected with a driving assembly, the first guide rod and the driving assembly are respectively erected on a third transverse plate, drag chain boxes are symmetrically arranged between the third transverse plate and the second transverse plate and used for arranging drag chains, one end of each drag chain is connected with the third transverse plate, and the other end of each drag chain is connected with the second vertical plate;

still be equipped with the inspection hole on the second diaphragm, the upper surface and the lower surface of second diaphragm are equipped with first L board respectively, one side that first L board is close to inspection hole inner wall is equipped with the sensor respectively, the fourth diaphragm is close to one side of inspection hole is equipped with the test strip, the test strip with the sensor mutually supports, and is right the reciprocal operation of fourth diaphragm highly monitors.

Preferably, the first cross bars are oppositely arranged on the inner walls of the two sides of the frame body, and the heights of the two first cross bars are different; one of the first cross bars is provided with a first translation mechanism, the lower surface of the other cross bar is provided with a first rail, the upper surface of the first translation mechanism and the lower surface of the first rail are in sliding connection with the lower surface of one side and the upper surface of one side of the aging mechanism, and the aging mechanism is used for reciprocating along with the first translation mechanism and the first rail;

the aging mechanism includes: one side of the seventh transverse plate, which is close to the first rail, is hung on the slide rail of the first rail through a slide block, one side of the seventh transverse plate, which is close to the first translation mechanism, is arranged on the upper surface of the second rail plate of the first translation mechanism in a sliding manner through a second slide block,

first air pump assemblies are symmetrically arranged on two sides of the seventh transverse plate, a driving rod of each first air pump assembly is connected with a push plate, one surface, far away from the driving rod, of each push plate is connected with a U-shaped clamping rod of a U-shaped structure, U-shaped opening ends of the U-shaped clamping rods are oppositely arranged, bearing plates for placing objects are arranged in U-shaped notches of the U-shaped clamping rods at intervals, and first trays are placed on the bearing plates;

guide plates are respectively arranged at two ends of the U-shaped clamping rod, and one ends of the guide plates, which are far away from the U-shaped clamping rod, are used for being attached to the inner wall of the through hole formed in the seventh transverse plate; the first air pump assembly is provided with a plurality of air pump valves, and the air pump valves are used for matching with the first air pump assembly to push the push plate; and a second motor is arranged on one side of the first translation mechanism and used for driving a second sliding block of the first translation mechanism to reciprocate.

The sorting mechanism is arranged on the inner top surface of the rack body through a plurality of second translation mechanisms, and the second translation mechanisms are arranged on the inner top of the rack body through a plurality of third L-shaped plate frames;

the letter sorting mechanism includes: one end of the fourth L board is connected with a second translation mechanism, the other end of the fourth L board is connected with a second air pump assembly, the driving end of the second air pump assembly is connected with a connecting table, a push rod is arranged below the connecting table, the lower bottom end of the push rod is connected with a U-shaped frame of a U-shaped structure, a U-shaped opening of the U-shaped frame is arranged downwards, a U-shaped opening end of the U-shaped frame is connected with a connecting plate, a plurality of mounting notches are formed in the connecting plate at intervals, a plurality of air rods are arranged in each mounting notch at intervals, the upper ends of the air rods are connected with the output end of a negative pressure device, suction nozzles are arranged at the lower ends of the air rods one by one, and are used for sorting defective products or grabbing and shifting the first tray;

the upper top surface of the second air pump assembly is connected with the lower bottom surface of the fourth L plate through a second mounting plate, the side wall of the second air pump assembly is connected with a second translation mechanism through a third mounting plate, and the second translation mechanism reciprocates above the aging station.

Preferably, the first/second translation mechanism includes: the driving end of the driving part is connected with a second screw, the other end of the second screw is rotatably connected to one end, far away from the driving part, of a second track plate or a third track plate of the U-shaped structure, a first sliding block is connected to the second screw in a threaded manner, one end, close to an opening of the U-shaped structure of the second track plate or the third track plate, of the first sliding block extends outwards and is provided with a second sliding block, and the second sliding block is used for being connected with a seventh transverse plate or a third mounting plate;

a guard plate is further arranged at the U-shaped opening end of the second track plate or the third track plate, a plurality of sensors are arranged on one side of the second track plate or the third track plate at intervals, and a detection strip matched with the sensors is arranged on one side, close to the sensors, of the second sliding block;

the first sliding block and the second sliding block form a U-shaped structure, and the guard plate is positioned in the U-shaped structure formed by the first sliding block and the second sliding block; a third sliding rail is further arranged on the U-shaped inner bottom surface of the second track plate or the third track plate and is used for being matched with the first sliding block and enabling the first sliding block to reciprocate in the second track plate or the third track plate; the first motor, the second motor and the third motor are all connected with the controller through wires.

The driving part includes: the driving end of the second motor is connected with the first translation mechanism, the driving end of the second motor is used for being connected with the second translation mechanism, the output end of the second motor is also connected with a driving component,

the drive assembly includes: the driving wheel is connected with the output end of the second motor or the first motor, one end of the second screw rod or the first screw rod of the second translation mechanism is connected with the driven wheel, and the driving wheel is connected with the driven wheel through a belt.

One surfaces, far away from the second liquid injection device, of the first liquid injection device and one surfaces, far away from the first liquid injection device, of the second liquid injection device are respectively provided with a first vertical plate; the driving wheel connected with the first motor is arranged on the lower bottom surface of the third transverse plate through a first mounting plate frame;

one side, close to the first rail, of the seventh transverse plate is further arranged on the inner wall of the frame body through a second L-shaped plate frame, second guide rods are symmetrically arranged on two sides of a driving rod of the first air pump assembly, and the second guide rods are used for controlling the smoothness of the push plate; and the driving device connected with the third motor is erected at one end of the third track plate through the motor shell.

The working principle and the beneficial effects of the invention are as follows:

the invention provides a method for improving the specific surface area of a precursor of a lithium ion battery anode material, which comprises the following steps: preparing materials, namely mixing the precursor raw materials to obtain a mixed solution, and reacting the mixed solution to obtain slurry; preparing positive electrode slurry from the slurry; the mixed solution is reacted in a reaction kettle and prepared to obtain precursor slurry, a temperature sensor is arranged in the reaction kettle and transmits temperature information in the reaction kettle to a controller, the controller adjusts the output temperature of a temperature control device according to the temperature information, and the temperature control device is used for heating or cooling the temperature in the reaction kettle; the precursor raw material is a precursor containing nickel and manganese elements;

further comprising: coating, namely coating the prepared anode slurry on a current collector, and heating the current collector to obtain a pole piece with the slurry; rolling, namely rolling the pole piece into a thin pole piece by using a rolling mill; cutting, namely cutting the thin pole piece and removing burrs of a cutting surface of the thin pole piece; and winding, namely winding the slit thin pole piece to obtain an integrated pole piece, baking and injecting liquid, drying the integrated pole piece to remove moisture, and then injecting electrolyte to form the electrode material of the lithium ion battery.

According to the invention, during the process of mixing the solution, the temperature sensor is utilized to control the temperature of the mixed solution, and when the temperature is too high or too low during the reaction process, the temperature control device is adjusted, so that the working temperature in the reaction tank is always within the preset temperature range, and the production efficiency of the precursor material during the preparation process is effectively improved; meanwhile, the accurate temperature control ensures that the slurry is reacted in a stable working environment, so that the condition that the performance of the material is unstable due to the temperature is reduced, and the specific surface area of the precursor of the electrode material is optimized by optimizing the preparation process of the precursor material; the physical and chemical properties of the electrode material prepared from the precursor material are optimized, and the chemical properties of the lithium battery are further optimized.

The working temperature of the reaction kettle is controlled in real time through an accurate temperature control technology, so that the reaction tank can produce and prepare precursor materials with low energy consumption and high work efficiency in the working process, and the electrode materials are further prepared according to the precursor materials obtained through accurate temperature control, so that the prepared electrode materials can have better physical and chemical properties. Wherein, the precursor raw material is prepared by taking nickel salt, cobalt salt and manganese salt as raw materials.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic process flow diagram of the present invention;

FIG. 2 is a schematic view of the structure of the manufacturing apparatus of the present invention;

FIG. 3 is a schematic view of the internal structure of the production apparatus of the present invention;

FIG. 4 is a schematic structural view of the first/second filling device of the present invention;

FIG. 5 is a schematic perspective view of the first/second filling device of the present invention;

FIG. 6 is a schematic perspective view of the first/second injection device of the present invention;

FIG. 7 is a schematic view of the first and second guide sleeves of the present invention;

FIG. 8 is a schematic view of the aging mechanism connection structure of the present invention;

FIG. 9 is a schematic perspective view of the aging mechanism of the present invention;

FIG. 10 is a schematic structural diagram of a first translation mechanism according to the present invention;

FIG. 11 is a schematic view of the connection structure of the first air pump assembly of the present invention;

fig. 12 is a schematic view of a connecting structure of the second translation mechanism and the sorting mechanism of the present invention;

FIG. 13 is a schematic view of the connection structure of the second translation mechanism and the third L-plate of the present invention;

FIG. 14 is a schematic view of the sorting mechanism of the present invention;

wherein, 1-frame body, 2-closing plate, 3-supporting leg, 4-pulley, 5-first liquid injection device, 6-second liquid injection device, 7-first translation mechanism, 8-sorting mechanism, 9-aging mechanism, 10-second translation mechanism, 11-first cross bar, 13-first vertical plate, 14-second cross bar,

15-a second transverse plate, 16-a first tray, 17-a trough, 18-a liquid guide channel, 19-a liquid overflow trough, 20-a reinforcing rib, 21-a first guide rod, 22-a second guide pipe, 23-a third transverse plate, 24-a first screw, 25-a zipper box, 26-a first motor, 27-a lead, 28-a driven wheel, 29-a belt, 30-a driving wheel, 31-a first mounting plate, 32-a first guide pipe, 33-a first L plate, 34-a sensor, 35-a second vertical plate, 36-a fourth transverse plate, 37-a detection strip, 38-a fifth transverse plate, 39-a detection hole, 40-a first guide sleeve, 41-a second guide sleeve, 42-a sixth transverse plate, 43-a slide rail assembly, 44-a stop block, 45-a detection rod, 46-a third vertical plate, 47-a handle,

48-a first track, 49-a seventh transverse plate, 50-a second track plate, 51-a second L plate, 52-a U-shaped clamping rod, 53-a through hole, 54-a guide plate, 55-an air pump valve, 56-a first air pump assembly, 57-a push plate, 58-a bearing plate, 59-a second guide rod,

61-a second motor, 62-a second screw, 63-a first slide block, 64-a second slide block, 65-a third slide rail,

66-a third motor, 67-a motor casing, 68-a guard plate, 69-a third L plate, 70-a third track plate,

71-a fourth L board, 72-a second air pump assembly, 73-a connecting table, 74-a push rod, 75-a U-shaped frame, 76-an air rod, 77-a connecting board, 78-a suction nozzle, 79-a second mounting board and 80-a mounting notch.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

According to fig. 1 to 14, an embodiment of the present invention provides a method for increasing a specific surface area of a precursor of a positive electrode material of a lithium ion battery, including the following steps: preparing materials, namely mixing the precursor raw materials to obtain a mixed solution, and reacting the mixed solution to obtain slurry; preparing positive electrode slurry from the slurry; the mixed solution is reacted in a reaction kettle to prepare precursor slurry, a temperature sensor is arranged in the reaction kettle and transmits temperature information in the reaction kettle to a controller, the controller adjusts the output temperature of a temperature control device according to the temperature information, and the temperature control device is used for heating or cooling the temperature in the reaction kettle; the precursor raw material is a precursor containing nickel and manganese elements;

further comprising: coating, namely coating the prepared positive electrode slurry on a current collector, and heating the current collector to obtain a pole piece with the slurry; rolling, namely rolling the pole piece into a thin pole piece by using a rolling mill; cutting, namely cutting the thin pole piece and removing burrs of a cutting surface of the thin pole piece; and winding, namely winding the slit thin pole piece to obtain an integrated pole piece, baking and injecting liquid, drying the integrated pole piece to remove moisture, and then injecting electrolyte to form the electrode material of the lithium ion battery.

According to the invention, during the preparation process of the mixed solution, the temperature sensor is used for controlling the temperature of the mixed solution, and when the temperature is too high or too low during the reaction process, the temperature control device is adjusted, so that the working temperature in the reaction tank is always within the preset temperature range, and the production efficiency of the precursor material during the preparation process is effectively improved; meanwhile, the accurate temperature control ensures that the slurry is reacted in a stable working environment, so that the condition that the performance of the material is unstable due to the temperature is reduced, and the specific surface area of the precursor of the electrode material is optimized by optimizing the preparation process of the precursor material; the physical and chemical properties of the electrode material prepared from the precursor material are optimized, and the chemical properties of the lithium battery are further optimized.

According to the invention, the electrode material is cut, and burrs of the section material are fully removed in the cutting process, so that the smoothness of the cut surface of the thin pole piece is effectively improved, the production precision of raw materials is improved, and the improvement of the production precision is convenient for the high yield of the electrode material; the specific surface area of the precursor of the anode material is optimized due to the change of the production process, so that the physical and chemical properties of the material or the electrochemical property of the battery in the use process are effectively improved; meanwhile, the production process of the electrode material is optimized, and the chemical properties (such as charge and discharge and capacitance properties) of the battery are optimized to different degrees when the electrode material is prepared into an electrode of a lithium ion battery; the service life and the use stability of the battery are greatly improved, the situation that the battery suddenly fails in the actual use process is reduced, and the situation that the instantaneous current is too large in the use process can also be reduced.

Further preferably, the method further comprises the following steps:

formation, namely charging the integrated pole piece with the electrolyte;

grading the capacity, classifying the reserved finished integrated pole pieces in a charging and discharging cabinet,

Further preferred still includes, utilizes the cutting machine to cut thin pole piece to utilize burring device to carry out burr to the thin pole piece after cutting and reject and, still include: if the temperature of the reaction kettle is lower than the preset temperature, the controller sends a temperature-raising instruction, and the temperature control device raises the temperature of the reaction kettle according to the temperature-raising instruction; meanwhile, when the current collector is heated, the heating device of the current collector is used for conveying a heat source to the reaction kettle together with the temperature control device; the heat source is gas or liquid.

Wherein the step of preparing the positive electrode slurry from the slurry further comprises: drying the slurry to obtain a solid powder material; and synthesizing the solid powder material into a positive electrode material, and preparing positive electrode slurry by using the positive electrode material.

The invention improves the physical and chemical properties of the anode material by improving the specific surface area of the precursor, and further improves the chemical properties of the lithium battery; the integrated pole piece after cutting off burrs is divided into two parts to permeate electrolyte, the integrated pole piece is further charged and formed, then aging and capacity grading are carried out, the production processes are compact and connected, the purposes of rapid production and continuous production can be achieved, the splitting machine and the deburring device are both the prior art, and repeated description is omitted here.

In this embodiment, when the current collector is heated, the temperature in the reaction kettle can be raised together by combining the temperature control device according to the temperature raising instruction of the controller, so that the temperature raising efficiency is improved, and the production efficiency is further improved.

According to fig. 1-14, in one embodiment, the integrated pole piece is injected with liquid by using a preparation device; the method comprises the following steps:

starting a sorting mechanism 8 of the preparation equipment according to preset parameters to take out the integrated pole pieces meeting the liquid injection time, and moving the integrated pole pieces into an aging station to carry out temperature rise aging on the integrated pole pieces;

after the aging is finished, the visual inspection mechanism is started, the aged defective products are removed by the sorting mechanism 8, the good products are reserved, and the good products are sent to the next station.

The first station or the second station is a working station of the first liquid injection device 5 or the second liquid injection device 6 respectively.

Further preferably, the preparation apparatus includes: the frame body 1 is provided with a plurality of seal plates 2;

a plurality of supporting legs 3 and a plurality of pulleys 4 are arranged below the frame body 1 at intervals, and each supporting leg 3 is an electric supporting leg 3 and is used for erecting the frame body 1 on a preset station to prepare an electrode material;

a second cross bar 14 and a first cross bar 11 are arranged in the frame body 1 at intervals from bottom to top, a first liquid injection device 5 and a second liquid injection device 6 are erected on the two second cross bars 14,

the first cross rod 11 is used for erecting an aging mechanism 9, a second translation mechanism 10 is arranged on the upper top surface of the frame body 1, and a sorting mechanism 8 is erected on the second translation mechanism 10;

the aging mechanism 9 is erected on a first cross bar 11 through a first translation mechanism 7, and is erected between the second translation mechanism 10 and the first liquid injection device 5/the second liquid injection device 6.

In the embodiment, the preparation equipment can realize the purpose of automatic production, effectively improve the production efficiency, and simultaneously, automatically inject liquid through a machine during liquid injection, so that the manual operation of workers is reduced, the production efficiency is improved, and meanwhile, the situation that electrolyte generates chemical inhalation to the workers is reduced, the production safety is effectively improved, and the occurrence of inhalation poisoning events of the workers is reduced; meanwhile, when the machine is used for injecting liquid, the liquid can be injected quantitatively, the aim of saving the electrolyte can be fulfilled, and the production cost is effectively reduced.

In one embodiment, the first injection device 5/the second injection device 6 comprises: the first tray 16 is provided with two groups of material groove groups at intervals, each group of material groove group comprises a plurality of material grooves 17 arranged at intervals, each material groove 17 is used for placing an integrated pole piece, the inner wall of one end, close to a groove opening, of each material groove 17 is provided with a overflowing groove 19, a plurality of reinforcing ribs 20 are arranged between the outer side wall of each material groove 17 and the upper surface of the first tray 16, and a liquid guide channel 18 is arranged between every two adjacent overflowing grooves 19;

liquid outlets are arranged among the material trough groups, the other end of each liquid outlet is connected with a first material guiding pipe 32, the other end of each first material guiding pipe 32 is connected with a second material guiding pipe 22, and the second material guiding pipe 22 is connected with a material box;

the lower bottom surface of the first tray 16 is erected on a fifth transverse plate 38, a sixth transverse plate 42 is arranged below the fifth transverse plate 38, second vertical plates 35 are arranged below the sixth transverse plate 42 at intervals, slide rail assemblies 43 are respectively arranged on opposite sides of the second vertical plates 35, a fourth transverse plate 36 is arranged between the two slide rail assemblies 43, one side surface of the fourth transverse plate 36 is connected with a third vertical plate 46, the other end of the third vertical plate 46 is connected with the fifth transverse plate 38, and a handle 47 is arranged on one side of the third vertical plate 46 away from the fifth transverse plate 38;

a stop block 44 is arranged on the other side surface of the fourth transverse plate 36, a detection rod 45 is arranged on the upper surface of the stop block 44, and the detection rod 45 is used for detecting and limiting the movable position or the movable range of the fifth transverse plate 38;

first guide rods 21 are arranged on the lower surface of the fourth transverse plate 36 at intervals, first screw rods 24 are arranged between the first guide rods 21, one end of each first screw rod 24 is in threaded connection with a second transverse plate 15, and the second transverse plate 15 is erected on the second transverse rod 14;

two second guide sleeves 41 are arranged on the second transverse plate 15 at intervals, and the second guide sleeves 41 are respectively arranged corresponding to the two first guide rods 21 one by one and used for guiding the movement directions of the two first guide rods 21;

a first guide sleeve 40 is arranged between the second guide sleeves 41, the first guide sleeve 40 is in threaded connection with a first screw 24, the other end of the first screw 24 is connected with a driving assembly, the first guide rod 21 and the driving assembly are respectively erected on a third transverse plate 23, drag chain boxes 25 are symmetrically arranged between the third transverse plate 23 and the second transverse plate 15, the drag chain boxes 25 are used for arranging drag chains, one end of each drag chain is connected with the third transverse plate 23, and the other end of each drag chain is connected with the second vertical plate 35;

still be equipped with inspection hole 39 on the second diaphragm 15, the upper surface and the lower surface of second diaphragm 15 are equipped with first L board 33 respectively, one side that first L board 33 is close to inspection hole 39 downthehole wall is equipped with sensor 34 respectively, fourth diaphragm 36 is close to one side of inspection hole 39 is equipped with detection strip 37, detection strip 37 with sensor 34 mutually supports, and is right the height of the reciprocal operation of fourth diaphragm 36 monitors.

In this embodiment, the first liquid injection device 5 or the second liquid injection device 6 is injected with the electrolyte according to preset parameters, so that the workpiece on the first tray 16 can be automatically produced; when first tray 16 puts into corresponding notes liquid station, according to the detection information of detection pole 45, confirm first tray 16 arranges correct operating position in, can start the transfer pump in the workbin, the transfer pump will be with the electrolyte in the workbin via second passage 22 and first passage 32 derive extremely in the silo 17 to the realization carries out the purpose that electrolyte soaks and infiltrates to the work piece in the silo 17.

In one embodiment, the first cross bars 11 are oppositely arranged on the inner walls of the two sides of the frame body 1, and the heights of the two first cross bars 11 are different; one of the first cross bars 11 is provided with a first translation mechanism 7, the lower surface of the other cross bar is provided with a first track 48, the upper surface of the first translation mechanism 7 and the lower surface of the first track 48 are slidably connected with the lower surface of one side and the upper surface of one side of the aging mechanism 9, and the aging mechanism 9 reciprocates along with the first translation mechanism 7 and the first track 48;

the aging mechanism 9 includes: a seventh transverse plate 49, wherein one side of the seventh transverse plate 49 close to the first rail 48 is hung on the slide rail of the first rail 48 through a slide block, one side of the seventh transverse plate 49 close to the first translation mechanism 7 is arranged on the upper surface of the second rail plate 50 of the first translation mechanism 7 through a second slide block 64 in a sliding manner,

first air pump assemblies 56 are symmetrically arranged on two sides of the seventh transverse plate 49, a driving rod of each first air pump assembly 56 is connected with a push plate 57, one surface, far away from the driving rod, of each push plate 57 is connected with a U-shaped clamping rod 52 with a U-shaped structure, the U-shaped open ends of the U-shaped clamping rods 52 are oppositely arranged, bearing plates 58 for placing articles are arranged in the U-shaped notches of the U-shaped clamping rods 52 at intervals, and the bearing plates 58 are used for placing the first tray 16;

two ends of the U-shaped clamping rod 52 are respectively provided with a guide plate 54, and one end of the guide plate 54, which is far away from the U-shaped clamping rod 52, is used for being attached to the inner wall of a through hole 53 arranged on the seventh transverse plate 49; a plurality of air pump valves 55 are arranged on the first air pump assembly 56, and the air pump valves 55 are used for matching with the first air pump assembly 56 to push the push plate 57; one side of the first translation mechanism 7 is provided with a second motor 61, and the second motor 61 is used for driving a second sliding block 64 of the first translation mechanism 7 to reciprocate.

The sorting mechanism 8 is erected on the inner top surface of the rack body 1 through a plurality of second translation mechanisms 10, and the second translation mechanisms 10 are erected on the inner top of the rack body 1 through a plurality of third L-shaped plates 69;

the sorting mechanism 8 includes: a fourth L-shaped plate 71, one end of the fourth L-shaped plate 71 is connected to the second translation mechanism 10, the other end of the fourth L-shaped plate 71 is connected to a second air pump assembly 72, a driving end of the second air pump assembly 72 is connected to a connection platform 73, a push rod 74 is arranged below the connection platform 73, a lower bottom end of the push rod 74 is connected to a U-shaped frame 75 with a U-shaped structure, a U-shaped opening of the U-shaped frame 75 faces downward, a U-shaped opening end of the U-shaped frame 75 is connected to a connection plate 77, a plurality of installation notches 80 are arranged on the connection plate 77 at intervals, a plurality of air rods 76 are arranged in each installation notch 80 at intervals, an upper end of each air rod 76 is connected to an output end of a negative pressure device, lower ends of the air rods 76 are respectively provided with suction nozzles 78 one by one, and the suction nozzles 78 are used for sorting defective products or for grabbing and displacing the first tray 16;

the upper top surface of the second air pump assembly 72 is connected with the lower bottom surface of the fourth L-plate 71 through a second mounting plate 79, the side wall of the second air pump assembly 72 is connected with the second translation mechanism 10 through a third mounting plate, and the second translation mechanism 10 reciprocates above the aging station.

In this embodiment, after the first liquid injection device 5 or the second liquid injection device 6 soaks or permeates the workpiece with the electrolyte, the charging device on the first tray 16 is started again, the charging device is used to charge the integrated pole piece with the electrolyte, after the charging is finished, the second translation mechanism 10 is started, the sorting mechanism 8 is moved to the working position of the first liquid injection device 5 or the second liquid injection device 6 by the second translation mechanism 10, the first tray 16 which has completed the work of permeating the electrolyte is lifted by the sorting mechanism 8, and the first tray 16 is moved into the aging station by the second translation mechanism 10 again, the upper top surface of the aging station is hung with a plurality of aging pipelines, that is, the inner top surface of the rack body 1 is provided with a plurality of aging pipelines facing the aging station and used for outputting the aging station at a high temperature; thereby realizing high-temperature aging of the workpiece after the electrolyte infiltration; after the high temperature ageing is finished, the visual inspection mechanism arranged at the top in the frame body 1 is utilized to carry out appearance detection, the testing device is utilized to carry out impedance detection on the workpiece, the sorting mechanism 8 is utilized to carry out good product retention, defective products are removed, the production process of ageing and grading is completed, and the purpose of automatic high-efficiency production is realized.

In this embodiment, the aging pipeline may be further connected to the heating pipeline of the reaction kettle, and the heating pipeline and the aging pipeline are communicated or closed through the electromagnetic valve, so that when the aging pipeline works, the electromagnetic valve may be opened according to a heating instruction of the controller, and the aging pipeline is favorable for guiding the heat energy/heat source into the heating pipeline of the reaction kettle; the condition that the working temperature in the reaction kettle cannot be normally adjusted after the temperature control device fails in the production or trial production process can be prevented.

In one embodiment, the first translation mechanism 7/second translation mechanism 10 comprises: the driving end of the driving part is connected with a second screw 62, the other end of the second screw 62 is rotatably connected with one end, far away from the driving part, of the second track plate 50 or the third track plate 70 of the U-shaped structure, a first sliding block 63 is connected to the second screw 62 in a threaded manner, a second sliding block 64 is arranged at one end, close to the opening of the U-shaped structure of the second track plate 50 or the third track plate 70, of the first sliding block 63 in an outward extending manner, and the second sliding block 64 is used for being connected with a seventh horizontal plate 49 or a third mounting plate;

a protection plate 68 is further arranged at the U-shaped opening end of the second track plate 50 or the third track plate 70, a plurality of sensors 34 are arranged at intervals on one side of the second track plate 50 or the third track plate 70, and a detection strip 37 matched with the sensors 34 is arranged on one side of the second sliding block 64 close to the sensors 34;

the first sliding block 63 and the second sliding block 64 form a U-shaped structure, and the guard plate 68 is positioned in the U-shaped structure formed by the first sliding block 63 and the second sliding block 64; a third slide rail 65 is further disposed on the U-shaped inner bottom surface of the second track plate 50 or the third track plate 70, and the third slide rail 65 is used for being matched with the first slide block 63 and allowing the first slide block 63 to reciprocate in the second track plate 50 or the third track plate 70; the first motor 26, the second motor 61 and the third motor 66 are all connected with the controller through wires 27.

The driving part includes: a second motor 61 or a third motor 66, wherein the driving end of the second motor 61 is connected with the first translation mechanism 7, the driving end of the second motor 61 is used for being connected with the second translation mechanism 10, the output end of the second motor 61 is also connected with a driving component,

the drive assembly includes: and the driving wheel 30 is connected with the output end of the second motor 61 or the first motor 26, one end of the second screw 62 or the first screw 24 of the second translation mechanism 10 is connected with the driven wheel 28, and the driving wheel 30 and the driven wheel 28 are connected through a belt 29.

A first vertical plate 13 is respectively arranged on one side of the first liquid injection device 5 far away from the second liquid injection device 6 and one side of the second liquid injection device 6 far away from the first liquid injection device 5; a driving wheel 30 connected with the first motor 26 is erected on the lower bottom surface of the third transverse plate through a first mounting plate 31;

one side of the seventh transverse plate 49, which is close to the first rail 48, is further erected on the inner wall of the frame body 1 through a second L-shaped plate 51, second guide rods 59 are symmetrically arranged on two sides of a driving rod of the first air pump assembly 56, and the second guide rods 59 are used for controlling the smoothness of the push plate 57; the driving device connected to the third motor 66 is mounted on one end of the third track plate 70 through a motor housing 67.

In this embodiment, the first translating mechanism 7 is configured to move the aging mechanism 9, and the second translating mechanism 10 is configured to move the sorting mechanism 8, so that the sorting mechanism 8 is used to cooperate with the first translating mechanism 7 and the second translating mechanism 10 to move or change the working position of the first tray 16, thereby achieving the purpose of fully automatic production; simultaneously, utilize automatic injection electrolyte to annotate the liquid process, reduce workman manual operation and lead to the condition that the efficiency of construction is low, the cost of labor is high, manual operation is improper leads to the defective products to increase, simultaneously, annotate the liquid process because of having abandoned manual operation electrolyte for production factor of safety is higher, reduces the condition that electrolyte produced health harm to the workman.

According to the invention, the preparation equipment can realize the purpose of automatic production, the production efficiency is effectively improved, meanwhile, automatic liquid injection is carried out through a machine during liquid injection, the manual operation condition of workers is reduced, the production efficiency is further improved, the chemical inhalation condition of electrolyte to the workers is reduced, the production safety is effectively improved, and the inhalation poisoning event of the workers is reduced; meanwhile, when the machine is used for injecting liquid, the liquid can be injected quantitatively, the aim of saving the electrolyte can be fulfilled, and the production cost is effectively reduced.

Specifically, the working principle of the preparation equipment is as follows:

the integrated pole pieces needing to be injected with the electrolyte are sequentially placed into a material groove 17 in a first tray 16, and the first tray 16 fully loaded with the integrated pole pieces is placed above a first liquid injection device 5 or a second liquid injection device 6; namely, the first tray 16 is placed on the upper surface of the fifth horizontal plate 38, and the handle 47 is pulled, so that the position of the first tray 16 on the fifth horizontal plate 38 is adjusted, and the liquid outlets below the first tray 16 correspond to each other; during adjustment, the handle 47 is pulled, the handle 47 drives the fourth horizontal plate 36 to reciprocate in the two slide rail assemblies 43 through the third vertical plate 46, and the slide rail assemblies 43 further drive the fifth horizontal plate 38 to reciprocate when reciprocating, so that the purpose of adjusting the position of the first tray 16 above the fifth horizontal plate 38 is achieved; in the adjusting process, in order to ensure the position accuracy, when the fifth transverse plate 38 triggers the detection rod 45, the controller will send an alarm instruction, make an alarm provided on the rack body 1 give an alarm, and instruct a worker to position the first tray 16;

then, the liquid outlet below the first tray 16 is connected with the first material guiding pipe 32 by suction through the suction disc; here, a plug-in conduit with a fast plug-in structure can also be used to connect the liquid outlet and the first material guiding pipe 32 in a conducting manner, and facilitate the subsequent fast separation of the two; the liquid outlet of the first tray 16 is communicated with the first material guiding pipe 32, then the infusion pump is started, the infusion pump outputs the electrolyte in the material box to the second material guiding pipe 22, the electrolyte is drained to the first material guiding pipe 32 through the second material guiding pipe 22, finally, under the action of pressure, the first material guiding pipe 32 injects the electrolyte into the overflow groove through the liquid outlet, the overflow groove outputs the electrolyte into the material box 17, and the integrated pole piece in the material box 17 is infiltrated with the electrolyte;

in the process of electrolyte infiltration, the controller times the electrolyte, when the infiltration state or infiltration (standing) time required by production is reached, the first motor 26 is started by the controller, the first motor 26 drives the driving wheel 30 to rotate, the driving wheel 30 drives the driven wheel 28 to rotate through the belt 29, the driven wheel 28 drives the first screw rod 24 to rotate, the first screw rod 24 rotates and is connected with the first guide sleeve 40 in a threaded manner, so that the first screw rod 24 drives the fourth transverse plate 36 to move up and down, and when the fourth transverse plate 36 moves up and down, the first tray 16 is driven to move up and down, so that the first tray 16 can be conveyed upwards to the aging station;

in the process that the first tray 16 is carried to move up and down, the detection strip 37 arranged on the side edge of the fourth transverse plate 36 passes through the sensors 34 arranged on the two first L-shaped plates 33 from bottom to top in sequence, or passes through the sensors 34 arranged on the two first L-shaped plates 33 from top to bottom in sequence, so as to detect the working position of the first tray 16;

the sensors 34 on the upper surface and the lower surface of the second transverse plate 15 are used for detecting the movement track of the first tray 16 reset to the liquid injection station, and prompting a worker to put a new first tray 16 into the liquid injection station;

when the sensor 34 performs the auxiliary production, the sensor 34 from the lower surface to the upper surface of the second horizontal plate 15 detects the passing information of the detection strip 37 in sequence, and then the first tray 16 is in the ascending state; when the sensors 34 on the upper surface to the lower surface of the second horizontal plate 15 sequentially detect the passing information of the detection bar 37, it is determined that the first tray 16 is in the descending state.

When the first tray 16 rises, after the sensor 34 on the lower surface and the sensor 34 on the upper surface of the second transverse plate 15 detect passing information, the first translation mechanism 7 is synchronously started, the aging mechanism 9 is driven by the first translation mechanism 7 to move in position, so that the aging mechanism 9 can be flush with the upper surface of the first liquid injection device 5 or the second liquid injection device 6, at the moment, the second translation mechanism 10 and the sorting mechanism 8 are started again, the first tray 16 on the rising first liquid injection device 5 or the second liquid injection device 6 is adsorbed, and the adsorbed first tray 16 is moved to an aging station of the aging mechanism 9; during specific work, the second motor 61 is started firstly, the second motor 61 drives the first translation mechanism 7 to work after working, during the first translation work, the second screw 62 rotates to drive the first slider 63 and the second slider 64 to move, and the first slider 63 and the second slider 64 drive the seventh transverse plate 49 connected with the second slider 64 to translate in the moving process, so that the aging mechanism 9 and the first injection device 5 or the second injection device 6 perform the position of the regulator according to the working state or the working position, for example, when the first injection device 5 ascends, the aging mechanism 9 is displaced to the upper top surface of the second injection device 6, and when the second injection device 6 ascends, the aging mechanism 9 is displaced to the upper top surface of the first injection device 5, so that the ascending first pallet 16 can be conveniently clamped by the sorting mechanism 8 and moved to the aging station of the aging mechanism 9, and the workpiece on the first pallet 16 can be conveniently clamped.

When the sorting mechanism 8 works, the second translation mechanism 10 drives the sorting mechanism 8 to translate to the position above the corresponding first liquid injection device 5 or second liquid injection device 6, the sorting device is started, and the suction nozzle 78 of the sorting device is used for sucking the first tray 16, so that the first tray 16 is lifted; when the first tray 16 is lifted, the first liquid injection device 5 or the second liquid injection device 6 descends and resets; the aging mechanism 9 is started again and is shifted to the position below the first tray 16 adsorbed by the sorting device; the visual inspection mechanism arranged on the inner top surface of the frame body 1 is used for monitoring the positions of the first tray 16 and the aging station in real time and guiding the translation positions or translation distances of the sorting device and the aging mechanism 9 according to real-time monitoring information, so that the sorting device can drive the first tray 16 to be accurately placed on the aging mechanism 9;

when the tray is placed, the two first air pump assemblies 56 on the aging mechanism 9 are driven, the distance between the two U-shaped clamping rods 52 is pulled, and then the first tray 16 is placed on the bearing plates 58 of the two U-shaped clamping rods 52 by using the sorting mechanism 8; the suction nozzle 78 of the sorting mechanism 8 is retracted and reset, the first air pump assembly 56 is started again, the first air pump assembly 56 is used for driving the push plate 57 to shorten the distance between the U-shaped clamping rods 52, and the U-shaped clamping rods 52 are used for clamping two ends of the first tray 16;

at this time, the aging pipeline is started, so that the aging pipeline can age the first tray 16 on the aging station at a high temperature; after ageing, the mechanism is examined to the look of recycling 1 interior tops of support body sets up carries out the appearance and detects, utilizes testing arrangement to carry out impedance detection to the work piece, utilizes letter sorting mechanism 8 to carry out the yields and remains, and defective products are rejected to accomplish the production processes of ageing and partial volume, realize the purpose of automatic high-efficient production.

When sorting defective products, sorting mechanism 8 is started to carry out defective product marking according to the visual inspection mechanism and the testing device on the first tray 16, so that sorting mechanism 8 can reject defective products according to the defective product marking, thereby realizing a complete production flow, sorting mechanism 8 can shift according to the directions of x, y and z axes of first translation mechanism 7, second translation mechanism 10 and push rod 74 in the sorting process, thereby enabling sorting mechanism 8 to carry out suction of defective products with its suction nozzle 78, and further completing the work of sorting defective products.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for improving the specific surface area of a precursor of a positive electrode material of a lithium ion battery is characterized by comprising the following steps:

further comprising: coating, namely coating the prepared positive electrode slurry on a current collector, and heating the current collector to obtain a pole piece with the slurry;

baking and injecting liquid, drying the integrated pole piece, injecting electrolyte, and forming an electrode material of the lithium ion battery;

injecting liquid into the integrated pole piece by using preparation equipment;

the preparation apparatus comprises: a frame body is arranged on the frame body, a plurality of seal plates are arranged on the frame body;

the aging mechanism is arranged on the first cross rod through a first translation mechanism and is erected between the second translation mechanism and the first liquid injection device/the second liquid injection device;

the first priming device/the second priming device comprises: the integrated pole piece feeding tray comprises a first tray, wherein two groups of material groove groups are arranged on the first tray at intervals, each group of material groove group comprises a plurality of material grooves which are arranged at intervals, an integrated pole piece is placed in each material groove, a overflowing groove is arranged on the inner wall of one end, close to a groove opening, of each material groove, a plurality of reinforcing ribs are arranged between the outer side wall of each material groove and the upper surface of the first tray, and a liquid guide channel is arranged between every two adjacent overflowing grooves;

the lower bottom surface of the first tray is erected on a fifth transverse plate, a sixth transverse plate is arranged below the fifth transverse plate, second vertical plates are arranged below the sixth transverse plate at intervals, sliding rail assemblies are respectively arranged on the opposite surfaces of the second vertical plates, a fourth transverse plate is arranged between the two sliding rail assemblies, one side surface of the fourth transverse plate is connected with the third vertical plate, the other end of the third vertical plate is connected with the fifth transverse plate, and a handle is arranged on one side, away from the fifth transverse plate, of the third vertical plate;

first guide rods are arranged on the lower surface of the fourth transverse plate at intervals, first screw rods are arranged between the first guide rods, one end of each first screw rod is in threaded connection with the second transverse plate, and the second transverse plate is erected on the second transverse rod;

2. The method for increasing the specific surface area of the precursor of the positive electrode material of the lithium ion battery according to claim 1, further comprising the following steps:

formation, namely charging the integrated pole piece with the electrolyte;

sorting, namely testing the classified battery electrode materials and sorting the battery electrode materials according to the voltage and internal resistance; and subpackaging and warehousing the sorted electrode materials.

3. The method for improving the specific surface area of the lithium ion battery positive electrode material precursor according to claim 1, further comprising the steps of slitting the thin pole piece by using a slitting machine, and removing burrs of the slit thin pole piece by using a deburring device;

and, further comprising: if the temperature of the reaction kettle is lower than the preset temperature, the controller sends a temperature-raising instruction, and the temperature control device raises the temperature of the reaction kettle according to the temperature-raising instruction; meanwhile, when the current collector is heated, the heating device is used for conveying a heat source to the reaction kettle together with the temperature control device; the heat source is gas or liquid;

4. The method for increasing the specific surface area of the precursor of the positive electrode material of the lithium ion battery according to claim 2,

the liquid injection method for the integrated pole piece by using the preparation equipment comprises the following steps:

5. The method for increasing the specific surface area of the precursor of the positive electrode material of the lithium ion battery according to claim 1,

the first cross rods are oppositely arranged on the inner walls of the two sides of the frame body, and the heights of the two first cross rods are different; one of the first cross bars is provided with a first translation mechanism, the lower surface of the other cross bar is provided with a first rail, the upper surface of the first translation mechanism and the lower surface of the first rail are in sliding connection with the lower surface of one side and the upper surface of one side of the aging mechanism, and the aging mechanism is used for reciprocating along with the first translation mechanism and the first rail;

guide plates are respectively arranged at two ends of the U-shaped clamping rod, and one ends of the guide plates, which are far away from the U-shaped clamping rod, are used for being attached to the inner wall of the through hole arranged on the seventh transverse plate; the first air pump assembly is provided with a plurality of air pump valves, and the air pump valves are used for matching with the first air pump assembly to push the push plate; and a second motor is arranged on one side of the first translation mechanism and used for driving a second sliding block of the first translation mechanism to reciprocate.

6. The method for increasing the specific surface area of the precursor of the lithium ion battery positive electrode material according to claim 5,

7. The method for increasing the specific surface area of the precursor of the positive electrode material of the lithium ion battery according to claim 6, wherein the first/second translation mechanism comprises: the driving end of the driving part is connected with a second screw, the other end of the second screw is rotatably connected to one end, far away from the driving part, of a second track plate or a third track plate of the U-shaped structure, a first sliding block is connected to the second screw in a threaded manner, one end, close to an opening of the U-shaped structure of the second track plate or the third track plate, of the first sliding block extends outwards and is provided with a second sliding block, and the second sliding block is used for being connected with a seventh transverse plate or a third mounting plate;

the first sliding block and the second sliding block form a U-shaped structure, and the guard plate is positioned in the U-shaped structure formed by the first sliding block and the second sliding block; a third slide rail is further arranged on the U-shaped inner bottom surface of the second track plate or the third track plate, and the third slide rail is used for being matched with the first slide block and enabling the first slide block to reciprocate in the second track plate or the third track plate; the first motor, the second motor and the third motor are all connected with the controller through wires.

8. The method for increasing the specific surface area of the lithium ion battery positive electrode material precursor according to claim 7, wherein the driving part comprises: the driving end of the second motor is connected with the first translation mechanism, the driving end of the second motor is used for being connected with the second translation mechanism, the output end of the second motor is also connected with a driving component,

the drive assembly includes: the driving wheel is connected with the output end of the second motor or the first motor, one end of a second screw rod or a first screw rod of the second translation mechanism is connected with a driven wheel, and the driving wheel is connected with the driven wheel through a belt;