KR102334855B1 - Batch processing system for waste lithium secondary battery - Google Patents

Abstract

The present invention relates to a batch processing system for waste lithium secondary batteries, which disassembles and batch-processes waste lithium secondary batteries of a pack state used in electric vehicles, thereby effectively treating harmful electrolytes and efficiently recovering valuable metals, such as nickel, cobalt, manganese, and lithium, and aluminum and copper forming electrode plates. According to the present invention, the batch processing system comprises: a disassembling unit including a plurality of conveyors and a plurality of robots to disassemble a battery pack; a crushing unit receiving parts disassembled in the disassembling unit through the conveyor to crush the received parts; an alkali immersion unit processing the remaining electrolyte from crushed pieces supplied from the crushing unit, collecting a separator, and separating an active material; a precipitation unit finally separating the active material from solid materials discharged together with water from the alkali immersion unit; a heating unit receiving precipitate discharged from the precipitation unit and evaporating liquid components in the precipitate through heating; a classification unit classifying powder or granules discharged from the heating unit by size; and a valuable metal recovery unit separating and recovering each valuable metal component from a powdery material transferred from the classification unit.

Description

Batch processing system for waste lithium secondary battery

The present invention relates to a system for disassembling and collectively processing waste lithium secondary batteries, and more particularly, by collectively processing waste lithium secondary batteries in a pack state used in electric vehicles to effectively treat harmful electrolytes, It relates to a waste lithium secondary battery batch processing system capable of efficiently recovering valuable metals such as cobalt, manganese, and lithium, and aluminum and copper constituting the electrode plate.

In recent years, electric vehicles are rapidly spreading, and lithium secondary batteries used in electric vehicles are later discarded, so technology development for the treatment and recycling of the discarded lithium secondary batteries is being attempted.

As an example, Patent Document 1 below relates to a recycling device for a waste lithium ion battery, the shredder shredder that confirms whether the waste battery is completely discharged, the completely discharged waste battery is put in, and the shredding is performed in the air; An underwater crushing unit for crushing in water when a waste battery that has not been completely discharged is put into the inlet; a general crusher for crushing the fragments crushed by the underwater crusher and the fragments crushed by the shredder crusher into smaller pieces; a drying unit for drying the crushed pieces; and a classification unit for classifying and storing the crushed pieces dried in the drying unit.

As another example, the following Patent Document 2 relates to a waste battery recycling device, and a pre-processing unit that removes the electrolyte of a packaged battery and pulverizes a waste packaged battery and a waste bulk battery to separately obtain a paste, a grid, a synthetic resin, and a separator Wow; a material supply unit for feeding the grid and the paste to the first scraper conveyor through the discharging screw conveyor, and discharging the powdered coal, powdered iron, and soda ash to the first scraper conveyor and mixing them with each other to the second scraper conveyor and the input screw conveyor; a dissolving unit receiving a material supplied through the material supply unit and heating the material to dissolve the material; a kettle for temporarily storing the material after removing the slag of the material tapped from the melting part; a casting machine for producing lead ingots by receiving the filled material of the kettle through a lead pump; characterized by including.

Registered Patent Publication No. 10-2134719 (2020. 07. 16. Announcement) Registered Patent Publication No. 10-1348490 (2014. 01. 09. Announcement)

The problem to be solved in the present invention is to effectively treat harmful electrolytes by disassembling and treating the waste lithium secondary battery in a pack state used in electric vehicles in a batch process, and to construct an electrode plate with valuable metals of nickel, cobalt, manganese, and lithium. It is to provide a waste lithium secondary battery batch processing system that can efficiently recover aluminum and copper.

In order to solve the above problems, the waste lithium secondary battery batch processing system of the present invention includes: a disassembling unit for disassembling the battery pack to a module or cell unit, including a plurality of conveyors and a plurality of robots; a crushing unit for receiving the modules or cells decomposed in the disassembling unit through a conveyor and crushing them; an alkali immersion treatment unit for treating the remaining electrolyte from the crushed product pieces supplied from the crushing unit, collecting the separator, and separating the active material; a precipitation treatment unit for finally separating the active material from the solid materials discharged together with water from the alkali immersion treatment unit; a heat treatment unit to which the precipitate discharged from the precipitation treatment unit is put and to evaporate the liquid component in the precipitate through heat treatment; a classification processing unit for dividing the powder or grains discharged from the heat treatment unit by size; and a valuable metal recovery processing unit that separates and recovers each valuable metal component from the powdery material transferred from the classification processing unit, wherein the plurality of conveyors include a conveying conveyor that moves while the battery pack is disassembled, The robot of is composed of a battery pack robot that removes the cover of the battery pack and a module robot that separates the module from the battery pack with the cover open, or a battery pack robot that removes the cover of the battery pack and the battery with the cover open It consists of a module robot that separates the module from the pack and a cell robot that separates cells from the disassembled module, wherein the module robot separates cables and parts connecting the modules, and the disassembly and processing unit is applied to the battery pack robot. The cover of the battery pack separated by the module, the cables, parts, and modules separated by the module robot are separated and the remaining battery pack case is discharged to a separate storage area.

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In addition, the waste lithium secondary battery batch processing system of the present invention includes an alkali immersion tank in which the alkali liquid is stored in the alkali immersion treatment unit and a first ultrasonic generator, and a mesh filter connected to the alkali immersion tank. It includes a solid separation tank for filtering all of the substances, and a circulation tank connected to the alkali immersion tank and equipped with a filter to filter the separation membrane from the alkaline solution overflowing from the alkali immersion tank.

In addition, the waste lithium secondary battery batch processing system of the present invention overflows the alkali solution from the alkali immersion tank and sends it to the circulation tank, and the overflowed alkali solution is sent back from the circulation tank to the alkali immersion tank, and the solid separation tank is in a solid state Remove the alkali solution attached to the materials of the solid state and discharge the materials for the next process.

In addition, the waste lithium secondary battery batch processing system of the present invention includes a sedimentation tank for finally separating the active materials remaining on the aluminum plate and the copper plate by the ultrasonic wave generated by the second ultrasonic generator being provided in the sedimentation processing unit.

In addition, in the waste lithium secondary battery batch processing system of the present invention, the heat treatment part is made of a barrel having a cross-sectional shape of a left or right side or a right side, and an inlet into which the sediment is put is formed on the upper side of the side with a large cross section, but the cross section is small a heat treatment furnace having a steam outlet on one side of the upper side of the side where the evaporated steam is discharged, and an outlet at one side of the bottom of the side having a smaller cross section, and having a horizontal stirrer inside which is rotated by a driving means; and a steam treatment tank for removing harmful components from the vapor evaporated from the heat treatment furnace.

In addition, the waste lithium secondary battery batch processing system of the present invention is an ultrasonic classifier in which the classifying unit separates the powdery material of nickel, cobalt, manganese, lithium and graphite and the granular material of aluminum, copper, and other components ; a powder processing unit including a hopper through which a powdery material is introduced from the ultrasonic classifier, a valve installed under the hopper, and a third screw conveyor connected to a lower end of the valve; and a grain processing unit including a non-ferrous sorter for each of aluminum grains, copper grains, and other grains by using an eddy current to which a grainy material is introduced from the ultrasonic classifier.

In addition, the waste lithium secondary battery batch processing system of the present invention includes a reaction tank for sequentially leaching valuable metals dissolved in an acidic liquid and ionized in an acidic liquid while the valuable metal recovery processing unit changes the pH from acid to alkali, and sulfuric acid and hydrogen peroxide in the reaction tank , a reaction solution supply unit for supplying caustic soda, and a valuable metal recovery unit for recovering each valuable metal leached at a predetermined pH.

In addition, the waste lithium secondary battery batch processing system of the present invention includes a stirrer capable of controlling the stirring speed by using an inverter in the reaction tank, a temperature sensor measuring the temperature inside the reaction tank, and a pH meter measuring the pH of the solution inside the reaction tank is provided.

In addition, the waste lithium secondary battery batch processing system of the present invention comprises a diaphragm pump through which the valuable metal recovery unit flows in and discharges the leachate from the reaction tank, and a valuable metal separation tank for mining valuable metals while the leachate discharged from the diaphragm pump passes through. include

According to the waste lithium secondary battery batch processing system of the present invention, it is possible to effectively treat the electrolyte harmful to the human body in the process of disassembling the pack state of the waste lithium secondary battery used in the electric vehicle by providing a plurality of vacuum suction facilities.

In addition, according to the waste lithium secondary battery batch processing system of the present invention, it is possible to efficiently collect the battery pack case, the module case and other parts by providing the battery pack robot, the module robot and the cell robot.

In addition, according to the waste lithium secondary battery batch processing system of the present invention, the electrolyte can be finally removed and the separator can also be effectively collected by providing an alkali immersion treatment unit.

In addition, according to the waste lithium secondary battery batch processing system of the present invention, valuable metals such as nickel, cobalt, manganese, and lithium and aluminum and copper constituting the electrode plate can be efficiently recovered by providing the classification processing unit and the valuable metal recovery processing unit.

In addition, according to the waste lithium secondary battery batch processing system of the present invention, from the disassembling of the waste lithium secondary battery to the collecting and recovering of the main material can be processed in one batch, thereby greatly increasing the effectiveness of the system.

1 is a block diagram of a waste lithium secondary battery batch processing system according to an embodiment of the present invention.
2 is an enlarged view of the disassembly processing unit of the waste lithium secondary battery batch processing system according to an embodiment of the present invention.
3 is an enlarged view of the crushing unit of the waste lithium secondary battery batch processing system according to an embodiment of the present invention.
4 is an enlarged view of the alkali immersion treatment unit of the waste lithium secondary battery batch processing system according to an embodiment of the present invention.
5 is an enlarged view of the sedimentation processing unit of the waste lithium secondary battery batch processing system according to an embodiment of the present invention.
6 is an enlarged view of a heat treatment unit of a waste lithium secondary battery batch processing system according to an embodiment of the present invention.
7 is an enlarged view of the classification processing unit of the waste lithium secondary battery batch processing system according to an embodiment of the present invention.
8 is an enlarged view of a valuable metal recovery processing unit of a waste lithium secondary battery batch processing system according to an embodiment of the present invention.
9 is an enlarged view of part A of FIG. 8 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the waste lithium secondary battery batch processing system of the present invention is a decomposition processing unit 100, a crushing processing unit 200, an alkali immersion processing unit 300, a precipitation processing unit 400, a heat treatment unit 500, a classification processing unit 600 and a valuable metal recovery processing unit 700 .

Hereinafter, specific contents of the present invention will be described for each configuration.

The decomposition processing unit 100 is a configuration that decomposes the packed-state waste lithium secondary batteries (hereinafter referred to as “battery pack”) supplied to the transfer conveyor 111 down to the cell unit, and as shown in FIG. 2 , the conveyor 110 ) and a plurality of robots 130 .

At this time, the waste lithium secondary battery is completely discharged for safety and then supplied to the transfer conveyor 111 .

Specifically, the conveyor 110 is a transfer conveyor 111 that moves while the waste lithium secondary battery is disassembled, a plurality of conversion conveyors 113 that are provided so as to be lifted and lowered under the transfer conveyor 111, and the transfer conveyor It is disposed at a right angle to the 111 and consists of a plurality of discharge conveyors 115 for receiving and discharging the disassembled parts from the conversion conveyor 113.

And a centering device 120 is provided on one side of the transport conveyor 111 corresponding to each of the plurality of robots 130 to fix the position of the spent lithium secondary battery in the correct position, and thus fixed to the fixed position. In this state, the disassembly operation by the robot 130 is performed.

The plurality of robots 130 are provided in the order of the battery pack robot 131 , the module robot 133 , and the cell robot 135 from the entry side.

The battery pack robot 131 uses a vision to determine the type of battery pack from which manufacturer and vehicle, and disassembles according to a predetermined order.

At this time, the exterior of the battery pack can be cut and separated using a laser to open the cover or disassemble while replacing the tool using a tool changer. It is discharged to the storage location, and the remaining battery pack parts except for the cover are moved along the transfer conveyor 111 .

The module robot 133 separates the module from the battery pack with an open cover. Like the battery pack robot 131, the module robot 133 uses a vision to check the location to work, and uses a necessary tool to separate the module. Conduct.

Specifically, a workbench 125 is provided in front of the modular robot 133, and a clamping device is provided on the workbench 125 to hold the battery pack, and the workbench 125 is mounted on a lifting device. to be lifted by

The clamping device can turn the battery pack over while holding the battery pack, and the module robot 133 separates the cables and other parts connecting the modules in a state in which the cover is turned over the battery pack, The separated parts fall down and are collected in a container provided separately on the work bench 125 .

After that, the clamping device moves the container to the conversion conveyor 113 side, and the container is discharged to a separate storage place through the conversion conveyor 113 and the discharge conveyor 115 .

On the other hand, when the cable and other parts are separated, the battery pack is turned over again to its original state, and in that state, the module robot 133 separates the module from the battery pack, and the separated module is installed in the module robot 133. It is mounted on the transfer conveyor 111 using a gripper and transferred.

And the module is separated and the remaining battery pack case is discharged to a separate storage place through the conversion conveyor 113 and the discharge conveyor 115.

The cell robot 135 separates the cell from the disassembled module, and may separate the cell from the module using a dedicated tool, and in some cases may separate the cell from the module through cutting.

At this time, the separated cells are mounted on the transfer conveyor 111 and transferred, and the remaining module parts are discharged to a separate storage place through the conversion conveyor 113 and the discharge conveyor 115 .

Meanwhile, the cell separation operation by the cell robot 135 may be omitted in consideration of the difficulty and operation time of the operation.

In the present invention, in the case of cutting using a laser during the decomposition process, electrolytes harmful to the human body may leak. 1 A vacuum suction facility 150 is further provided.

The first vacuum suction facility 150 sucks the surrounding air of the battery pack robot 131, the module robot 133, and the cell robot 135 into a vacuum, and the sucked air is a first steam treatment tank containing water ( 155) to filter out the gaseous electrolyte leaked from the first vapor treatment tank 155, and then discharge clean air to the atmosphere.

And when the concentration of the leaked gas is thick, it can be configured to immediately sound a warning alarm by the sensor, thereby preventing the worker from being exposed to a dangerous environment.

As shown in FIG. 3, the crushing unit 200 is configured to receive the parts disassembled in the disassemble processing unit 100 through a transfer conveyor 111 and crush them, and a hammer mill 210 that crushes them somewhat roughly. It is composed of a crusher mill 230 that crushes something crushed in the hammer mill 210 to a slightly finer degree.

At this time, while passing through the crusher mill 230 , product pieces having various physical properties such as electrolyte, plastic, and vinyl are generated, and the product pieces are transferred to the device for the next process through the first screw conveyor 250 .

In addition, since the evaporated electrolyte leaks during the crushing process, a second vacuum suction facility 270 is provided in the hammer mill 210 and the crusher mill 230 to treat this.

The second vacuum suction facility 270 sucks the air inside the hammer mill 210 and the crusher mill 230 into a vacuum, and the sucked air is sent to the second steam treatment tank 275 containing water for second steam treatment After filtering out the leaked gaseous electrolyte from the tank 275, clean air is discharged into the atmosphere.

As shown in FIG. 4 , the alkali immersion treatment unit 300 finally processes the electrolyte remaining in the crushed product pieces supplied from the first screw conveyor 250 of the crushing unit 200, and the separation membrane and active material As a configuration for separating the, it consists of an alkali immersion tank 310, a solid separation tank 330 and a circulation tank (350).

At this time, in consideration of the total processing capacity of the system, the alkali immersion tank 310 , the solid separation tank 330 , and the circulation tank 350 may be provided in plurality.

Specifically, in the alkali immersion tank 310, an appropriate amount of the alkali solution supplied from the outside is stored, the electrolyte remaining in the product pieces put into it is dissolved by the alkali solution, and the separator among the product pieces floats lightly. However, the overflow is sent to the circulation tank 350 to collect the separation membrane, and the overflowed alkali solution is sent from the circulation tank 350 to the alkali immersion tank 310 again, and this process is repeated for a predetermined time. will do

And when the removal of the separator is completed, the first ultrasonic generator 313 provided in the alkali immersion tank 310 is operated to separate the cathode active material attached to the aluminum plate and graphite, which is the anode active material attached to the copper plate, among the product pieces. In this case, the ultrasonic wave is preferably about 40 khZ.

The cathode active material is composed of valuable metal components such as nickel, cobalt, manganese, and lithium.

In addition, a stirrer (not shown) may be additionally installed for more effective active material removal operation.

When the peeling operation of the active material is completed in this way, the valve provided at the lower part of the alkali submersion tank 310 is opened to transfer the contents of the alkali submersion tank 310 to the solid separation tank 330 .

The solid separation tank 330 is provided with a mesh filter 333 to filter out all solid materials, and the remaining solution is recovered to the circulation tank 350 .

At this time, the alkali solution is removed by supplying water from the upper part to the lower part and washing with water in order to remove the alkali solution adhering to the solid materials.

After that, when the removal of the alkali solution is completed, water is supplied from the bottom to the top to wash the mesh filter, and at the same time to discharge the solid materials together with water for the next process.

The circulation tank 350 is provided with a filter 353 therein to filter the separation membrane from the alkaline solution overflowing from the alkali submersion tank 310, and the remainder is sent back to the alkali submersion tank 310 using a pump. let it be

As shown in FIG. 5 , the precipitation treatment unit 400 is configured to finally separate the active material from solid materials discharged together with water from the solid separation tank 330 , and includes a settling tank 410 and a second screw. It consists of a conveyor 430 .

In this case, the settling tank 410 may be provided in plurality in consideration of the total processing capacity of the system.

Specifically, the sedimentation tank 410 is provided with a second ultrasonic generator 413, so that the active materials remaining on the aluminum plate and the copper plate are finally separated by the ultrasonic wave generated, and a stirrer (not shown) for more effective separation of the active material may be further provided.

At this time, the active material deposited in the sedimentation tank 410 is made in a powder state.

And when the second ultrasonic generator 413 stops working for a predetermined time, it waits for a predetermined time to precipitate the active material, and when the precipitation is completed, the water in the sedimentation tank 410 is drained until it reaches an appropriate level, at this time it is precipitated on the bottom Be careful not to float any valuable metals.

And when the drain operation is finished, a valve provided in the lower part of the settling tank 410 is opened to discharge the sediment.

The second screw conveyor 430 is configured to transfer the sediment discharged from the sedimentation tank 410 to an apparatus for the next process.

As shown in FIG. 6 , the heat treatment unit 500 is configured to evaporate the liquid component in the precipitate through heat treatment after the precipitate discharged from the settling tank 410 is input, and a heat treatment furnace 510 and a third steam treatment It is configured to include a jaw (530).

Specifically, the heat treatment furnace 510 is made of a barrel having a cross-sectional shape of left and right narrow or right wide left, and the inlet 511 through which the sediment is put in the upper one side of the larger cross-section is on the upper side of the smaller cross-section. The vapor outlet 512 through which the vapor evaporated is discharged, the outlet 513 is provided on one side of the bottom of the smaller cross-section, and a horizontal stirrer 514 rotated by a driving means is provided therein.

In addition, a thermal jacket is provided on the outer periphery of the heat treatment furnace 510 to circulate heat oil so that the heat treatment furnace 510 can be heated by the high temperature heat medium oil, and the heat treatment furnace 510 is heated to about 300°C. .

Since the vapor evaporated in the heat treatment furnace 510 may contain harmful components, the harmful components in the steam are removed after being sent to the second steam treatment tank 530 .

In addition, a vacuum pump (not shown) may be connected to the heat treatment furnace 510 , and the removal time of harmful components may be shortened by operating the inside of the heat treatment furnace 510 in a vacuum state.

On the other hand, when the steam is completely evaporated by operating the heat treatment furnace 510 for a predetermined time, the deposited precipitate becomes a powder or granular state, and after the state is reached, the valve provided at the lower part of the outlet 513 is opened and discharged.

A first magnetic feeder 550 may be provided between the outlet 513 of the heat treatment furnace 510 and the classification processing unit 600 , and the first magnetic feeder 500 removes iron from powder or granules. It is transferred to the classification processing unit (600).

As shown in FIG. 7 , the classifying unit 600 divides the powder or grains discharged from the heat treatment furnace 510 by size, and includes an ultrasonic classifier 610 , a powder processing unit 630 , and a grain processing unit 650 . ) is composed of

Specifically, the ultrasonic classifier 610 is a powdery material, that is, a material of nickel, cobalt, manganese, lithium, and graphite components constituting the active material, and a material of a granular state, that is, aluminum, copper, and other components. separate

The powder processing unit 630 is a place for processing a powdery material, a hopper 631 into which a powdery material is introduced from the ultrasonic classifier 610, and a valve 632 installed under the hopper 631. and a third screw conveyor 633 connected to the lower end of the valve 632 .

When the powdery material is put into the hopper 631 to an appropriate level, the valve 632 is opened and the powdery material is supplied to the valuable metal recovery processing unit 700 by an appropriate amount through the third screw conveyor 633 .

In this case, the valve 632 may be composed of an automatic valve and a rotary valve, and an input valve 633a is provided on the discharge side of the third screw conveyor 633 .

In addition, it is preferable to finally remove the iron component that may exist by further providing a line magnetic filter 634 at the lower end of the valve 632 .

The granule processing unit 650 is configured to include a non-ferrous sorter 653 into which the granular material is introduced from the ultrasonic classifier 610 .

The non-ferrous sorter 653 is a sorter using an eddy current, and sorts aluminum grains, copper grains, and other grains, respectively, and stores them in a separate tone bag.

And the aluminum grains, copper grains, and other grains selected in this way are put into a recycling process and used later if necessary.

As shown in FIG. 8 , the valuable metal recovery processing unit 700 is configured to separate and recover the valuable metal components from the powdery material, and includes a reaction tank 710 , a reaction solution supply unit 730 , and a valuable metal recovery and a portion 750 .

Specifically, the reaction vessel 710 is a reaction vessel in which valuable metal is leached, and is made of a stainless material, and includes a stirrer 711 capable of adjusting the stirring speed using an inverter, and a temperature for measuring the temperature inside the reaction tank 710 . A sensor 712 and a pH meter 713 for measuring the pH of the solution inside the reaction tank 710 are provided.

In addition, the reaction tank 710 is preferably heated to about 60 ~ 80 ℃ by the electric heater 720 provided outside in order to increase the extraction efficiency of valuable metals.

The reaction solution supply unit 730 includes a storage tank 731 for storing sulfuric acid, hydrogen peroxide, and caustic soda, respectively, and sulfuric acid, hydrogen peroxide, and caustic soda from each storage tank 731 to the reaction tank 710 for quantitative supply. It includes a metering pump 732 and a check valve 733 connected to each metering pump 732 to prevent reverse flow.

In addition, the reaction solution supply unit 730 is further provided with a flow meter 734 and a level meter 735, and through the flow meter 734 and the level meter 735, appropriate amounts of sulfuric acid and hydrogen peroxide are converted into a strongly acidic reaction tank ( 710) may be stored.

As described above, when a certain amount of powdery material is added in a state where appropriate amounts of sulfuric acid and hydrogen peroxide are stored in the reaction tank 710 , the input valve 633a is closed and the stirrer 711 is operated.

When it is judged that the powder is dissolved in the strongly acidic liquid and all ionized through stirring for an appropriate time, the stirring is stopped and caustic soda is added to change the pH from acid to alkali, and the ionized valuable metal dissolved in the acidic liquid is leached out in turn. .

That is, by repeating the process of leaching valuable metals after adjusting to a predetermined pH, it is possible to recover valuable metals such as nickel, cobalt, manganese, and lithium.

For example, when the pH is 5, nickel is leached, when the pH is 6, cobalt is leached, when the pH is 7, manganese is leached, and when the pH is 8, lithium is leached.

Here, the type of leachate according to the value of the pH is merely an example.

The valuable metal recovery unit 750 is configured to recover each valuable metal leached at a predetermined pH. and a valuable metal separation tank 753 for mining valuable metals while passing through the leachate.

As shown in FIG. 9 , the valuable metal separation tank 753 has a leachate flowing in the lower part and the leachate flowing out of the upper part, and a filter 753a is provided in the middle so that valuable metals are mined during the flow of the leachate. .

At this time, the leachate discharged from the valuable metal separation tank 753 is sent back to the reaction tank 710 .

On the other hand, when it is determined that the valuable metal has been sufficiently mined in the valuable metal separation tank 753, water is supplied to wash all the chemical components attached to the valuable metal and then recover it.

After these valuable metals are recovered, graphite remains in the reaction tank 710 and is finally discharged together with water when the reaction tank 710 is washed.

Although preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it should be understood that the scope of the present invention extends to those substantially equivalent to the embodiments of the present invention. Various modifications may be made by those of ordinary skill in the art to which the invention pertains without departing from the spirit of the invention.

100: decomposition processing unit
200: crushing unit
300: alkali immersion treatment unit
400: sedimentation processing unit
500: heat treatment unit
600: classification processing unit
700: valuable metal recovery processing unit

Claims (11)

A disassembling unit for disassembling the battery pack to a module or cell unit, including a plurality of conveyors and a plurality of robots;
a crushing unit for receiving the modules or cells decomposed in the disassembling unit through a conveyor and crushing them;
an alkali immersion treatment unit for treating the remaining electrolyte from the crushed product pieces supplied from the crushing unit, collecting the separator, and separating the active material;
a precipitation treatment unit for finally separating the active material from the solid materials discharged together with water from the alkali immersion treatment unit;
a heat treatment unit to which the precipitate discharged from the precipitation treatment unit is put and to evaporate the liquid component in the precipitate through heat treatment;
a classification processing unit for dividing the powder or grains discharged from the heat treatment unit by size; and
a valuable metal recovery processing unit for separating and recovering each valuable metal component from the powdery material transferred from the classification processing unit;
is made of,
The plurality of conveyors include a transport conveyor that moves while the battery pack is disassembled,
The plurality of robots consists of a battery pack robot that removes the cover of the battery pack and a module robot that separates the module from the battery pack with the cover open, or the battery pack robot that removes the cover of the battery pack and the cover is open It consists of a module robot that separates modules from the battery pack and a cell robot that separates cells from the disassembled module.
The module robot separates the cables and parts connecting the modules,
The decomposition processing unit
A batch of waste lithium secondary batteries, characterized in that the battery pack cover separated by the battery pack robot, the cables, parts, and modules separated by the module robot are separated and the remaining battery pack case is discharged to a separate storage place processing system. delete delete According to claim 1,
The alkali immersion treatment unit
An alkali immersion tank having an alkali liquid stored thereon and a first ultrasonic generator, a solid separation tank connected to the alkali immersion tank and provided with a mesh filter for contents to filter out all solid substances, and a filter connected to the alkali immersion tank Waste lithium secondary battery batch processing system, characterized in that it includes a circulation tank for filtering the separation membrane from the alkali solution overflowed from the alkali immersion tank. 5. The method of claim 4,
The alkali solution overflows from the alkali immersion tank and is sent to the circulation tank, and the overflowed alkali solution is sent back from the circulation tank to the alkali immersion tank,
The solid separation tank is a waste lithium secondary battery batch processing system, characterized in that to remove the alkali solution adhering to the solid-state materials and discharge the solid-state materials for the next process. According to claim 1,
The precipitation processing unit
A waste lithium secondary battery batch processing system, characterized in that it includes a sedimentation tank that is provided with a second ultrasonic generator and finally separates the active materials remaining on the aluminum plate and the copper plate by the ultrasonic wave generated. According to claim 1,
The heat treatment unit
It is made of a barrel having a cross-sectional shape of left or right side, and the inlet for depositing the sediment is formed on one side of the upper side of the side with the larger cross-section, and the steam outlet through which the evaporated steam is discharged on the upper side of the side with the smaller cross-section has a cross-section a heat treatment furnace provided with an outlet on one side of the smaller bottom, and having a horizontal stirrer inside which is rotated by a driving means;
a steam treatment tank for removing harmful components from the vapor evaporated from the heat treatment furnace;
Waste lithium secondary battery batch processing system comprising a. According to claim 1,
The classification processing unit
an ultrasonic classifier that separates powdered materials of nickel, cobalt, manganese, lithium and graphite from particles of aluminum, copper, and other components;
a powder processing unit including a hopper through which a powdery material is introduced from the ultrasonic classifier, a valve installed under the hopper, and a third screw conveyor connected to a lower end of the valve; and
Waste lithium secondary battery batch processing system, characterized in that it is composed of a grain processing unit including a non-ferrous sorter that separates aluminum grains, copper grains, and other grains by using an eddy current in which a grainy material is introduced from the ultrasonic classifier. According to claim 1,
The valuable metal recovery processing unit
A reaction tank for sequentially leaching valuable metals dissolved in an acidic liquid and ionized in an acidic liquid while changing the pH from acid to alkali; A waste lithium secondary battery batch processing system, characterized in that it comprises a valuable metal recovery unit for recovering metal. 10. The method of claim 9,
In the reaction tank
A waste lithium secondary battery batch processing system, characterized in that it is equipped with a stirrer capable of adjusting the stirring speed using an inverter, a temperature sensor for measuring the temperature inside the reaction tank, and a pH meter for measuring the pH of the solution inside the reaction tank. 10. The method of claim 9,
The valuable metal recovery unit
A waste lithium secondary battery batch processing system comprising: a diaphragm pump for introducing and discharging the leachate from the reactor; and a valuable metal separation tank for mining valuable metals while the leachate discharged from the diaphragm pump passes.

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