Integrated equipment for separating graphite and copper foil on negative plate of lithium ion battery

Abstract

The utility model discloses integrated equipment for separating graphite and copper foil on a negative plate of a lithium ion battery, and belongs to the technical field of lithium ion battery recovery. Comprising a pretreatment water tank, a recovery water tank, a conveying mechanism, a pole piece fixing device, a spraying mechanism and a recovery liquid treatment system. The pretreatment water tank is used for dissolving a water-soluble adhesive to reduce the adhesive force of graphite and copper foil on the negative electrode plate, the electrode plate fixing device is used for fixing the pretreated negative electrode plate on the conveying mechanism, the conveying mechanism conveys the negative electrode plate to the position below the spraying mechanism, and the spraying mechanism sprays water to quickly separate the graphite from the copper foil. According to the equipment, the treatment of a large batch of negative plates can be completed within a short time, the separation efficiency is improved, the requirement of manual operation is reduced due to the automatic design of the equipment, and the automatic conveying of the negative plates and the efficient separation of graphite and copper foil are realized. Therefore, not only is the production efficiency improved, but also human errors are reduced, and the stability and consistency of the recovery process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium ion battery recycling technical field, concretely relates to a kind of integrated equipment of graphite and copper foil separation on lithium ion battery negative pole piece. BACKGROUND

[0002] Lithium ion battery has a series of advantages such as small volume, light weight, large energy density, high working voltage, long cycle life and no memory effect, has been widely used in camcorder, mobile phone, notebook computer, camera, portable measuring instrument, power bank etc., in addition, it is also the future electric vehicle, energy storage power station selectable high-energy power source.Lithium ion battery reaches the limit of service life, its subsequent reasonable treatment is an important problem to be solved.

[0003] At present, scrap lithium ion battery is obtained after disassembly or lithium ion battery negative pole piece production process produces corner material, electrode residual piece, and generally needs to separate active material graphite from matrix material copper foil on negative pole piece before next step treatment.

[0004] In prior art, traditional separation method often relies on manual, chemical solvent or inefficient mechanical means, difficult to efficiently complete large quantities of negative pole piece separation in short time, leading to long recovery process time and low efficiency.Chemical separation method uses strong acid or strong base as solvent, there is potential harm to the environment, and the treatment of waste water is more complex.In the separation process, existing technology can cause certain damage to copper foil or graphite, affect the quality of recycled materials, and reduce its secondary use value.

[0005] Therefore we make improvement, and propose a kind of integrated equipment of graphite and copper foil separation on lithium ion battery negative pole piece. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a kind of integrated equipment of graphite and copper foil separation on lithium ion battery negative pole piece, to at least solve one of the technical problems of prior art, to achieve the above purpose, the technical solutions adopted by the utility model are as follows:

[0007] The utility model provides an integrated equipment of graphite and copper foil separation on lithium ion battery negative pole piece, including pretreatment water tank, recovery water tank, conveying mechanism, pole piece fixing device, spray mechanism and recovery liquid processing system, wherein, conveying mechanism sets up in recovery water tank top, pole piece fixing device sets up in conveying mechanism, pole piece fixing device is used for fixing negative pole piece treated by pretreatment water tank on conveying mechanism, conveying mechanism is used for conveying negative pole piece fixed on conveying mechanism to the below of spray mechanism, spray mechanism is fixedly arranged above the side of conveying mechanism away from pretreatment water tank, the water flow of spray mechanism sprays and peels off graphite particle on negative pole piece, and graphite particle is recovered to recovery water tank along with water flow, recovery liquid processing system is connected with recovery water tank, and recovery liquid processing system is used for processing liquid mixture containing graphite wet material recovered to recovery water tank.

[0008] As a further scheme of the utility model: the conveying mechanism includes a support, two supports are fixedly arranged on both sides of the top of the recovery water tank, a transmission roller is rotatably arranged between the two ends of each support, a conveyor belt is overlapped between the two transmission rollers, and the transmission rollers are driven by a driving source.

[0009] As a further scheme of the utility model: a plurality of support rods are evenly arranged on the two supports, and a support secondary roller is rotatably connected to the top of the two support rods.

[0010] As a further scheme of the utility model: the pole piece fixing device includes a horizontal plate, a vertical plate, and a fixing bolt, the horizontal plate is fixedly arranged on the top surface of the conveyor belt, a plurality of vertical plates are evenly arranged on the horizontal plate through the fixing bolt, and the vertical plate and the horizontal plate cross each other.

[0011] As a further scheme of the utility model: the spray mechanism includes a support plate, a spray pipeline, and a spray head, two support plates are fixedly arranged on the two supports, the spray pipeline is erected on the top ends of the two supports, a plurality of spray heads are evenly arranged on the spray pipeline, and the spray head is in communication with the inside of the spray pipeline.

[0012] As a further scheme of the utility model: the recovery liquid processing system includes a centrifuge, a water circulation system, and a graphite wet material processing system, the centrifuge is in communication with the recovery water tank, the centrifuge performs solid-liquid separation on the liquid mixture containing graphite wet material in the recovery water tank, the separated liquid is transported to the spray mechanism for recycling after being treated by the water circulation system, and the separated solid graphite wet material is treated into graphite powder by the graphite wet material processing system.

[0013] As a further scheme of the utility model: the conveying mechanism, the pole piece fixing device and the spraying mechanism are all made of waterproof material.

[0014] As a further scheme of the utility model: the top of the pretreatment water tank is provided with an opening, and the bottom of the side of the pretreatment water tank is provided with a drain port.

[0015] As a further scheme of the utility model: the conveying mechanism is arranged above the opening provided at the top of the recovery water tank, and the recovery liquid treatment system is communicated with the liquid discharge port at the bottom of the side of the recovery water tank.

[0016] As a further scheme of the utility model: a controller is further included, which is at least in communication connection with the conveying mechanism, the spraying mechanism and the recovery liquid treatment system.

[0017] The utility model has the following beneficial effects:

[0018] The utility model discloses a lithium ion battery negative pole piece recovery device, which comprises a pretreatment water tank, a recovery water tank, a conveying mechanism, a pole piece fixing device, a spraying mechanism and a recovery liquid treatment system.

[0019] The utility model discloses a lithium ion battery negative pole piece recovery device, which comprises a pretreatment water tank, a recovery water tank, a conveying mechanism, a pole piece fixing device, a spraying mechanism and a recovery liquid treatment system.

[0020] The utility model discloses a lithium ion battery negative pole piece recovery device, which comprises a pretreatment water tank, a recovery water tank, a conveying mechanism, a pole piece fixing device, a spraying mechanism and a recovery liquid treatment system.

[0021] The utility model discloses a lithium ion battery negative pole piece recovery device, which comprises a pretreatment water tank, a recovery water tank, a conveying mechanism, a pole piece fixing device, a spraying mechanism and a recovery liquid treatment system. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model makes further illustration in combination with the drawings.

[0023] Figure 1 It is an integrated equipment structure schematic view of the utility model that separates graphite and copper foil on the lithium ion battery negative pole piece;

[0024] Figure 2 It is Figure 1 It is the structure amplification schematic view of A in the figure;

[0025] Figure 3 It is Figure 1 It is the structure amplification schematic view of B in the figure;

[0026] Figure 4 It is the structure frame diagram of the utility model recycling liquid processing system.

[0027] In the figure: 1, pretreatment water tank;2, recycling water tank;21, drainage port;3, conveying mechanism;31, support;32, transmission roller;33, conveyer belt;34, support rod;35, support auxiliary roller;4, pole piece fixing device;41, cross plate;42, vertical plate;43, fixed bolt;5, spraying mechanism;51, support plate;52, spraying pipeline;53, spray head;6, recycling liquid processing system;7, controller. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] In the description of the utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, a particular orientation configuration and operation, therefore, it should not be understood as a limitation on the utility model.

[0030] In addition, unless specifically stated and limited otherwise, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] Please refer to Figure 1 As shown in the utility model embodiment, the utility model provides a kind of graphite and copper foil separation integrated equipment on lithium ion battery negative pole piece, including pretreatment water tank 1, recovery water tank 2, conveying mechanism 3, pole piece fixing device 4, spraying mechanism 5 and recovery liquid treatment system 6.

[0032] Pretreatment water tank 1 top is provided with opening, and the bottom of the side of pretreatment water tank 1 is provided with drain port, in the processing process of negative pole piece, first, negative pole piece will be placed into pretreatment water tank 1 and is infiltrated to dissolve water-soluble adhesive attached on negative pole piece, to effectively reduce the adhesion between graphite and copper foil on negative pole piece.

[0033] Recovery water tank 2 is arranged on the side of pretreatment water tank 1, and recovery water tank 2 is not communicated with pretreatment water tank 1.Conveying mechanism 3 is erected on the opening provided on the top of recovery water tank 2 directly above, and pole piece fixing device 4 is arranged on conveying mechanism 3, and pole piece fixing device 4 is used to fix the negative pole piece treated by pretreatment water tank 1 on conveying mechanism 3, to prevent negative pole piece from being deviated or damaged in subsequent processing.Pole piece fixing device 4 is used to fix the negative pole piece treated by pretreatment water tank 1 on conveying mechanism 3, to prevent negative pole piece from being deviated or damaged in subsequent processing.

[0034] Spraying mechanism 5 is fixedly arranged on the side, away from pretreatment water tank 1, of conveying mechanism 3, and spraying mechanism 5 is arranged above, and the water flow sprayed by spraying mechanism 5 is stripped from graphite particles on negative pole piece, and graphite particles are recovered into recovery water tank 2 along with water flow.

[0035] Recovery liquid treatment system 6 is communicated with drain port 21 on the bottom of the side of recovery water tank 2, and recovery liquid treatment system 6 is used to treat liquid mixture containing graphite wet material recovered into recovery water tank 2, and liquid mixture is separated into liquid and solid after being treated by recovery liquid treatment system 6, and finally wet graphite material is separated from clean water, and clean water separated can be further returned to spraying mechanism 5 for next round of spraying and cleaning, and water resource is recycled, and wet graphite material is converted into high-quality graphite powder after being treated.

[0036] It can be understood that the device is also provided with a controller 7, which can be in communication connection with the conveying mechanism 3, the spraying mechanism 5 and the recycling liquid treatment system 6. The orderly operation of the conveying mechanism 3, the spraying mechanism 5 and the recycling liquid treatment system 6 is coordinated and controlled through the controller 7, so as to improve the automation degree of the device, ensure the accurate operation and smooth connection of each link, and directly affect the processing efficiency and product quality. At the same time, the demand for manual intervention is greatly reduced, and the safety and stability of the overall operation are improved.

[0037] Please refer to Figure 1 In the embodiment, the conveying mechanism 3 includes two supports 31, which are respectively arranged on the top of the recycling water tank 2 through bolt fixing. One transmission roller 32 is rotatably arranged between the two ends of each support 31. A conveying belt 33 is overlapped between the two transmission rollers 32. The pole piece fixing device 4 fixes the negative pole piece treated by the pretreatment water tank 1 on the conveying belt 33. The transmission roller 32 is driven by a driving source, which can be a driving motor cooperating with a belt. The driving source is selected from the prior art and is not shown in the figure. During operation, the controller 7 controls the start and stop of the driving source. The driving source drives the transmission roller 32 to rotate, and the transmission roller 32 drives the conveying belt 33 to move. The negative pole piece fixed on the conveying belt 33 is conveyed to the lower side of the spraying mechanism 5 through the movement of the conveying belt 33.

[0038] Further, please refer to Figure 3 In the embodiment, a plurality of supporting rods 34 are uniformly arranged on the two supports 31. A supporting sub-roller 35 is rotatably connected to the top of the two supporting rods 34. The supporting sub-roller 35 is used to support the conveying belt 33 and improve the stability of the conveying belt 33 during movement.

[0039] Please refer to Figure 3 In the embodiment, the pole piece fixing device 4 includes a horizontal plate 41, a vertical plate 42 and a fixing bolt 43. The horizontal plate 41 is fixedly arranged on the top surface of the conveying belt 33. A plurality of vertical plates 42 are uniformly arranged on the horizontal plate 41 through the fixing bolt 43. The vertical plate 42 and the horizontal plate 41 cross each other. In use, the negative pole piece treated by the pretreatment water tank 1 is fixed under the vertical plate 42. Generally, two negative pole pieces are fixed between three vertical plates 42. The distance between the vertical plates 42 and the number of vertical plates 42 are determined according to the size of the negative pole piece.

[0040] Please refer to Figure 1As shown, in the present embodiment, the spraying mechanism 5 comprises support plates 51, a spraying pipeline 52 and spray heads 53. Two support plates 51 are fixedly arranged on the two brackets 31 respectively, and during installation, the support plates 51 are ensured not to contact the conveying belt 33. The spraying pipeline 52 is erected on the top ends of the two brackets 31, and the spraying pipeline 52 is in communication with an external water source. A plurality of spray heads 53 are uniformly arranged on the spraying pipeline 52, and the spray heads 53 are in communication with the inside of the spraying pipeline 52. Through the precise design of the spray heads 53, the water flow sprayed by the spray heads 53 can accurately act on the surface of the negative plate, and the water pressure of the water flow sprayed by the spray heads 53 needs to ensure that the graphite particles are completely stripped. At the same time that the graphite is washed down, the water flow will guide it into the recovery water tank 2. At the same time, the copper foil, due to its strong adhesion, will not be washed down by the water flow, but will be effectively transported to the top end of the conveying belt 33 for recovery treatment.

[0041] Please refer to Figure 4 As shown, in the present embodiment, the recovery liquid treatment system 6 comprises a centrifuge, a water circulation system and a graphite wet material treatment system. The liquid mixture containing graphite wet material in the recovery water tank 2 enters the centrifuge through the liquid outlet 21 at the bottom of the side of the recovery water tank 2. The centrifuge separates the liquid and the solid by high-speed rotation, finally separates the wet graphite material from the liquid, and the separated liquid enters the water circulation system for treatment and is then transported to the spraying mechanism 5 for recycling. The separated solid graphite wet material enters the graphite wet material treatment system for further drying treatment or other process treatment, and is converted into high-quality graphite powder.

[0042] It should be noted that the conveying mechanism 3, the plate fixing device 4 and the spraying mechanism 5 are all made of waterproof materials.

[0043] Method for use:

[0044] Firstly, the negative plate is placed into the pretreatment water tank 1 for soaking to dissolve the water-soluble adhesive attached to the negative plate, so as to effectively reduce the adhesion between the graphite and the copper foil.

[0045] After soaking, the plate fixing device 4 fixes the negative plate treated by the pretreatment water tank 1 on the conveying belt 33 to prevent deviation or damage in the subsequent treatment process.

[0046] Subsequently, the negative plate is driven by the conveying belt 33 and conveyed upwards along a predetermined track to enter the next treatment link, and the negative plate is conveyed to the position below the spraying mechanism 5 by the movement of the conveying belt 33.

[0047] The water flow sprayed by the spray heads 53 of the spraying mechanism 5 can accurately act on the surface of the negative plate, ensuring that the graphite particles are completely stripped. At the same time that the graphite is washed down, the water flow will guide it into the recovery water tank 2. At the same time, the copper foil, due to its strong adhesion, will not be washed down by the water flow, but will be effectively transported to the top end of the conveying belt 33 for recovery treatment.

[0048] The liquid mixture containing graphite wet material is introduced into the centrifugal machine through the liquid discharge pipe, the centrifugal machine separates the liquid and solid by high-speed rotation, finally separates the wet graphite material from the liquid, the separated liquid is introduced into the water circulation system, treated and delivered to the spraying mechanism 5 for recycling, and the water circulation system ensures efficient recycling of water resources and maximally reduces water waste.

[0049] The separated solid graphite wet material is introduced into the graphite wet material processing system for further drying treatment or other process treatment, and is converted into high-quality graphite powder.

[0050] The above describes the preferred embodiments of the present application, which should not be considered as limiting the scope of the present application. Any equivalent changes and improvements within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. An integrated apparatus for separating graphite and copper foil on a lithium-ion battery negative electrode sheet, characterized by: The system includes a pretreatment water tank (1), a recovery water tank (2), a conveying mechanism (3), an electrode fixing device (4), a spraying mechanism (5), and a recovery liquid treatment system (6). The conveying mechanism (3) is located on top of the recovery water tank (2), and the electrode fixing device (4) is located on the conveying mechanism (3). The electrode fixing device (4) is used to fix the negative electrode sheet treated in the pretreatment water tank (1) onto the conveying mechanism (3). The conveying mechanism (3) is used to hold the electrode sheet fixed on the conveying mechanism (6). The negative electrode sheet is conveyed to the bottom of the spraying mechanism (5). The spraying mechanism (5) is fixedly installed above the side of the conveying mechanism (3) away from the pretreatment water tank (1). The water sprayed by the spraying mechanism (5) peels off the graphite particles on the negative electrode sheet. The graphite particles are recycled back to the recycling water tank (2) with the water flow. The recycling liquid treatment system (6) is connected to the recycling water tank (2). The recycling liquid treatment system (6) is used to treat the liquid mixture containing graphite wet material recycled to the recycling water tank (2).

2. The integrated device for separating graphite and copper foil on a lithium-ion battery negative electrode sheet according to claim 1, characterized in that: The conveying mechanism (3) includes a bracket (31), two brackets (31) are fixedly installed on the top two sides of the recycling tank (2), and a transmission roller (32) is rotatably installed between the two ends of the two brackets (31). A conveyor belt (33) is connected between the two transmission rollers (32), and the transmission rollers (32) are driven by a drive source.

3. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 2, characterized in that: Both of the brackets (31) are evenly provided with a number of support rods (34), and a support sub-roller (35) is rotatably connected to the top of the two support rods (34). The support sub-roller (35) is used to support the conveyor belt (33).

4. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 2, characterized in that: The electrode fixing device (4) includes a horizontal plate (41), a vertical plate (42) and fixing bolts (43). The horizontal plate (41) is fixedly installed on the top surface of the conveyor belt (33). A plurality of vertical plates (42) are evenly distributed on the horizontal plate (41) by the fixing bolts (43). The vertical plates (42) and the horizontal plate (41) are intersected in a cross shape.

5. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 2, characterized in that: The spraying mechanism (5) includes a support plate (51), a spraying pipe (52), and a nozzle (53). The two support plates (51) are respectively fixed on the two brackets (31). The spraying pipe (52) is mounted on the top of the two brackets (31). A number of nozzles (53) are evenly distributed on the spraying pipe (52). The nozzles (53) are connected to the inside of the spraying pipe (52).

6. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 1, characterized in that: The recovery liquid treatment system (6) includes a centrifuge, a water circulation system and a graphite wet material treatment system. The centrifuge is connected to the recovery water tank (2). The centrifuge performs solid-liquid separation on the liquid mixture containing graphite wet material in the recovery water tank (2). The separated liquid enters the water circulation system for treatment and is then transported to the spraying mechanism (5) for recycling. The separated solid graphite wet material enters the graphite wet material treatment system for processing into graphite powder.

7. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 1, characterized in that: The conveying mechanism (3), the pole piece fixing device (4) and the spraying mechanism (5) are made of waterproof material.

8. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 1, characterized in that: An opening is arranged on the top of the pretreatment water tank (1), and a drain port is arranged on the bottom of the side of the pretreatment water tank (1).

9. The integrated device for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 1, characterized in that: The conveying mechanism (3) is arranged above the opening arranged on the top of the recovery water tank (2), and the recovery liquid treatment system (6) is communicated with the liquid outlet (21) arranged on the bottom of the side of the recovery water tank (2).

10. The integrated apparatus for separating graphite and copper foil on a lithium-ion battery anode sheet according to claim 1, characterized in that: A controller (7) is further arranged, which is at least in communication connection with the conveying mechanism (3), the spraying mechanism (5) and the recovery liquid treatment system (6).

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