A lithium ion battery negative electrode material recycling device

Abstract

The application belongs to the technical field of battery recycling, and particularly relates to a lithium ion battery negative electrode material recycling device, which comprises a cylinder, a clamping mechanism arranged above the cylinder, a rotating mechanism connected to the clamping mechanism, a scraping mechanism arranged in the cylinder, an inlet arranged at the edge of the cylinder, a pair of clamping heads of the clamping mechanism extending into the cylinder, the scraping mechanism comprising an electric push rod located behind the clamping head and a scraper, the electric push rod being fixedly connected to the cylinder, and the scraper being fixedly connected to the output shaft of the electric push rod, and further comprising: a pressure acquisition module installed at the position where the scraper and the electric push rod are connected; and a residual material acquisition module installed on the outer wall of the scraper. In the application, the clamping mechanism and the rotating mechanism are used to tightly wind the electrode sheet after heat treatment, so that the electrode material is extruded and falls off during the bending and winding process, and the scraping mechanism further scrapes off the residual material, thereby greatly improving the recycling efficiency of the electrode material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery recycling, and particularly relates to a lithium ion battery negative electrode material recycling device. BACKGROUND

[0002] Lithium ion batteries, as an important energy storage device, have been widely used in modern society. With the increasing use of lithium ion batteries, the number of waste lithium ion batteries is also growing. If these waste batteries are not properly disposed of, not only will it cause resource waste, but also may cause serious environmental pollution. Therefore, the recycling of lithium ion battery negative electrode materials becomes crucial.

[0003] Currently, there are some problems in the recycling process of lithium ion battery negative electrode materials. For example, the traditional recycling method may not be able to efficiently separate the electrode material from the electrode sheet, resulting in low recycling efficiency. Moreover, during the separation process, the electrode material may be damaged, affecting its recycling quality. In view of these problems, the present application proposes a lithium ion battery negative electrode material recycling device, aiming to improve the recycling efficiency and quality, and realize precise control of the recycling process. SUMMARY

[0004] Based on the technical problems existing in the prior art, the present application proposes a lithium ion battery negative electrode material recycling device.

[0005] The lithium ion battery negative electrode material recycling device provided by the application comprises a cylinder, a clamping mechanism is arranged above the cylinder, the clamping mechanism is connected with a rotating mechanism, a scraping mechanism is arranged in the cylinder, an inlet is arranged at the edge of the cylinder, a pair of clamping heads of the clamping mechanism extends into the cylinder, the scraping mechanism comprises an electric push rod located behind the clamping head and a scraper, the electric push rod is fixedly connected to the cylinder, the scraper is fixedly connected to the output shaft of the electric push rod, and the device further comprises: a pressure acquisition module installed at the position where the scraper and the electric push rod are connected, which is used for monitoring the pressure fluctuation when the scraper contacts the electrode sheet in real time and generating a pressure fluctuation coefficient through a control module; a residual acquisition module installed on the outer wall of the scraper, which is used for monitoring the residual amount of the electrode sheet surface material in real time and generating a residual density coefficient through the control module; one end of the electrode sheet after heat treatment is inserted into the cylinder from the inlet, then the clamping mechanism drives the two clamping heads to clamp the end of the electrode sheet, and then the rotating mechanism drives the clamping mechanism to rotate, so that the electrode sheet is tightly wound on the two clamping heads in a circle. Since the electrode sheet is heat-treated, the adhesion between the electrode material and the electrode sheet current collector metal sheet is weakened, so that the electrode material on the surface of the electrode sheet is extruded and falls off from the surface of the electrode sheet during the bending and winding of the electrode sheet, and falls into the cylinder. Moreover, the electric push rod drives the scraper to tightly contact the surface of the electrode sheet during the winding process, and further scrapes the electrode material, and the control module comprehensively analyzes the generated pressure fluctuation coefficient and residual density coefficient to generate an evaluation coefficient, so as to determine whether the scraping mechanism needs to strengthen the scraping intensity of the electrode sheet. The evaluation coefficient is compared with a pre-set evaluation coefficient reference threshold value, and the working state of the rotating mechanism and the scraping mechanism is controlled according to the comparison result.

[0006] Preferably, the clamping mechanism further comprises a clamp seat, a pair of clamping heads are slidingly connected to the bottom end of the clamp seat, a motor one is fixedly connected to the top end of the clamp seat, a connecting shaft is connected to the output shaft of the motor one, a pair of bearing seats are installed in the clamp seat, a bidirectional screw rod is rotatably connected between the two bearing seats, the bidirectional screw rod is threadedly connected with the two clamping heads, and a pair of bevel gears meshed together are respectively installed on the connecting shaft and the bidirectional screw rod; the motor one drives the connecting shaft to rotate, then the connecting shaft drives the bidirectional screw rod to rotate through the meshing transmission of the two bevel gears, then the bidirectional screw rod drives the two clamping heads to move close to each other, so as to clamp the electrode sheet, and vice versa, the bidirectional screw rod drives the two clamping heads to move away from each other, so as to release the electrode sheet.

[0007] Preferably, the rotating mechanism comprises a gear ring rotatably connected to the top end of the cylinder, a circular frame is fixedly connected to the top of the gear ring and fixedly connected with the clamp seat, a motor two is fixedly connected to the circumferential outer wall of the cylinder through a bottom plate, a gear is connected to the output shaft of the motor two, and the gear is meshedly connected with the gear ring; the motor two drives the gear to rotate through the output shaft, then the gear drives the gear ring to rotate through meshing, and the gear ring drives the clamping mechanism to rotate through the circular frame, so as to tightly wind the electrode sheet.

[0008] Preferably, the bottom end of the barrel is provided with a discharge tank, and a detachable pipe cover is installed at the bottom end of the discharge tank; the electrode material collected in the barrel can be taken out from the discharge tank by opening the pipe cover.

[0009] Preferably, the output end and the input end of the pressure collection module and the output end and the input end of the residual collection module are respectively electrically connected with the input end and the output end of the control module, and the output end of the control module is respectively electrically connected with the input end of the electric push rod, the input end of the motor one and the input end of the motor two.

[0010] Preferably, the execution steps of the control module for controlling the working state of the rotating mechanism and the scraping mechanism according to the comparison result are as follows:

[0011] Initialization: set the initial scraping tool pressure, the clamping mechanism rotating speed, the weight coefficient and the reference threshold Epg;

[0012] Real-time detection: the residual collection module collects the residual amount of the electrode material on the electrode sheet surface; the pressure collection module collects the pressure when the scraping tool contacts the electrode sheet;

[0013] Coefficient calculation: the control module calculates the pressure fluctuation coefficient, the residual density coefficient and the evaluation coefficient;

[0014] Dynamic adjustment: if EpgEop: maintain the current parameters; if Epg≥Eop: increase the scraping tool pressure and reduce the clamping rotating speed.

[0015] Preferably, the generation logic of the pressure fluctuation coefficient is as follows:

[0016] S1, the actual pressure of the scraping tool contacting the electrode sheet at different time within T time when the electrode material on the electrode sheet surface is scraped by the scraping mechanism is obtained by the pressure collection module, and the actual pressure obtained at the nth time within T time is marked as ;

[0017] S2, the pressure fluctuation coefficient is calculated, and the expression for calculation is as follows:

[0018]

[0019] In the formula, is the average pressure within T time; k is the pressure sampling number within T time.

[0020] Preferably, the generation logic of the residual density coefficient is as follows:

[0021] S1, the actual residual amount of the electrode material on the electrode sheet surface within T time when the electrode material on the electrode sheet surface is scraped by the scraping mechanism is obtained by the residual collection module, and the actual residual amount obtained at the mth time within T time is marked as ;

[0022] S2, calculating the residual density coefficient, the expression of the calculation is:

[0023]

[0024] In the formula, t is the sampling number in T time.

[0025] Preferably, the formula analysis is performed by the control module according to the formula:

[0026]

[0027] Epg is the evaluation coefficient, and α and β are preset weight coefficients of pressure and residual density, and α+β=1.

[0028] Compared with the prior art, the lithium ion battery negative electrode material recycling device has the following beneficial effects:

[0029] 1. A lithium ion battery negative electrode material recycling device, which uses a clamping mechanism and a rotating mechanism to tightly wrap the electrode sheet after heat treatment, so that the electrode material is extruded and falls off during the bending and tightening process, and a scraping mechanism further scrapes off the residual material, greatly improving the recycling efficiency of the electrode material.

[0030] 2. A lithium ion battery negative electrode material recycling device, which is provided with a pressure collection module and a residual material collection module, which can monitor the pressure fluctuation when the scraper contacts the electrode sheet and the residual amount of the electrode sheet surface material in real time, and generate corresponding coefficients through the control module for comprehensive analysis, and accurately control the working state of the rotating mechanism and the scraping mechanism according to the comparison result, to ensure the stability and consistency of the recycling effect.

[0031] 3. A lithium ion battery negative electrode material recycling device, which controls the pressure fluctuation coefficient and the residual density coefficient according to the preset weight coefficient and the reference threshold value, automatically adjusts the scraper pressure and the clamp rotating speed, realizes intelligent control of the recycling process, reduces manual intervention, and improves work efficiency and recycling quality. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A system block diagram of a lithium ion battery negative electrode material recycling device is provided for the present application;

[0033] Figure 2 A schematic diagram of the overall structure of a lithium ion battery negative electrode material recycling device is provided for the present application;

[0034] Figure 3 A schematic diagram of the internal structure of a lithium ion battery negative electrode material recycling device is provided for the present application;

[0035] Figure 4 A schematic diagram of the internal structure of a cylinder of a lithium ion battery negative electrode material recycling device is provided in the present application;

[0036] Figure 5 A schematic diagram of the internal structure of a clamping mechanism of a lithium ion battery negative electrode material recycling device is provided in the present application;

[0037] Figure 6 A schematic diagram of the internal structure of a clamping mechanism of a lithium ion battery negative electrode material recycling device is provided in the present application; Figure 4 A schematic diagram of the internal structure of a clamping mechanism of a lithium ion battery negative electrode material recycling device is provided in the present application.

[0038] In the figure: 1, cylinder; 2, inlet; 3, chuck; 4, electric push rod; 5, scraper; 6, pressure acquisition module; 7, residual material acquisition module; 8, control module; 9, clamp seat; 10, motor one; 11, connecting shaft; 12, two-way screw; 13, bevel gear; 14, bearing seat; 15, round frame; 16, gear ring; 17, bottom plate; 18, motor two; 19, gear; 20, discharge tank; 21, pipe cover. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all.

[0040] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] Referring to Figures 1-6 A lithium ion battery negative electrode material recycling device, comprising a cylinder 1, a clamping mechanism is provided above the cylinder 1, the clamping mechanism is connected with a rotating mechanism, a scraping mechanism is provided inside the cylinder 1, an inlet 2 is provided at the edge of the cylinder 1, a pair of chucks 3 of the clamping mechanism extends into the cylinder 1, the scraping mechanism includes an electric push rod 4 behind the chuck 3 and a scraper 5, the electric push rod 4 is fixedly connected to the cylinder 1, the scraper 5 is fixedly connected to the output shaft of the electric push rod 4, and further comprising:

[0042] A pressure acquisition module 6 is installed at the position where the scraper 5 and the electric push rod 4 are connected, for real-time monitoring of the pressure fluctuation when the scraper 5 contacts the electrode sheet, and generating a pressure fluctuation coefficient through the control module 8;

[0043] The residue collection module 7 is installed on the outer wall of the scraper 5, which is used to monitor the residue amount of the electrode sheet surface material in real time and generate a residue density coefficient through the control module 8.

[0044] It should be noted that the pressure collection module 6 can be a pressure sensor or other device capable of monitoring the pressure fluctuation when the scraper 5 contacts the electrode sheet, the residue collection module 7 can be an infrared spectrum sensor or other device capable of monitoring the residue amount of the electrode sheet surface material in real time, and the control module 8 is an embedded controller (such as STM32 series) integrated with a data fusion algorithm, so the pressure collection module 6, the residue collection module 7 and the control module 8 are not specifically limited here and can be selected according to actual needs.

[0045] In use, one end of the heat-treated electrode sheet is inserted into the cylinder 1 from the inlet 2, and then the clamping mechanism drives the two clamps 3 to clamp the end of the electrode sheet. Then the rotating mechanism drives the clamping mechanism to rotate, so that the electrode sheet is tightly wound on the two clamps 3 one turn after another. Since the electrode sheet has been heat-treated, the adhesion between the electrode material and the electrode sheet current collector metal sheet is weakened, so that the electrode material on the surface of the electrode sheet is extruded and falls off from the surface of the electrode sheet and falls into the cylinder 1 during the bending and tightening of the electrode sheet. Moreover, the electric push rod 4 drives the scraper 5 to tightly adhere to the surface of the electrode sheet, further scraping the electrode material. During this period, the control module 8 comprehensively analyzes the generated pressure fluctuation coefficient and residue density coefficient to generate an evaluation coefficient, judges whether the scraping mechanism needs to strengthen the scraping intensity of the electrode sheet, compares the evaluation coefficient with the pre-set evaluation coefficient reference threshold value, and controls the working state of the rotating mechanism and the scraping mechanism according to the comparison result.

[0046] The clamping mechanism further includes a clamp seat 9, a pair of clamps 3 are slidingly connected to the bottom end of the clamp seat 9, a motor 10 is fixedly connected to the top end of the clamp seat 9, a connecting shaft 11 is connected to the output shaft of the motor 10, a pair of bearing seats 14 are installed in the clamp seat 9, a bidirectional screw rod 12 is rotatably connected between the two bearing seats 14, the bidirectional screw rod 12 is threadedly connected with the two clamps 3, and a pair of bevel gears 13 are engagedly connected to the connecting shaft 11 and the bidirectional screw rod 12;

[0047] In use, the motor 10 drives the connecting shaft 11 to rotate, and then the connecting shaft 11 drives the bidirectional screw rod 12 to rotate through the engagement transmission of the two bevel gears 13, and then the bidirectional screw rod 12 drives the two clamps 3 to move closer to each other to realize the clamping action of the electrode sheet. Conversely, the two clamps 3 are driven to move away from each other by the bidirectional screw rod 12 to release the electrode sheet.

[0048] The rotating mechanism comprises a gear ring 16 rotatably connected to the top end of the cylinder 1, the gear ring 16 is fixedly connected with a circular frame 15 which is fixed with the clamp seat 9, the outer wall of the cylinder 1 is fixedly connected with a motor 2 through a bottom plate 17, the output shaft of the motor 2 is connected with a gear 19, and the gear 19 is in meshing connection with the gear ring 16.

[0049] In use, the gear 19 is driven to rotate by the output shaft of the motor 2, then the gear 19 drives the gear ring 16 to rotate, and the gear ring 16 drives the clamping mechanism to rotate through the circular frame 15, so that the electrode sheet is tightly wound.

[0050] The bottom end of the cylinder 1 is provided with a discharge tank 20, and the bottom end of the discharge tank 20 is provided with a detachable pipe cover 21.

[0051] In use, the pipe cover 21 is opened, and the electrode material collected in the cylinder 1 can be taken out from the discharge tank 20.

[0052] The output end and the input end of the pressure collecting module 6 and the output end and the input end of the residual collecting module 7 are electrically connected with the input end and the output end of the control module 8 respectively, and the output end of the control module 8 is electrically connected with the input end of the electric push rod 4, the input end of the motor 1 and the input end of the motor 2 respectively.

[0053] In another embodiment, through the cooperation of the pressure collecting module 6, the residual collecting module 7 and the control module 8, the control module 8 comprehensively analyzes the generated pressure fluctuation coefficient and residual density coefficient to generate an evaluation coefficient, judges whether the scraping mechanism needs to strengthen the scraping force on the electrode sheet, compares the evaluation coefficient with a pre-set evaluation coefficient reference threshold value, and controls the working state of the rotating mechanism and the scraping mechanism according to the comparison result.

[0054] Initialization: set the initial scraper 5 pressure, the clamping mechanism rotating speed, the weight coefficient and the reference threshold value Eop;

[0055] Real-time detection: the residual collecting module 7 collects the residual amount of the electrode sheet surface material; the pressure collecting module 6 collects the pressure when the scraper 5 contacts with the electrode sheet;

[0056] Coefficient calculation: the control module 8 calculates the pressure fluctuation coefficient, the residual density coefficient and the evaluation coefficient;

[0057] Dynamic adjustment: if Epg < Eop: maintain the current parameters; if Epg ≥ Eop: increase the scraper pressure and reduce the clamp rotating speed.

[0058] The pressure fluctuation coefficient reflects the difference between the pressure of the scraper 5 in contact with the electrode sheet at the initial time and the pressure of the scraper 5 in contact with the electrode sheet at different times within T time. The greater the fluctuation, the stronger the material adhesion or the insufficient pressure of the scraper, indicating that the material scraping strength of the material scraping mechanism on the electrode sheet does not meet the normal cleaning, and vice versa.

[0059] The generation logic of the pressure fluctuation coefficient is:

[0060] S1, acquire the actual pressure of the scraper 5 in contact with the electrode sheet at different times within T time when the material scraping mechanism scrapes the electrode material on the surface of the electrode sheet through the pressure acquisition module 6, and mark the actual pressure acquired at the nth time within T time as ;

[0061] S2, calculate the pressure fluctuation coefficient, and the expression for calculation is:

[0062]

[0063] In the formula, is the average pressure within T time; k is the pressure sampling number within T time.

[0064] The residual density coefficient reflects the difference between the residual amount of the electrode material on the surface of the electrode sheet at the initial time and the residual amount of the electrode material on the surface of the electrode sheet at different times within T time. The lower the residual density, the smaller the coefficient, indicating that the material scraping strength of the material scraping mechanism on the electrode sheet can meet the normal cleaning, and vice versa.

[0065] The generation logic of the residual density coefficient is:

[0066] S1, acquire the actual residual amount of the electrode material on the surface of the electrode sheet at different times within T time when the material scraping mechanism scrapes the electrode material on the surface of the electrode sheet through the residual acquisition module 7, and mark the actual residual amount acquired at the mth time within T time as ;

[0067] S2, calculate the residual density coefficient, and the expression for calculation is:

[0068]

[0069] In the formula, t is the sampling number within T time.

[0070] The formula is analyzed by the control module 8, according to the formula:

[0071]

[0072] Epg is an evaluation coefficient, and a and β are preset weight coefficients of pressure and residual density, a+β=1, and the greater the value of Epg, the greater the pressure of the scraper 5 or the lower the speed of the clamping mechanism.

[0073] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A lithium-ion battery negative electrode material recycling device, comprising a cylindrical body (1), characterized in that, A clamping mechanism is provided above the cylinder (1), and a rotating mechanism is connected to the clamping mechanism. A scraping mechanism is provided inside the cylinder (1). An inlet (2) is provided at the edge of the cylinder (1). A pair of clamps (3) of the clamping mechanism extend into the cylinder (1). The scraping mechanism includes an electric push rod (4) and a scraper (5) located behind the clamps (3). The electric push rod (4) is fixedly connected to the cylinder (1), and the scraper (5) is fixedly connected to the output shaft of the electric push rod (4). The mechanism also includes: The pressure acquisition module (6) is installed at the connection between the scraper (5) and the electric push rod (4). The pressure acquisition module (6) acquires the actual pressure at different times within time T when the scraper (5) contacts the electrode sheet during the scraping mechanism's removal of electrode material from the electrode sheet surface. The actual pressure acquired at time n within time T is calibrated as... Calculate the pressure fluctuation coefficient: In the formula, Let k be the average pressure over time T; k is the number of pressure samples taken over time T. The residue collection module (7) is installed on the outer wall of the scraper (5). The module (7) acquires the actual amount of residual electrode material on the electrode surface at different times within time T when the scraping mechanism removes the electrode material from the electrode sheet. The actual residual amount acquired at time m within time T is calibrated as... Calculate the residual density coefficient: In the formula, t represents the number of samples within time T; The control module (8) performs a comprehensive analysis of the generated pressure fluctuation coefficient and residual density coefficient to generate an evaluation coefficient based on the formula: α and β are preset weighting coefficients for pressure and residual density, α + β = 1. The evaluation coefficients are compared with the preset evaluation coefficient reference thresholds, and the working status of the rotating mechanism and the scraping mechanism is controlled according to the comparison results.

2. The lithium-ion battery negative electrode material recycling device according to claim 1, characterized in that, The clamping mechanism also includes a clamp seat (9), a pair of chucks (3) are slidably connected to the bottom end of the clamp seat (9), a motor (10) is fixedly connected to the top end of the clamp seat (9), the output shaft of the motor (10) is connected to a connecting shaft (11), a pair of bearing seats (14) are installed inside the clamp seat (9), a two-way lead screw (12) is rotatably connected between the two bearing seats (14), the two-way lead screw (12) is threadedly connected to the two chucks (3), and bevel gears (13) that mesh together are respectively installed on the connecting shaft (11) and the two-way lead screw (12).

3. The lithium-ion battery negative electrode material recycling device according to claim 2, characterized in that, The rotating mechanism includes a gear ring (16) rotatably connected to the top of the cylinder (1), a circular frame (15) fixedly connected to the top of the gear ring (16) and fixed together with the clamp seat (9), and a motor (18) fixedly connected to the outer circumference of the cylinder (1) through the bottom plate (17), and a gear (19) connected to the output shaft of the motor (18), and the gear (19) meshing with the gear ring (16).

4. The lithium-ion battery negative electrode material recycling device according to claim 1, characterized in that, The bottom end of the cylinder (1) is provided with a discharge tank (20), and the bottom end of the discharge tank (20) is equipped with a detachable pipe cover (21).

5. A lithium-ion battery negative electrode material recycling device according to claim 3, characterized in that, The output and input ends of the pressure acquisition module (6) and the output and input ends of the residue acquisition module (7) are electrically connected to the input and output ends of the control module (8), respectively. The output end of the control module (8) is electrically connected to the input end of the electric push rod (4), the input end of motor one (10), and the input end of motor two (18), respectively.

6. A lithium-ion battery negative electrode material recycling device according to claim 1, characterized in that, The control module (8) executes the following steps to control the working state of the rotating mechanism and the scraping mechanism based on the comparison results: Initialization: Set the initial scraper (5) pressure, clamping mechanism speed, weighting coefficient, and reference threshold Eop; Real-time detection: The residue collection module (7) collects the amount of residual material on the surface of the electrode sheet; the pressure collection module (6) collects the pressure when the scraper (5) contacts the electrode sheet; Coefficient calculation: The control module (8) calculates the pressure fluctuation coefficient, residual density coefficient and evaluation coefficient; Dynamic adjustment: If Epg < Eop: Maintain the current parameters; if Epg ≥ Eop: Increase the scraper pressure and decrease the fixture speed.

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