Lithium ion battery negative electrode material recycling device

Abstract

The invention 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 is arranged above the cylinder and connected with a rotating mechanism, a scraping mechanism is arranged in the cylinder, an inlet is formed in the edge of the cylinder, a pair of chucks of the clamping mechanism extend into the cylinder, and the rotating mechanism is connected with the clamping mechanism. The scraping mechanism comprises an electric push rod and a scraper which are located behind the chuck, the electric push rod is fixedly connected to the barrel, the scraper is fixedly connected to an output shaft of the electric push rod, and the pressure collecting module is installed at the position where the scraper is connected with the electric push rod; and the residue collecting module is mounted on the outer wall of the scraper. According to the electrode material recycling device, electrode plates subjected to heat treatment are tightly wound through the clamping mechanism and the rotating mechanism, so that electrode materials are extruded to fall off in the bending and tight winding process, meanwhile, residual materials are further scraped away through the scraping mechanism, and the recycling efficiency of the electrode materials is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery recycling, and in particular to a device for recycling negative electrode materials of lithium-ion batteries. Background Art

[0002] As an important energy storage device, lithium-ion batteries have been widely used in modern society. As their usage continues to increase, the number of waste lithium-ion batteries is also increasing. If these waste batteries are not properly handled, it will not only cause a waste of resources, but also may cause serious pollution to the environment. Therefore, the recycling of lithium-ion battery negative electrode materials has become very important.

[0003] At present, there are some problems in the recycling process of negative electrode materials of lithium-ion batteries. For example, traditional recycling methods may not be able to efficiently separate electrode materials from electrode sheets, resulting in low recycling efficiency. Moreover, during the separation process, the electrode materials may be damaged, affecting their recycling quality. In view of these problems, the present invention proposes a recycling device for negative electrode materials of lithium-ion batteries, which aims to improve the recycling efficiency and quality and realize precise control of the recycling process. Summary of the invention

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

[0005] A device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention includes a cylinder body. A clamping mechanism is arranged above the cylinder body. The clamping mechanism is connected to a rotating mechanism. A scraping mechanism is arranged inside the cylinder body. An inlet is provided at the edge of the cylinder body. A pair of clamping heads of the clamping mechanism extend into the cylinder body. The scraping mechanism includes an electric push rod and a scraper located behind the clamping head. The electric push rod is fixedly connected to the cylinder body, and the scraper is fixedly connected to the output shaft of the electric push rod. It also includes: a pressure acquisition module installed at the position where the scraper and the electric push rod are connected, used to monitor the pressure fluctuation when the scraper contacts the electrode sheet in real time, and generate a pressure fluctuation coefficient through the control module; a residue acquisition module installed on the outer wall of the scraper, used to monitor the residual amount of the material on the surface of the electrode sheet in real time, and generate a residual density coefficient through the control module. One end of the heat-treated electrode sheet is inserted into the cylinder body from the inlet, and then the clamping mechanism drives the two clamping heads to clamp the end of the electrode sheet. Then the rotating mechanism drives the clamping mechanism to rotate, so that the electrode sheet will be wound around the two clamping heads one by one. Since the electrode sheet has been heat-treated, the bonding effect between the electrode material and (the current collector metal sheet of the electrode sheet) is weakened. Therefore, during the process of bending and winding the electrode sheet, the electrode material on the surface will be extruded and fall off from the surface of the electrode sheet and into the cylinder body. Moreover, during the winding process, the electric push rod drives the scraper to closely adhere to the surface of the electrode sheet to further scrape off the electrode material. During this period, the control module 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 preset evaluation coefficient reference threshold, and controls the working states of the rotating mechanism and the scraping mechanism according to the comparison result.

[0006] Preferably, the clamping mechanism further includes a fixture seat. A pair of clamping heads are slidably connected to the bottom end of the fixture seat. A motor one is fixedly connected to the top end of the fixture seat. The output shaft of the motor one is connected to a connecting shaft. A pair of bearing seats are installed inside the fixture seat. A bidirectional lead screw is rotatably connected between the two bearing seats. The bidirectional lead screw is threadedly connected to the two clamping heads. Bevel gears meshing with each other are respectively installed on the connecting shaft and the bidirectional lead screw. The motor one drives the connecting shaft to rotate, and then the connecting shaft drives the bidirectional lead screw to rotate through the meshing transmission of the two bevel gears. Then the bidirectional lead screw drives the two clamping heads to approach each other to realize the clamping action on the electrode sheet. On the contrary, the two clamping heads are driven by the bidirectional lead screw to move away from each other to release the electrode sheet.

[0007] Preferably, the rotating mechanism includes a toothed ring rotatably connected to the top end of the cylinder body. A circular frame fixedly connected to the fixture seat is fixedly connected to the top of the toothed ring. A motor two is fixedly connected to the circumferential outer wall of the cylinder body through a bottom plate. The output shaft of the motor two is connected to a gear. The gear is meshed with the toothed ring. The output shaft of the motor two drives the gear to rotate, and then the gear drives the toothed ring to rotate through meshing. The toothed ring will drive the clamping mechanism to rotate through the circular frame to realize the winding of the electrode sheet.

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

[0009] Preferably, the output end and the input end of the pressure acquisition module, and the output end and the input end of the residue acquisition module are respectively electrically connected to the input end and the output end of the control module, and the output end of the control module is respectively electrically connected to the input end of the electric push rod, the input end of the first motor, and the input end of the second motor.

[0010] Preferably, the steps for the control module to control the working states of the rotating mechanism and the scraping mechanism according to the comparison result are as follows: Initialization: Set the initial scraper pressure, the rotation speed of the clamping mechanism, the weight coefficient, and the reference threshold ; Real-time detection: The residue acquisition module acquires the residual amount of the surface material of the electrode sheet; the pressure acquisition module acquires the pressure when the scraper contacts the electrode sheet. Coefficient calculation: The control module calculates the pressure fluctuation coefficient, the residual density coefficient, and the evaluation coefficient. Dynamic adjustment: If : Maintain the current parameters; if : Increase the scraper pressure and decrease the fixture rotation speed.

[0011] Preferably, the generation logic of the pressure fluctuation coefficient is as follows: S1. Obtain the actual pressure when the scraping mechanism contacts the electrode sheet at different moments within time T when scraping the electrode material on the surface of the electrode sheet through the pressure acquisition module, and calibrate the actual pressure obtained at the nth moment within time T as ; S2. Calculate the pressure fluctuation coefficient, and the calculation expression is: In the formula, is the average pressure within time T; is the number of pressure sampling times within time T.

[0012] Preferably, the generation logic of the residual density coefficient is as follows: S1. Obtain the actual residual amount of the electrode material on the surface of the electrode sheet at different moments within time T when the scraping mechanism scrapes the electrode material on the surface of the electrode sheet through the residue acquisition module, and calibrate the actual residual amount obtained at the mth moment within time T as ; S2. Calculate the residual density coefficient, and the calculation expression is: , where t is the number of sampling times within time T.

[0013] Preferably, through the control module for formulaic analysis, according to the formula: is the evaluation coefficient, and α and β are the preset weight coefficients of pressure and residual density, .

[0014] Compared with the prior art, the present invention provides a device for recycling the negative electrode material of a lithium-ion battery, which has the following beneficial effects: 1. A device for recycling the negative electrode material of a lithium-ion battery uses a clamping mechanism and a rotating mechanism to wind the heat-treated electrode sheet tightly, so that the electrode material is extruded and shed during the bending and winding process. At the same time, the scraping mechanism further scrapes off the residual material, greatly improving the recovery efficiency of the electrode material.

[0015] 2. A device for recycling the negative electrode material of a lithium-ion battery is provided with a pressure acquisition module and a residue acquisition module to monitor the pressure fluctuation when the scraper contacts the electrode sheet and the residual amount of the material on the surface of the electrode sheet in real time, and generates corresponding coefficients through the control module for comprehensive analysis. According to the comparison result, the working states of the rotating mechanism and the scraping mechanism are accurately controlled to ensure the stability and consistency of the recovery effect.

[0016] 3. A device for recycling the negative electrode material of a lithium-ion battery, the control module analyzes the pressure fluctuation coefficient and the residual density coefficient according to the preset weight coefficients and reference thresholds, automatically adjusts the scraper pressure and the clamp rotation speed, realizes the intelligent control of the recovery process, reduces manual intervention, and improves the work efficiency and the recovery quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a system block diagram of a device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention; Figure 2 is an overall structural schematic diagram of a device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention; Figure 3 is an internal structural schematic diagram of a device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention; Figure 4 is an internal structural schematic diagram of the cylinder body of a device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention; Figure 5 is an internal structural schematic diagram of the clamping mechanism of a device for recycling the negative electrode material of a lithium-ion battery proposed by the present invention; Figure 6 For the present invention Figure 4 is an enlarged structural schematic diagram at A.

[0018] In the figure: 1, cylinder body; 2, inlet; 3, chuck; 4, electric push rod; 5, scraper; 6, pressure acquisition module; 7, residue acquisition module; 8, control module; 9, fixture seat; 10, first motor; 11, connecting shaft; 12, bidirectional lead screw; 13, bevel gear; 14, bearing seat; 15, circular frame; 16, gear ring; 17, bottom plate; 18, second motor; 19, gear; 20, discharge tank; 21, pipe cover. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] Refer to Figures 1-6 , a device for recycling negative electrode materials of lithium-ion batteries, including a cylinder body 1, a clamping mechanism is arranged above the cylinder body 1, the clamping mechanism is connected with a rotating mechanism, a scraping mechanism is arranged inside the cylinder body 1, an inlet 2 is arranged at the edge of the cylinder body 1, a pair of chucks 3 of the clamping mechanism extend into the cylinder body 1, the scraping mechanism includes an electric push rod 4 and a scraper 5 behind the chuck 3, the electric push rod 4 is fixedly connected to the cylinder body 1, the scraper 5 is fixedly connected to the output shaft of the electric push rod 4, and further includes: A pressure acquisition module 6, installed at the position where the scraper 5 and the electric push rod 4 are connected, is used to monitor the pressure fluctuation when the scraper 5 contacts the electrode sheet in real time, and generate a pressure fluctuation coefficient through the control module 8; A residue acquisition module 7, installed on the outer wall of the scraper 5, is used to monitor the residual amount of the material on the surface of the electrode sheet in real time, and generate a residual density coefficient through the control module 8; It should be noted that the pressure acquisition module 6 can be a pressure sensor or other devices that can monitor the pressure fluctuation when the scraper 5 contacts the electrode sheet in real time. The residue acquisition module 7 can be an infrared spectrum sensor or other devices that can monitor the residual amount of the material on the surface of the electrode sheet in real time. The control module 8 is an embedded controller (such as the STM32 series) integrated with a data fusion algorithm. Therefore, the pressure acquisition module 6, the residue acquisition module 7, and the control module 8 are not specifically defined here and can be selected according to actual needs; During use, one end of the heat-treated electrode sheet is inserted into the cylinder body 1 from the inlet 2, and then the clamping mechanism drives two chucks 3 to clamp the end of the electrode sheet. Next, the rotating mechanism drives the clamping mechanism to rotate, so that the electrode sheet will be wound tightly around the two chucks 3 one by one. Since the electrode sheet has been heat-treated, the bonding effect between the electrode material and (the current collector metal sheet of the electrode sheet) is weakened. Therefore, during the process of bending and winding the electrode sheet, the electrode material on the surface will be extruded and fall off from the surface of the electrode sheet and into the cylinder body 1. Moreover, during the winding process, the electric push rod 4 drives the scraper 5 to closely adhere to the surface of the electrode sheet to further scrape off the electrode material. During this period, the control module 8 comprehensively analyzes the generated pressure fluctuation coefficient and residual density coefficient to generate an evaluation coefficient, and judges whether the scraping mechanism needs to strengthen the scraping force on the electrode sheet. By comparing the evaluation coefficient with the pre-set evaluation coefficient reference threshold, and according to the comparison result, the working states of the rotating mechanism and the scraping mechanism are controlled.

[0022] Among them, the clamping mechanism further includes a fixture base 9. A pair of chucks 3 are slidably connected to the bottom end of the fixture base 9. A motor 10 is fixedly connected to the top end of the fixture base 9. The output shaft of the motor 10 is connected to a connecting shaft 11. A pair of bearing seats 14 are installed in the fixture base 9. A bidirectional lead screw 12 is rotatably connected between the two bearing seats 14. The bidirectional lead screw 12 is threadedly connected to the two chucks 3. Bevel gears 13 that are meshed with each other are respectively installed on the connecting shaft 11 and the bidirectional lead screw 12. During use, the motor 10 is driven to drive the connecting shaft 11 to rotate. Then, the connecting shaft 11 drives the bidirectional lead screw 12 to rotate through the meshing transmission of the two bevel gears 13. Next, the bidirectional lead screw 12 drives the two chucks 3 to approach each other to realize the clamping action of the electrode sheet. On the contrary, the two chucks 3 are driven by the bidirectional lead screw 12 to move away from each other to release the electrode sheet.

[0023] Among them, the rotating mechanism includes a gear ring 16 rotatably connected to the top end of the cylinder body 1. A circular frame 15 fixedly connected to the fixture base 9 is fixedly connected to the top of the gear ring 16. A motor 18 is fixedly connected to the circumferential outer wall of the cylinder body 1 through a bottom plate 17. The output shaft of the motor 18 is connected to a gear 19. The gear 19 is meshed with the gear ring 16. During use, the output shaft of the motor 18 drives the gear 19 to rotate. Then, the gear 19 meshes with and drives the gear ring 16 to rotate. The gear ring 16 will drive the clamping mechanism to rotate through the circular frame 15 to realize the winding of the electrode sheet.

[0024] Among them, a discharge tank 20 is provided at the bottom end of the cylinder body 1. A separable pipe cover 21 is installed at the bottom end of the discharge tank 20. During use, by opening the pipe cover 21, the electrode material collected in the cylinder body 1 can be taken out from the discharge tank 20.

[0025] Among them, the output end and input end of the pressure acquisition module 6, and the output end and input end of the residue acquisition module 7 are electrically connected to the input end and output end 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 the first motor 10, and the input end of the second motor 18 respectively.

[0026] In another embodiment, through the cooperation of the pressure acquisition module 6, the residue acquisition module 7 and the control module 8, the control module 8 comprehensively analyzes the generated pressure fluctuation coefficient and residue density coefficient to generate an evaluation coefficient, and judges whether the scraping mechanism needs to strengthen the scraping force on the electrode sheet. By comparing the evaluation coefficient with a pre-set reference threshold of the evaluation coefficient, and controlling the working states of the rotating mechanism and the scraping mechanism according to the comparison result, the specific implementation steps are as follows: Initialization: Set the initial pressure of the scraper 5, the rotation speed of the clamping mechanism, the weight coefficient and the reference threshold ; Real-time detection: The residue acquisition module 7 acquires the residual amount of the electrode sheet surface material; the pressure acquisition module 6 acquires the pressure when the scraper 5 contacts the electrode sheet. Coefficient calculation: The control module 8 calculates the pressure fluctuation coefficient, the residue density coefficient and the evaluation coefficient; Dynamic adjustment: If : Maintain the current parameters; if : Increase the scraper pressure and decrease the fixture rotation speed.

[0027] Among them, the pressure fluctuation coefficient reflects the difference between the pressure when the scraper 5 contacts the electrode sheet at the initial moment and the pressure when the scraper 5 contacts the electrode sheet at different moments within time T. The greater the fluctuation, the stronger the material adhesion or the insufficient scraper pressure, indicating that the scraping intensity of the scraping mechanism on the electrode sheet does not meet the normal cleaning requirements. On the contrary, it indicates that the scraping intensity of the scraping mechanism on the electrode sheet meets the normal cleaning requirements; The generation logic of the pressure fluctuation coefficient is as follows: S1. Obtain the actual pressure when the scraping mechanism contacts the electrode sheet at different moments within time T during the scraping of the electrode material on the surface of the electrode sheet through the pressure acquisition module 6, and calibrate the actual pressure obtained at the nth moment within time T as ; S2. Calculate the pressure fluctuation coefficient, and the calculation expression is: In the formula, is the average pressure within time T; is the number of pressure samplings within time T.

[0028] Among them, the residual density coefficient reflects the difference between the residual amount of the surface material of the electrode sheet at the initial moment and the residual amount of the surface material of the electrode sheet at different moments within time T. The lower the residual density, the smaller the coefficient, indicating that the scraping intensity of the scraping mechanism on the electrode sheet can meet the normal cleaning requirements. Otherwise, it means that the scraping intensity of the scraping mechanism on the electrode sheet does not meet the normal cleaning requirements; The generation logic of the residual density coefficient is as follows: S1. Obtain the actual residual amount of the electrode material on the surface of the electrode sheet at different moments within time T when the scraping mechanism scrapes the electrode material on the surface of the electrode sheet through the residue acquisition module 7, and calibrate the actual residual amount obtained at the m-th moment within time T as ; S2. Calculate the residual density coefficient, and the calculation expression is: , where t is the number of sampling times within time T.

[0029] Among them, through the control module 8 for formula analysis, according to the formula: is the evaluation coefficient, and α and β are the preset weight coefficients of pressure and residual density, , The larger the value, the more it indicates that the pressure of the scraper 5 needs to be increased or the rotation speed of the clamping mechanism needs to be decreased.

[0030] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A device for recycling a negative electrode material of a lithium-ion battery, comprising a cylinder body (1), characterized in that, Above the cylinder body (1), a clamping mechanism is provided. The clamping mechanism is connected to a rotating mechanism. Inside the cylinder body (1), a scraping mechanism is provided. At the edge of the cylinder body (1), an inlet (2) is provided. A pair of chucks (3) of the clamping mechanism extend into the cylinder body (1). The scraping mechanism includes an electric push rod (4) and a scraper (5) located behind the chuck (3). The electric push rod (4) is fixedly connected to the cylinder body (1), and the scraper (5) is fixedly connected to the output shaft of the electric push rod (4). It further includes: A pressure acquisition module (6), installed at the connection position of the scraper (5) and the electric push rod (4), for real-time monitoring of the pressure fluctuation when the scraper (5) contacts the electrode sheet, and generating a pressure fluctuation coefficient through a control module (8); A residue acquisition module (7), installed on the outer wall of the scraper (5), for real-time monitoring of the residual amount of the surface material of the electrode sheet, and generating a residual density coefficient through the control module (8); The control module (8) comprehensively analyzes the generated pressure fluctuation coefficient and residual density coefficient to generate an evaluation coefficient. The evaluation coefficient is compared with a preset reference threshold of the evaluation coefficient, and the working states of the rotating mechanism and the scraping mechanism are controlled according to the comparison result.

2. The recycling device for the anode material of a lithium-ion battery according to claim 1, characterized in that, The clamping mechanism further includes a fixture seat (9). A pair of chucks (3) are slidably connected to the bottom end of the fixture seat (9). The top end of the fixture seat (9) is fixedly connected to a first motor (10). The output shaft of the first motor (10) is connected to a connecting shaft (11). A pair of bearing seats (14) are installed inside the fixture seat (9). A bidirectional lead screw (12) is rotatably connected between the two bearing seats (14). The bidirectional lead screw (12) is threadedly connected to the two chucks (3). Bevel gears (13) engaged with each other are respectively installed on the connecting shaft (11) and the bidirectional lead screw (12).

3. The recycling device for the anode material of a lithium-ion battery according to claim 2, characterized in that, The rotating mechanism includes a gear ring (16) rotatably connected to the top end of the cylinder body (1). A circular frame (15) fixedly connected to the fixture seat (9) is fixedly connected to the top of the gear ring (16). The circumferential outer wall of the cylinder body (1) is fixedly connected to a second motor (18) through a bottom plate (17). The output shaft of the second motor (18) is connected to a gear (19). The gear (19) is engaged with the gear ring (16).

4. The recycling device for the anode material of a lithium-ion battery according to claim 1, characterized in that, At the bottom end of the cylinder body (1), a discharge tank (20) is provided. A separable pipe cover (21) is installed at the bottom end of the discharge tank (20).

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

6. The recycling device for the anode material of a lithium-ion battery according to claim 1, wherein The execution steps for the control module (8) to control the working states of the rotating mechanism and the scraping mechanism according to the comparison result are as follows: Initialization: Set the initial pressure of the squeegee (5), the rotation speed of the clamping mechanism, the weight coefficient, and the reference threshold ; Real-time detection: The residue acquisition module (7) acquires the residual amount of the surface material of the electrode sheet; the pressure acquisition module (6) acquires the pressure when the scraper (5) contacts the electrode sheet; Coefficient calculation: The control module (8) calculates the pressure fluctuation coefficient, the residual density coefficient, and the evaluation coefficient; Dynamic adjustment: If : Maintain the current parameters; if : Increase the scraper pressure and decrease the fixture rotation speed.

7. The recycling device for a lithium-ion battery anode material according to claim 1, wherein, The generation logic of the pressure fluctuation coefficient is: S1. Obtain the actual pressure when the scraping mechanism contacts the electrode sheet at different moments within time T during scraping the electrode material on the surface of the electrode sheet through the pressure acquisition module (6), and calibrate the actual pressure obtained at the nth moment within time T as ; S2. Calculate the pressure fluctuation coefficient, and the calculation expression is: In the formula, is the average pressure within time T; is the number of pressure samplings within time T.

8. The recycling device for the anode material of a lithium-ion battery according to claim 7, wherein, The generation logic of the residual density coefficient is: S1. Obtain the actual residual amount of the electrode material on the surface of the electrode sheet at different moments within time T when the scraping mechanism scrapes the electrode material on the surface of the electrode sheet through the residue collection module (7), and calibrate the actual residual amount obtained at the m-th moment within time T as ; S2. Calculate the residual density coefficient, and the calculation expression is: , where t is the number of sampling times within time T.

9. The recycling device for the negative electrode material of a lithium-ion battery according to claim 8, characterized in that Perform formulaic analysis through the control module (8) according to the formula: is the evaluation coefficient, and α and β are preset weight coefficients of pressure and residual density, .

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