A process for recycling waste automobile power battery

Abstract

This invention provides a recycling process for used automotive power batteries, comprising the following steps: cell receiving, terminal grinding, scanning of cell QR codes, cell testing, residual charge treatment, safety testing, electrolyte collection, casing cutting, core extraction, core disassembly, positive electrode peeling, negative electrode peeling, positive electrode powder repair, positive electrode powder regeneration, and material packaging. Scanning the cell QR code allows for association with subsequent cell testing data, facilitating record saving by the MES system. Cell testing saves cell parameters for subsequent optimization and analysis of battery material repair. Residual charge treatment ensures safe disassembly. Safety testing verifies the cell voltage to ensure safety conditions are met during casing cutting. This simple process provides a complete battery recycling chain, improving recycling efficiency, reducing costs, and facilitating monitoring and analysis throughout the entire recycling process.

Description

Technical Field

[0001] This invention relates to the field of battery recycling technology, and more particularly to a recycling process for used automotive power batteries. Background Technology

[0002] A power battery is a power source that provides power to tools, and it mainly refers to the storage battery that powers new energy vehicles, electric trains, electric bicycles, etc. Power batteries have the advantages of high energy, high power, high-rate partial charge state cycling, wide operating temperature range, long service life, and safety and reliability. However, the lifespan of power batteries is limited. Generally, the battery life of new energy vehicles is 5 years, after which the battery pack needs to be replaced. In order to protect the earth's environment, the country advocates dismantling, classifying and recycling battery packs.

[0003] Currently, the recycling of automotive power batteries is basically carried out in a division of labor and cooperation model, with different recycling companies responsible for different stages. This results in a lack of completeness in the existing battery recycling process, a lack of connection and linkage between different stages, and no recycling process for the entire chain to refer to. This affects the efficiency of battery recycling and the growth and development of battery recycling and utilization rate, and increases the cost of battery recycling. Summary of the Invention

[0004] The problem to be solved by this invention is to provide a recycling process for used automotive power batteries, providing a complete battery recycling process, improving the efficiency of battery recycling, and reducing battery recycling costs.

[0005] To solve the above technical problems, a waste automotive power battery recycling process provided by this invention is adopted, which includes the following steps:

[0006] S1. Battery cell arrival: Prepare the battery cells to be disassembled. The surface of the battery cells has a QR code.

[0007] S2. Terminal grinding: Grind the terminals of the battery cell to make them smooth and remove foreign objects and oxide layers from the surface of the terminals;

[0008] S3. Scan the cell QR code: Use a scanner to obtain the QR code and register it in the MES system;

[0009] S4. Cell Testing: The cells are tested in turn according to the registration order of the QR codes. The testing items include the cell's current, voltage, dimensions, weight, and changes in shape. The test data is stored in the MES system.

[0010] S5. Residual power treatment: Discharging or recovering residual power from the battery cells;

[0011] S6. Safety test: Verify the voltage of the battery cell to ensure that the battery cell meets the safety conditions for shell cutting;

[0012] S7. Electrolyte Collection: Collect and process the electrolyte from the battery cell.

[0013] S8. Shell Cutting: The shell of the battery cell is cut.

[0014] S9. Core Extraction: Extract the core from the outer casing of the battery cell;

[0015] S10. Core Disassembly: The core is disassembled in a refined manner to obtain the positive electrode sheet, separator, and negative electrode sheet.

[0016] S11, Positive electrode sheet peeling: The positive electrode sheet is subjected to flexible peeling treatment to obtain aluminum foil and positive electrode powder;

[0017] S12, Negative electrode sheet peeling: The negative electrode sheet is subjected to flexible peeling treatment to obtain copper foil and graphite powder;

[0018] S13. Positive electrode powder repair: Repairing the positive electrode powder to obtain positive electrode powder that meets the requirements for particle size and purity;

[0019] S14. Positive electrode powder regeneration: The positive electrode powder is regenerated to obtain positive electrode powder that meets the parameter requirements of the power battery.

[0020] S15. Material Packaging: Pack the positive electrode powder and send it back to the warehouse.

[0021] Preferably, step S1 includes cell transportation and cell loading; cell transportation: the cells to be disassembled are transported to the cell loading station by AGV; cell loading: the cells are loaded to the terminal grinding station by an industrial robot.

[0022] Preferably, the cathode powder repair process in step S13 includes grinding and slag removal.

[0023] Preferably, the cathode powder regeneration process in step S14 includes lithium replenishment and recrystallization.

[0024] The beneficial effects of this invention are as follows: This invention provides a recycling process for waste automotive power batteries, which includes the following processes: cell material intake, terminal grinding, scanning cell QR codes, cell testing, residual power treatment, safety testing, electrolyte collection, shell cutting, core extraction, core disassembly, positive electrode sheet peeling, negative electrode sheet peeling, positive electrode powder repair, positive electrode powder regeneration, and material packaging. The QR code on the cell surface can be achieved by affixing a QR code label or printing a QR code, facilitating traceability. Polishing the terminals prevents foreign objects, oxide layers, and dirt from causing poor contact during subsequent discharge, affecting discharge efficiency. Scanning the cell's QR code allows for association with subsequent cell testing data, facilitating record saving by the MES system. Cell testing saves cell parameters for subsequent optimization and analysis of battery material repair. Residual charge treatment reduces cell voltage, enabling residual charge recovery and ensuring safe disassembly. Safety testing verifies cell voltage to ensure safe cell cutting, preventing accidents. Electrolyte collection prevents leakage during cutting. This simple process provides a complete battery recycling chain, improving recycling efficiency, reducing costs, facilitating monitoring and analysis throughout the process, and continuously optimizing battery recycling rates. Attached Figure Description

[0025] Figure 1 A process flow diagram illustrating the present invention is provided. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0027] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0028] refer to Figure 1 .

[0029] This invention provides a recycling process for used automotive power batteries, comprising the following steps:

[0030] S1. Battery cell arrival: Prepare the battery cells to be disassembled. The surface of the battery cells has a QR code.

[0031] S2. Terminal grinding: Grind the terminals of the battery cell to make them smooth and remove foreign objects and oxide layers from the surface of the terminals;

[0032] S3. Scan the cell QR code: Use a scanner to obtain the QR code and register it in the MES system;

[0033] S4. Cell Testing: The cells are tested in turn according to the registration order of the QR codes. The testing items include the cell's current, voltage, dimensions, weight, and changes in shape. The test data is stored in the MES system.

[0034] S5. Residual power treatment: Discharging or recovering residual power from the battery cells;

[0035] S6. Safety test: Verify the voltage of the battery cell to ensure that the battery cell meets the safety conditions for shell cutting;

[0036] S7. Electrolyte Collection: Collect and process the electrolyte from the battery cell.

[0037] S8. Shell Cutting: The shell of the battery cell is cut.

[0038] S9. Core Extraction: Extract the core from the outer casing of the battery cell;

[0039] S10. Core Disassembly: The core is disassembled in a refined manner to obtain the positive electrode sheet, separator, and negative electrode sheet.

[0040] S11, Positive electrode sheet peeling: The positive electrode sheet is subjected to flexible peeling treatment to obtain aluminum foil and positive electrode powder;

[0041] S12, Negative electrode sheet peeling: The negative electrode sheet is subjected to flexible peeling treatment to obtain copper foil and graphite powder;

[0042] S13. Positive electrode powder repair: Repairing the positive electrode powder to obtain positive electrode powder that meets the requirements for particle size and purity;

[0043] S14. Positive electrode powder regeneration: The positive electrode powder is regenerated to obtain positive electrode powder that meets the parameter requirements of the power battery.

[0044] S15. Material Packaging: Pack the positive electrode powder and send it back to the warehouse.

[0045] The battery recycling process of this invention includes the following steps: cell receiving, terminal grinding, scanning of cell QR codes, cell testing, residual charge treatment, safety testing, electrolyte collection, casing cutting, core extraction, core disassembly, positive electrode peeling, negative electrode peeling, positive electrode powder repair, positive electrode powder regeneration, and material packaging. The QR codes on the cell surface can be achieved by affixing QR code labels or printing QR codes for easy traceability. Grinding the terminals prevents foreign objects, oxide layers, and dirt from causing poor contact during subsequent discharge, affecting discharge efficiency. Scanning the cell QR codes allows for association with subsequent cell testing data, facilitating record saving by the MES system. Cell testing saves cell parameters for subsequent optimization and analysis of battery material repair. Residual charge treatment reduces cell voltage, enabling residual charge recovery and ensuring disassembly safety. Safety testing verifies cell voltage to ensure safety conditions are met during casing cutting, preventing accidents. Electrolyte collection prevents electrolyte leakage during casing cutting. Its process is simple, providing a complete battery recycling process that can improve the efficiency of battery recycling, reduce battery recycling costs, facilitate the monitoring and analysis of the entire battery recycling process, and achieve continuous optimization of battery recycling rate.

[0046] Based on the above embodiments, step S1 includes cell transportation and cell loading; cell transportation: the cells to be disassembled are transported to the cell loading station by an AGV; cell loading: the cells are loaded to the terminal grinding station by an industrial robot. Automated feeding and loading can save manpower and improve production efficiency.

[0047] Based on the above embodiments, the cathode powder repair process in step S13 includes grinding and slag removal to obtain cathode powder that meets the requirements for particle size and purity.

[0048] Based on the above embodiments, the cathode powder regeneration process in step S14 includes lithium replenishment and recrystallization treatment to obtain cathode powder that meets the parameter requirements of power batteries.

[0049] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A recycling process for used automotive power batteries, characterized in that, It includes the following steps: S1. Battery cell arrival: Prepare the battery cells to be disassembled, the surface of which has a QR code; S2. Grinding the terminals: Grind the terminals of the battery cell to make them flat and remove foreign matter and oxide layer from the surface of the terminals; S3. Scan the cell QR code: Use a barcode scanner to obtain the QR code and register it in the MES system; S4. Cell Inspection: The cells are inspected in turn according to the registration order of the QR codes. The inspection items include the current, voltage, dimensions, weight, and shape changes of the cells. The inspection data is stored in the MES system. S5. Residual power treatment: Discharge or recover residual power from the battery cell; S6. Safety test: Verify the voltage of the battery cell to ensure that the battery cell meets the safety conditions for shell cutting; S7. Electrolyte collection: The electrolyte of the battery cell is collected and processed. S8. Shell cutting: The shell of the battery cell is cut. S9. Core Extraction: Extracting the core from the outer casing of the battery cell; S10. Core disassembly: The core is disassembled in a refined manner to obtain the positive electrode sheet, separator, and negative electrode sheet. S11. Positive electrode sheet peeling: The positive electrode sheet is subjected to flexible peeling treatment to obtain aluminum foil and positive electrode powder; S12, negative electrode sheet peeling: The negative electrode sheet is subjected to flexible peeling treatment to obtain copper foil and graphite powder; S13. Positive electrode powder repair: The positive electrode powder is repaired to obtain positive electrode powder that meets the requirements of particle size and purity. S14. Cathode powder regeneration: The cathode powder is regenerated to obtain cathode powder that meets the parameter requirements of the power battery. S15. Material Packaging: Pack the positive electrode powder and send it to the warehouse.

2. The recycling process for used automotive power batteries according to claim 1, characterized in that, Step S1 includes cell transportation and cell loading; Cell transportation: the cells to be disassembled are transported to the cell loading station by AGV; Cell loading: the cells are loaded to the terminal grinding station by industrial robots.

3. The recycling process for used automotive power batteries according to claim 1, characterized in that, The cathode powder repair process in step S13 includes grinding and slag removal.

4. The recycling process for used automotive power batteries according to claim 1, characterized in that, The cathode powder regeneration process in step S14 includes lithium replenishment and recrystallization.

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