Lithium battery tab polishing device and polishing method
The lithium battery tab polishing device with adaptive contact force control solves the problems of easy damage and pollution emissions during tab polishing, and achieves efficient and stable metal recycling, which is particularly suitable for the automated dismantling of new energy vehicle batteries.
Patent Information
- Application Number
- CN202511886746.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-01-13
AI Technical Summary
In existing automated dismantling and recycling of lithium batteries, the grinding of the electrode tabs can easily damage the substrate, leading to breakage and equipment failure. Furthermore, chemical etching poses pollution emission problems, affecting the metal recovery rate and efficiency.
The grinding mechanism, which employs an elastically deformable grinding section and a floating support, combined with a clamping and moving mechanism and a pressure sensing module, achieves adaptive contact force control between the electrode tab and the grinding section, reducing substrate wear and preventing equipment jamming. It uses a multi-axis robot for high-precision positioning and is equipped with a dust removal system to keep the environment clean.
It improves the quality and efficiency of electrode grinding, reduces equipment failure rate, increases metal recovery rate and grinding qualification rate to 100%, is compatible with accuracy error of ±5mm, meets green recycling requirements, and is suitable for large-scale automated dismantling of new energy vehicle batteries.
Smart Images
Figure CN121315775A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of lithium battery recycling technology, specifically relating to a lithium battery tab polishing device and polishing method. Background Technology
[0002] With the explosive growth of the new energy vehicle and electrochemical energy storage industries, efficient recycling of strategic resources such as lithium, cobalt, and nickel has become an industry necessity. As a key component in lithium battery dismantling, the tabs require thorough polishing of their nickel / copper foil surfaces until the substrate is exposed to ensure safe discharge and recycling. Current automated lithium battery dismantling and recycling technologies primarily rely on rigid grinding wheels or chemical etching for tab polishing. However, the former requires high precision in measuring lithium battery height data, and the polishing process can easily damage the tab substrate, potentially leading to tab breakage or jamming, causing equipment malfunctions and affecting metal recovery rates and efficiency. The latter, on the other hand, is prone to pollution emissions. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a lithium battery tab grinding device and grinding method with high grinding efficiency, good grinding quality of tab surface, low equipment failure rate, low requirements for lithium battery height measurement accuracy, higher grinding qualification rate, improved metal recovery rate and efficiency, and avoidance of pollution emissions.
[0004] The present invention provides a lithium battery tab polishing device, including a polishing mechanism and a clamping and moving mechanism. The polishing mechanism includes a grinding wheel and a rotary drive module for driving the grinding wheel to rotate. The surface of the grinding wheel is provided with a grinding part for performing polishing operations. The grinding part is elastically deformable and / or the polishing mechanism is provided with a floating support. The clamping and moving mechanism is used to clamp and move the lithium battery, and a pressure sensing module is provided in the area of the lithium battery clamping mechanism. The clamping and moving mechanism moves the lithium battery according to the pre-measured lithium battery height data, controlling the initial contact force between the tab and the grinding part; and / or, during the grinding process, moves the lithium battery according to the pressure data fed back in real time by the pressure sensing module, adjusting the contact force between the tab and the grinding part.
[0005] Furthermore, the grinding portion is a bundle of steel wires.
[0006] Furthermore, the length of the steel wire bundle is 200~400mm and the diameter is 150~200mm.
[0007] Furthermore, the grinding part is made of an elastic material, and the surface of the grinding part is embedded with granular abrasive.
[0008] Furthermore, the grinding part is a nylon fiber brush, and the end of the nylon fiber brush is provided with diamond micro powder.
[0009] Furthermore, it also includes a fixed seat and a movable seat, the movable seat being slidably mounted on the fixed seat and connected to the fixed seat by an elastic support member, and the grinding mechanism being mounted on the movable seat so that the grinding mechanism is in a floating support configuration.
[0010] Furthermore, there are two movable seats, both of which are slidably connected to the fixed seat and connected to the fixed seat through elastic support members. The rotary drive mechanism is fixedly mounted on one of the movable seats, and the grinding mold is located between the two movable seats and is rotatably connected to the two movable seats.
[0011] Furthermore, the clamping and moving mechanism is a multi-axis robotic arm.
[0012] Furthermore, it also includes a dust removal system, which includes a dust collection hood located on the side of the mold for collecting dust generated during the grinding of the tabs.
[0013] The present invention also provides a method for polishing lithium battery tabs, using the lithium battery tab polishing device described above, the polishing method comprising the following steps: S1. The clamping and moving mechanism clamps the lithium battery and moves it to the workstation where the grinding mechanism is located; S2. The clamping and moving mechanism moves the lithium battery according to the pre-measured lithium battery height data, controlling the initial contact force between the electrode tab and the grinding part; and / or, during the grinding process, the lithium battery moves according to the pressure data fed back in real time by the pressure sensing module, adjusting the contact force between the electrode tab and the grinding part.
[0014] The beneficial effects of this invention are that it enables adaptive flexible compensation of the grinding contact force during the grinding process. Combined with control of the initial contact force between the tab and the grinding part and / or real-time adjustment of the contact force during grinding, it achieves efficient removal of the coating on the tab surface while reducing excessive wear on the tab substrate. This avoids the problems of tab damage, breakage, and equipment jamming caused by traditional grinding methods, improving the consistency and stability of tab grinding. It boasts advantages such as high grinding efficiency, good tab surface grinding quality, and low equipment failure rate. It also improves metal recovery rate and efficiency, reduces the accuracy requirements for lithium battery height measurement in previous workstations (accommodating accuracy errors of ±5mm), and increases the grinding pass rate to 100%. Compared to chemical etching, it avoids pollution emissions, meets green recycling requirements, and is particularly suitable for large-scale, automated dismantling scenarios of new energy vehicle batteries. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the lithium battery tab polishing device of the present invention.
[0016] Figure 2 This is a schematic diagram of the installation of the grinding mechanism of the present invention.
[0017] In the diagram: 1. Grinding mechanism; 11. Grinding mold; 12. Rotary drive module; 2. Clamping and moving mechanism; 3. Dust hood; 4. Fixed base; 5. Moving base; 6. Elastic support component. Detailed Implementation
[0018] like Figure 1 and Figure 2 As shown, the present invention provides a lithium battery tab polishing device, including a polishing mechanism 1 and a clamping and moving mechanism 2. The polishing mechanism 1 includes a grinding wheel 11 and a rotary drive module 12 for driving the grinding wheel 11 to rotate. The rotary drive module 12 is specifically a motor. The grinding wheel 11 is specifically a grinding wheel or a cylindrical structure, and its surface is provided with a grinding part for performing polishing operations. The grinding part is elastically deformable and / or the polishing mechanism 1 is provided with a floating support to form adaptive flexible compensation during the polishing process.
[0019] The clamping and moving mechanism 2 is used to clamp and move the lithium battery, and a pressure sensing module is provided in the area where the lithium battery is clamped. This pressure sensing module can be a pressure sensor or other sensing module, used to monitor pressure changes in real time during the grinding process, with a pressure monitoring range of 60-100N. The clamping and moving mechanism 2 moves the lithium battery according to the lithium battery height data pre-measured at the previous station, controlling the initial contact force between the tab and the grinding part; and / or, during the grinding process, moves the lithium battery according to the pressure data fed back in real time by the pressure sensing module, adjusting the contact force between the tab and the grinding part. That is, the contact force of the tab grinding is controlled through at least one of the aforementioned methods.
[0020] Based on the above settings, adaptive flexible compensation of the grinding contact force can be achieved during the grinding process. Combined with the control of the initial contact force between the tab and the grinding part and / or the real-time adjustment of the contact force between the tab and the grinding part during grinding, the coating on the tab surface can be efficiently removed while reducing excessive wear on the tab substrate. This avoids the problems of tab damage, breakage, and equipment jamming caused by traditional grinding methods, improves the consistency and stability of tab grinding, and has the advantages of high grinding efficiency, good tab surface grinding quality, and low equipment failure rate. It can improve metal recovery rate and efficiency, and also reduce the requirements of the preceding station for the accuracy of lithium battery height measurement. It can be compatible with an accuracy error of ±5mm and improve the grinding pass rate to 100%. Compared with chemical etching, it can avoid pollution emissions and meet green recycling requirements, making it particularly suitable for large-scale, automated dismantling scenarios of new energy vehicle batteries.
[0021] The grinding part is a steel wire bundle. By using a steel wire bundle as the grinding part of the abrasive 11, it has good flexibility and adaptability, and can automatically adapt to the unevenness of the tab surface during the grinding process, reducing damage to the substrate and improving the uniformity of grinding.
[0022] The steel wire bundle has a length of 200-400mm and a diameter of 150-200mm. This size range balances the flexibility and structural strength of the wire bundle, ensuring efficient removal of the surface coating without affecting the grinding quality due to excessive wear or deformation. The steel wire bundle is specifically made of stainless steel or copper-plated steel wire, and the grinding wheel 11 rotates at 1000-1500 rpm during grinding.
[0023] The grinding part is made of an elastic material, and its surface is embedded with granular abrasive particles with a hardness of 50-70 HRC. This design ensures both flexible contact between the grinding part and the tab surface during grinding and effectively guarantees grinding efficiency.
[0024] The grinding component is a nylon fiber brush, with diamond micropowder at its end. This diamond micropowder is specifically bonded to the end of the nylon fiber brush. The preferred fiber density in the nylon fiber brush is 400-800 fibers / cm². The nylon fiber brush possesses good elasticity and wear resistance, and the diamond micropowder at its end ensures grinding efficiency and precision, making it suitable for removing high-hardness coatings while maintaining protection of the tab substrate.
[0025] The invention also includes a fixed base 4 and a movable base 5. The movable base 5 is slidably mounted on the fixed base 4 via a slide rail and a slider, and the movable base 5 is connected to the fixed base 4 via an elastic support 6. The grinding mechanism 1 is mounted on the movable base 5, so that the grinding mechanism 1 is in a floating support configuration. Based on this configuration, the self-adaptive capability of the grinding tool 11 during the grinding process can be further enhanced by the elastic deformability of the grinding part, while avoiding uneven grinding caused by equipment vibration or positional deviation. Furthermore, based on this configuration, in some other embodiments, the grinding tool 11 can achieve adaptive flexible compensation of the grinding contact force even if it is a rigid structure.
[0026] Two movable seats 5 are provided, both of which are slidably connected to the fixed seat 4 and connected to the fixed seat 4 via elastic support members 6. The rotary drive mechanism is fixedly mounted on one of the movable seats 5, and the grinding wheel 11 is located between the two movable seats 5 and rotatably connected to them. This improves the stability and balance of the grinding wheel 11, making it particularly suitable for grinding wheels 11 used in large or high-speed rotation scenarios, ensuring a smooth and reliable grinding process. The elastic support member 6 can be a spring or other elastic support member, and it is located below the movable seat 5.
[0027] The clamping and moving mechanism 2 is a multi-axis manipulator that can achieve high-precision, multi-angle positioning and motion control, and is suitable for automated grinding operations under complex working conditions.
[0028] The present invention also includes a dust removal system, which includes a dust collection hood 3 connected to a negative pressure generating device or an air extraction device of the dust removal system. The dust collection hood 3 is located on the side of the mold 11 and is used to collect the dust generated during the grinding of the tabs, so as to avoid pollution of the production line environment and keep the working area clean.
[0029] The present invention also provides a method for polishing lithium battery tabs, which uses the lithium battery tab polishing device described above, and the polishing method specifically includes the following steps: S1. The clamping and moving mechanism 2 clamps the lithium battery and moves it to the workstation where the grinding mechanism 1 is located; S2, the clamping and moving mechanism 2 moves the lithium battery according to the pre-measured lithium battery height data, controlling the initial contact force between the tab and the grinding part; and / or, during the grinding process, moves the lithium battery according to the pressure data fed back in real time by the pressure sensing module, adjusting the contact force between the tab and the grinding part; that is, the contact force of the tab grinding is controlled by at least one of the aforementioned methods.
[0030] This polishing method, by incorporating the aforementioned lithium battery tab polishing device, can efficiently remove the coating on the tab surface, reduce excessive wear on the tab substrate, improve the consistency and stability of the tab polishing process, achieve high polishing efficiency, and produce high-quality tab surface polishing. It can also improve metal recovery rate and efficiency, reduce the requirements of the preceding workstations on the accuracy of lithium battery height measurement, be compatible with an accuracy error of ±5mm, and increase the polishing pass rate to 100%. Furthermore, it can avoid pollution emissions and meet green recycling requirements, making it particularly suitable for large-scale, automated dismantling scenarios of new energy vehicle batteries.
[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.
[0032] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.
Claims
1. A lithium battery tab polishing device, characterized in that, The device includes a grinding mechanism (1) and a clamping and moving mechanism (2). The grinding mechanism (1) includes a grinding wheel (11) and a rotary drive module (12) for driving the grinding wheel (11) to rotate. The surface of the grinding wheel (11) is provided with a grinding part for performing grinding operations. The grinding part is elastically deformable and / or the grinding mechanism (1) is provided with a floating support. The clamping and moving mechanism (2) is used to clamp and move the lithium battery, and a pressure sensing module is provided in the area where the lithium battery is clamped. The clamping and moving mechanism (2) moves the lithium battery according to the pre-measured lithium battery height data, and controls the initial contact force between the tab and the grinding part; and / or, during the grinding process, moves the lithium battery according to the pressure data fed back in real time by the pressure sensing module, and adjusts the contact force between the tab and the grinding part.
2. The lithium battery tab polishing device as described in claim 1, characterized in that, The grinding part is a bundle of steel wires.
3. The lithium battery tab polishing device as described in claim 2, characterized in that, The length of the steel wire bundle is 200~400mm and the diameter is 150~200mm.
4. The lithium battery tab polishing device as described in claim 1, characterized in that, The grinding part is made of an elastic material, and the surface of the grinding part is embedded with granular abrasive.
5. The lithium battery tab polishing device as described in claim 1, characterized in that, The grinding part is a nylon fiber brush, and diamond micro powder is provided at the end of the nylon fiber brush.
6. The lithium battery tab polishing device as described in claim 1, characterized in that, It also includes a fixed seat (4) and a movable seat (5), the movable seat (5) is slidably disposed on the fixed seat (4), and the movable seat (5) and the fixed seat (4) are connected by an elastic support member (6), the grinding mechanism (1) is disposed on the movable seat (5) so that the grinding mechanism (1) is in a floating support setting.
7. The lithium battery tab polishing device as described in claim 6, characterized in that, There are two movable seats (5), both of which are slidably connected to the fixed seat (4) and are connected to the fixed seat (4) through an elastic support member (6). The rotary drive mechanism is fixedly installed on one of the movable seats (5), and the grinding wheel (11) is located between the two movable seats (5) and is rotatably connected to the two movable seats (5).
8. The lithium battery tab polishing apparatus according to any one of claims 1-7, characterized in that, The clamping and moving mechanism (2) is a multi-axis manipulator.
9. The lithium battery tab polishing apparatus according to any one of claims 1-7, characterized in that, It also includes a dust removal system, which includes a dust collection hood (3) located on the side of the abrasive (11) for collecting dust generated during the grinding of the tabs.
10. A method for polishing lithium battery tabs, characterized in that, The lithium battery tab polishing apparatus as described in any one of claims 1-9 is used, and the polishing method includes the following steps: S1, The clamping and moving mechanism (2) clamps the lithium battery and moves it to the workstation where the grinding mechanism (1) is located; S2, Clamping and moving mechanism (2) moves the lithium battery according to the pre-measured lithium battery height data, and controls the initial contact force between the tab and the grinding part; and / or, during the grinding process, moves the lithium battery according to the pressure data fed back in real time by the pressure sensing module, and adjusts the contact force between the tab and the grinding part.