Pole piece weighing device and battery production system with same

Abstract

The utility model discloses a kind of pole piece weighing device and the battery production system with it, pole piece weighing device includes: weighing assembly, weighing assembly includes first support and weighing module, weighing module is located on first support, and including the weighing unit for measuring pole piece weight;Feeding and discharging assembly, feeding and discharging assembly includes second support and feeding and discharging module, second support and first support are mutually independent and interval arrangement, feeding and discharging module is located on second support, and for pole piece is conveyed to weighing unit and pole piece is removed from weighing unit.According to the pole piece weighing device of the utility model, manual intervention can be reduced, labor cost is reduced, human error is reduced, the detection accuracy of weighing unit can be considered while high efficiency, ensure the accurate control for pole piece weight, match the high-speed production demand of battery production system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an electrode weighing device and a battery production system having the same. Background Technology

[0002] To ensure consistency in key parameters such as cell capacity and internal resistance, it is typically necessary to weigh and measure the electrodes during the electrode manufacturing process to distinguish between qualified and unqualified products. Currently, manual weighing is commonly used. Operators manually remove the electrodes from the material box or conveyor belt, place them on a precision electronic scale, record the weight, and then manually move the electrodes to the next process. This production method suffers from low efficiency, high labor costs, and unstable accuracy, and can no longer meet the high-speed production demands of battery manufacturing systems. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electrode weighing device that reduces manual intervention and labor costs, while maintaining high efficiency and weighing accuracy, ensuring precise control of electrode weight and meeting the high-speed production requirements of battery manufacturing systems.

[0004] This utility model also proposes a battery production system, which includes the above-mentioned electrode weighing device.

[0005] The electrode weighing device according to an embodiment of the present invention includes: a weighing assembly, the weighing assembly including a first support and a weighing module, the weighing module being disposed on the first support and including a weighing unit for measuring the weight of the electrode; and a loading and unloading assembly, the loading and unloading assembly including a second support and a loading and unloading module, the second support being independent of and spaced apart from the first support, the loading and unloading module being disposed on the second support and used for conveying the electrode to the weighing unit and removing the electrode from the weighing unit.

[0006] According to the embodiment of the present invention, the electrode weighing device can replace manual labor in conveying electrodes to and removing them from the weighing unit by setting up a loading and unloading module. This reduces manual intervention, lowers labor costs, reduces human error, and improves detection efficiency, matching the high-speed production requirements of battery production systems. By placing the weighing module and the loading and unloading module on the first and second supports respectively, and by setting the first and second supports independently and at intervals, the vibration generated during the operation of the loading and unloading module can be avoided from being transmitted to the weighing module, reducing the interference of external factors on the weighing unit. Thus, it can maintain high efficiency while ensuring the detection accuracy of the weighing unit, ensuring precise control of the electrode weight.

[0007] In addition, the electrode weighing device according to this utility model may also have the following additional technical features:

[0008] In some embodiments, the weighing assembly further includes a damping assembly disposed at the bottom of the first support and adapted to support the ground, for supporting the first support and reducing vibration.

[0009] In some embodiments, the damping components are a plurality of spaced-apart components; and / or, the damping components include rollers and damping legs, the damping legs being disposed on one side of the rollers and being liftable relative to the rollers.

[0010] In some embodiments, the weighing module further includes a base, which is disposed on the first support, and the weighing unit is placed on the base, wherein the base is a marble platform.

[0011] In some embodiments, the base is connected to the first support by fasteners; and / or, the upper surface of the first support has a groove, and at least a portion of the base is located within the groove.

[0012] In some embodiments, the weighing module further includes a windproof cover, which is disposed outside the weighing unit.

[0013] In some embodiments, the windproof cover includes: a cover body defining a cavity, the upper surface of the cover body having an opening communicating with the cavity, the weighing unit being disposed in the cavity, and the opening for allowing the electrode to enter and exit the cavity; and a cover body detachably or movably connected to the cover body for opening and closing the opening.

[0014] In some embodiments, the inner periphery of the opening protrudes with a support ring extending in the circumferential direction of the opening, and when the cover body closes the opening, the lower end face of the cover body is supported on the upper surface of the support ring.

[0015] In some embodiments, the windproof cover further includes a sealing strip, which is sealed between the lower end face of the cover body and the upper surface of the support ring, and the sealing strip extends in the circumferential direction of the opening.

[0016] In some embodiments, the weighing assembly includes a plurality of the first supports, each of which is provided with the weighing module.

[0017] In some embodiments, the loading and unloading module includes a robotic arm configured to pick up and place electrode sheets into any of the weighing units by means of movement.

[0018] In some embodiments, the loading and unloading module includes: a loading bin for placing the electrode sheet to be tested; an unloading bin spaced apart from the loading bin, the unloading bin including a first bin for placing electrode sheets that have passed the weighing test and a second bin for placing electrode sheets that have failed the weighing test; and a robotic arm for conveying the electrode sheet to be tested to the weighing module and conveying the weighed electrode sheet to the unloading bin.

[0019] In some embodiments, the first hopper is a plurality of spaced-apart hoppers; and / or, the second hopper is a plurality of hoppers and includes an overweight hopper and an underweight hopper, wherein the overweight hopper is used to store overweight electrode sheets and the underweight hopper is used to store underweight electrode sheets.

[0020] In some embodiments, the robotic arm includes a motion mechanism and a suction mechanism, the suction mechanism being used to pick up and release electrode sheets, the suction mechanism being disposed on the motion mechanism, and the motion mechanism being used to drive the suction mechanism to move.

[0021] This utility model also provides a battery production system having the above-described embodiments.

[0022] According to the battery production system of this utility model embodiment, by providing the above-mentioned electrode weighing device, the electrode weighing device is used to receive the electrode sheets from the previous process (slitting device) and weigh and detect them. The electrode sheets that pass the weighing are then sent to the winding / stacking device for winding or stacking operations. The electrode weighing device can be synchronously and efficiently weighed with the high-speed coating device, slitting device, and winding / stacking device, thereby accelerating the battery production cycle, meeting the high-speed production needs of the battery production system, and matching the expansion needs of battery production capacity.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a perspective view of the electrode weighing device according to an embodiment of the present utility model;

[0026] Figure 2 This is a perspective view of the electrode weighing device according to an embodiment of the present utility model, wherein some cabinet doors, some loading lifting devices, some unloading lifting devices, the cover body of one windproof cover and the cover body of another windproof cover are not shown.

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a perspective view of the electrode weighing device according to an embodiment of the present utility model, wherein some cabinet doors, some loading lifting devices, some unloading lifting devices, the cover body of one windproof cover and the cover body of another windproof cover are not shown.

[0029] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0030] Figure label:

[0031] 100. Electrode weighing device; 200. Electrode;

[0032] 10. Weighing components;

[0033] 1. First support; 11. Settling tank;

[0034] 2. Weighing module; 21. Weighing unit; 22. Base; 23. Windproof cover; 231. Cover body; 2311. Cavity; 2312. Opening; 232. Cover body; 233. Sealing strip; 234. Drive motor; 24. Damper;

[0035] 3. Damping assembly; 31. Roller; 32. Damping support leg;

[0036] 20. Loading and unloading components;

[0037] 4. Second bracket; 41. Frame; 42. Cabinet door;

[0038] 5. Loading and unloading module; 51. Loading bin; 511. Loading lifting device; 5111. Loading motor; 5112. Loading screw; 512. Loading support block; 52. Unloading bin; 521. First bin; 522. Second bin; 5221. Overweight bin; 5222. Underweight bin; 523. Unloading lifting device; 5231. Unloading motor; 5232. Unloading screw; 524. Unloading support block; 53. Robotic arm; 531. Motion mechanism; 532. Suction mechanism. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The electrode weighing device 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0044] like Figure 1 As shown, the electrode weighing device 100 according to an embodiment of the present invention includes a weighing component 10 and a loading / unloading component 20.

[0045] Specifically, see the attached document. Figure 1 As shown, the weighing assembly 10 includes a first support 1 and a weighing module 2. The weighing module 2 is mounted on the first support 1 and includes a weighing unit 21 for measuring the weight of the electrode 200. The loading and unloading assembly 20 includes a second support 4 and a loading and unloading module 5. The second support 4 is independent of the first support 1 and is spaced apart from it. The loading and unloading module 5 is mounted on the second support 4 and is used to transport the electrode 200 to the weighing unit 21 and to remove the electrode 200 from the weighing unit 21.

[0046] Understandably, compared to the existing technology where operators manually remove the electrode sheets from the material box or conveyor belt, place them on an electronic scale, record the weight, and then manually remove the electrode sheets from the electronic scale, the electrode sheet weighing device 100 of this utility model transports the electrode sheet 200 to be tested to the weighing unit 21 through the loading and unloading module 5. The weighing unit 21 weighs the electrode sheet 200 to be tested. After weighing, the loading and unloading module 5 removes the electrode sheet 200 from the weighing unit 21. On the one hand, it can achieve automation and seamless integration into automated production lines, significantly reducing labor costs, reducing human error, reducing manual intervention, reducing the risk of electrode sheet 200 contamination, improving the yield and safety of electrode sheet 200, and ensuring stable accuracy. On the other hand, by reducing downtime or speed reduction caused by the weighing process, it can improve the overall efficiency of the electrode sheet weighing device 100, speed up the battery production cycle, meet the high-speed production needs of the battery production system, and match the expansion needs of battery production capacity.

[0047] By setting the first support 1 and the second support 4 independently and at intervals, with the weighing module 2 located on the first support 1 and the loading / unloading module 5 located on the second support 4, the vibration generated during the operation of the loading / unloading module 5 can be prevented from being transmitted to the first support 1 through the second support 4 and then to the weighing module 2. This reduces the interference of external factors on the weighing unit 21, thereby ensuring the detection accuracy of the weighing unit 21 and ensuring precise control of the weight of the electrode 200. This helps to ensure the consistency of key parameters such as cell capacity and internal resistance, and ensures the performance and service life of the battery pack.

[0048] Preferably, the weighing unit 21 can be a high-precision strain gauge sensor to ensure the accuracy of the weight measurement of the electrode 200. It should be noted that the data collected in real time by the weighing unit 21 can be uploaded to the MES (Manufacturing Execution System) for process monitoring, quality traceability, and process optimization, which is beneficial for building a smart battery factory and realizing intelligent manufacturing.

[0049] Further, see attached document. Figure 1 and attached Figure 4 As shown, the second support 4 includes a frame 41 and a cabinet door 42. The frame 41 serves as the main frame of the second support 4, responsible for providing the stability and load-bearing capacity of the overall structure. The cabinet door 42 serves as the openable part of the support, used to enclose the internal space of the second support 4, which can protect the internal structure of the second support 4 and improve its aesthetics.

[0050] According to the embodiment of the present invention, the electrode weighing device 100 can replace manual labor by setting up the loading and unloading module 5 to transport the electrode 200 to the weighing unit 21 and remove the electrode 200 from the weighing unit 21. This can reduce manual intervention, lower labor costs, reduce human error, improve detection efficiency, and match the high-speed production requirements of the battery production system. By placing the weighing module 2 and the loading and unloading module 5 on the first support 1 and the second support 4 respectively, and the first support 1 and the second support 4 being independent and spaced apart, the vibration generated during the operation of the loading and unloading module 5 can be avoided from being transmitted to the weighing module 2, reducing the interference of external factors on the weighing unit 21. Thus, it can maintain high efficiency while ensuring the detection accuracy of the weighing unit 21, and ensure precise control of the weight of the electrode 200.

[0051] In some embodiments of this utility model, reference is made to the appendix. Figure 1 Appendix Figure 2 and attached Figure 4 As shown, the weighing assembly 10 also includes a damping assembly 3. The damping assembly 3 is located at the bottom of the first support 1 and is suitable for supporting the ground. It is used to support the first support 1 and reduce vibration. It can be understood that, on the one hand, the damping assembly 3 can absorb vibration from the ground, thereby reducing the vibration transmitted to the first support 1, reducing the impact of vibration on the weighing unit 21, ensuring the detection accuracy of the weighing unit 21, and ensuring precise control of the weight of the electrode 200. On the other hand, when the ground is slightly tilted or the first support 1 is tilted by an external force, the buffering effect of the damping assembly 3 can help the first support 1 quickly restore balance, avoid the risk of tipping over, and improve the stability of the weighing assembly 10. Furthermore, long-term vibration may cause structural fatigue of the weighing assembly 10. The setting of the damping assembly 3 can reduce the vibration intensity and reduce component wear, thereby relatively extending the overall service life of the weighing assembly 10.

[0052] In a further embodiment of this utility model, reference is made to the appendix. Figure 2 As shown, multiple damping components 3 are spaced apart. The arrangement of multiple damping components 3 can distribute the weight of the first support 1 and the impact force from the ground to more points, avoiding the risk of deformation or tipping due to excessive force at a single point, and improving the stability of the weighing component 10. For example, the damping components 3 can be two, three, four, five, or six spaced apart. In a specific example, referring to the attached figure, four damping components 3 are spaced apart, with the first support 1 positioned vertically (e.g., in the vertical direction). Figure 2 The projection on the rectangle is rectangular, and the four damping components 3 are located at the four apex corners of the rectangle, which can better provide support and vibration reduction.

[0053] Further, see attached document. Figure 5 As shown, in conjunction with the reference appendix Figure 4The damping component 3 includes a roller 31 and a damping leg 32. The damping leg 32 is located on one side of the roller 31 and can be raised and lowered relative to the roller 31. During the movement of the weighing component 10, the damping leg 32 retracts and the roller 31 contacts the ground, which allows the weighing component 10 to slide or move easily, making it convenient to adjust the position of the weighing component 10. After the weighing component 10 is moved into place, the damping leg 32 contacts the ground and supports the roller 31, which can absorb vibration, disperse pressure, and prevent the first support 1 from sliding or tipping over.

[0054] In some embodiments of this utility model, reference is made to the appendix. Figure 2 and attached Figure 3 As shown, the weighing module 2 also includes a base 22, which is mounted on the first support 1. The weighing unit 21 is placed on the base 22. The base 22 is a marble platform. Marble has the characteristics of high hardness, low deformability, and good temperature stability. It is not easy to dent or deform due to external forces or environmental factors. This can avoid uneven force on the weighing unit 21 caused by the deformation of the base 22, thereby ensuring weighing accuracy. In addition, the high density and weight of marble can make the contact between the base 22 and the first support 1 more stable, reducing the risk of the base 22 slipping or tilting due to external forces during weighing, and reducing the vibration transmitted to the weighing unit 21.

[0055] Preferably, refer to the appendix Figure 3 As shown, multiple dampers 24 are provided between the weighing unit 21 and the base 22. The multiple dampers 24 are spaced apart along the circumferential direction of the weighing unit 21. The dampers 24 can absorb the vibration from the base 22, further reduce the vibration transmitted to the weighing unit 21, reduce the impact of vibration on the weighing unit 21, ensure the detection accuracy of the weighing unit 21, and ensure precise control of the weight of the electrode 200.

[0056] In a further embodiment of this utility model, the base 22 and the first support 1 are connected by fasteners. The connection of the fasteners can be physically locked by mechanical interlocking, which improves the connection strength between the base 22 and the first support 1, ensures the stability of the connection between the base 22 and the first support 1, and allows for quick disassembly of the fastener connection if the first support 1 or the base 22 needs maintenance, avoiding damage to the surface of the marble platform, extending the overall life of the weighing component 10, and reducing the overall scrapping caused by local damage.

[0057] Further, see attached document. Figure 3 As shown, the upper surface of the first bracket 1 has a recess 11, and at least part of the base 22 is located in the recess 11. The recess 11 provides a clear installation position for the base 22, ensuring that the base 22 is installed in the designated position, avoiding positional deviation of the base 22, and ensuring accurate loading and unloading of the electrode sheet 200 by the subsequent loading and unloading module 5.

[0058] It is understandable that the base 22 and the first bracket 1 can be connected by fasteners alone, or by limiting the position by the sink 11 alone, or by both limiting the position by the sink 11 and fixing it with fasteners. No further restrictions are imposed here.

[0059] In some embodiments of this utility model, reference is made to the appendix. Figure 2 As shown, the weighing module 2 also includes a windproof cover 23, which covers the weighing unit 21 and is fixed to the base 22 by fasteners. The windproof cover 23 and the base 22 together form a sealed cavity 2311, and low-disturbance airflow control (such as laminar flow) is performed inside to reduce the impact of airflow on weighing and further improve weighing accuracy. Preferably, the windproof cover 23 is made of transparent acrylic material, which makes it easy to view the weighing status of the weighing unit 21.

[0060] In a further embodiment of this utility model, reference is made to the appendix. Figure 2 As shown, the windproof cover 23 includes a cover body 231 and a cover body 232. The cover body 231 defines a cavity 2311. The upper surface of the cover body 231 has an opening 2312, which communicates with the cavity 2311. The weighing unit 21 is disposed in the cavity 2311. The opening 2312 is used for the electrode 200 to enter and exit the cavity 2311. The cover body 232 is detachably connected to the cover body 231 or movablely connected to it for opening and closing the opening 2312.

[0061] Understandably, during the weighing process of the weighing unit 21 or when the electrode weighing device 100 is not in operation, the cover 232 closes the opening 2312, which can seal the cavity 2311, reduce the impact of airflow on the weighing, improve the weighing accuracy, prevent dust, impurities, etc. from falling into the cavity 2311, avoid affecting the accuracy of the weighing unit 21, and ensure the cleanliness of the cavity 2311. During the loading and unloading of the electrode 200, the cover 232 opens the opening 2312, which can facilitate the loading and unloading module 5 to transport the electrode 200 to the weighing unit 21 and remove the electrode 200 from the cavity 2311.

[0062] Further, see attached document. Figure 2 As shown, the cover body 232 is rotatably connected to the cover body 231. The windproof cover 23 also includes a drive motor 234, which is located on the cover body 231 and is used to drive the cover body 232 to rotate, so as to open or close the opening 2312. The operator does not need to manually open or close the opening 2312, and there is no need to stop or slow down the machine, which can improve the safety of operation.

[0063] In a further embodiment of this utility model, reference is made to the appendix. Figure 2As shown, a support ring protrudes from the inner circumference of the opening 2312, extending in the circumferential direction of the opening 2312. When the cover body 232 closes the opening 2312, the lower end face of the cover body 232 rests on the upper surface of the support ring. The support ring provides support to the cover body 232 when the opening 2312 is closed, preventing the cover body 232 from rotating excessively and thus failing to properly seal the opening 2312. This ensures the reliability of the cover body 232's sealing of the opening 2312 and prevents airflow, dust, impurities, etc., from entering the cavity 2311 through the gap between the cover body 232 and the cover body 231, thereby avoiding affecting the weighing accuracy. Preferably, the support ring is made of stainless steel.

[0064] In a further embodiment of this utility model, reference is made to the appendix. Figure 2 and attached Figure 3 As shown, the windproof cover 23 also includes a sealing strip 233. The sealing strip 233 is sealed between the lower end face of the cover body 232 and the upper surface of the support ring. The sealing strip 233 extends along the circumferential direction of the opening 2312. When the cover body 232 closes the opening 2312, the sealing strip 233 can further improve the sealing reliability of the opening 2312, and prevent airflow, dust, impurities and other substances from entering the cavity 2311 through the gap between the cover body 232 and the cover body 231, so as to avoid affecting the weighing accuracy.

[0065] Optionally, the sealing strip 233 may be provided only on the upper surface of the support ring, or only on the lower end face of the cover body 232, or both the upper surface of the support ring and the lower end face of the cover body 232 may be provided with the sealing strip 233. Preferably, the sealing strip 233 is an EVA (Ethylene Vinyl Acetate) component, which can play a role in buffering and shock absorption, and prevent the opening and closing of the cover body 232 from affecting the weighing accuracy.

[0066] In some embodiments of this utility model, reference is made to the appendix. Figure 1 As shown, the weighing assembly 10 includes multiple first supports 1, each of which is equipped with a weighing module 2. Each weighing module 2 can only weigh one electrode 200 at a time. The arrangement of multiple first supports 1 allows the electrode weighing device 100 to have multiple weighing modules 2, enabling simultaneous weighing of multiple electrode 200s. This improves the weighing efficiency of the electrode weighing device 100, accelerates battery production, meets the high-speed production requirements of the battery production system, and matches the expansion needs of battery production capacity. For example, the number of first supports 1 can be two, three, or four. Multiple first supports 1 are spaced apart along the circumferential direction of the second support 4, facilitating the loading and unloading module 5 to transport the electrode 200s to multiple weighing units 21 for weighing and to remove the electrode 200s from the multiple weighing units 21.

[0067] In a further embodiment of this utility model, reference is made to the appendix. Figure 1 As shown, the loading and unloading module 5 includes a robotic arm 53, which is configured to pick up and place electrode sheets 200 at any weighing unit 21 through movement. It can be understood that, compared with the prior art where the operator manually removes the electrode sheets from the material box or conveyor belt, places them on the electronic scale, records the weight, and then manually removes the electrode sheets from the electronic scale, the electrode weighing device 100 of this utility model uses the robotic arm 53 to pick up and place the electrode sheets 200. On the one hand, it can realize automation, significantly reduce labor costs, reduce human error, reduce manual intervention, reduce the risk of electrode sheet 200 being contaminated, improve the yield and safety of electrode sheet 200, and ensure stable accuracy. On the other hand, by reducing downtime or speed reduction caused by the weighing process, it can improve the overall efficiency of the electrode weighing device 100, speed up the battery production cycle, meet the high-speed production needs of the battery production system, and match the expansion needs of battery production capacity.

[0068] Furthermore, the robotic arm 53 can pick up and place electrode sheets 200 in any weighing unit 21 through movement. It can make full use of the rapid movement characteristics of the robotic arm 53. During the weighing of one weighing unit 21, the robotic arm 53 can pick up the electrode sheet 200 and transport it to another weighing unit 21 for weighing, which can further improve the overall efficiency of the electrode weighing device 100, speed up the battery production cycle, meet the high-speed production needs of the battery production system, and match the expansion needs of battery production capacity.

[0069] In a specific example, see Appendix Figure 1 and attached Figure 2 As shown, there are two first supports 1, each of which is equipped with a weighing module 2. The robotic arm 53 can first transport the first electrode to be tested 200 to the first weighing unit 21 for weighing. During the interval of weighing the first electrode 200, the robotic arm 53 picks up the second electrode to be tested 200 and transports it to the second weighing unit 21 for weighing. Then it picks up the third electrode to be tested 200 and moves it to the first weighing unit 21. After the first electrode 200 is weighed, the robotic arm 53 picks up the first electrode 200 and places the third electrode 200 in the first weighing unit 21 for weighing. The robotic arm 53 picks up the fourth electrode to be tested 200 and moves it to the second weighing unit 21. After the second electrode 200 is weighed, the robotic arm 53 picks up the second electrode 200 and places the fourth electrode 200 in the second weighing unit 21 for weighing. The steps are repeated to weigh the next electrode 200.

[0070] In some embodiments of this utility model, reference is made to the appendix. Figure 2 and attached Figure 4As shown, the loading and unloading module 5 includes a loading bin 51, an unloading bin 52, and a robotic arm 53. The loading bin 51 is used to place the electrode sheet 200 to be tested. The loading bin 51 includes a loading lifting device 511 and a loading support block 512 driven by the loading lifting device 511. The electrode sheet 200 to be tested is placed on the loading support block 512. The loading lifting device 511 includes a loading motor 5111 and a loading screw 5112 driven by the loading motor 5111. When the topmost electrode sheet 200 in the loading support block 512 is sucked away, the loading support block 512 can be driven to rise one position through the cooperation of the loading motor 5111 and the loading screw 5112, ensuring that the top electrode sheet 200 is in a position that can be sucked up.

[0071] Further, see attached document. Figure 2 and attached Figure 4 As shown, the unloading bin 52 and the loading bin 51 are spaced apart to avoid interfering with the picking and placing of the robotic arm 53. The unloading bin 52 includes a first bin 521 for placing the electrode sheets 200 that have passed the weight test, and a second bin 522 for placing the electrode sheets 200 that have failed the weight test. The electrode sheets 200 that have passed the weight test and the electrode sheets 200 that have failed the weight test can be classified and placed separately to ensure that the electrode sheets 200 entering the subsequent process are all electrode sheets 200 that have passed the weight test, thereby improving the production qualification rate. The first hopper 521 includes a feeding lifting device 523 and a feeding support block 524 driven by the feeding lifting device 523. The weighed and qualified electrode 200 is placed on the feeding support block 524. The feeding lifting device 523 includes a feeding motor 5231 and a feeding screw 5232 driven by the feeding motor 5231. After adding an electrode 200 on the feeding support block 524, the feeding motor 5231 and the feeding screw 5232 can be used to drive the feeding support block 524 to descend one position, ensuring that a position at the top is empty for feeding.

[0072] Furthermore, see the attached document. Figure 2 and attached Figure 4 As shown, the robotic arm 53 is used to transport the electrode to be tested 200 to the weighing module 2 and to transport the weighed electrode 200 to the unloading bin 52. It can be understood that the robotic arm 53 moves to the loading bin 51, picks up an electrode to be tested 200, and then accurately places the electrode to be tested 200 at the center of the designated position of the weighing unit 21 (this position has been calibrated to ensure repeatability). The robotic arm 53 releases the electrode 200 and moves it away. After waiting for a preset time, the weighing is completed. The control system judges whether the electrode 200 is qualified or unqualified based on the weighing result. According to the judgment result of the control system, the robotic arm 53 moves back to the weighing unit 21 to pick up the electrode 200 and transport the electrode 200 to the corresponding first bin 521 or second bin 522.

[0073] Understandably, compared to the existing technology where operators manually remove the electrode sheets from the material box or conveyor belt, place them on an electronic scale, record the weight, and then manually remove the electrode sheets from the electronic scale, the electrode sheet weighing device 100 of this utility model adopts a loading and unloading assembly 20. The loading bin 51 can automatically provide the electrode sheets 200 to be tested, the first material bin 521 can automatically collect the electrode sheets 200 that have passed the weighing, and the robotic arm 53 can be used to transport the electrode sheets 200 to be tested to the weighing module 2 and to transport the weighed electrode sheets 200 to the unloading bin 52. On the one hand, it can achieve automation, significantly reduce labor costs, reduce human error, reduce manual intervention, reduce the risk of electrode sheet 200 being contaminated, improve the yield and safety of electrode sheets 200, and ensure stable accuracy. On the other hand, by reducing downtime or speed reduction caused by the weighing process, it can improve the overall efficiency of the electrode sheet weighing device 100, speed up the battery production cycle, meet the high-speed production needs of the battery production system, and match the expansion needs of battery production capacity. Furthermore, by separating the weighed and unweighed electrode sheets 200, consistency can be improved, scrap due to unqualified weight can be reduced, and production quality can be guaranteed.

[0074] Preferably, a first sensor is provided on the feeding hopper 51, and a second sensor is provided on the first hopper 521. By setting the first sensor, a signal can be sent to remind the operator to release material when the feeding hopper 51 is empty. By setting the second sensor, a signal can be sent to remind the operator to collect material when the first hopper 521 is full, thereby avoiding affecting the normal operation of the electrode weighing device 100 and meeting the high-speed production requirements of the battery production system.

[0075] Optionally, the loading and unloading module 5 is mounted on the second support 4. When there is one second support 4, the loading bin 51, the unloading bin 52 and the robotic arm 53 are all mounted on the same second support 4. When there are multiple second supports 4, the loading bin 51, the unloading bin 52 and the robotic arm 53 can be mounted on multiple second supports 4 respectively.

[0076] In a further embodiment of this utility model, reference is made to the appendix. Figure 1 and attached Figure 2 As shown, multiple first hoppers 521 are spaced apart, which can increase the number of qualified electrode sheets 200 that the electrode weighing device 100 can store, extend the time required for the first hopper 521 to be full, reduce the frequency of operator downtime to remove qualified electrode sheets 200 from the first hopper 521, and improve the overall efficiency of the electrode weighing device 100. For example, the first hoppers 521 can be two, three, four, or five spaced apart.

[0077] Further, see attached document. Figure 2As shown, the second hopper 522 comprises multiple hoppers, including an overweight hopper 5221 and an underweight hopper 5222. The overweight hopper 5221 stores overweight electrode sheets 200, while the underweight hopper 5222 stores underweight electrode sheets 200. This allows for the classification of electrode sheets 200 that fail the weight test, facilitating subsequent secondary processing and data summarization and analysis. For example, the second hopper 522 can be arranged in two, three, four, or five intervals.

[0078] In a specific example, see Appendix Figure 2 As shown, the weighing assembly 10 includes two first supports 1, each of which is equipped with a weighing module 2. There are two feeding bins 52 corresponding to the weighing modules 2. Each feeding bin 52 includes a first feeding bin 521 and a second feeding bin 522. The two second feeding bins 522 are respectively an overweight bin 5221 and an underweight bin 5222. (Refer to the attached diagram for details.) Figure 2 As shown in direction a), the first hopper 521, the overweight hopper 5221, the loading hopper 51, the underweight hopper 5222, and the first hopper 521 are arranged in sequence, which can optimize the movement of the robotic arm 53 and facilitate the robotic arm 53 to pick up the electrode 200 to be tested from the loading hopper 51 and to transport the weighed electrode 200 to the corresponding first hopper 521, overweight hopper 5221, or underweight hopper 5222.

[0079] In a further embodiment of this utility model, reference is made to the appendix. Figure 2 As shown, the robotic arm 53 includes a motion mechanism 531 and a suction mechanism 532. The suction mechanism 532 is used to pick up and release the electrode 200. The suction mechanism 532 is mounted on the motion mechanism 531, which drives the suction mechanism 532 to move. The motion mechanism 531 can move freely within a geometric plane. The suction mechanism 532, as an end effector, can move to a designated position under the drive of the motion mechanism 531, thereby achieving high-speed and high-precision handling by the robotic arm 53. Preferably, the robotic arm 53 is a four-axis manipulator, capable of handling high-speed and highly repetitive tasks, ensuring the robotic arm 53 can pick up and place the electrode 200.

[0080] It should be noted that the suction mechanism 532 uses a specially designed vacuum suction cup or electrostatic adsorption clamp to ensure the rapid, stable, and non-damaging gripping and release of electrode sheets 200 of various shapes / sizes (including those with tabs). When the suction mechanism 532 uses an electrostatic adsorption clamp, the design needs to consider dust prevention and electrostatic discharge.

[0081] Furthermore, for electrode sheets 200 of different specifications, the suction mechanism 532 can be replaced or the program parameters can be adjusted to quickly adapt to electrode sheets 200 of different sizes, shapes and weights.

[0082] The working steps of the electrode weighing device 100 are as follows:

[0083] Feeding: Send the electrode sheet 200 to be tested to the feeding hopper 51;

[0084] Grab: The motion mechanism 531 drives the suction mechanism 532 to move to the feeding bin 51 and pick up the electrode sheet 200 to be tested;

[0085] Placement: The suction mechanism 532 moves the electrode 200 to be tested to the weighing module 2. The cover 232 opens the opening 2312. The suction mechanism 532 accurately places the lens to be tested at the center of the designated position of the opened weighing unit 21 (this position has been calibrated to ensure repeatability). The suction mechanism 532 releases the electrode 200 and moves it away.

[0086] Stabilization: The cover 232 closes the opening 2312 and waits for the preset stabilization time (this stabilization time is one of the key parameters to ensure accuracy) to allow the reading of the weighing unit 21 to stabilize fully;

[0087] Weighing: Weighing unit 21 collects the weight data of electrode 200 and reads it through the control system;

[0088] Data judgment and recording: The control system compares the detected weight of electrode 200 with the preset acceptable range, judges it as "acceptable", "overweight" or "underweight", and stores the results (weight value, judgment result, timestamp, batch number, etc.) and sends them to the MES system;

[0089] Electrode picking and sorting: The suction structure moves to the weighing module 2, the cover 232 opens the opening 2312, the suction mechanism 532 picks up the electrode 200, the cover 232 closes the opening 2312, and the robotic arm 53 transports the electrode 200 to the corresponding unloading bin 52 (first bin 521, overweight bin 5221 or underweight bin 5222) according to the judgment result.

[0090] Cycle: Repeat the steps to weigh the next electrode 200.

[0091] This utility model also proposes a battery production system having the electrode weighing device 100 of the above embodiments.

[0092] The battery production system according to an embodiment of the present invention includes a coating device, a slitting device, a winding / stacking device, and the aforementioned electrode weighing device 100.

[0093] Specifically, the coating device is used to coat the slurry onto the surface of the current collector; the slitting device (such as a die-cutting machine) is used to cut the wide electrode roll to a specified width, punch out the tab shape, and cut it into single electrodes; the winding / stacking device is used to sequentially wind the positive electrode, separator, and negative electrode into a cylindrical cell or to alternately stack the positive and negative electrode sheets and separator to form a stacked cell structure using a robotic arm; the electrode weighing device 100 is used to receive the electrode sheets 200 from the previous process (slitting device) and weigh them. The electrode sheets 200 that pass the weighing test are then sent to the winding / stacking device for winding or stacking operations. The electrode weighing device 100 of this utility model can simultaneously and efficiently weigh the electrode sheets with the high-speed coating device, slitting device, and winding / stacking device, thereby accelerating the battery production cycle, meeting the high-speed production needs of the battery production system, and matching the expansion needs of battery production capacity.

[0094] According to the battery production system of this utility model embodiment, by providing the above-mentioned electrode weighing device 100, the electrode weighing device 100 is used to receive the electrode 200 from the previous process (slitting device) and weigh and detect it. The electrode 200 that passes the weighing is then sent to the winding / stacking device for winding or stacking operations. The electrode weighing device 100 can synchronously and efficiently weigh the electrode with the high-speed coating device, the slitting device, and the winding / stacking device, thereby accelerating the battery production cycle, meeting the high-speed production needs of the battery production system, and matching the expansion needs of battery production capacity.

[0095] The electrode weighing device 100 and other components and operations of the battery production system according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0096] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0097] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrode weighing device, characterized in that, include: Weighing assembly (10), the weighing assembly (10) includes a first support (1) and a weighing module (2), the weighing module (2) is disposed on the first support (1) and includes a weighing unit (21) for measuring the weight of the electrode (200); The loading and unloading assembly (20) includes a second support (4) and a loading and unloading module (5). The second support (4) is independent of and spaced apart from the first support (1). The loading and unloading module (5) is located on the second support (4) and is used to transport the electrode (200) to the weighing unit (21) and to remove the electrode (200) from the weighing unit (21).

2. The electrode weighing device according to claim 1, characterized in that, The weighing assembly (10) also includes: Damping component (3), which is located at the bottom of the first support (1) and is adapted to be supported on the ground, is used to support the first support (1) and reduce vibration.

3. The electrode weighing device according to claim 2, characterized in that, The damping components (3) are multiple components arranged at intervals; And / or, the damping assembly (3) includes a roller (31) and a damping leg (32), the damping leg (32) being located on one side of the roller (31) and being liftable relative to the roller (31).

4. The electrode weighing device according to claim 1, characterized in that, The weighing module (2) also includes: The base (22) is located on the first support (1), and the weighing unit (21) is placed on the base (22), which is a marble platform.

5. The electrode weighing device according to claim 4, characterized in that, The base (22) is connected to the first bracket (1) by fasteners; And / or, the upper surface of the first support (1) has a recess (11), and at least a portion of the base (22) is located within the recess (11).

6. The electrode weighing device according to claim 1, characterized in that, The weighing module (2) also includes: A windproof cover (23) is provided outside the weighing unit (21).

7. The electrode weighing device according to claim 6, characterized in that, The windproof cover (23) includes: The cover body (231) defines a cavity (2311). The upper surface of the cover body (231) has an opening (2312) that communicates with the cavity (2311). The weighing unit (21) is disposed in the cavity (2311). The opening (2312) is used to allow the electrode (200) to enter and exit the cavity (2311). Cover body (232), which is detachably or movably connected to the cover body (231) for opening and closing the opening (2312).

8. The electrode weighing device according to claim 7, characterized in that, The inner periphery of the opening (2312) has a support ring that extends in the circumferential direction of the opening (2312). When the cover body (232) closes the opening (2312), the lower end face of the cover body (232) is supported on the upper surface of the support ring.

9. The electrode weighing device according to claim 8, characterized in that, The windproof cover (23) also includes: A sealing strip (233) is provided, which is sealed between the lower end face of the cover body (232) and the upper surface of the support ring, and the sealing strip (233) extends in the circumferential direction of the opening (2312).

10. The electrode weighing device according to claim 1, characterized in that, The weighing assembly (10) includes a plurality of first supports (1), and each first support (1) is provided with a weighing module (2).

11. The electrode weighing device according to claim 10, characterized in that, The loading and unloading module (5) includes a robotic arm (53) configured to pick up and place electrode sheets (200) into any of the weighing units (21) by means of movement.

12. The electrode weighing device according to claim 1, characterized in that, The loading and unloading module (5) includes: Feeding bin (51), the feeding bin (51) is used to place the electrode sheet (200) to be tested; The unloading hopper (52) is provided at intervals with the loading hopper (51). The unloading hopper (52) includes a first hopper (521) for placing electrode sheets (200) that have passed the weighing test, and a second hopper (522) for placing electrode sheets (200) that have failed the weighing test. The robotic arm (53) is used to transport the electrode to be tested (200) to the weighing module (2) and to transport the weighed electrode (200) to the unloading bin (52).

13. The electrode weighing device according to claim 12, characterized in that, The first hopper (521) consists of multiple hoppers spaced apart; And / or, the second hopper (522) is multiple and includes an overweight hopper (5221) and an underweight hopper (5222), wherein the overweight hopper (5221) is used to store overweight electrode sheets (200) and the underweight hopper (5222) is used to store underweight electrode sheets (200).

14. The electrode weighing device according to claim 12, characterized in that, The robotic arm (53) includes a motion mechanism (531) and a suction mechanism (532). The suction mechanism (532) is used to suction and release the electrode sheet (200). The suction mechanism (532) is disposed on the motion mechanism (531). The motion mechanism (531) is used to drive the suction mechanism (532) to move.

15. A battery production system, characterized in that, Includes the electrode weighing device (100) according to any one of claims 1-14.

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