Pole piece weighing device and battery production system with same

Abstract

The invention discloses a pole piece weighing device and a battery production system with the same, the pole piece weighing device comprises a weighing assembly, the weighing assembly comprises a first support and a weighing module, and the weighing module is arranged on the first support and comprises a weighing unit used for measuring the weight of a pole piece; and the feeding and discharging assembly comprises a second support and a feeding and discharging module, the second support and the first support are mutually independent and arranged in a spaced mode, and the feeding and discharging module is arranged on the second support and used for conveying the pole pieces to the weighing unit and moving the pole pieces out of the weighing unit. According to the pole piece weighing device, manual intervention, labor cost and personal errors can be reduced, the detection precision of the weighing unit can be considered while high efficiency is achieved, accurate control over the weight of the pole piece is ensured, and the high-speed production requirement of a battery production system is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a pole piece weighing device and a battery production system with the same. BACKGROUND

[0002] In order to guarantee the consistency of key parameters such as the capacity and internal resistance of the battery cell, it is usually necessary to measure the weight of the pole piece during the production and processing of the pole piece to distinguish between qualified products and unqualified products. In the prior art, the pole piece is usually manually weighed by an operator who manually takes the pole piece from a magazine or a conveyor belt, places it on a precision electronic scale, records the weight, and then manually places the pole piece in the next process. This production method has the disadvantages of low efficiency, high labor cost, unstable precision, and cannot meet the high-speed production requirements of the battery production system. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a pole piece weighing device which can reduce manual intervention, reduce labor costs, and ensure accurate control of the weight of the pole piece while maintaining high efficiency to meet the high-speed production requirements of the battery production system.

[0004] The present application also proposes a battery production system comprising the above-mentioned pole piece weighing device.

[0005] The pole piece weighing device according to an embodiment of the present application comprises a weighing assembly comprising a first support and a weighing module, the weighing module being arranged on the first support and comprising a weighing unit for measuring the weight of the pole piece; a feeding and discharging assembly comprising a second support and a feeding and discharging module, the second support being independently and spacedly arranged with the first support, and the feeding and discharging module being arranged on the second support and being used for conveying the pole piece to the weighing unit and discharging the pole piece from the weighing unit.

[0006] The pole piece weighing device according to an embodiment of the present application can replace manual operation to convey the pole piece to the weighing unit and discharge the pole piece from the weighing unit by arranging the feeding and discharging module, which can reduce manual intervention, reduce labor costs, reduce human error, improve detection efficiency, and meet the high-speed production requirements of the battery production system. The weighing module and the feeding and discharging module are arranged on the first support and the second support respectively, and the first support and the second support are independently and spacedly arranged, which can avoid the vibration generated during the operation of the feeding and discharging module from being transmitted to the weighing module, reduce the interference of external factors on the weighing unit, and ensure accurate control of the weight of the pole piece while maintaining high efficiency and detection precision of the weighing unit.

[0007] In addition, the pole piece weighing device according to the present application can further have the following additional technical features.

[0008] In some embodiments, the weighing assembly further comprises a damping assembly arranged at the bottom of the first support and adapted to be supported on the ground for supporting and damping the first support.

[0009] In some embodiments, the damping assembly is a plurality of damping assemblies arranged at intervals; and / or, the damping assembly comprises a roller and a damping leg arranged at one side of the roller and being liftable relative to the roller.

[0010] In some embodiments, the weighing module further comprises a base arranged on the first support, and the weighing unit is placed on the base, and the base is a marble platform.

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

[0012] In some embodiments, the weighing module further comprises a wind shield covering the weighing unit.

[0013] In some embodiments, the wind shield comprises a shield body defining a cavity, and the upper surface of the shield body has an opening in communication with the cavity, and the weighing unit is arranged in the cavity, and the opening is used for the pole piece to enter and exit the cavity; and a cover body detachably connected or movably connected to the shield body for opening and closing the opening.

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

[0015] In some embodiments, the wind shield further comprises a sealing strip sealingly fitted between the lower end surface 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 comprises a plurality of the first supports, and each of the first supports is respectively provided with the weighing module.

[0017] In some embodiments, the feeding and discharging module comprises a mechanical arm configured to be capable of taking and placing the pole piece to and from any of the weighing units by movement.

[0018] In some embodiments, the feeding and discharging module comprises: a feeding bin for placing the to-be-tested pole piece; a discharging bin spaced apart from the feeding bin, the discharging bin comprising a first bin for placing the pole pieces that pass the weighing and a second bin for placing the pole pieces that fail the weighing; and a mechanical arm for conveying the to-be-tested pole piece to the weighing module and conveying the pole pieces that have been weighed to the discharging bin.

[0019] In some embodiments, the first bin is a plurality of bins spaced apart; and / or the second bin is a plurality of bins comprising an overweight bin for storing the pole pieces that are overweight and an underweight bin for storing the pole pieces that are underweight.

[0020] In some embodiments, the mechanical arm comprises a moving mechanism and a suction mechanism for sucking and releasing the pole piece, the suction mechanism being arranged on the moving mechanism, and the moving mechanism being configured to drive the suction mechanism to move.

[0021] The application also provides a battery production system having the above-mentioned embodiments.

[0022] According to the battery production system of the embodiments of the application, the pole piece weighing device is provided, which is configured to receive the pole pieces from the previous process (the slitting device) and weigh the pole pieces, and the pole pieces that pass the weighing are sent to the winding / stacking device for winding or stacking operation. The pole piece weighing device can be synchronized with the high-speed coating device, the slitting device and the winding / stacking device for efficient weighing, which accelerates the production rhythm of the battery and meets the high-speed production requirement of the battery production system and the expansion requirement of the battery production capacity.

[0023] Additional aspects and advantages of the application will be made apparent by the following description and the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0025] Figure 1 is a perspective view of a pole piece weighing device according to an embodiment of the application;

[0026] Figure 2 is a perspective view of a pole piece weighing device according to an embodiment of the application, wherein some cabinet doors, some feeding lifting devices, some discharging lifting devices, a cover body of one wind shield and a cover body of another wind shield are not shown;

[0027] Figure 3 is Figure 2An enlarged view of the portion A;

[0028] Figure 4 is another perspective view of the pole piece weighing device according to an embodiment of the present application, wherein part of the cabinet door, part of the upper feeding lifting device, part of the lower feeding lifting device, a cover body of one of the windproof covers and a cover body of another of the windproof covers are not shown;

[0029] Figure 5 is Figure 4 An enlarged view of the portion B.

[0030] Reference signs:

[0031] 100, pole piece weighing device; 200, pole piece;

[0032] 10, weighing assembly;

[0033] 1, first support; 11, sink groove;

[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, driving motor; 24, damper;

[0035] 3, damping assembly; 31, roller; 32, damping leg;

[0036] 20, feeding and discharging assembly;

[0037] 4, second support; 41, frame; 42, cabinet door;

[0038] 5, feeding and discharging module; 51, upper feeding bin; 511, upper feeding lifting device; 5111, upper feeding motor; 5112, upper feeding screw rod; 512, upper feeding supporting block; 52, lower feeding bin; 521, first feeding bin; 522, second feeding bin; 5221, overweight bin; 5222, underweight bin; 523, lower feeding lifting device; 5231, lower feeding motor; 5232, lower feeding screw rod; 524, lower feeding supporting block; 53, mechanical arm; 531, movement mechanism; 532, suction mechanism. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

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

[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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this invention, 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 invention 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] It can be understood that, compared with the prior art that the operator manually takes the pole piece from the magazine or the conveying belt, places it on the electronic scale, records the weight, and then manually takes the pole piece from the electronic scale, the pole piece weighing device 100 transports the to-be-measured pole piece 200 to the weighing unit 21 through the feeding and discharging module 5, the weighing unit 21 weighs the to-be-measured pole piece 200, and after the weighing is completed, the feeding and discharging module 5 removes the pole piece 200 from the weighing unit 21. On the one hand, automation can be realized, seamlessly integrated into an automatic production line, greatly reducing labor costs, reducing human errors, reducing manual intervention, reducing the risk of pollution of the pole piece 200, improving the yield and safety of the pole piece 200, and ensuring the stability of the precision. On the other hand, by reducing downtime or speed reduction caused by the weighing process, the overall efficiency of the pole piece weighing device 100 can be improved, the production rhythm of the battery can be accelerated, the high-speed production demand of the battery production system can be met, and the expansion demand of the battery capacity can be matched.

[0047] By independently and spacedly arranging the first support 1 and the second support 4, the weighing module 2 is arranged on the first support 1, and the feeding and discharging module 5 is arranged on the second support 4. The vibration generated during the operation of the feeding and discharging module 5 can be avoided from being transmitted to the first support 1 through the second support 4 and then to the weighing module 2, the interference of external factors on the weighing unit 21 is reduced, the detection accuracy of the weighing unit 21 can be ensured, the accurate control of the weight of the pole piece 200 is ensured, the consistency of the key parameters such as the capacity and internal resistance of the battery cell is helped to be ensured, and the performance and service life of the battery pack are ensured.

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

[0049] Further, referring to FIGS. 1 to 4, Figure 1 and FIGS. 5 to 7, 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 and is responsible for providing the stability of the overall structure and the weighing capacity. The cabinet door 42 serves as the openable and closable part of the support and is used to close the internal space of the second support 4. The internal structure of the second support 4 can be protected and the aesthetic appearance can be improved.

[0050] According to the pole piece weighing device 100 provided by the embodiment of the present application, the feeding and discharging module 5 is arranged to replace manual operation to transport the pole piece 200 to the weighing unit 21 and move the pole piece 200 from the weighing unit 21, so as to reduce manual intervention, reduce labor cost, reduce human error, improve detection efficiency, match the high-speed production requirement of the battery production system, and place the weighing module 2 and the feeding and discharging module 5 on the first support 1 and the second support 4, respectively, so that the first support 1 and the second support 4 are independent and arranged at intervals, the vibration generated during the operation of the feeding and discharging module 5 can be prevented from being transmitted to the weighing module 2, and the interference of external factors on the weighing unit 21 is reduced, so that the detection accuracy of the weighing unit 21 can be considered while high efficiency is ensured, and the accurate control of the weight of the pole piece 200 is ensured.

[0051] In some embodiments of the present application, reference is made to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 , and the accompanying drawings Figure 4 As shown in the accompanying drawings, the weighing assembly 10 further comprises a damping assembly 3 arranged at the bottom of the first support 1 and adapted to be supported on the ground, for supporting and damping the first support 1. It can be understood that, on the one hand, the damping assembly 3 can be used to absorb the vibration from the ground, so as to reduce the vibration transmitted to the first support 1, reduce the influence of the vibration on the weighing unit 21, ensure the detection accuracy of the weighing unit 21, and ensure the accurate control of the weight of the pole piece 200; on the other hand, when the ground is slightly inclined or the first support 1 is inclined due to external force, the buffering effect of the damping assembly 3 can help the first support 1 quickly recover balance, avoid the risk of toppling, and improve the stability of the weighing assembly 10. Moreover, long-term vibration can cause structural fatigue of the weighing assembly 10, and the arrangement of the damping assembly 3 can reduce the vibration intensity and reduce the wear of components, thereby relatively prolonging the service life of the whole weighing assembly 10.

[0052] In further embodiments of the present application, reference is made to the accompanying drawings Figure 2 As shown in the accompanying drawings, the damping assembly 3 is arranged at intervals. The arrangement of the plurality of damping assemblies 3 can disperse the weight of the first support 1 and the impact force from the ground to more points, avoid the deformation or toppling risk caused by excessive stress on a single point, and improve the stability of the weighing assembly 10. For example, the damping assembly 3 can be arranged at intervals of two, three, four, five or six. In a specific example, reference is made to the accompanying drawings, the damping assembly 3 is arranged at intervals of four, the projection of the first support 1 on the up-down direction (as shown in the accompanying drawings) is a rectangle, and the four damping assemblies 3 are respectively located at the four corners of the rectangle, which can better provide support and damping effect. Figure 2

[0053] Further, reference is made to the accompanying drawings Figure 5 , and reference is made to the accompanying drawings Figure 4 ​The 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 the present invention, 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 the present invention, 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 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 can be understood that the connection between the base 22 and the first support 1 can be only by fasteners, or only by the limiting of the sink groove 11, or both by the limiting of the sink groove 11 and the fixing by fasteners, which is not limited here.

[0059] In some embodiments of the present application, reference is made to the accompanying drawings Figure 2 As shown in the drawings, the weighing module 2 further comprises a wind shield 23, the wind shield 23 covers the weighing unit 21, and the wind shield 23 is fixed on the base 22 by fasteners, the wind shield 23 and the base 22 can jointly enclose a sealed cavity 2311, and low disturbance airflow control (such as laminar flow) is performed inside to reduce the influence of air flow on weighing and further improve the weighing accuracy. Preferably, the wind shield 23 is made of transparent acrylic material, which can facilitate the observation of the weighing condition of the weighing unit 21.

[0060] In further embodiments of the present application, reference is made to the accompanying drawings Figure 2 As shown in the drawings, the wind shield 23 comprises a cover body 231 and a cover lid 232, the cover body 231 defines the cavity 2311, the upper surface of the cover body 231 has an opening 2312, the opening 2312 communicates with the cavity 2311, the weighing unit 21 is arranged in the cavity 2311, the opening 2312 is used for the pole piece 200 to enter and exit the cavity 2311, and the cover lid 232 is detachably connected or movably connected with the cover body 231 to open and close the opening 2312.

[0061] It can be understood that during the weighing of the weighing unit 21 or during the non-operation time of the pole piece weighing device 100, the cover lid 232 closes the opening 2312, so that the cavity 2311 is sealed, the influence of air flow on weighing is reduced, the weighing accuracy is improved, dust, impurities and the like are prevented from falling into the cavity 2311, the accuracy of the weighing unit 21 is prevented from being affected, and the cleanliness inside the cavity 2311 is ensured; during the taking and placing of the pole piece 200, the cover lid 232 opens the opening 2312, which can facilitate the feeding and discharging module 5 to convey the pole piece 200 to the weighing unit 21 and move the pole piece 200 out of the cavity 2311.

[0062] Further, reference is made to the accompanying drawings Figure 2 As shown in the drawings, the cover lid 232 is rotatably connected with the cover body 231, the wind shield 23 further comprises a driving motor 234, the driving motor 234 is arranged on the cover body 231 and is used to drive the cover lid 232 to rotate to open or close the opening 2312, so that the operator does not need to manually open and close the opening 2312, and the machine does not need to be stopped or slowed down, which can improve the operation safety.

[0063] In still further embodiments of the present application, reference is made to the accompanying drawings Figure 2As shown, the inner periphery of the opening 2312 protrudes a support ring extending along the circumferential direction of the opening 2312, when the cover body 232 closes the opening 2312, the lower end surface of the cover body 232 is supported on the upper surface of the support ring, the support ring can support the cover body 232 when the cover body 232 closes the opening 2312, avoid excessive rotation of the cover body 232 and poor sealing of the opening 2312, guarantee the sealing reliability of the cover body 232 to the opening 2312, avoid the airflow, dust, impurities and the like entering the cavity 2311 through the gap between the cover body 232 and the cover body 231, avoid affecting the weighing precision. Preferably, the support ring is a stainless steel part.

[0064] In still further embodiments of the application, reference is made to the accompanying Figure 2 and the accompanying Figure 3 As shown, the wind shield 23 further comprises a sealing strip 233, the sealing strip 233 is sealingly fitted between the lower end surface of the cover body 232 and the upper surface of the support ring, and 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, avoid the airflow, dust, impurities and the like entering the cavity 2311 through the gap between the cover body 232 and the cover body 231, avoid affecting the weighing precision.

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

[0066] In some embodiments of the application, reference is made to the accompanying Figure 1 As shown, the weighing assembly 10 comprises a plurality of first supports 1, each first support 1 is respectively provided with a weighing module 2, and one weighing module 2 can only weigh one pole piece 200 at the same time. The plurality of first supports 1 can make the pole piece weighing device 100 have multiple weighing modules 2, and simultaneously weigh multiple pole pieces 200, thereby improving the weighing efficiency of the pole piece weighing device 100, speeding up the production rhythm of the battery, meeting the high-speed production demand of the battery production system, and matching the expansion demand of the battery production capacity. For example, the number of first supports 1 can be two, three or four, and the plurality of first supports 1 are arranged along the circumferential direction of the second support 4, which can facilitate the feeding and discharging module 5 to respectively transport the pole pieces 200 to the plurality of weighing units 21 for weighing and remove the pole pieces 200 of the plurality of weighing units 21.

[0067] In a further embodiment of the invention, 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 sheet weighing device 100 of the present invention 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 contamination, 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 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.

[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 the present invention, reference is made to the appendix. Figure 2 and attached Figure 4As shown, the feeding and discharging module 5 includes a feeding bin 51, a discharging bin 52 and a mechanical arm 53. The feeding bin 51 is used for placing the to-be-tested pole piece 200. The feeding bin 51 includes a feeding lifting device 511 and a feeding supporting block 512 drivingly connected with the feeding lifting device 511. The to-be-tested pole piece 200 is placed on the feeding supporting block 512. The feeding lifting device 511 includes a feeding motor 5111 and a feeding screw 5112 drivingly connected with the feeding motor 5111. When the pole piece 200 at the top of the feeding supporting block 512 is sucked away, the feeding supporting block 512 can be driven to rise by one position through cooperation of the feeding motor 5111 and the feeding screw 5112, so as to ensure that the top pole piece 200 is in a position that can be sucked.

[0071] Further, referring to the accompanying drawings Figure 2 and the accompanying drawings Figure 4 As shown, the discharging bin 52 is arranged at intervals with the feeding bin 51 to avoid interference with the taking and placing of the mechanical arm 53. The discharging bin 52 includes a first bin 521 for placing the pole piece 200 that passes the weighing and a second bin 522 for placing the pole piece 200 that fails the weighing. The pole piece 200 that passes the weighing and the pole piece 200 that fails the weighing can be classified and placed, so as to ensure that the pole piece 200 entering the subsequent process is the pole piece 200 that passes the weighing, and the production qualified rate is improved. The first bin 521 includes a discharging lifting device 523 and a discharging supporting block 524 drivingly connected with the discharging lifting device 523. The pole piece 200 that passes the weighing is placed on the discharging supporting block 524. The discharging lifting device 523 includes a discharging motor 5231 and a discharging screw 5232 drivingly connected with the discharging motor 5231. When the discharging supporting block 524 is increased by one pole piece 200, the discharging supporting block 524 can be driven to descend by one position through cooperation of the discharging motor 5231 and the discharging screw 5232, so as to ensure that the top is left with a position that can be discharged.

[0072] Further, referring to the accompanying drawings Figure 2 and the accompanying drawings Figure 4 As shown, the mechanical arm 53 is used for conveying the to-be-tested pole piece 200 to the weighing module 2 and conveying the pole piece 200 that completes the weighing to the discharging bin 52. It can be understood that the mechanical arm 53 moves to the feeding bin 51, sucks one to-be-tested pole piece 200, and then accurately places the to-be-tested pole piece 200 to the center of the specified position of the weighing unit 21 (the position is calibrated to ensure the repeated positioning accuracy). The mechanical arm 53 releases the pole piece 200 and moves away. After a preset time, the weighing is completed. The control system judges whether the pole piece 200 passes the weighing or fails the weighing according to the weighing result. The mechanical arm 53 moves back to the weighing unit 21 to suck the pole piece 200 according to the judgment result of the control system, and carries the pole piece 200 to the corresponding first bin 521 or second bin 522.

[0073] It can be understood that, compared with the prior art that the operator manually takes the pole piece from the magazine or the conveying belt, places it on the electronic scale, records the weight, and then manually takes the pole piece from the electronic scale, the pole piece weighing device 100 of the present application adopts the feeding and discharging assembly 20, the feeding bin 51 can automatically provide the pole piece 200 to be measured, the first bin 521 can automatically collect the pole piece 200 that passes the weighing, and the mechanical arm 53 can be used to deliver the pole piece 200 to be measured to the weighing module 2 and deliver the pole piece 200 that has completed weighing to the discharging bin 52. On the one hand, automation can be realized, labor cost can be greatly reduced, human error can be reduced, manual intervention can be reduced, the risk of pollution of the pole piece 200 can be reduced, the yield and safety of the pole piece 200 can be improved, and the precision stability can be ensured. On the other hand, by reducing the downtime or speed reduction caused by the weighing link, the overall efficiency of the pole piece weighing device 100 can be improved, the production rhythm of the battery can be accelerated, the high-speed production demand of the battery production system can be met, and the expansion demand of the battery capacity can be matched. Moreover, by separately placing the pole piece 200 that passes the weighing and the pole piece 200 that fails the weighing, consistency can be improved, the scrap caused by unqualified weight can be reduced, and the production quality can be ensured.

[0074] Preferably, the first sensor is arranged on the feeding bin 51, and the second sensor is arranged on the first bin 521. By arranging the first sensor, when the feeding bin 51 is empty, a signal can be sent to remind the operator to feed. By arranging the second sensor, when the first bin 521 is full, a signal can be sent to remind the operator to discharge, so as to avoid affecting the normal work of the pole piece weighing device 100 and meet the high-speed production demand of the battery production system.

[0075] Optionally, the feeding and discharging module 5 is arranged on the second support 4. When the second support 4 is one, the feeding bin 51, the discharging bin 52, and the mechanical arm 53 are arranged on the same second support 4. When the second support 4 is multiple, the feeding bin 51, the discharging bin 52, and the mechanical arm 53 can be arranged on multiple second supports 4, respectively.

[0076] In further embodiments of the present application, with reference to the accompanying drawings Figure 1 and the accompanying drawings Figure 2 As shown, the first bin 521 is multiple and is arranged at intervals. The number of pole pieces 200 that pass the weighing and are stored in the pole piece weighing device 100 can be increased, the time required for the first bin 521 to be full can be prolonged, the frequency of the operator stopping to take out the pole pieces 200 that pass the weighing in the first bin 521 can be reduced, and the overall efficiency of the pole piece weighing device 100 can be improved. For example, the first bin 521 can be two, three, four, or five and be arranged at intervals.

[0077] Further, with reference to the accompanying drawings Figure 2As shown, the second hopper 522 is multiple and includes an overweight hopper 5221 and an underweight hopper 5222, the overweight hopper 5221 is used to store the weight-overweight pole piece 200, and the underweight hopper 5222 is used to store the weight-underweight pole piece 200, so that the unqualified pole piece 200 can be classified, which helps the subsequent secondary processing and helps the summary and analysis of data. For example, the second hopper 522 can be two, three, four or five.

[0078] In one specific example, reference is made to the accompanying drawings Figure 2 As shown, the weighing assembly 10 includes two first supports 1, each of which is provided with a weighing module 2, and the lower hopper 52 is one-to-one corresponding to the weighing module 2, each of which includes a first hopper 521 and a second hopper 522, and the two second hoppers 522 are respectively an overweight hopper 5221 and an underweight hopper 5222, along the arrangement direction of the two first supports 1 (referring to the a direction in the accompanying drawings) Figure 2 As shown, the first hopper 521, the overweight hopper 5221, the upper hopper 51, the underweight hopper 5222, and the first hopper 521 are arranged in sequence along the a direction, which can optimize the motion line of the mechanical arm 53, and facilitate the mechanical arm 53 to suck the to-be-tested pole piece 200 from the upper hopper 51 and transport the weighed pole piece 200 to the corresponding first hopper 521, overweight hopper 5221 or underweight hopper 5222.

[0079] In further embodiments of the present application, reference is made to the accompanying drawings Figure 2 As shown, the mechanical arm 53 includes a movement mechanism 531 and a suction mechanism 532, the suction mechanism 532 is used to suck and release the pole piece 200, the suction mechanism 532 is arranged on the movement mechanism 531, the movement mechanism 531 is used to drive the suction mechanism 532 to move, the movement mechanism 531 can move freely in a geometric plane, and the suction mechanism 532 as an end effector can move to a designated position under the drive of the movement mechanism 531, thereby realizing high-speed and high-precision handling of the mechanical arm 53. Preferably, the mechanical arm 53 is a four-axis robot, which can perform high-speed and high-repetitive work, and ensure the pick-and-place of the pole piece 200.

[0080] It should be noted that the suction mechanism 532 adopts a specially designed vacuum chuck or electrostatic adsorption clamp to ensure quick, stable and non-damaging grabbing and releasing of various shapes / sizes (including pole pieces with tabs) of the pole piece 200. When the suction mechanism 532 selects the electrostatic adsorption clamp, dustproof and electrostatic discharge need to be considered in the design.

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

[0082] Working steps of the pole piece weighing device 100:

[0083] Feeding: the to-be-tested pole piece 200 is sent to the feeding bin 51;

[0084] Grabbing: the movement mechanism 531 drives the suction mechanism 532 to move to the feeding bin 51, and the to-be-tested pole piece 200 is sucked;

[0085] Placing: the suction mechanism 532 moves the to-be-tested pole piece 200 to the weighing module 2, the cover body 232 opens the opening 2312, the suction mechanism 532 precisely places the to-be-tested pole piece in the center of the specified position of the opened weighing unit 21 (the position is calibrated to ensure the repeated positioning accuracy), the suction mechanism 532 releases the pole piece 200 and moves away;

[0086] Stabilizing: the cover body 232 closes the opening 2312, and a preset stabilizing time (which is one of the key parameters to ensure accuracy) is waited for, so that the reading of the weighing unit 21 is fully stabilized;

[0087] Weighing: the weighing unit 21 collects the weight data of the pole piece 200 and reads the data through the control system;

[0088] Data determination and recording: the control system compares the detected weight of the pole piece 200 with the preset qualified range, determines whether the pole piece is “qualified”, “overweight” or “underweight”, and stores and sends the results (weight value, determination result, time stamp, batch number, etc.) to the MES system;

[0089] Taking and sorting: the suction structure moves to the weighing module 2, the cover body 232 opens the opening 2312, the suction mechanism 532 sucks the pole piece 200, the cover body 232 closes the opening 2312, and the mechanical arm 53 carries the pole piece 200 to the corresponding unloading bin 52 (the first bin 521, the overweight bin 5221 or the underweight bin 5222) according to the determination result;

[0090] Cycling: repeat the steps to weigh the next pole piece 200.

[0091] The application also provides a battery production system with the pole piece weighing device 100.

[0092] The battery production system according to the application comprises a coating device, a slitting device, a winding / sheeting device and the pole piece weighing device 100.

[0093] Specifically, the coating device is used to apply the slurry on the current collector surface, the slitting device (such as a die cutting machine) is used to cut the wide electrode roll into a specified width, punch out the tab shape and cut into a single electrode sheet, the winding / stacking device is used to wind the positive electrode, the separator and the negative electrode into a cylindrical battery cell in sequence or alternately stack the positive and negative electrode sheets and the separator to form a laminated battery cell structure through a mechanical arm, the electrode sheet weighing device 100 is used to receive the electrode sheet 200 from the previous process (the slitting device) and perform weighing detection, the electrode sheet 200 that passes the weighing detection is sent to the winding / stacking device for winding or stacking operation, the electrode sheet weighing device 100 of the present application can be synchronized with the high-speed coating device, the slitting device and the winding / stacking device for efficient weighing, accelerate the production rhythm of the battery, meet the high-speed production demand of the battery production system and match the expansion demand of the battery production capacity.

[0094] According to the battery production system of the embodiment of the present application, the electrode sheet weighing device 100 is used to receive the electrode sheet 200 from the previous process (the slitting device) and perform weighing detection, the electrode sheet 200 that passes the weighing detection is sent to the winding / stacking device for winding or stacking operation, the electrode sheet weighing device 100 can be synchronized with the high-speed coating device, the slitting device and the winding / stacking device for efficient weighing, accelerate the production rhythm of the battery, meet the high-speed production demand of the battery production system and match the expansion demand of the battery production capacity.

[0095] The other configurations and operations of the electrode sheet weighing device 100 and the battery production system according to the embodiment of the present application are known to those skilled in the art and will not be described in detail here.

[0096] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0097] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pole piece weighing device, characterized by, The application relates to a weighing assembly (10) comprising: a first support (1) and a weighing module (2) arranged on the first support (1) and comprising a weighing unit (21) for measuring the weight of a pole piece (200); a feeding and discharging assembly (20) comprising a second support (4) and a feeding and discharging module (5), wherein the second support (4) is arranged independently of and spaced apart from the first support (1), and the feeding and discharging module (5) is arranged on the second support (4) and is used for conveying the pole piece (200) to the weighing unit (21) and discharging the pole piece (200) from the weighing unit (21).

2. The pole piece weighing device of claim 1, wherein, The weighing assembly (10) further comprises: a damping assembly (3) arranged at the bottom of the first support (1) and adapted to be supported on the ground, and used for supporting and damping the first support (1).

3. The pole piece weighing device of claim 2, wherein, The damping assembly (3) is a plurality of damping assemblies arranged at intervals. The damping assembly (3) comprises a roller (31) and a damping leg (32), wherein the damping leg (32) is arranged on one side of the roller (31) and is liftable relative to the roller (31).

4. The pole piece weighing device of claim 1, wherein, The weighing module (2) further comprises: a base (22) arranged on the first support (1), wherein the weighing unit (21) is arranged on the base (22), and the base (22) is a marble platform.

5. The pole piece weighing device of claim 4, wherein, The base (22) is connected to the first support (1) by a fastener. The upper surface of the first support (1) is provided with a recess (11), and at least part of the base (22) is arranged in the recess (11).

6. The pole piece weighing device of claim 1, wherein, The weighing module (2) further comprises: a wind shield (23) arranged outside the weighing unit (21).

7. The pole piece weighing device of claim 6, wherein, The wind shield (23) comprises: a shield body (231) defining a cavity (2311), wherein the upper surface of the shield body (231) is provided with an opening (2312) in communication with the cavity (2311), the weighing unit (21) is arranged in the cavity (2311), and the opening (2312) is used for the pole piece (200) to enter and exit the cavity (2311); a shield cover (232) detachably connected or movably connected to the shield body (231) and used for opening and closing the opening (2312).

8. The pole piece weighing device of claim 7, wherein, The inner periphery of the opening (2312) is provided with a support ring extending in the circumferential direction of the opening (2312), and the lower end surface of the shield cover (232) is supported on the upper surface of the support ring when the shield cover (232) closes the opening (2312).

9. The pole piece weighing device of claim 8, wherein, The wind shield (23) further comprises: a sealing strip (233) sealingly fitted between the lower end surface of the shield cover (232) and the upper surface of the support ring and extending in the circumferential direction of the opening (2312).

10. The pole piece weighing device of claim 1, wherein, The weighing assembly (10) comprises a plurality of the first supports (1), and each of the first supports (1) is respectively provided with the weighing module (2).

11. The pole piece weighing device of claim 10, wherein, The feeding and discharging module (5) comprises a mechanical arm (53) configured to take and place the pole piece (200) to any of the weighing units (21) through movement.

12. The pole piece weighing device of claim 1, wherein, The feeding and discharging module (5) comprises: a feeding bin (51) for placing the pole piece (200) to be tested; a discharging bin (52) spaced apart from the feeding bin (51), the discharging bin (52) comprising a first bin (521) for placing the pole piece (200) that passes the weighing, and a second bin (522) for placing the pole piece (200) that fails the weighing; a mechanical arm (53) for conveying the pole piece (200) to be tested to the weighing module (2) and conveying the pole piece (200) after the weighing to the discharging bin (52).

13. The pole piece weighing device of claim 12, wherein, The first bin (521) is a plurality of bins spaced apart; and / or, the second bin (522) is a plurality of bins comprising an overweight bin (5221) for storing the pole piece (200) with overweight, and an underweight bin (5222) for storing the pole piece (200) with underweight.

14. The pole piece weighing device of claim 12, wherein, The mechanical arm (53) comprises a movement mechanism (531) and a suction mechanism (532), the suction mechanism (532) is used for sucking and releasing the pole piece (200), the suction mechanism (532) is arranged on the movement mechanism (531), and the movement mechanism (531) is used for driving the suction mechanism (532) to move.

15. A battery production system characterized by comprising: The pole piece weighing device (100) according to any one of claims 1-14. The pole piece weighing device (100) according to any one of claims 1-14.

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