Multi-piece composite unit piece production device, piece lamination system and pole group manufacturing method

Abstract

The invention relates to the technical field of batteries, in particular to a multi-piece composite unit piece manufacturing device, a piece stacking system and a pole group manufacturing method. The first discharging mechanism and the composite assembly are arranged at an interval; the film covering assembly is arranged between the first discharging mechanism and the compounding assembly; the second discharging mechanism and the composite assembly are arranged at an interval; and the insulating film cutter and the composite assembly are arranged at an interval. According to the multi-piece composite unit piece manufacturing device, in the piece manufacturing stage, a plurality of first pole pieces and a plurality of second pole pieces can be manufactured at a time, so that the piece manufacturing efficiency is remarkably improved, sufficient pole piece reserve is provided for subsequent operations such as piece stacking and hot pressing, and the production efficiency of pole set manufacturing equipment is improved; and the output can be multiplied without increasing the operation speed of each processing flow, so that the operation efficiency of the pole group manufacturing equipment is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a multi-cell composite cell fabrication apparatus, a stacking system, and a method for manufacturing electrode groups. Background Technology

[0002] Currently, thermal lamination, as a lamination method, involves first thermally bonding one polarity electrode to an insulating film to form a thermally bonded unit, which is then alternately laminated with another polarity electrode to form an electrode assembly. Its advantage lies in enabling 100% inspection of the positive and negative electrodes and the insulating film, eliminating the risk of insulating film wrinkles and improving cell safety. However, compared to winding methods, traditional thermal lamination and 'Z' lamination processes have lower production efficiency and higher production costs. Therefore, further improving the efficiency of lamination equipment is crucial to reducing production costs.

[0003] The efficiency and output of the film preparation process are the front-end processes of the stacking equipment. The film preparation efficiency greatly affects the overall processing efficiency of the stacking equipment. In the current technology, efficiency is usually improved by increasing the processing speed of the film preparation process. However, with the advancement of technology, it is difficult to significantly increase the film preparation speed, which also restricts the improvement of the overall efficiency of the stacking equipment. Summary of the Invention

[0004] The purpose of this application is to provide a multi-chip composite unit wafer fabrication apparatus, a wafer stacking system, and a method for manufacturing electrode groups, so as to solve to some extent the technical problem of how to improve the processing efficiency of wafer stacking equipment in the wafer fabrication stage in the prior art.

[0005] This application provides a multi-layer composite unit fabrication apparatus, comprising: Composite components; A first feeding mechanism is provided at an interval from the composite component, and the first feeding mechanism is used to supply a first multi-piece unit to the composite component; A coating assembly is disposed between the first feeding mechanism and the composite assembly, and the coating assembly is used to attach insulating tape to the first multi-piece unit before the first multi-piece unit enters the composite assembly; The second feeding mechanism is arranged at an interval from the composite component, and the second feeding mechanism is used to supply the composite component with a second multi-piece unit. An insulating film cutter is provided at an interval from the composite component.

[0006] In the above technical solution, the first feeding mechanism further includes: First pole coil blanking component; A first slitting device is provided at an interval from a first electrode roll unloading component. The first electrode roll unloading component is used to feed a first electrode roll to the first slitting device. The first slitting device cuts the first electrode roll along its length direction. A first cutting device is provided at intervals from the first slitting device along the conveying direction of the first electrode roll; the first cutting device cuts the first electrode roll along the width direction of the first electrode roll.

[0007] In any of the above technical solutions, the second feeding mechanism further includes: Second pole coil blanking component; A second slitting device is provided at an interval from the second pole roll unloading component. The second pole roll unloading component is used to feed the second pole roll to the second slitting device. The second slitting device cuts the second pole roll along its length direction. The second cutting device is arranged at intervals from the second slitting device along the conveying direction of the second pole roll; the second cutting device cuts the second pole roll along the width direction of the second pole roll.

[0008] In any of the above technical solutions, the multi-wafer composite unit fabrication device further includes: An electrostatic platform is provided at the entrance of the composite component; A first conveying device is disposed between the first cutting device and the electrostatic platform; The second transport device is disposed between the second cutting device and the electrostatic platform.

[0009] In any of the above technical solutions, the coating component further includes: A first coating component, comprising an insulating tape, is spaced apart from the first electrode roll unloading component. The first coating component is used to lay the insulating tape on one side surface of the first electrode roll that has passed through the first cutting device. The second coating component includes another insulating tape. The second coating component is spaced apart from the first electrode roll unloading component. The second coating component is used to lay the insulating tape on the other side surface of the first electrode roll that has passed through the first cutting device.

[0010] This application also provides a wafer stacking system, including the multi-wafer composite unit wafer fabrication device described in any of the above technical solutions. The number of the multi-wafer composite unit wafer fabrication devices is at least two. Therefore, this wafer stacking system has all the beneficial technical effects of the multi-wafer composite unit wafer fabrication device, which will not be repeated here.

[0011] In the above technical solution, the stacking system further includes: A stacking device, wherein the stacking device is spaced apart from the insulating film cutter; A hot pressing device, wherein the hot pressing device is disposed at an interval from the stacking device; The electrode component cutting device is arranged at an interval from the hot pressing device.

[0012] This application also provides a method for fabricating an electrode assembly, applicable to the stacking system described in the above technical solution.

[0013] The electrode assembly fabrication method includes the following steps: S100: Fabricate the first multi-cell unit and transport the first multi-cell unit to the composite assembly along the first direction; S200, The first multi-piece unit includes a first surface and a second surface distributed along a third direction, and insulating tape is attached to the first surface and the second surface respectively; S300: Fabricate a second multi-piece unit, and convey the second multi-piece unit to the composite assembly along the first direction. The first multi-piece unit and the second multi-piece unit are combined in the composite assembly to form a multi-piece composite strip. S400: Cut the multi-piece composite strip into multi-piece composite units that are spaced apart along the first direction. The multiple multi-piece composite units are stacked one by one along the third direction; Fabricate a dual-layer composite unit L, and finally stack a layer of dual-layer composite units on the stacked multi-layer composite units to form a multi-layer pole group. S500, the multi-electrode group is divided into single-electrode groups that are spaced apart along the second direction.

[0014] In the above technical solution, step S100 further includes: S101. Release the first electrode roll along the first direction, divide the first electrode roll into first electrode roll strips spaced apart along the second direction, and cut the first electrode roll strips along the third direction to obtain the first multi-piece unit, the first multi-piece unit including the first electrode sheet.

[0015] In any of the above technical solutions, step S300 further includes: S301. Release the second electrode roll along the first direction, divide the second electrode roll into second electrode roll strips spaced apart along the second direction, and cut the second electrode roll strips along the third direction to obtain the second multi-piece unit, the second multi-piece unit including a second electrode with the opposite polarity to the first electrode; S302. The second multi-piece unit and the first multi-piece unit are stacked in the composite component and thermally bonded to obtain the multi-piece composite strip.

[0016] In any of the above technical solutions, step S400 further includes: cutting the multiple composite strips using an insulating film cutter, wherein the length of the insulating film cutter extends along the second direction; Step S500 includes: cutting the multiple electrode groups using an electrode group cutting device, wherein the length of the electrode group cutting device extends along the first direction; The first direction, the second direction, and the third direction are perpendicular to each other.

[0017] Compared with the prior art, the beneficial effects of this application are as follows: The multi-piece composite unit fabrication apparatus provided in this application includes: a composite assembly; a first feeding mechanism, which is spaced apart from the composite assembly and is used to supply a first multi-piece unit to the composite assembly; a coating assembly, which is disposed between the first feeding mechanism and the composite assembly and is used to attach insulating tape to the first multi-piece unit before it enters the composite assembly; a second feeding mechanism, which is spaced apart from the composite assembly and is used to supply a second multi-piece unit to the composite assembly; and an insulating film cutter, which is spaced apart from the composite assembly.

[0018] The multi-electrode composite unit fabrication apparatus provided in this application can produce multiple first electrode sheets and multiple second electrode sheets at a time during the fabrication stage, thereby significantly improving the fabrication efficiency and providing sufficient electrode sheet reserves for subsequent operations such as stacking and hot pressing. This, in turn, improves the production efficiency of the electrode assembly fabrication equipment. It can achieve a multiple increase in output without increasing the operating speed of each processing step, thus significantly improving the operating efficiency of the electrode assembly fabrication equipment.

[0019] The stacking system provided in this application includes the multi-wafer composite unit wafer fabrication device described above. Therefore, the multi-wafer composite unit wafer fabrication device significantly improves wafer fabrication efficiency and output during the wafer fabrication stage. At the same time, in the wafer stacking process, by setting up multiple stacking sections to match the production capacity of the wafer fabrication stage, multiple stacking sections can work simultaneously during the wafer stacking stage, which can significantly improve the overall efficiency of the stacking system without relying on wafer fabrication speed and stacking speed.

[0020] The electrode assembly manufacturing method provided in this application can not only produce the target product, the finished single electrode assembly N, but also produce a variety of intermediate products such as the first electrode, the second electrode, the first multi-electrode unit, the second multi-electrode unit, the multi-electrode composite unit, the double-electrode composite unit L, and the multi-electrode assembly K. The manufacturing process has strong continuity and high utilization rate, which significantly improves production efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the stacking system provided in an embodiment of this application; Figure 2 Another schematic diagram of the multi-chip composite unit fabrication apparatus provided in the embodiments of this application; Figure 3 A schematic diagram of the bipolar assembly fabrication process of the multi-chip composite unit fabrication apparatus provided in this application embodiment; Figure 4 This is a schematic diagram of the stacking process of the multi-wafer composite unit wafer fabrication apparatus provided in the embodiments of this application; Figure 5 This is a top view of the stacking process of the multi-composite unit wafer fabrication apparatus provided in the embodiments of this application.

[0023] Figure label: 100 - Multi-piece composite unit sheet making device; 1 - First electrode roll unloading component; 2 - First slitting device; 3 - First cutting device; 4 - First coating component; 5 - Second coating component; 6 - Composite assembly; 7 - Electrostatic platform; 8 - Second electrode roll unloading component; 9 - Second slitting device; 10 - Second cutting device; 11 - Insulating film cutter; 12 - Stacking section; 13 - First alignment section; 14 - Second alignment section; 15 - Transfer device; 16 - Hot press; 17 - Feeding device; 18 - ... - Feeding device, 19-Electrode group cutting device, 20-Electrode group feeding device, 21-First conveying device, 22-Second conveying device, A-First electrode roll, B-First electrode roll material strip, C-Second electrode roll, D-Second electrode roll material strip, E-First electrode sheet, F-Second electrode sheet, G-Insulating material strip, I-Multi-piece composite unit, J-Multi-piece composite material strip, K-Multi-piece electrode group, L-Double-piece composite unit, M-Insulating film, N-Single electrode group, a-First direction, b-Second direction, c-Third direction. Detailed Implementation

[0024] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0025] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0026] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] The following reference Figures 1 to 5 This application describes the multi-chip composite unit fabrication apparatus, stacking system, and electrode assembly fabrication method according to embodiments of the present application.

[0030] Firstly, in Example 1, see... Figures 2 to 5As shown, Embodiment 1 of this application provides a multi-layer composite unit fabrication apparatus. This multi-layer composite unit fabrication apparatus 100 includes: a composite assembly 6, a first feeding mechanism, a coating assembly, a second feeding mechanism, and an insulating film cutter 11. The first feeding mechanism is spaced apart from the composite assembly 6 and is used to feed a first multi-layer unit to the composite assembly 6. The second feeding mechanism is also spaced apart from the composite assembly 6 and is used to supply a second multi-layer unit to the composite assembly 6. It should be noted that the polarities of the first and second multi-layer units are opposite. The coating assembly is used to coat the first multi-layer unit with insulating film before it reaches the composite assembly 6. Insulating material tape G is attached to the large surfaces of both sides of the unit. Then, the first multi-piece unit with insulating material tape G attached to the large surfaces of both sides is laminated together with the second multi-piece unit in the composite assembly 6. In the composite assembly 6, the first multi-piece unit is located below the second multi-piece unit, forming a multi-piece composite material tape J with the structure of second multi-piece unit-insulating material tape G-first multi-piece unit-insulating material tape G. Then, the multi-piece composite material tape J leaves the composite assembly 6 and is conveyed to the insulating film cutter 11. The insulating film cutter 11 cuts the insulating material tape G between any two adjacent first multi-piece units with second multi-piece units stacked on top of each other, thereby cutting the multi-piece composite material tape J into multiple multi-piece composite units I.

[0031] Specifically, the first unloading mechanism includes: a first pole roll unloading component 1, a first slitting device 2, and a first cutting device 3. The first pole roll unloading component 1 includes a first roller and a first pole roll A wound on the first roller. When the first roller is started, the first pole roll A can be released one turn at a time. The first slitting device 2 is arranged at intervals with the first roller along the release direction of the first pole roll A, so that the first pole roll A passes through the first slitting device 2 first during the conveying process. The first slitting device 2 includes a cutter shaft and a cutter. The length of the cutter shaft of the first slitting device 2 extends along the width direction of the first pole roll A. The cutter can cut the first pole roll A in the middle width. As the first pole roll A is gradually conveyed toward the composite component 6, the cutter divides the first pole roll A into two first pole roll material strips B of the same width along its width.

[0032] The first cutting device 3 and the first splitting device 2 are arranged at intervals along the conveying direction of the first pole roll A. The first pole roll A, which is split into two, is conveyed to the first cutting device 3. The first cutting device 3 simultaneously cuts two first pole roll material strips B along the width direction of the first pole roll A, thereby cutting the two first pole roll material strips B into several groups of first multi-piece units containing the first pole piece E.

[0033] Optionally, the first feeding mechanism also includes a correction device and a detection device, so that the qualified products of the first multi-unit produced by the first feeding mechanism after correction, foreign object control and defect detection are transported to the composite component 6.

[0034] Furthermore, the coating assembly includes a first coating component 4 and a second coating component 5. The first coating component 4 includes a second roller and an insulating tape G wound on the second roller. The second coating component 5 includes a third roller and an insulating tape G wound on the third roller. The second roller and the third roller are respectively spaced apart from the first cutting device 3. The insulating tape G released by the second roller can cover the upper surface of all the first multi-piece units, and the insulating tape G released by the third roller can cover the lower surface of all the first multi-piece units, so that each first multi-piece unit is attached with the insulating tape G to form a composite tape with the structure of insulating tape G-first multi-piece unit-insulating tape G.

[0035] Furthermore, the multi-piece composite unit fabrication apparatus 100 also includes an electrostatic platform 7 and a first transport device 21. The composite component 6 includes a thermal composite cavity with an inlet and an outlet. The electrostatic platform 7 is disposed at the inlet of the thermal composite cavity. The first transport device 21 is disposed between the first cutting device 3 and the electrostatic platform 7. The first transport device 21 is used to transfer the first multi-piece unit to the electrostatic platform 7. Through electrostatic adsorption, the insulating material tape G released by the first coating component 4 and the second coating component 5 can be respectively attached to the first multi-piece unit.

[0036] Furthermore, the second unloading mechanism includes: a second pole roll unloading component 8, a second slitting device 9, and a second cutting device 10. Similar to the first unloading mechanism, the second pole roll unloading component 8 is used to release the second pole roll C. The second slitting device 9 divides the second pole roll C into two parts at the middle width position to form two second pole roll material strips D. Subsequently, the second cutting device 10 divides the two second pole roll material strips D into several groups of second multi-piece units containing second pole pieces F. This is fully understood by those skilled in the art and will not be described in detail.

[0037] Furthermore, the multi-piece composite unit fabrication apparatus 100 also includes a second transport device 22, which is disposed between the second cutting device 10 and the electrostatic platform 7. The second transport device 22 is used to place the second multi-piece unit on the first multi-piece unit of the composite strip on the electrostatic platform 7, thereby adsorbing the second multi-piece unit and the first multi-piece unit together by electrostatic adsorption, and separating them by the insulating strip G, thereby forming a multi-piece composite strip J.

[0038] Optionally, the second feeding mechanism also includes a correction device and a detection device.

[0039] It should be noted that there is at least one first electrode roll unloading component 1 and at least one second electrode roll unloading component 8. When there are two or more first electrode roll unloading components 1, all first electrode roll unloading components 1 are arranged sequentially along the width direction of the first electrode roll A. The same applies when there are two or more second electrode roll unloading components 8.

[0040] Furthermore, the insulating film cutter 11 is a common cutter used in the prior art for cutting insulating film M. After the multiple composite strips J flow out of the outlet of the composite component 6, they are conveyed to the insulating film cutter 11. The blade length of the insulating film cutter 11 extends along the width direction of the multiple composite strips J. The insulating film cutter 11 reciprocates in the vertical direction to cut the insulating strips G at the middle position of any two adjacent stacked first multiple units, thereby cutting the multiple composite strips J into several multiple composite units I with the structure of second multiple unit-insulating film M-first multiple unit-insulating film M.

[0041] It should be noted that the first electrode E and the second electrode F have opposite polarities, one of which is a positive electrode and the other is a negative electrode. In this embodiment, the first electrode E can optionally be a negative electrode and the second electrode F can optionally be a positive electrode. Therefore, the multi-layer composite unit fabrication apparatus 100 provided in this embodiment can fabricate a multi-layer composite unit I with a structure of dual positive electrode unit - insulating film M - dual negative electrode unit - insulating film M.

[0042] In addition, either the first feeding mechanism or the second feeding mechanism can operate independently, and the coating assembly operates synchronously with the first feeding mechanism, so that the multi-sheet composite unit fabrication device 100 can also independently produce multiple positive electrode sheets, or a dual-sheet composite unit L with a dual negative electrode sheet structure covered with an insulating film M.

[0043] Example 2: Example 2 of this application provides another multi-chip composite unit fabrication apparatus. This multi-chip composite unit fabrication apparatus includes all the contents of the multi-chip composite unit fabrication apparatus 100 in Example 1 above, except that: in this embodiment, the first electrode E is a positive electrode and the second electrode is a negative electrode. That is, in this embodiment, when the first feeding mechanism, the second feeding mechanism, and the coating assembly are running simultaneously, the multi-chip composite unit fabrication apparatus 100 can fabricate a multi-chip composite unit with a structure of dual negative electrode unit-insulating film-dual positive electrode unit-insulating film; when the second feeding mechanism stops, the first feeding mechanism and the coating assembly can cooperate to fabricate multiple dual positive electrode units coated with insulating film; when the first feeding mechanism and the coating assembly stop, the second feeding mechanism can fabricate multiple dual negative electrode units.

[0044] Other identical content will not be repeated here, as those skilled in the art will fully understand it.

[0045] In summary, the multi-electrode composite unit fabrication apparatus provided in this application can produce multiple first electrodes and multiple second electrodes in a single fabrication stage, thereby significantly improving fabrication efficiency and providing sufficient electrode reserves for subsequent operations such as stacking and hot pressing. This, in turn, improves the production efficiency of the electrode assembly fabrication equipment. It can achieve a multiple increase in output without increasing the operating speed of each processing step, thus significantly improving the operating efficiency of the electrode assembly fabrication equipment.

[0046] Secondly, such as Figure 1 As shown, embodiments of this application also provide a stacking system, including the multi-wafer composite unit wafer fabrication apparatus 100 described in any of the above embodiments, and thus possesses all the beneficial technical effects of the multi-wafer composite unit wafer fabrication apparatus 100, which will not be repeated here.

[0047] This wafer stacking system also includes a wafer stacking device, which includes at least one wafer stacking station. Each wafer stacking station includes a correction section and a wafer stacking section 12. The correction section is located on the side of the wafer stacking section 12. Optionally, this wafer stacking system includes at least two multi-wafer composite unit wafer fabrication devices 100, and each multi-wafer composite unit wafer fabrication device 100 is equipped with a correction section, such as... Figure 1 As shown, taking two multi-piece composite unit fabrication devices 100 as an example, in this embodiment, there are also two correction sections, namely the first correction section 13 and the second correction section 14, and the stacking section 12 is disposed between the first correction section 13 and the second correction section 14.

[0048] Furthermore, the multi-wafer composite unit wafer fabrication apparatus 100 also includes transfer devices 15. The number of transfer devices 15 is adapted to the number of multi-wafer composite unit wafer fabrication apparatuses 100, and a transfer device 15 is provided between each multi-wafer composite unit wafer fabrication apparatus 100 and the stacking device. A first correction unit 13 is located near one of the transfer devices 15, and a second correction unit 14 is located near the other transfer device 15. The number of stacking stations is configured according to the production capacity and expected output. Optionally, the transfer device 15 is provided with a buffer hopper.

[0049] Preferably, both the first correction part 13 and the second correction part 14 are provided with correction components. The stacking section 12 is equipped with a primary handling robot and a secondary handling robot. Optionally, both the primary and secondary handling robots are PNP robots. During the stacking operation, the primary handling robot uses negative pressure to pick up a certain number of multi-composite units I from one of the transfer devices 15 or from the buffer hopper. After the suction plate of the primary handling robot changes its pitch, it transports the multi-composite units I to the first correction section 13. A camera above the first correction section 13 takes pictures of the multi-composite units I for positioning. Then, the correction device performs a correction action to adjust the posture of the multi-composite units I. Similarly, the secondary handling robot transports the corrected multi-composite units I from the second correction section 14 to the stacking section 12, so that the multi-composite units I that have been positioned and corrected are stacked alternately on the stacking section 12. By cyclically picking up and putting out materials, the stacking can be completed alternately on the stacking section 12. When a certain number of layers are stacked, a final layer of double-composite units L is placed to obtain the stacked multi-pole group K.

[0050] Furthermore, the multi-electrode composite unit fabrication apparatus 100 also includes a hot pressing device and a feeding device 17. The hot pressing device is spaced apart from the stacking device, and the feeding device 17 is located between the stacking device and the hot pressing device. Specifically, the feeding device 17 can be a robotic arm used to feed the multi-electrode assembly K before hot pressing. The hot pressing device has at least one hot press 16, and each hot press 16 can hot press at least one multi-electrode assembly K at a time. The number of hot presses 16 can be configured according to the production capacity and efficiency of the fabrication and stacking process. The feeding device 17 conveys the multi-electrode assembly K to each hot press 16, and then the hot press 16 heats and pressurizes the multi-electrode assembly K to harden the loosely stacked multi-electrode assembly K.

[0051] Optionally, a conveyor line is provided on the side of the feeding device 17, and the multi-plate electrode group K stacked by the stacking device is conveyed to the conveyor line so that the feeding device 17 can pick it up and distribute it to each hot press 16.

[0052] Furthermore, the electrode assembly manufacturing equipment also includes a feeding device 18 and an electrode assembly cutting device 19. The electrode assembly cutting device 19 is spaced apart from the hot pressing device, and the feeding device 18 is located between the hot pressing device and the electrode assembly cutting device 19. Specifically, the feeding device 18 can be a robotic arm commonly used in the art, used to transfer the hot-pressed multi-piece electrode assembly K to the electrode assembly cutting device 19, where the electrode assembly cutting device 19 cuts the multi-piece electrode assembly K along the middle position after hot pressing and hardening, thereby dividing the multi-piece electrode assembly K into two single-electrode assemblies N.

[0053] Furthermore, the electrode assembly manufacturing equipment also includes an electrode assembly transfer device and an electrode assembly unloading mechanism. The electrode assembly unloading mechanism includes: an electrode assembly unloading device 20, an unloading conveyor line, and a waste material conveyor belt. The electrode assembly unloading device 20 can be a four-axis robot commonly used in the art. The electrode assembly unloading device 20, the unloading conveyor line, and the waste material conveyor belt are arranged at intervals. Multiple electrode assemblies K transferred by the electrode assembly unloading device 20 are buffered on the electrode assembly transfer device, and then successively cut by the electrode assembly cutting device 19 to obtain multiple finished single electrode assemblies N with a structure of positive electrode sheet-insulating film M-negative electrode sheet-insulating film M… Optionally, the electrode assembly transfer device can be, but is not limited to, a belt.

[0054] In addition, the electrode assembly unloading device 20 is equipped with a logistics line tray and an adhesive application station for affixing QR codes to the single electrode assembly N on its side. The unloading conveyor line is equipped with a detection device. The detection device can be a CCD camera, used to perform short-circuit detection, appearance inspection, etc., on the two large surfaces of the single electrode assembly N. The electrode assembly unloading device 20 can pick up qualified single electrode assemblies N as finished products and place them at the adhesive application station, where a QR code containing information is affixed to each single electrode assembly N.

[0055] After being tested by the testing device, qualified finished single-electrode group N is transferred from the electrode group unloading device 20 to the adhesive application station and finally to the logistics line pallet, while defective products are transferred to the waste conveyor belt.

[0056] In summary, the stacking system provided in this application significantly improves film production efficiency and output during the film production stage. Furthermore, by setting up multiple stacking sections to match the production capacity of the film production stage, multiple stacking sections can work simultaneously during the stacking stage, thereby significantly improving the overall efficiency of the stacking system without having to consider film production speed and stacking speed.

[0057] Thirdly, embodiments of this application also provide a method for fabricating an electrode assembly. This method is applicable to the aforementioned stacking system and specifically includes the following steps: S100. Fabricate the first multi-cell unit and transport the first multi-cell unit to the composite component along the first direction a.

[0058] S100 includes the following steps: S101. Release the first electrode roll A along the first direction a, divide the first electrode roll A into first electrode roll strips B spaced apart along the second direction b, and cut the first electrode roll strips B along the third direction c to obtain a first multi-piece unit, the first multi-piece unit including a plurality of first electrode pieces E.

[0059] Specifically, the first feeding mechanism releases the first electrode roll A toward the composite component 6 along the first direction a, where the first direction a is specifically the length direction of the first electrode roll A; the first electrode roll A can pass through the first slitting device 2, where the first slitting device 2 cuts the first electrode roll A. The first slitting device 2 has a blade extending along the first direction a, so that when the first electrode roll A passes through the first slitting device 2, it is cut into first electrode roll material strips B that are spaced apart along the second direction b, where the second direction b is specifically the width direction of the first electrode roll A, and the second direction b is perpendicular to the first direction a.

[0060] S200, the first multi-piece unit includes a first surface and a second surface distributed along a third direction c, and an insulating tape G is attached to the first surface and the second surface.

[0061] Specifically, the third direction c is the thickness direction of the first electrode roll A. Optionally, in this embodiment, the third direction c is also a vertical direction. The third direction c, the second direction b, and the first direction a are perpendicular to each other. The first surface is the upper surface of the first multi-piece unit, and the second surface is the lower surface of the first multi-piece unit. The first coating member 4 attaches the insulating tape G to the first surface of all the first multi-piece units, and the second coating member 5 attaches the insulating tape G to the second surface of all the first multi-piece units, thereby obtaining a composite tape with the structure of insulating tape G-first multi-piece unit-insulating tape G.

[0062] S300, Fabricate the second multi-piece unit; convey the second multi-piece unit to the composite assembly 6 along the first direction a, and the first multi-piece unit and the second multi-piece unit are combined in the composite assembly to form a multi-piece composite strip.

[0063] Specifically, S300 includes the following steps: S301. Release the second electrode roll C along the first direction a, divide the second electrode roll C into second electrode roll strips D spaced apart along the second direction b, and cut the second electrode roll strips D along the third direction c to obtain a second multi-piece unit. The second multi-piece unit includes multiple second electrode pieces F, and the polarity of the second electrode pieces F is opposite to that of the first electrode piece E.

[0064] Specifically, the second feeding mechanism releases the second pole roll C towards the composite component 6 along the first direction a. During the conveying process of the second pole roll C, the second pole roll C passes through the second slitting device 9. The blade length of the second slitting device 9 extends along the first direction a, thereby cutting the second pole roll C into second pole roll material strips D that are spaced apart along the second direction b. Subsequently, the second cutting device 10 reciprocates along the third direction c, and the blade length of the second cutting device 10 extends along the second direction b, so that the second cutting device 10 can simultaneously cut each second pole roll D to divide the second pole roll D into a second multi-piece unit containing the second pole piece F.

[0065] S302, the composite component 6 includes a thermal bonding cavity. A first multi-piece unit and a second multi-piece unit stacked along the third direction c enter the thermal bonding cavity. Optionally, the second multi-piece unit is stacked on top of the first multi-piece unit, and a first electrode E is disposed directly below each second electrode F, so that the first multi-piece unit and the second multi-piece unit can be thermally bonded in the thermal bonding cavity, and the two are separated by an insulating material tape G, thereby forming a multi-piece composite material tape J.

[0066] S400, Cut the multi-piece composite strip J into multi-piece composite units I that are spaced apart along the first direction a; A double-layer composite unit L is fabricated, and a final layer of double-layer composite units is stacked on top of the already stacked multi-layer composite units I to fabricate a multi-layer pole group K.

[0067] Specifically, S400 includes the following steps: S401. Use an insulating film cutter 11 to cut multiple composite strips J, with the blade length of the insulating film cutter 11 extending along the second direction b.

[0068] Specifically, the insulating film cutter 11 reciprocates along the third direction c, and the blade length of the insulating film cutter 11 extends along the second direction b. When the insulating film cutter 11 moves downward, it can cut downward at the middle position of any two adjacent second multi-piece units to cut the insulating material strip G. Each second multi-piece unit is stacked below a first multi-piece unit. After the cutting is completed, a multi-piece composite unit I with the structure of second multi-piece unit-insulating film M-first multi-piece unit-insulating film M is obtained. Each multi-piece composite unit I is arranged sequentially at intervals along the first direction a.

[0069] S402. Fabricate a dual-layer composite unit L; Stop the second feeding mechanism and run the first feeding mechanism, the first coating component 4 and the second coating component 5. The first electrode roll A released by the first feeding mechanism passes through the first slitting device 2, the first coating component 4, the second coating component 5, the composite component 6 and the insulating film cutter 11 in sequence, and a dual-layer composite unit L with an insulating film M covering the upper and lower surfaces can be obtained.

[0070] S403. Transfer the multiple composite units I to the stacking device and stack them layer by layer. When the number of stacked units reaches the set value, place the last layer of double composite units L to obtain the stacked multi-pole group K. S404. Transfer the multi-plate electrode group K to the hot pressing device for hardening.

[0071] S500: Fabricating a single-pole group; dividing the multi-pole group K into single-pole groups spaced apart along the second direction b. Specifically, S500 includes: S501. Multiple electrode groups K are cut using an electrode group cutting device 19, wherein the length of the cutting edge of the electrode group cutting device 19 extends along the first direction a.

[0072] Specifically, the hardened multi-electrode assembly K is transported to the electrode cutting device 19, which reciprocates along a third direction c, and the blade length of the electrode cutting device 19 extends along a first direction a, thereby dividing the multi-electrode assembly K into finished single-electrode assemblies N distributed along a second direction b. Each finished single-electrode assembly N has a positive electrode plate-insulating film M-negative electrode plate-insulating film M... structure.

[0073] As can be seen, the electrode assembly manufacturing method provided in this application can not only produce the target product, the finished single electrode assembly N, but also produce a variety of intermediate products such as the first electrode E, the second electrode F, the first multi-electrode unit, the second multi-electrode unit, the multi-electrode composite unit, the double-electrode composite unit L, and the multi-electrode assembly K. The manufacturing process has strong continuity and high utilization rate, which significantly improves production efficiency.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A multi-layer composite unit wafer fabrication device, characterized in that, include: Composite components; A first feeding mechanism is provided at an interval from the composite component, and the first feeding mechanism is used to supply a first multi-piece unit to the composite component; A coating assembly is disposed between the first feeding mechanism and the composite assembly, and the coating assembly is used to attach insulating tape to the first multi-piece unit before the first multi-piece unit enters the composite assembly; The second feeding mechanism is arranged at an interval from the composite component, and the second feeding mechanism is used to supply the composite component with a second multi-piece unit. An insulating film cutter is provided at an interval from the composite component.

2. The multi-wafer composite unit wafer fabrication apparatus according to claim 1, characterized in that, The first feeding mechanism includes: First pole coil blanking component; A first slitting device is provided at an interval from a first electrode roll unloading component. The first electrode roll unloading component is used to feed a first electrode roll to the first slitting device. The first slitting device cuts the first electrode roll along its length direction. A first cutting device is provided at intervals from the first slitting device along the conveying direction of the first electrode roll; the first cutting device cuts the first electrode roll along the width direction of the first electrode roll.

3. The multi-wafer composite unit wafer fabrication apparatus according to claim 2, characterized in that, The second feeding mechanism includes: Second pole coil blanking component; A second slitting device is provided at an interval from the second pole roll unloading component. The second pole roll unloading component is used to feed the second pole roll to the second slitting device. The second slitting device cuts the second pole roll along its length direction. The second cutting device is arranged at intervals from the second slitting device along the conveying direction of the second pole roll; the second cutting device cuts the second pole roll along the width direction of the second pole roll.

4. The multi-wafer composite unit wafer fabrication apparatus according to claim 3, characterized in that, The multi-layer composite unit wafer fabrication device also includes: An electrostatic platform is provided at the entrance of the composite component; A first conveying device is disposed between the first cutting device and the electrostatic platform; The second transport device is disposed between the second cutting device and the electrostatic platform.

5. The multi-wafer composite unit wafer fabrication apparatus according to claim 2, characterized in that, The coating assembly includes: A first coating component, comprising an insulating tape, is spaced apart from the first electrode roll unloading component. The first coating component is used to lay the insulating tape on one side surface of the first electrode roll that has passed through the first cutting device. The second coating component includes another insulating tape. The second coating component is spaced apart from the first electrode roll unloading component. The second coating component is used to lay the insulating tape on the other side surface of the first electrode roll that has passed through the first cutting device.

6. A stacking system, characterized in that, The multi-layer composite unit fabrication apparatus according to any one of claims 1 to 5, wherein the stacking system further comprises: A stacking device, wherein the stacking device is spaced apart from the insulating film cutter; A hot pressing device, wherein the hot pressing device is disposed at an interval from the stacking device; The electrode component cutting device is arranged at an interval from the hot pressing device.

7. A method for manufacturing an electrode assembly, characterized in that, Includes the following steps: S100: Fabricate the first multi-cell unit and transport the first multi-cell unit to the composite assembly along the first direction; S200, The first multi-piece unit includes a first surface and a second surface distributed along a third direction, and insulating tape is attached to the first surface and the second surface respectively; S300: Fabricate a second multi-piece unit, and convey the second multi-piece unit to the composite assembly along the first direction. The first multi-piece unit and the second multi-piece unit are combined in the composite assembly to form a multi-piece composite strip. S400: Cut the multi-piece composite strip into multi-piece composite units that are spaced apart along the first direction. The multiple multi-piece composite units are stacked one by one along the third direction; Fabricate a dual-layer composite unit L, and finally stack a layer of dual-layer composite units on the stacked multi-layer composite units to form a multi-layer pole group. S500, the multi-electrode group is divided into single-electrode groups that are spaced apart along the second direction.

8. The method for manufacturing an electrode assembly according to claim 7, characterized in that, Step S100 includes: S101. Release the first electrode roll along the first direction, divide the first electrode roll into first electrode roll strips spaced apart along the second direction, and cut the first electrode roll strips along the third direction to obtain the first multi-piece unit, the first multi-piece unit including the first electrode sheet.

9. The method for manufacturing an electrode assembly according to claim 8, characterized in that, Step S300 includes: S301. Release the second electrode roll along the first direction, divide the second electrode roll into second electrode roll strips spaced apart along the second direction, and cut the second electrode roll strips along the third direction to obtain the second multi-piece unit, the second multi-piece unit including a second electrode with the opposite polarity to the first electrode; S302. The second multi-piece unit and the first multi-piece unit are stacked in the composite component and thermally bonded to obtain the multi-piece composite strip.

10. The method for manufacturing an electrode assembly according to claim 7, characterized in that, Step S400 includes: cutting the multiple composite strips using an insulating film cutter, wherein the length of the insulating film cutter extends along the second direction; Step S500 includes: cutting the multiple electrode groups using an electrode group cutting device, wherein the length of the electrode group cutting device extends along the first direction; The first direction, the second direction, and the third direction are perpendicular to each other.

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