Z-type cycle film pressing and film drawing laminating machine and laminating process thereof

Abstract

This invention discloses a Z-type circulating pressing and film stretching stacking machine and its stacking process, including a machine base, a feeding device, a transfer platform, and a stacking device; the feeding device includes two sets; the stacking device is set between the two feeding devices, and the stacking device includes a transfer mechanism, a film output mechanism, and a stacking platform; the stacking platform is set below the film output mechanism; the transfer platform is set between the feeding device and the stacking device; the transfer mechanism spans between the transfer platform and the stacking platform; this invention can use the two platforms to move left and right along the straight direction of the film output roller of the film output mechanism to achieve alternating stacking, realizing stacking without stopping the machine, and using the diaphragm Z-type winding roller method to achieve single cell single film cutting, which greatly reduces the time spent cutting the diaphragm when stacking single cells, effectively improving the stacking efficiency, and combined with the diaphragm pressing requirement when the two platforms are alternating, the film stretching requirement is completed by the double-sided independent pressing method, and the diaphragm is automatically flattened before stacking by changing the direction and quantity of the pressing side.

Description

Technical Field

[0001] This invention relates to the field of automated equipment, and in particular to a Z-type circulating film pressing and stretching stacking machine and its stacking process. Background Technology

[0002] In the production process of lithium-ion power batteries, positive and negative electrode sheets are stacked together to form an electrode assembly. During the stacking process, a separator needs to be inserted between adjacent positive or negative electrode sheets to block the flow. After being separated by the separator, the positive and negative electrode sheets are stacked together in a cross pattern to form the battery cell. The key processes in the electrode stacking section are the cross-stacking of the positive and negative electrode sheets and the insertion of the separator between the stacked positive and negative electrode sheets to isolate them.

[0003] The following defects exist in the electrode lamination process: 1. The traditional single-plate, single-station lamination method involves staggered lamination of positive and negative electrodes on a single platform. During the lamination process, the separator is cut and then covered on the surface of each electrode layer. This lamination method has low lamination efficiency and cannot meet the lamination requirements of high-speed automated production lines. 2. The traditional lamination process requires multiple separator cuts depending on the number of electrode layers in the cell. Since each separator cut takes time, this multiple separator cutting process affects the overall lamination efficiency. If the separator only needs to be cut once per cell during the lamination process, the lamination efficiency will be greatly improved. 3. In the research of single-cell, single-separator cutting process, it is necessary to use the left and right translation of the platform to make the separator tensioned around the central roller structure. At the same time, the separator pressing mechanism on the platform presses different sides of the separator according to the different left and right sliding directions. When the separator is pulled from the roller to the left and right sides, there is an angle of inclination with the platform surface, making it impossible to place the electrode. Therefore, the problem of flattening the separator needs to be solved before the electrode is placed on the separator. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a stacking machine and stacking process that uses a dual-platform system to move the film exit roller of the film exit mechanism left and right in a straight line to achieve alternating stacking, thus achieving stacking without stopping the machine. The Z-shaped diaphragm winding roller method is used to achieve single-cell single-cut film, which greatly reduces the time spent cutting the diaphragm when stacking single cells and effectively improves the stacking efficiency. In addition, in combination with the diaphragm pressing requirement during dual-platform alternation, the film pulling requirement is completed by the dual-side independent pressing method. The automatic flattening of the diaphragm before stacking is achieved by changing the direction and number of pressing sides.

[0005] The technical solution adopted by this invention is as follows: A Z-type circulating film pressing and film stretching stacking machine includes a machine base, a feeding device, a transfer platform, and a stacking device; wherein, the feeding device includes two sets, which are spaced apart on both sides of the machine base to introduce positive electrode sheets and negative electrode sheets from both sides of the machine base; the stacking device is located between the two feeding devices, and the stacking device includes a transfer mechanism, a film dispensing mechanism, and a stacking platform; wherein, the lower end of the film dispensing mechanism is provided with a film dispensing roller, which releases a strip-shaped separator film; the stacking platform is located below the film dispensing mechanism, and is provided sequentially along a straight direction with a first waiting station, a first stacking station, a second stacking station, and a second waiting station, with the film dispensing roller between the first stacking station and the second stacking station; the stacking platform includes two sets of moving carriers, one of which moves at the first waiting station, the first stacking station, and the second stacking station, and reciprocates between the first stacking station and the second stacking station. The system employs a single mobile carrier to automatically stack Z-shaped wafers and insert and cover the diaphragm. Another mobile carrier moves between the first and second stacking stations and a second waiting station, repeatedly moving between them to achieve the same result. After stacking, one carrier moves to the first waiting station, while the other moves to the first stacking station to clamp and catch the diaphragm, which is then cut. The carrier at the first waiting station unloads the diaphragm, and the other carrier catches it and performs Z-shaped automatic stacking between the first and second stacking stations. The two carriers continuously stack wafers in a loop. The aforementioned transfer platform is positioned between the loading device and the stacking device. The aforementioned transfer mechanism spans between the transfer platform and the stacking platform. The loading device transfers the positive or negative electrode wafer to the transfer platform, and the transfer mechanism picks up the positive or negative electrode wafer from the transfer platform and transfers it to the mobile carrier.

[0006] Preferably, the feeding device includes a feeding conveyor belt and a feeding robot; wherein, the feeding conveyor belt includes two belts, which are respectively arranged at intervals on both sides of the machine; the feeding robot is arranged between the feeding conveyor belt and the transfer platform; the feeding robot picks up materials from the feeding conveyor belt and moves the materials to the transfer platform.

[0007] Preferably, the stacking platform includes a support platform, a linear module, a moving carrier, a pressing mechanism, and an electrode holder; wherein, the linear module is disposed in the middle of the support platform; the moving carrier is slidably connected to the linear module along a direction perpendicular to the linear module and moves linearly driven by the linear module; the electrode holder is slidably disposed on the moving carrier in a vertical direction via a support column and a spring, and electrode sheets are stacked and covered with a diaphragm on the electrode holder; the pressing mechanism includes two sets, which are respectively disposed at both ends of the electrode holder, and the pressing mechanism at one end of the electrode holder includes two pressing components, which are spaced apart on both sides of the electrode holder, and the two pressing components independently press or release the diaphragm; the moving carrier moves from the first... When a wafer is moved from the first stacking station to the second stacking station, the pressing assembly near the second waiting station presses down the diaphragm, while the other pressing assembly releases the diaphragm. Upon moving to the second stacking station, the two pressing assemblies flatten the diaphragm to facilitate stacking. After one electrode is stacked, the pressing assembly near the first waiting station presses down the diaphragm, while the other pressing assembly releases the diaphragm. After moving from the second stacking station to the first stacking station, the two pressing assemblies flatten the diaphragm again to facilitate stacking, and this cycle continues until the Z-shaped pressing, pulling, and stacking process is completed. After the Z-shaped stacking is completed, the diaphragm covers the electrode surface, the two pressing assemblies press down the diaphragm, and the moving carrier moves from the first stacking station to the second waiting station or from the second stacking station to the first waiting station.

[0008] Preferably, the membrane pressing assembly includes a passive cam, a membrane pressing lifting component, a membrane pressing translation component, and a membrane pressing plate. The passive cam corresponds to the active cam and includes two parallel, spaced-apart passive cam plates, each corresponding to an active cam plate. The active cam plate rotates, causing the passive cam plate to rotate. The membrane pressing translation component is located on the side of one passive cam plate, and its rotation causes it to move horizontally. The membrane pressing lifting component is located on the side of the other passive cam plate and is slidably connected to the membrane pressing translation component in a horizontal straight direction. Its rotation causes the lifting component to move up and down. The membrane pressing plate is connected to the membrane pressing translation component and extends horizontally.

[0009] Preferably, the diaphragm pressing and lifting component includes a diaphragm pressing support, a lifting lever, a lifting wheel, a diaphragm pressing seat, a lifting lever seat, and a sliding groove. The diaphragm pressing support is vertically positioned. The lifting lever is rotatably mounted on the side wall of the diaphragm pressing support and located on the side of the passive cam. A roller is provided at one end of the lifting lever near the passive cam, and a sliding groove is provided at the other end. When the passive cam rotates, the roller drives the lifting lever to rotate. The diaphragm pressing seat is slidably mounted vertically on the side wall of the diaphragm pressing support. A lifting wheel is rotatably connected to the bottom of the diaphragm pressing seat, and the lifting wheel is positioned corresponding to the sliding groove. The lifting lever is horizontally connected to the side wall of the diaphragm pressing seat, and a horizontally formed sliding groove is provided on the lifting lever seat. When the lifting lever rotates, it drives the diaphragm pressing seat and the lifting lever seat to move up and down via the lifting wheel.

[0010] Preferably, the diaphragm translation component includes a translation lever, a translation roller, a diaphragm translation seat, a diaphragm roller, and a diaphragm seat. The translation lever is rotatably mounted on the side wall of the diaphragm support and located on the side of the passive cam. A roller is located at one end of the translation lever near the passive cam, and a groove is located at the other end of the translation lever. When the passive cam rotates, the roller drives the translation lever to rotate. The diaphragm translation seat is slidably connected to the side wall of the diaphragm support in the horizontal direction, and the bottom of the diaphragm translation seat has a... Translation rollers; the aforementioned pressure film base is slidably connected to the end wall of the pressure film translation base in the vertical direction and moves linearly with the pressure film translation base; the pressure film base extends horizontally above the pressure film support, and the diaphragm pressure plate is horizontally connected to the pressure film base; the aforementioned pressure film rollers are connected to the lower end of the pressure film base and extend into the actuating groove, sliding freely within the actuating groove. When the pressure film base is translated, the pressure film rollers slide linearly within the actuating groove to avoid motion interference. When the lifting actuating base moves up and down, the pressure film base is driven to move up and down through the pressure film rollers.

[0011] Preferably, it further includes a feeding device, which includes a feeding robot and a feeding platform; wherein the feeding robot is mounted above the stacking platform, and the feeding platform is located on the side of the stacking platform; the feeding robot includes a horizontal moving mechanism, a lifting moving mechanism, and a clamping mechanism; at least two strip grooves a are spaced apart on the side of the feeding platform; the clamping mechanism picks up the material from the stacking platform, drives it to the feeding platform via the horizontal moving mechanism and the lifting moving mechanism, and while the clamping mechanism is embedded in the strip grooves a, it places the stacked electrode diaphragm assembly on the feeding platform.

[0012] Preferably, the horizontal moving mechanism includes a linear module, a support plate, a horizontal drive motor, a horizontal lead screw, and a horizontal slide block; wherein, the linear module is mounted above the stacking platform along a direction perpendicular to the stacking platform; the support plate is slidably connected to the linear module and connected to the output end of the linear module; the horizontal drive motor is horizontally mounted on the side of the support plate; the horizontal lead screw is rotatably inserted into the lower part of the support plate and connected to the output end of the horizontal drive motor via a transmission belt, and is driven to rotate by the horizontal drive motor; the horizontal slide block is slidably connected to the bottom of the support plate and connected to the horizontal lead screw via a lead screw seat; the rotational movement of the horizontal lead screw drives the horizontal slide block to move along the direction of the horizontal lead screw.

[0013] Preferably, the lifting and moving mechanism includes a lifting drive motor, a vertical lead screw, and a lifting seat; wherein, the lifting drive motor is vertically mounted on the side wall of the horizontal slide; the output end of the lifting drive motor is arranged in the vertical direction; the vertical lead screw is rotatably inserted vertically into the horizontal slide and connected to the output end of the lifting drive motor via a transmission belt, and is driven to rotate by the lifting drive motor; the lifting seat is slidably connected to the horizontal slide and connected to the vertical lead screw via a lead screw seat; the rotation of the vertical lead screw drives the lifting seat to move along the direction of the vertical lead screw.

[0014] Preferably, the clamping mechanism includes a rotary motor, a gripper control cylinder, an upper gripper, and a lower gripper; wherein, the rotary motor is mounted on a lifting base; the gripper control cylinder is connected to the output end of the rotary motor and is driven to rotate by the rotary motor; the gripper control cylinder is respectively provided with an upper output end pointing vertically upward and a lower output end pointing vertically downward; the upper gripper and the lower gripper are respectively mounted on the upper output end and the lower output end of the gripper control cylinder, and are driven by the gripper control cylinder to move closer to each other or further apart, so as to clamp or release the stacked electrode and diaphragm assembly.

[0015] Preferably, the feeding platform includes a feeding linear module, a feeding slide, a feeding pressing cylinder, and a feeding pressure plate; wherein, the feeding linear module is horizontally arranged; the feeding slide is arranged on the output end of the feeding linear module and is driven to move linearly by the feeding linear module; at least two spaced strip grooves a are opened on the side of the feeding slide; the feeding pressing cylinder is arranged on the side of the feeding slide; the output direction of the feeding pressing cylinder is vertically arranged; the feeding pressure plate is arranged on the output end of the feeding pressing cylinder and is driven to move up and down by the feeding pressing cylinder; an electrode sheet and a diaphragm assembly are placed on the feeding slide, and the feeding pressing cylinder drives the feeding pressure plate to press the electrode sheet and the diaphragm assembly together.

[0016] A stacking process for a Z-type circulating film pressing and stretching stacking machine includes the following process steps:

[0017] S1. Feeding and Transfer: The feeding conveyor belt of the feeding device feeds the positive and negative electrode sheets in a straight line along both sides of the machine. The feeding robot moves the electrode sheets from the feeding conveyor belt to the transfer platform.

[0018] S2. Take the diaphragm: A set of moving carriers on the stacking platform presses the strip-shaped diaphragm from one side through the film-exiting roller below the film-exiting mechanism and then pulls the diaphragm and moves it in a straight line to the stacking station. The film-pressing mechanism flattens the diaphragm from both sides.

[0019] S3, First stacking: After the diaphragm at the stacking station in step S2 is flattened, the transfer mechanism takes out the electrode from the transfer platform in step S1 and places it on the diaphragm.

[0020] S4. Second stacking: After the first stacking in step S3 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm. One set of pressing mechanisms presses the strip diaphragm from the other side and moves the whole to another stacking station. The diaphragm is folded and covers the electrode in step S3. Then the transfer mechanism takes out another electrode from another transfer platform and places it on the diaphragm to complete the second stacking.

[0021] S5. Circular Z-type stacking: After the second stacking in step S4 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm, and one set of pressing mechanisms presses the diaphragm from one side and moves as a whole to the stacking station, where the first stacking in step S3 is completed; the stacking is repeated from step S3 to step S5 until the Z-type stacking of all electrodes is completed.

[0022] S6. Feeding, diaphragm cutting and diaphragm splicing: After the electrode sheets are stacked in step S5, the moving carrier moves the electrode sheets to the feeding station. At the same time, another stacking platform moves to the stacking station near the feeding station to press the diaphragm. The diaphragm cutting mechanism set on the machine cuts the strip diaphragm for feeding.

[0023] S7. Stacking on another platform: After one stacking platform completes the unloading in step S6, another stacking platform receives the release film from the stacking station and moves back and forth between the two stacking platforms, and stacks the film in the order of steps S3 to S5.

[0024] S8. Material feeding, diaphragm cutting and diaphragm connection on another platform: After the stacking is completed in step S7, the other stacking platform moves to another material feeding station. After the stacking platform that completed the material feeding in step S6 moves to another stacking station and presses the diaphragm, the diaphragm is cut by the diaphragm cutting mechanism for material feeding.

[0025] S9. Alternating Stacking: After pressing the diaphragm at another stacking station in step S8, the stacking platform moves to the stacking station and completes the cyclic Z-shaped stacking between the two stacking stations, and then unloads the material; the two stacking platforms alternate stacking and unloading in this way to achieve stacking without stopping the machine.

[0026] The beneficial effects of this invention are:

[0027] This invention addresses the shortcomings and deficiencies of existing technologies by independently developing and designing a stacking machine and its stacking process that utilizes a dual-platform system with alternating left and right translation of the film exit roller in the film exit mechanism along a straight line. This achieves stacking without stopping the machine and uses a Z-shaped diaphragm winding roller method to achieve single-cell single-cut film, greatly reducing the time spent cutting the diaphragm during single-cell stacking and effectively improving stacking efficiency. Furthermore, in conjunction with the diaphragm pressing requirements during dual-platform alternation, it completes the film pulling requirements through a dual-side independent pressing method. By changing the direction and number of pressing sides, it achieves automatic flattening of the diaphragm before stacking.

[0028] The invention is centered around a stacking platform. Two feeding conveyor belts are arranged on both sides of the platform to transport positive and negative electrode sheets respectively. Between the feeding conveyor belts and the stacking platform, there are feeding robots, transfer platforms, and transfer arms. The feeding robots move the electrode sheets transported on the feeding conveyor belts to the transfer platform. Then, the transfer arms move the electrode sheets from the transfer platform to the stacking platform to complete the stacking and form a battery cell. The battery cell is then automatically unloaded by the unloading robots onto the unloading platform.

[0029] This invention represents a breakthrough improvement over traditional lamination processes. The lamination platform uses a linear module as the driving component. The linear module has, in sequence, a first unloading station, a first lamination station, a second lamination station, and another unloading station. A film-ejecting roller for the film-ejecting mechanism is located on the center line of the first and second lamination stations. The film-ejecting roller includes two roller shafts arranged left and right along the center line, with a strip-shaped diaphragm extending downwards from the gap between the two roller shafts. Two moving carriers are spaced apart along a straight line on the linear module. These moving carriers drive the electrode holders and the film-pressing mechanisms located at both ends of the electrode holders to move synchronously in a linear fashion. Specifically, the moving carrier on the left moves the electrode holders and film-pressing mechanisms between the first unloading station, the first lamination station, and the second lamination station, while the moving carrier on the right moves the electrode holders and film-pressing mechanisms between the first lamination station, the second lamination station, and the second unloading station. From the overall lamination process perspective, the lamination is completed alternately on the left and right moving carriers. For example, after lamination is completed on the right moving carrier, it moves to the second unloading station. The left moving carrier moves to the right to the second lamination station, and after the membrane pressing assembly on the left side of the membrane pressing mechanism presses the diaphragm, the diaphragm cutting mechanism located on the outside cuts the diaphragm to allow the cells to be unloaded after lamination on the right transfer platform. At the same time, the left moving carrier starts from the second lamination station and moves to the left towards the first lamination station, moving back and forth between the first and second lamination stations to complete a set of electrode laminations to form a cell. The first moving carrier moves to the first unloading station, while the second moving carrier moves to the first stacking station. After the right-side pressing mechanism clamps the right side of the diaphragm, the external diaphragm cutting mechanism cuts the diaphragm, allowing the left moving carrier to unload the battery cells. The right moving carrier then moves from the first stacking station to the second stacking station and moves back and forth between the two stations until the stacking is completed. The two moving carriers alternate in this cycle. After one moving carrier completes the stacking, the other moving carrier takes over and presses the diaphragm in time, achieving stacking without stopping the machine and effectively improving the stacking efficiency.Furthermore, when the single mobile carrier of the present invention performs lamination back and forth between the first lamination station and the second lamination station, the film pressing mechanism located at both ends of the electrode holder includes two sets of parallel film pressing assemblies. The two film pressing assemblies move independently to perform film pressing and releasing actions from the outside and above. After the film pressing assembly presses down on the diaphragm, when the mobile carrier pulls the diaphragm, the film pressing assembly located on the pulling direction side presses down on the diaphragm, and the diaphragm is tensioned by the middle film exit roller. At the same time, the diaphragm covers the top of the electrode during the pulling process. When the membrane is pulled to the first or second stacking station, the membrane pressing assembly on the other side simultaneously presses down on the diaphragm, flattening it to facilitate the placement of the electrode. After the electrode is placed, the membrane pressing assembly switches to pressing down on the diaphragm only on the other side and moves to the other side repeatedly. By pressing down on the membrane with the tensioning of the membrane roller, the diaphragm is stacked in a Z-shape. During the entire cell stacking process, the diaphragm only needs to be cut once at the end of the stacking, effectively reducing the number of times the diaphragm is cut and greatly improving the stacking efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the process steps of the present invention.

[0031] Figure 2 This is one of the three-dimensional structural schematic diagrams of the present invention.

[0032] Figure 3 This is the second three-dimensional structural schematic diagram of the present invention.

[0033] Figure 4 This is one of the three-dimensional structural schematic diagrams of the omitted components of the present invention.

[0034] Figure 5 This is the second three-dimensional structural schematic diagram of the omitted components of the present invention.

[0035] Figure 6 This is a second three-dimensional structural schematic diagram of the stacking device of the present invention.

[0036] Figure 7 This is a second three-dimensional structural schematic diagram of the stacking device of the present invention.

[0037] Figure 8 This is one of the three-dimensional structural schematic diagrams of the stacking platform of the present invention.

[0038] Figure 9 This is the second three-dimensional structural schematic diagram of the stacking platform of the present invention.

[0039] Figure 10 This is one of the three-dimensional structural schematic diagrams of the stacking platform limiting mechanism of the present invention.

[0040] Figure 11 This is the second three-dimensional structural schematic diagram of the stacking platform limiting mechanism of the present invention.

[0041] Figure 12 This is one of the three-dimensional structural schematic diagrams of the feeding device of the present invention.

[0042] Figure 13 This is a second three-dimensional structural schematic diagram of the feeding device of the present invention.

[0043] Figure 14 This is one of the three-dimensional structural schematic diagrams of the unloading robot of the present invention.

[0044] Figure 15 This is the second three-dimensional structural schematic diagram of the unloading robot of the present invention.

[0045] Figure 16 This is the third three-dimensional structural diagram of the unloading robot of the present invention.

[0046] Figure 17 This is the fourth three-dimensional structural diagram of the unloading robot of the present invention.

[0047] Figure 18 This is one of the three-dimensional structural diagrams of the feeding platform of the present invention.

[0048] Figure 19 This is the second three-dimensional structural schematic diagram of the material feeding platform of the present invention. Detailed Implementation

[0049] The present invention will now be further described with reference to the accompanying drawings:

[0050] like Figures 1 to 19As shown, the technical solution adopted by the present invention is as follows: A Z-type circulating pressing and stretching film stacking machine includes a machine base 1, a feeding device, a transfer platform 4, and a stacking device; wherein, the feeding device includes two sets, which are spaced apart on both sides of the machine base 1 to introduce positive electrode sheets and negative electrode sheets from both sides of the machine base 1; the stacking device is located between the two feeding devices, and the stacking device includes a transfer mechanism 5, a film dispensing mechanism 6, and a stacking platform 7; wherein, the lower end of the film dispensing mechanism 6 is provided with a film dispensing roller, which releases a strip-shaped separator film; the stacking platform 7 is located below the film dispensing mechanism 6, and is provided sequentially along a straight direction with a first waiting station, a first stacking station, a second stacking station, and a second waiting station, with the film dispensing roller between the first stacking station and the second stacking station; the stacking platform 7 includes two sets of moving carriers 73, one of which moves at the first waiting station, the first stacking station, and the second stacking station, and moves back and forth at the first stacking station and the second stacking station. The system achieves Z-shaped automatic lamination and diaphragm insertion and covering. Another mobile carrier 73 moves between the first lamination station, the second lamination station, and the second waiting station, reciprocating between the first and second lamination stations to achieve Z-shaped automatic lamination and diaphragm insertion and covering. After lamination is completed, one mobile carrier 73 moves to the first waiting station, while the other mobile carrier 73 moves to the first lamination station to clamp and catch the diaphragm, which is then cut. The mobile carrier 73 at the first waiting station then unloads the material. Another mobile carrier 73 receives the diaphragm and performs Z-shaped automatic stacking back and forth between the first stacking station and the second stacking station; the two mobile carriers 73 continuously stack the diaphragm in a cycle; the aforementioned transfer platform 4 is set between the feeding device and the stacking device; the aforementioned transfer mechanism 5 is straddling the transfer platform 4 and the stacking platform 7; the feeding device moves the positive electrode sheet or negative electrode sheet to the transfer platform 4, and the transfer mechanism 5 picks up the positive electrode sheet or negative electrode sheet from the transfer platform 4 and then moves it to the mobile carrier 73.

[0051] The feeding device includes a feeding conveyor belt 2 and a feeding robot 3; wherein, the feeding conveyor belt 2 includes two belts, which are respectively arranged at intervals on both sides of the machine platform 1; the feeding robot 3 is arranged between the feeding conveyor belt 2 and the transfer platform 4; the feeding robot 3 picks up materials from the feeding conveyor belt 2 and moves the materials to the transfer platform 4.

[0052] The stacking platform 7 includes a support platform 71, a linear module 72, a moving carrier 73, a film pressing mechanism 74, and an electrode holder 75. The linear module 72 is located in the middle of the support platform 71. The moving carrier 73 is slidably connected to the linear module 72 along a direction perpendicular to the linear module 72 and moves linearly via the linear module 72. The electrode holder 75 is slidably mounted vertically on the moving carrier 73 via a support column and a spring. Electrodes are stacked on the electrode holder 75, and a diaphragm is covered. Two film pressing mechanisms 74 are included, each located at one end of the electrode holder 75. The film pressing mechanism 74 at one end of the electrode holder 75 includes two film pressing assemblies, which are spaced apart on both sides of the electrode holder 75 and are independent. Pressing or releasing the separator membrane; the moving carrier 73 moves from the first stacking station to the second stacking station. The pressing assembly near the second waiting station presses down the separator membrane, and the other pressing assembly releases the separator membrane. When moving to the second stacking station, the two pressing assemblies flatten the separator membrane to facilitate stacking. After one electrode is stacked, the pressing assembly near the first waiting station presses down the separator membrane, and the other pressing assembly releases the separator membrane. After moving from the second stacking station to the first stacking station, the two pressing assemblies flatten the separator membrane again to facilitate stacking, until the Z-type pressing, pulling, and stacking process is completed. After the Z-type stacking is completed, the separator membrane covers the electrode surface. The two pressing assemblies press down the separator membrane, and the moving carrier 73 moves from the first stacking station to the second waiting station or from the second stacking station to the first waiting station.

[0053] The membrane pressing assembly includes a passive cam 741, a membrane pressing lifting component, a membrane pressing translation component, and a membrane pressing plate 7412. The passive cam 741 is configured to correspond to the active cam and includes two parallel, spaced-apart passive cam plates, each corresponding to an active cam plate. Rotation of the active cam plate drives the passive cam plates to rotate. The membrane pressing translation component is located on the side of one passive cam plate, and its rotation causes horizontal movement. The membrane pressing lifting component is located on the side of the other passive cam plate and is slidably connected to the membrane pressing translation component in a horizontal straight direction. Rotation of this passive cam plate causes the membrane pressing lifting component to move up and down. The membrane pressing plate 7412 is connected to the membrane pressing translation component and extends horizontally.

[0054] The diaphragm pressing and lifting component includes a diaphragm pressing support, a lifting lever 742, a lifting wheel 743, a diaphragm pressing lifting seat 744, a lifting seat 745, and a sliding groove 746. The diaphragm pressing support is vertically positioned. The lifting lever 742 is rotatably mounted on the side wall of the diaphragm pressing support and located on the side of the driven cam 741. A roller is provided at one end of the lifting lever 742 near the driven cam 741, and a sliding groove is provided at the other end. When the driven cam 741 rotates, it drives the lifting lever 742 via the roller. Rotation; the above-mentioned pressing lifting seat 744 is slidably mounted on the side wall of the pressing support in the vertical direction, and the bottom of the pressing lifting seat 744 is rotatably connected to the lifting dial 743, which is provided with a corresponding dial groove; the above-mentioned lifting dial seat 745 is horizontally connected to the side wall of the pressing lifting seat 744, and the lifting dial seat 745 is horizontally provided with a strip-shaped dial groove 746; when the above-mentioned lifting lever 742 rotates, it drives the pressing lifting seat 744 and the lifting dial seat 745 to move up and down through the lifting dial 743.

[0055] The diaphragm pressing and translating component includes a translating lever 749, a translating roller 7410, a diaphragm pressing and translating seat 7411, a diaphragm pressing roller 747, and a diaphragm pressing seat 748. The translating lever 749 is rotatably mounted on the side wall of the diaphragm pressing seat and located on the side of the driven cam 741. One end of the translating lever 749 near the driven cam 741 has a roller, and the other end has a groove. When the driven cam 741 rotates, it drives the translating lever 749 to rotate via the roller. The diaphragm pressing and translating seat 7411 is slidably connected to the side wall of the diaphragm pressing seat in the horizontal direction. The bottom of the diaphragm pressing and translating seat 7411 has a translating roller 7410. The aforementioned pressure film holder 748 is slidably connected to the end wall of the pressure film translation seat 7411 in the vertical direction and moves linearly with the pressure film translation seat 7411; the pressure film holder 748 extends horizontally above the pressure film support, and the diaphragm pressure plate 7412 is horizontally connected to the pressure film holder 748; the aforementioned pressure film roller 747 is connected to the lower end of the pressure film holder 748 and extends into the actuating groove 746, sliding freely within the actuating groove 746. When the pressure film holder 748 moves horizontally, the pressure film roller 747 slides linearly within the actuating groove 746 to avoid motion interference. When the lifting actuating seat 745 moves up and down, the pressure film holder 748 is driven to move up and down through the pressure film roller 747.

[0056] It also includes a feeding device, which includes a feeding robot 8 and a feeding platform 9; wherein, the feeding robot 8 is mounted above the stacking platform 7, and the feeding platform 9 is located on the side of the stacking platform 7; the feeding robot 8 includes a horizontal moving mechanism, a lifting moving mechanism and a clamping mechanism; the side of the feeding platform 9 is provided with at least two strip grooves a; the clamping mechanism picks up the material from the stacking platform 7 and moves it to the feeding platform 9 by being driven by the horizontal moving mechanism and the lifting moving mechanism, and while the clamping mechanism is embedded in the strip grooves a, it places the stacked electrode diaphragm assembly on the feeding platform 9.

[0057] The horizontal moving mechanism includes a linear module, a support plate 81, a horizontal drive motor 82, a horizontal lead screw 83, and a horizontal slide 84. The linear module is mounted above the stacking platform 7 in a direction perpendicular to the stacking platform 7. The support plate 81 is slidably connected to the linear module and connected to its output end. The horizontal drive motor 82 is horizontally positioned on the side of the support plate 81. The horizontal lead screw 83 is rotatably inserted into the lower part of the support plate 81 and connected to the output end of the horizontal drive motor 82 via a transmission belt, and is driven to rotate by the horizontal drive motor 82. The horizontal slide 84 is slidably connected to the bottom of the support plate 81 and connected to the horizontal lead screw 83 via a lead screw seat. The rotational movement of the horizontal lead screw 83 drives the horizontal slide 84 to move along the direction of the horizontal lead screw 83.

[0058] The lifting and moving mechanism includes a lifting drive motor 85, a vertical lead screw 86, and a lifting seat 87. The lifting drive motor 85 is vertically mounted on the side wall of the horizontal slide 84. The output end of the lifting drive motor 85 is arranged vertically. The vertical lead screw 86 is rotatably inserted vertically into the horizontal slide 84 and connected to the output end of the lifting drive motor 85 via a transmission belt, and is driven to rotate by the lifting drive motor 85. The lifting seat 87 is slidably connected to the horizontal slide 84 and connected to the vertical lead screw 86 via a lead screw seat. The rotation of the vertical lead screw 86 causes the lifting seat 87 to move along the direction of the vertical lead screw 86.

[0059] The clamping mechanism includes a rotary motor 88, a gripper control cylinder 89, an upper gripper 810, and a lower gripper 811. The rotary motor 88 is mounted on a lifting seat 87. The gripper control cylinder 89 is connected to the output end of the rotary motor 88 and is driven to rotate by the rotary motor 88. The gripper control cylinder 89 is provided with an upper output end that is vertically upward and a lower output end that is vertically downward. The upper gripper 810 and the lower gripper 811 are respectively mounted on the upper output end and the lower output end of the gripper control cylinder 89, and are driven by the gripper control cylinder 89 to move closer to each other or further apart, so as to clamp or release the stacked electrode and diaphragm assembly.

[0060] The unloading platform 9 includes an unloading linear module 91, an unloading slide 92, an unloading pressing cylinder 93, and an unloading pressing plate 94. The unloading linear module 91 is horizontally positioned. The unloading slide 92 is positioned on the output end of the unloading linear module 91 and is driven to move linearly by the unloading linear module 91. At least two spaced strip grooves a are provided on the side of the unloading slide 92. The unloading pressing cylinder 93 is positioned on the side of the unloading slide 92 and its output direction is vertical. The unloading pressing plate 94 is positioned on the output end of the unloading pressing cylinder 93 and is driven to move vertically by the unloading pressing cylinder 93. An electrode and diaphragm assembly is placed on the unloading slide 92, and the unloading pressing cylinder 93 drives the unloading pressing plate 94 to press the electrode and diaphragm assembly together.

[0061] A stacking process for a Z-type circulating film pressing and stretching stacking machine includes the following process steps:

[0062] S1. Feeding and Transfer: The feeding conveyor belt of the feeding device feeds the positive and negative electrode sheets in a straight line along both sides of the machine. The feeding robot moves the electrode sheets from the feeding conveyor belt to the transfer platform.

[0063] S2. Take the diaphragm: A set of moving carriers on the stacking platform presses the strip-shaped diaphragm from one side through the film-exiting roller below the film-exiting mechanism and then pulls the diaphragm and moves it in a straight line to the stacking station. The film-pressing mechanism flattens the diaphragm from both sides.

[0064] S3, First stacking: After the diaphragm at the stacking station in step S2 is flattened, the transfer mechanism takes out the electrode from the transfer platform in step S1 and places it on the diaphragm.

[0065] S4. Second stacking: After the first stacking in step S3 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm. One set of pressing mechanisms presses the strip diaphragm from the other side and moves the whole to another stacking station. The diaphragm is folded and covers the electrode in step S3. Then the transfer mechanism takes out another electrode from another transfer platform and places it on the diaphragm to complete the second stacking.

[0066] S5. Circular Z-type stacking: After the second stacking in step S4 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm, and one set of pressing mechanisms presses the diaphragm from one side and moves as a whole to the stacking station, where the first stacking in step S3 is completed; the stacking is repeated from step S3 to step S5 until the Z-type stacking of all electrodes is completed.

[0067] S6. Feeding, diaphragm cutting and diaphragm splicing: After the electrode sheets are stacked in step S5, the moving carrier moves the electrode sheets to the feeding station. At the same time, another stacking platform moves to the stacking station near the feeding station to press the diaphragm. The diaphragm cutting mechanism set on the machine cuts the strip diaphragm for feeding.

[0068] S7. Stacking on another platform: After one stacking platform completes the unloading in step S6, another stacking platform receives the release film from the stacking station and moves back and forth between the two stacking platforms, and stacks the film in the order of steps S3 to S5.

[0069] S8. Material feeding, diaphragm cutting and diaphragm connection on another platform: After the stacking is completed in step S7, the other stacking platform moves to another material feeding station. After the stacking platform that completed the material feeding in step S6 moves to another stacking station and presses the diaphragm, the diaphragm is cut by the diaphragm cutting mechanism for material feeding.

[0070] S9. Alternating Stacking: After pressing the diaphragm at another stacking station in step S8, the stacking platform moves to the stacking station and completes the cyclic Z-shaped stacking between the two stacking stations, and then unloads the material; the two stacking platforms alternate stacking and unloading in this way to achieve stacking without stopping the machine.

[0071] Furthermore, this invention designs a stacking machine and its stacking process that uses a dual-platform system to achieve alternating stacking by moving the film exit roller of the film exiting mechanism left and right along a straight line, thereby realizing stacking without stopping the machine. It adopts a Z-shaped diaphragm winding roller method to achieve single-cell single-cut film, which greatly reduces the time spent cutting the diaphragm when stacking single cells and effectively improves the stacking efficiency. In addition, in combination with the diaphragm pressing requirement during dual-platform alternation, the film pulling requirement is completed by a dual-side independent pressing method. The automatic flattening of the diaphragm before stacking is achieved by changing the direction and number of pressing sides.

[0072] The invention is centered around a stacking platform. Two feeding conveyor belts are arranged on both sides of the platform to transport positive and negative electrode sheets respectively. Between the feeding conveyor belts and the stacking platform, there are feeding robots, transfer platforms, and transfer arms. The feeding robots move the electrode sheets transported on the feeding conveyor belts to the transfer platform. Then, the transfer arms move the electrode sheets from the transfer platform to the stacking platform to complete the stacking and form a battery cell. The battery cell is then automatically unloaded by the unloading robots onto the unloading platform.

[0073] This invention represents a breakthrough improvement over traditional lamination processes. The lamination platform uses a linear module as the driving component. The linear module has, in sequence, a first unloading station, a first lamination station, a second lamination station, and another unloading station. A film-ejecting roller for the film-ejecting mechanism is located on the center line of the first and second lamination stations. The film-ejecting roller includes two roller shafts arranged left and right along the center line, with a strip-shaped diaphragm extending downwards from the gap between the two roller shafts. Two moving carriers are spaced apart along a straight line on the linear module. These moving carriers drive the electrode holders and the film-pressing mechanisms located at both ends of the electrode holders to move synchronously in a linear fashion. Specifically, the moving carrier on the left moves the electrode holders and film-pressing mechanisms between the first unloading station, the first lamination station, and the second lamination station, while the moving carrier on the right moves the electrode holders and film-pressing mechanisms between the first lamination station, the second lamination station, and the second unloading station. From the overall lamination process perspective, the lamination is completed alternately on the left and right moving carriers. For example, after lamination is completed on the right moving carrier, it moves to the second unloading station. The left moving carrier moves to the right to the second lamination station, and after the membrane pressing assembly on the left side of the membrane pressing mechanism presses the diaphragm, the diaphragm cutting mechanism located on the outside cuts the diaphragm to allow the cells to be unloaded after lamination on the right transfer platform. At the same time, the left moving carrier starts from the second lamination station and moves to the left towards the first lamination station, moving back and forth between the first and second lamination stations to complete a set of electrode laminations to form a cell. The first moving carrier moves to the first unloading station, while the second moving carrier moves to the first stacking station. After the right-side pressing mechanism clamps the right side of the diaphragm, the external diaphragm cutting mechanism cuts the diaphragm, allowing the left moving carrier to unload the battery cells. The right moving carrier then moves from the first stacking station to the second stacking station and moves back and forth between the two stations until the stacking is completed. The two moving carriers alternate in this cycle. After one moving carrier completes the stacking, the other moving carrier takes over and presses the diaphragm in time, achieving stacking without stopping the machine and effectively improving the stacking efficiency.Furthermore, when the single mobile carrier of the present invention performs lamination back and forth between the first lamination station and the second lamination station, the film pressing mechanism located at both ends of the electrode holder includes two sets of parallel film pressing assemblies. The two film pressing assemblies move independently to perform film pressing and releasing actions from the outside and above. After the film pressing assembly presses down on the diaphragm, when the mobile carrier pulls the diaphragm, the film pressing assembly located on the pulling direction side presses down on the diaphragm, and the diaphragm is tensioned by the middle film exit roller. At the same time, the diaphragm covers the top of the electrode during the pulling process. When the membrane is pulled to the first or second stacking station, the membrane pressing assembly on the other side simultaneously presses down on the diaphragm, flattening it to facilitate the placement of the electrode. After the electrode is placed, the membrane pressing assembly switches to pressing down on the diaphragm only on the other side and moves to the other side repeatedly. By pressing down on the membrane with the tensioning of the membrane roller, the diaphragm is stacked in a Z-shape. During the entire cell stacking process, the diaphragm only needs to be cut once at the end of the stacking, effectively reducing the number of times the diaphragm is cut and greatly improving the stacking efficiency.

[0074] The embodiments of this invention are merely illustrative of specific implementation methods and are not intended to limit the scope of protection. Those skilled in the art can make modifications based on these embodiments; therefore, all equivalent changes or modifications made in accordance with the scope of this invention's patent claims fall within the scope of this invention's patent claims.

Claims

1. A Z-type circulating film pressing and film stretching stacking machine, characterized in that: The system includes a machine base (1), a feeding device, a transfer platform (4), and a stacking device. The feeding device comprises two sets, spaced apart on both sides of the machine base (1) to allow positive and negative electrode sheets to be fed in from both sides of the machine base (1). The stacking device is positioned between the two feeding devices and includes a transfer mechanism (5), a film exit mechanism (6), and a stacking platform (7). The film exit mechanism (6) has a film exit roller at its lower end, which releases a strip of separator film. The stacking platform (7)... The film delivery mechanism (6) is located below the film delivery mechanism (6) and is arranged in a straight line with a first waiting station, a first stacking station, a second stacking station and a second waiting station. The film delivery roller is located between the first stacking station and the second stacking station. The stacking platform (7) includes two sets of moving carriers (73). One of the moving carriers (73) moves at the first waiting station, the first stacking station and the second stacking station. It moves back and forth at the first stacking station and the second stacking station to realize Z-shaped automatic stacking and diaphragm insertion and covering. Another mobile carrier (73) moves between the first stacking station, the second stacking station, and the second waiting station, moving back and forth between the first and second stacking stations to achieve Z-shaped automatic stacking and diaphragm insertion and covering; after one mobile carrier (73) completes stacking, it moves to the first waiting station, and the other mobile carrier (73) moves to the first stacking station to clamp and catch the diaphragm, after which the diaphragm is cut, the mobile carrier (73) at the first waiting station unloads the material, and the other mobile carrier (73) catches the diaphragm. The membrane is automatically stacked in a Z-shape between the first and second stacking stations; the two moving carriers (73) continuously stack the membrane in a cycle; the aforementioned transfer platform (4) is set between the feeding device and the stacking device; the aforementioned transfer mechanism (5) is straddling the transfer platform (4) and the stacking platform (7); the feeding device moves the positive or negative electrode sheet to the transfer platform (4), and the transfer mechanism (5) takes the positive or negative electrode sheet from the transfer platform (4) and moves it to the moving carrier (73); The stacking platform (7) includes a support platform (71), a linear module (72), a moving carrier (73), a pressing mechanism (74), and an electrode holder (75). The linear module (72) is located in the middle of the support platform (71). The moving carrier (73) is slidably connected to the linear module (72) in a direction perpendicular to the linear module (72) and moves linearly via the linear module (72). The electrode holder (75) is slidably mounted on the moving carrier (73) in a vertical direction via a support column and a spring. Electrodes are stacked on the electrode holder (75), and a diaphragm is covered. The pressing mechanism (74) includes two sets, each set located at one end of the electrode holder (75). The pressing mechanism (74) at one end of the electrode holder (75) includes two pressing components, connected between the two pressing components. The separator is set on both sides of the electrode holder (75), and the two pressing film assemblies independently press or release the separator. The moving carrier (73) moves from the first stacking station to the second stacking station. The pressing film assembly on the side closer to the second waiting station presses the separator, and the other pressing film assembly releases the separator. When it moves to the second stacking station, the two pressing film assemblies flatten the separator so that it can be stacked. After one electrode is stacked, the pressing film assembly on the side closer to the first waiting station presses the separator, and the other pressing film assembly releases the separator. After it moves from the second stacking station to the first stacking station, the two pressing film assemblies flatten the separator again so that it can be stacked. This process continues until the Z-type pressing and pulling film stacking is completed. After the Z-type stacking is completed, the separator covers the surface of the electrode. The two pressing film assemblies press the separator, and the moving carrier (73) moves from the first stacking station to the second waiting station or from the second stacking station to the first waiting station.

2. The Z-type circulating film pressing and film stretching stacking machine according to claim 1, characterized in that: The feeding device includes a feeding conveyor belt (2) and a feeding robot (3); wherein, the feeding conveyor belt (2) includes two belts, which are respectively arranged at intervals on both sides of the machine (1); the feeding robot (3) is arranged between the feeding conveyor belt (2) and the transfer platform (4); the feeding robot (3) picks up materials from the feeding conveyor belt (2) and moves the materials to the transfer platform (4).

3. The Z-type circulating film pressing and film stretching stacking machine according to claim 1, characterized in that: The membrane pressing assembly includes a passive cam (741), a membrane pressing lifting component, a membrane pressing translation component, and a membrane pressing plate (7412). The passive cam (741) is configured to correspond to the active cam. The passive cam (741) includes two passive cam plates arranged side by side and spaced apart. The passive cam plates are respectively configured to correspond to the active cam plates. When the active cam plates rotate, they drive the passive cam plates to rotate. The membrane pressing translation component is disposed on the side of one passive cam plate. When the passive cam plate rotates, it drives the membrane pressing translation component to move horizontally. The membrane pressing lifting component is disposed on the side of the other passive cam plate and is slidably connected to the membrane pressing translation component in the horizontal straight direction. When the passive cam plate rotates, it drives the membrane pressing lifting component to move up and down. The membrane pressing plate (7412) is connected to the membrane pressing translation component and extends horizontally.

4. The Z-type circulating film pressing and film stretching stacking machine according to claim 3, characterized in that: The diaphragm pressing and lifting component includes a diaphragm pressing support, a lifting lever (742), a lifting wheel (743), a diaphragm pressing seat (744), a lifting seat (745), and a sliding groove (746). The diaphragm pressing support is vertically positioned. The lifting lever (742) is rotatably mounted on the side wall of the diaphragm pressing support and located on the side of the passive cam (741). A roller is provided at one end of the lifting lever (742) near the passive cam (741), and a sliding groove is provided at the other end. When the passive cam (741) rotates, it drives the lifting lever (744) through the roller. 2) Rotation; The above-mentioned pressing lifting seat (744) is slidably mounted on the side wall of the pressing support in the vertical direction. The bottom of the pressing lifting seat (744) is rotatably connected to the lifting dial (743), and the lifting dial (743) is provided with a corresponding dial groove; The above-mentioned lifting dial (745) is horizontally connected to the side wall of the pressing lifting seat (744), and the lifting dial (745) is horizontally provided with a strip-shaped dial groove (746); When the above-mentioned lifting lever (742) rotates, it drives the pressing lifting seat (744) and the lifting dial (745) to move up and down through the lifting dial (743).

5. A Z-type circulating film pressing and film stretching stacking machine according to claim 4, characterized in that: The membrane pressing translation component includes a translation lever (749), a translation roller (7410), a membrane pressing translation seat (7411), a membrane pressing roller (747), and a membrane pressing base (748). The translation lever (749) is rotatably mounted on the side wall of the membrane pressing support and located on the side of the passive cam (741). A roller is provided at one end of the translation lever (749) near the passive cam (741), and a groove is provided at the other end of the translation lever (749). When the passive cam (741) rotates, it drives the translation lever (749) to rotate via the roller. The membrane pressing translation seat (7411) is slidably connected to the side wall of the membrane pressing support in the horizontal direction. A translation roller (7410) is provided at the bottom of the membrane pressing translation seat (7411). The aforementioned pressure film seat (748) is slidably connected to the end wall of the pressure film translation seat (7411) in the vertical direction and moves linearly with the pressure film translation seat (7411); the pressure film seat (748) extends horizontally to the top of the pressure film support, and the diaphragm pressure plate (7412) is horizontally connected to the pressure film seat (748); the aforementioned pressure film roller (747) is connected to the lower end of the pressure film seat (748) and extends into the actuating groove (746), and slides freely in the actuating groove (746). When the pressure film seat (748) moves horizontally, the pressure film roller (747) slides linearly in the actuating groove (746) to avoid motion interference. When the lifting actuating seat (745) moves up and down, the pressure film seat (748) is driven to move up and down through the pressure film roller (747).

6. The Z-type circulating film pressing and film stretching stacking machine according to claim 1, characterized in that: It also includes a feeding device, which includes a feeding robot (8) and a feeding platform (9); wherein the feeding robot (8) is mounted above the stacking platform (7), and the feeding platform (9) is located on the side of the stacking platform (7); the feeding robot (8) includes a horizontal moving mechanism, a lifting moving mechanism and a clamping mechanism; at least two strip grooves (a) are spaced apart on the side of the feeding platform (9); the clamping mechanism picks up the material from the stacking platform (7), and moves it to the feeding platform (9) by being driven by the horizontal moving mechanism and the lifting moving mechanism; while the clamping mechanism is embedded in the strip groove (a), it places the stacked electrode diaphragm assembly on the feeding platform (9).

7. A Z-type circulating film pressing and film stretching stacking machine according to claim 6, characterized in that: The horizontal moving mechanism includes a linear module, a support plate (81), a horizontal drive motor (82), a horizontal lead screw (83), and a horizontal slide (84). The linear module is mounted above the stacking platform (7) in a direction perpendicular to the stacking platform (7). The support plate (81) is slidably connected to the linear module and connected to the output end of the linear module. The horizontal drive motor (82) is horizontally mounted on the side of the support plate (81). The horizontal lead screw (83) is rotatably inserted into the lower part of the support plate (81) and connected to the output end of the horizontal drive motor (82) via a transmission belt, and is driven to rotate by the horizontal drive motor (82). The horizontal slide (84) is slidably connected to the bottom of the support plate (81) and connected to the horizontal lead screw (83) via a lead screw seat. The rotation of the horizontal lead screw (83) drives the horizontal slide (84) to move along the direction of the horizontal lead screw (83).

8. A Z-type circulating film pressing and film stretching stacking machine according to claim 7, characterized in that: The lifting and moving mechanism includes a lifting drive motor (85), a vertical lead screw (86), and a lifting seat (87); wherein, the lifting drive motor (85) is vertically mounted on the side wall of the horizontal slide (84); the output end of the lifting drive motor (85) is arranged in the vertical direction; the vertical lead screw (86) is rotatably inserted vertically on the horizontal slide (84) and connected to the output end of the lifting drive motor (85) through a transmission belt, and is driven to rotate by the lifting drive motor (85); the lifting seat (87) is slidably connected to the horizontal slide (84) and connected to the vertical lead screw (86) through a lead screw seat; the rotation of the vertical lead screw (86) drives the lifting seat (87) to move along the direction of the vertical lead screw (86).

9. A Z-type circulating film pressing and film stretching stacking machine according to claim 8, characterized in that: The clamping mechanism includes a rotary motor (88), a gripper control cylinder (89), an upper gripper (810), and a lower gripper (811); wherein, the rotary motor (88) is mounted on the lifting seat (87); the gripper control cylinder (89) is connected to the output end of the rotary motor (88) and is driven to rotate by the rotary motor (88); the gripper control cylinder (89) is respectively provided with an upper output end that is vertically upward and a lower output end that is vertically downward; the upper gripper (810) and the lower gripper (811) are respectively mounted on the upper output end and the lower output end of the gripper control cylinder (89), and are driven by the gripper control cylinder (89) to move closer to each other or further away from each other, so as to clamp or release the stacked electrode and diaphragm assembly.

10. A Z-type circulating film pressing and film stretching stacking machine according to claim 9, characterized in that: The unloading platform (9) includes an unloading linear module (91), an unloading slide (92), an unloading pressure cylinder (93), and an unloading pressure plate (94); wherein, the unloading linear module (91) is horizontally arranged; the unloading slide (92) is arranged on the output end of the unloading linear module (91) and is driven to move linearly by the unloading linear module (91); at least two spaced strip grooves (a) are provided on the side of the unloading slide (92). The above-mentioned feeding and pressing cylinder (93) is located on the side of the feeding slide (92); the output direction of the feeding and pressing cylinder (93) is vertically set; the above-mentioned feeding pressing plate (94) is located on the output end of the feeding and pressing cylinder (93) and is driven to move up and down by the feeding and pressing cylinder (93); an electrode sheet and a diaphragm assembly are placed on the feeding slide (92), and the feeding and pressing cylinder (93) drives the feeding pressing plate (94) to press the electrode sheet and the diaphragm assembly together.

11. A stacking process for a Z-type circulating film pressing and stretching stacking machine as described in claim 1, characterized in that: The process includes the following steps: S1. Feeding and Transfer: The feeding conveyor belt of the feeding device feeds the positive and negative electrode sheets in a straight line along both sides of the machine. The feeding robot moves the electrode sheets from the feeding conveyor belt to the transfer platform. S2. Take the diaphragm: A set of moving carriers on the stacking platform presses the strip-shaped diaphragm from one side through the film-exiting roller below the film-exiting mechanism and then pulls the diaphragm and moves it in a straight line to the stacking station. The film-pressing mechanism flattens the diaphragm from both sides. S3, First stacking: After the diaphragm at the stacking station in step S2 is flattened, the transfer mechanism takes out the electrode from the transfer platform in step S1 and places it on the diaphragm. S4. Second stacking: After the first stacking in step S3 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm. One set of pressing mechanisms presses the strip diaphragm from the other side and moves the whole to another stacking station. The diaphragm is folded and covers the electrode in step S3. Then the transfer mechanism takes out another electrode from another transfer platform and places it on the diaphragm to complete the second stacking. S5. Circular Z-type stacking: After the second stacking in step S4 is completed, the two pressing mechanisms at the end of the electrode loosen the diaphragm, and one set of pressing mechanisms presses the diaphragm from one side and moves as a whole to the stacking station, where the first stacking in step S3 is completed; the stacking is repeated from step S3 to step S5 until the Z-type stacking of all electrodes is completed. S6. Feeding, diaphragm cutting and diaphragm splicing: After the electrode sheets are stacked in step S5, the moving carrier moves the electrode sheets to the feeding station. At the same time, another stacking platform moves to the stacking station near the feeding station to press the diaphragm. The diaphragm cutting mechanism set on the machine cuts the strip diaphragm for feeding. S7. Stacking on another platform: After one stacking platform completes the unloading in step S6, another stacking platform receives the release film from the stacking station and moves back and forth between the two stacking platforms, and stacks the film in the order of steps S3 to S5. S8. Material feeding, diaphragm cutting and diaphragm connection on another platform: After the stacking is completed in step S7, the other stacking platform moves to another material feeding station. After the stacking platform that completed the material feeding in step S6 moves to another stacking station and presses the diaphragm, the diaphragm is cut by the diaphragm cutting mechanism for material feeding. S9. Alternating Stacking: After pressing the diaphragm at another stacking station in step S8, the stacking platform moves to the stacking station and completes the cyclic Z-shaped stacking between the two stacking stations, and then unloads the material; the two stacking platforms alternate stacking and unloading in this way to achieve stacking without stopping the machine.

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