A fixed tablet-based lamination method and a lamination machine

Abstract

The application discloses a fixed tablet-based lamination method and a lamination machine. The fixed tablet-based lamination method comprises the following steps: obtaining to-be-laminated materials, and stacking the to-be-laminated materials on a lamination station one by one; after the lamination station receives the to-be-laminated materials, a fixed pressing cutter is controlled to press and fix the to-be-laminated materials, and the fixed pressing cutter is fixedly arranged on the lamination station; after the to-be-laminated materials are stacked, an electric core unit is obtained, and the electric core unit is transferred to a hot pressing station to perform hot pressing on the electric core unit. The fixed tablet-based lamination method can reduce the cost and structural complexity of a lamination table.

Description

Technical Field

[0001] This invention relates to the technical field of battery manufacturing, and in particular to a stacking method and stacking machine based on fixed pressing. Background Technology

[0002] The battery cell production process involves multiple steps, such as lamination, transfer, and hot pressing. Among these, the lamination process uses a stacking platform as a support base for stacking the electrodes.

[0003] However, in the existing method, each stack needs to be equipped with a pressure structure to assist in stacking, which leads to high stacking cost and complex structure. Summary of the Invention

[0004] This invention aims to address at least one of the technical problems existing in the prior art. To this end, this invention proposes a stacking method based on fixed compression, which can reduce the cost and structural complexity of the stacking platform.

[0005] The present invention also proposes a stacking machine for implementing the above-described stacking method based on fixed pressing.

[0006] A stacking method based on fixed compression according to a first aspect of the present invention includes the following steps: Obtain the sheet material to be stacked, and stack the sheet material one by one at the stacking station; After receiving the sheet material to be stacked, the stacking station controls a fixed pressure knife to press and fix the sheet material to be stacked. The fixed pressure knife is fixedly installed on the stacking station. After stacking the sheet materials, a battery cell unit is obtained. The battery cell unit is then transferred to the hot pressing station for hot pressing.

[0007] According to an embodiment of the present invention, a tablet stacking method based on fixed compression has at least the following beneficial effects: This invention fixes a fixed pressure knife on the stacking station, enabling it to assist different stacking platforms that sequentially enter the stacking station in pressing the wafers to be stacked. This eliminates the need for a separate, complex pressure knife drive or follow-up structure for each stacking platform, reducing the cost and structural complexity of the stacking platforms. Furthermore, by connecting the stacking process with the hot pressing process, the cell units are transferred to the hot pressing station after stacking, eliminating unnecessary waiting and transfer steps between processes, thus improving the overall efficiency and automation level of cell production.

[0008] According to some embodiments of the present invention, after receiving the sheet material to be stacked, the stacking station controls a fixed pressure knife to press and fix the sheet material to be stacked, including the following steps: Obtain the receiving information of the stacking station on the sheet material to be stacked, and generate pressing information based on the receiving information; In response to the clamping information of the pressure knife, the fixed pressure knife is controlled to clamp and fix the sheet material to be stacked; Obtain the stacking preparation position information of the next material to be stacked and transfer it to the stacking station, and generate pressing and releasing information based on the stacking preparation position information; In response to the tool release information, the fixed tool is controlled to release.

[0009] The advantages of this invention are: by acquiring the receiving information of the stacking station to drive the pressing knife to tighten, and by driving the pressing knife to loosen according to the preparation position information of the next piece of material to be stacked, the invention realizes the automated closed-loop control of the pressing and loosening actions of the fixed pressing knife. This ensures that the timing of the fixed pressing knife's operation is precisely matched with the receiving of the piece of material to be stacked and the arrival of the next piece of material. This not only ensures that the electrode is reliably fixed and misaligned during the current stacking process, but also allows for timely loosening when a new electrode needs to be received. This ensures the continuity and compactness of the stacking action, further improving the stacking accuracy and production efficiency.

[0010] According to some embodiments of the present invention, stacking the sheets to be stacked one by one on the stacking station includes the following steps: In response to the stacking task, the reflow stacking table is driven to move to the stacking station; The sheets to be stacked are stacked one by one on the return stacking platform of the stacking station.

[0011] The advantages are: By adopting a method of responding to the stacking task to drive the return stack to the stacking station, the present invention integrates the stacking and carrying functions of the wafers to be stacked with the production line flow function into the return stack. This simplifies the structure of the stacking station itself and gives the carrying platform the ability to actively flow, providing a hardware foundation for realizing automated and continuous flow between stacking and subsequent processes, which is conducive to building a flexible and efficient cell production line. Moreover, after the electrode stacking is completed on the return stack, the return stack moves to the subsequent station on the return track for processing, avoiding the problem of misalignment that exists when the stacked electrode is moved separately, thus improving the accuracy of stacking.

[0012] According to some embodiments of the present invention, after stacking the wafers to be stacked to obtain a battery cell unit, transferring the battery cell unit to a hot pressing station for hot pressing includes the following steps: Obtain the stacking status information at the stacking station; Based on the stacking status information, first stacking platform movement control information is generated; In response to the first stack movement control information, the return stack is driven to move back to transfer the battery cell unit.

[0013] The advantages are: This invention achieves intelligent linkage between the stacking process and the cell transfer process by automatically triggering the movement control of the return stack based on the stacking status information. As soon as the stacking is completed, control information is automatically generated to drive the return stack for return transport, eliminating the delay of manual judgment and intervention, ensuring that the cell unit can quickly and accurately enter the next processing stage, which helps to minimize the process changeover time and improve the overall flow efficiency and automation intelligence of the production line.

[0014] According to some embodiments of the present invention, generating first stacking platform movement control information based on the stacking state information includes the following steps: When the stacking status information is in the stacking completed state, the hot pressing status information is obtained; When the hot pressing status information indicates that the hot pressing is complete, the first stacking platform movement control information is generated. The first stacking platform movement control information is used to drive each return stacking platform to perform return movement.

[0015] The advantages of this invention are that by generating control information to drive the overall movement of the return stack only after determining that the stacking is complete and confirming that the hot pressing station has completed the previous hot pressing work, this dual-condition interlocking mechanism effectively avoids handling conflicts or production line blockages caused by the hot pressing station not being ready. It ensures the safety of the return stack movement and the coordinated matching of production rhythms between processes, making the entire production line run more smoothly and stably, and eliminating various hidden dangers caused by asynchronous rhythms between processes.

[0016] According to some embodiments of the present invention, driving the reflow stack to perform reflow movement includes the following steps: During the reflow movement of the reflow stack, the stack positioning information at the preheating position is obtained; Based on the stacking platform positioning information, determine the preheating docking information; Based on the preheating docking information, the reflow stack is heated to preheat the battery cells on the reflow stack.

[0017] The advantages of this invention are: by utilizing the time window during which the return stack passes through the preheating position during its movement, the battery cell unit is preheated by docking and heating it. This transforms the time that might otherwise be idle due to transportation into effective preheating time, allowing the battery cell to reach a certain temperature before entering the formal hot pressing process. This not only shortens the preheating time of the subsequent hot pressing process and improves the hot pressing efficiency, but also reduces the overall production cycle through process stacking, achieving a more compact and efficient process layout within a limited space.

[0018] According to some embodiments of the present invention, heating the reflow stack based on the preheating docking information includes the following steps: Based on the preheating docking information, a first docking drive signal is generated, which is used to drive the first docking structure to dock with the return stack. Based on the first docking drive signal, docking status information is collected; When the docking status information is docking in place, a preheating control signal is generated. The preheating control signal is used to control the first docking structure to be electrically connected to the return stack to heat the return stack.

[0019] The advantages are: This invention controls the docking of the first docking structure with the return stack by generating a docking drive signal, and only turns on the power to heat after the docking signal is collected. This creates a safe and reliable preheating self-test process. The mechanism of docking before powering on ensures the accuracy and safety of the electrical connection and prevents risks such as loose connection and short circuit. This precise docking preheating method improves the reliability, safety and energy utilization efficiency of preheating.

[0020] According to a second aspect of the present invention, a stacking machine is used to implement a stacking method based on fixed pressing according to a first aspect of the present invention. The stacking machine includes a stacking platform, a stacking device, a preheating docking device, and a hot pressing device. The stacking platform includes a recirculation stacking platform and a recirculation track. The recirculation stacking platform is capable of recirculating along the recirculation track. The stacking device, the preheating docking device, and the hot pressing device are sequentially arranged on the recirculation movement path of the recirculation stacking platform. The stacking device is used to stack the wafers to be stacked onto the recirculation stacking platform. The stacking device is equipped with a fixed pressing knife, which is used to press and fix the wafers to be stacked during the stacking process. The preheating docking device is configured to dock with and be energized to the recirculation stacking platform so that the recirculation stacking platform preheats the battery cell unit formed after stacking. The hot pressing device is used to hot press the preheated battery cell unit.

[0021] The stacking machine according to embodiments of the present invention has at least the following beneficial effects: This invention forms a continuous circular production layout by employing a return track and sequentially arranged stacking devices, preheating docking devices, and hot pressing devices. In particular, the fixed pressing knife on the stacking device assists in pressing the wafers to be stacked on the return stacking platform during the stacking process, eliminating the need to configure complex pressing knife drive or follow-up structures for each stacking platform, thus reducing the cost and structural complexity of the return stacking platform. At the same time, the cyclical movement of the return stacking platform along the return track organically connects the various dispersed processes into an automated production line. The transfer time window between the stacking device and the hot pressing device of the return stacking platform is used to preheat the cell units, which can reduce the hot pressing time of the hot pressing device and improve the hot pressing efficiency. This results in high integration of the entire equipment, small footprint, and significantly improved continuity, automation, and output efficiency of cell production.

[0022] According to some embodiments of the present invention, the preheating docking device is provided with a first docking structure located outside the return track, and a second docking structure is provided on the return stack. The first docking structure and the second docking structure are connected and energized to heat the return stack.

[0023] The advantages of this invention are: by employing a movable docking form between the preheating docking device and the return stack, using a first docking structure located outside the return track and a second docking structure on the return stack, it achieves electrical heating at the required location along the movement path. This non-fixed movable docking structure does not affect the normal movement and flow of the return stack, and can quickly and reliably establish an electrical connection at the specific location requiring preheating, ensuring the independence, flexibility, and high efficiency of heat conduction of the preheating function, while also facilitating installation and maintenance.

[0024] According to some embodiments of the present invention, the hot pressing device is provided with a plurality of hot pressing mechanisms, which are disposed on the left and / or right side of the return track. The return stack is capable of reciprocating between the return track and the hot pressing mechanisms. The hot pressing mechanisms are used to hot press the battery cells on the return stack.

[0025] The advantages of this invention are: by configuring multiple hot pressing mechanisms on one or both sides of the return track, and enabling the return stack to move back and forth between the return track and the hot pressing mechanisms for hot pressing, this distributed layout allows for parallel hot pressing of cell units on multiple return stacks simultaneously, eliminating the cycle bottleneck caused by a single hot pressing station. The collaborative work of multiple hot pressing mechanisms significantly increases the processing capacity and efficiency of the hot pressing process, matches the high-speed stacking cycle, and fully releases the overall production capacity potential, making it particularly suitable for large-scale high-efficiency cell production.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic flowchart of a stacking method based on fixed compression according to an embodiment of the present invention; Figure 2 for Figure 1The flowchart of step S1000 is shown; Figure 3 for Figure 1 The diagram shown is a partial flowchart of step S2000; Figure 4 for Figure 1 The flowchart of step S3000 is shown; Figure 5 for Figure 4 The flowchart of step S3200 is shown; Figure 6 for Figure 4 The diagram shown is a partial flowchart of step S3300; Figure 7 for Figure 6 The flowchart of step S3330 is shown; Figure 8 This is a schematic diagram of the stacking machine according to an embodiment of the present invention; Figure 9 for Figure 8 The front view shown; Figure 10 for Figure 8 The diagram shows the structure of the lamination device; Figure 11 Figure 8 shows a schematic diagram of the preheating docking device. Figure 12 for Figure 11 The enlarged view of point A is shown.

[0029] Reference numerals: 100-Stacking device, 110-Stacking plate device, 120-Preheating docking device, 130-Hot pressing device, 140-Return stacking platform, 150-Return track, 160-Fixed pressure knife, 170-First docking structure, 180-Second docking structure, 190-Hot pressing mechanism. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0032] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, this is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 12 This invention describes a stacking method and stacking machine based on fixed pressing according to embodiments of the present invention.

[0035] The present invention aims to provide an embodiment of a tablet stacking method and a tablet stacking machine based on fixed compression.

[0036] Reference Figure 1 A stacking method based on fixed compression according to a first aspect embodiment of the present invention may include, but is not limited to, steps S1000 to S3000.

[0037] Step S1000: Obtain the sheet material to be stacked and stack the sheet material one by one on the stacking station.

[0038] In step S2000, after receiving the stacking material at the stacking station, the fixed pressing knife 160 is controlled to press and fix the stacking material. The fixed pressing knife 160 is fixedly set on the stacking station.

[0039] Step S3000: After stacking the sheets to be stacked, a cell unit is obtained. The cell unit is then transferred to the hot pressing station for hot pressing.

[0040] It is understood that in steps S1000 to S3000 of the embodiments of the present invention, by fixing the fixed pressing knife 160 on the stacking station, the fixed pressing knife 160 can assist different stacking platforms that enter the stacking station sequentially in pressing the materials to be stacked. There is no need to configure a complex pressing knife drive or follow-up structure for each stacking platform, which can reduce the cost and structural complexity of the stacking platform. At the same time, by connecting the stacking process with the hot pressing process, the cell unit is transferred to the hot pressing station after stacking is completed, eliminating unnecessary waiting and transfer links between processes, which is conducive to improving the overall efficiency and automation level of cell production.

[0041] Reference Figure 2 In some embodiments, step S1000 involves stacking the sheets to be stacked one by one on the stacking station, which may include, but is not limited to, steps S1100 to S1200.

[0042] In step S1100, in response to the stacking task, the reflow stacking stage 140 is driven to move to the stacking station.

[0043] Step S1200: Stack the sheets to be stacked one by one on the reflow stacking table 140 of the stacking station.

[0044] It is understood that steps S1100 to S1200 of the present invention integrate the stacking and production line flow functions of the wafers to be stacked into the return stack 140 by using the method of responding to the stacking task to drive the return stack 140 to the stacking station. This simplifies the structure of the stacking station itself and gives the carrying platform the ability to actively flow, providing a hardware foundation for realizing the automated and continuous flow between stacking and subsequent processes, which is conducive to building a flexible and efficient cell production line. Moreover, after the electrode stacking is completed on the return stack 140, the return stack 140 moves to the subsequent station on the return track 150 for processing, avoiding the problem of easy misalignment that requires moving the stacked electrode separately, and improving the accuracy of stacking.

[0045] In some specific embodiments, a robotic arm can be used to drive a stacking gripper to grab and move the sheet material to be stacked from the loading area to the stacking station, and then release the sheet material to be stacked on the return stacking table 140 of the stacking station. Thus, the automatic grabbing and stacking of the sheet material to be stacked is realized, and the degree of automation of stacking is improved.

[0046] Reference Figure 3 In some embodiments, in step S2000, after the stacking station receives the sheet to be stacked, it controls the fixed pressure knife 160 to press and fix the sheet to be stacked, which may include, but is not limited to, steps S2100 to S2400.

[0047] Step S2100: Obtain the receiving information of the stacking station for the stacked material, and generate the pressing information of the pressing knife based on the receiving information.

[0048] In step S2200, in response to the clamping information of the clamping knife, the fixed clamping knife 160 is controlled to clamp and fix the stacked sheets.

[0049] Step S2300: Obtain the stacking preparation position information of the next material to be stacked and transfer it to the stacking station, and generate the pressing and releasing knife information based on the stacking preparation position information.

[0050] In step S2400, in response to the tool release information, the fixed tool 160 is controlled to release.

[0051] It is understood that steps S2100 to S2400 of the present invention drive the pressing knife to tighten by acquiring the receiving information of the stacking station, and drive the pressing knife to loosen according to the preparation position information of the next piece of material to be stacked. This realizes the automated closed-loop control of the pressing and loosening actions of the fixed pressing knife 160, so that the timing of the operation of the fixed pressing knife 160 is precisely matched with the receiving of the piece of material to be stacked and the arrival of the next piece of material. This ensures that the electrode is reliably fixed and misaligned during the current stacking process, and can be released in time when a new electrode needs to be received. This ensures the continuity and compactness of the stacking action, and further improves the stacking accuracy and production efficiency.

[0052] Reference Figure 4 In some embodiments, step S3000, after stacking the sheet materials to be stacked, a cell unit is obtained. The cell unit is then transferred to a hot pressing station to perform hot pressing on the cell unit. This may include, but is not limited to, steps S3100 to S3300.

[0053] Step S3100: Obtain the stacking status information on the stacking station.

[0054] Step S3200: Generate first stacking stage movement control information based on the stacking status information.

[0055] In step S3300, in response to the first stack movement control information, the return stack 140 is driven to move back to transfer the battery cell unit.

[0056] It is understood that steps S3100 to S3300 of the present invention automatically trigger the movement control of the return stack 140 based on the stacking status information, realizing intelligent linkage between the stacking process and the cell transfer process. Once the stacking is completed, control information is automatically generated to drive the return stack 140 to perform return handling, eliminating the delay of manual judgment and intervention, ensuring that the cell unit can quickly and accurately enter the next processing stage, which helps to minimize the process changeover time and improve the overall flow efficiency and automation intelligence of the production line.

[0057] Reference Figure 5 In some embodiments, step S3200, generating first stacking platform movement control information based on stacking status information, may include, but is not limited to, steps S3210 to S3220.

[0058] Step S3210: If the stacking status information is "stacking completed", obtain the hot pressing status information.

[0059] In step S3220, when the hot pressing status information is in the hot pressing completed state, the first stacking platform movement control information is generated. The first stacking platform movement control information is used to drive each return stacking platform 140 to perform return movement.

[0060] It is understood that in steps S3210 to S3220 of the present invention, control information for driving the overall movement of the return stack 140 is generated only after the stacking is determined to be completed and the hot pressing station has been confirmed to have completed the previous hot pressing work. This dual-condition interlocking mechanism effectively avoids handling conflicts or production line blockages caused by the hot pressing station not being ready, ensures the safety of the movement of the return stack 140 and the coordinated matching of production rhythms between processes, makes the entire production line run more smoothly and stably, and eliminates various hidden dangers caused by asynchronous rhythms between processes.

[0061] Reference Figure 6 In some embodiments, step S3300, driving the reflow stack 140 to perform reflow movement, may include, but is not limited to, steps S3310 to S3330.

[0062] Step S3310: During the reflow movement of the reflow stack 140, obtain the stack positioning information of the preheating position.

[0063] Step S3320: Determine the preheating docking information based on the stacking platform positioning information.

[0064] Step S3330: Based on the preheating docking information, the return stack 140 is heated to preheat the cell units on the return stack 140.

[0065] It is understood that steps S3310 to S3330 of the present invention utilize the time window during which the return stack 140 passes through the preheating position during its movement to preheat the battery cell unit by docking and heating it. This transforms the time that might otherwise be idle due to transportation into effective preheating time, allowing the battery cell to reach a certain temperature before entering the formal hot pressing process. This not only shortens the preheating time of the subsequent hot pressing process and improves the hot pressing efficiency, but also reduces the overall production cycle through process stacking, achieving a more compact and efficient process layout within a limited space.

[0066] Reference Figure 7In some embodiments, step S3330 involves heating the reflow stack 140 based on preheating docking information, which may include, but is not limited to, steps S3331 to S3333.

[0067] Step S3331: Based on the preheating docking information, a first docking drive signal is generated. The first docking drive signal is used to drive the first docking structure 170 to dock with the return stack 140.

[0068] Step S3332: Based on the first docking drive signal, collect docking status information.

[0069] In step S3333, when the docking status information is docking in place, a preheating control signal is generated. The preheating control signal is used to control the first docking structure 170 to be electrically connected to the return stack 140 so as to heat the return stack 140.

[0070] It is understood that steps S3331 to S3333 of the present invention control the first docking structure 170 to dock with the return stack 140 by generating a docking drive signal, and only turn on the power to heat after the docking signal is collected. This establishes a safe and reliable preheating self-test process. The mechanism of docking before powering on ensures the accuracy and safety of the electrical connection and prevents risks such as loose connection and short circuit. This precise docking preheating method improves the reliability, safety and energy utilization efficiency of preheating.

[0071] In some specific embodiments, after the return stack 140 completes the hot pressing of the battery cell at the hot pressing station, the return stack 140 transports the battery cell away from the hot pressing station. Then, a robotic arm can be used to drive the unloading gripping fixture to grab and unload the battery cell on the return stack 140. The unloaded return stack returns along the return track 150, thereby improving the unloading efficiency and automation of the battery cell.

[0072] Reference Figure 8 , Figure 9 and Figure 10The stacking machine of the second aspect of the present invention is used to implement a stacking method based on fixed compression according to the first aspect of the present invention. The stacking machine includes a stacking platform device 100, a stacking device 110, a preheating docking device 120, and a hot pressing device 130. The stacking platform device 100 includes a return stacking platform 140 and a return track 150. The return stacking platform 140 is capable of returning along the return track 150. The stacking device 110, the preheating docking device 120, and the hot pressing device 130 are sequentially arranged in the return stacking platform. On the return movement path of the stacking platform 140; the stacking device 110 is used to stack the sheet material to be stacked onto the stacking platform 140. The stacking device 110 is equipped with a fixed pressure knife 160, which is used to press and fix the sheet material to be stacked during the stacking process; the preheating docking device 120 is configured to dock and be energized with the stacking platform 140 so that the stacking platform 140 preheats the battery cell unit formed after stacking; the hot pressing device 130 is used to hot press the preheated battery cell unit.

[0073] It is understood that this embodiment, by employing a return track 150 and sequentially arranged stacking device 110, preheating docking device 120, and hot pressing device 130, forms a circular continuous production layout. In particular, the fixed pressing knife 160 configured on the stacking device 110 assists in pressing the wafers to be stacked on the return stacking platform 140 during the stacking process, eliminating the need to configure a complex pressing knife drive or follow-up structure for each stacking platform, thereby reducing the cost and structural complexity of the return stacking platform 140. At the same time, the cyclical movement of the return stacking platform 140 along the return track 150 organically connects the various dispersed processes into an automated production line. The transfer time window of the return stacking platform 140 between the stacking device 110 and the hot pressing device 130 is used to preheat the cell units, which can reduce the hot pressing time of the hot pressing device 130 and improve the hot pressing efficiency. This results in high integration of the entire equipment, small footprint, and significantly improved continuity, automation, and output efficiency of cell production.

[0074] It should be noted that, since the stacking machine in the second aspect embodiment adopts at least all the technical solutions of the stacking method based on fixed pressing in the first aspect embodiment, the stacking machine in the second aspect embodiment of the present invention can at least realize all the functions specifically implemented by the stacking method based on fixed pressing in the first aspect embodiment, and can at least achieve all the beneficial effects achieved by the stacking method based on fixed pressing in the first aspect embodiment, which will not be repeated here.

[0075] In some specific embodiments, the return track 150 can be arranged in a ring or rectangle to form a circulating flow path.

[0076] Furthermore, the return track 150 may include a transport section and a return section distributed vertically. The return section is located below the transport section. The stacking device 110, the preheating docking device 120, and the hot pressing device 130 are arranged in the transport section. The return stack 140 transports the battery cells along the transport section and returns empty along the return section. Thus, by utilizing a double-layer distribution arrangement, the return track 150 can complete the uninterrupted circulation of the stack within a limited space, improving the equipment space utilization and overall operating efficiency. At the same time, the return section being located below the transport section can avoid interfering with the structural layout and processing operation space of the processing devices such as the stacking device 110, the preheating docking device 120, and the hot pressing device 130.

[0077] In some specific embodiments, the return track 150 can use a magnetic levitation track structure to drive the conveyor plate to move, and the return stack 140 is set on the conveyor plate; or, the return track 150 can also use a magnetic levitation track structure to directly drive the return stack 140 to move; or, the return track 150 can also use a traditional mechanical conveying structure to convey the return stack 140, which will not be elaborated here.

[0078] Reference Figure 11 and Figure 12 In some specific embodiments, the preheating docking device 120 is provided with a first docking structure 170 located outside the return track 150, and a second docking structure 180 is provided on the return stack 140. The first docking structure 170 and the second docking structure 180 are connected and energized to heat the return stack 140.

[0079] It is understood that this embodiment achieves electrical heating at the required location on the movement path by adopting a movable docking form between the preheating docking device 120 and the return stack 140 using a first docking structure 170 configured outside the return track 150 and a second docking structure 180 on the return stack 140. This non-fixed movable docking structure does not affect the normal movement of the return stack 140, and can quickly and reliably establish an electrical connection at the specific location where preheating is required, ensuring the independence, flexibility and high efficiency of heat conduction of the preheating function, while also facilitating installation and maintenance.

[0080] Furthermore, multiple first docking structures 170 can be provided, and multiple first docking structures 170 are arranged along the moving direction of the return stack 140. One first docking structure 170 is docked and energized with a second docking structure 180 on a return stack 140.

[0081] It is understood that in this embodiment, by arranging multiple first docking structures 170 along the moving direction of the return stack 140, and by connecting each first docking structure 170 to a second docking structure 180 on a return stack 140 one by one, multiple return stacks 140 located at different positions of the preheating docking device 120 can be heated simultaneously. Moreover, each return stack 140 can be heated multiple times during its passage through the preheating docking device 120, taking into account both the conveying cycle and the preheating time, achieving efficient online preheating and adapting to the high-speed production rhythm.

[0082] Refer again Figure 8 In some specific embodiments, the hot pressing device 130 is provided with a plurality of hot pressing mechanisms 190, which are arranged on the left and / or right side of the return track 150. The return stack 140 can move back and forth between the return track 150 and the hot pressing mechanism 190. The hot pressing mechanism 190 is used to hot press the battery cell unit on the return stack 140.

[0083] It is understood that this embodiment, by configuring multiple hot pressing mechanisms 190 on one or both sides of the return track 150 and enabling the return stack 140 to move back and forth between the return track 150 and the hot pressing mechanism 190 for hot pressing, allows the simultaneous parallel hot pressing of multiple cell units on multiple return stacks 140, eliminating the cycle bottleneck caused by a single hot pressing station. The collaborative work of multiple hot pressing mechanisms 190 significantly increases the processing capacity and efficiency of the hot pressing process, matches the high-speed stacking cycle, and fully releases the overall production capacity potential, making it particularly suitable for large-scale high-efficiency cell production.

[0084] In the description of this specification, the references to terms such as "an embodiment, some embodiments, illustrative embodiments, example, specific example, or examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0085] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0086] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0087] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0088] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method for stacking tablets based on fixed compression, characterized in that, Includes the following steps: Obtain the sheet material to be stacked, and stack the sheet material one by one at the stacking station; After receiving the sheet material to be stacked, the stacking station controls the fixed pressure knife (160) to press and fix the sheet material to be stacked. The fixed pressure knife (160) is fixedly set on the stacking station. After stacking the sheet materials, a battery cell unit is obtained. The battery cell unit is then transferred to the hot pressing station for hot pressing.

2. The stacking method based on fixed compression according to claim 1, characterized in that, After receiving the sheet material to be stacked, the stacking station controls the fixed pressure knife (160) to press and fix the sheet material to be stacked, including the following steps: Obtain the receiving information of the stacking station on the sheet material to be stacked, and generate pressing information based on the receiving information; In response to the pressing information of the pressing knife, the fixed pressing knife (160) is controlled to press and fix the sheet material to be stacked; Obtain the stacking preparation position information of the next material to be stacked and transfer it to the stacking station, and generate pressing and releasing information based on the stacking preparation position information; In response to the knife release information, the fixed knife (160) is controlled to release.

3. The stacking method based on fixed compression according to claim 1, characterized in that, The step of stacking the sheets to be stacked one by one on the stacking station includes the following steps: In response to the stacking task, the reflow stack (140) is driven to move to the stacking station; The sheets to be stacked are stacked one by one on the return stacking table (140) of the stacking station.

4. The stacking method based on fixed compression according to claim 1, characterized in that, After stacking the sheet materials, a battery cell unit is obtained. The battery cell unit is then transferred to a hot pressing station for hot pressing, which includes the following steps: Obtain the stacking status information at the stacking station; Based on the stacking status information, first stacking platform movement control information is generated; In response to the first stack movement control information, the return stack (140) is driven to perform return movement in order to transport and transfer the battery cell.

5. The stacking method based on fixed compression according to claim 4, characterized in that, The step of generating the first stacking platform movement control information based on the stacking state information includes the following steps: When the stacking status information is in the stacking completed state, the hot pressing status information is obtained; When the hot pressing status information is in the hot pressing completed state, the first stack movement control information is generated. The first stack movement control information is used to drive each return stack (140) to perform return movement.

6. The stacking method based on fixed compression according to claim 4, characterized in that, The process of driving the recirculation stack (140) to move back includes the following steps: During the reflow movement of the reflow stack (140), the stack positioning information of the preheating position is obtained; Based on the stacking platform positioning information, determine the preheating docking information; Based on the preheating docking information, the return stack (140) is heated to preheat the cell unit on the return stack (140).

7. The stacking method based on fixed compression according to claim 6, characterized in that, The heating of the reflow stack (140) based on the preheating docking information includes the following steps: Based on the preheating docking information, a first docking drive signal is generated. The first docking drive signal is used to drive the first docking structure (170) to dock with the return stack (140). Based on the first docking drive signal, docking status information is collected; When the docking status information is docking in place, a preheating control signal is generated. The preheating control signal is used to control the first docking structure (170) to be electrically connected to the return stack (140) so as to heat the return stack (140).

8. A stacking machine, characterized in that, For implementing a stacking method based on fixed pressing as described in any one of claims 1 to 7, the stacking machine includes a stacking platform device (100), a stacking device (110), a preheating docking device (120), and a hot pressing device (130). The stacking device (100) includes a return stacking platform (140) and a return track (150). The return stacking platform (140) can move back along the return track (150). The stacking device (110), the preheating docking device (120), and the hot pressing device (130) are sequentially arranged on the return movement path of the return stacking platform (140). The stacking device (110) is used to stack the sheet material to be stacked onto the return stacking platform (140). The stacking device (110) is equipped with a fixed pressure knife (160), which is used to press and fix the sheet material to be stacked during the stacking process. The preheating docking device (120) is configured to dock with and be energized with the return stack (140) so that the return stack (140) preheats the battery cell unit formed after stacking. The hot pressing device (130) is used to hot press the preheated battery cell.

9. The stacking machine according to claim 8, characterized in that, The preheating docking device (120) is provided with a first docking structure (170) located outside the return track (150), and a second docking structure (180) is provided on the return stack (140). The first docking structure (170) and the second docking structure (180) are connected and energized to heat the return stack (140).

10. The stacking machine according to claim 8, characterized in that, The hot pressing device (130) is provided with a plurality of hot pressing mechanisms (190), which are located on the left and / or right side of the return rail (150). The return stack (140) is capable of moving back and forth between the return rail (150) and the hot pressing mechanism (190). The hot pressing mechanism (190) is used to hot press the battery cell on the return stack (140).

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