A cell lamination method and a cell structure forming method

Abstract

The application relates to the technical field of batteries, and discloses a battery cell lamination method and a battery cell structure forming method. The battery cell lamination method comprises the following steps: conveying a material belt to a material table for stacking; and pulling a current battery cell unit to be stacked in the material belt, so that the current battery cell unit to be stacked moves to a preset position along the extension direction of the material table. The battery cell lamination method provided by the application can make the current battery cell unit to be stacked move to the preset position along the extension direction of the material table by pulling the current battery cell unit to be stacked in the material belt. When a plurality of battery cell units to be stacked are located at the preset positions, the uniformity of the battery cell structure can be improved. Therefore, the battery cell lamination method provided by the application can improve the stacking uniformity of the battery cell structure, improve the lamination process precision, and reduce the safety hazards of the battery caused by poor stacking uniformity.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method for stacking battery cells and a method for forming battery cell structures. Background Technology

[0002] Due to the development trend of lithium batteries, cell forming technology plays a very important role. In the manufacturing process of lithium batteries, the preparation of cell structure is a key technology, and the cell structure is composed of multiple cell units stacked together.

[0003] During the cell manufacturing process, the material strip is fed onto a feeding platform via a feeding mechanism to stack and form a cell structure. Specifically, during the feeding process, cell units and separators are alternately fed onto the feeding platform to achieve cell unit stacking. However, during the stacking process, the end faces of the cell units are not easily aligned, resulting in poor uniformity of the stacked cell structure.

[0004] Therefore, there is an urgent need to provide a stacking device that can improve the stacking neatness of cell units within the cell structure. Summary of the Invention

[0005] This application provides a method for stacking battery cells and a method for forming battery cell structures to improve the neatness of the stacking of battery cell units within the formed battery cell structure.

[0006] To achieve the above objectives, this application provides the following technical solution: According to a first aspect of this application, a method for stacking battery cells is provided, comprising: The material strip is fed to the material platform for stacking; The current discharge core unit to be stacked is pulled in the material strip, so that the current discharge core unit to be stacked moves to a preset position along the extension direction of the material platform.

[0007] The cell stacking method provided in this application moves the cell unit to a preset position along the extension direction of the stack by pulling the cell unit to be stacked in the strip. When multiple cell units to be stacked are all in the preset position, the neatness of the cell structure can be improved.

[0008] It should be noted that the cell stacking method provided in this application can improve the stacking neatness of the cell structure, improve the stacking process accuracy, and at the same time reduce the battery safety hazards caused by poor stacking neatness.

[0009] In one embodiment of this application, the method for moving the current discharge core unit to be stacked to a preset position along the extension direction of the material platform includes: using a stop portion to limit the maximum moving distance of the current discharge core unit to be stacked along the extension direction of the material platform.

[0010] In one embodiment of this application, the method of pulling the current discharge core unit to be stacked in the strip includes: pulling each current discharge core unit to be stacked in the strip.

[0011] In one embodiment of this application, the method of using a stop portion to limit the maximum moving distance of the current discharge core unit to be stacked along the extension direction of the material platform includes: using one side of the stop portion to block the first electrode in the current discharge core unit to be stacked during the movement, so that the distance between the diaphragm and the side end face of the first electrode is approximately 0.

[0012] In one embodiment of this application, the method of feeding the material strip to the material table includes: discharging a battery cell unit from the material strip using a discharge port of a discharge mechanism, the battery cell unit forming a battery cell unit to be stacked and discharged; at least a portion of the discharge mechanism adsorbs the membrane between the battery cell unit discharged from the discharge port and the battery cell unit to be discharged.

[0013] In one embodiment of this application, before the feeding mechanism feeds out a battery cell unit from the feeding port, the method further includes: using a detection mechanism to detect the offset of the feeding strip along the width direction of the feeding strip; The feeding mechanism moves relative to the base along the width direction of the feed strip according to the offset, wherein the base is fixed relative to the feed table.

[0014] In one embodiment of this application, before feeding the material strip to the material table, the method further includes: Adjust the discharge angle of the discharge mechanism relative to the base.

[0015] In one embodiment of this application, after the method of feeding the material strip to the material table for stacking, the method further includes: using a limiting mechanism to limit the front end height of the stacked battery cells on the material table.

[0016] According to a second aspect of this application, a method for forming a battery cell structure is provided, including any of the battery cell stacking methods provided by the above-described technical solutions.

[0017] In one embodiment of this application, before performing the cell stacking method, the method further includes: attaching the first electrode and the second electrode to both sides of the separator using a bonding device to form a strip. Attached Figure Description

[0018] To better understand this disclosure, reference may be made to the embodiments shown in the following figures. Components in the figures are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of this disclosure. Additionally, related elements or components may have different arrangements as known in the art. Furthermore, in the figures, the same reference numerals denote the same or similar components in various figures. Wherein: Figure 1 This is a schematic diagram of the material strip structure provided in an embodiment of this application; Figure 2 A flowchart of the cell stacking method provided in the embodiments of this application; Figure 3 This is another flowchart of the cell stacking method provided in the embodiments of this application; Figure 4 This is another flowchart of the cell stacking method provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the battery cell production equipment provided in the embodiments of this application; Figure 6 This is a first schematic diagram of the electrode correction and transmission device provided in the embodiments of this application; Figure 7 for Figure 6 The first sectional view at point AA; Figure 8 for Figure 6 The second sectional view at point AA; Figure 9 This is a second schematic diagram of the electrode correction and transmission device provided in the embodiments of this application; Figure 10 This is a third schematic diagram of the electrode correction and transmission device provided in the embodiments of this application; Figure 11 for Figure 10 Sectional view at point AA; Figure 12 for Figure 5 A schematic diagram of a stacking device shown in the figure; Figure 13 A schematic diagram of a material pulling mechanism provided in an embodiment of this application; Figure 14 , Figures 15 to 16 To demonstrate the structural diagram; Figure 17 This is a schematic diagram of a second structure for the material pulling mechanism provided in the embodiments of this application; Figure 18 This is a schematic diagram of a third structure for the material pulling mechanism provided in the embodiments of this application; Figure 19 A schematic diagram of a limiting mechanism provided in an embodiment of this application; Figure 20 A schematic diagram of a material platform provided in an embodiment of this application; Figure 21 for Figure 12 A three-dimensional structural diagram of the feeding mechanism; Figure 22 for Figure 21A side view of the feeding mechanism; Figure 23 for Figure 21 A second side view of the feeding mechanism; Figure 24 for Figure 21 A third side view of the feeding mechanism; Figure 25 for Figure 5 A schematic diagram of the second structure of the stacking device shown; Figure 26 for Figure 25 A schematic diagram after the diaphragm has moved. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To gain a clearer understanding of the cell stacking method provided in the embodiments of this application, the material strip structure and cell structure will now be described. Figure 1 This is a schematic diagram of the structure of the strip 001 provided in an embodiment of this application. Figure 1 The structure shown contains multiple components such as strip 001. Figure 1 The shown cell unit 01 is arranged at intervals along the extension direction of the feed strip 001 and connected by a separator 02. It should be understood that each cell unit 01 includes an intermediate separator 011 and a first electrode 012 and a second electrode 013 disposed on both sides of the intermediate separator 011, wherein the first electrode 012 and the second electrode 013 have opposite polarities. When the first electrode 012 is a positive electrode, the second electrode 013 is a negative electrode; conversely, when the first electrode 012 is a negative electrode, the second electrode 013 is a positive electrode. It is noteworthy that the intermediate separator 011 in the cell unit 01 and the separator 02 between adjacent cell units 01 are a continuous structure. After the feed strip 001 is discharged by the feeding mechanism, several cell units 01 are stacked to form a cell structure.

[0021] Firstly, the embodiments of this application provide a method for stacking battery cells, such as... Figure 2 As shown, the method includes: step S201: feeding the strip 001 to the material table for stacking; Step S202: Pull the current discharge core unit 01 to be stacked in the material strip 001, so that the current discharge core unit 01 to be stacked moves to the preset position along the extension direction of the material table.

[0022] When applying the cell stacking method provided in this application embodiment, the cell unit 01 to be stacked in the material strip 001 can be pulled to move it to a preset position along the extension direction of the material table. When multiple cell units 01 to be stacked are all in the preset position, the neatness of the cell structure can be improved. It should be understood that "preset position" refers to the desired or specified placement position of the cell unit 01 to be stacked. The cell unit 01 to be stacked refers to the cell unit 01 to be stacked on the material table. If the "cell unit 01 to be stacked" has already completed the stacking operation on the material table, the next cell unit adjacent to the cell unit 01 in the material strip 001 will be the cell unit 01 to be stacked. It should be noted that the cell stacking method provided in this application embodiment can improve the stacking neatness of the cell structure and the stacking process accuracy. At the same time, it can reduce the battery safety hazards caused by poor stacking neatness.

[0023] In practice, a pulling mechanism such as rollers, brushes, negative pressure mechanisms, robotic arms, or magnetic mechanisms can be used to pull the current discharge core unit 01 to be stacked. Of course, the pulling operation of the current discharge core unit 01 to be stacked can be carried out while the core unit 01 is moving, or it can be carried out after the core unit 01 stops moving.

[0024] It is worth noting that there are multiple possibilities for pulling the current discharge cell unit 01 to be stacked in step S202. One possible approach is to pull a certain current discharge cell unit 01 that has not reached the preset position; another possible approach is to pull each current discharge cell unit 01 to be stacked in the material strip 001. It is also worth noting that when using the cell stacking method provided in the embodiments of this application, it is even possible to simultaneously pull multiple cell units 01 stacked on the material platform to pull the cell unit 01 to the preset position, the details of which will not be elaborated here.

[0025] It should be noted that by pulling each currently stacked discharge core unit 01, each core unit 01 in the cell structure can be positioned at a preset location, thereby improving the neatness of the cell structure. Taking the pulling mechanism pulling each currently stacked discharge core unit 01 as an example, in one embodiment, the method of moving the currently stacked discharge core unit 01 to the preset position along the extension direction of the material table in step S201 includes: using a stop to limit the maximum movement distance of the currently stacked discharge core unit 01 along the extension direction of the material table.

[0026] Specifically, while the pulling mechanism pulls the current discharge core unit 01 to be stacked, the stop part limits the maximum movement distance of the current discharge core unit 01 to be stacked along the extension direction of the material platform, thereby improving the neatness of the stacking of the battery cell structure.

[0027] In one specific embodiment, since the size 012 of the first electrode in the cell unit 01 may be slightly larger than the second electrode 013, a stop can be provided on one side of the material platform. The stop can then be used to block the first electrode 012 in the cell unit 01 to be stacked during movement, ensuring that the distance between the diaphragm 02 and the side end face of the first electrode 012 is approximately 0. It should be understood that "approximately 0" means that the gap between the diaphragm 02 and the side end face of the first electrode 012 is small, and the distance between them can be 0mm, 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1mm.

[0028] Specifically, when the pulling mechanism pulls the current discharge cell unit 01 to be stacked, the current discharge cell unit 01 will move towards the stop under the pulling force until the side end face of the first electrode 012 abuts against the stop. It should be noted that the cell structure formed by this cell stacking method can reduce the distance between the side end faces of the separator 02 and the first electrode 012, thereby shortening the allowance of the separator 02 relative to the first electrode 012, improving the stacking neatness of the cell structure, improving the stacking process accuracy, reducing battery space waste, reducing the amount of separator 02 used to reduce costs, and reducing battery safety hazards caused by poor stacking neatness.

[0029] In one embodiment, the method of feeding the material strip 001 to the material table in step S201 includes: Step S301: Discharge one battery cell unit 01 from the material strip 001 using the discharge port of the discharge mechanism, and the battery cell unit 01 forms a battery cell unit 01 to be stacked and discharged. Step S302: At least part of the discharge mechanism adsorbs the membrane 02 between the battery cell unit 01 discharged from the discharge port and the battery cell unit 01 to be discharged.

[0030] It should be noted that in step S302, by setting at least part of the feeding mechanism to have an adsorption function, the material strip 001 can pull the diaphragm 02 between adjacent cell units 01 in the opposite direction when it passes through the feeding port, so as to improve the flatness of the diaphragm 02 between adjacent cell units 01 in the stacked structure, thereby further improving the neatness of the cell structure stacking and improving the accuracy of the stacking process.

[0031] In one embodiment, before performing step S301, the cell stacking method provided in this application embodiment further includes: Step S401: Use a detection mechanism to detect the offset of the material strip 001 along the width direction; Step S402: Based on the offset, move the feeding mechanism relative to the base along the width direction of the material strip 001. The base is fixed relative to the material table.

[0032] It should be noted that after the detection mechanism measures the offset of the material strip 001 along the width direction in step S401, the material feeding mechanism can be controlled to move relative to the base based on the measured offset to correct the offset of the material strip 001. Specifically, the offset of the material strip 001 can be offset by controlling the amount of movement of the material feeding mechanism relative to the base in the width direction of the material strip 001.

[0033] Therefore, the cell stacking method provided in this application embodiment can be flexibly adjusted along the width direction of the strip 001 to achieve the strip 001 correction effect, thereby improving the accuracy of material output.

[0034] Furthermore, since the size of the cell unit 01 in the strip 001 may be adjusted as needed, or the feeding direction of the feeding mechanism needs to be adjusted relative to the feeding platform, the feeding angle of the feeding mechanism can be adjusted before or during feeding. In one embodiment, before performing step S201, the cell stacking method provided in this application embodiment further includes: adjusting the feeding angle of the feeding mechanism relative to the base.

[0035] It should be noted that the cell stacking method provided in this application embodiment can improve the accuracy of material feeding, so that the cell unit 01 can be stacked on the material platform in a better posture, thereby improving the neatness of the cell structure stacking.

[0036] In one embodiment, after performing step S201, the cell stacking method provided in this application embodiment further includes: using a limiting mechanism to limit the front end height of the stacked cell units 01 on the material platform.

[0037] It should be noted that the cell stacking method provided in this embodiment can limit the cell unit 01 falling onto the material platform by setting a limiting mechanism, thereby preventing the front end of the cell unit 01 from tilting up during the stacking process. It should be understood that "front end" refers to the end of the cell unit 01 that first arrives at the material platform. In other words, "front end" refers to the end of the cell unit 01 closest to the stop. Similarly, "rear end" refers to the end of the cell unit 01 furthest from the stop.

[0038] It is worth noting that the limiting mechanism can limit the battery cell unit 01 during the pulling operation of the battery cell unit 01 to be stacked, or it can be performed after the pulling operation.

[0039] Since the rear end of the battery cell 01 may tilt upwards during the stacking process, potentially blocking the discharge port, a ramp can be provided on the material platform. In one embodiment, the ramp creates a clearance space, allowing the rear end of the stacked battery cell 01 to bend downwards along the ramp to avoid blocking the discharge port.

[0040] Secondly, embodiments of this application also provide a method for forming a battery cell structure, including any of the battery cell stacking methods provided by the above-mentioned technical solutions.

[0041] In one embodiment, prior to the cell stacking method, the method further includes: attaching the first electrode 012 and the second electrode 013 to both sides of the separator 02 using a bonding device to form a strip 001.

[0042] It should be understood that before forming the material strip 001 using the bonding device, the cell structure forming method provided in this application embodiment further includes using a transmission device to transfer the first electrode 012 and the second electrode 013 respectively. It is worth noting that this transmission device can be an electrode alignment transmission device to ensure that the first electrode 012 and / or the second electrode 013 can be aligned before the bonding device performs the bonding operation, thereby improving the accuracy of bonding the first electrode 012 and / or the second electrode 013 within the cell unit 01.

[0043] Thirdly, embodiments of this application also provide a battery cell manufacturing apparatus for implementing the battery cell structure forming method in the second aspect described above.

[0044] Figure 5 This is a schematic diagram of the structure of the battery cell production equipment provided in an embodiment of this application. Figure 5 As shown in the diagram, the battery cell manufacturing equipment provided in this application embodiment includes a lamination device 100. It is worth noting that the lamination device 100 can be any of the lamination devices 100 described in the following technical solutions. The lamination device 100 is used to implement the battery cell lamination method in the first aspect described above.

[0045] Please continue to refer to this. Figure 5 The structure shown is illustrated in one embodiment of this application. The battery cell manufacturing equipment provided in this embodiment further includes two electrode correction and transfer devices 200 disposed in the pre-processing stage of the lamination device 100. It is noteworthy that the two electrode correction and transfer devices 200 are symmetrically arranged and are respectively used to transfer and correct the two polarities of electrodes required in the material strip 001. For example, one electrode correction and transfer device 200 is used to transfer the first electrode 012, and the other electrode correction and transfer device 200 is used to transfer the second electrode 013.

[0046] Please combine Figure 1 refer to Figure 5As shown in the diagram, the battery cell production equipment provided in this embodiment of the application also includes a bonding device 300 for implementing the bonding function. This bonding device 300 bonds the first electrode 012 and the second electrode 013 to opposite sides of the separator 02 to form a battery cell unit 01. Exemplarily, the bonding device 300 includes a first roller 310 and a second roller 320, which are arranged side-by-side with only a gap in between for the battery cell unit 01 to pass through. Naturally, both the first roller 310 and the second roller 320 are connected to a driving structure (not shown in the figure). Furthermore, the first roller 310 and the second roller 320 are provided with adsorption devices to adsorb the electrodes on the electrode correction and transmission device 200.

[0047] Please continue to refer to this. Figure 5 As shown, when using the cell production equipment provided in this application embodiment, two electrode correction and transmission devices 200 respectively transmit the first electrode 012 and the second electrode 013. After the first electrode 012 and the second electrode 013 have completed correction and positioning in their respective electrode correction and transmission devices 200, the first roller 310 and the second roller 320, under the action of the adsorption device, adsorb the electrode that has completed correction and positioning, and drive them to rotate together. When the first electrode 012 and the second electrode 013 rotate between the two rollers, they are pressed onto the diaphragm 02 to form a cell unit 01. Afterwards, the material strip 001 containing a plurality of cell units 01 is transmitted by tensioning rollers and other transmission devices to the stacking device 100, where the stacking device 100 completes the stacking operation of the material strip 001 to form a cell structure.

[0048] Figure 6 for Figure 5 The schematic diagram of the electrode correction transmission device 200 shown is shown below. Figure 7 for Figure 6 Cross-sectional view at point AA. It should be understood that at least one of the two electrode correction transmission devices 200 can be configured as... Figure 6 The structure shown is illustrated. Please refer to it. Figure 6 and Figure 7 The structure shown, when the electrode correction transmission device 200 is provided, includes a transmission mechanism 210 and a correction mechanism 220. The transmission mechanism 210 has a first transmission surface B1; the correction mechanism 220 has a second transmission surface B2, and the second transmission surface B2 is used to transmit the electrode sheet transmitted from the first transmission surface B1. For example, using... Figure 6 The electrode correction transmission device 200 shown is used to transmit the first electrode 012 as an example for the following explanation.

[0049] Please continue to combine Figure 7 refer to Figure 6In the structure shown, along the traveling direction c of the first electrode 012, the first end of the second transmission surface B2 is higher than the last end of the first transmission surface B1. It should be understood that "first end" refers to the end of the first electrode 012 that the transmission mechanism 210 and the correction mechanism 220 first contact along direction c; similarly, "last end" refers to the end of the first electrode 012 that the transmission mechanism 210 and the correction mechanism 220 last contact along direction c.

[0050] It should be noted that the electrode correction transmission device 200 provided in this application embodiment sets the first end of the second transmission surface B2 higher than the tail end of the first transmission surface B1, forming a height difference between the transmission mechanism 210 and the correction mechanism 220. This allows the first electrode 012 to be transmitted from the transmission mechanism 210 to the correction mechanism 220 along direction c, so that the next first electrode 012 can be transmitted as follows: Figure 7 The electrode is inserted below the preceding first electrode 012 on the second transmission surface B2. At this time, the preceding first electrode 012 and the following first electrode 012 on the second transmission surface B2 are partially stacked, and each first electrode 012 no longer occupies the entire electrode area on the second transmission surface B2, thereby improving transmission efficiency.

[0051] It should be understood that the form of the first electrode 012 during transmission between the transmission mechanism 210 and the correction mechanism 220 is not limited to... Figure 7 The shape shown is for illustrative purposes only. Because the first electrode 012 has a certain degree of flexibility, it will undergo a certain deformation when it is transmitted between the transmission mechanism 210 and the correction mechanism 220, which is not shown here.

[0052] It is worth noting that the structures of the first transmission surface B1 in the transmission mechanism 210 and the second transmission surface B2 in the correction mechanism 220 are not limited to... Figure 7 The structure shown is as follows. The first transmission surface B1 can be a horizontal transmission surface or an inclined transmission surface with an angle to the ground. Similarly, the second transmission surface B2 can be a horizontal transmission surface or an inclined transmission surface with an angle to the ground.

[0053] In some embodiments, along the traveling direction c of the first electrode 012, the tail end of the first transmission surface B1 is not lower than the head end of the first transmission surface B1. It should be noted that when the tail end of the first transmission surface B1 is not lower than the head end of the first transmission surface B1, this structural arrangement allows the first electrode 012 to have a better deformation posture during transmission between the transmission mechanism 210 and the correction mechanism 220, so that the first electrode 012 can be inserted more smoothly below the previous first electrode 012 on the second transmission surface B2.

[0054] To facilitate the description of the structural relationship between the first transmission surface B1 and the second transmission surface B2, we will now take the first transmission surface B1 as an example. Figure 7The horizontal transmission surface shown is such that the second transmission surface B2 is as follows: Figure 7 The horizontal transmission surface shown is used as an example for illustration.

[0055] Please refer to Figure 7 In one embodiment of the structure shown, the height difference between the tail end of the first transmission surface B1 and the head end of the second transmission surface in the vertical direction is h. The range of h can be 2mm to 10mm, or even 3mm to 4mm, for example, 3mm, 3.5mm, or 4mm. It is worth noting that this height difference h will affect the transmission posture of the first electrode 012 between the transmission mechanism 210 and the correction mechanism 220.

[0056] Please refer to the following: Figure 8 In the structure shown, a gap L exists between the tail end of the first transmission surface B1 and the head end of the second transmission surface B2 in the horizontal direction. This gap L is another factor affecting the transmission posture of the first electrode 012 between the transmission mechanism 210 and the correction mechanism 220. For example, the gap L can range from 0mm to 10mm, or even from 0mm to 8mm. For instance, the value of the gap L can be set to 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or even 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, or 8mm.

[0057] It is worth noting that by adjusting the gap L and the height difference h, the degree of suspension of the first electrode 012 during transmission between the transmission mechanism 210 and the correction mechanism 220 can be changed. This degree of suspension will affect the transmission posture of the first electrode 012, thereby affecting the success rate of inserting the subsequent first electrode 012 into the previous first electrode 012.

[0058] For example, h is selected as 3mm~4mm and L as 0~8mm. It should be noted that when h and L are set within the above range, the transmission posture of the first electrode 012 is better when it is transmitted between the transmission mechanism 210 and the correction mechanism 220, and the subsequent first electrode 012 can be better inserted between the previous first electrode 012 and the second transmission surface B2.

[0059] In one embodiment, such as Figure 9 As shown, the transmission mechanism 210 includes a plurality of parallel first transmission rollers 211, which form a first transmission surface B1; the correction mechanism 220 includes a plurality of parallel second transmission rollers 221, which form a second transmission surface B2, and the extension direction of the second transmission rollers 221 is at a certain angle to the extension direction of the first transmission rollers 211.

[0060] For example, the plurality of first transmission rollers 211 in the transmission mechanism 210 are arranged sequentially in the traveling direction c of the first pole piece 012, connected to the same drive shaft, and driven by the same conveyor belt. The plurality of first transmission rollers 211 in the transmission mechanism 210 have the same horizontal height; 'same height' here includes cases where the heights are completely equal and the height difference is less than 0.1 mm. It should be understood that the top surfaces of the plurality of first transmission rollers 211 in the transmission mechanism 210 form a first transmission surface B1. Importantly, the plurality of second transmission rollers 221 in the correction mechanism 220 can be arranged in the same or similar manner as the plurality of first transmission rollers 211 in the transmission mechanism 210.

[0061] Of course, the diameters of the first transfer roller 211 and the second transfer roller 221 can be the same or different, and can be adjusted according to the actual process requirements. Optionally, the conveying speeds of the transfer mechanism 210 and the correction mechanism 220 can be the same or different, and can be adjusted according to the actual process requirements.

[0062] In another embodiment, the transmission mechanism 210 includes a plurality of parallel first transmission rollers 211, and the alignment mechanism 220 may include a horizontal transmission member and a pulling member. The horizontal transmission member is used to transport the first electrode 012. For example, the horizontal transmission member may be composed of rollers parallel to the first transmission rollers 211, or the horizontal transmission member may be a conveyor belt. The pulling member is used to align and pull the first electrode 012, and the pulling member may be, for example, a structure such as a robotic arm.

[0063] In one embodiment of this application, the example is given where the transmission mechanism 210 includes a plurality of parallel first transmission rollers 211 and the correction mechanism 220 includes a plurality of parallel second transmission rollers 221.

[0064] The correction mechanism 220 provided in this application embodiment may further include a blocking member 222, such as... Figure 10 As shown, the blocking member 222 is disposed on the side of the second transmission surface B2 away from the first transmission surface B1 and along the edge of the second transmission surface B2, for limiting at least one corner of the first electrode 012.

[0065] In one specific implementation, please refer to [link / reference]. Figure 10 The structure shown includes a first block 2221 and a second block 2222. The first block 2221 is disposed along the first edge of the second transmission surface B2, and the second block 2222 is disposed along the second edge of the second transmission surface B2. The first edge is the side edge of the second transmission surface B2 away from the first transmission surface B1, and the second edge is perpendicular to the first edge.

[0066] Specifically, taking the first stop 2221 set along the Y direction and the second stop 2222 set along the X direction as an example, the transmission process of the first electrode 012 is as follows: First, the transmission mechanism 210 transmits the first electrode 012 along the c direction to the second transmission surface B2 of the correction mechanism 220. Then, the second transmission surface B2 is used to transmit the first electrode 012 in an inclined direction (the direction inclined from the X direction to the Y direction) to the stop 222 for positioning. It should be understood that the first electrode 012 on the second transmission surface B2 includes a velocity component in the X direction and a velocity component in the Y direction. The first stop 2221 and the second stop 2222 cooperate to align at least one foot of the first electrode 012.

[0067] It is worth noting that if the included angle θ between the first transmission roller 211 and the second transmission roller 221 is too small or too large, it can easily lead to the first electrode 012 moving too fast in the X or Y direction, resulting in alignment failure or a long alignment time. In this embodiment, the included angle θ is set to a range of 30° to 60°, which can ensure the alignment efficiency of the first electrode 012 and enable the first electrode 012 to be aligned quickly.

[0068] Please continue to refer to this. Figure 10 In the structure shown, since the dimension of the first electrode 012 along the Y direction is greater than its dimension along the X direction, the dimension of the first stop 2221 along the Y direction can be set to be greater than the dimension of the second stop 2222 along the X direction. Alternatively, the first stop 2221 can be set to include at least two sub-stops, and the at least two sub-stops are spaced apart along the first edge.

[0069] In one embodiment, such as Figure 11 As shown, at least a portion of the blocking member 222 is retractable relative to the second transmission surface B2 along the vertical direction d. It should be understood that, due to the angle, Figure 11 Only the first stop 2221 is shown. It should be noted that at least a portion of the blocking member 222 in the electrode correction and transmission device 200 provided in this application embodiment can extend and retract along the direction perpendicular to the second transmission surface B2. Specifically, in conjunction with the extension and retraction operation, the blocking member 222 can shield the first electrode 012 during the correction process to prevent the first electrode 012 from flying out. Simultaneously, during subsequent alignment operations of the first electrode 012, the height m of the blocking member 222 exceeding the second transmission surface B2 can be shortened to avoid it. Therefore, the electrode correction and transmission device 200 provided in this application embodiment can improve the stability of the device for the transmission and correction of the first electrode 012, thereby improving production efficiency.

[0070] In some embodiments, the electrode correction transmission device 200 provided in this application further includes, for example, Figure 11The air-blowing mechanism 230 shown is located on the side of the second transmission surface B2 facing the first transmission surface B1, and is at least used to blow air onto the rear end of the first electrode 012 transmitted to the second transmission surface B2. This allows the subsequent first electrode 012 to be smoothly inserted between the preceding first electrode 012 and the second transmission surface B2, thereby increasing the success rate of the subsequent first electrode 012 inserting into the preceding first electrode 012, preventing problems with the transmission pattern between the first electrodes 012, and improving the transmission success rate of the device. It should be understood that "front end" refers to the part along direction c where the first electrode 012 first contacts the transmission mechanism 210 or the correction mechanism 220; conversely, "rear end" refers to the part along direction c where the first electrode 012 subsequently contacts the transmission mechanism 210 or the correction mechanism 220. Of course, the air-blowing mechanism 230 can be configured as follows: Figure 11 The air blowing mechanism 230 is located between the transmission mechanism 210 and the correction mechanism 220. Of course, the air blowing mechanism 230 can also be located below the correction mechanism 220, and the air blowing mechanism 230 blows gas through the gap between the second transmission rollers 221 for transmission.

[0071] It should be noted that the air blowing mechanism 230 may include one or more air nozzles. In one embodiment, the air blowing mechanism 230 includes a plurality of nozzles, which are spaced apart along the Y direction. It should be understood that the plurality of nozzles can be selectively opened and closed, or the air blowing mechanism 230 can be continuously opened to control the air blowing volume.

[0072] It is worth noting that, in the vertical direction, the closer the air blowing mechanism 230 is to the second transmission surface B2, the greater the force exerted by the air blowing mechanism 230 on the first electrode plate 012 under the same air output condition. Conversely, under the same force condition, the air output of the air blowing mechanism 230 can be reduced.

[0073] In some embodiments, the electrode correction transmission device 200 provided in this application further includes, for example, Figure 11 The pressing mechanism 240 shown is located above the first transmission surface B1. The pressing mechanism 240 has a pressing position and a lifting position. When the pressing mechanism 240 is in the pressing position, a pressing transmission space for the first electrode 012 is formed between the pressing mechanism 240 and the first transmission surface B1. When the pressing mechanism 240 is in the lifting position, the first electrode 012 moves out of the pressing transmission space.

[0074] It should be noted that when the electrode correction transmission device 200 with the pressing mechanism 240 installed is applied, the pressing mechanism 240 moves downward until it forms a pressing transmission space with the first transmission surface B1, and the first electrode 012 can move relative to the pressing transmission space along direction c; when the first electrode 012 reaches the preset position, the pressing mechanism 240 releases the first electrode 012; after being released, the first electrode 012 moves and is corrected on the second transmission surface B2 of the correction mechanism 220.

[0075] It should be understood that when the first electrode 012 is partially transferred from the first transmission surface B1 to the second transmission surface B2, since the first electrode 012 is partially in the holding transmission space, the first electrode 012 only moves along direction c relative to the second transmission surface B2. When the holding mechanism 240 switches from the holding position to the lifting position, the first electrode 012 moves and is corrected on the second transmission surface B2. It is worth noting that the electrode correction transmission device 200 provided in this application embodiment can control where the first electrode 012 begins to move and be corrected on the second transmission surface B2 by controlling the holding mechanism 240, so as to prevent the first electrode 012 from flying out of the correction area, improve the stability of the first electrode 012 in the transmission and correction process, and thus improve the correction success rate.

[0076] In one specific embodiment, the pressing mechanism 240 includes at least two pressing members, which are spaced apart along the Y direction, and each pressing member is rotatable about its own axis. It should be noted that the pressing mechanism 240 may include only one pressing member, two pressing members, or other numbers of pressing members, depending on the requirements. As for the form of the pressing members, they may be rubber wheels, metal wheels, or brushes; the specific configuration can be determined according to requirements and will not be elaborated further here.

[0077] In one embodiment, the position of the holding member relative to the first transmission surface B1 is adjustable along the traveling direction c of the first electrode 012, so that the electrode correction transmission device 200 provided in this application embodiment is applicable to first electrodes 012 of different sizes, thus broadening the application scenarios of the device.

[0078] Figure 12 for Figure 5 The diagram shows the structure of the stacking device 100. Please refer to... Figure 12 The stacking device 100 shown includes: a feeding mechanism 110 for conveying a material strip 001; a material platform 120 for receiving the material strip 001 discharged through the feeding port; and a pulling mechanism 131 for pulling the currently stacked discharge core unit 01 to a preset position.

[0079] It should be noted that the stacking device 100 provided in this application uses a pulling mechanism 131 to pull the current discharge cell unit 01 to be stacked in the material strip 001, so that the cell unit 01 can move to a preset position along the extension direction of the material table 120. When multiple discharge cell units 01 to be stacked are all in the preset position, the neatness of the cell structure can be improved. Therefore, the cell stacking method of this stacking device 100 can improve the stacking neatness of the cell structure, improve the stacking process accuracy, and at the same time reduce the battery safety hazards caused by poor stacking neatness.

[0080] Please continue to refer to this. Figure 12 As shown in the embodiment, the stacking device 100 provided in this application also includes a stop part 130, which is disposed at the end of the material table 120 away from the discharge port to limit the battery cell unit 01 in the material strip 001.

[0081] It should be noted that the stacking device 100 provided in this application embodiment has a stop 130 located on the end of the material table 120 away from the discharge port. In conjunction with the material pulling mechanism 131, it can limit one side end face of the cell unit 01 to realize the alignment operation of several cell units 01, thereby improving the neatness of the cell structure stacking.

[0082] The feeding mechanism 110 alternately feeds the battery cell 01 and the separator 02 to the feed plate. Figure 13 In the process of feeding onto the platform 120, to ensure that the battery cell units 01 in the strip 001 are at the same height each time they fall onto the platform 120, and to ensure that the pulling mechanism 131 can move each battery cell unit 01 towards the stop portion 130, the stacking device 100 provided in this embodiment also includes a lifting mechanism 121. The lifting mechanism 121 is connected to the platform 120 and is used to raise or lower the platform 120. To ensure that the platform 120 is easy to adjust, the platform surface of the platform 120 in this embodiment can be set to be parallel to the horizontal plane.

[0083] Specifically, when the current battery cell 01 falls into the feeding table 120 and abuts against the stop part 130 under the action of the feeding mechanism 131, if Figure 15 As shown, the lifting mechanism 121 drives the material platform 120 compared to Figure 14 The position is lowered by a set distance. For example, the set distance can be the thickness of the battery cell 01. The feeding mechanism 110 delivers the next battery cell 01 onto the feeding table 120. At this time, the pulling mechanism 131 can still act on the next battery cell 01, causing it to abut against the stop portion 130. See [link to relevant documentation]. Figure 16 As shown, the end face of the next cell unit 01 is aligned with the end face of the previous cell unit 01. This process is repeated to align the end faces of multiple cell units 01, thereby ensuring a high degree of neatness in the cell structure formed after stacking.

[0084] It is worth noting that you should continue to refer to [the relevant information]. Figure 16 As shown in the embodiment of this application, the stacking device 100 uses a stop part 130 and a material pulling mechanism 131 to shorten the allowance of the separator 02 relative to the electrode side end face, thereby improving the stacking neatness of the cell structure, improving the stacking process accuracy, reducing battery space waste, reducing separator usage to reduce costs, and reducing battery safety hazards caused by poor stacking neatness.

[0085] When setting the structure of the material pulling mechanism 131, there are multiple possible implementations of the material pulling mechanism 131, at least one of the following specific embodiments.

[0086] In one possible design of this embodiment, the pulling mechanism 131 is a friction mechanism, shown in the form of a friction element. For example, the friction element can be as follows: Figure 13 The rollers or brushes shown.

[0087] Specifically, the material pulling mechanism 131 is located above the material platform 120, and the distance between the material pulling mechanism 131 and the platform of the material platform 120 is adjustable; the circumferential surface of the material pulling mechanism 131 can contact the upper surface of the battery cell 01, and the material pulling mechanism 131 can rotate around its own axis to drive the battery cell 01 to move towards the stop part 130.

[0088] In this possible design, the friction mechanism also includes a drive element (not shown in the figure), which is drively connected to the friction element to drive the friction element to rotate about its own axis. The drive element can be, for example, a motor.

[0089] For details, please refer to [link / reference]. Figure 14 As shown in the structure, the drive unit drives the pulling mechanism 131 to rotate in the direction of arrow O. Since the circumferential surface of the pulling mechanism 131 is in contact with the upper surface of the cell unit 01, the cell unit 01 can be moved in the direction of arrow g11 by friction until the cell unit 01 abuts against the stop part 130.

[0090] It is worth noting that in actual production, due to the different specifications and thicknesses of the battery cell units 01, the distance between the pulling mechanism 131 and the upper surface of the material table 120 is adjustable to accommodate battery cell units 01 of different thicknesses. This ensures that the circumferential surface of the pulling mechanism 131 can contact the upper surface of the battery cell unit 01, thereby enabling the battery cell unit 01 to move along the direction of arrow g11 by friction until the battery cell unit 01 abuts against the stop part 130. Before production, the position of the pulling mechanism 131 can be adjusted according to the thickness of the battery cell units 01 to be stacked, and then the pulling mechanism 131 is fixed after adjustment.

[0091] In one specific implementation, such as Figure 14 As shown in the structure, in order to facilitate the adjustment of the distance between the pulling mechanism 131 and the upper surface of the material table 120, the stop part 130 is provided with multiple mounting positions. The multiple mounting positions are spaced apart along the height direction of the stop part 130, and the pulling mechanism 131 can be selectively fixedly installed in any mounting position.

[0092] In another specific implementation, such as Figure 17The structure shown allows for a connection where one end of the connecting part is connected to the pulling mechanism 131, and the other end is equipped with a counterweight 1311. The portion between the two ends of the connecting part is hinged to the stop part 130 via a hinge shaft. Notably, the distance between the pulling mechanism 131 and the material table 120 can be adjusted by changing the mass of the counterweight 1311.

[0093] It should be noted that, in order to facilitate the adjustment of the distance between the pulling mechanism 131 and the upper surface of the material table 120, the pulling mechanism 131 may not be connected to the stop part 130. For example, the stacking device 100 also includes a slide rail and a telescopic device. The slide rail is located above the material table 120, and the length direction of the slide rail is perpendicular to the plate surface of the stop part 130. One end of the telescopic device is connected to the slide rail, and the telescopic device can reciprocate along the length direction of the slide rail. The other end of the telescopic device is connected to the pulling mechanism 131 to drive the pulling mechanism 131 to rise or fall relative to the material table 120.

[0094] It should be noted that the number of material pulling mechanisms 131 can be one or multiple. When there are multiple material pulling mechanisms 131, they are arranged at intervals along the horizontal direction. For easy adjustment, multiple material pulling mechanisms 131 can be connected together. When the position of a material pulling mechanism 131 needs to be adjusted, multiple material pulling mechanisms 131 can be adjusted simultaneously, resulting in high adjustment accuracy. Moreover, only one connecting part needs to be fixed to fix multiple connecting parts, making operation convenient and quick, and improving production efficiency. Of course, when there are multiple material pulling mechanisms 131, the structures of the multiple material pulling mechanisms 131 can be the same or different.

[0095] When setting the friction mechanism, the friction mechanism may also include a telescopic device, such as a cylinder. The cylinder is connected to the pulling mechanism 131 to drive the pulling mechanism 131 to reciprocate. Since there is friction between the pulling mechanism 131 and the upper surface of the battery cell 01, the battery cell 01 is driven to move towards the stop part 130 until the battery cell 01 abuts against the stop part 130.

[0096] At this time, the material pulling mechanism 131 is not limited to rollers and brushes. The material pulling mechanism 131 can rotate around its own axis or remain stationary, as long as it can drive the battery cell unit 01 to move towards the stop part 130 by friction.

[0097] It should be noted that the material pulling mechanism 131 can also be a robotic arm. The robotic arm grabs the battery cell unit 01 and drags the battery cell unit 01 to the position where the battery cell unit 01 abuts against the stop part 130.

[0098] In another possible design of this embodiment, see Figure 18As shown, the feeding mechanism 131 is shown as an adsorption mechanism. The stop portion 130 is provided with an adsorption channel 1312, and the adsorption portion of the feeding mechanism 131 corresponds to the adsorption channel 1312 to adsorb the battery cell unit 01 to a position that abuts against the stop portion 130.

[0099] It is worth noting that the shape and size design of the adsorption channel 1312 should be carried out without affecting the adsorption performance of the material pulling mechanism 131, and to prevent the battery cell 01 from entering the adsorption channel 1312.

[0100] When configured, the material pulling mechanism 131 can be a negative pressure adsorption mechanism or a magnetic attraction mechanism. When the material pulling mechanism 131 is a negative pressure adsorption mechanism, the adsorption part is a negative pressure adsorption port.

[0101] In one embodiment of this application, see Figure 19 As shown in the structure, the stacking device 100 provided in this application embodiment also includes a limiting mechanism 132. The limiting mechanism 132 is located above the material table 120, and the minimum distance between the lower surface of the limiting mechanism 132 and the table surface of the material table 120 is adapted to the sum of the thickness of the cell unit 01 and the thickness of the separator 02.

[0102] It should be noted that the stacking device 100 provided in this embodiment can limit the battery cell unit 01 falling onto the material table 120 during the stacking process by setting a limiting mechanism 132, so as to prevent the front end of the battery cell unit 01 from tilting up.

[0103] Specifically, in use, the limiting mechanism 132 can limit the movement of each individual battery cell 01, or it can limit the movement of multiple battery cell cells 01 stacked together. For example, before the first battery cell 01 falls into the material table 120, the distance between the lower surface of the limiting mechanism 132 and the surface of the material table 120 is set to the sum of the thickness of the battery cell 01 and the thickness of the separator 02. Because the separator 02 is very thin, the first battery cell 01 can enter the space formed between the limiting mechanism 132 and the material table 120, and it will hardly tilt upwards. Alternatively, the distance between the lower surface of the limiting mechanism 132 and the surface of the material table 120 can be set to the sum of the thickness of multiple battery cell cells 01 and the thickness of multiple separators 02. In this case, multiple battery cell cells 01 are stacked sequentially in the space formed between the limiting mechanism 132 and the material table 120. In this case, the limiting mechanism 132 limits the movement of multiple battery cell cells 01, reducing the degree of tilting of the multiple battery cell cells 01.

[0104] It is worth noting that the distance between the lower surface of the limiting mechanism 132 and the material table 120 can be achieved by raising and lowering the material table 120. Alternatively, the limiting mechanism 132 can be set to move relative to the material table 120 to change the distance between the lower surface of the limiting mechanism 132 and the table surface of the material table 120.

[0105] Specifically, when the limiting mechanism 132 is fixed, the lifting mechanism 121 can move the material platform 120 to ensure that the battery cell unit 01 in the material strip 001 is at the same height each time it falls onto the material platform 120. It is worth noting that this setting eliminates the need to constantly adjust the position of the dispensing mechanism 110, which can improve production efficiency.

[0106] In another possible design, the position of the limiting mechanism 132 relative to the table 120 can be adjusted as needed to increase or decrease the distance between the lower surface of the limiting mechanism 132 and the table surface of the table 120. It should be understood that this adjustment operation needs to be coordinated with the discharge angle of the discharge mechanism 110, and interference with the discharge of the discharge mechanism 110 should be avoided when adjusting the position of the limiting mechanism 132. For example, see... Figure 19 As shown, the stop portion 130 is provided with a sliding groove, the extension direction of which is perpendicular to the horizontal reference plane, and the limiting mechanism 132 can be adjusted in position along the length direction of the sliding groove. Alternatively, the limiting mechanism 132 is detachably connected to the stop portion 130, the stop portion 130 is provided with multiple mounting positions, which are spaced apart along the height direction of the stop portion 130, and the limiting mechanism 132 is fixedly installed in the mounting positions. Alternatively, the limiting mechanism 132 is connected to a telescopic device provided above the material platform 120, which can move the limiting mechanism 132 closer to or away from the material platform 120 to adjust the position of the limiting mechanism 132. It is worth noting that in this case, the limiting mechanism 132 does not need to be connected to the stop portion 130. The telescopic device can be a pneumatic cylinder or an electric cylinder.

[0107] Based on the two designs mentioned above, it is even possible to configure both the limiting mechanism 132 and the material table 120 to be movable, which will not be elaborated here.

[0108] It is worth noting that the more battery cells 01 are stacked, the more pronounced the warping becomes. When the number of stacked cells is small, it is not necessary to limit the position of each battery cell 01. When the stacking device 100 limits the position of multiple stacked battery cells 01, a limiting mechanism 132 can be installed when limiting is required. For example, when ten battery cells 01 are stacked together, the limiting mechanism 132 can be installed in a suitable position, such as at a distance between its lower surface and the table surface of the material platform 120 equal to the sum of the thicknesses of the ten battery cells 01 and the ten separators 02, thus limiting the position of all ten battery cells 01 simultaneously.

[0109] When setting the structure of the limit mechanism 132, please continue to refer to... Figure 19As shown in the structure, the limiting mechanism 132 includes an arc-shaped segment 1321 that protrudes towards the material platform 120. Specifically, the distance between the arc-shaped segment 1321 and the surface of the material platform 120 gradually decreases from the end of the limiting mechanism 132 away from the stop portion 130 to the end of the limiting mechanism 132 closer to the stop portion 130. This arrangement facilitates the entry of the battery cell unit 01 into the space between the limiting mechanism 132 and the material platform 120.

[0110] In one embodiment, the lower surface of the limiting mechanism 132 further includes a horizontal segment 1322, which is connected to the arc segment 1321, and the horizontal segment 1322 is tangent to the lowest point of the arc segment 1321; for example, the horizontal segment 1322 and the arc segment 1321 are integrally formed.

[0111] It is worth noting that if the platform of the feed table 120 is parallel to the horizontal reference plane, then the horizontal segment 1322 is also parallel to the horizontal reference plane. The minimum distance between the horizontal segment 1322 and the platform of the feed table 120 is adapted to the sum of the thickness of the cell unit 01 and the thickness of the separator 02.

[0112] Please continue to refer to this. Figure 19 As shown in the structure, the limiting mechanism 132 may also include a rolling element 1323. The circumferential surface of the rolling element 1323 can contact the upper surface of the battery cell 01. The rolling element 1323 can rotate around its own axis to drive the battery cell 01 to move towards the stop portion 130.

[0113] It should be noted that the rolling element 1323 can serve as an auxiliary alignment component, and it can work in conjunction with the pulling mechanism 131 to perform auxiliary alignment operations. Alternatively, the rolling element 1323 can be used directly for auxiliary alignment operations without a separate pulling mechanism 131. It should be understood that when the limiting mechanism 132 and the rolling element 1323 are integrated, they can simultaneously perform both limiting and auxiliary alignment functions.

[0114] In this embodiment, the limiting mechanism 132 may further include a driving member (not shown in the figure), which is connected to the rolling member 1323 in a transmission manner to drive the rolling member 1323 to rotate around its own axis.

[0115] Specifically, see Figure 19 As shown, the driving member drives the rolling member 1323 to rotate in the direction of arrow O. Since the circumferential surface of the rolling member 1323 is in contact with the upper surface of the battery cell 01, the battery cell 01 can be moved in the direction of arrow g11 by friction until the battery cell 01 abuts against the stop part 130.

[0116] In one embodiment, the limiting mechanism 132 is provided with a receiving groove, and the rolling element 1323 is mounted in the receiving groove via a rotating shaft. The distance between the lowest end of the rolling element 1323 and the table surface of the material platform 120 is not greater than the minimum distance between the limiting mechanism 132 and the table surface of the material platform 120. This ensures that the rolling element 1323 contacts the upper surface of the battery cell 01, thereby driving the battery cell 01 to move in the direction of arrow g11 by friction until the battery cell 01 abuts against the stop portion 130.

[0117] Of course, the rolling element 1323 can be selected as a roller or a brush, and the number of rolling elements 1323 can be one or more. When there are multiple rolling elements 1323, the multiple rolling elements 1323 are spaced apart along the depth direction of the receiving groove.

[0118] Furthermore, during the stacking process of the battery cell units 01, there is a possibility that multiple battery cell units 01 may be stacked too high at the end away from the stop portion 130. When multiple battery cell units 01 are stacked too high at this point, they may block the discharge port of the discharge mechanism 110. In one embodiment, please refer to... Figure 20 The structure shown has an upper surface length of the feed platform 120 that is less than the length of the battery cell 01, so that the tail of the battery cell 01 can be bent downwards.

[0119] During use, since the length of the upper surface of the feed platform 120 is less than the length of the battery cell 01, when the front end of the battery cell 01 moves to the stop 130, the tail end of the battery cell 01 is located outside the feed platform 120. At this time, the tail end of the battery cell 01 can be bent downwards, thereby reducing the stacking height of the battery cell 01 near the discharge port of the discharge mechanism 110, ensuring the smooth conveying of subsequent battery cell 01s.

[0120] In one possible design of this embodiment, please continue to refer to... Figure 20 As shown in the structure, the end of the material platform 120 near the discharge mechanism 110 is provided with a ramp 122.

[0121] It is worth noting that if the angle between the ramp 122 and the upper surface of the feed platform 120 is too large, the degree of bending of the battery cell 01 is small, and the stacking height of the battery cell 01 near the discharge port of the discharge mechanism 110 does not decrease significantly. If the angle between the ramp 122 and the upper surface of the feed platform 120 is too small, the degree of bending of the battery cell 01 is large, which may lead to damage to the battery cell 01.

[0122] When specifically configuring the structure of the feed platform 120, the lengths of the feed platform 120 and the ramp 122 can be set to predetermined values. Specifically, the ratio between the difference between the length of the electrode in the cell unit 01 and the length of the portion of the electrode located on the upper surface of the feed platform 120, and the length of the electrode itself, can be set to 1 / 3 to 2 / 3. In other words, the lengths of the horizontal section of the feed platform 120 and the ramp 122 are configured to predetermined values ​​so that the ratio between the portion of the electrode located on the ramp and the total length of the electrode is 1 / 3 to 2 / 3. Of course, other ratios can be set according to requirements, which will not be elaborated upon here.

[0123] In one embodiment, please refer to Figure 21 The structure shown includes a feeding mechanism 110 that includes a feeding assembly, at least a portion of which can adsorb the diaphragm 02 between adjacent battery cells 01 in the feeding strip 001 fed from the feeding port.

[0124] It should be noted that when the feeding component in the feeding mechanism 110 has an adsorption function, the feeding mechanism 110 can pull the diaphragm 02 between adjacent battery cells 01 in the opposite direction when the material belt 001 passes through the feeding port, so as to improve the flatness of the diaphragm 02 between adjacent battery cells 01 in the stacked structure.

[0125] When using the stacking device 100 provided in this application embodiment, the initial position of the feeding mechanism 110 can be aligned with the center of the base 140, and the feed strip 001 and the feeding mechanism 110 are initially aligned. During the travel of the feed strip 001, the feed strip 001 may gradually shift relative to the feeding mechanism 110. Therefore, in one embodiment of this application, please refer to... Figure 21 As shown in the structure, the feeding mechanism 110 is movably mounted on the base 140 along a first direction e, which is parallel to the width direction of the material strip 001. It is worth noting that the stacking device 100 also includes a detection mechanism 150, which is fixed in position relative to the base 140 and is used to detect the offset of the material strip 001 along the first direction e.

[0126] It should be understood that the detection mechanism 150 does not necessarily need to be located on the base 140; it only needs to be fixed in position relative to the base 140. Specifically, the fixed position of the detection mechanism 150 relative to the base 140 means that the detection mechanism 150 is fixed in position relative to the base 140 during measurement. Of course, when using the feeding mechanism 110 provided in this embodiment, the location of the detection mechanism 150 can be changed according to requirements.

[0127] It should be noted that the feeding mechanism 110 provided in this embodiment measures the offset of the material strip 001 in the first direction e through the detection mechanism 150. Based on this, the feeding mechanism 110 can be controlled to move relative to the base 140 along the first direction e to correct the offset of the material strip 001. In other words, the offset of the material strip 001 can be offset by controlling the amount of movement of the feeding mechanism 110 relative to the base 140 in the first direction e.

[0128] Specifically, when the material strip 001 is conveyed within the feeding mechanism 110, there is a pre-set conveying direction, for example, as shown below. Figure 21 As shown, the material strip 001 is transported along direction f. During the transport of material strip 001 along direction f, there may be an offset in the first direction e perpendicular to it. Figure 21 Taking the dashed line M as an example, which is the preset edge line of material strip 001, as shown... Figure 21 The structure shown has an offset S between strip 001 and the dashed line M. It should be understood that strip 001 may extend beyond the edge line M, which will not be elaborated here.

[0129] Please continue to refer to this. Figure 21 As shown in the structure, because there is an offset S between the material strip 001 and the dashed line M, the material strip 001 needs to move a distance S along direction e1 to reach the preset position. It should be understood that direction e specifically includes direction e1 and the opposite direction of direction e1.

[0130] Based on this, the operator can control the feeding mechanism 110 to move a distance S along direction e1, so that the material strip 001 moves with the feeding mechanism 110 and reaches the preset position. It is worth noting that when the edge of the material strip 001 coincides with the dotted line M, the material strip 001 is aligned with the center of the base 140.

[0131] As can be seen from the above analysis, the feeding mechanism 110 in the stacking device 100 provided in this application embodiment can be flexibly adjusted along the first direction e to achieve the material belt 001 deviation correction effect, thereby improving the feeding accuracy of the device.

[0132] In one possible implementation, the position of the feeding mechanism 110 relative to the base 140 can be adjusted in real time along direction e according to the transmission state of the conveyor belt 001 to improve production efficiency; in another possible implementation, the position of the feeding mechanism 110 relative to the base 140 can also be adjusted along direction e by stopping the machine to ensure adjustment accuracy.

[0133] When the feeding mechanism 110 is mounted on the base 140, in one embodiment, the feeding mechanism 110 may be mounted on the base 140 via at least one set of slide rail assemblies. For example, as shown... Figure 22As shown, the feeding mechanism 110 is mounted on the base 140 via four sets of slide rail assemblies. It should be understood that due to the angle, Figure 22 Only two sets of slide rail assemblies are shown. Specifically, the base 140 has four slide rails 141, with each pair of slide rails 141 forming a group, arranged opposite each other along the first direction e, and each slide rail 141 in each group extending along the first direction e; the two groups of slide rails 141 are arranged opposite each other along the extension direction of the base 140. The feeding mechanism 110 has a chute structure, which cooperates with the slide rails 141 to achieve the movement effect of the feeding mechanism 110 relative to the base 140. Of course, a chute structure can also be provided on the base 140, and slide rails can be provided on the feeding mechanism 110, which can be set according to requirements, and will not be elaborated here. As for the number of slide rail assemblies, it can also be set according to requirements.

[0134] It is worth noting that the structure that enables the feeding mechanism 110 to move relative to the base 140 along the first direction e is not limited to the slide rail assembly described above, but can also be other components to achieve the effect of the feeding mechanism 110 moving relative to the base 140.

[0135] In one embodiment, the detection mechanism 150 exemplarily includes at least one vision camera. It should be understood that when the detection mechanism 150 includes multiple vision cameras, these cameras can be spaced apart along direction f to improve detection accuracy. Of course, the detection mechanism 150 is not limited to detecting the edge position of the material strip 001 to determine the offset; for example, it can also select a specific location point of a material strip 001 for detection, which will not be elaborated further here. In one embodiment, to promptly detect whether the material strip 001 has shifted relative to the discharge port and improve discharge efficiency, at least one vision camera of the detection mechanism 150 can be positioned on the feed side of the discharge port.

[0136] In one embodiment, the feeding mechanism 110 provided in this application further includes a drive mechanism disposed on the base 140. The drive mechanism is used to control the feeding mechanism 110 to move along a first direction e according to the offset S. For example, the drive mechanism includes a motor or a cylinder. When the drive mechanism is a motor, the output end of the motor is connected to a lead screw assembly, and the lead screw assembly drives the feeding mechanism 110 to move relative to the base 140 along the extension direction of the slide rail.

[0137] It should be noted that the drive mechanism can autonomously drive the feeding mechanism 110 to move based on the offset S measured by the detection mechanism 150, thereby precisely controlling the amount of movement of the feeding mechanism 110. For example, in one specific embodiment, the motor and lead screw can be controlled by a programmable controller to control the movement of the feeding mechanism 110. Of course, it can also be driven manually by an operator, which will not be elaborated upon here.

[0138] In one specific embodiment, please refer to [link / reference]. Figure 22 The structure shown exemplarily includes a support base 160 in the feeding mechanism 110. The support base 160 is movably mounted on the base 140 along a first direction e. A feeding assembly is located on the side of the support base 160 opposite to the base 140, and the feeding assembly has a feeding port. Notably, the feeding direction of the feeding port forms an angle with the horizontal plane; exemplarily, this angle ranges from -90° to 90°. It should be noted that this feeding angle facilitates the design of structures such as the subsequent feeding platform 120. It should be understood that, as... Figure 22 The downward discharge direction g1 shown is located within the horizontal plane angle range of -90° to 0°. Correspondingly, when the direction g1 is upward, it is within the range of 0° to 90°.

[0139] In one embodiment, the discharge direction of the discharge port in the discharge mechanism 110 provided in this application is adjustable. For example, the discharge direction of the discharge port can be adjusted as needed. Figure 22 The direction g1 in the middle is adjusted to Figure 22 The direction of g2 is to adapt to production needs and broaden application scenarios.

[0140] Of course, the discharge direction of the discharge port is not limited to -90° to 90°. This is just an illustrative example. The discharge direction is possible in any of the 360° directions. You just need to set the relevant structural position.

[0141] It is worth noting that there are various structures for achieving adjustable dispensing angle of the dispensing component. In one embodiment, please refer to... Figure 23 In the structure shown, the feeding assembly and the support base 160 are hinged together by a hinge shaft 161, and an adjustment assembly is also provided between the feeding assembly and the support base 160. This adjustment assembly is located on the side of the hinge shaft 161 opposite to the feeding port, to adjust the rotation angle of the feeding assembly around the hinge shaft 161. Specifically, the adjustment assembly includes a first adjustment part located on the support base 160 and a second adjustment part located on the feeding assembly.

[0142] It should be understood that the structures of the first adjustment part and the second adjustment part are possible in many ways, including at least one of the following embodiments.

[0143] In one possible implementation, the first adjustment part has an arc-shaped adjustment segment, the plane of which the arc-shaped adjustment segment is located is perpendicular to the first direction e, and the center line of the arc-shaped adjustment segment is collinear with the axis of the hinge shaft 161. The second adjustment part can move relative to the first adjustment part along the extension direction of the arc-shaped adjustment segment.

[0144] It should be noted that by adjusting the position of the second adjusting part relative to the arc-shaped adjusting section of the first adjusting part, the discharge direction of the discharge port can be changed around the hinge axis 161. For example, when the second adjusting part moves upward clockwise relative to the arc-shaped adjusting section, the discharge direction moves downward clockwise.

[0145] In one specific embodiment, the first adjusting part has an arc-shaped groove forming an arc-shaped adjusting section, and the second adjusting part has a protrusion that is embedded in the arc-shaped groove and can move along the extending direction of the arc-shaped groove. In another specific embodiment, please refer to [reference needed]. Figure 23 The structure shown has a first adjusting part with multiple holes spaced apart to form an arc-shaped adjusting section, and a second adjusting part with a protrusion or opening structure. The discharge direction can be adjusted by adjusting the holes of the first adjusting part that align with the openings or protrusions of the second adjusting part.

[0146] In another possible implementation, please refer to Figure 24 The structure shown has a first adjustment part, which is a support structure 162 provided on the support base 160, and a second adjustment part, which is a protrusion structure 111 provided on the feeding assembly. Specifically, the support structure 162 can move relative to the support base 160 in both the vertical and horizontal directions, and the direction of movement of the support structure 162 is perpendicular to the first direction e.

[0147] For example, the support structure 162 is a telescopic rod or telescopic frame, and the protruding structure 111 is a protruding block or a pin structure. Please refer to [the website / reference]. Figure 24 The structure shown has a receiving groove at the end of the support structure 162, which is used to receive the protruding structure 111, and the support structure 162 can limit the height of the protruding structure 111.

[0148] It should be noted that when adjusting the rotation angle of the feeding assembly around the hinge axis 161, the protruding structure 111 can be disengaged from the receiving groove, and then the support structure 162 can be moved simultaneously in the vertical and horizontal directions. After the support structure 162 moves into place, the protruding structure 111 falls into the receiving groove, completing the angle adjustment. An example is shown below. Figure 24 As shown, the adjustment component is composed of Figure 24 The position of the middle dashed line is moved to Figure 24 The solid line position is used to adjust the discharge direction of the discharge component.

[0149] Of course, the protruding mechanism 10 may remain in the receiving groove while the support structure 162 moves. Specifically, the protruding structure 111 can rotate relative to the feeding assembly. While the support structure 162 moves vertically or horizontally, the protruding structure 111 can move with it. It is worth noting that during the movement of the protruding structure 111 with the support structure 162, the trajectory of the protruding structure 111 follows a specific pattern. Figure 24 The central arc-shaped dashed line indicates that the center of this arc-shaped dashed line is the axis of the hinge shaft 161.

[0150] Of course, in conjunction with the structure of the first adjusting part and the second adjusting part, the feeding mechanism provided in this application embodiment may also include a locking structure disposed between the first adjusting part and the second adjusting part. This locking structure is used to limit the position of the second adjusting part relative to the first adjusting part.

[0151] It should be noted that the locking structure can lock the relative position of the second adjusting part with respect to the first adjusting part after each angle adjustment, thereby fixing the feeding direction. For an example, please refer to [link / reference needed]. Figure 23 In the structure shown, when both the first and second adjusting parts are hole structures, the locking structure 163 can be a positioning pin. In use, after the second adjusting part is aligned with the hole in the first adjusting part, the locking structure 163 can be inserted into the two holes to lock them in place.

[0152] Figure 25 This is a schematic diagram of a material feeding component within a feeding mechanism. Please refer to it. Figure 25 The illustrated structure, exemplarily, includes a feeding assembly comprising a first wheel 112 and a second wheel 113 arranged parallel to each other along their centerlines, with a feeding port formed between the first wheel 112 and the second wheel 113. It should be understood that the first wheel 112 and the second wheel 113 rotate in opposite directions. Furthermore, it is noteworthy that the surfaces of the first wheel 112 and the second wheel 113 may be in close contact before the feed belt 001 enters between the first wheel 112 and the second wheel 113. After the feed belt 001 enters the first wheel 112 and the second wheel 113, the first wheel 112 and the second wheel 113 form a feeding port.

[0153] Please refer to Figure 25 The structure shown illustrates that the second wheel 113 adsorbs the diaphragm 02 between adjacent battery cells 01 in the material strip 001 ejected from the discharge port. It is worth noting that the second wheel 113 can achieve the adsorption effect through electrostatic or vacuum functions; for example, the second wheel 113 is an electrostatic adsorption wheel or a vacuum adsorption wheel.

[0154] For ease of description, the second wheel body 113 is exemplarily disposed below the first wheel body 112, and the first wheel 1 and the second wheel body 113 are arranged vertically, with the discharge direction of the discharge port being obliquely downward in the direction g1. It should be understood that the discharge direction of the discharge port is not limited to... Figure 25 The direction shown is g1. Of course, the feeding direction can also be set to diagonally upward or any other direction as needed, which will not be elaborated further. In addition, the position of the second wheel 113 is not limited to below the material belt 001, and can also be set above the material belt 001 as needed. As for the arrangement direction of the first wheel 112 and the second wheel 113, it is not limited to... Figure 25 The vertical arrangement shown can be adjusted according to requirements, with the positions of the first wheel body 112 and the second wheel body 113 being adjusted as needed.

[0155] It is worth noting that the first wheel 112 can act as the driving wheel, and the second wheel 113 can act as the driven wheel. Of course, the driving properties of the first wheel 112 and the second wheel 113 are not limited to the example above and can be set according to requirements, which will not be elaborated further here. Figure 25 In the diagram, N1 is a vertical plane passing through the center line of the second wheel body 113, i.e., the first plane, and N2 is a horizontal plane passing through the center line of the second wheel body 113, i.e., the second plane.

[0156] For ease of description, Figure 25 The discharge direction shown is illustrated by example. Please refer to [link / reference]. Figure 25 After the previous cell unit 01 is ejected from the discharge port, the diaphragm 02 between the previous cell unit 01 and the subsequent cell unit 01 that has not been ejected from the discharge port will be adsorbed by the second wheel body 113. Simultaneously, the second wheel body 113 applies a reverse force to the diaphragm 02, causing the diaphragm 02 to move in the opposite direction. Figure 25 The state shown becomes Figure 26 The state shown.

[0157] When the battery cell 01 is ejected from the discharge port, a force is applied along direction g1, causing the battery cell 01 to move along direction g1 after exiting the discharge port. This direction g1 can be decomposed into a horizontal rightward direction g11. If the second wheel 113 does not have an adsorption function, the diaphragm 02 will move away from the second wheel 113 along direction g11 along with the previous battery cell 01. Since the second wheel 113 in the discharge mechanism provided in this embodiment has an adsorption function, when the second wheel 113 rotates in the direction of the arrow, it will apply a force in the opposite direction of g11 to the diaphragm 02, causing the diaphragm 02 to move in the opposite direction of g11. Of course, the force applied by the second wheel 113 to the diaphragm 02 can be decomposed into a force in the opposite direction of g11, and is not limited to applying force only in the opposite direction of direction g11.

[0158] Specifically, when the preceding cell unit 01 moves along direction g11, the diaphragm 02 connected to it is pulled, causing the end of the diaphragm 02 near the preceding cell unit 01 to move along direction g11, while the diaphragm 02 near the second wheel body 113 is attracted by the second wheel body 113 and moves in the opposite direction of g11. For example, the diaphragm 02 can be made of... Figure 25 The state change is as follows Figure 26In the middle state; after the next cell unit 01 is ejected from the discharge port, the diaphragm 02 connected to the front end of the next cell unit 01 moves along direction g1 after the next cell unit 01. At this time, one end of the diaphragm 02 connected to the next cell unit 01 is stretched and flattened along direction g11. When the next cell unit 01 is stacked on the previous cell unit 01, the diaphragm 02 is laid between the two adjacent cell units 01 to play a blocking role.

[0159] It should be noted that the second wheel 113 in the stacking device 100 provided in this application embodiment has an adsorption function, which can pull the diaphragm 02 between adjacent cell units 01 in the opposite direction when the material belt 001 passes through the discharge port, so as to improve the flatness of the diaphragm 02 between adjacent cell units 01 in the stacking structure.

[0160] In one embodiment of this application, the dispensing mechanism 110 further includes a guiding mechanism having a guiding channel P for accommodating the location of the diaphragm 02 after adsorption by the dispensing component. It is worth noting that the extending direction of the guiding channel P is not limited to... Figure 25 The direction shown can be set according to requirements to determine the extension direction of the guide channel P, which will not be elaborated here.

[0161] For example, to better understand the guide channel P, we will use the first wheel 112 and the second wheel 113 from the above example as examples, with the second wheel 113 having an adsorption function, as an example for illustration. Please refer to... Figure 25 As shown in the structure, the guide channel P is located on the side of the second wheel body 113 opposite to the first wheel body 112, and the guide channel P has an inlet located on the discharge side of the discharge port. It should be understood that one side of the discharge port is the feeding side, allowing the material belt 001 to enter the discharge port, and the other side of the discharge port is the discharge side. It is worth noting that since the discharge direction of the discharge port can be arbitrary along the circumference of the second wheel body 113, the guide mechanism can be positioned arbitrarily along the discharge direction and along the circumference of the second wheel body 113. Figure 25 This is for illustrative purposes only and is not limited to this.

[0162] It should be noted that when the diaphragm 02 enters the guide channel P, the guide channel P can limit the active area of ​​the diaphragm 02 and guide it, preventing the diaphragm 02 from rotating with the second wheel body 113 and entering the discharge port again from the feed side, or preventing the diaphragm 02 from falling down due to gravity and being unable to be attracted by the second wheel body 113, and moving in the opposite direction along direction g11. This can improve the success rate of flattening the diaphragm 02, reduce the probability of downtime maintenance, and improve production efficiency.

[0163] In one embodiment, for example, please refer to... Figure 25The structure shown includes a guiding mechanism comprising a first baffle 170 and a second baffle 180 disposed opposite to each other. The first baffle 170 is located on the side of the second baffle 180 away from the second wheel 113. The first baffle 170 and the second baffle 180 cooperate to form a guiding channel P. Specifically, the side of the first baffle 170 facing the second baffle 180 forms a first limiting surface, and the side of the second baffle 180 facing the first baffle 170 forms a second limiting surface.

[0164] It should be noted that the first limiting surface is used to limit the maximum downward movement distance of the diaphragm 02 in the vertical direction, to prevent the diaphragm 02 from continuously falling due to gravity and failing to move in the opposite direction with the second wheel 113; the second limiting surface is used to limit the maximum upward movement distance of the diaphragm 02 in the vertical direction, to prevent the diaphragm 02 from continuously rotating with the second wheel 113 and re-entering the discharge port from the feed side; at the same time, the first and second limiting surfaces cooperate to form a guide channel P. Obviously, the cooperation of the first and second limiting surfaces can improve the success rate of diaphragm 02 flattening, reduce the probability of downtime for maintenance, and improve production efficiency.

[0165] It is worth noting that after the previous cell unit 01 is ejected from the discharge port, the diaphragm 02 may first fall and contact the first baffle 170. The first limiting surface of the first baffle 170 limits the diaphragm 02, allowing it to enter the guide channel P from the inlet. When some diaphragms 02 are stacked in the guide channel P, some upper diaphragms 02 (diaphragms 02 close to the second wheel body 113) are adsorbed by the second wheel body 113 and move in the opposite direction of g11, so as to realize the reverse pulling of the second wheel body 113 on the diaphragm 02, thereby achieving the flattening effect of the spacer 02 of adjacent cell units 01 in the stacked structure.

[0166] In one embodiment, at least a portion of the first baffle 170 extends beyond the first plane N1 along the feed side of the inlet towards the discharge side. It should be noted that by setting at least a portion of the first baffle 170 to extend beyond the first plane N1, it can be ensured that the diaphragm 02 can contact the first baffle 170 during its descent, thereby increasing the success rate of the diaphragm 02 entering the guide channel P.

[0167] In one embodiment, to prevent the diaphragm 02 from being cut by the edge of the first baffle 170 when it contacts the first baffle 170, thus preventing the diaphragm 02 from effectively isolating adjacent cell units 01 in the subsequent cell structure, the end of the first baffle 170 extending beyond the first plane N1 can be provided with an arc-shaped surface to improve the smoothness of the end of the first baffle 170 that receives the diaphragm 02. Of course, the end of the second baffle 180 facing the second wheel body 113 can also have an arc-shaped surface, which will not be elaborated here.

[0168] Since the second limiting surface is used to limit the maximum moving distance of the diaphragm 02 in the vertical direction and upward, in order to better prevent the diaphragm 02 from re-entering the discharge port with the second wheel body 113, it can be set in one embodiment to point from the feed side of the feed port to the discharge side, and the second baffle 180 does not exceed the first plane N1.

[0169] It should be noted that the first baffle 170 and the second baffle 180 are not limited to... Figure 25 As shown in the horizontal arrangement, the first baffle 170 and / or the second baffle 180 may form an angle with the horizontal plane. Taking the second baffle 180 as an example of a horizontal arrangement, in one possible embodiment, the second limiting surface coincides with the second plane N2, that is, the axis of the second wheel body 113 passes through the plane containing the second limiting surface. In another possible embodiment, the edge of the second limiting surface facing the second wheel body 113 is located between the second plane N2 and the first limiting surface.

[0170] It is worth noting that, in the vertical direction, a distance H can be set between the edge of the second limiting surface facing the second wheel body 113 and the lowest point of the second wheel body 113, where 0 ≤ H < 2 mm. It should be understood that the smaller the value of H, the closer the second limiting surface is to the lowest point of the second wheel body 113. For example, H can be 0 mm, 0.5 mm, 1 mm, 1.5 mm, etc.

[0171] A horizontal gap I can also be provided between the edge of the second limiting surface facing the second wheel body 113 and the second wheel body 113, where I is in the range of 0mm < I < 0.5mm. When the value of I is too small, if there are foreign objects such as adhesive on the surface of the second wheel body 113, the second baffle 180 may interfere with the surface of the second wheel body 113, affecting the normal rotation of the second wheel body 113; when the value of I is too large, the second baffle 180 may not be able to effectively block the diaphragm 02, and the diaphragm 02 may pass through the gap between the second baffle 180 and the surface of the second wheel body 113. For example, I can be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, or 0.45mm.

[0172] It should be noted that the H value affects the separation point between the diaphragm 02 and the second wheel 113, thus affecting the flattening effect of the diaphragm 02 in the subsequent stacking structure. Therefore, the values ​​of H and I can be selected according to requirements. For example, the range of I is set to 0.1mm ≤ I ≤ 0.4mm, and the range of H is 0.5 ≤ H < 1.5mm. It should be understood that when the values ​​of H and I are selected within the above ranges, the flattening effect of the diaphragm 02 in the stacking structure can be improved.

[0173] It is worth noting that when the first baffle is 170, Figure 25 The horizontal setting shown is such that the second baffle 180 is as follows. Figure 25When set horizontally as shown, the distance between the first limiting surface of the first baffle 170 and the second limiting surface of the second baffle 180 in the vertical direction is D. This value of D can be set according to requirements to change the size of the guide channel P in the vertical direction, thereby limiting the activity space of the diaphragm 02.

[0174] In one embodiment of this application, the guiding mechanism further includes a third baffle 190, one end of which is connected to the first baffle 170 and the other end of which is connected to the second baffle 180, so as to close the opening on one side of the guiding channel P and prevent the diaphragm 02 from moving out from the opening on that side.

[0175] In one embodiment of this application, the feeding mechanism provided in this application further includes an auxiliary air blowing mechanism J. The auxiliary air blowing mechanism J is located on the discharge side of the feeding port and is disposed on the side of the material belt 001 opposite to the second wheel body 113, for changing the movement path of the spacer membrane 02 of the adjacent cell unit 01. Exemplarily, the auxiliary air blowing mechanism J may include one or more air blowing nozzles.

[0176] It should be noted that the feeding mechanism provided in this application embodiment changes the movement path of the diaphragm 02 by the auxiliary blowing mechanism J, so that the diaphragm 02 can be better adsorbed by the second wheel body 113, thereby improving the success rate of the second wheel body 113 adsorbing the diaphragm 02, improving the success rate of flattening the diaphragm 02, reducing the probability of downtime maintenance, and improving production efficiency.

[0177] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A method for stacking battery cells, characterized in that, include: The material strip is fed to the material table for stacking; wherein the material strip contains multiple battery cell units, adjacent battery cell units are spaced apart along the extension direction of the material strip and connected by a diaphragm, and the method of feeding the material strip to the material table includes: discharging one battery cell unit from the material strip through the discharge port of the discharge mechanism, the battery cell unit forming a battery cell unit to be stacked and discharged; at least part of the discharge mechanism adsorbs the diaphragm between the battery cell unit discharged from the discharge port and the battery cell unit to be discharged; Pull the current discharge core unit to be stacked in the material strip so that the current discharge core unit to be stacked moves to a preset position along the extension direction of the material platform; wherein, by pulling each current discharge core unit to be stacked, each cell unit in the cell structure is located at the preset position.

2. The cell stacking method according to claim 1, characterized in that, The method for moving the currently stacked discharge core unit to a preset position along the extension direction of the material platform includes: A stop is used to limit the maximum movement distance of the current discharge core unit to be stacked along the extension direction of the material table.

3. The cell stacking method according to claim 2, characterized in that, The method for pulling the current discharge core unit to be stacked in the strip includes: Pull each of the currently stacked discharge core units in the material strip.

4. The cell stacking method according to claim 3, characterized in that, The method of limiting the maximum moving distance of the current discharge core unit to be stacked along the extension direction of the material table by using a stop portion includes: The stop part is used to block the first electrode in the current discharge core unit to be stacked during the movement, so that the distance between the diaphragm and the side end face of the first electrode is about 0.

5. The cell stacking method according to claim 1, characterized in that, Before discharging a battery cell unit from the material strip at the discharge port of the discharge mechanism, the method further includes: The offset of the material strip along its width direction is detected by a testing agency; The feeding mechanism moves relative to the base along the width direction of the feed strip according to the offset, wherein the base is fixed relative to the feed table.

6. The cell stacking method according to claim 5, characterized in that, Before feeding the material strip to the material table, the method further includes: Adjust the discharge angle of the discharge mechanism relative to the base.

7. The cell stacking method according to any one of claims 1-6, characterized in that, After the method of feeding the material strip to the material table for stacking, the method further includes: A limiting mechanism is used to limit the height of the front end of the stacked battery cells on the material platform.

8. A method for forming a battery cell structure, characterized in that, This includes the cell stacking method as described in any one of claims 1-7.

9. The cell structure forming method according to claim 8, characterized in that, Before performing the cell stacking method, the method further includes: The first and second electrodes are attached to both sides of the diaphragm using a bonding device to form a material strip.

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