Method for preparing an electrode

Abstract

This application relates to a method for manufacturing a battery cell, comprising the following steps: S1: laying a separator strip in a Z-shape and setting electrode units within the separator strip to obtain a stack, the stack comprising at least one stack group, the stack group comprising multiple electrode units; S2: removing at least the bottom separator of the stack; S3: pressing the stack along the lamination direction, each stack group forming a battery cell. The battery cell manufacturing method provided by this application removes the bottom separator of the stack before pressing, preventing the bottom separator from adhering to the hot press plate during pressing, ensuring the precision of the hot press plate, and enabling the manufacture of high-quality battery cells.

Description

[0001] This application is a divisional application of the original patent application No. 2024113380500, filed on September 25, 2024, entitled "Cutting Device and Method for Preparing Battery Cells". Technical Field

[0002] This invention relates to the field of new energy technology, and in particular to a method for preparing battery cells. Background Technology

[0003] Lithium-ion batteries, with their high energy density, long lifespan, fast charging, and environmental friendliness, have become the primary energy storage devices in electric vehicles, digital products, and other fields. A lithium-ion battery cell consists of electrodes and a separator, with the separator separating the positive and negative electrodes.

[0004] In the manufacturing process of battery cells, a separator strip is laid in a Z-shape, and electrode units are set within the separator strip to form a stack. The stack includes at least one stack group, and each stack group forms a battery cell after hot pressing. In this manufacturing method, the bottom layer of the stack has a separator layer. During hot pressing, the bottom separator layer may stick to the hot press plate. Over a long period of production, this can lead to insufficient precision of the hot press plate, affecting the quality of the battery cell. Summary of the Invention

[0005] Therefore, it is necessary to provide a cell manufacturing method that can improve cell quality in response to the above problems.

[0006] A method for manufacturing a battery cell includes the following steps: S1: A diaphragm strip is laid in a Z-shape, and electrode units are set in the diaphragm strip to obtain a stack of electrodes. The stack of electrodes includes at least one stack group, and the stack group includes multiple electrode units. S2: Remove at least the bottom septum of the stacked wafers; S3: Press the stacked wafers along the stacking direction, and each stacked wafer group forms a cell.

[0007] The above-mentioned cell manufacturing method removes the bottom layer membrane of the stack before pressing the stack to prevent the bottom layer membrane from sticking to the hot press plate during pressing, thus ensuring the precision of the hot press plate and enabling the production of high-quality cells.

[0008] In one embodiment, Step S1 includes: The diaphragm strip is laid in a Z-shape, and the electrode unit and the isolation gasket are arranged in the diaphragm strip to form the stack. The isolation gasket is arranged between the lower surface of the electrode unit at the bottom of the stack and the diaphragm strip, and the isolation gasket is arranged between the upper surface of the electrode unit at the top and the diaphragm strip. Step S2 includes: Cut off the bottom diaphragm and all the side diaphragms along one end of the isolation pad located within the diaphragm strip; Step S3 includes: The stack of wafers is pressed along the stacking direction and the insulating pad is removed to obtain at least one of the battery cells.

[0009] In one embodiment, Step S2 includes: The stack of laminates is fed into the clamping gap between the first pressure plate and the second pressure plate, and the first pressure plate and the second pressure plate move closer to clamp the stack of laminates along the stacking direction. Adjust the cutting position of the stacked sheets to be opposite to the cutting mechanism in the stacking direction; The cutting mechanism cuts at least the bottom layer diaphragm of the stack at the cutting position of the stack.

[0010] In one embodiment, after the cutting mechanism cuts at least the bottom diaphragm of the stack at the cutting position of the stack, it further includes: The adsorption mechanism adsorbs and drives the bottom membrane to move, causing it to separate from the bottom isolation pad of the stacked sheet.

[0011] In one embodiment, the adsorption mechanism adsorbs and drives the bottom membrane to move, causing it to separate from the bottom insulating pad, including: The third driving member drives the first adsorption plate to approach the stack along the stacking direction, and adsorbs the bottom membrane on the side of the second pressure plate when the first adsorption plate is attached to the stack. The third driving member drives the first adsorption plate away from the stack along the stacking direction, so as to drive the bottom diaphragm located on the side of the second pressure plate away from the bottom isolation pad; The bottom diaphragm detaches from the first adsorption plate and adheres to the second pressure plate; The third driving component drives the first adsorption plate to approach the stack along the stacking direction, so that the first adsorption plate and the first pressure plate cooperate to press the stack together. The second pressure plate moves away from the stack along the lamination direction, and the bottom diaphragm moves with the second pressure plate to separate from the bottom isolation gasket; Wherein, the first adsorption plate and the second pressure plate are located on the same side of the stack in the stacking direction, and the first adsorption plate is located on one side of the second pressure plate in the width direction of the bottom membrane.

[0012] In one embodiment, between the third driving member driving the first adsorption plate away from the stack along the lamination direction to move the bottom diaphragm located on the side of the second pressure plate away from the bottom isolation pad and between the bottom diaphragm detaching from the first adsorption plate and adhering to the second pressure plate, the method further includes: The second adsorption plate adsorbs the bottom membrane, causing the bottom membrane to separate from the bottom isolation pad. Wherein, the second adsorption plate and the second pressure plate are located on the same side of the stack in the stacking direction; the second adsorption plate is located on one side of the second pressure plate in the width direction of the bottom membrane, and the second adsorption plate is disposed close to the second pressure plate relative to the first adsorption plate.

[0013] In one embodiment, the detachment of the bottom diaphragm from the first adsorption plate and its bonding with the second pressure plate includes: Air is blown onto the bottom membrane that is adsorbed by the first adsorption plate, causing the bottom membrane to separate from the first adsorption plate and adhere to the second pressure plate under the action of the airflow.

[0014] In one embodiment, after the second pressure plate moves away from the stack along the lamination direction, and the bottom diaphragm follows the movement of the second pressure plate to separate from the bottom spacer, the system further includes: The first dust removal port on the second pressure plate generates negative pressure, so that the bottom diaphragm is drawn into the first dust removal component through the first dust removal port.

[0015] In one embodiment, the cutting mechanism cuts at least the bottom diaphragm of the stack at the cutting position of the stack, comprising: The cutting mechanism cuts off the bottom diaphragm and all side diaphragms of the stack at the cutting position of the stack.

[0016] In one embodiment, after the cutting mechanism cuts the bottom diaphragm and all side diaphragms of the stack at the cutting position of the stack, it further includes: The second dust removal port on the adjustment plate generates negative pressure, causing the side diaphragm to be sucked up by the second dust removal component through the second dust removal port; The adjustment plate is used to abut against the stack of sheets to adjust the cutting position of the stack of sheets to align with the cutting mechanism in the stacking direction.

[0017] In one embodiment, feeding the stack of laminates into the clamping gap between the first pressure plate and the second pressure plate, wherein the first pressure plate and the second pressure plate press the stack of laminates together along the stacking direction, comprises: The fourth driving component drives the first pressure plate and the second pressure plate upward along the stacking direction to avoid the robotic arm; The robotic arm grips the stack of laminates from the stacking table and places the stack of laminates into the clamping gap between the first pressure plate and the second pressure plate; The fourth driving member drives the first pressure plate and the second pressure plate to move downward along the stacking direction, so that the first pressure plate abuts against the upper surface of the stack. The second driving member drives the second pressure plate to move close to the first pressure plate along the stacking direction to press the stack of sheets. Attached Figure Description

[0018] Figure 1 Front view of a cutting device provided in an embodiment of this application ( Figure 1 (Hidden robotic arm) Figure 2 for Figure 1 Axonometric view of a portion of the structure of the cutting device shown. Figure 2 (The image shows a robotic arm and a stack of wafers). Figure 3 for Figure 2 The front view of the structure shown ( Figure 3 (Hidden robotic arm and stacked components). Figure 4 Axonometric view of a stacked sheet; Figure 5 This is a cross-sectional view of the stacked sheets; Figure 6 for Figure 3 Structural diagram showing the hidden robotic arm in the middle structure; Figure 7 for Figure 4 A top view of the stacked sheets shown; Figure 8 for Figure 3 Top view of the structure shown; Figure 9 for Figure 1 Axonometric view of a partial structure of the cutting device shown; Figure 10 A structural diagram of the cutting mechanism of a cutting device provided in an embodiment of this application; Figure 11 for Figure 3 Rear view of the structure shown; Figure 12 A structural diagram of the cutting mechanism of a cutting apparatus provided in another embodiment of this application; Figure 13 for Figure 9 Front view of the structure shown; Figure 14 for Figure 9 Rear view of the structure shown; Figure 15A partial structural diagram of a cutting device provided in another embodiment of this application ( Figure 15 (The third dust removal component is shown in the image). Figure 16 for Figure 1 Rear view of the cutting device shown; Figure 17 A flowchart of a cell manufacturing method provided in an embodiment of this application; Figure 18 A flowchart of a cell manufacturing method provided in another embodiment of this application; Figure 19 for Figure 18 The diagram shows a scenario illustrating the battery cell manufacturing method.

[0019] Explanation of reference numerals in the attached figures: 100. Cutting device; 10. First clamping mechanism; 11. First pressure plate; 12. First mounting plate; 20. Second clamping mechanism; 21. Second pressure plate; 22. Second driving component; 23. Second mounting plate; 30. Adjusting mechanism; 31. Adjusting driving component; 32. Adjusting plate; 33. Third mounting plate; 40. Cutting mechanism; 41. First longitudinal driving component; 42. Cutting blade; 43. Second longitudinal driving component; 44. Transverse driving component; 50. Clamping gap; 60. Mounting frame; 70. Robotic arm; 71. Gripper; 72. Accommodation gap; 81. Third driving component; 82. First adsorption plate; 83. Second adsorption plate; 84. Adsorption hole; 90. Air blowing component; 110. First dust removal component; 1101. First dust removal port; 120. Second dust removal component; 1201. Second dust removal port; 130. Third dust removal component; 140. Fourth driving component; 150. Frame; 160. Fourth mounting plate; 200. Stacked electrode assembly; 201. Electrode unit; 202. Isolation gasket; 2021. Cutting seam; 200 a. Stacked electrode assembly; 203. Bottom diaphragm; 204. Side diaphragm; 300. Battery cell. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] See Figures 1-3 One embodiment of this application provides a cutting device 100, including a first pressing mechanism 10, a second pressing mechanism 20, an adjusting mechanism 30, and a cutting mechanism 40. The first pressing mechanism 10 and the second pressing mechanism 20 cooperate to press the stack of sheets 200, the adjusting mechanism 30 can adjust the position of the stack of sheets 200, and the cutting mechanism 40 is used to cut at least the bottom layer diaphragm 203 of the stack of sheets 200 (see...). Figure 4 and Figure 5 ).

[0027] Continue reading Figure 4 and Figure 5 The stack 200 includes at least one stack group 200a. After pressing and separation, each stack group 200a forms a corresponding battery cell 300. Optionally, a spacer 202 is provided between the top electrode unit 201 and the separator strip of the stack group 200a, and a spacer 202 is provided between the bottom electrode unit 201 and the separator strip. The spacer 202 serves to isolate the electrode unit 201 from the separator. Thus, since the bottom and top electrode units 201 of each stack group 200a cannot be combined with the separator strip under the action of the spacer 202, and will not stick to the spacer 202, removing the spacer 202 will expose the bottom and top electrode units 201, and the resulting battery cell 300 can be a digital battery cell (in some cases, the battery cells of digital products have the characteristics of light weight and thin thickness, and the outermost two sides of their electrodes are exposed). In this stack, the bottom diaphragm of the lowest layer 200a forms the bottom diaphragm 203 of the entire stack 200. During the stacking process, the diaphragm strip is laid in a Z-shape to form multiple V-grooves, with adjacent V-grooves having opposite opening directions. The spacer 202 is located within the V-grooves with openings facing the same direction. Thus, the side diaphragm 204 of the stack 200 is formed at the unopened end of the V-groove where the spacer 202 is placed. The cut slit 2021 of the spacer 202 is positioned close to the side diaphragm 204.

[0028] It should be noted that the stacking direction of the stack 200 is... Figure 1 and Figure 2The Z-direction, as mentioned below, refers to the width direction of the bottom diaphragm 203 or the width direction of the diaphragm strip. Figure 2 In the X direction, if the width direction of the diaphragm strip is defined as the width direction of the stack of 200 wafers, then... Figure 2 The Y direction in the figure represents the length direction of the stack 200. It should be understood that in some other embodiments, the length and width directions of the stack 200 can be interchanged.

[0029] It is conceivable that in some other embodiments, the separator 202 may be omitted from the stack 200. In this case, the top electrode unit 201 of each stack 200a is in direct contact with the diaphragm strip, and the bottom electrode unit 201 is in direct contact with the diaphragm strip. In this case, the side diaphragm 204 is formed at one end of the stack 200 in the length or width direction.

[0030] Further reading Figure 2 , Figure 3 and Figure 6 The first pressing mechanism 10 includes a first pressing plate 11, and the second pressing mechanism 20 includes a second pressing plate 21. A pressing gap 50 is formed between the first pressing plate 11 and the second pressing plate 21 for placing the stacked sheet 200. The first pressing plate 11 and the second pressing plate 21 can approach each other in the stacking direction of the stacked sheet 200 to press the stacked sheet 200, and the first pressing plate 11 and the second pressing plate 21 can also move away from each other in the stacking direction of the stacked sheet 200 to relax the stacked sheet 200. The adjusting mechanism 30 is used to adjust the position of the stacked sheet 200 located in the pressing gap 50, such that the cutting position of the stacked sheet 200 is aligned with the cutting mechanism 40 in the stacking direction. When the cutting position of the stacked sheet 200 is aligned with the cutting mechanism 40, and the stacked sheet 200 is pressed by the first pressing plate 11 and the second pressing plate 21, the cutting mechanism 40 cuts at least the bottom layer diaphragm 203 of the stacked sheet 200 at the cutting position of the stacked sheet 200.

[0031] In some embodiments, see Figure 4 and Figure 7 The isolation pad 202 has a cutting slit 2021 at one end within the diaphragm strip, and the cutting position of the stack 200 is directly opposite the cutting slit 2021. The adjusting mechanism 30 can adjust the alignment of the cutting slit 2021 of the isolation pad 202 in the stack 200 located in the pressing gap 50 with the cutting mechanism 40, and the cutting mechanism 40 can extend into the cutting slit 2021 to cut the bottom diaphragm 203. It is conceivable that in some other embodiments, the isolation pad 202 may omit the cutting slit 2021, in which case the cutting position of the stack 200 may be opposite to the side diaphragm 204 of the stack 200.

[0032] The cutting device 100 provided in this embodiment places the stacked wafers 200 before pressing into the pressing gap 50. The first pressing plate 11 and the second pressing plate 21 are close together to press and position the stacked wafers 200 in the stacking direction. The adjusting mechanism 30 adjusts the position of the stacked wafers 200 within the pressing gap 50, aligning the cutting position of the stacked wafers 200 with the cutting mechanism 40. The cutting mechanism 40 can then cut the bottom separator 203 of the pressed and aligned stacked wafers 200. Thus, before pressing the stacked wafers 200, the cutting device 100 can cut the bottom separator 203, preventing the bottom separator 203 from sticking to the hot press plate during pressing, ensuring the accuracy of the hot press plate, and enabling the production of high-quality battery cells 300.

[0033] Further reading Figure 1 and Figure 2 The cutting device 100 includes a mounting frame 60. The first pressing mechanism 10, the second pressing mechanism 20, the adjusting mechanism 30, and the cutting mechanism 40 are all mounted on the mounting frame 60. In this way, the cutting device 100 has a high degree of integration, a compact structure, and reduces the floor space occupied. Of course, in some other embodiments, the mounting frame 60 may be omitted from the cutting device 100, in which case the mechanisms are set independently.

[0034] In some embodiments, the first pressing mechanism 10 further includes a first driving member, which is disposed on the mounting bracket 60. The first pressure plate 11 is connected to the first driving member, and the first driving member is used to drive the first pressure plate 11 to move along the stacking direction, so that the first pressure plate 11 and the second pressure plate 21 move closer or further apart in the stacking direction. Further, see [reference needed]. Figure 2 , Figure 3 and Figure 6 The second pressing mechanism 20 also includes a second driving member 22, which is mounted on the mounting bracket 60. The second pressure plate 21 is connected to the second driving member 22. The second driving member 22 is used to drive the second pressure plate 21 to move along the stacking direction, so that the first pressure plate 11 and the second pressure plate 21 move closer or further apart in the stacking direction. The types of the first driving member and the second driving member 22 are not limited; for example, the first driving member and the second driving member 22 can be selected from motors or cylinders, etc.

[0035] In some other embodiments, the first pressing mechanism 10 may include a first driving member, and the second pressing mechanism 20 may omit the second driving member 22; or the first pressing mechanism 10 may omit the first driving member, and the second pressing mechanism 20 may include the second driving member 22. In this case, one of the first pressing plate 11 and the second pressing plate 21 serves as a fixed pressing plate fixedly mounted on the mounting frame 60, and the other serves as a movable pressing plate movably mounted on the mounting frame 60, which can also achieve the purpose of the first pressing plate 11 and the second pressing plate 21 moving closer or further apart in the stacking direction. For example, in some specific embodiments, in the stacking direction of the stack 200, the second pressing plate 21 is located at one end of the bottom diaphragm 203 of the stack 200, that is, when the first pressing plate 11 and the second pressing plate 21 cooperate to press the stack 200, the second pressing plate 21 contacts the bottom diaphragm 203 of the stack 200 (see...). Figure 2 At this point, the first pressure plate 11 can be set as a fixed pressure plate, while the second pressure plate 21 can be set as a movable pressure plate, to facilitate the subsequent unloading of the stacked wafers 200 (described below). Of course, in some other specific embodiments, it is not limited which of the first pressure plate 11 and the second pressure plate 21 is a movable pressure plate and which is a fixed pressure plate. For example, the first pressure plate 11 can also be set as a movable pressure plate and the second pressure plate 21 as a fixed pressure plate.

[0036] Optionally, please continue reading Figure 2 The first clamping mechanism 10 also includes a first mounting plate 12, which is connected to the mounting frame 60. A first pressure plate 11 is connected to the first mounting plate 12; that is, the first pressure plate 11 is indirectly connected to the mounting frame 60 through the first mounting plate 12. (Continue reading...) Figure 3 The second pressing mechanism 20 also includes a second mounting plate 23, which is connected to the second driving member 22. That is, the second pressure plate 21 is indirectly connected to the second driving member 22 through the second mounting plate 23. In this way, by indirectly connecting the first pressure plate 11 or the second pressure plate 21 to other structures through the mounting plate, the position of the first pressure plate 11 and the second pressure plate 21 can be extended, avoiding interference between the first pressure plate 11 and the second pressure plate 21 and other structures.

[0037] It is understood that in some other embodiments, the cutting device 100 may omit the first mounting plate 12 and the second mounting plate 23. In this case, the first pressure plate 11 is directly connected to the mounting bracket 60, and the second pressure plate 21 is directly connected to the second driving member 22.

[0038] See also Figure 2 and Figure 8The cutting device 100 also includes a robot arm 70, which is used to clamp the end of the stack 200 away from the side diaphragm 204 and feed the stack 200 into the clamping gap 50. The adjusting mechanism 30 can abut against the end face of the stack 200 with the side diaphragm 204 to adjust the position of the stack 200 within the clamping gap 50. Since the robot arm 70 clamps the end of the stack 200 away from the side diaphragm 204 and feeds the stack 200 into the clamping gap 50, and the adjusting mechanism 30 can abut against the end face of the stack 200 with the side diaphragm 204, the position of the stack 200 fed into the clamping gap 50 can be controlled by controlling the robot arm 70. In some embodiments, the cutting slit 2021 of the insulating pad 202 is aligned with the feeding direction of the stack 200 (…). Figure 2 (In the Y direction) it exceeds the cutting position of the cutting mechanism 40, and then under the action of the adjusting mechanism 30, the cutting seam 2021 returns to the position and aligns with the cutting position of the cutting mechanism 40, so as to avoid the situation where the cutting seam 2021 is not delivered to the position of the cutting mechanism 40.

[0039] In some embodiments, see further reference. Figure 2 and Figure 8 The robotic arm 70 includes at least two sets of grippers 71, which are spaced apart in the width direction of the bottom diaphragm 203. A receiving gap 72 exists between adjacent sets of grippers 71, allowing the first pressure plate 11 and the second pressure plate 21 to extend into the receiving gap 72 to press the stack of sheets 200. This arrangement ensures, on the one hand, that the robotic arm 70, by gripping the stack of sheets 200 with at least two sets of grippers 71, achieves a secure clamping effect; on the other hand, when the robotic arm 70 feeds the stack of sheets 200 into the pressing gap 50, the first pressure plate 11 and the second pressure plate 21 can pass through the receiving gap 72 to press the stack of sheets 200, facilitating the removal of the grippers 71 from the pressing gap 50 and preventing the grippers 71 from interfering with the operation of the adjustment mechanism 30 and the cutting mechanism 40.

[0040] Optionally, in the width direction of the bottom diaphragm 203, the first pressure plate 11 and the second pressure plate 21 include at least one pressure block, the distance between two adjacent pressure blocks is greater than the width of the gripper 71, and the width of the pressure block is less than the width of the receiving gap 72, so that the first pressure plate 11 and the second pressure plate 21 can pass through the receiving gap 72 to press the stack of sheets 200. In some specific embodiments, the first pressure plate 11 includes three pressure blocks, and the second pressure plate 21 includes one pressure block. Of course, in other specific embodiments, the number of pressure blocks included in the first pressure plate 11 and the second pressure plate 21 is not limited.

[0041] In other embodiments, the specific arrangement of the robotic arm 70, the first pressure plate 11, and the second pressure plate 21 is not limited. The robotic arm 70 only needs to be able to feed the stacked sheets 200 into the pressing gap 50, and the first pressure plate 11 and the second pressure plate 21 only need to be able to press or release the stacked sheets 200.

[0042] In some embodiments, see further reference. Figure 2 and Figure 3 The adjustment mechanism 30 includes an adjustment drive 31 and an adjustment plate 32. The adjustment drive 31 is mounted on the mounting bracket 60, and the adjustment plate 32 is connected to the adjustment drive 31. The adjustment drive 31 drives the adjustment plate 32 to move so that it abuts against one end of the stacked sheet 200 having the side diaphragm 204, adjusting the position of the stacked sheet 200. In this way, the gripper 71 of the robot arm 70 places the stacked sheet 200 into the clamping gap 50, where it is pressed by the first pressure plate 11 and the second pressure plate 21. The adjustment drive 31 then drives the adjustment plate 32 to abut against the end face of the stacked sheet 200, adjusting the position of the stacked sheet 200 in the clamping gap 50 so that the cutting position of the stacked sheet 200 is opposite to the cutting mechanism 40. Optionally, the adjustment drive 31 can be a motor or a cylinder, etc.

[0043] Further reading Figure 2 and Figure 9 The adjustment mechanism 30 also includes a third mounting plate 33, which is connected to the adjustment drive member 31. The adjustment plate 32 is connected to the third mounting plate 33, meaning that the adjustment plate 32 is indirectly connected to the adjustment drive member 31 via the third mounting plate 33. Thus, by providing the third mounting plate 33, the position of the adjustment plate 32 can be extended, avoiding interference between the adjustment plate 32 and other structures. Of course, in some other embodiments, the third mounting plate 33 may be omitted from the adjustment mechanism 30.

[0044] It should be noted that the adjustment mechanism 30 can also be set in other ways, such as setting the adjustment mechanism 30 to include a clamping member, which clamps the stack of laminates 200 and adjusts the position of the stack of laminates 200. Any setting method that can adjust the position of the stack of laminates 200 in the clamping gap 50 without interfering with other structures is acceptable.

[0045] The cutting mechanism 40 is disposed on the second mounting plate 23 and located between the second pressure plate 21 and the adjusting plate 32. At this time, the cutting mechanism 40 moves synchronously with the second pressure plate 21. Of course, in some other embodiments, the cutting mechanism 40 may not be disposed on the second mounting plate 23, such as being disposed directly on the mounting bracket 60, or disposed independently of the mounting bracket 60, which is not limited here.

[0046] In some embodiments, see Figure 10 and Figure 11The cutting mechanism 40 includes a first longitudinal drive member 41 and a cutter 42. The first longitudinal drive member 41 is mounted on the second mounting plate 23 via a fourth mounting plate 160. The cutter 42 extends along the width direction of the bottom diaphragm 203 and is connected to the first longitudinal drive member 41. The dimension of the cutter 42 in the width direction of the bottom diaphragm 203 is greater than or equal to the width of the bottom diaphragm 203. The first longitudinal drive member 41 drives the cutter 42 to move along the stacking direction to cut the bottom diaphragm 203. Thus, when the stack 200 is pressed and positioned by the first pressure plate 11 and the second pressure plate 21, and the cutting slit 2021 of the stack 200 is opposite to the cutter 42 in the stacking direction, the first longitudinal drive member 41 drives the cutter 42 to approach the bottom diaphragm 203 along the stacking direction, and finally extends into the cutting slit 2021 of the insulating pad 202 to cut the bottom diaphragm 203. After cutting, the first longitudinal drive member 41 drives the cutter 42 to retract and exit the cutting slit 2021.

[0047] It should be noted that the dimension of the cutting slit 2021 in the width direction of the bottom diaphragm 203 is greater than or equal to the width of the bottom diaphragm 203, and the dimension of the cutter 42 in the width direction of the bottom diaphragm 203 is equal to that of the cutting slit 2021. Therefore, when the cutter 42 extends into the cutting slit 2021, it can ensure that the bottom diaphragm 203 is cut off.

[0048] In other embodiments, see Figure 12 The cutting mechanism 40 includes a second longitudinal drive member 43, a transverse drive member 44, and a cutter 42. The transverse drive member 44 is mounted on the second mounting plate 23, and the second longitudinal drive member 43 is disposed on the transverse drive member 44. The cutter 42 is connected to the second longitudinal drive member 43. The second longitudinal drive member 43 drives the cutter 42 to move along the stacking direction until it passes through the bottom diaphragm 203 and extends into the cutting slit 2021. The transverse drive member 44 drives the cutter 42 to move along the width direction of the bottom diaphragm 203 to cut the bottom diaphragm 203. After cutting, the second longitudinal drive member 43 drives the cutter 42 to retract and exit the cutting slit 2021. In this embodiment, the cutter 42 has a small dimension in the width direction of the bottom diaphragm 203, making it a narrow blade.

[0049] It should be noted that there is no limitation on the types of the first longitudinal drive member 41, the second longitudinal drive member 43, and the lateral drive member 44; they can all be motors or cylinders.

[0050] In some embodiments, the cutting device 100 further includes an adsorption mechanism for adsorbing and driving the bottom diaphragm 203 to separate the bottom diaphragm 203 from the bottom insulating pad 202. In this way, under the action of the adsorption mechanism, the bottom diaphragm 203, which is easy to cut, is separated from the bottom insulating pad 202, avoiding the need for a separate station for the separation of the bottom diaphragm 203.

[0051] Continue reading Figure 3 and Figure 6 The adsorption mechanism includes a third driving member 81 and a first adsorption plate 82. The third driving member 81 is mounted on the mounting frame 60, or optionally on the first mounting plate 12. The first adsorption plate 82 is connected to the third driving member 81. The first adsorption plate 82 and the second pressure plate 21 are located on the same side of the stack 200 in the stacking direction, and the first adsorption plate 82 is located on one side of the second pressure plate 21 in the width direction of the bottom diaphragm 203. The third driving member 81 is used to drive the first adsorption plate 82 to approach the stack 200 along the stacking direction to adsorb the bottom diaphragm 203 or to move the bottom diaphragm 203 away from the stack 200 to separate it from the bottom isolation pad 202. With this configuration, after the cutting mechanism 40 cuts the bottom diaphragm 203, the third driving member 81 drives the first adsorption plate 82 to approach the stack 200 and adhere to the bottom diaphragm 203, adsorbing the bottom diaphragm 203. Then, the third driving member 81 drives the first adsorption plate 82 to move the bottom diaphragm 203 away from the stack 200, causing the bottom diaphragm 203 to separate from the bottom isolation pad 202. The third driving member 81 can be a cylinder or a motor.

[0052] It should be noted here that further reading is required. Figure 9 The first adsorption plate 82 is provided with adsorption holes 84, and the first adsorption plate 82 adsorbs the bottom membrane 203 through the adsorption holes 84.

[0053] Further reading Figure 13 and Figure 14 The adsorption mechanism includes two first adsorption plates 82, which are located on both sides of the second pressure plate 21 along the width direction of the bottom diaphragm 203. Thus, the two first adsorption plates 82 can adsorb the bottom diaphragm 203 from both sides of the second pressure plate 21, causing the bottom diaphragm 203 on both sides of the second pressure plate 21 to separate from the bottom isolation pad 202. The two first adsorption plates 82 can be driven by the same third driving member 81 or by two different third driving members 81.

[0054] It is understood that in some other embodiments, the adsorption mechanism may also include only a first adsorption plate 82, which adsorbs the bottom diaphragm 203 from the side of the bottom diaphragm 203 that is not pressed by the second pressure plate 21.

[0055] The adsorption mechanism also includes a second adsorption plate 83, which is mounted on the second mounting plate 23. The second adsorption plate 83 and the second pressure plate 21 are located on the same side of the stack 200 in the lamination direction, and the second adsorption plate 83 is located on one side of the second pressure plate 21 in the width direction of the bottom diaphragm 203. In the width direction of the bottom diaphragm 203, the second adsorption plate 83 is positioned closer to the second pressure plate 21 than the first adsorption plate 82. With this configuration, when the first adsorption plate 82 adsorbs and pulls the bottom diaphragm 203 away from the bottom isolation pad 202, the adsorption holes 84 of the second adsorption plate 83 generate negative pressure to adsorb the bottom diaphragm 203, ensuring that the bottom diaphragm 203 separates from the bottom isolation pad 202.

[0056] Furthermore, the adsorption mechanism includes two second adsorption plates 83 located on both sides of the second pressure plate 21, so as to pull the bottom diaphragm 203 from both sides of the second pressure plate 21, overcome the static electricity between the bottom diaphragm 203 and the isolation pad 202, and separate the bottom diaphragm 203 from the bottom isolation pad 202.

[0057] In some embodiments, see further reference. Figure 11 The cutting device 100 also includes an air blowing member 90, which blows air onto the bottom diaphragm 203 adsorbed by the adsorption mechanism, so that the portion of the bottom diaphragm 203 separated from the bottom isolation pad 202 is bonded to the second pressure plate 21. Specifically, the air blowing member 90 blows air onto the bottom diaphragm 203, so that the bottom diaphragm 203 detaches from the first adsorption plate 82 and is bonded to the second pressure plate 21.

[0058] Furthermore, there are two air blowing components 90, which are respectively disposed on both sides of the second pressure plate 21 to blow air onto the bottom diaphragm 203 on both sides of the second pressure plate 21, so that the bottom diaphragm 203 on both sides is in contact with the second pressure plate 21.

[0059] After the bottom diaphragms 203 on both sides of the second pressure plate 21 are attached to the second pressure plate 21, the third driving member 81 drives the first adsorption plate 82 to move closer to the stack 200 and cooperate with the first pressure plate 11 to press the stack 200 tightly. The second driving member 22 drives the second pressure plate 21 away from the stack 200. Since the bottom diaphragms 203 are attached to the second pressure plate 21, they move with the second pressure plate 21 and completely separate from the stack 200. The robot arm 70 returns to hold the stack 200 and clamps the stack 200 with the bottom diaphragms 203 separated out of the pressing gap 50.

[0060] In some embodiments, see further reference. Figure 9The cutting device 100 also includes a first dust removal component 110, which is used to adsorb the cut bottom layer diaphragm 203. Optionally, the first dust removal component 110 is connected to the second mounting plate 23, and the first dust removal port 1101 of the first dust removal component 110 is located on the pressing surface of the second pressure plate 21 for pressing the bottom layer diaphragm 203. When the bottom layer diaphragm 203 separates from the bottom layer isolation pad 202, the first dust removal component 110 is activated, and the bottom layer diaphragm 203 and other dust particles are sucked into the dust collection box through the first dust removal port 1101.

[0061] It should be understood that in some other embodiments, the position of the first dust removal port 1101 of the first dust removal component 110 is not limited. For example, it can also be set on the second mounting plate 23, as long as it can achieve the effect of removing the bottom diaphragm 203.

[0062] In some embodiments, the cutting mechanism 40 is also used to cut all the side separators 204 of the stack 200. That is, after the cutting position of the stack 200 is aligned with the cutting mechanism 40, the cutting mechanism 40 can not only cut the bottom separator 203, but also cut all the side separators 204 of the stack 200. In this way, there is no need to set up a separate cutting mechanism to cut the side separators 204, simplifying the manufacturing process of the cell 300.

[0063] In some embodiments, when the cutting mechanism 40 cuts the diaphragm, the cutter 42 extends into the cutting slit 2021 of the isolation pad 202 of the stack 200, thereby cutting off all the side diaphragms 204.

[0064] See Figure 13 and Figure 15 The cutting device 100 further includes a second dust collector 120, which is used to collect the cut side diaphragm 204. Optionally, the second dust collector 120 is connected to the adjusting plate 32, and has a second dust collection port 1201, which is located on the contact surface of the adjusting plate 32 for contacting the stack 200. Thus, when the side diaphragm 204 is cut, the second dust collector 120 activates, drawing the side diaphragm 204 and other dust particles into the dust collection box through the second dust collection port 1201.

[0065] Furthermore, the cutting device 100 also includes a third dust removal component 130, with its third dust removal port spaced apart from the second dust removal port 1201. The third dust removal component 130 draws in the side diaphragm 204 through the third dust removal port. The second dust removal component 120 and the third dust removal component 130 enhance the absorption effect of diaphragm waste and other dust particles.

[0066] In some embodiments, see Figure 1 and Figure 16The cutting device 100 also includes a fourth drive member 140, and the mounting frame 60 is connected to the fourth drive member 140. The fourth drive member 140 drives the mounting frame 60 to move along the stacking direction, thereby causing the structures mounted on the mounting frame 60 to move along the stacking direction. In this way, when the robot arm 70 picks up the stacked stack 200 from the stacking table, the mounting frame 60 and the structures mounted on the mounting frame 60 are prevented from affecting the movement of the robot arm 70. Optionally, the fourth drive member 140 is a motor or a cylinder, etc.

[0067] Furthermore, the cutting device 100 also includes a frame 150, on which the fourth drive member 140 is mounted. The cutting device 100 also includes a guide mechanism, through which the mounting frame 60 is connected to the frame 150. When the fourth drive member 140 drives the mounting frame 60 to move along the stacking direction, the guide mechanism guides the mounting frame 60 to prevent it from deviating from its intended path.

[0068] The cutting device 100 provided in this embodiment can cut and separate the bottom diaphragm 203 and the side diaphragm 204 using the following workflow: Feeding and stacking of 200 pieces for clamping and positioning: The fourth drive unit 140 drives the mounting frame 60, causing its components to move upwards to avoid the robot arm 70, which then grips the stacked stack 200 from the stacking table. The robot arm 70 feeds the stacked stack 200 into the clamping gap 50 between the first pressure plate 11 and the second pressure plate 21. The fourth drive unit 140 drives the mounting frame 60 to move, causing the first pressure plate 11 to contact the upper surface of the stacked stack 200. The second drive unit 22 drives the second pressure plate 21 to move closer to the first pressure plate 11, thus clamping the stacked stack 200. The gripper 71 of the robot arm 70 releases the stacked stack 200 and exits from between the first pressure plate 11 and the second pressure plate 21. The adjustment drive unit 31 drives the adjustment plate 32 to contact the end of the stacked stack 200 with the side diaphragm 204, adjusting the cutting position of the stacked stack 200 to be opposite to the cutting mechanism 40.

[0069] Cut the diaphragm: The cutter 42 of the cutting mechanism 40 extends into the cutting slit 2021 of the isolation pad 202 and cuts off the bottom diaphragm 203 and all the side diaphragms 204.

[0070] Side diaphragm 204 suction: When the second dust collector 120 is opened, the airflow size is switched, and the side diaphragm 204 and the dust generated by cutting enter the second dust collector 120 through the second dust collector port 1201 and are sucked out.

[0071] Bottom membrane 203 peeling: The third driving component 81 drives the first adsorption plate 82 upwards towards and into contact with the stack 200. The adsorption holes 84 of the two first adsorption plates 82 open under vacuum, adsorbing the bottom membranes 203 on both sides of the second pressure plate 21. The third driving component 81 then drives the first adsorption plates 82 away from the stack 200, causing the bottom membranes 203 on both sides to separate from the bottom isolation pads 202. The two second adsorption plates 83 open under vacuum, providing downward adsorption force to ensure the separation of the bottom membranes 203 from the bottom isolation pads 202. The two air blowing components 90 blow air, causing the bottom membranes 203 to detach from the first adsorption plates 82. Under the action of the airflow, the bottom membranes 203 on both sides adhere to the second pressure plate 21, and the air blowing components 90 stop blowing air.

[0072] Material preparation: The third driving member 81 drives the first adsorption plate 82 to approach the stack 200 again and adhere to it. At this time, the first adsorption plate 82 cooperates with the first pressure plate 11 to press the stack 200. The second driving member 22 drives the second pressure plate 21 away from the stack 200, causing the second pressure plate 21 to release its grip on the stack 200. The gripper 71 of the robot arm 70 returns to the part of the stack 200 where the bottom diaphragm 203 has been peeled off. The third driving member 81 drives the first adsorption plate 82 away from the stack 200, causing the first adsorption plate 82 to release its grip on the stack 200. The robot arm 70 picks up the stack 200 with the side diaphragm 204 and the bottom diaphragm 203 removed.

[0073] Bottom membrane 203 absorption: When the first dust collector 110 is activated, the airflow switches between large and small. The bottom diaphragm 203 and the dust generated during cutting enter the first dust collector 110 through the first dust collection port 1101 on the second pressure plate 21 and are sucked away. Furthermore, the first pressure plate 11 can also be provided with air blowing holes. When the first dust collection port 1101 generates negative pressure, the air blowing holes on the first pressure plate 11 blow air onto the bottom diaphragm 203, ensuring that the bottom diaphragm 203 is smoothly sucked away by the first dust collector 110.

[0074] See Figure 17 Another embodiment of this application also provides a method for manufacturing a battery cell, including the following steps: S1: The diaphragm strip is laid in a Z-shape, and electrode units 201 are set in the diaphragm strip to obtain a stack 200. The stack 200 includes at least one stack group 200a, and the stack group 200a includes multiple electrode units 201. The electrode unit 201 can be a single electrode, such as a positive electrode or a negative electrode. Alternatively, the electrode unit 201 can also be a composite electrode unit 201, which includes a positive electrode, a negative electrode, and a separator sheet sandwiched between the positive electrode and the negative electrode.

[0075] Each stack 200a includes multiple electrode units 201, and adjacent electrode units 201 are separated by zigzag-laid diaphragm strips.

[0076] S2: Remove at least the bottom septum 203 of the stacked membranes 200; In some embodiments, the bottom diaphragm 203 of the stack 200 is removed. In other embodiments, both the bottom diaphragm 203 and the side diaphragms 204 of the stack 200 are removed.

[0077] S3: Press the stacked wafers 200 along the stacking direction, and each stacked wafer group 200a forms a cell 300.

[0078] The purpose of pressing is along the stacking direction, that is... Figure 19 The layers of the lamination group 200a in the stack 200 are pressed and bonded together in the vertical direction to obtain a compact battery cell 300. Optionally, the stack 200 is pressed using hot pressing. During hot pressing, the stack 200 is heated to ensure better bonding between the layers of the lamination group 200a, thereby improving the reliability of the battery cell 300. When the stack 200 is pressed, if the stack 200 includes only one lamination group 200a, that lamination group 200a can form one battery cell 300. If the stack 200 includes multiple lamination groups 200a, the individual lamination groups 200a can be separated to form multiple battery cells 300.

[0079] In the above-described method for preparing battery cells, the bottom layer separator 203 of the stack 200 has been removed before pressing the stack 200. When pressing the stack 200, the bottom layer separator 203 will not stick to the hot press plate, thus ensuring the precision of the hot press plate and enabling the preparation of high-quality battery cells 300.

[0080] In some embodiments, see Figure 18 and Figure 19 S1 includes: The diaphragm strip is laid in a Z-shape, and electrode units 201 and isolation pads 202 are set in the diaphragm strip to form a stack 200. The lower surface of the electrode unit 201 at the bottom of the stack 200a is provided with an isolation pad 202 between it and the diaphragm strip, and the upper surface of the electrode unit 201 at the top is provided with an isolation pad 202 between it and the diaphragm strip.

[0081] The electrode units 201 within the stack 200a are generally stacked vertically. The bottom electrode unit 201 refers to the first electrode unit 201 counted from the bottom up, and the top electrode unit 201 refers to the last electrode unit 201 counted from the bottom up. The surfaces of the first and last electrode units 201 facing away from each other refer to the lower and upper surfaces, respectively. That is, a spacer 202 is provided between the lower surface of the first electrode unit 201 counted from the bottom up and the diaphragm strip in each stack 200a, and a spacer 202 is also provided between the upper surface of the last electrode unit 201 and the diaphragm strip. The surface of the spacer 202 is generally treated with a coating or other surface treatment to prevent adhesion to the diaphragm strip and the electrode units 201.

[0082] In one embodiment, two adjacent lamination groups 200a share a single insulating spacer 202. That is, the insulating spacer 202 is disposed on the last electrode unit 201 of one lamination group 200a, while the first electrode unit 201 of the next lamination group 200a is disposed on the surface of the insulating spacer 202. This reduces the number of insulating spacers 202 used, thereby lowering costs and simplifying the process.

[0083] In other embodiments, when the last electrode unit 201 of the stacked assembly 200a is provided with an isolation pad 202, a diaphragm strip can be covered on the surface of the isolation pad 202, another isolation pad 202 can be placed on the diaphragm strip, and finally the first electrode unit 201 of the next stacked assembly 200a can be placed on the isolation pad 202.

[0084] Step S2 includes: Cut off the bottom diaphragm 203 and all the side diaphragms 204 along one end of the isolation pad 202 located in the diaphragm material strip.

[0085] It should be noted that the Z-shaped diaphragm strip has multiple V-grooves, and the separator gasket 202 and electrode unit 201 are placed in the V-grooves of the separator strip. The end of the separator gasket 202 located in the separator strip is the end of the separator gasket 202 near the bottom of the V-groove. When the bottom separator 203 and all the side separators 204 of the stack 200 are cut along the end of the separator gasket 202 located in the separator strip, and the bottom separator 203 and the side separators 204 are separated from the stack 200, the bottom separator 203 will not stick to the hot press plate during the subsequent pressing of the stack 200, ensuring the accuracy of the hot press plate and enabling the production of high-quality battery cells 300.

[0086] S3: Press the stack 200 along the stacking direction and remove the isolation pad 202 to obtain at least one cell 300.

[0087] After pressing the stack 200 and removing the isolation pad 202, the battery cell 300 can be obtained. If the stack 200 includes multiple stack groups 200a, the multiple battery cells 300 can be separated after pressing the stack 200 and removing the isolation pad 202. Since the electrode units 201 at the bottom and top of each stack 200a are separated from the separator strip by the isolation pads 202, the electrode units 201 at the bottom and top of the stack 200a will not be combined with the separator strip. After the isolation pads 202 are removed, the electrode units 201 with exposed bottom and top will be prepared, and the resulting cell 300 can be a digital cell 300. Compared with the existing technology (which stacks the cells in a conventional way to obtain a stack 200 with separators on both sides of the outermost layer, and then attaches electrode sheets to both sides of the stack 200 after pressing), the preparation of digital cell 300 does not require the preparation of a stack 200 and the subsequent electrode sheet bonding, and the preparation process is simple.

[0088] Furthermore, after the separator 202 is removed, the multiple stacked wafer groups 200a separate from each other, and each stacked wafer group 200a forms a battery cell 300, thus obtaining multiple battery cells 300. It is evident that the above battery cell preparation method can produce multiple digital battery cells 300 at once, eliminating the need to cut the separator strip once for each battery cell 300. This reduces the average time required to prepare each battery cell 300, thereby improving production efficiency.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for manufacturing a battery cell, characterized in that, Including the following steps: S1: The diaphragm strip is laid in a Z-shape, and electrode units (201) are set in the diaphragm strip to obtain a stack (200). The stack (200) includes at least one stack group (200a), and the stack group (200a) includes a plurality of the electrode units (201). S2: Remove at least the bottom septum (203) of the stacked sheets (200). S3: The stack (200) is pressed along the stacking direction, and each stack (200a) forms a cell (300).

2. The cell manufacturing method according to claim 1, characterized in that, Step S1 includes: The diaphragm strip is laid in a Z-shape, and the electrode unit (201) and the isolation pad (202) are arranged in the diaphragm strip to obtain the stack (200). The isolation pad (202) is arranged between the lower surface of the electrode unit (201) at the bottom of the stack (200a) and the diaphragm strip, and the isolation pad (202) is arranged between the upper surface of the electrode unit (201) at the top and the diaphragm strip. Step S2 includes: Cut off the bottom diaphragm (203) and all the side diaphragms (204) along one end of the isolation pad (202) located in the diaphragm strip. Step S3 includes: The stack (200) is pressed along the stacking direction and the insulating pad (202) is removed to obtain at least one of the battery cells (300).

3. The cell manufacturing method according to claim 1 or 2, characterized in that, Step S2 includes: The stack (200) is fed into the clamping gap (50) between the first pressure plate (11) and the second pressure plate (21), and the first pressure plate (11) and the second pressure plate (21) press the stack (200) together along the stacking direction. Adjust the cutting position of the stack (200) to be opposite to the cutting mechanism (40) in the stacking direction; The cutting mechanism (40) cuts at least the bottom layer diaphragm (203) of the stack (200) at the cutting position of the stack (200).

4. The cell manufacturing method according to claim 3, characterized in that, After the cutting mechanism (40) cuts at least the bottom diaphragm (203) of the stack (200) at the cutting position of the stack (200), it further includes: The adsorption mechanism adsorbs and drives the bottom membrane (203) to move, causing it to separate from the bottom isolation pad (202) of the stack (200).

5. The cell manufacturing method according to claim 4, characterized in that, The adsorption mechanism adsorbs and drives the bottom membrane (203) to move, causing it to separate from the bottom isolation pad (202), including: The third driving member (81) drives the first adsorption plate (82) to approach the stack (200) along the stacking direction, and adsorbs the bottom layer membrane (203) on the side of the second pressure plate (21) when the first adsorption plate (82) is attached to the stack (200). The third driving member (81) drives the first adsorption plate (82) away from the stack (200) along the stacking direction, so as to drive the bottom diaphragm (203) located on the side of the second pressure plate (21) away from the bottom isolation pad (202). The bottom diaphragm (203) detaches from the first adsorption plate (82) and adheres to the second pressure plate (21); The third driving member (81) drives the first adsorption plate (82) to approach the stack of sheets (200) along the stacking direction, so that the first adsorption plate (82) and the first pressure plate (11) cooperate to press the stack of sheets (200). The second pressure plate (21) moves away from the stack (200) along the stacking direction, and the bottom diaphragm (203) moves with the second pressure plate (21) to separate from the bottom isolation pad (202); Wherein, the first adsorption plate (82) and the second pressure plate (21) are located on the same side of the stack (200) in the stacking direction, and the first adsorption plate (82) is located on one side of the second pressure plate (21) in the width direction of the bottom membrane (203).

6. The cell manufacturing method according to claim 5, characterized in that, The third driving member (81) drives the first adsorption plate (82) away from the stack (200) along the stacking direction, so as to drive the bottom diaphragm (203) located on the side of the second pressure plate (21) away from the bottom isolation pad (202) and the bottom diaphragm (203) detaches from the first adsorption plate (82) and adheres to the second pressure plate (21). The process also includes: The second adsorption plate (83) adsorbs the bottom membrane (203), thereby separating the bottom membrane (203) from the bottom isolation pad (202); Wherein, the second adsorption plate (83) and the second pressure plate (21) are located on the same side of the stack (200) in the stacking direction; the second adsorption plate (83) is located on one side of the second pressure plate (21) in the width direction of the bottom membrane (203), and the second adsorption plate (83) is disposed close to the second pressure plate (21) relative to the first adsorption plate (82).

7. The cell manufacturing method according to claim 5, characterized in that, The bottom diaphragm (203) detaches from the first adsorption plate (82) and is attached to the second pressure plate (21) including: Air is blown onto the bottom membrane (203) adsorbed by the first adsorption plate (82), causing the bottom membrane (203) to separate from the first adsorption plate (82) and adhere to the second pressure plate (21) under the action of the airflow.

8. The cell manufacturing method according to claim 5, characterized in that, After the second pressure plate (21) moves away from the stack (200) along the stacking direction, and the bottom diaphragm (203) moves with the second pressure plate (21) to separate from the bottom isolation pad (202), the following is also included: The first dust removal port (1101) on the second pressure plate (21) generates a negative pressure so that the bottom diaphragm (203) is drawn into the first dust removal component (110) through the first dust removal port (1101).

9. The cell manufacturing method according to claim 3, characterized in that, The cutting mechanism (40) cuts at least the bottom layer diaphragm (203) of the stack (200) at the cutting position of the stack (200) as follows: The cutting mechanism (40) cuts the bottom diaphragm (203) and all the side diaphragms (204) of the stack (200) at the cutting position of the stack (200).

10. The cell manufacturing method according to claim 9, characterized in that, After the cutting mechanism (40) cuts the bottom diaphragm (203) and all the side diaphragms (204) of the stack (200) at the cutting position, the cutting mechanism (40) further includes: The second dust removal port (1201) on the adjustment plate (32) generates negative pressure, so that the side diaphragm (204) is sucked in by the second dust removal component (120) through the second dust removal port (1201); The adjustment plate (32) is used to abut against the stack (200) to adjust the cutting position of the stack (200) to be aligned with the cutting mechanism (40) in the stacking direction.

11. The cell manufacturing method according to claim 3, characterized in that, The step of feeding the stack (200) into the clamping gap (50) between the first pressure plate (11) and the second pressure plate (21), wherein the first pressure plate (11) and the second pressure plate (21) move closer to and clamp the stack (200) along the stacking direction, includes: The fourth driving member (140) drives the first pressure plate (11) and the second pressure plate (21) to move upward along the stacking direction to avoid the robot arm (70); The robotic arm grips the stack (200) from the stacking table and places the stack (200) into the clamping gap (50) between the first pressure plate (11) and the second pressure plate (21); The fourth driving member (140) drives the first pressure plate (11) and the second pressure plate (21) to move downward along the stacking direction, so that the first pressure plate (11) abuts against the upper surface of the stack (200); The second driving member (22) drives the second pressure plate (21) to move close to the first pressure plate (11) along the stacking direction to press the stack (200).

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