An electrode tab processing device for lithium-ion power batteries and a method thereof

Abstract

The application relates to the technical field of battery pole piece processing, and discloses a pole piece processing device and method for a lithium ion power battery. The pole piece processing device comprises a pole piece delivery assembly; the pole piece delivery assembly comprises a support table, a cylinder four and a cylinder five; two slide tables are horizontally slidably arranged on the two sides of the end of the support table away from a stacking table; the middle part of the end of the support table away from the stacking table is fixedly connected with the cylinder four, the output end of the cylinder four penetrates through the support table and is fixedly connected with an adsorption plate; the end of the two slide tables away from the stacking table is fixedly connected with the cylinder five; the output ends of the two cylinders five penetrate through the support table and are fixedly connected with branch pipes, and the ends of the two branch pipes away from the cylinder five are fixedly connected with push membrane pipes; the speed of laying the diaphragm is increased, the stacking interval of the pole piece is shortened, the influence of the pole piece "dragging" caused by the increase of the stacking layer number of the pole piece is reduced or even avoided, and the stacking precision and the stacking efficiency of the pole piece are ensured.

Description

Technical Field

[0001] This invention relates to the field of battery electrode processing technology, specifically to an electrode processing apparatus and method for lithium-ion power batteries. Background Technology

[0002] In current electrode stacking processes, the separator is laid along a "Z"-shaped trajectory on the stacking table and alternately stacked with the positive and negative electrodes. To ensure the stability of the separator during laying and to avoid "slapping" or "dragging" the electrodes during the laying process, the separator is usually laid on the electrodes at a relatively slow speed, almost like a "soft landing." Furthermore, the electrodes to be stacked must be laid flat on the previous electrode before they can be stacked on the separator by a robotic arm. This severely limits the electrode stacking speed to the separator laying speed, resulting in low electrode stacking efficiency, which in turn limits the battery forming efficiency.

[0003] On the other hand, for long-sized batteries, the increased electrode length causes the separator to collapse in the middle region along the electrode length, while remaining tense at both ends. This uneven tension distribution enhances the pulling effect of the separator on the electrode, making the electrode prone to deflection or misalignment during the stacking process. This phenomenon further increases the requirements for the precision and synchronization of separator laying, making it difficult for traditional stacking processes to simultaneously achieve high efficiency and high yield. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an electrode processing apparatus and method for lithium-ion power batteries, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electrode processing apparatus for a lithium-ion power battery, comprising a processing table, an unwinding assembly for unwinding a separator, and a stacking table for stacking electrodes and separators. A moving platform is provided on the processing table below the stacking table, and the moving platform is used to provide horizontal and vertical movement of the stacking table. An electrode delivery assembly is installed on each of the two opposite sides of the stacking table in the horizontal direction on the moving platform. The two electrode delivery assemblies are respectively used to deliver positive electrode sheets and negative electrode sheets, and operate alternately to realize the alternating stacking of positive and negative electrode sheets and separators on the stacking table. The electrode delivery assembly includes a support platform, cylinder four, and cylinder five. A slide is horizontally slidably mounted on each side of the support platform at the end furthest from the stacking platform. A drive assembly for opening and closing the two slides is located between them. Cylinder four is fixedly connected to the middle of the end of the support platform furthest from the stacking platform. The output end of cylinder four passes through the support platform and is fixedly connected to an adsorption plate. The adsorption plate adsorbs the electrode and, when the electrode moves above the stacking position, releases the adsorption and exhausts air downwards, pressing the electrode onto the diaphragm. Cylinder five is fixedly connected to the ends of the two slides furthest from the stacking platform. The output ends of the two cylinders five pass through the support platform and are fixedly connected to branch pipes. A film-pushing tube is fixedly connected to the end of each branch pipe furthest from cylinder five. The film-pushing tubes are horizontally arranged and perpendicular to the branch pipes. The opposing ends of the two film-pushing tubes can coaxially abut against each other.

[0006] Preferably, the adsorption plate is located between the two branch pipes and the two push-film pipes, and the maximum distance between the two branch pipes is less than the width of the diaphragm.

[0007] Preferably, the side of the branch pipe near cylinder five is connected to an air pipe connector to connect to a negative pressure source. The branch pipe and the push film pipe are interconnected, and both the branch pipe and the push film pipe are provided with negative pressure suction holes on the side facing the adsorption plate.

[0008] Preferably, it also includes a roller assembly for guiding the conveying of the diaphragm; the roller assembly consists of guide roller one, guide roller two, film feeding roller one, film feeding roller two, and guide roller three arranged sequentially along the diaphragm's moving trajectory; Among them, guide roller 1, guide roller 2 and guide roller 3 are all rotatably mounted on the front end of the mounting platform through bearings; film feeding roller 1 and film feeding roller 2 are both rotatably mounted on a swing plate through bearings; the swing plate is fixed on the output end of motor 2 installed at the rear end of the mounting platform; two motors 3 are also installed on the swing plate, which are used to drive film feeding roller 1 and film feeding roller 2 to rotate respectively.

[0009] Preferably, it also includes a pair of film feeding assemblies; both film feeding assemblies are mounted on the moving end of the linear motor module one installed at the front end of the mounting platform.

[0010] Preferably, the film feeding assembly includes a mounting frame; film feeding roller four and film feeding roller three are rotatably mounted on the upper and lower sides of the end facing the diaphragm, respectively; a motor five is installed inside the mounting frame, and the output end of the motor five is connected to film feeding roller four and film feeding roller three through two transmission components, respectively.

[0011] Preferably, the linear motor module one is also equipped with a motor four for driving the mounting frame to swing, so that the film feeding roller four and the film feeding roller three alternately contact the diaphragm.

[0012] A method for processing electrode sheets for lithium-ion power batteries includes the following steps: Step S1: Position the adsorption plate, the two branch tubes, and the two push film tubes above their respective support platforms, and ensure that the two push film tubes are in contact with each other. Step S2: The adsorption plate on one side adsorbs the electrode sheet from the upper end of the support platform near the stacking platform; then, cylinders four and five move synchronously to move the electrode sheet above the stacking position, and both push-film tubes contact the diaphragm; then, the adsorption plate releases and presses down on the electrode sheet; completing one stacking of the electrode sheet. Step S3: The adsorption plate on the other side cooperates with the pusher tube on the other side to push the diaphragm around the pusher tube from the previous stacking until the adsorption plate for this stacking moves above the stacking position. Then, the adsorption plate from the previous stacking is reset. After that, the adsorption plate from this stacking is released and presses down on the electrode. Then, the pusher tubes from the previous stacking move away from each other, causing the branch tube and pusher tube to detach from the diaphragm and reset. This completes the electrode stacking operation for this time. Step S4: Repeat step 3 until all electrode stacking operations are completed.

[0013] Compared with the prior art, the present invention provides an electrode processing apparatus and method for lithium-ion power batteries, which has the following beneficial effects: 1. By using the set of rollers and the swing of the swing plate, the angle between the line connecting film feeding roller 1 and film feeding roller 2 and the horizontal plane can be adjusted. This allows the tension of the diaphragm to be adjusted during the rotation and conveying of the diaphragm by film feeding roller 1 and film feeding roller 2, and the reserved length of the diaphragm between guide roller 2 and guide roller 3 can be controlled. In the diaphragm laying stage, the laying speed of the diaphragm is not limited by the unwinding speed of the diaphragm. This allows the laying speed of the diaphragm to be increased without increasing the unwinding speed of the diaphragm, thereby shortening the electrode stacking interval and improving the electrode stacking efficiency.

[0014] 2. By using the film feeding assembly, the film feeding rollers four and three on both sides of the diaphragm alternately contact the diaphragm, controlling the angle between the diaphragm and the electrode, reducing or even avoiding the "dragging" effect of the electrode as the number of electrode stacking layers increases, and ensuring the stacking accuracy and stacking efficiency of the electrode.

[0015] 3. The electrode delivery assembly uses an adsorption plate to adsorb the electrode. After the electrode moves above the stacking position, the adsorption is released and the air is vented downwards, thereby pressing the electrode onto the separator. The two branch tubes and two push film tubes from the previous stacking and the two push film tubes from this stacking work together to support the separator at the edge of the stacking position, ensuring uniform tension at the edge of the separator. After the electrodes are stacked, a concave electrode receiving area is formed to limit the position of the electrode and further ensure the stacking accuracy of the electrodes.

[0016] 4. The adsorption plate in the electrode delivery assembly can detach from the separator before the branch tube and the pusher tube, ensuring the separator is tensioned while the electrode is being picked up, thereby improving the electrode delivery efficiency and thus improving the battery forming efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the roller assembly of the present invention; Figure 3 This is a schematic diagram of the film delivery assembly of the present invention; Figure 4 This is a schematic diagram of the structure of the mobile platform of the present invention; Figure 5 This is a schematic diagram of the structure of the electrode delivery assembly of the present invention.

[0018] The components include: 1. Vertical plate; 1001. Through-hole; 2. Fixed platform; 21. Linear motor module one; 3. Base plate; 4. Unwinding assembly; 5. Roller assembly; 51. Guide roller one; 52. Guide roller two; 53. Film feeding roller one; 54. Film feeding roller two; 55. Guide roller three; 56. Swing plate; 57. Motor two; 58. Motor three; 6. Film clamping block; 61. Cylinder one; 7. Film feeding assembly; 71. Mounting plate; 72. Motor four; 73. Mounting frame; 7 4. Film feeding roller three; 75. Film feeding roller four; 76. Motor five; 8. Moving platform; 81. Linear motor module two; 82. Cylinder two; 83. Cylinder three; 84. Lifting plate one; 85. Lifting plate two; 9. Stacking table; 10. Electrode delivery assembly; 101. Support table; 102. Slide table; 103. Cylinder four; 104. Cylinder five; 105. Adsorption plate; 106. Branch pipe; 107. Film pushing pipe; 11. Take-up drum; 12. Diaphragm. 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] It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the present invention, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In addition, if any description involving "first," "second," etc., is involved in the embodiments of the present invention, such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0021] This invention provides an electrode processing device for lithium-ion power batteries, used for stacking positive and negative electrodes and separator 12, improving the stacking efficiency of electrodes, especially improving the efficiency and accuracy and stability of electrode placement during the stacking process of long electrodes, thereby improving the battery forming efficiency and forming quality.

[0022] Specifically, please refer to Figures 1 to 5 The present invention discloses an electrode processing device for lithium-ion power batteries, including a processing table, which is composed of a vertical plate 1, a fixed platform 2 and a base plate 3 connected and fixed from top to bottom.

[0023] The front end of the vertical plate 1 is equipped with an unwinding assembly 4 and a roller group 5. A pair of film clamping blocks 6 are set below the roller group 5 at the front end of the vertical plate 1. The two film clamping blocks 6 are respectively installed on the output ends of the two cylinders 61 installed at the front end of the vertical plate 1.

[0024] The unwinding assembly 4 is used to unwind the diaphragm 12 wound on the take-up drum 11; the end of the diaphragm 12 away from the take-up drum 11 passes around the roller group 5 along the movement trajectory of the diaphragm 12 and passes vertically downward through the two clamping blocks 6; the roller group 5 is used for conveying and guiding the diaphragm 12.

[0025] In this embodiment, the unwinding assembly 4 includes an unwinding shaft and a motor for driving the unwinding shaft to rotate. One end of the unwinding shaft is rotatably mounted on the front end of the vertical plate 1 via a bearing, and its axial direction is perpendicular to the front end of the vertical plate 1. The motor is fixedly mounted on the rear end of the vertical plate 1, and its output end is connected to one end of the unwinding shaft for transmission. The other end of the unwinding shaft is detachably connected coaxially to the take-up drum 11 for transmission. The constant-speed rotation of the motor's output end causes the unwinding shaft to rotate around its own central axis, thereby driving the take-up drum 11 to rotate synchronously, achieving continuous, constant-speed unwinding of the diaphragm 12. The motor is a servo motor.

[0026] The roller assembly 5 includes guide roller 1 51, guide roller 2 52, film feeding roller 1 53, film feeding roller 2 54, and guide roller 3 55 arranged sequentially along the moving trajectory of the diaphragm 12. Guide roller 1 51, guide roller 2 52, and guide roller 3 55 are all rotatably mounted on the front end of the vertical plate 1 via bearings, and their axial directions are all perpendicular to the front end of the vertical plate 1. Film feeding roller 1 53 and film feeding roller 2 54 are both rotatably mounted on the swing plate 56 via bearings. The swing plate 56 is fixed to the output end of motor 2 57 mounted at the rear end of the vertical plate 1. Two motors 3 58 are also mounted on the swing plate 56, respectively used to drive the rotation of film feeding roller 1 53 and film feeding roller 2 54. Motors 2 57 and motor 3 58 are both servo motors.

[0027] Motor 2 57 is used to drive the swing plate 56 to swing, and adjust the angle between the line connecting film feeding roller 1 53 and film feeding roller 2 54 and the horizontal plane. This allows the tension of the diaphragm 12 to be adjusted during the rotation and conveying of the diaphragm 12 by film feeding roller 1 53 and film feeding roller 2 54. It can also control the reserved length of the diaphragm 12 between guide roller 2 52 and guide roller 3 55. This ensures that the diaphragm 12 laying speed is not limited by the unwinding speed of the diaphragm 12 during the diaphragm 12 laying stage. This allows the diaphragm 12 laying speed to be increased without increasing the unwinding speed of the diaphragm 12, thereby shortening the electrode stacking interval and improving the electrode stacking efficiency.

[0028] It should be noted that the vertical plate 1 is provided with an opening 1001 for the rotational movement of the first film feeding roller 53 and the second film feeding roller 54.

[0029] A linear motor module 21 is horizontally fixed on the fixed platform 2, with its moving end facing forward and a pair of film feeding assemblies 7 fixed thereon. The two film feeding assemblies 7 cooperate with the two film feeding rollers to convey the diaphragm 12 downwards. The differential speed between the film feeding assemblies 7 and the film feeding rollers ensures that the diaphragm 12 between the guide roller 55 and the film feeding assemblies 7 is in a tensioned state suitable for stacking, further improving the flattening speed of the diaphragm 12.

[0030] In this embodiment, the film feeding assembly 7 includes a mounting plate 71, a fourth motor 72, a mounting frame 73, a third film feeding roller 74, a fourth film feeding roller 75, and a fifth motor 76; The mounting plate 71 is fixedly mounted on the moving end of the linear motor module 21. The motor 72 is fixedly mounted on the mounting plate 71, and its output end is coaxially fixedly connected to the mounting frame 73. The mounting frame 73 is rotatably connected to the front end of the mounting plate 71 through bearings. One end of the mounting frame 73 faces the diaphragm 12, and film feeding rollers 75 and 74 are rotatably mounted on the upper and lower sides respectively. The film feeding rollers 75 and 74 alternately connect to the diaphragm 12. The motor 76 is installed inside the mounting frame 73. The output end of the motor 76 is connected to the film feeding rollers 75 and 74 through two transmission components respectively.

[0031] The horizontal reciprocating movement of the linear motor module 21 enables the film feeding assembly 7 to move horizontally, thereby allowing the diaphragm 12 to be laid flat along a "Z" shaped trajectory. The oscillation of the mounting frame 73 driven by the motor 72 enables the film feeding roller 75 and the film feeding roller 74 to alternately contact the diaphragm 12, controlling the angle between the diaphragm 12 and the electrode, and reducing or even avoiding the "dragging" effect of the electrode as the number of electrode stacking layers increases.

[0032] The transmission assembly enables the film feeding rollers 74 and 75 in the same film feeding assembly 7 to move synchronously, that is, to rotate in the same direction and at the same speed, and to start and stop at the same time.

[0033] It should be noted that the transmission assembly can be any one of the following: synchronous pulley and synchronous belt transmission assembly, pulley and belt transmission assembly, and sprocket and chain transmission assembly.

[0034] A moving platform 8 is installed on the upper end of the base plate 3, and a stacking platform 9 is installed on the moving end of the moving platform 8. The stacking platform 9 is horizontally positioned below the membrane feeding assembly 7. The stacking platform 9 is a negative pressure suction plate structure. The negative pressure suction holes of the stacking platform 9 are evenly distributed on its upper surface. The hole diameter is 0.8–1.2 mm and the hole spacing is 5 mm. With the help of a negative pressure air source with a vacuum degree of -60 kPa to -80 kPa, it is ensured that the diaphragm 12 is always flat and attached without wrinkles or displacement during the high-speed stacking process.

[0035] On the mobile platform 8, on opposite sides of the stacking platform 9 in the horizontal direction, there are two electrode delivery assemblies 10. The two electrode delivery assemblies 10 are used to deliver positive electrode and negative electrode respectively, and they operate alternately to achieve the alternating stacking of positive and negative electrode and separator 12 on the stacking platform 9.

[0036] In this embodiment, the mobile platform 8 includes a linear motor module 2 81, a cylinder 2 82, and a cylinder 3 83.

[0037] Among them, linear motor module 2 81 is fixed to the upper end of the base plate 3 and is parallel to linear motor module 1 21; the output end of linear motor module 2 81 is fixedly connected to lifting plate 1 84; lifting plate 2 85 is arranged parallel above lifting plate 1 84, and cylinder 2 82 is installed between the two, and the lifting plate 2 85 is lifted relative to lifting plate 1 84 by the piston movement at the output end of cylinder 2 82. Cylinder 3 83 is vertically mounted on the upper end of lifting plate 2 85, with its output end facing vertically upward and fixedly connected to stacking platform 9; Cylinder 3 83 is used to adjust the height of stacking platform 9 in the Z direction so that the height of stacking platform 9 can be gradually reduced as the number of electrode stacking layers increases.

[0038] In this embodiment, the electrode delivery assembly 10 includes a support platform 101, a cylinder 4 103, and a cylinder 5 104; wherein, the support platform 101 is fixed to the upper end of the lifting plate 2 85, and a slide 102 is horizontally slidably installed on both sides of the end of the support platform 101 away from the stacking platform 9, and a drive assembly for driving the two slides 102 to perform opening and closing actions is provided between the two slides 102.

[0039] It should be noted that, in this embodiment, the opening and closing assembly consists of a motor and a gear and rack transmission structure assembly, two horizontally arranged cylinders, or two horizontally arranged electric cylinders.

[0040] A cylinder 103 is fixedly connected to the middle of the end of the support platform 101 away from the stacking platform 9. The output end of the cylinder 103 passes through the support platform 101 and is fixedly connected to an adsorption plate 105. The adsorption plate 105 is used to adsorb the electrode sheet, and when the electrode sheet moves above the stacking position, it releases the adsorption and exhausts the air downward, thereby pressing the electrode sheet onto the diaphragm 12.

[0041] Two slides 102 are each fixedly connected to a cylinder 104 at the end furthest from the stacking platform 9. The output ends of both cylinders 104 pass through the support platform 101 and are respectively fixedly connected to branch pipes 106. Each branch pipe 106 is fixedly connected to a film-pushing pipe 107 at the end furthest from the cylinder 104. The film-pushing pipes 107 are horizontally arranged and perpendicular to the branch pipes 106. The opposite ends of the two film-pushing pipes 107 can coaxially abut against each other. An adsorption plate 105 is located between the two branch pipes 106 and the two film-pushing pipes 107. The maximum distance between the two branch pipes 106 is less than the width of the diaphragm 12.

[0042] In use, in the initial state, the adsorption plate 105, the two branch pipes 106 and the two push film pipes 107 are all located above the support platform 101, and the two push film pipes 107 are in contact with each other.

[0043] When performing electrode stacking operation, the first step is to position the adsorption plate 105, the two branch tubes 106 and the two push film tubes 107 above their respective support platforms 101, and to make the two push film tubes 107 abut against each other.

[0044] Step 2: The adsorption plate 105 on one side adsorbs the electrode sheet from the upper end of the support platform 101 near the stacking platform 9; then, cylinders 4 103 and 5 104 move synchronously to move the electrode sheet above the stacking position, and both push membrane tubes 107 contact the diaphragm 12; then, the adsorption plate 105 releases and presses down on the electrode sheet; completing one stacking of the electrode sheet.

[0045] Step 3: The adsorption plate 105 on the other side cooperates with the pusher tube 107 on the other side to push the diaphragm 12 around the pusher tube 107 from the previous stacking until the adsorption plate 105 for this stacking moves above the stacking position. Then, the adsorption plate 105 from the previous stacking is reset. After that, the adsorption plate 105 for this stacking is released and presses down on the electrode. Then, the pusher tubes 107 from the previous stacking move away from each other, so that the branch tube 106 and the pusher tube 107 are disengaged from the diaphragm 12 and reset. The current electrode stacking operation is completed.

[0046] Step 4: Repeat step 3 until all electrode stacking operations are completed.

[0047] During the current electrode stacking process, the branch pipe 106 and the pusher pipe 107 from the previous electrode stacking work together with the pusher pipe 107 from the current electrode stacking to support the diaphragm 12 at the edge of the stacking position, ensuring uniform tension at the edge of the diaphragm 12; and after the electrodes are stacked, a concave electrode receiving area is formed to restrict the position of the electrodes; therefore, to prevent the diaphragm 12 around the electrodes from wrinkling after the pusher pipe 107 detaches from the diaphragm 12, a duct connector is connected to the side of the branch pipe 106 near the cylinder 104 to connect to a negative pressure source. The branch pipe 106 and the pusher pipe 107 are interconnected, and negative pressure suction holes are provided on the side of the branch pipe 106 and the pusher pipe 107 facing the adsorption plate 105 to form a low pressure below the diaphragm 12, so that the diaphragm 12 is smoothed by the airflow above it.

[0048] It should be noted that the electrode sheet is conveyed to the underside of the adsorption plate 105 by an electrode sheet conveyor installed on the upper end of the support platform 101 near the stacking platform 9, and then abuts against the lower surface of the adsorption plate 105 during the upward movement of the conveyor.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrode processing apparatus for a lithium-ion power battery, comprising a processing table, an unwinding assembly for unwinding a separator (12), and a stacking table (9) for stacking the electrode and the separator (12), characterized in that: A moving platform (8) is provided on the processing table below the stacking table (9). The moving platform (8) is used to provide horizontal and vertical movement of the stacking table (9). An electrode delivery assembly (10) is installed on both sides of the moving platform (8) opposite to the stacking table (9) in the horizontal direction. The two electrode delivery assemblies (10) are used to deliver positive electrode and negative electrode respectively, and they operate alternately to realize that positive and negative electrode and separator (12) are alternately stacked on the stacking table (9). The electrode delivery assembly (10) includes a support platform (101), cylinder four (103), and cylinder five (104). A slide table (102) is horizontally slidably mounted on each side of the support platform (101) away from the stacking platform (9). A drive assembly for opening and closing the two slide tables (102) is provided between them. Cylinder four (103) is fixedly connected to the middle of the support platform (101) away from the stacking platform (9). The output end of cylinder four (103) passes through the support platform (101) and is fixedly connected to an adsorption plate (105). The adsorption plate (105) is used to adsorb the electrode. And when the electrode moves to the top of the stacking position, it releases adsorption and exhausts downward, pressing the electrode onto the diaphragm (12); the ends of the two slides (102) away from the stacking platform (9) are fixedly connected to cylinder five (104); the output ends of the two cylinders five (104) pass through the support platform (101) and are respectively fixedly connected to branch pipes (106), and the ends of the two branch pipes (106) away from the cylinder five (104) are fixedly connected to push film tubes (107); the push film tubes (107) are arranged horizontally and are perpendicular to the branch pipes (106); the ends of the two push film tubes (107) facing each other can be coaxially abutted against each other.

2. The electrode processing apparatus for a lithium-ion power battery according to claim 1, characterized in that: The adsorption plate (105) is located between the two branch pipes (106) and the two push-film pipes (107), and the maximum distance between the two branch pipes (106) is less than the width of the diaphragm (12).

3. The electrode processing apparatus for a lithium-ion power battery according to claim 2, characterized in that: The side of the branch pipe (106) near the cylinder five (104) is connected to an air pipe connector to connect to a negative pressure source. The branch pipe (106) and the push film pipe (107) are connected to each other, and negative pressure suction holes are provided on the side of the branch pipe (106) and the push film pipe (107) facing the adsorption plate (105).

4. The electrode processing apparatus for a lithium-ion power battery according to claim 1, characterized in that: It also includes a roller group (5) for guiding the conveying of the diaphragm (12); the roller group (5) consists of a guide roller 1 (51), a guide roller 2 (52), a film feeding roller 1 (53), a film feeding roller 2 (54) and a guide roller 3 (55) arranged sequentially along the moving trajectory of the diaphragm (12). Among them, the guide roller 1 (51), guide roller 2 (52) and guide roller 3 (55) are all rotatably mounted on the front end of the mounting platform through bearings; the film feeding roller 1 (53) and film feeding roller 2 (54) are both rotatably mounted on a swing plate (56) through bearings; the swing plate (56) is fixed on the output end of the motor 2 (57) installed at the rear end of the mounting platform; the swing plate (56) is also equipped with two motors 3 (58), which are used to drive the film feeding roller 1 (53) and film feeding roller 2 (54) to rotate respectively.

5. The electrode processing apparatus for a lithium-ion power battery according to claim 4, characterized in that: It also includes a pair of film feeding assemblies (7); both film feeding assemblies (7) are mounted on the moving end of the linear motor module (21) mounted at the front end of the mounting platform.

6. The electrode processing apparatus for a lithium-ion power battery according to claim 5, characterized in that: The film feeding assembly (7) includes a mounting frame (73); film feeding roller four (75) and film feeding roller three (74) are rotatably mounted on the upper and lower sides of the end of the mounting frame (73) facing the diaphragm (12); a motor five (76) is installed inside the mounting frame (73), and the output end of the motor five (76) is connected to the film feeding roller four (75) and film feeding roller three (74) through two transmission components.

7. The electrode processing apparatus for a lithium-ion power battery according to claim 6, characterized in that: The linear motor module 1 (21) is also equipped with a motor 4 (72) for driving the mounting frame (73) to swing, so that the film feeding roller 4 (75) and film feeding roller 3 (74) alternately contact the diaphragm (12).

8. A method for processing electrode sheets of a lithium-ion power battery, characterized in that: The electrode processing apparatus according to any one of claims 1 to 3 is used.

9. A method for processing electrode sheets of a lithium-ion power battery according to claim 8, characterized in that: Step S1: Position the adsorption plate (105), the two branch tubes (106) and the two push film tubes (107) above their respective support platforms (101), and make the two push film tubes (107) abut against each other; Step S2: The adsorption plate (105) on one side adsorbs the electrode sheet from the upper end of the support platform (101) to the side of the stacking platform (9); Then, cylinders four (103) and five (104) move synchronously to move the electrode sheet above the stacking position, and both pusher tubes (107) contact the diaphragm (12); then, the adsorption plate (105) releases and presses down on the electrode sheet; thus completing one stacking of the electrode sheet; Step S3: The adsorption plate (105) on the other side cooperates with the pusher tube (107) on the other side to push the diaphragm (12) around the pusher tube (107) during the previous stacking until the adsorption plate (105) during this stacking moves above the stacking position. Then, the adsorption plate (105) during the previous stacking is reset. After that, the adsorption plate (105) during this stacking is released and presses down on the electrode. Then, the pusher tubes (107) during the previous stacking move away from each other, so that the branch tube (106) and the pusher tube (107) are separated from the diaphragm (12) and reset. The current electrode stacking operation is completed. Step S4: Repeat step 3 until all electrode stacking operations are completed.

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