Stacking device and method

Abstract

Disclosed in the present application are a stacking device and method. The stacking device comprises a stacking table, and a first sheet-picking gripper mechanism and a second sheet-picking gripper mechanism, which are arranged on two sides of the stacking table, wherein the first sheet-picking gripper mechanism obliquely conveys a cut electrode sheet in a first direction, and places the electrode sheet on a horizontal placement surface of the stacking table, and an included angle between the first direction and the horizontal placement surface is 8-15°; a film swing mechanism covers the electrode sheet placed on the stacking table with a film, and then performs pressing by means of a pressure blade; the second sheet-picking gripper mechanism obliquely conveys a cut electrode sheet in a second direction, places the electrode sheet on the film covering the previous electrode sheet, and then pressing is performed by means of the pressure blade, and an included angle between the second direction and the horizontal placement surface is 8-15°; and the film swing mechanism covers the electrode sheet placed on the stacking table with a film, and then performs pressing by means of the pressure blade. The present application can improve the effect of rapidly positioning the electrode sheets during stacking, and the electrode sheets are rapidly stacked by means of a left-right alternately stacking manner, thereby improving the stacking efficiency.

Description

Lamination device and method

[0001] This application is based on the Chinese patent application with application number 202311805676.3 and application date December 26, 2023, and the PCT international application with application number PCT / CN2023 / 136348 and application date December 5, 2023, and claims its priority. The entire contents of the application are hereby introduced into this application as a whole. Technical Field

[0002] The present application relates to the technical field of battery pole piece lamination, and in particular to a lamination device and method. Background Art

[0003] During the lithium-ion battery manufacturing process, a stacking machine is typically used to stack the positive and negative electrodes in alternating layers to form battery cells. In a commonly used lithium-ion battery cell stacking machine, a suction cup is first used to pick up the positive or negative electrode sheet from a magazine and transport it to the corresponding positioning table. When the electrode sheet needs to be stacked, the suction cup is used again to pick it up from the positioning table and transport it to the stacking table to complete the stacking operation.

[0004] Chinese patent publication number, CN107768730A, discloses a lithium battery electrode stacking device, in which a plurality of equally spaced electrode box baffles are provided on the electrode box, and the battery electrodes are inserted between the electrode box baffles; the electrode grabbing robot is connected to the lifting device, the lifting device is connected to the lateral moving device, and the lateral moving device is installed on the frame; the two sides of the diaphragm bracket are provided with bracket grooves; there are multiple diaphragm support rods, one end of the diaphragm support rod passes through the bracket groove and is connected to the diaphragm support rod positioning device, and the diaphragm support rod positioning device is movably connected to the diaphragm tightening device; the diaphragm is staggered and tightened at the other end of the diaphragm support rod to form a Z shape, forming multiple electrode slots; the battery cell grabbing robot is connected to the articulated robot arm; the frame, diaphragm tightening device and articulated robot arm are all fixed on the base; the electrode box is movably mounted on the base.

[0005] Due to efficiency limitations, conventional Z-shaped cutting and stacking machines need to adopt a multi-station segmented design, which increases the size of the equipment. The stacking of multiple stations is more likely to increase the equipment failure rate and reduce the equipment operation efficiency. Application Contents

[0006] In order to overcome the deficiencies of the prior art, the present application provides a lamination device and method, which can improve the alignment of the laminations and quickly stack the laminations in a left-right overlapping manner, thereby improving the lamination efficiency.

[0007] The technical solution adopted by this application to solve its technical problems is:

[0008] A laminating device comprises a laminating platform and a first laminating claw mechanism and a second laminating claw mechanism arranged on both sides of the laminating platform, wherein the first laminating claw mechanism and the second laminating claw mechanism are used to alternately convey the cut pole pieces to the laminating platform, characterized in that the first laminating claw mechanism and the second laminating claw mechanism are symmetrically arranged, the first laminating claw mechanism comprises a first feeding claw and a first driving member, the first driving member is used to drive the first feeding claw to move linearly along a first direction, the laminating platform comprises a horizontal placement surface for placing the pole pieces, the first direction is based on the The horizontal placement surface is tilted; the second film-picking clamp mechanism includes a second feeding clamp and a second driving member, the second driving member is used to drive the second feeding clamp to move linearly along a second direction, the second direction is based on the tilt setting of the horizontal placement surface, and the second direction is opposite to the tilt direction of the first direction; the stacking device also includes a film swinging mechanism arranged above the stacking table, the film swinging mechanism is used to coat the pole piece on the stacking table, and the film swinging mechanism can swing left and right to avoid feeding of the first film-picking clamp mechanism and the second film-picking clamp mechanism.

[0009] As a further improvement of the above technical solution, the angle between the first direction and the horizontal placement surface is 8-15°; the angle between the second direction and the horizontal placement surface is 8-15°.

[0010] As a further improvement of the above technical solution, a pressure knife assembly is provided on the film swing mechanism, and the pressure knife assembly is used to press the electrode and the film.

[0011] As a further improvement of the above technical solution, the first driving member includes a first linear motor arranged obliquely along a first direction, and the first feeding clamp is installed at the movable end of the first linear motor; the second driving member includes a second linear motor arranged obliquely along a second direction, and the second feeding clamp is installed at the movable end of the second linear motor.

[0012] As a further improvement of the above technical solution, the first feeding clamp and the second feeding clamp both include a mounting plate, a feeding clamp pressure plate, a feeding clamp lower plate, a first guide rail slider assembly and a third driving member. The feeding clamp pressure plate is slidably connected to the mounting plate through the first guide rail slider assembly, and the feeding clamp lower plate is fixedly connected to the mounting plate. The third driving member is used to drive the feeding clamp pressure plate to approach or move away from the feeding clamp lower plate to clamp or release the pole piece.

[0013] As a further improvement of the above technical solution, the third driving member includes a servo motor, an eccentric mechanism, a second guide rail slider assembly and a support plate. The feeding clamp pressure plate is connected to the top of the support plate. The support plate is slidably connected to the mounting plate through the second guide rail slider assembly. The servo motor is connected to the eccentric mechanism to drive the support plate to rise and fall.

[0014] As a further improvement of the above technical solution, the first feeding clamp and the second feeding clamp also include a buffer member, which is connected between the feeding clamp pressure plate and the support plate. The buffer member is used to provide an upward buffering force to the feeding clamp pressure plate when it moves downward.

[0015] As a further improvement of the above technical solution, the buffer member includes a cylinder, the fixed end of the cylinder is fixedly connected to the support plate, and the movable end of the cylinder is fixedly connected to the feeding clamp pressure plate.

[0016] The technical solutions also provided in this application are:

[0017] A lamination method comprises the following steps:

[0018] The first film-taking gripper mechanism tilts the cut electrode sheet out along the first direction and places the electrode sheet on the horizontal placement surface of the lamination table, with the angle between the first direction and the horizontal placement surface being 8-15°;

[0019] The film swing mechanism covers the film on the pole piece placed on the lamination table and presses it tightly with a pressing knife. At this time, the film swing mechanism swings to the left side of the lamination table.

[0020] The second sheet-taking gripper mechanism tilts the cut electrode sheet out along the second direction, places the electrode sheet on the film covering the previous electrode sheet, and presses it with a pressing knife. The angle between the second direction and the horizontal placement surface is 8-15 degrees.

[0021] The film swing mechanism covers the film on the pole piece placed on the lamination table and presses it tightly with a pressing knife. At this time, the film swing mechanism swings to the right side of the lamination table.

[0022] Repeat the above steps to complete the stacking of the battery cells.

[0023] As a further improvement of the above technical solution, when the first film-picking clamping mechanism tilts the electrode sheet out along the first direction, the front end of the electrode sheet stops at the right reference position of the horizontal placement surface of the stacking table, and at this time the first film-picking clamping mechanism releases the electrode sheet and puts the electrode sheet down; when the second film-picking clamping mechanism tilts the electrode sheet out along the second direction, the front end of the electrode sheet stops at the left reference position of the horizontal placement surface of the stacking table, and at this time the second film-picking clamping mechanism releases the electrode sheet and puts the electrode sheet down.

[0024] The beneficial effects of the present application are as follows: the cut electrodes are alternately loaded onto the stacking table for stacking through the first electrode picking clamp mechanism and the second electrode picking clamp mechanism, and the electrodes are fed at an angle of 10° to the horizontal placement surface, so as to effectively improve the alignment of the stacking and improve the quality of the battery cell; in addition, the electrodes are quickly stacked by overlapping left and right, which increases the stacking speed and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application is further described below with reference to the accompanying drawings and examples.

[0026] FIG1 is a schematic diagram of an assembly of a lamination device of the present application;

[0027] FIG2 is a schematic diagram of a lamination device in the initial position of the present application;

[0028] FIG3 is a schematic diagram of the first film-taking clamping mechanism of the present application delivering the film to the laminating table;

[0029] FIG4 is a schematic diagram of the second film-taking clamping mechanism of the present application delivering the film to the laminating table;

[0030] FIG5 is a structural diagram of the first film-taking clamping mechanism of the present application;

[0031] FIG6 is a second structural diagram of the first film-taking clamping mechanism of the present application;

[0032] FIG7 is a schematic diagram of a film swing mechanism and a lamination table in a lamination device of the present application.

[0033] Figure numerals: 1. stacking table; 11. horizontal placement surface; 2. first film-taking clamp mechanism; 21. first driving member; 22. first feeding clamp; 221. feeding clamp pressure plate; 222. feeding clamp lower plate; 223. buffer member; 224. third driving member; 2241. servo motor; 2242. eccentric mechanism; 2243. support plate; 225. base; 2251. bottom plate; 2252. mounting plate; 3. second film-taking clamp mechanism; 31. second driving member; 32. second feeding clamp; 4. film swing mechanism; 5. cutting mechanism; 6. pole piece. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the concept, specific structure and technical effects of this application in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features created in this application can be combined interactively without conflicting with each other.

[0035] 1 , the film swing mechanism 4 is a film swing mechanism, and the like is a film swing mechanism. The components include a pressing knife and a pressing cylinder. The pressing knife cylinder drives the pressing knife downward to press the electrode 6 and the film, thereby improving the quality of the battery cell. In addition, the film swing mechanism 4 can swing left and right to avoid the feeding of the first and second film-taking claw mechanisms 2 and 3. That is, when the first film-taking claw mechanism 2 conveys the electrode to the laminating table 1, the film swing mechanism 4 swings to the right side of the laminating table 1, thereby allowing sufficient space for the first feeding claw 22 of the first film-taking claw mechanism 2 to move above the laminating table 1. Similarly, when the second film-taking claw mechanism 3 conveys the electrode to the laminating table 1, the film swing mechanism 4 swings to the left side of the laminating table 1, thereby allowing sufficient space for the second feeding claw 32 of the second film-taking claw mechanism 3 to move above the laminating table 1. In this embodiment, through the alternating lamination of the first and second film-taking claw mechanisms 2 and 3, and the lamination of the film by the film swing mechanism 4, battery cell products can be quickly obtained, with high production efficiency.

[0036] In this embodiment, referring to Figures 2, 3, and 4, the first film-retrieving jaw mechanism 2 includes a first feed jaw 22 and a first driving member 21. The first driving member 21 is used to drive the first feed jaw 22 to perform linear motion along a first direction. The lamination table 1 includes a horizontal placement surface 11, which is horizontally arranged. The pole pieces are placed on the horizontal placement surface 11 during lamination. The first direction is inclined relative to the horizontal placement surface 11, and the angle between the first direction and the horizontal placement surface 11 is 8-15° (the angle with the horizontal plane is 175-192°), preferably 10°. Similarly, the second film-retrieving jaw mechanism 3 includes a second feed jaw 32 and a second driving member 31. The second driving member 31 is used to drive the second feed jaw 32 to perform linear motion along a second direction. The second direction is inclined relative to the horizontal placement surface 11, and the second direction is in the opposite direction of the first direction. The angle between the second direction and the horizontal placement surface 11 is 8-15°, and preferably 10°. By feeding the pole pieces 6 at an angle of 10° to the horizontal placement surface 11 of the lamination table 1 , the alignment of the laminations can be effectively improved, thereby improving the quality of the battery cell.

[0037] Furthermore, the first drive member 21 includes a first linear motor tilted in a first direction, with the first feed clamp 22 mounted on the movable end of the first linear motor. The second drive member 31 includes a second linear motor tilted in a second direction, with the second feed clamp 32 mounted on the movable end of the second linear motor. In other words, the operation of the first and second linear motors allows the pole pieces 6 to be transported to the lamination table 1 in either the first or second direction. Using linear motors as a power source improves the accuracy of the feeding process, thereby further enhancing the alignment of the laminations.

[0038] In this embodiment, since the first film-picking clamping mechanism 2 and the second film-picking clamping mechanism 3 are symmetrically arranged, that is, the structures of the two are the same, the structure of the first film-picking clamping mechanism 2 is used as an illustration here, referring to Figures 5 and 6, the first film-picking clamping mechanism 2 includes a base 225, and the base 225 includes a bottom plate 2251 and a mounting plate 2252. The bottom plate 2251 is connected to the mover of the first linear motor. When the first linear motor is in operation, it drives the bottom plate 2251 to move linearly, and then drives the entire first film-picking clamping mechanism 2 to move linearly.

[0039] The first feeding clamp 22 includes a feeding clamp pressure plate 221, a feeding clamp lower plate 222, a first guide rail slider assembly and a third driving member 224. The feeding clamp pressure plate 221 is slidably connected to the mounting plate 2252 through the first guide rail slider assembly. The feeding clamp lower plate 222 is fixedly connected to the mounting plate 2252. The feeding clamp lower plate 222 is fixedly connected to the mounting plate 2252. The third driving member 224 is used to drive the feeding clamp pressure plate 221 to approach or move away from the feeding clamp lower plate 222 to clamp or release the pole piece 6. Specifically, the third driving member 224 includes a servo motor 2241, an eccentric mechanism 2242, a second guide rail slider assembly and a support plate 2243. The feeding clamping plate 221 is connected to the top of the support plate 2243. The support plate 2243 is slidably connected to the mounting plate 2252 along the vertical direction through the second guide rail slider assembly. The servo motor 2241 is installed on the bottom plate 2251, and the eccentric mechanism 2242 is installed on the mounting plate 2252. The eccentric mechanism 2242 is connected between the output shaft of the servo motor 2241 and the support plate 2243, thereby When the output shaft of the servo motor 2241 rotates, it drives the eccentric mechanism 2242 to operate, and then drives the support plate 2243 to move up and down in the vertical direction, and then drives the feeding clamp pressure plate 221 to move up and down. When the feeding clamp pressure plate 221 moves up and down, it moves away from or close to the feeding clamp lower plate 222, thereby realizing the closing or separation of the feeding clamp, and thus clamping or loosening the pole piece 6. When the feeding clamp clamps the pole piece 6, it facilitates the stable feeding of the pole piece 6. When the pole piece 6 is fed to the specified position of the stacking table 1, the first feeding clamp loosens the pole piece 6 to place the pole piece 6 on the stacking table 1.

[0040] The first feeding jaw 22 and the second feeding jaw 32 also include a buffer member 223. Taking the first feeding jaw 22 as an example, the buffer member 223 is connected between the feeding jaw pressure plate 221 and the support plate 2243. The buffer member 223 is used to provide an upward buffering force to the feeding jaw pressure plate 221 when it moves downward, so as to reduce the pressure of the feeding jaw pressure plate 221 on the feeding jaw lower plate 222. Specifically, the buffer member 223 includes a cylinder, the fixed end of the cylinder is fixedly connected to the support plate 2243, and the movable end of the cylinder is fixedly connected to the feed clamp pressure plate 221. When the servo motor 2241 is running, it drives the support plate 2243, the cylinder and the feed clamp pressure plate 221 to move downward or upward synchronously. When the feed clamp pressure plate 221 moves downward and closes with the feed clamp lower plate 222 to clamp the pole piece 6, the cylinder provides a buffering force to remove the impact force of the feed clamp pressure plate 221 on the feed clamp lower plate 222, thereby preventing the feed clamp pressure plate 221 from crushing the pole piece 6 when clamping the pole piece 6.

[0041] An embodiment of the present application further includes a lamination method, which is applied to the above-mentioned lamination device and includes the following steps:

[0042] Step 1: The feeding clamping plate 221 and the feeding clamping plate 222 in the first film-taking clamping mechanism 2 clamp the pole piece 6 cut by the cutting mechanism 5, and then the first linear motor runs to tilt the pole piece 6 and feed it out along the first direction. The angle between the first direction and the horizontal placement surface 11 of the laminating table 1 is 10 degrees. When the front end of the pole piece 6 reaches the right reference position of the horizontal placement surface 11 of the laminating table 1, the conveying is stopped (refer to Figure 3). The cylinder drives the feeding clamping plate 221 away from the feeding clamping plate 222, releases the pole piece 6, and places the pole piece 6 on the horizontal placement surface 11 of the laminating table 1. The first linear motor runs to drive the first feeding clamping plate 22 back to the initial position (refer to Figure 2);

[0043] In step 2, the film swing mechanism 4 covers the film on the pole piece 6 placed on the lamination table 1 in step 1 and presses it with a pressing knife. At this time, the film swing mechanism 4 swings to the left side of the lamination table 1.

[0044] Step three, the feeding clamping plate 221 and the feeding clamping plate 222 in the second film-taking clamping mechanism 3 clamp the electrode 6 cut by the cutting mechanism 5, and then the second linear motor runs to tilt the electrode 6 and send it out along the second direction, the angle between the second direction and the horizontal placement surface 11 of the laminating table 1 is 10 degrees, and the conveying is stopped when the front end of the electrode 6 reaches the left reference position of the horizontal placement surface 11 of the laminating table 1 (refer to Figure 4), and the cylinder in the second film-taking clamping mechanism 3 drives the feeding clamping plate 221 away from the feeding clamping plate 222, releases the electrode 6, and places the electrode 6 on the compressed film on the laminating table 1, and the second linear motor runs to drive the second feeding clamping plate 32 to return to the initial position (refer to Figure 2);

[0045] Step 4: The film swing mechanism 4 covers the film on the pole piece 6 placed on the lamination table 1 in step 3 and presses it with a press knife. At this time, the film swing mechanism 4 swings to the right side of the lamination table 1.

[0046] Repeat steps 1 to 4 to complete the stacking of the battery cells.

[0047] In the present application, the cut electrode sheets 6 are alternately loaded onto the stacking table 1 for stacking through the first electrode picking clamp mechanism 2 and the second electrode picking clamp mechanism 3, and the electrode sheets 6 are fed at an angle of 10° to the horizontal placement surface 11, so as to effectively improve the alignment of the stacking and improve the quality of the battery cell; in addition, the stacking is carried out quickly by overlapping left and right, which increases the stacking speed and improves the work efficiency.

[0048] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the art can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A lamination device, comprising a lamination platform and a first lamination clamping mechanism and a second lamination clamping mechanism arranged on both sides of the lamination platform, wherein the first lamination clamping mechanism and the second lamination clamping mechanism are used to alternately transport the cut pole pieces to the lamination platform, characterized in that: The first film picking jaw mechanism and the second film picking jaw mechanism are symmetrically arranged, the first film picking jaw mechanism includes a first feeding jaw and a first driving member, the first driving member is used to drive the first feeding jaw to make a linear motion along a first direction, the stacking platform includes a horizontal placement surface for placing the pole piece, and the first direction is tilted based on the horizontal placement surface; the second film picking jaw mechanism includes a second feeding jaw and a second driving member, the second driving member is used to drive the second feeding jaw to make a linear motion along a second direction, the second direction is tilted based on the horizontal placement surface, and the second direction is opposite to the inclination direction of the first direction; the stacking device also includes a film swinging mechanism arranged above the stacking platform, the film swinging mechanism is used to coat the pole piece on the stacking platform, and the film swinging mechanism can swing left and right to avoid feeding of the first film picking jaw mechanism and the second film picking jaw mechanism.

2. A lamination device according to claim 1, characterized in that: The included angle between the first direction and the horizontal placement plane is 8-15°; the included angle between the second direction and the horizontal placement plane is 8-15°.

3. A lamination device according to claim 1, characterized in that: The film swing mechanism is provided with a knife pressing assembly, and the knife pressing assembly is used for pressing the pole piece and the film.

4. A lamination device according to claim 1, characterized in that: The first driving member includes a first linear motor tilted along a first direction, and the first feeding clamp is installed at the movable end of the first linear motor; the second driving member includes a second linear motor tilted along a second direction, and the second feeding clamp is installed at the movable end of the second linear motor.

5. A lamination device according to claim 1, characterized in that: The first feeding jaw and the second feeding jaw both include a mounting plate, a feeding jaw pressure plate, a feeding jaw lower plate, a first guide rail slider assembly and a third driving component. The feeding jaw pressure plate is slidably connected to the mounting plate via the first guide rail slider assembly, and the feeding jaw lower plate is fixedly connected to the mounting plate. The third driving component is used to drive the feeding jaw pressure plate to approach or move away from the feeding jaw lower plate to achieve clamping or loosening of the pole piece.

6. A lamination device according to claim 5, characterized in that: The third driving component includes a servo motor, an eccentric mechanism, a second guide rail slider assembly and a support plate. The feeding clamp pressure plate is connected to the top of the support plate. The support plate is slidably connected to the mounting plate through the second guide rail slider assembly. The servo motor is connected to the eccentric mechanism to drive the support plate to rise and fall.

7. A lamination device according to claim 6, characterized in that: The first feeding clamp and the second feeding clamp further include a buffer member, wherein the buffer member is connected between the feeding clamp pressure plate and the support plate, and the buffer member is used for providing an upward buffering force when the feeding clamp pressure plate moves downward.

8. A lamination device according to claim 7, characterized in that: The buffer member comprises a cylinder, a fixed end of the cylinder is fixedly connected to the support plate, and a movable end of the cylinder is fixedly connected to the feeding clamping claw pressure plate.

9. A lamination method, characterized in that: The lamination device according to any one of claims 1 to 8 comprises the following steps: The first film-taking clamp mechanism tilts the cut electrode sheet out along the first direction, and places the electrode sheet on the horizontal placement surface of the lamination table, and the angle between the first direction and the horizontal placement surface is 8-15°; The film swing mechanism covers the film on the pole piece placed on the lamination table and presses it by a pressing knife, and at this time the film swing mechanism swings to the left side of the lamination table; The second film-taking gripper mechanism tilts the cut electrode sheet out along the second direction, places the electrode sheet on the film covering the previous electrode sheet, and presses it with a pressing knife, and the angle between the second direction and the horizontal placement surface is 8-15°; The film swing mechanism covers the film on the pole piece placed on the lamination table and presses it tightly by a pressing knife, and at this time the film swing mechanism swings to the right side of the lamination table; Repeat the above steps to complete the stacking of the battery cells.

10. A lamination method according to claim 9, characterized in that: When the first film-taking clamping mechanism tilts the electrode sheet out along the first direction, the front end of the electrode sheet stops conveying to the right reference position of the horizontal placement surface of the stacking table, and the first film-taking clamping mechanism releases the electrode sheet and puts it down; when the second film-taking clamping mechanism tilts the electrode sheet out along the second direction, the front end of the electrode sheet stops conveying to the left reference position of the horizontal placement surface of the stacking table, and the second film-taking clamping mechanism releases the electrode sheet and puts it down.

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