Cutter pressing mechanism and lamination table

Abstract

The utility model discloses a pressing knife mechanism and a lamination table, the pressing knife mechanism comprises a pressing knife, a pressing knife lifting unit and a pressing knife transverse moving unit, the pressing knife lifting unit is used for driving the pressing knife to move along the vertical direction, and the pressing knife transverse moving unit is used for driving the pressing knife to move along the horizontal direction. The pressing cutter comprises two pressing cutter blades which are arranged in parallel; the inner sides of the two pressing cutter blades are connected with tab pressing sheets; the lamination table comprises a lamination table and the knife pressing mechanisms in the technical scheme, the number of the knife pressing mechanisms is two, and the two knife pressing mechanisms are symmetrically arranged on the two sides of the lamination table. According to the utility model, the tab pressing sheet is additionally arranged on the side wall of the original pressing blade, so that when the pressing blade presses a pole piece on a lamination table in the lamination process, the tab pressing sheet simultaneously presses a tab of the pole piece on the lamination table, and the tab is prevented from being folded.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery core lamination, in particular to a knife pressing mechanism and a lamination platform. Background Art

[0002] The battery cells of lithium-ion batteries are generally stacked, that is, the positive electrode sheets, separators, and negative electrode sheets are stacked in a Z shape. When stacking, the positive and negative electrode sheets processed in the die-cutting machine are first transferred alternately to the positive stacking station and the negative stacking station by a robot. The separator is in the middle of the positive and negative stacking stations, and the ends are pressed against the stacking table in the stacking mechanism. Finally, the positive and negative electrode sheets are separated in a "Z" shape by the separator until the stacking of the entire battery cell is completed.

[0003] In the existing lamination mechanism, a pressing knife is used to press the pole piece and the diaphragm, and then the pressing knife adopts a straight piece structure (CN219325299U, CN219325299U, etc.). During the lamination process, only the pole piece can be pressed, and the pole ear on the pole piece may be folded, thereby affecting the quality of the battery cell. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a knife pressing mechanism and a lamination table to solve the problem in the prior art that the pole ears may be folded during the knife pressing process of lamination.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A knife pressing mechanism comprises a knife pressing, a knife pressing lifting unit and a knife pressing transverse movement unit, wherein the knife pressing lifting unit is used to drive the knife pressing to move in a vertical direction, and the knife pressing transverse movement unit is used to drive the knife pressing to move in a horizontal direction. The knife pressing comprises two knife pressing blades arranged in parallel, and the inner sides of the two knife pressing blades are connected to a tab pressing sheet.

[0007] As a further improvement of the above technical solution, the pressure blade includes a main body and a perspective portion. When the pressure blade presses the pole piece, the perspective portion is located directly above the corner of the pole piece.

[0008] As a further improvement of the above technical solution, the press knife lifting unit includes two, and the two press knife lifting units are respectively used to drive the lifting and lowering of two press knife blades. Each of the press knife lifting units includes a fixed plate, a support plate and a lifting power source. The support plate is slidably connected to the fixed plate along the vertical direction. The press knife blade is connected to the top of the support plate through a press knife mounting block, and the press knife power source is used to drive the support plate to move up and down.

[0009] As a further improvement of the above technical solution, the support plate and the fixed plate are slidably connected via a first linear guide rail, a slide rail of the first linear guide rail is fixed on the fixed plate, and a slider of the first linear guide rail is fixed on the support plate.

[0010] As a further improvement of the above technical solution, the knife pressing power source includes a motor, a screw rod and a ball nut, and the ball nut is fixedly connected to the support plate.

[0011] As a further improvement of the above technical solution, a buffer cylinder is arranged between the pressure blade mounting block and the support plate, the fixed end of the buffer cylinder is mounted on the support plate, the pressure blade mounting block is fixed to the movable end of the buffer cylinder, and the buffer cylinder is used to buffer the collision force when the pressure blade presses the electrode sheet.

[0012] As a further improvement of the above technical solution, the press knife transverse movement unit includes a base, a mounting seat and a transverse movement power source. The mounting seat is slidably connected to the base along the horizontal direction. The transverse movement power source is used to drive the mounting seat to move left and right. The press knife lifting unit is fixed on the mounting seat.

[0013] As a further improvement of the above technical solution, the mounting seat and the base are slidably connected via a second linear guide rail, a slide rail of the second linear guide rail is fixed on the base, and a slider of the second linear guide rail is fixed on the mounting seat.

[0014] As a further improvement of the above technical solution, the moving force source includes a linear motor, a fixed end of the linear motor is mounted on a base, and a movable end of the linear motor is fixedly connected to the mounting seat.

[0015] The utility model also provides the following technical solutions:

[0016] A stacking platform comprises a stacking platform and the knife pressing mechanism in the above technical solution, wherein the knife pressing mechanism comprises two knife pressing mechanisms, and the two knife pressing mechanisms are symmetrically arranged on both sides of the stacking platform.

[0017] The beneficial effect of the utility model is that a tab pressing sheet is added to the side wall of the original pressing blade, so that when the pressing blade presses the pole piece on the stacking platform during the stacking process, the tab pressing sheet presses the pole piece tab on the stacking platform at the same time, thereby preventing the tab from folding. In addition, a perspective portion is provided on the pressing blade, and the perspective portion is located above the edge of the pole piece, so that the camera can capture the edge of the pole piece during CCD detection, thereby improving the CCD detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1It is a schematic diagram of the assembly of a lamination table according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the assembly of a knife pressing mechanism in the embodiment of the utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the assembly of a knife pressing mechanism in the embodiment of the utility model. Figure 2 ;

[0022] Figure 4 It is a top view of the pressing knife in the embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of a pressing knife and a pole piece in an embodiment of the utility model.

[0024] Figure numerals: 1, pole piece; 11, pole ear; 2, stacking table; 3, knife pressing mechanism; 31, knife pressing blade; 32, pole ear pressing piece; 33, knife pressing mounting block; 34, knife pressing lifting unit; 341, motor; 342, screw rod; 343, ball nut; 344, support plate; 345, fixing plate; 346, first linear guide; 35, buffer cylinder; 36, knife pressing transverse movement unit; 361, base; 362, second linear guide; 363, linear motor; 364, mounting seat. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0026] Reference Figure 1 and Figure 5An embodiment of the utility model provides a lamination platform, including a lamination platform 2 and two pressing knife mechanisms 3, wherein the two pressing knife mechanisms 3 are symmetrically arranged on both sides of the lamination platform 2, and each pressing knife mechanism 3 includes two pressing blades 31 and two pole tab pressing sheets 32, so that during the lamination process, the four corners of the pole sheet 1 and the pole tab 11 are pressed onto the lamination platform 2 to improve the quality of the lamination.

[0027] Reference Figure 2 and Figure 3 In an embodiment of the utility model, the press mechanism 3 includes a press, a press lifting unit 34 and a press transverse movement unit 36. The press includes two press blades 31 arranged in parallel. The inner sides of the two press blades 31 are connected to the tab pressing sheets 32. During the stacking process, the press transverse movement unit 36 ​​drives the press to move in the horizontal direction so that the press blade 31 is located directly above the corner of the pole piece 1. At this time, the tab pressing sheet 32 ​​is located directly above the pole piece 11. Then the press lifting unit 34 drives the press downward in the vertical direction to press the pole piece 1 and the tab 11 onto the stacking platform 2 to complete the stacking work, while avoiding the tab 11 from folding, thereby improving the quality of the stacked battery cell.

[0028] In a more preferred embodiment, refer to Figure 4 and Figure 5 The pressure blade 31 includes a main body and a perspective part. In a specific implementation, an opening can be opened on the original pressure blade 31. The pressure blade 31 with the opening forms the main body. A transparent sheet made of a transparent material is embedded in the opening. The transparent sheet forms the perspective part. When the pressure blade 31 presses the pole piece 1, the perspective part is located directly above the corner of the pole piece 1, so that the camera can capture the corner of the pole piece 1 during CCD detection, thereby improving the CCD detection accuracy.

[0029] In this embodiment, refer to Figure 2 and Figure 3The knife pressing mechanism 3 includes two knife pressing lifting units 34, which are respectively used to drive the lifting and lowering of two knife pressing blades 31. Further, the knife pressing lifting unit 34 includes a fixed plate 345, a first linear guide rail 346, a support plate 344 and a lifting power source. The support plate 344 is slidably connected to the fixed plate 345 along the vertical direction through the first linear guide rail 346. Specifically, the slide rail of the first linear guide rail 346 is fixed on the fixed plate 345, and the slider of the first linear guide rail 346 is fixed on the support plate 344. The knife pressing blade 31 is connected to the top of the support plate 344 through a knife pressing mounting block 33. Furthermore, the knife pressing power source includes a motor 341, a screw rod 342 and a ball nut 343. The ball nut 343 is fixedly connected to the support plate 344. The main shaft of the motor 341 is coaxially connected to the screw rod 342 through a coupling, so that when the main shaft of the motor 341 rotates, the screw rod 342 is driven to rotate. Due to the guidance and limitation of the first linear guide rail 346, the ball nut 343 is driven to move on the screw rod 342, and then the support plate 344 is driven to move up and down, and finally the knife pressing blade 31 is moved up and down, so as to complete the effect of the knife pressing blade 31 pressing the electrode sheet 1 during the lamination process.

[0030] In this embodiment, refer to Figure 2 and Figure 3 A buffer cylinder 35 is provided between the knife pressing mounting block 33 and the support plate 344, and the fixed end of the buffer cylinder 35 is mounted on the support plate 344, and the knife pressing mounting block 33 is fixed to the movable end of the buffer cylinder 35, so that when the support plate 344 is raised or lowered, the buffer cylinder 35 and the knife pressing blade 31 are raised or lowered synchronously, and when the knife pressing blade 31 is pressed on the pole piece 1 with an impact force, the buffer cylinder 35 can buffer the collision force when the knife pressing blade 31 presses the pole piece 1, thereby avoiding the knife pressing blade 31 or the pole piece 1 from being damaged when the knife pressing lifting unit 34 drives the knife pressing blade 31 to move too fast or exceeds the downward pressing stroke.

[0031] In this embodiment, refer to Figure 2 and Figure 3The press knife transverse movement unit 36 ​​includes a base 361, a second linear guide 362, a mounting seat 364 and a transverse movement power source. The mounting seat 364 is slidably connected to the base 361 along the horizontal direction through the second linear guide 362. The slide rail of the second linear guide 362 is fixed on the base 361. The slider of the second linear guide 362 is fixed on the mounting seat 364. The transverse movement power source is used to drive the mounting seat 364 to move left and right. Specifically, the movement power source includes a linear motor 363. The fixed end of the linear motor 363 is installed on the base 361, and the movable end of the linear motor 363 is fixedly connected to the mounting seat 364. The press knife lifting unit 34 is fixed on the mounting seat 364, so that when the horizontal moving force source drives the mounting seat 364 to move left and right, it drives the press knife lifting unit 34 to move left and right, and then drives the press knife blade 31 to move left and right, so that during the stacking process, the press knife blade 31 can move away from the stacking platform 2 to avoid the sheet feeding robot, or drive the press knife blade 31 to move toward the stacking to the top of the pole piece 1, so that the press knife lifting unit 34 can drive the press knife blade 31 to move downward to press the pole piece 1.

[0032] Furthermore, the mounting seat 364, the second linear guide rail 362 and the linear motor 363 each have two, the two second linear guide rails 362 are respectively mounted on both sides of the base 361, the two mounting seats 364 are respectively fixed on the sliders of the two second linear guide rails 362, the movable ends of the two linear motors 363 are respectively fixedly connected to the two mounting seats 364, and the two press blade lifting units 34 are respectively fixed on the two mounting seats 364. In this way, the two linear motors 363 respectively drive the two press blades 31 to move left and right, thereby improving the operability of the mechanism.

[0033] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A knife pressing mechanism, Features: It includes a pressing knife, a pressing knife lifting unit and a pressing knife transverse movement unit. The pressing knife lifting unit is used to drive the pressing knife to move in the vertical direction, and the pressing knife transverse movement unit is used to drive the pressing knife to move in the horizontal direction. The pressing knife includes two pressing blades arranged in parallel, and the inner sides of the two pressing blades are connected to the tab pressing sheets.

2. A knife pressing mechanism according to claim 1, Features: The pressing blade comprises a main body and a perspective portion. When the pressing blade presses the pole piece, the perspective portion is located directly above the corner of the pole piece.

3. A knife pressing mechanism according to claim 2, Features: The knife pressing lifting units include two, and the two knife pressing lifting units are respectively used to drive the lifting and lowering of two knife pressing blades. Each of the knife pressing lifting units includes a fixed plate, a support plate and a lifting power source. The support plate is slidably connected to the fixed plate along the vertical direction. The knife pressing blade is connected to the top of the support plate through a knife pressing mounting block. The knife pressing power source is used to drive the support plate to move up and down.

4. A knife pressing mechanism according to claim 3, Features: The support plate and the fixed plate are slidably connected via a first linear guide rail, a slide rail of the first linear guide rail is fixed on the fixed plate, and a slider of the first linear guide rail is fixed on the support plate.

5. A knife pressing mechanism according to claim 4, Features: The knife pressing power source comprises a motor, a screw rod and a ball nut, and the ball nut is fixedly connected to the support plate.

6. A knife pressing mechanism according to claim 3, Features: A buffer cylinder is arranged between the knife pressing mounting block and the support plate, the fixed end of the buffer cylinder is mounted on the support plate, the knife pressing mounting block is fixed to the movable end of the buffer cylinder, and the buffer cylinder is used to buffer the collision force when the knife pressing blade presses the electrode sheet.

7. A knife pressing mechanism according to claim 2, Features: The press knife transverse movement unit includes a base, a mounting seat and a transverse movement power source. The mounting seat is slidably connected to the base along the horizontal direction. The transverse movement power source is used to drive the mounting seat to move left and right. The press knife lifting unit is fixed on the mounting seat.

8. A knife pressing mechanism according to claim 7, Features: The mounting seat is slidably connected to the base via a second linear guide rail, a slide rail of the second linear guide rail is fixed on the base, and a slider of the second linear guide rail is fixed on the mounting seat.

9. A knife pressing mechanism according to claim 8, Features: The lateral motion power source comprises a linear motor, a fixed end of the linear motor is mounted on a base, and a movable end of the linear motor is fixedly connected to the mounting seat.

10. A stacking table, comprising a stacking table, Features: It also includes the knife pressing mechanism according to any one of claims 1 to 9, wherein the knife pressing mechanism comprises two knife pressing mechanisms, and the two knife pressing mechanisms are symmetrically arranged on both sides of the stacking platform.

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