Pole piece cutting device

Abstract

The utility model discloses a pole piece cutting device which comprises a rack, a first linear module, a second linear module, a cutting mechanism and a piece feeding mechanical arm, the first linear module is used for driving the piece feeding mechanical arm to move in the piece feeding direction, and the piece feeding mechanical arm is used for carrying pole pieces from a material taking position to a piece stacking position; the second linear module is used for driving the cutting mechanism to move from the initial cutting position to the remodeling cutting position, the moving direction of the cutting mechanism is parallel to the sheet feeding direction, and after the cutting mechanism moves to the remodeling cutting position, the position of the material taking position is not changed. The pole piece cutting device disclosed by the utility model can realize width-changing cutting of the pole piece under the condition that the position of the front end of the pole piece is inconvenient, and is simple in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a pole piece cutting device. Background Art

[0002] There are two main methods for forming lithium-ion battery cells: winding and stacking. When using the stacking method to produce lithium-ion electronic cells, the electrode strip needs to be cut into pieces, and then the electrode pieces are moved to the stacking table for stacking by a sheet feeding robot.

[0003] The existing cutting device for lithium battery pole pieces is relatively complicated to operate, and the position of the cutter is fixed, making it difficult to adjust the cutting of pole pieces of different sizes. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a pole piece cutting device, which can realize cutting of pole piece width change when the front end position of the pole piece is inconvenient.

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

[0006] A pole piece cutting device comprises a frame, a first linear module, a second linear module, a cutting mechanism and a film feeding robot, wherein the first linear module is used to drive the film feeding robot to move along the film feeding direction, and the film feeding robot is used to transport the pole piece from the material picking position to the stacking position; the second linear module is used to drive the cutting mechanism to move from the initial cutting position to the mold changing cutting position, and the movement direction of the cutting mechanism is parallel to the film feeding direction. After the cutting mechanism moves to the mold changing cutting position, the position of the material picking position remains unchanged.

[0007] As a further improvement of the above technical solution, the cutting mechanism is connected to the frame through a second linear module, the second linear module includes a linear guide and a driving unit, the cutting mechanism is slidably connected to the frame through the linear guide, and the driving unit is used to drive the cutting mechanism to move.

[0008] As a further improvement of the above technical solution, the driving unit includes a first motor and a screw module, the screw module includes a screw and a nut, the first motor is used to drive the screw to rotate, and the nut is fixedly connected to the cutting mechanism.

[0009] As a further improvement of the above technical solution, the cutting mechanism includes a cutting frame, a cutter and a cutter driving unit. The cutting frame is slidably connected to the frame through a linear guide rail, and the cutter driving unit is used to drive the cutter to open and close to cut the pole piece.

[0010] As a further improvement of the above technical solution, the cutter includes an upper cutter and a lower cutter, the lower cutter is fixed on the cutting frame, and the cutter driving unit is used to drive the upper cutter to approach or move away from the lower cutter.

[0011] As a further improvement of the above technical solution, the cutting mechanism includes a first cutting knife frame and a second cutting knife frame, the first cutting knife frame is fixedly connected to the cutting frame, a guide member is arranged between the first cutting knife frame and the second cutting knife frame, the second cutting knife frame is slidingly arranged based on the guide member, and the lower cutting knife and the upper cutting knife are respectively fixed to the first cutting knife frame and the second cutting knife frame.

[0012] As a further improvement of the above technical solution, the cutter drive unit includes a second motor fixed on the cutting frame, a cam mechanism is connected between the main shaft of the second motor and the second cutter frame, and the second motor drives the second cutter frame to move up and down through the cam mechanism.

[0013] As a further improvement of the above technical solution, the cam mechanism includes a fixed plate, a connecting plate, a cam and a protrusion, the fixed plate is fixedly connected to the cutting frame, the connecting plate is connected to the second cutting frame, the connecting plate is slidably connected to the fixed plate, the cam is fixedly mounted on the main shaft of the second motor, and the protrusion is connected to the connecting plate and is in sliding contact with the cam.

[0014] As a further improvement of the above technical solution, the cutting mechanism further includes a guiding structure, and the guiding structure includes a guiding groove. When the pole piece passes through the guiding groove, the guiding groove is used to guide and limit the pole piece.

[0015] As a further improvement of the above technical solution, the guide structure includes a first guide plate and a second guide plate, the first guide plate and the second guide plate are stacked in a vertical direction, and a gap is left between the first guide plate and the second guide plate to form the guide groove.

[0016] The beneficial effect of the utility model is that when producing cells of different sizes and the width of the cut pole piece needs to be changed, the driving unit drives the cutting frame to slide based on the linear guide rail, thereby adjusting the position of the cutting mechanism to cut the pole piece, thereby cutting pole pieces of different widths, and the structure is simple and easy to operate. In addition, after adjusting the position of the cutting mechanism, the front end position of the pole piece remains unchanged, which is convenient for the feeding robot to clamp the pole piece for feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of a pole piece cutting device of the utility model;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the cutter position;

[0020] Figure 3 It is a schematic diagram of the initial cutting position of a pole piece cutting device of the utility model;

[0021] Figure 4 It is a schematic diagram of a type-changing cutting position of a pole piece cutting device of the utility model.

[0022] Figure numerals: 1. Frame; 2. Second linear module; 3. Cutting mechanism; 31. Cutting frame; 32. First cutting knife frame; 33. Lower cutting knife; 34. Upper cutting knife; 35. Second cutting knife frame; 36. Cam mechanism; 37. Second motor; 38. Guide plate; 39. Guide member; 4. Film feeding robot; 5. First linear module. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, 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 formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0024] Reference Figure 1 , Figure 2A pole piece cutting device comprises a frame 1, a first linear module 5, a second linear module 2, a cutting mechanism 3 and a film feeding robot 4, wherein the first linear module 5 can be in the form of a combination of a linear motor and a first linear guide rail, and is used to drive the film feeding robot 4 to move along a film feeding direction, wherein the film feeding direction refers to the pole piece moving from a material picking position (the position of the pole piece after cutting) to a stacking position (the position where the pole piece moves to a stacking table) along a straight line, and the film feeding robot 4 is used to transport the pole piece from the material picking position (the position of the pole piece after cutting) to the stacking position (stacking table). The second linear module 2 is used to drive the cutting mechanism 3 to move from the initial cutting position (the cutting position before the pole piece width is changed) to the changing cutting position (the cutting position after the pole piece width is changed). The movement direction of the cutting mechanism 3 is parallel to the feeding direction. After the cutting mechanism 3 moves to the changing cutting position, the position of the material picking position remains unchanged, that is, the cutting mechanism 3 has at least two states before and after the pole piece width is changed. The cutting mechanism 3 is in the first state when it is used to cut the pole piece before the width is changed (the pole piece width is X), and the cutting mechanism 3 is in the second state when it is used to cut the pole piece after the width is changed (the pole piece width is Y). Regardless of whether the cutting mechanism 3 is in the first state or the second state, the position of the material picking position relative to the stacking table remains unchanged, so that the action and stroke of the feeding robot 4 for transporting the pole piece remain unchanged, and there is no need to debug the control program of the feeding robot 4, which is convenient for pole piece feeding and stacking.

[0025] Specifically, the cutting mechanism 3 is connected to the frame 1 through a second linear module 2, the second linear module 2 includes a second linear guide and a driving unit, the cutting mechanism 3 is slidably connected to the frame 1 through the second linear guide, the driving unit includes a first motor and a screw module, the screw module includes a screw and a nut, the first motor is used to drive the screw to rotate, the nut is fixedly connected to the cutting mechanism 3, when the first motor is running, it drives the screw to rotate, and under the guidance of the second linear guide, drives the cutting mechanism 3 to move.

[0026] Reference Figure 3 and Figure 4 The process of changing the shape is as follows: the cutting mechanism 3 cuts the electrode piece with a width of X at the initial cutting position. When the electrode piece needs to be changed, the first motor drives the lead screw to rotate, thereby driving the cutting mechanism 3 to move a certain distance, that is, the cutting position of the cutting mechanism 3 moves to the changing cutting position. The cutting mechanism 3 cuts the electrode piece with a width of Y at the changing cutting position, and the front end position of the electrode piece remains unchanged before and after the changing (refer to Figure 3 and Figure 4 The front end position standard line Z in the figure), therefore, the utility model can cut pole pieces of different sizes, and has a simple structure and is easy to operate. In addition, the front end position of the pole piece remains unchanged after cutting, which facilitates the feeding robot 4 to feed the pole piece as usual, reducing additional debugging work.

[0027] In this embodiment, refer to Figure 1 The cutting mechanism 3 includes a cutting frame 31, a cutter and a cutter driving unit. The cutting frame 31 is slidably connected to the frame 1 through a second linear guide rail. The cutter includes an upper cutter 34 and a lower cutter 33. The cutting mechanism 3 also includes a first cutter frame 32 and a second cutter frame 35. The first cutter frame 32 is fixedly mounted on the cutting frame 31, and the lower cutter 33 is fixedly mounted on the first cutter frame 32. A guide member 39 is provided between the first cutter frame 32 and the second cutter frame 35. The second cutter frame 35 is based on the The guide member 39 is slidably arranged. Specifically, the guide member 39 includes a guide rod fixedly connected to the first cutting frame 32 and a guide sleeve fixedly connected to the second cutting frame 35. The guide sleeve slides on the guide rod to realize the movement of the second cutting frame 35. In addition, the cutter driving unit includes a second motor 37 fixed to the cutting frame 31. A cam mechanism 36 is connected between the main shaft of the second motor 37 and the second cutting frame 35. The second motor 37 drives the second cutting frame 35 to move up and down through the cam mechanism 36.

[0028] Furthermore, the cam mechanism 36 includes a fixed plate, a third linear guide, a connecting plate, a cam and a protrusion. The fixed plate is specified to be connected to the cutting frame 31. The connecting plate and the fixed plate are slidably connected by the third linear guide. The connecting plate is snap-fit ​​fixedly connected to the second cutting frame 35. The cam is fixedly installed on the main shaft of the second motor 37. The protrusion is connected to the connecting plate and is in sliding contact with the cam, so that when the main shaft of the second motor 37 rotates, the cam is driven to rotate. Under the cooperation of the cam and the protrusion, the connecting plate is driven to move up and down, and then the second cutting frame 35 is driven to move up and down, so that the upper cutter 34 approaches or moves away from the lower cutter 33. When the upper cutter 34 moves close to the lower cutter 33, the two are staggered to generate shear force to cut the pole piece.

[0029] Furthermore, the cutting mechanism 3 further includes a guide structure, and the guide structure includes a guide groove, and when the pole piece passes through the guide groove, the guide groove is used to guide and limit the pole piece. Specifically, the guide structure includes two guide plates 38 stacked up and down, and the two guide plates 38 are respectively marked as a first guide plate and a second guide plate, and there is a gap between the first guide plate and the second guide plate for the pole piece to pass through, and the gap forms the guide groove, and the gap is convenient for guiding the pole piece, and can also limit the pole piece when cutting the pole piece to avoid deformation of the pole piece.

[0030] 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 pole piece cutting device, Features: It includes a frame, a first linear module, a second linear module, a cutting mechanism and a film feeding robot. The first linear module is used to drive the film feeding robot to move along the film feeding direction, and the film feeding robot is used to transport the pole piece from the material picking position to the stacking position; the second linear module is used to drive the cutting mechanism to move from the initial cutting position to the mold changing cutting position. The movement direction of the cutting mechanism is parallel to the film feeding direction. After the cutting mechanism moves to the mold changing cutting position, the position of the material picking position remains unchanged.

2. A pole piece cutting device according to claim 1, Features: The cutting mechanism is connected to the frame via a second linear module, the second linear module comprises a linear guide rail and a driving unit, the cutting mechanism is slidably connected to the frame via the linear guide rail, and the driving unit is used to drive the cutting mechanism to move.

3. A pole piece cutting device according to claim 2, Features: The driving unit includes a first motor and a lead screw module, the lead screw module includes a lead screw and a nut, the first motor is used to drive the lead screw to rotate, and the nut is fixedly connected to the cutting mechanism.

4. A pole piece cutting device according to claim 3, Features: The cutting mechanism comprises a cutting frame, a cutter and a cutter driving unit. The cutting frame is slidably connected to the frame via a linear guide rail, and the cutter driving unit is used to drive the cutter to open and close to cut the pole piece.

5. A pole piece cutting device according to claim 4, Features: The cutter comprises an upper cutter and a lower cutter, the lower cutter is fixed on the cutting frame, and the cutter driving unit is used for driving the upper cutter to approach or move away from the lower cutter.

6. A pole piece cutting device according to claim 5, Features: The cutting mechanism includes a first cutting knife frame and a second cutting knife frame, the first cutting knife frame is fixedly connected to the cutting frame, a guide member is arranged between the first cutting knife frame and the second cutting knife frame, the second cutting knife frame is slidably arranged based on the guide member, and the lower cutting knife and the upper cutting knife are respectively fixed to the first cutting knife frame and the second cutting knife frame.

7. A pole piece cutting device according to claim 6, Features: The cutter driving unit comprises a second motor fixed on the cutting frame, a cam mechanism is connected between the main shaft of the second motor and the second cutter frame, and the second motor drives the second cutter frame to move up and down through the cam mechanism.

8. A pole piece cutting device according to claim 7, Features: The cam mechanism includes a fixed plate, a connecting plate, a cam and a protrusion, the fixed plate is fixedly connected to the cutting frame, the connecting plate is connected to the second cutting frame, the connecting plate is slidably connected to the fixed plate, the cam is fixedly installed on the main shaft of the second motor, and the protrusion is connected to the connecting plate and is in sliding contact with the cam.

9. A pole piece cutting device according to any one of claims 4 to 8, Features: The cutting mechanism further comprises a guiding structure, wherein the guiding structure comprises a guiding groove, and when the pole piece passes through the guiding groove, the guiding groove is used to guide and limit the pole piece.

10. A pole piece cutting device according to claim 9, Features: The guide structure includes a first guide plate and a second guide plate, wherein the first guide plate and the second guide plate are stacked in a vertical direction, and a gap is left between the first guide plate and the second guide plate to form the guide groove.

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