Composite sheet diaphragm roll cutting mechanism of thermal composite lamination machine

Abstract

The utility model discloses a composite sheet diaphragm roll cutting mechanism of a thermal composite laminating machine, which comprises a fixing frame, a first servo motor, a second servo motor, a roll assembly and a cutter assembly, and the roll assembly and the cutter assembly are oppositely arranged in the fixing frame. The cutter assembly comprises a second roller body, a cutter, a cutter mounting cavity, a heating rod mounting cavity, a heating rod, a first elastic device and a second elastic device, the first roller body and the second roller body are arranged in the fixing frame in a relatively rotating mode, and the first servo motor and the second servo motor are arranged on one side of the fixing frame; a first nylon protruding block and a second nylon protruding block are arranged at the positions, corresponding to the first elastic device and the second elastic device, of the cutter installation cavity respectively, and a first fixing block and a second fixing block corresponding to the first nylon protruding block and the second nylon protruding block respectively are arranged on one inner side wall of the fixing frame. According to the diaphragm cutting device, the cutting position of the diaphragm can be positioned, the diaphragm is fixed during cutting, and the phenomenon of cutting deviation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a composite sheet diaphragm roller cutting mechanism for a hot composite stacking machine. Background Art

[0002] The performance of lithium battery diaphragm determines the interface structure and internal resistance of the battery, directly affecting the battery's capacity, cycle and safety performance. A diaphragm with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short-circuiting. The diaphragm material is non-conductive, and its physical and chemical properties have a great influence on the performance of the battery. For lithium battery series, since the electrolyte is an organic solvent system, an organic solvent-resistant diaphragm material is required, and a high-strength thin film polyolefin porous membrane is generally used. After the pole piece and the diaphragm are combined into a composite pole piece, they need to be sent to the stacking table for stacking to make a battery cell. After the battery cell is stacked, the diaphragm needs to be cut. The problem with the prior art is that the existing diaphragm cutting mechanism cannot position and fix the cutting position of the diaphragm, and it is easy to offset during cutting, which affects the cutting quality of the diaphragm. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a composite sheet diaphragm roller cutting mechanism for a hot composite lamination machine.

[0004] The technical solution of the utility model is as follows:

[0005] A composite sheet diaphragm roller cutting mechanism for a hot composite lamination machine comprises a fixed frame, a first servo motor, a second servo motor, and a roller assembly and a cutter assembly relatively arranged in the fixed frame, the roller assembly comprising a first roller body and a silicone strip, the cutter assembly comprising a second roller body, a cutter, a cutter mounting cavity, a heating rod mounting cavity, a heating rod, a first elastic device and a second elastic device, the first roller body and the second roller body are relatively rotatably arranged in the fixed frame, the composite pole piece passes between the first roller body and the second roller body, the first servo motor and the second servo motor are arranged on one side of the fixed frame, the output end of the first servo motor is transmission-connected to one end of the first roller body, the output end of the second servo motor is transmission-connected to one end of the second roller body, the other end of the second roller body extends out of the fixed frame and is connected to a conductive slip ring, the silicone strip is arranged on the first roller body along the roller shaft, the surface of the silicone strip is provided with a long groove, the cutter mounting cavity is provided with a first elastic device and a second elastic device at both ends Two elastic devices are movably arranged in the second roller body, the heating rod mounting cavity is arranged in the cutter mounting cavity, the heating rod is arranged in the heating rod mounting cavity, the surface of the cutter mounting cavity is provided with a long and thin knife groove parallel to the silicone strip, the cutter is inserted in the long and thin knife groove on the surface of the cutter mounting cavity, the cutter and the cutter mounting cavity are away from the first roller body under the elastic action of the first elastic device and the second elastic device, the positions of the cutter mounting cavity corresponding to the first elastic device and the second elastic device are respectively provided with a first nylon protrusion and a second nylon protrusion, an inner side wall of the fixing frame is provided with a first fixed block and a second fixed block respectively corresponding to the first nylon protrusion and the second nylon protrusion, when the first nylon protrusion and the second nylon protrusion collide with the first fixed block and the second fixed block during the rotation of the second roller body, the first elastic device and the second elastic device are compressed to make the cutter close to the first roller body and inserted into the long groove of the silicone strip to cut off the diaphragm of the composite electrode.

[0006] Furthermore, the roller assembly also includes a first jig and a second jig, and the first jig and the second jig are detachably placed between the two ends of the first roller body and the fixing frame for rotational positioning.

[0007] Furthermore, the first servo motor is drivingly connected to the first roller body via a first reducer and a first commutator, and the second servo motor is drivingly connected to the second roller body via a second reducer and a second commutator.

[0008] Furthermore, the first elastic device and the second elastic device both include a linear bearing, a guide shaft and a compression spring, the linear bearing is arranged in the second roller body, the guide shaft is movably arranged in the linear bearing, the end of the guide shaft is connected to the cutter mounting cavity, and the compression spring is sleeved outside the guide shaft and located between the cutter mounting cavity and the second roller body.

[0009] Furthermore, the cutter is detachably inserted into a long and thin knife groove on the surface of the cutter installation cavity and supported by a top screw.

[0010] Compared with the prior art, the beneficial effect of the utility model is that the utility model can locate the cutting position of the diaphragm, fix the diaphragm during cutting, and will not cause cutting deviation, thereby ensuring the cutting quality of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of the structure of a composite sheet diaphragm roller cutting mechanism of a hot composite lamination machine provided by the utility model;

[0013] Figure 2 The structure of the roller assembly of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 3 The structure of the roller assembly of the utility model is shown in FIG. Figure 2 ;

[0015] Figure 4 This is a schematic diagram of the structure of the cutter assembly of the utility model;

[0016] Figure 5 This is a structural sectional view of the cutter assembly of the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0019] Example

[0020] See also Figures 1 to 5The present embodiment provides a composite sheet diaphragm roller cutting mechanism for a thermal composite lamination machine, which is applied to the thermal composite lamination machine. After the lamination table is stacked into a battery cell, the diaphragm is cut off. The mechanism comprises a fixed frame 1, a first servo motor 2, a second servo motor 3, and a roller assembly 4 and a cutter assembly 5 relatively arranged in the fixed frame 1. The roller assembly 4 comprises a first roller body 41, a silicone strip 42, a first fixture 43 and a second fixture 44. The cutter assembly 5 comprises a second roller body 51, a cutter 52, a cutter mounting cavity 53, a heating rod mounting cavity 54, a heating rod 55, a first elastic device 56 and a second elastic device 57. The first roller body 41 and the second roller body 51 are relatively rotatably arranged in the fixed frame 1, the composite pole piece passes between the first roller body 41 and the second roller body 51, the first servo motor 2 and the second servo motor 3 are arranged on one side of the fixed frame 1, the output end of the first servo motor 2 is connected to one end of the first roller body 41 through the first reducer 6 and the first commutator 7, the output end of the second servo motor 3 is connected to one end of the second roller body 51 through the second reducer 8 and the second commutator 9, and the other end of the second roller body 51 extends out of the fixed frame 1 and is connected to a conductive slip ring 10. The silicone strip 42 is arranged on the first roller body 41 along the roller axis, and the surface of the silicone strip 42 is provided with a long groove 421. The first fixture 43 and the second fixture 44 are detachably placed between the two ends of the first roller body 41 and the fixed frame 1 for rotational positioning. When working, the first fixture 43 and the second fixture 44 are removed. The cutter mounting cavity 53 is movably arranged in the second roller body 51 through the first elastic device 56 and the second elastic device 57 at both ends, the heating rod mounting cavity 54 is arranged in the cutter mounting cavity 53, and the heating rod 55 is arranged in the heating rod mounting cavity 54. Preferably, a heat insulation plate is arranged between the heating rod mounting cavity 54 and the cutter mounting cavity 53, and the surface of the cutter mounting cavity 53 is provided with a long and thin knife groove parallel to the silicone strip 42. The cutter 52 is detachably inserted in the long and thin knife groove on the surface of the cutter mounting cavity 53 and supported by a top screw. When the cutter 52 is replaced, the top screw is loosened to realize quick replacement of the cutter 52. The cutter 52 and the cutter mounting cavity 53 are moved away from the first roller body 41 under the elastic action of the first elastic device 56 and the second elastic device 57. The positions of the cutter mounting cavity 53 corresponding to the first elastic device 56 and the second elastic device 57 are respectively provided with the first nylon protrusion 58 and the second nylon protrusion 59. An inner side wall of the fixing frame 1 is provided with the first fixing block 11 and the second fixing block 12 corresponding to the first nylon protrusion 58 and the second nylon protrusion 59 respectively. When the first nylon protrusion 58 and the second nylon protrusion 59 collide with the first fixing block 11 and the second fixing block 12 during the rotation of the second roller body 51, the first elastic device 56 and the second elastic device 57 are compressed to make the cutter 52 close to the first roller body 41 and inserted into the long groove 421 of the silicone strip 42 to cut off the diaphragm of the composite electrode.

[0021] Among them, the first elastic device 56 and the second elastic device 57 both include a linear bearing 561, a guide shaft 562 and a compression spring 563, the linear bearing 561 is arranged in the second roller body 51, the guide shaft 562 is movably arranged in the linear bearing 561, the end of the guide shaft 562 is connected to the cutter mounting cavity 53, and the compression spring 563 is sleeved outside the guide shaft 562 and is located between the cutter mounting cavity 53 and the second roller body 51.

[0022] Working principle:

[0023] At the beginning, align the cutter 52 with the long groove 421 of the silicone strip 42, and after alignment, remove the first fixture 43 and the second fixture 44. Under the action of the compression spring 563, the cutter 52 does not contact the silicone strip 42, and there is a gap. The composite pole piece passes between the first roller body 41 and the second roller body 51. When cutting the diaphragm, the second servo motor 3 drives the second roller body 51 to rotate. When the first nylon protrusion 58 and the second nylon protrusion 59 collide with the first fixed block 11 and the second fixed block 12, the compression spring 563 is compressed to make the cutter 52 extend and insert into the long groove 421 of the silicone strip 42 to cut the diaphragm. After the diaphragm is cut, the second roller body 51 continues to rotate, the first nylon protrusion 58 and the second nylon protrusion 59 pass over the first fixed block 11 and the second fixed block 12, and the compression spring 563 is reset to retract the cutter 52.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite sheet diaphragm roller cutting mechanism for a hot composite lamination machine, characterized in that: It includes a fixed frame, a first servo motor, a second servo motor, and a roller assembly and a cutter assembly relatively arranged in the fixed frame, the roller assembly includes a first roller body and a silicone strip, the cutter assembly includes a second roller body, a cutter, a cutter mounting cavity, a heating rod mounting cavity, a heating rod, a first elastic device and a second elastic device, the first roller body and the second roller body are relatively rotatably arranged in the fixed frame, the composite pole piece passes between the first roller body and the second roller body, the first servo motor and the second servo motor are arranged on one side of the fixed frame, the output end of the first servo motor is transmission-connected to one end of the first roller body, the output end of the second servo motor is transmission-connected to one end of the second roller body, the other end of the second roller body extends out of the fixed frame and is connected with a conductive slip ring, the silicone strip is arranged on the first roller body along the roller shaft, the surface of the silicone strip is provided with a long groove, and the cutter mounting cavity is movably arranged through the first elastic device and the second elastic device at both ends In the second roller body, the heating rod mounting cavity is arranged in the cutter mounting cavity, the heating rod is arranged in the heating rod mounting cavity, the surface of the cutter mounting cavity is provided with a long and thin knife groove parallel to the silicone strip, the cutter is inserted in the long and thin knife groove on the surface of the cutter mounting cavity, the cutter and the cutter mounting cavity are away from the first roller body under the elastic action of the first elastic device and the second elastic device, the positions of the cutter mounting cavity corresponding to the first elastic device and the second elastic device are respectively provided with the first nylon protrusion and the second nylon protrusion, an inner side wall of the fixing frame is provided with the first fixed block and the second fixed block respectively corresponding to the first nylon protrusion and the second nylon protrusion, when the first nylon protrusion and the second nylon protrusion collide with the first fixed block and the second fixed block during the rotation of the second roller body, the first elastic device and the second elastic device are compressed to make the cutter close to the first roller body and inserted into the long groove of the silicone strip to cut off the diaphragm of the composite electrode.

2. The composite sheet diaphragm roller cutting mechanism of the hot composite lamination machine according to claim 1, characterized in that: The roller assembly further comprises a first jig and a second jig, wherein the first jig and the second jig are detachably placed between two ends of the first roller body and a fixing frame for rotational positioning.

3. The composite sheet diaphragm roller cutting mechanism of the hot composite lamination machine according to claim 1 is characterized in that: The first servo motor is drivingly connected to the first roller body through a first reducer and a first commutator, and the second servo motor is drivingly connected to the second roller body through a second reducer and a second commutator.

4. The composite sheet diaphragm roller cutting mechanism of the hot composite lamination machine according to claim 1 is characterized in that: The first elastic device and the second elastic device both include a linear bearing, a guide shaft and a compression spring. The linear bearing is arranged in the second roller body, and the guide shaft is movably arranged in the linear bearing. The end of the guide shaft is connected to the cutter mounting cavity, and the compression spring is sleeved outside the guide shaft and located between the cutter mounting cavity and the second roller body.

5. The composite sheet diaphragm roller cutting mechanism of the hot composite lamination machine according to claim 1, characterized in that: The cutter is detachably inserted into a long and thin cutter groove on the surface of the cutter installation cavity and supported by a top screw.

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