Lithium battery diaphragm traction device

Abstract

The utility model provides a lithium battery diaphragm traction device, and belongs to the technical field of lithium battery diaphragm production. The system comprises at least one front conveying roller, an edge cutting roller and at least one rear conveying roller which are sequentially arranged on a supporting base. A waste edge film cutter assembly is arranged at the position, corresponding to the edge cutting roller, of the supporting base. A sliding table moving device is fixedly connected to the lower portion of the supporting base and used for driving the supporting base to move. According to the system, the edge cutting rollers and the corresponding telescopic cutters are arranged between the transmission rollers, and the rotating rollers and the sliding table moving device are combined, so that the edge cutting accuracy of the diaphragm is ensured, the cutters are not broken, and the diaphragm is not torn; meanwhile, the equipment is easy to operate and runs fully automatically, the reliability and continuity in the production process are guaranteed, the safety coefficient is increased, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragm production, in particular to a lithium battery diaphragm traction device. Background Art

[0002] In recent years, lithium-ion batteries have been widely used in smart phones, tablets, smart wearables, power tools and electric vehicles.

[0003] Lithium-ion batteries have the characteristics of high energy density, long cycle life, no memory effect and green environmental protection. As energy storage devices, they are widely used in consumer electronics and power tools. With the widespread application of lithium-ion batteries, consumers' demand for the use environment and demand for lithium-ion batteries continues to increase, which requires lithium-ion batteries to have high safety while taking into account high and low temperature performance, while the cost requirements continue to decrease. As an important component of lithium-ion batteries, battery separators determine the interface structure and internal resistance of the battery, which directly affects the battery's cycle, capacity and safety performance.

[0004] During the diaphragm production process, waste membranes that cannot be used in the subsequent processes will be generated at both ends of the diaphragm after the previous process. If the waste membranes enter the subsequent processes, it will cause too much untreated waste membranes to accumulate in the equipment, causing the membranes to break easily or fail to operate normally during the operation of the equipment. Therefore, they need to be stably cut off and collected in time.

[0005] In view of this, this application is hereby filed. Utility Model Content

[0006] The utility model aims to provide a lithium battery diaphragm traction device, which can trim, pull, and extract waste edges of the diaphragm, thereby improving production efficiency and equipment operation stability and extending equipment operation time.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A lithium battery diaphragm traction device comprises at least one front transmission roller, a trimming roller and at least one rear transmission roller which are sequentially arranged on a support seat; a waste film cutter assembly is provided on the support seat at a position corresponding to the trimming roller; a slide moving device is connected below the support seat for driving the support seat to move.

[0009] The slide moving device can make the whole traction device move axially, adjust the position with the front and rear processes, and can also tighten the diaphragm to facilitate the traction and trimming operations.

[0010] Preferably, the waste film cutting knife assembly is divided into two groups, which correspond to different radial directions of the trimming roller, that is, double-station trimming can be realized, and one group can be used normally when the knife is changed, without affecting the normal operation of the equipment.

[0011] Furthermore, each group of the waste edge film cutter assembly includes cutters corresponding to the two ends of the trimming roller and a telescopic mechanism arranged on the support seat; the cutters are driven by the telescopic mechanism to contact or separate from the trimming roller.

[0012] Preferably, the telescopic mechanisms are connected to the support seat via a slide assembly, so that the telescopic mechanisms can move along the axial direction of the trimming roller.

[0013] More preferably, the telescopic mechanism is a telescopic assembly driven by a cylinder, and the extension and withdrawal of the cutter are controlled by the cylinder.

[0014] Preferably, a knife groove is provided on the trimming roller at a position corresponding to the cutter, which can match the cutter to ensure that the waste edge of the diaphragm can be cut off without breaking the knife or tearing the diaphragm.

[0015] More preferably, the trimming roller is provided with a plurality of parallel knife grooves to accommodate different trimming widths.

[0016] Furthermore, a waste edge exporting assembly is provided on the support seat for exporting and collecting the waste edges cut off by the waste edge film cutter assembly.

[0017] Preferably, a rotating roller assembly is further provided upstream of the front transport roller to flatten and compact the diaphragm.

[0018] Preferably, when there are a plurality of the at least one rear transfer roller, a film pressing roller is further provided between the plurality of rear transfer rollers.

[0019] Compared with the prior art, the lithium battery diaphragm pulling device of the utility model adopts a trimming roller and a corresponding telescopic cutter arranged between the transmission rollers, combined with a rotating roller and a sliding table moving device, to ensure the accuracy of the diaphragm trimming without breaking the cutter or tearing the diaphragm. At the same time, the equipment is easy to operate and fully automated, ensuring the reliability and continuity of the production process, and improving the safety factor and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the axial structure of the lithium battery diaphragm traction device of the utility model.

[0022] Description of reference numerals:

[0023] 1. Rotating roller assembly; 2. Driving motor; 3. Front transmission roller; 4. Trimming roller; 5. Waste edge film cutter assembly; 6. Waste edge lead-out assembly; 7. Support seat; 8. Film pressing roller; 9. Slide moving device; 10. Rear transmission roller. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] Example 1

[0026] A lithium battery diaphragm traction device, such as Figure 1 As shown, it includes at least one front transmission roller 3, a trimming roller 4 and at least one rear transmission roller 10 which are arranged in sequence on the support seat 7; a waste film cutter assembly 5 is provided at the position of the support seat 7 corresponding to the trimming roller 4; a slide moving device 9 is connected below the support seat 7 to drive the support seat 7 to move.

[0027] The front conveying roller 3, the trimming roller 4, and the rear conveying roller 10 are all driven to rotate by the driving motor 2. The supporting seat 7 can support and bear the front conveying roller 3, the trimming roller 4, the rear conveying roller 10 and the driving motor 2. The slide moving device 9 can make the whole set of traction device move axially, adjust the position with the front and rear processes, and can also tighten the diaphragm to facilitate the traction and trimming operations.

[0028] In this embodiment, there is one front transport roller 3 and three rear transport rollers 10 .

[0029] In this embodiment, there are two groups of waste film cutting knife assemblies 5, which correspond to different radial directions of the trimming roller 4 respectively. When one group is changing the knife, the other group can be used normally without affecting the normal operation of the equipment.

[0030] In this embodiment, each set of waste film cutter assembly 5 includes cutters corresponding to the two ends of the trimming roller 4 and a telescopic mechanism provided on the support seat 7; the cutters are driven by the telescopic mechanism to contact or separate from the trimming roller 4. The telescopic mechanisms are connected to the support seat 7 through a slide assembly so that the telescopic mechanisms can move along the axial direction of the trimming roller 4, so that different trimming widths can be adjusted. The telescopic mechanism is a telescopic assembly driven by a cylinder, and the extension and withdrawal of the cutter is controlled by the cylinder.

[0031] In some preferred implementations of this embodiment, a knife groove ( Figure 1 ), can be matched with the cutter to ensure that the waste edge of the diaphragm can be removed without breaking the knife and tearing the diaphragm.

[0032] In some more preferred implementations of the present embodiment, a plurality of parallel knife grooves may be provided on the trimming roller 4 so as to cooperate with the telescopic mechanism and the cutter that move axially to adapt to different trimming widths.

[0033] In this embodiment, a waste edge leading-out assembly 6 is further provided on the support seat 7 for leading out and collecting the waste edges cut off by the waste edge film cutting knife assembly 5 .

[0034] In this embodiment, a rotating roller assembly 1 is further provided upstream of the front transport roller 3 to flatten and compress the diaphragm. Figure 1 A film pressing roller 8 is also provided between the two rear transfer rollers 10 to flatten the film, which is beneficial to the flatness of the film entering the subsequent process. The rotating roller assembly 1 is a device that opens or closes the upper and lower rotating rollers through a rotating cylinder, and can rotate and press and flatten the diaphragm from the previous process.

[0035] When the diaphragm enters, the rotating roller assembly 1 at the entrance closes to clamp the two ends of the diaphragm, flattening and pressing the film. The diaphragm follows the route of the film in the device. First, the diaphragm passes through the front conveying roller 3 and then enters the trimming roller 4 below. The waste edge film cutter assembly 5 is used for trimming. The cut waste edge is exported and collected through the waste edge export assembly 6. Then the diaphragm passes through the three rear conveying rollers and is flattened by the film pressing roller 8 before entering the equipment of the subsequent process. When the diaphragm still cannot be tightened and flattened under the drive of the rotating roller assembly 1, the front conveying roller 3, the trimming roller 4, the rear conveying roller 10 and the film pressing roller 8, the slide moving device 9 can drive the support seat 7 to move, further tighten and flatten the diaphragm state, so as to facilitate the traction and trimming operations of the diaphragm.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "an example", "some examples", "preferred embodiments", "specific examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0037] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A lithium battery diaphragm pulling device, characterized in that: It includes at least one front transmission roller, a trimming roller and at least one rear transmission roller which are sequentially arranged on a support seat; a waste film cutter assembly is provided on the support seat at a position corresponding to the trimming roller; a slide moving device is connected below the support seat for driving the support seat to move.

2. The lithium battery diaphragm pulling device according to claim 1, characterized in that: The waste edge film cutting knife components are divided into two groups, which correspond to different radial directions of the trimming roller respectively.

3. The lithium battery diaphragm pulling device according to claim 2, characterized in that: Each group of the waste film cutting knife assemblies comprises cutting knives corresponding to the two ends of the trimming roller and a telescopic mechanism arranged on the support seat; the cutting knives are driven by the telescopic mechanism to contact or separate from the trimming roller.

4. The lithium battery diaphragm pulling device according to claim 3, characterized in that: The telescopic mechanisms are connected to the support seat through a slide assembly so that the telescopic mechanisms can move along the axial direction of the trimming roller.

5. The lithium battery diaphragm pulling device according to claim 3 or 4, characterized in that: The telescopic mechanism is a telescopic component driven by a cylinder.

6. The lithium battery diaphragm pulling device according to claim 3, characterized in that: A knife groove is provided on the trimming roller at a position corresponding to the cutting knife.

7. The lithium battery diaphragm pulling device according to claim 6, characterized in that: The trimming roller is provided with a plurality of parallel knife grooves to adapt to different trimming widths.

8. The lithium battery diaphragm pulling device according to claim 1, characterized in that: The support seat is also provided with a waste edge leading-out assembly for leading out and collecting the waste edges cut off by the waste edge film cutting knife assembly.

9. The lithium battery diaphragm pulling device according to claim 1, characterized in that: A rotating roller assembly is also provided upstream of the front transport roller to flatten and compact the diaphragm.

10. The lithium battery diaphragm pulling device according to claim 1, characterized in that: When there are multiple rear transfer rollers, a lamination roller is further provided between the multiple rear transfer rollers.

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