A lithium battery separator trimming device

Abstract

The utility model discloses a lithium battery diaphragm edge cutting device, including two stand and two support column, install first horizontal roller on the stand, this first horizontal roller is used for leading out the edge material of cutting and conveying the flow -casting membrane piece, be equipped with the connecting roller between two support columns, be equipped with two adjusting snap ring on the outer periphery of connecting roller, install fastener on two adjusting snap ring all, be used for locking adjusting snap ring and the connection of connecting roller, and install cutter head on two adjusting snap ring all. The utility model discloses simple structure, through the cooperation of adjusting snap ring, connecting roller and fastener, can flexible adjustment the distance between cutter head, effectively cut off the flow -casting membrane edge material, thereby narrow width, promote lithium battery diaphragm in TD direction's tensile ratio and puncture strength, reduce rotten side to the interference of proofing effect simultaneously, and the simple structure easy to use, strong adaptability, the performance, efficiency and quality of diaphragm proofing have been optimized significantly, compared with the mode of custom mould head and replacement, the experimental efficiency has been improved greatly.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery separator processing equipment, specifically a lithium battery separator edge cutting device. Background Technology

[0002] As a core energy storage device in the new energy field, the performance of lithium-ion batteries largely depends on the separator, one of the four key materials. The separator not only determines the battery's interface structure and internal resistance, but also directly affects the battery's capacity, cycle life, and safety performance. Currently, high-end power battery separators are generally prepared using a wet process, which is based on thermally induced phase separation: polyethylene (PE) is blended with a high-boiling-point pore-forming agent (such as white oil) and then extruded and cast into a film. Subsequently, through steps such as cooling-induced phase separation, biaxial stretching, and extraction elution, a porous separator with a uniform microporous structure is formed.

[0003] However, in the sample making and performance verification stages, in order to improve the puncture strength of the separator, it is usually necessary to increase the transverse stretch ratio. However, the stretch ratio is directly related to the separator width. If a customized die head is used and the equipment is installed and debugged to adapt to the sample making requirements, it will consume a lot of time. In addition, during the casting process, due to uneven phase separation or differences in edge cooling rate, defects such as irregular edges and broken edges often occur. At the same time, the white oil that is not fully cured inside the cast film is easy to precipitate and adhere to the roller surface during subsequent transportation, causing the film surface to slip, which in turn causes tension fluctuations, deviation, or even detachment and other process problems, seriously affecting the stability and production efficiency of separator prototyping. Therefore, a lithium battery separator edge cutting device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a lithium battery separator trimming device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery separator edge cutting device, comprising two columns and two support columns, wherein a first horizontal roller is installed on the columns, the first horizontal roller being used to discharge the cut edge material and convey the cast film, a connecting roller is provided between the two support columns, and two adjusting rings are provided on the outer circumferential surface of the connecting roller, both adjusting rings being equipped with fasteners for locking the connection between the adjusting rings and the connecting rollers, and both adjusting rings being equipped with a cutter disc for cutting off the side edges of the cast film.

[0006] As a further embodiment of this utility model: each of the two support columns is equipped with a movable retaining ring, and each of the two movable retaining rings is equipped with a fastener for locking the connection between the movable retaining ring and the support column. An oil removal roller is provided between the two movable retaining rings for scraping off the white oil precipitated on the surface of the cast film.

[0007] As a further embodiment of this utility model: both ends of the degreasing roller are connected to two movable retaining rings through a tension mechanism. The tension mechanism includes a sleeve mounted on the movable retaining rings and a movable block disposed inside the sleeve. A spring connected to the inner wall of the sleeve is installed at the end of the movable block located inside the sleeve. A pin is provided on the outer circumferential surface of the sleeve.

[0008] As a further aspect of this utility model, the movable block is provided with a plurality of insertion holes that are adapted to the end of the pin.

[0009] As a further embodiment of this utility model: it further includes a base, on which the two uprights and two support columns are mounted, and a sensor is installed on the base, the sensor being connected to the degreasing roller.

[0010] As a further embodiment of this utility model: the two support columns are connected by a second horizontal roller, and the second horizontal roller is disposed below the connecting roller.

[0011] As a further embodiment of this utility model: the cutter disc includes a cutter arm and four sets of ceramic blades installed at the end of the cutter arm, and the other end of the cutter arm is connected to an adjusting retaining ring.

[0012] As a further embodiment of this utility model, the fastener is a bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This application, through the coordinated operation of the retaining ring, connecting roller, and fasteners, can flexibly adjust the spacing between the cutter discs, effectively removing the edge material of the cast film, thereby reducing the width and improving the tensile strength and puncture resistance of the lithium battery separator in the TD direction. At the same time, it reduces the interference of rough edges on the prototyping effect. Moreover, this structure is simple to use, highly adaptable, and significantly optimizes the performance, efficiency, and quality of separator prototyping. Compared with the method of customizing and replacing the die head, this solution greatly improves experimental efficiency and saves time and costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the edge-cutting device of this utility model; Figure 2 This is a schematic diagram of the tension mechanism of this utility model; In the diagram: 1. Column; 2. Support column; 3. First horizontal roller; 4. Movable retaining ring; 5. Fastener; 6. Degreasing roller; 7. Tension mechanism; 71. Sleeve; 72. Movable block; 73. Spring; 74. Pin; 8. Base; 9. Sensor; 10. Connecting roller; 11. Adjusting retaining ring; 12. Cutter head; 13. Second horizontal roller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-2 In this embodiment of the present invention, a lithium battery separator edge cutting device includes two columns 1 and two support columns 2. A first horizontal roller 3 is installed on the column 1. The first horizontal roller 3 is used to discharge the cut edge material and transport the cast film. A connecting roller 10 is provided between the two support columns 2. Two adjusting rings 11 are provided on the outer circumferential surface of the connecting roller 10. Fasteners 5 are installed on both adjusting rings 11 to lock the connection between the adjusting rings 11 and the connecting roller 10. A cutter disc 12 is installed on both adjusting rings 11 to cut off the side edge of the cast film.

[0017] Specifically, two columns 1 are arranged side by side, and the two columns 1 are respectively connected to the two ends of the first horizontal roller 3. The columns 1 provide support for the first horizontal roller 3. The connecting roller 10 can provide movement guidance for the two adjusting rings 11, and the fastener 5 can lock and fix the adjusting rings 11 after the position is adjusted. The cutter disc 12 includes a cutter arm and four sets of ceramic blades installed at the end of the cutter arm. The other end of the cutter arm is connected to the adjusting rings 11. By adjusting the position of the two adjusting rings 11, the distance between the two cutter discs 12 can be adjusted, thereby cutting off the side edges of the film and reducing the interference of the broken edges on the sample production effect.

[0018] Please see Figure 1 In one embodiment, preferably, each of the two support columns 2 is equipped with a movable retaining ring 4, and each of the two movable retaining rings 4 is equipped with a fastener 5 for locking the connection between the movable retaining ring 4 and the support column 2. An oil removal roller 6 is provided between the two movable retaining rings 4 for scraping off the white oil precipitated on the surface of the cast film.

[0019] Specifically, the inner diameter of the movable retaining ring 4 is adapted to the outer diameter of the support column 2, and the movable retaining ring 4 can be adjusted in height along the support column 2. The fastener 5 is a bolt. After the height of the movable retaining ring 4 is fixed, the bolt is rotated to make the end of the bolt tightly abut against the support column 2, thereby fixing the height of the movable retaining ring 4. The deslip roller 6 is made of anti-slip rubber with a Shore hardness of 60±5°. The deslip roller 6 can scrape off the white oil precipitated on the surface of the cast film, which can improve the slippage phenomenon during the film conveying process.

[0020] Please see Figure 1In one embodiment, preferably, both ends of the oil removal roller 6 are connected to two movable retaining rings 4 via a tension mechanism 7 to achieve adjustable pressure of the oil removal roller 6. The tension mechanism 7 includes a sleeve 71 mounted on the movable retaining rings 4 and a movable block 72 disposed inside the sleeve 71. A spring 73 connected to the inner wall of the sleeve 71 is installed at the end of the movable block 72 located inside the sleeve 71. A pin 74 is provided on the outer circumferential surface of the sleeve 71, and a plurality of insertion holes adapted to the ends of the pins 74 are provided on the movable block 72.

[0021] Specifically, one end of the sleeve 71 is connected to the movable retaining ring 4, and the inner diameter of the sleeve 71 matches the outer diameter of the movable block 72. One end of the movable block 72 is connected to the spring 73, and the other end is connected to the end of the degreasing roller 6. The degreasing roller 6 provides tension under the action of the spring 73, and the compression length of the spring 73 can be fixed by inserting the pin 74 into the corresponding hole. After release, the pressure generated by the spring 73 reset will achieve the pressing effect on the diaphragm.

[0022] Please see Figure 1 In one embodiment, preferably, the system further includes a base 8, with two uprights 1 and two support columns 2 mounted on the base 8. A sensor 9 is mounted on the base 8. Furthermore, the base 8 has four mounting holes, which correspond to the two uprights 1 and the two support columns 2, respectively. All four mounting holes are quickly fixed using M10 expansion bolts. In addition, the sensor 9 is connected to the second horizontal roller 13. The sensor 9 is a tension sensor with a range of 0-50N and an accuracy of ±0.1N. The signal is transmitted to the control console via a wire to monitor the tension of the cast film during the conveying process.

[0023] Please see Figure 1 In one embodiment, preferably, a second horizontal roller 13 is provided between the two support columns 2, and the second horizontal roller 13 is located below the connecting roller 10 for conveying the film.

[0024] The working principle and usage process of this utility model are as follows: First, the diaphragm is passed between the second horizontal roller 13 and the degreasing roller 6, and led out from above the first horizontal roller 3 to enter the longitudinal stretching area; then, the degreasing roller 6 is pressed on top of the diaphragm to perform degreasing treatment under appropriate tension; next, the required cutting edge width is set, the adjusting ring 11 is adjusted and fixed, the angle of the cutter disc 12 is adjusted and the cutter is lowered to cut off the edge material on both sides of the diaphragm. The diaphragm passes through the degreasing roller 6, the second horizontal roller 13, the cutter disc 12, and the first horizontal roller 3 in sequence to complete degreasing and cutting before entering the longitudinal stretching area. The conveying of the diaphragm depends on the traction force of the rear longitudinal stretching equipment. The second horizontal roller 13 and the degreasing roller 6 are both driven rollers, which can reduce friction damage.

[0025] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0026] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A lithium battery separator edge-cutting device, characterized in that, It includes two upright columns and two support columns. A first horizontal roller is installed on the upright columns. The first horizontal roller is used to discharge the cut-off edge material and transport the cast film. A connecting roller is provided between the two support columns. Two adjusting rings are provided on the outer circumference of the connecting roller. Fasteners are installed on both adjusting rings to lock the connection between the adjusting rings and the connecting rollers. A cutter head is installed on both adjusting rings to cut off the side edges of the cast film.

2. The lithium battery separator trimming device according to claim 1, characterized in that, Both of the support columns are equipped with movable retaining rings, and both movable retaining rings are equipped with fasteners to lock the connection between the movable retaining rings and the support columns. An oil removal roller is provided between the two movable retaining rings to scrape off the white oil that has precipitated on the surface of the cast film.

3. The lithium battery separator trimming device according to claim 2, characterized in that, Both ends of the oil removal roller are connected to two movable retaining rings via a tension mechanism. The tension mechanism includes a sleeve mounted on the movable retaining rings and a movable block disposed inside the sleeve. A spring connected to the inner wall of the sleeve is installed at the end of the movable block located inside the sleeve. A pin is provided on the outer circumferential surface of the sleeve.

4. The lithium battery separator trimming device according to claim 3, characterized in that, The movable block has several insertion holes that are adapted to the end of the pin.

5. The lithium battery separator trimming device according to claim 4, characterized in that, The device further includes a base, on which two columns and two support columns are mounted. A sensor is mounted on the base and is connected to the degreasing roller.

6. The lithium battery separator trimming device according to claim 1, characterized in that, The two support columns are connected by a second horizontal roller, which is positioned below the connecting roller.

7. The lithium battery separator trimming device according to claim 1, characterized in that, The cutter head includes a cutter arm and four sets of ceramic blades mounted at the end of the cutter arm, and the other end of the cutter arm is connected to an adjusting retaining ring.

8. The lithium battery separator trimming device according to claim 1, characterized in that, The fastener is a bolt.

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