Secondary cutting and cleaning equipment for membrane material for lithium battery and operation method of secondary cutting and cleaning equipment

Abstract

The invention relates to equipment for carrying out secondary cutting and cleaning on a defective membrane material for a lithium battery and an operation method of the equipment. The equipment comprises cutting equipment and cleaning equipment, the cutting equipment is provided with a cutter and a matched cutter holder; or the cutting equipment is a stamping cutter, and a stamping head is mounted on the stamping cutter; the cleaning equipment is provided with a membrane material clamp, the membrane material clamp is provided with a rectangular frame, and a partition plate is laid on the lower surface of the frame; a sealing ring is attached to the upper surface of the frame; the two ends of the frame or the partition plate are provided with fastening lugs extending outwards, and holes are formed in the fastening lugs. When the membrane material clamp is used, a plurality of membrane material clamps on which membrane materials are laid are stacked together, tab parts of the membrane materials are exposed, and the membrane material clamps are tightly clamped into a pile by utilizing the threaded rod; the cleaning equipment is provided with a dissolving tank, dissolving liquid is contained in the dissolving tank, and the dissolving liquid can ablate the exposed tabs, dissolve the carbon powder coated on the tabs and expose the metal films corresponding to the tab parts.

Description

Technical Field

[0001] The present invention relates to equipment for secondary cutting and cleaning of defective lithium battery film materials and an operating method thereof. Background Art

[0002] As a new type of energy storage device, lithium batteries have been widely used in recent years, especially in new energy vehicles. In the production of lithium batteries, membrane materials need to be widely used. In the existing production, membrane materials are often affected by various factors, and it is inevitable that a small number of them will have defects such as creases, punctures and ruptures, especially the ear parts of the membrane materials. This part of the membrane materials needs to be selected. In some large domestic lithium battery manufacturers, this part of the membrane material was previously treated as waste and did not enter the next production process; the membrane material contains precious metals such as copper and silver, as well as high-quality coatings, including carbon powder; such waste will result in great economic waste, so it is necessary to adopt a new solution to maximize the utilization rate of these originally defective membrane materials and achieve the purpose of making full use of the materials. Summary of the invention

[0003] In view of this, the present invention provides a secondary cutting and cleaning device for lithium battery film materials, which can reuse the film materials that were originally discarded, improve economic benefits, and have good use and promotion effects.

[0004] A secondary cutting and cleaning device for lithium battery film material, comprising a cutting device and a cleaning device in sequence; The cutting equipment has a tool and a matching tool holder. The tool is a utility knife or a shear. The film material is placed on the tool holder and cut by the tool. When the tool is a utility knife or a shear, the tool holder is a metal or stone with a smooth mirror surface on the upper surface.

[0005] Or the cutting device is a punching knife, which is a commercially available punching device. A punching head is installed on the punching knife, and the punching head is set according to the size specifications of the film material to be punched.

[0006] The cleaning device has a film material clamp, which has a rectangular frame. A partition is laid on the lower surface of the frame. The partition and the frame are sealed or integrally formed. A sealing ring is attached to the upper surface of the frame.

[0007] Furthermore, both ends of the frame or partition have outwardly extending fastening ears with holes formed on the fastening ears; when in use, multiple membrane clamps for laying membrane materials are stacked together, with the pole ears of the membrane materials exposed, and the membrane clamps are tightly clamped into a stack using threaded rods.

[0008] The cleaning equipment has a dissolving tank. When in use, multiple film material clamps containing film materials are placed in the dissolving tank. The dissolving tank contains a dissolving liquid, which can melt the exposed pole ears and dissolve the carbon powder coated on the pole ears to expose the metal film corresponding to the pole ear position.

[0009] Furthermore, the upper surface of the knife seat is etched with a concave profile, and the profile corresponds to the size of different film materials that need to be cut.

[0010] Furthermore, a sealing ring is also attached to the lower surface edge of the partition of the film material clamp to further improve the sealing when multiple film material clamps are clamped.

[0011] The membrane material clamp is equipped with a lattice hanging cage, and a plurality of membrane material clamps are pressed together and placed in the lattice hanging cage.

[0012] Furthermore, the bottom of the dissolution tank is V-shaped or a plane inclined to one side, so as to ensure that the dissolved carbon powder is accumulated to facilitate subsequent extraction and recovery.

[0013] Furthermore, a water outlet is provided at the bottom of the dissolving tank, and a filter can be non-fixedly installed on the water outlet to filter the dissolved carbon powder. A filter material is placed in the filter, and the filter material is activated carbon or non-woven fabric.

[0014] Furthermore, a water pipe is installed on the filter, and the other end of the water pipe extends into the top of the dissolution tank; a circulating water pump is installed on the water pipe, and the circulating water pump is connected to an AC power supply. When the circulating water pump is turned on, it can promote the continuous flow of the dissolved liquid. When the dissolved liquid flows, it can filter the carbon powder through the filter in time. Compared with a static liquid surface, since the dissolved liquid flows continuously, it can fully dissolve multiple tabs.

[0015] Furthermore, a heating device is installed in the cleaning equipment, and the heating device is connected to an AC power supply to ensure that the temperature of the dissolving liquid meets the standard and can ablate the tab part within a predetermined time.

[0016] Furthermore, an ultrasonic generator is installed in the dissolving tank, and the ultrasonic generator is connected to an AC power supply. The high-frequency vibration of the ultrasonic generator can accelerate the cleaning of the pole ear part of the membrane material.

[0017] The heating device and ultrasonic generator are both commercially available products, wherein the heating device is a PTC heating device, which can heat while ensuring that the temperature is not too high.

[0018] Furthermore, the cleaning equipment is also equipped with a cleaning tank, and the film material clamps of multiple clamped film materials that have completed ablation are placed in the cleaning tank. The cleaning tank contains distilled water to further rinse off the carbon powder that may remain on the tab part.

[0019] The operating method of the present invention is as follows: S1. Select the defective films that need to be cut and conduct secondary screening, and classify them into different specifications according to the available specifications and product needs; S2. Cutting using cutting equipment; S3. Place the cut film into the film clip, wherein the ear portion of the film is exposed outside the film clip; S4. Stack multiple membrane material clips for placing membrane materials together and fasten them with long screws to ensure that when placed in the dissolution tank, the dissolving liquid does not penetrate into the membrane material except the ear part; the top membrane material clip does not need to place the membrane material; S5. Place the laminated and fastened film material into a dissolution tank containing a dissolving solution; S6. After the predetermined time, lift the laminated and fastened film clips and observe whether the carbon powder in the tab part is completely dissolved. If it is completely dissolved, place it aside to air dry; S7. After the film is completely air-dried, disassemble the film clip and take out the film.

[0020] Furthermore, in step S5, the laminated and fastened film material clips are placed in a grid hanging cage, and then the grid hanging cage is completely immersed in the dissolving liquid in the dissolving tank; or the laminated and fastened film material clips are directly placed in the dissolving tank with the dissolving liquid; Furthermore, in step S5, the laminated and fastened film material is clamped and placed on top of the dissolution tank, the tab portion of the film material is fully in contact with the dissolution liquid, and the remaining portion is not in contact with the dissolution liquid and remains dry.

[0021] Furthermore, use an electric fan or air conditioner to accelerate the drying of the wet membrane material.

[0022] Specifically, the dissolution time of the laminated and fastened membrane material clamp placed in the dissolution tank containing the dissolving solution is 3-10 minutes, preferably 4-8 minutes, and more preferably 5 minutes; the water temperature in the dissolution tank is 75-95°C, preferably 80-90°C.

[0023] Furthermore, when the cut membrane material is laid on the membrane material clamp, the tab portion of the membrane material is exposed; the membrane material is laid out on one side or on both sides; when the laminated and fastened membrane material clamp is completely immersed in the dissolving tank, the membrane material is laid out on one side or on both sides, preferably on both sides, so as to increase the number of membrane materials immersed in a single time and improve production efficiency; When the laminated and fastened membrane material is clamped and placed above the dissolving tank, the ear portion of the membrane material is fully in contact with the dissolving liquid, and the remaining portion is not in contact with the dissolving liquid, the membrane material is laid out on one side.

[0024] The present invention has an ingenious concept, a simple structure and is easy to use. Compared with the existing idea of ​​completely scrapping the membrane material, it improves the utilization efficiency of the membrane material, is beneficial to the enterprise's cost reduction and efficiency improvement, and has low requirements on equipment, and has good use and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a work flow chart of the present invention when in use.

[0027] Figure 2 It is a schematic diagram of a top view of the upper surface of the knife holder in the present invention.

[0028] Figure 3 It is a projection schematic diagram of the punch head in the present invention.

[0029] Figure 4 Schematic diagrams of top and side views of the membrane clamp of the present invention (the left side is a top view and the right side is a side view).

[0030] Figure 5 It is a top view schematic diagram when the membrane material clamp is fully covered on both sides in the present invention.

[0031] Figure 6 Schematic diagram of the present invention when immersed in a dissolving tank Figure 1 (The membrane clip is completely immersed in the dissolving tank).

[0032] Figure 7 Schematic diagram of the present invention when immersed in a dissolving tank Figure 2 (The ear part in the membrane material clamp is immersed in the dissolving tank).

[0033] Figure 8 It is a schematic diagram of the cross-sectional state of two dissolving tanks in the present invention. DETAILED DESCRIPTION

[0034] Refer to the attached Figure 1-8 , the present invention provides a secondary cutting and cleaning device for lithium battery film material, which comprises a cutting device and a cleaning device in sequence; Refer to the attached Figure 2 The cutting equipment has a tool and a matching tool holder 1, the tool is a utility knife or a shear, the film material 4 is placed on the tool holder 1, and the tool is used for cutting; when the tool is a utility knife or a shear, the tool holder 1 is a metal or stone with a smooth mirror surface on the upper surface.

[0035] Furthermore, an upper surface of the knife holder 1 is etched with a concave profile 1 - 1 , and the profile 1 - 1 corresponds to the size of different film materials 4 that need to be cut.

[0036] Refer to the attached Figure 3The cutting device is a punching knife, which is a commercially available punching device. A punching head 2 is installed on the punching knife, and the punching head 2 is set according to the size specifications of the film material 4 that needs to be punched.

[0037] Refer to the attached Figure 4 , Attachment Figure 5 The cleaning device has a membrane material clamp 3, and the membrane material clamp 3 has a rectangular frame 3-1. The lower surface of the frame 3-1 is paved with a partition 3-2, and the partition 3-2 and the frame 3-1 are sealed or integrally formed; a sealing ring 3-3 is attached to the upper surface of the frame 3-1.

[0038] Furthermore, a sealing ring is also attached to the lower surface edge of the partition 3 - 2 of the film material clamp 3 to further improve the sealing performance when the multiple film material clamps 3 are clamped.

[0039] Refer to the attached Figure 6 Furthermore, both ends of the frame 3-1 or the partition 3-2 have outwardly extending fastening ears 3-4, and holes are opened on the fastening ears 3-4; when in use, multiple membrane clamps 3 for laying membrane materials 4 are stacked together, with the pole ears 4-1 of the membrane materials 4 partially exposed, and the membrane clamps 3 are tightly clamped into a stack using threaded rods 5.

[0040] The membrane material clamp is equipped with a lattice hanging cage 6 , and a plurality of membrane material clamps 3 clamping membrane materials 4 are pressed together and placed in the lattice hanging cage 6 .

[0041] The cleaning equipment has a dissolving tank 7. When in use, multiple film material clamps 3 clamping film materials 4 are placed in the dissolving tank 7. The dissolving tank 7 contains a dissolving liquid, which can melt the exposed pole ear 4-1 and dissolve the carbon powder coated on the pole ear 4-1 to expose the metal film corresponding to the pole ear 4-1.

[0042] Furthermore, the bottom of the dissolving tank 7 is V-shaped or a plane inclined to one side, so as to ensure that the dissolved carbon powder is accumulated to facilitate subsequent extraction and recovery.

[0043] Furthermore, a water outlet 7-1 is provided at the bottom of the dissolving tank 7, and a filter 7-2 can be non-fixedly installed on the water outlet 7-1 to filter the dissolved carbon powder. A filter material for filtering is placed in the filter 7-2, and the filter material is activated carbon or non-woven fabric.

[0044] Furthermore, a water pipe 7-3 is installed on the filter 7-2, and the other end of the water pipe 7-3 extends into the top of the dissolution tank 7; a circulating water pump 7-4 is installed on the water pipe 7-3, and the circulating water pump 7-4 is connected to an AC power supply. When the circulating water pump 7-4 is turned on, it can promote the continuous flow of the dissolved liquid. When the dissolved liquid flows, it can filter the carbon powder through the filter 7-2 in time. Since the dissolved liquid flows continuously, it can also fully dissolve multiple tabs 4-1 compared to a static liquid surface.

[0045] Furthermore, a heating device 8 is installed in the cleaning device, and the heating device 8 is connected to an AC power supply 10 to ensure that the temperature of the dissolving liquid meets the standard and can ablate the tab 4-1 part within a predetermined time.

[0046] Furthermore, an ultrasonic generator 9 is installed in the dissolving tank, and the ultrasonic generator 9 is connected to an AC power source 10 . The high-frequency vibration of the ultrasonic generator 9 can accelerate the cleaning of the tab 4 - 1 portion of the membrane material 4 .

[0047] The heating device 8 and the ultrasonic generator 9 are both commercially available products, wherein the heating device 8 is a PTC heating device, which can heat while ensuring that the temperature is not too high, and has good safety.

[0048] Furthermore, the cleaning equipment is also equipped with a cleaning tank, and the film material clamp 3 with multiple film materials 4 that have been ablated is placed in the cleaning tank. The cleaning tank contains distilled water to further rinse off the carbon powder that may remain on the tab 4-1.

[0049] Refer to the attached Figure 1 When in use, the defective film materials 4 that need to be cut are selected and screened a second time, and the film materials 4 are classified into different specifications according to the available specifications and the needs of the product; Cutting using cutting equipment; Put the cut film material 4 on the film material clamp 3, wherein the tab 4-1 of the film material 4 is exposed outside the film material clamp; Stack a plurality of membrane material clips 3 for placing membrane materials 4 together and fasten them with long screws 5 and bolts to ensure that when placed in the dissolution tank 7, the dissolving liquid does not penetrate into the membrane material 4 except the tab 4-1; the top membrane material clip 3 does not need to place membrane materials; Place the laminated and fastened film material clip 3 into a dissolving tank 7 containing a dissolving liquid; After the predetermined time, lift the laminated and fastened film clip 3 and observe whether the carbon powder on the tab 4-1 is completely dissolved. If it is completely dissolved, place it aside to air dry. After the air drying is completed, the film material clamp 3 is disassembled and the film material 4 is taken out.

[0050] Put the laminated and fastened film material clip 3 into the grid hanging cage 6, and then completely immerse the grid hanging cage 6 into the dissolving liquid in the dissolving tank 7; or directly put the laminated and fastened film material clip 3 into the dissolving tank 7 with the dissolving liquid.

[0051] The laminated and fastened film material clip 3 is placed on the dissolving tank 7, the tab 4-1 of the film material 4 is fully in contact with the dissolving liquid, and the rest of the film material 4 is not in contact with the dissolving liquid and is kept dry.

[0052] Furthermore, an electric fan or air conditioner is used to accelerate the drying of the wet film material 4 .

[0053] Specifically, the dissolution time of the laminated and fastened film clip 3 placed in the dissolution tank 7 containing the dissolving liquid is 3-10 minutes, preferably 4-8 minutes, and more preferably 5 minutes; the water temperature in the dissolution tank 7 is 75-95°C, preferably 80-90°C.

[0054] Refer to the attached Figure 6 , further, when the cut film material 4 is laid on the film material clamp 3, the ear 4-1 of the film material 4 is partially exposed; the film material 4 is laid out on one side or on both sides; when the laminated and fastened film material 4 clamp is completely immersed in the dissolving tank 7, the film material 4 is laid out on one side or on both sides, preferably on both sides, so as to increase the number of film materials 4 immersed in a single time and improve production efficiency; Refer to the attached Figure 7 When the laminated and fastened film clip 3 is placed on the dissolving tank 7, the ear 4-1 of the film 4 is fully in contact with the dissolving solution, and the rest of the film 4 is not in contact with the dissolving solution, the film 4 is laid out on one side.

Claims

1. A secondary cutting and cleaning device for lithium battery film, characterized in that: It includes cutting equipment and cleaning equipment in turn; The cutting device has a knife and a matching knife seat, the knife is a utility knife or a guillotine, the film material is placed on the knife seat, and the knife is used for cutting; when the knife is a utility knife or a guillotine, the knife seat is a metal or stone material with a flat mirror surface on the upper surface; Or the cutting device is a punching knife, on which a punching head is installed, and the punching head is set according to the size specifications of the film material to be punched; The cleaning device has a film material clamp, which has a rectangular frame, a partition is laid on the lower surface of the frame, and the partition and the frame are sealed or integrally formed; a sealing ring is attached to the upper surface of the frame; Both ends of the frame or partition have outwardly extending fastening ears, and holes are opened on the fastening ears. When in use, multiple membrane clamps for laying membrane materials are stacked together, with the extreme ear parts of the membrane materials exposed, and the membrane clamps are tightly clamped into a stack using threaded rods; The cleaning equipment has a dissolving tank. When in use, multiple film material clamps containing film materials are placed in the dissolving tank. The dissolving tank contains a dissolving liquid, which can melt the exposed pole ears and dissolve the carbon powder coated on the pole ears to expose the metal film corresponding to the pole ear position.

2. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: The upper surface of the knife seat is etched with a concave profile, and the profile corresponds to the size of different film materials that need to be cut.

3. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: A sealing ring is also attached to the lower surface edge of the partition of the membrane material clamp.

4. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: The membrane material clamp is equipped with a lattice hanging cage, and a plurality of membrane material clamps are pressed together and placed in the lattice hanging cage.

5. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: The bottom of the dissolving tank is V-shaped or a plane inclined to one side.

6. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: A water outlet is provided at the bottom of the dissolving tank, and a filter can be installed on the water outlet in a non-fixed manner. A filter material for filtering is placed in the filter, and the filter material is activated carbon or non-woven fabric; A water pipe is also installed on the filter, and the other end of the water pipe extends into the top of the dissolution tank; a circulating water pump is installed on the water pipe, and the circulating water pump is connected to an AC power supply. When the circulating water pump is turned on, it can cause the dissolving liquid to flow continuously. When the dissolving liquid flows, it can filter the carbon powder through the filter in time. Compared with a static liquid surface, the dissolving liquid can fully dissolve multiple tabs due to its continuous flow.

7. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: The cleaning device is equipped with a heating device, which is connected to an AC power supply to ensure that the temperature of the dissolving liquid meets the standard and can ablate the tab part within a predetermined time. An ultrasonic generator is installed in the dissolving tank, and the ultrasonic generator is connected to an AC power supply. The high-frequency vibration of the ultrasonic generator can accelerate the cleaning of the pole ear part of the membrane material. The heating device is a PTC heating device.

8. The secondary cutting and cleaning equipment for lithium battery film according to claim 1, characterized in that: The cleaning equipment is also equipped with a washing tank, in which distilled water is contained.

9. An operating method of the secondary cutting and cleaning device for lithium battery film material according to claim 1, characterized in that: S1. Select the defective films that need to be cut and conduct secondary screening, and classify them into different specifications according to the available specifications and product needs; S2. Cutting using cutting equipment; S3. Place the cut film into the film clip, wherein the ear portion of the film is exposed outside the film clip; S4. Stack multiple membrane material clips for placing membrane materials together and fasten them with long screws to ensure that when placed in the dissolution tank, the dissolving liquid does not penetrate into the membrane material except the ear part; the top membrane material clip does not need to place the membrane material; S5. Place the laminated and fastened film material into a dissolution tank containing a dissolving solution; S6. After the predetermined time, lift the laminated and fastened film clips and observe whether the carbon powder in the tab part is completely dissolved. If it is completely dissolved, place it aside to air dry; S7. After the film is completely air-dried, disassemble the film clip and take out the film.

10. The method for operating the secondary cutting and cleaning equipment for lithium battery film according to claim 9, characterized in that: In step S5, the laminated and fastened film material clips are placed in a grid hanging cage, and then the grid hanging cage is completely immersed in the dissolving liquid in the dissolving tank; or the laminated and fastened film material clips are directly placed in the dissolving tank with the dissolving liquid.

11. The method for operating the secondary cutting and cleaning equipment for lithium battery film according to claim 9, characterized in that: In step S5, the laminated and fastened film material is clamped and placed on top of the dissolving tank, the tab portion of the film material is fully in contact with the dissolving liquid, and the remaining portion is not in contact with the dissolving liquid and remains dry.

12. The operating method of the secondary cutting and cleaning equipment for lithium battery film according to claim 9, characterized in that: Specifically, the laminated and fastened film material clip is placed in a dissolving tank containing a dissolving liquid and the dissolving time is 3-10 minutes; the water temperature in the dissolving tank is 75-95°C.

13. The method for operating the secondary cutting and cleaning equipment for lithium battery film according to claim 9, characterized in that: When the cut membrane material is laid on the membrane material clamp, the tab portion of the membrane material is exposed; the membrane material is laid out on one side or on both sides; when the laminated and fastened membrane material clamp is completely immersed in the dissolving tank, the membrane material is laid out on one side or on both sides, preferably on both sides, so as to increase the number of membrane materials immersed in a single time and improve production efficiency; When the laminated and fastened membrane material is clamped and placed above the dissolving tank, the ear portion of the membrane material is fully in contact with the dissolving liquid, and the remaining portion is not in contact with the dissolving liquid, the membrane material is laid out on one side.

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