Battery cell tab cutting device

Abstract

The utility model relates to the technical field of battery cell production, and discloses a battery cell tab cutting device which comprises a rack, a lower cutter arranged on the rack, an upper cutter and a cleaning scraper, the upper cutter and the cleaning scraper are arranged on the rack and located above the lower cutter, and the upper cutter can move up and down relative to the lower cutter to cut a tab of a soft package battery cell located on the lower cutter; the cleaning scraper is telescopically arranged below the edge of the lower cutter through an elastic piece, the telescopic direction of the cleaning scraper is perpendicular to the cutting direction of the upper cutter and the moving direction of the upper cutter, the first side of the cleaning scraper extends out of the edge of the lower cutter in the telescopic direction of the cleaning scraper, and the first side is arranged to be a scraper slope; the scraper slope faces the edge of the upper cutter and can make contact with the edge of the upper cutter.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-pack battery cell production, and particularly relates to a cutting device for battery cell tabs. Background Art

[0002] Before assembling a soft-pack module, cutting the tabs of the soft-pack battery cell to appropriate lengths and widths is an important step in the production of the soft-pack module. At present, the cutting knives of existing battery cell tab cutting devices are usually divided into an upper cutting knife and a lower cutting knife. During cutting, the tabs are placed in the lower cutting knife to be positioned, and the upper cutting knife is driven by a cylinder to press down, and the tabs are cut off by the shearing force. However, after cutting is completed, the tab debris adhering to the cutting edge of the upper cutting knife needs to be manually cleaned regularly during the high-efficiency repeated cutting operation, thereby reducing the automatic production efficiency of the battery cell tab cutting device. Content of the Utility Model

[0003] One of the main purposes of the utility model is to provide a cutting device for battery cell tabs, which aims to solve the technical problem that after cutting the tabs of the soft-pack battery cell by the existing battery cell tab cutting device, the tab debris adhering to the cutting edge of the upper cutting knife needs to be manually cleaned regularly during the high-efficiency repeated cutting operation.

[0004] To achieve the above purpose, the utility model provides a cutting device for battery cell tabs, including:

[0005] A frame;

[0006] A lower cutting assembly, including a lower cutting knife arranged on the frame;

[0007] An upper cutting assembly, including an upper cutting knife arranged on the frame and located above the lower cutting knife. The upper cutting knife can move up and down relative to the lower cutting knife and is used for cutting the tabs of the battery cell positioned between the upper cutting knife and the lower cutting knife. An installation groove is formed below the cutting edge of the lower cutting knife, and the opening direction of the installation groove is perpendicular to the moving direction of the upper cutting knife;

[0008] A cleaning scraper, including a scraper body and a scraper inclined surface. The scraper body is adapted to the installation groove, and the scraper body is telescopically arranged in the installation groove through an elastic member, so that the scraper body can telescopically move relative to the opening direction of the installation groove. One side of the scraper body is provided with the scraper inclined surface. The scraper inclined surface is arranged outside the installation groove, and the scraper inclined surface is on the same side as the cutting edge of the lower cutting knife, and the scraper inclined surface faces the cutting edge of the upper cutting knife.

[0009] Further, a long strip groove penetrating through opposite surfaces of the cleaning blade is formed on the cleaning blade, a locking hole penetrating upward through the lower cutting knife is formed in the installation groove, a positioning member penetrating through the long strip groove is installed in the locking hole, the elastic member is arranged in the long strip groove, one end of the elastic member is connected to the positioning member, and the other end of the elastic member is connected to one end of the long strip groove facing away from the positioning member.

[0010] Further, a cleaning air knife is further arranged on the upper cutting knife, and the air outlet of the cleaning air knife faces the cutting edges of the upper cutting knife and the lower cutting knife.

[0011] Further, the cleaning air knife includes a fixing member and an air cavity cylinder body. The fixing member is fixed on the upper cutting knife, the air cavity cylinder body is rotatably arranged on the fixing member, and the inner cavity of the air cavity cylinder body is an air cavity; one end of the air cavity cylinder body is closed, an air inlet communicated with the air cavity is arranged at the other end of the air cavity cylinder body, and the air outlet is formed on the outer peripheral wall of the air cavity cylinder body and communicated with the air cavity.

[0012] Further, guiding protrusions are arranged on opposite side surfaces of the upper cutting knife along the direction in which the upper cutting knife moves relative to the lower cutting knife. Guiding parts extending in the vertical direction are arranged on opposite sides of the lower cutting knife, guiding grooves extending in the vertical direction are formed on opposite surfaces of the two guiding parts, and the guiding grooves are in sliding fit with the guiding protrusions.

[0013] Further, the cutting edge of the upper cutting knife includes a first inclined cutting edge, a second inclined cutting edge and a third inclined cutting edge. The first inclined cutting edge is parallel to the third inclined cutting edge, the third inclined cutting edge is lower than the first inclined cutting edge, the second inclined cutting edge connects the first inclined cutting edge and the third inclined cutting edge, the first inclined cutting edge and the second inclined cutting edge are in the same plane, and the third inclined cutting edge is not in the plane formed by the first inclined cutting edge and the second inclined cutting edge.

[0014] Further, the frame includes a lower fixing plate and at least two connecting guide columns. At least two connecting guide columns are respectively located on opposite sides of the lower fixing plate and are fixedly connected to the lower fixing plate, and each connecting guide column extends in the vertical direction;

[0015] The lower cutting assembly further includes a lower sliding table and a first lifting device fixed on the lower fixing plate. Opposite sides of the lower sliding table are respectively slidably connected to at least two connecting guide columns, the lower cutting knife is arranged on the lower sliding table, and the lifting end of the first lifting device is fixedly connected to the lower sliding table.

[0016] Further, the frame further includes an upper fixing plate, which is fixedly connected to the end of the connecting guide post facing away from the lower fixing plate. The upper cutting assembly further includes an upper sliding table and a second lifting device fixed on the upper fixing plate. The upper fixing plate is also connected with a plurality of sliding table guide posts extending in the vertical direction. The sliding table guide posts are slidably penetrated through the upper fixing plate. The opposite sides of the upper sliding table are respectively slidably connected to at least one of the connecting guide posts and fixedly connected to at least one of the sliding table guide posts. The upper cutting knife is arranged on the upper sliding table, and the lifting end of the second lifting device is fixedly connected to the upper sliding table.

[0017] Further, the cell tab cutting device of the present invention further includes a first insulating fixing plate and a second insulating fixing plate. The first insulating fixing plate is arranged between the lower sliding table and the lower cutting knife. The lower cutting knife is fixed on the first insulating fixing plate, and the first insulating fixing plate is fixed on the lower sliding table; the second insulating fixing plate is arranged between the upper sliding table and the upper cutting knife. The upper cutting knife is fixed on the second insulating fixing plate, and the second insulating fixing plate is fixed on the upper sliding table.

[0018] Further, a material receiving device is also arranged on the frame, and the material receiving device is used for receiving the tab waste generated when the upper cutting knife moves relative to the lower cutting knife to cut the tabs.

[0019] Further, the material receiving device includes a surrounding plate and a material receiving barrel. The surrounding plate is fixed on the upper surface of the first insulating fixing plate and encloses a blanking cavity with the lower cutting knife. The feeding port of the material receiving barrel is fixedly connected to the bottom surface of the lower sliding table in a sealed manner. A blanking port is formed on the lower sliding table and the first insulating fixing plate, and the blanking port communicates the blanking cavity with the feeding port of the material receiving barrel.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] When the present utility model is in use, the upper cutting knife is driven to move downward relative to the lower cutting knife to cut the pole ear of the battery cell positioned between the lower cutting knife and the upper cutting knife. Since the scraping knife body is matched with the installation groove below the cutting edge of the lower cutting knife, the opening direction of the installation groove is perpendicular to the moving direction of the upper cutting knife, and the degree of freedom of the scraping knife body is only to expand and contract relative to the opening direction of the installation groove. In addition, the scraping knife slope on the scraping knife body is on the same side as the cutting edge of the lower cutting knife and faces the cutting edge of the upper cutting knife. Therefore, when the upper cutting knife performs a downward cutting operation, the upper cutting knife will contact the scraping knife slope, generating a downward pressure on the scraping knife slope, causing the scraping knife slope to simultaneously generate a backward extrusion pressure parallel to the scraping knife body. The scraping knife body starts to retract and compress the elastic member. As the upper cutting knife continues to move downward, the scraping knife slope will retract into the installation groove. At this time, since the elastic member is compressed, the scraping knife body generates a pressure to protrude outward, causing the scraping knife slope to have a pressure contact with the upper cutting knife. When the upper cutting knife retracts upward, the scraping knife slope can automatically clean the pole ear debris adhered to the cutting edge of the upper cutting knife, avoiding manual regular cleaning of the pole ear debris adhered to the cutting edge of the upper cutting knife. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the battery cell pole ear cutting device of the present utility model;

[0023] Figure 2 is another perspective structural diagram of the battery cell pole ear cutting device of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the lower cutting knife involved in the embodiment of the present utility model;

[0025] Figure 4 is a schematic structural diagram of the sliding fit between the lower cutting knife and the upper cutting knife involved in the embodiment of the present utility model;

[0026] Figure 5 is another perspective structural diagram of the sliding fit between the lower cutting knife and the upper cutting knife involved in the embodiment of the present utility model;

[0027] Figure 6 is a schematic structural diagram of the cleaning scraping knife involved in the embodiment of the present utility model;

[0028] Figure 7 is a front view of the sliding fit between the lower cutting knife and the upper cutting knife involved in the embodiment of the present utility model;

[0029] Figure 8 is Figure 7 the cross-sectional view at A-A in

[0030] Figure 9 is a schematic structural diagram of the cleaning air knife involved in the embodiment of the present utility model;

[0031] Figure 10This is a schematic diagram of another angle of the sliding fit between the lower cutting knife and the upper cutting knife according to an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the upper cutting knife according to an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of another angle of the upper cutting knife according to an embodiment of the present invention;

[0034] Figure 13 This is a front view of the upper cutting knife according to an embodiment of the present invention;

[0035] Figure 14 This is a top view of the upper cutting knife according to an embodiment of the present invention;

[0036] Figure 15 This is a cross-sectional view of the battery cell tab cutting device of the present invention;

[0037] Figure 16 This is a schematic diagram of the structure after the tab is cut according to an embodiment of the present invention.

[0038] Reference numerals in each drawing:

[0039] 1. Frame; 10. Upper fixing plate; 11. Lower fixing plate; 12. Connecting guide post; 13. Slide table guide post; 130. Limiting boss; 2. Lower cutting knife; 20. Lower cutting edge; 21. Installation groove; 210. First opening; 211. Second opening; 22. Locking hole; 220. Positioning member; 23. Lower slide table; 24. First insulating fixing plate; 25. Material dropping port; 26. Guiding part; 260. Guiding groove; 27. First lifting device; 3. Upper cutting knife; 30. Upper cutting edge; 301. First inclined cutting edge; 302. Second inclined cutting edge; 303. Third inclined cutting edge; 31. Guiding protrusion; 32. Upper slide table; 33. Second insulating fixing plate; 34. Second lifting device; 4. Cleaning scraper; 40. Scraper inclined surface; 401. Long strip groove; 4010. Elastic member; 5. Cleaning air knife; 50. Fixing member; 51. Air chamber cylinder body; 510. Air inlet; 511. Air outlet; 6. Enclosure; 60. Material dropping cavity; 7. Feeding bucket; 70. Discharging bucket. Detailed implementation manners

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "width", "upper", "lower", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0044] Before assembling the soft-pack module, cutting the tabs of the soft-pack battery cells to appropriate lengths and widths is an important step in the production of the soft-pack module. Currently, the cutting knives of existing battery cell tab cutting devices are usually divided into an upper cutting knife and a lower cutting knife. During cutting, the tabs are placed in the lower cutting knife to be positioned, and the upper cutting knife is driven by a cylinder to press down to cut the tabs with a shearing force. However, after cutting, the tab debris adhering to the cutting edge of the upper cutting knife needs to be manually cleaned regularly, thus reducing the automated production efficiency of the battery cell tab cutting device.

[0045] Based on this, the present utility model provides a battery cell tab cutting device to solve the technical problem that after cutting the tabs of the soft-pack battery cells by the existing battery cell tab cutting device, the tab debris adhering to the cutting edge of the upper cutting knife needs to be manually cleaned regularly.

[0046] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0047] Please refer to Figures 1 - 16, the present utility model proposes a cell tab cutting device, which includes a frame 1, a lower cutting assembly, an upper cutting assembly, and a cleaning scraper 4. Among them, the lower cutting assembly includes a lower cutting knife 2 provided on the frame 1; the upper cutting assembly includes an upper cutting knife 3 provided on the frame 1 and located above the lower cutting knife 2. Refer to Figure 1 , the upper cutting knife 3 can move up and down relative to the lower cutting knife 2 for cutting the tabs of the soft-pack cell positioned between the lower cutting knife 2 and the upper cutting knife 3. The direction in which the upper cutting knife 3 moves relative to the lower cutting knife 2 is also the Figure 1 vertical direction shown in

[0048] . By driving the upper cutting knife 3 to move downward relative to the lower cutting knife 2, the tabs of the soft-pack cell positioned on the lower cutting knife 2 can be cut. Figure 3 , Figure 4 and Figure 5 , an installation groove 21 is opened below the cutting edge of the lower cutting knife 2. The opening direction of the installation groove 21 is perpendicular to the movement direction of the upper cutting knife 3. In addition, the cleaning scraper 4 includes a scraper body and a scraper inclined surface 40. The scraper body is adapted to the installation groove 21. The scraper body is telescopically arranged in the installation groove 21 through an elastic member 4010, so that the scraper body can be telescopic relative to the opening direction of the installation groove 21. One side of the scraper body is provided with the scraper inclined surface 40. The scraper inclined surface 40 is arranged outside the installation groove 21. The scraper inclined surface 40 is on the same side as the cutting edge of the lower cutting knife 2, and the scraper inclined surface 40 faces the cutting edge of the upper cutting knife 3.

[0049] In summary, when the cell tab cutting device of the present utility model is in use, by driving the upper cutting knife 3 to move downward relative to the lower cutting knife 2, the tabs of the cell positioned between the lower cutting knife 2 and the upper cutting knife 3 are cut. Since the scraper body cooperates with the installation groove 21 below the cutting edge of the lower cutting knife 2, the opening direction of the installation groove 21 is perpendicular to the movement direction of the upper cutting knife 3, and the degree of freedom of the scraper body is only to perform a telescopic action relative to the opening direction of the installation groove 21. In addition, the scraper inclined surface 40 on the scraper body is on the same side as the cutting edge of the lower cutting knife 2 and faces the cutting edge of the upper cutting knife 3. Therefore, when the upper cutting knife 3 performs a downward cutting operation, the upper cutting knife 3 will contact the scraper inclined surface 40, generating a downward pressure on the scraper inclined surface 40, causing the scraper inclined surface 40 to simultaneously generate a retracting extrusion pressure parallel to the scraper body. The scraper body starts to retract and compress the elastic member 4010. As the upper cutting knife 3 continues to move downward, the scraper inclined surface 40 will retract into the installation groove 21. At this time, since the elastic member 4010 is compressed, the scraper body generates an outward extending pressure, making the scraper inclined surface 40 have a pressure contact with the upper cutting knife 3. When the upper cutting knife 3 retracts upward, the scraper inclined surface 40 can automatically clean the tab debris adhering to the cutting edge of the upper cutting knife 3, avoiding manual regular cleaning of the tab debris adhering to the cutting edge of the upper cutting knife 3.

[0050] In an embodiment, refer to Figure 3, an installation groove 21 for installing the cleaning scraper 4 is provided below the cutting edge of the cutting knife 2, so as to avoid the cleaning scraper 4 being completely exposed outside the cutting knife 2 and occupying space. Specifically, the installation groove 21 is located 5-8 mm below the cutting edge 20 of the lower cutting knife, so as to reduce the downward movement distance of the upper cutting knife 3 and improve the cutting efficiency. In addition, referring to Figure 1 , the installation groove 21 runs through the opposite sides of the lower cutting knife 2 along the horizontal first direction. The opposite openings of the installation groove 21 in the horizontal first direction are the first opening 210 and the second opening 211 respectively. The cleaning scraper 4 is installed into the installation groove 21 from the position of the second opening 211, and the scraping inclined surface 40 of the cleaning scraper 4 extends out of the lower cutting edge 20 from the position of the first opening 210. When the upper cutting knife 3 moves downward relative to the lower cutting knife 2, the upper cutting edge 30 and the lower cutting edge 20 interact with each other. After cutting the tabs of the soft-pack battery cells positioned on the upper surface of the lower cutting knife 2, the upper cutting knife 3 moves downward to below the scraping inclined surface 40, and the scraping inclined surface 40 retracts under the drive of the upper cutting knife 3. At the same time, under the action of the elastic member 4010, the cleaning scraper 4 returns to contact with the side surface of the upper cutting knife 3 again. Thus, when the upper cutting knife 3 moves upward in the vertical direction, relative movement will occur between the upper cutting knife 3 and the cleaning scraper 4, so that the bottom surface of the cleaning scraper 4 automatically scrapes and cleans the tab debris adhering to the cutting edge of the upper cutting knife 3.

[0051] In order to clearly know how the cleaning scraper 4 is telescopically installed in the installation groove 21 below the cutting edge of the lower cutting knife 2 through the elastic member 4010, an elaboration is made here: Referring to Figures 3 - 8 , a long groove 401 running through the opposite surfaces of the cleaning scraper 4 is provided. A locking hole 22 penetrating the lower cutting knife 2 upward is provided in the installation groove 21. A positioning member 220 passing through the long groove 401 is installed in the locking hole 22. The positioning member 220 is preferably a positioning pin, and the elastic member 4010 is arranged in the long groove 401. The elastic member 4010 is preferably a spring; among them, referring to Figure 4, one end of the elastic member 4010 is connected to the positioning member 220, and the other end of the elastic member 4010 is connected to one end of the long slot 401 facing away from the positioning member 220. In this way, after the upper cutting knife 3 cuts the above-mentioned tab, the upper cutting knife 3 continues to move downward in the vertical direction, so that the cutting edge of the upper cutting knife 3 can contact the scraping knife inclined surface 40. When the cutting edge of the upper cutting knife 3 moves downward in the vertical direction until it contacts the scraping knife inclined surface 40, the upper cutting knife 3 continues to move downward in the vertical direction, and a downward acting force will be applied to the scraping knife inclined surface 40 of the cleaning scraping knife 4. After that, the cleaning scraping knife 4 will retract a small distance along the horizontal first direction. The compression amount of the elastic member 4010 is the distance that the cleaning scraping knife 4 retracts. At the same time, under the elastic acting force of the elastic member 4010, the cleaning scraping knife 4 resets, so that the side of the scraping knife inclined surface 40 facing away from the second opening 211 of the mounting groove 21 abuts against the side of the upper cutting knife 3 close to the first opening 210 of the mounting groove 21. In this way, during the upward movement of the upper cutting knife 3, relative movement will occur between the upper cutting knife 3 and the cleaning scraping knife 4, so that the bottom surface of the cleaning scraping knife 4 automatically scrapes and cleans the tab debris adhering to the cutting edge of the upper cutting knife 3.

[0052] In one embodiment, referring to Figure 2 , a cleaning air knife 5 is further provided on the back surface of the upper cutting knife 3 (referring to the side of the upper cutting knife 3 facing away from the lower cutting knife 2). The air outlet 511 of the cleaning air knife 5 can face the cutting edges of the upper cutting knife 3 and / or the lower cutting knife 2 to blow off the debris adhering to the cutting edges of the upper cutting knife 3 and the lower cutting knife 2. That is to say, it can be understood that through the combination of the cleaning air knife 5 and the above-mentioned cleaning scraping knife 4 in this application, it is ensured that there is no tab debris adhering to the cutting edges of the upper cutting knife 3 and the lower cutting knife 2, thereby reducing the situation of knife jamming and the operation of personnel cleaning the cutting edges of the upper cutting knife 3 and the lower cutting knife 2.

[0053] In one embodiment, referring to Figure 2 and Figure 9, the cleaning air knife 5 includes a fixing member 50 and an air chamber cylinder 51. The fixing member 50 is fixed to the back of the upper cutting knife 3. The shape of the fixing member 50 is not limited here. The air chamber cylinder 51 can be rotatably arranged on the fixing member 50 through damping. The inner cavity of the air chamber cylinder 51 is the air chamber. One end of the air chamber cylinder 51 is closed, and the other end of the air chamber cylinder 51 is provided with an air inlet 510 communicating with the air chamber. The size of the air outlet 511 is 0.1 - 0.2 mm, so that the pressure of the compressed air blown out from the air outlet 511 can be increased. The air outlet 511 is opened on the outer peripheral wall of the air chamber cylinder 51 and communicates with the air chamber. It can be understood from this that the compressed air enters the air chamber through the air inlet 510 and then blows out from the air outlet 511. Since the air chamber cylinder 51 is rotatably arranged on the fixing member 50, the air outlet 511 can realize angle adjustment, so that the air outlet 511 can blow towards the cutting edge of the upper cutting knife 3 or towards the cutting edge of the lower cutting knife 2, thereby blowing off the debris adhering to the cutting edges of the upper cutting knife 3 and the lower cutting knife 2. It should be noted that the fixing member 50 of this embodiment is a rotating cylinder. Of course, an avoidance groove for avoiding the air outlet 511 is opened on the outer wall of the rotating cylinder. In other embodiments, the fixing member 50 can also be of other shapes, which are not limited here. In addition, the air outlet 511 of the cleaning air knife 5 can also blow off the debris adhering to the cleaning scraper 4.

[0054] In summary, the lower cutting knife 2 of the present utility model is equipped with a cleaning scraper 4 to enable the upper cutting knife 3 to have a self-cleaning function, and the debris adhering to the cutting edge of the upper cutting knife 3 can be cleaned in time during each operation. In addition, a cleaning air knife 5 is configured on the upper cutting knife 3 and used in cooperation with the cleaning scraper 4 on the lower cutting knife 2 to ensure that there is no adhesion of tab debris at the cutting edges of the upper cutting knife 3 and the lower cutting knife 2, so that the upper cutting knife 3 and the lower cutting knife 2 have an automatic cleaning function.

[0055] In one embodiment, referring to Figures 11 - 14 , the cutting edge of the upper cutting knife 3 includes a first inclined cutting edge 301, a second inclined cutting edge 302 and a third inclined cutting edge 303. The first inclined cutting edge 301 is parallel to the third inclined cutting edge 303. Taking the lower cutting knife 2 as a reference, the height of the third inclined cutting edge 303 is lower than that of the first inclined cutting edge 301, that is, the distance from the lower cutting knife 2 to the first inclined cutting edge 301 is less than the distance from the lower cutting knife 2 to the third inclined cutting edge 303. Among them, the second inclined cutting edge 302 connects the first inclined cutting edge 301 and the third inclined cutting edge 303. The first inclined cutting edge 301 and the second inclined cutting edge 302 are in the same plane, and the third inclined cutting edge 303 is not in the plane formed by the first inclined cutting edge 301 and the second inclined cutting edge 302. It can be seen from this that the tab cut out by the cooperation of the cutting edge of the upper cutting knife 3 and the cutting edge of the lower cutting knife 2 of this application is the tab as shown in Figure 16 shown, Figure 16The dotted part shown is the cut-off part. The cutting edge of the upper cutting knife 3 is inclined to quickly cut the tab, avoiding the situation that the cutting edge of the upper cutting knife 3 is not sharp during cutting and the tab debris adheres, thus preventing the accumulated tab debris from jamming the knife and affecting the cutting effect. In one embodiment, the specific structure of the frame 1 is as follows: it includes an upper fixing plate 10, a lower fixing plate 11 and at least two connecting guide columns 12; the upper fixing plate 10 and the lower fixing plate 11 are arranged in parallel, each connecting guide column 12 extends in the vertical direction, one end of the connecting guide column 12 is fixedly connected to the lower surface of the upper fixing plate 10, and the other end of the connecting guide column 12 is fixedly connected to the upper surface of the lower fixing plate 11. The connection between the connecting guide column 12 and the upper fixing plate and / or the lower fixing plate 11 is fixed by, but not limited to, welding. Specifically, at least two connecting guide columns 12 are respectively located on the opposite sides of the upper surface of the lower fixing plate 11 and are fixedly connected to the upper surface of the lower fixing plate 11. Exemplarily, four connecting guide columns 12 are provided in this embodiment, and the four are respectively located at the four corners between the upper fixing plate 10 and the lower fixing plate 11. Of course, in other embodiments, two connecting guide columns 12 can also be provided, and the two connecting guide columns 12 are respectively located on the opposite sides between the upper fixing plate 10 and the lower fixing plate 11.

[0056] In one embodiment, the lower cutting assembly further includes a lower sliding table 23 and a first lifting device 27 fixed to the lower fixing plate 11. The lower sliding table 23 is slidably connected to at least two connecting guide columns 12 on the opposite sides in the horizontal second direction. The lower cutting knife 2 is arranged on the lower sliding table 23. The lifting end of the first lifting device 27 is fixedly connected to the lower sliding table 23, so that the lower cutting knife 2 can move up and down under the drive of the first lifting device 27. When the battery cell is positioned between the upper cutting knife 3 and the lower cutting knife 2, the battery cell does not contact the lower cutting knife 2, thereby reducing interference. At the same time, it is ensured that the tab is close to the lower cutting knife 2 during cutting, preventing the battery cell from being pulled and damaged during cutting.

[0057] In one embodiment, referring to Figure 5 , guiding protrusions 31 are arranged on the opposite side surfaces of the upper cutting knife 3 in the horizontal second direction. The guiding protrusions 31 extend in the vertical direction. Guiding portions 26 extending in the vertical direction are arranged on the opposite sides of the lower cutting knife 2 in the horizontal second direction. Guiding grooves 260 extending in the vertical direction are formed on the opposite surfaces of the two guiding portions 26. The guiding grooves 260 are slidably matched with the guiding protrusions 31. In this way, during the up and down movement of the upper cutting knife 3 and the lower cutting knife 2, the movement accuracy can be improved, avoiding the expansion of the gap between the cutting edge of the upper cutting knife 3 and the cutting edge of the lower cutting knife 2, thereby improving the cutting efficiency and reducing the situation of tab debris sticking to the knife. At the same time, the sliding match between the guiding grooves 260 and the guiding protrusions 31 also keeps the upper cutting knife 3 moving vertically and stably, ensuring the quality of tab cutting.

[0058] Of course, in other embodiments, the guiding grooves 260 can also be arranged on the opposite sides of the upper cutting knife 3, while the guiding protrusions 31 are arranged on the guiding part 26 of the lower cutting knife 2. Similarly, the guiding grooves 260 and the guiding protrusions 31 can be slidably matched to improve the movement precision of the upper cutting knife 3 and the lower cutting knife 2, avoid expanding the gap between the cutting edges of the upper cutting knife 3 and the lower cutting knife 2, thereby improving the cutting efficiency and reducing the situation of the ear scraps sticking to the knife; at the same time, keep the upper cutting knife 3 moving vertically and stably to ensure the quality of the ear cutting.

[0059] In one embodiment, referring to Figure 1 , the upper cutting assembly further includes an upper sliding table 32 and a second lifting device 34 fixed to the upper fixing plate 10. A plurality of sliding table guide columns 13 are also slidably arranged on the upper fixing plate 10. The sliding table guide columns 13 penetrate the opposite surfaces of the upper fixing plate 10 and extend in the vertical direction. A limiting boss 130 is arranged at one end of the sliding table guide column 13 facing away from the lower sliding table 23, and the outer diameter of the limiting boss 130 is larger than the outer diameter of the sliding table guide column 13. Among them, the opposite sides of the upper sliding table 32 in the horizontal second direction are respectively slidably connected to at least one connecting guide column 12 and fixedly connected to at least one sliding table guide column 13. The upper cutting knife 3 is arranged on the upper sliding table 32, and the lifting end of the second lifting device 34 is fixedly connected to the upper sliding table 32, so that the upper cutting knife 3 can move up and down under the drive of the first lifting device 27. Specifically, it can be understood that one side of the upper sliding table 32 in the horizontal second direction is slidably connected to two connecting guide columns 12 arranged oppositely in the horizontal first direction, and the other side of the upper sliding table 32 in the horizontal second direction is fixedly connected to two sliding table guide columns 13 arranged oppositely in the horizontal first direction. Under the drive of the first lifting device 27, the upper sliding table 32 moves up and down, and the sliding table guide column 13 moves up and down under the drive of the upper sliding table 32. In this way, the upper cutting knife 3 can move up and down under the drive of the second lifting device 34. It can be seen that the sliding table guide column 13 mainly plays a guiding role, which can ensure that the upper sliding table 32 has a high repeat positioning accuracy during each up and down operation, and there will be no situation of deviation in the left and right, front and back directions, thereby ensuring the stability of the structural movement.

[0060] It should be noted that the first lifting device 27 and the second lifting device 34 are selected as air cylinders. Of course, in other embodiments, the first lifting device 27 and the second lifting device 34 can also be selected as electric push rods, which are not limited here. For those skilled in the art, by reasonably changing the structures of the first lifting device 27 and the second lifting device 34, they should also fall within the protection scope of the present invention.

[0061] In one embodiment, two upper cutting assemblies are provided, and the two upper cutting assemblies are independently arranged. Since one upper cutting assembly includes an upper sliding table 32, a second lifting device 34, and an upper cutting knife 3, the two upper cutting assemblies thus have two upper sliding tables 32, two second lifting devices 34, and two upper cutting knives 3. Correspondingly, two lower cutting knives 2 are arranged on the lower sliding table 23, and the two lower cutting knives 2 correspond to the two upper cutting knives 3 one by one. In this way, the cell tab cutting device of the present application can realize the cutting of the double-ended tabs of the cell, and can also realize the cutting of the single-ended tabs of the cell, improving the applicability of the cell tab cutting device of the present application. It should be noted here that since the two upper sliding tables 32 operate independently and separately, when cutting the double-ended tabs of the cell, it is possible to avoid the positive tab and the negative tab of the double-ended tabs of the cell from contacting and causing a short circuit, playing a role in protecting against the short circuit of the positive and negative tabs of the cell, and at the same time preventing the waste of the positive and negative tabs from interfering with each other and jamming the material.

[0062] It should be noted that the double-ended tabs of the cell refer to the positive tab and the negative tab of the cell being located at one end of the cell; the single-ended tabs of the cell refer to the positive tab and the negative tab of the cell being located at opposite ends of the cell.

[0063] In one embodiment, the cell tab cutting device of the present invention further includes a first insulating fixing plate 24 provided between the lower sliding table 23 and the lower cutting knife 2. The lower cutting knife 2 is fixed on the first insulating fixing plate 24, and the lower cutting knife 2 can be fixed to the upper surface of the first insulating fixing plate 24 by bolts; the first insulating fixing plate 24 is fixed on the lower sliding table 23, and the lower surface of the first insulating fixing plate 24 can be fixed to the upper surface of the lower sliding table 23 by pasting. Since the parts of the frame 1 are metal parts, and the lower sliding table 23 is also a metal part, and the lower cutting knife 2 is also a metal part, therefore, the present application realizes the insulating isolation between the lower cutting knife 2 and the lower sliding table 23 through the first insulating fixing plate 24, so that there is no short circuit when cutting the positive and negative tabs of the cell at the same time, and at the same time preventing the tabs of the cell from conducting with the frame 1, thereby avoiding short circuits when cutting the positive and negative tabs of the cell. Similarly, a second insulating fixing plate 33 is provided between the upper sliding table 32 and the upper cutting knife 3. The upper cutting knife 3 can be fixed to the lower surface of the second insulating fixing plate 33 by bolts, and the second insulating fixing plate 33 can be fixed to the lower surface of the upper sliding table 32 by pasting. The insulating isolation between the upper cutting knife 3 and the upper sliding table 32 is realized through the second insulating fixing plate 33, preventing the tabs of the cell from conducting with the frame 1, thereby avoiding short circuits when cutting the positive and negative tabs of the cell.

[0064] In one embodiment, a material receiving device is further provided on the frame 1. The material receiving device is used to receive the tab waste generated when the upper cutting knife 3 moves relative to the lower cutting knife 2 to cut the tabs. Specifically, referring to Figure 1 and Figure 15, the material receiving device includes a surrounding plate 6 and a material receiving barrel. The surrounding plate 6 is fixed on the upper surface of the first insulating fixing plate 24, and a blanking cavity 60 is enclosed with the lower cutting knife 2. The material receiving barrel is fixed on the lower fixing plate 11. The feeding port of the material receiving barrel is hermetically connected to the bottom surface of the lower sliding table 23. Blanking ports 25 are provided on the lower sliding table 23 and the first insulating fixing plate 24. The blanking port 25 communicates the blanking cavity 60 with the feeding port of the material receiving barrel. It can be seen from this that the tab waste cut off by the interaction of the upper cutting knife 3 and the lower cutting knife 2 enters the material receiving barrel in sequence from the blanking cavity 60, the blanking port 25, and the feeding port of the material receiving barrel, ensuring the cleanliness of the cutting device. Further, the material receiving barrel includes a feeding barrel 7 and a discharging barrel 70. The discharging barrel 70 is fixed on the lower fixing plate 11. The lower end of the discharging barrel 70 is closed, and the upper end of the discharging barrel 70 is an open end. Both ends of the feeding barrel 7 are open ends. One open end of the feeding barrel 7 is the feeding port of the material receiving barrel. The feeding port of the material receiving barrel is hermetically and fixedly connected to the lower surface of the first insulating fixing plate 24, and the feeding port of the material receiving barrel communicates with the blanking port 25. The other open end of the feeding barrel 7 is inserted into the discharging barrel 70 from the open end of the discharging barrel 70. In this way, when the lower sliding block platform moves up and down, it can also ensure that the waste debris is discharged in the closed material barrel, ensuring the cleanliness of the cutting device.

[0065] Of course, in other embodiments, the lower end of the discharging barrel 70 can also penetrate the lower fixing plate 11, and the end of the discharging barrel 70 penetrating the lower fixing plate 11 is an open end. In this way, a waste collection container is connected to the lower open end of the discharging barrel 70, so that the tab waste and the scraped debris after the lower cutting can be discharged to the dedicated waste collection container in time under the action of the cleaning air knife 5 through the upper discharging barrel and the lower discharging barrel, keeping the whole device clean and tidy.

[0066] The working principle of the present utility model:

[0067] The present utility model shows the cutting of the positive and negative tabs of a battery cell with double-head tab output. Before working, the lifting end of the first lifting device 27 retreats to the lower limit position, and the lifting end of the second lifting device 34 retreats to the upper limit position, driving the upper cutting knife 3 fixed on the upper sliding table 32 and the lower cutting knife 2 fixed on the lower sliding table 23 to separate by a certain distance. The battery cell positions the positive or negative tab of the battery cell on the lower cutting knife 2 through the conveying platform, so that the positive or negative tab of the battery cell is located between the upper cutting knife 3 and the lower cutting knife 2;

[0068] After the battery cell is positioned, the lifting end of the first lifting device 27 moves to the upper limit position, moving the lower sliding table 23 and the lower cutting knife 2 upward so that the tab contacts the cutting edge of the lower cutting knife 2;

[0069] After the working positioning of the lower cutting knife 2 is completed, the lifting end of the second lifting device 34 moves to the lower limit position. During the descent of the upper cutting knife 3, the cutting edge of the upper cutting knife 3 cooperates with the cutting edge of the lower cutting knife 2 to shear the tab. The tab starts linear cutting from the lowest point of the cutting edge of the upper cutting knife 3 until it is completely separated from the tab of the battery cell; while the upper cutting knife 3 is descending, it pushes the scraping inclined surface 40 of the cleaning scraper 4, causing the cleaning scraper 4 to retract into the installation groove 21; when the upper cutting knife 3 rises, due to the action of the spring, an extrusion force for extension is generated on the cleaning scraper 4, and the tab debris at the cutting edge of the upper cutting knife 3 is scraped and cleaned through the back surface of the cleaning scraper 4. At the same time, the gas discharged from the air outlet 511 of the cleaning air knife 5 cleans the cutting edges of the upper cutting knife 3, the lower cutting knife 2, and the debris on the cleaning scraper 4;

[0070] The cut tab waste and the scraped debris are discharged into the material receiving bucket under the action of the cleaning air knife 5, keeping the entire tab cutting device clean and tidy.

[0071] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A battery cell tab cutting device, characterized in that: include frame; A lower cutting assembly comprises a lower cutting knife arranged on the frame; An upper cutting assembly comprises an upper cutting knife arranged on a frame and located above a lower cutting knife, the upper cutting knife being able to move up and down relative to the lower cutting knife, a mounting groove being provided below a cutting edge of the lower cutting knife, and a groove direction of the mounting groove being perpendicular to a moving direction of the upper cutting knife; A cleaning scraper comprises a scraper body and a scraper bevel, wherein the scraper body is adapted to the mounting groove, and the scraper body is telescopically arranged in the mounting groove through an elastic member, so that the scraper body can be telescopic relative to the opening direction of the mounting groove, and the scraper bevel is arranged on one side of the scraper body, and the scraper bevel is arranged outside the mounting groove, and the scraper bevel is on the same side as the blade of the lower cutter, and the scraper bevel faces the blade of the upper cutter.

2. The battery cell tab cutting device according to claim 1, characterized in that: The cleaning scraper is provided with a long groove penetrating through its opposite surface, the mounting groove is provided with a locking hole penetrating upward through the lower cutting knife, a positioning piece passing through the long groove is installed in the locking hole, the elastic piece is arranged in the long groove, one end of the elastic piece is connected to the positioning piece, and the other end of the elastic piece is connected to an end of the long groove facing away from the positioning piece.

3. The battery cell tab cutting device according to claim 1, characterized in that: The upper cutting knife is also provided with a cleaning air knife, and the air outlet of the cleaning air knife faces the cutting edges of the upper cutting knife and the lower cutting knife.

4. The battery cell tab cutting device according to claim 3, characterized in that: The cleaning air knife includes a fixing part and an air cavity cylinder, wherein the fixing part is fixed on the upper cutting knife, and the air cavity cylinder is rotatably arranged on the fixing part, and the inner cavity of the air cavity cylinder is an air cavity; one end of the air cavity cylinder is closed, and the other end of the air cavity cylinder is provided with an air inlet communicated with the air cavity, and the air outlet is opened on the outer peripheral wall of the air cavity cylinder and communicated with the air cavity.

5. The battery cell tab cutting device according to claim 1, characterized in that: Guide protrusions are arranged on the opposite side surfaces of the upper cutter, and the guide protrusions extend along the direction in which the upper cutter moves relative to the lower cutter. Guide parts extending along the vertical direction are arranged on the opposite sides of the lower cutter, and guide grooves are arranged on the opposite surfaces of the two guide parts, and the guide grooves extend along the vertical direction. The guide grooves are slidably matched with the guide protrusions.

6. The battery cell tab cutting device according to claim 1, characterized in that: The blade of the upper cutting knife includes a first oblique blade, a second oblique blade and a third oblique blade, the first oblique blade is parallel to the third oblique blade, the third oblique blade is lower than the first oblique blade, the second oblique blade connects the first oblique blade and the third oblique blade, the first oblique blade and the second oblique blade are in the same plane, and the third oblique blade is not in the plane formed by the first oblique blade and the second oblique blade.

7. The battery cell tab cutting device according to claim 1, characterized in that: The frame includes a lower fixing plate and at least two connecting guide posts, wherein the at least two connecting guide posts are respectively located at opposite sides of the lower fixing plate and are connected and fixed to the lower fixing plate, and each connecting guide post extends in a vertical direction; The lower cutting assembly also includes a lower sliding platform and a first lifting device fixed on the lower fixed plate. The opposite sides of the lower sliding platform are respectively slidably connected to at least two connecting guide pillars. The lower cutting knife is arranged on the lower sliding platform. The lifting end of the first lifting device is connected and fixed to the lower sliding platform.

8. The battery cell tab cutting device according to claim 7, characterized in that: The frame also includes an upper fixed plate, which is connected and fixed to one end of the connecting guide column facing away from the lower fixed plate. The upper cutting assembly also includes an upper slide and a second lifting device fixed to the upper fixed plate. The upper fixed plate is also connected to a plurality of slide guide columns extending in a vertical direction. The slide guide columns are slidably penetrated through the upper fixed plate. The opposite sides of the upper slide are respectively slidably connected to at least one of the connecting guide columns and fixedly connected to at least one of the slide guide columns. The upper cutting knife is arranged on the upper slide, and the lifting end of the second lifting device is connected and fixed to the upper slide.

9. The battery cell tab cutting device according to claim 8, characterized in that: It also includes a first insulating fixed plate and a second insulating fixed plate, the first insulating fixed plate is arranged between the lower slide and the lower cutting knife, the lower cutting knife is fixed on the first insulating fixed plate, and the first insulating fixed plate is fixed on the lower slide; the second insulating fixed plate is arranged between the upper slide and the upper cutting knife, the upper cutting knife is fixed on the second insulating fixed plate, and the second insulating fixed plate is fixed on the upper slide.

10. The battery cell tab cutting device according to claim 9, characterized in that: The frame is also provided with a material receiving device, and the material receiving device is used to receive the tab waste generated when the upper cutting knife moves relative to the lower cutting knife to cut the tab.

11. The battery cell tab cutting device according to claim 10, characterized in that: The material receiving device includes a surrounding plate and a material receiving barrel, the surrounding plate is fixed to the upper surface of the first insulating fixed plate, and the surrounding plate and the lower cutting knife enclose a material blanking cavity, the feed port of the material receiving barrel is sealed and fixed to the bottom surface of the lower slide, the lower slide and the first insulating fixed plate are provided with a material blanking port, and the material blanking port connects the material blanking cavity and the feed port of the material receiving barrel.

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