Battery cell slitting mechanism

Abstract

The utility model discloses a battery cell slitting mechanism, including base, at least three slitting clamps and slitting subassembly, the slitting clamps are provided at the top of base, three slitting clamps are provided at interval in proper order from front to back, the slitting subassembly includes the two lift drive unit that is provided at the top of base, and the lift drive unit is provided at the top of base. The two lifting driving units are oppositely arranged in the left-right direction, the three slitting clamps are located between the two lifting driving units, the slitting assembly further comprises a slitting mounting plate and at least two slitting units, the two slitting units are arranged in a front-back spaced mode, the slitting mounting plate is located above the three slitting clamps, and the slitting mounting plate is located above the three slitting clamps. The two ends of the slitting mounting plate are connected with the two lifting driving units correspondingly. The slitting unit comprises a hot cutting wire, a first slitting connecting plate, a second slitting connecting plate, a tensioning mounting plate and a tensioning air cylinder. According to the utility model, the condition of unevenness of a cut can be avoided, and the quality of a slit single battery cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, specifically to a cell cutting mechanism. Background Technology

[0002] In lithium battery manufacturing, the multi-layer stacking process can produce multiple cells at once. The multi-layer stacking process generally includes a stacking step and a slitting step. In the stacking step, typically, a first separator 1 is stacked on a stacking table. Then, multiple negative electrode sheets, for example, three negative electrode sheets, are stacked on the first separator 1, spaced apart. Next, a second separator 1 is stacked on the three negative electrode sheets. Then, multiple positive electrode sheets 2, for example, three positive electrode sheets, are stacked on the second separator 1, spaced apart. Finally, a third separator 1 is stacked on the three positive electrode sheets, and this process is repeated to obtain a multi-layer stacked cell. Figure 1 As shown, there are two gaps 3 between the electrodes of the multi-laminated cell. The multi-laminated cell is then transferred to the cell slitting mechanism, which cuts the separator 1 from the two gaps 3 of the multi-laminated cell, thereby splitting the multi-laminated cell into multiple, for example, three individual cells.

[0003] Existing battery cell slitting mechanisms generally include a base, at least three slitting clamps for fixing the battery cells, and a slitting assembly. The slitting clamps are located at the top of the base, and the three slitting clamps are arranged alternately from front to back. The slitting assembly includes two lifting drive units and at least two hot cutting wires located at the top of the base. The two lifting drive units are arranged opposite each other from left to right, and the three slitting clamps are located between the two lifting drive units. The two hot cutting wires are arranged alternately from front to back and located above the three slitting clamps. The two ends of the hot cutting wires are connected to the two lifting drive units respectively. In practical applications, after the multi-layer battery cell is fixed by the three slitting clamps, the two hot cutting wires correspond to the two gaps 3 of the multi-layer battery cell. Then, the two lifting drive units drive the two hot cutting wires to move downwards. In this way, the two hot cutting wires can cut the diaphragm 1 from the two gaps 3 respectively, thereby realizing the slitting of the multi-layer battery cell into three individual battery cells.

[0004] In the above structure, the length of the hot cutting wire often increases due to the high temperature after being energized and heated, which causes the hot cutting wire to become loose. When the hot cutting wire cuts the separator 1 of the multi-layer battery cell, the cut is easy to be uneven, which will affect the quality of the individual battery cells after slitting. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a cell cutting mechanism, which can avoid uneven cuts and improve the quality of the individual cells after cutting.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A battery cell slitting mechanism includes a base, at least three slitting clamps, and a slitting assembly. The slitting clamps are disposed at the top of the base, and the three slitting clamps are arranged alternately from front to back. The slitting assembly includes two lifting drive units disposed at the top of the base, arranged facing each other from left to right, with the three slitting clamps located between the two lifting drive units. The slitting assembly also includes a slitting mounting plate and at least two slitting units, arranged alternately from front to back. The slitting mounting plate is located above the three slitting clamps, and its two ends are respectively connected to the two lifting drive units. Each slitting unit includes a hot-cutting wire, a first slitting connecting plate, a second slitting connecting plate, a tensioning mounting plate, and a tensioning cylinder. The hot-cutting wire of the two slitting units... The slits are located between two adjacent slitting fixtures. The two ends of the hot-cut slits protrude from the two ends of the slitting fixtures and are connected to the bottom ends of the first slitting connecting plate and the second slitting connecting plate, respectively. The top end of the first slitting connecting plate is located at the bottom end of the slitting mounting plate. The tensioning mounting plate is located at the bottom end of the slitting mounting plate and is located behind the second slitting connecting plate. A tensioning connecting block is slidably arranged on the side of the tensioning mounting plate near the second slitting connecting plate. The top end of the second slitting connecting plate is connected to the tensioning connecting block. A tensioning cylinder is located on the side of the tensioning mounting plate near the second slitting connecting plate and its output end is connected to the tensioning connecting block. The tensioning cylinder is used to drive the tensioning connecting block to move left and right.

[0008] As a preferred technical solution, the top of the first slitting connecting plate is provided with a first fixing block, and a second fixing block is provided on one side of the first fixing block. The second fixing block is detachably disposed at the bottom of the slitting mounting plate. The bottom of the slitting mounting plate is provided with a first slitting slide rail corresponding to the first slitting connecting plate of the two slitting units. The two ends of the first slitting slide rail are respectively connected to the two sides of the slitting mounting plate. The top of the first fixing block is provided with a first slitting slider, and the first slitting sliders of the two slitting units are respectively slidably engaged with the first slitting slide rail.

[0009] As a preferred technical solution, the top of the tensioning mounting plate is provided with a third fixing block, and a fourth fixing block is provided on one side of the third fixing block. The fourth fixing block is detachably mounted on the bottom of the slitting mounting plate. The bottom of the slitting mounting plate is provided with a second slitting slide rail corresponding to the tensioning mounting plates of the two slitting units. The two ends of the second slitting slide rail are respectively connected to the two sides of the slitting mounting plate. The top of the third fixing block is provided with a second slitting slider. The second slitting sliders of the two slitting units are respectively slidably engaged with the second slitting slide rail.

[0010] As a preferred technical solution, the top of the base is provided with two front and rear drive units arranged in a left-right opposite manner, and two lifting drive units are respectively arranged on the top of the two front and rear drive units. The two front and rear drive units are used to drive the two lifting drive units to move back and forth.

[0011] As a preferred technical solution, the lifting drive unit includes a lifting linear module, and the two ends of the split mounting plate are respectively connected to the lifting linear modules of the two lifting drive units. The front and rear drive units include front and rear linear modules, which are disposed at the top of the base. The lifting linear modules of the two lifting drive units are respectively disposed at the top of the front and rear linear modules of the two front and rear drive units.

[0012] As a preferred technical solution, the slitting assembly further includes a cleaning unit. The cleaning unit includes a cleaning motor, a timing belt structure, a cleaning mounting plate, and two cleaning connecting plates arranged opposite each other. The cleaning motor is located at the top of the slitting mounting plate and close to one end of the plate. The timing belt structure includes a driving pulley, a driven pulley, and a timing belt sleeved on the outer periphery of the driving and driven pulleys. The driving pulley is sleeved on the outer periphery of the output end of the cleaning motor. The driven pulley is rotatably located at the top of the slitting mounting plate and close to the other end of the plate. The cleaning mounting plate is slidably located at the top of the slitting mounting plate, with both ends protruding from the sides of the plate. The cleaning mounting plate is positioned on the timing belt. Below and connected to the synchronous belt, the slitting mounting plate is located between two cleaning connecting plates. The top ends of the two cleaning connecting plates are respectively connected to the two ends of the cleaning mounting plate. The bottom ends of the two cleaning connecting plates are connected by a mounting rod. The mounting rod is located above the two hot cutting wires. Two scrapers corresponding to the hot cutting wires are slidably sleeved on the outer periphery of the mounting rod. The scrapers can move along the mounting rod. The hot cutting wires are located between the two corresponding scrapers. The sides of the two scrapers that are close to each other abut against the two sides of the corresponding hot cutting wires. Two pressure blocks corresponding to the two scrapers are fixedly sleeved on the outer periphery of the mounting rod. The two scrapers are located between the two corresponding pressure blocks. The two scrapers and the two corresponding pressure blocks are respectively connected by elastic elements, which are in a compressed state.

[0013] As a preferred technical solution, the scraper is provided with a scraper through hole that extends through both sides of it. The scraper is sleeved on the outer periphery of the mounting rod through the scraper through hole. A linear bearing is provided in the scraper through hole, and the linear bearing is sleeved on the outer periphery of the mounting rod.

[0014] As a preferred technical solution, the slitting fixture includes a fixture mounting plate, a lower clamping mounting seat, a pad, an upper clamping mounting seat, a pressure plate, and two lifting cylinders arranged side-by-side. The fixture mounting plate is located at the top of the base. The lower clamping mounting seat and the two lifting cylinders are respectively located at the top of the fixture mounting plate. The lower clamping mounting seat is located between the two lifting cylinders. The pad is located at the top of the lower clamping mounting seat. The top of the pad has multiple pad clearance grooves, which are spaced apart from left to right. The pressure plate is positioned above the pad and opposite to it. The pressure plate is located at the bottom end of the upper pressure mounting base. The bottom end of the pressure plate is provided with multiple pressure plate clearance grooves. The multiple pressure plate clearance grooves are arranged alternately from left to right and extend to the upper pressure mounting base. The multiple pressure plate clearance grooves and the multiple pad clearance grooves correspond one-to-one. The output ends of two lifting cylinders are respectively connected to the two ends of the upper pressure mounting base. The two lifting cylinders are used to drive the upper pressure mounting base to move up and down.

[0015] As a preferred technical solution, the slitting fixture further includes two support seats arranged opposite each other on the left and right. The two support seats are respectively located at the top of the fixture mounting plate, and two lifting cylinders are located between the two support seats. The two ends of the upper pressing mounting seat are slidably connected to the adjacent side of the two support seats respectively.

[0016] As a preferred technical solution, the cell cutting mechanism further includes a front-back moving component, the bottom end of the base is disposed at the top end of the front-back moving component, and the front-back moving component is used to drive the base to move back and forth.

[0017] The beneficial effects of this utility model are as follows: The slitting assembly of this utility model includes a slitting mounting plate and at least two slitting units. Each slitting unit includes a hot-cutting wire, a first slitting connecting plate, a second slitting connecting plate, a tensioning mounting plate, and a tensioning cylinder. The tensioning cylinder drives the second slitting connecting plate to move to the right, thereby causing the end of the hot-cutting wire connected to the bottom end of the second slitting connecting plate to move to the right. This allows the hot-cutting wire to be tensioned, ensuring that it remains taut. In this way, when cutting the separator of the multi-layer battery cell with the hot-cutting wire, uneven cuts can be avoided, thus improving the quality of the individual battery cells after slitting. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a top view of a multi-layer battery cell;

[0020] Figure 2 This is a schematic diagram of the structure of a battery cell cutting mechanism provided in one embodiment of the present invention;

[0021] Figure 3 yes Figure 2 An exploded view of the battery cell cutting mechanism shown.

[0022] Figure 4 yes Figure 2 A schematic diagram of the slitting fixture of the battery cell slitting mechanism shown;

[0023] Figure 5 yes Figure 4 An exploded view of the cutting fixture shown.

[0024] Figure 6 yes Figure 2 The diagram shows the structure of the cell slitting mechanism after removing the two lifting drive units and the synchronous belt;

[0025] Figure 7 yes Figure 6 A magnified view of a portion at point A shown;

[0026] Figure 8 yes Figure 6 The exploded view of the slitting assembly after removing the two lifting drive units and the timing belt is shown.

[0027] Figure 9 yes Figure 8 The diagram shows the structure of the first cutting slide rail and the first cutting slider, the first fixing block and the second fixing block of the two cutting units.

[0028] Figure 10 yes Figure 8 The diagram shows the structure of the second cutting slide rail and the second cutting slider, third fixing block, fourth fixing block, tension mounting plate, tension cylinder, and tension connecting block of the two cutting units.

[0029] Figure 11 yes Figure 6 Right view of the mounting rod, scraper, and pressure block of the cleaning unit shown;

[0030] Figure 12 yes Figure 11 An exploded view of the mounting rod, scraper, and pressure block of the cleaning unit shown. Detailed Implementation

[0031] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0032] Please refer to Figure 2 and Figure 3 This utility model provides a battery cell slitting mechanism, including a base 10, three slitting clamps 20 for fixing multi-layer battery cells, a slitting assembly 30, and a front-to-back moving assembly 60. It is understood that the number of slitting clamps 20 can also be other, and can be set according to actual conditions.

[0033] A forward and backward moving assembly 60 is used to mount the base on the machine platform. The bottom end of the base 10 is located at the top of the forward and backward moving assembly 60 and is slidably mounted on the machine platform. The forward and backward moving assembly 60 is used to drive the base 10 to move forward and backward. A slitting fixture 20 is located at the top of the base 10, and three slitting fixtures 20 are arranged alternately from front to back. A slitting assembly 30 is located at the top of the base 10. The forward and backward movement of the base 10 can drive the three slitting fixtures 20 and the slitting assembly 30 to move forward and backward. By driving the base 10 to move forward and backward through the forward and backward moving assembly 60, the forward and backward position of the base 10 can be adjusted, and in turn, the forward and backward positions of the three slitting fixtures 20 and the slitting assembly 30 can be adjusted.

[0034] The forward and backward moving assembly 60 includes a linear moving module 61, which is used to be mounted on the machine base. The base 10 is mounted on the top of the linear moving module 61, and the linear moving module 61 is used to drive the base 10 to move forward and backward.

[0035] Combination Figure 4 and Figure 5As shown, the slitting fixture 20 includes a fixture mounting plate 21, a lower clamping mounting base 22, a pad 23, a T-shaped upper clamping mounting base 24, a pressure plate 25, and two lifting cylinders 26 arranged opposite each other. The fixture mounting plate 21 is located at the top of the base 10. The lower clamping mounting base 22 and the two lifting cylinders 26 are respectively located at the top of the fixture mounting plate 21. The lower clamping mounting base 22 is located between the two lifting cylinders 26. The pad 23 is located at the top of the lower clamping mounting base 22 and is used to support the multi-layer battery cells and the slitting individual battery cells. The top of the pad 23 is provided with multiple pad clearance grooves 231, which are arranged sequentially from left to right and extend to the lower clamping mounting base 22. The number of pad clearance grooves 231 corresponds to the number of grippers of the upper battery cell robot and the lower battery cell robot. The pressure plate 25 is located above and opposite to the pad 23. The upper clamping mounting base 24 is located above the pressure plate 25, and the pressure plate 25 is located at the bottom end of the upper clamping mounting base 24. The bottom end of the pressure plate 25 has multiple pressure plate clearance grooves 251, which are spaced apart from left to right and extend to the upper clamping mounting base 24. Each pressure plate clearance groove 251 corresponds to one of the pad clearance grooves 231. The output ends of two lifting cylinders 26 are connected to both ends of the upper clamping mounting base 24, and the two lifting cylinders 26 drive the upper clamping mounting base 24 to move up and down, thereby causing the pressure plate 25 to move up and down. Multiple pad clearance slots 231 and corresponding pressure plate clearance slots 251 are used to allow clearance between the multiple grippers of the upper and lower battery cell robotic arms, facilitating the upper battery cell robotic arm to place the multi-layer battery cells on the top of the pad 23 and the lower battery cell robotic arm to remove the slit individual battery cells from the top of the pad 23. In actual application, the distance between the front side of the pad 23 of the first slitting fixture 20 and the rear side of the pad 23 of the last slitting fixture 20 is the same as the width of the multi-layer battery cell. The size of the pressure plate 25 is adapted to the size of the pad 23.

[0036] Furthermore, the slitting fixture 20 also includes two support seats 27 arranged opposite each other, with the two support seats 27 respectively located at the top of the fixture mounting plate 21, and two lifting cylinders 26 located between the two support seats 27. The two ends of the upper clamping mounting seat 24 are slidably connected to the adjacent sides of the two support seats 27. The two support seats 27 provide support for the up-and-down movement of the upper clamping mounting seat 24, thereby ensuring the stability of the up-and-down movement of the upper clamping mounting seat 24. Specifically, two support slide rails 242 are respectively provided on the adjacent sides of the two support seats 27, with the length direction of the support slide rails 242 being the same as the height direction of the support seats 27. Two support sliders 243 are slidably engaged with the two support slide rails 242, and two support mounting blocks 241 are respectively provided on the adjacent sides of the two support sliders 243. The two ends of the upper clamping mounting seat 24 are respectively located at the top of the two support mounting blocks 241.

[0037] Combination Figures 6 to 12 As shown, the slitting assembly 30 includes two lifting drive units disposed at the top of the base 10, a slitting mounting plate 32, two slitting units, and a cleaning unit. The number of slitting units can also be other numbers, depending on the actual situation. The number of slitting units is one less than the number of slitting clamps 20. The two lifting drive units are arranged facing each other from left to right, and the three slitting clamps 20 are located between the two lifting drive units. The two slitting units are arranged with a front-to-back gap, and the slitting mounting plate 32 is located above the three slitting clamps 20, with both ends of the slitting mounting plate 32 connected to the two lifting drive units respectively. The two lifting drive units are used to drive the slitting mounting plate 32 to move up and down.

[0038] The slitting unit includes a flat hot-cutting wire 331, a first slitting connecting plate 332, a second slitting connecting plate 333, a tensioning mounting plate 334, and a tensioning cylinder 335. The hot-cutting wire 331 heats up when energized. The hot-cutting wires 331 of the two slitting units are located between two adjacent slitting fixtures 20. The first slitting connecting plate 332 and the second slitting connecting plate 333 are arranged facing each other from left to right. The two ends of the hot-cutting wire 331 protrude from the two ends of the slitting fixture 20 and are connected to the bottom ends of the first slitting connecting plate 332 and the second slitting connecting plate 333, respectively. In this embodiment, the two ends of the hot-cutting wire 331 are respectively disposed through two hot-cutting wire fixing blocks 3311. The hot-cutting wire 331 and the two hot-cutting wire fixing blocks 3311 are fixed relative to each other. The two ends of the hot-cutting wire 331 are respectively used for electrical connection with the control system. The control system can control the power supply to the hot-cutting wire 331, thereby enabling the hot-cutting wire 331 to be energized and heat up. A first mounting groove is provided on one side of the bottom end of the first slitting connecting plate 332, and a second mounting groove is provided on one side of the bottom end of the second slitting connecting plate 332. Two hot-cutting wire fixing blocks 3311 are respectively disposed in the first mounting groove and the second mounting groove. A first limiting block 3321 corresponding to the first mounting groove is provided on one side of the bottom end of the first slitting connecting plate 332, and a second limiting block 3331 corresponding to the second mounting groove is provided on one side of the bottom end of the second slitting connecting plate 333. The first limiting block 3321 and the second limiting block 3331 are respectively used to limit the two hot-cutting wire fixing blocks 3311 at both ends of the hot-cutting wire 331 in the first mounting groove and the second mounting groove.

[0039] In this embodiment, in the two cutting units, the front cutting unit has a first mounting groove and a first limiting block 3321 on the rear side of the bottom end of its first cutting connecting plate 332, and a second mounting groove and a second limiting block 3331 on the rear side of the bottom end of its second cutting connecting plate 333. The rear cutting unit has the aforementioned first mounting groove and first limiting block 3321 on the front side of the bottom end of its first cutting connecting plate 332, and a second mounting groove and a second limiting block 3331 on the front side of the bottom end of its second cutting connecting plate 333. It is understood that the positions of the first mounting groove, the first limiting block 3321, the second mounting groove, and the second limiting block 3331 do not constitute a limitation on this utility model.

[0040] The top end of the first slitting connecting plate 332 is located at the bottom end of the slitting mounting plate 32. The tensioning mounting plate 334 is located at the bottom end of the slitting mounting plate 32 and is positioned behind the second slitting connecting plate 333. A tensioning connecting block 336 is slidably mounted on the side of the tensioning mounting plate 334 near the second slitting connecting plate 333 via a conventional slide rail and a slider that slides in cooperation with the slide rail. The top end of the second slitting connecting plate 333 is connected to the tensioning connecting block 336. The tensioning cylinder 335 is located to the left of the tensioning connecting block 336. The tensioning cylinder 335 is set on the side of the tensioning mounting plate 334 near the second cutting connecting plate 333. The output end of the tensioning cylinder 335 is connected to the tensioning connecting block 336. The tensioning cylinder 335 is used to drive the tensioning connecting block 336 to move left and right, thereby driving the second cutting connecting plate 333 to move left and right, thereby driving the end of the hot-cut wire 331 connected to the bottom end of the second cutting connecting plate 333 to move left and right. Through the second cutting connecting plate 333, the end of the hot-cut wire 331 connected to the bottom end of the second cutting connecting plate 333 is driven to move to the right, thereby tensioning the hot-cut wire 331 and keeping it in a taut state. The up-and-down movement of the slitting mounting plate 32 can drive the hot cutting wire 331, the first slitting connecting plate 332, the second slitting connecting plate 333, the tension mounting plate 334, the tension cylinder 335, and the tension connecting block 336 of the two slitting units to move up and down.

[0041] In this embodiment, a first fixing block 3322 is provided at the top of the first slitting connecting plate 332, and a second fixing block 3323 is provided on one side of the first fixing block 3322. The second fixing block 3323 is detachably disposed at the bottom of the slitting mounting plate 32. A first slitting slide rail 323 corresponding to the first slitting connecting plates 332 of the two slitting units is provided below the slitting mounting plate 322. The length direction of the first slitting slide rail 323 is the same as the width direction of the slitting mounting plate 32. The two ends of the first slitting slide rail 323 are respectively connected to the two sides of the slitting mounting plate 32 through two first slitting mounting parts 3231. A first slitting slider 324 is provided at the top of the first fixing block 3322, and the first slitting sliders 324 of the two slitting units slide in cooperation with the first slitting slide rail 323. A third fixing block 3341 is provided at the top of the tensioning mounting plate 334, and a fourth fixing block 3342 is provided on one side of the third fixing block 3341. The fourth fixing block 3342 is detachably disposed at the bottom of the slitting mounting plate 32. Below the slitting mounting plate 32, there is a second slitting slide rail 325 corresponding to the tension mounting plates 334 of the two slitting units. The length direction of the second slitting slide rail 325 is the same as the width direction of the slitting mounting plate 32. The two ends of the second slitting slide rail 325 are respectively connected to the two sides of the slitting mounting plate 32 through two second slitting mounting parts 3251. The top of the third fixing block 3341 is provided with a second slitting slider 326. The second slitting sliders 326 of the two slitting units are respectively slidably engaged with the second slitting slide rail 325.

[0042] In this embodiment, the front cutting unit has a second fixing block 3323 on the rear side of the first fixing block 3322 and a fourth fixing block 3342 on the front side of the third fixing block 3341. The rear cutting unit has a second fixing block 3323 on the front side of the first fixing block 3322 and a fourth fixing block 3342 on the rear side of the third fixing block 3341.

[0043] The above structure allows for individual adjustment of the front and rear positions of the hot-cutting wires 331 in the two slitting units, ensuring that the width of the multiple individual battery cells after slitting is consistent. For example, when the hot-cutting wire 331 of the front slitting unit is positioned further back, the second fixing block 3322 and the fourth fixing block 3342 of the slitting unit are first removed from the slitting mounting plate 32. Then, the first slitting slider 324 of the slitting unit moves forward along the first slitting slide rail 323, and the second slitting slider 326 moves forward along the second slitting slide rail 325, thereby driving... The first fixing block 3322, the second fixing block 3323, the third fixing block 3341, the fourth fixing block 3342, the first cutting connecting plate 332, the second cutting connecting plate 333, the hot cutting wire 331, the tensioning mounting plate 334, the tensioning cylinder 335, and the tensioning connecting block 336 of the cutting unit located at the front are moved forward to the predetermined position. Then, the second fixing block 3322 and the fourth fixing block 3342 of the cutting unit are reinstalled at the bottom end of the cutting mounting plate 32. In this way, the front and rear position of the hot cutting wire 331 of the cutting unit located at the front is adjusted. When the hot-cutting wire 331 of the front slitting unit is positioned forward, first remove the second fixing block 3322 and the fourth fixing block 3342 of the slitting unit from the slitting mounting plate 32. Then, move the first slitting slider 324 of the slitting unit backward along the first slitting slide rail 323 and the second slitting slider 326 along the second slitting slide rail 325. This will cause the first fixing block 3322, the second fixing block 3323, the third fixing block 3341, the fourth fixing block 3342, the first slitting connecting plate 332, the second slitting connecting plate 333, the hot-cutting wire 331, the tension mounting plate 334, the tension cylinder 335, and the tension connecting block 336 of the slitting unit to move backward. Then, reinstall the second fixing block 3323 and the fourth fixing block 3342 of the slitting unit at the bottom of the slitting mounting plate 32. In this way, the front and rear positions of the hot-cutting wire 331 of the front slitting unit are adjusted. The adjustment steps for the front and rear positions of the hot-cutting wire 331 in the rear slitting unit are the same as those described above, and will not be repeated here.

[0044] The second fixing block 3323 is detachably mounted on the bottom end of the slitting mounting plate 32. Specifically, the top end of the second fixing block 3323 is provided with a first clearance groove 33231 for avoiding the first slitting slide rail 323. The top end of the second fixing block 3323 is provided with two first mounting holes 33232 on both sides of the first clearance groove 33231. The first mounting holes 33232 are screw holes. The bottom end of the slitting mounting plate 32 is provided with two first waist holes 32a corresponding to the two first mounting holes 33232 respectively. The first waist holes 32a penetrate the top end of the slitting mounting plate 32. The length direction of the first waist holes 32a is the same as the width direction of the slitting mounting plate 32. First fasteners, such as screws, are installed in the first mounting holes 33232 and the corresponding first waist holes 32a. The head of the first fastener abuts against the top end of the slitting mounting plate 32. The fourth fixing block 3342 is detachably mounted at the bottom of the slitting mounting plate 32. Specifically, the top of the fourth fixing block 3342 is provided with a second clearance groove 33421 for avoiding the second slitting slide rail 325. The top of the fourth fixing block 3342 is provided with two second mounting holes 33422 on both sides of the second clearance groove 33421. The second mounting holes 33422 are screw holes. The bottom of the slitting mounting plate 32 is provided with two second waist holes 32b corresponding to the two second mounting holes 33422 respectively. The second waist holes 32b penetrate the top of the slitting mounting plate 32. The length direction of the second waist holes 32b is the same as the width direction of the slitting mounting plate 32. Second fasteners, such as screws, are installed in the second mounting holes 33422 and the corresponding second waist holes 32b. The head of the second fastener abuts against the top of the slitting mounting plate 32. When adjusting the front and rear positions of the hot-cut wires 331 of the two slitting units individually, the first and second fasteners of the slitting unit can be loosened first to separate the heads of the first and second fasteners from the top of the slitting mounting plate 32. Then, the first slitting slider 324 of the slitting unit can be moved along the first slitting slide rail 323 and the second slitting slider 326 can be moved along the second slitting slide rail 325. After adjustment, the first and second fasteners of the slitting unit can be tightened so that the heads of the first and second fasteners abut against the top of the slitting mounting plate 32. This eliminates the need to remove the second fixing block 3323 and the fourth fixing block 3342 of the slitting unit from the bottom of the slitting mounting plate 32, saving adjustment time and improving production efficiency.

[0045] The cleaning unit includes a cleaning motor 361, a timing belt structure, a cleaning mounting plate 365, and two cleaning connecting plates 366 arranged in a front-to-back configuration. The cleaning motor 361 is mounted on the top of the slitting mounting plate 32 via a motor plate 3611 and is close to one end of the slitting mounting plate 32. The timing belt structure includes a drive pulley 362, a driven pulley 363, and a timing belt 364 sleeved around the outer periphery of the drive pulley 362 and the driven pulley 363. The drive pulley 362 and the driven pulley 363 are arranged left-right opposite each other. The drive pulley 362 is sleeved around the output end of the cleaning motor 361, and the driven pulley 363 is rotatably mounted on the top of the slitting mounting plate 32 and close to the other end of the slitting mounting plate 32. In this embodiment, a drive pulley protective cover 3621 is sleeved around the outer periphery of the drive pulley 362. The drive pulley protective cover 3621 is mounted on the motor plate 3611 and provides protection for the drive pulley 362. The top of the slitting mounting plate 32 is provided with a driven wheel mounting plate 3632. The driven wheel 363 is rotatably mounted on the driven wheel mounting plate 3632. A driven wheel protective cover 3631 is sleeved on the outer periphery of the driven wheel 363 and the driven wheel mounting plate 3632. The driven wheel protective cover 3631 is mounted on the driven wheel mounting plate 3632 and provides protection for the driven wheel 363.

[0046] The cleaning mounting plate 365 is slidably disposed on the top of the slitting mounting plate 32, with both ends of the cleaning mounting plate 365 protruding from the sides of the slitting mounting plate 32. Specifically, the top of the slitting mounting plate 32 has two cleaning slide rails 321 spaced back-to-back, and the bottom of the cleaning mounting plate 365 has two cleaning sliders 322 that slidably engage with the two cleaning slide rails 321. The cleaning mounting plate 365 is located below and connected to the timing belt 364. Specifically, the top of the cleaning mounting plate 365 has a timing belt mounting block 3651, and the side of the timing belt mounting block 3651 closest to the cleaning mounting plate 365 has teeth. The timing belt 364 is sandwiched between the teeth of the timing belt mounting block 3651 and the cleaning mounting plate 365. The slitting mounting plate 32 is located between two cleaning connecting plates 366. The top ends of the two cleaning connecting plates 366 are respectively connected to the two ends of the cleaning mounting plate 365. The bottom ends of the two cleaning connecting plates 366 are connected by a mounting rod 3681, which is located above the two hot cutting wires 331. Two scrapers 367 corresponding to the hot cutting wires 331 are slidably sleeved on the outer periphery of the mounting rod 3681. The scrapers 367 can move along the mounting rod 3681, and the hot cutting wires 331 are located between the two corresponding scrapers 367. The sides of the two scrapers 367 that are close to each other abut against the two sides of the corresponding hot cutting wires 331. The outer periphery of the mounting rod 3681 is fixedly fitted with two pressure blocks 368 corresponding to the two scrapers 367. The two scrapers 367 are located between the two pressure blocks 368. The two scrapers 367 and the two pressure blocks 368 are connected by elastic elements 3671. The elastic element 3671 is a spring. The elastic element 3671 is in a compressed state, so that the side of the two scrapers 367 that is close to each other can abut against the two sides of the corresponding hot cutting wire 331 respectively.

[0047] In this embodiment, the elastic element 3671 is sleeved on the outer periphery of the guide post 3673. One end of the guide post 3673 is disposed in the through hole 3682 of the corresponding pressure block 368, and the other end of the guide post 3673 is inserted into the through hole 3674 of the corresponding scraper 367. One end of the elastic element 3671 is connected to one end of the guide post 3673, and the other end of the elastic element 3671 is connected to the inner wall of the through hole 3674 of the corresponding scraper 367. The guide post 3673 serves to guide the elastic element 3671.

[0048] The scraper 367 has a scraper through hole that extends through both sides. The scraper 367 is sleeved on the outer periphery of the mounting rod 3671 through the scraper through hole. A linear bearing 3672 is provided in the scraper through hole. The linear bearing 3672 is sleeved on the outer periphery of the mounting rod 3671 and can provide moving support for the scraper 367.

[0049] The bottom ends of the two cleaning connection plates 366 are respectively provided with two bottom mounting blocks 3661, and the aforementioned mounting rod 3681 is provided between the two bottom mounting blocks 3661.

[0050] In this embodiment, there are two mounting rods 3681, which are spaced apart from each other. The number of scraper through holes in the scraper 367 corresponds to the number of mounting rods 3681. The two scrapers 367 and the corresponding two pressure blocks 368 are connected by two elastic elements 3671, and the number of pressure block through holes 3682, scraper through holes 3674, and guide posts 3673 corresponds to the number of elastic elements 3671.

[0051] The cleaning motor 361 drives the drive wheel 362 to rotate, which in turn drives the driven wheel 363 and the synchronous belt 364 to rotate. This causes the cleaning mounting plate 365 to move left and right at the top of the cutting mounting plate 32, which in turn causes the two cleaning connecting plates 366, the mounting rod 3681, the scraper 367 on the mounting rod 3681, and the pressure block 368 on the mounting rod 3681 to move left and right. By utilizing the friction between the hot-cutting wire 331 and the two scrapers 367 corresponding to the hot-cutting wire 331, foreign objects such as diaphragm debris remaining on both sides of the hot-cutting wire 331 can be scraped off, thereby cleaning the hot-cutting wire 331 and ensuring the quality of multiple individual battery cells after the next cutting.

[0052] Furthermore, the top of the base 10 is provided with two front-to-back drive units arranged in a left-right orientation, and two lifting drive units are respectively located on top of the two front-to-back drive units. The two front-to-back drive units are used to drive the two lifting drive units to move back and forth. The back-to-back movement of the two lifting drive units can drive the slitting mounting plate 32, the two slitting units, and the cleaning unit to move back and forth. By driving the two slitting units to move back and forth, the front-to-back position of the hot cutting wires 331 of the two slitting units of the slitting assembly 30 can be adjusted simultaneously, thereby ensuring that the width of the multiple individual battery cells after slitting is consistent.

[0053] In this embodiment, the lifting drive unit includes a lifting linear module 31. Both ends of the slitting mounting plate 32 are respectively connected to the lifting linear modules 31 of the two lifting drive units. The lifting linear modules 31 of the two lifting drive units are used to drive the slitting mounting plate 32 to move up and down. The front and rear drive unit includes front and rear linear modules 50, which are disposed at the top of the base 10. The lifting linear modules 31 of the two lifting drive units are respectively disposed at the top of the front and rear linear modules 50 of the two front and rear drive units. The front and rear linear modules 50 of the two front and rear drive units are used to drive the lifting linear modules 31 of the two lifting drive units to move back and forth.

[0054] With the above structure, in practical applications, the two lifting drive units first drive the slitting mounting plate 32, the two slitting units, and the cleaning unit to move upwards, so that the hot-cut wires 331 of the two slitting units are positioned above the three slitting fixtures 20. Then, the two lifting cylinders 26 of the slitting fixtures 20 drive the upper pressing mounting base 24 and the pressure plate 25 to move upwards, so that the space between the pressure plate 25 and the pad 23 increases, making it easier for the battery cell robot to place the multi-layer battery cells on the top of the pad 23 of the three slitting fixtures 20. Then, the battery cell loading robot places the multi-layered battery cell on the top of the pads 23 of the three slitting jigs 20, aligning one side of the multi-layered battery cell with the front side of the pad 23 of the first slitting jig 20 and the other side with the rear side of the pad 23 of the last slitting jig 20. At this time, the two gaps 3 of the multi-layered battery cell correspond to the hot cutting wires 331 of the two slitting units, respectively. The multiple pad clearance grooves 231 of the pad 23 and the multiple pressure clearance grooves 251 of the pressure plate 25 can respectively avoid the multiple grippers of the battery cell loading robot. Then, the two lifting cylinders 26 of the slitting jig 20 drive the upper pressing mounting base 24 and the pressure plate 25 to move downward, so as to press the multi-layered battery cell tightly through the pressure plates 25 of the three slitting jigs 20, thus fixing the multi-layered battery cell. After that, the multiple grippers of the battery cell loading robot release the multi-layered battery cell and exit the battery cell slitting mechanism. Then, the tensioning cylinder 335 of the slitting unit drives the tensioning connecting block 336 and the second slitting connecting plate 333 to move to the right, thereby moving the end of the hot-cutting wire 331 connected to the bottom of the second slitting connecting plate 333 to the right, thus tensioning the hot-cutting wire 331 and keeping it in a taut state. Then, the two lifting drive units drive the slitting mounting plate 32, the two slitting units, and the cleaning unit to move downward. During the downward movement of the two hot-cutting wires 331 of the slitting units, the hot-cutting wires 331 of the two slitting units can cut the diaphragm 1 of the multi-layer battery cell from the two gaps 3 of the multi-layer battery cell, thereby obtaining three individual battery cells. At this time, each individual battery cell is fixed by a slitting fixture 20. Then, the two lifting drive units drive the slitting mounting plate 32, the two slitting units, and the cleaning unit to move upward, so that the hot-cutting wires 331 of the two slitting units are above the three slitting fixtures 20. Then, the two lifting cylinders 26 of the slitting fixture 20 drive the upper clamping mounting base 24 and the pressure plate 25 to move upward, so as to release the three individual battery cells. Then, the battery cell unloading robot removes the three slitting individual battery cells from the top of the corresponding pad plate 23 of the slitting fixture 20.

[0055] After the cutting is completed, the cleaning motor 361 first drives the cleaning mounting plate 365, the two cleaning connecting plates 366, the mounting rod 3681, the scraper 367 on the mounting rod 3681, and the pressure block 368 on the mounting rod 3681 to move to the right to the predetermined position via the driving wheel 362, the driven wheel 363, and the timing belt 364. Then, the cleaning motor 361 drives the cleaning mounting plate 365, the two cleaning connecting plates 366, and the scraper 367 on the mounting rod 3681 to move to the left to the initial position via the driving wheel 362, the driven wheel 363, and the timing belt 364. The friction between the hot-cut wire 331 and the two scrapers 367 corresponding to the hot-cut wire 331 can remove foreign objects such as diaphragm debris remaining on both sides of the corresponding hot-cut wire 331, thereby cleaning the hot-cut wire 331.

[0056] The slitting assembly 30 of this utility model includes a slitting mounting plate 32 and at least two slitting units. Each slitting unit includes a hot-cutting wire 331, a first slitting connecting plate 332, a second slitting connecting plate 333, a tensioning mounting plate 334, and a tensioning cylinder 335. The tensioning cylinder 335 drives the second slitting connecting plate 333 to move to the right, thereby driving the end of the hot-cutting wire 331 connected to the bottom end of the second slitting connecting plate 333 to move to the right. This allows the hot-cutting wire 331 to be tensioned, ensuring that it remains taut. This prevents uneven cuts when the separator 1 of the multi-layer battery cell is cut using the hot-cutting wire 331, thus improving the quality of the individual battery cells after slitting.

[0057] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A battery cell slitting mechanism, comprising a base, at least three slitting clamps, and a slitting assembly, wherein the slitting clamps are disposed at the top of the base, the three slitting clamps are arranged sequentially and spaced apart from front to back, and the slitting assembly includes two lifting drive units disposed at the top of the base, the two lifting drive units being arranged left and right opposite each other, and the three slitting clamps being located between the two lifting drive units, characterized in that, The slitting assembly also includes a slitting mounting plate and at least two slitting units, the two slitting units being arranged at a distance from each other, the slitting mounting plate being located above the three slitting clamps, and the two ends of the slitting mounting plate being connected to two lifting drive units respectively; The slitting unit includes a hot-cutting wire, a first slitting connecting plate, a second slitting connecting plate, a tensioning mounting plate, and a tensioning cylinder. The hot-cutting wires of the two slitting units are respectively located between two adjacent slitting fixtures. The two ends of the hot-cutting wires protrude from the two ends of the slitting fixtures and are respectively connected to the bottom ends of the first slitting connecting plate and the bottom ends of the second slitting connecting plate. The top end of the first slitting connecting plate is located at the bottom end of the slitting mounting plate. The tensioning mounting plate is located at the bottom end of the slitting mounting plate and is located behind the second slitting connecting plate. A tensioning connecting block is slidably disposed on the side of the tensioning mounting plate near the second slitting connecting plate. The top end of the second slitting connecting plate is connected to the tensioning connecting block. The tensioning cylinder is disposed on the side of the tensioning mounting plate near the second slitting connecting plate and its output end is connected to the tensioning connecting block. The tensioning cylinder is used to drive the tensioning connecting block to move left and right.

2. The cell slitting mechanism according to claim 1, characterized in that, The first slitting connecting plate has a first fixing block at its top and a second fixing block on one side of the first fixing block. The second fixing block is detachably mounted at the bottom of the slitting mounting plate. The slitting mounting plate has a first slitting slide rail corresponding to the first slitting connecting plates of the two slitting units at its bottom. The two ends of the first slitting slide rail are respectively connected to the two sides of the slitting mounting plate. The top of the first fixing block has a first slitting slider. The first slitting sliders of the two slitting units are respectively slidably engaged with the first slitting slide rail.

3. The cell slitting mechanism according to claim 2, characterized in that, The top of the tensioning mounting plate is provided with a third fixing block, and a fourth fixing block is provided on one side of the third fixing block. The fourth fixing block is detachably mounted on the bottom of the slitting mounting plate. The bottom of the slitting mounting plate is provided with a second slitting slide rail corresponding to the tensioning mounting plates of the two slitting units. The two ends of the second slitting slide rail are respectively connected to the two sides of the slitting mounting plate. The top of the third fixing block is provided with a second slitting slider. The second slitting sliders of the two slitting units are respectively slidably engaged with the second slitting slide rail.

4. The cell slitting mechanism according to claim 1, characterized in that, The base has two front and rear drive units arranged in a left-right opposite manner at its top, and two lifting drive units are respectively arranged at the top of the two front and rear drive units. The two front and rear drive units are used to drive the two lifting drive units to move back and forth.

5. The cell slitting mechanism according to claim 4, characterized in that, The lifting drive unit includes a lifting linear module. The two ends of the split mounting plate are respectively connected to the lifting linear modules of the two lifting drive units. The front and rear drive units include front and rear linear modules, which are disposed at the top of the base. The lifting linear modules of the two lifting drive units are respectively disposed at the top of the front and rear linear modules of the two front and rear drive units.

6. The cell slitting mechanism according to claim 1, characterized in that, The slitting assembly further includes a cleaning unit, which comprises a cleaning motor, a timing belt structure, a cleaning mounting plate, and two cleaning connecting plates arranged in a front-to-back configuration. The cleaning motor is located at the top of the slitting mounting plate and close to one end of the plate. The timing belt structure includes a drive pulley, a driven pulley, and a timing belt sleeved on the outer periphery of the drive pulley and the driven pulley. The drive pulley is sleeved on the outer periphery of the output end of the cleaning motor. The driven pulley is rotatably mounted at the top of the slitting mounting plate and close to the other end of the plate. The cleaning mounting plate is slidably mounted at the top of the slitting mounting plate, with both ends protruding from the sides of the plate. The cleaning mounting plate is located below the timing belt and close to the connecting plates. The step belt connection includes a slitting mounting plate located between two cleaning connecting plates. The top ends of the two cleaning connecting plates are connected to the two ends of the cleaning mounting plate, and the bottom ends of the two cleaning connecting plates are connected by a mounting rod. The mounting rod is located above two hot cutting wires. Two scrapers corresponding to the hot cutting wires are slidably sleeved on the outer periphery of the mounting rod. The scrapers can move along the mounting rod, and the hot cutting wires are located between the two corresponding scrapers. The sides of the two scrapers that are close to each other abut against the two sides of the corresponding hot cutting wires. Two pressure blocks corresponding to the two scrapers are fixedly sleeved on the outer periphery of the mounting rod. The two scrapers are located between the two corresponding pressure blocks. The two scrapers and the two corresponding pressure blocks are connected by elastic elements, which are in a compressed state.

7. The cell slitting mechanism according to claim 6, characterized in that, The scraper has a scraper through hole that extends through both sides of it. The scraper is sleeved on the outer periphery of the mounting rod through the scraper through hole. A linear bearing is provided in the scraper through hole and is sleeved on the outer periphery of the mounting rod.

8. The cell slitting mechanism according to claim 1, characterized in that, The slitting fixture includes a fixture mounting plate, a lower clamping mounting seat, a pad, an upper clamping mounting seat, a pressure plate, and two lifting cylinders arranged side-by-side. The fixture mounting plate is located at the top of the base. The lower clamping mounting seat and the two lifting cylinders are respectively located at the top of the fixture mounting plate. The lower clamping mounting seat is located between the two lifting cylinders. The pad is located at the top of the lower clamping mounting seat. The top of the pad has multiple pad clearance grooves, which are spaced apart from left to right. Extending to the lower clamping mounting base, the pressure plate is located above the pad and is positioned opposite to the pad. The pressure plate is located at the bottom end of the upper clamping mounting base. The bottom end of the pressure plate is provided with multiple pressure plate clearance grooves. The multiple pressure plate clearance grooves are arranged sequentially from left to right and extend to the upper clamping mounting base. The multiple pressure plate clearance grooves and the multiple pad clearance grooves correspond one-to-one. The output ends of two lifting cylinders are respectively connected to the two ends of the upper clamping mounting base. The two lifting cylinders are used to drive the upper clamping mounting base to move up and down.

9. The cell slitting mechanism according to claim 8, characterized in that, The slitting fixture also includes two support seats arranged opposite each other on the left and right. The two support seats are respectively located at the top of the fixture mounting plate, and two lifting cylinders are located between the two support seats. The two ends of the upper pressing mounting seat are slidably connected to the adjacent side of the two support seats respectively.

10. The cell slitting mechanism according to claim 1, characterized in that, The cell cutting mechanism also includes a front-back moving component, with the bottom end of the base disposed at the top end of the front-back moving component, which is used to drive the base to move back and forth.

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