Pole piece caching device, tab die cutting and sheeting all-in-one machine and battery pole piece sheeting method

Abstract

This invention provides an electrode buffer device, an integrated electrode tab die-cutting and sheet-making machine, and a battery electrode sheet-making method, relating to the field of battery manufacturing technology. The electrode buffer device is used to adjust the length of the electrode strip between the die-cutting device and the sheet-making device. The device includes a frame, a feeding roller, and a pulling roller. The feeding roller is rotatably mounted on the frame, and the pulling roller is movably mounted on the frame to move closer to or further away from the feeding roller. The pulling roller, when moving closer to or further away from the feeding roller, drives the electrode strip to change the length of the electrode strip between the feeding roller and the pulling roller. When it is necessary to adjust the length of the sheet electrode, by changing the length of the electrode strip between the feeding roller and the pulling roller, the length of the electrode strip between the die-cutting device and the sheet-making device can be changed, ensuring that the reference position on the electrode strip after die-cutting can still reach the preset position on the sheet-making device, thus avoiding sheet-making failure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing, in particular to an electrode sheet caching device, an electrode tab die-cutting and sheet-making integrated machine and a battery electrode sheet making method. BACKGROUND

[0002] In the battery manufacturing process, the electrode tab die-cutting device is used to form the electrode tab, and the electrode sheet with the formed electrode tab is transported to the winding station to form an electrode sheet roll. Then the electrode sheet roll is placed in the unwinding station of the laminating machine, and the unwinding station outputs the electrode sheet roll to the sheet-making device for the cutting and sheet-making process of the electrode sheet to form a sheet-shaped electrode sheet suitable for laminating.

[0003] As described above, in the prior art, the electrode tab after die-cutting needs to be wound, moved, unwound and then transported to the sheet-making device for sheet-making. The process is too many, which has a negative impact on cost, timing and equipment space. However, if the electrode sheet strip processed by the electrode tab die-cutting device is directly transported to the sheet-making device for the sheet-making process, the length of the sheet-shaped electrode sheet formed by cutting will change when the transport speed of the electrode sheet strip output by the electrode tab die-cutting device remains unchanged. In this case, at least one of the cutting positions of the sheet-shaped electrode sheet formed by cutting will not be in the preset position, which will eventually cause the sheet-making to fail. SUMMARY

[0004] The present application provides an electrode sheet caching device, an electrode tab die-cutting and sheet-making integrated machine and a battery electrode sheet making method to solve at least one of the above technical problems.

[0005] Embodiments of the present application can be implemented as follows:

[0006] Embodiments of the present application provide an electrode sheet caching device, which comprises:

[0007] a frame body;

[0008] a material conveying roller rotatably mounted on the frame body; and

[0009] a material pulling roller movably mounted on the frame body to approach or move away from the material conveying roller;

[0010] The material pulling roller is used to drive the electrode sheet strip to change the length of the electrode sheet strip between the material conveying roller and the material pulling roller when approaching or moving away from the material conveying roller.

[0011] Optionally, the pole piece caching device further comprises a slide rail and a telescopic mechanism, the slide rail is installed on the frame body, the pulling roller is slidably arranged on the slide rail, the telescopic mechanism is installed on the frame body, and the telescopic mechanism is connected with the pulling roller to drive the pulling roller to move towards or away from the feeding roller along the slide rail.

[0012] Optionally, the telescopic mechanism comprises a telescopic driving member and a sliding plate, the telescopic driving member is installed on the frame body, the telescopic driving member is connected with the sliding plate, the sliding plate is slidably connected with the slide rail, and the pulling roller is rotatably connected with the sliding plate.

[0013] Optionally, the telescopic driving member comprises a cylinder and a push rod, the cylinder is fixedly installed on the frame body, the cylinder is connected with the push rod, the push rod is fixedly connected with the sliding plate, and the cylinder is used to drive the push rod to slide along the length direction of the slide rail.

[0014] Optionally, the pole piece caching device further comprises a position sensor, the position sensor is installed on the frame body, and the position sensor is used to acquire the position of the sliding plate on the slide rail.

[0015] Optionally, the position sensor is a grating, and the position sensor is located on the side of the sliding plate away from the slide rail.

[0016] Optionally, the pole piece caching device further comprises a first adsorption mechanism, the first adsorption mechanism is installed on the frame body, and the first adsorption mechanism is used to remove dust from the pole piece located at the feeding roller.

[0017] Optionally, the pole piece caching device further comprises a feeding roller and a discharging roller, the feeding roller and the discharging roller are rotatably installed on the frame body.

[0018] The pole piece is used to sequentially pass through the feeding roller, the feeding roller, the pulling roller and the discharging roller.

[0019] Optionally, the pole piece caching device further comprises a second adsorption mechanism, the second adsorption mechanism is installed on the frame body, and the second adsorption mechanism is used to remove dust from the pole piece located at the feeding roller.

[0020] Optionally, the pole piece caching device further comprises a first arc-shaped limiting plate, the first arc-shaped limiting plate is installed on the frame body, and the first arc-shaped limiting plate and the circumferential outer wall of the feeding roller are arranged at intervals to define a first arc-shaped limiting space.

[0021] The first arc-shaped limiting plate is used for abutting against the tab in the turned-up state when the tab passes through the first arc-shaped limiting space.

[0022] Optionally, the tab buffering device further comprises a planar limiting plate, the planar limiting plate is installed on the frame body, the material conveying roller and the material pulling roller are located in the same horizontal plane, and the planar limiting plate is located on the side of the material conveying roller away from the material feeding roller.

[0023] The planar limiting plate is used for abutting against the tab in the turned-up state when the tab passes through the material conveying roller.

[0024] Optionally, the tab buffering device further comprises a second arc-shaped limiting plate, the second arc-shaped limiting plate is installed on the frame body, and the second arc-shaped limiting plate and the circumferential outer wall of the material conveying roller are arranged at intervals to define a second arc-shaped limiting space.

[0025] The second arc-shaped limiting plate is used for abutting against the tab in the turned-up state when the tab passes through the second arc-shaped limiting space.

[0026] Embodiments of the present application also provide a tab die-cutting and sheeting all-in-one machine, comprising a die-cutting device, a sheeting device, and the above-mentioned tab buffering device.

[0027] The tab material belt passes through the die-cutting device, the material conveying roller, the material pulling roller, and the sheeting device in sequence, the die-cutting device is used for die-cutting the tab material belt to form tabs on the tab material belt, and the sheeting device is used for cutting the tab material belt to form sheet-shaped tab pieces.

[0028] The material pulling roller is close to or away from the material conveying roller to change the length of the tab material belt between the die-cutting device and the sheeting device.

[0029] Optionally, the tab die-cutting and sheeting all-in-one machine further comprises a detection device, the detection device is installed on the die-cutting device, and the detection device is used for detecting the shape of the tab.

[0030] Embodiments of the present application also provide a battery tab sheeting method for making sheet-shaped tab pieces, which adopts the above-mentioned tab die-cutting and sheeting all-in-one machine, and the battery tab sheeting method comprises the following steps.

[0031] The die-cutting device is started to die-cut the tab material belt to form tabs on the tab material belt.

[0032] The sheeting device is started to cut the tab material belt to form sheet-shaped tab pieces.

[0033] In the case of needing to adjust the length of the sheet-shaped pole piece, the pulling roller is controlled to move closer to or away from the feeding roller to change the length of the pole piece tape strip between the die-cutting device and the sheeting device, wherein the length of the pole piece tape strip between the die-cutting device and the sheeting device is an integer multiple of the length of the sheet-shaped pole piece.

[0034] Optionally, the step of controlling the pulling roller to move closer to or away from the feeding roller in the case of needing to adjust the length of the sheet-shaped pole piece comprises:

[0035] In the case of needing to increase or shorten the length of the sheet-shaped pole piece, the die-cutting device is controlled to speed up the transmission speed of the pole piece tape strip, and the pulling roller is controlled to move away from the feeding roller.

[0036] Or, the die-cutting device is controlled to slow down the transmission speed of the pole piece tape strip, and the pulling roller is controlled to move closer to the feeding roller.

[0037] Optionally, the state information of the tab is obtained, wherein the state information of the tab includes qualified tabs and unqualified tabs.

[0038] According to the state information of the tab, if it is an unqualified tab, the sheeting device is controlled to speed up the transmission speed of the pole piece tape strip, and the pulling roller is controlled to move closer to the feeding roller.

[0039] Optionally, the state information of the tab is obtained.

[0040] According to the state information of the tab, the pole piece tape strip is marked.

[0041] Optionally, the state information of the tab is obtained, wherein the state information of the tab includes qualified tabs and unqualified tabs.

[0042] According to the state information of the tab, if it is an unqualified tab, the cutting action of the sheeting device is delayed.

[0043] The beneficial effects of the pole piece caching device, the tab die-cutting and sheeting all-in-one machine, and the battery pole piece sheeting method according to the embodiments of the present application include, for example:

[0044] The embodiment of the present application provides a pole piece buffer device for adjusting the length of a pole piece material tape between a die cutting device and a piece making device, the pole piece buffer device comprises a frame, a material feeding roller and a material pulling roller, the material feeding roller is rotatably installed on the frame, and the material pulling roller is movably installed on the frame and is close to or away from the material feeding roller, wherein the material pulling roller is used for driving the pole piece material tape to change the length of the pole piece material tape between the material feeding roller and the material pulling roller when the material pulling roller is close to or away from the material feeding roller, and the length of the pole piece material tape between the die cutting device and the piece making device can be changed by changing the length of the pole piece material tape between the material feeding roller and the material pulling roller when the length of the piece-shaped pole piece needs to be adjusted, so that the reference position of the pole piece material tape after the die cutting process can still reach the preset position on the piece making device, and the piece making failure is avoided.

[0045] The embodiment of the present application also provides a pole lug die cutting and piece making all-in-one machine, which comprises a die cutting device, a piece making device and the pole piece buffer device, wherein the pole piece material tape is used for sequentially passing through the die cutting device, the material feeding roller, the material pulling roller and the piece making device, the die cutting device is used for die cutting the pole piece material tape to form a pole lug on the pole piece material tape, and the piece making device is used for cutting the pole piece material tape to form a piece-shaped pole piece, and the length of the pole piece material tape between the die cutting device and the piece making device is changed when the material pulling roller is close to or away from the material feeding roller, the pole piece buffer device has all the functions of the above-mentioned pole piece buffer device, meanwhile, the winding, material moving and unwinding processes between the die cutting process and the piece making process are omitted, and the processing efficiency is improved.

[0046] The embodiment of the present application also provides a battery pole piece piece making method for making a piece-shaped pole piece, which adopts the pole lug die cutting and piece making all-in-one machine, and the battery pole piece piece making method comprises the following steps: starting the die cutting device to die cut the pole piece material tape to form a pole lug on the pole piece material tape; starting the piece making device to cut the pole piece material tape to form a piece-shaped pole piece; and when the length of the piece-shaped pole piece needs to be adjusted, the material pulling roller is controlled to be close to or away from the material feeding roller to change the length of the pole piece material tape between the die cutting device and the piece making device, wherein the length of the pole piece material tape between the die cutting device and the piece making device is an integer multiple of the length of the piece-shaped pole piece, and the battery pole piece piece making method can avoid the piece making failure when the length of the piece-shaped pole piece needs to be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0048] Figure 1 It is a plan view of the pole lug die cutting and piece making all-in-one machine provided in the embodiment of the present application.

[0049] Figure 2 This is a schematic diagram of the electrode buffer device provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the die-cutting apparatus provided in an embodiment of the present invention;

[0051] Figure 4 This is a partial enlarged view of the die-cutting apparatus provided in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of the detection device provided in an embodiment of the present invention;

[0053] Figure 6 This is a schematic diagram of the electrode strip provided in an embodiment of the present invention.

[0054] Icons: 10-Electrode die-cutting and sheet-making integrated machine; 11-Electrode sheet material strip; 20-Sheet electrode; 1000-Electrode sheet buffer device; 100-Frame; 200-Feeding roller; 300-Pull roller; 400-Slide rail; 500-Telescopic mechanism; 510-Telescopic drive component; 511-Cylinder; 512-Push rod; 520-Sliding plate; 600-Feeding roller; 700-First adsorption mechanism; 800-Second adsorption mechanism; 900-Discharge roller; 1001-First arc-shaped limiting plate; 1002-Second arc-shaped limiting plate; 1003-Planar limiting plate; 2000-Die-cutting device; 2100-Laser emitter; 2200-Waste adsorption conveyor belt; 2300-Vacuum roller; 2301-Ejection hole; 3000-Sheet-making device; 4000-Detection device; 4100-Detection sensor; 4200-Limiting plate; 4201-Detection through hole; 4300-Detection bracket; 5000-Correction device; A-Die-cutting position; B-Cutting position; C-Electrode tab recess. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0057] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0058] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0060] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0061] As mentioned in the background, in the battery manufacturing process, the tab forming of the pole piece is carried out by the tab die cutting device, the pole piece with completed tab forming is conveyed to the winding station to form a pole piece roll, and then the pole piece roll is placed in the unwinding station of the laminating machine, the unwinding station outputs the pole piece roll to the sheet making device to carry out the cutting and sheet making process of the pole piece, so as to form a sheet-shaped pole piece suitable for lamination.

[0062] That is, in the prior art, the pole piece after tab die cutting needs to be wound, moved, unwound and then conveyed to the sheet making device for sheet making, which has many processes and causes adverse effects on cost, time sequence and equipment space occupation, but if the pole piece strip processed by the tab die cutting device is directly conveyed to the sheet making device for sheet making process, at least the die cutting position in the sheet-shaped pole piece cut by the sheet-shaped pole piece will not be in the preset position, resulting in failure of the final sheet making.

[0063] Specifically, the conveying speed of the pole piece strip output by the existing tab die cutting device is constant, but when the length of the sheet-shaped pole piece cut changes, the sheet making device directly connected subsequently cannot normally output the sheet-shaped pole piece.

[0064] For example, taking a pole piece roll with a length of 1000 mm as an example, if the length of the sheet-shaped pole piece cut is 1000 mm, the sheet making device can normally output the sheet-shaped pole piece, but if the length of the sheet-shaped pole piece cut is 1001 mm, the sheet making device cannot normally output the sheet-shaped pole piece. Figure 6For example, the pole piece material belt in the present application, the hollow foil area of the pole piece material belt is formed along the pole piece width direction of the pole piece material belt, assuming that the length of the pole piece formed by cutting is 10 cm (i.e. the distance between the two cutting positions B on the pole piece is 10 cm), the middle of the die cutting position A of the die cutting device is taken as the first reference line, and the pole piece material belt is taken as the second reference line at the cutting position B of the pole piece forming device, the length of the pole piece material belt between the first reference line of the die cutting device and the second reference line of the pole piece forming device is 50 cm, i.e. the length of the pole piece material belt between the die cutting device and the pole piece forming device is 50 cm.

[0065] Therefore, the pole piece material belt can form 5 pole pieces, but when the distance between the two cutting positions B on the pole piece is adjusted to, for example, 15 cm, 20 cm, etc., the distance cannot be divided by 50 cm, at this time, at least one pole piece cutting position A in the cutting position A of the pole piece formed by cutting is not in the preset position, resulting in failure of the pole piece.

[0066] Therefore, referring to Figures 1-6 , the pole piece buffer device 1000, the tab die and piece integrated machine 10 and the battery pole piece forming method provided in the embodiments of the present application can solve this problem, which will be described in detail.

[0067] Please refer to Figure 1 and Figure 2 , the embodiments of the present application provide a tab die and piece integrated machine 10, which comprises a die cutting device 2000, a piece forming device 3000 and a pole piece buffer device 1000.

[0068] The pole piece material belt 11 is used to pass through the die cutting device 2000, the pole piece buffer device 1000 and the piece forming device 3000 in turn, the die cutting device 2000 is used to die cut the pole piece material belt 11 to form tabs on the pole piece material belt 11, and the piece forming device 3000 is used to cut the pole piece material belt 11 to form pole pieces 20 with a preset length, which is convenient for stacking.

[0069] Specifically, the die cutting device 2000 can perform a tab die cutting process on the hollow foil area of the pole piece material belt 11, and simultaneously form a tab recess C, in the present embodiment, the die cutting device 2000 is a laser die cutting device, which is used to die cut the pole piece material belt 11 to form a pole piece material belt 11 with completed tab die cutting.

[0070] Meanwhile, it should be noted that the pole piece buffer device 1000 is used to adjust the length of the pole piece material belt 11 between the die cutting device 2000 and the piece forming device 3000, so as to avoid failure of the pole piece in the case of adjusting the length of the pole piece 20.

[0071] The pole piece buffer device 1000 comprises a frame body 100, a feeding roller 200 and a pulling roller 300. The feeding roller 200 is rotatably installed on the frame body 100, and the pulling roller 300 is movably installed on the frame body 100 to be close to or away from the feeding roller 200.

[0072] The pulling roller 300 is used to drive the pole piece tape 11 to change the length of the pole piece tape 11 between the feeding roller 200 and the pulling roller 300 when the pulling roller 300 is close to or away from the feeding roller 200. When the length of the pole piece 20 needs to be adjusted, the length of the pole piece tape 11 between the feeding roller 200 and the pulling roller 300 is changed, and then the length of the pole piece tape 11 between the die cutting device 2000 and the piece making device 3000 is changed, so that the die cutting position A is still at the preset position, and the piece making failure is avoided.

[0073] For example, the length of the pole piece tape 11 between the first reference line and the second reference line is 50 cm, that is, the length of the pole piece tape 11 between the die cutting device 2000 and the piece making device 3000 is 50 cm, and the length of the pole piece 20 is 10 cm. If the length of the pole piece 20 needs to be adjusted to 15 cm, the pulling roller 300 can be controlled to be close to the feeding roller 200 to reduce the length of the pole piece tape 11 between the die cutting device 2000 and the piece making device 3000 to 30 cm, or the pulling roller 300 can be controlled to be away from the feeding roller 200 to increase the length of the pole piece tape 11 between the die cutting device 2000 and the piece making device 3000 to 60 cm, so that the length of the pole piece tape 11 between the die cutting device 2000 and the piece making device 3000 is an integer multiple of the length of the pole piece 20. Therefore, the die cutting position A in the pole piece 20 cut and formed is still at the preset position, and the piece making failure is avoided.

[0074] The lug die cutting and piece making all-in-one machine 10 further comprises a pole piece deviation correcting device 5000. The pole piece tape 11 passes through the pole piece deviation correcting device 5000 and the die cutting device 2000 in sequence. The pole piece deviation correcting device 5000 is used to detect and adjust the deviation of the pole piece tape 11 in the width direction. The pole piece deviation correcting device 5000 can refer to the pole piece deviation correcting device 5000 in the prior art, and details are not repeated here.

[0075] In the embodiment, the pulling roller 300 is slidably installed on the frame body 100. In order to facilitate the sliding of the pulling roller 300, the pole piece buffer device 1000 further comprises a sliding rail 400 and a telescopic mechanism 500. The sliding rail 400 is installed on the frame body 100, and the pulling roller 300 is slidably arranged on the sliding rail 400. The telescopic mechanism 500 is installed on the frame body 100, and the telescopic mechanism 500 and the pulling roller 300 are connected to drive the pulling roller 300 to be close to or away from the feeding roller 200 along the length direction of the sliding rail 400.

[0076] The telescopic mechanism 500 comprises a telescopic driving member 510 and a sliding plate 520. The telescopic driving member 510 is installed on the frame 100. The telescopic driving member 510 is connected with the sliding plate 520. The sliding plate 520 is slidably connected with the slide rail 400. The pulling roller 300 is rotatably connected with the sliding plate 520. The telescopic driving member 510 is used to drive the sliding plate 520 to slide along the length direction of the slide rail 400. The rotation axis direction of the pulling roller 300 is perpendicular to the sliding direction of the pulling roller 300 on the slide rail 400.

[0077] In the embodiment, the telescopic driving member 510 comprises a cylinder 511 and a push rod 512. The cylinder 511 is fixedly installed on the frame 100. The cylinder 511 is connected with the push rod 512. The push rod 512 is fixedly connected with the sliding plate 520. The cylinder 511 is used to drive the push rod 512 to slide along the direction of the slide rail 400. Of course, in other embodiments, a motor driven screw mechanism can be used to drive the pulling roller 300 to move on the slide rail 400.

[0078] Of course, in other embodiments, the pulling roller 300 can also be driven to move close to or away from the conveying roller 200 by a swing arm installed on the frame 100.

[0079] In order to ensure the accuracy of the movement of the pulling roller 300, the pole piece buffer device 1000 further comprises a position sensor, which is preferably an optical grating (not shown in the figure). The position sensor is installed on the frame 100 and located on the side of the sliding plate 520 away from the slide rail 400. The position sensor is used to obtain the position of the sliding plate 520 on the slide rail 400.

[0080] Of course, in the embodiment, in order to remove dust from the pole piece tape 11, the pole piece buffer device 1000 further comprises a first adsorption mechanism 700, a feeding roller 600, a discharging roller 900 and a second adsorption mechanism 800. The first adsorption mechanism 700 is installed on the frame 100 and used to remove dust from the pole piece tape 11 located at the conveying roller 200. The feeding roller 600 and the discharging roller 900 are rotatably installed on the frame 100. The feeding roller 600 is located above the conveying roller 200. The discharging roller 900 is located above the pulling roller 300. The second adsorption mechanism 800 is installed on the frame 100 and used to remove dust from the pole piece tape 11 located at the feeding roller 600. The pole piece tape 11 is used to pass through the feeding roller 600, the conveying roller 200, the pulling roller 300 and the discharging roller 900 in sequence.

[0081] In addition, since the tab is prone to deformation and is in a turned-up state during the process of curling or uncurling of the tab sheet, the tab sheet buffer device 1000 further comprises a first arc-shaped limiting plate 1001, a second arc-shaped limiting plate 1002 and a planar limiting plate 1003. The first arc-shaped limiting plate 1001 is installed on the frame body 100, and the first arc-shaped limiting plate 1001 and the circumferential outer wall of the feeding roller 600 are arranged at intervals to define a first arc-shaped limiting space. In the case where the tab passes through the first arc-shaped limiting space, the first arc-shaped limiting plate 1001 is used to abut against the tab in the turned-up state.

[0082] The second arc-shaped limiting plate 1002 is installed on the frame body 100, and the second arc-shaped limiting plate 1002 and the circumferential outer wall of the feeding roller 200 are arranged at intervals to define a second arc-shaped limiting space. In the case where the tab passes through the second arc-shaped limiting space, the second arc-shaped limiting plate 1002 is used to abut against the tab in the turned-up state.

[0083] The planar limiting plate 1003 is installed on the frame body 100, and the feeding roller 200 and the pulling roller 300 are located in the same horizontal plane. The planar limiting plate 1003 is located on the side of the feeding roller 200 away from the feeding roller 600, i.e., the planar limiting plate 1003 is located on the lower side of the tab sheet strip 11. In this way, the planar limiting plate 1003 is used to abut against the tab passing through the feeding roller 200 and in the turned-up state.

[0084] Please continue to refer to Figure 4 and Figure 5 In order to be able to timely find the tab that does not meet the requirements of the shape, and to timely remove and scrap the tab sheet 20 with the tab that does not meet the requirements of the shape, the tab die-cutting and sheet-making all-in-one machine 10 further comprises a detection device 4000. The detection device 4000 is installed on the die-cutting device 2000, and is used to detect the shape of the tab.

[0085] Here, the shape of the tab can be understood as a qualified shape and an unqualified shape. For example, the length of the tab recess C of the tab formed by the die-cutting device 2000 does not meet the pre-set length of the tab recess C. In this case, the tab of the tab sheet 20 is in an unqualified shape, or part of the tab is damaged. In this case, the tab of the tab sheet 20 is also in an unqualified shape.

[0086] Please continue to refer to Figure 4 and Figure 5 Specifically, the detection device 4000 comprises a detection bracket 4300, a detection sensor 4100 and two limiting plates 4200. The detection sensor 4100 and the two limiting plates 4200 are both installed on the detection bracket 4300, and the detection bracket 4300 can be installed on the die-cutting device 2000.

[0087] The detection sensor 4100 can be a photoelectric sensor or an image sensor, the detection sensor 4100 and the two limiting plates 4200 are installed on the die cutting device 2000, the two limiting plates 4200 are arranged at intervals to define a pole piece limiting space, the limiting plate 4200 is provided with a detection hole 4201, and the detection hole 4201 is used to expose the tab to facilitate detection of the tab by the detection sensor 4100.

[0088] Specifically, the tab passes through the pole piece limiting space, and the detection sensor 4100 is used to detect the state of the tab through the detection hole 4201.

[0089] Of course, in order to facilitate the identification of the sheet-shaped pole piece 20 with unqualified tabs, the tab die cutting and sheeting all-in-one machine 10 further comprises a marking mechanism, which can be electrically connected with the detection sensor 4100, and the marking mechanism can also be installed on the detection bracket 4300. The marking mechanism is used to mark the pole piece material belt 11 according to the state information of the tab obtained by the detection device 4000.

[0090] Specifically, when the detection sensor 4100 detects that the shape of the tab of the sheet-shaped pole piece 20 is unqualified, the information is fed back to the marking mechanism, and the marking mechanism can include a laser unit to mark the unqualified tab. Of course, in other embodiments, the marking mechanism can also include a color spraying unit for color marking of the tab with unqualified shape, so as to facilitate subsequent rejection of the sheet-shaped pole piece 20 with the tab with unqualified shape.

[0091] Please refer to Figure 3 and Figure 4 In this embodiment, the die cutting device 2000 comprises a die cutting frame body 100, a laser emitter 2100, a waste suction conveying belt 2200, and a vacuum roller 2300. The laser emitter 2100 and the waste suction conveying belt 2200 are installed on the die cutting frame body 100, and the vacuum roller 2300 is rotatably installed on the die cutting frame body 100. A plurality of suction holes 2301 are arranged on the vacuum roller 2300 close to the tab.

[0092] The laser emitter 2100 is used for tab die cutting of the pole piece material belt, and the waste suction conveying belt 2200 is used for suction of the waste generated by cutting. The waste suction conveying belt 2200 and the vacuum roller 2300 are located on both sides of the pole piece material belt 11.

[0093] Due to the light weight and softness of the tab, the tab corner is prone to sagging and folding during the curling of the pole piece strip 11. In addition, the deformation of the tab is aggravated during the adsorption of the waste material by the waste material adsorption conveyor belt 2200. The folded tab is not easy to restore to its original state in a natural state, which affects the normal processing of the subsequent sheet-shaped pole piece 20.

[0094] The tab can be adsorbed through the air suction hole 2301 on the vacuum roller 2300 to avoid deformation of the tab corner during the curling of the pole piece. In addition, the tab can also be prevented from being deformed by the adsorption force of the waste material conveyor belt.

[0095] Please refer to Figure 1 and Figure 6 Based on the above-mentioned tab die-cutting and sheet-making machine 10, the embodiments of the present application also provide a battery pole piece sheet-making method for making sheet-shaped pole pieces 20. The battery pole piece sheet-making method comprises:

[0096] Starting the die-cutting device 2000 to die-cut the pole piece strip 11 to form tabs on the pole piece strip 11, and starting the sheet-making device 3000 to cut the pole piece strip 11 to form sheet-shaped pole pieces 20;

[0097] In the case of needing to adjust the length of the sheet-shaped pole piece 20, the pulling roller 300 is controlled to approach or move away from the material conveying roller 200 to change the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000, wherein the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000 is an integer multiple of the length of the sheet-shaped pole piece 20.

[0098] It should be noted that the length of the sheet-shaped pole piece 20 here can be understood as the distance between the center lines of adjacent cutting positions B.

[0099] For example, in the case of needing to increase the length of the sheet-shaped pole piece 20, for example, the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000 is 50 cm, and the length of the sheet-shaped pole piece 20 is 10 cm. If the length of the sheet-shaped pole piece 20 needs to be adjusted to 15 cm, the die-cutting device 2000 can be controlled to slow down the transmission speed of the pole piece strip 11, the pulling roller 300 can be controlled to approach the material conveying roller 200, and the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000 can be reduced to 30 cm to ensure that the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000 is an integer multiple of the length of the sheet-shaped pole piece 20. At this time, the length of the pole piece strip 11 between the die-cutting device 2000 and the sheet-making device 3000 can make two sheet-shaped pole pieces 20 with a length of 15 cm.

[0100] Alternatively, the transmission speed of the polar piece tape 11 by the cutting device 2000 can be accelerated, the pulling roller 300 is controlled to move away from the feeding roller 200, and the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is increased to 60 cm, so that the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is an integer multiple of the length of the sheet polar piece 20, and four sheet polar pieces 20 with a length of 15 cm can be formed.

[0101] Therefore, the cutting position A in the sheet polar piece 20 formed by cutting can still be at the preset position, and the failure of the piece forming can be avoided.

[0102] For example, in the case where the length of the sheet polar piece 20 needs to be shortened, for example, the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is 60 cm, and the length of the sheet polar piece 20 is 10 cm, if the length of the sheet polar piece 20 needs to be adjusted to 7 cm, the transmission speed of the polar piece tape 11 by the cutting device 2000 can be accelerated, and the pulling roller 300 is controlled to move away from the feeding roller 200, and the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is increased to 70 cm, so that the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is an integer multiple of the length of the sheet polar piece 20, and ten sheet polar pieces 20 with a length of 7 cm can be formed.

[0103] Alternatively, the transmission speed of the polar piece tape 11 by the cutting device 2000 can be accelerated, the pulling roller 300 is controlled to move away from the feeding roller 200, and the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is increased to 60 cm, so that the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 is an integer multiple of the length of the sheet polar piece 20, and four sheet polar pieces 20 with a length of 15 cm can be formed.

[0104] It should be noted that during the acceleration or deceleration of the transmission speed of the polar piece tape 11 by the cutting device 2000, the transmission speed of the polar piece tape 11 by the piece forming device 3000 can not be changed.

[0105] After the transmission speed of the polar piece tape 11 by the cutting device 2000 is accelerated or decelerated, until the length of the polar piece tape 11 between the cutting device 2000 and the piece forming device 3000 meets the integer multiple of the length of the sheet polar piece 20, the initial transmission speed of the polar piece tape 11 by the cutting device 2000 is restored.

[0106] In addition, the battery pole piece manufacturing method further comprises: obtaining state information of the tabs, wherein the state information of the tabs comprises qualified tabs and unqualified tabs. Here, the qualified tab can be understood as a qualified form of the tab, and the unqualified tab can be understood as an unqualified form of the tab.

[0107] According to the state information of the tabs, it is determined whether the tabs are qualified. If the tabs are unqualified, the manufacturing device 3000 is controlled to speed up the transmission speed of the pole piece material belt 11, and the pulling roller 300 is controlled to move closer to the material conveying roller 200.

[0108] Specifically, the state information of the tabs is obtained by the detection sensor 4100. Here, the state information of the tabs can be understood as qualified tabs and unqualified tabs. For example, the tabs formed by the die-cutting process of the die-cutting device 2000 have a length dimension of the tab recess C in the length direction of the pole piece material belt 11 that does not meet the preset length dimension of the tab recess C. At this time, the tab form of the sheet-shaped pole piece 20 is unqualified.

[0109] Here, it needs to be explained that, for example, when the die-cutting device cuts the tab recess C, the length of time of the die-cutting process exceeds the set laser cutting time. For example, the normal length of the tab recess C is 1 cm, and the laser cutting time is 1 s. Due to program deviation or other reasons, the laser cutting time is lengthened, for example, to 1.5 s. As a result, the length of the cut tab recess C is 1.5 cm, which is longer than other tab recesses C, i.e., unqualified tabs occur. However, the cutting interval time between adjacent tab recesses C does not change, which causes the positions of the subsequent tab recesses C to be offset, i.e., the starting cutting time of the subsequent tab recess C is delayed by 0.5 s from the preset starting time, the ending cutting time is also delayed by 0.5 s from the preset ending time, and the position of the tab recess is offset by 0.5 cm backward along the travel path compared with the preset position of the tab recess.

[0110] Since the cutting time of the cutting device does not change due to the change of the cutting time of the die-cutting station, the pole piece material belt cannot be cut at the correct cutting position, for example, the cutting position is 0.5 cm before the middle position of the tab recess C, which affects the manufacturing of the subsequent manufacturing device.

[0111] Therefore, if the information acquired by the detection sensor 4100 is a qualified tab, the current production state of the sheet-shaped tab is maintained, but if the information acquired by the detection sensor 4100 is an unqualified tab, the information is fed back to the tabbing device 3000, and when the tabbing device 3000 is about to enter the cutting station of the tabbing device 3000, the tabbing device 3000 speeds up the transmission speed of the tabbing device 3000, and at the same time, the pulling roller 300 is controlled to approach the feeding roller 200, so as to reduce the length of the tabbing device 2000 and the tabbing device 3000 between the tabbing device 2000 and the tabbing device 3000. The length of the tabbing device 11 is an integer multiple of the length of the sheet-shaped tab 20, and the tabbing device 3000 can cut at the next die cutting position A.

[0112] For example, the length of the tabbing device 11 between the die cutting device 2000 and the tabbing device 3000 is 50 cm, and the length of the sheet-shaped tab 20 is 10 cm. After the tabbing device 3000 speeds up the transmission speed of the tabbing device 11 and controls the pulling roller 300 to approach the feeding roller 200, the length of the tabbing device 11 between the die cutting device 2000 and the tabbing device 3000 can be 40 cm, which ensures that the tabbing device 3000 can still cut at the middle position of the tab ear recess C, and the length of the tabbing device 11 between the die cutting device 2000 and the tabbing device 3000 still maintains an integer multiple of the length of the sheet-shaped tab 20, without affecting the subsequent tabbing process. It should be noted that during this process, the transmission speed of the tabbing device 2000 to the tabbing device 11 can not change, and at the same time, the cutting frequency of the tabbing device 3000 to the tabbing device 11 also does not need to change.

[0113] Of course, in other embodiments, in the case of damage to one or more tab ears, only the sheet-shaped tab at the damaged tab ear is unqualified, but it does not affect the subsequent die cutting position of the tab, so the tabbing device 3000 does not need to be controlled to speed up the transmission speed of the tabbing device 11 and the pulling roller 300 to approach the feeding roller 200. The corresponding damaged sheet-shaped tab can be screened and removed in the subsequent process.

[0114] In addition, the cutting action of the tabbing device 3000 can also be delayed when the length of the tab ear recess C in the length direction of the tabbing device 11 does not meet the preset length of the tab ear recess C, to ensure that the subsequent tab ear recess C can still be at the preset tab ear recess position.

[0115] Specifically, when it is detected that the length of the cut tab recess C is longer than that of the normal other tab recess C, information can be fed back to the tabletting device, and when the tab sheet material strip 11 with the unqualified tab is about to enter the cutting station of the tabletting device 3000, the execution time of the cutting action of the tabletting device 3000 is delayed until the middle position of the next tab recess C is in the cutting station of the tabletting device 3000, and then cutting is performed. At this time, it is ensured that the tabletting device 3000 can still cut at the middle position of the tab recess C, and the length of the tab sheet material strip 11 between the die-cutting device 2000 and the tabletting device 3000 still remains an integer multiple of the length of the sheet tab 20, which does not affect the subsequent tabletting process.

[0116] In addition, the battery tab tabletting method further comprises: obtaining state information of the tab, and marking the tab sheet material strip 11 according to the state information of the tab.

[0117] Specifically, in order to facilitate the identification of the sheet tab 20 with the unqualified tab, the marking mechanism marks the tab sheet material strip 11 according to the state information of the tab obtained by the detection device 4000.

[0118] In which, when the detection sensor 4100 detects that the tab of the sheet tab 20 is in an unqualified state, the information is fed back to the marking mechanism, and the marking mechanism can include a laser unit to mark the unqualified tab, so as to facilitate subsequent screening and rejection of the sheet tab 20 with the unqualified tab in the sheet tab 20.

[0119] In summary, the tab buffering device 1000 is used to adjust the length of the tab sheet material strip 11 between the die-cutting device 2000 and the tabletting device 3000, and the tab buffering device 1000 comprises a frame body 100, a material conveying roller 200 and a material pulling roller 300. The material conveying roller 200 is rotatably mounted on the frame body 100, and the material pulling roller 300 is movably mounted on the frame body 100 to approach or move away from the material conveying roller 200. The material pulling roller 300 is used to drive the tab sheet material strip 11 to change the length of the tab sheet material strip 11 between the material conveying roller 200 and the material pulling roller 300 when the material pulling roller 300 approaches or moves away from the material conveying roller 200. When it is necessary to adjust the length of the sheet tab 20, the length of the tab sheet material strip 11 between the material conveying roller 200 and the material pulling roller 300 is changed, and then the length of the tab sheet material strip 11 between the die-cutting device 2000 and the tabletting device 3000 is changed, so as to ensure that the reference position of the tab sheet material strip after die-cutting can still reach the preset position on the tabletting device, and avoid tabletting failure.

[0120] The tab die cutting and sheeting integrated machine 10 comprises a die cutting device 2000, a sheeting device 3000 and the above-mentioned tab sheet buffer device 1000, wherein the tab sheet material belt is used to pass through the die cutting device 2000, the material conveying roller 200, the material pulling roller 300 and the sheeting device 3000 in sequence, the die cutting device 2000 is used to cut the tab sheet material belt 11 to form tabs on the tab sheet material belt 11, and the sheeting device 3000 is used to cut the tab sheet material belt 11 to form sheet tab 20, and in the case that the material pulling roller 300 approaches or moves away from the material conveying roller 200, the length of the tab sheet material belt 11 between the die cutting device 2000 and the sheeting device 3000 is changed, the above-mentioned tab sheet buffer device 1000 has all the functions, and meanwhile, the winding, material moving and unwinding processes between the die cutting process and the sheeting process are omitted, and the processing efficiency is improved.

[0121] The battery tab sheeting method is used to make sheet tab 20, and the above-mentioned tab die cutting and sheeting integrated machine 10 is adopted, the battery tab sheeting method comprises the following steps: starting the die cutting device 2000 to cut the tab sheet material belt 11 to form tabs on the tab sheet material belt 11; starting the sheeting device 3000 to cut the tab sheet material belt 11 to form sheet tab 20; and in the case that the length of the sheet tab 20 needs to be adjusted, controlling the material pulling roller 300 to approach or move away from the material conveying roller 200 to change the length of the tab sheet material belt 11 between the die cutting device 2000 and the sheeting device 3000, so that the battery tab sheeting method can avoid sheeting failure when the length of the sheet tab 20 needs to be adjusted.

[0122] The above-mentioned is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any change or replacement that can be easily thought of by those skilled in the art within the technical range disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pole piece cache apparatus, characterized by, The application relates to a pole piece buffer device for adjusting the length of a pole piece tape (11) between a die cutting device (2000) and a piece making device (3000), the pole piece buffer device comprising: a frame body (100); a feeding roller (200) rotatably mounted on the frame body (100); and a pulling roller (300) movably mounted on the frame body (100) to be close to or away from the feeding roller (200); wherein the pulling roller (300) is used to drive the pole piece tape (11) to change the length of the pole piece tape (11) between the feeding roller (200) and the pulling roller (300) when the pulling roller (300) is close to or away from the feeding roller (200), so that the length of the pole piece tape (11) between the die cutting device (2000) and the piece making device (3000) is an integer multiple of the length of a piece-shaped pole piece.

2. The pole piece cache device of claim 1, wherein, The pole piece buffer device further comprises: a slide rail (400) mounted on the frame body (100), and the pulling roller (300) is slidably arranged on the slide rail (400); a telescopic mechanism (500) mounted on the frame body (100), and the telescopic mechanism (500) is connected with the pulling roller (300) to drive the pulling roller (300) to be close to or away from the feeding roller (200) along the slide rail (400).

3. The pole piece cache device of claim 2, wherein, The telescopic mechanism (500) comprises a telescopic driving member (510) and a sliding plate (520), the telescopic driving member (510) is mounted on the frame body (100), the telescopic driving member (510) is connected with the sliding plate (520), the sliding plate (520) is slidably connected with the slide rail (400), the pulling roller (300) is rotatably connected with the sliding plate (520), and the telescopic driving member (510) is used to drive the sliding plate (520) to slide along the length direction of the slide rail (400).

4. The pole piece cache of claim 1, wherein, The pole piece buffer device further comprises an inlet roller (600) and an outlet roller, and the inlet roller (600) and the outlet roller are rotatably mounted on the frame body (100); wherein the pole piece tape (11) is used to pass through the inlet roller (600), the feeding roller (200), the pulling roller (300) and the outlet roller in sequence.

5. A tab die cutting and sheeting all-in-one machine, characterized in that, The pole piece buffer device comprises a die cutting device (2000), a piece making device (3000) and the pole piece buffer device according to any one of claims 1-4; wherein the pole piece tape (11) is used to pass through the die cutting device (2000), the feeding roller (200), the pulling roller (300) and the piece making device (3000) in sequence, the die cutting device (2000) is used to cut the pole piece tape (11) to form a pole lug on the pole piece tape (11), and the piece making device (3000) is used to cut the pole piece tape (11) to form a piece-shaped pole piece. In the case that the pulling roller (300) approaches or moves away from the feeding roller (200), the length of the pole piece tape (11) between the die-cutting device (2000) and the piece-making device (3000) is changed, so that the length of the pole piece tape (11) between the die-cutting device (2000) and the piece-making device (3000) is an integer multiple of the length of the piece-shaped pole piece.

6. The tab die cutting and slitting all-in-one machine according to claim 5, characterized in that, The tab die-cutting and piece-making all-in-one machine further comprises a detection device (4000) installed on the die-cutting device (2000), which is used to detect the shape of the tab.

7. A battery electrode sheet manufacturing method for manufacturing a sheet-shaped electrode sheet, characterized by, The tab die-cutting and piece-making all-in-one machine of claim 5 or 6, the battery pole piece piece-making method comprises: starting the die-cutting device (2000) to die-cut the pole piece tape (11) to form tabs on the pole piece tape (11); starting the piece-making device (3000) to cut the pole piece tape (11) to form a piece-shaped pole piece; In the case that the length of the piece-shaped pole piece needs to be adjusted, the pulling roller (300) is controlled to approach or move away from the feeding roller (200) to change the length of the pole piece tape (11) between the die-cutting device (2000) and the piece-making device (3000); wherein the length of the pole piece tape (11) between the die-cutting device (2000) and the piece-making device (3000) is an integer multiple of the length of the piece-shaped pole piece.

8. The battery pole sheeting method of claim 7, wherein, The step of controlling the pulling roller (300) to approach or move away from the feeding roller (200) in the case that the length of the piece-shaped pole piece needs to be adjusted comprises: In the case that the length of the piece-shaped pole piece needs to be increased or shortened, the die-cutting device (2000) is controlled to speed up the transmission speed of the pole piece tape (11), and the pulling roller (300) is controlled to move away from the feeding roller (200); or, the die-cutting device (2000) is controlled to slow down the transmission speed of the pole piece tape (11), and the pulling roller (300) is controlled to approach the feeding roller (200).

9. The battery pole sheeting method of claim 7, wherein, The battery pole piece piece-making method further comprises: obtaining state information of the tab, wherein the state information of the tab includes qualified tabs and unqualified tabs; According to the state information of the tab, if it is an unqualified tab, the piece-making device (3000) is controlled to speed up the transmission speed of the pole piece tape (11), and the pulling roller (300) is controlled to approach the feeding roller (200) to reduce the integer multiple of the length of the pole piece tape (11) between the die-cutting device (2000) and the piece-making device (3000) to the length of the piece-shaped pole piece.

10. The battery pole sheet manufacturing method of claim 7, wherein, The battery pole piece piece-making method further comprises: obtaining state information of the tab, wherein the state information of the tab includes qualified tabs and unqualified tabs; According to the state information of the tab, if it is an unqualified tab, the cutting action of the piece-making device (3000) is delayed.

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