Slitting roller press and slitting rolling line thereof

Abstract

The slitting roller press comprises a first slitting machine, a separating device and a roller press which are sequentially arranged in the conveying direction of a pole piece, the first slitting machine at least comprises a first slitting machine body, and a second slitting machine body is arranged on the first slitting machine body. The first splitting machine is used for splitting the pole piece into at least a first pole piece group and a second pole piece group along a blank area of the pole piece, the roller press at least comprises a first roller, a second roller and a driving assembly used for driving the first roller and the second roller, and the roller press is used for rolling the split first pole piece group and the second pole piece group. The feeding device has the advantages that the structure is simpler, the design is more ingenious, and the material belt can be effectively prevented from being wrinkled.

Description

Technical Field

[0001] The utility model relates to the field of slitting and rolling devices for battery pole pieces, in particular to a slitting and rolling machine and a slitting and rolling line thereof. Background Art

[0002] In the prior art, there is a rolling process in the processing technology of lithium battery pole pieces, which is to roll the dried electrode active material on the substrate through a roller press to make the electrode active material on the substrate reach a thickness and density that meets certain requirements; then, the whole lithium battery pole piece is cut into multiple narrower lithium battery pole pieces by a slitting mechanism.

[0003] For a whole-width lithium battery pole piece coated with multiple (at least two or more) mutually spaced electrode active materials along the length direction of the substrate, during rolling, in addition to applying downward pressure to compact the electrode active material, the roller press also applies a forward pulling force to the lithium battery pole piece, which is generated by the friction between the rolling roller and the surface of the lithium battery pole piece. In actual production, the roller press also applies a pulling force in the width direction of the lithium battery pole piece, which is generated by rolling the electrode active material. Ideally, the pulling force applied by the roller press to the lithium battery pole piece in the width direction should be uniform and equal; however, in the actual rolling process, the pulling force of the roller press on the two adjacent areas coated with electrode active materials is not completely consistent, which causes the blank substrate located between the two areas coated with electrode active materials to wrinkle.

[0004] In addition, in the prior art, since the elongation rate of the area coated with the electrode active material and the blank area without the electrode active material on the entire lithium battery pole piece is different after being compressed, the substrate in the blank area will also be wrinkled. This problem has always plagued the manufacturing of lithium battery pole pieces.

[0005] Furthermore, during the rolling process of the entire lithium battery pole piece, uneven pressure and unevenness caused by wrinkles in the substrate will further lead to the appearance of flow lines in the electrode active material area after rolling.

[0006] In order to solve the above problems, Chinese patent document CN 112872825 A discloses a rolling and slitting integrated machine, including an unwinding mechanism, a rolling mechanism, a slitting mechanism, a first adjusting component and a second adjusting component, wherein the rolling mechanism is arranged on one side of the unwinding mechanism, and the rolling mechanism is used to roll the material strip; the slitting mechanism is used to slit the material strip into a first strip and a second strip; the first adjusting component is used to stabilize the tension fluctuation of the material strip between the unwinding mechanism and the rolling mechanism; and the second adjusting component is used to stabilize the tension fluctuation of the material strip between the rolling mechanism and the slitting mechanism.

[0007] The above-mentioned roller pressing and slitting machine in the prior art stabilizes the tension fluctuation during the material belt conveying process before and after the roller pressing process by setting a first adjustment component and a second adjustment component, thereby avoiding the problem of wrinkling of the material belt; although the roller pressing and slitting machine can effectively reduce the wrinkling problem of the blank substrate, this roller pressing machine cannot completely eliminate the wrinkling phenomenon. Therefore, this roller pressing still has room for improvement to further reduce or eliminate the wrinkling phenomenon of the blank substrate. Utility Model Content

[0008] In order to solve the above problems existing in the prior art, the utility model provides a slitting roller press which has a simpler structure, a more ingenious design and can effectively avoid wrinkling of the material strip.

[0009] The utility model also provides the society with a slitting roller pressing line and a slitting roller pressing method which have a simpler structure, a more ingenious design and can effectively avoid wrinkling of the material strip.

[0010] The technical solution of the utility model is: to provide a slitting and rolling machine, comprising a first slitting machine, a separating device and a rolling machine which are sequentially arranged along the conveying direction of the electrode sheet, wherein the first slitting machine at least comprises a first slitting machine body, and the first slitting machine is used to slit the electrode sheet into at least a first electrode sheet group and a second electrode sheet group along the blank area of ​​the electrode sheet, and the rolling machine at least comprises a first roller, a second roller, and a driving assembly for driving the first roller and the second roller, and the rolling machine is used to roll the first electrode sheet group and the second electrode sheet group after slitting.

[0011] As a further improvement of the present invention, the separation device includes a separation frame, two correcting and separating implementation mechanisms arranged on the separation frame along the conveying direction of the pole piece, at least two first rollers, and a first closing roller, a first floating roller assembly is provided in front of the correcting and separating implementation mechanism, each of the correcting and separating implementation mechanisms and at least one first roller forms a correcting line, the first pole piece group includes a number of independent unit pole pieces, the second pole piece group includes a number of independent unit pole pieces, the first pole piece group and the second pole piece group move on two lines respectively and merge on the first closing roller.

[0012] As a further improvement of the present utility model, the correcting separation implementation mechanism includes a correcting separation mounting plate, a first correcting actuator located on the correcting separation mounting plate and having a number equal to the unit pole pieces of the first pole piece group or the second pole piece group, a first correcting sensor having a number equal to and one-to-one correspondence with the first correcting actuator, and a first position adjustment mechanism for adjusting the position of the first correcting sensor, the first correcting sensor being used to sense the position of the unit pole piece, and the first correcting actuator being used to correct the unit pole piece.

[0013] As a further improvement of the present invention, the first correcting actuator includes a first correcting actuator seat, a first motor, a first connecting rod, a first hinge, a first mounting plate, and a pair of first correcting rollers located in the first correcting actuator seat, the first motor is connected to the first connecting rod and can drive the first connecting rod to move, the first mounting plate is installed on the first connecting rod, the first hinge is installed under the first mounting plate and is used to constrain the first mounting plate, and a pair of first correcting rollers are installed on the first mounting plate.

[0014] As a further improvement of the utility model, it also includes a first swing roller assembly, and the first swing roller assembly is arranged behind the first closing roller.

[0015] As a further improvement of the utility model, it also includes a first tension component, and the first tension component is arranged behind the first swing roller component.

[0016] As a further improvement of the utility model, the first slitting machine includes a first slitting frame, a first slitting traction mechanism, a first slitting knife frame and two first knife-out adjusting rollers arranged on the first slitting frame along the conveying direction of the pole piece, the pole piece is cut into a first pole piece group and a second pole piece group by the first slitting knife frame, and the first pole piece group and the second pole piece group are output respectively through the two first knife-out adjusting rollers.

[0017] Another technical solution of the utility model is: to provide a slitting roller pressing line, including a unwinding device, a slitting roller pressing machine, at least two second deviation correction devices, a second slitting machine, and a winding device arranged in sequence along the conveying direction of the battery electrode sheet, and the slitting roller pressing machine is the above-mentioned slitting roller pressing machine.

[0018] As a further improvement of the present invention, the second deflection correction device includes a second deflection correction frame, two deflection correction and guiding implementation mechanisms arranged along the conveying direction of the pole piece on the second deflection correction frame, at least two second rollers, and a second closing roller. A second floating roller assembly is provided in front of the deflection correction and guiding implementation mechanism. Each of the deflection correction and guiding implementation mechanisms and at least one second passing roller forms a deflection correction line. The first pole piece group includes a number of independent unit pole pieces, and the second pole piece group includes a number of independent unit pole pieces. The first pole piece group and the second pole piece group move on two lines respectively and merge on the second closing roller.

[0019] As a further improvement of the present invention, the correction and guiding implementation mechanism includes a correction and guiding mounting plate, a second correction actuator located on the correction and guiding mounting plate and having a number equal to the unit pole pieces of the first pole piece group or the second pole piece group, a second correction sensor having a number equal to and one-to-one correspondence with the second correction actuator, and a second position adjustment mechanism for adjusting the position of the second correction sensor, the second correction sensor being used to sense the position of the unit pole piece, and the second correction actuator being used to correct the unit pole piece.

[0020] As a further improvement of the present invention, the second correcting actuator includes a second correcting actuator seat, a second motor, a second connecting rod, a second hinge, a second mounting plate, and a pair of second correcting rollers located in the second correcting actuator seat, the second motor is connected to the second connecting rod and can drive the second connecting rod to move, the second mounting plate is installed on the second connecting rod, the second hinge is installed under the second mounting plate and is used to constrain the second mounting plate, and a pair of second correcting rollers are installed on the second mounting plate.

[0021] As a further improvement of the utility model, it also includes a third closing roller, and the third closing roller is arranged between the second floating roller assembly and the deviation correction and guiding implementation mechanism.

[0022] As a further improvement of the utility model, it also includes a second swing roller assembly, and the second swing roller assembly is arranged between the third closing roller and the second floating roller assembly.

[0023] As a further improvement of the utility model, it also includes a second tension assembly, and the second tension assembly is arranged between the second floating roller assembly and the second swing roller assembly.

[0024] As a further improvement of the present invention, the second slitting machine has the same structure as the first slitting machine.

[0025] As a further improvement of the present invention, the winding device includes at least two winding rollers and clamping devices corresponding to the number of winding rollers, and each of the clamping devices is located directly above the winding roller and is arranged corresponding to the winding roller.

[0026] The utility model overcomes the technical prejudice that the traditional lithium battery pole piece can only be rolled and then cut, and adopts a cutting and rolling method, which includes the following steps:

[0027] (S1), first cutting: at least two coating areas are provided on the electrode sheet along the length direction of the electrode sheet, and a blank area is provided between two adjacent coating areas. The electrode sheet is cut into a first electrode sheet group and a second electrode sheet group along the blank area by a first cutting machine. The first electrode sheet group and the second electrode sheet group each have at least one coating area. The first electrode sheet group includes a plurality of independent unit electrode sheets, and the second electrode sheet group includes a plurality of independent unit electrode sheets.

[0028] (S2), separation: the deviation correction and separation implementation mechanism of the separation device further separates the first pole piece group and the second pole piece group laterally until the first pole piece group is separated into independent unit pole pieces and the second pole piece group is separated into independent unit pole pieces, and a plurality of unit pole pieces pass through a first closing roller;

[0029] (S3) Rolling: A roller press is used to roll the plurality of unit pole pieces formed after the pole pieces are separated.

[0030] As a further improvement of the present invention, it also includes an unwinding step before the (S1) slitting step, wherein the pole piece is wound on an unwinding roller, and an unwinding power device drives the unwinding roller to unwind.

[0031] As a further improvement of the present invention, it further includes a thickness measuring step after the rolling step (S3) for monitoring the thickness of the unit pole piece after the rolling step.

[0032] As a further improvement of the utility model, it also includes a deviation correction step after the thickness measuring step, in which a second deviation correction device corrects the lateral position of a plurality of unit pole pieces after rolling.

[0033] As a further improvement of the utility model, it also includes a second slitting step after the deviation correction step, in which the second slitting machine divides the area coated with the electrode material in the plurality of unit electrode sheets into two along the middle position along the length direction of the electrode.

[0034] As a further improvement of the utility model, it also includes a winding step after the second slitting step, and the winding roller winds up all the unit pole pieces after slitting.

[0035] In addition, a first slitting machine, a separating device and a roller press are sequentially arranged along the transmission direction of the pole piece, wherein the first slitting machine at least includes a first slitting machine body, and the first slitting machine is used to slit the pole piece into a first pole piece group and a second pole piece group, and the roller press at least includes a first roller, a second roller, and a driving assembly for driving the first roller and the second roller, and the roller press is used to roll the first pole piece group and the second pole piece group after slitting. In the utility model, the first slitting machine first slits the pole piece into a corresponding number of first pole piece groups (with at least one unit pole piece) and second pole piece groups (with at least one unit pole piece), and the slit unit pole pieces enter the roller press for rolling. After the electrode piece is cut, the original cutting position in the electrode piece is changed from the middle of the electrode piece to the edge of the unit electrode piece after cutting, which greatly reduces the stress at the cutting position; and there is a gap between the unit electrode pieces, which further ensures that the edges of the two unit electrode pieces will not squeeze each other during rolling, so that when rolling again, they will not wrinkle due to excessive stress. Furthermore, the utility model improves the unevenness caused by uneven pressure and wrinkles of the substrate during the rolling process of the entire electrode piece, and effectively solves the technical problem of ripples in the electrode active material area after rolling. The utility model has a simple structure and a clever design, which can greatly reduce or even avoid the wrinkling of the electrode piece after cutting, thereby improving the quality of the electrode piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic plan view of the structure of a first embodiment of a slitting roller press.

[0037] Figure 2 yes Figure 1 Another arrangement of the first correcting device.

[0038] Figure 3 It is a schematic diagram of the structure of the pole piece and the pole piece cut into unit pole pieces (4 pieces).

[0039] Figure 4 It is a schematic plan view of the structure of the second embodiment of the slitting roller press.

[0040] Figure 5 It is a schematic diagram of the mechanism of the pole piece and the pole piece being cut into unit pole pieces (6 pieces).

[0041] Figure 6 yes Figure 4 Schematic diagram of the planar structure of the separation device.

[0042] Figure 7 yes Figure 6 Schematic diagram of the three-dimensional structure.

[0043] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure of the first floating roller assembly.

[0044] Fig. 9 yes Figure 7 A schematic diagram of the three-dimensional structure of the first swing roller assembly.

[0045] Fig.10 yes Figure 7 Schematic diagram of the three-dimensional structure of the deviation correction and separation implementation mechanism.

[0046] Fig.11 yes Fig.10 Schematic diagram of the partially exploded three-dimensional structure of the first correcting actuator.

[0047] Fig.12 yes Fig.11 Schematic diagram of the further decomposed three-dimensional structure.

[0048] Fig.13 yes Fig.12 Schematic diagram of the three-dimensional structure after complete assembly.

[0049] Fig.14 It is a schematic diagram of the planar structure of the first embodiment of the slitting roller pressing line.

[0050] Fig.15 yes Fig.14 A schematic structural diagram of another arrangement of the second correcting device in FIG.

[0051] Fig.16 It is a three-dimensional structural schematic diagram of the second embodiment of the slitting roller pressing line.

[0052] Fig.17 yes Fig.16 Schematic diagram of the plan structure.

[0053] Fig.18 yes Fig.17 Schematic diagram of the planar structure of the second correcting device in FIG.

[0054] Fig.19 yes Fig.18 Schematic diagram of the three-dimensional structure.

[0055] Fig. 20 yes Fig.19 A schematic diagram of the three-dimensional structure of the second floating roller assembly.

[0056] Fig.21 yes Fig.19 Schematic diagram of the three-dimensional structure of the correction and guidance implementation mechanism.

[0057] Fig. 22 yes Fig.21 Schematic diagram of the three-dimensional decomposition structure of the second correcting actuator.

[0058] Fig.23 It is a schematic diagram of the steps of the slitting and rolling method. DETAILED DESCRIPTION

[0059] See also Figure 1 to Figure 2 , Figure 1 to Figure 2 The first embodiment of the slitting roller press is disclosed, a slitting roller press, first, the conveying direction of the pole piece 9 in the figure is from left to right, the slitting roller press comprises a first slitting machine 1, a separating device 3, and a roller press 2 arranged in sequence along the conveying direction of the pole piece 9, the first slitting machine 1 comprises a first slitting machine body 10, a first driving device 11 and a second driving device 12, the first slitting machine 1 is used to slit the pole piece 9 into a first pole piece group 91 and a second pole piece group 92, the first pole piece group 91 and the second pole piece group 92 respectively have at least one unit pole piece 99, specifically, in this embodiment, the first pole piece group 91 has two slits Unit pole piece 99. In the utility model, a pole piece having a coating area after cutting is defined as a unit pole piece 99. The second pole piece group 92 also has two separated unit pole pieces 99. The roller press 2 includes a first roller 21, a second roller 22, and a driving assembly for driving the first roller 21 and the second roller 22. The roller press 2 is used to roll the unit pole pieces 99 of the first pole piece group 91 and the second pole piece group 92 after cutting. In this embodiment, the first driving device 11 and the second driving device 12 are arranged behind the first slitting machine body 10, and are used to drive the first pole piece group 91 and the second pole piece group 92 respectively.

[0060] In this embodiment, the separation device 3 includes at least two first correcting devices 31, and the at least two first correcting devices 31 are used to further separate the first pole piece group 91 and the second pole piece group 92. Specifically, in this embodiment, there are four first correcting devices 31, and they are arranged horizontally in pairs, such as Figure 1 As shown, they can also be arranged in the vertical direction (such as Figure 2 As shown, the first pole piece group 91 and the second pole piece group 92 are first separated by the first two first deviation correcting devices 31, and then by the second two first deviation correcting devices 31, the two unit pole pieces 99 of the first pole piece group 91 are separated, and the two unit pole pieces 99 of the second pole piece group 92 are separated, so that they are finally separated into four unit pole pieces 99 (as shown in FIG. Figure 3As shown). The four unit pole pieces 99 then enter the roller press for rolling. Since the pole piece 9 is cut, the original position H in the pole piece 9 for cutting is changed from the middle of the pole piece 9 to the edge of the unit pole piece 9 after cutting. This greatly reduces the stress at the position H for cutting. When rolling, it will not wrinkle due to excessive stress. The utility model has a simple structure and a clever design. It can greatly reduce or even avoid the wrinkling of the unit pole piece 99 after cutting, thereby improving the quality of the pole piece 9. Of course, this embodiment is explained by taking four unit pole pieces 99 as an example. In fact, it can be divided into 2-N unit pole pieces according to needs, where N is a positive integer greater than or equal to 3.

[0061] In this embodiment, preferably, the first driving device 11 includes a first swing roller 111 and a first driving roller 112 located behind the first swing roller 111 , and the two unit pole pieces 99 of the first pole piece group 91 are driven to move forward by the driving of the first driving roller 112 .

[0062] In the present invention, preferably, the second driving device 12 includes a second swing roller 121 and a second driving roller 122 located behind the second swing roller 121, and the second driving roller 122 drives the two unit pole pieces 99 of the second pole piece group 92 to move forward.

[0063] In the present invention, preferably, it also includes a second slitting machine 7, which divides the area coated with electrode material in the first electrode group 91 and the second electrode group 92 into two along the length direction of the electrode. The second slitting machine 7 is directly set after the roller press, and the first electrode group 91 and the second electrode group 92 after rolling are cut again and rolled up, which changes the traditional first process of rolling, then cutting (cutting blank area), and then rolling up; then, in the next process, the electrode rolled up in the previous process is unrolled, cut (cutting the area coated with electrode material), and then rolled up; the two processes are combined into one process, so that the equipment cost can be saved, and the cost can be saved by one third; the processing efficiency of the electrode is improved, that is, the processing efficiency can be doubled through the mode of rolling and dividing.

[0064] Preferably, the separation device 3 is used to separate the respective electrode sheets of the first electrode sheet group 91 and the second electrode sheet group 92 obtained after the first slitting machine 1 slits the electrode sheets 9 by a certain interval along the conveying direction thereof.

[0065] Preferably, the interval is 1 to 100 mm.

[0066] Preferably, the separation device 3 includes a separation frame 30, a deviation correction and separation implementation module located on the separation frame 30, at least two first rollers 34, and a first closing roller 35. A first floating roller assembly 32 is provided in front of the deviation correction and separation implementation mechanism 33. The deviation correction and separation implementation module and at least one first roller 34 form one or more deviation correction lines.

[0067] Preferably, the deviation correction and separation implementation module is composed of at least two deviation correction and separation implementation mechanisms 33 arranged along the direction of the pole piece 9.

[0068] Preferably, the first pole piece group 91 and the second pole piece group 92 move on two lines respectively, and are arranged side by side on the same plane on the first closing roller 35 .

[0069] The utility model also provides a second embodiment of the slitting roller press (such as Figures 4 to 7 As shown), it is substantially the same as the first embodiment, except that the separation device 3 includes a separation frame 30, two deviation correction and separation implementation mechanisms 33, two first rollers 34 and a first closing roller 35 arranged along the conveying direction of the pole piece 9 on the separation frame 30, a first floating roller assembly 32 is provided in front of the deviation correction and separation implementation mechanism 33, each of the deviation correction and separation implementation mechanisms 33 and a first roller 34 form a deviation correction line, the first pole piece group 91 includes three independent unit pole pieces 99, the second pole piece group 92 includes three independent unit pole pieces 99, the first pole piece group 91 and the second pole piece group 92 are respectively The two pole pieces 99 move on two lines and merge on the first closing roller 35. In this embodiment, preferably, the separation device 3 also includes a first swing roller assembly 36 and a first tension assembly 37. The first swing roller assembly 36 is arranged behind the first closing roller 35, and the first tension assembly 37 is arranged behind the first swing roller assembly 36. After the unit pole piece 99 is merged on the first closing roller 35, it passes through the first swing roller assembly 36 and the first tension assembly 37. Tension sensors are installed at both ends of the first tension assembly 37, and the swing shaft of the tension swing roller is equipped with a potentiometer. The PLC controls the tension and speed closed loop of the pole piece from the first slitting machine 1 to the roller press 2 through the tension sensor and the potentiometer feedback signal.

[0070] Preferably, the separation device 3 is used to separate the respective electrode sheets of the first electrode sheet group 91 and the second electrode sheet group 92 obtained after the first slitting machine 1 slits the electrode sheets 9 by a certain interval along the conveying direction thereof.

[0071] Preferably, the interval is 1 to 100 mm.

[0072] Preferably, the separation device 3 includes a separation frame 30, a deviation correction and separation implementation module located on the separation frame 30, at least two first rollers 34, and a first closing roller 35. A first floating roller assembly 32 is provided in front of the deviation correction and separation implementation mechanism 33. The deviation correction and separation implementation module and at least one first roller 34 form one or more deviation correction lines.

[0073] Preferably, the deviation correction and separation implementation module is composed of at least two deviation correction and separation implementation mechanisms 33 arranged along the direction of the pole piece 9.

[0074] Preferably, the first pole piece group 91 and the second pole piece group 92 move on two lines respectively, and are arranged side by side on the same plane on the first closing roller 35 .

[0075] In this embodiment, Figure 8 As shown, the main function of the first floating roller assembly 32 is to ensure the stability of the tension of the unit pole piece 99 and to accommodate the change in pole piece length caused by the different longitudinal extensions of multiple unit pole pieces 99. The first floating roller assembly 32 includes a first floating roller 321, a first cylinder 322 for driving the first floating roller 321, and two first floating roller over-rollers 323. The unit pole piece 99 enters the first floating roller 321 through the first floating roller over-rollers 323 in the arrangement of the upper and lower groups of first pole piece groups 91 and second pole piece groups 92. The first floating roller 321 is controlled by a pressure regulating valve to simultaneously enter the first cylinder 322 with two gas paths, one path to offset the deadweight of the floating roller, and the other path to ensure the consistency of the tension of multiple unit pole pieces 99 and accommodate the different longitudinal extensions of multiple unit pole pieces 99.

[0076] In this embodiment, specifically, Fig. 9 As shown, the main function of the first swing roller assembly 36 is to provide stable tension to the multiple unit pole pieces 99 as a whole. The first swing roller assembly 36 includes a first swing roller frame 360, a first swing roller 361, a first swing shaft 362 equipped with a first potentiometer 363, and a first friction cylinder 364. The PLC controls the proportional valve (the proportional valve controls the output of the first friction cylinder 364 to make the first swing roller 361 swing) through the first tension sensor 372 of the first tension assembly 37 and the feedback signal of the first potentiometer 363, thereby controlling the tension and speed closed loop of the multiple unit pole pieces 99.

[0077] In the present embodiment, specifically, the first tension component 37 mainly functions to detect the overall tension exerted on the plurality of unit pole pieces 99 through a tension roller and a tension sensor. Specifically, the pole piece passing through the first swing roller component 36 then passes through the first tension component 37. The first tension component 37 includes a first tension detection roller 371. First tension sensors 372 are mounted at both ends of the first tension detection roller 371 to feedback the overall tension of the plurality of pole pieces.

[0078] In this embodiment, specifically, Fig.10 As shown, the deviation correction and separation implementation mechanism 33 includes a deviation correction and separation installation plate 331, three first deviation correction actuators 332 located on the deviation correction and separation installation plate 331, three first deviation correction sensors 333 corresponding to the first deviation correction actuators 332, and a first position adjustment mechanism 334 for adjusting the position of the first deviation correction sensor 333. The first deviation correction sensor 333 is used to sense the position of the unit pole piece 99. In this embodiment, different sensors can be replaced according to different pole pieces 9 and deviation correction accuracy requirements, including but not limited to ultrasonic sensors, photoelectric sensors, laser sensors, and CCD sensors. The first deviation correction actuator 332 is used to correct the corresponding unit pole piece 99. Specifically, after the unit pole pieces 99 of the first pole piece group 91 and the second pole piece group 92 are separated by the deviation correction and separation implementation mechanism 33, they are separated equidistantly in the horizontal direction to avoid mutual extrusion and friction in the subsequent production process.

[0079] In this embodiment, specifically, Figures 10 to 13 As shown, the first deflection correction actuator 332 includes a first deflection correction actuator seat 3321, a first motor 3322, a first connecting rod 3323, a first hinge 3325, a first mounting plate 3326, and a pair of first deflection correction rollers 3327 located in the first deflection correction actuator seat 3321, the first motor 3322 is connected to the first connecting rod 3323 through a first motor shaft 33220 and can drive the first connecting rod 3323 to move, the first mounting plate 3326 is installed on the first connecting rod 3323, and the first hinge 3325 is installed on the first fixing plate 3328. A pair of first deviation-correcting rollers 3327 are installed on the first mounting plate 3326 below the first mounting plate 3326 and are used to constrain the first mounting plate 3326. Specifically, when the first deviation-correcting actuator 332 in this embodiment is working, the first motor 3322 drives the first connecting rod 3323 to move through the first motor shaft 33220, thereby driving the first mounting plate 3326 to translate. Under the constraint of the first hinge 3325, the first deviation-correcting roller 3327 on the first mounting plate 3326 rotates, thereby realizing the deviation correction of the unit pole piece 99 on the first deviation-correcting roller 3327.

[0080] In this embodiment, preferably, the first slitting machine 1 includes a first slitting frame 13, a first slitting traction mechanism 14, a first slitting knife frame 15 and two first knife-out adjusting rollers 16 arranged along the conveying direction of the pole piece 9 on the first slitting frame 13, the pole piece 9 is cut into a first pole piece group 91 and a second pole piece group 92 through the first slitting knife frame 15, and the first pole piece group 91 and the second pole piece group 92 are respectively output through the two first knife-out adjusting rollers 16. Specifically, during use, the pole pieces 9 of multiple widths are introduced into the first slitting knife frame 15 through the first slitting traction mechanism 14, and the first slitting knife frame 15 divides the pole pieces 9 of multiple widths into multiple unit pole pieces 99 (such as Figure 5 As described above, the divided unit pole pieces 99 pass through two first knife-out adjustment rollers 16 and enter the separation device 3 in the arrangement of the first pole piece group 91 and the second pole piece group 92 in the upper and lower groups.

[0081] The utility model also provides a slitting roller pressing line, such as Figure 14 to Figure 15 What is shown is a first embodiment of a slitting roller press line, comprising an unwinding device 4, a slitting roller press, at least two second deviation correcting devices 5, a second slitting machine 7, and a winding device 6 arranged in sequence along the conveying direction of the battery electrode 9, wherein the slitting roller press is the slitting roller press described in the first embodiment.

[0082] In the utility model, preferably, the unwinding device 4 includes an unwinding roller 41 and an unwinding power device 42 for driving unwinding, and the rolled pole piece 9 is wound on the unwinding roller 41. When unwinding, the unwinding power device 42 drives the unwinding roller 41 to unwind.

[0083] In the present invention, preferably, the second deviation correction device 5 is a deviation correction machine, which is used to correct the first pole piece group 91 and the second pole piece group 92 after rolling. Specifically, in this embodiment, the first pole piece group 91 and the second pole piece group 92 respectively have two unit pole pieces 99. Therefore, there are four deviation correction machines, which are arranged horizontally (such as Figure 4 As shown), of course, they can also be arranged vertically, such as Figure 5 As shown, it is used for correcting the deviation of four unit pole pieces 99.

[0084] In the utility model, preferably, the winding device 6 includes at least two winding rollers 61 and clamping devices 62 corresponding to the number of winding rollers 61, each of the clamping devices 62 is located directly above the winding roller 61 and is arranged corresponding to the winding roller 61. Specifically, in this embodiment, there are four winding rollers 61 and four clamping devices 62, which are used for winding four unit pole pieces.

[0085] In the present invention, the slitting roller pressing line can also be provided with a second implementation mode, such as Figures 16 to 21The second embodiment of the slitting and rolling line is shown. The second embodiment is substantially the same as the first embodiment, except that: the slitting and rolling machine is the slitting and rolling machine of the second embodiment. After the unit pole pieces 9 separated at equal distances are combined into a group of pole paths by the first closing roller 35 of the separation device 3, they enter the rolling machine 2 together. The rolling machine 2 provides a stable rolling force to compact the pole pieces by the hydraulic cylinder. The compacted unit pole pieces 99 then enter the thickness measuring unit 8, and the thickness of the unit pole pieces 99 after rolling is detected by a laser thickness gauge. In order to correct the lateral displacement of the unit pole piece 99 in the rolling machine 2 and the thickness measuring unit 8, the unit pole piece 99 needs to be corrected in the lateral position before the secondary slitting. After passing the thickness measuring unit 8, the unit pole piece 99 enters the second deviation correction device 5 for correction.

[0086] In this embodiment, specifically, Fig.18 and 19 As shown, the second deflection-correcting device 5 includes a second deflection-correcting frame 50, two deflection-correcting and guiding implementing mechanisms 53, two second passing rollers 54 and a second closing roller 55 arranged along the conveying direction of the pole piece 9 on the second deflection-correcting frame 50, a second floating roller assembly 52 is arranged in front of the deflection-correcting and guiding implementing mechanism 53, each of the deflection-correcting and guiding implementing mechanism 53 and a second passing roller 54 form a deflection-correcting line, the first pole piece group 91 includes a plurality of independent unit pole pieces 99, the second pole piece group 92 includes a plurality of independent unit pole pieces 99, the first pole piece group 91 and the second pole piece group 92 move on two lines respectively, and merge on the second closing roller 55, In this embodiment, it also includes a third closing roller 58, a second swing roller assembly 56 and a second tension assembly 57. The third closing roller 58 is arranged between the second floating roller assembly 52 and the deviation correction and guiding implementation mechanism 53, the second swing roller assembly 56 is arranged between the third closing roller 58 and the second floating roller assembly 52, and the second tension assembly 57 is arranged between the second floating roller assembly 52 and the second swing roller assembly 56. In this embodiment, tension sensors are installed at both ends of the second tension assembly 57, and a potentiometer is installed on the swing shaft of the second swing roller assembly 56. The PLC controls the tension and speed closed loop of the unit pole piece 99 from the roller press 2 to the second slitting machine 7 through the tension sensor and the potentiometer feedback signal.

[0087] like Fig. 20As shown, the second floating roller assembly 52 is mainly used to ensure the stability of the tension of the unit pole piece 99 and to accommodate the change in pole piece length caused by the different longitudinal extensions of multiple unit pole pieces 99. The second floating roller assembly 52 includes a second floating roller 521, a second cylinder 522 for driving the second floating roller 521, and a second floating roller over-roller 523. The unit pole piece 99 enters the second floating roller 521 through the second floating roller over-roller 523 in the arrangement of the upper and lower groups of the first pole piece group 91 and the second pole piece group 92. The second floating roller 521 is controlled by a pressure regulating valve to simultaneously enter the second cylinder 522 with two gas paths, one of which offsets the deadweight of the second floating roller 521, and the other ensures that the tension of multiple unit pole pieces 99 is consistent and accommodates the different longitudinal extensions of multiple unit pole pieces 99.

[0088] In this embodiment, the second swing roller assembly 56 and the second tension assembly 57 have the same structures as the first swing roller assembly and the first tension assembly, respectively, and are not described in detail herein.

[0089] In this embodiment, specifically, Fig.21 As shown, the deflection correction and guiding implementation mechanism 53 includes a deflection correction and guiding installation plate 531, three second deflection correction actuators 532 located on the deflection correction and guiding installation plate 531, three second deflection correction sensors 533 arranged one by one corresponding to the second deflection correction actuators 532, and a second position adjustment mechanism 534 for adjusting the position of the second deflection correction sensor 533, the second deflection correction sensor 533 is used to sense the position of the unit pole piece 99, and the second deflection correction actuator 532 is used to correct the unit pole piece 99, which can be replaced according to different pole pieces and deflection correction accuracy requirements Different sensors include but are not limited to ultrasonic sensors, photoelectric sensors, laser sensors, and CCD sensors; specifically, in this embodiment, after the unit pole piece 99 is merged by the third closing roller 58, the upper and lower first pole piece group 91 and second pole piece group 92 enter the deflection correction and guiding implementation mechanism 53 again, and the deflection correction and guiding implementation mechanism 53 corrects the lateral position deviation of the unit pole piece 99 that occurred previously, so that the lateral position of each unit pole piece 99 corresponds to the centering and slitting position of the second slitting blade holder 72 of the second slitting machine 7, thereby ensuring the accuracy of the secondary slitting width. The two groups of pole pieces are merged on the second closing roller 55, and then enter the second slitting machine 7.

[0090] In this embodiment, specifically, Fig. 22As shown, the second deflection correcting actuator 532 has the same structure as the first deflection correcting actuator 332. Specifically, the second deflection correcting actuator 532 includes a second deflection correcting actuator seat 5321, a second motor 5322, a second connecting rod 5323, a second hinge 5325, a second mounting plate 5326, and a pair of second deflection correcting rollers 5327 located in the second deflection correcting actuator seat 5321, the second motor 5322 is connected to the second connecting rod 5323 and can drive the second connecting rod 5323 to move, the second mounting plate 5326 is installed on the second connecting rod 5323, and the second hinge 5325 is installed on the second connecting rod 5323. Installed below the second mounting plate 5326 and used to constrain the second mounting plate 5326, a pair of second correcting rollers 5327 are installed on the second mounting plate 5326. Specifically, when the second correcting actuator 532 in this embodiment is working, the second motor 5322 drives the second connecting rod 5323 to move through the second motor shaft 53220, thereby driving the second mounting plate 5326 to translate. Under the constraint of the second hinge 5325, the second correcting roller 5327 on the second mounting plate 5326 rotates, thereby realizing the correction of the unit pole piece 99 on the second correcting roller 5327.

[0091] In the present invention, preferably, the second slitting machine 7 has the same structure as the first slitting machine 1, which will not be described in detail here.

[0092] In the present invention, preferably, the winding device 6 includes at least two winding rollers 61 and clamping devices 62 corresponding to the number of winding rollers 61, and each of the clamping devices 62 is located directly above the winding roller 61 and is arranged corresponding to the winding roller 61. Specifically, in the present invention, the unit pole pieces 9 after centering and slitting enter the winding device 6 in two groups arranged in an upper and lower manner, and the winding device 6 is equipped with two slip shafts to complete the neat winding of the two groups of unit pole pieces 9.

[0093] The utility model also provides a slitting and rolling method, such as Fig.23 As shown, the following steps are included:

[0094] (S1), first cutting: at least two coating areas are provided on the pole piece 9 along the length direction of the pole piece 9, and a blank area is provided between the two adjacent coating areas. The pole piece 9 is cut into a first pole piece group 91 and a second pole piece group 92 along the blank area on the pole piece 9 by a first cutting machine 1. The first pole piece group 91 and the second pole piece group 92 each have at least one coating area. The first pole piece group 91 includes a plurality of independent unit pole pieces 99, and the second pole piece group 92 includes a plurality of independent unit pole pieces 99;

[0095] (S2), separation: the deviation correction and separation implementing mechanism 33 of the separation device 3 further separates the first pole piece group 91 and the second pole piece group 92 laterally, until the first pole piece group 91 is separated into independent unit pole pieces 99, and the second pole piece group 92 is separated into independent unit pole pieces 99, and the plurality of unit pole pieces 99 are rolled together by the first closing roller 35;

[0096] ( S3 ) Rolling: The roller press 2 rolls the plurality of unit pole pieces 99 formed after the pole pieces 9 are separated.

[0097] In the present invention, preferably, an unwinding step is further included before the (S1) slitting step, wherein the pole piece 9 is wound on an unwinding roller 41 , and an unwinding power device 42 drives the unwinding roller 41 to unwind.

[0098] In the present invention, preferably, a thickness measuring step is further included after the rolling step (S3), for monitoring the thickness of the unit pole piece 99 after the rolling step.

[0099] In the present invention, preferably, a deviation correction step is further included after the thickness measuring step, and the second deviation correction device 5 performs lateral position deviation correction on a plurality of unit pole pieces 99 after rolling.

[0100] In the present invention, preferably, a second slitting step is further included after the deviation correction step, wherein the second slitting machine 7 divides the area coated with the electrode material in the plurality of unit electrodes 99 into two parts along the middle position along the length direction of the electrode.

[0101] In the present invention, preferably, a winding step is further included after the second slitting step, and the winding roller 61 winds up all the unit pole pieces 99 after slitting.

[0102] The method described in the utility model is used for slitting and rolling. Since the rolling is performed after slitting into unit pole pieces 99, during the actual rolling process, the pulling force of the roller press on the coating area on the unit pole piece 99 is completely consistent, and the blank area is located in the middle of the two coating areas in the original pole piece 9, and becomes the edge area after slitting, which avoids the problem of wrinkles in the blank area; in addition, the utility model integrates the first slitting of the pole piece, the rolling of the pole piece, and the secondary slitting of the pole piece into one device. The existing technology requires a rolling and slitting all-in-one machine plus multiple secondary slitting machines to complete it. Compared with the existing technology, it can reduce the space layout, procurement cost and labor cost. The method and equipment of the utility model overcome the prejudice of the existing technology and achieve unexpected technical effects.

[0103] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A slitting roller press, characterized in that: The invention comprises a first slitting machine (1), a separating device (3) and a roller press (2) which are arranged in sequence along the conveying direction of unslit and unrolled pole pieces (9); the first slitting machine (1) comprises at least a first slitting machine body (10); the first slitting machine (1) is used to slit the pole piece (9) into at least a first pole piece group (91) and a second pole piece group (92) along a blank area of ​​the pole piece (9); the roller press (2) comprises at least a first roller (21), a second roller (22), and a driving assembly for driving the first roller (21) and the second roller (22); the roller press (2) is used to roll the first pole piece group (91) and the second pole piece group (92) after slitting.

2. The slitting roller press according to claim 1, characterized in that: The blank area along the pole piece (9) is a blank area between at least two lines of electrode active material coated on the pole piece.

3. The slitting roller press according to claim 1, characterized in that: The first pole piece group (91) and the second pole piece group (92) respectively include one or more independent unit pole pieces (99).

4. The slitting roller press according to claim 1, characterized in that: The separation device (3) is used to separate the individual pole pieces of the first pole piece group (91) and the second pole piece group (92) obtained after the first pole piece (9) is cut by the first slitting machine (1) at a certain interval along the conveying direction thereof.

5. The slitting roller press according to claim 4, characterized in that: The interval is 1 to 100 mm.

6. The slitting roller press according to claim 4, characterized in that: The separation device (3) comprises a separation frame (30), a deviation correction and separation implementation module located on the separation frame (30), at least two first passing rollers (34), and a first closing roller (35); the deviation correction and separation implementation module is composed of at least two deviation correction and separation implementation mechanisms (33) arranged along the direction of the pole piece (9); a first floating roller assembly (32) is arranged in front of the deviation correction and separation implementation mechanism (33); the deviation correction and separation implementation module and at least one first passing roller (34) form one or more deviation correction lines.

7. The slitting roller press according to claim 6, characterized in that: The first pole piece group (91) and the second pole piece group (92) move on two lines respectively, and are arranged side by side on the same plane on the first closing roller (35).

8. The slitting roller press according to claim 6, characterized in that: The deflection correction and separation implementation mechanism (33) comprises a deflection correction and separation installation plate (331), a first deflection correction actuator (332) located on the deflection correction and separation installation plate (331), a first deflection correction sensor (333) which is equal in number to the first deflection correction actuator (332) and is arranged in a one-to-one correspondence, and a first position adjustment mechanism (334) for adjusting the position of the first deflection correction sensor (333).

9. The slitting roller press according to claim 8, characterized in that: The number of the first deviation-correcting actuators (332) is equal to the number of unit pole pieces (99) of the first pole piece group (91) or the second pole piece group (92).

10. The slitting roller press according to claim 8, characterized in that: The first deviation correction sensor (333) is used to sense the position of the unit pole piece (99), and the first deviation correction actuator (332) is used to correct the deviation of the unit pole piece (99).

11. The slitting roller press according to claim 8, characterized in that: The first deflection correcting actuator (332) comprises a first deflection correcting actuator seat (3321), a first motor (3322) located in the first deflection correcting actuator seat (3321), a first connecting rod (3323), a first hinge (3325), a first mounting plate (3326), and a pair of first deflection correcting rollers (3327), wherein the first motor (3322) is connected to the first connecting rod (3323) and can drive the first connecting rod (3323) to move, the first mounting plate (3326) is mounted on the first connecting rod (3323), the first hinge (3325) is mounted below the first mounting plate (3326) and is used to constrain the first mounting plate (3326), and the pair of first deflection correcting rollers (3327) are mounted on the first mounting plate (3326).

12. The slitting roller press according to claim 8, characterized in that: It also comprises a first swing roller assembly (36), wherein the first swing roller assembly (36) is arranged behind the first closing roller (35).

13. The slitting roller press according to claim 12, characterized in that: It also includes a first tension component (37), wherein the first tension component (37) is arranged behind the first swing roller component (36).

14. The slitting roller press according to any one of claims 1 to 13, characterized in that: The first slitting machine (1) comprises a first slitting frame (13), a first slitting traction mechanism (14) arranged on the first slitting frame (13) along the conveying direction of the pole piece (9), a first slitting knife frame (15) and two first knife-out regulating rollers (16); the pole piece (9) is slit into a first pole piece group (91) and a second pole piece group (92) by the first slitting knife frame (15); the first pole piece group (91) and the second pole piece group (92) are respectively output by the two first knife-out regulating rollers (16).

15. A slitting roller press line, characterized in that: The invention comprises an unwinding device (4), a slitting roller press, a second deviation correcting device (5), a second slitting machine (7), and a winding device (6) which are sequentially arranged along the conveying direction of the battery electrode sheet (9), wherein the slitting roller press is the slitting roller press according to any one of claims 1 to 14.

16. The slitting roller creasing line according to claim 15, characterized in that: The slitting roller pressing line includes at least two second deviation correcting devices.

17. The slitting roller line according to claim 15, characterized in that: The second deflection correcting device (5) comprises a second deflection correcting frame (50), two deflection correcting and guiding implementing mechanisms (53) arranged on the second deflection correcting frame (50) along the conveying direction of the pole piece (9), at least two second passing rollers (54), and a second closing roller (55), a second floating roller assembly (52) is arranged in front of the deflection correcting and guiding implementing mechanism (53), each of the deflection correcting and guiding implementing mechanisms (53) and at least one second passing roller (54) form a deflection correcting line, the first pole piece group (91) comprises a plurality of independent unit pole pieces (99), and the second pole piece group (92) comprises a plurality of independent unit pole pieces (99). The first pole piece group (91) and the second pole piece group (92) move on two lines respectively and merge on the second closing roller (55).

18. The slitting roller creasing line according to claim 17, characterized in that: The deflection correction and guiding implementation mechanism (53) comprises a deflection correction and guiding installation plate (531), at least two second deflection correction actuators (532) located on the deflection correction and guiding installation plate (531), second deflection correction sensors (533) equal in number to the second deflection correction actuators (532) and arranged in a one-to-one correspondence, and a second position adjustment mechanism (534) for adjusting the position of the second deflection correction sensors (533), wherein the second deflection correction sensors (533) are used to sense the position of the unit pole piece (99), and the second deflection correction actuators (532) are used to correct the deflection of the unit pole piece (99).

19. The slitting roller line according to claim 18, characterized in that: The number of the second deviation-correcting actuators (532) is equal to the number of unit pole pieces (99) of the first pole piece group (91) or / and the second pole piece group (92).

20. The slitting roller creasing line according to claim 18, characterized in that: The second deflection correcting actuator (532) comprises a second deflection correcting actuator seat (5321), a second motor (5322) located in the second deflection correcting actuator seat (5321), a second connecting rod (5323), a second hinge (5325), a second mounting plate (5326), and a pair of second deflection correcting rollers (5327), wherein the second motor (5322) is connected to the second connecting rod (5323) and can drive the second connecting rod (5323) to move, the second mounting plate (5326) is mounted on the second connecting rod (5323), the second hinge (5325) is mounted below the second mounting plate (5326) and is used to constrain the second mounting plate (5326), and the pair of second deflection correcting rollers (5327) are mounted on the second mounting plate (5326).

21. The slitting roller line according to claim 20, characterized in that: It also includes a third closing roller (58), wherein the third closing roller (58) is arranged between the second floating roller assembly (52) and the deviation correction and guiding implementation mechanism (53).

22. The slitting roller creasing line according to claim 21, characterized in that: It also includes a second swing roller assembly (56), wherein the second swing roller assembly (56) is arranged between the third closing roller (58) and the second floating roller assembly (52).

23. The slitting roller line according to claim 22, characterized in that: It also includes a second tension assembly (57), wherein the second tension assembly (57) is arranged between the second floating roller assembly (52) and the second swing roller assembly (56).

24. The slitting roller creasing line according to claim 15, characterized in that: The second slitting machine (7) has the same structure as the first slitting machine (1) described in any one of claims 1 to 13.

25. The slitting roller line according to claim 15, characterized in that: The winding device (6) comprises at least two winding rollers (61) and a number of pressing devices (62) corresponding to the number of winding rollers (61), each of the pressing devices (62) being located directly above the winding roller (61) and being arranged corresponding to the winding roller (61).

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