Double-unwinding and double-winding roller press for lithium battery pole pieces

Abstract

The invention relates to the technical field of lithium battery pole piece processing, in particular to a lithium battery pole piece double-unwinding and double-winding roller press which comprises a double-path unwinding unit, and a double-path buffering unit, a double-path front stretching unit, a rolling unit, a double-path rear stretching unit, a thickness measuring unit and a first double-path winding unit are sequentially arranged on the right side of the double-path unwinding unit. A first air expansion shaft, a first deviation rectifying actuator, a second air expansion shaft and a second deviation rectifying actuator are sequentially arranged in the two-way unwinding unit from top to bottom. The device can perform independent closed-loop control on tension applied to two pole pieces and synchronous control on the speeds of the two pole pieces, can adapt to coiled pole pieces with different widths and coiling diameters, can independently adjust the transverse positions of the two pole pieces on the passing roller and the roller, ensures the accuracy of the required positions of the two pole pieces, prevents the problems of transverse movement, wrinkling, overlapping, unstable coiling and the like of the pole pieces on the roller surface, and improves the production efficiency. And double-section independent roller passing assemblies are adopted on all combined sheet paths, so that the influence of the tension and speed of the two sheets on each other is isolated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery pole piece processing, in particular to a double-feeding and double-receiving roller press for lithium battery pole pieces. BACKGROUND

[0002] The "lithium battery pole piece" is a key component in a lithium ion battery (including a lithium polymer battery) and is essentially an electrode plate that loads or stores lithium ions.

[0003] Although the patent application No. CN202121602111.1 discloses a roller pressing device, the application can provide stable tension, but in the lithium battery pole piece processing process, the double-feeding and double-receiving can improve the production efficiency and equipment utilization rate of the roller pressing process, and speed up the circulation rate of the rolled pole piece. With the continuous change of the diameter and width of the two pole pieces, when the width of the two pole pieces is consistent but the diameter is different, or when the diameter is consistent but the width is different, the tension and speed received by the pole pieces are not reasonable, the pole pieces move transversely on the roller surface or the roller surface, and the tension control and speed synchronization of the two pole pieces are required to be higher. During the roller pressing process, because the tension and speed received by the pole pieces are not reasonable, the friction force of the pole piece surface to the roller surface is inconsistent, which causes the pole piece to overlap and break, the pole piece to wrinkle and break, or the pole piece to expand inconsistently on both sides, resulting in an unstable pole piece arc height and unstable winding. This problem needs to be improved. SUMMARY

[0004] The purpose of the present application is to provide a double-feeding and double-receiving roller press for lithium battery pole pieces to solve the problems in the background art.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a double-feeding and double-receiving roller press for lithium battery pole pieces, comprising a double-path unwinding unit, a double-path buffer unit, a double-path front stretching unit, a roller pressing unit, a double-path rear stretching unit, a thickness measuring unit and a first double-path winding unit are sequentially arranged on the right side of the double-path unwinding unit, a gas expansion shaft one, a deviation correction actuator one, a gas expansion shaft two and a deviation correction actuator two are sequentially arranged inside the double-path unwinding unit from top to bottom, and a double-segment independent roller passing assembly six is arranged at the bottom of the thickness measuring unit.

[0006] According to the above technical scheme, the double-path buffer unit is composed of a deviation correction sensor one, a belt receiving platform assembly one, a double-segment independent roller passing assembly one, a swing roller assembly one, a tension assembly one, a swing roller assembly two, a tension assembly two, a double-segment independent roller passing assembly two, a dust and iron removal assembly one and a double-segment independent roller passing assembly three; The deviation correction sensor is fixedly connected to the left side in the double-path buffer unit, the first belt receiving platform assembly is fixedly connected to the top left side in the double-path buffer unit, the first double-segment independent over roller assembly is arranged on the right side of the first belt receiving platform assembly, the first swing roller assembly is arranged on the top in the double-path buffer unit, the first tension assembly is fixedly connected to the lower right side of the first swing roller assembly, the second swing roller assembly is arranged on the left side in the double-path buffer unit, the second tension assembly is fixedly connected to the middle in the double-path buffer unit, the second double-segment independent over roller assembly is fixedly connected to the double-path buffer unit and is located below the right of the second tension assembly, the first dust and iron removal assembly is fixedly connected to the right side in the double-path buffer unit, and the third double-segment independent over roller assembly is fixedly connected to the top right side in the double-path buffer unit. After the two polar pieces are independently discharged by the air expansion shaft one and the air expansion shaft two of the double-path unwinding unit, the two polar pieces enter the double-path buffer unit, and the deviation correction sensor one feeds the positions of the two polar pieces to the deviation correction actuators one and two of the double-path unwinding unit, respectively, so that the two polar pieces are individually and integrally corrected, the accuracy of the required positions of the two polar pieces is ensured, and the polar pieces are prevented from transversely moving, wrinkling and overlapping on the roller surface.

[0007] According to the technical scheme, the double-path front stretching unit is composed of a traction assembly one, a swing roller assembly three, a tension assembly three, a traction assembly two, a swing roller assembly four and a tension assembly four. The traction assembly one is fixedly connected to the top left side in the double-path front stretching unit, the swing roller assembly three is fixedly connected to the top middle in the double-path front stretching unit, the tension assembly three is fixedly connected to the right side in the double-path front stretching unit, the traction assembly two is fixedly connected to the bottom left side in the double-path front stretching unit, the swing roller assembly four is fixedly connected to the middle in the double-path front stretching unit, the tension assembly four is fixedly connected to the right side in the double-path front stretching unit and is located below the tension assembly three. The two polar pieces enter the traction assembly one, the swing roller assembly three, the tension assembly three, the traction assembly two, the swing roller assembly four and the tension assembly four, respectively, the traction assembly one and the traction assembly two isolate the tension of the two polar pieces in the front section, the swing roller assembly three and the swing roller assembly four output the tension of the two polar pieces, the tension assembly three and the tension assembly four feed back the tension of the two polar pieces, the tension closed loop and the speed synchronization of the two polar pieces from the double-path front stretching unit to the roller pressing unit are controlled, the two polar pieces are independently and synchronously stretched in the blanking foil area, the extension of the polar piece area and the blanking foil area is ensured to be consistent, and the polar piece wrinkling and belt breaking problems are prevented.

[0008] According to the technical scheme, the roller pressing unit is composed of a fourth double-segment independent over roller assembly, a hydraulic oil cylinder and a fifth double-segment independent over roller assembly. The fourth double-segment independent over roller assembly is fixedly connected to the bottom left side in the roller pressing unit, the hydraulic oil cylinder is fixedly connected to the middle of the bottom in the roller pressing unit, and the fifth double-segment independent over roller assembly is fixedly connected to the bottom right side in the roller pressing unit. The two-pole piece is combined into the rolling unit at five places of the double-segment independent over-roll assembly, the rolling unit provides stable rolling force to the two-pole piece by the hydraulic oil cylinder for compaction, and the compacted two-pole piece enters the double-path rear stretching unit according to the predetermined piece path at five places of the double-segment independent over-roll assembly.

[0009] According to the technical scheme, the double-path rear stretching unit is composed of the tension assembly five, the swing roller assembly five, the traction assembly three, the tension assembly six, the swing roller assembly six and the traction assembly four; The tension assembly five is fixedly connected to the left top in the double-path rear stretching unit, the swing roller assembly five is fixedly connected to the top in the double-path rear stretching unit, the traction assembly three is fixedly connected to the right side in the double-path rear stretching unit, the tension assembly six is fixedly connected to the left side in the double-path rear stretching unit and is located below the tension assembly five, the swing roller assembly six is arranged in the middle of the double-path rear stretching unit, and the traction assembly four is arranged at the right bottom of the double-path rear stretching unit. The two-pole pieces enter the tension assembly five, the swing roller assembly five, the traction assembly three, the tension assembly six, the swing roller assembly six and the traction assembly four, the rolling unit insulates the tension of the two-pole pieces in the front segment, the traction assembly three and the traction assembly four insulate the influence of the tension of the two-pole pieces on the thickness measuring unit and the tension of the first double-path winding unit, the swing roller assembly five and the swing roller assembly six output the tension of the two-pole pieces, the tension assembly five and the tension assembly six feed back the tension of the two-pole pieces, control the tension closed loop and the speed synchronization of the two-pole pieces from the rolling unit to the double-path front stretching unit, and independently stretch the two-pole pieces again, so as to ensure the extension consistency of the pole piece material area and the blanking foil area and prevent the pole piece from wrinkling and breaking.

[0010] According to the technical scheme, the first double-path winding unit is composed of the dust and iron removal assembly three, the belt receiving platform, the double-segment independent over-roll assembly seven, the process deviation rectifying assembly one, the tension assembly seven, the air expansion shaft three, the process deviation rectifying assembly two, the tension assembly eight and the air expansion shaft four; The dust and iron removal assembly three is fixedly connected to the left side in the first double-path winding unit, the belt receiving platform and the double-segment independent over-roll assembly seven are arranged at the top left side in the first double-path winding unit, the process deviation rectifying assembly one is fixedly connected to the top in the first double-path winding unit, the tension assembly seven is fixedly connected to the inside of the first double-path winding unit and is located below the process deviation rectifying assembly one, the air expansion shaft three is fixedly connected to the right top in the first double-path winding unit, the process deviation rectifying assembly two is fixedly connected to the inside of the first double-path winding unit and is located below the double-segment independent over-roll assembly seven, the tension assembly eight is fixedly connected to the inside of the first double-path winding unit and is located below the tension assembly seven, and the air expansion shaft four is fixedly connected to the right bottom in the first double-path winding unit.

[0011] According to the above technical scheme, the second double-path winding unit is composed of the second dust and iron removal assembly, the second belt receiving platform assembly, the first tension detection assembly, the second tension detection assembly, the second deviation correction sensor, the third deviation correction sensor, the first separate overall deviation correction assembly and the second separate overall deviation correction assembly.

[0012] According to the above technical scheme, the four-path winding unit is composed of the first slip shaft assembly, the second slip shaft assembly and the slitting assembly.

[0013] According to the above technical scheme, the two rolls of pole pieces pass through the first deviation correction sensor, the first belt receiving platform assembly and the first double-segment independent roller assembly, and then enter the first swing roller assembly, the first tension assembly, the second swing roller assembly and the second tension assembly according to the predetermined piece path, the swing roller assembly and the swing roller assembly output tension to the two pole pieces, the first tension assembly and the second tension assembly feedback the tension of the two pole pieces, control the tension closed loop and speed synchronization of the two pole pieces between the double-path unwinding unit and the double-path buffer unit, and after the two pole pieces are cleaned by the first dust and iron removal assembly at the second double-segment independent roller assembly, the two pole pieces enter the double-path pre-stretching unit according to the predetermined piece path at the third double-segment independent roller assembly.

[0014] According to the above technical scheme, the first double-path winding unit is mirrored as a whole, and the second dust and iron removal assembly, the second belt receiving platform assembly, the first tension detection assembly, the second tension detection assembly, the second deviation correction sensor and the third deviation correction sensor are added, and the first separate overall deviation correction assembly and the second separate overall deviation correction assembly are used instead of the first process deviation correction assembly and the second process deviation correction assembly to form a new second double-path winding unit, which replaces the original first double-path winding unit to form a new double-unwinding and double-winding roller press.

[0015] According to the above technical scheme, the first double-path winding unit is mirrored as a whole, and the second dust and iron removal assembly, the second belt receiving platform assembly, the first tension detection assembly, the second tension detection assembly, the second deviation correction sensor and the third deviation correction sensor are added, and the first separate overall deviation correction assembly and the second separate overall deviation correction assembly are used instead of the first process deviation correction assembly and the second process deviation correction assembly to form a new second double-path winding unit, which replaces the original first double-path winding unit to form a new double-unwinding and double-winding roller press.

[0016] The double-path unwinding unit mainly functions to complete the synchronous independent unwinding of two rolls of wound pole pieces, provide stable unwinding tension, and perform separate overall deviation correction on the two rolls of pole pieces to avoid mutual friction and overlap during the unwinding process.

[0017] The double-path buffer unit is located after the double-path unwinding unit, and mainly functions to control the tension closed loop and speed synchronization of the two pole pieces separately, and clean the pole pieces through multiple dust and iron removal assemblies.

[0018] The double-path front stretching unit is behind the double-path buffer unit, and the double-path rear stretching unit is behind the roller pressing unit. The main function is to independently and synchronously stretch the blank foil area of the two pole pieces, ensure the extension consistency of the pole piece material area and the blank foil area, and prevent the pole piece from wrinkling and breaking.

[0019] The roller pressing unit is behind the double-path front stretching unit. The main function is to compact the two pole pieces through the rolling force between the upper and lower rollers to obtain pole pieces with a process thickness.

[0020] The thickness measuring unit is behind the double-path rear stretching unit. The main function is to monitor the thickness of the two pole pieces after roller pressing.

[0021] The first double-path winding unit and the second double-path winding unit are behind the thickness measuring unit. The main function is to clean the two pole pieces after roller pressing through multiple dust and iron removal components, and guide the two pole pieces to the correct position for separate and neat winding.

[0022] Compared with the prior art, the beneficial effects achieved by the present application are: 1. The present application can independently close-loop control the tension of the two pole pieces, and synchronously control the speed of the two pole pieces, which can adapt to pole pieces of different widths and winding diameters; 2. The present application can independently adjust the transverse position of the two pole pieces on the roller and the rolling roller, ensure the accuracy of the required position of the two pole pieces, and prevent the pole pieces from transversely moving on the roller surface, wrinkling, overlapping, and unstable winding, etc.; 3. The present application uses double-section independent roller passing components on all combined piece paths, which isolates the influence of the tension and speed of the two pole pieces on each other; 4. The present application can produce pole pieces at twice the capacity of a conventional roller pressing machine, and can be switched to a conventional roller pressing machine at any time, which can reduce space layout, reduce procurement cost and labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figure 1 is a sectional view of the double-put-double-take roller pressing machine of the present application; Figure 2 is a sectional view of the double-path unwinding unit of the present application; Figure 3 is a sectional view of the double-path buffer unit of the present application; Figure 4 is a sectional view of the double-path front stretching unit of the present application; Figure 5 is a sectional view of the roller pressing unit of the present application; Figure 6 is a sectional view of the double-path rear stretching unit of the present application; Figure 7 is a sectional view of the thickness measuring unit of the present application; Figure 8 is a sectional view of the first double-path winding unit of the present application; Figure 9 is a side view of the double-segment independent roller and two-pole piece of the present application; Figure 10 is a side view of the second double-path winding unit of the present application; Figure 11 is a side view of the four-path winding unit of the present application.

[0024] In the figure: 1, double-path unwinding unit; 2, double-path buffer unit; 21, deviation correction sensor one; 22, belt receiving platform assembly one; 23, double-segment independent roller assembly one; 24, swing roller assembly one; 25, tension assembly one; 26, swing roller assembly two; 27, tension assembly two; 28, double-segment independent roller assembly two; 29, dust and iron removal assembly one; 291, double-segment independent roller assembly three; 3, double-path front stretching unit; 31, traction assembly one; 32, swing roller assembly three; 33, tension assembly three; 34, traction assembly two; 35, swing roller assembly four; 36, tension assembly four; 4, roller pressing unit; 41, double-segment independent roller assembly four; 42, hydraulic oil cylinder; 43, double-segment independent roller assembly five; 5, double-path rear stretching unit; 51, tension assembly five; 52, swing roller assembly five; 53, traction assembly three; 54, tension assembly six; 55, swing roller assembly six; 56, traction assembly four; 6, thickness measuring unit; 61, double-segment independent roller assembly six; 7, first double-path winding unit; 71, dust and iron removal assembly three; 72, belt receiving platform; 73, double-segment independent roller assembly seven; 74, process deviation correction assembly one; 75, tension assembly seven; 76, gas expansion shaft three; 77, process deviation correction assembly two; 78, tension assembly eight; 79, gas expansion shaft four; 8, second double-path winding unit; 81, dust and iron removal assembly two; 82, belt receiving platform assembly two; 83, tension detection assembly one; 84, tension detection assembly two; 85, deviation correction sensor two; 86, deviation correction sensor three; 87, separate overall deviation correction assembly one; 88, separate overall deviation correction assembly two; 9, four-path winding unit; 91, slip shaft assembly one; 92, slip shaft assembly two; 93, slitting assembly; 11, gas expansion shaft one; 12, gas expansion shaft two; 13, deviation correction actuator one; 14, deviation correction actuator two. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0026] Examples of the described embodiments are shown in the accompanying drawings, wherein like or similar designations are used to denote like or similar elements or elements having the same or similar function throughout the figures. The embodiments described below by reference to the drawings are exemplary and are intended to be illustrative of the present application, and are not to be construed as limiting the present application.

[0027] Embodiment one, please refer to Figures 1-11 The present application provides a technical scheme: a double-unwinding and double-winding roller press for lithium battery pole pieces, comprising a double-unwinding unit 1, a double-buffering unit 2, a double-front-stretching unit 3, a roller pressing unit 4, a double-back-stretching unit 5, a thickness measuring unit 6 and a first double-winding unit 7 are sequentially arranged on the right side of the double-unwinding unit 1, and a gas expansion shaft one 11, a deviation rectifying actuator one 13, a gas expansion shaft two 12 and a deviation rectifying actuator two 14 are sequentially arranged in the double-unwinding unit 1 from top to bottom, and a double-segment independent roller assembly six 61 is arranged at the bottom of the thickness measuring unit 6.

[0028] The double-buffering unit 2 is composed of a deviation rectifying sensor one 21, a belt receiving platform assembly one 22, a double-segment independent roller assembly one 23, a swing roller assembly one 24, a tension assembly one 25, a swing roller assembly two 26, a tension assembly two 27, a double-segment independent roller assembly two 28, a dust and iron removing assembly one 29 and a double-segment independent roller assembly three 291.

[0029] The deviation rectifying sensor one 21 is fixedly connected to the left side in the double-buffering unit 2, the belt receiving platform assembly one 22 is fixedly connected to the top left side in the double-buffering unit 2, the double-segment independent roller assembly one is arranged on the right side of the belt receiving platform assembly one 22, the swing roller assembly one 24 is arranged on the top of the double-buffering unit 2, the tension assembly one 25 is fixedly connected to the lower right side of the swing roller assembly one 24, the swing roller assembly two 26 is arranged on the left side in the double-buffering unit 2, the tension assembly two 27 is fixedly connected to the middle of the double-buffering unit 2, the double-segment independent roller assembly two 28 is fixedly connected to the double-buffering unit 2 and is located below the right of the tension assembly two 27, the dust and iron removing assembly one 29 is fixedly connected to the right side in the double-buffering unit 2, and the double-segment independent roller assembly three 291 is fixedly connected to the top right side in the double-buffering unit 2.

[0030] After the two rolls of pole pieces are independently unwound by the gas expansion shaft one 11 and the gas expansion shaft two 12 of the double-unwinding unit 1, the two pole pieces enter the double-buffering unit 2, and the deviation rectifying sensor one 21 feeds back the positions of the two pole pieces to the deviation rectifying actuator one 13 and the deviation rectifying actuator two 14 of the double-unwinding unit 1, respectively, to individually rectify the whole two rolls of pole pieces, thereby ensuring the accuracy of the required positions of the two pole pieces and preventing the pole pieces from moving transversely on the roller surface, wrinkling and overlapping.

[0031] The double-front-stretching unit 3 is composed of a traction assembly one 31, a swing roller assembly three 32, a tension assembly three 33, a traction assembly two 34, a swing roller assembly four 35 and a tension assembly four 36.

[0032] The traction assembly one 31 is fixedly connected to the left top of the double-path front stretching unit 3, the swing roller assembly three 32 is fixedly connected to the middle of the top of the double-path front stretching unit 3, the tension assembly three 33 is fixedly connected to the right side of the double-path front stretching unit 3, the traction assembly two 34 is fixedly connected to the left bottom of the double-path front stretching unit 3, the swing roller assembly four 35 is fixedly connected to the middle of the double-path front stretching unit 3, the tension assembly four 36 is fixedly connected to the right side of the double-path front stretching unit 3 and is located below the tension assembly three 33.

[0033] The two pole pieces enter the traction assembly one 31, the swing roller assembly three 32, the tension assembly three 33, the traction assembly two 34, the swing roller assembly four 35 and the tension assembly four 36 respectively, the traction assembly one 31 and the traction assembly two 34 isolate the tension of the two pole pieces in the front section, the swing roller assembly three 32 and the swing roller assembly four 35 output tension to the two pole pieces, the tension assembly three 33 and the tension assembly four 36 form a feedback of the size of the tension of the two pole pieces, control the tension closed loop and speed synchronization of the two pole pieces from the double-path front stretching unit 3 to the rolling unit 4, and independently synchronize the stretching of the blank foil area of the two pole pieces, ensure the extension consistency of the pole piece material area and the blank foil area, and prevent the pole piece from wrinkling and breaking.

[0034] The rolling unit 4 is composed of a double-section independent over-roller assembly four 41, a hydraulic oil cylinder 42 and a double-section independent over-roller assembly five 43.

[0035] The double-section independent over-roller assembly four 41 is fixedly connected to the left bottom of the rolling unit 4, the hydraulic oil cylinder 42 is fixedly connected to the middle of the bottom of the rolling unit 4, and the double-section independent over-roller assembly five 43 is fixedly connected to the right bottom of the rolling unit 4.

[0036] The two pole pieces enter the rolling unit 4 at the double-section independent over-roller assembly four 41, the rolling unit 4 provides stable rolling force to the two pole pieces by the hydraulic oil cylinder 42 for compaction, and the compacted two pole pieces enter the double-path rear stretching unit 5 according to the predetermined piece path at the double-section independent over-roller assembly five 43.

[0037] The double-path rear stretching unit 5 is composed of a tension assembly five 51, a swing roller assembly five 52, a traction assembly three 53, a tension assembly six 54, a swing roller assembly six 55 and a traction assembly four 56.

[0038] The tension assembly five 51 is fixedly connected to the left top of the double-path rear stretching unit 5, the swing roller assembly five 52 is fixedly connected to the top of the double-path rear stretching unit 5, the traction assembly three 53 is fixedly connected to the right side of the double-path rear stretching unit 5, the tension assembly six 54 is fixedly connected to the left side of the double-path rear stretching unit 5 and is located below the tension assembly five 51, the swing roller assembly six 55 is arranged in the middle of the double-path rear stretching unit 5, and the traction assembly four 56 is arranged in the right bottom of the double-path rear stretching unit 5.

[0039] Two polar pieces respectively enter tension assembly five 51, swing roller assembly five 52, traction assembly three 53, tension assembly six 54, swing roller assembly six 55 and traction assembly four 56, the roller pressing unit 4 isolates the tension of the two polar pieces in the front section, the traction assembly three 53 and the traction assembly four 56 isolate the influence of the tension of the two polar pieces on the thickness measuring unit 6 and the first double-path winding unit 7, the swing roller assembly five 52 and the swing roller assembly six 55 output the tension of the two polar pieces, the tension assembly five 51 and the tension assembly six 54 feedback the size of the tension of the two polar pieces, control the tension closed loop and speed synchronization of the two polar pieces from the roller pressing unit 4 to the double-path front stretching unit 3, and independently synchronize the stretching of the polar piece again, ensure that the polar piece material area and the blank foil area are consistent, and prevent the polar piece from wrinkling and breaking.

[0040] The first double-path winding unit 7 is composed of dust and iron removal assembly three 71, belt connecting platform 72, double-section independent roller assembly seven 73, process deviation correction assembly one 74, tension assembly seven 75, air expansion shaft three 76, process deviation correction assembly two 77, tension assembly eight 78 and air expansion shaft four 79.

[0041] The dust and iron removal assembly three 71 is fixedly connected to the left side in the first double-path winding unit 7, the belt connecting platform 72 and the double-section independent roller assembly seven 73 are arranged on the top left side in the first double-path winding unit 7, the process deviation correction assembly one 74 is fixedly connected to the top in the first double-path winding unit 7, the tension assembly seven 75 is fixedly connected to the inside of the first double-path winding unit 7 and is located below the right side of the process deviation correction assembly one 74, the air expansion shaft three 76 is fixedly connected to the right top in the first double-path winding unit 7, the process deviation correction assembly two 77 is fixedly connected to the inside of the first double-path winding unit 7 and is located below the right side of the double-section independent roller assembly seven 73, the tension assembly eight 78 is fixedly connected to the inside of the first double-path winding unit 7 and is located below the tension assembly seven 75, and the air expansion shaft four 79 is fixedly connected to the right bottom in the first double-path winding unit 7.

[0042] Two polar pieces pass through the deviation correction sensor one 21, the belt connecting platform assembly one 22 and the double-section independent roller assembly one 23 to enter the swing roller assembly one 24, the tension assembly one 25, the swing roller assembly two 26 and the tension assembly two 27 according to the predetermined piece path, the swing roller assembly one 24 and the swing roller assembly two 26 output the tension of the two polar pieces, the tension assembly one 25 and the tension assembly two 27 feedback the size of the tension of the two polar pieces, control the tension closed loop and speed synchronization of the two polar pieces from the double-path unwinding unit 1 to the double-path buffer unit 2, the two polar pieces are combined at the double-section independent roller assembly two 28, enter the dust and iron removal assembly one 29 to clean themselves, and then enter the double-path front stretching unit 3 according to the predetermined piece path at the double-section independent roller assembly three 291.

[0043] Embodiment two, please refer to Figures 1-11On the basis of embodiment one, the application provides technical solutions: further comprising a second double-path winding unit 8, the second double-path winding unit 8 is composed of dust and iron removal assembly two 81, belt receiving platform assembly two 82, tension detection assembly one 83, tension detection assembly two 84, deviation correction sensor two 85, deviation correction sensor three 86, single whole deviation correction assembly one 87 and single whole deviation correction assembly two 88.

[0044] The double-path unwinding unit 1 is mirrored as a whole, and dust and iron removal assembly two 81, belt receiving platform assembly two 82, tension detection assembly one 83, tension detection assembly two 84, deviation correction sensor two 85, deviation correction sensor three 86, and single whole deviation correction assembly one 87 and single whole deviation correction assembly two 88 are added instead of the original process deviation correction assembly one 74 and process deviation correction assembly two 77 to form a new second double-path winding unit 8, which replaces the original first double-path winding unit 7 to form a new double-unwinding double-winding roller press.

[0045] The air expansion shaft three 76 and the air expansion shaft four 79 in the first double-path winding unit 7 are replaced by the slip shaft assembly one 91 and the slip shaft assembly two 92, and the slitting assembly 93 is added after the process deviation correction assembly one 74 and the process deviation correction assembly two 77 to form a new four-path winding unit 9, which replaces the original first double-path winding unit 7 to form a new double-unwinding four-winding roller and slitting integrated machine.

[0046] Further comprising a four-path winding unit 9, the four-path winding unit 9 is composed of the slip shaft assembly one 91, the slip shaft assembly two 92 and the slitting assembly 93.

[0047] The double-path unwinding unit 1 mainly functions to complete the synchronous independent unwinding of two rolls of pole pieces, provide stable unwinding tension, and perform single whole deviation correction on the two rolls of pole pieces to avoid mutual friction and overlap of the pole pieces during the belt running process.

[0048] The double-path buffer unit 2 is after the double-path unwinding unit 1, and mainly functions to perform single tension closed-loop and speed synchronization control on the two pole pieces, and clean the pole pieces through multiple dust and iron removal assemblies.

[0049] The double-path front stretching unit 3 is after the double-path buffer unit 2, and the double-path rear stretching unit 5 is after the roller pressing unit 4, which mainly functions to independently and synchronously stretch the white space and foil area of the two pole pieces to ensure that the pole piece material area and the white space and foil area are consistent in extension, and prevent the pole pieces from wrinkling and breaking.

[0050] The roller pressing unit 4 is after the double-path front stretching unit 3, and mainly functions to compact the two pole pieces through the rolling force between the upper and lower rollers to obtain pole pieces with a process thickness.

[0051] The thickness measuring unit 6 is after the double-path rear stretching unit 5, and mainly functions to monitor the thickness of the two pole pieces after roller pressing.

[0052] The first double-path winding unit 7 and the second double-path winding unit 8 are behind the thickness measuring unit 6, and mainly function to clean the two pole pieces after being rolled by multiple dust and iron removing components, and guide the two pole pieces to the correct position for separate and neat winding.

[0053] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0054] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will still be able to modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A double-discharge, double-receive roller press for lithium battery electrodes, characterized in that: It includes a dual-path unwinding unit (1), and on the right side of the dual-path unwinding unit (1) are arranged a dual-path buffer unit (2), a dual-path front stretching unit (3), a roller pressing unit (4), a dual-path rear stretching unit (5), a thickness measuring unit (6), and a first dual-path winding unit (7). Inside the dual-path unwinding unit (1), from top to bottom, are arranged an air shaft one (11), a correction actuator one (13), an air shaft two (12), and a correction actuator two (14). At the bottom of the thickness measuring unit (6), there is a dual-segment independent roller assembly six (61).

2. The double-discharge and double-receive roller press for lithium battery electrodes according to claim 1, characterized in that: The dual-path buffer unit (2) consists of a first correction sensor (21), a first belt receiving platform assembly (22), a first dual-section independent roller assembly (23), a first swing roller assembly (24), a first tension assembly (25), a second swing roller assembly (26), a second tension assembly (27), a second dual-section independent roller assembly (28), a first dust removal and iron removal assembly (29), and a third dual-section independent roller assembly (291). The first correction sensor (21) is fixedly connected to the left side inside the dual-path buffer unit (2). The first belt receiving platform assembly (22) is fixedly connected to the top left side inside the dual-path buffer unit (2). The first dual-section independent roller assembly is located on the right side of the first belt receiving platform assembly (22). The first swing roller assembly (24) is located at the top inside the dual-path buffer unit (2). The first tension assembly (25) is fixedly connected to the lower right side of the first swing roller assembly (24). The second swing roller assembly (26) is located on the left side inside the dual-path buffer unit (2). The second tension assembly (27) is fixedly connected to the middle inside the dual-path buffer unit (2). The second dual-section independent roller assembly (28) is fixedly connected to the dual-path buffer unit (2) and located to the lower right of the second tension assembly (27). The first dust removal and iron removal assembly (29) is fixedly connected to the right side inside the dual-path buffer unit (2). The third dual-section independent roller assembly (291) is fixedly connected to the top right side inside the dual-path buffer unit (2). After the two rolls of electrode sheets are fed out synchronously and independently through the air expansion shaft one (11) and air expansion shaft two (12) of the dual-path unwinding unit (1), the two rolls of electrode sheets enter the dual-path buffer unit (2). Through the correction sensor one (21), the position of the two electrode sheets is fed back to the correction actuator one (13) and correction actuator two (14) of the dual-path unwinding unit (1) respectively, so as to perform individual overall correction on the two rolls of electrode sheets, ensure the accuracy of the required position of the two electrode sheets, and prevent the electrode sheets from moving laterally, wrinkling, or overlapping on the roller surface.

3. The double-discharge and double-receive roller press for lithium battery electrodes according to claim 2, characterized in that: The dual-path front tensioning unit (3) consists of traction component one (31), swing roller component three (32), tension component three (33), traction component two (34), swing roller component four (35) and tension component four (36); The first traction component (31) is fixedly connected to the top left side of the double-path front tension unit (3), the third swing roller component (32) is fixedly connected to the middle top of the double-path front tension unit (3), the third tension component (33) is fixedly connected to the right side of the double-path front tension unit (3), the second traction component (34) is fixedly connected to the bottom left side of the double-path front tension unit (3), the fourth swing roller component (35) is fixedly connected to the middle of the double-path front tension unit (3), and the fourth tension component (36) is fixedly connected to the right side of the double-path front tension unit (3) and located below the third tension component (33). Two rolls of electrode sheets enter the traction assembly 1 (31), the swing roller assembly 3 (32), the tension assembly 3 (33), the traction assembly 2 (34), the swing roller assembly 4 (35), and the tension assembly 4 (36), respectively. The traction assembly 1 (31) and the traction assembly 2 (34) isolate the tension of the two electrode sheets in the front section. The two electrode sheets are output tension through the swing roller assembly 3 (32) and the swing roller assembly 4 (35). The tension assembly 3 (33) and the tension assembly 4 (36) form a feedback mechanism to control the tension of the two electrode sheets from the dual-path front stretching unit (3) to the rolling unit (4) and synchronize the speed. The blank foil area of ​​the two electrode sheets is stretched independently and synchronously to ensure that the electrode sheet material area and the blank foil area are extended in the same way and to prevent the electrode sheet from wrinkling and breaking.

4. The double-discharge and double-receive roller press for lithium battery electrodes according to claim 3, characterized in that: The roller pressing unit (4) consists of a double-section independent roller passing assembly four (41), a hydraulic cylinder (42), and a double-section independent roller passing assembly five (43); The double-section independent roller assembly four (41) is fixedly connected to the bottom left side of the roller pressing unit (4), the hydraulic cylinder (42) is fixedly connected to the middle bottom of the roller pressing unit (4), and the double-section independent roller assembly five (43) is fixedly connected to the bottom right side of the roller pressing unit (4). The two electrodes merge at the double-section independent roll passing assembly four (41) and enter the roll pressing unit (4). The roll pressing unit (4) uses a hydraulic cylinder (42) to provide a stable rolling force to compact the two electrodes. After compaction, the two electrodes enter the double-path post-stretching unit (5) at the double-section independent roll passing assembly five (43) according to the predetermined paths.

5. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 4, characterized in that: The dual-path rear tensioning unit (5) consists of tension assembly five (51), swing roller assembly five (52), traction assembly three (53), tension assembly six (54), swing roller assembly six (55) and traction assembly four (56); The tension assembly five (51) is fixedly connected to the top left side of the double-path rear tension unit (5), the swing roller assembly five (52) is fixedly connected to the top of the double-path rear tension unit (5), the traction assembly three (53) is fixedly connected to the right side of the double-path rear tension unit (5), the tension assembly six (54) is fixedly connected to the left side of the double-path rear tension unit (5) and located below the tension assembly five (51), the swing roller assembly six (55) is located in the middle of the double-path rear tension unit (5), and the traction assembly four (56) is located at the bottom right side of the double-path rear tension unit (5). Two rolls of electrode sheets enter tension assembly five (51), swing roller assembly five (52), traction assembly three (53), tension assembly six (54), swing roller assembly six (55) and traction assembly four (56) respectively. Roll pressing unit (4) isolates the tension of the two electrode sheets in the front section. Traction assembly three (53) and traction assembly four (56) isolate the influence of the tension of the two electrode sheets on the tension of the thickness measuring unit (6) and the first double-path winding unit (7). The two electrode sheets are output tension through swing roller assembly five (52) and swing roller assembly six (55). Tension assembly five (51) and tension assembly six (54) provide feedback on the tension of the two electrode sheets, control the tension closed loop and speed synchronization of the two electrode sheets from the roll pressing unit (4) to the double-path front stretching unit (3), and perform independent synchronous stretching again on the blank foil area of ​​the two electrode sheets to ensure that the electrode sheet material area and the blank foil area are extended in a consistent manner, and prevent the electrode sheet from wrinkling and breaking.

6. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 5, characterized in that: The first dual-path winding unit (7) consists of a dust removal and iron removal component three (71), a tape receiving platform (72), a dual-section independent roller passing component seven (73), a process correction component one (74), a tension component seven (75), an air shaft three (76), a process correction component two (77), a tension component eight (78), and an air shaft four (79); The dust removal and iron removal component three (71) is fixedly connected to the left side of the first dual-path winding unit (7). The tape receiving platform (72) and the dual-section independent roller passing component seven (73) are both located on the top left side of the first dual-path winding unit (7). The process correction component one (74) is fixedly connected to the top of the first dual-path winding unit (7). The tension component seven (75) is fixedly connected inside the first dual-path winding unit (7) and located to the lower right of the process correction component one (74). The air shaft three (76) is fixedly connected to the top right side of the first dual-path winding unit (7). The process correction component two (77) is fixedly connected to the inside of the first dual-path winding unit (7) and is located below the right side of the dual-section independent roller assembly seven (73). The tension component eight (78) is fixedly connected to the inside of the first dual-path winding unit (7) and is located below the tension component seven (75). The air shaft four (79) is fixedly connected to the bottom right side of the first dual-path winding unit (7).

7. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 6, characterized in that: It also includes a second dual-path winding unit (8), which is composed of a dust removal and iron removal component 2 (81), a tape connection platform component 2 (82), a tension detection component 1 (83), a tension detection component 2 (84), a correction sensor 2 (85), a correction sensor 3 (86), a separate overall correction component 1 (87), and a separate overall correction component 2 (88).

8. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 7, characterized in that: It also includes a four-way winding unit (9), which is composed of a slip shaft assembly one (91), a slip shaft assembly two (92) and a slitting assembly (93).

9. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 8, characterized in that: Two rolls of electrode sheets are fed into the swing roller assembly 1 (24), tension assembly 1 (25), swing roller assembly 2 (26), and tension assembly 2 (27) respectively through the correction sensor 1 (21), the tape connection platform assembly 1 (22), and the dual-section independent overroll assembly 1 (23) according to the predetermined sheet path. The swing roller assembly 1 (24) and swing roller assembly 2 (26) output tension to the two electrode sheets. The tension assembly 1 (25) and tension assembly 2 (27) provide feedback on the tension of the two electrode sheets, and control the tension closed loop and speed synchronization of the two electrode sheets from the dual-path unwinding unit (1) to the dual-path buffer unit (2). After the two electrode sheets merge into the dust removal and iron removal assembly 1 (29) at the dual-section independent overroll assembly 2 (28) to clean themselves, the two electrode sheets enter the dual-path front stretching unit (3) respectively according to the predetermined sheet path at the dual-path independent overroll assembly 3 (291).

10. A double-discharge and double-receive roller press for lithium battery electrodes according to claim 9, characterized in that: After the two-electrode sheets enter the first dual-path winding unit (7) and are cleaned by the dust removal and iron removal component three (71), they arrive at the tape receiving platform (72) and the dual-stage independent roller passing component seven (73). In the dual-stage independent roller passing component seven (73), they enter the process correction component one (74), tension component seven (75), air shaft three (76), process correction component two (77), tension component eight (78) and air shaft four (79) according to the predetermined sheet path. (74) and process correction component two (77) independently correct and guide the two electrodes to the correct position to ensure the end face alignment during the winding process of the two electrodes. Air shaft three (76) and air shaft four (79) output tension to the two electrodes. Tension component seven (75) and tension component eight (78) provide feedback on the tension of the two electrodes, control the tension closed loop and speed synchronization of the two electrodes from the thickness measurement unit (6) to the first dual winding unit (7), and complete the neat winding of the two electrodes.

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