CN112670555B

CN112670555B - Thermal compounding equipment

Info

Publication number: CN112670555B
Application number: CN202011586014.8A
Authority: CN
Inventors: 许宽荣; 陈玉振; 吴鑫
Original assignee: Shenzhen Greensheng Technology Co ltd
Current assignee: SHENZHEN GREENSUN TECHNOLOGY CO LTD
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2024-02-20
Anticipated expiration: 2040-12-28
Also published as: CN112670555A

Abstract

The utility model provides a thermal compounding device, which is used for an automatic assembly line for processing lithium battery pole pieces, and comprises the following components: a base frame; the deviation correcting manipulator is arranged on the base frame, and comprises a first flexible PET conveying line, a second flexible PET conveying line, a pretreatment mechanism and a roller pair compound machine; wherein, first flexible PET transfer chain and second flexible PET transfer chain do not get into the roller pair compounding machine. Based on the technical scheme provided by the utility model, the flexible PET conveyor belt is separated from the diaphragm before entering the double-roller compound machine, and the phenomenon of bonding between the diaphragm and the flexible PET conveyor belt caused by the rolling process can be avoided without the rolling process.

Description

Thermal compounding equipment

Technical Field

The utility model relates to the technical field of industrial automation control, in particular to thermal compounding equipment in an automatic processing line of a lithium battery.

Background

Lithium batteries are widely used for industrial and consumer goods represented by mobile phones, electric vehicles, unmanned aerial vehicles, etc., due to their excellent energy storage properties. In the structure of a lithium battery, a separator is one of key inner layer components, and the separator has the main functions of separating the positive electrode from the negative electrode of the battery, preventing the contact of the two electrodes from short circuit, and also has the function of passing electrolyte ions. The separator material is non-conductive, and its physicochemical properties have a great influence on the performance of the battery. The type of battery is different, and the separator used is also different. In the lithium battery system, since the electrolyte is an organic solvent system, a separator material resistant to an organic solvent is required, and a polyolefin porous film having a high strength and a thin film is generally used. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, directly influences the capacity, circulation, safety performance and other characteristics of the battery, and the diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery.

In the patent application of the utility model with the application number of CN201820361810.3, an automatic assembly line prototype for processing lithium batteries and diaphragms is provided, wherein a lamination table circulation line comprises a plurality of lamination tables, and when the lamination table circulation line rotates, the lamination tables circularly rotate along a fixed direction on the lamination table circulation line; the rotary manipulator is arranged on the lamination table circulation line, and a bottom layer diaphragm, a first pole piece, a middle layer diaphragm and a second pole piece are sequentially placed on the lamination table through rotary operation.

The assembly line of lithium cell processing in above-mentioned patent can satisfy the general requirement to lithium cell pole piece processing, but how to design the production line in the automatic course of working of lithium cell to make the production line adapt to different processing requirements, improve the processing yield of electric core and diaphragm in the lithium cell, reduce cost, with the production of more high-efficient, safety still be the subject that needs the industry to study.

Disclosure of Invention

Based on the research on the technical problems, the utility model provides a thermal compounding device for an automatic assembly line for processing lithium battery pole pieces, which comprises: a base frame; the device comprises a deviation correcting manipulator arranged on a base frame, an upper diaphragm unreeling, a first flexible PET conveying line, a lower diaphragm unreeling, a second flexible PET conveying line, a pretreatment mechanism and a pair roller compound machine; the deviation correcting manipulator is used for correcting the pole piece to a standard posture and placing the pole piece on the diaphragm which is unreeled and conveyed by the lower diaphragm at a preset interval; the upper diaphragm is unreeled and used for conveying the diaphragm to cover the upper part of the pole piece placed by the deviation correcting manipulator; the first flexible PET conveying line and the first flexible PET conveying line are used for providing a flexible PET conveying belt; the pretreatment mechanism is used for preheating the diaphragm and the pole piece which are input into the pretreatment mechanism; the pair roller compound machine is used for rolling the diaphragm and the pole piece which are input into the pair roller compound machine; wherein, first flexible PET transfer chain and second flexible PET transfer chain do not get into the roller pair compounding machine.

The utility model has the following beneficial effects: based on the technical scheme provided by the utility model, the flexible PET conveyor belt is separated from the diaphragm before entering the double-roller compounding machine, and the phenomenon of bonding between the diaphragm and the flexible PET conveyor belt caused by a rolling process can be avoided without rolling.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a lithium battery processing flow water line provided by an embodiment of the utility model;

fig. 2 is a structural diagram of a lithium battery processing line provided by an embodiment of the utility model;

fig. 3 is a front view of a lithium battery processing line structure provided by an embodiment of the utility model;

fig. 4 is a view of a structural part of a lithium battery processing line according to an embodiment of the present utility model;

fig. 5 is a view of a structural part of a lithium battery processing line according to an embodiment of the present utility model;

fig. 6 is a view of a structural part of a lithium battery processing line according to an embodiment of the present utility model;

fig. 7 is a structural view of a roll squeezer for lithium battery processing according to an embodiment of the utility model;

fig. 8 is a front view of a roller press structure for lithium battery processing according to an embodiment of the present utility model;

fig. 9 is an exploded view of a roll squeezer for lithium battery processing according to an embodiment of the utility model;

fig. 10 is a view showing a structural part of a roll squeezer for processing a lithium battery according to the embodiment of the utility model;

FIG. 11 is a view showing a structural part of a roll squeezer for processing lithium batteries according to the embodiment of the utility model;

FIG. 12 is a diagram of a fine tuning component according to an embodiment of the present utility model;

fig. 13 is a view showing a structural part of a roll squeezer for processing a lithium battery according to the embodiment of the utility model;

fig. 14 is a schematic structural diagram of a deviation correcting manipulator according to an embodiment of the present utility model;

FIG. 15 is a schematic structural diagram of a deviation correcting manipulator according to an embodiment of the present utility model;

fig. 16 is a schematic structural diagram of a deviation rectifying manipulator according to an embodiment of the present utility model.

Reference numerals in the present specification are explained as follows:

the laminating machine comprises a transfer line-1, a lamination table-2, a rotary manipulator-3, a rotary manipulator-4, a paste handling mechanism-5, a rotary manipulator-6, a rotary manipulator-7 and an adsorption plate-8;

the device comprises a correction manipulator-11, an upper diaphragm unreeling-12, an upper flexible PET conveying line-13, a lower diaphragm unreeling-14, a lower flexible PET conveying line-15, a pretreatment mechanism-16 and a roller-to-roller compounding mechanism-17;

the device comprises a cylinder-1701, an electromagnetic proportional valve-1702, an electromagnetic valve-1703, an adjusting bolt-1704, a weighing sensor-1705, a counterweight tension spring-1706, a servo motor-1707, a fine adjusting part-1708, a roll shaft pair-1709 and a dial indicator-1710.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Embodiment one:

as shown in fig. 1, there is shown an automated lamination line comprising: a lamination station flow line comprising a plurality of lamination stations 2, the lamination stations 2 cyclically rotating in a fixed direction on the lamination station flow line as the lamination station flow line rotates; the first rotary manipulator 6 is arranged on the lamination table circulation line and is used for placing the bottom-layer diaphragm on the lamination table through rotary operation; the second rotary manipulator 7 is arranged behind the first rotary manipulator 6 on the lamination station circulation line, and stacks the first pole piece on the bottom layer diaphragm through rotary operation; the third rotary manipulator 3 is arranged behind the second rotary manipulator 7 on the lamination station circulation line and stacks a middle-layer diaphragm on the first pole piece through rotary operation; and the fourth rotary manipulator 4 is arranged behind the third rotary manipulator 3 on the lamination station circulation line, and stacks the second pole piece on the middle-layer diaphragm through rotary operation. The lamination table circulation line is annular, and the number of the lamination tables 2 is set according to the length of the lamination table circulation line. The first pole piece is a positive pole piece, and the second pole piece is a negative pole piece; or the first pole piece is a negative pole piece, and the second pole piece is a positive pole piece.

The device also comprises a rubberizing conveyor, wherein the rubberizing conveyor conveys the stacked battery cells on the lamination table to rubberize. The rubberizing carrier 5 is provided with a rubberizing station, when the rubberizing station is occupied, the lamination station circulation line continues to rotate, and the first rotary manipulator 6, the second rotary manipulator 7, the third rotary manipulator 3 and the fourth rotary manipulator 4 stop rotating lamination actions. The first rotary manipulator 6, the second rotary manipulator 7, the third rotary manipulator 3 and the fourth rotary manipulator 4 all comprise CCD visual detectors, and whether the current lamination is aligned with the previous lamination is judged through the visual detectors.

The first rotary manipulator 6, the second rotary manipulator 7, the third rotary manipulator 3 and the fourth rotary manipulator 4 are further provided with lifting mechanisms for controlling lifting of the rotary manipulators.

Based on the technical scheme provided by the first embodiment, the lamination precision can be improved, the quality of the lithium battery can be effectively improved, meanwhile, the lamination efficiency can be improved in a high-speed circulation lamination mode, the system can have great redundancy due to the structure of the multi-lamination table, flexible expansion can be carried out, and the lamination efficiency is further improved.

Embodiment two:

in the production process, the pole piece processing line in the first embodiment is found to have some points to be improved. One of the technical problems is that the membrane and the flexible PET transport membrane for transporting the membrane can have bonding problems during the rolling process, and the following is specifically described:

in the processing process, the diaphragm and the pole piece are borne on the flexible PET conveying film, and are carried to each processing station along with the movement of the flexible PET conveying film. While the flexible PET carrier film is rolled with the separator and pole piece carried thereon as it passes through the rolling station, the flexible PET carrier film is rolled and heated with the separator and pole piece in the process after hot pressing together due to the contact of the flexible PET carrier film with the separator located therebelow, which can cause at least two problems.

On the one hand, the bonding phenomenon can exist after the flexible PET conveying film and the diaphragm are rolled, and the bonding of the diaphragm and the flexible PET conveying film leads to that the rolled pole piece and diaphragm are difficult to fall off from the flexible PET conveying film, and the diaphragm is possibly damaged in the subsequent transfer process, so that the product yield is reduced, and the pole piece manufacturing process is influenced.

On the other hand, the bonding phenomenon can lead to the fact that the flexible PET conveying film can not be repeatedly used, so that the material cost is increased; and the condition of consuming manpower to inspect flexible PET has reduced production efficiency.

Therefore, according to the mode that the flexible PET conveying film, the pole piece and the diaphragm are rolled together in the first embodiment, the use cost is high, the manufacturing cost of the lithium battery is improved, and the mass production benefit is not achieved.

As shown in fig. 2 and 3, an improved automated processing line for lithium batteries is provided in this embodiment, which includes:

and the deviation rectifying manipulator 11 is used for placing the pole pieces on the diaphragm according to the designated gesture and the designated distance. The device comprises a sucker plate, wherein the sucker plate is used for sucking a fed pole piece, the gesture of the pole piece is obtained through shooting by a CCD camera, the gesture of the pole piece is compared with a preset gesture, and then the manipulator is rotated or translated according to the comparison of the front gesture and the preset gesture, so that the pole piece is rotated to the preset gesture. Through repeatedly translating the manipulator, the pole pieces can be placed on the diaphragm according to preset intervals, and the preset intervals can be equal intervals or unequal intervals. Fig. 3 is a front view of the automated lithium battery processing line shown in fig. 2, as shown in fig. 3, a pole piece with the posture corrected by the deviation correcting manipulator 11 is carried by a diaphragm output by the lower diaphragm unreeling 14 and moves to a pre-processing station, and in the moving process, the diaphragm output by the upper diaphragm unreeling 12 covers over the pole piece, so as to form a three-layer structure of 'diaphragm', 'pole piece' and 'diaphragm'. The pretreatment mechanism 16 is an elongated station having a preheating function in which the separator and the pole piece are preheated. While at this elongated station entrance, i.e. the entrance of the pretreatment mechanism 16, an upper (first) flexible PET conveyor line 13 and a lower (second) flexible PET conveyor line 15 are fed into the pretreatment mechanism 16 together with the membrane from above and below, respectively. The diaphragm and pole piece are preheated during movement of the preprocessing station and gradually move toward the exit of the preprocessing mechanism 16. At the outlet of the pretreatment mechanism 16, the upper (first) flexible PET transfer line 13 and the lower (second) flexible PET transfer line 15 are moved in the upward 'a' direction and the downward 'c' direction, respectively, and only the separator is moved forward and is conveyed into the inside of the counter roller complex mechanism 17. After passing through the twin roll compounding machine 17, the separator subjected to the rolling process can be conveyed by a flexible PET conveyor line 18 that is conveyed in one direction.

According to the scheme provided by the embodiment, the flexible PET conveyor belt is separated from the diaphragm before entering the double-roller compound machine 17, and the phenomenon of bonding between the diaphragm and the flexible PET conveyor belt caused by the rolling process can be avoided without the rolling process.

Embodiment III:

in the second embodiment, the structure shown in fig. 3 adopts the idea of separating the flexible PET conveyor belt from the separator before entering the roll-in process, so as to avoid the flexible PET being conveyed inside the roller complex 17. The second embodiment will be further described with reference to the present embodiment.

As shown in fig. 4, which is a partial view of fig. 3, in fig. 4, the upper (first) flexible PET conveyor line 13 is entirely located above the elongated pretreatment mechanism 16, which may be divided into a first section 1301, a second section 1302, a third section 1303, a fourth section 1304, a fifth section 1305, and a sixth section 1306 of the upper (first) flexible PET conveyor line 13. These six sections constitute the upper (first) flexible PET conveyor line 13 of the closed cycle. The driving mechanism is positioned between the second section 1302 and the third section 1303 and provides circulating power for the upper (first) flexible PET conveying line 13; a tension providing device is provided between the first section 1301 and the second section 1302 for providing tension to the conveyor line, which is a fifth section 1305 inside the pretreatment mechanism 16 after passing through the sixth section 1306. The direction of the PET conveyor belt is changed through the guide posts between the sections, and six sections form a closed circulation section.

As shown in fig. 5, which is a partial view of fig. 3, in fig. 5, the lower (second) flexible PET conveyor line 15 is entirely located above the elongated pretreatment mechanism 16, which may be divided into a first section 1501, a second section 1502, a third section 1503, a fourth section 1504, a fifth section 1505, and a sixth section 1506 of the lower (second) flexible PET conveyor line 15. These six sections constitute the lower (second) flexible PET conveyor line 15 of the closed cycle. The driving mechanism is positioned between the first section 1501 and the second section 1502 and provides circulating power for the upper flexible PET conveyor line 15; a tension providing device is provided between the first section 1501 and the sixth section 1506 for providing tension to the conveyor line, which is a fourth section 1504 within the pretreatment mechanism 16 after passing through the fifth section 1505. The direction of the PET conveyor belt is changed through the guide posts between the sections, and six sections form a closed circulation section.

In fig. 5, the upper (first) flexible PET conveyor line 13, the pole piece and the diaphragm processed by the deviation correcting manipulator 11, and the lower (second) flexible PET conveyor line 15 enter the pretreatment mechanism 16 in three directions of 'a' b 'c', respectively, and are conveyed in the pretreatment structure in the direction of 'b'.

As shown in fig. 6, which is a partial view of fig. 3, in fig. 6, the upper (first) flexible PET conveyor line 13, the pretreated pole piece and membrane, and the lower (second) flexible PET conveyor line 15, which pass through the pretreatment mechanism 16, are respectively moved in three directions 'a″b″ c'. Wherein the upper (first) flexible PET conveyor line 13 and the lower (second) flexible PET conveyor line 15 restart a new cycle, while the pretreated pole pieces and separator enter the twin roll compounding machine 17.

In the second and third embodiments, the line is arranged on the line base, the deviation correcting manipulator 11, the upper diaphragm unreels 12, the upper (first) flexible PET conveyor line 13, the lower diaphragm unreels 14, the lower (second) flexible PET conveyor line 15, the pretreatment mechanism 16, the counter roller compounding mechanism 17, and the like are fixed on the base by the fixing members provided on the base, and since the axis of the fixing members is substantially parallel to the ground and perpendicular to the line base (the direction perpendicular to the paper surface in the drawing), it is ensured that the upper (first) flexible PET conveyor line 13 and the lower (second) flexible PET conveyor line 15 are parallel to the ground in the pretreatment step and the like.

According to the scheme provided by the embodiment, the flexible PET conveyor belt is separated from the diaphragm before entering the double-roller compound machine 17, and the phenomenon of bonding between the diaphragm and the flexible PET conveyor belt caused by the rolling process can be avoided without the rolling process. The PET conveyer belt can recycle repeatedly, has greatly practiced thrift the cost, and need not constantly monitor whether the PET conveyer belt appears the bonding phenomenon, greatly reduced industrial control cost.

Embodiment four:

according to the technical solutions described in the second and third embodiments, the pole piece with the lower diaphragm and the upper diaphragm, which completes the posture correction at the deviation correcting manipulator 11, moves toward the pretreatment mechanism 16. The pretreatment mechanism 16 is an elongated station having a preheating function in which the separator and the pole piece are preheated. While at this elongated station entrance, i.e. the entrance of the pretreatment mechanism 16, an upper (first) flexible PET conveyor line 13 and a lower (second) flexible PET conveyor line 15 are fed into the pretreatment mechanism 16 together with the membrane from above and below, respectively. The diaphragm and pole piece are preheated during movement of the preprocessing station and gradually move toward the exit of the preprocessing mechanism 16. At the outlet of the pretreatment mechanism 16, the upper (first) flexible PET conveyor line 13 and the lower (second) flexible PET conveyor line 15 are respectively moved in the up-down direction, and only the separator is moved forward and conveyed into the inside of the counter roller compounding mechanism 17. After passing through the twin roll compounding machine 17, the separator subjected to the rolling process is conveyed by a flexible PET conveyor line 18 that is conveyed unidirectionally.

When the rolling composite scheme in the embodiment is designed, the electrode and the diaphragm can be processed in an up-and-down plate pressing mode, and the plate pressing mode is used for pressing workpieces on the assembly line piece by piece in a mode that a servo motor drives the up-and-down pressing plate to open and close. However, the pressurizing mode has the possibility of asymmetric pressurizing of the upper plate and the lower plate, has extremely high requirement on servo control precision, and is easy to cause the phenomenon of sticking the diaphragm to the pressing plate in the processing process. And each machined part is opened and closed at least once, the machining speed and precision are low, and continuous compounding can not be carried out.

The structure and control method of the twin-roll compound machine 17 will be described in detail with reference to the accompanying drawings. As shown in fig. 7 to 11, the twin-roll compound machine 17 includes: cylinder 1701, electromagnetic proportional valve 1702, electromagnetic valve 1703, adjusting bolt 1704, load cell 1705, weight tension spring 1706, servo motor 1707, fine adjustment component 1708, roller pair 1709, dial indicator 1710.

Wherein the roller pair 1709 includes oppositely disposed first and second rollers 17091, 17092. The first roller and the second roller are substantially cylindrical. The directions of the two buses (axes) are parallel. The first (upper) roller 17091 rotates counterclockwise and the second (lower) roller 17092 rotates clockwise under the control of the servo motor. Of course the bottom surface of the roll shafts may be of other shapes, such as conical or other shapes, but the roll surfaces of the first roll shaft and the second roll shaft are cylindrical surfaces.

In one example, the first roller and the second roller are disposed on a base frame of the twin-roller complex machine. The first roller shaft 17091 is connected to the first fixing portion 170912 of the base frame through a first connecting portion 170911 provided on a bottom surface of the first roller shaft; the second roller shaft 17092 is connected to the second fixing portion 170922 of the base frame through a second connecting portion 170921 provided on a bottom surface of the second roller shaft.

As shown in fig. 10 to 11, the connection portion may be an end shaft of an end portion of the roll shaft, and the fixing portion may be a fixing member having a central hole, and the end portion of the roll shaft is fixed to a side surface of the base frame through the fixing member (bearing base) after passing through the central hole of the fixing member. Further, the connecting piece (the end part of the roll shaft) is sleeved with the bearing and then fixed in the round hole of the fixing piece (the bearing base), and the roll shaft can rotate around the self shaft, so that the round hole does not limit the freedom degree of the roll shaft rotating around the self shaft.

As shown in fig. 10-11, the fixing portion may be directly fixed to the base frame, and the position of the roller shaft with respect to the base frame is fixed. The fixing part can also move relative to the base frame. According to fig. 9-11, the first roll shaft slides up and down, so that the distance between the first roll shaft and the second roll shaft is changed, and after the first roll shaft is tangential to the second roll shaft, if downward pressure is continuously applied to the first roll shaft, pressure is generated between the roll shafts, and the pressure can be measured by symmetrically arranging weighing sensors on two sides. When the pressure on the two sides is inconsistent, the fact that the stress on one side of the two roll shafts is larger is indicated, and the stress on the two sides of the roll shafts is required to be balanced by adjusting the tension springs.

Referring to fig. 5-6, the roll-to-roll heat compounding mechanism drives the diaphragm and the pole piece to move forward along the track ('b' direction) through the rotation of the counter roll until the diaphragm and the pole piece are bonded into a whole after passing through the counter roll.

The limiting device manually rotates the screw rod to drive the sliding block to lift up the roller bearing seat along the inclined plane, so that the gap and the compactness of the roller are adjusted, and the adjustment precision is 0.001mm.

Because the weighing sensors are symmetrically arranged on two sides, when the pressure values on two sides are too large in phase difference, the machine can stop for alarming to ensure the compound effect when the thermal compound quality is possibly influenced. The weighing device is provided with a weighing measurement display device, and forms closed-loop accurate control together with the PLC and the electric proportional valve.

Referring to fig. 9-11, the upper pair of roller assemblies are provided with tension springs to allow a minimum pressure of 0kg against the rollers. The mechanism both sides are equipped with mechanical hard limit, and the reciprocates of roller can be limited by mechanical hard limit, prevents two pairs of roller contact damage, and all moving parts all have the protection casing in addition.

Fifth embodiment:

the present embodiment will be further described with respect to structures in the second and third embodiments, which is a thermal compounding device for an automated assembly line for processing a lithium battery pole piece, and includes: a base frame; the device comprises a deviation correcting manipulator 11 arranged on the base frame, an upper diaphragm unreeling 12, a first flexible PET conveying line 13, a lower diaphragm unreeling 14, a second flexible PET conveying line 15, a pretreatment mechanism 16 and a pair roller compound machine 17; the deviation correcting manipulator 11 is used for correcting the pole piece to a standard posture and placing the pole piece on the diaphragm conveyed by the lower diaphragm unreeling 14 at preset intervals; the upper diaphragm unreels 12, is used for conveying the diaphragm to cover the upper part of the pole piece placed by the deviation correcting manipulator; the first flexible PET conveyor line 13 and the first flexible PET conveyor line 15 are used for providing a flexible PET conveyor belt; the pretreatment mechanism 16 is used for preheating the diaphragm and the pole piece which are input into the pretreatment mechanism; the pair roller compound machine 17 is used for rolling the diaphragm and the pole piece which are input into the pair roller compound machine; wherein the first and second flexible PET conveyor lines 13, 15 do not enter the twin roller compounding machine 17.

In one example, after the separator delivered by the upper separator unwind 12 is overlaid over the pole piece, the separator and pole piece form: the three-layer structure comprises a lower-layer diaphragm, a middle-layer pole piece and an upper-layer diaphragm; and the pole pieces are arranged according to the corrected gesture of the correction manipulator and the preset distance.

In one example, the first flexible PET conveyor line 13 and the second flexible PET conveyor line 15 carry the separator and pole pieces output by the deviation correcting manipulator 11 for preheating in the pretreatment mechanism 16.

In one example, the first flexible PET conveyor line 13 and the second flexible PET conveyor line 15 are directed in the same direction as the separator and pole piece conveyance direction by a guide post due to the different directions of the separator and pole piece conveyance before entering the pretreatment mechanism 16.

In one example, the first and second flexible PET conveyor lines 13, 15 do not enter the pair roller compounding machine 17, comprising: the first flexible PET conveying line 13 and the second flexible PET conveying line 15 bear the diaphragm and the pole piece output by the deviation rectifying manipulator 11, and are separated from the diaphragm and the pole piece through guide posts after being preheated in the pretreatment mechanism 16.

In one example, the first and second flexible PET conveyor lines 13, 15 each constitute a closed loop endless conveyor belt.

In one example, the separator and pole piece are fed tangentially to the pair of roller compounding machine 17 along the roller axis in the pair of roller compounding machine 17.

In another aspect of the present embodiment, a processing method for an automated assembly line for processing a lithium battery pole piece is provided, including the steps of: correcting the pole piece to a standard posture by a correction manipulator, and placing the pole piece on a diaphragm output by the lower diaphragm unreeling 14 at a preset interval; then, the upper diaphragm unreeling 12 outputs the diaphragm to cover above the pole piece that the manipulator placed of rectifying; a pretreatment step, wherein the first PET conveying line 13 and the second PET conveying line 15 wrap the diaphragm and the pole piece above and below respectively and are input into a pretreatment mechanism 16 together for preheating; and a rolling step, namely inputting the separator and the pole piece subjected to the pretreatment step into a double-roller compound machine 17 for rolling, wherein the first PET conveying line 13 and the second PET conveying line 15 do not enter the roller press 17.

The technical scheme provided by the embodiment has the following beneficial effects: the flexible PET conveyor belt is separated from the diaphragm before entering the double-roller compound machine, and the phenomenon that the diaphragm and the flexible PET conveyor belt are bonded due to a rolling process can be avoided without rolling.

Example six:

the present embodiment will be described with respect to a rolling compound machine proposed in the fourth embodiment, which is used for an automated assembly line for processing lithium battery pole pieces, and includes: a base frame; a roller pair arranged on the base frame; the roll shaft pair comprises a first roll shaft and a second roll shaft, the axes of which are parallel to each other, and the roll surfaces of the first roll shaft and the second roll shaft are cylindrical surfaces; the first servo motor and the second servo motor are used for driving the first roll shaft and the second roll shaft to rotate around the roll shaft axis and driving the rolling surface to rotate; the second roll shaft is fixed with the base frame, and the first roll shaft is movably arranged on the base frame; and the cylinder is used for applying pressure to the first roll shaft so as to provide rolling pressure between the first roll shaft and the second roll shaft.

Referring to fig. 9 to 13, the first roller and the second roller are rotated by a servo, respectively, the second roller is rotatably fixed to the base frame through a bearing, and the first roller is rotatably fixed to the fixing portion through a bearing, and the fixing portion is movable with respect to the base frame, so that a distance between the first roller and the second roller is adjustable.

In one example, the device comprises at least two tension springs, and the tension springs are arranged between the base frame and the first roll shaft and are used for counteracting the dead weight of the first roll shaft. Referring to fig. 9 to 13, tension springs may be provided in pairs, for example, 4, 6, 8, etc., by which the weight of the first roller shaft itself is offset, so that the weight of the first roller shaft is not applied to the pole piece, and the pressure applied by the cylinder, that is, the rolling pressure, is controllable throughout the rolling process.

In one example, the tension of the at least two tension springs is not uniform for balancing the first roller shaft with uneven dead weight. Referring to fig. 9-13, a servo motor is arranged on one side of the roller, and the dead weights of the left and right sides of the roller are different in addition to unbalance of the roller, so that tension forces exerted by tension springs on different sides are different for balancing the dead weights of the two sides of the roller.

In one example, two weighing sensors are included for measuring the pressure of running roller both sides, when the pressure of left and right sides is inconsistent, can influence the pole piece of roll-in, and when the pressure difference of both sides is too big, weighing sensor can report to the police, reminds the staff to shut down the adjustment. Or when the pressure on two sides is overlarge, the system is controlled to stop, and the pressure difference on two sides of the weighing pressure sensor is alarmed to be overlarge.

In one example, referring to fig. 9-13, a plurality of fine adjustment features 1708 are included for adjusting the distance between the first roller and the second roller. The fine adjustment part 1708 includes an adjustment knob 17081, a screw 17082 rotated with the adjustment knob, and a fine adjustment block 17083 moved along the screw as the screw rotates, the fine adjustment block 17083 having a slope 17084 having a small inclination angle. The fine adjustment block 17083 is supported between the base frame and the first roller 17091; the inclined surface is in contact with the support surface of the first roller 17091.

In this example, the fine adjustment block moves along the screw rod along with the rotation of the adjustment knob, when the screw rod is moved by a distance varying by one rotation, for example, one wire, the distance of the one wire is mapped to the vertical direction by the tangent relation of the trigonometric function due to the effect of the inclined surface, the distance of the screw rod movement and the distance of the fine adjustment block inclined surface changing in the vertical direction can be adjusted by adjusting the angle, when the inclination angle is small, the distance can be small, the purpose of fine adjustment is achieved, the inclined surface is in contact with the supporting surface (the bottom surface of the bearing seat) of the first roller, when the screw rod is rotated, the first roller is lifted or lowered by a value which is the product of the movement distance of the screw rod and the tangent value of the inclination angle, and the adjustment can reach 0.001mm. The dial gauge can accurately display the distance.

In one example, a mechanical stop 1711 is used to limit the contact of the first roller with the second roller. Referring to fig. 9-13, the mechanical limiting mechanism may be L-shaped and mirror image shaped, and limits the bearing seat of the first roll shaft from the side surface of the base frame, on one hand, the freedom degree of the bearing seat in the left-right direction is limited, and on the other hand, the bearing seat is limited to be unable to move downwards, so as to prevent the first roll shaft from contacting with the second roll shaft.

In one example, the first roller 17091 and the second roller 17092 are driven by the first servo motor and the second servo motor to rotate respectively, and rotate in opposite directions with the roller axes respectively and drive the diaphragm and the pole piece to pass through the gap between the first roller and the second roller along the direction perpendicular to the central line direction of the first roller and the second roller.

Embodiment seven:

the present embodiment will be described with respect to the deviation correcting manipulator proposed in the foregoing embodiment, as shown in fig. 14 to 16, where the manipulator is integrally disposed on a long guide rail and can slide along the guide rail in a horizontal direction, and for clarity of description of the present embodiment, a direction in which the manipulator slides horizontally along the guide rail is defined as an 'X' direction, and a motor for driving the manipulator to move integrally in the X direction is an X-axis motor, where the motor may be a linear motor. The motor body can be mounted on a back plate and connected through a back plate guide rail, and meanwhile, the motor body can slide up and down relative to the back plate in the vertical direction, the vertical direction is defined as a Z direction, and the direction perpendicular to the X direction and the Z direction is a Y direction. The whole motor may slide along the X direction by the drive of the linear motor or may move up and down along the Z direction by the drive of the Z-axis servo motor 1101.

The moving motor body in the Z direction includes a main frame plate 1111 having an 'L' shape, i.e., a base frame plate 11111 and a vertical plate 11112 perpendicular to each other. The vertical plate 11112 is driven by a Z-axis servo motor, specifically, the Z-axis servo motor is connected to a ball screw 1104 in a vertical direction, the vertical plate 11112 of the 'L' -shaped main shelf plate is connected to the ball screw 1104, and when the Z-axis servo motor generates a driving force, the torque is a rotating torque, and the torque is converted into a driving force in a vertical direction by the ball screw 1104, so that when the Z-axis servo motor is driven, the ball screw can be driven, and the ball screw drives the main shelf plate to move up and down in the Z direction by the connection of the ball screw and the vertical plate 11112.

The main chassis 1111 also has a horizontal chassis 11111 part which moves in the X and Z directions along with the movement of the main chassis, and a deviation correcting device is mounted on the horizontal chassis, on the one hand, the deviation correcting device 1112 is mounted on the chassis 11111 through a Y-axis cylinder 1107 and a Y-direction slide rail, and when the Y-axis cylinder generates a driving force, the deviation correcting device is driven to move in the Y direction along the Y-direction slide rail; on the other hand, the deviation correcting device is connected with a sucker plate 1108 arranged below the main frame plate 1111 through a rotating shaft 11113, and the sucker plate 1108 can rotate around the rotating shaft; on the side of the chuck plate remote from the axis of rotation there is a cam shaft 1106, the center of which is parallel to the Y-axis when the cam shaft is in an equilibrium position, and the cam structure causes the chuck plate to deviate from a position parallel to the Y-axis when the cam shaft is rotated, which degree of deviation is defined as the θ -axis. The angle through which the suction cup plate rotates relative to the Y-axis, due to the actuation of the cam structure, is referred to as the θ angle, which can be controlled by a θ -axis servomotor 1105 to control the cam shaft and thus the attitude of the suction cup plate. This angle is typically between-15 deg. and 15 deg., but may also take on values within 15 deg. or slightly greater, for example no greater than 20 deg., depending on the operating conditions.

Therefore, after the sucker plate sucks one pole piece, the sucker plate can be controlled to rotate through the theta-axis servo motor 1105, so that the angle of the pole piece is adjusted, and the Y-axis electric cylinder drives the deviation correcting part to move in the Y axis, so that the position of the pole piece in the Y direction is adjusted; the position of the pole piece in the X-axis direction is driven and adjusted by the X-axis motor, and the position of the pole piece in the Z-axis direction is adjusted by the Z-axis servo motor and the ball screw.

In the working process, the standard posture and the spacing of the pole pieces are set through the industrial personal computer. After the sucking disc plate sucks one pole piece, parameters (X, Y, theta) of the sucked pole piece can be calculated through photographing of a CCD (not shown in the figure, the CCD is used for acquiring gesture projection of the pole piece on an XY plane along a Z axis) and a pattern recognition function, and the Z parameters can be fed back through a motor shaft sensor. Since the pole piece is finally placed on the diaphragm, the Z-axis height of the pole piece does not affect the attitude thereof, and the X-axis only affects the position of the pole piece, the attitude of the pole piece can be adjusted by the (Y, theta) parameters. For example, the pole piece has a standard posture of (Y1, theta 1), so that the posture adjustment can be realized by controlling the rotation (theta 1-theta) angle of the theta-axis servo motor 1105 and translating to Y1 through the Y-axis electric cylinder. Of course, the distance from the pole piece gesture to the standard gesture can be calculated through a trigonometric function, and meanwhile, the (Y, theta) parameters are adjusted to carry out translation and rotation.

After the pole piece posture is adjusted, the distance between the pole pieces can be controlled by controlling the translation of the X-axis motor, and the pole pieces can be arranged at equal intervals or non-equal intervals.

The embodiment has the following beneficial effects: the posture of the pole pieces can be flexibly adjusted and corrected, and the spacing of the pole pieces can be flexibly controlled.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. A thermal compounding device for an automated assembly line for processing lithium battery pole pieces, the device comprising:

a base frame;

the device comprises a deviation correcting manipulator (11) arranged on the base frame, an upper diaphragm unreeling device (12), a first flexible PET conveying line (13), a lower diaphragm unreeling device (14), a second flexible PET conveying line (15), a pretreatment mechanism (16) and a pair roller compound machine (17);

the deviation correcting manipulator (11) is used for adjusting the pole piece into a standard posture and placing the pole piece on a diaphragm conveyed by the lower diaphragm unreeling (14) at preset intervals;

the upper diaphragm unreels (12) and is used for conveying the diaphragm to cover the upper part of the pole piece placed by the deviation correcting manipulator;

the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) are used for providing a flexible PET conveyor belt;

the pretreatment mechanism (16) is used for preheating the diaphragm and the pole piece which are input into the pretreatment mechanism;

the pair-roller compound machine (17) is used for rolling the diaphragm and the pole piece which are input into the pair-roller compound machine;

wherein the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) do not enter the twin roller compounding machine (17).

2. Thermal compounding device according to claim 1, characterized in that, after the membrane delivered by the upper membrane unwind (12) is covered over the pole piece, the membrane and pole piece constitute:

the three-layer structure comprises a lower-layer diaphragm, a middle-layer pole piece and an upper-layer diaphragm;

and the pole pieces are arranged according to the corrected gesture of the correction manipulator and the preset distance.

3. The thermal compounding device according to claim 1, characterized in that the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) carry the diaphragms and pole pieces output by the deviation correcting manipulator (11) to be preheated in the pretreatment mechanism (16).

4. A thermal compounding device according to claim 3, characterized in that the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) are guided via guide posts in the same direction as the separator and pole piece conveying direction due to the separator and pole piece conveying direction being different before entering the pretreatment mechanism (16).

5. A thermal compounding device according to claim 3, characterized in that said first flexible PET conveyor line (13) and second flexible PET conveyor line (15) do not enter said twin-roll compounding machine (17) comprising:

the first flexible PET conveying line (13) and the second flexible PET conveying line (15) bear the diaphragm and the pole piece which are output by the deviation correcting manipulator (11), and are separated from the diaphragm and the pole piece through the guide post after being preheated in the pretreatment mechanism (16).

6. The thermal compounding device according to claim 1, characterized in that the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) each constitute a closed loop endless conveyor belt.

7. The thermal compounding device according to claim 1, characterized in that the diaphragm and pole piece are fed into the pair of roller compounding machine (17) tangentially to the roller shaft in the pair of roller compounding machine (17).

8. The processing method for the automatic assembly line for processing the lithium battery pole pieces is characterized by comprising the following steps of:

correcting the pole piece to a standard posture by a correction manipulator, and placing the pole piece on a diaphragm output by a lower diaphragm unreeling (14) at a preset interval; then, an upper diaphragm unreeling (12) output diaphragm covers above the pole piece placed by the deviation correcting manipulator;

a pretreatment step, namely, a first flexible PET conveying line (13) and a second flexible PET conveying line (15) wrap the diaphragm and the pole piece above and below respectively, and are input into a pretreatment mechanism (16) together for preheating;

and a rolling step, namely inputting the separator and the pole piece subjected to the pretreatment step into a double-roller compound machine (17) for rolling, wherein the first flexible PET conveying line (13) and the second flexible PET conveying line (15) do not enter the rolling machine.

9. The processing method according to claim 8, wherein the first flexible PET conveyor line (13) and the second flexible PET conveyor line (15) do not enter a roller press comprising:

after the pretreatment step, the first flexible PET conveying line (13) and the second flexible PET conveying line (15) are separated from the diaphragm and the pole piece along a direction different from the conveying direction of the diaphragm and the pole piece; and the diaphragm and the pole piece are input into a roller press for rolling.

10. The method of claim 8, wherein the separator and pole piece pretreated are fed to a twin roll compounding machine (17) for rolling comprising:

the diaphragm and the pole piece are input to the pair roller compounding machine (17) along the gap between the pair rollers in the pair roller compounding machine (17).