Lamination unit processing device and lamination equipment

Abstract

The utility model relates to a lamination unit processing device and lamination equipment. The lamination unit processing device comprises a compounding mechanism, a diaphragm feeding mechanism, a feeding conveying mechanism and a clamping and conveying mechanism, the pole piece is conveyed from the feeding conveying mechanism to the compounding mechanism, and the edge of at least one side of the pole piece is suspended by the feeding conveying mechanism, so that the clamping piece can smoothly clamp the pole piece conveyed by the feeding conveying mechanism. And after clamping the pole piece, the clamping piece is driven by the driving assembly to feed the pole piece into the composite channel and insert the pole piece between the two groups of diaphragm material belts. By driving the clamping piece to move back and forth, the pole pieces can be sequentially fed between the two groups of diaphragm material belts in a piece inserting manner. The clamping and conveying mechanism can smoothly clamp and stably insert the pole pieces, so that the feeding precision of the pole pieces can be ensured. Therefore, the compounding precision of the diaphragm material belt and the pole piece is relatively high, and the lamination unit in the composite material belt also has relatively high precision, so that the improvement of the quality of a battery cell is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery equipment, and particularly relates to a lamination unit processing device and a lamination equipment. Background Art

[0002] Lithium batteries have been widely used in fields such as electric vehicles and digital products. The battery cells of lithium batteries are formed by laminating electrode sheets and separator membranes. In order to improve the processing efficiency, the electrode sheets and the separator membranes can be first compounded to obtain a lamination unit, and then the lamination unit and the electrode sheets are alternately stacked to prepare the battery cells. The digital battery cells applied to digital products have small sizes and high precision requirements, and the corresponding electrode sheets also have the characteristics of small size and high precision. Therefore, when preparing the lamination unit, there are problems such as difficult feeding of the electrode sheets and difficult guarantee of feeding precision, which will affect the precision of the lamination unit and may ultimately affect the quality of the prepared battery cells. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a lamination unit processing device and a lamination equipment that can improve the quality of battery cells for the above problems.

[0004] A lamination unit processing device includes:

[0005] A compounding mechanism, which forms a compounding channel;

[0006] A separator feeding mechanism, which is used to convey two groups of separator tapes to the compounding mechanism;

[0007] A feeding and conveying mechanism, which is used to convey electrode sheets and make at least one side edge of the conveyed electrode sheets suspended; and

[0008] A clamping and conveying mechanism, which includes a driving component and a clamping member. The clamping member can reciprocate under the drive of the driving component to clamp the electrode sheets carried on the feeding and conveying mechanism, and send the clamped electrode sheets into the compounding channel and insert them between two groups of separator tapes. The compounding mechanism can compound the two groups of separator tapes and the electrode sheets entering the compounding channel into a compound tape containing a plurality of lamination units.

[0009] In one embodiment, the compounding mechanism includes two groups of relatively arranged hot pressing rollers, and the compounding channel is formed between the two groups of hot pressing rollers.

[0010] In one embodiment, the compounding mechanism further includes two groups of feeding rollers located upstream of the compounding channel. The diameter of the feeding rollers is smaller than the diameter of the hot pressing rollers, and the two groups of feeding rollers are relatively arranged and form a feeding channel. The electrode sheets and the two groups of separator tapes are fed into the compounding channel through the feeding channel.

[0011] In one embodiment, the diaphragm feeding mechanism includes an unwinding assembly and a deviation rectifying assembly, and the diaphragm tape unwound by the unwinding assembly enters the composite channel via the deviation rectifying assembly.

[0012] In one embodiment, the feeding and conveying mechanism includes a conveying line and a plurality of adsorption blocks arranged at equal intervals along the conveying direction of the conveying line. The adsorption blocks are used for carrying and adsorbing the electrode plates, and making the edges of at least one side of the carried electrode plates suspended.

[0013] In one embodiment, the driving assembly can drive the clamping member to translate in two directions parallel to the bearing surface and perpendicular to each other.

[0014] In one embodiment, it further includes a first vision detection mechanism and a second vision detection mechanism. The first vision detection mechanism is used for acquiring the image information and position information of the electrode plates on the feeding and conveying mechanism, and the second vision detection mechanism is used for acquiring the image information of the composite tape.

[0015] In one embodiment, it further includes a cutting mechanism. The cutting mechanism can cut the composite tape into a plurality of stacked sheet units, and each of the stacked sheet units includes an electrode plate and diaphragm sheet materials attached to both sides of the electrode plate.

[0016] In one embodiment, the cutting mechanism can cut the composite tape into the stacked sheet units and a continuous waste tape. The stacked sheet unit processing device further includes a waste winding mechanism for winding the waste tape.

[0017] In one embodiment, it further includes a discharging and conveying mechanism. The composite tape output by the composite mechanism is carried on the discharging and conveying mechanism and conveyed downstream by the discharging and conveying mechanism. The cutting mechanism can cut the composite tape carried on the discharging and conveying mechanism into the stacked sheet units.

[0018] In one embodiment, the cutting mechanism cuts the composite tape carried on the discharging and conveying mechanism into the stacked sheet units and a continuous waste tape by means of laser three-sided circumferential cutting.

[0019] In one embodiment, it further includes a tension control mechanism and a buffer mechanism located between the composite mechanism and the discharging and conveying mechanism. The composite tape can bypass the tension control mechanism and the buffer mechanism. The tension control mechanism can tension the composite tape, and the buffer mechanism can buffer or release the composite tape.

[0020] A stacking device, comprising:

[0021] The lamination unit processing device according to any one of the above preferred embodiments;

[0022] A first electrode sheet feeding device for supplying a first electrode sheet to the feeding and conveying mechanism, and the lamination unit processing device uses the first electrode sheet to produce a lamination unit;

[0023] A second electrode sheet feeding device for supplying a second electrode sheet, and the polarity of the second electrode sheet is opposite to that of the first electrode sheet; and

[0024] A lamination device capable of alternately stacking the lamination unit and the second electrode sheet to produce an electric core.

[0025] In the above lamination unit processing device and lamination equipment, the electrode sheet is conveyed by the feeding and conveying mechanism to the compounding mechanism. Since the feeding and conveying mechanism makes at least one edge of the electrode sheet suspended, the clamping member can smoothly clamp the electrode sheet conveyed by the feeding and conveying mechanism. After the clamping member clamps the electrode sheet, it will be driven by the driving assembly to send the electrode sheet into the compounding channel and insert it between two groups of separator tapes. By driving the clamping member to reciprocate, the electrode sheet can be sequentially sent between two groups of separator tapes in the way of inserting sheets. Since the clamping and conveying mechanism can smoothly clamp and stably insert the electrode sheet, the feeding accuracy of the electrode sheet can be guaranteed. Therefore, the accuracy of the compounding of the separator tape and the electrode sheet is relatively high, so the lamination unit in the compounded tape also has relatively high accuracy, which helps to improve the quality of the electric core. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of a lamination equipment in an embodiment of the present invention;

[0028] Figure 2 It is Figure 1 A top view of the first electrode sheet feeding device in the shown lamination equipment;

[0029] Figure 3 It is Figure 2 A front view of the shown first electrode sheet feeding device;

[0030] Figure 4 It is Figure 1 A schematic structural diagram of the lamination unit processing device in the shown lamination equipment;

[0031] Figure 5 It is Figure 4Schematic structural diagram of the stacked unit prepared by the stacked unit processing device shown. Detailed implementation manners

[0032] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0033] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0038] Please refer to Figure 1 , the present utility model provides a lamination device 10 and a lamination unit processing device 300. Among them, the above-mentioned lamination device 10 includes a first pole piece feeding device 100, a second pole piece feeding device 200, a lamination unit processing device 300 and a lamination device 400.

[0039] The first pole piece feeding device 100 and the second pole piece feeding device 200 are respectively used to provide the first pole piece 21 and the second pole piece, and the polarity of the second pole piece is opposite to that of the first pole piece 21. For example, the first pole piece 21 is a negative pole piece, and the second pole piece is a positive pole piece. The lamination unit processing device 300 can receive the first pole piece 21 provided by the first pole piece feeding device 100 and use the first pole piece 21 to produce a lamination unit 40a (see Figure 5 ), and the produced lamination unit 40a includes the first pole piece 21 and separator sheet materials 31 attached to both sides of the first pole piece 21.

[0040] The lamination device 400 can alternately stack the lamination unit 40a and the second pole piece to produce an electric core. The lamination device 400 generally includes a lamination table and a lamination manipulator 410 (, and the lamination manipulator 410 can alternately place the lamination unit 40a produced by the lamination unit processing device 300 and the second pole piece provided by the second pole piece feeding device 200 on the lamination table. In order to improve efficiency, the lamination device 400 is generally provided with two lamination tables, and the lamination unit 40a and the second pole piece can be stacked simultaneously on the two lamination tables, so as to increase the rhythm of the lamination manipulator and match the feeding speeds of the second pole piece feeding device 200 and the lamination unit processing device 300.

[0041] The first electrode sheet feeding device 100 and the second electrode sheet feeding device 200 may have the same structure or different structures. In this application, only the structure of the first electrode sheet feeding device 100 will be specifically described, and the structure of the second electrode sheet feeding device 200 can refer to that of the first electrode sheet feeding device 100.

[0042] Please refer to Figure 2 and Figure 3 , in this embodiment, the first electrode sheet feeding device 100 includes a traction mechanism 110, a first die-cutting mechanism 120 and a transfer mechanism 130.

[0043] The traction mechanism 110 can traction the electrode sheet strip 20 and convey the electrode sheet strip 20 to the first die-cutting mechanism 120. Specifically, in this embodiment, the traction mechanism 110 uses two pinch rollers to clamp the electrode sheet strip 20, and one of the pinch rollers is the main area roller. Driven by the main area roller, the clamped electrode sheet strip 20 can be conveyed to the downstream first die-cutting mechanism 120.

[0044] The first die-cutting mechanism 120 includes a first lower die 121 and a first upper die 122. Among them, the first upper die 122 can lift and press down relative to the first lower die 121, and the electrode sheet strip 20 can enter between the first lower die 121 and the first upper die 122 under the conveyance of the traction mechanism 110. Moreover, each time the first upper die 122 presses down, the electrode sheet strip 20 can be cut into a plurality of first electrode sheets 21.

[0045] A die-cutting plate with a required shape is pre-formed on the first lower die 121 or the first upper die 122. When the first upper die 122 presses down, the electrode sheet strip 20 can be pressed against the first lower die 121, and the electrode sheet strip 20 can be cut into the first electrode sheets 21 through the die-cutting plate. When the first upper die 122 lifts, the cut first electrode sheets 21 will remain on the surface of the first lower die 121.

[0046] Specifically in this embodiment, adsorption holes (not shown in the figure) communicating with the negative pressure cavity are formed on the surface of the first lower die 121. The adsorption holes can form a negative pressure on the surface of the first lower die 121 to adsorb the cut first electrode sheets 21, thereby preventing the first electrode sheets 21 from adhering to the first upper die 122 and moving up with it. In addition, waste materials, dust, etc. generated during cutting can be sucked away through the adsorption holes, thereby preventing the die-cutting space from being contaminated and affecting the cutting accuracy.

[0047] In addition, in this embodiment, the first pole piece feeding device 100 further includes a second die-cutting mechanism 140. The second die-cutting mechanism 140 is disposed upstream of the traction mechanism 110, and the pole piece strip 20 can pass through the second die-cutting mechanism 140 under the traction of the traction mechanism 110. The second die-cutting mechanism 140 can process ears and rounded corners at the edges of the pole piece strip 20. When the first upper die 122 presses down, the pole piece strip 20 can be cut to obtain the first pole piece 21.

[0048] The first pole piece 21 formed by die-cutting twice by the first die-cutting mechanism 120 and the second die-cutting mechanism 140 includes at least one ear, and at least one top angle is a rounded corner. Preferably, all four top angles are rounded corners. The rounded corners enable the first pole piece 21 to have no sharp corners, which can avoid piercing the separator during the subsequent stacking process of preparing the battery cell, thereby improving the safety of the battery cell. Further, since the first pole piece 21 is formed in two steps, and its ears and rounded corners are formed by the second die-cutting mechanism 140, the first die-cutting mechanism 120 only needs to cut the pole piece strip 20 during die-cutting. This simplifies the die structures of both the first die-cutting mechanism 120 and the second die-cutting mechanism 140 compared to the die structure of one-piece punching and cutting, which helps to improve the forming accuracy of the first pole piece 21.

[0049] Moreover, the degrees of wear of the die during the processing of the ears and the cutting of the pole piece strip 20 are different. Therefore, if a die of one-piece punching and cutting is used to simultaneously process the ears and cut the pole piece strip 20, it will cause uneven wear of the die, resulting in the need to replace the entire die. By using the first die-cutting mechanism 120 and the second die-cutting mechanism 140 to separately cut the pole piece strip 20 and form the ears, the dies of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 can achieve uniform wear during use, which is beneficial to extending the service life of the die.

[0050] In addition, when the die of either the first die-cutting mechanism 120 or the second die-cutting mechanism 140 is severely worn, it can be replaced or repaired separately, and the other can be used normally. Further, since the die structures of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 are simpler than the die structure of one-piece punching and cutting and can be repaired separately, the difficulty of die repair can be significantly reduced.

[0051] Specifically, in this embodiment, the second die-cutting mechanism 14 includes two relatively arranged second dies 141. The two side edges in the width direction of the pole piece strip 20 passing through the second die-cutting mechanism 140 can respectively pass through the two second dies 141, and the distance between the two second dies 141 is adjustable.

[0052] The second mold 141 has a similar structure to the first die-cutting mechanism 120, and also includes an upper mold and a lower mold. The two second molds 141 can respectively die-cut the two edges in the width direction, thereby processing the pole tabs and / or fillets on the two edges. Specifically, one second mold 141 in this embodiment is used to process the fillet on one side edge of the pole piece strip 20, and the other second mold 141 is used to process the fillet on the other side edge of the pole piece strip 20 while also processing the pole tab. Moreover, by adjusting the distance between the two second molds 141, the length of the finally formed first pole piece 21 can be controlled, thereby ensuring the accuracy of the length dimension of the first pole piece 21.

[0053] Furthermore, in this embodiment, the first upper mold 122 includes a plurality of cutters 1221 arranged in parallel and at equal intervals. When the first upper mold 122 is pressed downward, a first pole piece 21 can be cut out between two adjacent cutters 1221 .

[0054] for example, Figure 2 The first upper mold 122 shown includes three cutters 1221, so the first upper mold 122 can be pressed down once to cut two first pole pieces 21. The cutters 1221 extend along the width direction of the pole piece strip 20. When the first upper mold 122 is pressed down, multiple cuts extending along the width direction can be formed on the pole piece strip 20, and the first pole piece 21 can be obtained between two adjacent cuts. The distance between two adjacent cuts (or, the distance between two adjacent cutters 1221) is equal to the width of the single first pole piece 21 obtained by cutting. Since the spacing between two adjacent cutters 1221 is determined each time the first upper mold 122 is pressed down, the consistency of the width of the multiple first pole pieces 21 obtained by cutting can be ensured.

[0055] Furthermore, in this embodiment, the distance between the multiple cutters 1221 is adjustable. Therefore, by adjusting the spacing between the cutters 1221, the width of the final formed first electrode sheet 21 can be controlled, thereby ensuring the accuracy of the width dimension of the first electrode sheet 21. Moreover, different spacing between the cutters 1221 can be used to cut first electrode sheets 21 of different widths, making the first electrode sheet feeding device 100 suitable for processing first electrode sheets 21 of different sizes.

[0056] The transfer mechanism 130 includes a discharge transfer assembly 131 and a discharge conveying assembly 132. The discharge transfer assembly 131 is capable of grabbing the first electrode piece 21 located in the first lower mold 121 when the first upper mold 122 is lifted, and transferring the multiple first electrode pieces 21 obtained by pressing the first upper mold 122 downward at one time to the discharge conveying assembly 132. The discharge transfer assembly 131 can be a manipulator, a multi-axis mobile platform, or a multi-axis robot with a suction cup at the end, and the suction cup can absorb the first electrode piece 21. The discharge conveying assembly 132 can be a vacuum belt that can absorb the received first electrode piece 21 and convey it downstream.

[0057] When the first upper die 122 is lifted, it can avoid interfering with the discharging and transferring assembly 131. Therefore, the discharging and transferring assembly 131 can transfer the first pole piece 21 on the first lower die 121 to the discharging and conveying assembly 132 during the gap when the first upper die 122 is lifted. Thus, the first lower die 121 can maintain a fixed position, and the first upper die 122 can press down and lift alternately according to a preset frequency to cut the pole piece strip 20 into the first pole pieces 21 in sequence, thereby significantly improving the production beat of the pole piece manufacturing. Moreover, since multiple first pole pieces 21 can be cut in one pressing down of the first upper die 122, more first pole pieces 21 can be produced per unit time.

[0058] In this embodiment, transfer mechanisms 130 are respectively arranged on opposite sides of the first die-cutting mechanism 120, and the discharging and transferring assemblies 131 of the two transfer mechanisms 130 on both sides can alternately grab the first pole pieces 21 located on the first lower die 121.

[0059] Since multiple first pole pieces 21 can be cut in one pressing down of the first upper die 122, a single discharging and transferring assembly 131 may not be able to pick up multiple first pole pieces 21 at one time in time, resulting in the need to extend the lifting time of the first upper die 122. By arranging transfer mechanisms 130 on both sides, the two discharging and transferring assemblies 131 can act alternately, so as to quickly pick up the first pole pieces 21 on the first lower die 121, which helps to further improve the production beat of the pole piece manufacturing.

[0060] Or, a single discharging and transferring assembly 131 can grab multiple first pole pieces 21 at the same time. After one of the discharging and transferring assemblies 131 moves the multiple first pole pieces 21 obtained by one pressing down of the first upper die 122 from the first lower die 121, the first upper die 122 can perform the next pressing down to obtain multiple first pole pieces 21 without waiting for the discharging and transferring assembly 131 to return. At this time, the multiple first pole pieces 21 obtained by the next pressing down can be transferred by the other discharging and transferring assembly 131. Circulating in this way also helps to further improve the beat of the first die-cutting mechanism 120.

[0061] In addition, in this embodiment, the transfer mechanism 130 further includes a visual detection component 133, a variable pitch transfer component 134, a positioning platform 135 and a blanking transfer component 136. The visual detection component 133 is used to obtain the image information of the first pole piece 21 on the discharging and conveying assembly 132. The variable pitch transfer component 134 is used to transfer the first pole piece 21 on the discharging and conveying assembly 132 to the positioning platform 135 and increase the distance between adjacent two first pole pieces 21. The blanking transfer component 136 is used to grab the first pole piece 21 on the positioning platform 135 and perform blanking.

[0062] The visual inspection component 133 can be a CCD camera and can be installed above the discharge conveyor component 132. The first electrode pieces 21 conveyed by the discharge conveyor component 132 can sequentially pass through the inspection range of the visual inspection component 133. By comparing the image information obtained by the visual inspection component 133 with the reference information, it can be determined whether the first electrode piece 21 has defects.

[0063] A vision module (not shown) is provided above the positioning platform 135 to obtain position information of the first pole piece 21 on the positioning platform 135. The positioning platform 135 then performs position correction on the first pole piece 21 based on the position information provided by the vision module to ensure that the blanking transfer assembly 136 can smoothly grasp the first pole piece 21 on the positioning platform 135. Specifically, the positioning platform 135 can drive the carried first pole piece 21 to translate and rotate in at least two directions to achieve the purpose of correcting and positioning.

[0064] The variable-pitch transfer assembly 134 can grab multiple first pole pieces 21 at a time and, after spacing them apart, place them on the positioning platform 135. Typically, the number of first pole pieces 21 grabbed by the variable-pitch transfer assembly 134 at a time is equal to the number of first pole pieces 21 produced by each downward press of the first upper mold 122. By increasing the distance between two first pole pieces 21, the edges of adjacent first pole pieces 21 can be prevented from interfering with each other, thereby ensuring that the vision module above the positioning platform 135 can accurately obtain the position information of the first pole pieces 21.

[0065] The transfer assembly 136 can be a multi-axis robot with a suction cup mounted on its end for picking up the first pole piece 21. After grabbing the first pole piece 21, the transfer assembly 136 can transfer the first pole piece 21 to a designated position according to the detection structure of the visual detection assembly 133.

[0066] Furthermore, in this embodiment, the first electrode feeding device 100 also includes a material unloading conveying mechanism 150 and an NG material box 160 , and the material unloading transfer component 136 can unload the first electrode 21 grasped from the positioning platform 135 to the material unloading conveying mechanism 150 or the NG material box 160 .

[0067] The unloading and conveying mechanism 150 can also use a vacuum belt to absorb and receive the first electrode sheets 21. Specifically, the unloading and transfer assembly 136 unloads first electrode sheets 21 that pass inspection to the unloading and conveying mechanism 150, which then transports them to the lamination unit processing device 300. For first electrode sheets 21 that fail inspection, the unloading and transfer assembly 136 unloads them to the NG material box 160 for scrapping.

[0068] Please also refer to Figure 4, the lamination unit processing device 300 in an embodiment of the present utility model includes a composite mechanism 310, a diaphragm feeding mechanism 320, a feeding conveying mechanism 330, and a pinch conveying mechanism 340.

[0069] The composite mechanism 310 is formed with a composite channel; the diaphragm feeding mechanism 320 is used to convey two sets of diaphragm tapes 30 to the composite mechanism 310, and the two sets of diaphragm tapes 30 can enter the above-mentioned composite channel; the feeding conveying mechanism 330 is used to convey the electrode sheets, specifically the first electrode sheet 21. Obviously, in other embodiments, when the second electrode sheet is used to prepare the lamination unit 40a, the electrode sheet is the second electrode sheet. The pinch conveying mechanism 340 can pick up the first electrode sheet 21 conveyed by the feeding conveying mechanism 330, and send the first electrode sheet 21 into the composite channel and insert it between the two sets of diaphragm tapes 30. The composite mechanism 310 can composite the two sets of diaphragm tapes 30 and the first electrode sheet 21 entering the composite channel into a composite tape 40, and the composite tape 40 includes two layers of diaphragm tapes 30 and a plurality of first electrode sheets 21 clamped between the two layers of diaphragm tapes 30 and arranged at intervals. It can be seen that the composite tape 40 obtained by composite contains a plurality of lamination units 40a.

[0070] Specifically in this embodiment, the composite mechanism 310 includes two sets of hot pressing rollers 311 arranged oppositely, and a composite channel is formed between the two sets of hot pressing rollers 311. The two sets of diaphragm tapes 30 and the first electrode sheet 21 entering the composite channel are composite under the extrusion of the two sets of hot pressing rollers 311, and the composite effect is better.

[0071] In addition, generally two diaphragm feeding mechanisms 320 are provided, and the two diaphragm feeding mechanisms 320 are respectively located on both sides of the composite mechanism 310 and respectively supply the diaphragm tapes 30 to the composite mechanism 310. Specifically in this embodiment, the diaphragm feeding mechanism 320 includes an unwinding assembly 321 and a deviation rectifying assembly 322, and the diaphragm tape 30 unwound by the unwinding assembly 321 passes through the deviation rectifying assembly 322 and enters the composite channel.

[0072] The deviation rectifying assembly 322 can adjust the angle and direction of the diaphragm tape 30 entering the composite channel, so as to ensure that the two sets of diaphragm tapes 30 are aligned with each other and are also effectively aligned with the first electrode sheet 21 entering the composite channel, thereby ensuring the accuracy of the composite tape 20 obtained by composite. Obviously, in order to ensure the smooth continuous unwinding of the diaphragm tape 30, each diaphragm feeding mechanism 320 generally further includes an automatic tape splicing assembly, a tension control assembly, a diaphragm dust removal assembly, etc.

[0073] The feeding and conveying mechanism 330 can receive the first pole piece 21 produced by the first pole piece feeding device 100. That is, the blanking and conveying mechanism 150 can convey the first pole piece 21 to the feeding and conveying mechanism 330, and the feeding and conveying mechanism 330 continues to convey it to the laminating mechanism 310. Among them, the feeding and conveying mechanism 330 can make the edge of at least one side of the conveyed first pole piece 21 suspended. The suspension of the edge of the first pole piece 21 means that the lower part of the edge does not contact the feeding and conveying mechanism 330, so that both sides of the edge of the first pole piece 21 are exposed. In this way, it is convenient for the clamping and conveying mechanism 340 to clamp the first pole piece 21 conveyed by the feeding and conveying mechanism 330.

[0074] Specifically, the first pole piece 21 is horizontally placed on the feeding and conveying mechanism 330, that is, the length direction of the first pole piece 21 is perpendicular to the conveying direction, and the feeding and conveying mechanism 330 can make the edge in the length direction of the first pole piece 21 suspended. Therefore, after the clamping and conveying mechanism 340 clamps the first pole piece 21, it can be sent into the laminating channel without rotating the first pole piece 21.

[0075] In this embodiment, the feeding and conveying mechanism 330 includes a conveying line 331 and a plurality of adsorption blocks 332 arranged at equal intervals along the conveying direction of the conveying line 331. The adsorption blocks 332 are used to carry and adsorb the first pole piece 21, and make the edge of at least one side of the carried first pole piece 21 suspended.

[0076] The first pole piece 21 produced by the first pole piece feeding device 100 can be successively received by a plurality of adsorption blocks 332. The width of the adsorption blocks 332 can be set to be smaller than the length of the first pole piece 21, so that the edge of the first pole piece 21 is suspended. Moreover, the adsorption blocks 332 can be communicated with a vacuum chamber (not shown in the figure) and can adsorb the first pole piece 21 through negative pressure, so as to ensure that the first pole piece 21 is smoothly conveyed to a position where it can be clamped by the clamping and conveying mechanism 340.

[0077] The clamping and conveying mechanism 340 includes a driving component 341 and a clamping member 342. The clamping member 342 can reciprocate under the drive of the driving component 341 to clamp the pole piece carried on the feeding and conveying mechanism 330 and send the clamped pole piece into the laminating channel and insert it between two groups of diaphragm tapes 30. The clamping member 342 can be composed of two relatively arranged clamping plates that can approach and separate from each other, and can preferably clamp the suspended edge of the first pole piece 21. The driving component 341 can drive the clamping member 342 to move between the feeding and conveying mechanism 330 and the laminating mechanism 310. The clamping member 342 clamps the first pole piece 21 when approaching the feeding and conveying mechanism 330, and inserts the first pole piece 21 into the laminating channel when approaching the laminating mechanism 310. Therefore, it can ensure the effective matching of the beat of the continuous feeding of the first pole piece feeding device 100 and the beat of the intermittent feeding of the first pole piece 21.

[0078] By driving the clamping member 342 to reciprocate, the first pole piece 21 can be fed between the two sets of diaphragm tapes 30 in the form of inserting sheets. Since the clamping and feeding mechanism 340 can successfully clamp and stably insert the first pole piece 21, the feeding accuracy of the first pole piece 21 can be ensured. Therefore, the accuracy of the composite of the diaphragm tape 30 and the first pole piece 21 is relatively high.

[0079] In this embodiment, the composite mechanism 310 further includes two sets of feeding rollers 312 located upstream of the composite channel. The diameter of the feeding rollers 312 is smaller than that of the hot pressing roller 311, and the two sets of feeding rollers 312 are arranged oppositely to form a feeding channel. The first pole piece 21 and the two sets of diaphragm tapes 30 are fed into the composite channel through the feeding channel.

[0080] When inserting the first pole piece 21, the clamping member 342 first inserts the first pole piece 21 between the two feeding rollers 312, and then the feeding rollers 312 insert it into the composite channel. Since the diameter of the feeding rollers 312 is smaller than that of the hot pressing roller 311, the occupied space is small, so a relatively large operating space can be reserved upstream of the composite channel for the clamping member 342 to act. Moreover, the feeding rollers 312 with a smaller diameter can clamp the first pole piece 21 more reliably than the hot pressing roller 311. Therefore, even if the size of the first pole piece 21 is small, it can be smoothly introduced into the composite channel through the two feeding rollers 312.

[0081] In this embodiment, the driving assembly 341 can drive the clamping member 342 to translate in two directions parallel to the bearing surface and perpendicular to each other. Specifically, by driving the clamping member 342 to move, the driving assembly 341 can correct the deviation of the first pole piece 21 clamped by the clamping member 342, so as to ensure that the first pole piece 21 is aligned with the diaphragm tapes 30 on both sides when entering the composite channel.

[0082] In addition, in this embodiment, the lamination unit processing device 300 further includes a first vision detection mechanism 361 and a second vision detection mechanism 362. The first vision detection mechanism 361 is used to obtain the image information and position information of the first pole piece 21 on the feeding and conveying mechanism 330, and the second vision detection mechanism 362 is used to obtain the image information of the composite tape 40.

[0083] Both the first vision detection mechanism 361 and the second vision detection mechanism 362 can use CCD cameras. By obtaining the image information of the first pole piece 21, the first vision detection mechanism 361 can detect the outer shape size and surface defects of the first pole piece 21, so as to screen out the NG pole pieces and feedback them to the subsequent processes to facilitate the removal of the NG pole pieces. Specifically, the NG pole pieces can be removed before lamination or after lamination. In order to ensure the constant beat of the equipment, the NG pole pieces in this embodiment are removed after lamination.

[0084] The first vision detection mechanism 361 can also obtain the position information of the first pole piece 21, and this position information refers to the relative position of the first pole piece 21 on the feeding and conveying mechanism 330. More specifically, the first vision detection mechanism 361 can feed back the obtained position information to the driving component 341, so as to facilitate the driving component 341 to drive the clamping piece 342 to correct the deviation of the first pole piece 21.

[0085] According to the image information of the composite tape 40 obtained by the second vision detection mechanism 362, the relative positions of the two groups of separator tapes 30 and the first pole piece 21 can be obtained, so as to detect whether the separator tapes 30 and the first pole piece 21 in the composite tape 40 are aligned. If there is a deviation, the deviation information can also be fed back to the deviation correction component 322, and the deviation correction component 322 can accurately adjust the angle and direction of the separator tape 30 entering the composite channel accordingly, so as to further ensure the composite accuracy.

[0086] In this embodiment, the lamination unit processing device further includes a cutting mechanism 350. The cutting mechanism 350 can cut the composite tape 40 into a plurality of lamination units 40a, and each lamination unit 40a includes a first pole piece 21 and separator sheet materials 31 attached to both sides of the first pole piece. Specifically, the separator tape 30 can be cut into sheets to obtain the separator sheet materials 31. The cutting mechanism 350 can cut the composite tape 40 by means of blade cutting, laser cutting, etc.

[0087] Specifically in this embodiment, the cutting mechanism 350 can cut the composite tape 40 into lamination units 40a and a continuous waste tape 40b, and the lamination unit processing device 300 further includes a waste winding mechanism 370, and the waste winding mechanism 370 is used for winding the waste tape 40b.

[0088] That is to say, when the cutting mechanism 350 cuts the composite tape 40, it does not cut off the separator tape 30, but only cuts the lamination unit 40a from the original composite tape 40, and the remaining part forms a continuous waste tape 40b. The waste tape 40b can be wound by the waste winding mechanism 370, which is more convenient for collecting and discharging waste.

[0089] It should be noted that for the first pole piece 21 determined to be an NG pole piece in the previous steps, the cutting mechanism 350 will not cut it from the composite tape 40 when cutting the composite tape 40, but leave it on the waste tape 40b for rejection, avoiding the NG pole piece from entering the subsequent lamination process.

[0090] In addition, in this embodiment, the laminated unit processing device 300 further includes a discharging conveying mechanism 380. The composite tape 40 output by the composite mechanism 310 is carried on the discharging conveying mechanism 380 and conveyed downstream by the discharging conveying mechanism 380. The cutting mechanism 350 can cut the composite tape 40 carried on the discharging conveying mechanism 380 into laminated units 40a.

[0091] The discharging conveying mechanism 380 can adopt a vacuum belt, which can better adsorb and fix the composite tape 40. Since the cutting mechanism 350 can cut the composite tape 40 during the continuous conveying of the discharging conveying mechanism 380, the composite tape 40 can always keep running, thus ensuring the continuity and stability of the processing process. The cut laminated units 40a remain on the discharging conveying mechanism 380 and continue to be conveyed downstream.

[0092] More specifically, in this embodiment, the cutting mechanism 350 cuts the composite tape 40 carried on the discharging conveying mechanism 380 into laminated units 40a and a continuous waste tape 40b by means of laser three-sided cutting.

[0093] Specifically, the light spot emitted by the cutting mechanism 350 can move along the -shaped path, so as to cut multiple laminated units 40a from the composite tape 40 in sequence and leave the waste tape 40b. The above cutting method is more efficient, and the three edges of each obtained laminated unit 40a are cut, so it can also ensure the dimensional accuracy of the laminated unit 40a.

[0094] Furthermore, in this embodiment, the laminated unit processing device 300 further includes a tension control mechanism 391 and a buffer mechanism 392 located between the composite mechanism 310 and the discharging conveying mechanism 380. The composite tape 40 can bypass the tension control mechanism 391 and the buffer mechanism 392. The tension control mechanism 391 can tension the composite tape 40, and the buffer mechanism 392 can buffer or release the composite tape 40.

[0095] The tension control mechanism 391 and the buffer mechanism 392 can maintain the stable tension of the composite tape 40, so as to ensure that the composite tape 40 can be smoothly conveyed downward. Moreover, when the speed of the discharging conveying mechanism 380 fluctuates, or when the composite tape 40 pauses or is pulled during the cutting of the composite tape 40 by the cutting mechanism 350, the buffer mechanism 392 can buffer or release the tape 40 for compensation, so as to ensure that the composite tape 40 can always maintain a tensioned state without breaking.

[0096] In addition, the laminated unit processing device 300 generally further includes a handling mechanism 393 located on the downstream side of the discharging conveying mechanism 380. The handling mechanism 393 can be a manipulator with a suction cup. The handling mechanism 393 is capable of timely transferring the laminated unit 40a conveyed along the discharging conveying mechanism 380 to the laminating device 400.

[0097] In the above-mentioned laminated unit processing device 300 and the laminating equipment 10, the electrode sheet is conveyed from the feeding conveying mechanism 330 to the compounding mechanism 310. Since the feeding conveying mechanism 330 makes the edge of at least one side of the electrode sheet suspended, the clamping member 342 can smoothly clamp the electrode sheet conveyed by the feeding conveying mechanism 330. After clamping the electrode sheet, the clamping member 342 will, under the drive of the drive assembly 341, send the electrode sheet into the compounding channel and insert it between two groups of separator tapes 30. By driving the clamping member 342 to reciprocate, the electrode sheet can be sequentially sent between two groups of separator tapes 30 in the way of inserting sheets. Since the clamping and conveying mechanism 340 can smoothly clamp and stably insert the electrode sheet, the feeding accuracy of the electrode sheet can be guaranteed. Therefore, the accuracy of the compounding of the separator tapes 30 and the electrode sheet is relatively high, so the laminated unit 40a in the compound tape 40 also has a relatively high accuracy, which helps to improve the quality of the battery cell.

[0098] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0099] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A laminated unit processing device, characterized in that Comprising: A composite mechanism, forming a composite channel; A diaphragm feeding mechanism for conveying two sets of diaphragm tapes to the composite mechanism; A feeding and conveying mechanism for conveying the pole piece and making the edge of at least one side of the conveyed pole piece suspended; And A pinch conveying mechanism, including a driving component and a clamping member, the clamping member can reciprocate under the drive of the driving component to clamp the pole piece carried on the feeding and conveying mechanism, and feed the clamped pole piece into the composite channel and insert it between the two sets of diaphragm tapes, and the composite mechanism can composite the two sets of diaphragm tapes and the pole piece entering the composite channel into a composite tape including a plurality of laminated units.

2. The lamination unit processing device according to claim 1, characterized in that, The composite mechanism includes two sets of hot pressing rollers arranged oppositely, and the composite channel is formed between the two sets of hot pressing rollers.

3. The laminated unit processing device according to claim 2, wherein The composite mechanism further includes two sets of feeding rollers located upstream of the composite channel, the diameter of the feeding rollers is smaller than that of the hot pressing rollers, and the two sets of feeding rollers are arranged oppositely and form a feeding channel, and the pole piece and the two sets of diaphragm tapes are fed into the composite channel through the feeding channel.

4. The laminated unit processing device according to claim 1, wherein The diaphragm feeding mechanism includes an unwinding component and a deviation rectifying component, and the diaphragm tape unwound by the unwinding component passes through the deviation rectifying component and enters the composite channel.

5. The lamination unit processing apparatus according to claim 1, wherein The feeding and conveying mechanism includes a conveying line and a plurality of adsorption blocks arranged at equal intervals along the conveying direction of the conveying line, and the adsorption blocks are used for carrying and adsorbing the pole piece and making the edge of at least one side of the carried pole piece suspended.

6. The laminated unit processing device according to claim 5, characterized in that The driving component can drive the clamping member to translate in two directions parallel to the bearing surface of the adsorption block and perpendicular to each other.

7. The laminated unit processing device according to claim 1, wherein, It further includes a first vision detection mechanism and a second vision detection mechanism, the first vision detection mechanism is used to obtain the image information and position information of the pole piece on the feeding and conveying mechanism, and the second vision detection mechanism is used to obtain the image information of the composite tape.

8. The lamination unit processing device according to claim 1, characterized in that, It further includes a cutting mechanism, and the cutting mechanism can cut the composite tape into a plurality of laminated units, and each laminated unit includes a pole piece and diaphragm pieces attached to both sides of the pole piece.

9. The lamination unit processing apparatus according to claim 8, wherein, The cutting mechanism can cut the composite tape into the laminated units and a continuous waste tape, and the laminated unit processing device further includes a waste winding mechanism for winding the waste tape.

10. The laminated unit processing device according to claim 8, characterized in that, It further includes a discharging and conveying mechanism, the composite tape output by the composite mechanism is carried on the discharging and conveying mechanism and is conveyed downstream by the discharging and conveying mechanism, and the cutting mechanism can cut the composite tape carried on the discharging and conveying mechanism into the laminated units.

11. The laminated unit processing device according to claim 10, wherein The cutting mechanism cuts the composite tape carried on the discharging and conveying mechanism into the laminated units and a continuous waste tape by means of laser three-sided cutting.

12. The laminated unit processing apparatus according to claim 10, characterized in that, It further includes a tension control mechanism and a buffer mechanism located between the composite mechanism and the discharging and conveying mechanism, the composite tape can bypass the tension control mechanism and the buffer mechanism, the tension control mechanism can tension the composite tape, and the buffer mechanism can buffer or release the composite tape.

13. A lamination device, characterized in that, Comprising: The laminated unit processing device according to any one of claims 1 to 12 above; The first electrode sheet feeding device is used to supply the first electrode sheet to the feeding and conveying mechanism, and the laminated unit processing device uses the first electrode sheet to produce a laminated unit; The second electrode sheet feeding device is used to supply the second electrode sheet, and the polarity of the second electrode sheet is opposite to that of the first electrode sheet; and The laminating device is capable of alternately stacking the laminated unit and the second electrode sheet to produce an electric core.

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