Lamination unit processing device and lamination apparatus

Abstract

The present application relates to a lamination unit processing device and a lamination apparatus. The lamination unit processing device comprises a compositing mechanism, a separator feeding mechanism, a feed conveying mechanism, and a clamping and conveying mechanism. An electrode sheet is conveyed from the feed conveying mechanism to the compositing mechanism, and since the feed conveying mechanism enables the edge of at least one side of the electrode sheet to be suspended, a clamping member can smoothly clamp the electrode sheet conveyed by the feed conveying mechanism. After clamping the electrode sheet, the clamping member is driven by a driving assembly to feed the electrode sheet into a compositing channel and insert same between two sets of separator strips. By driving the clamping member to perform a reciprocating motion, electrode sheets can be sequentially fed between the two sets of separator strips by means of sheet insertion. Since the clamping and feeding mechanism can smoothly clamp and stably insert the electrode sheet, the feeding accuracy of the electrode sheet can be ensured. Therefore, the accuracy of compositing the separator strips and the electrode sheet is relatively high, and thus a lamination unit in a composite strip also has relatively high accuracy, thereby facilitating an improvement in the quality of a battery cell.

Description

Lamination unit processing device and lamination device TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery equipment, in particular to a lamination unit processing device and a lamination device. BACKGROUND

[0002] Lithium batteries have been widely used in electric vehicles, digital products and other fields. The battery cell is composed of electrode plates and separators. In order to improve the processing efficiency, the electrode plates and the separators can be combined to obtain a lamination unit, and then the lamination unit and the electrode plates are alternately stacked to prepare the battery cell. The digital battery applied to digital products has small size and high precision, and the corresponding electrode plate also has the characteristics of small size and high precision. Therefore, during the preparation of the lamination unit, the electrode plate has the problems of difficult feeding and difficult guarantee of feeding precision, which will affect the precision of the lamination unit and finally affect the quality of the prepared battery cell.

[0003] SUMMARY

[0004] Therefore, it is necessary to provide a lamination unit processing device and a lamination device capable of improving the quality of the battery cell.

[0005] A lamination unit processing device comprises:

[0006] A combination mechanism is formed with a combination channel.

[0007] A separator supply mechanism is used to supply two groups of separator material belts to the combination mechanism.

[0008] A feeding and conveying mechanism is used to convey the electrode plates and make the edges of at least one side of the conveyed electrode plates suspended.

[0009] A pinch mechanism comprises a driving assembly and a clamping piece. The clamping piece can reciprocate under the driving of the driving assembly to clamp the electrode plates carried by the feeding and conveying mechanism, and send the clamped electrode plates into the combination channel and insert them between the two groups of separator material belts. The combination mechanism can combine the two groups of separator material belts and the electrode plates entering the combination channel into a combination material belt containing a plurality of lamination units.

[0010] In one embodiment, the combination mechanism comprises two groups of hot pressing rollers arranged oppositely, and the combination channel is formed between the two groups of hot pressing rollers.

[0011] In one embodiment, the combination mechanism further comprises two groups of feeding rollers located upstream of the combination channel. The diameter of the feeding rollers is smaller than that of the hot pressing rollers, and the two groups of feeding rollers are arranged oppositely and form a feeding channel. The electrode plates and the two groups of separator material belts are sent into the combination channel through the feeding channel.

[0012] In one of the embodiments, the separator feeding mechanism comprises a separator unwinding assembly and a deviation rectifying assembly, the separator unwinding assembly unwinds a separator material strip, and the separator material strip passes through the deviation rectifying assembly to enter the composite channel.

[0013] In one of the embodiments, the feeding conveying mechanism comprises a conveying line and a plurality of suction blocks arranged along the conveying line at equal intervals in the conveying direction, the suction blocks are used to carry and suck the pole piece, and the edges of at least one side of the carried pole piece are suspended.

[0014] In one of the embodiments, the driving assembly is capable of driving the clamping members to translate in two directions parallel to the carrying surface and perpendicular to each other.

[0015] In one of the embodiments, the device further comprises a first visual detection mechanism and a second visual detection mechanism, the first visual detection mechanism is used to acquire image information and position information of the pole piece on the feeding conveying mechanism, and the second visual detection mechanism is used to acquire image information of the composite material strip.

[0016] In one of the embodiments, the device further comprises a cutting mechanism, the cutting mechanism is capable of cutting the composite material strip into a plurality of stack units, and each of the stack units comprises one pole piece and separator sheet materials attached to both sides of the pole piece.

[0017] In one of the embodiments, the cutting mechanism is capable of cutting the composite material strip into the stack units and a continuous waste material strip, and the stack unit processing device further comprises a waste material winding mechanism, the waste material winding mechanism is used to wind the waste material strip.

[0018] In one of the embodiments, the device further comprises an outfeed conveying mechanism, the composite material strip output by the composite mechanism is carried on the outfeed conveying mechanism and conveyed downstream by the outfeed conveying mechanism, and the cutting mechanism is capable of cutting the composite material strip carried on the outfeed conveying mechanism into the stack units.

[0019] In one of the embodiments, the cutting mechanism adopts a laser three-face ring cutting mode to cut the composite material strip carried on the outfeed conveying mechanism into the stack units and a continuous waste material strip.

[0020] In one of the embodiments, the device further comprises a tension control mechanism and a buffer mechanism between the composite mechanism and the outfeed conveying mechanism, the composite material strip is capable of passing through the tension control mechanism and the buffer mechanism, the tension control mechanism is capable of tensioning the composite material strip, and the buffer mechanism is capable of buffering or releasing the composite material strip.

[0021] A stack device, comprising:

[0022] The laminated cell processing device according to any one of the above preferred embodiments;

[0023] A first pole piece feeding device for providing first pole pieces to the feeding conveying mechanism, and the laminated cell processing device uses the first pole pieces to make laminated cells;

[0024] A second pole piece feeding device for providing second pole pieces, and the second pole pieces are opposite in polarity to the first pole pieces; and

[0025] A laminating device capable of alternately stacking the laminated cells and the second pole pieces to make an electric core.

[0026] In the laminated cell processing device and the laminating device, the pole pieces are conveyed from the feeding conveying mechanism to the compounding mechanism, and the feeding conveying mechanism makes the edge of at least one side of the pole pieces overhanging, so that the clamping member can smoothly clamp the pole pieces conveyed by the feeding conveying mechanism. After clamping the pole pieces, the clamping member is driven by the driving assembly to send the pole pieces into the compounding channel and insert the pole pieces between the two groups of diaphragm tapes. By driving the clamping member to move back and forth, the pole pieces can be sequentially sent between the two groups of diaphragm tapes in the form of inserting the pole pieces. Since the clamping and conveying mechanism can smoothly clamp and stably insert the pole pieces, the feeding accuracy of the pole pieces can be ensured. Therefore, the compounding accuracy of the diaphragm tapes and the pole pieces is high, so that the laminated cells in the compounding tapes also have high accuracy, thereby helping to improve the quality of the electric core. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] FIG. 1 is a structural schematic diagram of a laminating device in an embodiment of the present application;

[0029] FIG. 2 is a top view of a first pole piece feeding device in the laminating device shown in FIG. 1;

[0030] FIG. 3 is a front view of the first pole piece feeding device shown in FIG. 2;

[0031] FIG. 4 is a structural schematic diagram of a laminated cell processing device in the laminating device shown in FIG. 1;

[0032] FIG. 5 is a structural schematic diagram of a laminated cell prepared by the laminated cell processing device shown in FIG. 4. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more clear and understandable, the detailed description of the embodiments of the present application is made below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways from what is described herein, and with many different combinations of elements, and the present application is not limited to the embodiments described herein below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0039] Referring to FIG. 1, the present application provides a laminating device 10 and a laminating unit processing apparatus 300. The laminating device 10 includes a first electrode sheet feeding device 100, a second electrode sheet feeding device 200, the laminating unit processing apparatus 300 and a laminating device 400.

[0040] The first electrode sheet feeding device 100 and the second electrode sheet feeding device 200 are respectively used to provide first electrode sheets 21 and second electrode sheets, and the second electrode sheets are opposite in polarity to the first electrode sheets 21. For example, the first electrode sheets 21 are negative electrode sheets, and the second electrode sheets are positive electrode sheets. The laminating unit processing apparatus 300 can receive the first electrode sheets 21 provided by the first electrode sheet feeding device 100 and use the first electrode sheets 21 to make laminating units 40a (see FIG. 5), and the laminating units 40a include the first electrode sheets 21 and diaphragm sheet materials 31 attached to both sides of the first electrode sheets 21.

[0041] The laminating device 400 can alternately stack the laminating units 40a and the second electrode sheets to make battery cells. The laminating device 400 generally includes a laminating table and a laminating robot 410, and the laminating robot 410 can alternately place the laminating units 40a made by the laminating unit processing apparatus 300 and the second electrode sheets provided by the second electrode sheet feeding device 200 on the laminating table. In order to improve efficiency, the laminating device 400 generally has two laminating tables, and the stacking of the laminating units 40a and the second electrode sheets can be simultaneously performed on the two laminating tables, so that the pace of the laminating robot can be increased, and the feeding speeds of the second electrode sheet feeding device 200 and the laminating unit processing apparatus 300 can be matched.

[0042] The first electrode sheet feeding device 100 and the second electrode sheet feeding device 200 can have the same structure or different structures. The present application only specifically describes the structure of the first electrode sheet feeding device 100, and the structure of the second electrode sheet feeding device 200 can be referred to the first electrode sheet feeding device 100.

[0043] Referring to FIGS. 2 and 3, in the embodiment, the first electrode sheet feeding device 100 includes a traction mechanism 110, a first die-cutting mechanism 120 and a switching mechanism 130.

[0044] The traction mechanism 110 is capable of traction of the pole piece material strip 20 and conveying the pole piece material strip 20 to the first die-cutting mechanism 120. Specifically, the traction mechanism 110 in the embodiment adopts two clamping rollers to clamp the pole piece material strip 20, and one of the clamping rollers is a main drive roller. Under the drive of the main drive roller, the clamped pole piece material strip 20 can be conveyed to the downstream first die-cutting mechanism 120.

[0045] The first die-cutting mechanism 120 includes a first lower die 121 and a first upper die 122. The first upper die 122 is capable of lifting and pressing down relative to the first lower die 121, and the pole piece material strip 20 can enter between the first lower die 121 and the first upper die 122 under the conveying of the traction mechanism 110. Moreover, the first upper die 122 can cut the pole piece material strip 20 into a plurality of first pole pieces 21 each time it presses down.

[0046] The first lower die 121 or the first upper die 122 is pre-formed with a die-cutting plate of a required shape, and when the first upper die 122 presses down, the pole piece material strip 20 can be pressed and held on the first lower die 121 and cut into the first pole pieces 21 by the die-cutting plate. When the first upper die 122 lifts up, the first pole pieces 21 obtained by cutting are left on the surface of the first lower die 121.

[0047] Specifically, in the embodiment, the surface of the first lower die 121 is provided with suction holes (not shown in the figure) communicating with negative pressure cavities. The suction holes can form a negative pressure on the surface of the first lower die 121 to adsorb the first pole pieces 21 obtained by cutting, so as to avoid the first pole pieces 21 from adhering to the first upper die 122 and moving up with it. In addition, the waste, dust and the like generated by cutting can be sucked away through the suction holes, so as to avoid affecting the cutting precision due to the pollution of the die-cutting space.

[0048] In addition, in the embodiment, the first pole piece feeding device 100 further includes a second die-cutting mechanism 140, which is arranged upstream of the traction mechanism 110, and the pole piece material 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 the pole ear and the round corner on the edge of the pole piece material strip 20, and the first upper die 122 can cut the pole piece material strip 20 to obtain the first pole pieces 21 when it presses down.

[0049] The first tab sheet 21 molded by the first die-cutting mechanism 120 and the second die-cutting mechanism 140 twice includes at least one tab, and at least one of the corners is rounded. Preferably, all the four corners are rounded. The rounded corners make the first tab sheet 21 not have sharp corners, which can avoid piercing the separator in the subsequent process of stacking to prepare the battery cell, thereby improving the safety of the battery cell. Further, since the first tab sheet 21 is molded twice, and the tab and the rounded corner are processed by the second die-cutting mechanism 140, the die-cutting mechanism 120 only needs to cut the tab sheet strip 20 when die-cutting, so that the die structure of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 can be simplified compared with the die structure of the one-piece punching and molding, thereby helping to improve the precision of the first tab sheet 21 molding.

[0050] Moreover, since the degree of wear of the die is different when processing the tab and cutting the tab sheet strip 20. Therefore, if the one-piece punching and molding die is used to process the tab and cut the tab sheet strip 20 at the same time, it will cause uneven wear of the die, so that the whole die needs to be replaced. By using the first die-cutting mechanism 120 and the second die-cutting mechanism 140 to realize the cutting of the tab sheet strip 20 and the molding of the tab respectively, the dies of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 can realize uniform wear during use, thereby helping to prolong the service life of the die.

[0051] In addition, when the die of any one of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 is severely worn, it can be replaced or repaired alone, and the other can be used normally. Further, since the die structure of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 is simpler than that of the one-piece punching, and can be repaired separately, the difficulty of die repair can also be significantly reduced.

[0052] Specifically in the embodiment, the second die-cutting mechanism 140 includes two oppositely arranged second dies 141, and the two side edges of the tab sheet strip 20 in the width direction passing through the second die-cutting mechanism 140 can pass through the two second dies 141 respectively, and the distance between the two second dies 141 is adjustable.

[0053] The second die 141 is similar in structure to the first die-cutting mechanism 120, and also includes an upper die and a lower die. The two second dies 141 can die-cut the two edges in the width direction respectively, so as to process the tabs and / or rounded corners on the two edges. Specifically, one second die 141 in the embodiment is used to process the rounded corner on one side edge of the tab sheet strip 20, and the other second die 141 is used to process the rounded corner on the other side edge of the tab sheet strip 20 while processing the tab. Moreover, by adjusting the distance between the two second dies 141, the length of the finally molded first tab sheet 21 can be controlled, thereby ensuring the precision of the length dimension of the first tab sheet 21.

[0054] Further, in the embodiment, the first upper die 122 comprises a plurality of parallel and equally spaced cutters 1221, and the first upper die 122 is capable of cutting out one first pole piece 21 between any two adjacent cutters 1221.

[0055] For example, the first upper die 122 shown in FIG. 2 comprises three cutters 1221, and the first upper die 122 is capable of cutting out two first pole pieces 21 at one time. The cutters 1221 extend along the width direction of the pole piece tape 20, and are capable of forming a plurality of cuts extending along the width direction on the pole piece tape 20 when the first upper die 122 is pressed down, and the first pole pieces 21 are obtained between any two adjacent cuts. The distance between any two adjacent cuts (or the distance between any two adjacent cutters 1221) is equal to the width of the single first pole piece 21, and since the distance between any two adjacent cutters 1221 is determined when the first upper die 122 is pressed down each time, the consistency of the width of the plurality of first pole pieces 21 can be ensured.

[0056] Further, in the embodiment, the distance between the plurality of cutters 1221 is adjustable. Therefore, by adjusting the distance between the cutters 1221, the width of the finally formed first pole piece 21 can be controlled, so as to ensure the precision of the width of the first pole piece 21. Moreover, different widths of the first pole pieces 21 can be cut out by adjusting the distance between the cutters 1221, so that the first pole piece supply device 100 is applicable to processing different models of the first pole pieces 21.

[0057] The switching mechanism 130 comprises a discharge transfer assembly 131 and a discharge conveying assembly 132. The discharge transfer assembly 131 is capable of grabbing the first pole piece 21 on the first lower die 121 when the first upper die 122 is lifted up, and transferring the plurality of first pole pieces 21 obtained by one pressing down of the first upper die 122 to the discharge conveying assembly 132. The discharge transfer assembly 131 can be a mechanical hand with a suction cup at the end, a multi-axis moving platform or a multi-axis robot, etc., and the suction cup is capable of adsorbing the first pole piece 21. The discharge conveying assembly 132 can be a vacuum belt, which is capable of adsorbing the received first pole piece 21 and conveying it downstream.

[0058] The discharge transfer assembly 131 can be avoided when the first upper die 122 is lifted up, so that the discharge transfer assembly 131 can transfer the first pole piece 21 on the first lower die 121 to the discharge conveying assembly 132 in the gap when the first upper die 122 is lifted up. Therefore, the first lower die 121 can remain fixed in position, and the first upper die 122 can press down and lift up alternately according to the preset frequency, so as to cut the pole piece tape 20 into the first pole pieces 21 one by one, thereby significantly improving the piece-making rhythm. Moreover, since the first upper die 122 is capable of cutting out a plurality of first pole pieces 21 at one time, a larger number of first pole pieces 21 can be made in unit time.

[0059] In the embodiment, the first die-cutting mechanism 120 is provided with an adapter mechanism 130 on each side, and the two discharge transfer assemblies 131 of the adapter mechanisms 130 on the two sides can alternately grab the first pole pieces 21 on the first lower die 121.

[0060] Since a single pressing of the first upper die 122 can cut a plurality of first pole pieces 21, a single discharge transfer assembly 131 may

[0061] Alternatively, a single discharge transfer assembly 131 can grab a plurality of first pole pieces 21 at the same time. After one of the discharge transfer assemblies 131 removes the plurality of first pole pieces 21 obtained by a single pressing of the first upper die 122 from the first lower die 121, the next pressing of the first upper die 122 can be performed without waiting for the discharge transfer assembly 131 to return to the first upper die 122, and a plurality of first pole pieces 21 can be obtained. At this time, the plurality of first pole pieces 21 obtained by the next pressing can be transferred by the other discharge transfer assembly 131. Such a cycle also helps to further improve the rhythm of the first die-cutting mechanism 120.

[0062] In addition, in the embodiment, the adapter mechanism 130 further includes a visual detection assembly 133, a variable-distance transfer assembly 134, a positioning platform 135, and a discharging transfer assembly 136. The visual detection assembly 133 is used to obtain image information of the first pole pieces 21 on the discharge conveying assembly 132. The variable-distance transfer assembly 134 is used to transfer the first pole pieces 21 on the discharge conveying assembly 132 to the positioning platform 135 and increase the distance between adjacent two first pole pieces 21. The discharging transfer assembly 136 is used to grab the first pole pieces 21 on the positioning platform 135 and discharge them.

[0063] The visual detection assembly 133 can be a CCD camera, which can be arranged above the discharge conveying assembly 132. The first pole pieces 21 conveyed by the discharge conveying assembly 132 can pass through the detection range of the visual detection assembly 133 in turn. By comparing the image information obtained by the visual detection assembly 133 with reference information, it can be determined whether the first pole pieces 21 have defects.

[0064] A vision module (not shown) is arranged above the positioning platform 135, which can obtain the position information of the first pole piece 21 on the positioning platform 135. The positioning platform 135 can position and correct the first pole piece 21 according to the position information provided by the vision module, so as to ensure that the unloading transfer assembly 136 can successfully grab the first pole piece 21 on the positioning platform 135. Specifically, the positioning platform 135 can drive the first pole piece 21 carried thereby to translate in at least two directions and rotate, so as to achieve the purpose of positioning and correction.

[0065] The variable-distance transfer assembly 134 can grab a plurality of first pole pieces 21 at a time, and place the plurality of first pole pieces 21 after the distance between the plurality of first pole pieces 21 is pulled apart. Generally, the number of first pole pieces 21 grabbed by the variable-distance transfer assembly 134 at a time is equal to the number of first pole pieces 21 obtained by the first upper die 122 each time. 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, so as to ensure that the vision module above the positioning platform 135 can accurately obtain the position information of the first pole piece 21.

[0066] The unloading transfer assembly 136 can be a multi-axis robot, the end of which is provided with a suction cup for sucking the first pole piece 21. After the unloading transfer assembly 136 grabs the first pole piece 21, the unloading transfer assembly 136 can unload the first pole piece 21 to a specified position according to the detection structure of the vision detection assembly 133.

[0067] Further, in the embodiment, the first pole piece feeding device 100 further comprises an unloading conveying mechanism 150 and an NG bin 160, and the unloading transfer assembly 136 can unload the first pole piece 21 grabbed from the positioning platform 135 to the unloading conveying mechanism 150 or the NG bin 160.

[0068] The unloading conveying mechanism 150 can also be a vacuum belt, which can adsorb the first pole piece 21 received thereby. Specifically, for the first pole piece 21 that passes the detection, the unloading transfer assembly 136 unloads the first pole piece 21 to the unloading conveying mechanism 150, and the unloading conveying mechanism 150 conveys the first pole piece 21 to the lamination unit processing device 300. For the first pole piece 21 that fails the detection, the unloading transfer assembly 136 unloads the first pole piece 21 to the NG bin 160 for scrap processing.

[0069] Referring to FIG. 4, the lamination unit processing device 300 in an embodiment of the present application comprises a composite mechanism 310, a diaphragm feeding mechanism 320, a feeding conveying mechanism 330, and a pinch mechanism 340.

[0070] The composite mechanism 310 is formed with a composite channel; the diaphragm feeding mechanism 320 is used for feeding two groups of diaphragm material strips 30 to the composite mechanism 310, and the two groups of diaphragm material strips 30 can enter the composite channel; the feeding conveying mechanism 330 is used for conveying the pole piece, specifically the first pole piece 21. Obviously, in other embodiments, if the second pole piece is used to prepare the laminated piece unit 40a, then the pole piece is the second pole piece. The pinch mechanism 340 can pinch the first pole piece 21 conveyed by the feeding conveying mechanism 330 to feed the first pole piece 21 into the composite channel and insert the first pole piece 21 between the two groups of diaphragm material strips 30. The composite mechanism 310 can composite the two groups of diaphragm material strips 30 and the first pole piece 21 entering the composite channel into a composite material strip 40, and the composite material strip 40 includes two layers of diaphragm material strips 30 and a plurality of first pole pieces 21 clamped between the two layers of diaphragm material strips 30 and arranged at intervals. It can be seen that the composite material strip 40 obtained by compounding contains a plurality of laminated piece units 40a.

[0071] Specifically, in the embodiment, the composite mechanism 310 includes two groups of hot-pressing rollers 311 arranged oppositely, and the composite channel is formed between the two groups of hot-pressing rollers 311. The two groups of diaphragm material strips 30 and the first pole piece 21 entering the composite channel are extruded by the two groups of hot-pressing rollers 311 to realize compounding, and the compounding effect is good.

[0072] In addition, the diaphragm feeding mechanism 320 is generally provided with two, and the two diaphragm feeding mechanisms 320 are respectively located on the two sides of the composite mechanism 310 and respectively provide the diaphragm material strip 30 to the composite mechanism 310. Specifically, in the embodiment, the diaphragm feeding mechanism 320 includes a unwinding assembly 321 and a deviation rectifying assembly 322, and the diaphragm material strip 30 unwound by the unwinding assembly 321 passes through the deviation rectifying assembly 322 to enter the composite channel.

[0073] The deviation rectifying assembly 322 can adjust the angle and direction of the diaphragm material strip 30 entering the composite channel, so as to ensure that the two groups of diaphragm material strips 30 are aligned with each other, and also effectively aligned with the first pole piece 21 entering the composite channel, thereby ensuring the precision of the composite material strip 20 obtained by compounding. Obviously, in order to ensure that the diaphragm material strip 30 is continuously unwound smoothly, each diaphragm feeding mechanism 320 generally also includes an automatic tape connecting assembly, a tension control assembly, a diaphragm dust removal assembly, etc.

[0074] The feeding conveying mechanism 330 can receive the first pole piece 21 prepared by the first pole piece feeding device 100. That is, the feeding conveying mechanism 330 can continue to convey the first pole piece 21 conveyed by the feeding conveying mechanism 330 to the composite mechanism 310. Wherein, the feeding conveying mechanism 330 can make the edge of at least one side of the conveyed first pole piece 21 suspended. The edge of the first pole piece 21 is suspended, which means that the lower side of the edge is not in contact with the feeding conveying mechanism 330, so that the both sides of the edge of the first pole piece 21 are exposed. In this way, the feeding conveying mechanism 330 can conveniently pinch the first pole piece 21 conveyed by the feeding conveying mechanism 330.

[0075] Specifically, the first pole piece 21 is horizontally placed on the feeding conveying mechanism 330, i.e. the length direction of the first pole piece 21 is perpendicular to the conveying direction, and the feeding conveying mechanism 330 can make the edge of the length direction of the first pole piece 21 overhanging. Therefore, the pinch conveying mechanism 340 can convey the first pole piece 21 into the composite channel without rotating the first pole piece 21 after clamping the first pole piece 21.

[0076] In the embodiment, the feeding 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, and 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 overhanging.

[0077] The first pole piece 21 produced by the first pole piece feeding device 100 can be sequentially carried by the plurality of adsorption blocks 332, and the width of the adsorption blocks 332 can be set to be smaller than the length of the first pole piece 21, so as to make the edge of the first pole piece 21 overhanging. Moreover, the adsorption blocks 332 can be communicated with a vacuum cavity (not shown in the figure) and can adsorb the first pole piece 21 by negative pressure, so as to ensure that the first pole piece 21 is smoothly conveyed to a position that can be clamped by the pinch conveying mechanism 340.

[0078] The pinch conveying mechanism 340 includes a driving assembly 341 and a clamping piece 342, and the clamping piece 342 can reciprocally move under the driving of the driving assembly 341 to clamp the pole piece carried on the feeding conveying mechanism 330 and convey the clamped pole piece into the composite channel and insert it between the two groups of diaphragm material belts 30. The clamping piece 342 can be formed by two oppositely arranged clamping plates that can approach and move away from each other, and can better clamp the overhanging edge of the first pole piece 21. The driving assembly 341 can drive the clamping piece 342 to move between the feeding conveying mechanism 330 and the composite mechanism 310, and the clamping piece 342 clamps the first pole piece 21 when approaching the feeding conveying mechanism 330 and inserts the first pole piece 21 into the composite channel when approaching the composite mechanism 310, so as to ensure that the beat of the continuous incoming of the first pole piece feeding device 100 and the beat of the intermittent feeding of the first pole piece 21 are effectively matched.

[0079] By driving the clamping piece 342 to reciprocally move, the first pole piece 21 can be sequentially conveyed into the two groups of diaphragm material belts 30 in the form of inserting a piece. Since the pinch conveying mechanism 340 can smoothly clamp and stably insert the first pole piece 21, the feeding precision of the first pole piece 21 can be ensured. Therefore, the precision of the composite of the diaphragm material belt 30 and the first pole piece 21 is high.

[0080] In the embodiment, the composite mechanism 310 further comprises two sets of feeding rollers 312 located upstream of the composite channel, the diameters of the feeding rollers 312 are smaller than that of the hot pressing roller 311, and the two sets of feeding rollers 312 are oppositely arranged and form a feeding channel, the first pole piece 21 and the two sets of diaphragm material belts 30 are fed into the composite channel through the feeding channel.

[0081] When the first pole piece 21 is inserted, the clamping member 342 first inserts the first pole piece 21 between the two feeding rollers 312, and then inserts the first pole piece 21 into the composite channel through the feeding rollers 312. Since the diameters of the feeding rollers 312 are smaller than that of the hot pressing roller 311, the feeding rollers 312 occupy less space, so that a larger operation space upstream of the composite channel is reserved for the clamping member 342 to move. Moreover, the feeding rollers 312 with smaller diameters can more reliably clamp the first pole piece 21 than the hot pressing roller 311, so that even if the size of the first pole piece 21 is small, the first pole piece 21 can be smoothly guided into the composite channel by the two feeding rollers 312.

[0082] In the 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, the driving assembly 341 can correct the deviation of the first pole piece 21 clamped by the clamping member 342 by driving the clamping member 342 to move, so as to ensure that the first pole piece 21 can be aligned with the diaphragm material belts 30 on both sides when entering the composite channel.

[0083] In addition, in the embodiment, the lamination unit processing device 300 further comprises a first visual detection mechanism 361 and a second visual detection mechanism 362, the first visual detection mechanism 361 is used to acquire image information and position information of the first pole piece 21 on the feeding conveying mechanism 330, and the second visual detection mechanism 362 is used to acquire image information of the composite material belt 40.

[0084] The first visual detection mechanism 361 and the second visual detection mechanism 362 can both adopt a CCD camera. The first visual detection mechanism 361 can detect the outer size and surface defects of the first pole piece 21 by acquiring the image information of the first pole piece 21, so as to screen out NG pole pieces and feed back to the subsequent process, to facilitate the rejection of the NG pole pieces. Specifically, the NG pole pieces can be rejected before or after the lamination. In order to ensure the constant beat of the equipment, the NG pole pieces in the embodiment are rejected after the lamination.

[0085] The first visual detection mechanism 361 can also acquire the position information of the first pole piece 21, which refers to the relative position of the first pole piece 21 on the feeding conveying mechanism 330. More specifically, the first visual detection mechanism 361 can feed back the acquired position information to the driving assembly 341, so as to facilitate the driving assembly 341 to drive the clamping member 342 to correct the deviation of the first pole piece 21.

[0086] According to the image information of the composite material tape 40 acquired by the second visual inspection mechanism 362, the relative positions of the two groups of diaphragm material tapes 30 and the first pole piece 21 can be obtained, so as to detect whether the diaphragm material tape 30 and the first pole piece 21 in the composite material tape 40 are aligned. If there is a deviation, the deviation information can also be fed back to the deviation correction assembly 322, and the deviation correction assembly 322 can accurately adjust the angle and direction of the diaphragm material tape 30 entering the composite channel, so as to further ensure the composite accuracy.

[0087] In the embodiment, the lamination unit processing device further comprises a cutting mechanism 350. The cutting mechanism 350 can cut the composite material tape 40 into a plurality of lamination units 40a, and each lamination unit 40a comprises one first pole piece 21 and a diaphragm piece material 31 attached to the first two sides. Specifically, the diaphragm material tape 30 is cut into a sheet to obtain the diaphragm piece material 31. The cutting mechanism 350 can cut the composite material tape 40 by means of blade cutting, laser cutting, etc.

[0088] Specifically, in the embodiment, the cutting mechanism 350 can cut the composite material tape 40 into lamination units 40a and a continuous waste material tape 40b, and the lamination unit processing device 300 further comprises a waste material winding mechanism 370 for winding the waste material tape 40b.

[0089] That is, when the cutting mechanism 350 cuts the composite material tape 40, it does not cut off the diaphragm material tape 30, but only cuts the lamination unit 40a from the original composite material tape 40, and the remaining part forms a continuous waste material tape 40b. The waste material tape 40b can be wound by the waste material winding mechanism 370, which is more convenient for collecting waste.

[0090] It should be noted that for the first pole piece 21 determined as an NG pole piece in the previous step, the cutting mechanism 350 does not cut it from the composite material tape 40 when cutting the composite material tape 40, but leaves it on the waste material tape 40b for rejection, avoiding the NG pole piece entering the subsequent lamination process.

[0091] In addition, in the embodiment, the lamination unit processing device 300 further comprises an output conveying mechanism 380. The composite material tape 40 output by the composite mechanism 310 is carried on the output conveying mechanism 380 and conveyed downstream by the output conveying mechanism 380, and the cutting mechanism 350 can cut the composite material tape 40 carried on the output conveying mechanism 380 into lamination units 40a.

[0092] The discharge conveying mechanism 380 can adopt a vacuum belt, which can better adsorb and fix the composite material belt 40. Since the cutting mechanism 350 can cut the composite material belt 40 during the continuous conveying of the discharge conveying mechanism 380, the composite material belt 40 can always maintain the belt running, thereby ensuring the continuity and stability of the processing process. The cutting obtained laminated core unit 40a is left on the discharge conveying mechanism 380 and continues to be conveyed downstream.

[0093] More specifically, in the present embodiment, the cutting mechanism 350 adopts a laser three-face ring cutting mode to cut the composite material belt 40 carried on the discharge conveying mechanism 380 into laminated core units 40a and continuous waste material belts 40b.

[0094] Specifically, the light spot emitted by the cutting mechanism 350 can move along a path in the shape of a circle, thereby sequentially cutting a plurality of laminated core units 40a from the composite material belt 40 and leaving waste material belts 40b. The above cutting mode is more efficient, and each laminated core unit 40a obtained has three edges cut, so the size accuracy of the laminated core unit 40a can also be ensured.

[0095] Further, in the present embodiment, the laminated core unit processing device 300 further comprises a tension control mechanism 391 and a buffer mechanism 392 between the compounding mechanism 310 and the discharge conveying mechanism 380, and the composite material belt 40 can pass through the tension control mechanism 391 and the buffer mechanism 392. The tension control mechanism 391 can tension the composite material belt 40, and the buffer mechanism 392 can buffer or release the composite material belt 40.

[0096] The tension control mechanism 391 and the buffer mechanism 392 can maintain the tension of the composite material belt 40 stable, thereby ensuring that the composite material belt 40 can be smoothly conveyed downstream. Moreover, when the speed of the discharge conveying mechanism 380 fluctuates, or when the composite material belt 40 is stopped or pulled during the cutting of the composite material belt 40 by the cutting mechanism 350, the buffer mechanism 392 can buffer or release the material belt 40 to compensate, thereby ensuring that the composite material belt 40 can always maintain a tensioned state without breaking.

[0097] In addition, the laminated core unit processing device 300 generally further comprises a conveying mechanism 393 on the downstream side of the discharge conveying mechanism 380, and the conveying mechanism 393 can adopt a mechanical hand with a suction cup. The conveying mechanism 393 can timely transfer the laminated core unit 40a conveyed along the discharge conveying mechanism 380 to the laminating device 400.

[0098] ​The above lamination unit processing device 300 and lamination device 10, the pole piece is transported to the composite mechanism 310 by the feeding transport mechanism 330, and because the feeding transport mechanism 330 makes the edge of at least one side of the pole piece suspended, so that the clamp 342 can smoothly clamp the pole piece transported by the feeding transport mechanism 330. After clamping the pole piece, the clamp 342 will be driven by the driving assembly 341 to send the pole piece into the composite channel and insert between the two groups of diaphragm material strips 30. By driving the clamp 342 to move back and forth, the pole piece can be sent into the two groups of diaphragm material strips 30 in the form of inserting a piece. Because the clamp and feed mechanism 340 can smoothly clamp and stably insert the pole piece, the feeding accuracy of the pole piece can be guaranteed. Therefore, the precision of the composite of the diaphragm material strip 30 and the pole piece is high, so the lamination unit 40a in the composite material strip 40 also has high precision, thereby helping to improve the quality of the battery cell.

[0099] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0100] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A lamination unit processing apparatus characterized by comprising: The laminated body processing device comprises: a laminating mechanism, which is provided with a laminating channel; a diaphragm feeding mechanism, which is configured to feed two groups of diaphragm tapes to the laminating mechanism; a feeding conveying mechanism, which is configured to convey the pole piece and suspend the edge of at least one side of the conveyed pole piece; a pinch mechanism, which comprises a driving assembly and a clamping piece, the clamping piece is capable of reciprocating under the driving of the driving assembly to clamp the pole piece carried by the feeding conveying mechanism and to feed the clamped pole piece into the laminating channel and between the two groups of diaphragm tapes, and the laminating mechanism is capable of laminating the two groups of diaphragm tapes and the pole piece entering the laminating channel into a laminated tape comprising a plurality of stacked cell units. The laminating mechanism comprises two groups of opposing hot-pressing rollers, and the laminating channel is formed between the two groups of hot-pressing rollers.

2. The lamination unit processing apparatus according to claim 1, characterized by The laminating mechanism further comprises two groups of feeding rollers located upstream of the laminating channel, the diameters of the feeding rollers are smaller than the diameters of the hot-pressing rollers, and the two groups of feeding rollers are oppositely arranged and form a feeding channel, and the pole piece and the two groups of diaphragm tapes are fed into the laminating channel through the feeding channel.

3. The lamination unit processing apparatus according to claim 2, characterized by The diaphragm feeding mechanism comprises a unwinding assembly and a deviation rectifying assembly, the diaphragm tape unwound by the unwinding assembly passes through the deviation rectifying assembly and enters the laminating channel.

4. The lamination unit processing apparatus of claim 1, wherein The feeding conveying mechanism comprises 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 configured to carry and adsorb the pole piece and suspend the edge of at least one side of the carried pole piece.

5. The lamination unit processing apparatus of claim 1, wherein The driving assembly is capable of driving the clamping piece to translate in two directions parallel to the carrying surface of the adsorption blocks and perpendicular to each other.

6. The lamination unit processing apparatus according to claim 5, wherein Further comprising a first visual detection mechanism and a second visual detection mechanism, the first visual detection mechanism is configured to acquire the image information and position information of the pole piece on the feeding conveying mechanism, and the second visual detection mechanism is configured to acquire the image information of the laminated tape.

7. The lamination unit processing apparatus of claim 1, wherein Further comprising a cutting mechanism, the cutting mechanism is capable of cutting the laminated tape into a plurality of stacked cell units, and each of the stacked cell units comprises one pole piece and diaphragm pieces attached to both sides of the pole piece.

8. The lamination unit processing apparatus of claim 1, wherein The cutting mechanism is capable of cutting the laminated tape into the stacked cell units and a continuous waste tape, and the stacked cell unit processing device further comprises a waste rewinding mechanism, the waste rewinding mechanism is configured to rewind the waste tape.

9. The lamination unit processing apparatus of claim 8, wherein Further comprising a discharge conveying mechanism, the laminated tape output by the laminating mechanism is carried on the discharge conveying mechanism and conveyed downstream by the discharge conveying mechanism, and the cutting mechanism is capable of cutting the laminated tape carried on the discharge conveying mechanism into the stacked cell units.

10. The lamination unit processing apparatus of claim 8, wherein The cutting mechanism cuts the laminated tape carried on the discharge conveying mechanism into the stacked cell units and a continuous waste tape in a laser three-face ring cutting manner.

11. The lamination unit processing apparatus of claim 10, wherein Further comprising a tension control mechanism and a buffer mechanism located between the laminating mechanism and the discharge conveying mechanism, the laminated tape is capable of winding through the tension control mechanism and the buffer mechanism, the tension control mechanism is capable of tensioning the laminated tape, and the buffer mechanism is capable of buffering or releasing the laminated tape.

12. The lamination unit processing apparatus of claim 10, wherein, The laminated body processing device comprises:

13. A lamination apparatus characterized by, the stacked cell unit processing device according to any one of claims 1 to 12. ​ A first electrode tab feeding device is configured to provide first electrode tabs to the feeding mechanism, and the lamination unit processing device uses the first electrode tabs to make the lamination unit; A second electrode tab feeding device is configured to provide second electrode tabs, and the second electrode tabs are opposite in polarity to the first electrode tabs; and A lamination device is capable of alternately stacking the lamination unit and the second electrode tabs to make the battery cell. The first electrode tab feeding device comprises:

14. The lamination apparatus of claim 13, wherein, A traction mechanism configured to pull the electrode tab material strip; A first die-cutting mechanism comprising a first lower die and a first upper die, the first upper die is capable of being lifted and pressed down relative to the first lower die, the electrode tab material strip is capable of being pulled into the first lower die and the first upper die by the traction mechanism, and the first upper die is capable of cutting the electrode tab material strip into a plurality of first electrode tabs each time it is pressed down; and An adapter mechanism comprising a material transfer assembly and a material feeding assembly, the material transfer assembly is capable of grabbing the first electrode tabs on the first lower die when the first upper die is lifted, and transferring the plurality of first electrode tabs obtained by one pressing down of the first upper die to the material feeding assembly. The first electrode tab feeding device further comprises a second die-cutting mechanism, the second die-cutting mechanism is arranged upstream of the traction mechanism, the electrode tab material strip is capable of passing through the second die-cutting mechanism under the traction of the traction mechanism, the second die-cutting mechanism is capable of processing tabs and fillets on the edges of the electrode tab material strip, and the first upper die is capable of cutting the electrode tab material strip to obtain the first electrode tabs.

15. The lamination apparatus of claim 14, wherein, The second die-cutting mechanism comprises two oppositely arranged second dies, the two side edges of the electrode tab material strip passing through the second die-cutting mechanism in the width direction are capable of passing through the two second dies respectively, and the distance between the two second dies is adjustable.

16. The lamination apparatus of claim 15, wherein, The surface of the first lower die is provided with suction holes communicating with negative pressure cavities.

17. The lamination apparatus of claim 14, wherein, The adapter mechanism is arranged on the opposite sides of the first die-cutting mechanism respectively, and the material transfer assemblies of the adapter mechanisms on the two sides are capable of alternately grabbing the first electrode tabs on the first lower die.

18. The lamination apparatus of claim 14, wherein, The adapter mechanism further comprises a variable-distance transfer assembly, a positioning platform, and a material discharge transfer assembly, the variable-distance transfer assembly is configured to transfer the first electrode tabs on the material feeding assembly to the positioning platform and increase the distance between adjacent two first electrode tabs, and the material discharge transfer assembly is configured to grab the first electrode tabs on the positioning platform and discharge the first electrode tabs.

19. The lamination apparatus of claim 14, wherein, The lamination device comprises two lamination tables and a lamination robot, the lamination robot is capable of alternately placing the lamination unit and the second electrode tabs on any of the lamination tables.

20. The lamination apparatus of claim 13, wherein, ​

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