CN221080082U - Cutting and stacking equipment - Google Patents

Abstract

The application relates to a cutting and stacking device which comprises a conveying mechanism, a cutting mechanism, a V-angle cutting mechanism, a cutting mechanism and a lamination device, wherein the conveying mechanism is used for conveying a pole piece material belt to sequentially pass through a pole piece cutting position, a V-angle cutting position, a die cutting position and a lamination position; the cutting mechanism is used for facing the pole piece material belt positioned at the pole lug cutting position so as to cut the pole lug on the pole piece material belt to form a pole lug; the V-angle cutting mechanism faces the pole piece material belt positioned at the V-angle cutting position so as to cut off sharp corners of the pole piece material belt; the cutting mechanism is used for cutting the pole piece material belt passing through the die cutting position to form separated pole pieces; the lamination device is used for folding the tabs at the lamination position to form a semi-finished product cell. The device can process the coated pole piece material belt into the battery cell through the cutting and stacking equipment, and compared with the processing mode in the traditional technology, the device omits the feeding and discharging time between the processes, thereby improving the processing efficiency.

Description

Cutting and stacking equipment

Technical Field

The application relates to the technical field of cell production, in particular to a cutting and stacking device.

Background

With the development of new energy industry, the demand of batteries is also increasing. The production process of the battery cell in the conventional technology generally comprises coating, slitting, cutting tabs, die-cutting pole pieces, lamination and the like.

However, the processes in the conventional technology are usually performed separately, which results in low production efficiency of the battery cell, and needs to be solved.

Disclosure of utility model

Based on the above, it is necessary to provide a stacking apparatus for solving the problem of low production efficiency of the battery cells.

A stacking apparatus, the stacking apparatus comprising:

The conveying mechanism is used for conveying the pole piece material belt to sequentially pass through the pole lug cutting position, the V angle cutting position, the die cutting position and the lamination position;

The cutting mechanism is used for facing the pole piece material belt positioned at the pole cutting lug position so as to cut the pole piece material belt to form a pole lug;

The V-angle cutting mechanism faces the pole piece material belt positioned at the V-angle cutting position so as to cut off the sharp angle of the pole piece material belt;

the cutting mechanism is used for cutting the pole piece material belt passing through the die cutting position to form separated pole pieces; and

And the lamination device is used for folding the tabs at the lamination positions to form a semi-finished product cell.

In one embodiment, the cutting and stacking device further comprises a base frame, and the cutting mechanism comprises a laser for emitting laser to the tab position, and the laser is adjustably arranged on the base frame.

In one embodiment, the cutting mechanism further comprises:

The first displacement assembly comprises a first sliding rail extending along a first direction and a first sliding table in sliding fit with the first sliding rail, and the laser is arranged on the first sliding table so as to move along the first sliding table along the first direction towards or away from the tab cutting position;

The second displacement assembly comprises a second sliding rail extending along a second direction and a second sliding table in sliding fit with the second sliding rail, and the first sliding rail is arranged on the second sliding table so as to move along the second direction along with the second sliding table;

The conveying mechanism is used for driving the pole piece material belt to pass through the pole cutting lug position along a third direction, and the first direction, the second direction and the third direction are intersected in pairs.

In one embodiment, the stacking cutting device further comprises a blowing mechanism, wherein an air outlet of the blowing mechanism faces the tab cutting position so as to form positive pressure at the tab cutting position to blow off dust on the pole piece material belt; and/or

The cutting and stacking equipment further comprises a dust collection mechanism, wherein a suction port of the dust collection mechanism faces the tab cutting position, so that negative pressure is formed at the tab cutting position to absorb dust on the pole piece material belt.

In one embodiment, the base frame comprises a support, the support is provided with a containing cavity, the containing cavity is used for containing the pole piece material belt positioned at the tab cutting position, the support is provided with an opening for laser penetration of the laser, and the air outlet and the suction port are communicated with the containing cavity.

In one embodiment, the conveying mechanism further comprises a buffer mechanism, the buffer mechanism is arranged between the tab cutting position and the V-shaped cutting angle position, the buffer mechanism comprises a fixed roller and a regulating roller, the fixed roller and the regulating roller are both used for winding the pole piece material belt so as to change the conveying direction of the pole piece material belt, the regulating roller is movably arranged on the base frame, and the regulating roller is used for changing the length of the pole piece material belt between the fixed roller and the regulating roller when moving relative to the fixed roller.

In one embodiment, the fixed rollers are arranged at intervals along a reference axis, the regulating rollers are arranged at intervals with the reference axis, and projections of the regulating rollers on the reference axis are alternately arranged with the fixed rollers one by one on the reference axis so as to enable the pole piece material belt to be alternately wound on the regulating rollers and the fixed rollers.

In one embodiment, the conveying mechanism comprises a first driving roller and a second driving roller which are both rotatably arranged on the base frame, the first driving roller and the second driving roller are both used for enabling the pole piece material belt to be wound, and on a path of conveying the pole piece material belt by the conveying mechanism, the first driving roller is positioned between the pole cutting lug position and the V-shaped cutting angle position so as to pull the pole piece material belt to pass through the pole cutting lug position; the second driving roller is positioned between the V-cutting angle position and the die cutting position to pull the pole piece material belt to pass through the V-cutting angle position.

In one embodiment, the conveying mechanism further comprises a conveying belt and a negative pressure generator, wherein the conveying belt is provided with a plurality of adsorption holes, and the negative pressure generator is communicated with the adsorption holes so as to form negative pressure in the adsorption holes and be used for adsorbing the pole pieces on the conveying belt.

In one embodiment, the conveying mechanism, the cutting mechanism, the V-angle cutting mechanism and the cutting mechanism are denoted as pole piece preparation devices, the pole piece preparation devices are at least two sets, and the at least two sets of pole piece preparation devices are respectively arranged on two opposite sides of the base frame so as to be respectively used for processing the positive pole piece and the negative pole piece.

In the above-mentioned cutting and stacking equipment, can carry the pole piece material area after accomplishing the coating to cutting tab position, cut V angle position, cross cutting position and lamination position in proper order through conveying mechanism. When the pole piece material belt is positioned at the pole lug cutting position, the pole lug can be formed by cutting on the pole piece material belt through the cutting mechanism. When the pole piece material belt is positioned at the V-angle cutting position, the sharp angle of the pole piece material belt can be cut off through the V-angle cutting mechanism, so that the probability of the pole piece to puncture the diaphragm is reduced. When the pole piece material belt is in the die cutting position, the cutting mechanism can cut the pole piece material belt to form separated pole pieces, so that the lamination device can laminate the pole pieces positioned in the lamination position to form an electric core. The device can process the coated pole piece material belt into the battery cell through the cutting and stacking equipment, and compared with the processing mode in the traditional technology, the device omits the feeding and discharging time between the processes, thereby improving the processing efficiency.

Meanwhile, the feeding machine is not required to be repeated for discharging when the cell is processed by the cutting and stacking equipment, so that feeding errors, discharging errors and accumulated errors of various different equipment can be reduced, and the yield of the manufactured cell is relatively improved.

Drawings

Fig. 1 is a top view of a stacking apparatus according to an embodiment of the present application.

Fig. 2 is an isometric view of other structures than the lamination device in the slitting device of fig. 1.

Fig. 3 is a front view of the folding apparatus shown in fig. 2.

Fig. 4 is an enlarged view of a portion of the stacking apparatus shown in fig. 3 at a.

Fig. 5 is a partial enlarged view of a portion B of the stacking apparatus shown in fig. 2.

Fig. 6 is an enlarged view of a portion of the stacking apparatus shown in fig. 4 at C.

Fig. 7 is a partial enlarged view of the stacking apparatus shown in fig. 2 at D.

Fig. 8 is an enlarged view of a portion at E of the stacking apparatus shown in fig. 2.

Fig. 9 is an enlarged view of a portion at F in the stacking apparatus shown in fig. 4.

Reference numerals: 10. a cutting and stacking device; 10a, a positive pole piece preparation device; 10b, a negative electrode piece preparation device; 11. cutting the tab position; 12. cutting the V-shaped angle; 13. die cutting; 14. lamination positions; 15. detecting a position; 100. a conveying mechanism; 110. a first driving roller; 120. a second driving roller; 130. a buffer mechanism; 131. a fixed roller; 132. an adjusting roller; 133. a connecting frame; 140. a conveyor belt; 141. adsorption holes; 200. a cutting mechanism; 210. a laser; 220. a first displacement assembly; 221. a first slide rail; 222. a first sliding table; 230. a second displacement assembly; 231. a second slide rail; 232. a second sliding table; 233. a second driving member; 300. v-angle cutting mechanism; 400. a cutting mechanism; 500. lamination device; 600. a base frame; 610. a bracket; 620. a reel is unreeled; 630. a support roller; 640. a guide rail; 710. a dust collection mechanism; 720. a tension control mechanism; 721. a swing frame; 722. a tension roller; 730. a deviation correcting mechanism; 740. a detection mechanism; 20. pole piece material rolls; 21. a pole piece material belt; 22. a pole piece; o, reference axis.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these 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., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, fig. 1 is a top view of a stacking apparatus according to an embodiment of the present application, and fig. 2 is an axial schematic view of other structures than a lamination device in the stacking apparatus shown in fig. 1. The cutting and stacking device 10 provided by an embodiment of the present application includes a conveying mechanism 100, a cutting mechanism 200, a V-angle cutting mechanism 300, a cutting mechanism 400, and a stacking device 500, where the conveying mechanism 100 is used for conveying a pole piece material belt 21 to sequentially pass through a tab cutting position 11, a V-angle cutting position 12, a die cutting position 13, and a stacking position 14. The cutting mechanism 200 is used for facing the pole piece material belt 21 positioned at the pole tab cutting position 11 so as to cut the pole tab on the pole piece material belt 21 to form a pole tab. The V-angle cutting mechanism 300 is oriented to cut the pole piece strip 21 at the V-angle position 12 to cut off sharp corners of the pole piece strip 21. The cutting mechanism 400 is used for cutting the pole piece material strip 21 passing through the die cutting position 13 to form the separated pole pieces 22. Lamination assembly 500 is used to fold the tabs at lamination station 14 to form a half-finished cell.

In the above-described stacking apparatus 10, the coated pole piece material tape 21 can be sequentially conveyed to the tab cutting position 11, the V-angle cutting position 12, the die cutting position 13, and the lamination position 14 by the conveying mechanism 100. When the pole piece material belt 21 is positioned at the pole lug cutting position 11, the pole lug can be formed by cutting on the pole piece material belt 21 through the cutting mechanism 200. When the pole piece material belt 21 is positioned at the V-shaped cutting position 12, the sharp angle of the pole piece material belt 21 can be cut off through the V-shaped cutting mechanism 300, the probability that the pole piece 22 punctures a diaphragm is reduced, and the yield of the battery cell is improved. When the pole piece material belt 21 is positioned at the die cutting position 13, the cutting mechanism 400 can cut the pole piece material belt 21 to form the separated pole pieces 22, so that the lamination device 500 can laminate the pole pieces 22 positioned at the lamination position 14 to form an electric core. By the arrangement, the coated pole piece material belt 21 can be processed to form the battery core through the cutting and stacking equipment 10, and compared with the processing mode in the prior art, the feeding time and the discharging time during switching among the processes are saved, so that the processing efficiency is improved.

Meanwhile, since the stacking device 10 does not need to repeatedly feed and discharge when processing the battery cells, feeding errors, discharging errors and accumulated errors among various different devices can be reduced, so that the yield of the manufactured battery cells is relatively improved.

With continued reference to fig. 1 and 2, in one embodiment, the conveying mechanism 100, the cutting mechanism 200, the V-angle cutting mechanism 300, and the cutting mechanism 400 are denoted as pole piece preparation devices, and the pole piece preparation devices may be provided with at least two sets, and at least two sets of pole piece preparation devices are respectively disposed on two opposite sides of the base frame 600, so as to be respectively used for processing the positive pole piece 22 and the negative pole piece 22. The two sets of pole piece preparation devices can be divided into a positive pole piece preparation device 10a and a negative pole piece preparation device 10b, and the positive pole piece 22 and the negative pole piece 22 which are processed by the positive pole piece preparation device 10a and the negative pole piece preparation device 10b can be conveyed to the lamination position 14 through the conveying mechanism 100, so that the positive pole piece 22, the negative pole piece 22 and other structures forming the battery cells can be assembled into a semi-finished battery cell by the lamination device 500 at the lamination position 14.

Referring to fig. 2 and 3, in one embodiment, the stacking apparatus 10 further includes a base frame 600, where the base frame 600 is provided with a unwinding shaft 620, and the pole piece material belt 21 is wound around the unwinding shaft 620. The unwind shaft 620 is capable of rotating at a constant speed to drive the pole piece reels 20 to rotate at a constant speed to feed the transport mechanism 100 at a constant speed. The conveying mechanism 100 can convey the pole piece material belt 21 led out by the pole piece material roll 20 to each station to finish corresponding processing.

Referring to fig. 3 and 4, in one embodiment, the base frame 600 is provided with a plurality of support rollers 630, and the pole piece material belt 21 may be wound around the outer circumference of the support rollers 630. Thus, on the one hand, the pole piece material belt 21 can be kept in a flat state during the conveying process by the support roller 630, so that the conveying precision of the pole piece material belt 21 is improved. On the other hand, the conveying direction of the pole piece material belt 21 can also be adjusted by the support roller 630, so that the pole piece material belt 21 can be conveyed to each station smoothly.

It can be appreciated that the supporting roller 630 is rotatably disposed on the base frame 600, so that the supporting roller 630 is matched with the pole piece material belt 21 in a rolling manner, so as to reduce the resistance of the conveying mechanism 100 in the process of conveying the pole piece material belt 21 and improve the smoothness.

Referring to fig. 4, in one embodiment, the cutting mechanism 200 includes a laser 210 for emitting laser light toward the tab cut position 11, i.e., the cutting mechanism 200 may form tabs on the tab stock 21 by laser cutting. The lug is formed by adopting a laser cutting mode, so that the forming precision of the lug can be improved.

The laser 210 is adjustably positioned on the pedestal 600. Thus, the laser 210 can form tabs with different shapes and sizes on the tab material tape. In other words, by doing so, the suitability of the dicing and stacking apparatus 10 for adapting to different sizes of cells can be improved.

Referring to fig. 4 and 5, in one embodiment, the cutting mechanism 200 further includes a first displacement assembly 220 and a second displacement assembly 230, wherein the first displacement assembly 220 can drive the laser 210 to move along a first direction so as to adjust a position of the laser 210 relative to the tab position 11; the second displacement assembly 230 can drive the laser 210 to move along the second direction to adjust the position of the laser 210 relative to the tab. Further, the conveying mechanism 100 is configured to drive the pole piece material belt 21 to pass through the tab cutting position 11 along the third direction, where the first direction, the second direction and the third direction intersect each other. Therefore, the first displacement assembly 220 and the second displacement assembly 230 are matched with the conveying mechanism 100, so that the laser 210 can move relative to the tab 11 in three different directions, and the requirements of various positions of the laser 210 can be met.

Referring to fig. 5 and 6, in one embodiment, the first displacement assembly 220 includes a first driving member (not shown), a first sliding rail 221 extending along a first direction, and a first sliding table 222 slidably engaged with the first sliding rail 221, and the laser 210 is disposed on the first sliding table 222 to move along the first sliding table 222 along the first direction toward or away from the tab position 11. The first driving member is connected to the first sliding table 222 to drive the first sliding table 222 to move along the first sliding rail 221.

The second displacement assembly 230 includes a second sliding rail 231, a second sliding table 232, and a second driving member 233. The second sliding rail 231 extends along the second direction, the second sliding table 232 is in sliding fit with the second sliding rail 231, and the first sliding rail 221 is arranged on the second sliding table 232 so as to move along the second direction along with the second sliding table 232. The second driving member 233 is connected to the second sliding table 232 to drive the second sliding table 232 to move along the second sliding rail 231.

Referring again to fig. 4, in one embodiment, the conveying mechanism 100 includes a first driving roller 110, where the first driving roller 110 is rotatably disposed on the base frame 600 for winding the pole piece material belt 21. On the way of the conveying mechanism 100 conveying the pole piece material belt 21, the first driving roller 110 is located between the tab cutting position 11 and the V-shaped angle cutting position 12 to pull the pole piece material belt 21 to pass through the tab cutting position 11. It can be appreciated that, since the pole piece material belt 21 is of a sheet structure with a certain deformable property, the pole piece material belt 21 is driven to move by pulling and pulling, so that the pole piece material belt 21 can have higher position accuracy. Thereby, the position accuracy of the pole piece material belt 21 at the tab cutting position 11 can be improved, so that the size accuracy of the tab cutting can be improved.

The rotational linear velocity of the first drive roller 110 and the linear velocity of the rotation of the unwind spool 620 are matched to each other to collectively control the overall transport speed of the pole piece web 21. Meanwhile, the supporting roller 630 can also provide tensioning effect for the pole piece material belt 21, so that the occurrence probability of loosening and falling of the pole piece material roll 20 is reduced.

Referring to fig. 4, in one embodiment, the stacking apparatus 10 further includes a tension control mechanism 720, where the tension control mechanism 720 is movably disposed on the base frame 600, and is used to tension the pole piece material belt 21, so as to reduce the occurrence of the situation that the pole piece material belt 21 is too loose or too tight and crumbles. On the transfer path of the pole piece material belt 21, a tension control mechanism 720 is arranged between the unwinding shaft 620 and the cutting mechanism 200 to improve the position accuracy of the pole piece material belt 21 at the tab cutting position 11. Of course, the tension control mechanism 720 may be provided in plural, and the tension control mechanisms 720 may be provided at other positions on the transfer path of the pole piece material belt 21 according to the need.

With continued reference to fig. 4, in one embodiment, the tension control mechanism 720 may include a swing frame 721 rotatably coupled to the base frame 600 and a tension roller 722 rotatably disposed on the swing frame 721. The pole piece material belt 21 is wound on the tensioning roller 722, and when the swinging frame 721 rotates, the pole piece material belt 21 moves correspondingly along with the swinging frame 721, so that the pole piece material belt 21 is tensioned or loosened.

Referring to fig. 5 and 6, in one embodiment, the stacking apparatus 10 further includes a blowing mechanism (not shown, the same applies below), and an air outlet of the blowing mechanism faces the tab cutting position 11 to form positive pressure at the tab cutting position 11 to blow dust on the pole piece material belt 21. It will be appreciated that the laser 210 will generate powder when cutting the tab, and the powder remaining on the pole piece material belt 21 can be blown away by the blowing mechanism, so as to reduce the influence of the positioning and cutting of the tab of the powder laser 210 and the influence of the powder remaining on the pole piece 22 on the quality of the battery cell.

In one embodiment, the purging mechanism may include an air knife, and providing positive pressure in the form of an air knife provides better dust removal.

With continued reference to fig. 5 and 6, in one embodiment, the stacking apparatus 10 further includes a dust suction mechanism 710, where a suction port of the dust suction mechanism 710 faces the tab cutting position 11, so as to form a negative pressure at the tab cutting position 11 to absorb dust on the pole piece material belt 21. Thus, on one hand, the influence of dust and smoke raised during cutting on laser cutting and positioning can be reduced. On the other hand, the dust raised by the purge mechanism can be prevented from diffusing to other positions or other positions of the pole piece material tape 21.

Referring to fig. 6, in one embodiment, the base frame 600 includes a support 610, where the support 610 is provided with a receiving cavity (not shown in the drawings, and the same applies below) for receiving the pole piece material tape 21 located at the tab cutting position 11, and the support 610 is provided with an opening through which the laser 210 penetrates, and the air outlet and the suction port are communicated with the receiving cavity. Therefore, the process of forming the tab can be in a relatively isolated space, and on one hand, the laser cutting is prevented from being interfered by factors in the external environment; on the other hand, dust generated by laser cutting is prevented from flying to other positions or to other areas of the pole piece material tape 21. The blowing mechanism and the dust collection mechanism 710 may be both disposed outside the accommodating cavity and connected to the inside of the accommodating cavity through a pipeline, so as to relatively reduce the volume of the support 610.

In one embodiment, the bracket 610 may have a flare formed thereon, and the suction opening of the dust suction mechanism 710 is connected to the bottom of the flare, so that dust in the accommodating cavity can be conveniently collected and recovered through the flare.

Referring to fig. 7, in one implementation, the V-angle cutting mechanism 300 and the cutting mechanism 400 may each process the pole piece strip 21 by die cutting.

Referring to fig. 4, 8 and 9, in one embodiment, the conveying mechanism 100 further includes a buffer mechanism 130, and the buffer mechanism 130 is disposed between the tab cutting position 11 and the V-angle cutting position 12. The buffer mechanism 130 includes a fixed roller 131 and an adjusting roller 132, and the fixed roller 131 and the adjusting roller 132 are both used for winding the pole piece material belt 21 so as to change the conveying direction of the pole piece material belt 21. The adjusting roller 132 and the fixing roller 131 may be respectively abutted against two opposite sides of the pole piece material belt 21. The adjusting roller 132 is movably disposed on the base frame 600, and since the fixed roller 131 and the adjusting roller 132 are uniformly used for winding the pole piece material belt 21 to change the conveying direction of the pole piece material belt 21, the length of the pole piece material belt 21 between the fixed roller 131 and the adjusting roller 132 can be changed when the adjusting roller 132 moves relative to the fixed roller 131. Thereby, the buffer mechanism 130 has a certain capacity of buffering the pole piece material belt 21.

It should be noted that, since the cutting mechanism 200 cuts the tab by laser, the pole piece material belt 21 is continuously conveyed when the tab position 11 is cut; the V-angle cutting mechanism 300 and the cutting mechanism 400 are die-cutting processing, and the pole piece material belt 21 is intermittently conveyed in the V-angle cutting position and the die-cutting position 13. In this embodiment, a certain amount of pole piece material strips 21 are buffered by the buffer mechanism 130, so that continuous conveying and intermittent conveying of the pole piece material strips 21 in front of the buffer mechanism 130 on the conveying path of the pole piece material strips 21 can be matched with each other, and the occurrence probability of excessive tensioning or excessive loosening of the pole piece material strips 21 due to unmatched conveying modes is reduced. The movement frequency and movement amplitude of the regulating roller 132 can be specifically designed according to the overall conveying speed of the pole piece material belt 21, the size of the single pole piece 22 and other parameters.

With continued reference to fig. 8 and 9, in one embodiment, the fixed rollers 131 are spaced along the reference axis O, and the adjusting rollers 132 are spaced from the reference axis O, that is, the fixed rollers 131 and the adjusting rollers 132 are offset from each other. The distance between the adjusting roller 132 and the reference axis O is shown by reference number K in fig. 9, and the adjusting roller 132 is moved relative to the fixed roller 131 to adjust the size of the distance K.

On the reference axis O, projections of the regulating rollers 132 on the reference axis O are alternately arranged with the fixed rollers 131 one by one for the supply pole piece tape 21 to be wound alternately around the regulating rollers 132 and the fixed rollers 131. The pole piece material belt 21 can be alternately wound on the fixed roller 131 and the regulating roller 132 in an S-shaped meandering manner, so that the length of the pole piece material belt 21 which can be stored by the buffer mechanism 130 is increased on the basis of occupying a relatively small space.

Referring to fig. 9, in one embodiment, a guide rail 640 is provided on the base frame 600, and the buffer mechanism 130 includes a connecting frame 133 slidably engaged with the guide rail 640. The adjusting rollers 132 are all arranged on the connecting frame 133, and the plurality of adjusting rollers 132 can be simultaneously driven to move relative to the fixed roller 131 by driving the connecting frame 133 to slide along the guide rail 640. Of course, in other embodiments, each dancer 132 may be configured to move independently.

Referring again to fig. 7, in one embodiment, the conveying mechanism 100 further includes a second driving roller 120 for winding the pole piece material belt 21, the second driving roller 120 is rotatably disposed on the base frame 600, and the first driving roller 110 is used for pulling the pole piece material belt 21 to move when rotating. On the path of the conveying mechanism 100 conveying the pole piece material belt 21, the second driving roller 120 is located between the V-angle cutting position 12 and the die cutting position 13 to pull the pole piece material belt 21 to pass through the V-angle cutting position 12, so that the precision of the V-angle cutting mechanism 300 in die cutting the pole piece material belt 21 can be improved.

With continued reference to fig. 7, in one embodiment, the conveying mechanism 100 further includes a conveyor belt 140 and a negative pressure generator (not shown, and the following description refers to the description), where the conveyor belt 140 is provided with a plurality of adsorption holes 141, and the negative pressure generator is in communication with the adsorption holes 141 to form a negative pressure in the adsorption holes 141 for adsorbing the pole piece 22 to the conveyor belt 140. The pole piece material belt 21 can be driven to move by the conveyor belt 140 in cooperation with the second driving roller 120. When the pole piece material tape 21 is die cut into separate pole pieces 22 by the cutting mechanism 400, the negative pressure generator can adsorb each pole piece 22 on the conveyor belt 140 through the adsorption hole 141 to further advance with the conveyor belt 140.

Referring to fig. 2 and 3, in one embodiment, the conveying mechanism 100 is further configured to convey the pole piece material strip 21 past the detecting positions 15, where the detecting positions 15 are disposed between the die cutting positions 13 and the lamination positions 14. The slitting apparatus 10 also includes a detection mechanism 740, the detection mechanism 740 being configured to detect dimensional and surface imperfections of the pole piece 22. Thus, the detection mechanism 740 can detect parameters such as the size and surface flaws of the pole piece 22 formed by processing the pole piece material belt 21, so as to determine whether the pole piece 22 is good. The pole piece 22 judged to be defective will be rejected at the conveyor belt 140.

Referring to fig. 2 and 3, in one embodiment, a conveyor belt 140 is used to transport pole pieces 22 to lamination station 14. After the pole pieces 22 are stacked to form the battery cells, the lamination device 500 performs steps such as rubberizing, hot press molding of the battery cells, short circuit detection, side rubberizing of the battery cells and the like, and then blanking can be performed. Lamination device 500 may specifically employ a zigzag lamination, a winding lamination, a bag-making lamination, and other lamination modes to perform lamination according to actual requirements of the battery cells.

In one embodiment, the stacking apparatus 10 may further be provided with a plurality of deviation correcting mechanisms 730, wherein the deviation correcting mechanisms 730 are telescopically arranged on the base frame 600 and are used for winding the pole piece material belt 21. The deviation correcting mechanism 730 can adjust the deviation of the pole piece material belt 21 relative to the supporting roller 630 and other rollers when stretching and contracting, so as to improve the conveying precision of the pole piece material belt 21.

The number of the deviation correcting mechanisms 730 can be two, wherein one deviation correcting mechanism 730 is arranged between the tension control mechanism 720 and the cutting mechanism 200, so that the accuracy of the pole piece material belt 21 when moving to the pole lug cutting position 11 is improved. Another deviation correcting mechanism 730 may be disposed between the V-cut corner 12 and the tab 11 to adjust the accuracy of the movement of the strip 21 to the V-cut corner 12 and the die cut 13.

In order to facilitate understanding of the processing flow of the stacking apparatus 10 provided in this embodiment, a process for processing the pole piece 22 by the stacking apparatus 10 will be briefly described with reference to fig. 2 and 3:

First, the pole piece roll 20 is placed on the reel 620, and the pole piece tape 21 is transported to the tab cutting position 11 through the tension control mechanism 720 and the deviation correcting mechanism 730 to perform tab molding. Wherein the first driving roller 110 and the unwinding shaft 620 cooperate with each other to convey the pole piece material belt 21 at a constant speed.

After the tab is formed, the pole piece material belt 21 is rectified by another rectifying mechanism 730, and enters a buffering mechanism 130 to buffer a certain amount of pole piece material belt 21. Then, the second driving roller 120 pulls the pole piece material belt 21 to move to the V-angle cutting position 12 for V-angle cutting, and moves to the die cutting position 13 for cutting to form separated pole pieces 22.

Each separated pole piece 22 is conveyed to the detection position 15 by the conveyor belt 140 to be detected, and the pole piece 22 with defective detection results is removed. The pole pieces 22 that are good as a result of the inspection are transported to the lamination station 14 for lamination to form the cells.

Finally, carrying the stacked battery cells by a manipulator, and sticking two-dimensional code glue, performing hot press molding of the battery cells, detecting short circuits, sticking side glue of the battery cells and the like.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A stacking apparatus, the stacking apparatus comprising:

The conveying mechanism is used for conveying the pole piece material belt to sequentially pass through the pole lug cutting position, the V angle cutting position, the die cutting position and the lamination position;

The cutting mechanism is used for facing the pole piece material belt positioned at the pole cutting lug position so as to cut the pole piece material belt to form a pole lug;

The V-angle cutting mechanism faces the pole piece material belt positioned at the V-angle cutting position so as to cut off the sharp angle of the pole piece material belt;

the cutting mechanism is used for cutting the pole piece material belt passing through the die cutting position to form separated pole pieces; and

And the lamination device is used for folding the tabs at the lamination positions to form a semi-finished product cell.

2. The apparatus of claim 1 further comprising a base frame, wherein the cutting mechanism includes a laser for emitting laser light toward the tab locations, and wherein the laser is adjustably positioned on the base frame.

3. The cutting and stacking apparatus of claim 2 wherein said cutting mechanism further comprises:

The first displacement assembly comprises a first sliding rail extending along a first direction and a first sliding table in sliding fit with the first sliding rail, and the laser is arranged on the first sliding table so as to move along the first sliding table along the first direction towards or away from the tab cutting position;

The second displacement assembly comprises a second sliding rail extending along a second direction and a second sliding table in sliding fit with the second sliding rail, and the first sliding rail is arranged on the second sliding table so as to move along the second direction along with the second sliding table;

The conveying mechanism is used for driving the pole piece material belt to pass through the pole cutting lug position along a third direction, and the first direction, the second direction and the third direction are intersected in pairs.

4. The apparatus of claim 2, further comprising a purge mechanism having an air outlet directed toward the tab locations to create positive pressure at the tab locations to purge dust from the pole piece strip; and/or

The cutting and stacking equipment further comprises a dust collection mechanism, wherein a suction port of the dust collection mechanism faces the tab cutting position, so that negative pressure is formed at the tab cutting position to absorb dust on the pole piece material belt.

5. The cutting and stacking apparatus of claim 4, wherein the base frame comprises a bracket provided with a receiving cavity for receiving the pole piece material strip at the tab position, the bracket is provided with an opening for laser penetration of the laser, and the air outlet and the suction port are communicated with the receiving cavity.

6. The cutting and stacking apparatus according to claim 2, wherein the conveying mechanism further comprises a buffer mechanism disposed between the tab cutting position and the V-angle cutting position, the buffer mechanism comprising a fixed roller and a regulating roller, both of which are provided with the pole piece material belt to be capable of changing a conveying direction of the pole piece material belt, the regulating roller being movably provided to the base frame, the regulating roller being used to change a length of the pole piece material belt between the fixed roller and the regulating roller when moving relative to the fixed roller.

7. The apparatus of claim 6, wherein a plurality of said fixed rollers are spaced apart along a reference axis, and a plurality of said adjustment rollers are spaced apart from said reference axis, wherein projections of said adjustment rollers on said reference axis alternate with said fixed rollers one by one for said pole piece strip to be alternately wound around said adjustment rollers and said fixed rollers.

8. The apparatus of any one of claims 2 to 7, wherein the conveyor mechanism includes a first drive roller and a second drive roller, each rotatably disposed on the base frame, the first drive roller and the second drive roller each being configured to receive the pole piece strip, the first drive roller being positioned between the tab cutting position and the V-cut angle position on a path of the conveyor mechanism conveying the pole piece strip to pull the pole piece strip past the tab cutting position; the second driving roller is positioned between the V-cutting angle position and the die cutting position to pull the pole piece material belt to pass through the V-cutting angle position.

9. The cutting and stacking apparatus of claim 8 wherein the conveyor further comprises a conveyor belt and a negative pressure generator, the conveyor belt being provided with a plurality of suction holes, the negative pressure generator being in communication with the suction holes to create a negative pressure within the suction holes for sucking the pole pieces to the conveyor belt.

10. The cutting and stacking device according to claim 2, wherein the conveying mechanism, the cutting mechanism, the V-angle cutting mechanism and the cutting mechanism are denoted as pole piece preparation devices, the pole piece preparation devices are at least two sets, and at least two sets of pole piece preparation devices are respectively arranged on two opposite sides of the base frame and are respectively used for processing the positive pole piece and the negative pole piece.