A lamination device and lamination production line

Abstract

The present invention provides a lamination device and a lamination production line, which belong to the technical field of lithium battery manufacturing equipment, and include: a lamination mechanism, which is arranged with a plurality of circumferential intervals, suitable for lamination to form a battery cell; a feeding mechanism, which is rotatably arranged above the lamination mechanism, the feeding mechanism includes a plurality of material taking structures arranged along the circumference, the planes where the plurality of material taking structures are located are arranged parallel to the planes where the plurality of lamination mechanisms are located, and the material taking structures are suitable for alternately feeding positive electrode sheets or negative electrode sheets to each of the lamination mechanisms; a swing unwinding mechanism, which is arranged corresponding to the lamination mechanism, and is suitable for driving the diaphragm to move back and forth. The lamination device provided by the present invention can lamination on a plurality of lamination mechanisms at the same time, thereby improving the lamination efficiency, and in the subsequent processing process, a hot pressing separation mechanism is used to cut the battery cell into a plurality of battery cell monomers, so that a plurality of battery cells can be formed by lamination at one time, and the battery cell production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery manufacturing equipment, and in particular to a lamination device and a lamination production line. Background Art

[0002] Lamination technology is one of the lithium-ion battery manufacturing technologies. The speed and accuracy of lamination technology directly determine the production capacity of lithium-ion production lines and the manufacturing cost of battery cells. In the battery cell preparation process, positive and negative electrodes need to be stacked alternately, and a diaphragm is required to separate the positive and negative electrodes. When stacking positive and negative electrodes, the existing lamination device only places a single electrode unit at a time. Therefore, in one production process, the lamination device can only produce one battery cell, and the production efficiency is low. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low production efficiency of the lamination device in the prior art, thereby providing a lamination device and a lamination production line.

[0004] In order to solve the above problems, the present invention provides a stacking device, including: a stacking mechanism, which is arranged at intervals along the circumferential direction and is suitable for stacking to form a battery core; a loading mechanism, which is rotatably arranged above the stacking mechanism, and the loading mechanism includes a plurality of feeding structures arranged along the circumferential direction, and the planes where the plurality of feeding structures are located are arranged parallel to the planes where the plurality of stacking mechanisms are located, and the feeding structures are suitable for alternately feeding positive electrode sheets containing a plurality of positive electrode sheet units or negative electrode sheets containing a plurality of negative electrode sheet units to each of the stacking mechanisms; a swinging unwinding mechanism, which is arranged corresponding to the stacking mechanism and is suitable for driving the diaphragm to move back and forth.

[0005] Optionally, the stacking device further comprises a positive pole correcting mechanism and a negative pole correcting mechanism, and the feeding mechanism is suitable for switching between the positive pole correcting mechanism, the negative pole correcting mechanism and a plurality of the stacking mechanisms.

[0006] Optionally, two stacking mechanisms are relatively spaced apart, four material-taking structures are circumferentially spaced apart, and the feeding mechanism reciprocates in the vertical direction to drive the material-taking structure to switch between adjacent positive-pole correction mechanisms and stacking mechanisms, and adjacent negative-pole correction mechanisms and stacking mechanisms.

[0007] Optionally, the feeding mechanism further includes a lifting drive structure, and the lifting drive structure is transmission-connected to the four material-retrieving structures.

[0008] Optionally, the positive pole correcting mechanism and the negative pole correcting mechanism are arranged between the two stacking mechanisms and are relatively spaced apart, and the straight line where the two stacking mechanisms are located is perpendicular to the straight line where the positive pole correcting mechanism and the negative pole correcting mechanism are located.

[0009] Optionally, each stacking mechanism is provided with a plurality of stacking positions, the positive electrode correction mechanism is provided with a plurality of positive electrode correction positions, the negative electrode correction mechanism is provided with a plurality of negative electrode correction positions, and the material taking structure can transport a plurality of the positive electrode sheets or a plurality of the negative electrode sheets at the same time.

[0010] Optionally, the material taking structure is an adsorption structure.

[0011] The present invention also provides a lamination production line, comprising the lamination device mentioned above.

[0012] Optionally, the lamination production line further comprises a hot pressing and separation mechanism, which is disposed downstream of the lamination mechanism and is suitable for hot pressing the battery cell and cutting it into a plurality of battery cell monomers.

[0013] Optionally, a transfer mechanism is provided between the stacking mechanism and the hot pressing separation mechanism.

[0014] Optionally, the lamination production line further includes a positive electrode production conveyor line and a negative electrode production conveyor line, and the tail end of the positive electrode production conveyor line and the tail end of the negative electrode production conveyor line are both arranged corresponding to the lamination device.

[0015] Optionally, the positive electrode production conveyor line and the negative electrode production conveyor line both include an electrode sheet making ear device and an electrode sheet cutting and conveying device which are arranged in sequence, and the electrode sheet cutting and conveying device is suitable for cutting the positive electrode sheet strip or the negative electrode sheet strip into a plurality of positive electrode sheets or a plurality of negative electrode sheets, and conveying the plurality of positive electrode sheets or a plurality of negative electrode sheets toward the lamination device.

[0016] Optionally, the electrode sheet cutting and conveying device includes: a driving mechanism, suitable for driving a positive electrode sheet material belt or a negative electrode sheet material belt; an adsorption conveyor belt, arranged downstream of the driving mechanism, and a plurality of the adsorption conveyor belts are arranged at intervals along the driving direction of the driving mechanism; a cutting structure, arranged at the interval between two adjacent adsorption conveyor belts; an output conveyor belt, arranged downstream of the plurality of adsorption conveyor belts, suitable for receiving and conveying the positive electrode sheet or the negative electrode sheet output by the adsorption conveyor belt.

[0017] Optionally, the adsorption conveyor belt includes an adsorption zone and a release zone, the adsorption zone and the release zone are arranged along the conveying direction of the adsorption conveyor belt, the release zone is arranged on both sides of the adsorption zone, and the output conveyor belt has a first conveying state with the same conveying speed as the adsorption conveyor belt, and also has a second conveying state with a conveying speed greater than the conveying speed of the adsorption conveyor belt.

[0018] Optionally, the electrode sheet cutting and conveying device includes a die-cutting roller mechanism, which includes a correspondingly arranged concave die roller and a convex die roller, the concave die roller is provided with a concave die cutting edge, the convex die roller is provided with a convex die cutting edge, the concave die cutting edge and the convex die cutting edge are adapted to each other, and the positive electrode sheet material strip or the negative electrode sheet material strip is allowed to pass between the concave die roller and the convex die roller, and the concave die cutting edge and the convex die cutting edge are suitable for cooperating in cutting the positive electrode sheet material strip or the negative electrode sheet material strip.

[0019] The present invention has the following advantages:

[0020] 1. The present invention provides a stacking device, which realizes the loading of several stacking mechanisms during the rotation of several material taking structures. Therefore, stacking can be carried out on several stacking mechanisms at the same time, which improves the stacking efficiency. In addition, positive electrode sheets containing several positive electrode sheet units and negative electrode sheets containing several negative electrode sheet units are stacked at the same time to form battery cells. In the subsequent processing, a hot pressing separation mechanism is used to cut the hot pressed battery cells into several battery cell monomers. Therefore, multiple battery cells can be stacked at one time, and the battery cell production efficiency is high.

[0021] 2. The present invention provides a stacking device, which uses a positive electrode correction mechanism and a negative electrode correction mechanism to simultaneously correct the positive electrode sheet body containing a plurality of positive electrode sheet units and the negative electrode sheet body containing a plurality of negative electrode sheet units, and then uses a loading mechanism to load the stacking mechanism for stacking to ensure the stacking accuracy.

[0022] 3. A stacking device provided by the present invention takes the example of setting four material picking structures. When two of the material picking structures correspond to the positive electrode correction mechanism and the negative electrode correction mechanism for picking materials, the other two material picking structures correspond to the two stacking mechanisms for stacking. The feeding mechanism can simultaneously pick up materials and stack sheets in one rotation process, and the feeding mechanism has no empty stroke, thereby improving the feeding efficiency.

[0023] 4. A stacking device provided by the present invention sets a plurality of stacking positions on a stacking mechanism, and correspondingly sets a plurality of positive pole correction positions on a positive pole correction mechanism and a plurality of negative pole correction positions on a negative pole correction mechanism. Therefore, the stacking of a plurality of battery cells can be achieved simultaneously on a stacking mechanism, thereby improving the production efficiency of the battery cells.

[0024] 5. The present invention provides a lamination production line, which is provided with a pole piece cutting and conveying device, and utilizes a driving structure and an adsorption conveyor belt to drive the pole piece material belt to move, so that the pole piece material belt is continuously arranged on several adsorption conveyor belts, and then, utilizes a cutting structure to cut the pole piece material belt between two adjacent adsorption conveyor belts. Therefore, the pole piece material belt can be cut into multiple pole piece bodies at one time, and the output conveyor belt is utilized to realize the conveyance of multiple pole piece bodies, thereby improving the cutting efficiency and conveying efficiency of the pole piece.

[0025] 6. The present invention provides a lamination production line. During the process of transferring the pole sheet from the adsorption conveyor belt to the output conveyor belt, the output conveyor belt and the adsorption conveyor belt maintain the same conveying speed to ensure that the adsorption conveyor belt and the output conveyor belt will not pull the pole sheet, thereby ensuring the quality of the pole sheet. After the pole sheet leaves the adsorption area of ​​the adsorption conveyor belt, the output conveyor belt accelerates the conveying to increase the interval between adjacent pole sheets, thereby preparing for the use of the pole sheet in the subsequent lamination process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a lamination device provided in Embodiment 1 of the present invention is shown;

[0028] Figure 2 The structure schematic diagram of the lamination production line provided by Embodiment 2 of the present invention is shown;

[0029] Figure 3 A first structural schematic diagram of a pole piece strip, a pole piece body and a pole piece unit provided in Embodiment 1 of the present invention is shown;

[0030] Figure 4 A second structural schematic diagram of a pole piece strip, a pole piece body and a pole piece unit provided in Embodiment 1 of the present invention is shown;

[0031] Figure 5 The overall structural schematic diagram of the electrode cutting and conveying device provided in Embodiment 2 of the present invention is shown;

[0032] Figure 6 A schematic diagram of the structure of the adsorption conveyor belt provided by Example 2 of the present invention is shown;

[0033] Figure 7 A partial structural schematic diagram of a pole piece cutting and conveying device provided in Embodiment 2 of the present invention is shown;

[0034] Figure 8 A schematic structural diagram of a die-cutting roller mechanism provided in an alternative embodiment of the present invention is shown.

[0035] Description of reference numerals:

[0036] 100, lamination device; 110, lamination mechanism; 111, lamination platform; 120, feeding mechanism; 121, material taking structure; 130, hot pressing separation mechanism; 140, positive electrode deviation correction mechanism; 150, negative electrode deviation correction mechanism; 160, transfer mechanism; 161, unloading manipulator; 162, transfer manipulator; 200, positive electrode production conveyor line; 300, negative electrode production conveyor line; 400, electrode piece ear making device; 500, electrode piece cutting and conveying device; 510, driving structure; 511, roller body; 520, Adsorption conveyor belt; 521, adsorption area; 522, release area; 523, belt body; 524, conveyor roller; 530, cutting structure; 531, support table; 532, cutting part; 540, output conveyor belt; 550, die-cutting roller mechanism; 551, die roller; 5511, die edge; 552, punch roller; 5521, punch edge; 600, positive electrode sheet belt; 610, positive electrode sheet body; 611, positive electrode sheet unit; 700, negative electrode sheet belt; 710, negative electrode sheet body; 711, negative electrode sheet unit. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] like Figure 1 and Figure 2 A specific embodiment of the stacking device shown includes: a stacking mechanism 110, a feeding mechanism 120 and a swinging feeding mechanism. Several stacking mechanisms 110 are arranged at intervals along the circumferential direction, and the stacking mechanisms 110 are suitable for stacking to form battery cells. The feeding mechanism 120 is rotatably arranged above the stacking mechanism 110, and the feeding mechanism 120 includes several material taking structures 121 arranged along the circumferential direction, and the planes where the several material taking structures 121 are located are parallel to the planes where the several stacking mechanisms 110 are located. During the rotation of the feeding mechanism 120, the material taking structure 121 alternately feeds the positive electrode sheet 610 or the negative electrode sheet 710 to each stacking mechanism 110. The swinging feeding mechanism is arranged corresponding to the stacking mechanism 110, and the swinging feeding mechanism is suitable for driving the diaphragm to move back and forth so as to stack the diaphragm between the positive electrode sheet 610 and the negative electrode sheet 710.

[0043] It is worth mentioning that please refer to Figure 3 and Figure 4 The positive electrode sheet 610 includes a plurality of continuously arranged positive electrode sheet units 611, and the negative electrode sheet 710 includes a plurality of continuously arranged negative electrode sheet units 711. Figure 3 As shown, a plurality of positive electrode sheet units 611 or a plurality of negative electrode sheet units 711 may be arranged in a row continuously, as shown in FIG. Figure 4 As shown, a plurality of positive electrode sheet units 611 or a plurality of negative electrode sheet units 711 may be arranged in two rows in a row. Of course, a plurality of positive electrode sheet units 611 or a plurality of negative electrode sheet units 711 may also be arranged in multiple rows and columns in a row.

[0044] For further explanation, please refer to Figure 4 The positive electrode sheet 610 or the negative electrode sheet 710 includes two rows of positive electrode sheet units 611 or negative electrode sheet units 711 arranged continuously, and the non-coating area is between the upper row of positive electrode sheet units 611 and the lower row of positive electrode sheet units 611, or the upper row of negative electrode sheet units 711 and the lower row of negative electrode sheet units 711. The electrode ears are made above the upper row of positive electrode sheet units 611 or negative electrode sheet units 711, and the electrode ears are made below the lower row of positive electrode sheet units 611 or negative electrode sheet units 711.

[0045] During the rotation of several material taking structures 121, several stacking mechanisms 110 are loaded with materials, so stacking can be carried out on several stacking mechanisms 110 at the same time, which improves the stacking efficiency. In addition, a positive electrode sheet body 610 including several positive electrode sheet units 611 and a negative electrode sheet body 710 including several negative electrode sheet units 711 are used for stacking to form a battery cell. In the subsequent processing, a hot pressing separation mechanism 130 is used to cut the battery cell into several battery cell monomers. Therefore, multiple battery cells can be stacked at one time, and the battery cell production efficiency is high.

[0046] like Figure 1 and Figure 2 As shown, the stacking device 100 further includes a positive electrode correction mechanism 140 and a negative electrode correction mechanism 150, and the feeding mechanism 120 can switch between the positive electrode correction mechanism 140, the negative electrode correction mechanism 150 and a plurality of stacking mechanisms 110. Specifically, in this embodiment, as Figure 1 As shown, two stacking mechanisms 110 are arranged at relative intervals, four material-taking structures 121 are arranged at circumferential intervals, and the feeding mechanism 120 reciprocates around the vertical direction to drive the material-taking structure 121 to switch between the adjacent positive electrode correction mechanism 140 and stacking mechanism 110, and the negative electrode correction mechanism 150 and stacking mechanism 110.

[0047] It is worth noting that the “vertical direction” in the above-mentioned “the feeding mechanism 120 reciprocates around the vertical direction” refers to Figure 1 The direction perpendicular to the drawing is also the rotation center of the four material taking structures 121.

[0048] After the positive electrode deviation correction mechanism 140 and the negative electrode deviation correction mechanism 150 are used to correct the deviation of the positive electrode sheet 610 and the negative electrode sheet 710, the feeding mechanism 120 is used to feed the stacking mechanism 110 for stacking, so as to ensure the stacking accuracy. In addition, four material taking structures 121 are set, and when two of the material taking structures 121 correspond to the positive electrode deviation correction mechanism 140 and the negative electrode deviation correction mechanism 150 for taking materials, the other two material taking structures 121 correspond to the two stacking mechanisms 110 for stacking, and the feeding mechanism 120 can simultaneously realize material taking and stacking in one rotation process, and the feeding mechanism 120 has no empty stroke, thereby improving the feeding efficiency.

[0049] In this embodiment, if Figure 1 As shown, the positive electrode correction mechanism 140 and the negative electrode correction mechanism 150 are arranged between the two stacking mechanisms 110 and are relatively spaced apart, and the straight line where the two stacking mechanisms 110 are located is perpendicular to the straight line where the positive electrode correction mechanism 140 and the negative electrode correction mechanism 150 are located. Therefore, the reciprocating rotation angle of the feeding mechanism 120 is 90°.

[0050] Of course, the straight line where the two stacking mechanisms 110 are located and the straight line where the positive pole correction mechanism 140 and the negative pole correction mechanism 150 are located can also be set at other angles. It is only necessary to change the reciprocating rotation angle of the loading mechanism 120 to cooperate with the positive pole correction mechanism 140, the negative pole correction mechanism 150 and the stacking mechanism 110 to complete material picking and loading.

[0051] It is worth noting that the rotation centers of the four material taking structures 121 and the straight line where the two stacking mechanisms 110 are located coincide with the intersection of the straight lines where the positive electrode deviation correction mechanism 140 and the negative electrode deviation correction mechanism 150 are located.

[0052] In this embodiment, the positive electrode correction mechanism 140 includes a positive electrode correction platform, on which a pushing part is provided, and the pushing part can push the positive electrode sheet 610 in different directions to move the positive electrode sheet 610 to a predetermined position; the negative electrode correction mechanism 150 includes a negative electrode correction platform, on which a pushing part is provided, and the pushing part can push the negative electrode sheet 710 in different directions to move the negative electrode sheet 710 to a predetermined position.

[0053] Of course, the positive electrode deviation correction mechanism 140 and the negative electrode deviation correction mechanism 150 may also be other structures capable of deviation correction, such as deviation correction belts.

[0054] In this embodiment, the feeding mechanism 120 further includes a lifting drive structure, which is in transmission connection with the four material taking structures 121 to drive the four material taking structures 121 to move synchronously in the vertical direction. By setting the lifting drive structure, the four material taking structures 121 are rotated after being vertically higher than the positive electrode deviation correction mechanism 140, the negative electrode deviation correction mechanism 150 and the stacking mechanism 110, so as to avoid interference between the material taking structures 121 and the positive electrode deviation correction mechanism 140, the negative electrode deviation correction mechanism 150 and the stacking mechanism 110.

[0055] In this embodiment, each stacking mechanism 110 includes a stacking platform 111, each stacking platform 111 is provided with a stacking position, a positive pole correction position is provided on the positive pole correction platform, and a negative pole correction position is provided on the negative pole correction platform. Therefore, in one stacking process, two battery cells can be stacked simultaneously.

[0056] It is worth noting that in other alternative embodiments, each stacking table 111 is provided with a plurality of stacking positions, the positive electrode correction table is provided with a plurality of positive electrode correction positions, the negative electrode correction table is provided with a plurality of negative electrode correction positions, and each material taking structure 121 can simultaneously transport a plurality of positive electrode sheets 610 or a plurality of negative electrode sheets 710; or, each stacking table mechanism 110 includes a plurality of stacking tables 111, each stacking table 111 is provided with a stacking position, each positive electrode correction mechanism 140 includes a plurality of positive electrode correction tables, each positive electrode correction table is provided with a positive electrode correction position, each negative electrode correction mechanism 150 includes a plurality of negative electrode correction tables, each negative electrode correction table is provided with a negative electrode correction position, and each material taking structure 121 can simultaneously transport a plurality of positive electrode sheets 610 or a plurality of negative electrode sheets 710. Therefore, through the above two methods, in one lamination process, on one lamination platform mechanism 110, several battery cells can be laminated at the same time, that is, several battery cells can be produced at the same time, thereby improving production efficiency. In addition, each swing unloading mechanism can discharge materials to several corresponding lamination positions at the same time, without the need to set up additional swing unloading mechanisms, thereby simplifying the overall structure of the lamination device 100.

[0057] It should be further explained that, if a stacking mechanism 110 includes n stacking positions, a positive pole correction mechanism 140 includes n positive pole correction positions, and a negative pole correction mechanism 150 includes n negative pole correction positions, then a stacking mechanism 110 can stack n battery cells at the same time. Then, because the stacking device 100 includes two stacking mechanisms 110, the stacking device 100 can stack 2n battery cells at the same time.

[0058] In this embodiment, the loading mechanism 120 is a robot arm, and the material taking structure 121 is a suction structure disposed on the robot arm.

[0059] When using the lamination device 100 of this embodiment, when lamination is performed for the first time, Figure 2The position shown is taken as the initial position. First, the material picking structure 121 located on the upper side absorbs the negative electrode sheet 710, and the material picking structure 121 located on the lower side does not absorb the positive electrode sheet 610. The four material picking structures 121 are synchronously rotated counterclockwise by 90°, and the material picking structure 121 places the negative electrode sheet 710 on the stacking table 111 on the left. At the same time, the two material picking structures 121 corresponding to the positive electrode correcting mechanism 140 and the negative electrode correcting mechanism 150 respectively absorb the positive electrode sheet 610 and the negative electrode sheet 710; then, the four material picking structures 121 are synchronously rotated clockwise by 90 degrees, and the material picking structure 121 with the negative electrode sheet 710 places the negative electrode sheet 710 on the stacking table 111 on the right, and the material picking structure 121 with the positive electrode sheet 610 places the positive electrode sheet 610 on the stacking table 111 on the left; finally, the above steps are repeated to complete the stacking. It is worth mentioning that, for each stack of positive electrode sheet or negative electrode sheet, the swing discharge mechanism needs to cooperate to discharge the diaphragm.

[0060] It should be noted that in the process of stacking battery cells, the bottom and top layers of the battery cells are both negative electrode sheet structures wrapped with diaphragms. That is, when stacking, the negative electrode sheets usually need to be stacked first, and the negative electrode sheets also need to be stacked for the last stacking. Therefore, the negative electrode sheets 710 are stacked first on the two stacking tables 111.

[0061] Example 2

[0062] like Figure 2 as well as Figures 5 to 7 A specific implementation of the lamination production line shown includes the lamination device 100 of Example 1.

[0063] like Figure 2 As shown, the lamination device 100 also includes a hot pressing separation mechanism 130, which is arranged downstream of the stacking mechanism 110. The hot pressing separation mechanism 130 can hot press the battery cells formed by the lamination and cut them while hot pressing to form a plurality of battery cell monomers. The battery cell monomers can be transported to the subsequent process via a transfer conveyor belt.

[0064] It is worth noting that by stacking the positive electrode sheet 610, the separator and the negative electrode sheet 710, a battery cell can be formed. The battery cell is cut according to the positions of the positive electrode sheet unit 611 and the negative electrode sheet unit 711. Each battery cell unit formed includes the stacked positive electrode sheet unit 611, the separator and the negative electrode sheet unit 711.

[0065] like Figure 2 As shown, a transfer mechanism 160 is provided between the stacking mechanism 110 and the hot pressing and separating mechanism 130 , and the transfer mechanism 160 transfers the stacked cells on the stacking mechanism 110 to the hot pressing and separating mechanism 130 for hot pressing and cutting.

[0066] Specifically, in this embodiment, Figure 2 As shown, the transfer mechanism 160 includes a unloading robot 161 and a transfer robot 162 . The unloading robot 161 removes the battery cells from the stacking mechanism 110 and transfers them to the transfer robot 162 . The transfer robot 162 then transports the battery cells to the hot pressing separation mechanism 130 .

[0067] It is worth mentioning that please refer to Figure 2 The unloading robot 161 moves in the left-right direction, and the transfer robot 162 moves in the up-down direction.

[0068] like Figure 2 As shown, the lamination production line further includes a positive electrode production conveyor line 200 and a negative electrode production conveyor line 300, and the tail end of the positive electrode production conveyor line 200 and the tail end of the negative electrode production conveyor line 300 are both arranged corresponding to the lamination device 100. Specifically, the tail end of the positive electrode production conveyor line 200 is arranged corresponding to the positive electrode deviation correction mechanism 140, and the tail end of the negative electrode production conveyor line 300 is arranged corresponding to the negative electrode deviation correction mechanism 150.

[0069] like Figure 2 As shown, the positive electrode production conveying line 200 and the negative electrode production conveying line 300 both include an electrode piece tab making device 400 and an electrode piece cutting conveying device 500 which are sequentially arranged. The electrode piece tab making device 400 can make tabs on the positive electrode sheet material belt 600 or the negative electrode sheet material belt 700. The electrode piece cutting conveying device 500 is suitable for cutting the positive electrode sheet material belt 600 or the negative electrode sheet material belt 700 after the tabs are made to form a positive electrode sheet body 610 or a negative electrode sheet body 710, and conveying the positive electrode sheet body 610 or the negative electrode sheet body 710 toward the laminating device 100. The output end of the electrode piece cutting conveying device 500 is arranged corresponding to the positive electrode deviation correction mechanism 140 or the negative electrode deviation correction mechanism 150.

[0070] like Figures 5 to 7 As shown, the electrode sheet cutting and conveying device 500 includes a driving structure 510, an adsorption conveyor belt 520, a cutting structure 530 and an output conveyor belt 540. The driving structure 510 is suitable for driving the electrode sheet material belt to move toward the adsorption conveyor belt 520. The adsorption conveyor belt 520 is arranged downstream of the driving structure 510. Several adsorption conveyor belts 520 are arranged at intervals along the driving direction of the driving structure 510. The cutting structure 530 is arranged at the interval between two adjacent adsorption conveyor belts 520. The cutting structure 530 can cut the electrode sheet material belts on several adsorption conveyor belts 520 to form several electrode sheet bodies. The output conveyor belt 540 is arranged downstream of several adsorption conveyor belts 520. The output conveyor belt 540 can receive and convey the electrode sheet bodies output by the adsorption conveyor belt 520.

[0071] It is worth noting that before the driving structure 510 drives the pole piece belt to move forward, the adsorption conveyor belt 520 is started to have a certain conveying speed, so that the speed of the pole piece belt when conveyed to the adsorption conveyor belt 520 is the same as the conveying speed of the adsorption conveyor belt 520, ensuring that there is no relative movement between the pole piece belt and the adsorption conveyor belt 520, so as to ensure that the pole piece belt will not be pulled and deformed. Before the pole piece belt is about to cover all the adsorption conveyor belts 520, the driving speed of the driving structure 510 and the conveying speed of the adsorption conveyor belt 520 are synchronously decelerated, and when the pole piece belt covers all the adsorption conveyor belts 520, the driving structure 510 and the adsorption conveyor belt 520 both stop conveying.

[0072] The driving structure 510 and the adsorption conveyor belt 520 are used to drive the pole piece material belt to move, so that the pole piece material belt is continuously set on several adsorption conveyor belts 520, and then, the cutting structure 530 is used to cut the pole piece material belt between two adjacent adsorption conveyor belts 520. Therefore, the pole piece material belt can be cut into multiple pole piece bodies at one time, and the output conveyor belt 540 is used to realize the transportation of multiple pole piece bodies, thereby improving the cutting efficiency and transportation efficiency of the pole piece.

[0073] It is worth noting that if Figure 5 As shown, the driving direction of the driving structure 510, the conveying direction of the adsorption conveyor belt 520 and the conveying direction of the output conveyor belt 540 are arranged in the same direction.

[0074] For further explanation, please refer to Figure 5 In this embodiment, four adsorption conveyor belts 520 are provided, and three cutting structures 530 are provided. When the three cutting structures 530 perform cutting work at the same time, the pole piece strip can be cut to form three pole piece bodies, each of which includes a pole piece unit; when only the cutting structure 530 located in the middle position performs cutting work, the pole piece strip can be cut to form a pole piece body, each of which includes two continuous pole piece units. Of course, more adsorption conveyor belts 520 and cutting structures 530 can also be provided, and more pole piece bodies can be cut to form, each of which can include one or more pole piece units.

[0075] In this embodiment, if Figure 5 As shown, the width of each adsorption conveyor belt 520 is the same as the width of the pole piece unit formed by cutting. It is worth noting that the width of each adsorption conveyor belt 520 can also be an integer multiple (n times) of the width of each pole piece unit, such as 2 times, 3 times, etc. Therefore, when several cutting structures 530 work at the same time, the pole piece strip can be cut to form several pole piece bodies, each of which includes n pole piece units.

[0076] like Figure 6As shown, the adsorption conveyor belt 520 includes an adsorption area 521 and a release area 522, which are arranged along the conveying direction of the adsorption conveyor belt 520, and the release area 522 is arranged on both sides of the adsorption area 521. The output conveyor belt 540 has a first conveying state with the same conveying speed as the adsorption conveyor belt 520, and also has a second conveying state with a conveying speed greater than the adsorption conveyor belt 520.

[0077] During the process of transferring the pole sheet from the adsorption conveyor belt 520 to the output conveyor belt 540, the output conveyor belt 540 and the adsorption conveyor belt 520 maintain the same conveying speed to ensure that the adsorption conveyor belt 520 and the output conveyor belt 540 will not pull the pole sheet to ensure the quality of the pole sheet. After the pole sheet leaves the adsorption area 521 of the adsorption conveyor belt 520, the output conveyor belt 540 accelerates the conveying to increase the interval between adjacent pole sheets to prepare for the use of the pole sheet in the subsequent lamination process.

[0078] Specifically, in this embodiment, Figure 6 As shown, the adsorption conveyor belt 520 includes a belt body 523 and a conveyor roller 524. A pair of conveyor rollers 524 are arranged opposite to each other and the belt body 523 is wound around the pair of conveyor rollers 524. The portion of the belt body 523 between the pair of conveyor rollers 524 forms the above-mentioned adsorption area 521, and the portion of the belt body 523 corresponding to the pair of conveyor rollers 524 forms the above-mentioned release area 522.

[0079] In this embodiment, the output conveyor belt 540 is a vacuum adsorption structure.

[0080] It is worth noting that after the cutting is completed, several adsorption conveyor belts 520 synchronously convey several pole pieces forward. When the pole piece on the adsorption conveyor belt 520 close to the output conveyor belt 540 is conveyed forward to the output conveyor belt 540, the output conveyor belt 540 and the adsorption conveyor belt 520 simultaneously adsorb the pole piece and maintain a synchronous conveying speed to convey the pole piece forward. When the tail end of the pole piece enters the release area 522 from the adsorption area 521 of the adsorption conveyor belt 520, the output conveyor belt 540 maintains the adsorption of the pole piece and accelerates the conveying forward, so that a certain distance is generated between the pole piece and the pole piece behind it.

[0081] It should be further explained that after the cutting is completed and several adsorption conveyor belts 520 convey several pole pieces forward, the driving structure 510 synchronously drives the pole piece material belt forward so that the subsequent pole piece material belt is covered on the adsorption conveyor belt 520 again to prepare for the next cutting.

[0082] like Figure 5 and Figure 7As shown, the cutting structure 530 includes a support platform 531 and a cutting portion 532. The support platform 531 is located between two adjacent adsorption conveyor belts 520. The support surface of the support platform 531 is flush with the conveying surface of the adsorption conveyor belt 520. The cutting portion 532 is arranged corresponding to the support platform 531. The support platform 531 is arranged to support the pole piece strip during the cutting process, thereby ensuring the cutting stability and cutting accuracy of the pole piece strip.

[0083] It is worth noting that the cutting portion 532 is located directly above the supporting platform 531 .

[0084] In this embodiment, the cutting portion 532 is a laser cutting structure.

[0085] Of course, the cutting portion 532 may also be other types of cutting equipment.

[0086] like Figure 5 As shown, the driving structure 510 includes a pair of rollers 511 arranged at a relative interval, and at least one of the pair of rollers 511 is a driving roller. The pole piece strip passes between the pair of rollers 511, and the pole piece strip rolls with the pair of rollers 511. The pole piece strip is driven forward by the friction between the rollers 511 and the pole piece strip. The driving roller drives the pole piece strip, and the driving process is stable.

[0087] As another alternative embodiment, the electrode cutting and conveying device 500 may further include a die-cutting roller mechanism 550, such as Figure 8 As shown, the die-cutting roller mechanism 550 includes a correspondingly arranged die roller 551 and a punch roller 552, the die roller 551 is provided with a die cutting edge 5511, and the punch roller 552 is provided with a punch cutting edge 5521, the die cutting edge 5511 is matched with the punch cutting edge 5521, the pole piece strip passes between the die roller 551 and the punch roller 552, and is cut and formed by the cooperation of the die cutting edge 5511 and the punch cutting edge 5521.

[0088] It is worth mentioning that please refer to Figure 8 When multiple rows of pole piece units are formed on the pole piece material strip, and the pole ear arrangement directions of two adjacent rows of pole piece units are opposite, the above-mentioned die-cutting roller mechanism 550 can be used to roll cut the pole piece material strip, or a mirror-arranged laser cutting structure can be used for laser die-cutting. When multiple rows of pole piece units are formed on the pole piece material strip, and the pole ear arrangement directions of each row of pole piece units are the same, multiple rows of laser cutting structures can be arranged for laser die-cutting. The processed pole piece material strip can be transported to the subsequent process using a vacuum conveyor belt.

[0089] It should be noted that the electrode sheet strips mentioned in Example 2 include positive electrode sheet strips and negative electrode sheet strips, the electrode sheet bodies include positive electrode sheet bodies and negative electrode sheet bodies, and the electrode sheet units include positive electrode sheet units and negative electrode sheet units.

[0090] According to the above description, this patent application has the following advantages:

[0091] 1. A positive electrode sheet body including a plurality of positive electrode sheet units and a negative electrode sheet body including a plurality of negative electrode sheet units are stacked to form a battery cell, and then a hot pressing separation mechanism is used to hot press and cut the battery cell into a plurality of battery cell monomers. Therefore, multiple battery cells can be stacked at one time, and the battery cell production efficiency is high;

[0092] 2. Use four retrieving structures to reciprocate to retrieve and load materials, so as to achieve simultaneous stacking of two battery cells and improve stacking efficiency.

[0093] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A lamination production line, characterized in that: include: A laminating device (100), a positive electrode production conveyor line (200) and a negative electrode production conveyor line (300), the laminating device (100) comprising a laminating mechanism (110), a feeding mechanism (120) and a swing unwinding mechanism, the laminating mechanism (110) being arranged with a plurality of circumferentially spaced members suitable for laminating to form a battery core, the feeding mechanism (120) being rotatably arranged above the laminating mechanism (110), the feeding mechanism (120) comprising a plurality of circumferentially arranged material taking structures (121), the plane where the plurality of material taking structures (121) are located is arranged in parallel with the plane where the plurality of stacking mechanisms (110) are located, the material taking structures (121) are suitable for alternately feeding a positive electrode sheet body (610) containing a plurality of positive electrode sheet units (611) or a negative electrode sheet body (710) containing a plurality of negative electrode sheet units (711) to each stacking mechanism (110), and the swing unwinding mechanism is arranged corresponding to the stacking mechanism (110), and is suitable for driving the diaphragm to move back and forth; A positive electrode sheet production conveyor line (200) and a negative electrode sheet production conveyor line (300), wherein the positive electrode sheet production conveyor line (200) and the negative electrode sheet production conveyor line (300) both comprise an electrode sheet production tab device (400) and an electrode sheet cutting and conveying device (500) which are arranged in sequence, wherein the electrode sheet cutting and conveying device (500) comprises: a driving structure (510) which is suitable for driving a positive electrode sheet material belt (600) or a negative electrode sheet material belt (700); an adsorption conveyor belt (520) which is arranged downstream of the driving structure (510), wherein a plurality of adsorption conveyor belts (520) are arranged at intervals along the driving direction of the driving structure (510); and a cutting structure ( 530), arranged at the interval between two adjacent adsorption conveyor belts (520); an output conveyor belt (540), arranged downstream of a plurality of the adsorption conveyor belts (520), suitable for receiving and conveying the positive electrode sheets (610) or the negative electrode sheets (710) output by the adsorption conveyor belts (520); the electrode sheet cutting and conveying device (500) is suitable for cutting the positive electrode sheet material belt (600) or the negative electrode sheet material belt (700) into a plurality of positive electrode sheets (610) or a plurality of negative electrode sheets (710), and conveying the plurality of positive electrode sheets (610) or a plurality of negative electrode sheets (710) toward the lamination device (100); The adsorption conveyor belt (520) comprises an adsorption zone (521) and a release zone (522), wherein the adsorption zone (521) and the release zone (522) are arranged along the conveying direction of the adsorption conveyor belt (520), and the release zone (522) is arranged on both sides of the adsorption zone (521). The output conveyor belt (540) has a first conveying state having the same conveying speed as the adsorption conveyor belt (520), and also has a second conveying state having a conveying speed greater than that of the adsorption conveyor belt (520), wherein the first conveying state The first state is when the pole piece body on the adsorption conveyor belt (520) close to the output conveyor belt (540) is transported forward to the output conveyor belt (540), the output conveyor belt (540) and the adsorption conveyor belt (520) simultaneously adsorb the pole piece body and maintain a synchronous conveying speed, and the second conveying state is when the tail end of the pole piece body enters the release area (522) from the adsorption area (521) of the adsorption conveyor belt (520), the output conveyor belt (540) maintains adsorption on the pole piece body and accelerates the forward conveying.

2. The lamination production line according to claim 1, characterized in that: The lamination production line further comprises a positive electrode deviation correction mechanism (140) and a negative electrode deviation correction mechanism (150), and the loading mechanism (120) is suitable for switching between the positive electrode deviation correction mechanism (140), the negative electrode deviation correction mechanism (150) and a plurality of the lamination mechanisms (110).

3. The lamination production line according to claim 2, characterized in that: Two stacking mechanisms (110) are arranged at relative intervals, four material taking structures (121) are arranged at intervals along the circumferential direction, and the feeding mechanism (120) reciprocates in a vertical direction to drive the material taking structure (121) to switch between the adjacent positive electrode deviation correction mechanism (140) and the stacking mechanism (110), and the adjacent negative electrode deviation correction mechanism (150) and the stacking mechanism (110).

4. The lamination production line according to claim 3, characterized in that: The feeding mechanism (120) further comprises a lifting drive structure, and the lifting drive structure is drivingly connected to the four material taking structures (121).

5. The lamination production line according to claim 3, characterized in that: The positive pole deviation correction mechanism (140) and the negative pole deviation correction mechanism (150) are arranged between the two stacking mechanisms (110) and are arranged with a relative spacing, and the straight line where the two stacking mechanisms (110) are located is perpendicular to the straight line where the positive pole deviation correction mechanism (140) and the negative pole deviation correction mechanism (150) are located.

6. The lamination production line according to any one of claims 3 to 5, characterized in that: Each stacking mechanism (110) is provided with a plurality of stacking positions, the positive electrode deviation correction mechanism (140) is provided with a plurality of positive electrode deviation correction positions, the negative electrode deviation correction mechanism (150) is provided with a plurality of negative electrode deviation correction positions, and the material taking structure (121) is capable of simultaneously transporting a plurality of the positive electrode sheets (610) or a plurality of the negative electrode sheets (710).

7. The lamination production line according to any one of claims 1 to 5, characterized in that: The material taking structure (121) is an adsorption structure.

8. The lamination production line according to claim 1, characterized in that: The lamination production line further comprises a hot pressing and separation mechanism (130), which is arranged downstream of the lamination mechanism (110), and is suitable for hot pressing and cutting the battery core into a plurality of battery core monomers.

9. The lamination production line according to claim 8, characterized in that: A transfer mechanism (160) is provided between the stacking mechanism (110) and the hot pressing separation mechanism (130).

10. The lamination production line according to claim 1, characterized in that: The tail end of the positive electrode film production conveying line (200) and the tail end of the negative electrode film production conveying line (300) are both arranged corresponding to the film stacking device (100).

11. The lamination production line according to claim 1, characterized in that: The electrode sheet cutting and conveying device (500) comprises a die-cutting roller mechanism (550), wherein the die-cutting roller mechanism (550) comprises a correspondingly arranged concave die roller (551) and a convex die roller (552), wherein the concave die roller (551) is provided with a concave die cutting edge (5511), and the convex die roller (552) is provided with a convex die cutting edge (5521), wherein the concave die cutting edge (5511) and the convex die cutting edge (5521) are matched with each other, and a positive electrode sheet material strip (600) or a negative electrode sheet material strip (700) is allowed to pass between the concave die roller (551) and the convex die roller (552), and the concave die cutting edge (5511) and the convex die cutting edge (5521) are suitable for cooperating in cutting the positive electrode sheet material strip (600) or the negative electrode sheet material strip (700).

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