CN115036556A - Lamination device and lamination production line - Google Patents

Abstract

The invention provides a lamination device and a lamination production line, belonging to the technical field of lithium battery manufacturing equipment. It is rotatably arranged above the stacking mechanism, and the feeding mechanism includes several reclaiming structures arranged along the circumferential direction. The reclaiming structure is suitable for alternately feeding the positive electrode sheet body or the negative electrode sheet body to each of the stacking mechanisms; the swing unwinding mechanism, corresponding to the stacking mechanism, is suitable for driving the diaphragm to move back and forth. The lamination device provided by the present invention can perform lamination on several lamination mechanisms at the same time, thereby improving lamination efficiency, and in the subsequent processing process, a hot-pressing separation mechanism is used to cut the cell to form several electric cells. Therefore, multiple cells can be formed by lamination at one time, and the production efficiency of the cells is high.

Description

A lamination device and lamination production line

technical field

The invention relates to the technical field of lithium battery manufacturing equipment, in particular to a lamination device and a lamination production line.

Background technique

Lamination technology is one of the lithium-ion battery manufacturing technologies. The speed and precision of the lamination technology directly determine the production capacity of the lithium-ion production line and the cost of cell manufacturing. During the preparation of the battery cell, the positive and negative electrodes need to be alternately stacked, and at the same time, there must be a separator between the positive and negative electrodes. Therefore, in one production process, the lamination device can only produce one cell, and the production efficiency is low.

SUMMARY OF THE INVENTION

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, so as to provide a lamination device and a lamination production line.

In order to solve the above-mentioned problems, the present invention provides a stacking device, comprising: a stacking mechanism, which is arranged at intervals along the circumferential direction, and is suitable for stacking sheets to form batteries; a feeding mechanism, which is rotatably arranged with the Above the stacking mechanism, the feeding mechanism includes several reclaiming structures arranged in the circumferential direction, the planes where the several reclaiming structures are located are arranged in parallel with the planes where the several stacking mechanisms are located, and the reclaiming structures are located in parallel. It is suitable for alternately feeding a positive plate body including several positive plate units or a negative plate body including several negative plate units to each of the stacking mechanisms; a swing unwinding mechanism is provided corresponding to the stacking mechanism , suitable for driving the diaphragm to move back and forth.

Optionally, the lamination device further includes a positive electrode rectification mechanism and a negative electrode rectification mechanism, and the feeding mechanism is suitable for switching among the positive electrode rectification mechanism, the negative electrode rectification mechanism, and a plurality of the stacking mechanisms.

Optionally, two of the stacking mechanisms are arranged at relative intervals, and four of the reclaiming structures are arranged at intervals along the circumferential direction, and the feeding mechanism reciprocates around the vertical direction to drive the reclaiming structures to move in the vertical direction. The adjacent positive electrode rectification mechanisms and the stacking mechanisms are switched between the adjacent negative electrode rectification mechanisms and the stacking mechanisms.

Optionally, the feeding mechanism further includes a lifting driving structure, and the lifting driving structure is drivingly connected with the four reclaiming structures.

Optionally, the positive electrode rectification mechanism and the negative electrode rectification 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 the same as the positive electrode rectification mechanism and the negative electrode rectification mechanism. The straight lines where the negative rectifying mechanism is located are perpendicular to each other.

Optionally, each of the stacking mechanisms is provided with several stacking positions, the positive bias correction mechanism is provided with several positive bias correction positions, the negative bias correction mechanism is provided with several negative bias correction positions, and the negative bias correction mechanism is provided with several negative bias correction positions. The reclaiming structure can transport several of the positive electrode sheets or several of the negative electrode sheets at the same time.

Optionally, the reclaiming structure is an adsorption structure.

The present invention also provides a lamination production line, comprising the above lamination device.

Optionally, the lamination production line further includes a hot-pressing separation mechanism, the hot-pressing separation mechanism is arranged downstream of the stacking mechanism, and the hot-pressing separation mechanism is suitable for hot-pressing and cutting the battery cells. Cut to form several battery cells.

Optionally, a transfer mechanism is provided between the stacking mechanism and the hot-pressing separation mechanism.

Optionally, the lamination production line further includes a positive electrode sheet conveying line and a negative electrode sheet conveying line. Device corresponding settings.

Optionally, the positive electrode production line and the negative electrode production line both include a pole piece tab making device and a pole piece cutting and conveying device arranged in sequence, and the pole piece cutting and conveying device is suitable for cutting the positive electrode. The sheet material belt or the negative electrode sheet material belt is cut to form a plurality of positive electrode sheet bodies or a plurality of negative electrode sheet bodies, and the plurality of positive electrode sheet bodies or a plurality of negative electrode sheet bodies are conveyed toward the lamination device.

Optionally, the pole piece cutting and conveying device includes: a driving mechanism, suitable for driving the positive electrode sheet material belt or the negative electrode sheet material belt; an adsorption conveyor belt, arranged downstream of the driving mechanism, the adsorption conveyor belt along the The driving direction of the driving mechanism is provided with several intervals; the cutting structure is provided at the interval between two adjacent adsorption conveyor belts; the output conveyor belt is provided downstream of several adsorption conveyor belts, and is suitable for receiving and The positive electrode sheet or the negative electrode sheet outputted by the adsorption conveyor belt is conveyed.

Optionally, the adsorption conveyor belt includes an adsorption area and a release area, the adsorption area and the release area are arranged along the conveying direction of the adsorption conveyor belt, and the release area is arranged on both sides of the adsorption area, The output conveyor belt has a first conveying state that is the same as the conveying speed of the suction conveying belt, and also has a second conveying state that is greater than the conveying speed of the suction conveying belt.

Optionally, the pole piece cutting and conveying device includes a die-cutting roller mechanism, and the die-cutting roller mechanism includes a correspondingly arranged concave die roller and a convex die roller, and the concave die roller is provided with a concave die edge, so The punch roller is provided with a punch edge, the punch edge is adapted to the punch, and a positive electrode sheet material strip or a negative electrode sheet is allowed between the punch roller and the punch roller. The material strip is passed through, and the cutting edge of the female die and the cutting edge of the convex die are suitable for cooperating with cutting the positive electrode sheet material tape or the negative electrode sheet material tape.

The present invention has the following advantages:

1. A lamination device provided by the present invention realizes the feeding of several lamination mechanisms during the rotation of several reclaiming structures, so lamination can be performed on several lamination mechanisms at the same time, which improves the performance of lamination. In addition, the positive electrode sheet body containing several positive electrode sheet units and the negative electrode sheet body containing several negative electrode sheet units are stacked at the same time to form a battery cell, and the hot pressing separation mechanism is used in the subsequent processing process. After the battery cell is cut to form a number of battery cell single cells, multiple battery cells can be laminated at one time to form a plurality of battery cells, and the production efficiency of the battery cells is high.

2. A lamination device provided by the present invention uses the positive electrode deviation correction mechanism and the negative electrode deviation correction mechanism to rectify the deviation of the positive electrode sheet body containing several positive electrode sheet units and the negative electrode sheet body containing several negative electrode sheet units at the same time, and then use the upper The feeding mechanism feeds the laminations to the stacking table mechanism to ensure the lamination accuracy.

3. In a lamination device provided by the present invention, the number of reclaiming structures is set to four as an example. When two reclaiming structures correspond to the positive electrode rectifying mechanism and the negative rectifying mechanism respectively, the other two reclaim materials. The structure is correspondingly arranged with two stacking mechanisms for stacking, and the feeding mechanism can realize material reclaiming and stacking at the same time in one rotation process, and the feeding mechanism has no empty stroke, which improves the feeding efficiency.

4. In a lamination device provided by the present invention, by setting a number of lamination positions on a stacking mechanism, correspondingly, a number of positive correction positions are set on a positive correction mechanism, and a number of positive correction positions are set on a negative correction mechanism. Therefore, the stacking of several battery cells can be realized at the same time on one stacking mechanism, and the production efficiency of the battery cells can be improved.

5. A lamination production line provided by the present invention is provided with a pole piece cutting and conveying device, and uses 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, Then, the pole piece material belt is cut between two adjacent suction conveyor belts by the cutting structure, so the pole piece material belt can be cut at one time to form a plurality of pole piece bodies, and the output conveyor belt can be used to realize a plurality of pole piece bodies. The conveying of the sheet body improves the cutting efficiency and conveying efficiency of the pole piece.

6. In the lamination production line provided by the present invention, in the process of transferring the pole pieces 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 are not The pole piece body will be pulled to ensure the quality of the pole piece body. After the pole piece body is separated from the adsorption area of the adsorption conveyor belt, the output conveyor belt will accelerate the conveying, so as to increase the interval between adjacent pole piece bodies, for the subsequent lamination. The procedure is prepared using the pole piece body.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 shows a schematic structural diagram of a lamination device provided in Embodiment 1 of the present invention;

FIG. 2 shows a schematic structural diagram of a lamination production line provided in Embodiment 2 of the present invention;

3 shows the first structural schematic diagram of the pole piece material tape, the pole piece body and the pole piece unit provided in Embodiment 1 of the present invention;

Fig. 4 shows the second structural schematic diagram of the pole piece material tape, the pole piece body and the pole piece unit provided in Embodiment 1 of the present invention;

5 shows a schematic diagram of the overall structure of the pole piece cutting and conveying device provided in Embodiment 2 of the present invention;

6 shows a schematic structural diagram of the adsorption conveyor belt provided in Embodiment 2 of the present invention;

FIG. 7 shows a partial structural schematic diagram of the pole piece cutting and conveying device provided in Embodiment 2 of the present invention;

FIG. 8 shows a schematic structural diagram of a die-cutting roll mechanism provided by an alternative embodiment of the present invention.

Description of reference numbers:

100, stacking device; 110, stacking mechanism; 111, stacking table; 120, feeding mechanism; 121, reclaiming structure; 130, hot pressing separation mechanism; 140, positive electrode correction mechanism; 150, negative electrode correction mechanism; 160 , transfer mechanism; 161, blanking manipulator; 162, transfer manipulator; 200, positive electrode production conveyor line; 300, negative electrode production conveyor line; 400, pole piece pole ear device; 500, pole piece cutting and conveying device; 510 511, roller body; 520, adsorption conveyor belt; 521, adsorption area; 522, release area; 523, belt body; 524, conveying roller; 530, cutting structure; 531, support table; 532, cutting part 540, output conveyor belt; 550, die-cutting roller mechanism; 551, concave die roll; 5511, concave die cutting edge; 552, punch roll; 5521, punch die cutting edge; 600, positive sheet material belt; 610, positive pole Sheet body; 611, positive electrode sheet unit; 700, negative electrode sheet material belt; 710, negative electrode sheet body; 711, negative electrode sheet unit.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

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.

Example 1

A specific embodiment of the stacking device as shown in FIG. 1 and FIG. 2 includes a stacking mechanism 110 , a feeding mechanism 120 and a swing feeding mechanism. Several stacking mechanisms 110 are arranged at intervals along the circumferential direction, and the stacking mechanism 110 is suitable for stacking sheets to form battery cells. The feeding mechanism 120 is rotatably arranged above the stacking mechanism 110. The feeding mechanism 120 includes a plurality of reclaiming structures 121 arranged along the circumferential direction. parallel. During the rotation of the feeding mechanism 120 , the feeding structure 121 alternately feeds the positive electrode sheet 610 or the negative electrode sheet 710 onto each stacking mechanism 110 . The swinging and discharging mechanism is arranged corresponding to the stacking mechanism 110 , and the swinging and discharging mechanism is suitable for driving the diaphragm to move back and forth, so as to stack the diaphragm between the positive electrode body 610 and the negative electrode body 710 .

It is worth noting that, referring to FIG. 3 and FIG. 4 , the above-mentioned positive electrode sheet body 610 includes several consecutively arranged positive electrode sheet units 611 , and the above-mentioned negative electrode sheet body 710 includes several consecutively arranged negative electrode sheet units 711 , as shown in FIG. 3 . As shown, several positive electrode units 611 or several negative electrode units 711 can be continuously arranged in a row. As shown in FIG. 4 , several positive electrode units 611 or several negative electrode units 711 can be continuously arranged in two rows. Certainly, several positive electrode sheet units 611 or several negative electrode sheet units 711 may also be continuously arranged in multiple rows and multiple columns.

It should be further explained that, referring to FIG. 4 , the positive electrode sheet body 610 or the negative electrode sheet body 710 includes two consecutive rows of positive electrode sheet units 611 or negative electrode sheet units 711 , the positive electrode sheet unit 611 in the upper row and the positive electrode sheet unit in the lower row 611, or between the upper row of the negative electrode sheet unit 711 and the lower row of the negative electrode sheet unit 711 is a non-coated area, and the electrode tab is made above the upper row of the positive electrode sheet unit 611 or the negative electrode sheet unit 711. The tabs are formed under the positive electrode sheet unit 611 or the negative electrode sheet unit 711 .

During the rotation of several reclaiming structures 121, the feeding of several stacking mechanisms 110 is realized, so that stacking can be performed on several stacking mechanisms 110 at the same time, which improves the stacking efficiency. The positive electrode sheet body 610 of the sheet unit 611 and the negative electrode sheet body 710 including several negative electrode sheet units 711 are laminated to form a battery cell, and the hot-pressing separation mechanism 130 is used to cut the battery cell into several battery cells in the subsequent processing process. The cell is a single cell, therefore, multiple cells can be formed by lamination at one time, and the production efficiency of the cell is high.

As shown in FIGS. 1 and 2 , the lamination device 100 further includes a positive electrode rectification mechanism 140 and a negative electrode rectification mechanism 150 , and the feeding mechanism 120 can be switched between the positive electrode rectification mechanism 140 , the negative electrode rectification mechanism 150 and several stacking mechanisms 110 . Specifically, in this embodiment, as shown in FIG. 1 , two stacking mechanisms 110 are arranged at opposite intervals, four reclaiming structures 121 are arranged at intervals in the circumferential direction, and the feeding mechanisms 120 reciprocate around the vertical direction. The reclaiming structure 121 is driven to switch between the adjacent positive electrode rectification mechanism 140 and the stacking mechanism 110 , the negative electrode rectifying mechanism 150 and the stacking mechanism 110 .

It is worth noting that the “vertical direction” in the above-mentioned “reciprocating rotation of the feeding mechanism 120 around the vertical direction” is the direction perpendicular to the drawing in FIG. 1 , that is, the rotation center of the four reclaiming structures 121 .

After the positive electrode body 610 and the negative electrode body 710 are rectified by the positive electrode rectifying mechanism 140 and the negative electrode rectifying mechanism 150, the stacking mechanism 110 is loaded and stacked by the feeding mechanism 120 to ensure the stacking accuracy. In addition, the number of reclaiming structures 121 is set to four, and when two reclaiming structures 121 are respectively corresponding to the positive rectifying mechanism 140 and the negative rectifying mechanism 150, the other two reclaiming structures 121 are respectively connected to two stacking mechanisms. 110 is correspondingly set to perform lamination, and the feeding mechanism 120 can simultaneously realize material reclaiming and lamination in one rotation process, and the feeding mechanism 120 has no empty stroke, which improves the feeding efficiency.

In this embodiment, as shown in FIG. 1 , the positive electrode rectification mechanism 140 and the negative electrode rectification mechanism 150 are arranged between the two stacking mechanisms 110 and are relatively spaced apart. It is perpendicular to the straight line where the negative electrode deviation correction mechanism 150 is located. Therefore, the reciprocating rotation angle of the feeding mechanism 120 is 90°.

Of course, the straight line where the two stacking mechanisms 110 are located and the straight line where the positive electrode rectifying mechanism 140 and the negative electrode rectifying mechanism 150 are located can also be set at other angles. The negative electrode rectifying mechanism 150 and the stacking mechanism 110 can cooperate with each other to complete reclaiming and feeding.

It is worth noting that the rotation centers of the four reclaiming structures 121 and the straight lines where the two stacking mechanisms 110 are located coincide with the intersections of the straight lines where the positive rectifying mechanism 140 and the negative rectifying mechanism 150 are located.

In this embodiment, the positive electrode deviation correction mechanism 140 includes a positive electrode deviation correction stage, and a push portion is provided on the positive electrode deviation correction stage, and the push portion can push the positive electrode sheet body 610 in different directions to move the positive electrode sheet body 610 to a predetermined position; the negative electrode deviation correction The mechanism 150 includes a negative electrode deviation correction stage, and a push portion is provided on the negative electrode deviation correction stage. The push portion can push the negative electrode sheet body 710 in different directions to move the negative electrode sheet body 710 to a predetermined position.

Of course, the positive deviation rectification mechanism 140 and the negative deviation rectification mechanism 150 may also be other structures capable of deviation rectification, such as deviation rectification belts.

In this embodiment, the feeding mechanism 120 further includes a lift drive structure, and the lift drive structure is drivingly connected with the four reclaiming structures 121 to drive the four reclaiming structures 121 to move synchronously in the vertical direction. By setting up the lifting drive structure, the four reclaiming structures 121 are vertically higher than the positive rectifying mechanism 140, the negative rectifying mechanism 150 and the stacking mechanism 110, and then rotate to avoid the reclaiming structure 121 and the positive rectifying mechanism 140 and the negative electrode. The deviation correction mechanism 150 and the stacking mechanism 110 interfere.

In this embodiment, each stacking mechanism 110 includes a stacking stage 111, each stacking stage 111 is provided with a stacking position, the positive deviation rectification stage is set with a positive deviation rectification position, and the negative deviation rectification stage is set with a A negative electrode deviation correction position, therefore, in one lamination process, the lamination of two cells can be carried out at the same time.

It should be noted that, in other alternative embodiments, each lamination stage 111 is provided with several lamination positions, the positive deviation correction stage is provided with several positive deviation correction positions, and the negative deviation correction stage is provided with several negative electrodes. In the deviation correction position, each reclaiming structure 121 can transport several positive electrode bodies 610 or several negative electrode bodies 710 at the same time; or, each stacking mechanism 110 includes several stacking tables 111, each 111 is provided with a lamination position, each positive rectification mechanism 140 includes several positive rectification stages, each positive rectification stage is provided with a positive rectification position, and each negative rectification mechanism 150 includes several negative rectification stages, each of which is A negative electrode deviation correction position is set on the negative electrode deviation correction stage, and each reclaiming structure 121 can transport several positive electrode sheet bodies 610 or several negative electrode sheet bodies 710 at the same time. Therefore, through the above two methods, in one lamination process, on one lamination mechanism 110 , the lamination of several cells can be performed simultaneously, that is, several cells are produced at the same time, which improves the production efficiency. In addition, each swinging and discharging mechanism can simultaneously discharge material to several stacking positions corresponding to it, and there is no need to provide redundant swinging and discharging mechanisms, which simplifies the overall structure of the stacking device 100 .

It should be further noted that, if one stacking mechanism 110 includes n stacking positions, one positive rectifying mechanism 140 includes n positive rectifying positions, and one negative rectifying mechanism 150 includes n negative rectifying positions, then one stacking mechanism 110 can The stacking of n cells is performed at the same time, then, since the stacking device 100 includes two stacking mechanisms 110 , the stacking device 100 can simultaneously stack 2n cells.

In this embodiment, the feeding mechanism 120 is a manipulator, and the reclaiming structure 121 is an adsorption structure disposed on the manipulator.

When using the lamination device 100 of this embodiment, when lamination is performed for the first time, the position shown in FIG. 2 is used as the initial position. First, the pick-up structure 121 on the upper side sucks the negative electrode sheet body 710, and the pick-up structure 121 on the lower side sucks the negative electrode sheet body 710. The material structure 121 does not absorb the positive electrode body 610, and the four reclaiming structures 121 rotate 90° counterclockwise synchronously. The two reclaiming structures 121 corresponding to the rectifying mechanism 140 and the negative rectifying mechanism 150 absorb the positive electrode body 610 and the negative electrode body 710 respectively; then, the four reclaiming structures 121 rotate 90 degrees clockwise synchronously, and absorb the negative electrode body 710 The reclaiming structure 121 places the negative electrode body 710 on the stacking table 111 on the right side, and the reclaiming structure 121 with the positive electrode body 610 absorbs the positive electrode body 610 and places it on the stacking table 111 on the left; Finally, repeat the above steps to complete the lamination. It is worth noting that, for each stack of positive or negative plates, the oscillating discharge mechanism needs to cooperate to discharge the diaphragm.

It should be noted that in the process of laminating the cell, the lowermost and uppermost layers of the cell are both the structure of the negative electrode sheet wrapped by the diaphragm, that is, when stacking, the negative electrode sheet usually needs to be stacked first, and the last stacking is performed. Negative electrode sheets also need to be stacked, so the negative electrode sheet bodies 710 are first stacked on both stacking tables 111 .

Example 2

A specific embodiment of the lamination production line shown in FIG. 2 and FIG. 5 to FIG. 7 includes the lamination device 100 of Example 1.

As shown in FIG. 2 , the lamination device 100 further includes a hot-pressing separation mechanism 130 . The hot-pressing separation mechanism 130 is disposed downstream of the stacking mechanism 110 . Cutting is performed at the same time of hot pressing to form several battery cells, and the battery cells can be transported to the subsequent process through the transfer conveyor belt.

It is worth noting that by stacking the positive electrode sheet body 610, the separator and the negative electrode sheet body 710, a battery cell can be formed, and the battery cell can be cut according to the positions of the positive electrode sheet unit 611 and the negative electrode sheet unit 711. Each battery cell includes a positive electrode sheet unit 611 , a separator, and a negative electrode sheet unit 711 that are arranged in layers.

As shown in FIG. 2 , a transfer mechanism 160 is provided between the stacking mechanism 110 and the hot-pressing separation mechanism 130 , and the cells that have been stacked on the stacking mechanism 110 are transferred to the hot-pressing separation mechanism 130 through the transfer mechanism 160 for hot-pressing. with the cut.

Specifically, in this embodiment, as shown in FIG. 2 , the transfer mechanism 160 includes a blanking manipulator 161 and a transfer manipulator 162 . The blanking manipulator 161 removes the cells from the stacking mechanism 110 and hands them over to the transfer manipulator 162 . The transfer robot 162 then transports the battery cells to the hot-pressing separation mechanism 130 .

It should be noted that, referring to FIG. 2 , the unloading manipulator 161 moves in the left-right direction, and the transfer manipulator 162 moves in the up-down direction.

As shown in FIG. 2 , the lamination production line further includes a positive electrode sheet conveying line 200 and a negative electrode sheet conveying line 300 . corresponding settings. Specifically, the tail end of the positive electrode sheet conveying line 200 is set corresponding to the positive electrode deviation correction mechanism 140 , and the tail end of the negative electrode sheet conveying line 300 is set corresponding to the negative electrode deviation correction mechanism 150 .

As shown in FIG. 2 , the positive electrode production line 200 and the negative electrode production line 300 both include a pole piece tab making device 400 and a pole piece cutting and conveying device 500 arranged in sequence. The pole piece tab making device 400 can The tabs 600 or the negative tabs 700 are formed on the tabs, and the pole tab cutting and conveying device 500 is suitable for cutting the tabs 600 or the negative tabs 700 to form the tabs 610 or negatives. sheet body 710 , and transport the positive electrode sheet body 610 or the negative electrode sheet body 710 toward the stacking device 100 . The output end of the pole piece cutting and conveying device 500 is set corresponding to the positive electrode deviation correction mechanism 140 or the negative electrode deviation correction mechanism 150 .

As shown in FIG. 5 to FIG. 7 , the pole piece 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 adapted to drive the pole piece material belt to move toward the suction conveyor belt 520 . The cutting structure 530 is disposed corresponding to the interval between two adjacent suction conveyor belts 520 , and the cutting structure 530 can cut the pole piece material tapes located on several suction conveyor belts 520 to form several pole piece bodies. The output conveyor belt 540 is disposed downstream of the plurality of suction conveyor belts 520 , and the output conveyor belt 540 can receive and transport the pole pieces output by the suction conveyor belt 520 .

It is worth noting that, before the driving structure 510 drives the pole piece material belt to move forward, the adsorption conveyor belt 520 is activated to have a certain conveying speed, so that the speed of the pole piece material belt conveyed to the adsorption conveyor belt 520 is the same as the adsorption conveyance. The conveying speed of the belt 520 is the same to ensure that there is no relative movement between the pole piece material belt and the adsorption conveyor belt 520, so as to ensure that the pole piece material belt will not be pulled and deformed. When the pole piece material belt is about to cover all the suction conveyor belts 520, the driving speed of the driving structure 510 and the conveying speed of the suction conveyor belt 520 are decelerated synchronously, and when the pole piece material belt covers all the suction conveyor belts 520, the driving structure 510 and the suction conveyor belt 520 are decelerated synchronously. The conveyor belts 520 are all stopped.

The pole piece material belt is driven by the driving structure 510 and the suction conveyor belt 520 to move, so that the pole piece material belt is continuously arranged on several suction conveyor belts 520, and then, the pole piece material belt is moved on two adjacent suction conveyor belts by the cutting structure 530 The strips are cut between the belts 520. Therefore, the pole piece material can be cut into a plurality of pole piece bodies at one time, and the output conveyor belt 540 is used to realize the transportation of the plurality of pole piece bodies, which improves the cutting efficiency and transportation of the pole piece. efficiency.

It should be noted that, as shown in FIG. 5 , the driving direction of the driving structure 510 , the conveying direction of the suction conveyor belt 520 and the conveying direction of the output conveyor belt 540 are arranged in the same direction.

It should be further explained that, referring to FIG. 5 , in this embodiment, there are four suction conveyor belts 520 and three cutting structures 530 . When the three cutting structures 530 perform the cutting work at the same time, the pole piece material strips can be cut to form three pole piece bodies, each of which includes a pole piece unit; when only the cutting structure 530 in the middle position performs the cutting work , the pole piece material strip can be cut to form a pole piece body, and each pole piece body includes two continuous pole piece units. Of course, more suction conveyor belts 520 and cutting structures 530 may be provided, and more pole piece bodies may be formed by cutting, and each pole piece body may include one or several pole piece units.

In this embodiment, as shown in FIG. 5 , the width of each suction 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 suction conveyor belt 520 may 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 simultaneously , the pole piece material strip can be cut to form several pole piece bodies, and each pole piece body includes n pole piece units.

As shown in FIG. 6 , the adsorption conveyor belt 520 includes an adsorption area 521 and a release area 522 . The output conveyor 540 has a first conveying state that is the same as the conveying speed of the suction conveying belt 520 , and also has a second conveying state that is greater than the conveying speed of the suction conveying belt 520 .

During the transfer of the pole piece body from the suction conveyor belt 520 to the output conveyor belt 540, the output conveyor belt 540 and the suction conveyor belt 520 maintain the same conveying speed to ensure that the suction conveyor belt 520 and the output conveyor belt 540 will not cause any damage to the pole piece body. Pull to ensure the quality of the pole piece body. After the pole piece body is separated from the adsorption area 521 of the adsorption conveyor belt 520, the output conveyor belt 540 accelerates the conveyance to increase the interval between adjacent pole piece bodies for the subsequent lamination process. The pole piece is ready.

Specifically, in this embodiment, as shown in FIG. 6 , the adsorption conveying belt 520 includes a belt body 523 and a conveying roller 524 . The part of the belt body 523 between the pair of conveying rollers 524 forms the above-mentioned adsorption area 521 , and the part of the belt body 523 corresponding to the pair of conveying rollers 524 forms the above-mentioned releasing area 522 .

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

It is worth noting that, after the cutting is completed, several adsorption conveyor belts 520 synchronously transport several pole piece bodies forward, when the pole piece body on the adsorption conveyor belt 520 close to the output conveyor belt 540 is forwarded to the output conveyor belt. On 540, the output conveyor belt 540 and the adsorption conveyor belt 520 simultaneously adsorb the pole piece body and transport the pole piece body forward at a synchronous conveying speed. When the tail end of the pole piece body enters the release area 522 from the suction area 521 of the suction conveyor belt 520, the output conveyor belt 540 maintains the suction of the pole piece body, and accelerates the forward transport, so that the pole piece body and the A certain distance is generated between the rear pole piece bodies.

It should be further explained that when the cutting is completed and the plurality of adsorption conveyor belts 520 are transporting the plurality of pole piece bodies forward, the driving structure 510 synchronously drives the pole piece material belt forward, so that the subsequent pole piece material belt is covered with the adsorption belt again. On the conveyor belt 520, ready for the next cutting.

As shown in FIG. 5 and FIG. 7 , the cutting structure 530 includes a support table 531 and a cutting part 532 , the support table 531 is located between two adjacent suction conveyor belts 520 , and the support surface of the support table 531 and the conveyance surface of the suction conveyor belt 520 Flush, the cutting part 532 is arranged corresponding to the support table 531 . By setting the support table 531 to support the pole piece material tape during the cutting process, the cutting stability and cutting precision of the pole piece material tape are ensured.

It should be noted that the cutting portion 532 is located just above the support table 531 .

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

Of course, the cutting part 532 can also be other types of cutting equipment.

As shown in FIG. 5 , the driving structure 510 includes a pair of roller bodies 511 arranged at opposite intervals, and at least one of the pair of roller bodies 511 is a driving roller. The pole piece material belt passes between a pair of roller bodies 511, and the pole piece material belt rolls in contact with the pair of roller bodies 511. The friction force between the roller body 511 and the pole piece material belt is used to counteract the pole piece material belt. front drive. The pole piece material belt is driven by the driving roller, and the driving process is stable.

As other alternative embodiments, the pole piece cutting and conveying device 500 may further include a die-cutting roller mechanism 550, as shown in FIG. The die roller 551 is provided with a concave die edge 5511, and the punch roller 552 is provided with a punch die edge 5521. The punch rolls 552 pass through, and are cut and shaped through the concave die edge 5511 and the punch die edge 5521.

It is worth noting that, referring to FIG. 8 , when multiple rows of pole piece units are processed and formed on the pole piece material belt, and the pole pieces of two adjacent rows are arranged in opposite directions, the above-mentioned die-cutting roller mechanism 550 can be used. Roll cut pole piece strips, or laser die cut with mirrored laser cut structures. When multiple rows of pole piece units are processed and formed on the pole piece material strip, and the pole tabs of each row of pole piece units are arranged in the same direction, multiple rows of laser cutting structures can be arranged for laser die cutting. The processed and formed pole piece material belt can be conveyed towards the subsequent process by using a vacuum conveyor belt.

It should be noted that the pole piece material belt mentioned in Example 2 includes a positive electrode piece material belt and a negative electrode piece material belt, the pole piece body includes a positive electrode piece body and a negative electrode piece body, and the pole piece unit includes a positive electrode piece unit and a negative electrode piece. unit.

According to the above description, the present patent application has the following advantages:

1. Use a positive electrode sheet body containing several positive electrode sheet units and a negative electrode sheet body containing several negative electrode sheet units for lamination to form a battery cell, and then use a hot-pressing separation mechanism to hot-press and cut the battery core to form several The cell is a single cell, therefore, multiple cells can be formed by lamination at one time, and the production efficiency of the cell is high;

2. The four reclaiming structures are used to reciprocate for reclaiming and feeding, so as to realize the simultaneous lamination of two cells and improve the lamination efficiency.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (15)

1. A lamination device, characterized in that, comprising: A stacking mechanism (110), which is arranged at intervals along the circumferential direction, and is suitable for stacking sheets to form battery cells; A feeding mechanism (120) is rotatably arranged above the stacking mechanism (110), the feeding mechanism (120) includes a plurality of reclaiming structures (121) arranged along the circumferential direction, and a plurality of the The plane on which the reclaiming structure (121) is located is arranged in parallel with the plane in which the plurality of stacking mechanisms (110) are located, and the reclaiming structure (121) is suitable for removing a positive electrode sheet body (610) comprising a plurality of positive electrode sheet units (611). ) or the negative electrode sheet bodies (710) comprising several negative electrode sheet units (711) are alternately fed to each of the stacking mechanisms (110); The swinging and unwinding mechanism is arranged corresponding to the stacking mechanism (110) and is suitable for driving the diaphragm to move back and forth. 2. The lamination device according to claim 1, characterized in that, the lamination device further comprises a positive electrode deviation correction mechanism (140) and a negative electrode deviation correction mechanism (150), and the feeding mechanism (120) is suitable for The positive electrode deviation correction mechanism (140), the negative electrode deviation correction mechanism (150) and a plurality of the stacking mechanisms (110) are switched. 3. The stacking device according to claim 2, characterized in that, two of the stacking mechanisms (110) are arranged at opposite intervals, and four of the reclaiming structures (121) are arranged at intervals along the circumferential direction, so The feeding mechanism (120) reciprocates around the vertical direction, so as to drive the reclaiming structure (121) in the adjacent positive electrode rectifying mechanism (140) and the stacking mechanism (110), the adjacent Switching between the negative electrode deviation correction mechanism (150) and the stacking mechanism (110). 4 . The lamination device according to claim 3 , wherein the feeding mechanism ( 120 ) further comprises a lift driving structure, and the lift driving structure is drivingly connected with the four reclaiming structures ( 121 ). 5 . 5 . The lamination device according to claim 3 , wherein the positive electrode deviation correction mechanism ( 140 ) and the negative electrode deviation correction mechanism ( 150 ) are arranged between the two stacking mechanisms ( 110 ) and are opposite to each other. 6 . The two stacking mechanisms (110) are located at intervals, and the straight line where the positive deviation rectification mechanism (140) and the negative deviation rectification mechanism (150) are located are perpendicular to each other. 6. The lamination device according to any one of claims 3-5, characterized in that, each of the lamination mechanisms (110) is provided with several lamination positions, and the positive electrode deviation correction mechanism (140) A number of positive electrode deviation correction positions are provided on the upper part, and a plurality of negative electrode deviation correction positions are provided on the negative electrode deviation correction mechanism (150), and the reclaiming structure (121) can simultaneously control a plurality of the positive electrode body (610) or a plurality of negative electrode deviation correction positions. The negative electrode sheet (710) is transported. 7. The lamination device according to any one of claims 1-5, wherein the reclaiming structure (121) is an adsorption structure. 8. A lamination production line, characterized by comprising the lamination device (100) according to any one of claims 1-7. 9 . The lamination production line according to claim 8 , wherein the lamination production line further comprises a hot-press separation mechanism ( 130 ), and the hot-press separation mechanism ( 130 ) is arranged on the stack table mechanism ( 110 ). Downstream of ), the hot-pressing separation mechanism (130) is adapted to hot-press and cut the battery cells to form a plurality of battery cells. 10 . The lamination production line according to claim 9 , wherein a transfer mechanism ( 160 ) is provided between the stacking mechanism ( 110 ) and the hot-pressing separation mechanism ( 130 ). 11 . 11. The lamination production line according to claim 8, wherein the lamination production line further comprises a positive electrode tablet conveying line (200) and a negative electrode tablet conveying line (300), the positive electrode tablet conveying line ( The tail end of 200) and the tail end of the negative electrode sheet conveying line (300) are both arranged corresponding to the lamination device (100). 12. The lamination production line according to claim 11, characterized in that, the positive electrode sheet-forming conveying line (200) and the negative electrode sheet-forming conveying line (300) both comprise a pole-piece tab-making device ( 400) and a pole piece cutting and conveying device (500), the pole piece cutting and conveying device (500) is suitable for cutting the positive electrode sheet material belt (600) or the negative electrode sheet material belt (700) to form a plurality of positive electrode sheet bodies (610) or several negative electrode sheets (710), and transport the several positive electrode sheets (610) or several negative electrode sheets (710) toward the stacking device (100). 13. The lamination production line according to claim 12, wherein the pole piece cutting and conveying device (500) comprises: a driving structure (510), suitable for driving the positive electrode sheet material belt (600) or the negative electrode sheet material belt (700); an adsorption conveyor belt (520), which is arranged downstream of the driving structure (510), and a plurality of the adsorption conveyor belts (520) are arranged at intervals along the driving direction of the driving structure (510); a cutting structure (530), which is provided at an interval corresponding to two adjacent suction conveyor belts (520); The output conveyor belt (540) is arranged downstream of the plurality of adsorption conveyor belts (520), and is suitable for receiving and conveying the positive electrode sheet body (610) or the negative electrode sheet body (710) output by the adsorption conveyor belt (520) . 14. The lamination production line according to claim 13, wherein the suction conveyor belt (520) comprises a suction area (521) and a release area (522), the suction area (521) and the release area (522) is arranged along the conveying direction of the adsorption conveyor belt (520), the release area (522) is arranged on both sides of the adsorption area (521), and the output conveyor belt (540) has the same The conveying belt (520) has a first conveying state with the same conveying speed, and also has a second conveying state that is greater than the conveying speed of the adsorption conveying belt (520). 15. The lamination production line according to claim 12, wherein the pole piece cutting and conveying device (500) comprises a die-cutting roller mechanism (550), and the die-cutting roller mechanism (550) comprises correspondingly arranged A die roll (551) and a punch roll (552), the die roll (551) is provided with a die edge (5511), and the punch roll (552) is provided with a punch edge (5521) ), the die cutting edge (5511) and the punching die cutting edge (5521) are matched, and the positive electrode sheet material strip ( 600) or the negative electrode sheet material strip (700) is passed through, and the female die cutting edge (5511) and the punch die cutting edge (5521) are suitable for cutting the positive electrode sheet material tape (600) or the negative electrode sheet material tape ( 700).

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