CN219521199U - Battery cell production line - Google Patents

Abstract

The utility model provides a battery cell production line; the lithium battery production line comprises a first pole piece production line, a second pole piece production line and a lamination production line; the first pole piece production line processes the first pole piece through a first blanking mechanism and a first laser cutting mechanism; the second pole piece production line processes the second pole piece through a second blanking mechanism, a second laser cutting mechanism, a thermal compounding mechanism and a third blanking mechanism; the lamination production line is provided with a bearing table and a manipulator; the manipulator alternately grabs the first pole piece and the second pole piece to be stacked on the bearing table so as to form the battery cell. According to the utility model, the first pole piece and the second pole piece are processed in a separate process, and the battery core is automatically laminated, so that the effect of reducing burrs of a product is achieved, the production efficiency is improved, and the production cost is reduced.

Description

Battery cell production line

Technical Field

The utility model relates to the field of lithium battery manufacturing, in particular to a battery cell production line.

Background

Currently, the pole piece of the lithium battery is mainly produced by one of two manufacturing processes of blanking mechanism (hardware cutting die) or laser cutting. Firstly, due to the limitation of a cutting die, the produced product has the defects of incomplete cutting, large burrs and large size difference, the cutting die of the cutting mechanism is extremely easy to wear, and the cutting die needs to be frequently maintained and replaced, so that the production cost of cutting out the pole piece is overlarge; secondly, although the laser cutting is provided with a dust removing system, the dust removing system can not solve the problems of high Wen Rongzhu adhesion of the surfaces of products, slag and other byproducts, and the yield of the products is low.

The current lamination type battery cell is formed by alternately stacking a diaphragm coil, a positive plate and a negative plate produced by the equipment, so that the production quality of the battery cell is poor and the production requirement cannot be met; and because the positive plate and the negative plate need to be subjected to heat recombination treatment of the diaphragm, the process is complex and the production cost is high.

Disclosure of Invention

The utility model aims to provide a battery core production line, which can solve the problems of poor processing precision and more burrs of pole pieces and produce high-quality pole pieces so as to stack and form a battery core with good quality.

The utility model provides a battery cell production line, which comprises a first pole piece production line, a second pole piece production line and a lamination production line;

the first pole piece production line is sequentially provided with a first conveying mechanism, a first blanking mechanism, a second conveying mechanism, a first laser cutting mechanism and a first film and a second film which are distributed on the upper side and the lower side of the first pole piece production line; the first film and the second film form a first clamping channel between the rear end of the second conveying mechanism and the rear end of the first laser cutting mechanism;

the second pole piece production line is sequentially provided with a third conveying mechanism, a second blanking mechanism, a fourth conveying mechanism, a second laser cutting mechanism, a fifth conveying mechanism, a thermal compounding mechanism, a third blanking mechanism and third films, fourth films, a first diaphragm and a second diaphragm which are distributed on the upper side and the lower side of the second pole piece production line; the third film and the fourth film form a second clamping channel between the rear end of the fourth conveying mechanism and the rear end of the second laser cutting mechanism; one surfaces of the first diaphragm and the second diaphragm are respectively positioned on the upper surface and the lower surface of the second pole piece between the rear end of the fifth conveying mechanism and the rear end of the third blanking mechanism, and the third diaphragm and the fourth diaphragm form a third clamping channel;

the lamination production line is provided with a bearing table and a manipulator; the manipulator alternately grabs the first pole piece and the second pole piece to be stacked on the bearing table so as to form the battery cell.

In an alternative embodiment, a separation channel is formed between the second clamping channel and the third clamping channel; the fifth conveying mechanism is located in the separation channel.

In an alternative embodiment, the first pole piece production line and the second pole piece production line are provided with a plurality of rubber rolls; the rubber rollers are arranged at intervals to form the first clamping channel, the second clamping channel and the third clamping channel.

In an alternative embodiment, the thermal compounding mechanism includes an oven and a heated platen; the third film and the fourth film penetrate through the oven; the hot press roller is located at the output end of the oven.

In an alternative embodiment, the lamination production line is further provided with a pressing knife, a feeding mechanism and a lifting mechanism; the manipulator is provided with a first groove; when the manipulator grabs the first pole piece or the second pole piece to be stacked on the bearing table, the feeding mechanism and the lifting mechanism drive the pressing knife to extend into the first groove and abut against one surface of the first pole piece or the second pole piece, which is attached to the manipulator.

In an alternative embodiment, the number of manipulators is two; the two manipulators are respectively used for grabbing the first pole piece and the second pole piece; when one manipulator is positioned on the bearing table, the other manipulator is positioned outside the bearing table.

In an alternative embodiment, the bearing table is provided with a plurality of vacuum pores; and the vacuum pores are used for adsorbing the first pole piece or the second pole piece.

In an alternative embodiment, the two sides of the bearing table are provided with second grooves; the second slot extends to either the first pole piece or the second pole piece.

In an alternative embodiment, the first film, the second film, the third film, and the fourth film are all released and rolled by an unwind mechanism.

In an alternative embodiment, the lamination production line further comprises a first positioning platform, a second positioning platform and a sixth conveying mechanism; the sixth conveying mechanism is positioned between the third blanking mechanism and the second positioning platform; the first positioning platform is positioned at the second end of the first clamping channel; the first positioning platform and the second positioning platform are both positioned in the grabbing range of the manipulator.

Compared with the prior art, the utility model has the beneficial effects that:

firstly, the first pole piece is subjected to station transfer through the first conveying mechanism and the second conveying mechanism, and the second pole piece is subjected to station transfer through the third conveying mechanism and the fourth conveying mechanism, so that the production automation level is high; secondly, the first pole piece is subjected to separate-procedure processing by utilizing the first blanking mechanism and the first laser cutting mechanism to form a first pole lug with a pole lug, the second pole piece is subjected to separate-procedure processing by utilizing the second blanking mechanism, the second laser cutting mechanism and the third blanking mechanism to form a second pole piece with a pole lug, and a second pole piece finished product is subjected to thermal compounding with the first diaphragm and the second diaphragm; finally, the first pole piece and the second pole piece are stacked by the mechanical arm to form the battery cell, and only one of the first pole piece and the second pole piece is required to be subjected to thermal compounding, so that the manufacturing process is simplified, and the manufacturing cost is reduced; in addition, the product of the utility model has the advantages of small error, smooth contour and smooth surface, and the blanking mechanism has slight cutter die abrasion and low maintenance cost, thereby being beneficial to industrial production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a cell production line of the present embodiment;

FIG. 2 shows a schematic diagram of the pole piece structure of the first embodiment;

FIG. 3 shows a second schematic illustration of the pole piece structure of the present embodiment;

FIG. 4 shows a third schematic illustration of the pole piece structure of the present embodiment;

FIG. 5 shows a fourth schematic illustration of the pole piece structure of the present embodiment;

fig. 6 shows a schematic structural view of a lamination line;

FIG. 7 shows a schematic structural diagram of a robot and a platform;

fig. 8 shows a finished view of the cell.

Description of main reference numerals:

100-a first pole piece production line; 110-a first conveying mechanism; 120-a first blanking mechanism; 130-a second conveying mechanism; 140-a first laser cutting mechanism; 150-a first film; 160-a second film; 200-a second pole piece production line; 210-a third conveying mechanism; 220-a second blanking mechanism; 230-fourth conveying mechanism; 240-a second laser cutting mechanism; 250-a fifth conveying mechanism; 260-a thermal compounding mechanism; 270-a third blanking mechanism; 280-a third membrane; 290-fourth membrane; 291-first separator; 292-a second separator; 300-lamination production line; 310-bearing table; 311-second groove; 320-a manipulator; 321-a first groove; 330-pressing a knife; 340-a feed mechanism; 350-lifting mechanism; 360-a first positioning platform; 370-a second positioning stage; 380-a sixth conveying mechanism; 400-a first pole piece roll; 410-a first pole piece; 411-guard region; 412-a cutting zone; 413-tabs; 500-second pole piece roll; 600-cell; 700-unreeling mechanism; 800-traction mechanism;

1-a first rubber roll; 2-a second rubber roller; 3-a third rubber roller; 4-a fourth rubber roller; 5-a fifth rubber roll; 6-sixth rubber roll; 7-seventh rubber roll; 8-eighth rubber roll; 9-ninth rubber roll; 10-tenth rubber roll; 11-eleventh rubber roll; 12-twelfth rubber roll; 13-thirteenth rubber roll; 14-fourteenth rubber roller.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

Referring to fig. 1, before processing, a strip-shaped pole piece is wound to form a pole piece roll, the pole piece roll is an anode roll or a cathode roll, a coating mode is continuous coating, for convenience of description, a pole piece roll used in the first pole piece production line 100 is defined as a first pole piece roll 400, and a pole piece roll used in the second pole piece production line 200 is defined as a second pole piece roll 500; referring to fig. 5, the pole piece finished product is a pole piece with a tab 413, and has a manually preset length L and a manually preset width W, wherein the length L is a fixed value before processing in the embodiment; it should be noted that the first electrode sheet 410 is one of the positive electrode sheet and the negative electrode sheet, and the second electrode sheet is the other of the positive electrode sheet and the negative electrode sheet.

Referring to fig. 8, the present embodiment is used for producing a battery cell 600; the battery cell 600 is mainly formed by alternately stacking a first pole piece 410 and a second pole piece; the cell 600 includes two side tabs 413 or the same side tab 413 type, as illustrated in fig. 8 by two side tabs 413.

Referring to fig. 1, a production line of a battery cell 600 is shown, specifically including a first pole piece production line 100, a second pole piece production line 200, and a lamination production line 300;

the first pole piece production line 100 is sequentially provided with a first conveying mechanism 110, a first blanking mechanism 120, a second conveying mechanism 130, a first laser cutting mechanism 140, a first film 150 and a second film 160 which are distributed on the upper side and the lower side of the first pole piece production line 100;

in practical application, the first conveying mechanism 110 is configured to convey the first pole piece roll 400 to the first blanking mechanism 120, and specifically, the first conveying mechanism 110 includes a first rubber roll 1 and a second rubber roll 2; the first rubber roller 1 and the second rubber roller 2 are arranged in parallel to play a role in traction, and a first gap formed by the first rubber roller 1 and the second rubber roller 2 corresponds to the first blanking mechanism 120; the first pole piece roll 400 is intermittently unreeled and then conveyed to the first blanking mechanism 120 through the first gap; it will be appreciated that the first pole piece roll 400 is in a flat condition after being output from the first gap.

The first blanking mechanism 120 is located between the first conveying mechanism 110 and the second conveying mechanism 130 and is used for cutting the first pole piece roll 400 to form a first pole piece 410; as shown in fig. 2, the first pole piece 410 formed by punching is rectangular; in practical application, the first punching mechanism 120 is a numerical control punch, that is, the punching mechanism automatically punches once at intervals, and the width W of the first pole piece 410 formed by punching is a preset width; compared with the first pole piece 410 with the pole lug 413 directly cut, the matching requirement on the cutter is low, and the blanking mechanism only carries out straight cutting action, so that the abrasion on the cutter die is small compared with the first pole piece 410 with the pole lug 413 directly blanked, and the maintenance and replacement cost is saved.

As shown in fig. 1, the second conveying mechanism 130 is configured to convey the first pole piece 410 from the first blanking mechanism 120 to the first laser cutting mechanism 140, and because the first pole piece roll 400 is intermittently unreeled and then is intermittently blanked in cooperation with the first blanking mechanism 120, a plurality of blanked first pole pieces 410 are arranged on the second conveying mechanism 130 at intervals along the conveying direction, so that mutual interference between adjacent first pole pieces 410 is avoided, and smooth processing is facilitated.

The second conveying mechanism 130 in this embodiment is a clamping conveying member; the clamping conveying piece is provided with a conveying channel; one end of the conveying channel corresponds to the first blanking mechanism 120, in this embodiment, the clamping conveying member is cuboid, the contour of the conveying channel is adaptive to the contour of the pole piece, and in order to prevent the pole piece from being lifted away from one end of the blanking mechanism due to blanking force, the height of the conveying channel is set to be close to the thickness of the pole piece, and in this embodiment, the clamping conveying member is favorable for keeping the pole piece in a stable position in blanking and conveying processes, and displacement and blocking do not occur.

The first film 150 and the second film 160 form a first nip channel between the rear end of the second transport mechanism 130 and the rear end of the first laser cutting mechanism 140; specifically, the upper side of the first pole piece production line 100 is provided with a third rubber roller 3 and a fourth rubber roller 4, and the lower side thereof is correspondingly provided with a fifth rubber roller 5 and a sixth rubber roller 6; the third rubber roller 3 and the fifth rubber roller 5 form the input end of the first clamping channel, the fourth rubber roller 4 and the sixth rubber roller 6 form the output end of the first clamping channel, namely, the first film 150 is input from the third rubber roller 3, the fourth rubber roller 4 is output, the second film 160 is input from the fifth rubber roller 5, and the sixth rubber roller 6 is output;

the first film 150 and the second film 160 of the present embodiment are transparent films of PET film, TLT composite film, PEN film, etc. or dark films with better light transmittance, so as to prevent laser reflection; the thickness of the first and second films 150 and 160 should be controlled within a range effective to grip and transport the first pole piece 410, for example: 0.25-1.5mm; the first film 150 and the second film 160 are clamped together to drive the first pole piece 410 to move.

Referring to fig. 3, the first pole piece 410 includes a protection area 411 and a cutting area 412; the first film 150 continuously and completely covers both sides of the first pole piece 410 in the width W direction, and the first film 150 exceeds one side of the first pole piece 410 away from the cutting region 412 in the length L direction; the protection zone 411 is carried by the second film 160; the first film 150 and the second film 160 move with the protective region 411 therebetween; referring to fig. 1, the first laser cutting mechanism 140 includes a laser cutter head (not shown); when the first pole piece 410 moves to the laser cutting mechanism, the cutting area 412 corresponds to the laser cutter head, at this time, the first film 150 and the second film 160 pause movement, and start laser cutting, the first film 150 effectively protects the coating area of the first pole piece 410, prevents molten beads from splashing, and continues to move until the cutting area 412 of the next first pole piece 410 corresponds to the laser cutter head after cutting is completed, and the cycle is performed, namely, the first film 150 and the second film 160 are in intermittent transmission; in this embodiment, the shape and size of the tab 413 are defined by the programming of the first laser cutting mechanism 140 to cut the tab 413 meeting the production requirement, so that the cutting precision is high and the cutting contour is smooth.

Referring to fig. 4, the first laser cutting mechanism 140 cuts the tab 413 of the first pole piece 410, that is, the first laser cutting mechanism 140 cuts the tab 413 to form a finished product of the first pole piece 410, where the tab 413 is located in the middle of one side of the first pole piece 410;

in the embodiment, the protection area 411 of the first pole piece 410 is clamped between the first film 150 and the second film 160, so that molten beads and slag are prevented from splashing during laser cutting, the surface smoothness of the pole piece is ensured, and the product quality is improved; and the driving speeds of the first film 150 and the second film 160 are the same to ensure the smoothness of the transportation of the first pole piece 410.

In addition, as the laser cutter head generates a trace amount of air flow during laser cutting, the first film 150 is tightly pressed against the protection area 411, so that the first pole piece 410 is prevented from tilting or shifting, and the cutting precision is improved; the cutting area 412 moves to the position corresponding to the laser cutter head, the first film 150 and the second film 160 pause movement, and the movement is continued after the cutting is completed, namely, the first film 150 and the second film 160 are intermittently driven; in this embodiment, the cutting area 412 is exposed, so that the first film 150 does not need to be cut, the air consumption of the laser cutting mechanism is smaller, and the protection degree is higher; and the first film 150 remains intact, and is recovered and reused after being rolled, so that the production cost is effectively reduced.

The second die production line 200 is provided with a third conveying mechanism 210, a second blanking mechanism 220, a fourth conveying mechanism 230, a second laser cutting mechanism 240, a fifth conveying mechanism 250, a thermal compounding mechanism 260, a third blanking mechanism 270, a third film 280, a fourth film 290, a first diaphragm 291 and a second diaphragm 292 which are distributed on the upper side and the lower side of the second die production line 200 in sequence;

the third conveying mechanism 210 is similar to the first conveying mechanism 110, and the second and third blanking mechanisms 220, 270 are similar to the first blanking mechanism 120; the fourth and fifth transport mechanisms 230, 250 are similar to the second transport mechanism 130; the second laser cutting mechanism 240 is similar to the first laser cutting mechanism 140; the present embodiment is not described in detail.

In practical use, the thermal compounding mechanism 260 includes an oven and a heated platen roller; the third film 280 and the fourth film 290 are arranged in the oven in a penetrating way, namely, the second pole piece clamped by the third film 280 and the fourth film 290 passes through the oven; the hot press roller is positioned at the output end of the oven.

Between the rear end of the fourth transport mechanism 230 and the rear end of the second laser cutting mechanism 240, the third film 280 and the fourth film 290 form a second nip channel; between the rear end of the fifth conveying mechanism 250 and the rear end of the third blanking mechanism 270, one surfaces of the first diaphragm 291 and the second diaphragm 292 are respectively positioned on the upper surface and the lower surface of the second pole piece, and the third film 280 and the fourth film 290 form a third clamping channel; specifically, a separation channel is formed between the second clamping channel and the third clamping channel; the fifth transport mechanism 250 is located within the separation channel.

Specifically, a seventh rubber roll 7, an eighth rubber roll 8, a ninth rubber roll 9 and a tenth rubber roll 10 are arranged on the upper side of the second production line, and an eleventh rubber roll 11, a twelfth rubber roll 12, a thirteenth rubber roll 13 and a fourteenth rubber roll 14 are correspondingly arranged on the lower side of the second production line; the seventh rubber roll 7 and the eleventh rubber roll 11 form an input end of a second clamping channel, the eighth rubber roll 8 and the twelfth rubber roll 12 form an output end of the second clamping channel, the ninth rubber roll 9 and the thirteenth rubber roll 13 form an input end of a third clamping channel, the tenth rubber roll 10 and the fourteenth rubber roll 14 form an output end of the third clamping channel, namely, a third film 280 is input from the seventh rubber roll 7, the eighth rubber roll 8 is output, and is input again at the ninth rubber roll 9, and the tenth rubber roll 10 is output again; the fourth film 290 is input from the eleventh rubber roll 11, output from the twelfth rubber roll 12, input again at the thirteenth rubber roll 13, and output again from the fourteenth rubber roll 14; in practical applications, the hot press roller and the tenth rubber roller 10 may be the same roller, and of course, the present embodiment does not exclude a design scheme of dividing the hot press roller and the tenth rubber roller into two independent rollers.

Further, a plurality of rubber rollers are further arranged between the eighth rubber roller 8 and the ninth rubber roller 9 to open the separation channel, and the twelfth rubber roller 12 and the thirteenth rubber roller 13 are correspondingly arranged to synchronously open the separation channel, so that the first diaphragm 291 and the second diaphragm 292 have enough space to be arranged in the separation channel.

Referring to fig. 1, further, the first film 150, the second film 160, the third film 280 and the fourth film 290 are all released and rolled by the unreeling mechanism 700; specifically, the first film 150 is released at the third rubber roll 3 and wound up at the fourth rubber roll 4; the second film 160 is released at the fifth glue roll 5 and wound up at the sixth glue roll 6; similarly, the third film 280 is released at the seventh glue roll 7 and wound up at the tenth glue roll 10; the fourth film 290 is released at the eleventh glue roll 11 and wound up at the fourteenth glue roll 14.

Further, the first pole piece production line 100 and the second pole piece production line 200 are respectively provided with a traction mechanism 800, and the traction mechanism 800 is used for adjusting the tension of the first film 150, the second film 160, the third film 280 and the fourth film 290, so that the first film 150, the second film 160, the third film 280 and the fourth film 290 are prevented from being twisted and wound, and the operation reliability is improved; the traction mechanism 800 of the present embodiment is a prior art, and will not be described in detail.

Referring to fig. 6 and 7, a lamination line 300 is provided with a carrying table 310 and a robot 320; the susceptor 310 is provided with vacuum holes (not shown) and a second groove 311; the number of the vacuum pores is a plurality, and the vacuum pores are used for adsorbing the first pole piece 410 or the second pole piece to form a reference, wherein the first pole piece 410 or the second pole piece is the first pole piece positioned on the bearing table 310; the second grooves 311 are positioned at two sides of the bearing table 310 and extend to the first pole piece 410 or the second pole piece, and when the stacking layer number of the battery cells 600 reaches a preset layer number, the second grooves 311 provide holding and grabbing abdications for the transfer of the subsequent battery cells 600; the manipulator 320 alternately grabs the first pole piece 410 and the second pole piece to be stacked on the carrier 310 to form the battery cell 600. The number of the manipulators 320 is two; the two manipulators 320 are respectively used for grabbing the first pole piece 410 and the second pole piece; when one of the robots 320 is located at the loading stage 310, the other robot 320 is located outside the loading stage 310, thereby eliminating position waiting and information interaction time and greatly improving lamination efficiency.

Further, the lamination production line 300 is further provided with a pressing blade 330, a feeding mechanism 340 and a lifting mechanism 350; the manipulator 320 is provided with a first slot 321; when the manipulator 320 grabs the first pole piece 410 or the second pole piece to be stacked on the carrying platform 310, the feeding mechanism 340 and the lifting mechanism 350 drive the pressing knife 330 to extend into the first groove 321 and abut against one surface of the first pole piece 410 or the second pole piece, which is attached to the manipulator 320; it can be appreciated that the pressing knife 330, the feeding mechanism 340 and the lifting mechanism 350 are one module, and the carrying platform 310 can be provided with four modules to simultaneously press against the first pole piece 410 or the second pole piece on the manipulator 320, so that the stress is more uniform, the grabbing is more stable, and the first pole piece 410 or the second pole piece is prevented from being scratched or falling obliquely.

Further, the lamination production line 300 of the present embodiment further includes a first positioning platform 360, a second positioning platform 370, and a sixth conveying mechanism 380; the sixth conveying mechanism 380 is located between the third blanking mechanism 270 and the second positioning platform 370, and the sixth conveying mechanism 380 is similar to the second conveying mechanism 130; the first positioning platform 360 is located at the second end of the first clamping channel; the first positioning stage 360 and the second positioning stage 370 are both located within the gripping range of the robot 320.

Specifically, the first positioning stage 360 and the second positioning stage 370 adopt CCD photographing positioning or mechanical positioning.

Further, the lamination line 300 may be plural.

Operation principle of cell 600 production line:

(1) First pole piece production line 100: intermittently unreeling the first pole piece roll 400; the first pole piece roll 400 is output to the second conveying mechanism 130 through the first gap, and at this time, the first pole piece roll 400 is in a straight state; the first blanking mechanism 120 stops after blanking once, and when the last pole piece is transported to the preset position, the first pole piece roll 400 is unreeled again and then the first blanking mechanism 120 blanking again; the punched first pole piece 410 is clamped and moved to the first laser cutting mechanism 140 through the first film 150 and the second film 160, when the cutting area 412 is opposite to the laser cutter head, the first film 150 and the second film 160 pause movement, and the first laser cutting mechanism 140 performs laser cutting; after the cutting is completed, the first film 150 and the second film 160 clamp the cut first pole piece 410 to continue to move to the first positioning platform 360, and the first film 150 and the second film 160 are separated and rolled up respectively.

(2) Second pole piece production line 200: the step from unreeling to laser cutting of the second pole piece roll 500 is the same as the step from unreeling to laser cutting of the first pole piece roll 400, and is not repeated here, after cutting is completed, the third film 280 and the fourth film 290 are separated from each other to form a separation channel, the cut second pole piece is continuously transported by the fifth transport mechanism 250, the first diaphragm 291 and the second diaphragm 292 are respectively input and positioned on the upper and lower surfaces of the second pole piece, the third film 280 and the fourth film 290 immediately follow the first diaphragm 291 and the second diaphragm 292 to re-input and clamp the second pole piece attached with the first diaphragm 291 and the second diaphragm 292, the second pole piece is transported to an oven to be baked, after hot pressing is performed at an outlet of the oven, the third film 280 and the fourth film 290 are separated and respectively reeled up, the second pole piece is input to the sixth transport mechanism 380, the third blanking mechanism 270 is blanked, and the sixth transport mechanism 380 is used for transporting the blanked second pole piece to the second positioning platform 370.

(3) Lamination line 300: the mechanical arm 320 grabs the first pole piece 410 or the second pole piece and stacks the first pole piece or the second pole piece on the bearing table 310, the feeding mechanism 340 moves away from the mechanical arm 320 and leaves the bearing table 310, the lifting mechanism 350 rises to be higher than the pole piece to be stacked, the feeding mechanism 340 drives the pressing knife 330 to move towards the mechanical arm 320 and stretches the pressing knife 330 into the first groove 321, the lifting mechanism 350 drops down to abut against the pole piece to be stacked, and the mechanical arm 320 continuously goes to grab the pole piece after discharging the pole piece; when one of the manipulators 320 grabs the first pole piece 410 and stacks it on the carrying table 310, the other manipulator 320 leaves the carrying table 310 and goes to grab the second pole piece, and the first pole piece located on the carrying table 310 is adsorbed by the vacuum fine holes to form a reference.

The utility model processes the first pole piece 410 and the second pole piece in a separate process, has less burrs and high processing quality, and only processes the second pole piece by the thermal compounding treatment of the diaphragm, thereby reducing the production cost while meeting the production requirement of stacking the battery cells 600.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The battery cell production line is characterized by comprising a first pole piece production line, a second pole piece production line and a lamination production line;

the first pole piece production line is sequentially provided with a first conveying mechanism, a first blanking mechanism, a second conveying mechanism, a first laser cutting mechanism and a first film and a second film which are distributed on the upper side and the lower side of the first pole piece production line; the first film and the second film form a first clamping channel between the rear end of the second conveying mechanism and the rear end of the first laser cutting mechanism;

the second pole piece production line is sequentially provided with a third conveying mechanism, a second blanking mechanism, a fourth conveying mechanism, a second laser cutting mechanism, a fifth conveying mechanism, a thermal compounding mechanism, a third blanking mechanism and third films, fourth films, a first diaphragm and a second diaphragm which are distributed on the upper side and the lower side of the second pole piece production line; the third film and the fourth film form a second clamping channel between the rear end of the fourth conveying mechanism and the rear end of the second laser cutting mechanism; one surfaces of the first diaphragm and the second diaphragm are respectively positioned on the upper surface and the lower surface of the second pole piece between the rear end of the fifth conveying mechanism and the rear end of the third blanking mechanism, and the third diaphragm and the fourth diaphragm form a third clamping channel;

the lamination production line is provided with a bearing table and a manipulator; the manipulator alternately grabs the first pole piece and the second pole piece to be stacked on the bearing table so as to form the battery cell.

2. The cell production line of claim 1, wherein a separation channel is formed between the second clamping channel and the third clamping channel; the fifth conveying mechanism is located in the separation channel.

3. The cell production line of claim 2, wherein the first pole piece production line and the second pole piece production line are each provided with a plurality of glue rolls; the rubber rollers are arranged at intervals to form the first clamping channel, the second clamping channel and the third clamping channel.

4. The cell production line of claim 1, wherein the thermal compounding mechanism comprises an oven and a thermo-compression roller; the third film and the fourth film penetrate through the oven; the hot press roller is located at the output end of the oven.

5. The cell production line of claim 1, wherein the lamination production line is further provided with a pressing knife, a feeding mechanism and a lifting mechanism; the manipulator is provided with a first groove; when the manipulator grabs the first pole piece or the second pole piece to be stacked on the bearing table, the feeding mechanism and the lifting mechanism drive the pressing knife to extend into the first groove and abut against one surface of the first pole piece or the second pole piece, which is attached to the manipulator.

6. The cell production line of claim 1, wherein the number of manipulators is two; the two manipulators are respectively used for grabbing the first pole piece and the second pole piece; when one manipulator is positioned on the bearing table, the other manipulator is positioned outside the bearing table.

7. The cell production line of claim 1, wherein the carrier is provided with a plurality of vacuum holes; and the vacuum pores are used for adsorbing the first pole piece or the second pole piece.

8. The cell production line of claim 1, wherein the carrier is provided with second grooves on both sides; the second slot extends to either the first pole piece or the second pole piece.

9. The cell line of claim 1, wherein the first film, the second film, the third film, and the fourth film are each released and rolled by an unwind mechanism.

10. The cell production line of any one of claims 1 to 9, wherein the lamination production line further comprises a first positioning stage, a second positioning stage, and a sixth conveying mechanism; the sixth conveying mechanism is positioned between the third blanking mechanism and the second positioning platform; the first positioning platform is positioned at the second end of the first clamping channel; the first positioning platform and the second positioning platform are both positioned in the grabbing range of the manipulator.